An integrated on-off valve for active suspension high pressure oil pipe

Abstract

The utility model belongs to the field of manual switch valve for automobile active suspension pipeline relates to a kind of integrated switch valve for active suspension high-pressure oil pipe, including the movable installation of conical surface integrated sealing valve core in valve body, valve body is clamped on shock absorber interface, first sealing pad layer and third sealing pad layer are provided between valve body and shock absorber interface, second sealing pad layer is equipped between valve body and conical surface integrated sealing valve core;The end of conical surface integrated sealing valve core close to shock absorber interface is equipped with conical surface sealing head, and the other end of conical surface integrated sealing valve core is equipped with threaded plug.The utility model ensures the hydraulic oil pressure stability in active suspension system by multilayer sealing structure;Conical surface sealing head and valve body form linear contact sealing, can more effectively block oil leakage under high pressure environment, adopt conical surface integrated sealing valve core, reduce the number and connecting point of subcomponent, improve the overall service life of switch valve.

Description

Technical Field

[0001] This utility model relates to the field of manual switching valves for automotive active suspension pipelines, and more particularly to an integrated switching valve for active suspension high-pressure oil lines. Background Technology

[0002] As the battery range of new energy vehicles increases, the overall vehicle weight also increases sharply, generally by 20% to 50%. Traditional passive suspensions need to provide a higher ability to absorb road bumps on some bumpy roads, which is difficult for traditional mechanical suspensions and air suspensions to achieve. At the same time, with the development of vision recognition technology, vision recognition combined with hydraulic fully active suspension has become a solution for high-end cars to meet the shock absorption requirements on bumpier roads and improve the driving experience.

[0003] However, the traditional filling method in active suspension systems can lead to air in the fluid of components. Excessive air during active suspension operation can cause cavitation, which accelerates product damage and causes hydraulic oil overheating. Therefore, the segmented filling scheme is the preferred solution.

[0004] Meanwhile, considering that during routine maintenance, when the shock absorber needs to be replaced, to prevent more air from being introduced due to difficulties in refilling later, a manual on / off valve for use at up to 200 bar is designed on the active suspension pipeline to meet traditional operation and maintenance and refilling requirements. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides an integrated switching valve for high-pressure oil pipes in active suspension systems.

[0006] The technical solution of this utility model is achieved through the following scheme: an integrated switching valve for a high-pressure oil pipe of an active suspension, comprising a valve body, a conical integrated sealing valve core, a shock absorber interface and a high-pressure oil pipe, wherein the conical integrated sealing valve core is movably installed in the valve body, the high-pressure oil pipe is connected to the side of the valve body, the valve body is snapped onto the shock absorber interface, a first sealing gasket layer and a third sealing gasket layer are provided between the valve body and the shock absorber interface, and a second sealing gasket layer is provided between the valve body and the conical integrated sealing valve core; The cone-shaped integrated sealing valve core has a cone-shaped sealing head at one end near the shock absorber interface, and a threaded plug at the other end.

[0007] Through the above technical solutions, the multi-layered sealing structure effectively prevents high-pressure oil leakage at various connection points, ensuring stable hydraulic oil pressure in the active suspension system. The conical sealing head can form a line contact seal with the valve body during sealing, resulting in a smaller sealing area and higher pressure. This allows for more effective prevention of oil leakage under high-pressure environments. At the same time, the conical sealing head can also compensate for sealing gaps caused by component machining errors or wear to a certain extent. The use of an integrated conical sealing valve core reduces the number of sub-components and connection points, improving the overall service life of the switching valve and sealing reliability.

[0008] Preferably, the valve body has a sealing groove at one end near the shock absorber interface, and the first sealing gasket is located in the sealing groove. The first sealing gasket includes a main sealing ring and an auxiliary sealing ring, which are installed in the sealing groove from top to bottom.

[0009] Preferably, the second sealing gasket layer and the first sealing gasket layer have the same structure.

[0010] Preferably, a cover is detachably installed on the open end of the valve body away from the shock absorber interface, and a locking ring is installed inside the open end of the valve body away from the shock absorber interface.

[0011] Through the above technical solutions, the auxiliary sealing ring can effectively prevent high-pressure oil leakage, while the main sealing ring enhances the sealing stability. When the auxiliary sealing ring experiences minor deformation or wear, the main sealing ring can promptly replenish the sealing effect, preventing oil leakage. The dual sealing rings greatly improve the reliability and durability of the seal, reduce hydraulic oil leakage caused by seal failure, and ensure the normal operation of the active suspension system. The locking ring limits the valve core, ensuring that the valve core is in the preset accurate position when the oil is opened.

[0012] Preferably, both the valve body surface and the conical integrated sealing valve core surface are covered with a zinc-nickel alloy protective layer.

[0013] Preferably, the valve body has a slope that matches the conical sealing head.

[0014] Preferably, the inner cavity of the high-pressure oil pipe is connected to the inner cavity of the valve body through an oblique flow hole.

[0015] Through the above technical solutions, the conical sealing head can achieve a tighter fit when in contact with the slope. Compared with traditional flat seals or other forms of seals, the conical surface and the slope form a line seal, which has better sealing performance and can effectively prevent high-pressure oil leakage between the valve body and the valve core. The oblique flow hole causes the oil to rotate and disturb during the flow process, reducing the impact force of the oil on the inner cavity of the valve body and improving the service life of the switching valve.

[0016] In summary, this utility model has the following beneficial effects: 1. This utility model effectively prevents high-pressure oil leakage at various connection points through a multi-layered sealing structure, ensuring stable hydraulic oil pressure in the active suspension system; the conical sealing head can form a line contact seal with the valve body during sealing, resulting in a smaller sealing area and higher pressure, which can more effectively block oil leakage under high pressure. At the same time, the conical sealing head can also compensate for the sealing gap caused by component processing errors or wear to a certain extent. The use of a conical integrated sealing valve core reduces the number of sub-components and connection points, improving the overall service life of the switching valve and sealing reliability.

[0017] 2. The auxiliary sealing ring effectively prevents high-pressure oil leakage, while the main sealing ring enhances sealing stability. When the auxiliary sealing ring experiences minor deformation or wear, the main sealing ring can promptly replenish the sealing effect, preventing oil leakage. The dual sealing rings significantly improve the reliability and durability of the seal, reducing hydraulic oil leakage caused by seal failure and ensuring the normal operation of the active suspension system. The locking ring limits the valve core, ensuring that the valve core is in the preset accurate position when the oil is opened.

[0018] 3. The conical sealing head can achieve a tighter fit when in contact with the slope. Compared with traditional flat seals or other forms of seals, the conical surface and the slope form a line seal, which has better sealing performance and can effectively prevent high-pressure oil leakage between the valve body and the valve core. The oblique flow hole causes the oil to rotate and disturb during the flow process, reducing the impact force of the oil on the inner cavity of the valve body and improving the service life of the switching valve. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure from the main perspective of this utility model; Figure 2 This is a top-view structural diagram of the present invention; Figure 3 This is a schematic diagram of the cross-sectional structure of the present invention in the closed state from a CC perspective; Figure 4 This is a schematic diagram of the cross-sectional structure of the present invention in its open state from a CC perspective; Figure 5 yes Figure 3 Enlarged schematic diagram of the structure at point B.

[0020] Explanation of reference numerals in the attached drawings: 100, high-pressure oil pipe; 101, shock absorber interface; 1, valve body; 2, conical integrated sealing valve core; 21, threaded plug; 22, conical sealing head; 3, first sealing gasket; 31, main sealing retaining ring; 32, auxiliary sealing retaining ring; 4, second sealing gasket; 5, third sealing gasket; 6, locking ring; 7, cover. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features and advantages of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification. The present invention will be further described in detail below with reference to the accompanying drawings.

[0023] An integrated on / off valve for high-pressure oil lines in active suspension, such as Figures 1-5 As shown, the system includes a valve body 1, a cone-shaped integrated sealing valve core 2, a shock absorber interface 101, and a high-pressure oil pipe 100. The cone-shaped integrated sealing valve core 2 is movably installed inside the valve body 1. The high-pressure oil pipe 100 connects to the side of the valve body 1. The valve body 1 is snapped onto the shock absorber interface 101. A first sealing gasket 3 and a third sealing gasket 5 are provided between the valve body 1 and the shock absorber interface 101. A second sealing gasket 4 is provided between the valve body 1 and the cone-shaped integrated sealing valve core 2. The first sealing gasket 3 and the third sealing gasket 5 provide a double seal for the valve body 1. The integrated valve core not only improves the reliability of the product system by reducing the number of sub-components and the connection method, but also optimizes the sealing ring groove and valve core size of the integrated valve core. By optimizing the shaft hole fit, not only static sealing can be achieved, but also sealing can be achieved during the opening and closing process under high pressure. This reduces the process of sealing ring damage during the opening and closing of the valve, thereby improving the sealing reliability of the product. Whether it is static sealing or dynamic sealing reliability, the feasibility of pre-filling is realized, which has a significant effect on improving the assembly cycle of the whole vehicle.

[0024] The cone-shaped integrated sealing valve core 2 has a cone-shaped sealing head 22 at one end near the shock absorber interface 101, and a threaded plug 21 at the other end. Both the cone-shaped sealing head 22 and the threaded plug 21 are integrally formed on the cone-shaped integrated sealing valve core 2. The valve body 1 has a slope that matches the cone-shaped sealing head 22. There is a 2-degree angle difference between the cone-shaped sealing head 22 and the valve body 1. The slope of the inner cavity of the valve body 1 matches the angle of the cone-shaped sealing head 22, allowing for a tight fit during sealing. This not only innovatively establishes an optimized linear seal... The valve body 1 is made of structural steel, and the valve core is made of electrolytic copper. By applying a tightening torque of >5 Nm, the line seal will become a tight sealing surface with a diameter of about 2 mm. At the same time, the structural design of the valve body 1 and the cone-shaped integrated sealing valve core 2 also has a self-guiding function, thereby reducing leakage failure caused by poor coaxiality of the valve body 1 and valve core due to machining, thus improving the redundancy of the seal. Tightening the threaded plug 21 at the upper end of the cone-shaped integrated sealing valve core 2 allows the valve core to move up and down in the inner cavity of the valve body 1.

[0025] A sealing groove is opened at one end of the valve body 1 near the shock absorber interface 101. The first sealing gasket 3 is located in the sealing groove. The first sealing gasket 3 includes a main sealing ring 31 and an auxiliary sealing ring 32. The main sealing ring 31 and the auxiliary sealing ring 32 are installed in the sealing groove from top to bottom. The main sealing ring 31 is preferably a PTFE ring with a square end face, and the auxiliary sealing ring 32 is preferably an HNBR hydrogenated nitrile rubber O-ring. The third sealing gasket 5 is a dustproof ring with an O-ring on the end face. The third sealing gasket 5 is located at the end of the insertion part between the valve body 1 and the shock absorber interface 101. The dustproof ring can effectively block external impurities and protect the internal sealing gasket and valve body 1 structure. Even if the first sealing gasket 3 has a slight leakage or a decrease in sealing performance, the dustproof ring can still isolate the inside from the outside, providing additional protection for the system. By adopting different sealing combination forms, not only can the sealing performance of the product be improved, but also the redundancy of the product under different working conditions can be improved.

[0026] The second sealing gasket 4 has the same structure as the first sealing gasket 3, and is also composed of the main sealing ring 31 and the auxiliary sealing ring 32. The cone-shaped integrated sealing valve core 2 has a sealing groove, and the second sealing gasket 4 is located in the sealing groove, and is also arranged sequentially from top to bottom.

[0027] HNBR hydrogenated nitrile butadiene rubber has good oil resistance and will not swell or deform due to long-term contact with oil, thus maintaining good sealing performance. The structure of the O-ring allows it to elastically deform under pressure, filling the tiny gaps between the sealing surfaces and enhancing the sealing effect. PTFE (polytetrafluoroethylene) material has excellent chemical stability and an extremely low coefficient of friction. When the valve body 1 and the shock absorber interface 101 move relative to each other or are subjected to pressure impact, it can effectively reduce wear and ensure the durability of the seal. The square end face design allows it to fit better with the sealing groove and contact surface, forming a stable sealing interface and preventing oil leakage. When used in conjunction with the auxiliary sealing ring 32, the auxiliary sealing ring 32 first bears the main pressure and blocks most of the oil, while the main sealing ring 31 provides supplementary sealing for the remaining minor leaks, forming a double guarantee.

[0028] Both the surface of the valve body 1 and the surface of the cone-shaped integrated sealing valve core 2 are covered with a zinc-nickel alloy protective layer. In order to meet the corrosion resistance requirements of the entire vehicle throughout its entire life cycle, zinc alloy electroplating technology is used to coat the entire switching valve with a zinc-nickel alloy protective layer with a thickness of 6-14um to meet the corrosion resistance requirements of the entire vehicle throughout its entire life cycle.

[0029] A cover 7 is detachably installed at the open end of the valve body 1 away from the shock absorber interface 101. A locking ring 6 is installed inside the open end of the valve body 1 away from the shock absorber interface 101. The locking ring 6 is installed at the open end of the valve body 1 and can limit the movement of the internal integrated sealed valve core. During the operation of the valve, the valve core will be subjected to the force of high pressure oil and will tend to move. The locking ring 6 can prevent the valve core from excessive displacement in the axial direction, ensure the relative position accuracy between the valve core and the valve body 1, and thus maintain good sealing performance and accurate switching action.

[0030] The inner cavity of the high-pressure oil pipe 100 is connected to the inner cavity of the valve body 1 through an oblique flow hole. The oblique flow hole reduces the local resistance of the oil during the flow process, allowing the oil to enter the valve body 1 at a certain angle, slowing down the impact speed of the oil, reducing the impact force on the valve body 1 and the seals, extending the service life of the switching valve, and maintaining the pressure balance inside the valve body 1 with stable oil flow, reducing the impact of pressure fluctuations on the seals.

[0031] Based on theoretical calculations and static simulation-driven optimization of wall thickness and structural design, the strength meets at least a safety factor of 3. The working pressure of its active suspension system is approximately 110 bar. When the manual switch valve is open, the equivalent stress at 330 bar has a maximum value of 311.77 MPa, which is less than the yield stress of 45# steel (355 MPa). When the manual switch valve is closed, the equivalent stress at 60 bar has a maximum value of 199.44 MPa, which is also less than the yield stress of 45# steel (355 MPa). Therefore, the structural design of this switch valve has extremely excellent strength verification and safety factor.

[0032] Working principle: Remove the cover 7 and unscrew the cone-shaped integrated sealing valve core 2 in the valve body 1 until it hits the locking ring 6 at the opening of the valve body 1; During the filling process, hydraulic oil enters the inner cavity area of ​​the high-pressure oil pipe 100, and then enters the area where the conical sealing head 22 of the conical integrated sealing valve core 2 is located in the inner cavity of the valve body 1 through the oblique flow hole. Further hydraulic oil flows through the conical sealing head 22 and enters the axial connection hole of the shock absorber, reaching the shock absorber with a small pressure loss.

[0033] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. An integrated switching valve for high-pressure oil lines in active suspension systems, characterized in that: The device includes a valve body (1), a cone-shaped integrated sealing valve core (2), a shock absorber interface (101), and a high-pressure oil pipe (100). The cone-shaped integrated sealing valve core (2) is movably installed inside the valve body (1). The high-pressure oil pipe (100) connects to the side of the valve body (1). The valve body (1) is snapped onto the shock absorber interface (101). A first sealing gasket layer (3) and a third sealing gasket layer (5) are provided between the valve body (1) and the shock absorber interface (101). A second sealing gasket layer (4) is provided between the valve body (1) and the cone-shaped integrated sealing valve core (2). The cone-shaped integrated sealing valve core (2) has a cone-shaped sealing head (22) at one end near the shock absorber interface (101), and a threaded plug (21) at the other end.

2. The integrated on-off valve for high pressure oil line of active suspension according to claim 1, characterized in that: The valve body (1) has a sealing groove at one end near the shock absorber interface (101). The first sealing gasket (3) is located in the sealing groove. The first sealing gasket (3) includes a main sealing ring (31) and an auxiliary sealing ring (32). The main sealing ring (31) and the auxiliary sealing ring (32) are installed in the sealing groove from top to bottom.

3. The integrated on-off valve for high pressure oil line of active suspension according to claim 2, characterized in that: The second sealing gasket layer (4) and the first sealing gasket layer (3) have the same structure.

4. The integrated switching valve for high-pressure oil pipes in active suspension according to claim 1, characterized in that: A cover (7) is detachably installed on the open end of the valve body (1) away from the shock absorber interface (101), and a locking ring (6) is installed inside the open end of the valve body (1) away from the shock absorber interface (101).

5. The integrated on-off valve for high pressure oil line of active suspension according to claim 1, characterized in that: The surface of the valve body (1) and the surface of the cone-shaped integrated sealing valve core (2) are both covered with a zinc-nickel alloy protective layer.

6. The integrated switching valve for high-pressure oil pipes in active suspension according to claim 1, characterized in that: The valve body (1) has a slope that matches the conical sealing head (22).

7. The integrated switching valve for high-pressure oil pipes in active suspension according to claim 1, characterized in that: The inner cavity of the high-pressure oil pipe (100) is connected to the inner cavity of the valve body (1) through an oblique flow hole.

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