CN116771950A - Proportional solenoid valve and pressure regulating device therein - Google Patents

Proportional solenoid valve and pressure regulating device therein Download PDF

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Publication number
CN116771950A
CN116771950A CN202111467545.XA CN202111467545A CN116771950A CN 116771950 A CN116771950 A CN 116771950A CN 202111467545 A CN202111467545 A CN 202111467545A CN 116771950 A CN116771950 A CN 116771950A
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CN
China
Prior art keywords
hole
valve
pressure
valve core
valve seat
Prior art date
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
Application number
CN202111467545.XA
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Chinese (zh)
Inventor
王琦麟
毛晓明
孙明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shaanxi Huacheng Pilot Electromagnetic Technology Co ltd
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Shaanxi Huacheng Pilot Electromagnetic Technology Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from CN202110341859.9A external-priority patent/CN112984154A/en
Priority claimed from CN202110342573.2A external-priority patent/CN113007388A/en
Priority claimed from CN202110342292.7A external-priority patent/CN112984155A/en
Application filed by Shaanxi Huacheng Pilot Electromagnetic Technology Co ltd filed Critical Shaanxi Huacheng Pilot Electromagnetic Technology Co ltd
Publication of CN116771950A publication Critical patent/CN116771950A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • 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
    • F15B13/021—Valves for interconnecting the fluid chambers of an actuator
    • 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
    • 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
    • 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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/04—Construction of housing; Use of materials therefor of sliding valves
    • F16K27/041—Construction of housing; Use of materials therefor of sliding valves cylindrical slide valves
    • 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
    • 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
    • F16K31/0675—Electromagnet aspects, e.g. electric supply therefor

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Fluid Mechanics (AREA)
  • Electromagnetism (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

The invention provides a proportional electromagnetic valve and a pressure regulating device thereof, which are in an integrated proportional electromagnetic structure of a stop iron and a pole shoe, have high magnetic energy utilization rate, compact electromagnetic valve structure, small volume and excellent electromagnetic valve pressure regulating performance, and the electromagnetic valve has the function of cleaning pollutants and has good anti-pollution capability. The assembly stability is good, the processing difficulty is low, and the mass production quality stability is good. The pressure regulating device greatly reduces the processing quality requirement of the inner hole of the pressure feedback cavity, and particularly when the working pressure of the regulating valve is higher, the processing difficulty of the small hole in the valve core is obviously reduced. The ball-shaped piston can roll in the inner hole of the valve core, so that the influence of friction on the movement of the valve core is greatly reduced, and the probability of performance reduction and failure of the pressure regulating valve caused by the clamping of the valve core is reduced.

Description

Proportional solenoid valve and pressure regulating device therein
Technical Field
The invention particularly relates to a proportional solenoid valve and a pressure regulating device therein.
Background
Proportional pressure reducing valves are used in a large number of vehicle hydraulic systems for controlling the operation of hydraulic pressure driven mechanical mechanisms, in particular for driving the engagement of high pressure clutches.
The Chinese patent with application number 200910024360.4 discloses a structure of a proportional pressure-reducing electromagnetic valve, wherein a proportional electromagnet part adopts a typical blocking iron, an armature and a pole shoe to form a magnetic shunt, so that the electromagnet outputs electromagnetic force to an input signal in proportion. The typical proportion electromagnet structure has high requirements on the machining and assembling precision of parts, and the product qualification rate is low in mass production. The main valve adopts a step-type main valve (the valve body is a step hole, the valve core is a step shaft, the pressure feedback area is the area difference of the step shaft of the valve core) as a pressure reducing regulating valve, the step-type main valve structure has higher requirements on the processing of parts, particularly when a high-pressure clutch is driven, the higher pressure requires that the fit clearance of the main valve is very small, but the existence of mechanical manufacturing shape tolerance and position tolerance leads to the unlikely too small fit clearance of the step-type main valve, the internal leakage of the electromagnetic valve is larger when the high-pressure works, the additional load is caused on an oil source system, and the efficiency of a hydraulic system is reduced.
The Chinese patent with the application number of 201320489551.X provides a structure of an overflow type proportional pressure reducing electromagnetic valve, wherein the pressure feedback area is the valve port area, and the outlet pressure is regulated by overflow of an oil return port. Due to the limitations of its mode of operation, when operating at low pressure, the overflow flow is large, a large load and a dead load for the oil source system, limiting the use of solenoid valves. Meanwhile, due to the adoption of the overflow type pressure regulating principle, when the viscosity of liquid changes under the influence of temperature, the electromagnetic valve is easy to vibrate and age, so that the instability of a hydraulic system is increased.
The state patent application 201520557672.2 presents another construction of a proportional pressure relief solenoid valve. The electromagnet structure part is different from the traditional proportional electromagnet structure of the magnetic shunt, the output characteristic of the approximate proportional electromagnet is realized by a front end cover (figure number 12 in the patent), an adjusting screw (figure number 11 in the patent) and a push rod (figure number 14 in the patent), but the output characteristic is different from the traditional proportional electromagnet by a certain distance, and the proportional linear relation between the electromagnetic force output by the electromagnet and the input signal is poor. The proportional linearity characteristic is not good. Meanwhile, the distance between the adjusting screw rod (figure 11 in the patent) and the push rod (figure 14 in the patent) is large due to the installation position of the spring 13, the magnetic resistance is large, and the utilization rate of the magnetic field generated by the electromagnet after the coil receives the electric signal is not high. The main valve part adopts a piston main valve structure, but the cylindrical piston structure (not identified in the patent) is positioned between an adjusting spring (figure number 7 in the patent) and a valve core (figure number 5 in the patent), so that the contact area between the piston and the valve core is large, the processing difficulty of the valve core (figure number 5 in the patent) is large, and the problem that the piston is blocked and the electromagnetic valve is invalid due to processing defects and pollutants entering a fit gap is solved easily. Meanwhile, in the patent, since the cylindrical piston and the regulating spring (in the patent, the drawing number 7) are not fixed with the valve sleeve (in the patent, the drawing number 4) but are placed on the pressure reducing valve seat (in the patent, the drawing number 1) so that the pressure reducing valve seat (in the patent, the drawing number 1) is necessary for realizing the function of the electromagnetic valve, the volume is large, and the use of the electromagnetic valve is limited.
A typical two-position three-way inverse proportion pressure reducing solenoid valve structure is given in the chinese patent application No. 200880005948.9. The magnetic shunt structure is formed by combining a pole shoe (number 35 in the patent drawing), a stop iron (number 34 in the patent drawing) and an armature (number 36 in the patent drawing), so that the one-to-one correspondence relationship between the electromagnetic force output by the electromagnet and the current input to the coil is realized. The stepped main valve structure is adopted, and the function of the pressure regulating valve is realized. However, the step-type main valve has higher processing difficulty, strict requirements on processing equipment and quality management and higher batch production difficulty. The conventional magnetic shunt structure adopted by the electromagnetic valve has the defects that the gap between an armature (number 36 in the patent drawing) and a pole shoe (number 35 in the patent drawing) and the gap between a stop iron (number 34 in the patent drawing) and the armature (number 36 in the patent drawing) are large, the magnetic resistance is large, and the energy utilization rate of the electromagnetic valve is poor. Due to the limitation of the structure and the severe working environment, after the product is used for a long time, pollutants enter the electromagnet, so that the electromagnetic valve is blocked and fails.
Another two-position three-way reverse proportion pressure reducing solenoid valve structure is given in the chinese patent application No. 201210539934.3. The double-support-structure armature (number 8 in the attached patent drawing) is adopted, so that the manufacturing difficulty of parts is high (particularly in mass production), the requirement on the product assembly process is high, and the hidden danger of low product qualification rate exists. The main valve adopts a cylindrical piston structure, so that the processing requirement on an inner hole (number 2g in the patent drawing) on the valve core (number 2 in the patent drawing) is higher, the processing production beat of parts is slower, and the one-time straight-through rate of the parts is lower. Although the anti-pollution capability of the structure is higher than that of the structure in Chinese patent application No. 200880005948.9, the problem that the processing difficulty is high and the anti-pollution capability is not high enough still needs to be solved.
Disclosure of Invention
The invention provides a proportional electromagnetic valve and a pressure regulating device thereof, which are used for solving the technical problems that the existing proportional pressure reducing valve is high in processing difficulty, unstable in quality, limited in application range and low in pollution resistance, and a mechanical structure is blocked easily to cause the failure of the electromagnetic valve.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
the proportional electromagnetic valve comprises a yoke, a stop iron, an armature, a connector, a coil and a push rod, and is characterized by further comprising a pressure adjusting device;
the pressure regulating device comprises a valve body, a valve core and a valve seat; the valve body is internally provided with a first through hole along the axial direction, the valve core and the valve seat are both arranged in the first through hole, and the valve body, the valve core and the valve seat are coaxially arranged;
an oil inlet, a pressure regulating port and a first oil return port which are communicated with the first through hole are sequentially formed in the side wall of the valve body, wherein the first oil return port is positioned at one end close to the valve seat;
the valve core is characterized in that a first annular groove and a second annular groove are formed in the side wall of the valve core, a first pressure guiding hole is formed in the side wall, located between the first annular groove and the second annular groove, of the valve core, a pressure feedback hole is formed in the end face, close to the valve seat, of the valve core, the first pressure guiding hole is communicated with the pressure feedback hole through the second pressure guiding hole, and the second pressure guiding hole and the pressure feedback hole are both arranged along the axial direction of the valve core;
The oil inlet is arranged opposite to the first annular groove, the first oil return port is arranged opposite to the second annular groove, and the first pressure guiding hole is arranged opposite to the pressure regulating port; the side wall of the valve core, which is positioned at one side of the first pressure guiding hole far away from the valve seat, reciprocates along with the valve core, and the moving range of the valve core is between the oil inlet and the pressure regulating port to the pressure regulating port;
a spherical piston is arranged in the pressure feedback hole, and the outer diameter of the spherical piston is matched with the inner diameter of the pressure feedback hole;
one end of the valve seat is connected with the valve body, and the other end of the valve seat extends into the pressure feedback hole and is contacted with the spherical piston; the side wall of the valve seat, which is positioned outside the pressure feedback hole, is sleeved with a first elastic component, one end of the first elastic component is connected with the valve seat, and the other end of the first elastic component is connected with the valve core; one end of the valve seat fixedly connected with the valve body is provided with an oil path channel for communicating the first through hole with the outside;
the yoke, the stop iron and the armature are sleeved in sequence from outside to inside, a gap is reserved between the yoke and the stop iron, the top of the yoke is connected with the top of the stop iron through an upper magnetic circuit board, and the bottom of the yoke is connected with the bottom of the yoke through a lower magnetic circuit board; the stop iron is in sliding fit with the armature;
the stop iron is in a hollow column shape, and a second through hole is formed in the bottom of the stop iron;
the coil is coiled outside the stop iron and is positioned in a gap between the yoke and the stop iron; the coil is connected with an external power supply through a connector;
A third through hole is formed in the armature along the axial direction; one end of the ejector rod is fixed in the third through hole, and the other end of the ejector rod is arranged in the second through hole; the height of the armature iron is smaller than the height of the inner part of the stop iron;
one end of the valve core, which is far away from the valve seat, extends into the third through hole, and the ejector rod is positioned at the top of the valve core; the yoke iron is fixedly connected with the valve body;
the outer wall of the stop iron is provided with a first conical surface and a second conical surface along the circumferential direction, the small ends of the first conical surface and the small ends of the second conical surface are connected through a cylindrical surface arranged along the circumferential direction, and a magnetic breaker is sleeved outside the cylindrical surface.
Further, a limiting step is arranged at one end, close to the valve core, of the valve seat, and the limiting step is abutted against and matched with the end face of the valve body;
one end of the valve seat, which is far away from the valve core, is provided with a mounting boss along the circumferential direction, and the outer wall of the mounting boss is connected with the inner wall of the first through hole;
the oil way channels are arranged in two, are symmetrically arranged about the axis of the valve seat, are both arranged on the mounting boss and are axially arranged along the valve seat.
Further, a plurality of grooves are formed in the peripheral direction of the portion, attached to the side wall of the first through hole in the valve body, of the side wall of the valve core.
Further, a first mounting groove is formed in the side wall of the valve body, which is located at one side of the oil inlet, which is far away from the valve seat, along the circumferential direction, and a first sealing ring is arranged in the first mounting groove;
A second mounting groove is formed in the side wall of the valve body and located between the oil inlet and the pressure regulating port along the circumferential direction, and a second sealing ring is arranged in the second mounting groove;
a third mounting groove is formed in the side wall of the valve body between the pressure adjusting port and the first oil return port along the circumferential direction, and a third sealing ring is arranged in the third mounting groove;
a fourth mounting groove is formed in the side wall of the valve body, located on one side, close to the valve seat, of the first oil return opening, and a fourth sealing ring is arranged in the fourth mounting groove.
Further, the oil inlet, the pressure regulating port and the first oil return port are respectively provided with a filter screen, and the filter screens are respectively and hermetically connected to the side wall of the oil inlet, the side wall of the pressure regulating port and the side wall of the first oil return port.
Further, the cover plate is arranged at the top of the yoke and covers the third through hole;
the bottom of the stop iron is positioned at the outer edge of the second through hole and is provided with a gasket made of non-soft magnetic metal materials.
Further, a film is arranged between the stop iron and the armature iron;
the cross section of the magnetic circuit breaker is any one of triangle, circle or rectangle, and surrounds the cylindrical surface of the outer wall of the stop iron in a spiral line mode.
The invention also provides a proportional electromagnetic valve which comprises a yoke, a stop iron, an armature, a connector, a coil and a second elastic part; it is characterized by also comprising a pressure regulating device;
The pressure regulating device comprises a valve body, a valve core and a valve seat; the valve body is internally provided with a first through hole along the axial direction, the valve core and the valve seat are both arranged in the first through hole, and the valve body, the valve core and the valve seat are coaxially arranged;
the side wall of the valve body is sequentially provided with a second oil return port, a first oil return port, an oil outlet and an oil inlet which are communicated with the first through hole, wherein the oil inlet is positioned at one end close to the valve seat;
the valve core is provided with a first pressure guiding hole, a second pressure guiding hole is formed in the side wall of the valve core, which is positioned in the first annular groove, is provided with a pressure feedback hole, the end surface of the valve core, which is close to the valve seat, is provided with a second pressure guiding hole, the first pressure guiding hole is communicated with the pressure feedback hole, and the second pressure guiding hole and the pressure feedback hole are both arranged along the axial direction of the valve core;
the outer edge of the end surface of the valve core far away from the valve seat is provided with a fourth annular groove along the circumferential direction, the oil outlet is opposite to the third annular groove, and the second oil return port is opposite to the fourth annular groove;
a spherical piston is arranged in the pressure feedback hole, and the outer diameter of the spherical piston is matched with the inner diameter of the pressure feedback hole;
one end of the valve seat is connected with the valve body, and the other end of the valve seat extends into the pressure feedback hole and is contacted with the spherical piston; the side wall of the valve seat, which is positioned outside the pressure feedback hole, is sleeved with a first elastic component, one end of the first elastic component is connected with the valve seat, and the other end of the first elastic component is connected with the valve core; one end of the valve seat fixedly connected with the valve body is provided with an oil path channel for communicating the first through hole with the outside;
The yoke, the stop iron and the armature iron are sleeved in sequence from outside to inside, wherein the top of the yoke is closed, a gap is reserved between the yoke and the stop iron, the coil is coiled outside the stop iron and is positioned in the gap between the yoke and the stop iron, and the coil is connected with an external power supply through a connector; the stop iron is in sliding fit with the armature; the yoke iron is fixedly connected with the valve body;
the stop iron is in a hollow column shape, and a blind hole is formed in the inner surface of the top;
the upper end face of the armature is provided with a first mounting hole which is opposite to the blind hole, the lower end face of the armature is provided with a second mounting hole, the first mounting hole is communicated with the second mounting hole, and the inner diameter of the second mounting hole is smaller than that of the first mounting hole; the height of the armature is smaller than the inner height of the stop iron;
one end of the second elastic component is connected with the bottom of the blind hole, and the other end of the second elastic component is connected with the bottom of the first mounting hole;
the valve core is positioned below the armature, and the diameter of the valve core is larger than the inner diameter of the second mounting hole; the outer diameter of the armature is larger than the inner diameter of the first through hole;
the outer wall of the stop iron is provided with a first conical surface and a second conical surface along the circumferential direction, the small ends of the first conical surface and the small ends of the second conical surface are connected through a cylindrical surface arranged along the circumferential direction, and a magnetic breaker is sleeved outside the cylindrical surface.
Further, a limiting step is arranged at one end, close to the valve core, of the valve seat, and the limiting step is abutted against and matched with the end face of the valve body;
one end of the valve seat, which is far away from the valve core, is provided with a mounting boss along the circumferential direction, and the outer wall of the mounting boss is connected with the inner wall of the first through hole;
two oil path channels are symmetrically arranged about the axis of the valve seat, are arranged on the mounting boss and are axially arranged along the valve seat;
and a plurality of grooves are formed in the peripheral direction of the part, which is attached to the side wall of the first through hole in the valve body, of the side wall of the valve core.
Further, a gasket made of non-soft magnetic metal materials is arranged on the inner surface of the top end of the stop iron and positioned at the outer edge of the blind hole;
a film is arranged between the stop iron and the armature;
the cross section of the magnetic circuit breaker is any one of triangle, circle or rectangle, and surrounds the cylindrical surface of the outer wall of the stop iron in a spiral line mode;
the yoke is fixedly connected with the valve body through a lower magnetic circuit plate, and the lower magnetic circuit plate is arranged along the radial direction.
In addition, the invention also provides a pressure regulating device in the proportional electromagnetic valve, which comprises a valve body, a valve core and a valve seat, wherein a first through hole is formed in the valve body along the axial direction, the valve core and the valve seat are both arranged in the first through hole, and the valve body, the valve core and the valve seat are coaxially arranged; it is characterized in that the utility model is characterized in that,
An oil inlet, a pressure regulating port and a first oil return port which are communicated with the first through hole are sequentially formed in the side wall of the valve body, wherein the first oil return port is positioned at one end close to the valve seat;
one end of the valve core, which is far away from the valve seat, is connected with an external driving part, and the valve core is driven to reciprocate relative to the valve body; the valve core is provided with a first annular groove and a second annular groove on the side wall, a first pressure guiding hole is formed in the side wall, located between the first annular groove and the second annular groove, of the valve core, a pressure feedback hole is formed in the end face, close to the valve seat, of the valve core, the first pressure guiding hole is communicated with the pressure feedback hole through the second pressure guiding hole, and the second pressure guiding hole and the pressure feedback hole are both arranged along the axial direction of the valve core;
a limiting step is arranged at one end of the valve seat, which is close to the valve core, and the limiting step is abutted against the end face of the valve body to be matched;
and a plurality of grooves are formed in the peripheral direction of the part, which is attached to the side wall of the first through hole in the valve body, of the side wall of the valve core.
The oil inlet is arranged opposite to the first annular groove, the first oil return port is arranged opposite to the second annular groove, and the first pressure guiding hole is arranged opposite to the pressure regulating port; the side wall of the valve core, which is positioned at one side of the first pressure guiding hole far away from the valve seat, reciprocates along with the valve core, and the moving range of the valve core is between the oil inlet and the pressure regulating port to the pressure regulating port;
A spherical piston is arranged in the pressure feedback hole, and the outer diameter of the spherical piston is matched with the inner diameter of the pressure feedback hole;
one end of the valve seat is connected with the valve body, and the other end of the valve seat extends into the pressure feedback hole and is contacted with the spherical piston; the side wall of the valve seat, which is positioned outside the pressure feedback hole, is sleeved with a first elastic component, one end of the first elastic component is connected with the valve seat, and the other end of the first elastic component is connected with the valve core; one end of the valve seat fixedly connected with the valve body is provided with an oil path channel for communicating the first through hole with the outside.
Compared with the prior art, the invention has the following beneficial effects:
1. the first proportional electromagnetic valve has high magnetic energy utilization rate, compact structure and small volume. The friction pair is formed by the film and the armature, the friction coefficient is small, the pollution resistance is good, and the pressure regulating performance of the electromagnetic valve is excellent. The electromagnetic valve has good assembly stability, low processing difficulty and good mass production quality stability.
2. The second proportional electromagnetic valve adopts a proportional electromagnet structure with an integrated stop iron and a pole shoe, and has high magnetic energy utilization rate, compact structure and small volume. The friction pair is formed by the film and the armature, the friction coefficient is small, the pressure regulating performance of the electromagnetic valve is excellent, the electromagnetic valve has the function of cleaning pollutants, and the anti-pollution capability is good. The assembly stability is good, the processing difficulty is low, and the mass production quality stability is good.
3. The pressure regulating device in the proportional electromagnetic valve greatly reduces the processing quality requirement of the inner hole of the pressure feedback cavity, and particularly when the working pressure of the regulating valve is higher, the processing difficulty of the small hole in the valve core is obviously reduced. The ball-shaped piston can roll in the inner hole of the valve core, so that the influence of friction on the movement of the valve core is greatly reduced, the performance reduction and failure probability of the pressure regulating valve caused by the clamping of the valve core are reduced, and the working reliability of pressure regulation is improved. The ball-type piston can roll in the valve core, so that a small fit clearance can be adopted between the ball-type piston and the inner hole of the valve core, the relative movement is flexible, the leakage of oil products in the pressure feedback cavity of the electromagnetic valve outwards through the fit clearance is reduced, particularly in the working condition that the working pressure of the pressure regulating valve is high, the working pressure range of the pressure regulating valve is enlarged, and the performance of the pressure regulating valve is improved.
Drawings
FIG. 1 is a schematic view of an embodiment of a pressure regulating device in a proportional solenoid valve according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a proportional solenoid valve according to an embodiment of the invention;
FIG. 3 is a schematic diagram of the force and pressure applied to the structure of FIG. 2 in accordance with the present invention;
FIG. 4 is a schematic diagram of a second proportional solenoid valve according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of the stress and pressure of the structure of FIG. 4 according to the present invention.
The valve comprises a 1-valve body, a 2-valve core, a 3-valve seat, a 4-first through hole, a 5-oil inlet, a 6-pressure regulating port, a 7-first oil return port, an 8-first annular groove, a 9-second annular groove, a 10-first pressure guiding hole, a 11-pressure feedback hole, a 12-second pressure guiding hole, a 13-spherical piston, a 14-first elastic component, a 15-oil path channel, a 16-first mounting groove, a 17-first sealing ring, a 18-second mounting groove, a 19-second sealing ring, a 20-third mounting groove, a 21-third sealing ring, a 22-fourth mounting groove, a 23-fourth sealing ring, a 24-filter screen, a 25-limiting step, a 26-mounting boss, a 27-groove, a 28-yoke, a 29-retaining iron, a 30-armature, a 31-connector, a 32-coil, a 33-upper magnetic circuit board, a 34-lower magnetic circuit board, a 35-third through hole, a 36-second through hole, a 37-ejector pin, a 38-gasket, a 39-cover plate, a 40-first conical surface, a 41-second conical surface, a 42-fourth conical surface, a 43-44, a second cylindrical surface, a 45-fourth sealing ring, a 48-fourth annular groove, a 48-fourth mounting hole, a fourth annular groove, a 48-annular groove and an oil return port.
Detailed Description
The invention is described in further detail below with reference to the attached drawing figures:
example 1
As shown in fig. 1 to 3, the invention provides a proportional solenoid valve, which comprises a yoke 28, a stop iron 29, an armature 30, a connector 31, a coil 32, a push rod 37 and a pressure regulating device, wherein the pressure regulating device is regulated by adopting a spherical piston type structure and comprises a valve body 1, a valve core 2 and a valve seat 3, a first through hole 4 is formed in the valve body 1 along the axial direction, the valve core 2 and the valve seat 3 are both arranged in the first through hole 4, and the valve body 1, the valve core 2 and the valve seat 3 are coaxially arranged.
The valve body 1 is made of metal materials, the whole outer part of the valve body is in a multi-section cylinder shape, an oil inlet 5, a pressure adjusting port 6 and a first oil return port 7 which are communicated with the first through hole 4 are sequentially formed in the side wall of the valve body 1, wherein the first oil return port 7 is positioned at one end close to the valve seat 3, two oil inlets 5, two pressure adjusting ports 6 and two first oil return ports 7 can be respectively arranged, and the two oil inlets, the pressure adjusting ports 6 and the two first oil return ports 7 are symmetrically arranged relative to the axis of the valve body 1. One end of the valve body 1, which is close to the oil inlet 5, can be fixedly connected with an external driving part, and one end, which is close to the first oil return opening 7, can be installed in a device needing pressure adjustment.
A first mounting groove 16 is formed in the side wall of the valve body 1, located at one side of the oil inlet 5, far away from the valve seat 3, along the circumferential direction, and a first sealing ring 17 is arranged in the first mounting groove 16. A second mounting groove 18 is formed in the side wall of the valve body 1 between the oil inlet 5 and the pressure regulating port 6 along the circumferential direction, and a second sealing ring 19 is arranged in the second mounting groove 18. A third mounting groove 20 is formed in the side wall of the valve body 1 between the pressure adjusting port 6 and the first oil return port 7 along the circumferential direction, and a third sealing ring 21 is arranged in the third mounting groove 20. A fourth mounting groove 22 is formed in the side wall of the valve body 1 and located at one side of the first oil return port 7 close to the valve seat 3 along the circumferential direction, and a fourth sealing ring 23 is arranged in the fourth mounting groove 22. The first sealing ring 17, the second sealing ring 19, the third sealing ring 21 and the fourth sealing ring 23 are used for realizing the sealing between the oil inlet 5 and the pressure regulating port 6, the sealing between the pressure regulating port 6 and the first oil return port 7 and the sealing between the valve body 1 and a mechanical mechanism of an externally mounted valve plate. The first sealing ring 17, the second sealing ring 19, the third sealing ring 21 and the fourth sealing ring 23 are all made of corrosion-resistant high-low temperature-resistant rubber, and the inner diameter and the wire diameter can be adjusted according to the installation requirement.
The first through hole 4 in the valve body 1 is used for placing the valve core 2, the valve core 2 can slide back and forth in the first through hole 4 in the valve body 1, and the valve seat 3 is tightly connected with the inner wall of the first through hole 4 in the valve body 1.
The valve core 2 is made of metal materials, can be specially processed to improve the wear resistance, has a multi-section cylindrical structure as a whole, and is connected with an external driving part by which the valve core 2 is driven to reciprocate relative to the valve body 1, wherein one end of the valve core, which is far away from the valve seat 3, extends out of the valve body 1. The valve core 2 is provided with a first annular groove 8 and a second annular groove 9 on the side wall, a first pressure guiding hole 10 is formed in the side wall, located between the first annular groove 8 and the second annular groove 9, of the valve core 2, a pressure feedback hole 11 is formed in the end face, close to the valve seat 3, of the valve core 2, the first pressure guiding hole 10 is communicated with the pressure feedback hole 11 through a second pressure guiding hole 12, the second pressure guiding hole 12 and the pressure feedback hole 11 are both arranged along the axis direction of the valve core 2, and the second pressure guiding hole 12 is communicated to the outer cylindrical surface of the valve core 2 through the first pressure guiding hole 10. The valve core 2 reciprocates relative to the valve body 1, and realizes the function of regulating the pressure supplied by the oil inlet 5 on the valve body 1 to a preset value and outputting the pressure from the pressure regulating port 6 on the valve body 1. The first pressure guiding hole 10 on the valve core 2 is used for communicating the pressure of the pressure regulating port 6 into the second pressure guiding hole 12 and the pressure feedback hole 11, so that a hydraulic feedback force is formed on the valve core 2, and in addition, a plurality of grooves 27 are formed in the peripheral direction of the part, which is attached to the side wall of the valve core 2 and the side wall of the first through hole 4 in the valve body 1, for reducing the hydraulic locking force.
The oil inlet 5 is arranged opposite to the first annular groove 8, the first oil return port 7 is arranged opposite to the second annular groove 9, and the first pressure guiding hole 10 is arranged opposite to the pressure regulating port 6. The side wall of the valve core 2, which is positioned on the side of the first pressure guiding hole 10, which is far away from the valve seat 3, reciprocates along with the valve core 2, and the moving range of the side wall is between the oil inlet 5 and the pressure regulating port 6 to the pressure regulating port 6. The side wall of the valve core 2 between the first annular groove 8 and the second annular groove 9 can be partially attached to the inner wall of the valve body 1 between the oil inlet 5 and the pressure regulating port 6 when the valve core 2 moves in a direction away from the valve seat 3, so that a channel between the oil inlet 5 and the pressure regulating port 6 is closed; when the valve core 2 moves towards the direction close to the valve seat 3, the side wall of the valve core 2 between the first annular groove 8 and the second annular groove 9 can be completely not attached to the inner wall of the valve body 1 between the oil inlet 5 and the pressure regulating port 6, so that a channel between the oil inlet 5 and the pressure regulating port 6 is opened, and meanwhile, the channel between the pressure regulating port 6 and the first oil return port 7 is closed.
The ball-shaped piston 13 is of a ball structure, the size of which meets the standard steel balls contained in national standards or other standards, and is composed of wear-resistant metal. The ball-shaped piston 13 is placed in the pressure feedback hole 11 on the valve core 2, the outer diameter of the ball-shaped piston 13 is matched with the inner diameter of the pressure feedback hole 11, the ball-shaped piston 13 can slide and roll in the pressure feedback hole 11, and the ball-shaped piston 13 is tightly attached to the valve seat 3 during working.
One end of the valve seat 3 is connected with the valve body 1, the other end of the valve seat extends into the pressure feedback hole 11 and is tightly attached to the spherical piston 13, a first elastic component 14 is sleeved on the side wall of the valve seat 3 outside the pressure feedback hole 11, one end of the first elastic component 14 is connected with the valve seat 3, the other end of the first elastic component is sleeved with the valve core 2, the first elastic component 14 can adopt a cylindrical compression spring, and the spring is made of metal materials. The outside whole of disk seat 2 is multistage cylinder structure, constitute by metal material, disk seat 3 is close to the one end of case 2 and is equipped with spacing step 25, spacing step 25 offsets the cooperation with valve body 1 terminal surface, when case 2 moves to certain position, offset with spacing step 25, case 2 no longer moves to disk seat 3 direction, disk seat 3 is kept away from the one end of case 2 and is equipped with installation boss 26 along circumference, installation boss 26 outer wall links to each other with first through-hole 4 inner wall, oil circuit passageway 15 is provided with two, set up about disk seat 3 axis symmetry, two oil circuit passageways 15 are all offered on installation boss 26, and set up along disk seat 3 axial, run through the up-down end of installation boss 26.
The oil inlet 5, the pressure regulating port 6 and the first oil return port 7 are respectively provided with a filter screen 24, and the filter screens 24 are respectively and hermetically connected to the side wall of the oil inlet 5, the side wall of the pressure regulating port 6 and the side wall of the first oil return port 7, and the filter screens 24 are made of metal meshes and plastic brackets through injection molding and are sleeved on the outer cylindrical surface of the valve body 1 and are used for filtering pollutants in oil products.
For convenience of description, the end of the valve element 2 away from the valve seat 3 is defined as the left end, and the end near the valve seat 3 is defined as the right end:
when the driving force input from the left end of the valve core 2 is 0, the first elastic component 14 pushes the valve core 2 to close an oil path between the oil inlet 5 and the pressure regulating port 5, the pressure regulating port 6 is communicated with the first oil return port 5, the oil pressure in the pressure regulating port 6 is relieved through the first oil return port 7 (the first oil return port 7 can be communicated with the external atmosphere by default here), and the pressure of the pressure regulating port 6 is zero.
When the driving force is input to the left end of the valve core 2, the valve core 2 is driven to move rightwards, meanwhile, the first elastic component 14 is compressed, an oil way between the oil inlet 5 and the pressure regulating port 6 is opened, the oil pressure in the pressure regulating port 6 and the first oil return port 7 are closed, the pressure of the oil inlet 5 reaches the pressure regulating port 6, and the pressure reaches the second pressure guiding hole 12 and the pressure feedback hole 11 through the first pressure guiding hole 10, and acts on the spherical piston 13 to push the spherical piston 13 to be close to the valve seat 3, so that the oil pressure in the pressure feedback hole 11 is kept, and the oil pressure in the pressure feedback hole 11 acts on the valve core 2 to form a hydraulic feedback force opposite to the input driving force.
When the hydraulic feedback force is greater 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 5 and the pressure regulating port 6 is closed, the pressure regulating port 6 is communicated with the first oil return port 7, and the oil pressure in the pressure regulating port 6 and the oil pressure in the pressure feedback hole 11 are decompressed through the first oil return port 7. When the hydraulic feedback force of the oil pressure in the pressure feedback hole 11 acting on the valve core 2 is smaller than the input driving force, the valve core 2 moves right again to repeat the repeated motion, so that the valve core 2 reciprocates and oscillates, the oil pressure of the pressure regulating port 6 is equal to the oil pressure in the pressure feedback hole 11, and the hydraulic force acting on the valve core 2 is balanced with the input driving force.
When the input driving force is larger than the sum of the pressure of the oil inlet 5 and the pressure of the pressure feedback hole 11, the valve core 2 moves to the right to the maximum position under the action of the input driving force, the pressure regulating port 6 is communicated with the first oil return port 7, an oil way between the pressure regulating port 6 and the first oil return port 7 is closed, the oil pressure of the oil inlet 5 enters the pressure regulating port 6 and the pressure feedback hole 11, the hydraulic feedback force born by the valve core 2 is smaller than the input driving force, the valve core 2 is kept at the rightmost end, and the oil pressure of the pressure regulating port 6 is equal to the oil pressure of the oil inlet 5.
As shown in fig. 2, the yoke 28, the stop iron 29 and the armature 30 are sleeved in sequence from outside to inside, a gap is reserved between the yoke 28 and the stop iron 29, the top of the yoke 28 and the top of the stop iron 29 are connected through an upper magnetic circuit plate 33, the bottom of the yoke is connected through a lower magnetic circuit plate 34, the whole outside of the yoke 28 is in a thin-walled cylinder shape and is made of soft magnetic materials, the lower end of the yoke 28 is riveted with the valve body 1 into a whole, and the upper end of the yoke is riveted with the cover plate 39 into a whole. The stopper 29 and the armature 30 are in sliding fit, a film is arranged between the stopper 29 and the armature 30, the armature 30 can slide back and forth in the film, and the film is in a thin-wall cylinder shape and is made of wear-resistant and high-temperature-resistant plastic. The coil 32 is coiled outside the stop iron 29, is positioned in a gap between the yoke 28 and the stop iron 29, the coil 32 is connected with an external power supply through the connector 31, and the coil 32 is integrally cylindrical after coiling and is composed of a plastic part and an enameled wire. The upper magnetic circuit plate 33 is a circular sheet, is made of soft magnetic metal material, the bottom is attached to the coil 32, is sleeved on the outer circle of the upper end of the stop iron 29, the lower magnetic circuit plate 34 is a circular sheet, is made of soft magnetic metal material, the top is attached to the coil 32, and the bottom is attached to the valve body 1.
The armature 30 is made of soft magnetic materials, the whole outside is cylindrical, a third through hole 35 is formed in the inner portion along the axial direction, the stop iron 29 is hollow and cylindrical, a second through hole 36 is formed in the bottom portion, one end of the ejector rod 37 is fixed in the third through hole 35, the other end of the ejector rod is arranged in the second through hole 36, the lower end of the ejector rod 37 is tightly attached to the upper end face of the valve core 2 during operation, the height of the armature 30 is smaller than the inner height of the stop iron 29, a gasket 38 made of non-soft magnetic metal materials is arranged at the outer edge of the second through hole 36 at the bottom of the stop iron 29, the gasket 38 is a circular ring sheet, the ejector rod 37 and the armature 30 are riveted into a whole, the whole outside of the ejector rod 37 is cylindrical and made of metal materials, and one end, far away from the valve seat 3, of the valve core 2 extends into the third through hole 35.
In addition, a cover 39 is provided on the top of the yoke 28 to cover the third through hole 35, so that the armature 30 is prevented from coming out of the stopper 29 when moving away from the valve seat 3 along with the plunger 37. The cover 39 is a circular thin plate structure made of a non-magnetically conductive metal material, and has a lower portion bonded to the upper magnetic circuit plate 33 and integrally riveted to the upper end of the yoke 28.
The outside of the stop iron 29 is integrally cylindrical, a first conical surface 40, a second conical surface 41 and a cylindrical surface 42 are arranged on the outer cylindrical surface along the circumferential direction, the first conical surface 40 is positioned on one side far away from the valve seat 3, the small ends of the first conical surface 40 and the small ends of the second conical surface 41 are connected through the cylindrical surface 42, a magnetic breaker is arranged on the cylindrical section 42, the cross section of the magnetic breaker is triangular, circular or rectangular, the magnetic breaker surrounds the outer cylindrical surface 42 of the stop iron 29 in a spiral line mode, and the magnetic breaker is made of soft magnetic materials. The first conical surface 40, the cylindrical surface 42, the second conical surface 41 and the magnetic circuit breaker arranged on the cylindrical surface 42 are arranged on the outer wall of the stop iron 29 and form a magnetic shunt structure in the proportional electromagnet together with the armature 30, wherein the first conical surface 40 plays a role of the stop iron in the traditional proportional electromagnet structure, the second conical surface 41 plays a role of a pole shoe, and the cylindrical surface 42 and the magnetic circuit breaker play an air gap role between the stop iron and the pole shoe.
The working principle of the invention is further explained with reference to fig. 2 and 3: the proportional solenoid valve of the present invention is actually a proportional pressure reducing solenoid valve, in which, in operation, liquid is fed into the first through hole 4 in the valve body 1 through the oil inlet 5 in the valve body 1.
When not energized, the valve core 2 is pushed up by the first elastic member 14, the upper end abuts against the plunger 37 and the armature 30 is abutted against the lower surface of the cover plate 39 by the plunger 37. The oil inlet 5 is not communicated with the pressure regulating port 6, the pressure regulating port 6 is communicated with the liquid return port 7 and is connected with the atmosphere, and the pressure at the pressure regulating port 6 is 0 (relative to the reading value of an atmospheric pressure meter).
When the electromagnetic valve is electrified, the electromagnetic force F I The armature 30 is driven, electromagnetic force is downwards output to the valve core 2 through the ejector rod 37 which is connected with the armature 30 into a whole, and the valve core 2 receives electromagnetic force F I Driving against the return spring force F of the first resilient member 14 Resetting The oil inlet 5 on the valve body 1 is communicated with the pressure regulating port 6 on the valve body 1, the pressure regulating port 6 and the liquid return port 7 are closed, liquid reaches the pressure regulating port 6 from the oil inlet 5, the liquid pressure is established at the pressure regulating port 6, meanwhile, the liquid enters the second pressure guiding hole 12 through the first pressure guiding hole 10 on the valve core 2 and reaches the pressure feedback hole 11, the spherical piston 13 plays a sealing role on the pressure feedback hole 11, the pressure feedback hole 11 establishes liquid pressure, the liquid pressure acts on the cross section area of the pressure feedback hole 11, and an upward hydraulic feedback force F is generated Feedback of . Due to the hydraulic feedback force F Feedback of Greater than electromagnetic force F I The valve core 2 receives a return spring force F Resetting Hydraulic feedback force and electromagnetic force F I The formed upward resultant force moves upward, the oil inlet 5 is closed with the pressure regulating port 6 on the valve body 1, the pressure regulating port 6 is communicated with the first oil return port 7, the hydraulic feedback force at the pressure regulating port 6 is reduced, the hydraulic pressure in the pressure feedback hole 11 is reduced, the hydraulic feedback force acting on the valve core 2 is reduced, and the valveThe core 2 repeats the above downward movement so as to circulate, thereby obtaining a relatively stable pressure-regulating mouth pressure, i.e., P An outlet 。
When the input electric signal is maximum, namely the oil inlet pressure P Liquid supply The product of the cross section of the pressure feedback hole 11 on the valve core 2 and the cross section of the pressure feedback hole is smaller than F I The valve core 2 is subjected to electromagnetic force F I The oil inlet 5 is communicated with the pressure regulating port 6 by driving downward movement, meanwhile, the pressure regulating port 6 and the first oil return port 7 are closed, and the product of the liquid pressure in the pressure feedback hole 11 communicated with the pressure regulating port 6 and the cross section of the pressure feedback hole 11 is smaller than F I The valve core 2 keeps a downward movement state and is not regulated in a reciprocating way to realize the pressure regulating port pressure P An outlet With the pressure P of the oil inlet Liquid supply The same applies.
In the operation process of the electromagnetic valve, the proportional electromagnetic valve not only provides the output electromagnetic force which is approximately in one-to-one linear relation with the input signal, but also realizes stable pressure regulating port pressure P on the valve core 2 An outlet During the reciprocating oscillation operation, when the distance between the armature 30 and the bottom inner surface of the stopper 29 is changed, the electromagnetic force F I The pressure is basically kept unchanged, so that the resultant force born by the valve core 2 is stable, and the stable pressure regulating port pressure P can be realized with quicker and fewer reciprocating oscillation times An outlet 。
The solenoid valve balance equation is:
F I ＝F an outlet +F Resetting ；
F I ＝K×I，F An outlet ＝P An outlet ×S Feedback of
In the above formula, K is a proportional electromagnet coefficient, I is an input equivalent current, S Feedback of An effective area for the pressure feedback hole to act on the liquid pressure.
Thereby obtaining the following steps:
the pressure adjusting device in the first embodiment can also be applied alone, and the structure and principle are the same as those described above.
Example two
As shown in fig. 4, the present invention also provides another proportional solenoid valve, and the second embodiment is different from the first embodiment in that:
the yoke 28 is formed in a cylindrical shape and made of a soft magnetic metal material, and is riveted integrally with the lower magnetic circuit plate 34. The stop iron 29 is in a hollow column shape, the inner surface of the top is provided with a blind hole 43, the upper end surface of the armature 30 is provided with a first mounting hole 44 which is opposite to the blind hole 43, the lower end surface is provided with a second mounting hole 45, the first mounting hole 44 is communicated with the second mounting hole 45, the inner diameter of the second mounting hole 45 is smaller than that of the first mounting hole 44, the height of the armature 30 is smaller than that of the inside of the stop iron 29, the armature 30 can have a certain movable range in the stop iron 29, one end of a second elastic component 46 is connected with the bottom of the blind hole 43, the other end of the second elastic component 46 is connected with the bottom of the first mounting hole 44, the second elastic component 46 is coiled into a cylindrical compression spring, the valve core 2 is positioned below the armature 30, the diameter of the valve core 2 is larger than that of the second mounting hole 45, the outer diameter of the armature 30 is larger than that of the first through hole 4, the top of the valve core 30 is propped against the top of the valve body 1 when the armature 30 moves to the lowest, and the top of the valve core 2 is attached to the bottom of the armature 30.
The inner surface of the top end of the stop iron 29 is provided with a gasket 38 made of non-soft magnetic metal material at the outer edge of the blind hole 43, the gasket 38 is a circular sheet and is made of the non-soft magnetic metal material and is tightly attached to the inner surface of the top end of the stop iron 29.
The armature 30 is made of soft magnetic material, a film is arranged between the stop iron 29 and the armature 30, the armature 30 can slide back and forth in the film 6, the film and the armature 30 form a friction pair structure, the film plays a role of a sliding bearing, the connector 31 is shaped according to the installation requirement, is made of a plastic part and a metal part, is externally connected with the yoke 28, and can be connected with the coil 32 into a whole. The film is made of wear-resistant and high-temperature-resistant plastic, and the height of the film is equal to the length of the inner hole of the stop iron 29.
The yoke 28 is fixedly connected with the valve body 1 through a lower magnetic circuit plate 34, the lower magnetic circuit plate 34 is arranged along the radial direction, the lower magnetic circuit plate 34 is a circular ring-shaped sheet and is made of soft magnetic metal material, and is connected with the valve body 1 into a whole, and is also connected with the yoke 28 into a whole through riveting.
In addition, the pressure regulating device has slightly different structures, and specifically, the pressure regulating device comprises a valve body 1, a valve core 2 and a valve seat 3. The valve body 1 is internally provided with a first through hole 4 along the axial direction, the valve core 2 and the valve seat 3 are both arranged in the first through hole 4, and the valve body 1, the valve core 2 and the valve seat 3 are coaxially arranged. The side wall of the valve body 1 is sequentially provided with a second oil return port 49, a first oil return port 7, an oil outlet 47 and an oil inlet 5 which are communicated with the first through hole 4, wherein the oil inlet 5 is positioned at one end close to the valve seat 3. The side wall of the valve core 2 is provided with a third annular groove 48, the side wall of the valve core 2 positioned in the third annular groove 48 is provided with a first pressure guiding hole 10, the end surface of the valve core 2 close to the valve seat 3 is provided with a pressure feedback hole 11, the first pressure guiding hole 10 is communicated with the pressure feedback hole 11 through a second pressure guiding hole 12, and the second pressure guiding hole 12 and the pressure feedback hole 11 are both arranged along the axial direction of the valve core 2. The outer edge of the end surface of the valve core 2 far away from the valve seat 3 is provided with a fourth annular groove 50 along the circumferential direction, an oil outlet 47 is opposite to the third annular groove 48, and a second oil return port 49 is opposite to the fourth annular groove 50. A spherical piston 13 is arranged in the pressure feedback hole 11, and the outer diameter of the spherical piston 13 is matched with the inner diameter of the pressure feedback hole 11. The valve seat 3 has one end connected to the valve body 1 and the other end extending into the pressure feedback hole 11 to contact the ball piston 13. The side wall of the valve seat 3 outside the pressure feedback hole 11 is sleeved with a first elastic component 14, one end of the first elastic component 14 is connected with the valve seat 3, and the other end is connected with the valve core 2. One end of the valve seat 3 fixedly connected with the valve body 1 is provided with an oil path passage 15 for communicating the first through hole 4 with the outside.
The present invention will be further described with reference to fig. 4 and 5, in which the proportional solenoid valve of the second embodiment is actually an inverse proportional pressure reducing solenoid valve with a structure of a ball-type piston with an integrated stopper and pole shoe.
When the valve is in operation in the non-power supply state, the second elastic component 46 provides installation pre-tightening force, the installation pre-tightening force is transmitted to the valve core 2 through the armature 30, the valve core 2 is pressed to be close to the valve seat 3, the oil outlet 47 is communicated with the oil inlet 5, and a channel between the oil outlet 47 and the first oil return port 7 is closed. Liquid enters a cavity between the inner hole of the valve body 1 and the valve core 2, flows out of the valve body 1 from the oil outlet 47, and is externally supplied to build pressure. At the same time, the pressure flows to the second pressure guiding hole 12 through the first pressure guiding hole 10 and reaches the pressure inverseA feed-back hole 11, pressure is built in the pressure feed-back hole 11, and the pressure in the pressure feed-back hole 11 acts on the hydraulic feed-back area of the valve core 2 to form a hydraulic feed-back force F Feedback of And an upward return spring force F Resetting The resultant force pushes the valve core 2 to move upwards, a channel between the oil outlet 47 and the first oil return port 7 is closed, and a channel between the oil outlet 47 and the first oil return port 7 is opened. Liquid enters a cavity between an inner hole of the valve body 1 and the valve core 2 from the oil outlet 47, is discharged from the oil inlet 5, the pressure of the oil outlet 47 is obviously reduced, the pressure in a pressure feedback hole 11 communicated with the oil outlet 47 is reduced, and the upward hydraulic feedback force F acts on the valve core 2 Feedback of And return spring force F Resetting Is smaller than the downward main spring force F of the downward main spring Main spring The valve element 2 moves downward and then repeatedly moves in this way, resulting in a relatively stable outlet pressure P An outlet 。
When the electromagnetic valve is electrified, the reciprocating process of the valve core 2 and the armature 30 is the same, and the electromagnetic attraction force F is the same I The direction is always upward, the valve core 2 is subjected to upward electromagnetic force F I Force F of return spring Resetting Hydraulic feedback force F Feedback of And a downward main spring force F Main spring The driving valve core 2 and the armature 30 are formed together to reciprocate so as to realize the outlet pressure P An outlet Is provided.
When the pressure at the oil inlet 5 is higher than the rated operating pressure set by the solenoid valve, the solenoid valve operates in the same manner as described above. When the hydraulic feedback chamber pressure P An outlet With hydraulic feedback area S Feedback of Formed hydraulic feedback force F Feedback of Less than F Main spring When the outlet pressure of the electromagnetic valve can realize pressure regulation capability, but the outlet pressure P An outlet The maximum value is the inlet pressure P An inlet The electromagnetic valve is in a normally open state, continuously supplies oil to the outlet and at the outlet pressure P An outlet To 0 (typically preset to a pressure of 0 or very low, with negligible estimation of 0), the solenoid valve still has good pressure regulation characteristics.
The solenoid valve balance equation is:
F main spring ＝F I +F An outlet +F Resetting
F I ＝K×I，F An outlet ＝P An outlet ×S Feedback of Thereby obtaining:/>

Claims (10)

1. the utility model provides a proportion solenoid valve, includes yoke (28), stop iron (29), armature (30), connector (31), coil (32) and ejector pin (37), its characterized in that: the device also comprises a pressure regulating device;
the pressure regulating device comprises a valve body (1), a valve core (2) and a valve seat (3); a first through hole (4) is formed in the valve body (1) along the axial direction, the valve core (2) and the valve seat (3) are both arranged in the first through hole (4), and the valve body (1), the valve core (2) and the valve seat (3) are coaxially arranged;
an oil inlet (5), a pressure regulating port (6) and a first oil return port (7) which are communicated with the first through hole (4) are sequentially formed in the side wall of the valve body (1), wherein the first oil return port (7) is positioned at one end close to the valve seat (3);
a first annular groove (8) and a second annular groove (9) are formed in the side wall of the valve core (2), a first pressure guiding hole (10) is formed in the side wall, located between the first annular groove (8) and the second annular groove (9), of the valve core (2), a pressure feedback hole (11) is formed in the end face, close to the valve seat (3), of the valve core (2), the first pressure guiding hole (10) is communicated with the pressure feedback hole (11) through a second pressure guiding hole (12), and the second pressure guiding hole (12) and the pressure feedback hole (11) are all arranged along the axial direction of the valve core (2);
The oil inlet (5) is opposite to the first annular groove (8), the first oil return port (7) is opposite to the second annular groove (9), and the first pressure guiding hole (10) is opposite to the pressure regulating port (6); the side wall of the valve core (2) positioned at one side of the first pressure guiding hole (10) far away from the valve seat (3) reciprocates along with the valve core (2), and the moving range of the valve core is between the oil inlet (5) and the pressure regulating port (6) to the pressure regulating port (6);
a spherical piston (13) is arranged in the pressure feedback hole (11), and the outer diameter of the spherical piston (13) is matched with the inner diameter of the pressure feedback hole (11);
one end of the valve seat (3) is connected with the valve body (1), and the other end of the valve seat extends into the pressure feedback hole (11) and is contacted with the spherical piston (13); the side wall of the valve seat (3) positioned outside the pressure feedback hole (11) is sleeved with a first elastic component (14), one end of the first elastic component (14) is connected with the valve seat (3), and the other end is connected with the valve core (2); one end of the valve seat (3) fixedly connected with the valve body (1) is provided with an oil path channel (15) for communicating the first through hole (4) with the outside;
the yoke (28), the stop iron (29) and the armature (30) are sleeved in sequence from outside to inside, a gap is reserved between the yoke (28) and the stop iron (29), the tops of the yoke (28) and the stop iron (29) are connected through an upper magnetic circuit plate (33), and the bottoms of the yoke and the stop iron are connected through a lower magnetic circuit plate (34); the stop iron (29) is in sliding fit with the armature (30);
The stop iron (29) is in a hollow column shape, and a second through hole (36) is formed in the bottom of the stop iron;
the coil (32) is coiled outside the stop iron (29) and is positioned in a gap between the yoke (28) and the stop iron (29); the coil (32) is connected with an external power supply through a connector (31);
a third through hole (35) is formed in the armature (30) along the axial direction; one end of the ejector rod (37) is fixed in the third through hole (35), and the other end of the ejector rod is arranged in the second through hole (36); the height of the armature (30) is smaller than the internal height of the stop iron (29);
one end of the valve core (2) far away from the valve seat (3) extends into the third through hole (35), and the ejector rod (37) is positioned at the top of the valve core (2); the yoke (28) is fixedly connected with the valve body (1);
the outer wall of the stop iron (29) is provided with a first conical surface (40) and a second conical surface (41) along the circumferential direction, the small ends of the first conical surface (40) and the small ends of the second conical surface (41) are connected through a cylindrical surface (42) arranged along the circumferential direction, and a magnetic breaker is sleeved outside the cylindrical surface (42).
2. A proportional solenoid valve as defined in claim 1, wherein: a limiting step (25) is arranged at one end, close to the valve core (2), of the valve seat (3), and the limiting step (25) is abutted against the end face of the valve body (1) to be matched;
one end of the valve seat (3) far away from the valve core (2) is provided with a mounting boss (26) along the circumferential direction, and the outer wall of the mounting boss (26) is connected with the inner wall of the first through hole (4);
The two oil path channels (15) are symmetrically arranged about the axis of the valve seat (3), and the two oil path channels (15) are both arranged on the mounting boss (26) and axially arranged along the valve seat (3).
3. A proportional solenoid valve as claimed in claim 1 or 2, wherein: a plurality of grooves (27) are formed in the peripheral direction of the part, attached to the side wall of the first through hole (4) in the valve body (1), of the side wall of the valve core (2).
4. A proportioning solenoid valve as set forth in claim 3 wherein: a first mounting groove (16) is formed in the side wall of the valve body (1) and located at one side, far away from the valve seat (3), of the oil inlet (5), and a first sealing ring (17) is arranged in the first mounting groove (16);
a second mounting groove (18) is formed in the side wall of the valve body (1) between the oil inlet (5) and the pressure regulating port (6) along the circumferential direction, and a second sealing ring (19) is arranged in the second mounting groove (18); a third mounting groove (20) is formed in the side wall of the valve body (1) between the pressure adjusting port (6) and the first oil return port (7) along the circumferential direction, and a third sealing ring (21) is arranged in the third mounting groove (20);
a fourth mounting groove (22) is formed in the side wall of the valve body (1) and positioned at one side of the first oil return port (7) close to the valve seat (3) along the circumferential direction, and a fourth sealing ring (23) is arranged in the fourth mounting groove (22);
The oil inlet (5), the pressure regulating port (6) and the first oil return port (7) are respectively provided with a filter screen (24), and are respectively and hermetically connected to the side wall of the oil inlet (5), the side wall of the pressure regulating port (6) and the side wall of the first oil return port (7).
5. A proportional solenoid valve as defined in claim 4, wherein: the cover plate (39) is arranged at the top of the yoke (28) and covers the third through hole (35);
the bottom of the baffle iron (29) is positioned at the outer edge of the second through hole (36) and is provided with a gasket (38) made of non-soft magnetic metal materials.
6. A proportional solenoid valve as defined in claim 5, wherein: a film is arranged between the stop iron (29) and the armature (30);
the cross section of the magnetic circuit breaker is any one of triangle, circle or rectangle, and surrounds the outer wall cylindrical surface (42) of the stop iron (29) in a spiral line mode for a circle.
7. A proportional solenoid valve comprising a yoke (28), a stopper (29), an armature (30), a connector (31), a coil (32) and a second elastic member (46); the method is characterized in that: the device also comprises a pressure regulating device;
the pressure regulating device comprises a valve body (1), a valve core (2) and a valve seat (3); a first through hole (4) is formed in the valve body (1) along the axial direction, the valve core (2) and the valve seat (3) are both arranged in the first through hole (4), and the valve body (1), the valve core (2) and the valve seat (3) are coaxially arranged;
A second oil return port (49), a first oil return port (7), an oil outlet (47) and an oil inlet (5) which are communicated with the first through hole (4) are sequentially formed in the side wall of the valve body (1), and the oil inlet (5) is positioned at one end close to the valve seat (3);
a third annular groove (48) is formed in the side wall of the valve core (2), a first pressure guiding hole (10) is formed in the side wall, located in the third annular groove (48), of the valve core (2), a pressure feedback hole (11) is formed in the end face, close to the valve seat (3), of the valve core (2), the first pressure guiding hole (10) is communicated with the pressure feedback hole (11) through a second pressure guiding hole (12), and the second pressure guiding hole (12) and the pressure feedback hole (11) are all arranged along the axial direction of the valve core (2);
a fourth annular groove (50) is formed in the outer edge of the end face of the valve core (2) far away from the valve seat (3) along the circumferential direction, the oil outlet (47) is opposite to the third annular groove (48), and the second oil return port (49) is opposite to the fourth annular groove (50);
a spherical piston (13) is arranged in the pressure feedback hole (11), and the outer diameter of the spherical piston (13) is matched with the inner diameter of the pressure feedback hole (11);
one end of the valve seat (3) is connected with the valve body (1), and the other end of the valve seat extends into the pressure feedback hole (11) and is contacted with the spherical piston (13); the side wall of the valve seat (3) positioned outside the pressure feedback hole (11) is sleeved with a first elastic component (14), one end of the first elastic component (14) is connected with the valve seat (3), and the other end is connected with the valve core (2); one end of the valve seat (3) fixedly connected with the valve body (1) is provided with an oil path channel (15) for communicating the first through hole (4) with the outside;
The yoke (28), the stop iron (29) and the armature (30) are sleeved in sequence from outside to inside, wherein the top of the yoke (28) is closed, a gap is reserved between the yoke (28) and the stop iron (29), a coil (32) is coiled outside the stop iron (29) and is positioned in the gap between the yoke (28) and the stop iron (29), and the coil (32) is connected with an external power supply through a connector (31); the stop iron (29) is in sliding fit with the armature (30); the yoke (28) is fixedly connected with the valve body (1);
the stop iron (29) is in a hollow column shape, and a blind hole (43) is formed in the inner surface of the top of the stop iron;
a first mounting hole (44) which is opposite to the blind hole (43) is formed in the upper end face of the armature (30), a second mounting hole (45) is formed in the lower end face of the armature, the first mounting hole (44) is communicated with the second mounting hole (45), and the inner diameter of the second mounting hole (45) is smaller than that of the first mounting hole (44); the height of the armature (30) is smaller than the inner height of the stop iron (29);
one end of the second elastic component (46) is connected with the bottom of the blind hole (43), and the other end of the second elastic component is connected with the bottom of the first mounting hole (44);
the valve core (2) is positioned below the armature (30), and the diameter of the valve core (2) is larger than the inner diameter of the second mounting hole (45); the outer diameter of the armature (30) is larger than the inner diameter of the first through hole (4);
the outer wall of the stop iron (29) is provided with a first conical surface (40) and a second conical surface (41) along the circumferential direction, the small ends of the first conical surface (40) and the small ends of the second conical surface (41) are connected through a cylindrical surface (42) arranged along the circumferential direction, and a magnetic breaker is sleeved outside the cylindrical surface (42).
8. A proportional solenoid valve as defined in claim 7, wherein: a limiting step (25) is arranged at one end, close to the valve core (2), of the valve seat (3), and the limiting step (25) is abutted against the end face of the valve body (1) to be matched;
one end of the valve seat (3) far away from the valve core (2) is provided with a mounting boss (26) along the circumferential direction, and the outer wall of the mounting boss (26) is connected with the inner wall of the first through hole (4);
two oil path channels (15) are symmetrically arranged about the axis of the valve seat (3), and the two oil path channels (15) are both arranged on the mounting boss (26) and axially arranged along the valve seat (3);
a plurality of grooves (27) are formed in the peripheral direction of the part, attached to the side wall of the first through hole (4) in the valve body (1), of the side wall of the valve core (2).
9. A proportional solenoid valve as defined in claim 8, wherein: the inner surface of the top end of the stop iron (29) is positioned at the outer edge of the blind hole (43) and is provided with a gasket (38) made of non-soft magnetic metal materials;
a film is arranged between the stop iron (29) and the armature (30);
the cross section of the magnetic circuit breaker is any one of triangle, circle or rectangle, and surrounds the cylindrical surface (42) of the outer wall of the stop iron (29) for a circle in a spiral line mode;
the yoke (28) is fixedly connected with the valve body (1) through a lower magnetic circuit plate (34), and the lower magnetic circuit plate (34) is arranged along the radial direction.
10. The utility model provides a pressure regulating device in proportion solenoid valve, includes valve body (1), case (2) and disk seat (3), first through-hole (4) have been seted up along the axial to inside valve body (1), case (2) and disk seat (3) are all installed in first through-hole (4), and valve body (1), case (2) and disk seat (3) coaxial setting: the method is characterized in that:
an oil inlet (5), a pressure regulating port (6) and a first oil return port (7) which are communicated with the first through hole (4) are sequentially formed in the side wall of the valve body (1), wherein the first oil return port (7) is positioned at one end close to the valve seat (3);
one end of the valve core (2) far away from the valve seat (3) is connected with an external driving part, and the valve core (2) is driven to reciprocate relative to the valve body (1); a first annular groove (8) and a second annular groove (9) are formed in the side wall of the valve core (2), a first pressure guiding hole (10) is formed in the side wall of the valve core (2) between the first annular groove (8) and the second annular groove (9), a pressure feedback hole (11) is formed in the end face, close to the valve seat (3), of the valve core (2), the first pressure guiding hole (10) is communicated with the pressure feedback hole (11) through a second pressure guiding hole (12), and the second pressure guiding hole (12) and the pressure feedback hole (11) are all arranged along the axial direction of the valve core (2);
a limiting step (25) is arranged at one end, close to the valve core (2), of the valve seat (3), and the limiting step (25) is abutted against the end face of the valve body (1) to be matched;
A plurality of grooves (27) are formed in the peripheral direction of the part, attached to the side wall of the valve core (2) and the side wall of the first through hole (4) in the valve body (1);
the oil inlet (5) is opposite to the first annular groove (8), the first oil return port (7) is opposite to the second annular groove (9), and the first pressure guiding hole (10) is opposite to the pressure regulating port (6); the side wall of the valve core (2) positioned at one side of the first pressure guiding hole (10) far away from the valve seat (3) reciprocates along with the valve core (2), and the moving range of the valve core is between the oil inlet (5) and the pressure regulating port (6) to the pressure regulating port (6);
a spherical piston (13) is arranged in the pressure feedback hole (11), and the outer diameter of the spherical piston (13) is matched with the inner diameter of the pressure feedback hole (11);
one end of the valve seat (3) is connected with the valve body (1), and the other end of the valve seat extends into the pressure feedback hole (11) and is contacted with the spherical piston (13); the side wall of the valve seat (3) positioned outside the pressure feedback hole (11) is sleeved with a first elastic component (14), one end of the first elastic component (14) is connected with the valve seat (3), and the other end is connected with the valve core (2); one end of the valve seat (3) fixedly connected with the valve body (1) is provided with an oil path channel (15) for communicating the first through hole (4) with the outside.
CN202111467545.XA 2021-03-30 2021-12-03 Proportional solenoid valve and pressure regulating device therein Pending CN116771950A (en)

Applications Claiming Priority (12)

Application Number Priority Date Filing Date Title
CN2021103418599 2021-03-30
CN2021206443333 2021-03-30
CN202110341859.9A CN112984154A (en) 2021-03-30 2021-03-30 Proportional pressure reducing electromagnetic valve with integrated stop iron and pole shoe and spherical piston structure
CN202110342573.2A CN113007388A (en) 2021-03-30 2021-03-30 Pressure regulating valve with spherical piston structure for proportional solenoid valve
CN2021206451043 2021-03-30
CN202120644841 2021-03-30
CN2021103425732 2021-03-30
CN202120645104 2021-03-30
CN2021103422927 2021-03-30
CN2021206448411 2021-03-30
CN202110342292.7A CN112984155A (en) 2021-03-30 2021-03-30 Inverse proportion pressure reducing electromagnetic valve with ball-shaped piston structure integrating stop iron and pole shoe
CN202120644333 2021-03-30

Publications (1)

Publication Number Publication Date
CN116771950A true CN116771950A (en) 2023-09-19

Family

ID=87986467

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111467545.XA Pending CN116771950A (en) 2021-03-30 2021-12-03 Proportional solenoid valve and pressure regulating device therein

Country Status (1)

Country Link
CN (1) CN116771950A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101896752A (en) * 2008-05-29 2010-11-24 爱信艾达株式会社 Solenoid valve device
CN104864118A (en) * 2015-05-21 2015-08-26 绵阳富临精工机械股份有限公司 Proportional control magnetic valve
CN110905880A (en) * 2018-06-08 2020-03-24 张玲花 Pressure compensation valve and valve core of cartridge valve hydraulic system
CN112412773A (en) * 2020-12-30 2021-02-26 赛克思液压科技股份有限公司 Power control valve for plunger pump

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101896752A (en) * 2008-05-29 2010-11-24 爱信艾达株式会社 Solenoid valve device
CN104864118A (en) * 2015-05-21 2015-08-26 绵阳富临精工机械股份有限公司 Proportional control magnetic valve
CN110905880A (en) * 2018-06-08 2020-03-24 张玲花 Pressure compensation valve and valve core of cartridge valve hydraulic system
CN112412773A (en) * 2020-12-30 2021-02-26 赛克思液压科技股份有限公司 Power control valve for plunger pump

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