CN120759819A - An externally controlled ultra-high pressure proportional pressure regulating valve - Google Patents
An externally controlled ultra-high pressure proportional pressure regulating valveInfo
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- CN120759819A CN120759819A CN202511273525.7A CN202511273525A CN120759819A CN 120759819 A CN120759819 A CN 120759819A CN 202511273525 A CN202511273525 A CN 202511273525A CN 120759819 A CN120759819 A CN 120759819A
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Abstract
本发明公开一种外控式超高压比例调压阀，低压油液进入比例溢流阀进口，由比例溢流阀控制低压系统压力，低压侧压力油经稳压阻尼及单向阀作用于液控溢流阀柱塞控制腔，柱塞产生的液压推动力通过碟簧传递至溢流阀钢球，当液控溢流阀进口超高压压力乘以钢球作用面积的力等于柱塞推动力时，溢流阀钢球打开开始溢流，通过调节低压系统比例溢流阀压力即可控制超高压系统的溢流压力。外控式超高压比例调压阀可用于200MPa以上液压系统的压力调节，可当作超高压液压系统比例溢流阀使用。通过配置外控式超高压比例调压阀两辅助油口的液压回路，可以实现超高压系统的压力上升单向比例调节功能、压力卸荷功能、压力上升/下降双向比例调节功能。
The present invention discloses an externally controlled ultra-high pressure proportional pressure regulating valve. Low-pressure oil enters the inlet of the proportional relief valve, and the proportional relief valve controls the low-pressure system pressure. The low-pressure side pressure oil acts on the hydraulic control relief valve plunger control chamber through the pressure-stabilizing damping and the one-way valve. The hydraulic driving force generated by the plunger is transmitted to the relief valve steel ball through the disc spring. When the ultra-high pressure pressure at the inlet of the hydraulic control relief valve multiplied by the force of the steel ball's effective area equals the plunger driving force, the relief valve steel ball opens and begins to overflow. By adjusting the pressure of the low-pressure system proportional relief valve, the overflow pressure of the ultra-high pressure system can be controlled. The externally controlled ultra-high pressure proportional pressure regulating valve can be used for pressure regulation of hydraulic systems above 200MPa and can be used as an ultra-high pressure hydraulic system proportional relief valve. By configuring the hydraulic circuit with two auxiliary oil ports of the externally controlled ultra-high pressure proportional pressure regulating valve, the pressure rise one-way proportional regulation function, the pressure unloading function, and the pressure rise/fall two-way proportional regulation function of the ultra-high pressure system can be realized.
Description
Technical Field
The invention relates to the field of hydraulic transmission, in particular to an external control type ultrahigh pressure proportional pressure regulating valve.
Background
The current maximum pressure of the ultra-high pressure hydraulic system can reach more than 200Mpa, and in order to control the pressure of the ultra-high pressure hydraulic system, a pressure regulating valve is required to be arranged to be used as an overflow valve or a safety valve.
When the ultra-high pressure hydraulic system uses the overflow valve, because the system pressure is up to 200Mpa, the force acting on the steel ball or needle valve core of the overflow valve is above 600N, which is far greater than the thrust which can be output by the proportional electromagnet, therefore, the ultra-high pressure regulating valve is manually regulated, and the thrust is generated by compressing the disc spring through the screw.
In an ultrahigh pressure hydraulic system, the requirement of proportional adjustment of the system pressure exists, but the current ultrahigh pressure overflow valve only supports manual adjustment to a fixed value and cannot meet the system requirement.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an external control type ultrahigh pressure proportional pressure regulating valve which can be used for proportionally regulating the pressure of an ultrahigh pressure hydraulic system with the grade of 200 Mpa.
The aim of the invention is achieved by the following technical scheme:
The external control type ultrahigh pressure proportional pressure regulating valve comprises a proportional overflow valve, a pressure stabilizing damping valve, a one-way valve, a hydraulic control overflow valve, an integrated valve block and a plug, wherein the external control type ultrahigh pressure proportional pressure regulating valve is a tubular connecting valve, and an oil port comprises a low pressure side oil inlet P1 port and an oil return port T1 port, a high pressure side oil inlet P2 and an oil return port T2, a first auxiliary oil port C1 port and a second auxiliary oil port C2 port.
The proportional overflow valve is of a cartridge valve structure and comprises a proportional electromagnet, a conical valve core, a circular valve seat and a proportional valve sealing ring. The proportional electromagnet is provided with a bolt hole, is fixed with the integrated valve block through a bolt, and is sealed through the proportional valve sealing ring. The cone valve core and the circular valve seat are installed in an internal vertical flow channel of the integrated valve block, the circular valve seat and the flow channel are in interference fit, and the cone valve core is in tangential fit with an inner hole of the circular valve seat under the thrust action of the proportional electromagnet. The oil inlet of the proportional overflow valve is communicated with the low-pressure oil inlet P1, the oil return port of the cone valve core cavity is communicated with the low-pressure oil return port T1, and the pressure of the low-pressure side P1 port can be regulated by regulating the current of the proportional electromagnet.
The pressure stabilizing damping is a thread fixed damping and is arranged in a third horizontal flow passage of the integrated valve block, oil ports on two sides of the pressure stabilizing damping are respectively communicated with a low pressure side oil inlet P1 port and a first auxiliary oil port C1 port, and the throttling effect on the pressure stabilizing damping can stabilize the pressure of the C1 port.
The one-way valve comprises a one-way steel ball, a steel ball base, a return spring and a spring support, wherein the one-way steel ball is installed in an inner flow channel of the integrated valve block, the steel ball base is used for supporting the one-way steel ball, the return spring is installed between the steel ball base and the spring support, the spring support is used for compressing the return spring to compress the steel ball, and the one-way valve can enable oil liquid in a first auxiliary oil port C1 to flow in a one-way mode to a second auxiliary oil port C2.
The hydraulic control overflow valve is of a plug-in type structure and comprises an overflow valve body, a spring support, an overflow steel ball, an overflow valve seat, a plunger, a disc spring and an overflow valve sealing ring. The oil inlet of the hydraulic control overflow valve is communicated with the high-pressure side oil inlet P2, the oil return port is communicated with the high-pressure side oil return port T2, and the oil in the plunger action cavity is communicated with the C2.
Further, the overflow valve body is provided with external threads, and the external threads are connected with the internal threads on the integrated valve block in a plug-in mode. The overflow valve seat is in interference fit with the overflow valve body, the overflow steel ball is installed in the inner hole of the overflow valve seat and is in tangential fit with a taper hole in the overflow valve seat, the spring support is installed in the inner hole of the overflow valve seat, the spherical concave surface on the upper part is tightly pressed with the overflow steel ball, the plunger is installed in the inner hole at the bottom of the overflow valve body, and the disc spring is installed between the spring support and the plunger and is used for transmitting acting force on the plunger to the spring support and the overflow steel ball. By tightening the overflow valve body, the conical surface at the top of the overflow valve seat and the conical inner hole in the integrated valve block are tightly pressed for conical hard sealing, so that the reliable sealing between the high-pressure side oil inlet P2 and the oil return port T2 can be ensured when the pressure is higher than 200 MPa.
The integrated valve block is provided with a first horizontal flow passage on the left side surface and is coaxially communicated with a low-pressure oil inlet P1, a second horizontal flow passage on the right side surface, a third horizontal flow passage and a fourth horizontal flow passage on the left side surface and is coaxially communicated with a second auxiliary oil inlet C2, a fifth horizontal flow passage on the right side surface, and a first inclined flow passage on the left side surface and is communicated with a low-pressure oil return port T1.
Further, the integrated valve block is provided with a first vertical flow channel on the lower side surface, and is provided with a second vertical flow channel on the upper side surface and is coaxial with the first vertical flow channel.
Further, the integrated valve block is provided with a first parallel flow passage on the front face and is coaxially communicated with the first auxiliary oil port C2, a second parallel flow passage on the front face and is coaxially communicated with the high-pressure oil return port T2, a third parallel flow passage on the front face and is coaxially communicated with the high-pressure oil inlet port P2, a fourth parallel flow passage on the front face, and a fifth parallel flow passage on the back face and is coaxial with the first parallel flow passage.
Further, the first horizontal runner is in cross communication with the first vertical runner and the fourth horizontal runner, the second horizontal runner is in cross communication with the second parallel runner, the third horizontal runner is in cross communication with the first parallel runner and the fourth parallel runner, the fourth horizontal runner is in cross communication with the fifth parallel runner, the fifth parallel runner is in cross communication with the fifth parallel runner, the first inclined runner is in cross communication with the second vertical runner, the first vertical runner is in cross communication with a low-pressure oil inlet P1, and the second vertical runner is in cross communication with a low-pressure oil return T1.
The number of the screw plugs is 6, the first screw plug external screw thread is matched with the first vertical runner internal screw thread, the second screw plug external screw thread is matched with the fourth parallel runner internal screw thread, the third screw plug external screw thread is matched with the second horizontal runner internal screw thread, the fourth screw plug external screw thread is matched with the fifth parallel runner internal screw thread, the fifth screw plug external screw thread is matched with the third horizontal runner internal screw thread, and the sixth screw plug external screw thread is matched with the fifth parallel runner internal screw thread.
The pressure rising unidirectional proportion regulating function of the ultrahigh-pressure hydraulic system can be realized by the proportion regulating valve, wherein the first auxiliary oil port C1 and the second auxiliary oil port C2 are plugged through bolts, the port P1 at the low pressure side is connected with the outlet of the low-pressure pump, the port T1 at the oil return side is connected with the oil tank, the port P2 at the high pressure side is connected with the outlet of the ultrahigh-pressure pump, the port T2 at the oil return side is connected with the oil tank, the pressure of the outlet of the low-pressure pump is regulated by the proportion overflow valve, oil liquid at the outlet of the low-pressure pump enters the plunger cavity at the end face of the plunger of the hydraulic overflow valve through the pressure stabilizing damping and one-way valve, the acting force on the plunger is transmitted to the overflow steel ball through the spring support, the pressure at the outlet of the ultrahigh-pressure pump acts on the opening direction of the overflow steel ball, the sectional area of the overflow steel ball and the overflow valve seat is the opening force of the hydraulic overflow valve, the plunger cavity pressure is multiplied by the area of the plunger end is the thrust of the hydraulic overflow valve, and when the opening force is larger than the thrust force, and the overflow steel ball is opened, so that the pressure of the hydraulic overflow valve does not basically change. The damping effect of steady voltage damping can reduce the pressure fluctuation numerical value of C1 mouth when P1 mouth appears pressure fluctuation, and in the control P1 mouth pressure rising process, the fluid of P1 mouth can freely pass through the check valve gets into the plunger chamber of hydraulically controlled overflow valve, P2 mouth overflow pressure can increase along with the pressure increase of P1 mouth, in the P1 mouth pressure decline in-process, because the check valve can reverse closure keep pressure, the plunger chamber pressure of hydraulically controlled overflow valve can not descend, and P2 mouth can not produce the change because of P1 mouth pressure decline. When the pressure of the C1 port fluctuates, the unidirectional transmission pressure characteristic of the check valve can reduce the pressure fluctuation amplitude of the plunger cavity. The sectional area of the plunger is 20 times of the tangential area of the steel balls, so that the pressure of the ultra-high pressure pump can be controlled to be changed within 0-200MPa by changing the low pressure pump within 0-10MPa, and the proportion adjustment of the pressure rising of the ultra-high pressure system can be realized by adjusting the current increase on the proportion overflow valve.
Furthermore, the proportional pressure regulating valve for the ultrahigh pressure hydraulic system can realize the pressure unloading function of the ultrahigh pressure system, wherein the first auxiliary oil port C1 is plugged through a plug, the second auxiliary oil port C2 is connected with a normally-off two-position two-way electromagnetic directional valve, after the electromagnetic directional valve is powered on, the plunger cavity oil of the hydraulic control overflow valve is quickly decompressed to an oil tank through the electromagnetic directional valve, the steel ball of the hydraulic control overflow valve is opened, and the pressure of the high-pressure inlet P2 is unloaded.
Furthermore, the proportional pressure regulating valve for the ultrahigh pressure hydraulic system can realize the bidirectional proportional regulation function of pressure rising/falling of the ultrahigh pressure system, wherein the first auxiliary oil port C1 and the second auxiliary oil port C2 are respectively connected with oil ports at two ends of the normally-off two-position two-way electromagnetic directional valve, and the proportional regulation of the pressure rising of the ultrahigh pressure system can be realized when the electromagnetic directional valve is not powered. When the pressure of the P1 port of the low pressure port is controlled by the proportional overflow valve to be reduced, after the electromagnetic directional valve is electrified, the plunger cavity oil of the hydraulic control overflow valve can be directly connected with the C1 port through the electromagnetic directional valve, the one-way valve does not act, the pressure of the plunger cavity can be reduced along with the pressure reduction of the P1 port, and the overflow pressure of the P2 port is reduced in proportion to the pressure reduction of the P1 port, so that the proportional adjustment of the pressure reduction of an ultrahigh pressure system is realized.
The beneficial effects of the invention are as follows:
1. The invention can be used for an ultra-high pressure hydraulic system with the grade of 200MPa, and realizes the proportional adjustment of the system pressure;
2. the invention adopts an integrated design, has compact structure and is easy to install and maintain;
3. the invention can realize the adjustment of high pressure by controlling low pressure;
4. according to the external control type structure, only a single hydraulic control overflow valve is arranged at the high-pressure side, and leakage at the high-pressure side is small.
Drawings
Fig. 1 is a schematic diagram of an external control type ultrahigh pressure proportional pressure regulating valve according to an embodiment of the present invention.
Fig. 2 is a front view of an external control type ultra-high pressure proportional pressure regulating valve according to an embodiment of the present invention.
Fig. 3 is a right side view of an external control type ultra-high pressure proportional pressure regulating valve according to an embodiment of the present invention.
Fig. 4 is a cross-sectional view A-A of fig. 2.
Fig. 5 is a B-B cross-sectional view of fig. 3.
Fig. 6 is a schematic diagram of an ultrahigh pressure rising unidirectional proportional adjustment system in accordance with an embodiment of the present invention.
Fig. 7 is a schematic diagram of a pressure-rising unidirectional proportional adjustment system with unloading function according to an embodiment of the present invention.
Fig. 8 is a schematic diagram of an ultrahigh pressure rising/falling bidirectional proportional adjustment system according to an embodiment of the present invention.
In the figure, 1 is a proportional overflow valve, 1.1 is a proportional electromagnet, 1.2 is a conical valve core, 1.3 is a circular valve seat, 1.4 is a proportional valve sealing ring, 2 is a pressure stabilizing damper, 3 is a one-way valve, 3.1 is a one-way steel ball, 3.2 is a steel ball base, 3.3 is a return spring, 3.4 is a spring support, 4 is a hydraulically-controlled overflow valve, 4.1 is an overflow valve body, 4.2 is a spring support, 4.3 is an overflow steel ball, 4.4 is an overflow valve seat, 4.5 is a plunger, 4.6 is a disc spring, 4.7 is an overflow valve sealing ring, 5 is an integrated valve block, 5.1 is a first horizontal channel, 5.2 is a second horizontal channel, 5.3 is a third horizontal channel, 5.4 is a fourth horizontal channel, 5.5 is a fifth horizontal channel, 5.6 is a first inclined channel, 5.7 is a first vertical channel, 5.8 is a second vertical channel, 5.9 is a first parallel channel, 5.10 is a third parallel channel, 5.11.6 is a third parallel channel, 6.6.6 is a plug, 6.6, and 5.6 is a plug.
Detailed Description
The objects and effects of the present invention will become more apparent from the following detailed description of the preferred embodiments and the accompanying drawings, it being understood that the specific embodiments described herein are merely illustrative of the invention and not limiting thereof.
As shown in fig. 1,2 and 3, the proportional relief valve 1, the pressure stabilizing damping 2, the one-way valve 3, the hydraulic relief valve 4, the integrated valve block 5 and the plug 6 for the proportional pressure regulating valve for the ultra-high pressure hydraulic system in the embodiment. The proportional pressure regulating valve for the ultrahigh pressure hydraulic system of the embodiment is a pipe type connecting valve and comprises a low pressure side oil inlet P1 port and an oil return port T1 port, a high pressure side oil inlet P2 and an oil return port T2, a first auxiliary oil port C1 port and a second auxiliary oil port C2 port.
As shown in FIG. 4, the proportional overflow valve 1 is of a cartridge valve structure and comprises a proportional electromagnet 1.1, a cone valve core 1.2, a circular valve seat 1.3 and a proportional valve sealing ring 1.4. The proportional electromagnet 1.1 is provided with a bolt hole, is fixed with the integrated valve block through a bolt, and is sealed through a proportional valve sealing ring (4). The cone valve core 1.2 is arranged in a second vertical flow passage 5.8 of the integrated valve block 5, the circular valve seat 1.3 is arranged in a first vertical flow passage 5.7, an interference fit mode is adopted, and the cone valve core 1.2 is in tangential fit with an inner hole of the circular valve seat 1.3 under the thrust action of the proportion electromagnet. The oil inlet of the proportional overflow valve 1 is communicated with the low-pressure oil inlet P1, the oil return port of the cone valve core cavity is communicated with the low-pressure oil return port T1, and the pressure of the port P1 at the low pressure side can be regulated by regulating the current of the proportional electromagnet 1.1.
As shown in fig. 5, the pressure stabilizing damper 2 is a screw thread fixed damper, and is installed in the third horizontal flow channel 5.3 of the integrated valve block 5, the oil ports at two sides of the pressure stabilizing damper 2 are respectively communicated with the low pressure side oil port P1 and the first auxiliary oil port C, and the throttling effect on the pressure stabilizing damper 2 can stabilize the pressure of the C1 port.
As shown in fig. 5, the check valve 3 includes a unidirectional steel ball 3.1, a steel ball base 3.2, a return spring 3.3, and a spring support 3.4, where the unidirectional steel ball 3.1 is installed in a fifth parallel flow channel 5.13 of the integrated valve block 5 and is tangential to the first parallel flow channel 5.3, the steel ball base 3.2 is used to support the unidirectional steel ball 3.1, the return spring 3.3 is installed between the steel ball base 3.2 and the spring support 3.4, and the spring support 3.4 is used to compress the return spring to compress the steel ball 3.1, and the check valve 3 can make the first auxiliary oil port C1 port oil flow unidirectionally to the second auxiliary oil port C2, and can play a role in maintaining pressure at the C2 port.
As shown in fig. 5, the hydraulic control overflow valve 4 is in a plug-in type structure and comprises an overflow valve body 4.1, a spring support 4.2, an overflow steel ball 4.3 and an overflow valve seat 4.4), a plunger 4.5, a disc spring 4.6 and an overflow valve sealing ring 4.7. The oil inlet of the hydraulic control overflow valve 3 is communicated with the high-pressure side oil inlet P2, the oil return port is communicated with the high-pressure side oil return port T2, and the oil in the plunger action cavity is communicated with the C2. The overflow valve body 4.1 is provided with external threads, and is connected with internal threads on the integrated valve block 5 in a plug-in connection way. The overflow valve seat 4.4 is in interference fit with the overflow valve body 4.1, the overflow steel ball 4.3 is installed in an inner hole of the overflow valve seat 4.4 and is in tangential fit with a taper hole in the overflow valve seat 4.4, the spring support 4.2 is installed in the inner hole of the overflow valve seat 4.4, the upper spherical concave surface is tightly pressed with the overflow steel ball 4.3, the plunger 4.5 is installed in the bottom inner hole of the overflow valve body 4.1, the disc spring 4.6 is installed between the spring support 4.2 and the plunger 4.5, and acting force on the plunger 4.5 is transmitted to the spring support 4.2 and the overflow steel ball 4.3. By tightening the overflow valve body 4.1, the conical surface at the top of the overflow valve seat 4.4 is tightly pressed with the conical inner hole in the integrated valve block 5 to perform conical hard sealing, so that the reliable sealing between the high-pressure side oil inlet P2 and the oil return port T2 can be ensured when the pressure is higher than 200 MPa.
As shown in fig. 2, 3, 4 and 5, 13 flow channels are formed on the integrated valve block 5, a first horizontal flow channel 5.1 is punched at the bottom of the low-pressure oil inlet port P1, a second horizontal flow channel 5.2 is punched at the right side surface of the integrated valve block 5 and is a process hole, a third horizontal flow channel 5.3 is punched at the left side surface of the integrated valve block 5 and is a process hole, a fourth horizontal flow channel 5.4 is punched at the bottom of the second auxiliary oil inlet port C2, a fifth horizontal flow channel 5.5 is punched at the right side surface of the integrated valve block 5 and is a process hole, a first inclined flow channel 5.6 is punched at the bottom of the low-pressure oil return port T1, a first vertical flow channel 5.7 is punched at the lower side surface of the integrated valve block 5 and is a process hole, a second vertical flow channel 5.8 is punched at the upper side surface of the integrated valve block 5 and is a proportional overflow valve 1 oil return hole, a first parallel flow channel 5.9 is punched at the bottom of the first auxiliary oil inlet port C1, a second parallel flow channel 5.10 is punched at the bottom of the high-pressure oil return port T2, a third parallel flow channel 5.11 is punched at the bottom of the integrated valve block 5, and is a fifth parallel flow channel 5.11 is punched at the bottom of the integrated valve 5 and is a one-way valve is mounted at the front surface of the integrated valve 5.
The low-pressure oil inlet P1 is communicated with oil inlets of the pressure-stabilizing damping 2 in the first horizontal flow channel 5.1, the first vertical flow channel 5.7, the fourth parallel flow channel 5.12 and the third horizontal flow channel 5.3, the low-pressure oil return port T1 is communicated with the first inclined flow channel 5.6 and the second vertical flow channel 5.8, the first auxiliary oil inlet C1 is communicated with oil outlets of the pressure-stabilizing damping 2 in the first parallel flow channel 5.9 and the third horizontal flow channel 5.3, the second auxiliary oil inlet C2 is communicated with the fourth horizontal flow channel 5.4, the fifth parallel flow channel 5.13 and the fifth horizontal flow channel 5.5, the high-pressure oil inlet P2 is communicated with the third parallel flow channel 5.11, and the high-pressure oil return port T2 is communicated with the second parallel flow channel 5.10 and the second horizontal flow channel 5.2.
The first plug 6.1 is installed on the sealing oil on the first vertical runner 5.7 screw thread, the second plug 6.2 is installed on the fourth parallel runner 5.12 screw thread, the third plug 6.3 is installed on the sealing oil in the third horizontal runner 5.3 screw thread, the fourth plug 6.4 is installed on the sealing oil in the fifth horizontal runner 5.5 screw thread, the fifth plug 6.5 is installed on the sealing oil in the third horizontal runner 5.3 screw thread, and the sixth plug 6.6 is installed on the sealing oil in the fifth parallel runner 5.13 screw thread.
As shown in fig. 6, the proportional pressure regulating valve for the ultrahigh pressure hydraulic system can realize the pressure rising unidirectional proportion regulating function of the ultrahigh pressure system, namely, a first auxiliary oil port C1 and a second auxiliary oil port C2 are plugged by bolts, the port P1 at the low pressure side is connected with the outlet of the low pressure pump 7, the port T1 at the oil return side is connected with an oil tank, the port P2 at the high pressure side is connected with the outlet of the ultrahigh pressure pump 8, the port T2 at the oil return side is connected with the oil tank, the outlet pressure of the low pressure pump 7 is regulated by the proportional relief valve 1, oil at the outlet of the low pressure pump 7 enters the end face plunger cavity of the plunger 4.5 of the hydraulic relief valve 4 through the pressure stabilizing damping 2 and the one-way valve 3, a thrust compression disc spring 4.6 is generated on the plunger 4.5, when the pressure at the port P2 acts on the overflow steel ball 4.3, the overflow steel ball 4.3 is opened, the hydraulic relief valve 4 starts to overflow, and the pressure at the port P2 at the high pressure is basically unchanged. The damping effect of the pressure stabilizing damping 2 can reduce the pressure fluctuation value of the C1 port when the pressure fluctuation occurs at the P1 port, in the process of controlling the pressure rising of the P1 port, the oil liquid at the P1 port can freely enter the plunger cavity of the hydraulic control overflow valve 4 through the one-way valve 3, the overflow pressure of the P2 port can be increased along with the pressure increase of the P1 port, in the process of pressure falling of the P1 port, the pressure maintaining is carried out due to the fact that the one-way valve 3 can be reversely closed, the pressure of the plunger cavity of the hydraulic control overflow valve 4 cannot be reduced, and the pressure of the P2 port cannot be changed due to the pressure falling of the P1 port. When the pressure of the C1 port fluctuates, the unidirectional transmission pressure characteristic of the unidirectional valve 3 can reduce the pressure fluctuation amplitude of the plunger cavity. The sectional area of the plunger 4.5 is 20 times of the tangential area of the overflow steel ball 4.3, so that the pressure of the outlet of the low-pressure pump 7 can be controlled to be 0-200MPa by changing the pressure of the ultra-high pressure pump 8 within 0-10MPa, and the proportion adjustment of the pressure rising of the ultra-high pressure system can be realized by adjusting the current increase on the proportion overflow valve 1.
As shown in fig. 7, the proportional pressure regulating valve for the ultrahigh pressure hydraulic system can realize the pressure unloading function of the ultrahigh pressure system, namely, the port P1 of the low pressure side is connected with the outlet of the low pressure pump 7, the port T1 of the oil return is connected with the oil tank, the port P2 of the high pressure side is connected with the outlet of the ultrahigh pressure pump 8, the port T2 of the oil return is connected with the oil tank, the first auxiliary port C1 is plugged by a plug, the second auxiliary port C2 is connected with the normally-off two-position two-way electromagnetic directional valve 9, after the electromagnetic directional valve 9 is electrified, the plunger cavity oil of the hydraulic control overflow valve 4 is quickly decompressed to the oil tank through the electromagnetic directional valve 9, the hydraulic control overflow valve steel ball 4.3 is opened, and the outlet pressure of the ultrahigh pressure pump 8 realizes unloading.
As shown in fig. 8, the proportional pressure regulating valve for the ultrahigh pressure hydraulic system can realize the bidirectional proportional regulation function of pressure rising/falling of the ultrahigh pressure system, wherein the port P1 of the low pressure side is connected with the outlet of the low pressure pump 7, the port T1 of the oil return is connected with the oil tank, the port P2 of the high pressure side is connected with the outlet of the ultrahigh pressure pump 8, the port T2 of the oil return is connected with the oil tank, the first auxiliary port C1 and the second auxiliary port C2 are respectively connected with the ports at the two ends of the normally-off two-position two-way electromagnetic directional valve 9, and the proportional regulation of the pressure rising of the ultrahigh pressure system can be realized when the electromagnetic directional valve 9 is not powered. When the pressure of the low pressure port P1 is controlled to be reduced by the proportional overflow valve 1, after the electromagnetic directional valve 9 is powered, plunger cavity oil of the hydraulic control overflow valve 4 can be directly connected with the C1 port through the electromagnetic directional valve 9, the one-way valve 3 does not work, the plunger cavity pressure can be reduced along with the pressure reduction of the P1 port, the overflow pressure of the P2 port is reduced in proportion along with the pressure reduction of the P1 port, and therefore the proportional adjustment of the outlet pressure of the ultra-high pressure pump 8 is realized.
It will be appreciated by persons skilled in the art that the foregoing description is a preferred embodiment of the invention, and is not intended to limit the invention, but rather to limit the invention to the specific embodiments described, and that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for elements thereof, for the purposes of those skilled in the art. Modifications, equivalents, and alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
1. The external control type ultrahigh pressure proportional pressure regulating valve is characterized by comprising a proportional overflow valve (1), a pressure stabilizing damper (2), a one-way valve (3), a hydraulic control overflow valve (4), an integrated valve block (5) and a plug (6), wherein the external control type ultrahigh pressure proportional pressure regulating valve is a tubular connecting valve, and an oil port comprises a low pressure side oil port P1 and an oil return port T1, a high pressure side oil port P2 and an oil return port T2, a first auxiliary oil port C1 and a second auxiliary oil port C2.
2. The external control type ultrahigh pressure ratio pressure regulating valve according to claim 1, wherein the proportional overflow valve (1) is of a cartridge valve structure and comprises a proportional electromagnet (1.1), a cone valve core (1.2), a circular valve seat (1.3) and a proportional valve sealing ring (1.4), the proportional electromagnet (1.1) is provided with a bolt port, the bolt port is fixed with the integrated valve block (5) through the bolt and is sealed through the proportional valve sealing ring (1.4), the cone valve core (1.2) is arranged in a second vertical flow channel (5.8) of the integrated valve block (5), the circular valve seat (1.3) is arranged in a first vertical flow channel (5.7) of the integrated valve block (5) in an interference fit mode, the cone valve core (1.2) is tangentially matched with an inner hole of the circular valve seat (1.3) under the thrust action of the proportional electromagnet, an oil inlet of the proportional valve (1) is communicated with a low pressure oil inlet P1, an oil return port of the cone valve core cavity is communicated with the low pressure P1 through the low pressure port of the electromagnet (1.1), and the low pressure side of the pressure regulator valve is adjustable.
3. The external control type ultrahigh pressure ratio pressure regulating valve according to claim 2, wherein the pressure stabilizing damper (2) is a thread fixed damper, the pressure stabilizing damper is installed in a third horizontal flow passage (5.3) of the integrated valve block (5), oil ports on two sides of the pressure stabilizing damper (2) are respectively communicated with a low pressure side oil port P1 and a first auxiliary oil port C1, and throttling action on the pressure stabilizing damper (2) can stabilize the pressure of the C1 port.
4. An external control type ultrahigh pressure proportional pressure regulating valve according to claim 3, wherein the one-way valve (3) comprises a one-way steel ball (3.1), a steel ball base (3.2), a return spring (3.3) and a spring support (3.4), the one-way steel ball (3.1) is installed in a fifth parallel flow passage (5.13) of the integrated valve block (5) and is tangential to the first parallel flow passage (5.3), the steel ball base (3.2) is used for supporting the one-way steel ball (3.1), the return spring (3.3) is installed between the steel ball base (3.2) and the spring support (3.4), the spring support (3.4) is used for compressing the return spring to compress the steel ball (3.1), and the one-way valve (3) can enable oil at a first auxiliary oil port C1 to flow to a second auxiliary oil port C2 in one direction.
5. The external control type ultrahigh pressure proportional pressure regulating valve according to claim 4, wherein the hydraulic control overflow valve (4) is of a plug-in type structure and comprises an overflow valve body (4.1), a spring support (4.2), an overflow steel ball (4.3) and an overflow valve seat (4.4), a plunger (4.5), a disc spring (4.6) and an overflow valve sealing ring (4.7), an oil inlet of the hydraulic control overflow valve (3) is communicated with a high-pressure side oil inlet P2, an oil return port is communicated with a high-pressure side oil return port T2, oil in a plunger action cavity is communicated with a C2 port, an external thread is arranged on the overflow valve body (4.1) and is in plug-in connection with an internal thread on an integrated valve block (5), the overflow steel ball (4.4) is in interference fit with the overflow valve body (4.1), the overflow steel ball (4.3) is arranged in an inner hole of the overflow valve seat (4.4), the spring support (4.2) is in interference fit with the inner hole in the overflow steel ball (4.4), the spring support (4.2) is arranged in the disc spring support (4.4) is tangential to the plunger (4.4.5) and is arranged in the inner hole of the plunger (4.4.4) and is compressed tightly pressed on the plunger (4.4.5) and the plunger (4.4) is arranged on the inner hole (4.5), by tightening the overflow valve body (4.1), the conical surface at the top of the overflow valve seat (4.4) and the conical inner hole in the integrated valve block (5) are tightly pressed for conical hard sealing, so that the high-pressure side oil inlet P2 and the oil return port T2 can be reliably sealed when the pressure is higher than 200 MPa.
6. The external control type ultrahigh pressure ratio pressure regulating valve according to claim 5, wherein the integrated valve block (5) is provided with a first horizontal flow passage (5.1) on the left side surface and is coaxially communicated with the low pressure oil inlet port P1, a second horizontal flow passage (5.2) on the right side surface, a third horizontal flow passage (5.3) and a fourth horizontal flow passage (5.4) on the left side surface and are coaxially communicated with the second auxiliary oil port C2, a fifth horizontal flow passage (5.5) on the right side surface, and a first inclined flow passage (5.6) on the left side surface and is communicated with the low pressure oil return port T1;
The integrated valve block (5) is provided with a first vertical flow passage (5.7) on the lower side surface, and is provided with a second vertical flow passage (5.8) on the upper side surface and is coaxial with the first vertical flow passage (5.7);
The integrated valve block (5) is provided with a first parallel flow passage (5.9) on the front surface and is coaxially communicated with a first auxiliary oil port C2, a second parallel flow passage (5.10) on the front surface and is coaxially communicated with a high-pressure oil return port T2, a third parallel flow passage (5.11) on the front surface and is coaxially communicated with a high-pressure oil inlet port P2, a fourth parallel flow passage (5.12) on the front surface, and a fifth parallel flow passage (5.13) on the back surface and is coaxial with the first parallel flow passage (5.9);
The first horizontal runner (5.1) is in cross communication with the first vertical runner (5.7) and the fourth horizontal runner (5.12), the second horizontal runner (5.2) is in cross communication with the second horizontal runner (5.10), the third horizontal runner (5.3) is in cross communication with the first parallel runner (5.9) and the fourth parallel runner (5.12), the fourth horizontal runner (5.4) is in cross communication with the fifth parallel runner (5.13), the fifth parallel runner (5.5) is in cross communication with the fifth parallel runner (5.13), the first inclined runner (5.6) is in cross communication with the second vertical runner (5.8), the first vertical runner (5.7) is in cross communication with a low-pressure oil inlet port P1, and the second vertical runner (5.8) is in cross communication with a low-pressure oil return port T1.
7. The external control type ultrahigh pressure ratio pressure regulating valve according to claim 6, wherein 6 plugs are provided, external threads of the first plug (6.1) are matched with internal threads of the first vertical runner (5.7), external threads of the second plug (6.2) are matched with internal threads of the fourth parallel runner (5.12), external threads of the third plug (6.3) are matched with internal threads of the second horizontal runner (5.2), external threads of the fourth plug (6.4) are matched with internal threads of the fifth parallel runner (5.5), external threads of the fifth plug (6.5) are matched with internal threads of the third horizontal runner (5.3), and external threads of the sixth plug (6.6) are matched with internal threads of the fifth parallel runner (5.13).
8. The external control type ultrahigh pressure proportional pressure regulating valve according to claim 7, wherein the proportional pressure regulating valve for an ultrahigh pressure hydraulic system can realize a pressure rising unidirectional proportional regulating function of the ultrahigh pressure system: the first auxiliary oil port C1 and the second auxiliary oil port C2 are plugged by a plug, the port of the low-pressure side oil port P1 is connected with the outlet of the low-pressure pump, the port of the oil return port T1 is connected with an oil tank, the port of the high-pressure side oil port P2 is connected with the outlet of the ultra-high pressure pump, the port of the oil return port T2 is connected with the oil tank, the outlet pressure of the low-pressure pump is regulated by the proportional overflow valve (1), the oil at the outlet of the low-pressure pump enters the end face plunger cavity of the plunger (4.5) of the hydraulic control overflow valve (4) through the pressure stabilizing damping (2) and the one-way valve (3), the acting force on the plunger is transmitted to the overflow steel ball (4.3) through the spring support (4.2), the pressure of the outlet of the ultra-high pressure pump acts on the opening direction of the overflow steel ball (4.3), the pressure of the high-pressure oil inlet P2 is multiplied by the sectional area of the section of the overflow steel ball (4.3) and the overflow valve seat (4.4) to be the opening force of the hydraulic control overflow valve (4), the pressure of the plunger cavity is multiplied by the end area of the plunger (4.5) to be the propelling force of the hydraulic control overflow valve (4), when the opening force is larger than the propelling force, the overflow steel ball (4.3) is opened, the hydraulic control overflow valve (4) starts to overflow, so that the pressure of the high-pressure oil inlet P is basically unchanged, the damping effect of the pressure stabilizing damping (2) can reduce the pressure fluctuation value of the C1 when the pressure fluctuation occurs at the P1 port, in the process of controlling the pressure rising of the P1 port, oil liquid of the P1 port can freely enter a plunger cavity of the hydraulic control overflow valve (4) through the one-way valve (3), the overflow pressure of the P2 port can be increased along with the pressure increase of the P1 port, in the process of the pressure falling of the P1 port, the pressure of the plunger cavity of the hydraulic control overflow valve (4) cannot be reduced due to the fact that the one-way valve (3) can be reversely closed for pressure maintaining, the P2 port cannot be changed due to the pressure falling of the P1 port, when the pressure of the C1 port fluctuates, the pressure fluctuation amplitude of the plunger cavity can be reduced due to the fact that the cross section area of the plunger (4.5) is 20 times that of the tangent area of the steel ball (4.3), the pressure of the low pressure pump can be controlled to be changed within 0-200MPa due to the fact that the pressure of the low pressure pump is changed within 0-10MPa, and the proportion adjustment of the pressure of the ultrahigh pressure system can be achieved when the pressure rising of the ultrahigh pressure is achieved through adjusting the current increase of the proportion overflow valve (1).
9. The external control type ultrahigh pressure proportional pressure regulating valve according to claim 8, wherein the ultrahigh pressure hydraulic system can realize the pressure unloading function of the ultrahigh pressure system by using the proportional pressure regulating valve, the first auxiliary oil port C1 is plugged by a screw plug, the second auxiliary oil port C2 is connected with a normally-off two-position two-way electromagnetic reversing valve, after the electromagnetic reversing valve is powered on, the oil in a plunger cavity of the hydraulic control overflow valve (4) is quickly released from the oil tank by the electromagnetic reversing valve, the hydraulic control overflow valve steel ball (4.3) is opened, and the pressure of a high-pressure inlet P2 is unloaded.
10. The external control type ultrahigh pressure proportional pressure regulating valve according to claim 9, wherein the proportional pressure regulating valve for the ultrahigh pressure hydraulic system can realize a bidirectional proportional regulating function of pressure rising/falling of the ultrahigh pressure system, wherein the first auxiliary oil port C1 and the second auxiliary oil port C2 are respectively connected with oil ports at two ends of a normally-off two-position two-way electromagnetic reversing valve, when the electromagnetic reversing valve is not electrified, the proportional regulation of the pressure rising of the ultrahigh pressure system can be realized, when the electromagnetic reversing valve (1) controls the pressure falling of a low pressure port P1, after the electromagnetic reversing valve is electrified, plunger cavity oil of the hydraulic control overflow valve (4) can be directly connected with the C1 port through the electromagnetic reversing valve, the one-way valve (3) does not work, the plunger cavity pressure can be reduced along with the pressure reduction of the P1 port, and the overflow pressure of the P2 port is reduced in proportion along with the pressure reduction of the P1 port, so that the proportional regulation of the pressure falling of the ultrahigh pressure system is realized.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202511273525.7A CN120759819B (en) | 2025-09-08 | An externally controlled ultra-high pressure proportional pressure regulating valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202511273525.7A CN120759819B (en) | 2025-09-08 | An externally controlled ultra-high pressure proportional pressure regulating valve |
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