CN210920340U

CN210920340U - Pipeline damping vibration attenuation structure

Info

Publication number: CN210920340U
Application number: CN201921568842.1U
Authority: CN
Inventors: 林嘉祥; 林洁
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-09-20
Filing date: 2019-09-20
Publication date: 2020-07-03
Anticipated expiration: 2029-09-20

Abstract

The utility model discloses a pipeline damping vibration attenuation structure, including restraint damping component, particle power consumption component, steel shell body, damping shock absorber, characterized by: the constraint damping member comprises a rubber gasket, a constraint steel plate, fastening wing plates and bolts, wherein the rubber gasket is arranged between the pipeline and the constraint steel plate, and the fastening wing plates are arranged on two sides of the constraint steel plate; the particle energy dissipation component consists of a plurality of particle dampers, the particle dampers are arranged between the constraint steel plate and the outer shell, the particle dampers are closed shells, and damping particles are filled in the inner cavities; the constraint damping member is installed outside the pipeline, and the damping vibration absorber is arranged between the fastening wing plate and the bearing base. The vibration amplitude of the pipeline can be effectively reduced, the fatigue damage of the pipeline and elements is prevented, and the non-stop installation can be realized.

Description

Pipeline damping vibration attenuation structure

Technical Field

The utility model relates to a vibration damper can reduce the pipe-line system vibration, especially can stabilize pipe-line system's operation, guarantees production safety's pipeline damping vibration damping structure.

Background

In petrochemical enterprises, vibration of pipeline systems poses a great threat to safety production. The strong pipe vibration can loosen and break the pipe fittings, especially the pipe connection and the pipe-to-fitting connection, resulting in leakage at low and explosion at high. Therefore, the problem of vibration of the pipeline system is solved, potential safety hazards such as welding line fracture, medium leakage, system shutdown and explosion can be effectively prevented, and the method has great significance for safety production of enterprises. The vibration of the pipeline system is mainly caused by air flow pulsation excitation, pipeline structure resonance, poor dynamic balance of the unit or improper basic design and the like. The pipe vibration damping is mainly realized by controlling the pressure pulsation of fluid in a pipe so that the fluid does not generate resonance, or changing the natural frequency of a pipe system so that the fluid does not generate resonance and the like. Common damping methods are: reasonably arranging pipeline lines, arranging a buffer, installing a pore plate, properly increasing support and the like. The above vibration reduction methods are implemented in a shutdown state or in an overall design stage of the piping system.

In hydraulic pumps that pump media alternately, such as plunger pumps, gear pumps, etc., the instantaneous flow output is a periodic function. Due to the pulsating flow, corresponding pressure pulsations must be induced within the piping associated with the pump. Because the hydraulic system is a closed loop consisting of a motor, a hydraulic pump, valves, auxiliary devices, pipelines and the like, in the closed loop, hydraulic oil in a working state often generates fluid noise due to pressure and flow pulsation, and then is transmitted to a connected support base part through a fluid volume wall to cause vibration so as to form noise propagated by a solid structure.

Particularly, the pulsating pressure output by the high-pressure pump can reach 20MPa, and the pulsating pressure can transmit vibration through a pipeline system under the condition that no corresponding interface shock absorption element exists. Especially, periodic exciting force is formed at the pipe diameter change part, the elbow, the valve and other parts to impact the pipe wall, so that the pipeline vibrates, and the vibrating pipeline can generate acting force on fluid in turn to form fluid-solid coupling vibration. When the frequency of the airflow pulsation is coincident with or close to the natural frequency of the pipeline, resonance is generated, and the pipeline is strongly vibrated. The pipelines are in a strong vibration state for a long time, so that the connection parts among the pipelines and the connection parts of the pipelines and accessories are damaged by fatigue, and potential safety hazards are formed.

The particle damping technology is a damping effect which utilizes particles filled in a limited closed space in a vibration system, utilizes friction and collision among the particles and between the particles and a wall surface to convert mechanical energy into heat energy for dissipation, and obtains the vibration energy of the consumption system.

Disclosure of Invention

In order to reduce pipe-line system's vibration, the utility model provides a passive vibration control's of additional mass formula pipeline damping vibration damping structure takes the natural frequency that pipeline restraint damping changes local pipeline to prevent resonance, through particle power consumption damping technique, turns into the kinetic energy of pipeline into heat energy dissipation to reach and reduce the pipe vibration, protect the pipe connection position, avoid taking place fatigue failure's purpose. The installation without stopping can be realized on the basis of not changing the original pipeline structure. It can effectively reduce the amplitude of the pipeline to a safe operating range far less than 0.4 mm. The installation is convenient and fast.

The utility model provides a technical scheme that its technical problem adopted is: a pipeline damping vibration attenuation structure comprises a constraint damping member, a particle energy dissipation member, a steel outer shell and a damping vibration absorber. The constraint damping component comprises a rubber gasket, a constraint steel plate, fastening wing plates and bolts, wherein the rubber gasket is arranged between the pipeline and the constraint steel plate, and the fastening wing plates are arranged on two sides of the constraint steel plate. The fastening wing plate is symmetrically provided with mounting holes, mounting bolts, and screws, upper nuts and lower nuts on the damping vibration absorbers, so that the rigid constraint force on the pipeline is improved. The pipe vibration is reduced by converting part of the vibration energy into heat energy by constraining the rubber packing between the damping member and the pipe.

The particle energy dissipation component consists of a plurality of particle dampers, the particle dampers are arranged between the constraint steel plate and the outer shell, the particle dampers are closed shells, and damping particles are filled in the inner cavities; the constraint damping member is installed outside the pipeline, and the damping vibration absorber is arranged between the fastening wing plate and the bearing base.

The inner cavity of the particle damper shell is spherical and cylindrical. The particle dampers of the particle energy consumption component are composed of particle dampers with the same shape and specification or particle dampers with different shapes and specifications.

The damping particles comprise steel balls with different particle sizes and metal or nonmetal particles with different mesh numbers. The inner cavity of each particle damper is filled with the same damping particles, and the damping particles with different particle diameters and materials are respectively filled in the inner cavities of different particle dampers according to a certain filling ratio. The steel balls with different grain diameters, the metal or nonmetal particles with different meshes, and different filling proportions have different energy consumption mechanisms for friction and collision generated by vibration with different frequencies and different amplitudes. According to the characteristics of different frequencies, accelerations and amplitudes of pipeline vibration, the damping effect of consuming vibration energy for each vibration frequency can be achieved in a targeted manner by filling steel balls with different particle sizes, metal or nonmetal particles and filling proportions, and the vibration damping frequency band is widened.

The length of the restraint steel plate is more than twice of the outer diameter of the pipeline. The increase of the length of the restraint steel plate can effectively improve the restraint damping effect and reduce the acceleration and the amplitude of the pipeline vibration. Meanwhile, the vibration participating mass of the pipeline damping vibration attenuation structure is increased, the natural frequency of a local pipeline can be changed, and the phenomenon of local pipeline resonance caused by the coincidence of the frequency of airflow pulsation and the natural frequency of the pipeline is effectively avoided.

The pipeline damping vibration attenuation structure is arranged at the horizontal, vertical and elbow positions of the pipeline. The pipeline damping vibration attenuation structure is arranged at the position of the pipeline connecting pipe and the maximum vibration amplitude of the pipeline system, such as the position of an outlet connecting pipe of a high-pressure pump, the position of an elbow of a pipeline and the like, so that the vibration amplitude of the pipeline can be effectively reduced. The lower nut on the screw rod of the rotary damping vibration absorber is used for jacking the fastening wing plate to bear the load of the pipeline damping vibration attenuation structure and the pipeline. The damping vibration absorber is a low-frequency composite rubber vibration absorber. When the vibration of the pipeline is transmitted to the damping vibration absorber, the vibration energy can be converted into heat energy to be consumed, and the vibration transmission to the surrounding environment is reduced. Although the pipeline damping vibration attenuation structure has certain mass, the load of the pipeline damping vibration attenuation structure is borne by the damping vibration absorbers, so that the load of the pipeline is not increased, and the mass and the rigidity of a pipeline system are not changed.

When the cavity is cylindrical, the cylindrical axis should be installed horizontally. When the cavity is cylindrical, the center line of the cylinder should remain horizontal during installation. The reduction of the friction force and the impact force among the damping particles due to the superposition and accumulation of the damping particles and the reduction of the energy consumption effect are avoided.

The utility model has the advantages that:

1. reducing the pulsation output of the hydraulic system through constrained damping;

2. reducing the vibration energy of the pipeline through particle energy consumption;

3. the vibration amplitude is reduced through the integral structure and the damping vibration absorber;

4. the natural frequency of the local pipeline is changed, and the phenomenon of local pipeline resonance caused by the coincidence of the frequency of airflow pulsation and the natural frequency of the pipeline is avoided.

Drawings

The present invention will be further explained with reference to the drawings and examples.

FIG. 1 is a front structural view of a first embodiment of a pipe damping vibration attenuating structure.

Fig. 2 is a side construction view of the first embodiment.

Fig. 3 is a top configuration view of the first embodiment.

Fig. 4 is a top configuration view of the second embodiment.

In the figure, 1, a constraint damping component, 11, a rubber gasket, 12, a constraint steel plate, 13, a fastening wing plate, 14, a bolt, 2, a particle energy dissipation component, 21, a particle damper, 22, a cavity, 3, an outer shell, 4, a damping shock absorber, 5, a pipeline and 6, a bearing base are arranged.

Detailed Description

In a first embodiment shown in fig. 1, 2 and 3, a pipeline damping vibration attenuation structure comprises a constraint damping member (1), a particle energy dissipation member (2), a steel outer shell (3) and a damping vibration absorber (4). The restraint damping member (1) comprises a rubber gasket (11), a restraint steel plate (12), fastening wing plates (13) and bolts (14), wherein the rubber gasket (11) is arranged between the pipeline (5) and the restraint steel plate (12), and the fastening wing plates (13) are arranged on two sides of the restraint steel plate (12); the particle energy dissipation component (2) consists of a plurality of particle dampers (21) and is arranged between the constraint steel plate (12) and the steel outer shell (3), the particle dampers (21) are closed shells, and damping particles are filled in the inner cavities (22); the restraining damping member (1) is mounted outside the pipeline (5), and the damping vibration absorber (4) is arranged between the fastening wing plate (13) and the bearing base (6).

The inner cavity (22) of the shell of the particle damper (21) is spherical and cylindrical. The particle dampers (21) of the particle energy consumption component (2) are composed of particle dampers (21) with the same shape and specification or particle dampers (21) with different shapes and specifications.

The damping particles comprise steel balls with different particle sizes and metal or nonmetal particles with different mesh numbers. The same damping particles are filled in the inner cavity of each particle damper (21), and the damping particles with different particle diameters and materials are respectively filled in the inner cavities (22) of different particle dampers (21) according to a certain filling ratio.

The length of the restraint steel plate (12) is more than twice of the outer diameter of the pipeline (5).

The pipeline damping vibration attenuation structure is arranged at the horizontal, vertical and elbow positions of the pipeline (5). The fastening wing plate (13) is symmetrically provided with mounting holes, mounting bolts (14), and screw rods, upper nuts and lower nuts on the damping vibration absorbers (4). The lower nut on the screw of the rotary damping vibration absorber (4) is used for jacking the fastening wing plate (13) to bear the load of the pipeline damping vibration attenuation structure and the pipeline (5).

In the second embodiment shown in fig. 4, the cavity (22) is cylindrical, and the cylindrical axis is horizontally arranged.

It will be appreciated that various changes can be made to the embodiments described above without departing from the scope of the invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a pipeline damping vibration attenuation structure, includes restraint damping member, particle power consumption component, steel shell body, damping shock absorber, characterized by: the constraint damping member comprises a rubber gasket, a constraint steel plate, fastening wing plates and bolts, wherein the rubber gasket is arranged between the pipeline and the constraint steel plate, and the fastening wing plates are arranged on two sides of the constraint steel plate; the particle energy dissipation component consists of a plurality of particle dampers, the particle dampers are arranged between the constraint steel plate and the outer shell, the particle dampers are closed shells, and damping particles are filled in the inner cavities; the constraint damping member is installed outside the pipeline, and the damping vibration absorber is arranged between the fastening wing plate and the bearing base.

2. The pipe damping structure as set forth in claim 1, wherein: the inner cavity of the particle damper shell is spherical and cylindrical.

3. The pipe damping structure as set forth in claim 1, wherein: the particle dampers of the particle energy consumption component are composed of particle dampers with the same shape and specification or particle dampers with different shapes and specifications.

4. The pipe damping structure as set forth in claim 1, wherein: the damping particles comprise steel balls with different particle sizes and metal or nonmetal particles with different mesh numbers.

5. The pipe damping structure as set forth in claim 1, wherein: the inner cavity of each particle damper is filled with the same damping particles, and the damping particles with different particle diameters and materials are respectively filled in the inner cavities of different particle dampers according to a certain filling ratio.

6. The pipe damping structure as set forth in claim 1, wherein: the length of the restraint steel plate is more than twice of the outer diameter of the pipeline.

7. The pipe damping structure as set forth in claim 1, wherein: the pipeline damping vibration attenuation structure is arranged at the horizontal, vertical and elbow positions of the pipeline.

8. The pipe damping structure as set forth in claim 1, wherein: the lower nut on the screw rod of the rotary damping vibration absorber is used for jacking the fastening wing plate to bear the load of the pipeline damping vibration attenuation structure and the pipeline.

9. The pipe damping structure as set forth in claim 1, wherein: when the cavity is cylindrical, the cylindrical axis should be installed horizontally.