A multi-stage shock absorber structure

Abstract

The present application relates to the field of shock-absorbing mechanical components, and particularly relates to a multi-stage shock absorber structure, comprising an upper joint, a lower joint, an upper oil cylinder, a lower oil cylinder, an oil cylinder outer tube, a spring and a pressure-resistant balloon, the upper oil cylinder and the lower oil cylinder are coaxially and spaced apart arranged inside the oil cylinder outer tube, the upper joint penetrates the upper oil cylinder and is in contact with the lower oil cylinder, the side wall of the part of the upper joint extending out of the upper oil cylinder and the inner wall of the oil cylinder outer tube form a damping flow channel, the lower oil cylinder is connected with the lower joint, the lower oil cylinder and the upper oil cylinder are communicated through the damping flow channel, and the spring and the pressure-resistant balloon are both arranged inside the lower oil cylinder. The present application is sensitive to external shock, can instantly respond to the size of external shock energy, automatically starts the multi-stage shock-absorbing mode, fully utilizes the advantages of gas shock absorption, liquid shock absorption and mechanical shock absorption, reasonably avoids the shortcomings of various shock-absorbing modes, improves the shock-absorbing effect, and increases the service life of the shock-absorbing structure.

Description

Technical Field

[0001] This invention relates to the field of shock-absorbing mechanical components, specifically a multi-stage shock absorber structure. Background Technology

[0002] When mechanical equipment is subjected to tensile, compressive, or torsional loads, uneven load distribution often leads to vibration. Examples include longitudinal vibration of drill strings during oil and gas exploration and development due to uneven cutting of the formation, and vertical vibration of motor vehicles caused by uneven road surfaces. The impact loads generated by these vibrations can damage mechanical components, leading to failure, especially fatigue failure.

[0003] Conventional vibration damping methods include mechanical damping, such as damping through the compressibility of springs, damping through the compressibility and flow resistance of liquids, and damping through compressible gases, etc. These damping structures often only have a single-stage damping function. Gas damping is sensitive, but it has particularly high requirements for the sealing of the cylinder, and the seals are prone to damage. Mechanical damping, represented by springs, has high requirements for spring materials, is prone to fatigue damage, and has a short lifespan. Liquid damping has low sensitivity due to the poor compressibility of liquids. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention provides a multi-stage shock absorber structure.

[0005] This invention is achieved through the following technical solution:

[0006] A multi-stage shock absorber structure includes an upper connector, a lower connector, an upper cylinder, a lower cylinder, an outer cylinder cylinder, a spring, and a pressure-resistant balloon. The upper and lower cylinders are coaxially spaced at both ends of the outer cylinder cylinder. The upper connector passes through the upper cylinder and contacts the lower cylinder. A damping flow channel is formed between the side wall of the upper connector extending out of the upper cylinder and the inner wall of the outer cylinder cylinder. The lower cylinder is connected to the lower connector and communicates with the upper cylinder through the damping flow channel. The spring and the pressure-resistant balloon are both disposed inside the lower cylinder, and the axis of the spring is aligned with the axis of the lower cylinder. Initially, the lower cylinder is filled with hydraulic oil, the pressure-resistant balloon is filled with gas, and the spring is in an extended state.

[0007] Preferably, the pressure-resistant balloon is composed of a composite of an oil-resistant high-strength fiber layer and a rubber layer.

[0008] Preferably, at least one pressure-resistant balloon is provided.

[0009] Preferably, the gas is nitrogen.

[0010] Preferably, the initial air pressure of the pressure-resistant balloon is 1.0 to 1.5 bar.

[0011] Preferably, the density of the pressure-resistant balloon is the same as that of the hydraulic oil, and the pressure-resistant balloon is suspended in the hydraulic oil.

[0012] Preferably, the density of the hydraulic oil is 1.07 to 1.09 mg / mm3.

[0013] Preferably, the lower cylinder is provided with an isolation tube, and the spring is disposed inside the isolation tube.

[0014] Preferably, the isolation tube is coaxial with the spring, and the pressure-resistant balloon is disposed on the outside of the isolation tube.

[0015] Preferably, the isolation tube is made of an elastic material.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This invention discloses a multi-stage shock absorber structure that is highly sensitive to external vibrations. It can automatically activate multi-stage shock absorption modes based on the magnitude and immediate response of external vibration energy. It fully utilizes the advantages of gas shock absorption, liquid shock absorption, and mechanical shock absorption (spring), while reasonably avoiding the disadvantages of various shock absorption methods, thereby improving the shock absorption effect and increasing the service life of the shock absorption structure.

[0018] When the lower connector is under pressure, the pressure-resistant balloon is compressed and deformed, and the upper connector compresses the spring. At this time, the compression and shock absorption of the pressure-resistant balloon is the main factor, forming a primary shock absorption.

[0019] When the pressure on the lower joint increases, the pressure-resistant balloon is further compressed, the lower joint moves upward, and the spring is further compressed. At this time, the spring is the main damping mechanism, forming a secondary damping system.

[0020] As the pressure on the lower connector continues to increase, the pressure-resistant balloon is further compressed, and the hydraulic oil in the lower cylinder rises to the upper cylinder through the mud-blocking channel. The lower connector moves upward, and the spring is further compressed. At this point, hydraulic damping and spring shock absorption are the main mechanisms, forming a three-stage damping system. After the pressure load on the lower connector disappears, due to the rebound of the spring and the pressure-resistant balloon, the lower connector moves downward, and the hydraulic oil in the upper cylinder flows back to the lower cylinder.

[0021] Furthermore, the number of pressure-resistant balloons can be adaptively set according to the balloon's volume and the lower oil cylinder's capacity, providing high flexibility.

[0022] Furthermore, nitrogen was chosen as the gas for safety and economic reasons, aligning with green principles. Additionally, the insulating tube, made of elastic material, adjusts its state synchronously with the spring's position, consistently isolating the spring and the pressure-resistant balloon, thus enhancing the safety of the shock-absorbing structure. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a multi-stage shock absorber structure according to the present invention;

[0024] In the diagram, 1. Upper connector; 2. Lower connector; 3. Upper cylinder; 4. Lower cylinder; 5. Cylinder outer cylinder; 6. Damping flow channel; 7. Spring; 8. Pressure-resistant balloon; 9. Isolation pipe; 10. Hydraulic oil. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to specific embodiments. These descriptions are for explanation purposes only and are not intended to limit the scope of the invention.

[0026] This invention discloses a multi-stage shock absorber structure, referring to... Figure 1 The system includes an upper connector 1, a lower connector 2, an upper cylinder 3, a lower cylinder 4, an outer cylinder 5, a spring 7, a pressure-resistant balloon 8, and an isolation tube 9. The upper cylinder 3 and the lower cylinder 4 are coaxially spaced inside the outer cylinder 5. The upper connector 1 penetrates the upper cylinder 3 and contacts the lower cylinder 4. A damping flow channel 6 is formed between the side wall of the part of the upper connector 1 extending out of the upper cylinder 3 and the interior of the outer cylinder 5. The lower cylinder 4 is connected to the lower connector 2, and the lower cylinder 4 is connected to the upper cylinder 3 through the damping flow channel 6.

[0027] Both the spring 7 and the pressure-resistant balloon 8 are located inside the lower oil cylinder 4, and the axis of the spring 7 is aligned with the axis of the lower oil cylinder 4. Initially, the lower oil cylinder 4 is filled with hydraulic oil 10, and the spring 7 is in an extended state.

[0028] There is at least one pressure-resistant balloon 8. The pressure-resistant balloon 8 is composed of a composite layer of oil-resistant high-strength fiber and rubber.

[0029] The pressure-resistant balloon 8 is filled with gas, which is nitrogen in this embodiment. The initial gas pressure inside the pressure-resistant balloon 8 is 1.0 to 1.5 bar.

[0030] The density of the pressure-resistant balloon 8 is the same as that of the hydraulic oil 10, and the pressure-resistant balloon 8 is suspended in the hydraulic oil 10. The density of the hydraulic oil 10 is 1.07~1.09mg / mm³. 3 In this embodiment, the hydraulic oil is silicone oil.

[0031] Spring 7 is located inside isolation tube 9, and isolation tube 9 is coaxial with spring 7. Pressure-resistant balloon 8 is located outside isolation tube 9. Isolation tube 9 separates spring 7 and pressure-resistant balloon 8 in lower oil cylinder 4, preventing direct contact between spring 7 and pressure-resistant balloon 8 from causing damage to pressure-resistant balloon 8.

[0032] The isolation tube 9 is made of an elastic material. In this embodiment, the isolation tube 9 is made of spring steel or oil-resistant rubber.

[0033] When the lower connector 2 is under pressure, the pressure-resistant balloon 8 is compressed and deformed, and the lower connector 2 moves upward, compressing the spring 7. At this time, the compression and shock absorption of the pressure-resistant balloon 8 is the main factor, forming a primary shock absorption.

[0034] When the pressure on the lower connector 2 increases, the pressure-resistant balloon 8 is further compressed, the lower connector 2 moves upward, and the spring 7 is further compressed. At this time, the spring 7 is the main damper, forming a secondary damping system.

[0035] When the pressure on the lower connector 2 continues to increase, the pressure-resistant balloon 8 is further compressed, and the hydraulic oil 10 in the lower cylinder 4 rises to the upper cylinder 3 through the damping channel 6. The lower connector 2 rises, and the spring 7 is further compressed. At this time, the hydraulic damping and the spring 7 are the main damping mechanisms, forming a three-stage damping system.

[0036] When the pressure load on the lower connector 2 disappears, due to the rebound of the spring 7 and the pressure-resistant balloon 8, the lower connector 2 moves downward, and the hydraulic oil 10 of the upper cylinder 3 flows back to the lower cylinder 4.

Claims

1. A multi-stage shock absorber structure, characterized in that, The system includes an upper connector (1), a lower connector (2), an upper cylinder (3), a lower cylinder (4), an outer cylinder cylinder (5), a spring (7), and a pressure-resistant balloon (8). The upper cylinder (3) and the lower cylinder (4) are coaxially spaced inside the outer cylinder cylinder (5). The upper connector (1) penetrates the upper cylinder (3) and contacts the lower cylinder (4). The side wall of the upper connector (1) extending out of the upper cylinder (3) forms a damping flow channel (6) between it and the inner wall of the outer cylinder cylinder (5). The lower cylinder (4) is connected to the lower connector, and the lower cylinder (4) is connected to the upper cylinder (3) through the damping flow channel (6). The spring (7) and the pressure-resistant balloon (8) are both located inside the lower cylinder (4). The axis of the spring (7) is aligned with the axis of the lower cylinder (4). Initially, the lower cylinder (4) is filled with hydraulic oil (10), the pressure-resistant balloon (8) is filled with gas, and the spring (7) is in an extended state. The lower cylinder (4) is provided with an isolation tube (9), and the spring (7) is disposed inside the isolation tube (9); the isolation tube (9) is made of elastic material; The isolation tube (9) is coaxial with the spring (7), and the pressure-resistant balloon (8) is located on the outside of the isolation tube (9).

2. The multi-stage shock absorber structure according to claim 1, characterized in that, The pressure-resistant balloon (8) is composed of an oil-resistant high-strength fiber layer and a rubber layer.

3. The multi-stage shock absorber structure according to claim 1, characterized in that, There is at least one pressure-resistant balloon (8).

4. The multi-stage shock absorber structure according to claim 1, characterized in that, The gas is nitrogen.

5. The multi-stage shock absorber structure according to claim 1, characterized in that, The initial air pressure of the pressure-resistant balloon (8) is 1.0~1.5 bar.

6. The multi-stage shock absorber structure according to claim 1, characterized in that, The density of the pressure-resistant balloon (8) is the same as that of the hydraulic oil (10), and the pressure-resistant balloon (8) is suspended in the hydraulic oil (10).

7. The multi-stage shock absorber structure according to claim 1, characterized in that, The density of the hydraulic oil (10) is 1.07~1.09 mg / mm³. 3 .

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