Split type on-off valve for active suspension high pressure oil pipe

Abstract

The utility model belongs to the field of manual switch valve used by automobile active suspension pipeline, and relates to a split type switch valve for active suspension high pressure oil pipe, which comprises a conical split type inner valve core movably installed in the inner cavity of a valve body, a shock absorber interface clamped to the end of the valve body, a hydraulic pipe connected to the inner cavity of the valve body through an oil inlet inclined hole, a valve body flow channel formed in the valve body, and the conical split type inner valve core located between the oil inlet inclined hole and the valve body flow channel. The utility model adopts split type design, so that the rotating action of the screw plug is not directly transmitted to the sealing cone, the sealing cone can keep a relatively stable posture for pure axial movement, the valve core sealing layer will not be twisted due to rotation, and stress concentration in the sealing element is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of manual switching valves used in automotive active suspension pipelines, and in particular to a split-type switching valve for active suspension high-pressure oil pipes. Background Technology

[0002] As the battery range of new energy vehicles increases, the overall vehicle weight also increases sharply, generally by 20%-50%. This increased weight requires traditional passive suspensions to provide a greater ability to absorb road bumps on rougher surfaces. Traditional mechanical suspensions and air suspensions struggle to achieve this. Meanwhile, with the development of visual recognition technology, visual recognition combined with fully active hydraulic suspension has become a solution for high-end cars to meet the shock absorption requirements on even rougher 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, it is necessary to prevent more air from being introduced due to difficulties in refilling later. In the traditional integral valve core design, rotation often causes the entire valve core to rotate, which in turn causes the sealing ring installed on the valve core to twist. Once the sealing ring twists, its original regular shape will be destroyed, resulting in stress concentration inside the sealing ring, which is prone to cracks, damage and other defects. Therefore, a manual on / off valve that can be used at up to 200 bar needs to be designed and installed on the active suspension pipeline to meet the requirements of traditional operation and maintenance and refilling. Utility Model Content

[0005] In order to solve the above-mentioned existing technical problems, this utility model provides a split-type switching valve for high-pressure oil pipes of active suspension.

[0006] The technical solution of this utility model is achieved through the following scheme: a split-type switching valve for high-pressure oil pipe of active suspension, including a valve body, a conical split-type inner valve core, a shock absorber interface and a hydraulic pipe, wherein the conical split-type inner valve core is movably installed in the inner cavity of the valve body, the end of the valve body is snapped into the shock absorber interface, the hydraulic pipe is connected to the inner cavity of the valve body through an oil inlet oblique hole, a valve body flow channel is opened in the valve body, and the conical split-type inner valve core is located between the oil inlet oblique hole and the valve body flow channel; A valve body protective layer is provided between the valve body snap-fit ​​end and the shock absorber interface, and a valve core sealing layer is provided between the conical split inner valve core and the valve body.

[0007] Preferably, the conical split-type internal valve core includes a threaded plug and a sealing cone. The threaded plug is rotatably mounted on the end of the sealing cone away from the cone head. The sealing cone is movably mounted in the valve body through the threaded plug. An annular sealing groove is opened on the surface of the sealing cone, and the valve core sealing layer is installed in the annular sealing groove.

[0008] Preferably, the valve body has a ramp that matches the sealing cone head, and the end of the valve body cavity away from the shock absorber interface is provided with a limiting retaining ring.

[0009] Preferably, the valve body snap-fit ​​end surface is provided with a sealing groove, and the valve body protective layer includes a main sealing ring, an auxiliary sealing ring and a corner dustproof ring. The main sealing ring and the auxiliary sealing ring are arranged sequentially from bottom to top in the sealing groove, and the corner dustproof ring is located at the corner of the valve body snap-fit ​​end and the shock absorber interface end.

[0010] Preferably, a guide slope is provided between the hydraulic pipe clamp and the oil inlet oblique hole.

[0011] Preferably, the valve body is cross-shaped, with a fixing hole protruding from one side and an oil pipe clamping hole on the other side. The fixing hole is fixedly installed on the shock absorber interface by a fixing bolt.

[0012] In summary, this utility model has the following beneficial effects: 1. This utility model adopts a split design so that the rotation of the threaded plug is not directly transmitted to the sealing cone. The sealing cone can maintain a relatively stable posture and perform pure axial movement. The valve core sealing layer will not be torn due to rotation, reducing stress concentration inside the seal and thus preventing defects such as cracks and damage. This ensures that it can perform its sealing function normally and avoids hydraulic oil leakage caused by damage to the sealing ring.

[0013] 2. The double seal of the valve core sealing layer and the valve body protective layer can effectively prevent hydraulic oil from leaking between the valve core and the valve body and between the valve body and the shock absorber interface, ensuring the sealing reliability of the switching valve under high pressure environment, preventing system pressure drop and performance degradation caused by hydraulic oil leakage, and ensuring the stable operation of the active suspension system.

[0014] 3. When the sealing cone of the cone-shaped split internal valve core contacts the slope of the valve body, a line seal can be formed, which has higher sealing accuracy and lower leakage risk. It can achieve good sealing effect under low pressure, further improving the sealing performance of the on / off valve.

[0015] 4. The main sealing ring and the auxiliary sealing ring together form a double sealing structure. The main sealing ring, as the first line of defense, bears the main hydraulic pressure and prevents hydraulic oil leakage. The auxiliary sealing ring, as the second line of defense, further enhances the sealing effect. Even if the main sealing ring is slightly worn or damaged, the auxiliary sealing ring can still play a sealing role, improving the reliability of the seal.

[0016] 5. The corner dustproof ring can effectively prevent external dust and impurities from entering the valve body, extending the service life of the sealing ring and ensuring the long-term stable operation of the entire sealing system; the limit retaining ring ensures that the valve core always stays in the correct position during oil flow, and the thread self-locking of the threaded plug ensures the stability between the valve core and the valve body when oil is flowing.

[0017] 6. The guide slope combined with the oil inlet inclined hole reduces the flow resistance of hydraulic oil, allowing hydraulic oil to enter the valve body with a more stable flow rate and pressure; the valve body sealing snap-fit ​​combined with the fixing bolt assists in firmly installing it on the shock absorber interface, ensuring that the valve body will not loosen or shift during vehicle operation, and withstand various vibrations and impacts during vehicle operation, thus ensuring the normal operation of the hydraulic system. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a top-view structural diagram of the present invention; Figure 3 This is a cross-sectional view of the internal structure of the present invention in its open state; Figure 4 This is a cross-sectional internal structure diagram of the present invention in its closed state; Figure 5 yes Figure 4 An enlarged schematic diagram of the structure at point A.

[0019] Explanation of reference numerals in the attached diagram: 1. Valve body; 2. Conical split internal valve core; 21. Threaded plug; 22. Sealing cone; 3. Valve body protective layer; 31. Main sealing ring; 32. Auxiliary sealing ring; 33. Corner dustproof ring; 4. Valve core sealing layer; 5. Limiting retaining ring; 6. Shock absorber interface; 7. Hydraulic pipe; 8. Oil inlet oblique hole; 9. Fixing bolt; 10. Valve body flow channel. Detailed Implementation

[0020] 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.

[0021] 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.

[0022] A split-type on / off valve for high-pressure oil lines in active suspension, such as Figures 1-5 As shown, the valve includes a valve body 1, a conical split-type inner valve core 2, a shock absorber interface 6, and a hydraulic pipe 7. The conical split-type inner valve core 2 is movably installed inside the valve body 1. The end of the valve body 1 is snapped into the shock absorber interface 6. The hydraulic pipe 7 connects to the inner cavity of the valve body 1 through an inclined oil inlet hole 8. A valve body flow channel 10 is opened in the valve body 1. The conical split-type inner valve core 2 is located between the inclined oil inlet hole 8 and the valve body flow channel 10. The conical split-type inner valve core 2 can move up and down within the inner cavity of the valve body 1, thereby disconnecting or connecting the hydraulic pipe 7 and the valve body flow channel 10. The materials of body 1 and the cone-shaped split inner valve core 2 are preferably made of materials with approximately the same coefficient of thermal expansion. Even under temperature changes and corresponding thermal expansion and contraction, the components can still maintain reliable sealing. The valve core and valve body 1 of the metal cone seal have an angle difference, which can create an optimized line seal. Compared with the traditional face seal, the line seal has higher sealing accuracy and lower leakage risk. The cone seal has a self-guiding function, thereby reducing leakage failure caused by poor coaxiality of valve body 1 and valve core.

[0023] A valve body protective layer 3 is provided between the snap-fit ​​end of the valve body 1 and the shock absorber interface 6. A valve core sealing layer 4 is provided between the conical split inner valve core 2 and the valve body 1. The valve body protective layer 3 and the valve core sealing layer 4 provide sealing protection for the entire switch valve. The valve body protective layer 3 prevents external impurities from entering and internal oil from seeping out, and protects the sealing performance of the connection parts. The valve core sealing layer 4 directly prevents oil leakage in the inner cavity of the valve body 1, ensuring that the oil can only flow in the valve body flow channel 10.

[0024] like Figure 3 and Figure 4As shown, the conical split-type internal valve core 2 includes a threaded plug 21 and a sealing cone 22. The threaded plug 21 is rotatably mounted on the end of the sealing cone 22 away from the cone head. The sealing cone 22 is movably mounted inside the valve body 1 through the threaded plug 21. An annular sealing groove is opened on the surface of the sealing cone 22, and the valve core sealing layer 4 is installed in the annular sealing groove. The threaded plug 21 and the sealing cone 22 are separately set. The end of the sealing cone 22 and the threaded plug 21 are engaged and connected by a bearing. When the threaded plug 21 is turned, the rotational motion of the threaded plug 21 is transmitted to the sealing cone 22 and is converted into pure axial motion. This prevents the valve core sealing layer 4 on the surface of the sealing cone 22 from rotating relative to each other. This not only prevents the sealing ring of the valve core sealing layer 4 from twisting due to rotation, but also ensures the filling rate and compression rate of the seal, thereby improving the service life of the seal and the redundancy design of the sealing system.

[0025] The valve body 1 has a ramp that matches the cone head of the sealing cone 22. The end of the inner cavity of the valve body 1 away from the shock absorber interface 6 is provided with a limiting ring 5. The limiting ring 5 is located at the very end of the inner cavity of the valve body 1. When oil is supplied, the valve core will be subjected to a strong impact force from the hydraulic oil. The limiting ring 5 provides the maximum limit for the threaded plug 21. Together with the threaded plug 21, it can effectively resist the impact and ensure the integrity and safety of the overall structure of the switching valve.

[0026] like Figure 3 As shown, a guide slope is provided between the hydraulic pipe 7 clamp connector and the oil inlet inclined hole 8. The guide slope, together with the oil inlet inclined hole 8, effectively reduces the generation of eddies and turbulence, reduces energy loss, and ensures that the oil can flow stably and efficiently in the valve body 1, thereby improving the working performance and stability of the shock absorber. Combined with the conical sealing structure, the flow channels of the valve body 1 and the valve core are optimized, reducing pressure loss while maintaining a high sealing effect. According to the test, when the volumetric flow rate of the active suspension switching valve is 30L / min, the vertical flow channel pressure loss is 909.3pa, and the optimized flow channel pressure loss is 408.6pa.

[0027] like Figure 1 , Figure 2 and Figure 3 As shown, the valve body 1 is cross-shaped. A fixing hole protrudes from one side of the valve body 1. The fixing hole is fixedly installed on the shock absorber interface 6 by a fixing bolt 9. The fixing hole is matched with the hole of the shock absorber. The fixing bolt 9 cooperates with the valve body 1 to form a sealing engagement with the shock absorber interface 6. The double locking ensures that the oil can flow smoothly and stably in the valve body 1. Even in the face of complex road conditions and frequent vibrations, it can effectively prevent the valve body 1 from becoming loose or falling off the shock absorber interface 6, ensuring the stable operation of the entire shock absorption system. The other side of the valve body 1 is provided with an oil pipe engagement hole. The conical split inner valve core 2 is installed on the upper part of the cross-shaped valve body 1, and the valve body flow channel 10 is located at the lower part of the cross-shaped valve body 1.

[0028] The valve body 1 has a sealing groove on its snap-fit ​​end surface. The valve body protective layer 3 includes a main sealing ring 31, an auxiliary sealing ring 32, and a corner dustproof ring 33. The main sealing ring 31 and the auxiliary sealing ring 32 are arranged sequentially from bottom to top in the sealing groove. The corner dustproof ring 33 is located at the corner between the snap-fit ​​end of the valve body 1 and the end of the shock absorber interface 6. The snap-fit ​​end of the valve body 1 is inserted into the shock absorber interface 6. After the valve body 1 and the shock absorber interface 6 are assembled, the end face of the shock absorber interface 6 abuts against the end face of the valve body 1, and the corner dustproof ring 33 is provided at the corner. The main sealing ring 31 is preferably a large-size HNRB material O-ring, which has a large cross-section. The wire diameter allows for maximum surface contact, providing high pressure resistance and extrusion resistance. When used in conjunction with the auxiliary sealing ring 32, it also provides excellent sealing performance at low temperatures. The auxiliary sealing ring 32 is preferably made of polytetrafluoroethylene (PTFE) as the base material. PTFE can be used in a temperature range of -50°C to 200°C and has good resistance to all petroleum-based oils and related products, hot water, and seawater. It also has excellent weather resistance. The combination of HNBR and PTFE sealing elements can achieve excellent sealing performance and meet the requirements of high-temperature and high-pressure active suspension applications.

[0029] The valve core sealing layer 4 in the annular sealing groove on the surface of the sealing cone 22 has the same structure as the main sealing ring 31 and auxiliary sealing ring 32 that are sequentially superimposed in the sealing groove of the valve body 1. They are also composed of a large-size HNRB material O-ring and a PTFE retaining ring.

[0030] Working principle: The operator unscrews the sealing cone 22 integrated in the valve body 1 through the threaded plug 21 until it hits the limit ring 5; During the filling process, hydraulic oil enters the inner cavity area of ​​hydraulic pipe 7, and then enters the sealing cone 22 area through the oil inlet oblique hole 8; Further hydraulic oil flows through the sealing cone 22 into the axial connection hole of the shock absorber, reaching the shock absorber with a small pressure loss.

[0031] 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. A split-type switching valve for high-pressure oil lines in active suspension systems, characterized in that: The device includes a valve body (1), a cone-shaped split inner valve core (2), a shock absorber interface (6), and a hydraulic pipe (7). The cone-shaped split inner valve core (2) is movably installed in the inner cavity of the valve body (1). The end of the valve body (1) is snapped into the shock absorber interface (6). The hydraulic pipe (7) is connected to the inner cavity of the valve body (1) through an oil inlet inclined hole (8). A valve body flow channel (10) is opened in the valve body (1). The cone-shaped split inner valve core (2) is located between the oil inlet inclined hole (8) and the valve body flow channel (10). A valve body protective layer (3) is provided between the snap-fit ​​end of the valve body (1) and the shock absorber interface (6), and a valve core sealing layer (4) is provided between the conical split inner valve core (2) and the valve body (1).

2. The split-type switching valve for high-pressure oil pipes in active suspension according to claim 1, characterized in that: The conical split-type internal valve core (2) includes a threaded plug (21) and a sealing cone (22). The threaded plug (21) is rotatably installed at the end of the sealing cone (22) away from the cone head. The sealing cone (22) is movably installed in the valve body (1) through the threaded plug (21). The surface of the sealing cone (22) has an annular sealing groove, and the valve core sealing layer (4) is installed in the annular sealing groove.

3. A split-type switching valve for a high-pressure oil pipe in an active suspension system according to claim 2, characterized in that: The valve body (1) has a ramp that matches the cone head of the sealing cone (22), and a limiting ring (5) is provided at the end of the inner cavity of the valve body (1) away from the shock absorber interface (6).

4. A split-type switching valve for a high-pressure oil pipe in an active suspension system according to claim 1, characterized in that: The valve body (1) has a sealing groove on the snap-fit ​​end surface. The valve body protective layer (3) includes a main sealing ring (31), an auxiliary sealing ring (32), and a corner dustproof ring (33). The main sealing ring (31) and the auxiliary sealing ring (32) are arranged in the sealing groove from bottom to top. The corner dustproof ring (33) is located at the corner between the snap-fit ​​end of the valve body (1) and the end of the shock absorber interface (6).

5. A split-type switching valve for a high-pressure oil pipe in an active suspension system according to claim 1, characterized in that: A guide slope is provided between the hydraulic pipe (7) clamp and the oil inlet inclined hole (8).

6. A split-type switching valve for a high-pressure oil pipe in an active suspension system according to claim 1, characterized in that: The valve body (1) is cross-shaped. A fixing hole protrudes from one side of the valve body (1), and an oil pipe clamping hole is provided on the other side of the valve body (1). The fixing hole is fixedly installed on the shock absorber interface (6) by a fixing bolt (9).

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