Large-flow electromagnetic valve for automobile braking system
Through combined design and laser welding technology, the response time and overflow area of the solenoid valve are improved, and the problems of slow response time and high coil cost of existing solenoid valves under large flow conditions are solved, meeting the needs of automobile braking systems .
Patent Information
- Application Number
- CN202420830614.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-22
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-04-22
AI Technical Summary
In the case of large flow, the response time of existing solenoid valves is slow, the coil design cost is high, and it is difficult to meet the needs of automobile braking systems.
Using a combination design of static iron, valve sleeve, first-level valve core return spring, first-level valve core components, base, second-level valve core, sheath and second-level valve core return spring, the static iron and valve are fixed by laser welding. The sleeve increases the overflow area and avoids the flow blocking through the flow channel around the secondary valve core, thereby improving the response time.
It achieves the increase in the response time and increase in the overflow area of the solenoid valve, which meets the demand for large-flow solenoid valves of the automobile brake system, has a novel structure and reliable function.
Smart Images
Figure CN222209003U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of automobile brake system components, in particular to a large flow electromagnetic valve used in automobile brake systems. Background Art
[0002] Solenoid valves are actuators used for on / off and switching of hydraulic control systems. They have the remarkable characteristics of small size and fast response speed. They are mainly used to adjust the direction, flow rate, speed, etc. of the liquid supply in the system.
[0003] At present, when the existing solenoid valve provides a large flow rate, the pressure difference between the inlet and outlet liquids is large, the opening current must be large, the coil design cost is high, and the response time will also be affected. Therefore, it is necessary to improve the response time of the solenoid valve and increase the flow area at the same time to meet the requirements of the automobile braking system. Utility Model Content
[0004] The utility model provides a large flow electromagnetic valve for automobile braking system, aiming to improve the response time of the electromagnetic valve and increase the flow area at the same time to meet the requirements of automobile braking system.
[0005] The technical scheme adopted by the utility model is that it includes a static iron, a valve sleeve, a primary valve core return spring, a primary valve core component, a base, a secondary valve core, a sleeve and a secondary valve core return spring, wherein the valve sleeve is fixedly connected to the static iron, the primary valve core component is arranged inside the valve sleeve, and its upper end is limited by the static iron, the lower end of the valve sleeve is fixedly connected to the upper end of the base, the secondary valve core is located below the steel ball of the primary valve core component, the lower end of the secondary valve core is located above the base, the primary valve core component, the secondary valve core and the base are arranged together on the axis, the primary valve core component can move axially in a straight line inside the valve sleeve, the upper part of the sleeve is interference fit with the bottom of the moving iron, and the secondary valve core and the secondary valve core return spring are limited in sliding, the primary valve core return spring is located in the moving iron of the primary valve core component, and its top is connected with the static iron, and the secondary valve core return spring is also pre-stressed.
[0006] The stationary iron and the valve sleeve are fixed by laser welding, and the valve sleeve and the base are fixed by laser welding.
[0007] The primary valve core component comprises a moving iron and a steel ball. The steel ball is located in a ball groove at the lower part of the moving iron. The moving iron and the steel ball can perform axial linear motion.
[0008] A liquid hole is arranged on the side wall of the base.
[0009] The cone surface at the upper end of the secondary valve core and the steel ball of the primary valve core component form a valve port sealing structure, the arc surface at the lower end of the secondary valve core and the cone surface of the base form a valve port sealing structure, and a symmetrical guide groove is processed around the secondary valve core.
[0010] The secondary valve core is formed by using high temperature resistant, wear resistant and non-deformable PEEK material.
[0011] The side wall of the sheath is provided with a liquid passing hole.
[0012] The secondary valve core return spring is sleeved on the outside of the valve core.
[0013] The retaining ring is press-fitted on the largest flange surface at the lower end of the valve sleeve.
[0014] The base is externally interference fitted with the filter screen.
[0015] The utility model has the advantages of novel structure, using basic principles of mechanics, fluid mechanics, etc. to improve the response time of the solenoid valve and increase the flow area at the same time. The secondary valve core serves as the valve seat in the primary valve structure and as the valve core in the secondary valve structure, which can play a role in mutual conversion. At the same time, symmetrical guide grooves are processed around the secondary valve core to avoid flow obstruction. Its working state can be divided into two states: power-on and power-off. Its function is to adjust the direction and flow of the medium in the system to meet the needs of the automobile braking system for a large-flow solenoid valve. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural schematic diagram of the utility model;
[0017] Figure 2 It is a structural schematic diagram of the primary valve core component of the utility model;
[0018] Figure 3 It is a structural schematic diagram of the primary valve structure A of the utility model;
[0019] Figure 4 It is a structural schematic diagram of the secondary valve structure B of the utility model. DETAILED DESCRIPTION
[0020] like Figure 1 As shown, it includes a static iron 1, a valve sleeve 2, a primary valve core return spring 3, a primary valve core component 4, a base 5, a secondary valve core 6, a sleeve 7 and a secondary valve core return spring 8, wherein the valve sleeve 2 is fixedly connected to the static iron 1, the primary valve core component 4 is arranged inside the valve sleeve 2, and its upper end is limited and sealed by the static iron 1, the lower end of the valve sleeve 2 is fixedly connected to the upper end of the base 5, the secondary valve core 6 is located below the steel ball 402 of the primary valve core component 4, and the lower end of the secondary valve core 6 is located above the base 5, the primary valve core component 4, the secondary valve core 6 and the base 5 are arranged together on the axis, the primary valve core component 4 can move axially in a straight line inside the valve sleeve 2, the upper part of the sleeve 7 is interference fit with the bottom of the moving iron 401, and the secondary valve core 6 and the secondary valve core return spring 8 are limited in sliding, the primary valve core return spring 3 is located in the moving iron 401 of the primary valve core component 4, and its top is connected to the static iron 1, and the secondary valve core return spring 8 is also pre-pressed.
[0021] The stationary iron 1 and the valve sleeve 2 are fixed by laser welding, and the valve sleeve 2 and the base 5 are fixed by laser welding to ensure strength and meet sealing requirements.
[0022] like Figure 2 As shown, the primary valve core component 4 includes a moving iron 401 and a steel ball 402. The steel ball 402 is located in a ball groove at the lower part of the moving iron 401. The moving iron 401 and the steel ball 402 can perform axial linear motion.
[0023] The side wall of the base 5 is provided with a liquid passage hole.
[0024] like Figure 4 As shown, the upper conical surface of the secondary valve core 6 and the steel ball 402 of the primary valve core component 4 form a valve port sealing structure, the lower arc surface of the secondary valve core 6 and the conical surface of the base 5 form a valve port sealing structure, and a symmetrical guide groove 601 is processed around the secondary valve core 6 to avoid flow obstruction.
[0025] The secondary valve core 6 is formed by processing with the PEEK material which is resistant to high temperature, wear and deformation.
[0026] The side wall of the sheath 7 is provided with a liquid passing hole.
[0027] The secondary valve core return spring 8 is sleeved on the outside of the valve core 6 .
[0028] A retaining ring 9 is press-fitted on the largest flange surface at the lower end of the valve sleeve 2 to protect the valve sleeve 2 and the base 5 from deformation during riveting.
[0029] The base 5 is externally interference fitted with the filter screen 10 .
[0030] How it works
[0031] like Figure 3 As shown, the steel ball 402 in the primary valve core component 4 and the secondary valve core 6 form a primary valve structure A, as shown in FIG. Figure 4 As shown, the secondary valve core 6 and the base 5 form a secondary valve structure B, which is axially limited by the primary valve return spring 3. The secondary valve core 6 serves as a valve seat in the primary valve structure A and as a valve core in the secondary valve structure B, and they play a role in mutual conversion.
[0032] The utility model is in a non-powered working state and Figure 1 The assembly state shown is the same. When the external coil of the solenoid valve is not energized, the two-stage valve port positions are both closed, and the inlet and outlet of the side and bottom are blocked, that is, they remain normally closed.
[0033] When the external coil of the solenoid valve is energized, the static iron 1 generates magnetic force to overcome the resistance of the primary valve core return spring 3 and attract the primary valve core component 4 to move upward, the primary valve structure A opens, the steel ball 402 and the secondary valve core 6 are no longer sealed, and the lateral liquid flows through the filter screen 10, the liquid holes on the side wall of the base 5, the flow channel between the sheath 7 and the base 5, the liquid holes on the side wall of the sheath 7, and the valve port between the steel ball 402 and the secondary valve core 6 into the center hole of the secondary valve core 6, and then flows out from the base 5, so that the side inlet and the bottom outlet are connected, so that the liquid path is opened;
[0034] As the inlet and outlet pressure difference on both sides of the liquid flow gradually decreases, the secondary valve core 6 moves upward under the spring force of the secondary valve core return spring 8 and begins to separate from the base 5. During the upward movement of the secondary valve core 6, the liquid flows toward the base 5 through the center hole of the secondary valve core 6 and the circumferentially arranged fluid guide groove 601, which can avoid the impact pressure generated when the lateral liquid flows through the secondary valve core 6 too quickly, hindering the opening of the secondary valve structure B and affecting the response time and flow. After the secondary valve structure B is opened normally, it provides a large flow, and at the same time the primary valve structure A is closed, and the liquid flows directly through the throttle port of the secondary valve B.
[0035] The liquid inlet mode of the utility model is side-in and bottom-out, and can work normally when there is a large pressure difference between the side and the bottom, while providing a large flow rate and a quick response.
Claims
1. A large flow solenoid valve for automobile braking system, characterized by: It includes a static iron, a valve sleeve, a primary valve core return spring, a primary valve core component, a base, a secondary valve core, a sleeve and a secondary valve core return spring, wherein the valve sleeve is fixedly connected to the static iron, the primary valve core component is arranged inside the valve sleeve, and its upper end is limited by the static iron seal, the lower end of the valve sleeve is fixedly connected to the upper end of the base, the secondary valve core is located below the steel ball of the primary valve core component, the lower end of the secondary valve core is located above the base, the primary valve core component, the secondary valve core and the base are arranged together on the axis, the primary valve core component can move axially in a straight line inside the valve sleeve, the upper part of the sleeve is interference fit with the bottom of the moving iron, and the secondary valve core and the secondary valve core return spring are limited in sliding, the primary valve core return spring is located in the moving iron of the primary valve core component, and its top is connected to the static iron, and the secondary valve core return spring is also pre-pressed; The cone surface at the upper end of the secondary valve core and the steel ball of the primary valve core component form a valve port sealing structure, the arc surface at the lower end of the secondary valve core and the cone surface of the base form a valve port sealing structure, and a symmetrical guide groove is processed around the secondary valve core.
2. The large flow solenoid valve for automobile brake system according to claim 1, characterized in that: The stationary iron and the valve sleeve are fixed by laser welding, and the valve sleeve and the base are fixed by laser welding.
3. The large flow solenoid valve for automobile brake system according to claim 1, characterized in that: The primary valve core component comprises a moving iron and a steel ball. The steel ball is located in a ball groove at the lower part of the moving iron. The moving iron and the steel ball can perform axial linear motion.
4. The large flow solenoid valve for automobile brake system according to claim 1, characterized in that: A liquid hole is arranged on the side wall of the base.
5. The large flow solenoid valve for automobile brake system according to claim 1, characterized in that: The secondary valve core is formed by using high temperature resistant, wear resistant and non-deformable PEEK material.
6. The large flow solenoid valve for automobile brake system according to claim 1, characterized in that: The side wall of the sheath is provided with a liquid passing hole.
7. The large flow solenoid valve for automobile brake system according to claim 1, characterized in that: The secondary valve core return spring is sleeved on the outside of the valve core.
8. The large flow solenoid valve for automobile brake system according to claim 1, characterized in that: The retaining ring is press-fitted on the largest flange surface at the lower end of the valve sleeve.
9. The large flow solenoid valve for automobile brake system according to claim 1, characterized in that: The base is externally interference fitted with the filter screen.