CN111457187B - Pipeline vibration damper and configuration method thereof - Google Patents
Pipeline vibration damper and configuration method thereof Download PDFInfo
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- CN111457187B CN111457187B CN202010385404.2A CN202010385404A CN111457187B CN 111457187 B CN111457187 B CN 111457187B CN 202010385404 A CN202010385404 A CN 202010385404A CN 111457187 B CN111457187 B CN 111457187B
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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
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Abstract
The invention relates to a pipeline vibration damper and a configuration method thereof, the pipeline vibration damper comprises a plurality of bottom plates, wherein the bottom plates are sequentially hinged end to end through hinges to form a long chain, the long chain is wound on a pipeline, the bottom plates positioned at the two ends of the long chain are respectively hinged with an L-shaped connecting plate through hinges, and the opposite end surfaces of the two L-shaped connecting plates are respectively provided with holes and are connected through bolts. And the outer end face of each bottom plate is movably connected with a frequency-adjustable vibration absorption unit for absorbing vibration. The pipeline vibration damping device is simple in structure, the vibration absorbing vibrator is movably connected with the bottom plate, and the two L-shaped connecting plates are movably connected, so that the pipeline vibration damping device is convenient to install. The frequency of the absorption vibrator is adjustable, so that the vibration of a connecting pipeline of the synchronous phase modulator can be inhibited, and the long-term stable use of the pipeline is ensured. The pipeline vibration damper can also be popularized and applied to the suppression of the vibration of pipelines of different types and with various frequencies.
Description
Technical Field
The invention belongs to the technical field of pipeline vibration prevention, and particularly relates to a pipeline vibration damping device and a configuration method thereof.
Background
Large rotating equipment such as synchronous phase modulators, steam turbines, generators, pumps and the like can generate vibration under the working state, and the vibration can be transmitted to pipelines connected with the large rotating equipment. Although the design takes into account the vibration of the rotating equipment and the effect of the unstable flow of the fluid on the pipeline, the vibration may exceed the standard in some cases, and in such cases, if the spatial structure of the pipeline or the bearing support and hanger are systematically changed, the pipeline reconstruction needs to be stopped. The pipeline reconstruction engineering quantity is large, the construction period is long, the requirement on the maintenance of system equipment during shutdown is high, and the cost is high.
Disclosure of Invention
The invention provides a pipeline vibration damping device which is simple in structure and convenient to install, and meanwhile, the invention also provides a configuration method of the pipeline vibration damping device.
The technical scheme adopted by the invention is as follows:
a pipeline vibration damper comprises a plurality of bottom plates, wherein the bottom plates are sequentially hinged end to end through hinges to form a long chain, the long chain is wound on a pipeline, the bottom plates at two ends of the long chain are respectively hinged with an L-shaped connecting plate through hinges, opposite end faces of the two L-shaped connecting plates are respectively provided with holes and are connected through bolts, and the long chain is fixed with the pipeline; and a frequency-adjustable vibration absorption unit for absorbing vibration is detachably fixed on the outer end face of each bottom plate.
Further, the vibration absorption unit comprises a box body, a flange plate, a top plate, a first spring, a second spring, a screw and a steel ball;
the box body is of a cylindrical structure which is communicated up and down and is coaxially fixed on the upper end surface of the flange plate; the second spring, the steel ball and the first spring are sequentially welded from top to bottom, a cylindrical protrusion matched with the inner diameter of the first spring is integrally arranged in the middle of the upper end face of the flange plate, and the bottom of the first spring is inserted into the cylindrical protrusion; the top plate is coaxially fixed at the top of the box body, the second spring is provided with an internal thread matched with the screw rod, the screw rod penetrates through the top plate from top to bottom and is screwed into the second spring, and the upper end of the screw rod is fixed through a locking nut; the flange plate is located a plurality of mounting holes are evenly formed in the outer side of the box body along the circumferential direction, screw holes are correspondingly formed in the bottom plate, and the suction vibrator is fixed on the bottom plate through screws.
Furthermore, a circle of groove is formed in the inner side face of the box body, and a damping sleeve is arranged in the groove; the upper part and the lower part of the steel ball are respectively and uniformly fixedly connected with a plurality of connecting rods along the circumferential direction, and the connecting rods are in one-to-one correspondence from top to bottom; each connecting rod is at a set angle with the horizontal plane, and the tail end of each connecting rod is fixedly connected with a damping ball in friction contact with the damping sleeve.
Further, the set angle is 45 °.
A method for configuring a pipe vibration damper comprises the following steps:
step S1, determining the position of the pipeline with the vibration exceeding the standard, and determining the vibration of the pipeline by using an acceleration sensor to obtain the amplitude and frequency parameters of the pipeline vibration;
step S2, determining the frequency of the whole pipeline vibration damping device according to the frequency parameters of the pipeline, and achieving the vibration damping effect when the vibration frequency of the pipeline is equal to the natural frequency of the pipeline vibration damping device, wherein the vibration frequency of the pipeline measured in the step S1 is the total frequency of the pipeline vibration damping device consisting of all the absorption vibrators;
s3, selecting the type and the number of the absorption vibrators according to the perimeter of the pipeline and the total frequency of the pipeline vibration damper, ensuring that the pipeline vibration damper can be connected into a whole circumference of the pipeline, and simultaneously ensuring that the difference between the total frequency of the pipeline vibration damper and the vibration frequency of the pipeline is not more than 5%;
step S4, mounting the pipe damper determined through the above steps S1 to S3 on the pipe, and detecting whether the pipe amplitude after mounting the pipe damper satisfies the setting requirement, if not, repeating the above steps S1 to S4.
Further, in step S1, when the amplitude and the frequency are measured, a plurality of measurements are performed to control the measurement error.
Further, in step S4, the setting request is: the pipe amplitude after the pipe vibration damper is installed must not exceed 20% of the pipe amplitude measured in step S1.
The invention has the beneficial effects that:
the pipeline vibration damping device is simple in structure, the vibration absorbing vibrator is movably connected with the bottom plate, and the two L-shaped connecting plates are movably connected, so that the pipeline vibration damping device is convenient to install. The frequency of the absorption vibrator is adjustable, so that the vibration of a connecting pipeline of the synchronous phase modulator can be inhibited, and the long-term stable use of the pipeline is ensured.
The pipeline vibration damper can also be popularized and applied to the suppression of the vibration of pipelines of different types and with various frequencies.
Drawings
FIG. 1 is a schematic structural view of a pipe damper of the present invention;
FIG. 2 is a schematic view of a connection structure between the absorption vibrator and the bottom plate;
FIG. 3 is a schematic structural diagram of a suction vibrator;
FIG. 4 is a flow chart of a method of configuring a pipe damping device;
reference numerals: the vibration absorber comprises a pipeline 1, a bottom plate 2, a hinge 3, a vibration absorber 4, a box 401, a flange 402, a mounting hole 4021, a cylindrical protrusion 4022, a top plate 403, a first spring 404, a second spring 405, a screw 406, a steel ball 407, a connecting rod 408, a damping ball 409, a damping sleeve 410, a connecting plate 5-L, a bolt 6 and a screw 7.
Detailed Description
The pipe vibration damping device and the method of configuring the same according to the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, a pipeline vibration damper comprises a plurality of bottom plates 2, wherein the bottom plates 2 are hinged end to end sequentially through hinges 3 to form a long chain, the long chain is wound on a pipeline 1, the bottom plates 2 at the two ends of the long chain are respectively hinged with an L-shaped connecting plate 5 through the hinges 3, the opposite end faces of the two L-shaped connecting plates 5 are respectively provided with holes and are connected through bolts 6, and the long chain is fixed on the pipeline 1. And a vibration absorption unit 4 which is used for absorbing vibration and has adjustable frequency is detachably fixed on the outer end face of each bottom plate 2.
Specifically, as shown in fig. 2 and 3, the vibration absorber 4 includes a case 401, a flange 402, a top plate 403, a first spring 404, a second spring 405, a screw 406, and a steel ball 407. The case 401 is a vertically penetrating cylindrical structure and is coaxially fixed to the upper end surface of the flange 402. The second spring 405, the steel ball 407 and the first spring 404 are sequentially welded from top to bottom, a cylindrical protrusion 4022 matched with the inner diameter of the first spring 404 is integrally arranged in the middle of the upper end face of the flange 402, and the bottom of the first spring 404 is inserted into the cylindrical protrusion 4022. The top plate 403 is coaxially fixed on the top of the box 401 through a screw, the second spring 405 is provided with an internal thread matched with the screw 406, the screw 406 penetrates through the top plate 403 from top to bottom and is screwed into the second spring 405, and the upper end of the screw 406 is fixed through a locking nut. A plurality of mounting holes 4021 are uniformly formed in the flange plate 402 at the outer side of the box 401 along the circumferential direction, screw holes are correspondingly formed in the bottom plate 2, and the vibration absorbers 4 are fixed on the bottom plate 2 through screws 7.
A circle of groove is formed in the inner side face of the box body 401, and a damping sleeve 410 is arranged in the groove. The upper part and the lower part of the steel ball 407 are respectively and uniformly fixedly connected with a plurality of connecting rods 408 along the circumferential direction, and the connecting rods 408 are in one-to-one correspondence up and down. Each connecting rod 408 forms a set angle with the horizontal plane, and the end of each connecting rod 408 is fixedly connected with a damping ball 409 in frictional contact with a damping sleeve 410. In the present embodiment, the set angle is 45 °.
The connecting rod 408 is made of an elastic steel plate, the damping ball 409 is made of steel, and two ends of the connecting rod 408 are respectively connected with the steel ball 407 and the damping ball 409 in a welding mode. Damping sleeve 410 is made of rubber.
The absorber 4 includes two vibration damping means: 1. the vertical displacement of the steel ball 407 causes the two springs to stretch and compress creating damping. 2. Damping ball 409 moves up and down and generates damping by rubbing against damping sleeve 410. The two vibration damping means are mutually matched, energy is consumed, and the vibration damping range of the vibration absorbing device 4 can be enlarged.
The frequency adjustment principle of the absorber 4 is as follows: when the frequency is adjusted, the locking nut is loosened, and then the screw 406 is rotated to change the effective working length of the second spring 405, so that the frequency parameter of the absorption vibrator 4 is adjusted in a stepless manner. Assuming that the original length of the second spring 405 is l, the length of the screw 406 screwed into the second spring 405 is a, and the original stiffness of the first spring 404 and the second spring 405 are both k1Then, after the screw 406 is screwed into the second spring 405, the rigidity of the second spring 405 becomes
Overall stiffness of the two springs and the steel ball 407
If the mass of the steel ball is m, the natural frequency of the vibrator is absorbed
After the frequency adjustment is completed, the screw 406 is fastened through the locking nut, and the fastening stability can be ensured by adopting double nuts. The frequency adjusting mode of the vibration absorption device 4 is simple, vibration of various frequencies can be effectively inhibited, and the vibration absorption device plays a role in vibration reduction.
The pipeline vibration damping device can adapt to various pipeline diameters by increasing or decreasing the connecting number of the base plates 2 and the number of the vibration absorbers 4, adapts to different vibration conditions, and has strong applicability. The vibration absorption body 4, the bottom plate 2 and the L-shaped connecting plate 5 are assembled through the hinge 3, the bolt 6 or the screw 7, the assembly and disassembly are simple, and the installation and debugging are convenient.
The size of the absorption vibrator 4 can be various different models, and correspondingly, the bottom plate 2 also has various length sizes matched with the absorption vibrators 4 of different models, which is shown in fig. 1.
As shown in fig. 4, a method for configuring a pipe vibration damper includes the following steps:
and step S1, determining the position of the pipeline 1 with the vibration exceeding the standard, and determining the vibration of the pipeline 1 by using an acceleration sensor to obtain the vibration amplitude and frequency parameters of the pipeline 1. When measuring amplitude and frequency, multiple measurements are made to control measurement error.
And S2, determining the frequency of the whole pipeline vibration damping device according to the frequency parameters of the pipeline 1, achieving a vibration damping effect when the vibration frequency of the pipeline is equal to the natural frequency of the pipeline vibration damping device, wherein the vibration frequency of the pipeline measured in the step S1 is the total frequency of the pipeline vibration damping device consisting of all the suction vibrators 4.
And step S3, selecting the type and the number of the absorption vibrators 4 according to the perimeter of the pipeline 1 and the total frequency of the pipeline vibration damper, ensuring that the pipeline vibration damper can be connected into a whole circumference of the pipeline, and simultaneously ensuring that the difference between the total frequency of the pipeline vibration damper and the vibration frequency of the pipeline 1 is not more than 5%.
Step S4, mounting the pipe damper determined in the above steps S1 to S3 on the pipe 1, and detecting whether the amplitude of the pipe 1 after mounting the pipe damper satisfies a set requirement: the amplitude of the pipe 1 after the pipe damper is installed should not exceed 20% of the amplitude of the pipe 1 measured in step S1. If not, repeating the above steps S1 to S4.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any alternative or alternative method that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the scope of the present invention.
Claims (6)
1. A pipeline vibration damper is characterized by comprising a plurality of bottom plates (2), wherein the bottom plates (2) are sequentially hinged end to end through hinges (3) to form a long chain, the long chain is wound on a pipeline (1), the bottom plates (2) positioned at two ends of the long chain are respectively hinged with an L-shaped connecting plate (5) through the hinges (3), opposite end faces of the two L-shaped connecting plates (5) are respectively provided with holes and are connected through bolts (6), and the long chain is fixed with the pipeline (1); the outer end face of each bottom plate (2) is detachably fixed with a vibration absorption unit (4) which is used for absorbing vibration and has adjustable frequency;
the vibration absorption element (4) comprises a box body (401), a flange plate (402), a top plate (403), a first spring (404), a second spring (405), a screw (406) and a steel ball (407);
the box body (401) is of a cylindrical structure which is penetrated up and down and is coaxially fixed on the upper end surface of the flange plate (402); the second spring (405), the steel ball (407) and the first spring (404) are sequentially welded from top to bottom, a cylindrical protrusion (4022) matched with the inner diameter of the first spring (404) is integrally arranged in the middle of the upper end face of the flange plate (402), and the bottom of the first spring (404) is inserted into the cylindrical protrusion (4022); the top plate (403) is coaxially fixed at the top of the box body (401), the second spring (405) is provided with an internal thread matched with the screw rod (406), the screw rod (406) penetrates through the top plate (403) from top to bottom and is screwed into the second spring (405), and the upper end of the screw rod (406) is fixed through a locking nut; the flange plate (402) is located at the outer side of the box body (401) and is evenly provided with a plurality of mounting holes (4021) along the circumferential direction, the bottom plate (2) is correspondingly provided with screw holes, and the suction vibrator (4) is fixed on the bottom plate (2) through a screw (7).
2. The pipe vibration damper according to claim 1, characterized in that a circle of groove is formed in the inner side surface of the box body (401), and a damping sleeve (410) is arranged in the groove; the upper part and the lower part of the steel ball (407) are respectively and uniformly fixedly connected with a plurality of connecting rods (408) along the circumferential direction, and the connecting rods (408) are in one-to-one correspondence up and down; each connecting rod (408) forms a set angle with the horizontal plane, and the tail end of each connecting rod (408) is fixedly connected with a damping ball (409) in frictional contact with the damping sleeve (410).
3. The pipe damping apparatus of claim 2, wherein the set angle is 45 °.
4. A method of configuring a pipe damper using the pipe damper according to any one of claims 1 to 3, comprising the steps of:
step S1, determining the position of the pipeline (1) with the vibration exceeding standard, and determining the vibration of the pipeline (1) by using an acceleration sensor to obtain the vibration amplitude and frequency parameters of the pipeline (1);
step S2, determining the frequency of the whole pipeline vibration damping device according to the frequency parameters of the pipeline (1), achieving a vibration damping effect when the vibration frequency of the pipeline (1) is equal to the natural frequency of the pipeline vibration damping device, wherein the vibration frequency of the pipeline (1) measured in the step S1 is the total frequency of the pipeline vibration damping device consisting of all the absorption vibrators (4);
s3, selecting the type and the number of the absorption vibrators (4) according to the perimeter of the pipeline (1) and the total frequency of the pipeline vibration damping device, ensuring that the pipeline vibration damping device can be connected into a whole perimeter of the pipeline (1), and simultaneously ensuring that the difference between the total frequency of the pipeline vibration damping device and the vibration frequency of the pipeline (1) is not more than 5%;
and step S4, mounting the pipe vibration damper determined through the steps S1 to S3 on the pipe (1), detecting whether the amplitude of the pipe (1) after the pipe vibration damper is mounted meets the set requirement, and if not, repeating the steps S1 to S4.
5. The method of claim 4, wherein the measuring the amplitude and the frequency is performed a plurality of times to control the measurement error in step S1.
6. The method of claim 4, wherein in step S4, the setting requirement is: the amplitude of the pipe (1) after the pipe damper is installed must not exceed 20% of the amplitude of the pipe (1) measured in step S1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010385404.2A CN111457187B (en) | 2020-05-09 | 2020-05-09 | Pipeline vibration damper and configuration method thereof |
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| CN202010385404.2A CN111457187B (en) | 2020-05-09 | 2020-05-09 | Pipeline vibration damper and configuration method thereof |
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| CN111457187B true CN111457187B (en) | 2021-04-27 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112901890B (en) * | 2021-01-29 | 2022-03-01 | 中联重科股份有限公司 | Concrete pump truck arm support concrete pipe support vibration damping device and vibration damping method |
| CN113804697B (en) * | 2021-10-13 | 2024-05-24 | 安徽理工大学 | Mobile monitoring system for mining area pipeline construction |
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| FR2596122A1 (en) * | 1986-03-19 | 1987-09-25 | Glodkowski Richard | Vibration damping by the impacts of masses |
| CN204201363U (en) * | 2014-10-21 | 2015-03-11 | 南京航空航天大学 | Frequency-adjustable formula pipeline dynamic vibration absorber |
| CN205840033U (en) * | 2016-06-03 | 2016-12-28 | 武汉理工大学 | A kind of change friction tuned mass damper of belt shape memory alloy spring |
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| CN206971873U (en) * | 2017-07-31 | 2018-02-06 | 中国铁路总公司 | Tuned mass damper |
| CN109780112A (en) * | 2019-03-20 | 2019-05-21 | 华东交通大学 | A kind of piezoelectric type variation rigidity variable damping dynamic vibration absorber |
| CN110005901A (en) * | 2019-03-19 | 2019-07-12 | 苏州科技大学 | A kind of integrated frictional damping tuning quality shock bracket of multidimensional |
| CN110735987A (en) * | 2019-11-25 | 2020-01-31 | 珠海格力电器股份有限公司 | Pipeline vibration absorber and air conditioning unit |
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2020
- 2020-05-09 CN CN202010385404.2A patent/CN111457187B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2596122A1 (en) * | 1986-03-19 | 1987-09-25 | Glodkowski Richard | Vibration damping by the impacts of masses |
| CN204201363U (en) * | 2014-10-21 | 2015-03-11 | 南京航空航天大学 | Frequency-adjustable formula pipeline dynamic vibration absorber |
| CN205840033U (en) * | 2016-06-03 | 2016-12-28 | 武汉理工大学 | A kind of change friction tuned mass damper of belt shape memory alloy spring |
| CN206036407U (en) * | 2016-08-19 | 2017-03-22 | 中国船舶重工集团公司第七一九研究所 | Pipeline dynamic vibration absorber |
| CN206971873U (en) * | 2017-07-31 | 2018-02-06 | 中国铁路总公司 | Tuned mass damper |
| CN110005901A (en) * | 2019-03-19 | 2019-07-12 | 苏州科技大学 | A kind of integrated frictional damping tuning quality shock bracket of multidimensional |
| CN109780112A (en) * | 2019-03-20 | 2019-05-21 | 华东交通大学 | A kind of piezoelectric type variation rigidity variable damping dynamic vibration absorber |
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