Friction energy dissipation viscous damper

Abstract

The viscous damper comprises an upper connecting plate connected with a pipe clamp accessory and a lower connecting plate located below the upper connecting plate, the lower portion of the upper connecting plate is fixedly connected with an upper shell, and the upper portion of the lower connecting plate is fixedly connected with a lower shell. A sealing sleeve is connected between the upper shell and the lower shell, damping liquid is arranged in an inner cavity of the lower shell, a plunger extending into the damping liquid is fixedly arranged on the lower portion of the upper connecting plate, and an adjusting screw is connected to the outer wall of the lower shell in a penetrating and threaded mode. The end, close to the plunger, of the adjusting screw rod is provided with a plurality of elastic bodies which abut against the lower portion of the plunger in a friction mode. According to the viscous damper, vibration energy can be consumed through friction loss of the elastic body and the plunger, the viscous damper can adapt to the working condition of wider vibration frequency, the friction force of the elastic body and the plunger can be adjusted according to the actual vibration reduction requirement, and the vibration reduction capacity of the viscous damper is adjusted.

Description

TECHNICAL FIELD

[0001] The utility model relates to viscous damper technical field especially relates to a friction energy dissipation viscous damper. BACKGROUND

[0002] Pipeline system is widely used in thermal power plant, nuclear power plant, chemical industry, ship and other fields, in the operation process, due to the sudden change of liquid velocity in the pipeline, the pressure in the pipeline will rise or fall rapidly, causing the vibration phenomenon of pipeline, due to the complex composition of pipeline system, it is difficult to eliminate vibration from the source of vibration. Long-term pipeline vibration can greatly shorten the service life of the pipeline, so it is necessary to carry out vibration reduction for the pipeline, and then ensure the safe operation of the pipeline system. Viscous damper is a general equipment for pipeline vibration reduction, the principle of viscous damper vibration reduction is to consume the vibration kinetic energy of pipeline through the deformation of damping liquid, and the vibration kinetic energy is converted into the heat energy of damping liquid, reducing the adverse effects of vibration on pipeline.

[0003] However, the viscous damper commonly used in the existing pipeline only relies on the viscous force of damping liquid for vibration reduction, and the damping force of viscous damper is limited, which can only adapt to small range of vibration, and the damping capacity of viscous damper is fixed, which is inconvenient to adjust according to the actual damping requirement. UTILITY MODEL CONTENTS

[0004] In order to solve the technical problems of the existing technology that the damping force of viscous damper is limited, only small range of vibration can be adapted, and the damping capacity of viscous damper is fixed, which is inconvenient to adjust according to the actual damping requirement, the utility model provides the following technical scheme.

[0005] The utility model relates to a kind of viscous dampers of friction energy dissipation, including with the upper connecting plate of pipe clamp accessory connection and the lower connecting plate located in the upper connecting plate lower, upper connecting plate lower part is fixedly connected with upper shell, lower connecting plate upper part is fixedly connected with lower shell, sealing sleeve is connected between the upper shell and the lower shell, damping liquid is provided in the lower shell inner cavity, the plunger that the upper connecting plate lower part is fixedly provided is inserted into the damping liquid, adjusting screw is screw-connected on the outer wall of the lower shell, and the end of the adjusting screw close to the plunger is provided with a plurality of elastic bodies that abut against and rub with the lower part of the plunger.

[0006] As a further technical scheme, the plunger is hollow quadrangular structure, and the outer wall of the plunger is abutted with elastic bodies on four sides.

[0007] As a further technical scheme, the end of the adjusting screw located on the outer side of the lower shell is provided with adjusting end, and the outer side of the lower shell is provided with locking sleeve connected with the adjusting screw.

[0008] As a further technical solution, the locking sleeve is a threaded ring threaded with the adjusting screw.

[0009] As a further technical solution, the locking sleeve and the adjusting screw are coated with metal glue, and the locking sleeve and the outer wall of the lower shell are coated with metal glue.

[0010] As a further technical solution, the elastic body is in surface contact or line contact with the outer wall of the plunger.

[0011] The utility model discloses the beneficial effect, the utility model discloses a plurality of elastic bodies are abutted on the outer wall of plunger, and the vibration can be transmitted to the elastic body through plunger when pipeline vibration, and can consume the energy of vibration through the friction loss of elastic body and plunger, improve the working range of vibration reduction to a certain extent, can adapt to more wide vibration frequency working condition. Elastic body is connected with lower shell through adjusting screw, and adjusting screw can move left and right, so that the abutting force of elastic body relative to plunger can be adjusted, and the friction of elastic body and plunger can be adjusted according to actual vibration reduction demand, and then the vibration reduction capacity of viscous damper is adjusted. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the sectional plane structure schematic diagram of the utility model friction energy dissipation viscous damper,

[0013] Figure 2 It is the sectional structure schematic diagram of the utility model friction energy dissipation viscous damper to A-A,

[0014] In the drawing: 1-upper connecting plate;2-upper shell;3-plunger;4-sealing sleeve;5-lower shell;6-adjusting screw;7-elastic body;8-adjusting end;9-locking sleeve;10-lower connecting plate;11-damping liquid. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical scheme and advantage of the utility model more clearly, the following is in combination with the drawing and example, and the utility model is further detailed. It should be understood that the specific examples described here are only used to explain the utility model, and are not used to limit the utility model. It should be explained that the examples in the utility model and the features in the examples can be combined with each other in the case of not conflicting.

[0016] In the description of the utility model, it is understood that the terms "upper", "lower" are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element indicated must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0017] As shown in Figure 1 The utility model discloses a friction energy dissipation viscous damper, including upper connecting plate 1 and the lower connecting plate 10 below upper connecting plate 1, upper connecting plate 1 is connected to the pipe clamp accessory of pipeline, and the lower connecting plate 10 is connected to the fixed steel frame. Upper connecting plate 1 lower part fixedly connected with upper casing 2, and lower connecting plate 10 upper part fixedly connected with lower casing 5, and sealing sleeve 4 is connected between upper casing 2 and lower casing 5, can effectively avoid dust, rainwater and other foreign matters into viscous damper and pollute damping fluid, prolong the service life of viscous damper.

[0018] The lower casing 5 inner chamber is equipped with damping liquid 11, and the lower part of the upper connecting plate 1 is fixedly provided with a plunger 3 extending into the damping liquid 11. When the pipeline vibrates, the vibration is transmitted to the plunger 3 through the upper connecting plate 1. The plunger 3 vibrates and exerts a squeezing and shearing action on the damping liquid 11. The damping liquid 11 generates a counteracting damping force on the plunger 3, so that the viscous damper can reduce the vibration of the pipeline.

[0019] As shown in Figure 1 And Figure 2 As shown in a preferred embodiment, a threaded hole is formed through the outer wall of the lower casing 5. The lower casing 5 is screw-connected with an adjusting screw 6. The adjusting screw 6 can move relative to the inner cavity of the lower casing 5 in the horizontal direction. One end of the adjusting screw 6 close to the plunger 3 is provided with an elastic body 7. The elastic body 7 abuts against the lower part of the plunger 3. The elastic body 7 is made of rubber material or other elastic material. In this embodiment, the number of elastic bodies 7 is four, all of which abut against the plunger 3. Of course, the number of elastic bodies 7 is not limited to four, and can be more. The elastic body 7 and the outer wall of the plunger 3 are in surface contact or line contact. In this embodiment, the plunger 3 and the elastic body 7 are in surface contact. The plunger 3 is a hollow quadrangular structure. The elastic body 7 is a rubber block. The outer wall of the plunger 3 abuts against the elastic body 7 on four sides.

[0020] When the pipeline vibration is transmitted to the plunger 3, the plunger 3 vibrates forward and backward, which generates friction force on the elastic body 7 in the forward and backward directions, and the high temperature generated by the elastic body 7 is transmitted to the damping liquid 11, and the friction force generated by the elastic body 7 on the plunger 3 is the damping force generated on the pipeline, and the damping force and the friction force are opposite to the load force direction of the pipeline vibration, and the vibration energy can be consumed through the friction loss of the elastic body 7 and the plunger 3, and the vibration reduction working range is improved to a certain extent, and the working conditions of smaller displacement and wider vibration frequency can be adapted.

[0021] In a preferred embodiment, the adjusting screw 6 is provided with an adjusting end 8 at one end outside the lower shell 5, and the adjusting end 8 is twisted to rotate the adjusting screw 6 relative to the threaded hole of the lower shell 5 and advance or retreat relative to the plunger 3, so that the pressing force of the elastic body 7 on the plunger 3 changes, and the friction force between the plunger 3 and the elastic body 7 changes when vibrating, so that the friction force of the elastic body 7 and the plunger 3 can be adjusted according to the actual vibration reduction requirement, and the vibration reduction capacity of the viscous damper is adjusted.

[0022] In a preferred embodiment, the lower shell 5 is provided with a locking sleeve 9 connected with the adjusting screw 6, and the locking sleeve 9 is a threaded ring connected with the adjusting screw 6. After the pressing force of the elastic body 7 on the plunger 3 is adjusted, metal glue can be applied between the locking sleeve 9 and the adjusting screw 6, and the metal glue can also be applied between the locking sleeve 9 and the outer wall of the lower shell 5. At this time, the locking sleeve 9 fastens and locks the adjusting screw 6 and the lower shell 5, and prevents the adjusting screw 6 from deviating due to vibration. When it is necessary to adjust the pressing force of the elastic body 7 on the plunger 3, the locking sleeve 9 is heated, and the metal glue is melted. Then, the locking sleeve 9 is twisted to adjust the adjusting screw 6, and then the metal glue is used to fix the locking sleeve 9, the adjusting screw and the lower shell 5.

[0023] The working principle of the utility model is: the pipeline and the pipe clamp accessory are connected on the upper connecting plate 1, when the pipeline vibrates, the vibration is transmitted to the plunger 3 through the upper connecting plate 1, the plunger 3 vibrates to extrude and shear the damping liquid 11, and the damping liquid 11 generates a reverse damping force on the plunger 3; when the plunger 3 vibrates forward and backward, the elastic body 7 in the forward and backward directions generates friction force, the high temperature generated by the elastic body 7 is transmitted to the damping liquid 11, and the friction force generated by the elastic body 7 on the plunger 3 is the damping force generated on the pipeline; because the damping force and the friction force are opposite to the load force direction of the pipeline vibration, the vibration energy can be consumed through the friction loss of the elastic body 7 and the plunger 3, and the vibration reduction working range is improved to a certain extent, and the working conditions of smaller displacement and wider vibration frequency can be adapted. Meanwhile, the pressing force of the elastic body 7 on the plunger 3 can be adjusted, so that the friction force of the elastic body 7 and the plunger 3 can be adjusted according to the actual vibration reduction requirement, and the vibration reduction capacity of the viscous damper is adjusted.

[0024] The preferred specific embodiments and examples of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above-described embodiments and examples, and various changes or equivalent replacements can be made within the knowledge possessed by those skilled in the art without departing from the concept of the present application, therefore, the present application is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application belong to the scope of the present application.

Claims

1. A viscous damper for frictional energy dissipation, comprising an upper connecting plate (1) connected to a pipe clamp accessory and a lower connecting plate (10) located below the upper connecting plate (1), wherein an upper housing (2) is fixedly connected to the lower part of the upper connecting plate (1), and a lower housing (5) is fixedly connected to the upper part of the lower connecting plate (10), a sealing sleeve (4) is connected between the upper housing (2) and the lower housing (5), a damping fluid (11) is provided in the inner cavity of the lower housing (5), and a plunger (3) extending into the damping fluid (11) is fixedly provided at the lower part of the upper connecting plate (1), characterized in that: The outer wall of the lower shell (5) is provided with an adjusting screw (6) through threaded connection, and the end of the adjusting screw (6) close to the plunger (3) is provided with a plurality of elastic bodies (7) abutting and rubbing against the lower part of the plunger (3).

2. The frictionally dissipative viscous damper of claim 1, wherein: The plunger (3) is a hollow quadrangular structure, and the outer wall of the plunger (3) is abutted by elastic bodies (7) on four sides.

3. The frictionally dissipative viscous damper of claim 1, wherein: The end of the adjusting screw (6) located outside the lower shell (5) is provided with an adjusting end (8), and the outer side of the lower shell (5) is provided with a locking sleeve (9) connected with the adjusting screw (6).

4. The frictionally dissipative viscous damper of claim 3, wherein: The locking sleeve (9) is a threaded ring connected with the adjusting screw (6) through threads.

5. The frictionally dissipative viscous damper of claim 4, wherein: Metallic glue is applied between the locking sleeve (9) and the adjusting screw (6) and between the locking sleeve (9) and the outer wall of the lower shell (5).

6. The frictionally dissipative viscous damper of claim 1, wherein: The elastic bodies (7) are in surface contact or line contact with the outer wall of the plunger (3).

Images