Viscous damper with counterweight structure

Abstract

The utility model discloses a viscous damper with a counterweight structure, which comprises an upper mounting plate and a lower mounting plate positioned below the upper mounting plate, the upper part of the lower mounting plate is fixedly connected with a shell with an inner cavity filled with damping fluid, the lower part of the upper mounting plate is fixedly connected with a plunger extending into the damping fluid, the outer wall of the shell is fixedly provided with a support plate, and the upper part of the support plate is fixedly connected with the plunger. The supporting plate is fixedly connected with a compression spring surrounding the upper end of the shell and connected to the upper mounting plate, a plurality of lug handles are arranged around the upper mounting plate in the circumferential direction, the lower portions of the lug handles are connected with tension springs, and the lower ends of the tension springs are connected with balancing weights. Part of vibration energy can be transmitted to the balancing weight, the balancing weight freely vibrates to relieve vibration of a pipeline, the supporting plate and the compressed spring can effectively bear the pipeline with large vibration load, the annular portion can increase the contact area of the plunger and damping liquid, and the damping force of the plunger and the damping liquid is matched, so that the damping effect of the pipeline is improved, and the service life of the pipeline is prolonged. The purpose of reducing vibration of large vibration loading force of the pipeline is achieved, and effective vibration reduction of the pipeline is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of viscous damper technology, and in particular to a viscous damper with a counterweight structure. Background Technology

[0002] Piping systems are widely used in thermal power plants, nuclear power plants, chemical plants, and shipbuilding. During operation, sudden changes in the fluid velocity within the pipeline can cause rapid increases or decreases in pressure, resulting in vibration. Due to the complexity of piping systems, it is difficult to eliminate vibration at its source. Prolonged pipeline vibration significantly shortens the pipeline's lifespan, necessitating vibration damping to ensure the safe operation of the pipeline system. Viscous dampers are common devices used for pipeline vibration reduction. The principle of viscous dampers is to dissipate the pipeline's vibrational kinetic energy through the deformation of the damping fluid, converting the kinetic energy into heat energy in the damping fluid, thus reducing the adverse effects of vibration on the pipeline. When installed below the pipeline, viscous dampers can promptly reduce vibration and ensure the normal operation of the pipeline.

[0003] However, conventional viscous dampers mainly rely on the viscous force of high-viscosity damping fluid to assist in vibration reduction. This results in limited damping force for each viscous damper, leading to poor vibration reduction performance under large vibration loads on the pipeline. To achieve the purpose of vibration reduction for large vibration loads on the pipeline, many viscous dampers need to be installed on the pipeline for damping and vibration reduction. This not only increases the cost of installation and procurement, but also makes the vibration reduction capacity of multiple viscous dampers on the pipeline unstable when installed together. Utility Model Content

[0004] To address the technical problem that existing viscous dampers have limited damping force and poor vibration reduction effect under large vibration loads from pipelines, this utility model provides the following technical solution.

[0005] This utility model discloses a viscous damper with a counterweight structure, comprising an upper mounting plate and a lower mounting plate located below the upper mounting plate. A shell containing damping fluid is fixedly connected to the upper part of the lower mounting plate, and a plunger extending into the damping fluid is fixedly connected to the lower part of the upper mounting plate. A support plate is fixedly provided on the outer wall of the shell, and a compression spring is fixedly connected to the upper end of the support plate and surrounds the shell. A plurality of lugs are arranged around the circumference of the upper mounting plate, and a tension spring is connected to the lower part of each lug. A counterweight is connected to the lower end of each tension spring.

[0006] As a further technical solution, the plunger has several annular portions spaced apart on its axial outer periphery.

[0007] As a further technical solution, the annular portion extends toward the inner wall of the housing.

[0008] As a further technical solution, the annular portion extends toward the inner wall of the plunger.

[0009] As a further technical solution, the counterweight is a hollow ring structure, and the lower ends of all the tension springs are connected to the same counterweight.

[0010] As a further technical solution, the ear stems are evenly distributed in the circumferential direction of the upper mounting plate.

[0011] The beneficial effects of this invention are as follows: By adding tension springs and counterweights to both sides of the upper mounting plate via two lugs, and connecting the counterweights together through the tension springs, some of the vibration energy can be transferred to the counterweights, allowing them to vibrate freely and thus reducing pipeline vibration. Simultaneously, the structure of the support plate and compression springs can effectively bear the pipeline under large vibration loads. Combined with the viscous damping force of the plunger and damping fluid, this achieves the purpose of reducing the large vibration load on the pipeline, ensuring effective vibration reduction. The annular portion increases the contact area between the plunger and the damping fluid, further effectively reducing the large vibration load on the pipeline. Attached Figure Description

[0012] Figure 1 This is a cross-sectional planar structural diagram of the viscous damper with counterweight structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the cross-sectional structure of the viscous damper with counterweight structure of this utility model along the AA direction;

[0014] In the diagram: 1-Upper mounting plate; 2-Hear handle; 3-Compression spring; 4-Plunger; 5-Housing; 6-Tension spring; 7-Support plate; 8-Counterweight; 9-Damping fluid; 10-Lower mounting plate; 11-Annular part. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0016] In the description of this utility model, it should be understood that the terms "upper" and "lower" 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," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0017] like Figure 1 and Figure 2 As shown, this utility model discloses a viscous damper with a counterweight structure, including an upper mounting plate 1 and a lower mounting plate 10 located below the upper mounting plate 1. The upper mounting plate 1 is connected to a pipe clamp accessory, and the lower mounting plate 10 is connected to a fixed steel beam. A housing 5 is fixedly connected to the upper part of the lower mounting plate 10, and the inner cavity of the housing 5 is filled with a high-viscosity damping fluid 9. A plunger 4 extending into the damping fluid 9 is fixedly connected to the lower part of the upper mounting plate 1.

[0018] When the pipeline vibrates, the vibration is transmitted from the upper mounting plate 1 to the plunger 4. The plunger 4 exerts a squeezing and shearing effect on the damping fluid 9, and the damping fluid 9 exerts a reverse damping force on the plunger 4, converting the kinetic energy of the plunger 4's vibration into heat energy, thereby reducing the adverse effects of vibration on the pipeline.

[0019] In a preferred embodiment, a support plate 7 is fixedly provided on the outer wall of the housing 5. The support plate 7 is a ring-shaped plate structure, which is fitted onto the outer wall of the housing 5 and connected and fixed to the housing 5. A compression spring 3 is fixedly connected to the support plate 7. The compression spring 3 is arranged around the housing 5, and the upper end of the compression spring 3 is connected to the upper mounting plate 1. When the pipeline vibrates, the vibration can be transmitted to the compression spring 3 through the upper mounting plate 1, and the compression spring 3 can bear the weight of the pipeline and dampen the vibration, which can effectively bear the pipeline with large vibration load.

[0020] In a preferred embodiment, a plurality of lugs 2 are arranged circumferentially around the upper mounting plate 1, and the lugs 2 are evenly distributed circumferentially around the upper mounting plate 1. In this embodiment, there are eight lugs 2. Each lug 2 is connected to a tension spring 6 at its lower part, and there are also eight tension springs 6. The lower end of the tension spring 6 is connected to a counterweight 8. In this embodiment, the counterweight 8 is a hollow ring structure, and there is only one counterweight 8. The lower ends of all the tension springs 6 are connected to the same counterweight 8. When the pipeline vibrates, some of the vibration energy will be transferred to the counterweight 8 through the tension springs 6, causing the counterweight 8 to vibrate freely. In this way, the vibration of the pipeline is reduced by energy transfer.

[0021] Of course, the counterweight 8 is not limited to this structure. Each tension spring 6 can also be connected to a counterweight 8 at its lower end. In this case, the number of counterweights 8 is the same as the number of tension springs 6. When the pipe vibrates, some of the vibration energy will be transferred to each counterweight 8 through each tension spring 6, causing multiple counterweights 8 to vibrate freely. The magnetic bead structure can also reduce the vibration of the pipe by transferring energy. Therefore, this utility model does not make any special limitation on the connection method of tension springs 6 and counterweights 8.

[0022] In a preferred embodiment, the plunger 4 has a plurality of annular portions 11 spaced apart along its axial outer periphery. These annular portions 11 are evenly distributed in the vertical direction of the plunger 4. The annular portions 11 increase the contact area between the plunger 4 and the damping fluid 9, thereby increasing the squeezing and shearing effect of the plunger 4 on the damping fluid 9. The damping fluid 9 then exerts a greater reverse damping force on the plunger 4, converting the kinetic energy of the plunger 4's vibration into heat energy, further effectively reducing the large vibration load on the pipeline. The annular portions 11 can extend towards the inner wall of the housing 5, and similarly, they can extend towards the inner wall of the plunger 4. Both of these different extension methods increase the contact area between the plunger 4 and the damping fluid 9, further effectively reducing the large vibration load on the pipeline.

[0023] The working principle of this utility model is as follows: During installation, damping fluid 9 is first injected into the housing 5, then the support plate 7 is fixed on the outer circumference of the housing 5, then the compression spring 3 is fitted on the outer circumference of the housing 5, then the counterweight 8 is fitted on the outer circumference of the housing 5, then each tension spring 6 is suspended on the lug 2 at the bottom of the upper mounting plate 1, then the plunger 4 is inserted into the housing 5 through the upper mounting plate 1 and supported by the compression spring 3, and finally the counterweight 8 is lifted by each tension spring 6.

[0024] During operation, the pipeline is connected to the upper mounting plate 1 via pipe clamps. Vibration from the pipeline is transmitted to the plunger 4 through the upper mounting plate 1. Since the plunger 4 is immersed in the damping fluid 9, the damping fluid 9 generates a reverse damping force on the plunger 4 and the annular portion 11 to reduce vibration. The remaining vibration energy is transmitted to the counterweight 8 through the tension spring 6, causing the counterweight 8 to vibrate freely. This energy transfer method mitigates pipeline vibration and improves the vibration reduction effect. Simultaneously, the structure of the support plate 7 and the compression spring 3 can effectively support pipelines with large vibration loads. Combined with the viscous damping force of the plunger 4 and the damping fluid 9, this achieves the purpose of reducing large vibration loads on the pipeline, ensuring effective vibration reduction.

[0025] The preferred embodiments and examples of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments and examples. Within the scope of knowledge possessed by those skilled in the art, various changes or equivalent substitutions can be made without departing from the concept of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A viscous damper with a counterweight structure, comprising an upper mounting plate (1) and a lower mounting plate (10) located below the upper mounting plate (1), wherein a shell (5) containing damping fluid (9) is fixedly connected to the upper part of the lower mounting plate (10), and a plunger (4) extending into the damping fluid (9) is fixedly connected to the lower part of the upper mounting plate (1), characterized in that: The outer wall of the housing (5) is fixedly provided with a support plate (7), and the support plate (7) is fixedly connected with a compression spring (3) that surrounds the upper end of the housing (5) and is connected to the upper mounting plate (1). The upper mounting plate (1) is surrounded by a plurality of lugs (2) in the circumferential direction. The lower part of the lugs (2) is connected with a tension spring (6), and the lower end of the tension spring (6) is connected with a counterweight (8).

2. The viscous damper with counterweight structure according to claim 1, characterized in that: The plunger (4) has several annular portions (11) spaced apart on its axial outer periphery.

3. The viscous damper with counterweight structure according to claim 2, characterized in that: The annular portion (11) extends toward the inner wall of the housing (5).

4. The viscous damper with counterweight structure according to claim 2, characterized in that: The annular portion (11) extends toward the inner wall of the plunger (4).

5. The viscous damper with counterweight structure according to claim 1, characterized in that: The counterweight (8) is a hollow ring structure, and the lower ends of all the tension springs (6) are connected to the same counterweight (8).

6. The viscous damper with counterweight structure according to claim 1, characterized in that: The ear stem (2) is evenly distributed in the circumferential direction of the upper mounting plate (1).

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