CN116557276A - Diaphragm compressor oil circuit system and its method of replenishing oil - Google Patents

Abstract

The invention relates to the field of diaphragm compressors, and discloses an oil circuit system of a diaphragm compressor and an oil replenishing method thereof. The oil circuit system of a diaphragm compressor includes an oil cavity (11) in a cavity (1) of a diaphragm cylinder body, The oil supply passage (2) and the oil overflow passage (3) respectively connected with the oil chamber (11), as well as the oil supply flowmeter (21) and the oil overflow flowmeter (31), the oil supply flowmeter (21) is set in the oil supply The road (2) is used to measure the amount of oil replenishment, and the oil spill flow meter (21) is arranged on the oil spill road (3) to measure the amount of oil spilled. The oil circuit system of the diaphragm compressor of the present invention can accurately know the actual oil replenishment amount to the oil chamber through the oil replenishment flow meter arranged on the oil replenishment road and the oil spill flow meter arranged on the oil overflow road, and then adjust and determine the next time The specific amount of oil replenishment during oil replenishment effectively solves the problem in the prior art that oil replenishment is performed on the oil chamber based on experience values, resulting in too much or too little oil replenishment.

Description

Diaphragm compressor oil circuit system and its method of replenishing oil

technical field

The invention relates to the field of diaphragm compressors, in particular to an oil circuit system of a diaphragm compressor and an oil replenishing method thereof.

Background technique

Diaphragm-type hydrogen compressor sucks and compresses gas through the operation of the piston between its top dead center and bottom dead center. When compressing the gas, the piston pushes hydraulic oil in the direction of top dead center, and the hydraulic oil pushes The diaphragm protrudes toward the side of the air cavity, and the gas is compressed through the diaphragm; when inhaling, the piston moves to the bottom dead center. The diaphragm in the cavity protrudes toward the hydraulic oil side. Under normal circumstances, when the piston moves When it reaches the bottom dead center, the hydraulic oil in the oil chamber in the cavity accounts for 25% of the entire cavity volume, that is, the thickness of the oil pad, which is usually referred to as the thickness of the oil pad to prevent the diaphragm from beating the cylinder when it inhales. At this time, the volume of the air cavity Accounting for 75% of the cavity volume. During the actual operation of the diaphragm compressor, the hydraulic oil will inevitably leak at the piston. When the oil is insufficient, the stroke of the piston will be reduced and cannot reach its bottom dead center, resulting in an increase in the clearance volume and a decrease in the suction capacity. Little or no gas can be sucked in, and the thickness of the oil pad may be too thin, which will cause the diaphragm in the cavity to hit the inner wall of the cavity when the compressor sucks in air, resulting in a clattering phenomenon. Therefore, the general diaphragm compressor is equipped with an oil replenishment circuit to replenish oil in the oil chamber in time.

At present, in the prior art, oil is replenished to the oil cavity through a plunger pump on the oil replenishment road, and the oil replenishment amount is replenished according to the leakage amount experienced, and the actual amount of hydraulic oil replenished each time is unknown. The above oil replenishment method has the following problems: when the oil replenishment is too much, the oil pad between the diaphragm and the oil distribution plate will be too thick, so that the suction volume is insufficient; when the oil replenishment is too little, the diaphragm and the distribution plate may be The oil pad between the oil pans disappears, and the phenomenon of clapping occurs when the air is sucked (that is, the diaphragm directly collides with the inner wall of the cavity), which affects the service life of the diaphragm, reduces the stability of the machine, and generates greater noise; In addition, too little supplementary oil will also cause the diaphragm to fail to reach the required top dead center when the gas is compressed, resulting in too much residual gas, which will reduce the inhalation volume during the next inhalation.

Contents of the invention

The purpose of the present invention is to overcome the problem that the amount of oil replenishment in the prior art cannot be accurately controlled, and to provide a diaphragm compressor oil circuit system, which can automatically control the oil replenishment amount, effectively preventing the Suction reduction caused by too much or too little oil replenishment or the problem of diaphragm clapping the cylinder.

In order to achieve the above object, the present invention provides an oil circuit system for a diaphragm compressor on the one hand, which includes an oil chamber in the cavity of the diaphragm cylinder, a supplementary oil passage and an oil overflow passage communicated with the oil chamber, and a supplementary oil flow rate meter and an oil overflow flow meter, the oil replenishment flow meter is arranged on the oil replenishment road for measuring the amount of oil replenishment, and the oil overflow flow meter is arranged on the oil overflow road for measuring the oil overflow amount.

Preferably, a booster pump is provided on the oil supply line, and the oil charge flowmeter is located between the booster pump and the oil chamber.

Preferably, one end of the oil supply circuit is connected to the oil tank, and the other end is connected to the oil chamber, and one end of the oil overflow circuit is connected to the oil tank, and the other end is connected to the oil chamber.

Preferably, an overflow valve is arranged on the oil overflow road.

Preferably, the oil circuit system of the diaphragm compressor includes a control mechanism, the control mechanism is configured to receive information from the charge oil flow meter and the overflow oil flow meter, and control the charge oil amount of the booster pump according to the information .

Preferably, the diaphragm compressor oil circuit system includes a detection device for detecting the thickness of the oil pad in the oil chamber,

The detection device is arranged on the outer wall of the cylinder connected to the oil chamber.

Preferably, the detection device is a vibration sensor or an acoustic emission sensor.

Preferably, the control mechanism is configured to receive the detection information of the detection device, and control the opening and closing of the booster pump according to the detection information.

Another aspect of the present invention provides a method for replenishing oil in the oil circuit system of a diaphragm compressor. The method for replenishing oil in the oil circuit system of a diaphragm compressor is implemented by the oil circuit system of the diaphragm compressor described above. The oil replenishing method includes The following steps:

S1. Under the normal working state of the diaphragm compressor, the booster pump periodically replenishes oil into the oil chamber when the diaphragm compressor sucks air under the control of the control mechanism. When replenishing oil, the booster pump is controlled by the control mechanism to inject the minimum oil replenishment amount A0 into the oil cavity, and the oil replenishment amount A1=A0 measured by the oil replenishment flowmeter, after this oil replenishment, The diaphragm compressor compresses the gas. When the piston reaches the top dead center, the oil overflow flow meter measures the oil spill A2, and the control mechanism judges and analyzes the oil spill A2 as follows, and according to the specific The judgment result gives specific instructions for the next oil replenishment:

When the oil overflow amount A2 in the oil overflow channel measured by the oil overflow flowmeter is 0, it indicates that the replenishment amount is insufficient. During the second replenishment, the control mechanism controls the replenishment of the booster pump. The oil quantity is A0+a, if A2 is still 0, when replenishing oil for the third time, continue to control the oil replenishment quantity of the booster pump to be A0+2a until A2>0, that is, the oil quantity in the oil chamber filled up;

When the amount of oil spilled in the oil spill channel measured by the oil overflow flowmeter is A2=A1=A0, it means that there is no shortage of oil in the oil chamber, and the control mechanism will replenish the oil for the second time after receiving the instruction. When refueling, the refueling amount will be maintained at A0;

When the amount of oil spilled in the oil spill path measured by the oil spill flowmeter A2>A1, it means that the pressure in the air cavity is too high, causing the original oil in the oil cavity to also overflow, which means When the oil in the oil chamber is insufficient, the control mechanism will control the oil replenishment of the booster pump according to the difference between A2-A1 during the second oil replenishment. If A2-A1>A0, the oil replenishment amount for the second oil replenishment is A2-A1; if A2-A1<A0, the oil replenishment amount for the second oil replenishment is A0;

S2. After the second oil replenishment, according to the oil spill A2 measured by the oil spill flow meter after the second oil replenishment, the judgment method described in step S1 is used to judge the oil spill A2 Analyze, and give specific instructions for the third oil replenishment according to the specific judgment results;

S3, when replenishing oil each time in the back, all according to the amount of oil spilled A2 measured by the oil spill flowmeter after its last oil replenishment, use the determination method described in step S1 to carry out the oil spill amount A2 Judgment analysis, and give specific instructions for the next oil replenishment according to the specific judgment results.

Another aspect of the present invention provides a method for replenishing oil in the oil circuit system of a diaphragm compressor. The method for replenishing oil in the oil circuit system of a diaphragm compressor is implemented by the above-mentioned diaphragm compressor oil circuit system, and the diaphragm compresses the The method includes the following steps:

S1. In the normal working state of the diaphragm compressor, the detection device detects in real time the oil volume value in the oil chamber when the piston of the diaphragm compressor reaches the bottom dead center, that is, the thickness of the oil pad, and the measured data Passed to the control mechanism, when the thickness of the oil pad is greater than the alarm limit value B2 meeting the minimum oil volume requirement under normal working conditions, the booster pump is in the closed state;

S2. When the thickness of the oil pad detected by the detection device is lower than the alarm limit value B2 but higher than the alarm value B3 that causes cylinder clapping, the control mechanism controls the booster pump to compress the diaphragm Supplement oil to the oil chamber when the engine is inhaling, and control the booster pump to inject the minimum replenishment amount A0 into the oil chamber through the control mechanism when replenishing oil, and the oil replenishment flowmeter measured Oil replenishment amount A1=A0, after this oil replenishment, the diaphragm compressor compresses the gas, when the piston reaches the top dead center, the oil overflow amount A2 measured by the oil overflow flowmeter, when A2≠0 When A2 = 0, it means that the oil in the oil chamber has been replenished, and the control mechanism closes the booster pump at this time; During the second oil replenishment, the oil replenishment amount of the booster pump is controlled by the control mechanism to be A0+a. If A2 is still 0, during the third oil replenishment, continue to control the oil replenishment amount of the booster pump to be A0+2a, after repeated oil replenishment until A2>0, that is, the oil volume in the oil chamber has been filled up, and at this time, the control mechanism closes the booster pump;

When the thickness of the oil pad detected by the detection device is less than or equal to the alarm value B3, the control mechanism will control the booster pump to replenish oil to the oil chamber in the above-mentioned manner. When the pump replenishes oil for more than 5 seconds and the value detected by the detection device is still less than or equal to the alarm value B3, the control mechanism controls the intake system to close, and after the oil is filled, check the intake system and reduce the intake. gas volume, and then the control mechanism re-controls the opening of the intake system;

S3. When the detection device detects again that the oil quantity in the oil chamber is lower than the alarm threshold B2, repeat the above operation of S2.

Preferably, in the step S2, the detection device is a vibration sensor or an acoustic emission sensor, and the method for the detection device to measure the thickness of the oil pad in the oil chamber is: before the diaphragm compressor starts to work, Through the method of reverse measurement, inject hydraulic oil into the oil chamber first, so that the oil quantity meets the minimum requirement for normal operation when the piston is at the bottom dead center. When the oil volume C2 is lower than the minimum oil volume C2, the diaphragm in the diaphragm compressor is prone to cylinder clattering. At this time, the vibration sensor detected by the detection device measures the vibration frequency of the cylinder body or The sound frequency measured by the acoustic emission sensor is the alarm limit value B2; then the oil volume in the oil chamber is adjusted to the alarm flow value C3 that can cause the phenomenon of continuous beating of cylinders, and the alarm flow value detected by the detection device The vibration frequency of the cylinder body measured by the vibration sensor or the sound frequency measured by the acoustic emission sensor is the alarm value B3. The above method establishes a correlation between the detection data of the detection device and the corresponding oil volume in the oil chamber Corresponding relationship.

The oil circuit system of the diaphragm compressor of the present invention can accurately know when replenishing the oil cavity through the oil replenishing flow meter arranged on the oil replenishing road and the oil overflow flow meter arranged on the oil overflowing road. The specific values of the oil replenishment amount A1 of the oil passage and the oil spillage A2 passing through the oil spillway, through the analysis and comparison of the oil spillage and the oil replenishment amount, the actual oil replenishment amount to the oil chamber can be accurately known, and then adjusted and Determine the specific oil replenishment amount for the next oil replenishment. The diaphragm compressor oil circuit system of the present invention can effectively solve the problem in the prior art that the oil chamber is supplemented with oil based on empirical values, resulting in too much or too little oil supplementation.

Description of drawings

Fig. 1 is a schematic diagram of a diaphragm compressor oil circuit system according to an embodiment of the present invention;

Explanation of reference signs

1 Cavity, 10 Diaphragm, 11 Oil chamber, 12 Air chamber, 2 Oil supply circuit, 21 Oil supply flow meter, 3 Oil overflow circuit, 30 Overflow valve, 31 Oil overflow flow meter, 4 Detection device, 5 Control mechanism , 6 booster pumps, 7 cylinders, 70 pistons, 8 fuel tanks.

Detailed ways

Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

One aspect of the present invention provides a diaphragm compressor oil circuit system, as shown in Figure 1, including an oil cavity 11 in the cavity 1 of the diaphragm cylinder body, an oil supply circuit 2 and an oil overflow circuit 3 respectively connected to the oil cavity 11 As well as an oil replenishment flowmeter 21 and an oil overflow flowmeter 31, the oil replenishment flowmeter 21 is arranged on the oil replenishment passage 2 for measuring the oil replenishment amount, and the oil overflow flowmeter 21 is arranged on the oil overflow passage 3 for measuring the oil overflow amount . A diaphragm chamber 1 is arranged in the diaphragm cylinder of the diaphragm compressor, and a diaphragm 10 is arranged in the diaphragm chamber 1 , and the diaphragm 10 divides the diaphragm chamber 1 into an oil chamber 11 and an air chamber 12 . When the diaphragm compressor sucks air, the piston 70 in the diaphragm compressor moves toward its bottom dead center, and the diaphragm 10 protrudes toward the side of the oil chamber 11 under the push of the gas in the air chamber 12, and the volume of the air chamber 12 becomes larger after suction ; When the diaphragm compressor compresses the gas, the piston 70 moves to its top dead center, and the diaphragm 10 protrudes to the side of the air chamber 12 under the push of the hydraulic oil in the oil chamber 11, and the diaphragm compressor passes through the piston 70 at its top dead center. And the reciprocating movement between the bottom dead center to complete the compression and absorption of gas. The diaphragm compressor periodically replenishes oil into the oil chamber 11 through the oil replenishment circuit 2 to prevent the phenomenon of the diaphragm flapping the cylinder caused by too little hydraulic oil. When refueling, the oil replenishment circuit 2 injects the minimum oil replenishment amount A0 into the oil chamber 11, and the oil replenishment flow meter 21 measures the oil replenishment amount A1=A0. After this oil replenishment, the diaphragm compressor compresses the gas, and when the piston When reaching the top dead center, the oil spill volume A2 measured by the oil spill flow meter 31,

When A2=0, it means that the amount of oil replenishment is insufficient. When replenishing oil for the second time, set the amount of replenishing oil in the oil replenishment circuit to A0+a. If A2 is still 0, when replenishing oil for the third time, continue to The oil replenishment amount is A0+2a, until A2>0, that is, the oil in the oil chamber 11 has been filled; the minimum oil replenishment amount A0 is specifically set according to the specific diaphragm compressor used, and the diaphragm compressor is generally operated After a period of time, the average value of A2-A1 is taken as the minimum oil replenishment amount A0, and the minimum oil replenishment amount A0=10ml in this embodiment. The value of a is also determined according to the diaphragm compressor and practical needs. Generally, the set value is relatively small to achieve the effect of gradually increasing the amount of oil added and prevent adding too much at one time. In this embodiment, a=1ml.

When A2=A1=A0, it means that there is no shortage of oil in the oil chamber 11, and the oil replenishment amount is maintained at A0 during the second oil replenishment;

When A2>A1, it means that the pressure in the air chamber 12 is too high, causing the original oil in the oil chamber 11 to overflow together. At this time, the oil in the oil chamber 11 is insufficient. , the control mechanism will control the oil replenishment amount during the second oil replenishment according to the difference between A2-A1. If A2-A1>A0, the oil replenishment amount during the second oil replenishment will be A2-A1; if A2 -A1<A0, the oil replenishment amount for the second oil replenishment is A0;

After the above-mentioned second oil replenishment, according to the oil spill amount A2 measured by the oil spill flowmeter 31 after the second oil replenishment, the above-mentioned method is repeatedly used to judge and analyze the oil spill amount A2, and according to the specific judgment result, the Specific instructions for the third oil replenishment; repeat the above steps for each subsequent oil replenishment.

Through the diaphragm compressor oil circuit system of the present invention, the oil replenishment flow meter 21 is set on the oil replenishment path 2 and the oil overflow flow meter 31 is arranged on the oil overflow path 3, so that each When replenishing oil, the specific values of the oil replenishment amount A1 through the oil replenishment path and the oil spillage A2 through the oil spill path can accurately know the actual oil replenishment amount to the oil cavity through the analysis and comparison of the oil overflow amount and the oil replenishment amount , and further adjust and determine the specific amount of oil replenishment for the next oil replenishment, which can effectively avoid the problem of too much or too little oil replenishment each time, and solve the problem of oil replenishment in the oil chamber through experience values in the prior art. Too much or too little oil replenishment may easily cause the problem of too little air intake or the cylinder flapping of the diaphragm.

Further, a booster pump 6 is provided on the oil supply passage 2 , and the oil charge flow meter 21 is located between the booster pump 6 and the oil chamber 11 . Quantitative replenishment of oil to the oil chamber 11 can be realized by controlling the booster pump 6 . One end of the oil supply circuit 2 is connected with the oil tank 8 , and the other end is connected with the oil chamber 11 , and one end of the oil overflow circuit 3 is connected with the oil tank 8 , and the other end is connected with the oil chamber 11 . An overflow valve 30 is arranged on the oil overflow passage 3 , and when the oil in the oil chamber is filled up during oil replenishment, excess hydraulic oil will flow out through the overflow valve 30 .

The oil circuit system of the diaphragm compressor includes a control mechanism 5, which is configured to receive information from the charge oil flow meter 21 and the overflow oil flow meter 31, and control the charge oil amount of the booster pump 6 according to the information. The control mechanism 5 can realize automatic control of oil replenishment. The oil replenishment flow meter 21 and the oil overflow flow meter 31 respectively measure the oil replenishment amount A1 and the oil overflow amount A2 to the control mechanism 5, and the control mechanism compares and judges the two data, and sends the booster pump an output signal according to the judgment result. 6 issue instructions.

Regardless of whether the diaphragm compressor is short of oil or not, it is necessary to periodically replenish the oil in the oil chamber 11 of the diaphragm compressor to avoid the occurrence of too little oil and the phenomenon of the diaphragm hitting the cylinder, but such frequent oil replenishment will cause Cause a certain waste of energy. In order to achieve effective energy saving, the oil circuit system of the diaphragm compressor includes a detection device 4 for detecting the thickness of the oil pad in the oil chamber 11 , and the detection device 4 is arranged on the outer wall of the cylinder 7 connected to the oil chamber 11 . The detection device 4 can detect the thickness of the oil pad in the oil chamber 11 in real time, and when it is found that the thickness of the oil pad is less than the alarm limit value, it can replenish oil in time to avoid frequent oil replenishment into the oil chamber 11 and at the same time avoid The appearance of too little oil. The thickness of the oil pad in the oil chamber mentioned here refers to the volume ratio of the oil volume in the oil chamber 11 in the diaphragm chamber 1 to the volume of the entire diaphragm chamber when the piston 70 reaches its bottom dead center when the diaphragm compressor is sucking air. Usually the optimum value is 25%. The above-mentioned warning threshold value B2 of oil pad thickness is set according to different types of diaphragm compressors. In this embodiment, the warning threshold value B2 of oil pad thickness is set at 15%.

Further, the detection device 4 is a vibration sensor or an acoustic emission sensor. vibration sensor. The detection device 4 measures the thickness of the oil pad in the oil chamber 11 by injecting hydraulic oil into the oil chamber 11 through the method of reverse measurement before the diaphragm compressor starts to work, so that the amount of oil meets the requirements when the piston is at the lower position. At the stop point, the oil volume in the oil chamber 11 is the minimum oil volume C2 that meets the normal working requirements, that is, when the oil volume is lower than the minimum oil volume C2, the diaphragm in the diaphragm compressor is prone to cylinder snapping. 4. The vibration frequency of the cylinder body detected by the vibration sensor or the sound frequency measured by the acoustic emission sensor is the alarm limit value B2; the oil volume in the oil chamber 11 can also be adjusted to make the oil volume meet when the piston is at the bottom stop. At this point, the amount of oil in the oil chamber 11 is 25% of the optimal value that meets the requirements of normal work, that is, the thickness of the oil pad is 25%. At this time, the vibration sensor detected by the detection device 4 measures the vibration frequency or sound of the cylinder body The sound frequency measured by the transmitting sensor is the normal value B1, and a corresponding relationship is established between the detection data of the detection device 4 and the corresponding thickness of the oil pad in the oil chamber 11 through the above method. When the diaphragm compressor works normally, the thickness of the oil pad can be determined through the detection data detected by the detection device 4 . According to the actual needs of the site through the above method, the data detected by the detection device 4 can also be gathered together for different oil pad thicknesses, and a data table corresponding to the detection data of the detection device and the thickness of the oil pad can be established to facilitate more accurate judgments Oil pad thickness. For example, in this implementation, the detection device 4 adopts a vibration sensor. When the vibration speed detected by the vibration sensor is 0.5-2 mm/s, it means that the thickness of the oil pad is between 25% and 15%, and oil replenishment is not required. When the vibration speed detected by the vibration sensor exceeds 2mm/s, it means that the thickness of the oil pad is less than 15%, and it is necessary to replenish oil in time.

Further, in order to realize all automatic control, the control mechanism 5 is configured to be able to receive the detection information of the detection device 4, and control the opening and closing of the booster pump 6 according to the detection information.

Another aspect of the present invention provides a method for replenishing oil in the oil circuit system of a diaphragm compressor. The method for replenishing oil in the oil circuit system of a diaphragm compressor is implemented by using the oil circuit system of the diaphragm compressor described above. The method for replenishing oil includes the following steps:

S1. Under the normal working state of the diaphragm compressor, the booster pump 6 periodically replenishes oil into the oil chamber 11 when the diaphragm compressor sucks air under the control of the control mechanism 5. When replenishing oil for the first time, through The control mechanism 5 controls the booster pump 6 to inject the minimum oil replenishment amount A0 into the oil chamber 11. The oil replenishment amount measured by the oil replenishment flowmeter 21 is A1=A0. After the oil replenishment, the diaphragm compressor compresses the gas. When the piston reaches the top dead center, the oil overflow flow meter 31 measures the oil spill A2, and the control mechanism judges and analyzes the oil spill A2 as follows, and gives specific instructions for the next oil replenishment according to the specific judgment results:

When the oil spillage A2=0 in the overflow oil passage 3 measured by the oil spill flow meter 31, then it shows that the replenishment quantity is insufficient. A0+a, if A2 is still 0, when replenishing oil for the third time, continue to control the oil replenishing amount of the booster pump 6 to A0+2a until A2>0, that is, the oil in the oil chamber 11 has been filled; the lowest The oil replenishment amount A0 is specifically set according to the specific diaphragm compressor used. Generally, after the diaphragm compressor has been running for a period of time, the average value of A2-A1 is taken as the minimum oil replenishment amount A0. The minimum oil replenishment amount in this embodiment Quantity A0 = 10ml. The value of a is also determined according to the diaphragm compressor and practical needs. Generally, the set value is relatively small to achieve the effect of gradually increasing the amount of oil added and prevent adding too much at one time. In this embodiment, a=1ml.

When the oil overflow amount A2=A1=A0 in the oil overflow passage 3 measured by the oil overflow flowmeter 31, it shows that there is no shortage of oil in the oil chamber 11, and the control mechanism 5 will maintain the oil during the second oil replenishment after receiving the instruction. The oil replenishment amount is A0;

When the amount of oil spilled in the oil spill passage 3 measured by the oil spill flow meter 31 is A2>A1, it means that the pressure in the air chamber 12 is too high, causing the original oil in the oil chamber 11 to overflow together. The oil quantity in chamber 11 is insufficient. During the second oil replenishment, the control mechanism will control the oil replenishment amount of booster pump 6 during the second oil replenishment according to the difference between A2-A1. If A2-A1 >A0, the oil replenishment amount for the second oil replenishment is A2-A1; if A2-A1<A0, the oil replenishment amount for the second oil replenishment is A0;

S2, after replenishing oil for the second time, according to the amount of oil spilled A2 measured by the oil spill flow meter 31 after the second replenishment of oil, the judging method in step S1 is used to determine and analyze the amount of oil spilled A2, and According to the specific judgment results, specific instructions for the third oil replenishment are given;

S3, when replenishing oil each time in the back, all according to the amount of oil spilled A2 measured by the oil spill flow meter 31 after its last oil replenishment, use the judgment method in step S1 to carry out judgment and analysis to the amount of oil spilled A2, And according to the specific judgment result, a specific instruction for the next oil replenishment is given.

Through the oil replenishment method of the diaphragm compressor oil circuit system of the present invention, when the diaphragm compressor is periodically replenished with oil, the oil replenishment flowmeter 21 and the overflow oil flowmeter 31 can accurately know that each oil replenishment passes through the oil replenishment circuit The specific values of the oil replenishment amount A1 and the oil spillage A2 through the oil spillway, through the analysis and comparison of the oil spillage and the oil replenishment amount, the actual oil replenishment amount to the oil chamber can be accurately known, and then adjusted and determined The specific amount of oil replenishment during each oil replenishment can effectively avoid the problem of too much or too little oil replenishment each time, and solve the problem of too much or too little oil replenishment in the oil chamber based on experience in the prior art It is easy to cause the problem of too little air intake or the diaphragm flapping the cylinder.

Another aspect of the present invention provides a method for replenishing oil in the oil circuit system of a diaphragm compressor. The method for replenishing oil in the oil circuit system of a diaphragm compressor is implemented by using the oil circuit system of the diaphragm compressor described above. The diaphragm compression method includes the following steps:

S1. In the normal working state of the diaphragm compressor, the detection device 4 detects in real time the oil volume value in the oil chamber 11 when the piston of the diaphragm compressor reaches the bottom dead center, that is, the thickness of the oil pad, and transmits the measured data to the control mechanism 5. When the thickness of the oil pad is greater than the threshold value B2 that meets the minimum oil quantity requirements under normal working conditions, the booster pump 6 is in the off state;

S2. When the thickness of the oil pad detected by the detection device 4 is lower than the alarm limit value B2 but higher than the alarm value B3 that causes the drum to be clapped, the control mechanism 5 controls the booster pump 6 to carry out air to the oil chamber 11 when the diaphragm compressor sucks air. Supplementing oil, when supplementing oil, the control mechanism 5 controls the booster pump 6 to inject the minimum supplementary oil quantity A0 into the oil chamber 11, and the supplementary quantity A1=A0 measured by the supplementary oil flowmeter 21, after this supplementary oil, The diaphragm compressor compresses the gas. When the piston reaches the top dead center, the oil overflow flow meter 31 measures the oil overflow A2 in the oil overflow passage 3. When A2≠0, it means that the oil in the oil chamber 11 has been replenished. full, the control mechanism closes the booster pump 6 at this time; when A2 = 0, it means that the first oil replenishment is insufficient, and oil replenishment needs to be performed again. During the second oil replenishment, the control mechanism controls the booster pump 6 The oil quantity is A0+a, if A2 is still 0, at the third oil replenishment, continue to control the oil replenishment amount of the booster pump 6 to A0+2a, after repeated oil replenishment until A2>0, that is, the oil chamber 11 The amount of oil inside has been replenished, and the control mechanism closes the booster pump 6 at this time; the minimum oil replenishment amount A0 is set according to the specific diaphragm compressor used. Generally, after the diaphragm compressor has been running for a period of time, A2- The average value of A1 is used as the minimum oil replenishment amount A0, and the minimum oil replenishment amount A0 in this embodiment is 10ml. The value of a is also determined according to the diaphragm compressor and practical needs. Generally, the set value is relatively small to achieve the effect of gradually increasing the amount of oil added and prevent adding too much at one time. In this embodiment, a=1ml.

When the thickness of the oil pad detected by the detection device 4 is less than or equal to the alarm value B3, the control mechanism 5 will control the booster pump 6 to replenish oil to the oil chamber in the above-mentioned manner. When the booster pump 6 replenishes oil for more than 5 seconds and the detection device 4 When the detected value is still less than or equal to the alarm value B3, the control mechanism 5 controls the intake system to close, and after the oil volume is filled, check the intake system and reduce the intake volume, and then the control mechanism 5 controls the intake system to open again.

S3. When the device 4 to be detected again detects that the oil quantity in the oil chamber 11 is lower than the alarm limit value B2, repeat the above operation of S2.

Further, in the step S2, the detection device 4 is a vibration sensor or an acoustic emission sensor, and the detection device 4 measures the thickness of the oil pad in the oil chamber 11 by means of a reverse measurement before the diaphragm compressor starts to work. First inject hydraulic oil into the oil chamber 11 to make the oil volume meet the minimum oil volume C2 that meets the normal working requirements when the piston is at the bottom dead center, that is, when the oil volume is lower than the minimum oil volume C2 , the diaphragm in the diaphragm compressor is prone to beating the cylinder. At this time, the vibration frequency of the cylinder measured by the vibration sensor detected by the detection device 4 or the sound frequency measured by the acoustic emission sensor is the alarm limit value B2 (that is, in the diaphragm When the compressor is working normally, when the detection device 4 detects that the value is the warning value B2 or lower than the warning value B2, it is necessary to replenish oil to the oil chamber 11 in time); adjust the amount of oil in the oil chamber 11 to be able to cause continuous pumping of the cylinder The alarm flow value C3 of the phenomenon, the vibration frequency of the cylinder body measured by the vibration sensor detected by the detection device 4 or the audio frequency measured by the acoustic emission sensor is the alarm value B3; the oil volume in the oil chamber 11 can also be adjusted to make Its oil quantity satisfies that when the piston is at the bottom dead center, the oil quantity in the oil chamber 11 is 25% of the optimal value meeting the normal work requirements, that is, the thickness of the oil pad is 25%. At this time, the vibration sensor detected by the detection device 4 The vibration frequency of the cylinder block or the sound frequency measured by the acoustic emission sensor is the normal value B1 (when the data detected by the detection device 4 is the normal value B1, it means that the thickness of the oil pad in the oil chamber 11 is 25% to meet the normal work requirements The optimal value of the oil chamber 11 does not need to be replenished). A corresponding relationship is established between the detection data of the detection device 4 and the thickness of the oil pad in the corresponding oil chamber 11 through the above method. When the diaphragm compressor works normally, the thickness of the oil pad can be determined through the detection data detected by the detection device 4 . According to the actual needs of the site through the above method, the data detected by the detection device 4 can also be gathered together for different oil pad thicknesses, and a data table corresponding to the detection data of the detection device and the thickness of the oil pad can be established to facilitate more accurate judgments Oil pad thickness. For example, in this implementation, the detection device 4 adopts a vibration sensor. When the vibration speed detected by the vibration sensor is 0.5-2 mm/s, it means that the thickness of the oil pad is between 25% and 15%, and oil replenishment is not required. When the vibration speed detected by the vibration sensor exceeds 2mm/s and is less than 10mm/s, it means that the thickness of the oil pad is lower than 15%, and oil needs to be replenished in time; when the vibration speed detected by the vibration sensor is greater than or equal to 10mm/s, it means that the The air pressure is too high in an instant, and the phenomenon of clattering occurs, and there is almost no oil film in the oil chamber. At this time, the control mechanism controls the booster pump to replenish oil in the oil chamber until the oil in the oil chamber reaches 25% of the cavity volume, but if the vibration If the value detected by the sensor is greater than 10mm/s and lasts for more than 5s, the control mechanism will issue a red alarm, and the control mechanism 5 will control the intake system to close. 5 Re-control the intake system opening.

Through the oil supply method of the diaphragm compressor oil circuit system of the present invention, the detection device 4 can detect the thickness of the oil pad in the oil chamber 11 in real time. Frequent periodic replenishment of oil into the oil chamber 11 not only solves the problem of too much or too little oil replenishment in the prior art when replenishing the oil chamber based on experience values, which may easily cause too little air intake or diaphragm failure. The problem of beating the cylinder also solves the problem of energy waste caused by frequent periodic replenishment of oil in the oil chamber in the prior art.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, however, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, including combinations of specific technical features in any suitable manner. In order to avoid unnecessary repetition, various possible combinations are not further described in the present invention. However, these simple modifications and combinations should also be regarded as the content disclosed by the present invention, and all belong to the protection scope of the present invention.

Claims (11)

1. A diaphragm compressor oil circuit system, characterized in that it comprises an oil cavity (11) in the cavity (1) of the diaphragm cylinder body, an oil supply circuit (2) communicated with the oil cavity (11) respectively And the oil overflow path (3) and the oil replenishment flow meter (21) and the oil overflow flow meter (31), the oil replenishment flow meter (21) is arranged on the oil replenishment path (2) for measuring the oil replenishment amount , the oil spill flowmeter (21) is arranged on the oil spill passage (3) for measuring the oil spill volume. 2. The diaphragm compressor oil circuit system according to claim 1, characterized in that a booster pump (6) is provided on the oil supply circuit (2), and the oil supply flowmeter (21) is located at the Between the booster pump (6) and the oil chamber (11). 3. The diaphragm compressor oil circuit system according to claim 2, characterized in that one end of the oil supply circuit (2) is connected to the oil tank (8), and the other end is connected to the oil chamber (11), so that One end of the oil spillway (3) is connected with the oil tank (8), and the other end is connected with the oil chamber (11). 4. The diaphragm compressor oil circuit system according to claim 3, characterized in that an overflow valve (30) is arranged on the oil overflow channel (3). 5. The diaphragm compressor oil circuit system according to claim 4, characterized in that, the diaphragm compressor oil circuit system comprises a control mechanism (5), and the control mechanism (5) is configured to be able to receive a charge oil flowmeter (21) and the information of the overflow oil flowmeter (31), and according to the information to control the replenishment amount of the booster pump (6). 6. The diaphragm compressor oil circuit system according to claim 5, characterized in that, the diaphragm compressor oil circuit system includes a detection device (4) for detecting the thickness of the oil pad in the oil chamber (11) , the detection device (4) is arranged on the outer wall of the cylinder (7) connected to the oil chamber (11). 7. The diaphragm compressor oil circuit system according to claim 6, characterized in that the detection device (4) is a vibration sensor or an acoustic emission sensor. 8. The diaphragm compressor oil circuit system according to claim 7, characterized in that the control mechanism (5) is configured to be able to receive the detection information of the detection device (4), and control the Describe the opening and closing of the booster pump (6). 9. A method for replenishing oil in the oil circuit system of a diaphragm compressor, characterized in that, the method for replenishing oil in the oil circuit system of the diaphragm compressor is performed by the oil circuit system of the diaphragm compressor described in claim 5, and the The oil replenishment method includes the following steps: S1. Under the normal working state of the diaphragm compressor, the booster pump (6) periodically pumps air into the oil chamber (11) under the control of the control mechanism (5) when the diaphragm compressor sucks air ) for oil replenishment. When replenishing oil for the first time, the booster pump (6) is controlled by the control mechanism (5) to inject the minimum oil replenishment amount A0 into the oil chamber (11), and the oil replenishment flow rate The oil replenishment amount A1=A0 measured by the meter (21), after this oil replenishment, the diaphragm compressor compresses the gas, and when the piston reaches the top dead center, the oil overflow meter (31) measures The amount of oil spilled A2 is obtained, and the control mechanism performs the following judgment and analysis on the amount of oil spilled A2, and gives specific instructions for the next oil replenishment according to the specific judgment results: When the oil overflow amount A2 in the oil overflow passage (3) measured by the oil overflow flow meter (31) = 0, it indicates that the replenishment amount is insufficient. The oil replenishment amount of the booster pump (6) is A0+a, if A2 is still 0, when replenishing oil for the third time, continue to control the oil replenishment amount of the booster pump (6) to be A0+2a until A2>0 means that the oil volume in the oil chamber (11) has been filled; When the amount of oil spilled in the oil spill passage (3) measured by the oil spill flowmeter (31) is A2=A1=A0, it means that there is no shortage of oil in the oil chamber (11), and the control mechanism (5) After receiving the instruction, the oil replenishment amount will be maintained at A0 during the second oil replenishment; When the amount of oil spilled in the oil spill passage (3) measured by the oil spill flowmeter (31) is A2>A1, it means that the pressure in the air chamber (12) is too large, causing the oil chamber (11 ) also overflows together, and the oil quantity in the oil chamber (11) is insufficient at this time. When replenishing oil for the second time, the control mechanism will control the The oil replenishment amount of the booster pump (6) during the second oil replenishment, if A2-A1>A0, then the oil replenishment amount during the second oil replenishment is A2-A1; if A2-A1<A0, then The oil replenishment amount during the second oil replenishment is A0; S2, after the second oil replenishment, according to the oil spill A2 measured by the oil spill flowmeter (31) after the second oil replenishment, use the judgment method described in step S1 to check the oil spill amount A2 conducts judgment analysis, and gives specific instructions for the third oil replenishment according to the specific judgment results; S3, when replenishing oil each time in the back, all according to the amount of oil spilled A2 measured by the oil spill flow meter (31) after its last oil replenishment, use the judging method described in step S1 to pair the oil spill The quantity A2 is judged and analyzed, and the specific instruction for the next oil replenishment is given according to the specific judgment result. 10. A method for replenishing oil in the oil circuit system of a diaphragm compressor, characterized in that the method for replenishing oil in the oil circuit system of the diaphragm compressor is performed by the oil circuit system of the diaphragm compressor described in claim 8, and the The method of diaphragm compression comprises the steps of: S1. Under the normal working condition of the diaphragm compressor, the detection device (4) detects in real time the oil volume value in the oil chamber (11) when the piston of the diaphragm compressor reaches the bottom dead center, that is, the thickness of the oil pad, And transmit the measured data to the control mechanism (5), when the thickness of the oil pad is greater than the alarm threshold B2 meeting the minimum oil volume requirement under the normal working condition, the booster pump (6) is in the closed state; S2. When the thickness of the oil pad detected by the detection device (4) is lower than the alarm limit value B2 but higher than the alarm value B3 causing cylinder clapping, the control mechanism (5) controls the booster The pump (6) replenishes oil to the oil chamber (11) when the diaphragm compressor sucks air, and when replenishing oil, the booster pump (6) is controlled by the control mechanism (5) to The oil chamber (11) is injected with the minimum oil replenishment amount A0, and the oil replenishment amount measured by the oil replenishment flow meter (21) is A1=A0. After this oil replenishment, the diaphragm compressor compresses the gas, and when the piston When reaching the top dead center, the oil spill volume A2 measured by the oil spill flowmeter (31), when A2≠0, indicates that the oil volume in the oil chamber (11) has been filled up, and at this time the control The mechanism closes the booster pump (6); when A2=0, it indicates that the first oil replenishment amount is insufficient, and oil replenishment needs to be performed again. During the second oil replenishment, the booster pump (6) is controlled by the control mechanism ) is A0+a, if A2 is still 0, when replenishing oil for the third time, continue to control the replenishment amount of the booster pump (6) to be A0+2a, after several times of replenishment until A2>0 means that the oil volume in the oil chamber (11) has been filled up, and at this time, the control mechanism closes the booster pump (6); When the thickness of the oil pad detected by the detection device (4) is less than or equal to the alarm value B3, the control mechanism (5) will control the booster pump (6) to pump When the booster pump (6) replenishes oil for more than 5 seconds and the value detected by the detection device (4) is still less than or equal to the alarm value B3, the control mechanism (5) controls The air system is closed, and after the oil volume is filled up, check the air intake system and reduce the air intake volume, and then the control mechanism (5) re-controls the opening of the air intake system; S3. When the detection device (4) detects again that the oil quantity in the oil chamber (11) is lower than the alarm limit value B2, repeat the above operation of S2. 11. The oil replenishing method of the diaphragm compressor oil circuit system according to claim 10, characterized in that, in the S2 step, the detection device (4) is a vibration sensor or an acoustic emission sensor, and the detection device (4) The method for measuring the thickness of the oil cushion in the oil chamber (11) is: before the diaphragm compressor starts to work, inject hydraulic oil into the oil chamber (11) by means of reverse measurement. , so that the oil quantity satisfies that when the piston is at the bottom dead center, the oil quantity in the oil chamber (11) is the minimum oil quantity C2 meeting the normal working requirements, that is, when it is lower than the minimum oil quantity C2 , the diaphragm in the diaphragm compressor is prone to beating the cylinder. At this time, the vibration frequency of the cylinder measured by the vibration sensor detected by the detection device (4) or the sound frequency measured by the acoustic emission sensor is The alarm limit value B2; then adjust the oil volume in the oil chamber (11) to the alarm flow value C3 that can cause the phenomenon of continuous beating cylinder, measured by the vibration sensor detected by the detection device (4) The vibration frequency of the cylinder block or the sound frequency measured by the acoustic emission sensor is the alarm value B3. The above method establishes a relationship between the detection data of the detection device (4) and the corresponding oil volume in the oil chamber (11). Corresponding relationship.