A compression valve assembly for a silent shock absorber of an orbital vehicle

Abstract

The present invention relates to the technical field of shock absorber devices, and discloses a compression valve assembly of a silent shock absorber for rail vehicles, which includes a working cylinder assembly and an oil storage cylinder assembly. A compression valve seat is arranged at the lower end of the working cylinder. A compression valve screw is coaxially connected to the lower end of the compression valve seat. A compensation valve limiter is connected to the upper end of the compression valve seat. A compensation valve plate is connected between the compression valve seat and the compensation valve limiter. A compression valve sleeve is sleeved around the compression valve screw. A compression valve spring seat is connected to the outside of the compression valve seat. A compression valve spring is connected between the compression valve spring seat and the compression valve screw. A compression valve throttle plate is arranged between the compression valve spring seat and the compression valve seat. A compensation valve plate is connected between the compression valve seat and the compensation valve limiter. A compensation valve flow passage is opened on the compression valve seat, and support members are fixedly connected beside the compensation valve flow passage. A compensation valve oil line is fixedly connected to the upper end of the compression valve seat; and it has strong practicability.

Description

Technical Field

[0001] The present invention relates to the technical field of shock absorber devices, and specifically to a compression valve assembly of a silent shock absorber for rail vehicles. Background Art

[0002] Currently, in the field of shock absorbers, the noise of traditional oil pressure shock absorbers mainly comes from several aspects: 1. Noise generated by the friction between the piston rod and the oil seal; 2. Noise generated by the friction between the piston valve assembly and the side wall of the working cylinder; 3. Noise caused by the impact of the compensation valve plate of the compression valve assembly on the compression valve seat; 4. Noise generated by the circulating flow of the oil inside the shock absorber. Among them, especially during the opening and closing process of the compensation valve plate of the compression valve assembly, the slapping noise caused by continuously hitting the compression valve seat is the most serious.

[0003] Patent Application No. CN202222974143.5 discloses an adjustable shock absorber and a vehicle. Through the setting of the regulator assembly, the adjustment of the resistance can be achieved only by controlling the position of the adjustment bolt. Without changing the large structure and size, the damping force can be adjusted according to the customer's own preference by changing the flow area of the shock absorber oil. Moreover, the adjustment is convenient and can meet the requirements of softness and hardness required by the customer.

[0004] Chinese Patent with Application No. CN202110856594.6 discloses a single - cycle hydraulic oil circuit anti - hunting shock absorber. In the present invention, the compression valve and the compensation valve are integrated together, eliminating the need for a separate compensation valve, which can reduce the diameter, that is, the diameter of the damper can be reduced; during use, the valve plate and the throttle plate can generate different deformations according to the impact force (pressure) received. When the impact force is small, the deformations of the valve plate and the throttle plate are small, and the oil can flow out quickly, causing the piston rod to retract quickly. When the impact force is large, the deformations of the valve plate and the throttle plate are large, and the oil can only flow out through the throttle groove, making the piston rod have strong support and be able to retract slowly. When installed on the seat of a truck, it can make the seat more comfortable. However, the following problems still exist in actual applications, specifically:

[0005] 1. During the process of oil compensation flowing back to the working cylinder, it is necessary to continuously impact the compensation valve plate or the compression valve limiter at the compensation valve end of the compression valve assembly to allow the oil to flow back into the working cylinder. During this movement process, both the compensation valve plate and the compression valve limiter are in a floating - up - and - down motion. Due to the elastic force of the compensation valve spring or the spring retainer, when rebounding, they slap the oil line surface of the compression valve seat, thus causing relatively large noise;

[0006] 2. During the normal working cycle of the shock absorber and during the assembly process of the shock absorber, it is inevitable that there is no air at all inside the working cylinder and the accumulator cylinder assembly. The presence of air in the oil will enter the working cylinder during the operation of the shock absorber. The process of having air bubbles in the cylinder will affect the damping characteristics of the shock absorber and even cause the problem of air explosion.

[0007] 3. During the process of the oil reciprocatingly flowing in the working cylinder and the accumulator cylinder, due to the different positions of the oil, there will be a problem of uneven distribution of the oil temperature.

[0008] Therefore, the present invention provides a compression valve assembly for a silent shock absorber of a rail vehicle to solve the above problems. Summary of the Invention

[0009] In view of the above situation, in order to overcome the deficiencies of the prior art, the present invention provides a compression valve assembly for a silent shock absorber of a rail vehicle, which effectively solves the problem of significantly reducing the force of the compensation valve plate hitting the compensation valve oil line during the rebound process, thereby reducing the rebound hitting noise and achieving the purpose of noise reduction.

[0010] The present invention includes a working cylinder assembly and an accumulator cylinder assembly. A compression valve seat is disposed at the lower end of the working cylinder. A compression valve screw is coaxially connected to the lower end of the compression valve seat. A compensation valve limiter is connected to the upper end of the compression valve seat. A compensation valve plate is connected between the compression valve seat and the compensation valve limiter. An O-ring seal is connected between the compensation valve limiter and the compensation valve plate. A compression valve sleeve is sleeved around the compression valve screw. A compression valve spring seat is connected to the outside of the compression valve seat. A compression valve spring is connected between the compression valve spring seat and the compression valve screw. A compression valve throttle valve plate is disposed between the compression valve spring seat and the compression valve seat. A compensation valve plate is connected between the compression valve seat and the compensation valve limiter.

[0011] A compensation valve flow passage is opened on the compression valve seat. Support members are fixedly connected beside the compensation valve flow passage. The support of the compensation valve plate is realized through the support members. A compensation valve oil line is fixedly connected to the upper end of the compression valve seat.

[0012] Preferably, an interaction passage is opened on the compression valve seat. The communication between the inside of the compression valve seat and the accumulator cylinder assembly is realized through the interaction passage. An oil pipe is fixedly connected inside the interaction passage. A plurality of liquid injection channels are opened in the oil pipe. First-stage one-way pressure valves are fixedly connected to the inner ends of the liquid injection channels close to the accumulator cylinder.

[0013] A plurality of liquid return channels are provided in the oil pipe. The liquid return channels and the liquid injection channels are staggered. A secondary one-way pressure valve is fixedly connected to one side of each liquid return channel close to the working cylinder. Stirring paddles are rotatably connected inside both the liquid injection channels and the liquid return channels, and the installation directions of the stirring paddles in the liquid injection channels and the liquid return channels are opposite.

[0014] Preferably, the compression valve seat is made of powder metallurgy material;

[0015] A slope limiting surface is provided at the lower end of the compensating valve limiter.

[0016] Preferably, the height of the support member is higher than the height of the compensating valve oil line, and the support member adopts an annular ring support structure.

[0017] Preferably, an elastic ring piece is fixedly connected to the upper end surface of the compensating valve oil line, and the compensating valve piece is in contact connection with the elastic ring piece.

[0018] The present invention improves the compression valve assembly of the existing oil pressure shock absorber and has the following beneficial effects:

[0019] 1. By changing the design of the compensating valve end of the compression valve assembly, changing the original up-and-down floating compensating valve structure to an edge warping type, the force of the compensating valve piece hitting the compensating valve oil line during the rebound process can be significantly reduced, thereby reducing the rebound hitting noise and achieving the purpose of noise reduction;

[0020] 2. By adding a plurality of support cylinders on the surface of the compression valve seat, the height of which is slightly lower than the compensating valve oil line surface, during the compression stroke of the shock absorber, the compensating valve piece can be prevented from being excessively concave and bent and deformed, and the service life of the compensating valve piece can be significantly improved, thereby improving the use and maintenance cycle of the entire shock absorber;

[0021] 3. By arranging structures such as an oil pipe, a liquid injection channel, a liquid return channel, a primary one-way pressure valve, a secondary one-way pressure valve, and a stirring paddle, the stirring and splitting of the oil liquid during the flow process are realized, so that the temperature distribution is more uniform. At the same time, the division of the bubbles in the oil liquid is also realized, making the bubbles smaller, and avoiding the problem that large bubbles exist in the working cylinder, affecting the damping effect and increasing the working noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of the oil pressure shock absorber body of the present invention.

[0023] Figure 2 It is a schematic cross-sectional view of the oil pressure shock absorber of the present invention.

[0024] Figure 3 For the present invention Figure 2 The partial enlarged schematic view at A in.

[0025] Figure 4 Schematic diagram of the compression valve seat and its connecting parts of the present invention.

[0026] Figure 5 Schematic cross-sectional view of the compression valve assembly of the present invention.

[0027] Figure 6 Schematic perspective view of the compression valve seat of the present invention.

[0028] Figure 7 Schematic cross-sectional view of the compression valve seat of the present invention.

[0029] Figure 8 Schematic diagram of the oil pipe and its connecting parts of the present invention.

[0030] Figure 9 Schematic cross-sectional view of the oil pipe and its internal structure of the present invention.

[0031] Reference numerals: 1, working cylinder assembly; 2, oil storage cylinder assembly; 3, compression valve seat; 4, compression valve screw; 5, compensation valve limiter; 6, O-ring seal; 7, compensation valve plate; 8, compression valve sleeve; 9, compression valve spring seat; 10, compression valve throttle valve plate; 11, compensation valve flow passage; 12, support member; 13, compensation valve oil line; 14, interaction passage; 15, oil pipe; 16, liquid injection passage; 17, first-stage one-way pressure valve; 18, liquid return passage; 19, second-stage one-way pressure valve; 20, stirring paddle; 21, slope limiting surface; 22, compression valve flow passage. Detailed Description of the Invention

[0032] The foregoing and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of the embodiments with reference to the attached drawings. The structural contents mentioned in the following embodiments are all referenced to the drawings of the specification. Figures 1 to 9 The following will describe the exemplary embodiments of the present invention with reference to the drawings.

[0033] The following will describe each exemplary embodiment of the present invention with reference to the drawings.

[0034] The present invention includes a working cylinder assembly 1 and an oil storage cylinder assembly 2. A compression valve seat 3 is disposed at the lower end of the working cylinder. The compression valve seat 3 provides a support basis for subsequent structures and at the same time ensures that oil can also pass through the compression valve seat 3 to realize the reciprocating flow of the oil fluid inside the working cylinder assembly 1 and the oil storage cylinder assembly 2. A compression valve screw 4 is coaxially connected to the lower end of the compression valve seat 3. A compensation valve limiter 5 is connected to the upper end of the compression valve seat 3. The compression valve stem is fixedly connected to the compensation valve limiter 5. A compensation valve disc 7 is connected between the compression valve seat 3 and the compensation valve limiter 5. An O-ring seal 6 is connected between the compensation valve limiter 5 and the compensation valve disc 7. The O-ring seal 6 is used to seal between the compensation valve limiter 5 and the compensation valve disc 7 to avoid liquid leakage. A compression valve sleeve 8 is sleeved around the compression valve screw 4. A compression valve spring seat 9 is connected to the outside of the compression valve sleeve 8. A compression valve spring is connected between the compression valve spring seat 9 and the compression valve screw 4. Under the action of the compression valve spring, the compression valve spring seat 9 slides up and down along the compression valve sleeve 8. A compression valve throttle disc 10 is disposed between the compression valve spring seat 9 and the compression valve seat 3. The compression valve throttle disc 10 is sealed by the fitting of the compression valve throttle disc 10 and the compression valve spring seat 9. At the same time, when the hydraulic shock absorber is compressed, the oil fluid passes through the compression valve seat 3 and enters the compression valve throttle disc 10. The oil fluid passing through the compression valve throttle disc 10 squeezes the compression valve spring seat 9, causing the compression valve spring seat 9 to slide downward, thereby opening the compression valve throttle disc 10, and then enabling the oil fluid to enter the inside of the oil storage cylinder assembly 2 through the compression valve seat 3 and the compression valve throttle disc 10. A compensation valve disc 7 is connected between the compression valve seat 3 and the compensation valve limiter 5. A compensation valve flow passage 11 is provided on the compression valve seat 3. The opening and closing of the pressure relief hole on the compression valve seat 3 are controlled by the compensation valve disc 7. When the hydraulic shock absorber is compressed, the compensation valve disc 7 seals the compensation valve flow passage 11 under the action of the oil pressure. At the same time, when the hydraulic shock absorber is stretched, the oil fluid in the oil storage cylinder assembly 2 flows upward, forcing the outer edge part of the compensation valve disc 7 to warp and deform. The oil fluid flowing into the compensation valve flow passage 11 can pass through the gap between the compensation valve disc 7 and the compensation valve oil line 13, and then the oil fluid passes through the compression valve assembly and enters the inside of the oil storage cylinder assembly 2. Support members 12 are fixedly connected beside the compensation valve flow passage 11. The support members 12 are used to support the compensation valve disc 7. A compensation valve oil line 13 is fixedly connected to the upper end of the compression valve seat 3. During the stretching process of the compensation valve disc 7, when the edge slightly warps, the pressure relief and oil replenishment process will immediately occur.The actual edge warping height is very small. At the same time, since the width of the compensation valve oil line 13 on the compression valve seat 3 is relatively narrow, that is, the contact area is relatively small, the energy impact of slapping the oil line when opening and closing the compensation valve piece 7 is relatively small, and the resulting noise can be significantly reduced.

[0035] In the specific implementation of this embodiment, when the oil pressure shock absorber is in the tensile stroke, the compensation valve piece 7 is in the open state at this time, and the oil fluid flows into the compression valve assembly. At this time, the pressure of part of the oil fluid forces the outer edge part of the compensation valve piece 7 to warp and deform. The oil fluid flowing into the compensation valve flow passage 11 can pass through the gap between the compensation valve piece 7 and the compensation valve oil line 13, and flow into the lower cavity of the working cylinder assembly 1 through the compensation valve assembly, achieving the purpose of compensating the oil fluid.

[0036] When the oil pressure shock absorber is in the compression stroke, the compensation valve piece 7 is in the closed state and does not move at this time. The oil fluid in the lower cavity of the working cylinder assembly 1 flows into the compression valve assembly through the compression valve flow passage 22. Under the low-speed compression condition, this part of the oil fluid flows into the compression valve assembly through the compression valve throttle valve piece 10 and flows back into the oil storage cylinder assembly 2 through the compression valve seat 3. At this time, the low-speed damping force is generated.

[0037] Under the high-speed compression condition, the oil fluid in the lower cavity of the working cylinder assembly 1 passes through the compression valve flow passage 22, and the pressure forces the compression valve spring to deform and compress. At the same time, the compression valve throttle valve piece 10 and the compression valve spring seat 9 slide downward outside the compression valve sleeve 8 and flow back into the oil storage cylinder assembly 2 through the compression valve seat 3, then the high-speed damping force is generated.

[0038] At the same time, during the compression process, due to the internal pressure acting on the lower part of the working cylinder assembly 1, a relatively large pressure will be generated on the surface of the compensation valve piece 7. The multiple support columns on the surface of the compression valve seat 3 can provide better support for the compensation valve piece 7, prevent the compensation valve piece 7 from deforming excessively, and can significantly improve the service life of the compensation valve piece 7, thereby increasing the working life of the entire oil pressure shock absorber.

[0039] During the operation of the hydraulic shock absorber, the oil temperature at different positions is different, and at the same time, it is inevitable that there will be gas problems in the oil, which will affect the service life of the equipment. At the same time, the existence of bubbles will affect the damping effect. Therefore, this embodiment provides a structure for stirring and mixing the oil and dividing the comparison gas to avoid the appearance of large bubbles. Specifically, an interaction channel 14 is opened on the compression valve seat 3, and the inside of the compression valve seat 3 and the oil storage cylinder are connected through the interaction channel 14. An oil pipe 15 is fixedly connected inside the interaction channel 14. A plurality of liquid injection channels 16 are opened in the oil pipe 15. One-way pressure valves of the first stage 17 are fixedly connected to the inner sides of the liquid injection channels 16 close to the oil storage cylinder assembly 2 end, so that the oil can only enter the inside of the working cylinder assembly 1 from the oil storage cylinder assembly 2 end, realizing the one-way flow of the oil.

[0040] A plurality of liquid return channels 18 are opened in the oil pipe 15. The liquid return channels 18 and the liquid injection channels 16 are distributed in a staggered manner. One-way pressure valves of the second stage 19 are fixedly connected to the inner sides of the liquid return channels 18 close to the working cylinder assembly 1 side, so that the oil can only enter the inside of the oil storage cylinder assembly 2 from the working cylinder assembly 1 end, realizing the one-way flow of the oil. Stirring paddles 20 are rotatably connected inside the liquid injection channels 16 and the liquid return channels 18. The installation directions of the stirring paddles 20 in the liquid injection channels 16 and the liquid return channels 18 are opposite. When the oil flows in the liquid injection channels 16 and the liquid return channels 18, the oil will drive the stirring paddles 20 to rotate under the action of the oil pressure, thereby realizing the stirring of the oil, making the oil temperature distribution uniform, and at the same time realizing the pre-crushing of the bubbles in the oil, dividing the bubbles into a smaller state, and avoiding the appearance of large bubbles in the working cylinder assembly 1, which affects the damping effect of the oil shock absorber.

[0041] The compression valve seat 3 is made of powder metallurgy material, which is also called porous sintered material. It is made by forming and sintering spherical or irregularly shaped metal or alloy powders. The internal pore channels of the material crisscross and communicate with each other. Generally, it has a volume porosity of 30% - 60% and a pore diameter of 1 - 100 microns. Therefore, oil molecules can fully penetrate into its interior. During the rebound process of the compensation valve plate 7, the rebound slapping force can be reduced, achieving the purpose of noise reduction.

[0042] A slope limiting surface 21 is opened at the lower end of the compensation valve limiter 5, which is convenient for the oil in the working cylinder assembly 1 to pass through the compensation valve limiter 5 and enter the inside of the compensation valve limiter 5, and then act on the compensation valve plate 7. At the same time, during the stretching process of the hydraulic shock absorber, the edge of the compensation valve plate 7 warps and deforms, and the slope limiting surface 21 also provides a deformation space for the deformation of the compensation valve plate 7 to ensure the smooth passage of the oil.

[0043] The height of the support member 12 is higher than that of the compensation valve oil line 13. The support member 12 adopts an annular ring support structure, which can prevent the compensation valve plate 7 from being excessively concave and bent during the compression stroke of the shock absorber, significantly improving the service life of the compensation valve plate 7, and thus extending the service and maintenance cycle of the entire hydraulic shock absorber.

[0044] In order to further reduce the slapping noise during the contact process between the compensation valve plate 7 and the compensation valve oil line 13, an elastic ring plate is fixedly connected to the upper end surface of the compensation valve oil line 13. The compensation valve plate 7 is in contact connection with the elastic ring plate. The elastic ring plate buffers the slapping between the compensation valve plate 7 and the compensation valve oil line 13, and at the same time enhances the sealing performance between the compensation valve plate 7 and the compensation valve oil line 13 during the contact process.

[0045] When the present invention is in specific use, during the stretching process of the hydraulic shock absorber, the oil in the oil storage cylinder assembly 2 flows into the compression valve assembly through the interaction channel 14 between the compression valve assembly and the oil storage cylinder assembly 2. The pressure of this part of the oil forces the outer edge part of the compensation valve plate 7 to warp and deform. The oil flowing into the compensation valve flow channel 11 can pass through the gap between the compensation valve plate 7 and the compensation valve oil line 13, and then flow into the lower cavity of the working cylinder assembly 1 through the interaction channel 14 between the compensation valve on the compensation valve limiter 5 and the working cylinder, achieving the purpose of compensating the oil.

[0046] During the stretching process, as soon as the edge of the compensation valve plate 7 slightly warps, the pressure relief and oil replenishment process will occur immediately. The actual warping height of the edge is very small. At the same time, due to the narrow width of the compensation valve oil line 13 on the compression valve seat 3 (i.e., the contact area is small), the energy impact of slapping the oil line when opening and closing the compensation valve plate 7 is small, and the resulting noise can be significantly reduced.

[0047] During the compression process of the hydraulic shock absorber, the oil in the lower cavity of the working cylinder assembly 1 flows into the compression valve assembly through the compression valve flow channel 22. Under the low-speed compression condition, this part of the oil flows into the compression valve assembly through the compression valve throttle valve plate 10 and flows back into the oil storage cylinder assembly through the interaction channel 14 between the compression valve seat 3 and the oil storage cylinder assembly 2, and the low-speed damping force is generated at this time.

[0048] Under the high-speed compression condition, the oil in the lower cavity of the working cylinder assembly 1 passes through the compression valve flow channel 22. The pressure forces the compression valve spring to deform and compress. The compression valve throttle valve plate 10, the compensation valve plate 7, and the compression valve spring seat 9 slide downward outside the compression valve sleeve 8 and flow back into the oil storage cylinder assembly 2 through the interaction channel 14 between the compression valve assembly and the oil storage cylinder assembly 2, and the high-speed damping force is generated.

[0049] The above embodiments are only preferred embodiments of the present invention, and cannot be used to limit the scope of protection of the present invention. Any non-substantive changes and substitutions made by those skilled in the art based on the present invention fall within the scope of protection required by the present invention.

Claims

1. A compression valve assembly for a rail vehicle silent shock absorber, comprising a working cylinder assembly (1) and an oil storage cylinder assembly (2), characterized in that: The lower end of the working cylinder assembly (1) is provided with a compression valve seat (3), the lower end of the compression valve seat (3) is coaxially connected to a compression valve screw (4), the upper end of the compression valve seat (3) is connected to a compensation valve limiter (5), a compensation valve plate (7) is connected between the compression valve seat (3) and the compensation valve limiter (5), an O-ring (6) is connected between the compensation valve limiter (5) and the compensation valve plate (7), a compression valve sleeve (8) is provided on the outer sleeve of the compression valve screw (4), a compression valve spring seat (9) is connected to the outside of the compression valve seat (3), a compression valve spring is connected between the compression valve spring seat (9) and the compression valve screw (4), and a compression valve throttle plate (10) is provided between the compression valve spring seat (9) and the compression valve seat (3); The compression valve seat (3) is provided with a compensation valve flow channel (11), and a support member (12) is fixedly connected to the side of the compensation valve flow channel (11). The compensation valve plate (7) is supported by the support member (12), and the upper end of the compression valve seat (3) is fixedly connected to a compensation valve oil line (13); The compression valve seat (3) is provided with an interactive channel (14), and the interior of the compression valve seat (3) and the oil storage cylinder assembly (2) are connected via the interactive channel (14). An oil pipe (15) is fixedly connected to the interior of the interactive channel (14), and a plurality of injection channels (16) are provided in the oil pipe (15). The interior of the injection channel (16) close to one end of the oil storage cylinder assembly (2) is fixedly connected with a primary one-way pressure valve (17); A plurality of return channels (18) are provided in the oil pipe (15). The return channels (18) and the injection channels (16) are arranged in an alternating manner. A secondary one-way pressure valve (19) is fixedly connected to the return channels (18) on one side close to the working cylinder assembly (1). A stirring blade (20) is rotatably connected inside the injection channels (16) and the return channels (18). The stirring blades (20) in the injection channels (16) and the return channels (18) are installed in opposite directions.

2. The compression valve assembly of a rail vehicle silent shock absorber according to claim 1, characterized in that: The compression valve seat (3) is made of powder metallurgy material; The compensating valve limiter (5) is provided with an inclined limit surface (21) at the lower end.

3. The compression valve assembly of a rail vehicle silent shock absorber according to claim 1, characterized in that: The height of the support member (12) is higher than the height of the compensation valve oil line (13), and the support member (12) adopts an annular ring support structure.

4. The compression valve assembly of a rail vehicle silent shock absorber according to claim 1, characterized in that: An elastic ring sheet is fixedly connected to the upper end surface of the compensation valve oil line (13), and the compensation valve sheet (7) is in contact with and connected to the elastic ring sheet.

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