CN110159862B - Self-adjusting magnetorheological damper for damping vibration of pipeline - Google Patents
Self-adjusting magnetorheological damper for damping vibration of pipeline Download PDFInfo
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- CN110159862B CN110159862B CN201910481680.6A CN201910481680A CN110159862B CN 110159862 B CN110159862 B CN 110159862B CN 201910481680 A CN201910481680 A CN 201910481680A CN 110159862 B CN110159862 B CN 110159862B
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- magnetic shield
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- permanent magnet
- spring
- adjusting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/53—Means for adjusting damping characteristics by varying fluid viscosity, e.g. electromagnetically
- F16F9/535—Magnetorheological [MR] fluid dampers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/02—Energy absorbers; Noise absorbers
- F16L55/033—Noise absorbers
- F16L55/035—Noise absorbers in the form of specially adapted hangers or supports
Abstract
The invention discloses a self-adjusting magneto-rheological damper for damping vibration of a pipeline, which comprises an upper pipe clamp, a lower pipe clamp, a piston rod, a cylinder cover, a damper cylinder, a magnetic shield, a spring upper pressure plate, a self-adjusting spring, a spring lower pressure plate, a permanent magnet, a magnetic shield sealing cover, a magnetic shield and magneto-rheological damping fluid, wherein the upper pipe clamp is arranged on the upper end of the cylinder cover; the self-adjusting magneto-rheological damper is applied to vibration reduction of pipelines of petroleum and petrochemical industry, high temperature and high pressure, oil and gas transportation and flammable and explosive media, and compared with an actively controlled magneto-rheological damper and other self-adjusting magneto-rheological dampers, the self-adjusting magneto-rheological damper has the advantages of simple structure, convenience in disassembly and assembly, no complex threading and control part, single equipment failure point, convenience in maintenance and cost saving. According to the Newton's first law and the Hooke's law, the permanent magnet stretches out and draws back in the closed magnetic shield along with the vibration of the pipeline, and because the volume of the permanent magnet exposed out of the magnetic shield is different, the magnetic induction intensity exposed out of the magnetic shield is different, so that the damping size of the magneto-rheological damper is changed, and the vibration damping function of the pipeline is realized.
Description
The technical field is as follows:
the patent relates to a device applied to pipeline vibration reduction, in particular to a self-adjusting magneto-rheological damper for pipeline vibration reduction of a petroleum and petrochemical high-temperature and high-pressure oil and gas transmission pipeline.
Background art:
the stability of the lines in the installations using pumps and compressors, in particular in installations for conveying high temperatures, high pressures, flammable and explosive substances, directly affects the normal production and operation of the entire plant. The severe vibration of the pipeline can bury hidden troubles in the stable operation of the compressor, and the generated reciprocating inertia force can cause the fatigue damage of the local part of the pipeline, thereby causing the problems of pipeline breakage, medium leakage and the like. The additional thrust that the vibration produced can cause the equipment harm, influences the safety in production and the economic benefits of enterprise, can lead to the emergence of accident even when serious, causes harm and loss to the life and property. Therefore, the vibration reduction of the pipeline is an important subject in high-temperature and high-pressure oil and gas transportation of petroleum and petrochemical industry, wherein the magnetorheological damper can effectively solve the problems, and the magnetorheological damper is a research hotspot in a pipeline vibration reduction device due to quick vibration reduction reaction and high precision.
In the prior art, the magneto-rheological damper has some defects, for example, chinese patent document No. 201710513449.1 discloses a magneto-rheological damper with adjustable damping, the magneto-rheological damper in the scheme has a complicated mechanical structure and installation, and has high precision requirement, and faults such as locking of an adjusting knob and the like easily occur when the damping of the damper is adjusted.
The invention content is as follows:
the invention aims to provide a self-adjusting magneto-rheological damper for damping vibration of a pipeline, which has a simple structure and strong practicability.
The invention discloses a self-adjusting magneto-rheological damper for damping vibration of a pipeline, which is characterized by comprising an upper pipe clamp, a lower pipe clamp, a piston rod, a cylinder cover, a damper cylinder, a magnetic shield, an upper spring pressing plate, a self-adjusting spring, a lower spring pressing plate, a permanent magnet, a sealing cover of the magnetic shield, a magnetic shield and magneto-rheological damping fluid;
the upper pipe clamp and the lower pipe clamp are connected through a bolt, the piston rod is in threaded connection with the lower pipe clamp and is positioned through a pin, a sealing part is arranged between the piston rod and the cylinder cover of the upper opening of the damper cylinder body, the magnetic shield, the upper spring pressure plate, the self-adjusting spring, the lower spring pressure plate, the permanent magnet, the magnetic shield sealing cover and the magnetic shield are arranged in the damper cylinder body, and the magnetorheological damping liquid is filled in the damper cylinder body;
the piston rod is flexibly connected with the permanent magnet through the self-adjusting spring and is positioned through the upper spring pressing disc and the lower spring pressing disc;
the piston magnetism isolating cover is in threaded connection with the magnetism isolating cover sealing cover, the magnetism isolating cover sealing cover is sealed with the permanent magnet, and the permanent magnet is in bolted connection with the magnetism isolating disc.
According to the technical scheme provided by the method, the self-adjusting magnetorheological damper for damping the vibration of the pipeline has the advantages that the upper pipe clamp and the lower pipe clamp are connected through the bolt to clamp the pipeline, and the lower pipe clamp is in threaded connection with the piston rod. The piston rod penetrates through the magnetism isolating cover to be in threaded connection, and the magnetism isolating cover is in threaded connection with the magnetism isolating cover sealing cover. Two sides of the self-adjusting spring are respectively arranged on the magnetism isolating cover and the permanent magnet, the looseness of the magnetism isolating cover and the permanent magnet is prevented through the upper spring pressing plate and the lower spring pressing plate, and the magnetism isolating plate and the permanent magnet are connected through bolts. Because the permanent magnet and the magnetism isolating cover are flexibly connected through the self-adjusting spring, the permanent magnet adjusts the exposed volume of the permanent magnet separated from the magnetism isolating cover according to the vibration condition of the pipeline, and the magnetic field in the damper is changed so as to change the damping force. The damper realizes the self-modulation damping function of the magneto-rheological damper on the premise of relatively simple structure, and has better economic practicability.
Drawings
FIG. 1 is a cross-sectional view of a damper for damping vibration in a pipe according to an embodiment of the present invention;
FIG. 2 is a partial, polished view of an embodiment of the invention;
FIG. 3 is an exploded view of the self-adjusting damper of an embodiment of the present invention;
in the figure:
1-upper pipe clamp, 2-lower pipe clamp, 3-piston rod, 4-cylinder cover, 5-damper cylinder, 6-magnetism isolating cover, 7-upper spring pressure plate, 8-self-adjusting spring, 9-lower spring pressure plate, 10-permanent magnet, 11-magnetism isolating cover sealing cover, 12-magnetism isolating plate, and 13-magneto-rheological damping liquid.
Detailed description of the preferred embodiments
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. Details which are not described in detail in the embodiments of the invention belong to the prior art which is known to the person skilled in the art.
The invention relates to a self-adjusting magneto-rheological damper for damping vibration of a pipeline, which has the preferred specific implementation mode that:
the magnetic isolation damper comprises an upper pipe clamp, a lower pipe clamp, a piston rod, a cylinder cover, a damper cylinder, a magnetic isolation cover, a spring upper pressure plate, a self-adjusting spring, a spring lower pressure plate, a permanent magnet, a magnetic isolation cover sealing cover, a magnetic isolation disc and magnetorheological damping fluid;
the upper pipe clamp and the lower pipe clamp are connected through a bolt, the piston rod is in threaded connection with the lower pipe clamp and is positioned through a pin, a sealing part is arranged between the piston rod and the cylinder cover of the upper opening of the damper cylinder body, the magnetic shield, the upper spring pressure plate, the self-adjusting spring, the lower spring pressure plate, the permanent magnet, the magnetic shield sealing cover and the magnetic shield are arranged in the damper cylinder body, and the magnetorheological damping liquid is filled in the damper cylinder body;
the piston rod is flexibly connected with the permanent magnet through the self-adjusting spring and is positioned through the upper spring pressing disc and the lower spring pressing disc;
the piston magnetism isolating cover is in threaded connection with the magnetism isolating cover sealing cover, the magnetism isolating cover sealing cover is sealed with the permanent magnet, and the permanent magnet is in bolted connection with the magnetism isolating disc.
According to the vibration condition of the piston rod, the exposed surface area of the permanent magnet from the magnetism isolating cover is adjusted through the reciprocating motion of the self-adjusting spring, so that the magnetic field is automatically changed, and the damping force is adjusted.
The permanent magnet and the magnetism isolating cover are connected through a flexible telescopic structure of the self-adjusting spring, and when different vibration of the pipeline is realized through the self-adjusting spring, the permanent magnet can generate different exposed areas in the magnetism isolating cover, so that the damping force is changed, and the function of vibration reduction is realized.
The specific embodiment is as follows:
as shown in fig. 1, the damper comprises an upper pipe clamp 1, a lower pipe clamp 2, a piston rod 3, a cylinder cover 4, a damper cylinder 5, a magnetic shield 6, a spring upper pressure plate 7, a self-adjusting spring 8, a spring lower pressure plate 9, a permanent magnet 10, a magnetic shield sealing cover 11, a magnetic shield 12 and magnetorheological damping fluid 13.
Wherein the upper pipe clamp 1 and the lower pipe clamp 2 are connected through bolts to clamp the pipeline. And the lower pipe clamp 2 and the piston rod 3 are connected by screw thread and are positioned by the positioning pin.
The damper cylinder 5 is a cylindrical cylinder with a hollow interior, and is connected and sealed with the cylinder cover 4 through screws. The hollow part of the cylinder stores flowing magneto-rheological damping fluid 13 and parts which reciprocate therein.
The parts reciprocating in the cylinder are also the most important parts for generating damping force. Which comprises the following steps: the magnetic shield comprises a magnetic shield 6, an upper spring pressure plate 7, a self-adjusting spring 8, a lower spring pressure plate 9, a permanent magnet 10, a magnetic shield sealing cover 11 and a magnetic shield disc 12.
The piston rod 3 needs the assistance of a sealing piece when passing through the barrel cover 4 to do reciprocating motion, and the functions of dust prevention, sealing and guiding are completed.
One end of the piston rod 4 is connected with the magnetism isolating cover 6 through threads and is locked by a nut, and meanwhile, the nut also plays a role in guiding and pressing the spring upper pressing plate 7 and the inside of the magnetism isolating cover 6, so that the self-adjusting spring 8 is prevented from loosening and falling.
The connection and looseness prevention of the self-adjusting spring 8, the magnetism isolating cover 6 and the permanent magnet 10 are as follows: the initial angle of the two ends of the self-adjusting spring 8 is 0 degree, so that the self-adjusting spring has sufficient area to be tightly embedded into the inner grooves of the magnetism isolating cover 6 and the permanent magnet 10. In order to prevent the spring from loosening from the inner groove, the self-adjusting spring plays a role in flexible connection between the magnetism isolating cover and the permanent magnet through self-adjusting the pressure of the upper pressure plate, the lower pressure plate and the pressure plate 9 of the spring. Meanwhile, a guide structure is arranged in the magnetism isolating cover to ensure the linear reciprocating motion of the permanent magnet. The upper gland 7 is locked by a nut and a magnetic shield, and the lower gland 9 is locked by a screw and a permanent magnet.
The magnetic shield 6 is connected with the magnetic shield sealing cover 11 through threads, and a sealing environment with a certain space in the magnetic shield 6 is formed through dynamic sealing between the magnetic shield 6 and the permanent magnet 10 and reciprocates in the magnetic shield.
As shown in fig. 2; the lower end of the permanent magnet 10 is connected with a magnetic isolation disc 12 through a screw, and the magnetic isolation disc 12 is used for preventing excessive magnetic particles from being adsorbed on the permanent magnet 10 to cause local condensation. The screw for connecting the permanent magnet 10 and the magnetism isolating disc 12 is made of a hexagon socket head cap screw made of martensitic stainless steel, and the martensitic stainless steel has a certain magnetic conduction effect and also has the function of preventing the magneto-rheological damping fluid 13 from settling.
The permanent magnet 10 will do reciprocating motion in the magnetism isolating cover 6 along with the random vibration of the pipeline, and the damping size of the magneto-rheological damping liquid 13 is changed. For example, when the amplitude of the pipeline is large, the volume of the permanent magnet 10 exposed out of the magnetism isolating cover 6 is large, the exposed magnetic field is strong, the viscosity of the damping fluid is large, and the damping force is large. Similarly, when the amplitude of the pipeline is small, the volume of the permanent magnet 10 exposed out of the magnetism isolating cover 6 is small, the exposed magnetic field is weak, the viscosity of the damping fluid is reduced, and the damping force is small.
The working principle is as follows:
the invention is applied to vibration reduction of pipeline vibration of high-temperature and high-pressure flammable and explosive gas or liquid in petroleum and petrochemical transportation, when the magnetorheological damper is assembled, the pipeline is clamped by the pipe clamp, and the bottom of the damper is fixed with the ground through the bolt. Simple structure need not to connect the peripheral hardware, realizes along with the advantage of pipeline random vibration displacement follow-up regulation magnetorheological damping, and its theory of operation is as follows:
the energy generated by the vibration of the pipeline can be transmitted to the self-adjusting magneto-rheological damper through the clamping of the pipe clamp on the pipeline, and the flexible connection permanent magnet 10 can do reciprocating motion with different amplitudes in the magnetic shield 6 according to the vibration of the pipeline. According to different vibration of the pipeline, the permanent magnet 10 can generate different exposed areas in the magnetic shield 6, so that the viscosity of the magnetorheological damping fluid 13 is changed, the damping force of the damper is changed, and the self-adjusting function of the magnetorheological damper is realized.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (1)
1. A self-adjusting magneto-rheological damper for damping vibration of a pipeline is characterized by comprising an upper pipe clamp, a lower pipe clamp, a piston rod, a cylinder cover, a damper cylinder, a magnetic shield, a spring upper pressure plate, a self-adjusting spring, a spring lower pressure plate, a permanent magnet, a magnetic shield sealing cover, a magnetic shield disc and magneto-rheological damping fluid;
the upper pipe clamp and the lower pipe clamp are connected through a bolt, the piston rod is in threaded connection with the lower pipe clamp and is positioned through a pin, the piston rod penetrates through a cylinder cover at the upper opening of the damper cylinder, a sealing part is arranged between the piston rod and the cylinder cover, the magnetic shield, the upper spring pressure plate, the self-adjusting spring, the lower spring pressure plate, the permanent magnet, the magnetic shield sealing cover and the magnetic shield are arranged in the damper cylinder, and the magnetorheological damping fluid is filled in the damper cylinder;
the piston rod is flexibly connected with the permanent magnet through the self-adjusting spring and is positioned through the upper spring pressing disc and the lower spring pressing disc;
the magnetic shield is in threaded connection with the magnetic shield sealing cover, the magnetic shield sealing cover is sealed with the permanent magnet, and the permanent magnet is in bolted connection with the magnetic shield disc;
one end of the piston rod is connected with the magnetism isolating cover through threads and the nut is locked, and meanwhile, the nut also plays a role in guiding and pressing an upper pressure plate of the spring and the inside of the magnetism isolating cover to prevent the self-adjusting spring from loosening and falling;
the upper spring pressure plate is locked with the magnetic shield through a nut, and the lower spring pressure plate is locked with the permanent magnet through a screw;
according to the vibration condition of the piston rod, the exposed surface area of the permanent magnet from the magnetism isolating cover is adjusted through the reciprocating motion of the self-adjusting spring, so that the magnetic field is automatically changed, and the damping force is adjusted;
the permanent magnet and the magnetism isolating cover are connected through a flexible telescopic structure of the self-adjusting spring, and when different vibration of the pipeline is realized through the self-adjusting spring, the permanent magnet can generate different exposed areas in the magnetism isolating cover, so that the damping force is changed, and the function of vibration reduction is realized.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910481680.6A CN110159862B (en) | 2019-06-04 | 2019-06-04 | Self-adjusting magnetorheological damper for damping vibration of pipeline |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910481680.6A CN110159862B (en) | 2019-06-04 | 2019-06-04 | Self-adjusting magnetorheological damper for damping vibration of pipeline |
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| CN110159862A CN110159862A (en) | 2019-08-23 |
| CN110159862B true CN110159862B (en) | 2020-11-27 |
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| CN201910481680.6A Active CN110159862B (en) | 2019-06-04 | 2019-06-04 | Self-adjusting magnetorheological damper for damping vibration of pipeline |
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| CN113236523B (en) * | 2021-05-11 | 2022-03-15 | 浙江威邦机电科技有限公司 | Wireless low-noise water pump |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62184255A (en) * | 1986-02-10 | 1987-08-12 | Yakumo Kogyo Kk | Vibration isolating device |
| CN102943838B (en) * | 2012-11-23 | 2015-02-18 | 株洲时代新材料科技股份有限公司 | Base vibration isolation device with spring and magnetic fluid |
| CN104976271B (en) * | 2015-07-15 | 2017-04-05 | 安徽工程大学 | It is suitable to the damping adjustment device of MR damper |
| CN105650350B (en) * | 2016-03-30 | 2017-10-03 | 江苏科技大学 | The pipeline elevator that a kind of vibration shock isolation is hit |
| CN105952975B (en) * | 2016-07-10 | 2018-01-19 | 北京工业大学 | A kind of magneto-rheological vibration damping pipe clamp |
| CN208831895U (en) * | 2018-08-09 | 2019-05-07 | 南通恒利洋金属制品有限公司 | A kind of effective combined pipeline component of combustion gas |
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Address after: 102600 Beijing Daxing District Huangcun Qingyuan Road No. 19 Patentee after: Beijing Institute of Petrochemical Technology Patentee after: Suzhou aoxingmingyu Technology Co., Ltd Address before: 102600 Beijing Daxing District Huangcun Qingyuan Road No. 19 Patentee before: Beijing Institute of Petrochemical Technology Patentee before: Beijing Xing'an Mingyu Technology Co., Ltd |