Prestressed viscous damper

Abstract

The utility model relates to the technical field of damping device, concretely relates to a prestress viscous damper, the utility model adopts is a kind of damper piston rod when installing is compressed, make structure have initial stiffness enhancement structure stability effect. Under great vibration, viscous part intervenes;Again reduce structure vibration frequency, the utility model includes cylinder body, piston, piston rod, acting force spring and viscous medium. By pre-compression to piston rod when installing, make spring produce prestress, to enhance the rigidity of connection under low vibration condition;Under high vibration condition, viscous medium intervenes energy dissipation, further reduce vibration frequency. The damper simple structure, easy installation is applicable to the shock absorption connection of building, mechanical equipment, with good adaptability and stability.

Description

Technical Field

[0001] This utility model relates to the field of vibration damping device technology, specifically to a prestressed viscous damper. Background Technology

[0002] Existing vibration reduction methods for equipment mostly employ passive isolation devices such as rubber vibration isolation pads and spring vibration dampers. These devices have limited effectiveness under low-frequency, small-amplitude vibrations, easily leading to insufficient structural stiffness, while under high-frequency, large-amplitude vibrations, sudden changes in stiffness may cause structural instability or damage. In addition, traditional dampers often cannot balance initial stiffness and energy dissipation capacity, making it difficult to perform well under different vibration conditions.

[0003] Therefore, there is an urgent need for a damping device that can both provide initial stiffness to enhance structural stability and effectively dissipate energy under strong vibrations. Utility Model Content

[0004] Purpose of the utility model: To provide a prestressed viscous damper to solve the problems mentioned above.

[0005] Technical solution: A prestressed viscous damper includes: a cylinder, a piston, a piston rod, a force spring, and a viscous medium; the piston is disposed inside the cylinder, dividing the cylinder into an upper chamber and a lower chamber; one end of the piston rod is connected to the piston, and the other end extends outside the cylinder; the force spring is disposed between the piston and the piston rod; the viscous medium is filled inside the cylinder.

[0006] In a further embodiment, the piston is provided with a through hole for the passage of a viscous medium.

[0007] In a further embodiment, there are multiple through holes arranged in a ring shape.

[0008] In a further embodiment, the front end and rear end of the cylinder are respectively provided with a front end cover and a rear end cover, and the front end cover and the rear end cover are simultaneously sleeved with the piston rod.

[0009] In a further embodiment, a rear sealing ring is provided between the rear end cover and the cylinder body and the piston rod, respectively; The front end cover is provided with a front sealing ring between itself and the cylinder body and the piston rod, respectively.

[0010] In a further embodiment, a support ring is provided between the front end cover and the rear end cover and the piston rod.

[0011] In a further embodiment, the viscous medium is silicone oil or a polymeric viscous liquid.

[0012] In a further embodiment, the force spring is a disc spring or a helical spring.

[0013] In a further embodiment, the rear end cover is provided with an oil inlet for injecting or replenishing a viscous medium.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. This utility model enhances the rigidity of the installation structure through a specific output structure.

[0015] 2. Compared with the previous conventional structure, this utility model increases the product's adaptability and stability.

[0016] 3. The mechanism of this utility model can ensure the strength and stability of the product, whether in building structure or mechanical structure. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the present invention.

[0018] Reference numerals: 1. Cylinder body; 2. Piston rod; 3. Force spring; 4. Front end cover; 5. Rear end cover; 6. Rear sealing ring; 7. Front sealing ring; 8. Support ring; 9. Detailed Implementation

[0019] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0022] A prestressed viscous damper includes: a cylinder 1, a piston 2, a piston rod 3, a force spring 4, and a viscous medium. The piston 2 divides the cylinder 1 into upper and lower chambers, and the piston rod 3 is connected to the piston 2 and extends out of the cylinder 1. The force spring 4 is disposed between the piston 2 and the bottom of the cylinder 1. During installation, the spring is pre-compressed by compressing the piston rod 3 to provide initial stiffness. During vibration, the viscous medium flows through the through-hole on the piston 2, generating a damping effect and dissipating energy.

[0023] In one embodiment, such as Figure 1 As shown, the piston 2 is provided with a through hole for passing a viscous medium.

[0024] In one embodiment, such as Figure 1 As shown, there are multiple through holes arranged in a ring.

[0025] In one embodiment, such as Figure 1 As shown, the front end and rear end of the cylinder body 1 are respectively provided with a front end cover 5 and a rear end cover 6, and the front end cover 5 and the rear end cover 6 are simultaneously sleeved with the piston rod 3.

[0026] In one embodiment, such as Figure 1 As shown, a rear sealing ring 7 is provided between the rear end cover 6 and the cylinder body 1 and the piston rod 3 respectively; The front end cover 5 is provided with a front sealing ring 8 between it and the cylinder body 1 and the piston rod 3 respectively.

[0027] In one embodiment, such as Figure 1 As shown, a support ring 9 is provided between the front end cover 5 and the rear end cover 6 and the piston rod 3.

[0028] In one embodiment, such as Figure 1 As shown, the viscous medium is silicone oil or a polymeric viscous liquid.

[0029] In one embodiment, such as Figure 1As shown, the force spring 4 is a disc spring or a helical spring. During installation, the disc spring is pre-compressed by compressing the piston rod 3 to generate initial prestress, thereby providing structural stiffness under no-vibration or low-vibration conditions.

[0030] In one embodiment, such as Figure 1 As shown, the rear end cover 6 is provided with an oil inlet for injecting or replenishing viscous media, and the outer surface of the cylinder body 1 is coated with an epoxy anti-rust coating to improve corrosion resistance.

[0031] In one embodiment, such as Figure 1 As shown, during installation, the compression piston rod 3 drives the piston 2 to press down on the spring 4; when assembled, the prestress of the damper increases the structural stiffness. When the equipment vibrates, the viscous component intervenes, further reducing the vibration frequency.

[0032] Working principle: During installation, the piston rod 3 is compressed, which preloads the force spring 4, giving the damper initial stiffness. When the equipment experiences low-frequency, small-amplitude vibrations, the spring provides restoring force to maintain structural stability; when high-frequency, large-amplitude vibrations occur, the movement of piston 2 forces the viscous medium to flow through the through-hole, generating damping force, dissipating energy, and reducing vibration response.

[0033] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A prestressed viscous damper, characterized in that, include: The cylinder body, piston, piston rod, force spring, and viscous medium; the piston is disposed inside the cylinder body, dividing the cylinder body into an upper chamber and a lower chamber; One end of the piston rod is connected to the piston, and the other end extends outside the cylinder body; the force spring is disposed between the piston and the piston rod; the viscous medium is filled inside the cylinder body.

2. The prestressed viscous damper according to claim 1, characterized in that: The piston is provided with a through hole for passing a viscous medium.

3. A prestressed viscous damper according to claim 2, characterized in that: There are multiple through holes, arranged in a ring shape.

4. A prestressed viscous damper according to claim 1, characterized in that: The cylinder body is provided with a front cover and a rear cover at the front and rear ends, respectively, and the front cover and the rear cover are sleeved with the piston rod.

5. A prestressed viscous damper according to claim 4, characterized in that: The rear end cover is provided with a rear sealing ring between itself and the cylinder body and the piston rod, respectively; The front end cover is provided with a front sealing ring between itself and the cylinder body and the piston rod, respectively.

6. A prestressed viscous damper according to claim 4, characterized in that: A support ring is provided between the front end cover and the rear end cover and the piston rod.

7. A prestressed viscous damper according to claim 1, characterized in that: The viscous medium is silicone oil or a polymeric viscous liquid.

8. A prestressed viscous damper according to claim 1, characterized in that: The force-applying spring is a disc spring or a helical spring.

9. A prestressed viscous damper according to claim 4, characterized in that: The rear end cover is provided with an oil inlet for injecting or replenishing viscous media.

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