Damping provision and fluid system

Abstract

This invention provides a damping supply device and a fluid system, belonging to the field of fluid transmission control technology. In this device, cavity A and cavity B are formed between the valve sleeve and the valve core. A valve sleeve limiting block is provided near cavity A to restrict the leftward movement of the valve core. The oil hole pipeline on the A side of the valve sleeve connects cavity A of the damping supply device with the cross-shaped oil hole on the valve core, and the oil hole pipeline on the B side connects cavity B of the damping supply device with the cross-shaped oil hole on the valve core. The oil hole pipelines on the A and B sides of the valve sleeve are connected through the same cross-shaped oil hole on the valve core. The valve core limiting block limits the valve core when the flexible hinge deformation is at its maximum after the valve core is compressed. When there is a pressure difference in the fluid between cavity A and cavity B, force transmission and balance are achieved. When the pressure difference at both ends of the valve core is balanced with the compressive force of the valve core's flexible hinge, the cross-shaped oil holes of different diameters distributed on the valve core automatically provide matching damping force to the fluid system as the valve core moves.

Description

Technical Field

[0001] This invention belongs to the field of fluid transmission control technology, and particularly relates to a damping supply device and a fluid system. Background Technology

[0002] In the field of fluid control, damping devices with elongated orifices are frequently used to provide damping force during fluid flow. However, these elongated orifices are of a single specification and can only provide a damping force with a single characteristic to the fluid in the system. They cannot dynamically adapt to changes in fluid pressure differentials, thus failing to provide steady-state control characteristics to the fluid system.

[0003] Therefore, there is a need to provide a new damping device that can dynamically provide matching damping characteristics based on changes in the pressure difference of the fluid system. Summary of the Invention

[0004] To address the problem that existing damping devices can only provide a single type of damping force to the fluid in a fluid system, and cannot dynamically adapt to the fluid system's damping requirements when the fluid pressure difference changes, thus failing to provide steady-state control characteristics, this invention provides a damping device and fluid system. When the pressure difference across the valve core is balanced with the compressive force of the valve core's flexible hinge, cross-shaped oil holes of different diameters distributed on the valve core automatically provide a matching damping force to the fluid system as the valve core moves. The technical solution is as follows:

[0005] In a first aspect, a damping supply device is provided, comprising: a valve sleeve 1, a valve core 2, and an end cap 3; wherein the valve sleeve 1 is provided with an oil hole pipe on side A and an oil hole pipe on side B, the valve core 2 is located inside the valve sleeve 1, and the valve sleeve 1 and the valve core 2 are coaxial; a cavity A and a cavity B are formed between the valve sleeve 1 and the valve core 2; a valve sleeve limiting block is provided near the cavity A of the valve sleeve 1 to restrict the leftward movement of the valve core 2;

[0006] The valve core 2 has a symmetrical structure. From the center of the valve core 2 to both ends, there are cross-shaped oil holes with increasing diameter, a flexible hinge, a valve core limiting block, and a pressure-bearing surface. The oil hole pipeline on the A side of the valve sleeve 1 connects the A cavity of the damping providing device with the cross-shaped oil hole on the valve core 2, and the oil hole pipeline on the B side connects the B cavity of the damping providing device with the cross-shaped oil hole on the valve core 2. The oil hole pipelines on the A side and the B side of the valve sleeve 1 are connected through the same cross-shaped oil hole on the valve core 2. The flexible hinge provides force balance between the initial state of the valve core 2 and the fluid flow process in the pipeline. The valve core limiting block is used to limit the valve core 2 when the flexible hinge is at its maximum deformation after the valve core 2 is compressed. When there is a pressure difference between the fluid in the A cavity and the B cavity, the pressure-bearing surface realizes force transmission and balance.

[0007] End cap 3 is located at the right end of valve sleeve 1. End cap 3 is provided with end cap limiting block on the side of valve sleeve 1. End cap limiting block is used to limit the position of valve core 2 in cavity B. By squeezing the pressure surface of valve core 2 in cavity B, the flexible hinge of valve core 2 is deformed to form the initial balance force of valve core 2.

[0008] Among them, the oil hole pipeline on the valve sleeve 1 that communicates with the cross oil hole of the valve core 2 is provided with a 90° circumferential groove, so that when the valve core 2 rotates, the cross oil hole on the valve core 2 is always in communication with the oil hole pipeline of the valve sleeve 1.

[0009] The length of the valve core limiting block is determined by the yield stress of the flexible hinge and the distance between the outermost cross oil hole and the middle cross oil hole on the valve core 2.

[0010] Among them, there are three flexible hinges on each side of the multiple cross oil holes of the valve core 2, and the three flexible hinges are evenly distributed along the circumference of the valve core 2.

[0011] The flexible hinge is made of spring steel.

[0012] Among them, valve sleeve 1 and valve sleeve limiting block are integrated, valve core 2 and valve core limiting block are integrated, and end cover 3 and end cover limiting block are integrated.

[0013] Among them, the oil hole pipeline on side A is connected to the first load oil port, and the oil hole pipeline on side B is connected to the second load oil port. The first load and the second load are loads in the fluid system.

[0014] In a second aspect, a fluid system is provided, including the damping providing device described in any of the first aspects.

[0015] Among them, the fluid system is the hydraulic system of engineering machinery, the hydraulic system of front wheel turning, the hydraulic system of steering surface control, or the fluid transmission and control system.

[0016] The beneficial effects of this invention are at least as follows:

[0017] The damping device and fluid system provided by this invention utilize the force balance between the pressure difference across the valve core and the compressive force of the valve core's flexible hinge. This allows cross-shaped oil holes of different diameters distributed on the valve core to change with the valve core's displacement, communicating with the two fluid chambers, thereby providing the fluid system with damping characteristics of varying degrees. The cross-shaped oil holes of different diameters can provide matching damping forces to the fluid system based on the dynamic force balance of the valve core. The application of the flexible hinge achieves initial force balance of the valve core, determines the initial damping characteristics of the system, and provides force balance with the pressure difference during dynamic damping adaptation and adjustment. Attached Figure Description

[0018] Figure 1 A schematic diagram of the damping supply device provided in an embodiment of the present invention;

[0019] Figure 2 A schematic diagram illustrating the operation of the force balance-based damping device adjusted to its limit position according to an embodiment of the present invention;

[0020] Among them, 1-valve sleeve; 2-valve core; 3-end cap. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0022] Please see Figure 1 This is a schematic diagram of a damping providing device according to an embodiment of the present invention, including: a valve sleeve 1, a valve core 2, and an end cap 3; wherein, the valve sleeve 1 is provided with an oil hole pipe on side A and an oil hole pipe on side B, the valve core 2 is located inside the valve sleeve 1, and the valve sleeve 1 and the valve core 2 are coaxial; a cavity A and a cavity B are formed between the valve sleeve 1 and the valve core 2; a valve sleeve limiting block 11 is provided near the cavity A of the valve sleeve 1 to restrict the leftward movement of the valve core 2, such as... Figure 2 As shown;

[0023] like Figure 2 As shown, the valve core 2 has a symmetrical structure. From the center of the valve core 2 to both ends, there are cross-shaped oil holes 21 with increased diameter, flexible hinges 22, valve core limiting blocks 23, and pressure-bearing surfaces 24.

[0024] The valve core 2 is provided with multiple cross oil holes 21 of different diameters along the axial direction, and the smallest diameter cross oil hole 21 is located in the middle position, while the diameters of the cross oil holes 21 on both sides of the smallest diameter cross oil hole 21 gradually increase.

[0025] Please see Figure 1 The valve core 2 has cross-shaped oil holes 21 with different diameters from a to e distributed in part. The diameter of hole a is the smallest and is located in the middle. The diameter of hole b is equal to the diameter of hole d and is greater than the diameter of hole a. The diameter of hole c is equal to the diameter of hole e and is greater than the diameter of hole b.

[0026] For example, the cross-shaped oil holes 21 with increasing diameters distributed sequentially from the center to both ends of the valve core 2 include: cross-shaped oil holes 21 with a diameter of 1-2 mm, cross-shaped oil holes 21 with a diameter of 3-4 mm, and cross-shaped oil holes 21 with a diameter of 5-6 mm, that is, hole a has a diameter of 1-2 mm, hole b has a diameter of 3-4 mm, and hole c has a diameter of 5-6 mm.

[0027] It should be noted that, in this embodiment of the invention, the valve core 2 is not limited to having only five types of cross-shaped oil holes 21.

[0028] The oil hole pipeline on the A side of the valve sleeve 1 connects the A cavity of the damping supply device with the cross oil hole 21 on the valve core 2, and the oil hole pipeline on the B side connects the B cavity of the damping supply device with the cross oil hole 21 on the valve core 2. The oil hole pipeline on the A side and the oil hole pipeline on the B side of the valve sleeve 1 are connected through the same cross oil hole 21 on the valve core 2.

[0029] See Figure 2 The flexible hinge 22 provides force balance between the initial state of the valve core 2 and the fluid flow process in the pipeline. The flexible hinge 22 has compressible and recoverable mechanical properties. The length of the valve core limiting block 23 is determined by the yield stress of the flexible hinge 22 and the distance between the outermost cross oil hole 21 and the middle cross oil hole 21 on the valve core 2. The length of the valve core limiting block 23 should restrict the compression movement of the flexible hinge 22 within the yield stress range. The length of the valve core limiting block 23 should also restrict the valve core 2 to its working compression to the limit position, so that the outermost cross oil hole 21 is exactly at the position connecting cavity A and cavity B.

[0030] See Figure 2 The valve core limiting block 23 is used to limit the valve core 2 when the flexible hinge 22 is deformed to its maximum after the valve core 2 is compressed; the pressure surface 24 realizes force transmission and balance when there is a pressure difference between the fluid in cavity A and cavity B.

[0031] See Figure 2 The end cap 3 is located at the right end of the valve sleeve 1. The end cap 3 is provided with an end cap limiting block 31 on the side of the end cap 3 near the valve sleeve 1. The end cap limiting block 31 is used to limit the position of the valve core 2 in the B cavity. By squeezing the pressure surface 24 of the valve core 2 in the B cavity, the flexible hinge 22 of the valve core 2 is deformed, forming the initial balance force of the valve core 2.

[0032] For example, a 90° circumferential groove is provided at the oil hole pipeline on the valve sleeve 1 that communicates with the cross oil hole 21 of the valve core 2, so that when the valve core 2 rotates, the cross oil hole 21 on the valve core 2 is always in communication with the oil hole pipeline of the valve sleeve 1.

[0033] For example, the valve core 2 has three flexible hinges 22 on each side of the multiple cross-shaped oil holes 21, and the three flexible hinges 22 are evenly distributed along the circumference of the valve core 2 to improve stability and prevent mutual interference during movement. For example, the flexible hinges 22 can be made of spring steel.

[0034] In one possible implementation, the valve sleeve 1 and the valve sleeve limiting block 11 are integrated, the valve core 2 and the valve core limiting block 23 are integrated, and the end cap 3 and the end cap limiting block 31 are integrated. This facilitates the reduction of processing costs and increases the stability of the damping output of the fluid system.

[0035] Among them, the oil port on side A is connected to the first load oil port, and the oil port on side B is connected to the second load oil port. The first load and the second load are loads in the fluid system.

[0036] Figure 2 This is a schematic diagram of the working state of a damping device provided in an embodiment of the present invention. The oil port on side A is connected to the first load port, and the oil port on side B is connected to the second load port. When the pressure at the second load port is greater than the pressure at the first load port, and the pressure in cavity B is greater than the pressure in cavity A, the fluid communicating with cavity B flows towards cavity A. Initially, the a-hole of valve core 2 provides a damping effect for the fluid system. When the pressure difference between the pressure-bearing surface 24 of valve core 2 acting on cavity B and the pressure-bearing surface 24 of valve core 2 acting on cavity A is greater than the initial pressure value of the flexible hinge 22 of valve core 2, the flexible hinge 22 of valve core 2 compresses and deforms, the compressive force of the flexible hinge 22 increases, and the valve core moves towards cavity A. When valve core 2 moves to the d-hole connecting cavities A and B, the damping effect provided by this device decreases, acting on cavity B. The pressure difference between the pressure-bearing surface 24 of valve core 2 in cavity A and the pressure-bearing surface 24 of valve core 2 in cavity A decreases. If this pressure difference balances the compressive force of the flexible hinge 22, the d-hole will continue to provide damping force to the fluid system. When the pressure difference between the pressure-bearing surface 24 of valve core 2 in cavity B and the pressure-bearing surface 24 of valve core 2 in cavity A is still greater than the compressive force of the flexible hinge 22, the flexible hinge 22 of valve core 2 continues to be compressed, the compressive force of the flexible hinge 22 continues to increase, and valve core 2 continues to move towards the position of cavity A. When valve core 2 moves to the e-hole connecting cavities A and B, the damping effect provided by this device is minimal. Figure 2 As shown, due to the limiting effect of the valve core limiting block 23 of valve core 2, even if the pressure difference between chambers A and B continues to increase, valve core 2 will no longer move.

[0037] Since valve core 2 has a symmetrical structure, when the pressure in chamber A is greater than the pressure in chamber B, the process of adjusting the cross-shaped oil port 21 of different diameters to provide a damping effect to the fluid system is also applicable.

[0038] When the valve core 2 rotates along the axis in the valve sleeve 1, the cross oil hole 21 of the valve core 2 and the 90° circumferential groove in the valve sleeve 1 can always ensure the communication of fluid between chambers A and B.

[0039] Another embodiment of the present invention provides a fluid system including the damping providing device provided in the embodiments of the present invention.

[0040] For example, in embodiments of the present invention, the fluid system may be a hydraulic system for engineering machinery, a front wheel steering hydraulic system, a steering surface control hydraulic system, or a fluid transmission and control system, etc.

[0041] The above description merely illustrates embodiments of the present invention and is quite specific and detailed; however, it should not be construed as limiting the scope of the patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Furthermore, any parts of the present invention not described in detail are conventional techniques.

Claims

1. A damping supply device, characterized in that, include: Valve sleeve (1), valve core (2), and end cap (3); wherein, the valve sleeve (1) is provided with an oil hole pipeline on side A and an oil hole pipeline on side B, the valve core (2) is located inside the valve sleeve (1), and the valve sleeve (1) and the valve core (2) are coaxial; an A cavity and a B cavity are formed between the valve sleeve (1) and the valve core (2); a valve sleeve limiting block is provided near the A cavity of the valve sleeve (1) to restrict the leftward movement of the valve core (2); The valve core (2) has a symmetrical structure. From the center of the valve core (2) to both ends, there are cross-shaped oil holes with increasing diameter, flexible hinges, valve core limiting blocks, and pressure-bearing surfaces. The oil hole pipeline on the A side of the valve sleeve (1) connects the A cavity of the damping device with the cross-shaped oil hole on the valve core (2), and the oil hole pipeline on the B side connects the B cavity of the damping device with the cross-shaped oil hole on the valve core (2). The oil hole pipelines on the A side and the B side of the valve sleeve (1) are connected through the same cross-shaped oil hole on the valve core (2). The flexible hinge provides force balance between the initial state of the valve core (2) and the fluid flow process in the pipeline. The valve core limiting block is used to limit the valve core (2) when the flexible hinge is deformed to its maximum after the valve core (2) is compressed. When there is a pressure difference between the fluid in the A cavity and the B cavity, the pressure-bearing surface realizes force transmission and balance. The end cap (3) is located at the right end of the valve sleeve (1). The end cap (3) is provided with an end cap limiting block on the side of the valve sleeve (1). The end cap limiting block is used to limit the position of the valve core (2) in the B cavity. By squeezing the pressure surface of the valve core (2) in the B cavity, the flexible hinge of the valve core (2) is deformed, forming the initial balance force of the valve core (2). A 90° circumferential groove is provided at the oil hole pipeline on the valve sleeve (1) that communicates with the cross oil hole of the valve core (2), so that when the valve core (2) rotates, the cross oil hole on the valve core (2) is always in communication with the oil hole pipeline of the valve sleeve (1).

2. The damping supply device according to claim 1, characterized in that, The length of the valve core limiting block is determined by the yield stress of the flexible hinge and the distance between the outermost cross oil hole and the middle cross oil hole on the valve core (2).

3. The damping providing device according to claim 1, characterized in that, The valve core (2) has three flexible hinges on each side of the multiple cross oil holes, and the three flexible hinges are evenly distributed along the circumference of the valve core (2).

4. The damping providing device according to claim 1, characterized in that, The flexible hinge is made of spring steel.

5. The damping supply device according to claim 1, characterized in that, The valve sleeve (1) and the valve sleeve limiting block are integrated, the valve core (2) and the valve core limiting block are integrated, and the end cover (3) and the end cover limiting block are integrated.

6. The damping providing device according to claim 1, characterized in that, The oil port on side A is connected to the first load oil port, and the oil port on side B is connected to the second load oil port. The first load and the second load are loads in the fluid system.

7. A fluid system, characterized in that, Includes the damping supply device as described in any one of claims 1 to 6.

8. The fluid system according to claim 7, characterized in that, The fluid system is either a front-wheel steering hydraulic system or a steering surface control hydraulic system.

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