Damper with Tesla valve

Abstract

The damper with the Tesla valve comprises a cylinder barrel, the cylinder barrel is provided with an upper end cover and a lower end cover, a piston and a piston rod are movably arranged in the cylinder barrel, the piston is fixedly connected with the piston rod, an inner cavity of the cylinder barrel is divided into a rod cavity and a rodless cavity by the piston, a damping hole is formed in the piston, and the Tesla valve is connected outside the cylinder barrel in series. The Tesla valve is communicated with the upper end cover through an upper pipeline and communicated with the lower end cover through a lower pipeline, a first fluid channel is formed in the upper end cover, a second fluid channel is formed in the lower end cover, a first inlet is formed in the end, close to the upper pipeline, of the Tesla valve, and a second inlet is formed in the end, close to the lower pipeline, of the Tesla valve. The direction from the first inlet to the second inlet is the fluid low-resistance direction, the direction from the second inlet to the first inlet is the fluid high-resistance direction, by reasonably setting the size parameters of the Tesla valve, the tension and pressure of the damper can be consistent, the Tesla valve further has the compensation and pressure stabilization effects, and the system pressure is prevented from being too high.

Description

Technical Field

[0001] The utility model relates to the technical field of dampers, in particular to a damper with a Tesla valve. Background Art

[0002] As a key mechanical component, dampers are widely used in various engineering fields. In engineering support structures, dampers play a vital role in maintaining the relative balance of the support and avoiding or reducing the degree of damage in extreme weather (such as earthquakes or strong winds), thereby extending the service life of the project.

[0003] The damper is mainly composed of a piston, a piston rod, a damping medium, etc. The characteristic of the damping medium is viscosity, that is, it will undergo corresponding deformation when subjected to external force. However, during use, the damper is prone to tension and compression inconsistency. This is because when the piston rod drives the piston to move during the in and out process, the damping medium in the rodless chamber will produce volume compression or the so-called "cavitation" phenomenon; specifically, when the piston rod is subjected to thrust, more of its volume will enter the cylinder body, resulting in compression of the damping medium; and when the piston rod is subjected to tension, part of its volume will leave the cylinder body, at which time "cavitation" or a "vacuum" state may occur in the damping medium. These factors lead to tension and compression inconsistency in the damper, and when the internal components of the damper are worn or fail, the damping performance decreases, and the damper may not be able to effectively control the system pressure, causing it to exceed the specified value, or when the damper is used under extreme conditions such as high temperature and high pressure, the system pressure may also exceed the specified value, affecting the stability and safety of the damper, so it is necessary to improve it. Utility Model Content

[0004] The purpose of the utility model is to provide a damper with a Tesla valve in view of the defects and shortcomings of the prior art. The damper has a simple and reasonable structure and is easy to operate. By reasonably setting the various dimensional parameters of the Tesla valve, the tension and compression of the damper can be consistent. The Tesla valve also has the functions of compensation and pressure stabilization to ensure that the system will not have excessive pressure.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model discloses a damper with a Tesla valve, comprising a cylinder, with an upper end cover and a lower end cover fixedly provided at both ends of the cylinder respectively, a piston and a piston rod movably provided in the cylinder, the piston being fixedly connected to the piston rod, the piston dividing the inner cavity of the cylinder into a rod cavity and a rodless cavity, the piston being provided with a damping hole connecting the rod cavity and the rodless cavity, a Tesla valve being connected in series to the outside of the cylinder, the Tesla valve being connected to the upper end cover through an upper pipeline, the Tesla valve being connected to the lower end cover through a lower pipeline, a first fluid channel being provided in the upper end cover respectively connected to the rod cavity and the upper pipeline, a second fluid channel being provided in the lower end cover respectively connected to the rodless cavity and the lower pipeline, a first inlet being provided at one end of the Tesla valve close to the upper pipeline, a second inlet being provided at one end of the Tesla valve close to the lower pipeline, the direction from the first inlet to the second inlet is the low-resistance direction of the fluid of the Tesla valve structure, and the direction from the second inlet to the first inlet is the high-resistance direction of the fluid of the Tesla valve structure.

[0007] Furthermore, two Tesla valves are provided and are respectively located outside the two sides of the cylinder, and the upper pipeline and the lower pipeline are arranged in a one-to-one correspondence with the Tesla valve.

[0008] Furthermore, the upper end cover is provided with a first interface corresponding to the upper pipeline, and the lower end cover is provided with a second interface corresponding to the lower pipeline.

[0009] Furthermore, both the rodless cavity and the rod cavity are filled with damping fluid.

[0010] Furthermore, the damping fluid is dimethyl silicone oil.

[0011] Furthermore, the upper end of the piston rod extends out of the upper end cover and is provided with a connecting piece.

[0012] Furthermore, the inner wall of the lower end of the upper end cover cooperates with the piston rod to form a flow gap, and the rod cavity is connected to the first fluid channel through the flow gap.

[0013] Furthermore, a flow hole is provided at the center of the lower end cover, and the rodless cavity is connected with the second fluid channel through the flow hole.

[0014] Furthermore, the piston is fixedly connected to the piston rod via a nut.

[0015] Furthermore, the upper end cover and the lower end cover are fixedly connected to the cylinder barrel by bolts.

[0016] The beneficial effects of the utility model are as follows: in a damper with a Tesla valve described in the utility model, when the piston rod drives the piston to move downward, the pressure in the rodless chamber increases, and part of the damping fluid in the rodless chamber enters the rod chamber through the damping hole, and the other part of the damping fluid flows in sequence through the lower pipeline, the Tesla valve, and the upper pipeline, and finally enters the rod chamber. At this time, the damping fluid flows from the second inlet of the Tesla valve to the first inlet, and this direction is the fluid high-resistance direction of the Tesla valve structure. When the damping fluid flows along the fluid high-resistance direction, the damping generated is relatively large; when the piston rod drives the piston to move upward, the pressure in the rod chamber increases, and part of the damping fluid in the rod chamber enters the rodless chamber through the damping hole, and the other part of the damping fluid flows through the upper pipeline, the Tesla valve, and the upper pipeline. The Tesla valve and the lower pipeline flow in sequence and finally enter the rodless cavity. At this time, the damping fluid flows from the first inlet of the Tesla valve to the second inlet. This direction is the low-resistance direction of the fluid in the Tesla valve structure. When the damping fluid flows along the low-resistance direction of the fluid, the damping generated is small. The flow resistance of the Tesla valve in two directions is different. By reasonably setting the various dimensional parameters of the Tesla valve, the tension and compression of the damper can be consistent. The Tesla valve also has the functions of compensation and pressure stabilization. When the pressure in the rod cavity is large, the damping fluid flows into the rodless cavity through the Tesla valve. When the pressure in the rodless cavity is large, the damping fluid flows into the rod cavity through the Tesla valve, ensuring that the system will not have excessive pressure, with high safety and stable performance of the damper. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0019] Figure 3 yes Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0020] Figure 4 yes Figure 2 A schematic diagram of the enlarged structure at B in the middle;

[0021] Figure 5 yes Figure 2 Schematic diagram of the enlarged structure at point C in the middle.

[0022] Figure 1-5 In: 1. Cylinder barrel; 2. Upper end cover; 3. Lower end cover; 4. Piston; 5. Piston rod; 6. Rod chamber; 7. Rodless chamber; 8. Tesla valve; 9. Upper pipe; 10. Lower pipe; 21. First fluid channel; 31. Second fluid channel; 81. First inlet; 82. Second inlet; 22. First interface; 32. Second interface; 51. Connector; 23. Flow gap; 33. Flow hole; 11. Nut; 12. Bolt. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings.

[0024] like Figure 1-5 A damper with a Tesla valve is shown, comprising a cylinder 1, with an upper end cover 2 and a lower end cover 3 fixedly disposed at both ends of the cylinder 1, a piston 4 and a piston rod 5 movably disposed in the cylinder 1, the piston 4 being fixedly connected to the piston rod 5, the piston 4 dividing the inner cavity of the cylinder 1 into a rod cavity 6 and a rodless cavity 7, a Tesla valve 8 is connected in series to the outside of the cylinder 1, the Tesla valve 8 is connected to the upper end cover 2 through an upper pipe 9, the Tesla valve 8 is connected to the lower end cover 3 through a lower pipe 10, the upper end cover 2 is provided with a first fluid channel 21 connected to the rod cavity 6 and the upper pipe 9 respectively, so that the damping fluid can flow; the lower end cover 3 is provided with a first fluid channel 21 connected to the rod cavity 6 and the upper pipe 9 respectively, so that the damping fluid can flow; The rod cavity 7 is connected to the second fluid channel 31 of the lower pipe 10, so that the damping fluid can flow; the Tesla valve 8 is provided with a first inlet 81 at one end close to the upper pipe 9, and the Tesla valve 8 is provided with a second inlet 82 at one end close to the lower pipe 10. When the damping fluid passes through the Tesla valve 8, damping will be generated. The direction from the first inlet 81 to the second inlet 82 is the low-resistance direction of the fluid of the Tesla valve 8 structure. When the damping fluid flows along the low-resistance direction of the fluid, the damping generated is small. The direction from the second inlet 82 to the first inlet 81 is the high-resistance direction of the fluid of the Tesla valve 8 structure. When the damping fluid flows along the high-resistance direction of the fluid, the damping generated is large.

[0025] Tesla Valve 8 has a fixed geometric shape to make up for the disadvantage of traditional valves that are easily damaged due to the need for movable parts. It can replace movable valves. Due to the inertia of the fluid, the flow resistance is different when passing through Tesla Valve 8 in different directions.

[0026] Preferably, in this embodiment, two Tesla valves 8 are provided, and are respectively located outside the two sides of the cylinder 1, and the upper pipe 9 and the lower pipe 10 are arranged in a one-to-one correspondence with the Tesla valve 8; the arrangement of two Tesla valves 8 can increase the compensation performance and improve the working efficiency. In the specific working process, when the pressure of the rodless chamber 7 is relatively high, the damping fluid will flow through the lower pipe 10, the Tesla valve 8, and the upper pipe 9 in sequence, and finally enter the rod chamber 6. On the contrary, when the pressure of the rod chamber 6 is relatively high, the damping fluid will flow through the upper pipe 9, the Tesla valve 8, and the lower pipe 10, thereby flowing into the rodless chamber 7. The flow resistance of the Tesla valve 8 in two directions is different. By reasonably setting the various dimensional parameters of the Tesla valve 8, the tension and compression of the damper can be consistent.

[0027] Regarding the specific structure of the Tesla valve 8, reference may be made to a speed-adjustable Tesla valve 8 disclosed in a Chinese patent application (publication number: CN112197033A), and a one-way pipe, an internal combustion engine, and a damper disclosed in a Chinese patent application (publication number: CN218991754U). In view of the fact that the basic structure / principle of the Tesla valve 8 has been disclosed in detail in the prior art, it will not be described in detail in this embodiment.

[0028] Preferably, in this embodiment, the upper end cover 2 is provided with a first interface 22 corresponding to the upper pipe 9 to ensure that the connection of the upper pipe 9 is stable and reliable; the lower end cover 3 is provided with a second interface 32 corresponding to the lower pipe 10 to ensure that the connection of the upper pipe 9 is also stable and reliable.

[0029] Preferably, in this embodiment, the rodless cavity 7 and the rod cavity 6 are both filled with damping liquid, specifically, the damping liquid is dimethyl silicone oil; dimethyl silicone oil has excellent viscosity-temperature stability, ensuring that the damper performance fluctuates less at different temperatures. In addition, dimethyl silicone oil has both shear-thinning properties and excellent compression resistance. Under shear, its viscosity decreases, which helps to improve the output efficiency of the damper; and under compression, the viscosity increases, which helps to enhance the recovery resistance of the damper.

[0030] Preferably, in this embodiment, the upper end of the piston rod 5 extends out of the upper end cover 2 and is provided with a connecting piece 51, which is connected to the external load through the connecting piece 51, so that the piston rod 5 can better withstand the external load and effectively transfer these loads to the piston rod 5 through the connecting piece 51.

[0031] Preferably, in the present embodiment, the inner wall of the lower end of the upper end cover 2 cooperates with the piston rod 5 to form a flow gap 23, and the rod chamber 6 is connected with the first fluid channel 21 through the flow gap 23; preferably, in the present embodiment, a flow hole 33 is provided at the center of the lower end cover 3, and the rodless chamber 7 is connected with the second fluid channel 31 through the flow hole 33, thereby ensuring the flow circulation of the damping fluid.

[0032] Preferably, in this embodiment, the piston 4 and the piston rod 5 are fixedly connected by a nut 11, so that the connection between the two is stable and firm and is not prone to loosening.

[0033] Preferably, in this embodiment, the upper end cover 2 and the lower end cover 3 are fixedly connected to the cylinder 1 by bolts 12. This connection method has the advantages of simple structure and stable and reliable connection, and can ensure that there will be no looseness between the upper end cover 2 and the lower end cover 3 and the cylinder 1 during the operation of the damper.

[0034] The working principle of the utility model is as follows: when the piston rod 5 drives the piston 4 to move downward, the pressure in the rodless chamber 7 increases, part of the damping fluid in the rodless chamber 7 enters the rod chamber 6 through the damping hole, and the other part of the damping fluid will flow through the lower pipe 10, the Tesla valve 8, and the upper pipe 9 in sequence, and finally enter the rod chamber 6. At this time, the damping fluid flows from the second inlet 82 of the Tesla valve 8 to the first inlet 81, which is the high-resistance direction of the fluid of the Tesla valve 8 structure. When the damping fluid flows along the high-resistance direction of the fluid, the damping generated is relatively large; when the piston rod 5 drives the piston 4 to move upward, the pressure in the rod chamber 6 increases, part of the damping fluid in the rod chamber 6 enters the rodless chamber 7 through the damping hole, and the other part of the damping fluid will flow through the upper pipe 9, the Tesla valve 8, and the lower pipe 10 flows in sequence and finally enters the rodless chamber 7. At this time, the damping liquid flows from the first inlet 81 of the Tesla valve 8 to the second inlet 82. This direction is the low-resistance direction of the fluid in the Tesla valve 8 structure. When the damping liquid flows along the low-resistance direction of the fluid, the damping generated is small. The flow resistance of the Tesla valve 8 in two directions is different. By reasonably setting the various dimensional parameters of the Tesla valve 8, the tension and compression of the damper can be consistent. The Tesla valve 8 also has the functions of compensation and voltage stabilization. When the pressure in the rod chamber 6 is relatively high, the damping liquid flows into the rodless chamber 7 through the Tesla valve 8. When the pressure in the rodless chamber 7 is relatively high, the damping liquid flows into the rod chamber 6 through the Tesla valve 8, ensuring that the system will not have the phenomenon of excessive pressure, with high safety and stable performance of the damper.

[0035] The above description is only a preferred embodiment of the present utility model, so all equivalent changes or modifications made according to the structure, features and principles described in the scope of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A damper with a Tesla valve, comprising a cylinder (1), wherein an upper end cover (2) and a lower end cover (3) are fixedly provided at both ends of the cylinder (1), a piston (4) and a piston rod (5) are movably provided in the cylinder (1), the piston (4) and the piston rod (5) are fixedly connected, the piston (4) divides the inner cavity of the cylinder (1) into a rod cavity (6) and a rodless cavity (7), and a damping hole is provided on the piston (4) to connect the rod cavity (6) and the rodless cavity (7), wherein: A Tesla valve (8) is connected in series to the outside of the cylinder (1). The Tesla valve (8) is connected to the upper end cover (2) via an upper pipe (9). The Tesla valve (8) is connected to the lower end cover (3) via a lower pipe (10). The upper end cover (2) is provided with a first fluid channel (21) respectively connected to the rod chamber (6) and the upper pipe (9). The lower end cover (3) is provided with a second fluid channel (31) respectively connected to the rodless chamber (7) and the lower pipe (10). The Tesla valve (8) is provided with a first inlet (81) at one end close to the upper pipe (9). The Tesla valve (8) is provided with a second inlet (82) at one end close to the lower pipe (10). The direction from the first inlet (81) to the second inlet (82) is a low-resistance direction of the fluid of the Tesla valve (8) structure, and the direction from the second inlet (82) to the first inlet (81) is a high-resistance direction of the fluid of the Tesla valve (8) structure.

2. A damper with a Tesla valve according to claim 1, characterized in that: Two Tesla valves (8) are provided and are respectively located outside the two sides of the cylinder (1), and the upper pipeline (9) and the lower pipeline (10) are arranged in a one-to-one correspondence with the Tesla valves (8).

3. A damper with a Tesla valve according to claim 1, characterized in that: The upper end cover (2) is provided with a first interface (22) corresponding to the upper pipe (9), and the lower end cover (3) is provided with a second interface (32) corresponding to the lower pipe (10).

4. A damper with a Tesla valve according to claim 1, characterized in that: The rodless cavity (7) and the rod cavity (6) are both filled with damping fluid.

5. A damper with a Tesla valve according to claim 4, characterized in that: The damping fluid is dimethyl silicone oil.

6. A damper with a Tesla valve according to claim 1, characterized in that: The upper end of the piston rod (5) protrudes from the upper end cover (2) and is provided with a connecting piece (51).

7. A damper with a Tesla valve according to claim 6, characterized in that: The inner wall of the lower end of the upper end cover (2) cooperates with the piston rod (5) to form a flow gap (23), and the rod chamber (6) is connected to the first fluid channel (21) through the flow gap (23).

8. A damper with a Tesla valve according to claim 1, characterized in that: A through-hole (33) is provided at the centre of the lower end cover (3), and the rodless chamber (7) is connected to the second fluid channel (31) via the through-hole (33).

9. A damper with a Tesla valve according to claim 1, characterized in that: The piston (4) and the piston rod (5) are fixedly connected via a nut (11).

10. A damper with a Tesla valve according to claim 1, characterized in that: The upper end cover (2) and the lower end cover (3) are both fixedly connected to the cylinder barrel (1) via bolts (12).

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