CN112879372A - Pressure regulating valve of bidirectional variable plunger pump - Google Patents
Pressure regulating valve of bidirectional variable plunger pump Download PDFInfo
- Publication number
- CN112879372A CN112879372A CN202110274725.XA CN202110274725A CN112879372A CN 112879372 A CN112879372 A CN 112879372A CN 202110274725 A CN202110274725 A CN 202110274725A CN 112879372 A CN112879372 A CN 112879372A
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- China
- Prior art keywords
- valve
- cavity
- pressure regulating
- plunger pump
- sleeve
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/028—Shuttle valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/08—Regulating by delivery pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
- F04B53/109—Valves; Arrangement of valves inlet and outlet valve forming one unit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
- F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
- F16K11/0716—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides with fluid passages through the valve member
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/0446—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with an obturating member having at least a component of their opening and closing motion not perpendicular to the closing faces
- F16K17/046—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with an obturating member having at least a component of their opening and closing motion not perpendicular to the closing faces the valve being of the gate valve type or the sliding valve type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/0473—Multiple-way safety valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/06—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/164—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side and remaining closed after return of the normal pressure
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Safety Valves (AREA)
Abstract
The invention discloses a pressure regulating valve of a bidirectional variable plunger pump, which comprises a valve body (713), wherein a bushing (71), a valve sleeve (73) and a threaded sleeve (79) are sequentially arranged in the valve body (713) from left to right, and a shuttle valve core (72), a mandril (74), a valve core (75), a left spring seat (76), a spring (77) and a right spring seat (78) are sequentially arranged in the valve sleeve (73) from left to right; the valve body (713) is sequentially provided with a cavity A, a cavity B, a cavity T and a cavity P; and the cavity A and the cavity B are respectively positioned on two sides of a valve core (72) of the shuttle valve. The invention has the characteristics of small volume, compact structure, high integration level and low cost; the device also has the characteristics of adjustable set pressure, energy conservation and environmental protection.
Description
Technical Field
The invention relates to a pressure regulating valve, in particular to a pressure regulating valve of a bidirectional variable plunger pump.
Background
In engineering machinery, a rotary system is usually driven by a variable displacement plunger pump, and when a main machine rotates, the system pressure cannot be higher than a set pressure so as to ensure that each execution element cannot be overloaded. The traditional variable displacement plunger pump generally adjusts the system pressure through a high-pressure overflow valve, namely when the system pressure is higher than the set pressure, the overflow valve is opened to realize overflow, although the system pressure can be maintained in the set range, a large amount of energy loss is generated in the overflow process, and oil overflowing through the valve flows back to an oil tank, so that the oil temperature is overhigh, the energy is not saved, the environment is not protected, the energy consumption of a host is high, and the cost is high. Therefore, the prior art has the problem of high energy consumption.
Disclosure of Invention
The invention aims to provide a pressure regulating valve of a bidirectional variable plunger pump. The invention has the characteristics of energy saving and environmental protection.
The technical scheme of the invention is as follows: a pressure regulating valve of a bidirectional variable plunger pump comprises a valve body, wherein a bush, a valve sleeve and a threaded sleeve are sequentially arranged in the valve body from left to right, and a shuttle valve core, a mandril, a valve core, a left spring seat, a spring and a right spring seat are sequentially arranged in the valve sleeve from left to right; the valve body is sequentially provided with a cavity A, a cavity B, a cavity T and a cavity P; and the cavity A and the cavity B are respectively positioned on two sides of the valve core of the shuttle valve.
In the pressure regulating valve for the bidirectional variable plunger pump, the P cavity corresponds to the position of the valve core.
In the pressure regulating valve for the bidirectional variable plunger pump, the valve sleeve is provided with a radial hole a and a radial hole B which correspond to the cavity A and the cavity B respectively; the valve sleeve is also provided with a radial hole d and a radial hole e which correspond to the cavity T and the cavity P respectively.
In the pressure regulating valve for the bidirectional variable plunger pump, the valve body, the bush and the valve sleeve are internally provided with an M-shaped cavity corresponding to the valve core of the shuttle valve.
In the pressure regulating valve for the bidirectional variable plunger pump, an N cavity corresponding to the valve core is further arranged in the valve sleeve.
In the pressure regulating valve for the bidirectional variable plunger pump, the screw sleeve is further provided with a pressure regulating screw and a sealing lock nut.
In the pressure regulating valve for the bidirectional variable plunger pump, the lower parts of the cavity a and the cavity B are also provided with the plugs.
Compared with the prior art, the pressure regulating valve is integrated on the variable plunger pump, and the oil paths of the two oil inlets and the two oil outlets are arranged on two sides of the valve core of the shuttle valve, so that when one oil inlet and the oil outlet is communicated with the pressure regulating valve, the other oil inlet and the oil outlet are not communicated with the pressure regulating valve; with the increase of the load, when the rotary system reaches the set pressure of the pressure regulating valve, the variable cylinder returns to the middle position by cutting off oil of the reversing valve, so that the variable of the pump is changed to small displacement; meanwhile, the output pressure of the variable plunger pump is the set pressure of the pressure regulating valve, but no overflow loss exists, and the purposes of pressure regulation and energy conservation are achieved. Meanwhile, the pressure regulating valve is integrated on the variable plunger pump, the original design of the variable plunger pump is not changed, the installation of a host is not influenced, and the variable plunger pump has the characteristics of small volume, compact structure, high integration level and low cost; the pretightening force of the spring can be changed by adjusting the pressure regulating screw according to the specific requirements of customers, and the regulating pressure is adjusted. In conclusion, the invention has the characteristics of energy saving and environmental protection.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a functional diagram of the present invention;
fig. 3 shows the high pressure in the inlet and outlet, and the pressure regulating valve is in an open state.
Fig. 4 shows the high pressure in the inlet and outlet, and the pressure regulating valve is in an open state.
The labels in the figures are: 1-variable plunger pump, 2-variable cylinder, 3-reversing valve, 4-first high-pressure overflow valve, 5-second high-pressure overflow valve, 6-throttle valve, 7-pressure regulating valve, 8-gear pump, 71-bushing, 72-shuttle valve core, 73-valve sleeve, 74-ejector rod, 75-valve core, 76-first spring seat, 77-spring, 78-second spring seat, 79-screw sleeve, 710-sealing locking nut, 711-pressure regulating screw, 712-screw plug and 713-valve body.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.
Examples are given. A pressure regulating valve of a bidirectional variable plunger pump is formed as shown in figure 1 and comprises a valve body 713, wherein a bush 71, a valve sleeve 73 and a threaded sleeve 79 are sequentially arranged in the valve body 713 from left to right, and a shuttle valve spool 72, a push rod 74, a spool 75, a left spring seat 76, a spring 77 and a right spring seat 78 are sequentially arranged in the valve sleeve 73 from left to right; the valve body 713 is sequentially provided with a cavity A, a cavity B, a cavity T and a cavity P; the chamber a and the chamber B are located on either side of the shuttle valve spool 72.
The P-chamber corresponds in position to the spool 75.
A radial hole a and a radial hole B corresponding to the cavity A and the cavity B are formed in the valve sleeve 73; valve housing 73 is also provided with d and e radial bores corresponding to the T and P chambers, respectively.
An M-cavity corresponding to the shuttle valve spool 72 is provided in the valve body 713, the bushing 71 and the valve housing 73.
An N-cavity corresponding to the valve core 75 is also provided in the valve housing 73.
The screw sleeve 79 is also provided with a pressure regulating screw 711 and a sealing and locking nut 710.
The lower parts of the cavity A and the cavity B are also provided with screw plugs 712.
The working principle is as follows: as shown in fig. 2, a pressure regulating valve 7 is connected to a variable plunger pump 1, an opening a and an opening B of the variable plunger pump 1 are respectively connected to an opening a and an opening B of the pressure regulating valve 7, a chamber P of the pressure regulating valve 7 is connected to a reversing valve 3, and the reversing valve 3 is connected to a variable cylinder 2; the T cavity of the pressure regulating valve 7 is connected with an oil return tank.
The oil inlet and outlet of the A is connected with a second high-pressure overflow valve 5, the oil inlet and outlet of the B is connected with a first high-pressure overflow valve 4, the variable plunger pump 1 is connected with a gear pump 8, the gear pump 8 is connected with a throttle valve 6 and then respectively connected with a P cavity of a reversing valve 3 and a P cavity of a pressure regulating valve 7, and the gear pump 8 is respectively connected with the first high-pressure overflow valve 4 and the second high-pressure overflow valve 5.
Assuming that the oil inlet and outlet (denoted by A in FIG. 2) is an oil outlet, the oil inlet and outlet (denoted by B in FIG. 2) of B is an oil inlet.
As shown in fig. 1 and 2, when the variable displacement plunger pump 1 is not operating, the shuttle valve spool 72 is at an arbitrary position; when an oil inlet and an oil outlet A of the variable plunger pump 1 are oil outlets, an oil inlet and an oil outlet B of the variable plunger pump 1 are oil inlets, oil in the oil inlet and the oil outlet A of the variable plunger pump enters an M cavity (indicated by M in figure 1) through a radial small hole a in a valve sleeve 73, the shuttle valve spool 72 is pushed to move leftwards, a left end conical surface of the shuttle valve spool 72 and an orifice of a bushing 71 form sealing, meanwhile, the shuttle valve spool 72 and the valve sleeve 73 are in clearance fit to form ring surface sealing, so that the cavity B (indicated by B in figure 1) is not communicated with the cavity M, the cavity A is communicated with the cavity M at the moment, and the oil pressure of the cavity M is equal to that of the cavity A. When the product of the oil pressure and the area of the cylinder of the ejector rod 74 is larger than the pretightening force of the spring 77, the ejector rod 74 is pushed, and then the valve core 75 is pushed to move rightwards, so that the oil in the P cavity (designated by P in figure 1) is communicated with the N cavity (designated by N in figure 1) through the e radial small hole (designated by e in figure 1) in the valve sleeve 73, and the oil in the N cavity is communicated with the T cavity (designated by T in figure 1) through the d radial small hole in the valve sleeve 73, so that the P cavity is communicated with the T cavity, the oil in the P cavity flows back to the oil tank, the oil in the reversing valve 3 is cut off, the variable cylinder 2 returns to the middle position, the pump returns to the zero position or the small displacement position, and the pump is at the small displacement. When the pressure of the cavity A is reduced, the pressure of the cavity M is also reduced, the valve core 75 moves leftwards under the action of the spring 77 to close the small radial hole e on the valve sleeve 73, so that the cavity P is not communicated with the cavity N, oil enters the variable cylinder 2 through the reversing valve 3, and the pump performs large displacement.
Similarly, when the oil inlet and outlet B of the variable displacement plunger pump 1 is an oil outlet and the oil inlet and outlet a is an oil inlet, oil in the oil inlet and outlet B enters the cavity M through the cavity B and then through the radial small hole B in the valve sleeve 73, the shuttle valve spool 72 is pushed to move rightwards, the conical surface at the right end of the shuttle valve spool 72 and the hole opening of the valve sleeve 73 form a seal, meanwhile, the shuttle valve spool 72 and the valve sleeve 73 are in clearance fit to form a ring surface seal, so that the cavity a is not communicated with the cavity M, the cavity B is communicated with the cavity M at the moment, and the oil pressure in the cavity M. The M-cavity oil acts on the ejector rod 74 through a small hole in the middle of the shuttle valve spool 72, the pressure adjusting process is repeated, the variable cylinder 2 returns to the middle position, the pump returns to the zero position or the small displacement position, and at the moment, the pump is in the small displacement. When the pressure of the cavity B is reduced, the pressure of the cavity M is also reduced, the valve core 75 moves leftwards under the action of the spring 77, a small radial hole e in the valve sleeve 73 is closed, the cavity P is not communicated with the cavity N, oil enters the variable cylinder 2 through the reversing valve 3, and the pump is used for changing the displacement to a large displacement.
When the customer has different requirements on the system pressure, the pressure regulating screw 711 can be adjusted, the pretightening force of the spring 77 is changed, and the pressure regulating screw 710 is locked to meet the cutting-off requirements of the customer on different pressures.
Claims (7)
1. The utility model provides a two-way variable plunger pump pressure regulating valve which characterized in that: the valve comprises a valve body (713), wherein a bushing (71), a valve sleeve (73) and a threaded sleeve (79) are sequentially arranged in the valve body (713) from left to right, and a shuttle valve core (72), an ejector rod (74), a valve core (75), a left spring seat (76), a spring (77) and a right spring seat (78) are sequentially arranged in the valve sleeve (73) from left to right; the valve body (713) is sequentially provided with a cavity A, a cavity B, a cavity T and a cavity P; and the cavity A and the cavity B are respectively positioned on two sides of a valve core (72) of the shuttle valve.
2. The reversible variable displacement plunger pump pressure regulating valve of claim 1, further comprising: the P cavity corresponds to the position of the valve core (75).
3. The reversible variable displacement plunger pump pressure regulating valve of claim 1, further comprising: a radial hole a and a radial hole B which correspond to the cavity A and the cavity B respectively are arranged on the valve sleeve (73); the valve sleeve (73) is also provided with a d radial hole and an e radial hole which correspond to the T cavity and the P cavity respectively.
4. The reversible variable displacement plunger pump pressure regulating valve of claim 1, further comprising: and an M cavity corresponding to the shuttle valve spool (72) is arranged in the valve body (713), the bushing (71) and the valve sleeve (73).
5. The reversible variable displacement plunger pump pressure regulating valve of claim 1, further comprising: and an N cavity corresponding to the valve core (75) is also arranged in the valve sleeve (73).
6. The reversible variable displacement plunger pump pressure regulating valve of claim 1, further comprising: the screw sleeve (79) is also provided with a pressure regulating screw (711) and a sealing lock nut (710).
7. The reversible variable displacement plunger pump pressure regulating valve of claim 1, further comprising: the lower parts of the cavity A and the cavity B are also provided with screw plugs (712).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110274725.XA CN112879372A (en) | 2021-03-15 | 2021-03-15 | Pressure regulating valve of bidirectional variable plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110274725.XA CN112879372A (en) | 2021-03-15 | 2021-03-15 | Pressure regulating valve of bidirectional variable plunger pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112879372A true CN112879372A (en) | 2021-06-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110274725.XA Pending CN112879372A (en) | 2021-03-15 | 2021-03-15 | Pressure regulating valve of bidirectional variable plunger pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112879372A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113446280A (en) * | 2021-06-30 | 2021-09-28 | 北京航空航天大学宁波创新研究院 | Bidirectional differential pressure controller and hydraulic equipment |
-
2021
- 2021-03-15 CN CN202110274725.XA patent/CN112879372A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113446280A (en) * | 2021-06-30 | 2021-09-28 | 北京航空航天大学宁波创新研究院 | Bidirectional differential pressure controller and hydraulic equipment |
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