CN116518087A - Pressure reducing valve - Google Patents

Pressure reducing valve Download PDF

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Publication number
CN116518087A
CN116518087A CN202210632278.5A CN202210632278A CN116518087A CN 116518087 A CN116518087 A CN 116518087A CN 202210632278 A CN202210632278 A CN 202210632278A CN 116518087 A CN116518087 A CN 116518087A
Authority
CN
China
Prior art keywords
valve
oil outlet
seat
pressure reducing
cavity
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
CN202210632278.5A
Other languages
Chinese (zh)
Inventor
许辉
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.)
Shanghai Likeng Technology Co ltd
Original Assignee
Shanghai Likeng 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
Application filed by Shanghai Likeng Technology Co ltd filed Critical Shanghai Likeng Technology Co ltd
Priority to CN202210632278.5A priority Critical patent/CN116518087A/en
Publication of CN116518087A publication Critical patent/CN116518087A/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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
    • B60T15/02—Application and release valves
    • B60T15/025—Electrically controlled valves
    • B60T15/028—Electrically controlled valves in hydraulic systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/36—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition including a pilot valve responding to an electromagnetic force
    • B60T8/3615—Electromagnetic valves specially adapted for anti-lock brake and traction control systems
    • B60T8/363—Electromagnetic valves specially adapted for anti-lock brake and traction control systems in hydraulic systems
    • 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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/14—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with ball-shaped valve member
    • 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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/42—Valve seats
    • 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
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0245—Construction of housing; Use of materials therefor of lift valves with ball-shaped valve members
    • 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
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/029—Electromagnetically actuated 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
    • F16K31/0644—One-way valve
    • F16K31/0655—Lift valves
    • F16K31/0665—Lift valves with valve member being at least partially ball-shaped
    • 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
    • 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
    • F16K47/00—Means in valves for absorbing fluid energy
    • F16K47/08—Means in valves for absorbing fluid energy for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Transportation (AREA)
  • Fluid Mechanics (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

The pressure reducing valve comprises a valve block, wherein a valve cavity, an oil inlet channel and an oil outlet channel which are communicated with the valve cavity are arranged in the valve block, a supporting seat, a valve seat and a throttle are arranged in the valve cavity, the valve seat is accommodated in the supporting seat and is positioned at the lower end of the supporting seat, the supporting seat is penetrated with an oil inlet which is communicated with the oil inlet channel and the inside of the supporting seat, the valve seat is penetrated with an oil outlet which is communicated with the oil outlet channel and the inside of the supporting seat, the throttle is arranged below the valve seat, and the throttle is penetrated with a throttle hole along the axial direction; the pressure reducing valve also comprises a moving iron arranged above the valve seat, and the moving iron can move up and down to open the oil outlet or seal the oil outlet; sealing the oil outlet when the moving iron moves downwards, so that the oil inlet channel is not communicated with the oil outlet channel; when the moving iron moves upwards, the oil outlet is opened, so that the oil inlet channel is communicated with the oil outlet channel through the oil inlet, the oil outlet and the throttling hole in sequence.

Description

Pressure reducing valve
Technical Field
The invention relates to the technical field of valves, in particular to a pressure reducing valve.
Background
The hydraulic brake system of the passenger car is fully changed to the drive-by-wire direction, and the electromechanical hydraulic system is taken as a main stream type. Currently, a brake-by-wire system mainly comprises a master cylinder, an electric cylinder, a wheel cylinder, an electromagnetic valve, a sensor and an ECU; when a driver presses a brake pedal, an ECU of the linear control brake system detects a change value of a pedal displacement sensor connected with the pedal, and then determines how much brake pressure needs to be provided by an electric cylinder and requires a motor to work according to the change value, so that brake fluid is compressed, hydraulic pressure is built up and is conducted to wheel cylinders, and the requirement of providing braking force for a vehicle is met.
Pressure relief valves are widely used in hydraulic control systems, and in hydraulic brake systems for vehicles, pressure relief valves are required, which are mainly pressure relief, reducing the inlet pressure to a certain desired outlet pressure. However, the existing pressure reducing valve is complex in overall structure, and the orifice is generally arranged in the supporting seat, so that the difficulty of the process of parts is high, the cost is high, and the application of the pressure reducing valve in the industrial field is limited, so that the existing pressure reducing valve is necessary to be improved.
Disclosure of Invention
Therefore, the invention aims to provide the pressure reducing valve which has a simple integral structure and low processing difficulty and cost of parts.
The invention provides a pressure reducing valve, which comprises a valve block, wherein a valve cavity, an oil inlet channel and an oil outlet channel which are communicated with the valve cavity are arranged in the valve block, a supporting seat, a valve seat and a throttle are arranged in the valve cavity, the valve seat is accommodated in the supporting seat and is positioned at the lower end of the supporting seat, the supporting seat is penetrated with an oil inlet which is communicated with the oil inlet channel and the inside of the supporting seat, the valve seat is penetrated with an oil outlet which is communicated with the oil outlet channel and the inside of the supporting seat, the throttle is arranged below the valve seat, and the throttle is penetrated with a throttle hole along the axial direction; the pressure reducing valve also comprises a moving iron arranged above the valve seat, and the moving iron can move up and down to open the oil outlet or seal the oil outlet; sealing the oil outlet when the moving iron moves downwards, so that the oil inlet channel is not communicated with the oil outlet channel; when the moving iron moves upwards, the oil outlet is opened, so that the oil inlet channel is communicated with the oil outlet channel through the oil inlet, the oil outlet and the throttling hole in sequence.
In an embodiment, the supporting seat is hollow and annular, is in a funnel shape with a wide upper part and a narrow lower part, the oil inlet penetrates through the side wall of the supporting seat, a first cavity is formed in the supporting seat, and the lower end of the moving iron stretches into the first cavity.
In an embodiment, the inner diameter of the upper end of the supporting seat is larger than the inner diameter of the lower end of the supporting seat, a step part is formed between the upper end of the supporting seat and the lower end of the supporting seat, the oil inlet penetrates through the side wall of the upper end of the supporting seat, and the oil inlet is located above the step part.
In one embodiment, a sealing ring is arranged outside the supporting seat in the valve cavity, is positioned below the step part and is clamped between the inner wall of the valve cavity and the outer wall of the supporting seat.
In one embodiment, the valve seat is in an inverted cylindrical shape, the oil outlet penetrates through the center of the top plate of the valve seat, a second cavity is formed in the valve seat, and the restrictor extends into the second cavity.
In one embodiment, the throttle comprises an insertion part and a head part, the diameter of the head part is larger than that of the insertion part, the insertion part is inserted into the second cavity from the bottom end of the valve seat and is fixedly connected with the valve seat, the head part is positioned outside the valve seat, and the throttle hole is axially arranged in the insertion part or the head part in a penetrating manner; when the movable iron moves upwards to open the oil outlet, the oil inlet channel is communicated with the oil outlet channel through the oil inlet, the first cavity, the oil outlet, the second cavity and the throttle hole in sequence.
In one embodiment, the oil outlet and the orifice are aligned up and down, with the oil outlet passage being located directly below the orifice.
In one embodiment, the bottom of the support seat is provided with a flange surface in an inward protruding manner, the bottom of the valve seat is supported on the flange surface, and the flange surface is positioned between the bottom of the valve seat and the head.
In one embodiment, the outer wall of the valve seat is in interference fit with the inner wall of the lower end of the support seat, and the outer wall of the insertion portion is in interference fit with the inner wall of the valve seat.
In one embodiment, the restrictor is an injection molded piece made of plastic.
In an embodiment, the pressure reducing valve is an electromagnetic valve, the pressure reducing valve further comprises a coil and a fixed iron, the fixed iron is arranged above the movable iron, the fixed iron is fixed, an elastic piece is arranged between the fixed iron and the movable iron, the movable iron is driven to move upwards when the coil is electrified and compress the elastic piece, and the elastic piece pushes the movable iron to move downwards through elastic force when the coil is powered off.
In an embodiment, the pressure reducing valve further comprises a magnetism isolating pipe, the inside of the magnetism isolating pipe is a cavity, the fixed iron and the movable iron are contained in the magnetism isolating pipe, and the upper end of the supporting seat is fixedly connected with the lower end of the magnetism isolating pipe.
In one embodiment, the outer wall of the lower end of the magnetism isolating pipe and the inner wall of the upper end of the supporting seat are fixed through welding.
In one embodiment, the lower end of the moving iron is in a cone shape with the diameter reduced from top to bottom, and the bottom of the moving iron is fixedly connected with a steel ball for sealing the oil outlet.
According to the pressure reducing valve provided by the embodiment of the invention, the valve cavity, the oil inlet channel and the oil outlet channel which are communicated with the valve cavity are arranged in the valve block, the supporting seat, the valve seat and the throttle are arranged in the valve cavity, the supporting seat is penetrated with the oil inlet which is communicated with the oil inlet channel and the inside of the supporting seat, the valve seat is penetrated with the oil outlet which is communicated with the oil outlet channel and the inside of the supporting seat, the throttle is arranged below the valve seat, and the throttle is penetrated with the throttle hole along the axial direction. The pressure reducing valve can enable the oil inlet channel to be communicated with the oil outlet channel or be blocked from being communicated by the up-and-down movement of the moving iron. The overall structure of the pressure reducing valve is simple, unlike the conventional design that the throttle hole is arranged in the supporting seat, the supporting seat does not contain the throttle hole, the throttle hole is arranged on the throttle, the throttle can be an injection molding piece, the process difficulty is low, and the cost is low.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a pressure reducing valve in an energized state according to an embodiment of the present invention.
Fig. 2 is a schematic view showing a partial structure of the pressure reducing valve in fig. 1.
Fig. 3 is a schematic structural diagram of a pressure reducing valve in a power-off state according to an embodiment of the invention.
Detailed Description
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art without making any inventive effort, are intended to be within the scope of the present invention.
The terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "horizontal," "vertical," and the like refer to an orientation or positional relationship based on that shown in the drawings, or that is conventionally put in place when the inventive product is used, merely for convenience of description and to simplify the description, and do not denote or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the invention.
Moreover, the terms "first," "second," "third," and the like, are used merely to distinguish between similar elements and do not indicate or imply a relative importance or a particular order.
Furthermore, the terms "comprise," "include," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that elements are listed and may include other elements not expressly listed.
Embodiments of the present invention provide a pressure reducing valve for reducing an inlet pressure to a desired outlet pressure, and in particular, the pressure reducing valve may be applied to a hydraulic brake system of a passenger car, for example, a brake anti-lock system (antilock brake system, ABS), a body electronic stability control system (electronic stability controller, ESC), or a brake-by-wire system, but not limited thereto, and may be applied to other hydraulic control systems in addition thereto.
Referring to fig. 1 and 2, the pressure reducing valve comprises a valve block 10, wherein a valve cavity 11, an oil inlet channel 13 and an oil outlet channel 14 are arranged in the valve block 10 and are communicated with the valve cavity 11. The valve chamber 11 is provided with a support seat 17, a valve seat 18, and a throttle 41. The valve seat 18 is accommodated in the supporting seat 17 and is positioned at the lower end of the supporting seat 17. The supporting seat 17 is provided with an oil inlet 22 which is communicated with the oil inlet channel 13 and the inside of the supporting seat 17. The valve seat 18 is provided with an oil outlet 23 which is communicated with the oil outlet channel 14 and the inside of the supporting seat 17. The restrictor 41 is provided below the valve seat 18, and the restrictor 41 is provided with an orifice 42 penetrating in the axial direction.
Specifically, the pressure reducing valve is a solenoid valve, and the pressure reducing valve further includes a moving iron 19 disposed above the valve seat 18, the moving iron 19 being movable up and down to open the oil outlet 23 or seal the oil outlet 23. Fig. 1 shows an energized state of the pressure reducing valve, and referring to fig. 1, in the energized state, the moving iron 19 is driven to move upward, and when the moving iron 19 moves upward, the oil outlet 23 is opened, so that the oil inlet channel 13 is communicated with the oil outlet channel 14 through the oil inlet 22, the oil outlet 23 and the orifice 42 in sequence.
Fig. 3 shows the pressure reducing valve in a power-off state, and referring to fig. 3, in the power-off state, the moving iron 19 is driven to move downward, and the oil outlet 23 is sealed when the moving iron 19 moves downward, so that the oil inlet channel 13 is not communicated with the oil outlet channel 14.
The supporting seat 17 is hollow and annular, and is funnel-shaped with a wider upper part and a narrower lower part. The oil inlet 22 is provided through a side wall of the support base 17. The first cavity 51 is formed in the support seat 17, and the lower end of the movable iron 19 extends into the first cavity 51, so that the movable iron 19 can be utilized to seal the oil outlet 23. Specifically, the inner diameter of the upper end of the support seat 17 is larger than the inner diameter of the lower end of the support seat 17, and a stepped portion 25 is formed between the upper end of the support seat 17 and the lower end of the support seat 17. The oil inlet 22 is provided through the side wall of the upper end of the support base 17, and the oil inlet 22 is located above the step portion 25. The valve cavity 11 is provided with a sealing ring 28 outside the supporting seat 17, and the sealing ring 28 is positioned below the step part 25 and is clamped between the inner wall of the valve cavity 11 and the outer wall of the supporting seat 17. By providing the seal ring 28, the oil in the oil inlet passage 13 and the oil outlet passage 14 cannot leak through the outside of the support seat 17, and can only communicate through the oil inlet 22, the first cavity 51 inside the support seat 17, the oil outlet 23, and the orifice 42.
Specifically, the valve seat 18 is of an inverted cylindrical shape, the valve seat 18 includes an annular side wall and a top plate at the top end of the side wall, and the oil outlet 23 is provided penetrating the center of the top plate of the valve seat 18. The interior of the valve seat 18 defines a second cavity 52, and the restrictor 41 extends into the second cavity 52.
The throttle 41 includes an insertion portion 43 and a head portion 44, the diameter of the head portion 44 is larger than that of the insertion portion 43, the insertion portion 43 is inserted into the second cavity 52 from the bottom end of the valve seat 18 and fixedly connected with the valve seat 18, the head portion 44 is located outside the valve seat 18, the throttle hole 42 is axially disposed in the insertion portion 43 or the head portion 44, and in this embodiment, the throttle hole 42 is axially disposed in the head portion 44. When the moving iron 19 moves upwards to open the oil outlet 23, the oil inlet channel 13 is communicated with the oil outlet channel 14 through the oil inlet 22, the first cavity 51, the oil outlet 23, the second cavity 52 and the throttle hole 42 in sequence. Specifically, oil outlet 23 and orifice 42 are aligned up and down. The oil intake passage 13 is disposed in the horizontal direction, the oil outlet passage 14 is disposed in the vertical direction, and the oil outlet passage 14 is located directly below the orifice 42.
The valve seat 18 is fixedly connected with the lower end of the supporting seat 17, specifically, the valve seat 18 and the lower end of the supporting seat 17 are in interference press fit, namely, the outer wall of the valve seat 18 and the inner wall of the lower end of the supporting seat 17 are in interference fit. The throttle 41 and the valve seat 18 are fixedly connected, specifically, the throttle 41 and the valve seat 18 are press-fitted with interference, i.e., interference fit between the outer wall of the insertion portion 43 of the throttle 41 and the inner wall of the valve seat 18.
In this embodiment, the orifice 42 has an aperture of between 0.3mm and 0.6mm and a length of between 0.3mm and 0.4 mm. If the aperture of the orifice 42 is too large, the throttling effect may be affected, and if the length of the orifice 42 is too large, the flow rate may be too small.
The bottom of the support seat 17 is provided with a flange surface 31 protruding inward, the bottom of the valve seat 18 is supported on the flange surface 31, and the flange surface 31 is located between the bottom of the valve seat 18 and the head 44 of the throttle 41 to prevent the valve seat 18 from being displaced relative to the support seat 17 due to long-term hydraulic pressure.
Further, a ring filter screen 32 is arranged in the valve cavity 11, and the ring filter screen 32 is arranged between the oil inlet channel 13 and the oil inlet 22. By providing a filter screen in the valve chamber 11 at the position of the oil inlet 22, impurities in the oil can be filtered, and prevented from entering the valve chamber 11.
Specifically, the pressure reducing valve is an electromagnetic valve, the pressure reducing valve further comprises a coil 37 and a fixed iron 38, the fixed iron 38 is arranged above the movable iron 19, the fixed iron 38 is fixed, an elastic piece 24 is arranged between the fixed iron 38 and the movable iron 19, one end of the elastic piece 24 abuts against the fixed iron 38, and the other end of the elastic piece 24 abuts against the movable iron 19. Specifically, the elastic member 24 may be a spring, but is not limited thereto. In this embodiment, the moving iron 19 is provided with a groove (not shown) at an end facing the fixed iron 38, and the spring is accommodated in the groove. When the coil 37 is powered on, the moving iron 19 is driven to move upwards and compress the elastic piece 24, and when the coil 37 is powered off, the elastic piece 24 pushes the moving iron 19 to move downwards through elastic force.
Further, the pressure reducing valve further comprises a magnetism isolating pipe 39, the upper end of the magnetism isolating pipe 39 can be sealed, the lower end of the magnetism isolating pipe 39 is provided with an opening, the inside of the magnetism isolating pipe 39 is provided with a cavity, and the fixed iron 38 and the movable iron 19 are accommodated in the magnetism isolating pipe 39 through the opening at the lower end of the magnetism isolating pipe 39. The fixed iron 38 is fixed in the magnetism isolating pipe 39, and the moving iron 19 can move up and down in the magnetism isolating pipe 39. The coil 37 is disposed outside the magnetism insulator tube 39. The fixed iron 38 is fixedly connected with the upper end of the magnetism isolating pipe 39, specifically, the outer wall of the fixed iron 38 and the inner wall of the upper end of the magnetism isolating pipe 39 are fixed by laser welding. The upper end of the supporting seat 17 is fixedly connected with the lower end of the magnetism isolating pipe 39, specifically, the outer wall of the lower end of the magnetism isolating pipe 39 and the inner wall of the upper end of the supporting seat 17 are fixed through laser welding.
Further, the lower end of the moving iron 19 is in a cone shape with the diameter reduced from top to bottom, the bottom of the moving iron 19 is fixedly connected with a steel ball 46 for sealing the oil outlet 23, and the oil outlet 23 is sealed through the steel ball 46, so that the effect is better.
When the coil 37 is electrified, the fixed iron 38 and the movable iron 19 are magnetized to generate suction force, and because the fixed iron 38 and the magnetism isolating pipe 39 are fixed by welding and cannot move, the movable iron 19 moves upwards towards the fixed iron 38 due to the attraction of electromagnetic force and overcomes the spring force to compress the spring, and finally the movable iron 19 drives the steel ball 46 to move upwards to be separated from the valve seat 18, the oil outlet 23 is opened, as shown in fig. 1, at the moment, the oil inlet channel 13 is communicated with the oil outlet channel 14 through the oil inlet 22, the first cavity 51, the oil outlet 23, the second cavity 52 and the orifice 42 in sequence, and brake fluid flows downwards to realize a decompression function.
When the coil 37 is powered off, the spring pushes the moving iron 19 downwards by using elastic force, and finally the moving iron 19 drives the steel ball 46 to move downwards to be tightly attached to the top plate of the valve seat 18 and seal the oil outlet 23, as shown in fig. 3, at the moment, the oil inlet channel 13 and the oil outlet channel 14 are blocked and are not communicated.
In this embodiment, the valve block 10 may be made of aluminum, the moving iron 19 and the fixed iron 38 may be made of low carbon steel, and the support seat 17, the valve seat 18, and the magnetism insulator 39 may be made of free-cutting stainless steel. The restrictor 41 may be an injection molded piece made of plastic.
The throttle hole 42 is arranged in the throttle 41, the throttle 41 is an injection molding piece, the throttle hole 42 of the throttle 41 has low process difficulty and low cost; meanwhile, the supporting seat 17 is free of orifice, so that the shape is simple, the process difficulty is reduced, and the cost is also reduced.
According to the pressure reducing valve provided by the embodiment of the invention, the valve cavity 11, the oil inlet channel 13 and the oil outlet channel 14 which are communicated with the valve cavity 11 are arranged in the valve block 10, the supporting seat 17, the valve seat 18 and the throttle 41 are arranged in the valve cavity 11, the supporting seat 17 is penetrated and provided with the oil inlet 22 which is communicated with the oil inlet channel 13 and the inside of the supporting seat 17, the valve seat 18 is penetrated and provided with the oil outlet 23 which is communicated with the oil outlet channel 14 and the inside of the supporting seat 17, the throttle 41 is arranged below the valve seat 18, and the throttle 41 is penetrated and provided with the throttle hole 42 along the axial direction. The pressure reducing valve can communicate or be blocked from communicating the oil inlet passage 13 with the oil outlet passage 14 by the up-and-down movement of the moving iron 19. The overall structure of the pressure reducing valve is simple, unlike the conventional design that the throttle hole is arranged in the supporting seat, the supporting seat does not contain the throttle hole, the throttle hole is arranged on the throttle, the throttle can be an injection molding piece, the process difficulty is low, and the cost is low.
In the present embodiment, the pressure reducing valve is a solenoid valve, and the throttle 41 may not be installed first when the stroke is set, so that the stroke setting of the solenoid valve is not obstructed.
The present invention is not limited to the above embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Accordingly, the scope of the invention should be assessed as that of the appended claims.

Claims (14)

1. The pressure reducing valve comprises a valve block, wherein a valve cavity, an oil inlet channel and an oil outlet channel are arranged in the valve block, and the oil inlet channel and the oil outlet channel are communicated with the valve cavity; the pressure reducing valve further comprises a moving iron arranged above the valve seat, and the moving iron can move up and down to open the oil outlet or seal the oil outlet; when the moving iron moves downwards, the oil outlet is sealed, so that the oil inlet channel is not communicated with the oil outlet channel; and when the moving iron moves upwards, the oil outlet is opened, so that the oil inlet channel is communicated with the oil outlet channel through the oil inlet, the oil outlet and the throttling hole in sequence.
2. The pressure reducing valve according to claim 1, wherein the supporting seat is hollow and annular, is in a funnel shape with a wide upper part and a narrow lower part, the oil inlet penetrates through the side wall of the supporting seat, a first cavity is formed in the supporting seat, and the lower end of the moving iron extends into the first cavity.
3. The pressure reducing valve according to claim 2, wherein an inner diameter of an upper end of the support seat is larger than an inner diameter of a lower end of the support seat, a stepped portion is formed between the upper end of the support seat and the lower end of the support seat, the oil inlet is provided through a side wall of the upper end of the support seat, and the oil inlet is located above the stepped portion.
4. A pressure reducing valve according to claim 3, wherein a sealing ring is arranged outside the supporting seat in the valve cavity, and the sealing ring is positioned below the step part and is clamped between the inner wall of the valve cavity and the outer wall of the supporting seat.
5. The pressure reducing valve according to claim 2, wherein the valve seat is in an inverted cylindrical shape, the oil outlet is provided through a center position of a top plate of the valve seat, a second cavity is formed inside the valve seat, and the restrictor extends into the second cavity.
6. The pressure reducing valve according to claim 5, wherein the restrictor includes an insertion portion and a head portion, the diameter of the head portion being larger than the diameter of the insertion portion, the insertion portion being inserted into the second cavity from a bottom end of the valve seat and fixedly connected to the valve seat, the head portion being located outside the valve seat, the orifice being disposed in the insertion portion or the head portion in an axial direction; when the moving iron moves upwards to open the oil outlet, the oil inlet channel is communicated with the oil outlet channel sequentially through the oil inlet, the first cavity, the oil outlet, the second cavity and the orifice.
7. The pressure relief valve as recited in claim 6 wherein said oil outlet is aligned above and below said orifice and said oil outlet passage is located directly below said orifice.
8. A pressure relief valve as claimed in claim 6, wherein the base of the support seat is provided with a flange surface projecting inwardly, the base of the valve seat being supported on the flange surface, the flange surface being located between the base of the valve seat and the head.
9. The pressure relief valve of claim 6, wherein an interference fit is provided between an outer wall of the valve seat and an inner wall of the lower end of the support seat, and wherein an interference fit is provided between an outer wall of the insert portion and an inner wall of the valve seat.
10. The pressure relief valve of claim 6, wherein the restrictor is an injection molded piece of plastic.
11. The pressure reducing valve according to any one of claims 1 to 10, wherein the pressure reducing valve is a solenoid valve, the pressure reducing valve further comprises a coil and a fixed iron, the fixed iron is arranged above the moving iron, the fixed iron is fixed, an elastic member is arranged between the fixed iron and the moving iron, the coil is powered on to drive the moving iron to move upwards and compress the elastic member, and the elastic member is powered off to push the moving iron to move downwards by elastic force.
12. The pressure reducing valve of claim 11, further comprising a magnetism isolating tube, wherein the magnetism isolating tube is hollow, the fixed iron and the moving iron are accommodated in the magnetism isolating tube, and the upper end of the supporting seat is fixedly connected with the lower end of the magnetism isolating tube.
13. The pressure reducing valve of claim 12, wherein the outer wall of the lower end of the magnetic isolation tube and the inner wall of the upper end of the support seat are fixed by welding.
14. The pressure reducing valve according to claim 11, wherein the lower end of the moving iron is tapered from top to bottom, and a steel ball for sealing the oil outlet is fixedly connected to the bottom of the moving iron.
CN202210632278.5A 2022-06-07 2022-06-07 Pressure reducing valve Pending CN116518087A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210632278.5A CN116518087A (en) 2022-06-07 2022-06-07 Pressure reducing valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210632278.5A CN116518087A (en) 2022-06-07 2022-06-07 Pressure reducing valve

Publications (1)

Publication Number Publication Date
CN116518087A true CN116518087A (en) 2023-08-01

Family

ID=87396410

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210632278.5A Pending CN116518087A (en) 2022-06-07 2022-06-07 Pressure reducing valve

Country Status (1)

Country Link
CN (1) CN116518087A (en)

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