CN109406119B - Dynamic characteristic matching test bed for air spring vibration isolation foot pad of compressor - Google Patents
Dynamic characteristic matching test bed for air spring vibration isolation foot pad of compressor Download PDFInfo
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- CN109406119B CN109406119B CN201811233807.4A CN201811233807A CN109406119B CN 109406119 B CN109406119 B CN 109406119B CN 201811233807 A CN201811233807 A CN 201811233807A CN 109406119 B CN109406119 B CN 109406119B
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- 238000002955 isolation Methods 0.000 title claims abstract description 103
- 238000012360 testing method Methods 0.000 title claims abstract description 57
- 238000001514 detection method Methods 0.000 claims abstract description 26
- 239000002184 metal Substances 0.000 claims description 15
- 230000001133 acceleration Effects 0.000 claims description 5
- 230000000087 stabilizing effect Effects 0.000 claims description 2
- 238000010998 test method Methods 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 5
- 238000011161 development Methods 0.000 abstract description 4
- 206010020649 Hyperkeratosis Diseases 0.000 description 11
- 238000000034 method Methods 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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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
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/023—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means
- F16F15/0232—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means with at least one gas spring
Abstract
The invention discloses a test bench for matching dynamic characteristics of air spring vibration isolation foot pads of a compressor, which comprises an air conditioner outdoor unit, wherein the air conditioner outdoor unit comprises a case and the compressor arranged in the case, a plurality of air spring vibration isolation foot pads are arranged between a bottom plate of the case and the compressor, a first vibration detection device for measuring vibration quantity is arranged at the upper ends of the air spring vibration isolation foot pads, a second vibration detection device for measuring vibration quantity is arranged at the lower ends of the air spring vibration isolation foot pads, and the air spring vibration isolation foot pads are also connected with an inflation device capable of inflating the air spring vibration isolation foot pads and an air pressure detection device capable of detecting the air. According to the invention, by adjusting the internal air pressure of the air spring vibration isolation foot pad, the optimal mechanical property parameters of each vibration isolation foot pad of the compressor can be quickly and accurately measured, and the rigidity parameters are provided for the structural design and development of the rubber vibration isolation foot pad.
Description
Technical Field
The invention relates to the technical field of vibration control and dynamic characteristic test of compressors, in particular to a dynamic characteristic matching test bed for an air spring vibration isolation foot pad of a compressor.
Background
The vibration is closely related to the life of people, but the vibration can not only cause and even accelerate the fatigue damage of the structure, but also influence the service life of the equipment, and simultaneously can generate certain noise, thereby causing certain troubles to the production and the life. As an indispensable commodity, people pay more attention to the problems of vibration and noise generated by a compressor, and reducing the vibration and noise of the compressor becomes an important index for market admission and competition in the household appliance industry.
At present, the rubber vibration reduction materials adopted by compressors and the like in China are more traditional, and similar product structures and vibration modes are adopted regardless of whether the vibration working conditions are consistent or not. Especially, the experimental research work of compressor callus on the sole to the influence of compressor vibration isolation performance is accomplished through changing the rubber callus on the sole of different grade type many rounds, and experimental cycle is long, and the callus on the sole matches the type selection degree of difficulty big.
Disclosure of Invention
In view of the above, the invention aims to provide a test bench for matching dynamic characteristics of air spring vibration isolation foot pads of compressors, which can quickly and accurately measure the optimal mechanical performance parameters of all the vibration isolation foot pads of the compressors and provide rigidity parameters for the structural design and development of rubber vibration isolation foot pads.
The technical scheme adopted by the invention for solving the technical problem is as follows:
the utility model provides a compressor air spring vibration isolation callus on sole dynamics characteristic matches test bench, includes the outer machine of air-conditioner, the outer machine of air-conditioner includes quick-witted case and sets up the compressor at quick-witted incasement, the bottom plate of machine case with be provided with a plurality of air spring vibration isolation callus on the sole between the compressor, the upper end of air spring vibration isolation callus on the sole is provided with the first vibration detection device who is used for measuring the vibration volume, the lower extreme of air spring vibration isolation callus on the sole is provided with the second vibration detection device who is used for measuring the vibration volume, air spring vibration isolation callus on the sole still is connected with can give its gas filled aerating device and can detect.
The compressor further includes a compressor pipe extending outside the casing, and the strain gauge is attached to the compressor pipe.
Preferably, the inflating device comprises an inflating pump, an air chamber, an air inlet valve and an air inlet pipe which are sequentially communicated, and an air tap communicated with the air inlet pipe is arranged on the air spring vibration isolation foot pad.
Preferably, the air pressure detecting device includes a line air pressure gauge provided on the intake pipe.
Furthermore, the air inlet pipe is connected with an exhaust valve capable of exhausting air in the air spring vibration isolation foot pad.
Furthermore, a pipeline safety valve is arranged on the air inlet pipe, and an air chamber safety valve and an air chamber barometer are arranged on the air chamber.
Preferably, the first vibration detection device and the second vibration detection device are both acceleration sensors.
Further, still include a test bench, be provided with the elastic rubber mat on the test bench, the outdoor machine of air-conditioner places on the elastic rubber mat.
Preferably, the air spring vibration isolation foot pad comprises a base and a rubber pad, wherein the base is in a cylindrical shape with a lower end closed and an upper end opened, the rubber pad is in a cylindrical shape with a lower end opened and an upper end closed, and the lower end of the rubber pad is bonded with the upper end of the base so that the air spring vibration isolation foot pad is in a cylindrical structure with two closed ends.
Preferably, the base comprises an outer metal pipe and an inner metal pipe screwed in the outer metal pipe, a bottom plate of the chassis is provided with a plug pin, and the inner metal pipe is sleeved on the plug pin.
Compared with the existing compressor vibration isolation performance testing technology, the compressor air spring vibration isolation foot pad dynamic characteristic matching test bed has obvious advantages and practical economic effects, and by means of the technical scheme, the compressor air spring vibration isolation foot pad dynamic characteristic matching test bed can reach an advanced technical level and has wide industrial utilization value. Compared with the prior art, the concrete advantages are that:
1. the air spring vibration isolation foot pad is used for mechanical property test and matching design of the compressor vibration isolation foot pad on the outdoor unit of the air conditioner for the first time.
2. The air pressure of the air spring vibration isolation foot pad can be independently controlled, so that the optimal mechanical property parameters of each vibration isolation foot pad of the compressor can be obtained through optimal matching, and the rigidity parameters are provided for the structural design and development of the rubber vibration isolation foot pad.
3. Compared with the traditional method for replacing and testing different rubber foot pads for multiple times to match a better foot pad product, the method has the advantages of quickly adjusting the rigidity of the foot pad by adjusting the air pressure of the air spring vibration isolation foot pad, reducing the installation and disassembly time of the vibration isolation foot pad, reducing the influence of disassembly and assembly on test data, and greatly improving the test efficiency and the accuracy of the test data.
4. The air spring vibration isolation foot pad disclosed by the invention does not need to be replaced in the whole testing process after being installed once. The control system directly adjusts the air pressure of the air spring vibration isolation foot pad to adjust the rigidity of the foot pad in real time, so that the time for a tester to detach and install the vibration isolation foot pad in a high-temperature or high-cold laboratory is reduced, and the test environment and conditions of the tester are greatly improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of a portion A of FIG. 1;
fig. 3 is a cross-sectional view of an inventive air spring vibration isolation foot pad.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.
Referring to fig. 1 to 3, an embodiment of the invention provides a test bench for matching dynamic characteristics of a compressor air spring vibration isolation foot pad, which includes a test bench 1 and an outdoor unit 2 of an air conditioner, the outdoor unit 2 of the air conditioner is placed on the test bench 1, the outdoor unit 2 of the air conditioner includes a cabinet 201 and a compressor 202 arranged in the cabinet 201, the compressor 202 is provided with a compressor pipe 203, and a free end of the compressor pipe 203 extends out of the cabinet 201. A plurality of air spring vibration isolation foot pads 3 are arranged between the bottom plate of the case 201 and the compressor 202, the upper ends of the air spring vibration isolation foot pads 3 are provided with first vibration detection devices 14 used for measuring vibration quantity, the lower ends of the air spring vibration isolation foot pads 3 are provided with second vibration detection devices 15 used for measuring vibration quantity, and the air spring vibration isolation foot pads 3 are further connected with inflation devices capable of inflating the air spring vibration isolation foot pads and air pressure detection devices capable of detecting air pressure inside the air spring vibration isolation foot pads 3. In order to realize automatic feedback control, the invention is also provided with a control system 19, and the control system 19 comprises a data collector 20, a computer 21 and an execution instruction sending unit 22. In fig. 1, there is a communication relationship between two components connected by a dotted line.
Further, the compressor pipe 203 is provided with a strain gauge 16, the strain gauge 16 is a foil-type resistance strain gauge, and the magnitude of stress on the compressor pipe 203 is calculated by measuring the amount of strain in the operating state of the compressor pipe 203. The strain gauge 16 is attached to a bent portion of an intake or exhaust pipe of the compressor pipe 203 to monitor the maximum stress of the compressor pipe 203 when the air pressure of the air spring vibration isolating pad 3 is different.
The number of the air spring isolation pads 3 is generally 3-4, but not limited thereto. Different air pressures can be input into each air spring vibration isolation foot pad 3 through the air charging device pair, so that the rigidity of each foot pad can be independently adjusted, and under the actual operation working condition of the compressor 202, vibration signals of the upper end and the lower end of each air spring vibration isolation foot pad 3 and stress signals of the bent part of the compressor pipe 203 close to the compressor 202 side are tested and recorded, so that the vibration mechanical characteristics of the compressor 202 under different working conditions are measured. The optimal mechanical property parameters of each vibration isolation foot pad can be matched according to the vibration mechanical characteristics of the compressor 202, and rigidity parameters are provided for the structural design and development of the rubber vibration isolation foot pad. Compared with the traditional method for replacing and testing different rubber foot pads for multiple times to match a better foot pad product, the method has the advantages of quickly adjusting the rigidity of the foot pad by adjusting the air pressure of the air spring vibration isolation foot pad 3, reducing the installation and disassembly time of the vibration isolation foot pad, reducing the influence of disassembly and assembly on test data, and greatly improving the test efficiency and the accuracy of the test data. The time for the test personnel to dismantle and install the vibration isolation foot pad in a high-temperature or high-cold laboratory is reduced, and the test environment and conditions where the test personnel are located are greatly improved.
In this embodiment, the first vibration detection device 14 and the second vibration detection device 15 are acceleration sensors, the first vibration detection device 14 is disposed at the upper end of the air spring vibration isolation foot pad 3, and the second vibration detection device 15 is disposed at the lower end of the air spring vibration isolation foot pad 3. The acceleration sensor is used for converting the vibration signal into an electric signal, and then the electric signal is processed by a preamplifier, a processing instrument and a conversion instrument to display the specific numerical value of the vibration quantity of the acceleration sensor. Assuming that the vibration quantity measured by the first vibration detecting device 14 is a and the vibration quantity measured by the second vibration detecting device 15 is b, we define (b-a)/b as the vibration isolating quantity of the air spring vibration isolating pad 3, and the larger the value of the vibration isolating quantity is, the better the vibration isolating effect is. Under the condition that the vibration isolation amount meets the requirement, the maximum stress on the compressor pipe 203 also meets the requirement, and the vibration isolation foot pad reaches the standard. Of course, the first vibration detection device 14 and the second vibration detection device 15 may also employ a velocity pickup, a displacement pickup, a force transducer, an integrator, or the like capable of detecting vibration.
Referring to fig. 1, the air charging device comprises an air charging pump 4, an air chamber 5, an air inlet valve 6 and an air inlet pipe 7 which are sequentially communicated, and an air tap 8 for communicating the air spring vibration isolation foot pad 3 with the air inlet pipe 7 is arranged on the air spring vibration isolation foot pad. The air inlet valve 6 is connected with the air chamber 5 and the air spring vibration isolation foot pad 3 through an air pipe, and the control system 19 adjusts the opening and closing of the valve of the air inlet valve 6 to increase or maintain the air pressure of the air spring vibration isolation foot pad 3.
An exhaust valve 10 capable of discharging gas in the air spring vibration isolating pad 3 is connected to the intake pipe 7. The exhaust valve 10 is connected with an air tap 8 of the air spring vibration isolation foot pad 3 through an air inlet pipe 7, and the opening and closing of the exhaust valve 10 are adjusted by the control system 19 to reduce or maintain the air pressure of the air spring vibration isolation foot pad 3.
The air pressure detection device comprises a pipeline air pressure gauge 9 arranged on an air inlet pipe 7, and the air inlet pipe 7 is directly communicated with the air spring vibration isolation foot pad 3, so that the air pressure inside the air inlet pipe 7 and the air pressure inside the air spring vibration isolation foot pad 3 are equal in a non-working state, the air pressure inside the air spring vibration isolation foot pad 3 can be directly obtained by measuring the air pressure inside the air inlet pipe 7, and the operation is more convenient compared with the air pressure inside the air spring vibration isolation foot pad 3 which. The pipeline barometer 9 monitors the air pressure value of the air spring vibration isolation foot pad 3, feeds the air pressure value back to the control system 19 in real time, and compares the air pressure value with the air pressure value set in the control system 19 to control the opening or closing of the air inlet valve 6 or the air outlet valve 10 in real time.
Be provided with pipeline relief valve 11 on the intake pipe 7, pipeline relief valve 11 is a relief valve, and it arranges to be connected on intake pipe 7 between discharge valve 10 and air spring vibration isolation callus on the sole 3, and the relief valve is automatic to be opened when the atmospheric pressure in the air spring vibration isolation callus on the sole 3 is too big, avoids the atmospheric pressure of air spring vibration isolation callus on the sole 3 too big and damage.
The gas chamber 5 is provided with a gas chamber safety valve 12, a gas chamber pressure gauge 13, and a gas chamber exhaust valve 23 capable of discharging gas in the gas chamber 5. The air chamber 5 is a sealed metal box body with a certain space volume and high strength, and before the whole test system operates, enough air pressure should be arranged in the air chamber 5 to ensure that the air spring vibration isolation foot pad 3 is inflated. A chamber barometer 13 is connected to the chamber 5 for monitoring the pressure of the chamber 5. When the air chamber barometer 13 monitors that the air pressure of the air chamber 5 is lower than the set value of the control system 19, the control system 19 automatically controls the inflator 4 to inflate the air chamber 5. After the test is finished, the control system 19 controls the gas chamber exhaust valve 23 to exhaust the gas in the gas chamber 5 so as to reduce the pressure of the gas in the gas chamber 5. The air chamber safety valve 12 is a pressure relief valve to prevent the air pressure in the air chamber 5 from being too high when the inflator pump 4 is excessively inflated, so that the high-pressure air in the air chamber 5 is prevented from damaging the pipeline in the test system.
The test stand 1 is a mounting platform for the outdoor unit 2 of the air conditioner, and bears a large vibration load, so that a rigid material with heavy mass, high strength and high rigidity is required to be used. The outdoor unit 2 of the air conditioner is the outdoor unit 2 of the air conditioner to be tested which operates according to the actual operation condition, and the elastic rubber mat 17 is arranged between the test bed 1 and the case 201 of the outdoor unit 2 of the air conditioner, so that the outdoor unit 2 of the air conditioner can be prevented from being in hard contact with the test bed 1, and the precision of the experiment can be improved.
Referring to fig. 3, the air spring vibro-damping pad 3 includes a base 302 and a rubber pad 301, the base 302 is cylindrical with a lower end closed and an upper end opened, the rubber pad 301 is cylindrical with a lower end opened and an upper end closed, and the lower end of the rubber pad 301 is bonded to the upper end of the base 302 so that the air spring vibro-damping pad 3 has a cylindrical structure with both ends closed. In this embodiment, the base 302 includes a metal outer tube 303 and a metal inner tube 304 screwed into the metal outer tube 303, the metal outer tube 303 is vulcanized and bonded with rubber, and the air faucet 8 is disposed on a side wall of the metal outer tube 303. The bottom plate of the case 201 is provided with a latch, and the metal inner tube 304 is sleeved on the latch.
The test method of the invention comprises the following steps:
(1) in the semi-anechoic chamber, the test bed 1, the elastic rubber mat 17, the outdoor unit 2 of the air conditioner, the strain gauge 16, the compressor pipe 203, the compressor 202, the three air spring vibration isolation foot pads 3, the air tap 8, the first vibration detection device 14, the second vibration detection device 15, the pipeline safety valve 11, the exhaust valve 10, the pipeline barometer 9, the air inlet pipe 7, the air inlet valve 6, the air chamber safety valve 12, the air chamber barometer 13, the air chamber 5, the air chamber exhaust valve 23, the inflator pump 4, the execution instruction sending unit 22, the data acquisition instrument, the computer 21 and the like are installed or connected as required.
(2) After the whole test system is powered on, the control system 19 automatically starts the inflator pump 4 to inflate the air chamber 5 by monitoring the air pressure of the air chamber barometer 13, and the air pressure of the air chamber 5 is kept above the minimum air pressure required by the test state.
(3) Before the test system runs, rigidity values are calculated according to the theories of the three air spring vibration isolation foot pads 3 and are converted into air pressure values, meanwhile, the air inlet valves 6 are opened to independently inflate the three foot pads, and the opening or closing of the air inlet valves 6 is monitored and controlled in real time by the pipeline barometer 9. When the air pressures of the three air spring vibration isolation foot pads 3 reach preset values respectively, the air inlet valve 6 is closed, the pressure is maintained for a certain time, and whether air leaks from 7 paths of the air inlet pipes is monitored by the pipeline barometer 9.
(4) And (4) performing pretesting, starting the compressor 202 after ensuring that each air inlet pipe 7 is airtight, running for a certain time, stopping the system after the system is stable, and monitoring whether a test signal is normal or not.
(5) During testing, the compressor 202 is started again, and vibration and stress signals under different loads in four working conditions of starting, accelerating, stabilizing and stopping are recorded according to the requirements of testing working conditions.
(6) And (5) controlling the opening or closing of the exhaust valve 10 and the intake valve 6, adjusting the air pressure of the three air spring vibration isolation foot pads 3, repeating the step (5), and recording vibration and stress signals under different working conditions.
(7) And after the test is finished, opening the air chamber exhaust valve 23.
The above is only a preferred embodiment of the present invention, and the technical solutions that achieve the objects of the present invention by basically the same means are all within the protection scope of the present invention.
Claims (9)
1. A dynamic characteristic matching test bed for an air spring vibration isolation foot pad of a compressor comprises an outdoor unit (2) of the air conditioner, wherein the outdoor unit (2) of the air conditioner comprises a case (201) and a compressor (202) arranged in the case (201), the dynamic characteristic matching test bed is characterized in that a plurality of air spring vibration isolation foot pads (3) are arranged between a bottom plate of the case (201) and the compressor (202), a first vibration detection device (14) used for measuring vibration quantity is arranged at the upper ends of the air spring vibration isolation foot pads (3), a second vibration detection device (15) used for measuring vibration quantity is arranged at the lower ends of the air spring vibration isolation foot pads (3), the air spring vibration isolation foot pads (3) are further connected with an inflation device which can inflate the air spring vibration isolation foot pads and can adjust the internal air pressure of the air spring vibration isolation foot pads, and, the compressor (202) has a compressor pipe (203) extending out of the casing (201), a strain gauge (16) attached to the compressor pipe (203),
the test method of the test bench comprises the following steps:
1. calculating a rigidity value according to the theory of the air spring vibration isolation foot pad (3), converting the rigidity value into a preset air pressure value, and starting an air charging device to charge air to the air spring vibration isolation foot pad (3) so that the air pressure in the air spring vibration isolation foot pad (3) reaches the preset air pressure value;
2. starting a compressor (202), recording four working conditions of starting, accelerating, stabilizing and stopping and vibration quantity and stress signals under different loads according to the requirement of a test working condition, wherein the vibration quantity a at the upper end of an air spring vibration isolation foot pad (3) is measured by a first vibration detection device (14), the vibration quantity b at the lower end of the air spring vibration isolation foot pad (3) is measured by a second vibration detection device (15), and the stress signals are measured by a strain gauge (16);
3. and (3) adjusting the air pressure in the three air spring vibration isolation foot pads (3), repeating the step (2) and recording the vibration quantity and the stress signals under different working conditions.
2. The compressor air spring vibration isolation foot pad dynamic characteristic matching test bed according to claim 1, wherein the inflation device comprises an inflation pump (4), an air chamber (5), an air inlet valve (6) and an air inlet pipe (7) which are sequentially communicated, and an air tap (8) for communicating the air spring vibration isolation foot pad with the air inlet pipe (7) is arranged on the air spring vibration isolation foot pad (3).
3. The compressor air spring isolation foot pad dynamics matching test rig according to claim 2, wherein said air pressure detection device includes a line air pressure gauge (9) disposed on said air intake tube (7).
4. The compressor air spring vibration isolation foot pad dynamics matching test bench according to claim 2, characterized in that an exhaust valve (10) capable of exhausting gas in the air spring vibration isolation foot pad (3) is connected to the air inlet pipe (7).
5. The compressor air spring isolation foot pad dynamics matching test bench of claim 2, characterized in that said intake pipe (7) is provided with a line relief valve (11), and said air chamber (5) is provided with an air chamber relief valve (12) and an air chamber barometer (13).
6. The compressor air spring isolation foot pad dynamics matching test rig of claim 1, wherein the first vibration detection device (14) and the second vibration detection device (15) are both acceleration sensors.
7. The test bench for matching the dynamic characteristics of the air spring vibration isolation foot pad of the compressor as claimed in claim 1, further comprising a test bench (1), wherein an elastic rubber pad (17) is disposed on the test bench (1), and the outdoor unit (2) of the air conditioner is placed on the elastic rubber pad (17).
8. The compressor air spring vibration isolation foot pad dynamic characteristic matching test bed as claimed in claim 1, wherein the air spring vibration isolation foot pad (3) comprises a base (302) and a rubber pad (301), the base (302) is cylindrical with a closed lower end and an open upper end, the rubber pad (301) is cylindrical with a closed lower end and an open upper end, and the lower end of the rubber pad (301) is bonded with the upper end of the base (302) so that the air spring vibration isolation foot pad (3) is cylindrical with two closed ends.
9. The compressor air spring isolation foot pad dynamics matching test bed of claim 8, wherein said base (302) comprises a metal outer tube (303) and a metal inner tube (304) threaded within the metal outer tube (303), a latch is disposed on a bottom plate of said cabinet (201), and said metal inner tube (304) is sleeved on said latch.
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| CN201811233807.4A CN109406119B (en) | 2018-10-23 | 2018-10-23 | Dynamic characteristic matching test bed for air spring vibration isolation foot pad of compressor |
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| CN201811233807.4A CN109406119B (en) | 2018-10-23 | 2018-10-23 | Dynamic characteristic matching test bed for air spring vibration isolation foot pad of compressor |
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| CN110500262A (en) * | 2019-09-12 | 2019-11-26 | 珠海格力电器股份有限公司 | A kind of damper mechanism of invariable frequency compressor, method, invariable frequency compressor and air-conditioning |
| CN110594343A (en) * | 2019-09-30 | 2019-12-20 | 广东邦达实业有限公司 | Vibration isolation foot pad for air conditioner compressor |
| CN113053072A (en) * | 2021-03-08 | 2021-06-29 | 浙江安防职业技术学院 | Pulse dust removal experiment gas bag operation safety monitoring system |
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| CN202149178U (en) * | 2011-06-10 | 2012-02-22 | 中国人民解放军总后勤部军事交通运输研究所 | Shock-absorbing device combined with mass block and air spring |
| CN203176652U (en) * | 2013-03-15 | 2013-09-04 | 中国计量学院 | Self-leveling type air spring vibration isolation table |
| CN103411748B (en) * | 2013-07-09 | 2016-02-03 | 西南交通大学 | A kind of dual air spring is comprehensive performance test bed |
| CN103364161A (en) * | 2013-07-09 | 2013-10-23 | 南车青岛四方机车车辆股份有限公司 | Test bench of comprehensive performance of air spring |
| CN106840559B (en) * | 2015-12-03 | 2019-07-26 | 株洲时代新材料科技股份有限公司 | A kind of adjustable single layer and double-layer vibration isolating system vibration mechine and test method |
| CN206772543U (en) * | 2017-04-14 | 2017-12-19 | 西南交通大学 | Stiffness variable variable damping device for vibration test |
| CN108278325B (en) * | 2018-01-11 | 2020-08-28 | 中国中元国际工程有限公司 | Large-scale high-precision passive air-floating vibration isolation platform integrated control cabinet |
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