CN114166644A - Viscous damper testing device and method - Google Patents
Viscous damper testing device and method Download PDFInfo
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- CN114166644A CN114166644A CN202210006888.4A CN202210006888A CN114166644A CN 114166644 A CN114166644 A CN 114166644A CN 202210006888 A CN202210006888 A CN 202210006888A CN 114166644 A CN114166644 A CN 114166644A
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- 238000012360 testing method Methods 0.000 title claims abstract description 96
- 238000000034 method Methods 0.000 title abstract description 28
- 238000013016 damping Methods 0.000 claims abstract description 29
- 238000003825 pressing Methods 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims description 76
- 238000004891 communication Methods 0.000 claims description 13
- -1 polytetrafluoroethylene Polymers 0.000 claims description 10
- 229920006324 polyoxymethylene Polymers 0.000 claims description 8
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- 238000007906 compression Methods 0.000 claims description 6
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- 230000008569 process Effects 0.000 abstract description 25
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- 229920006362 Teflon® Polymers 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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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
- F16F9/30—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium with solid or semi-solid material, e.g. pasty masses, as damping medium
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The invention discloses a viscous damper testing device and a viscous damper testing method, relates to the field of dampers, and aims to solve the technical problems of low testing precision and poor continuity of a loading process in the prior art. The viscous damper testing device comprises a pressure testing machine, a cylinder body and a movable piston assembly, wherein the piston assembly is arranged in the cylinder body and comprises a piston and a piston rod arranged on the piston; the side wall of the cylinder body close to the bottom is communicated with at least one high-pressure pipeline, and the at least one high-pressure pipeline is used for communicating the viscous damper to be tested; the pressure testing machine is used for pressing the damping medium in the cylinder body into the viscous damper. The test device provided by the invention is used for the pressure test of the viscous damper.
Description
Technical Field
The disclosure relates to the field of dampers, in particular to a viscous damper testing device and a viscous damper testing method.
Background
The viscous damper is a damper related to the moving speed of the piston, and is a damper made by the working principle that a throttling resistance is generated when a fluid passes through a throttling hole. The method is widely applied to the fields of high-rise buildings, bridges, building structure seismic reconstruction, industrial pipeline equipment seismic resistance, military industry and the like.
Because the viscous damper often has the problem of seal leakage in the use process, certain requirements are required for the pressure resistance test of the viscous damper in relevant standards. The pressure resistance test is finished by adopting a hydraulic pump or hydraulic loading equipment, so that the problems of low precision, large error, poor continuity of the loading process and the like exist.
Disclosure of Invention
The invention aims to provide a viscous damper testing device and a viscous damper testing method, which aim to solve the technical problems of improving the pressure resistance detection precision and automation and intellectualization of detection.
In order to achieve the purpose, the invention adopts the following technical scheme:
a viscous damper test device is used for pressure test of the viscous damper and comprises a pressure test machine, a cylinder body and a movable piston assembly arranged in the cylinder body,
the piston assembly comprises a piston and a piston rod arranged on the piston, and a sealing device is arranged on the piston and used for sealing a gap between the piston and the cylinder body;
the side wall of the cylinder body close to the bottom is communicated with at least one high-pressure pipeline, and the at least one high-pressure pipeline is used for communicating the viscous damper to be tested;
the pressure testing machine is used for pressing the damping medium in the cylinder body into the viscous damper.
According to at least one embodiment of the present disclosure, the piston is cylindrical, and at least one groove is circumferentially provided on an outer circumferential surface of the piston, and the sealing device is provided in the at least one groove.
According to at least one embodiment of the present disclosure, the sealing device includes a seal ring including at least one of an O-ring seal, a lip-section seal, and a Y-section seal.
According to at least one embodiment of the present disclosure, the sealing device further includes at least one sealing collar disposed in the groove, and the material of the sealing collar is polytetrafluoroethylene or polyoxymethylene.
According to at least one embodiment of this disclosure, the sealing retaining ring is two, at least one sealing washer clamp is located two between the sealing retaining ring.
According to at least one embodiment of the present disclosure, the roughness of the cylinder inner wall is Ra, wherein Ra is less than or equal to 0.8 μm.
According to at least one embodiment of the present disclosure, the cylinder has a threaded communication port, and the high-pressure line is connected to the communication port by a thread.
According to at least one embodiment of the disclosure, the bottom of the cylinder body is of a fully-closed structure, a first distance is formed between the communication port and the bottom of the cylinder body, and the first distance is 5% -10% of the height of the inner cavity of the cylinder body.
According to at least one embodiment of the present disclosure, the compression testing machine has a servo drive for applying a load and load rate force to the piston assembly.
Compared with the prior art, the viscous damper test device provided by the invention is used for a pressure test of the viscous damper and measuring the pressure reduction and damping medium leakage conditions of the viscous damper in the pressure test process. According to the invention, the viscous damper and the cylinder body form a communicating vessel through a high-pressure pipeline by utilizing the Pascal principle, and the pressure of a damping medium in the cylinder body is always consistent with that of the viscous damper, so that the pressure resistance of the viscous damper can be accurately measured. The high-pressure pipeline is arranged on the side wall of the cylinder body close to the bottom and communicated with the cylinder body, and the other end of the high-pressure pipeline is communicated with the viscous damper to be tested. When testing the viscidity attenuator of different grade type, as long as change the kneck of high pressure line for other viscidity attenuators, even if the interface of viscidity attenuator is different, as long as connect a switching mouth can. Therefore, the viscous damper testing device provided by the embodiment of the invention can be suitable for viscous dampers of various types, and has strong universality. Simultaneously, the intercommunication has a high-pressure line or two on the lateral wall that the cylinder body is close to the bottom, and even more high-pressure line, so a cylinder body can be when once operation, can measure two or more viscous dampers with the model or different models simultaneously, this because experimental apparatus utilizes be the pascal principle, and the pressure that enters into different viscous dampers is the same, consequently, can test a plurality of viscous dampers simultaneously, and work efficiency is higher. The piston of the piston assembly in the cylinder body is provided with the sealing device, the gap between the piston and the cylinder body is sealed through the sealing device, so that damping media in the cylinder body cannot be leaked from the gap, the pressure data of the pressure testing machine is consistent with the pressure in the cylinder body, and the accuracy of the data is guaranteed.
And pressing the damping medium in the cylinder body into the viscous damper by using a pressure testing machine. The sample device and the viscous damper form a communicating vessel, and the internal pressure is consistent by applying vertical force to the test device of the cylinder body and the piston assembly. The pressure tester has high control precision and controllable loading speed, so that the whole experimental process can be ensured to be continuous and stable. Meanwhile, the load control accuracy of the pressure tester is high, so that the pressure accuracy of the pressure resistance test is far higher than the reading of a pressure gauge in the prior art. Moreover, the pressure testing machine can control the whole testing process, and each link in the testing process is strictly developed according to a testing program to realize the programmed control of the whole testing process, so the viscous damper testing device has high programming and automation degrees.
The invention also provides a viscous damper test method, which is applied to the viscous damper test device,
connecting one end of a high-pressure pipeline to the cylinder body;
filling a damping medium into the cylinder body, wherein the damping medium is the same as that of the viscous damper to be tested;
loading a piston assembly into the cylinder and evacuating air from the high-pressure line;
connecting the high-pressure pipeline with a viscous damper to be tested;
and placing the assembled cylinder body on a platform of a pressure tester to apply pressure.
Compared with the prior art, the viscous damper test method has the following advantages:
the viscous damper test method of the invention has the same advantages as the viscous damper, and is not repeated herein.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.
Fig. 1 is a schematic structural diagram of a viscous damper testing apparatus according to the present disclosure.
Fig. 2 is a schematic structural view of a piston seal of the present disclosure.
FIG. 3 is a schematic step diagram of the viscous damper testing method of the present disclosure.
Detailed Description
The present disclosure will be described in further detail with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the present disclosure. It should be further noted that, for the convenience of description, only the portions relevant to the present disclosure are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict. The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
The viscous damper has the characteristics of high energy consumption capability, no additional rigidity and the like, and is widely applied to various fields. However, a quality problem often occurring in the use process of the viscous damper is a sealing leakage problem of the damper, and therefore, the pressure resistance of the viscous damper needs to be tested in the relevant national standard requirements. For example, the pressure resistance of the damper is mainly characterized by applying 1.5 times of design pressure to the damper and keeping the damper loaded for a certain time, so that the leakage condition of a damping medium in the damper is characterized. However, in the prior art, the pressure loading is generally completed through a hydraulic pump or hydraulic loading equipment, the loading of the hydraulic pump or hydraulic loading equipment generally fills the pressure through a manual hydraulic pump, the pressure gauge is used for judging the loaded pressure, and as the precision of the pressure gauge is not high, a larger error is easily generated; the loading rate of the manual hydraulic pump is unstable, the loading rate needs to be adjusted by observing the reading of a pressure gauge in the loading process, the continuity of the loading process is poor, and the automation and the intelligent degree of the test process are not high.
In view of the above problems, an embodiment of the present invention provides a viscous damper testing apparatus, which is used for a pressure test of a viscous damper, and includes a pressure testing machine, a cylinder, and a movable piston assembly disposed in the cylinder, where the piston assembly includes a piston and a piston rod disposed on the piston, and a sealing device is disposed on the piston and used for sealing a gap between the piston and the cylinder; the side wall of the cylinder body close to the bottom is communicated with at least one high-pressure pipeline, and the at least one high-pressure pipeline is used for communicating a viscous damper to be tested; the pressure testing machine is used for pressing the damping medium in the cylinder body into the viscous damper.
Referring to fig. 1, an embodiment of the invention provides a viscous damper testing apparatus, which has the characteristics of simple structure and strong versatility, and can realize intelligent loading, high accuracy of loading pressure and small time recording deviation by a pressure testing machine (not shown in the figure). According to the embodiment of the invention, the viscous damper and the cylinder body testing device form a communicating vessel by using the Pascal principle, so that the pressure resistance detection device can be suitable for pressure resistance detection of viscous dampers of various models. The cylinder body 1 is communicated with the viscous damper through the high-pressure pipeline 6, and when the viscous dampers of different models are tested, the viscous dampers can be conveniently detached and replaced, so that the viscous dampers have very good specification adaptability. It is understood that other devices requiring pressure testing, not limited to viscous dampers, can also be pressure tested using the test device of the present invention. The piston assembly comprises a piston 2 and a piston rod arranged on the piston 2, and the piston 2 can move up and down in the cylinder 1 so as to apply different pressure loads to the damping medium 4 in the cylinder. The piston 2 is also provided with a sealing device 3, the sealing device 3 completely separates the piston 2 in the space of the cylinder body 1, so that the damping medium 4 in the cylinder body 1 is not leaked to the upper part of the piston 2, and the pressure data of the pressure testing machine, namely the pressure of the damping medium in the cylinder body 1, is further ensured, and the pressure is accurate. The pressure testing machine is used for pressing the damping medium 4 in the cylinder body 1 into the viscous damper through the load applied to the piston rod, and the experimental device is based on the Pascal principle, so that the pressure in the cylinder body 1 is consistent with the pressure of the viscous damper, and the pressure testing data of the viscous damper is very accurate due to the fact that the pressure data of the cylinder body 1 can be accurately controlled.
In certain embodiments, the piston 2 and the piston rod of the piston assembly may be integrally welded and then finish machined. The piston 2 and the piston rod of the piston assembly can also be detachably connected and assembled together after being respectively processed.
Since the pressure testing machine is a mature pressure testing device, it can be understood that in some embodiments of the present invention, the specific type of the pressure testing machine is not limited. The pressure testing machine has the characteristics of continuous intelligent loading, high accuracy of loading pressure and small time recording deviation, is high in control precision, uniform and controllable in loading speed, and can ensure the continuity and stability of the whole testing process. The pressure testing machine can be programmed, so that the whole testing process can be accurately controlled according to needs, each link in the testing process is strictly developed according to a testing program, the whole testing process is controlled in a programmed mode, and therefore the intellectualization and the automation of the pressure testing of the viscous damper can be achieved.
It can be understood that, although only one communicating high-pressure pipeline is shown in fig. 1, since the embodiment of the present invention operates according to the pascal principle, 1, 2, 3, 4, 6, 8, etc. high-pressure pipelines may be connected to the cylinder 1, and the high-pressure pipelines may be tested simultaneously without affecting the accuracy of the test result.
When the cleaning device is used, the cylinder body 1, the piston 2, the sealing device 3, the high-pressure pipeline 6 and the like are carefully cleaned by using clean solvents, no iron cutting or other impurities are ensured in the cylinder body, and the inner wall of the cylinder barrel can not be scratched by attention in the cleaning process. One end of the high-pressure pipeline 6 is connected with the cylinder barrel 1 of the pressure-resistant test tool, so that the connection is ensured to be complete, and the leakage at the joint in the high-pressure test process is avoided. The sealing means 3 is mounted on the piston 2 of the piston assembly, ensuring that the sealing means 3 is damaged during mounting. The cylinder body 1 is filled with damping medium which is completely the same as that used by the viscous damper, and the loading height of the damping medium is about 60% of the height of the inner cavity of the cylinder body 1, so that the piston assembly can be loaded in the cylinder body 1; finally, the piston assembly is installed into the cylinder 1, and the sealing device 3 is protected from any damage in the assembling process.
In some embodiments, the piston 2 is cylindrical, and the outer circumferential surface of the piston 2 is circumferentially provided with at least one groove, in which the sealing means 3 is provided.
An annular groove can be arranged on the circumferential surface of the outer circle of the piston 2, and because the force applied by the damping medium of the cylinder body 1 is large, the force needs to be 1.5 times of the design pressure of the damper and the damping medium is loaded for a certain time. In order to prevent leakage of the damping medium at the piston 2, the circumferential surface of the piston 2 is sealed in the form of a groove-sealing device. The number of the grooves may be plural, for example, 2, and further, the sealing effect between the piston 2 and the cylinder 1 is ensured.
In certain embodiments, the sealing device 3 includes a sealing ring 32, and the sealing ring 32 includes at least one of an O-ring, a lip-section, and a Y-section.
The sealing device 3 may include a sealing ring 32, and the sealing ring 32 may be a conventional O-ring, or may be another sealing ring having a different shape, such as a lip-shaped sealing ring or a Y-shaped sealing ring. It is understood that there may be one sealing ring 32, or a combination of 2 or more sealing rings according to actual requirements, so as to achieve a certain sealing effect.
In order to further improve the sealing effect of the sealing device 3, the sealing device 3 further includes at least one sealing ring 31 disposed in the groove, and the material of the sealing ring 31 is teflon or polyoxymethylene. The sealing retainer ring 31 can be used in cooperation with the sealing ring 32, the number of the sealing retainer ring 31 can be one, the sealing retainer ring 31 is arranged on one side of the sealing ring 32, and the rigidity of the sealing retainer ring 31 is higher than that of the sealing ring 32 due to the fact that the sealing retainer ring is made of polytetrafluoroethylene or polyformaldehyde. Therefore, when the seal ring 32 is deformed by extrusion, the retainer ring 31 can support the O-shaped rubber ring well, and can prevent the seal ring 32 from deforming too much or the O-shaped rubber ring from deforming sufficiently due to the depth of the groove, so that the sealing effect of the seal ring 32 cannot achieve the sealing required by the test. When the number of the sealing retainer rings 31 is 2, the two sealing retainer rings 31 are respectively positioned at two sides of the sealing ring 32, so that when the O-shaped rubber ring 32 is extruded and deformed, the two retainer rings 31 can have good supporting effect on the O-shaped rubber ring on two sides. Meanwhile, the material of the sealing retainer ring 31 is polytetrafluoroethylene or polyformaldehyde, the polytetrafluoroethylene and polyformaldehyde both have good self-lubricating performance, the sealing effect and the self-lubricating effect are achieved on the sliding of the piston in the cylinder body, and the service life of the sealing retainer ring 31 is longer. The polytetrafluoroethylene and the polyformaldehyde also have the characteristics of acid-base resistance and organic solvent resistance, so that the polytetrafluoroethylene and the polyformaldehyde can be suitable for almost all damping media.
Due to the repeated friction between the sealing means 3 and the cylinder 1, the inner wall of the cylinder 1 has a roughness Ra, wherein Ra is less than or equal to 0.8 μm, taking into account the service life of the sealing means 3 and the precise application of pressure in the inner cavity of the cylinder 1. Alternatively, Ra is 0.1 μm after the inner wall roughness processing of the cylinder block 1.
In order to facilitate connection of the high-pressure line 6, the cylinder 1 has a threaded communication port 5, and the high-pressure line 6 is connected to the communication port 5 by a thread. The communication opening 5 is connected with the high-pressure pipeline 6 through a sealed thread with a seal, for example, a pipe thread, so as to ensure that the medium in the cylinder 1 does not leak from the communication opening. The pressure of the high-pressure pipeline 6 is required to be not lower than 90Mpa so as to meet the detection requirement of the conventional viscous damper.
In some embodiments, the bottom of the cylinder body 1 is of a fully-closed structure, a first distance is formed between the communication port 5 and the bottom of the cylinder body, and the first distance is 5% -10% of the height of the inner cavity of the cylinder body 1. In order to ensure that the damping medium in the cylinder body 1 does not leak from the bottom when being subjected to high pressure, the bottom of the cylinder body 1 is of a fully closed structure, and exemplarily, the bottom of the cylinder body 1 and the cylinder body 1 are integrally formed. The communication port 5 is arranged close to the bottom of the cylinder body, so that on one hand, the communication port and the piston assembly are not interfered; on the other hand, the first distance between the communicating port 5 and the bottom of the cylinder body is 5% -10% of the height of the inner cavity of the whole cylinder body, for example, the first distance is 20mm, so that the manufacturability of processing the communicating port can be guaranteed, the bottom of the cylinder body can be guaranteed to be provided with an integrally closed cavity, and the damping medium can be guaranteed not to leak at the bottom of the cylinder body to the maximum extent.
The compression testing machine adopted by the embodiment of the invention is provided with the servo driver, and the servo driver is used for applying force with certain load and loading rate to the piston assembly. The pressure testing machine with the servo driver is adopted, so that the loading speed, the loading value, the load retention time and the like of the load can be accurately controlled, the control precision is high, the loading speed is uniform and controllable, and the continuity and stability of the whole testing process can be ensured. The servo driver has good program controllability, so that the whole test process can be automatically controlled in a programmed mode.
The embodiment of the invention also provides a viscous damper test method, which is applied to the viscous damper test device.
Connecting one end of a high-pressure pipeline 6 to the cylinder body 1;
filling a damping medium 4 into the cylinder body 1, wherein the damping medium 4 is the same as that of the viscous damper to be tested;
the piston assembly is arranged in the cylinder body 1, and air in the high-pressure pipeline 6 is exhausted;
connecting the high-pressure pipeline 6 with a viscous damper to be tested;
and placing the assembled cylinder body on a platform of a pressure tester to apply pressure.
Specifically, the viscous damper test method comprises,
step S1001: before testing, cleaning a testing tool, such as a cylinder body 1, a piston assembly, a sealing device 3, a high-pressure pipeline 6 and the like, by using a solvent, ensuring that no iron scraps or other impurities exist in each part, and paying attention to the fact that the inner wall of the cylinder body 1 cannot be scratched in the cleaning process; after the tool is cleaned up, assembling the tool;
step S1002: one end of the high-pressure pipeline 6 is in threaded connection with the cylinder body 1 at the communicating port 5, so that the sealing performance of the joint is guaranteed, and leakage at the joint in the high-pressure process is avoided.
Step S1003: the piston assembly and the sealing device 3 are assembled, and the sealing retainer 31 and the sealing ring 32 are arranged in the groove of the piston 2, so that the sealing element is not damaged.
Step S100: the cylinder body 1 is filled with damping media which are completely the same as those used by the viscous damper, and the loading height of the damping media is about 60% of the height of the inner cavity of the cylinder body, so that the piston rod structure can be installed in the cylinder body 1;
step S200: the piston assembly is arranged in the cylinder body 1, and a sealing element is protected from any damage in the assembling process; applying a certain load to the piston assembly to discharge all the gas in the cylinder 1 and the high-pressure pipeline 6;
step S2001: and after the air in the cylinder body 1 and the high-pressure pipeline 6 is exhausted, the other end of the high-pressure pipeline 6 is connected with an oil hole of the damper.
Step S300: and (3) placing the assembled cylinder body on a large-tonnage compression testing machine, and accurately calculating the load applied to the piston according to the diameter and the prepressing pressure of the piston. And setting relevant test parameters such as loading speed, loading load, load retention time and the like on the software of the compression testing machine, and applying vertical force to the piston assembly through the compression testing machine according to a load control mode to carry out a test.
In the test process, attention is paid to observing whether leakage conditions exist at each interface part and the viscous damper body of the test device. After the test is finished, all the components are disassembled, and the test site is cleaned.
In the description herein, reference to the description of the terms "one embodiment/mode," "some embodiments/modes," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/mode or example is included in at least one embodiment/mode or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to be the same embodiment/mode or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/aspects or examples and features of the various embodiments/aspects or examples described in this specification can be combined and combined by one skilled in the art without conflicting therewith.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
It will be understood by those skilled in the art that the foregoing embodiments are merely for clarity of illustration of the disclosure and are not intended to limit the scope of the disclosure. Other variations or modifications may occur to those skilled in the art, based on the foregoing disclosure, and are still within the scope of the present disclosure.
Claims (10)
1. A viscous damper test device is characterized in that the viscous damper test device is used for a pressure test of the viscous damper and comprises a pressure test machine, a cylinder body and a movable piston assembly arranged in the cylinder body,
the piston assembly comprises a piston and a piston rod arranged on the piston, and a sealing device is arranged on the piston and used for sealing a gap between the piston and the cylinder body;
the side wall of the cylinder body close to the bottom is communicated with at least one high-pressure pipeline, and the at least one high-pressure pipeline is used for communicating the viscous damper to be tested;
the pressure testing machine is used for pressing the damping medium in the cylinder body into the viscous damper.
2. The viscous damper testing device of claim 1, wherein the piston is cylindrical, the outer circumferential surface of the piston is circumferentially provided with at least one groove, and the sealing device is disposed in the at least one groove.
3. The viscous damper test apparatus of claim 2, wherein the sealing means comprises a seal ring comprising at least one of an O-ring, a lip-section seal ring, and a Y-section seal ring.
4. The viscous damper testing device of claim 3, wherein the sealing device further comprises at least one sealing collar disposed in the groove, and the material of the sealing collar is polytetrafluoroethylene or polyoxymethylene.
5. The viscous damper testing device of claim 4, wherein the number of the sealing rings is two, and the at least one sealing ring is clamped between the two sealing rings.
6. A viscous damper test apparatus according to any one of claims 1 to 5, wherein the roughness of the cylinder inner wall is Ra, wherein Ra is less than or equal to 0.8 μm.
7. A viscous damper test apparatus according to any one of claims 1 to 5, wherein the cylinder has a threaded communication port, and the high-pressure line is connected to the communication port by a thread.
8. The viscous damper testing device according to claim 7, wherein the bottom of the cylinder body is of a fully closed structure, a first distance is formed between the communication port and the bottom of the cylinder body, and the first distance is 5% -10% of the height of the inner cavity of the cylinder body.
9. The viscous damper test apparatus of any of claims 1-5, wherein the compression tester has a servo drive for applying a load and load rate force to the piston assembly.
10. A viscous damper test method, which is applied to the viscous damper test apparatus according to any one of claims 1 to 9,
connecting one end of a high-pressure pipeline to the cylinder body;
filling a damping medium into the cylinder body, wherein the damping medium is the same as that of the viscous damper to be tested;
loading a piston assembly into the cylinder and evacuating air from the high-pressure line;
connecting the high-pressure pipeline with a viscous damper to be tested;
and placing the assembled cylinder body on a platform of a pressure tester to apply pressure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210006888.4A CN114166644A (en) | 2022-01-05 | 2022-01-05 | Viscous damper testing device and method |
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| CN202210006888.4A CN114166644A (en) | 2022-01-05 | 2022-01-05 | Viscous damper testing device and method |
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| CN114166644A true CN114166644A (en) | 2022-03-11 |
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