CN113007388A - Pressure regulating valve with spherical piston structure for proportional solenoid valve - Google Patents
Pressure regulating valve with spherical piston structure for proportional solenoid valve Download PDFInfo
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- CN113007388A CN113007388A CN202110342573.2A CN202110342573A CN113007388A CN 113007388 A CN113007388 A CN 113007388A CN 202110342573 A CN202110342573 A CN 202110342573A CN 113007388 A CN113007388 A CN 113007388A
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- 230000001105 regulatory effect Effects 0.000 title claims abstract description 54
- 239000007769 metal material Substances 0.000 claims description 8
- 230000007246 mechanism Effects 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 claims description 2
- 239000003344 environmental pollutant Substances 0.000 claims description 2
- 238000001746 injection moulding Methods 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 231100000719 pollutant Toxicity 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000010923 batch production Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 58
- 230000009471 action Effects 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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Classifications
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/31—Self-supporting filtering elements
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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
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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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
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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
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
- F16K17/28—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only
- F16K17/30—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only spring-loaded
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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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0603—Multiple-way valves
- F16K31/061—Sliding valves
- F16K31/0613—Sliding valves with cylindrical slides
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention relates to a pressure regulating device with a spherical piston structure for a proportional solenoid valve, which comprises a valve body, a valve core, a spherical piston, a spring, a valve seat, an O-shaped ring and a filter screen. The pressure adjusting device of the spherical piston structure has the advantages of good pressure adjusting characteristic, strong pollution resistance, low manufacturing difficulty and good batch production stability.
Description
Technical Field
The invention relates to a pressure regulating valve with a spherical piston structure, in particular to a pressure regulating valve applied to a proportional pressure regulating electromagnetic valve for accurately controlling the pressure of a hydraulic system.
Background
Pressure regulating valves are widely used in hydraulic systems. Proportional pressure regulating valves used for precise pressure electric control of various hydraulic systems are key elements of the hydraulic systems. The electric control proportional pressure regulating valve is also named by the fact that the electromagnet drives the main valve regulating mechanism to act according to the input signal to realize the regulating function of the main valve part on the input pressure, and the pressure is output from the pressure regulating port to the outside.
The pressure regulating valves have various types and structures, and the chinese patent application No. CN200880005948.9 includes a structure of a regulating valve portion in a typical proportional pressure regulating valve, that is, a stepped main valve structure in which a valve body (referred to as a sleeve 42 in the patent) having a stepped hole structure is engaged with a spool having a stepped shaft shape, and a pressure feedback to a regulating port pressure is realized by applying a control port pressure to an area difference formed by a step (referred to as a land in the patent) to form a hydraulic pressure by the area difference, thereby realizing a pressure regulating function of the regulating valve. The patent specifically includes: the control port pressure is introduced through the pressure feedback port 58 into the annular area difference formed by land 62 and land 66 on the spool (referred to herein as the spool) to create hydraulic pressure to feed back the spool 44 to function as the main valve portion of the solenoid valve.
The chinese invention patent application No. 201410007875.4 includes another representative pressure regulating valve structure, namely, an overflow type pressure regulating valve structure and a non-step regulating main valve structure.
The working principle is that oil source pressure enters a pilot cavity pressure feedback cavity 4e through a pilot cavity oil inlet 3d arranged on a valve core 3 and acts on a mandril 10 to generate hydraulic pressure to drive the mandril 10 to compress an adjusting spring 17, so that hydraulic oil in the pilot cavity is discharged outwards through a pilot cavity oil outlet 4d to release pressure. When the hydraulic pressure formed by the pressure in the pilot pressure feedback cavity 4e acting on the ejector rod is smaller than the spring force generated by the adjusting spring 17, the ejector rod 10 is pushed by the adjusting spring 17 to move towards the valve body 3, oil is discharged outwards through the oil discharge port of the pilot cavity, so that the pressure in the pressure feedback cavity 4e is increased, when the pressure in the pressure feedback cavity 4e acting on the ejector rod 10 is larger than the spring force generated by the adjusting spring 17 again, oil is discharged again, the pressure in the pilot pressure feedback cavity 4e is reduced, and the default stable pilot cavity pressure with small fluctuation in a certain range is formed in a circulating mode. The valve core 3 is in a single cylindrical shape, the hydraulic pressure formed by the pressure in the pilot pressure feedback cavity acting on the cylindrical area of the valve core 3 and the hydraulic pressure formed by the outlet pressure acting on the cylindrical area of the valve core 3 and the pressure of the reset spring at the lower end of the valve core 3 are balanced, and the outlet pressure is approximately equal to the pressure in the pilot pressure feedback cavity 4e due to the small reset spring force.
For a step type pressure regulating valve structure, to realize an accurate and stable pressure regulating function, the relative motion between a valve core and a valve body needs to be very flexible, meanwhile, the fit clearance between the valve core and the valve body cannot be reduced without limit due to inevitable existence of mechanical manufacturing errors, and the problem that both processing difficulty of a step type hole and a shaft is large is solved. And the position error of different direct step-like cylinders and inner holes increases the influence of dimensional tolerance, so that a clearance must be reserved between the valve core and the valve body to ensure that the valve core can flexibly move in the valve body to realize the functions of accurate pressure and stable regulation. The problem of large internal leakage caused by large fit clearance is that the oil supply load of an oil source system is increased.
The overflow type pressure regulating valve has the working mode that the pressure is regulated through oil drainage, and when the overflow type pressure regulating valve works under higher pressure, the oil drainage flow is large, so that the oil source load is increased, and the use range of the overflow type pressure regulating valve is limited to be used at lower input pressure or as a pilot valve. When the pilot valve is used as a pilot valve, the structure is complex and vibration is easy to occur. The non-step main valve structure has high requirement for input driving force, and when the main valve pressure control port has great requirement for output flow, it is difficult for general electromagnet to provide enough driving force, so that its application range is limited.
The structure of the current representative pressure regulating valve has the problems of difficult processing and limited adjustable pressure range.
Disclosure of Invention
In order to solve the problems that the existing pressure regulating valve is difficult to process and the regulating pressure range is limited, the invention provides the pressure regulating valve which has a simple structure and a large pressure regulating range and is used for a spherical piston structure compared with an electromagnetic valve.
The technical solution of the patent of the invention is as follows: (see the claims for details)
The invention has the advantages that:
1. the invention adopts the pressure feedback regulating valve structure with the spherical piston structure, thereby greatly reducing the processing quality requirement of the inner hole of the pressure feedback cavity, and particularly obviously reducing the processing difficulty of the small hole in the valve core when the working pressure of the regulating valve is higher.
2. The invention adopts the pressure regulating valve structure with the spherical piston structure, the spherical piston can roll in the inner hole of the valve core, thereby greatly reducing the influence of friction on the movement of the valve core, reducing the probability of performance reduction and failure of the pressure regulating valve caused by the clamping of the valve core and improving the working reliability of pressure regulation.
3. The invention adopts the pressure feedback regulating valve structure with the spherical piston structure, and the spherical piston can roll in the valve core, so that a smaller fit clearance can be adopted between the spherical piston and the inner hole of the valve core, the relative movement is flexible, the outward leakage of oil products in a pressure feedback cavity of the electromagnetic valve through the fit clearance is reduced, particularly under the working condition of higher working pressure of the pressure regulating valve, the working pressure range of the pressure regulating valve is expanded, and the performance of the pressure regulating valve is improved.
Drawings
FIG. 1 is a schematic diagram of a pressure regulating valve with a ball piston type structure for a proportional solenoid valve according to the present invention;
wherein the reference numerals are: the pressure regulating valve comprises a valve body 1, an oil inlet 1a, a pressure regulating port 1b, an oil return port 1c, a valve core 2, a small pressure guiding hole 2a, a large pressure guiding hole 2b, a pressure feedback hole 2c, a spherical piston 3, a return spring 4 and a valve seat 5.
Detailed Description
As shown in fig. 1, a pressure regulating valve with a ball-type piston structure for a proportional solenoid valve has the key technology that: the valve comprises a valve body 1 (comprising an oil inlet 1a, a pressure adjusting port 1b and an oil return port 1 c), a valve core 2 (comprising a small pressure guiding hole 2a, a large pressure guiding hole 2b and a pressure feedback hole 2c), a spherical piston 3, a return spring 4 and a valve seat 5. The pressure regulating valve comprises a valve body 1, a valve core 2, a spherical piston 3, a return spring 4, a valve seat 5, rubber rings 6 (4) and filter screens 7 (3).
The valve body 1 is in a multi-section cylindrical shape, grooves are formed in the surface of the cylinder, through holes are formed in the valve body 1, symmetrically distributed oil circuit interfaces are formed in the side face of the valve body and comprise an oil inlet 1a, a pressure adjusting port 1b and an oil return port 1c, annular grooves are formed in the through holes and the pressure adjusting port in the valve body 1, and the valve body 1 is made of metal materials. The large cylinder at the left end of the valve body 1 is fixedly connected with a driving mechanism, and the cylinder at the right end is arranged in a device needing pressure regulation. The external groove of the valve body 1 is used for placing an O-shaped ring to seal the oil inlet 1a, the pressure adjusting port 1b and the oil return port 1 c. The through hole in the valve body 1 is used for placing the valve core 2, and the valve core 2 can slide in the through hole in the valve body 1 in a reciprocating manner. The right end of the valve body 1 is tightly connected with the valve seat 5.
The valve core 2 is a multi-section cylindrical structure, the right end of the valve core is provided with a large pressure leading hole 2b and a pressure feedback hole 2c which are communicated, and the large pressure leading hole 2b is communicated to the outer cylindrical surface of the valve core 2 through a small pressure leading hole 2 a. The valve core 2 is made of metal materials, and the wear resistance is improved by adopting special treatment. The valve core 2 is placed in a through hole in the valve body 1, and the small cylinder at the left end is used for receiving input driving force to drive the valve core 2 to slide in the valve body 1 in a reciprocating manner, so that the function of adjusting the pressure supplied by the oil inlet 1a on the valve body 1 to a preset value and outputting the pressure from the pressure control port 1b on the valve body 1 is realized. The small pressure guiding hole 2a on the valve core 2 is used for communicating the pressure of the pressure adjusting port to the large pressure guiding hole 2b and the pressure feedback hole 2c, and further acts on the valve core 2 to form hydraulic feedback force. And the outer cylindrical surface of the valve core 2 is provided with a plurality of small grooves for reducing hydraulic locking force.
The spherical piston 3 is in a spherical structure, the size of the spherical piston meets the standard steel ball contained in national standard or other standards, and the spherical piston is made of wear-resistant metal. The ball-type piston 3 is arranged in a pressure feedback hole 2c on the valve core 2, and the ball-type piston 3 can slide and roll in the pressure feedback hole 2 c. The spherical piston 3 is tightly attached to the valve seat 5 during working.
The reset spring 4 is a cylindrical compression spring and is made of metal materials, the left end of the reset spring is sleeved on the valve core 2, and the right end of the reset spring is tightly attached to the valve seat 5. The valve seat 5 is a multi-section cylindrical structure, and small holes 5a (2) are formed in the maximum cylinder at the right end and are made of metal materials. The valve seat 5 is tightly fitted with the valve body 1.
The rubber rings 6 are O-shaped rings, the number of the O-shaped rings is 4, the inner diameter and the wire diameter of each O-shaped ring are different due to different installation requirements, and the O-shaped rings are made of corrosion-resistant high-temperature and low-temperature resistant rubber. The valve body is used for sealing between the oil inlet 1a and the pressure adjusting port 1b, sealing between the pressure adjusting port 1b and the oil return port 1c and sealing between the valve body 1 and a mechanical mechanism for mounting a valve plate. The filter screen 7 is in a thin-wall cylindrical shape, is made of a metal net and a plastic support through injection molding, is sleeved in a groove on the outer cylindrical surface of the valve body 1 and positioned at the oil inlet 1a, the pressure adjusting port 1b and the oil outlet 1c, and is used for filtering pollutants in oil products.
When the left end input driving force of the valve core 2 is 0, the reset spring 4 pushes the valve core 1 to the left end, an oil path between the oil inlet 1a and the pressure adjusting port 1b is closed, the pressure adjusting port 1b is communicated with the oil return port 1c, the oil pressure in the pressure adjusting port 1b is relieved through the oil return port 1c (the oil return port is communicated with the atmosphere by default), and the pressure of the pressure adjusting port 1b is zero.
When the left end of the valve core 2 inputs driving force, the valve core 2 is driven to move rightwards, the reset spring 4 is compressed at the same time, an oil path between the oil inlet 1a and the pressure adjusting port 1b is opened, the oil pressure in the pressure adjusting port 1b and the oil return port 1c are closed, the pressure of the oil inlet 1a reaches the pressure adjusting port 1b and reaches the large pressure leading hole 2b and the pressure feedback hole 2c through the small pressure leading hole 2a, the pressure acts on the spherical piston 3 to push the spherical piston to be close to the valve seat 5, the oil pressure in the pressure feedback hole is kept, and the oil pressure in the pressure feedback hole acts on the valve core 2 to form hydraulic feedback force opposite to the input driving force.
When the hydraulic feedback force is larger than the input driving force, the valve core 2 moves leftwards under the action of the resultant force of the input driving force and the hydraulic feedback force, an oil way between the oil inlet 1a and the pressure adjusting port 1b is closed, the pressure adjusting port 1b is communicated with the oil return port 1c, and the oil pressure in the pressure adjusting port 1b and the oil pressure in the pressure feedback cavity 2c are relieved through the oil return port 1 c. When the hydraulic feedback force of the oil pressure in the pressure feedback cavity acting on the valve core 2 is smaller than the input driving force, the valve core moves to the right again to repeat the action, so that the valve core 2 is formed to perform reciprocating oscillation work, the oil pressure of the pressure adjusting port 1b is equal to the oil pressure in the pressure feedback cavity, and the hydraulic pressure acting on the valve core 2 is balanced with the input driving force.
When the input driving force is greater than the sum of the pressure of the oil supply port and the pressure of the hydraulic feedback cavity, the valve core 2 moves to the maximum position right under the action of the input driving force, the pressure adjusting port 1b is communicated with the oil return port 1c, an oil path between the pressure adjusting port 1b and the oil return port 1c is closed, the oil pressure of the oil supply port 1a enters the pressure adjusting port 1b and the hydraulic feedback cavity 1c, the hydraulic feedback force borne by the valve core 2 is smaller than the input driving force, the valve core is kept at the rightmost end, and the oil pressure of the pressure adjusting port 1b is equal to the oil pressure of the oil supply port.
Claims (3)
1. The utility model provides a pressure regulating valve of ball-type piston structure for proportion solenoid valve which characterized in that:
the pressure regulating valve comprises a valve body 1, a valve core 2, a spherical piston 3, a return spring 4, a valve seat 5, rubber rings 6 (4) and filter screens 7 (3);
the valve body 1 is in a multi-section cylindrical shape, grooves are formed in the surface of the cylinder, through holes are formed in the valve body 1, at least 3 oil way structure ports are formed in each cylindrical surface and comprise an oil inlet 1a, a pressure adjusting port 1b and an oil return port 1c, and the valve body 1 is made of metal materials;
the valve core 2 is of a multi-section cylindrical structure, a large pressure leading hole 2b and a pressure feedback hole 2c which are communicated are arranged at the right end, and the large pressure leading hole 2b is communicated to the outer cylindrical surface of the valve core 2 through a small pressure leading hole 2 a;
the valve core 2 is made of metal materials, and the wear resistance is improved by adopting special treatment;
the spherical piston 3 is of a spherical structure, the size of the spherical piston meets the standard steel ball contained in national standard or other standards, and the spherical piston is made of wear-resistant metal;
the return spring 4 is a cylindrical compression spring and is made of a metal material;
the valve seat 5 is of a multi-section cylindrical structure, and small holes 5a (2) are formed in the largest cylinder at the right end and are made of metal materials;
the O-shaped rings 6 are 4 annular circular sections, the inner diameter and the wire diameter of each O-shaped ring are allowed to be different, and the O-shaped rings are made of corrosion-resistant high-temperature and low-temperature resistant rubber;
the filter screen 7 is in a thin-wall cylindrical shape and is made of a metal net and a plastic bracket through injection molding;
the large cylindrical surface at the left end of the valve body 1 is used for being connected and fixed with a driving mechanism, and the cylindrical surface at the right end is used for being installed in a device needing pressure adjustment;
the groove arranged outside the valve body 1 is used for placing an O-shaped ring to seal the oil inlet 1a, the pressure adjusting port 1b and the oil return port 1 c;
the through hole in the valve body 1 is used for placing the valve core 2, and the valve core 2 can slide in the through hole in the valve body 1 in a reciprocating manner;
the right end of the valve body 1 is tightly connected with the valve seat 5;
the valve core 2 is placed in a through hole in the valve body 1, and the small cylinder at the left end is used for receiving input driving force to drive the valve core 2 to slide in the valve body 1 in a reciprocating manner, so that the function of regulating the pressure supplied by the oil inlet 1a on the valve body 1 to a preset value and outputting the pressure from the pressure control port 1b on the valve body 1 is realized;
the small pressure guiding hole 2a on the valve core 2 is used for communicating the pressure of the pressure adjusting port to the large pressure guiding hole 2b and the pressure feedback hole 2c, and further acts on the valve core 2 to form hydraulic feedback force;
the outer cylindrical surface of the valve core 2 is provided with a plurality of small grooves for reducing hydraulic locking force;
the spherical piston 3 is placed in a pressure feedback hole 2c on the valve core 2, and the spherical piston 3 can slide and roll in the pressure feedback hole 2 c;
the spherical piston 3 is tightly attached to the valve seat 5 during working;
the reset spring 4 is used for resetting the valve core 2, so that when the regulating valve does not work, the valve core is always positioned at the left end, the closing between the oil inlet 1a and the oil outlet 1c of the pressure regulating port 1b is ensured, and the opening between the pressure regulating port 1b and the oil return port 1c is ensured;
the valve seat 5 is arranged in a right end hole of the valve body 1, and the two oil drainage ports 5a are used for discharging internal oil leakage generated by the existence of a fit clearance between the valve body 1 and the valve core 2;
the O-shaped ring 6 is sleeved in a groove arranged on the outer cylindrical surface of the valve body 1 and is used for sealing between the oil inlet 1a and the pressure adjusting port 1b, between the pressure adjusting port 1b and the oil return port 1c and between the valve body 1 and a mechanical mechanism for mounting a valve plate;
the filter screen cup joints in the slot that is located oil inlet 1a, pressure adjustment mouth 1b and oil return opening 1c position on the outer cylindrical surface of valve body 1 for filter the pollutant that exists in the oil.
2. The pressure regulating valve of the ball-type piston structure for the proportional solenoid valve as set forth in claim 1, wherein: the ball-type piston 3 is not connected to the valve core 2 nor the valve seat 5, and can roll in the pressure feedback hole 2c in the valve core 2.
3. The pressure regulating valve of the ball-type piston structure for the proportional solenoid valve as set forth in claim 1, wherein: the spherical piston 3 and the valve core 2 are combined to form a piston type pressure feedback cavity structure of the pressure regulating valve, the spherical piston 3 serves as the spherical piston to keep the oil pressure in the pressure feedback hole 2c in the valve core 2, and the formed pressure acts on the cross section of the pressure feedback hole 2c to form hydraulic feedback force which is balanced with the driving force for driving the valve core 4.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110342573.2A CN113007388A (en) | 2021-03-30 | 2021-03-30 | Pressure regulating valve with spherical piston structure for proportional solenoid valve |
| CN202111467545.XA CN116771950A (en) | 2021-03-30 | 2021-12-03 | Proportional solenoid valve and pressure regulating device therein |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110342573.2A CN113007388A (en) | 2021-03-30 | 2021-03-30 | Pressure regulating valve with spherical piston structure for proportional solenoid valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113007388A true CN113007388A (en) | 2021-06-22 |
Family
ID=76409423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110342573.2A Pending CN113007388A (en) | 2021-03-30 | 2021-03-30 | Pressure regulating valve with spherical piston structure for proportional solenoid valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113007388A (en) |
-
2021
- 2021-03-30 CN CN202110342573.2A patent/CN113007388A/en active Pending
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Application publication date: 20210622 |