An adjustable flow pressure relief valve

Abstract

The utility model relates to an adjustable flow pressure relief valve belongs to the automobile brake system component technical field. The sealing seat fixed connection is in the valve body, and the sealing steel ball is located between the sealing seat and the valve core, and the valve core and the piston are located in the valve body, and there is the sealing ring between the piston and the valve body, and the spring is located between the valve core and the piston, and the valve core drives the core rod to slide in the piston, and the limit valve seat is connected with the valve body one end thread, and the limit block is located between the piston and the limit valve seat. The advantage is novel structure, increases the pressure relief valve in the hydraulic brake system, can according to the different pressure demand of product, through matching the core rod of different diameter, adjusts the clearance size of core rod and piston, controls the flow of pressure relief, when system pressure exceeds the set value, the pressure relief valve will open automatically, protects the whole brake system, guarantees that the hydraulic brake system still will keep the required pressure after pressure relief, satisfies the system pressure requirement, makes the system can work stably, and the matching is flexible, is applicable to the product of different pressure.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive braking system components, and is applied to hydraulic braking systems, specifically an adjustable flow pressure relief valve. Background Technology

[0002] In automotive hydraulic braking systems, pressure control is a crucial aspect of ensuring driving safety. Hydraulic electronic brake boosters use a motor-driven piston to build pressure. When ABS is activated, the instantaneous pressure can exceed the motor's rated load, potentially damaging it. Therefore, a pressure relief valve is added to the system. When the system pressure exceeds a set value, the valve automatically opens to protect the entire braking system, while simultaneously maintaining the necessary pressure to meet system requirements.

[0003] Therefore, it is necessary to develop a pressure relief valve that can control the flow rate according to the different pressure requirements of the product, so as to ensure that the system always maintains the required pressure and that the system can work stably. Summary of the Invention

[0004] This invention provides an adjustable flow pressure relief valve to solve the problem that the instantaneous pressure generated when the ABS is activated exceeds the rated load of the motor, causing damage to the motor due to the absence of a pressure relief valve.

[0005] The technical solution adopted by this utility model includes a valve body, a sealing seat, a sealing steel ball, a valve core, a sealing ring, a spring, a piston, a core rod, a limiting block, and a limiting valve seat. The sealing seat is fixedly connected in the valve body, the sealing steel ball is located between the sealing seat and the valve core, the valve core and the piston are located in the valve body, a sealing ring is located between the piston and the valve body, the spring is located between the valve core and the piston, the valve core drives the core rod to slide in the piston, the limiting valve seat is threadedly connected to one end of the valve body, and the limiting block is located between the piston and the limiting valve seat.

[0006] The valve body has an inlet hole.

[0007] The valve core has a groove.

[0008] There is a gap between the core rod and the piston for liquid to pass through. The flow rate of pressure relief can be controlled by adjusting the size of this gap.

[0009] The gap is connected to the groove on the valve core.

[0010] The limiting block has two grooves.

[0011] The second groove is connected to the gap.

[0012] The limit valve seat has a liquid outlet hole.

[0013] The advantages of this utility model are its novel structure. By adding a pressure relief valve to the hydraulic braking system, the gap between the mandrel and the piston can be adjusted according to the different pressure requirements of the product by matching mandrels of different diameters, thus controlling the pressure relief flow. When the system pressure exceeds the set value, the pressure relief valve will automatically open to protect the entire braking system. This ensures that the hydraulic braking system will still maintain the required pressure after pressure relief, meeting the system pressure requirements and enabling the system to work stably. It is flexible in matching and suitable for products with different pressures. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the valve core of this utility model; Figure 3 yes Figure 2 AA section view; Figure 4 This is a schematic diagram of the structure of the gap between the piston and the core rod of this utility model; Figure 5 This is a schematic diagram of the structure of this utility model; Figure 6 yes Figure 5 BB cross-sectional view. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. It should be understood that conventional techniques and components known to those skilled in the art will not be detailed in this specification.

[0017] See Figure 1 The valve body includes a valve body 1, a sealing seat 2, a sealing steel ball 3, a valve core 4, a sealing ring 5, a spring 6, a piston 7, a core rod 8, a limiting block 9, and a limiting valve seat 10. The sealing seat 2 is fixedly connected in the valve body 1. The sealing steel ball 3 is located between the sealing seat 2 and the valve core 4. The valve core 4 and the piston 7 are located in the valve body 1. There is a sealing ring 5 between the piston 7 and the valve body 1. The spring 6 is located between the valve core 4 and the piston 7. The valve core 4 drives the core rod 8 to slide in the piston 7. The limiting valve seat 10 is threaded to one end of the valve body 1. The limiting block 9 is located between the piston 7 and the limiting valve seat 10.

[0018] See Figure 1 The valve body 1 has a liquid inlet hole 101.

[0019] See Figure 2 , 3 The valve core 4 has a groove 401.

[0020] See Figure 4 There is a gap 701 between the core rod 8 and the piston 7 for liquid to pass through. The flow rate of pressure relief can be controlled by adjusting the size of this gap.

[0021] The gap 701 is connected to the groove 401 on the valve core 4.

[0022] See Figure 5 , 6 The limiting block 9 has a groove 901.

[0023] The groove 901 is connected to the gap 701.

[0024] See Figure 1 The limiting valve seat 10 has a liquid outlet hole 1001.

[0025] Working principle This invention is added to a hydraulic braking system. When the system pressure is overloaded, the brake fluid overcomes the resistance of the spring 6 through the inlet hole 101, pushing the sealing steel ball 3 to drive the valve core 4 forward. The valve core 4 pushes the mandrel 8, and the fluid passes through the groove 401 of the valve core 4, the gap 701 between the mandrel 8 and the piston 7, and the groove 901 on the limiting block, finally exiting from the outlet hole 1001. The gap 701 between the mandrel 8 and the piston 7 restricts the fluid to flow out slowly, preventing the pressure from being released quickly and maintaining the required system pressure. The size of the gap 701 can be adjusted by using mandrels of different diameters to regulate the flow rate and ensure the pressure required by different products.

[0026] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the scope of protection of the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, any equivalent substitutions or modifications made by those skilled in the art based on the technical solution and the inventive concept of the present invention within the scope of the technical concept disclosed in the present invention shall all fall within the scope of protection of the present invention.

Claims

1. A pressure relief valve with adjustable flow rate, characterized in that: The valve includes a valve body, a sealing seat, a sealing steel ball, a valve core, a sealing ring, a spring, a piston, a core rod, a limit block, and a limit valve seat. The sealing seat is fixedly connected in the valve body. The sealing steel ball is located between the sealing seat and the valve core. The valve core and the piston are located in the valve body. There is a sealing ring between the piston and the valve body. The spring is located between the valve core and the piston. The valve core drives the core rod to slide in the piston. The limit valve seat is threaded to one end of the valve body. The limit block is located between the piston and the limit valve seat.

2. The pressure relief valve with adjustable flow rate according to claim 1, characterized in that: The valve body has an inlet hole.

3. The pressure relief valve with adjustable flow rate according to claim 1, characterized in that: The valve core has a groove.

4. The adjustable flow pressure relief valve according to claim 1, characterized in that: There is a gap between the core rod and the piston for liquid to pass through. The flow rate of pressure relief can be controlled by adjusting the size of this gap.

5. A pressure relief valve with adjustable flow rate according to claim 4, characterized in that: The gap is connected to the groove on the valve core.

6. The pressure relief valve with adjustable flow rate according to claim 1, characterized in that: The limiting block has two grooves.

7. A pressure relief valve with adjustable flow rate according to claim 6, characterized in that: The second groove is connected to the gap.

8. The pressure relief valve with adjustable flow rate according to claim 1, characterized in that: The limit valve seat has a liquid outlet hole.

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