High-speed switch electromagnetic valve beneficial to linear regulation and control

Abstract

The utility model discloses a high-speed switch electromagnetic valve facilitating linear regulation and control structurally. The high-speed switch electromagnetic valve comprises a magnetism isolating pipe, a valve body, a valve seat, moving iron, a valve element, a spring, an annular filter screen and an end filter screen. The magnetic isolation pipe and the valve body are in interference fit and guarantee sealing, an annular boss is machined in an axial inner hole of the valve body, three oil outlets evenly distributed at the interval of 120 degrees are formed in the circumferential direction of the valve body, and the end filter screen is tightly matched with the valve seat, so that brake fluid flows into an inner cavity of the valve body through filter screen holes and valve seat holes and flows out of the oil outlets. Two stages of conical surfaces with different angles are machined on the valve seat. Compared with the prior art, the structure is compact and ingenious, the spring is arranged far away from the oil outlets, interference of the spring on medium flowing is effectively reduced, and the influence of the wall attachment effect on axial and radial stress of the valve element is reduced through the methods that the variable-angle conical surface is machined on the valve seat, the non-sealing arc surface of the valve element is reduced, and the oil outlets are evenly arranged. And the possibility of linear regulation and control is improved structurally.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of electromagnetic valve, and relates to a high-speed switch electromagnetic valve, especially can be used for high-speed switch electromagnetic valve of automobile brake system. BACKGROUND

[0002] The precise regulation and control of the wheel cylinder pressure of the automobile has a decisive role in the reliable and stable control of the braking force of the vehicle, the realization of the goal of stable vehicle body and safe vehicle driving and the like. Linear pressure increase is to control the pressure increase rate by controlling the opening of the valve core and then changing the conical orifice area. Under the PWM control of high frequency, the high-speed switch electromagnetic valve of some structure can realize the linear regulation and control function, so that it can be used as an approximate proportional valve under certain conditions, which plays a very important role in the precise regulation and control of the wheel cylinder pressure. The current structure of the electromagnetic valve has great difficulty in maintaining the consistency of linear pressure increase, and the linear regulation and control interval is relatively narrow, which to some extent affects the development of the precise regulation and control of the wheel cylinder pressure, and it is necessary to further improve the structure design. SUMMARY

[0003] The utility model discloses a kind of high-speed switch electromagnetic valves that help to realize linear regulation and control function, to solve the problem raised in above background technique.

[0004] To achieve the above object, the utility model provides the following technical scheme: including moving iron, the moving iron is installed in the magnetic isolation pipe by gap cooperation, the magnetic isolation pipe is sleeved in the valve body by interference fit, the valve body is installed with ring filter screen in circumferential direction, the valve body axial through hole bottom is installed with valve seat by interference fit, the valve body bottom is installed with end filter screen, annular boss is processed in the valve body axial through hole, spring is installed and fixed between the valve core and the valve body annular boss, brake fluid is formed by the close cooperation of the magnetic isolation pipe, the valve seat, the valve body, the ring filter screen and the end filter screen to form stable oil circuit that passes through end filter screen hole, passes through valve seat into valve body and then flows out after passing through ring filter screen hole.

[0005] Preferably, the valve body is processed with three oil outlets arranged uniformly at an interval of 120 degrees in the circumferential direction, annular boss is processed in the valve body axial through hole, and the boss is away from the oil outlet position, to reduce the influence of the spring on the flow field near the oil inlet and the oil outlet.

[0006] Preferably, the spring is arranged between the valve core and the boss of the valve body, the valve core axis, the spring axis, the valve seat center hole axis and the valve body axial through hole center line are collinear.

[0007] Preferably, two-stage conical surfaces are processed above the valve seat center hole, the first-stage conical surface is used for cooperating with the end arc surface of the valve core to seal, and the second-stage conical surface has a larger angle and is used for weakening the influence of the attachment wall effect on the flow field.

[0008] Preferably, the vertical projection area of the lower end arc surface of the valve core is slightly larger than the maximum diameter of the first-stage conical surface and smaller than the hemispherical surface with the same diameter, preventing the large ball head arc surface from causing a large wall effect on the flow field.

[0009] Preferably, the lower end arc surface of the valve core cooperates with the first-stage conical surface of the valve seat to seal, so as to ensure that the valve core can control the on-off of the oil passage.

[0010] Preferably, under the action of the spring, the upper end plane of the valve core is attached to the lower end surface of the moving iron, and when the electromagnetic valve is powered on, the magnetized moving iron is attracted to the valve body, compresses the spring and pushes the valve core to move, thereby controlling the on-off of the oil passage.

[0011] Compared with the prior art, the utility model has the beneficial effects that:

[0012] The spring is arranged away from the motion flow field area, the spring interference on the flow field is reduced, the flow field stability is effectively improved, the stress condition of the valve core is improved, and the brake fluid flow control precision is improved.

[0013] The utility model discloses further through the valve seat processing has the angle conical surface of change, reduces the non-sealing arc surface of valve core, the oil outlet of uniform arrangement 120 degrees, reduces the wall effect of brake fluid of valve seat, valve core, reduces the complexity of fluid flow state, improves the state of axial and radial stress of valve core, improves the possibility of linear control from structure. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a kind of high-speed switch electromagnetic valve overall structure schematic diagram that the utility model helps to realize linear control function. In the drawing: 1, moving iron;2, magnetic isolation tube;3, valve seat;3.1, valve seat first-stage conical surface 3.2, valve seat second-stage conical surface;4, spring;5, valve core;6, ring filter screen;7, valve body;7.1, valve body hole inner annular boss;8, end filter screen. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0016] Please refer to Figure 1The utility model provides a new structure scheme: including moving iron 1, moving iron 1 is installed in the magnetic isolation pipe 2 through the clearance fit, the magnetic isolation pipe 2 is sleeved in valve body 7 through the interference fit, and the valve body 7 is provided with ring filter screen 6 in the outer circumferential direction, and the bottom of valve body 7 axial through -hole is provided with valve seat 3 through the interference fit, and the bottom of valve body 7 is provided with end filter screen 8, and the inside processing of valve body 7 axial through -hole has annular boss 7.1, and spring 4 is installed fixed between valve core 5 and valve body 7 annular boss, and the close cooperation of magnetic isolation pipe 2, valve seat 3, valve body 7, ring filter screen 6 and end filter screen 8 makes the brake fluid form the stable oil circuit that passes through end filter screen hole, passes through valve seat and then flows out after entering valve body.

[0017] The utility model discloses a new structure scheme: including moving iron 1, moving iron 1 is installed in the magnetic isolation pipe 2 through the clearance fit, the magnetic isolation pipe 2 is sleeved in valve body 7 through the interference fit, and the valve body 7 is provided with ring filter screen 6 in the outer circumferential direction, and the bottom of valve body 7 axial through -hole is provided with valve seat 3 through the interference fit, and the bottom of valve body 7 is provided with end filter screen 8, and the inside processing of valve body 7 axial through -hole has annular boss 7.1, and spring 4 is installed fixed between valve core 5 and valve body 7 annular boss, and the close cooperation of magnetic isolation pipe 2, valve seat 3, valve body 7, ring filter screen 6 and end filter screen 8 makes the brake fluid form the stable oil circuit that passes through end filter screen hole, passes through valve seat and then flows out after entering valve body.

[0018] It should be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0019] Although embodiments of the present utility model have been shown and described, it would be appreciated by those skilled in the art that changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A high speed on-off solenoid valve with linear control, comprising a moving iron (1), characterized in that: The moving iron (1) is installed in the magnetic isolation tube (2) by gap fit, the magnetic isolation tube (2) is sleeved on the valve body (7) by interference fit, the valve body (7) is provided with a ring filter screen (6) in the circumferential direction, the valve body (7) is provided with a valve seat (3) at the bottom of the axial through hole by interference fit, the valve body (7) is provided with an end filter screen (8) at the bottom, an annular boss (7.1) is processed in the axial through hole of the valve body (7), the spring (4) is fixed between the valve core (5) and the annular boss of the valve body (7), the brake fluid forms a stable oil path through the end filter screen hole, the valve seat and the ring filter screen by the close fit of the magnetic isolation tube (2), the valve seat (3), the valve body (7), the ring filter screen (6) and the end filter screen (8), the valve body (7) is processed with three oil outlets arranged uniformly at an interval of 120 degrees in the circumferential direction, two-stage conical surfaces are processed above the center hole of the valve seat (3), the first-stage conical surface (3.1) is used for sealing cooperation with the end arc surface of the valve core (5), the second-stage conical surface (3.2) has a larger angle and is used for weakening the influence of the wall attachment effect on the flow field.

2. A high speed on-off solenoid valve with linear control according to claim 1, characterized in that: The annular boss (7.1) is processed in the axial through hole of the valve body (7) and is away from the oil outlet position, thereby reducing the influence of the spring on the flow field near the oil inlet and the oil outlet.

3. The high speed on-off solenoid valve with linear control according to claim 1, wherein: The spring (4) is arranged between the boss of the valve core (5) and the valve body (7), the valve core axis, the spring axis, the valve seat center hole axis and the valve body axial through hole center line are collinear.

4. A high speed on-off solenoid valve with linear control according to claim 2, wherein: The vertical projection area of the lower end arc surface of the valve core (5) is slightly larger than the maximum diameter of the first-stage conical surface (3.1) and smaller than the half sphere circle with the same diameter, so as to prevent the large ball head arc surface from causing large wall attachment effect on the flow field.

5. The high speed on-off solenoid valve with linear control according to claim 1, wherein: The lower end arc surface of the valve core (5) is sealed with the first-stage conical surface (3.1) of the valve seat (3), so as to ensure that the valve core can control the on-off of the oil path.

6. A high speed on-off solenoid valve with linear control according to claim 1, wherein: Under the action of the spring (4), the upper end plane of the valve core (5) is attached to the lower end surface of the moving iron (1), when the electromagnetic valve is powered on, the magnetized moving iron (1) is attracted to the valve body (7), the spring (4) is compressed and the valve core (5) is pushed to move, thereby controlling the on-off of the oil path.

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