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CN-224214623-U - Damping force adjustable vibration damper

CN224214623UCN 224214623 UCN224214623 UCN 224214623UCN-224214623-U

Abstract

The utility model discloses a damping force adjustable vibration damper which comprises an upper connecting plate connected with a pipe clamp accessory and a lower connecting plate connected with a fixed steel frame, wherein the upper part of the lower connecting plate is fixedly connected with a lower shell filled with damping liquid, the lower part of the upper connecting plate is fixedly connected with an upper shell with a through hole at the lower end, a sealing sleeve is connected between the upper shell and the lower shell, the lower part of the upper shell is fixedly connected with a plunger which surrounds the through hole and stretches into the damping liquid, the inner cavity of the upper shell is connected with sealing partition plates which are arranged oppositely and are connected with adjusting screws in a sliding manner, and the two sealing partition plates are positioned at two sides of the through hole. According to the utility model, the positions of the two sealing clapboards can be adjusted, so that the negative pressure in the cavity between the two sealing clapboards can be adjusted, the liquid level of damping liquid can be changed, and the contact area of the plunger and the damping liquid can be changed, thereby controlling the damping force of the viscous damper, playing an adjustable damping force effect, and ensuring the vibration reduction effect of the pipeline.

Inventors

  • YANG HONGLIN
  • XIONG ZHIJUN
  • LI MINGXIONG

Assignees

  • 湖北宏泰石化设备有限公司

Dates

Publication Date
20260508
Application Date
20250521

Claims (6)

  1. 1. The damping device with the adjustable damping force comprises an upper connecting plate (1) connected with a pipe clamp accessory and a lower connecting plate (13) connected with a fixed steel frame, wherein a lower shell (12) filled with damping fluid (11) is fixedly connected to the upper portion of the lower connecting plate (13), the damping device is characterized in that an upper shell (6) with a through hole (14) is formed in the lower portion of the upper connecting plate (1) in a fixedly connected mode, a sealing sleeve (8) is connected between the upper shell (6) and the lower shell (12), a plunger (9) extending into the damping fluid (11) and encircling the through hole (14) is fixedly connected to the lower portion of the upper shell (6), sealing partition plates (4) which are arranged oppositely and connected with adjusting screws (2) are connected to the inner cavity of the upper shell (6) in a sliding mode, and the two sealing partition plates (4) are located on two sides of the through hole (14).
  2. 2. Damping force adjustable vibration attenuation device according to claim 1, characterized in that one side of the adjusting screw (2) is screwed to the upper housing (6), and one end of the adjusting screw (2) close to the sealing partition (4) is rotatably connected to the sealing partition (4) through a bearing (3).
  3. 3. The damping force adjustable vibration attenuation device according to claim 1, wherein the upper end and the lower end of the sealing partition plate (4) are connected with sealing rings (5).
  4. 4. The damping force adjustable vibration attenuation device according to claim 1, wherein a siphon tube (10) located in the inner cavity of the plunger (9) is connected to the lower end of the through hole (14), and the lower end of the siphon tube (10) extends into the damping fluid (11).
  5. 5. A damping force adjustable vibration damper according to claim 4, wherein said siphon tube (10) is made of a rigid material.
  6. 6. The damping force adjustable vibration attenuation device according to claim 1, wherein the sealing sleeve (8) is provided with a plurality of ventilation holes (7).

Description

Damping force adjustable vibration damper Technical Field The utility model relates to the technical field of dampers, in particular to a damping force adjustable vibration damper. Background The pipeline system is mainly applied to various industrial pipelines such as water supply, water drainage, heat supply, gas supply, long-distance petroleum and natural gas transportation, agricultural irrigation, hydraulic engineering and the like. In the operation process of the pipeline, the liquid speed and the liquid temperature in the pipeline can be suddenly changed, the pressure in the pipeline can be rapidly increased or reduced, the pipeline can generally vibrate, the pipeline system is complex in composition, vibration is hardly eliminated from the vibration source, the service life of the pipeline can be greatly shortened due to long-term pipeline vibration, and therefore the pipeline needs to be damped, and the safe operation of the pipeline system is further ensured. The viscous damper is a general device for vibration reduction of pipelines, and the principle of vibration reduction of the viscous damper is to consume vibration kinetic energy of the pipelines through deformation of damping liquid, convert the vibration kinetic energy into heat energy of the damping liquid, reduce adverse effects of vibration on the pipelines and ensure safe operation of pipeline systems. The upper connecting plate of viscous damper is connected in the pipeline, and the lower connecting plate is connected to fixed steelframe, and viscous damper can real-time vibration reduction is carried out to the pipeline in pipeline operation, guarantees the normal operating of pipeline. However, the damping force of the conventional viscous damper is basically constant, and after the conventional viscous damper is connected with a pipeline, the damping force is insufficient or over-damped during application of the viscous damper due to different vibration conditions of the pipeline, so that the damping of the pipeline is not facilitated. Disclosure of utility model In order to solve the technical problems that the damping force of the conventional viscous damper is basically constant, and insufficient damping force or over damping can occur when the viscous damper is applied in the prior art, and the damping of a pipeline is not facilitated, the utility model provides the following technical scheme. The utility model relates to a damping force adjustable vibration damper which comprises an upper connecting plate connected with a pipe clamp accessory and a lower connecting plate connected with a fixed steel frame, wherein the upper part of the lower connecting plate is fixedly connected with a lower shell filled with damping liquid, the lower part of the upper connecting plate is fixedly connected with an upper shell with a through hole at the lower end, a sealing sleeve is connected between the upper shell and the lower shell, the lower part of the upper shell is fixedly connected with a plunger which surrounds the through hole and stretches into the damping liquid, the inner cavity of the upper shell is connected with sealing separation plates which are arranged oppositely and are connected with adjusting screws, and the two sealing separation plates are positioned at two sides of the through hole. As a further technical scheme, one side of the adjusting screw is connected to the upper shell in a threaded manner, and one end, close to the sealing partition plate, of the adjusting screw is connected to the sealing partition plate in a rotating manner through a bearing. As a further technical scheme, sealing rings are connected to the upper end and the lower end of the sealing partition plate. As a further technical scheme, the lower end of the through hole is fixedly connected with a siphon pipe positioned in the inner cavity of the plunger, and the lower end of the siphon pipe extends into the damping fluid. As a further technical solution, the siphon tube is made of rigid material. As a further technical scheme, the sealing sleeve is provided with a plurality of ventilation holes. The utility model has the beneficial effects that the two sealing clapboards are oppositely arranged in the upper shell, the siphon pipe which is connected and communicated with the upper shell through the through hole is arranged in the plunger, the lower end of the siphon pipe extends into the damping liquid, the negative pressure in the cavity between the two sealing clapboards can be further regulated by regulating the positions of the two sealing clapboards, so that the liquid level of the damping liquid is changed, the contact area of the plunger and the damping liquid is changed, the damping force of the viscous damper is controlled, the adjustable damping force effect is achieved, and the vibration reduction effect of the pipeline is ensured. Drawings FIG. 1 is a schematic cross-sectional plan view of a damping force adjustable vibration attenuatio