TW201610299A - Structure of slide valve position control for compressor - Google Patents

Abstract

This invention is a structure of slide valve position control for a compressor. The compressor is delineated into a low pressure region, a compressing region, and a high pressure region. A motor for driving a rotor is set in the low pressure region. The compressing region contains at least one group of rotors and a regulating slide valve. The high pressure region is provided with a hydraulic cylinder and a piston. The slide valve position control apparatus is made up of the hydraulic cylinder, the piston, the regulating slide valve, and a connection pipeline assembly. Multiple regulation channels which have various lengths are formed in a wall of the regulating slide valve. The connection pipeline assembly comprises: a main passage, an oil drain pipeline, a transport pipe, a first channel manifold, and a second channel manifold. The main passage is connected to the hydraulic cylinder. The transport pipe is connected to the main passage and is provided with a compressor and connected to an oil flow-in pipe. The first channel manifold and the second channel manifold are connected to the main passage to respectively correspond to the regulation channels. As such, the flow of oil is controlled to drive the piston so as to adjust the position of the slide valve.

Description

Compressor spool position control structure

The present invention relates to a compressor, and more particularly to a structure for adjusting the position control of a compressor spool valve that can adjust the movement of a spool valve in a simple manner.

Pressing, the hydraulic cylinder is a device capable of converting fluid pressure into linear mechanical force or motion, usually having a linear reciprocating motion of the movable member in the cylinder; and a movable member such as a piston, a piston rod, a plunger, and the like. The action is usually a linear motion of pushing or pulling. The hydraulic cylinder can be started and stopped accurately during the stroke; in addition, the hydraulic cylinder cooperates with other mechanical devices to perform the swinging or rotating motion.

At present, the compressors on the market are constantly changing according to the load demand. It is necessary to change the position of the spool to control the capacity generated when the compressor is running. Please refer to Figure 1 for the conventional adjustment slide valve to move to the first load. A schematic of the location. The spool position control device 1 is mainly composed of a hydraulic cylinder 10, a piston 12 and an adjusting slide valve 14. In order to control the piston 12 in the hydraulic cylinder 10, the adjusting spool 14 is actuated, and the hydraulic cylinder 10 is mainly disposed on the hydraulic cylinder 10. The main channel 100, the oil drain pipe 101, a first output pipe 102 and the second output pipe 104, the main channel 100 is mainly used for inputting oil, and the first output pipe 102 and the second output pipe 104 are respectively provided with a control switch 16, and then A plurality of oil drain holes 106 are formed in the side wall surface of the hydraulic cylinder 10, and the oil drain holes 106 are disposed in front and rear. The first output pipe 102 and the second output pipe 104 communicate with the drain hole 106, and pass through the first output pipe 102 and The front and rear positions of the second output pipe 104 can control the amount of oil, and the adjustment spool 14 must be moved to the first in response to the load demand. When the position is loaded, closing the control switch 16 on the first output pipe 102 and closing the control switch 16 on the second output pipe 104 cause the first output pipe 102 and the second output pipe 104 to be closed, so the oil will not be from the first An output pipe 102 or a second output pipe 104 is exhausted. At this time, the internal oil quantity of the hydraulic cylinder 10 is injected through the main passage 100, and the oil pushes the piston 12 to drive the regulating spool 14 to move the adjusting spool 14 to the right. Load location.

Referring to FIG. 2, it is a schematic diagram of the conventional adjustment spool 14 moving to the second loading position. When the adjustment spool 14 has to be moved from the first loading position to the second loading position in response to the load demand, the control switch 16 on the first output conduit 102 is closed and the control switch 16 on the second output conduit 104 is opened. The internal oil quantity of the pressure cylinder 10 is discharged through the second output pipe 104, and the oil will drive the piston 12 and the adjustment spool 14 to move to the left. When the piston 12 moves to the second output pipe 104, the oil cannot continue to be discharged, and the piston 12 stops. At the position of the second output conduit 104, the slide valve 14 is simultaneously moved to the left to the second loading position.

Please refer to FIG. 3, which is a schematic diagram of the conventional adjustment slide valve moving to the third loading position. When the load demand must move the adjustment spool 14 from the second loading position to the third loading position, the control switch 16 on the first output pipe 102 is opened, and at this time, the internal oil amount of the hydraulic cylinder 10 passes through the first output. The pipe 102 is discharged, and the oil will drive the piston 12 and the adjusting spool 14 to move to the left. When the piston 12 moves to the first output pipe 102, the oil cannot continue to be discharged, and the piston 12 stops at the position of the first output pipe 102 while adjusting The spool 14 is moved left to the third loading position.

Please refer to FIG. 4, which is a schematic diagram of the conventional adjustment slide valve moving to the first full discharge position. When the adjustment spool 14 has to be moved to the full discharge position when there is no load demand, the control switch 16 on the main passage 100 is closed and the control switch 16 on the drain line 101 is opened, at this time the oil inside the hydraulic cylinder 10 Will be completely discharged through the drain pipe 101, and the oil will drive the piston 12 and adjust The throttle valve 14 is moved to the left and the piston is moved to the bottom while the adjustment spool 14 is moved to the left to the fully discharged position.

In addition, the oil amount control switch 16 on the first output pipe 102 may be closed, and the oil amount control switch 16 on the second output pipe 104 may be closed by the control switch 16 on the main passage 100 and the drain pipe 101. The control switch 16 controls the amount of oil input to the hydraulic cylinder 10, thereby adjusting the position of the piston 12 and the adjustment spool 14.

In the foregoing manner, the oil drain hole 106 is drilled in the hydraulic cylinder and controlled through the oil hole position and the installed output pipe. Although the control can increase or decrease the compression volume or the compression ratio, the following problems are caused: The hydraulic cylinder must drill the oil drain hole, which increases the man-hour and cost of production. 2. The hole of the oil drain hole may have a burr or a rough surface when the hole is drilled, and the oil drain hole is located on the side wall surface of the hydraulic cylinder 10, which may cause the piston to wear and cause the adjustment mechanism to fail. 3. The oil system is complicated.

In view of the above-mentioned shortcomings, the inventor believes that it has the urgent need to improve, but also thinks about the idea of improving the invention, and consistently adheres to the excellent design concept, and improves the existing defects, and discusses it through multiple designs. The sub-correction improvement finally has the structure of the position control of the compressor spool of the present invention, and is a designer who fully meets the practical progress and industrial utilization.

The main purpose of the present invention is to respectively connect the main passage through the first passage branch and the second passage branch, and respectively correspond to the adjustment passages, and use the piston to adjust the position of the slide valve to change the compression volume or the compression ratio.

In order to achieve the above object, the present invention is a structure for controlling the position of a compressor spool, wherein the compressor defines a low pressure zone, a compression zone and a high pressure zone which are connected to each other, wherein a spool position control is arranged in the compressor. The valve position control device comprises: a hydraulic cylinder forming a stroke space, wherein a plurality of ports communicating with the stroke space are formed in a bottom wall of the hydraulic cylinder; a piston, the piston system is disposed in the stroke space and Connecting an adjustment slide valve, the adjustment slide valve defines an internal space, and at least one adjustment hole communicating with the internal space is formed on the wall surface thereof; and a communication pipe group including a main passage and an oil drain a pipe, a conveying pipe, and at least one channel branch pipe, wherein the main channel and the drain pipe are respectively connected to the port, and the conveying pipe communicates with the main channel and is disposed in the compressor, and the channel branch pipe communicates with the main channel The orifice is adjusted, wherein the adjustment spool is located in the compression zone, and the hydraulic cylinder and the piston are located in the high pressure zone.

According to an embodiment of the present invention, a plurality of oil quantity control switches are further included, and the oil quantity control switches are respectively disposed on the main passage, the drain pipe, the conveying pipe, and the channel branch pipe.

According to an embodiment of the invention, the adjustment aperture is divided into a long adjustment aperture and a short adjustment aperture, the long adjustment aperture being in communication with the channel branch, and the short adjustment aperture being in communication with the other of the channel branches.

According to an embodiment of the invention, the low pressure zone is provided with a motor, and at least one set of rotors is connected to the motor, and the rotor is located in the compression zone.

According to an embodiment of the invention, the channel branch pipe is composed of a first channel branch pipe and a second channel branch pipe, and corresponds to each of the adjusting holes.

The secondary purpose of the present invention is that the hydraulic cylinder does not need to be drilled with a drain hole, which can reduce the processing cost and increase the production capacity.

Another object of the present invention is that the hydraulic cylinder does not need to be drilled with a drain hole, thereby preventing the burrs generated during drilling from wearing the piston and causing adjustment failure.

Conventional component

1‧‧‧Spool valve position control equipment

10‧‧‧Hydraulic cylinder

100‧‧‧ main channel

101‧‧‧ drain pipe

102‧‧‧First output pipeline

104‧‧‧Second output pipeline

106‧‧‧ drain hole

12‧‧‧Piston

14‧‧‧Adjustment slide valve

16‧‧‧Control switch

Inventive component

2‧‧‧Compressor

20‧‧‧Low-pressure zone

21‧‧‧Compressed area

26‧‧‧Motor

28‧‧‧Spool valve position control equipment

280‧‧‧Hydraulic cylinder

2800‧‧‧ stroke space

2802‧‧‧ mouth

282‧‧‧Piston

284‧‧‧Adjustment slide valve

2840‧‧‧Internal space

2842‧‧‧Adjustment tunnel

2842L‧‧‧Long adjustment tunnel

2842S‧‧‧Short adjustment tunnel

286‧‧‧Connected Pipe Group

2860‧‧‧Main channel

2861‧‧‧Drainage pipeline

2862‧‧‧Transportation pipeline

2864‧‧‧First channel branch

22‧‧‧High pressure zone

24‧‧‧Rotor

2866‧‧‧Second channel branch

3‧‧‧ Oil quantity control switch

Figure 1 is a schematic view of a conventional adjustment spool moving to a first loading position.

Figure 2 is a schematic view of a conventional adjustment spool moving to a second loading position.

Figure 3 is a schematic view of a conventional adjustment spool moving to a third loading position.

Figure 4 is a schematic view of a conventional adjustment spool moving to a fully bleed position.

Figure 5 is a schematic cross-sectional view of the compressor of the present invention.

6 is a schematic view showing the first loading position of the slide valve position control device of the present invention.

Figure 7 is a schematic view showing the second loading position of the slide valve position control device of the present invention.

Figure 8 is a schematic view showing the third loading position of the slide valve position control device of the present invention.

Figure 9 is a schematic view showing the state of the complete discharge position of the spool position control device of the present invention.

The other embodiments of the present invention will be readily understood by those skilled in the art from this disclosure.

The structures, proportions, sizes, etc. shown in the drawings of the present specification are only used to cope with the contents disclosed in the specification for understanding and reading by those skilled in the art, and are not used. In order to limit the conditions that can be implemented by the present invention, it is not technically significant, and any modification of the structure, change of the proportional relationship or adjustment of the size can be achieved without affecting the effects and the achievable purposes of the present invention. All should still fall within the scope of the technical content disclosed in the present invention. In the meantime, the terms "a", "an", "the" and "the" are used in the description, and are not intended to limit the scope of the invention. Adjustments, where there is no material change, are considered to be within the scope of the invention.

Please refer to FIG. 5 and FIG. 6 , which are schematic cross-sectional structures of the compressor of the present invention. And is a schematic diagram of the first loading position of the slide valve position control device of the present invention. The present invention is a compressor spool position control structure. The compressor 2 mainly has a low pressure zone 20, a compression zone 21 and a high pressure zone 22, wherein the low pressure zone 20 is provided with a motor 26, and at least one set of rotors is connected to the motor 26. 24, and the rotor 24 is located in the compression zone 21. The spool position control device 28 is mainly composed of a hydraulic cylinder 280, a piston 282, an adjustment spool 284 and a communication pipe group 286. The hydraulic cylinder 280 forms a stroke space 2800 and forms a stroke space with the bottom wall thereof. 2800 is connected to the opening 2802, and the piston 282 is disposed in the stroke space 2800 and is connected to an adjustment spool 284. The adjustment spool 284 defines an internal space 2840, and the wall surface is formed with a plurality of different lengths and the internal space 2840. The adjustment hole 2842 is divided into a long adjustment hole 2842L and a short adjustment hole 2842S, and the long adjustment hole 2842L and the short adjustment hole 2842S are arranged side by side, wherein the adjustment spool 284 is located in the compression zone 21, and the oil The pressure cylinder 280 and the piston 282 are located in the high pressure zone 22.

Furthermore, the communication pipe group 286 mainly includes a main channel 2860, a drain pipe 2861, a transfer pipe 2862 (high pressure end), a first channel branch pipe 2864 (low voltage end), and a second channel branch pipe 2866 (low voltage end), wherein the main channel 2860 and the drain pipe 2861 are connected to the port 2802, and the conveying pipe 2862 communicates with the main channel 2860 and is disposed in the compressor 2 and can be connected to the oil pipe, and the other first channel branch The tube 2864 and the second channel branch 2866 respectively communicate with the main channel 2860. The long adjustment channel 2842L in the foregoing is in communication with the first channel branch 2864, and the short adjustment channel 2842S is in communication with the second channel branch 2866.

In addition, the oil pipeline control switch 3 is respectively disposed in the conveying pipe 2862, the first channel branch pipe 2864 and the second channel branch pipe 2866, and is mainly used for controlling the oil delivery amount or the closed state and the opening state.

Referring to FIG. 6 to FIG. 9 , it is a schematic diagram of a first loading position of a slide valve position control device, a second loading position of a slide valve position control device, a third loading position diagram of a slide valve position control device, and a slide valve. A schematic diagram of the state of the complete discharge position of the position control device. In Figure 6, when the adjustment spool 284 has to be moved to the first loading position in response to the load demand, the oil amount control switch 3 installed in the delivery pipe 2862 is opened at this time, and the first channel branch pipe 2864 and the second channel branch pipe 2866 are The oil quantity control switch 3 has to be closed, and the oil will enter the inside of the hydraulic cylinder 280 along the main passage 2860, and the oil will push the piston 282 to drive the adjusting spool 284 to move the adjusting spool 284 to the first loading position. .

When the adjustment spool 284 has to be moved from the first loading position to the second loading position in response to the load demand, as can be seen from FIG. 7, the oil amount control switch 3 on the second passage branch 2866 is opened, and the first passage branch 2864 is The oil quantity control switch 3 is closed, and the short adjustment hole 2842S is in communication with the second channel branch pipe 2866. At this time, the oil in the oil pressure cylinder 280 flows to the second channel branch pipe 2866 along the main channel 2860 and passes through the interior of the adjustment spool valve 284. The space 2840 is discharged, (the piston 282 moves synchronously to the left), and when the second passage branch 2866 exceeds the short adjustment passage 2842S, the oil cannot continue to be discharged, at which time the piston 282 and the adjustment spool 284 stay in the second loading position.

The adjustment spool 284 must be moved from the second loading position to the first in response to the load demand. In the three loading position, as can be seen from FIG. 8, the oil quantity control switch 3 on the second channel branch pipe 2866 is closed, the oil quantity control switch 3 on the first channel branch pipe 2864 is opened, the long adjustment hole 2842L and the first channel branch pipe 2864 In communication, the oil in the hydraulic cylinder 280 flows to the first passage branch 2864 along the main passage 2860 and is discharged through the internal space 2840 of the adjustment spool 284 (the piston 282 moves synchronously to the left) as the first passage. The branch pipe 2864 is beyond the long adjustment hole 2842L, and the oil cannot continue to be discharged. At this time, the piston 282 and the adjustment spool 284 stay in the third loading position.

When the adjustment spool 284 has to be moved to the full discharge position when no load is required, it can be seen from FIG. 9 that the oil amount control switch 3 on the delivery pipe 2862 is closed, and the oil amount control switch 3 on the drain pipe 2861 is opened. Therefore, the oil will completely discharge with the main passage 2860 to the drain pipe 2861, and the oil will drive the piston 282 and the adjusting spool 284 to move to the left, the internal pressure reaches the balance piston 282 moves to the left to the bottom, and the spool is adjusted. 284 Move left to the full discharge position.

In addition, the oil quantity control switch 3 on the first channel branch pipe 2864 can also be closed, and the oil quantity control switch 3 on the second channel branch pipe 2866 can be closed, by the oil quantity control switch 3 and the oil drain pipe 2861 on the conveying pipe 2862. The upper oil amount control switch 3 controls the amount of oil input into the hydraulic cylinder 280, thereby adjusting the position of the piston 282 and the adjustment spool 284.

As can be clearly seen from the above, the present invention communicates with the main channel 2860 through the first channel branch 2864 and the second channel branch 2866, respectively, and corresponding to the adjustment holes 2842, thereby controlling the flow of oil to drive the piston 282 and then adjusting. Slide valve 284 position. In addition, the foregoing various loading and unloading can be changed according to actual operational requirements to different proportions and positions.

The adjustment tunnel and the channel branch pipe in the foregoing must correspond to each other. Therefore, the number of applications and the length of the adjustment tunnel need to be changed according to actual needs. The present invention mainly adopts two adjustment tunnels and two-channel branch pipes as main embodiments.

The above embodiments are merely illustrative of the principles of the invention and its effects, and are not intended to limit the invention. Any of the above-described embodiments may be modified by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of protection of the present invention should be as listed in the scope of the patent application described later.

280‧‧‧Hydraulic cylinder

282‧‧‧Piston

284‧‧‧Adjustment slide valve

2840‧‧‧Internal space

2842L‧‧‧Long adjustment tunnel

2842S‧‧‧Short adjustment tunnel

2860‧‧‧Main channel

2862‧‧‧Transportation pipeline

2864‧‧‧First channel branch

2866‧‧‧Second channel branch

3‧‧‧ Oil quantity control switch

Claims (5)

A compressor spool position control structure, wherein the compressor defines a low pressure zone, a compression zone and a high pressure zone connected to each other, wherein a spool position control device is disposed in the compressor, the spool position control device The utility model comprises: a hydraulic cylinder forming a one-stroke space, wherein a plurality of ports communicating with the stroke space are formed in a bottom wall of the hydraulic cylinder; a piston, the piston system is disposed in the stroke space and connected to an adjusting slide valve, the adjusting The spool valve defines an inner space, and at least one adjusting hole communicating with the inner space is formed on the wall surface thereof; and a communication pipe group including a main channel, a drain pipe, a conveying pipe, and at least one a passage branch pipe, wherein the main passage and the drain pipe are respectively connected to the through port, and the transfer pipe communicates with the main passage and is disposed in the compressor, and the passage branch pipe communicates with the main passage and correspondingly adjusts the tunnel, wherein The adjustment spool is located in the compression zone, and the hydraulic cylinder and the piston are located in the high pressure zone. The structure of the compressor spool position control according to claim 1, further comprising a plurality of oil quantity control switches, wherein the oil quantity control switches are respectively disposed on the main passage, the drain line, the conveying pipeline and the Channel branch pipe. The structure of the position control of the compressor spool according to claim 1, wherein the adjustment hole is divided into a long adjustment hole and a short adjustment hole, and the long adjustment hole communicates with the channel branch, and the short adjustment hole and the other One of the channel branches is connected. The structure of the compressor spool position control according to claim 1, wherein the low pressure zone is provided with a motor, and at least one set of rotors is connected to the motor, and the rotor is located in the compression zone. The structure of the position control of the compressor spool according to the first aspect of the patent application, wherein the passage The branch pipe is composed of a first channel branch pipe and a second channel branch pipe, and corresponds to each of the adjusting holes.