CN110618049A - Humidity chamber device for rotary friction wear test - Google Patents
Humidity chamber device for rotary friction wear test Download PDFInfo
- Publication number
- CN110618049A CN110618049A CN201910681526.3A CN201910681526A CN110618049A CN 110618049 A CN110618049 A CN 110618049A CN 201910681526 A CN201910681526 A CN 201910681526A CN 110618049 A CN110618049 A CN 110618049A
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- humidity
- humidity chamber
- clamp
- ring
- wear test
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/002—Test chambers
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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
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
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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
- G01N3/56—Investigating resistance to wear or abrasion
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0026—Combination of several types of applied forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0236—Other environments
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
Abstract
The invention discloses a humidity cavity device for a rotary friction wear test, which comprises a humidity cavity main body, a sealing cover assembly, a clamp, a force measuring sensor, a humidity sensor, a rotating platform, a motor mounting table and a motor rotating shaft, wherein the humidity cavity main body is provided with a sealing cover; the humidity cavity body defines a humidity cavity and is provided with an upper opening and a lower opening; the upper opening of the sealing cover component is sealed; the upper end of the clamp is fixed on the inner side surface of the sealing cover assembly and can move up and down and horizontally; the force measuring sensor is arranged on the outer side surface of the sealing cover assembly and is positioned above the clamp; the humidity sensor is arranged on the humidity cavity main body; the rotating platform is horizontally arranged in the humidity cavity and is positioned below the clamp; the motor mounting table is sealed at the lower opening; the motor shaft vertically passes through the motor mounting table, the upper end of the motor shaft is fixed with the rotating platform, and the lower end of the motor shaft is connected with a motor arranged on the lower surface of the motor mounting table. The device is applicable to the friction wear testing machine rotation module, and the humidity chamber closure is good, and the test piece is changed conveniently.
Description
Technical Field
The invention relates to the technical field of friction and wear performance tests of environmental humidity, in particular to a humidity cavity device for a rotary friction and wear performance test.
Background
Studying the effect of ambient humidity on frictional wear performance generally requires experiments with a frictional wear tester equipped with a humidity chamber device. At present, some problems occur due to structural design defects of a humidity cavity device of a rotary friction wear test, such as poor sealing performance of the humidity cavity; humidity changes in the humidity chamber cannot be monitored; the movement of the clamp is limited; the working condition of the test piece in the humidity cavity is not convenient to observe; a liquid storage structure is not provided, so that the driving platform is easily polluted; the humidity cavity has the problems of large volume, long time consumption for humidity adjustment and the like; these problems greatly affect the test results, and even the rotary friction and wear test cannot be performed.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention aims to provide a humidity cavity device for a rotary friction and wear test, which is suitable for a rotary module of a friction and wear testing machine, has good humidity cavity closure and is convenient for replacing a test piece.
According to the embodiment of the invention, the humidity chamber device for the rotary type friction wear test comprises:
the humidity chamber comprises a humidity chamber main body, wherein the humidity chamber main body defines a humidity chamber, and an upper opening and a lower opening which are communicated with the humidity chamber are formed in the humidity chamber main body;
the sealing cover assembly covers the upper opening and is connected with the humidity cavity main body in a sealing mode;
the upper end of the clamp is fixed on the inner side surface of the sealing cover assembly, the lower end of the clamp is used for fixing an upper test piece and can extend into the humidity cavity from the upper opening, and the clamp can move up and down and horizontally;
the force sensor is arranged on the outer side surface of the sealing cover assembly, is positioned above the clamp and is used for measuring the loading force applied to the clamp;
the humidity sensor is arranged on the humidity cavity body and used for measuring the humidity in the humidity cavity;
a rotating platform horizontally arranged in the humidity cavity and positioned below the clamp,
the motor mounting table is sealed at the lower opening;
the motor shaft vertically penetrates through the motor mounting table, the upper end of the motor shaft is fixed to the rotating platform, and the lower end of the motor shaft is connected with a motor mounted on the lower surface of the motor mounting table.
According to the humidity cavity device for the rotary type friction and wear test, disclosed by the embodiment of the invention, as the clamp is vertically arranged, the lower end of the clamp is used for fixing the upper test piece, the rotary platform is horizontally arranged, the upper surface of the rotary platform is used for fixing the lower test piece, and the rotary platform can enable the lower test piece to be in friction with the upper test piece fixed on the lower end of the clamp when rotating, the humidity cavity device is suitable for a rotary module of a friction and wear testing machine, and provides good experimental guarantee for researching the influence of a humidity environment on friction and wear performance. The upper opening of the humidity cavity body is sealed through the sealing cover assembly, and the lower opening of the humidity cavity body is sealed through the motor mounting table, so that the humidity cavity has better sealing performance, can be effectively isolated from the surrounding environment, and ensures the stability of humidity and pressure in the humidity cavity during a friction wear test; meanwhile, the disassembly and assembly are convenient, and the upper test piece and the lower test piece are also convenient to replace. The humidity sensor is arranged, so that the humidity value in the humidity cavity during the friction wear test can be clearly and accurately obtained, the load value can be conveniently and accurately obtained by arranging the force measuring sensor, and the accuracy and reliability of the test result are facilitated.
According to an embodiment of the present invention, the humidity chamber further includes a bushing, the bushing is disposed on the upper surface of the motor mounting table, the bushing includes a ring bottom plate, an outer ring vertical plate and an inner ring vertical plate extending upward from the ring bottom plate, the outer ring vertical plate and the inner ring vertical plate are disposed at an interval and are located outside the inner ring vertical plate, an annular groove is formed on the ring bottom plate, the outer ring vertical plate and the inner ring vertical plate are in clearance fit with each other, and the inner ring vertical plate is located below the rotating platform and close to the lower surface of the rotating platform.
According to a further embodiment of the invention, the motor installation platform further comprises a fixing screw, a counter bore and a through hole which are communicated with each other are formed in the outer ring vertical plate from top to bottom, a screw hole corresponding to the through hole and the counter bore is formed in the motor installation platform, and the fixing screw is arranged in the counter bore, the through hole and the screw hole in a matched mode to fasten the bushing on the motor installation platform.
According to a further embodiment of the present invention, the inner peripheral wall of the humidity chamber includes an upper inner peripheral wall, a connecting wall and a lower inner peripheral wall, which are sequentially connected from top to bottom, wherein the upper inner peripheral wall is located above the annular groove, the connecting wall covers the top of the outer annular vertical plate, and the lower inner peripheral wall and the outer annular vertical plate are in clearance fit.
According to a still further embodiment of the present invention, the outer circumferential surface of the rotary platform is opposite to the upper inner circumferential wall and spaced apart by a distance of 8-12 mm.
According to some embodiments of the invention, a boss is arranged on the upper surface of the motor mounting table, the boss is located in the annular hole of the inner annular vertical plate, and the outer peripheral surface of the boss is in clearance fit with the inner annular vertical plate.
According to some embodiments of the present invention, the sealing cover assembly comprises a sealing cover body and a clamp sleeve, wherein the top and the bottom of the sealing cover body are respectively provided with a top cover opening and a bottom cover opening, the clamp sleeve seals the upper cover opening, the upper end of the clamp is fixed on the inner side surface of the clamp sleeve, the bottom cover opening of the sealing cover body is communicated with the upper opening, and the lower end of the sealing cover body is hermetically connected with the humidity chamber main body.
According to a further embodiment of the present invention, the clamp sleeve includes a top plate and a surrounding plate extending downward from a periphery of the top plate, a lower peripheral portion of the surrounding plate is connected to a peripheral portion of the top cover opening of the seal cover body in a sealing manner by a first seal ring, and an upper end of the clamp is fixed to an inner side surface of the top plate.
According to a further embodiment of the present invention, the sealing cap assembly further includes an end cover, the end cover includes an upper ring body and a lower ring body that are coaxially connected up and down, the upper ring body is hermetically connected to a periphery of the bottom cap opening of the sealing cap body through a second sealing ring, an outer peripheral surface of the lower ring body is hermetically fitted to an inner peripheral surface of the upper opening, and the clamp passes through the upper ring body and the lower ring body.
According to a still further embodiment of the present invention, an outer diameter dimension of the upper ring body is greater than an outer diameter dimension of the lower ring body, so that a lower bottom surface of the upper ring body abuts against an outer surface of the humidity chamber main body.
According to a further embodiment of the invention, the sealing boot body is a flexible sealing boot.
According to a still further embodiment of the present invention, the sealing cap body is made of PA film.
According to a further embodiment of the present invention, the load cell further comprises a buffer sheet disposed between the load cell and the clamp sleeve.
According to some embodiments of the invention, the humidity chamber body is provided with a humidity sensor mounting hole, and the humidity sensor is mounted in the humidity sensor mounting hole.
According to some embodiments of the invention, the humidity chamber body is provided with a threaded hole for connecting a humidity generator.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic cross-sectional view of a humidity chamber device for a rotary friction wear test according to an embodiment of the present invention.
Fig. 2 is an enlarged schematic view of a point a in fig. 1.
Fig. 3 is an enlarged schematic view of fig. 1 at B.
Reference numerals:
humidity chamber device 1000 for rotary friction and wear test
Humidity chamber body 1
An upper inner peripheral wall 101 connects the lower inner peripheral wall 103 of the wall 102
Threaded hole 105 of humidity sensor mounting hole 104
Sealing boot assembly 2
The first sealing ring 203 of the clamp sleeve 202 top plate 2021 and the baffle 2022 of the sealing cover body 201
Second seal ring 205 of ring 2041 and ring 2042 on end cover 204
Clamp 3
Force sensor 4
Rotating platform 6
Motor mounting table 7 boss 701
Motor shaft 8
Bushing 9 ring bottom plate 901 outer ring riser 902 inner ring riser 903
Set screw 10
Buffer sheet 11
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
The humidity chamber device 1000 for the rotary type friction wear test according to the embodiment of the present invention is described below with reference to fig. 1 to 3.
As shown in fig. 1 to 3, a humidity chamber device 1000 for a rotary friction wear test according to an embodiment of the present invention includes a humidity chamber body 1, a seal cover assembly 2, a clamp 3, a load cell 4, a humidity sensor, a rotary platform 6, a motor mounting table 7, and a motor shaft 8. The humidity chamber body 1 defines a humidity chamber, and an upper opening and a lower opening which are communicated with the humidity chamber are arranged on the humidity chamber body 1; the sealing cover component 2 covers the upper opening and is connected with the humidity cavity body 1 in a sealing way; the upper end of the clamp 3 is fixed on the inner side surface of the sealing cover component 2, the lower end of the clamp 3 is used for fixing an upper test piece and can extend into the humidity cavity from the upper opening, and the clamp 3 can move up and down and horizontally; the load cell 4 is arranged on the outer side surface of the seal cover assembly 2 and above the clamp 3 and is used for measuring the loading force applied to the clamp 3; the humidity sensor is arranged on the humidity cavity body 1 and used for measuring the humidity in the humidity cavity; the rotating platform 6 is horizontally arranged in the humidity cavity and is positioned below the clamp 3; the motor mounting table 7 is sealed at the lower opening; motor shaft 8 vertically passes motor mount table 7, and motor shaft 8's upper end is fixed with rotary platform 6, and motor shaft 8's lower extreme links to each other with the motor of installing on motor mount table 7 lower surface.
Specifically, the humidity chamber body 1 defines a humidity chamber, and provides a specific humidity environment for the friction wear test. Be equipped with on the humidity chamber main part 1 with the last uncovered and lower uncovered of humidity chamber intercommunication, go up uncovered 3 of being convenient for anchor clamps and stretch into the humidity intracavity to be favorable to the removal of 3 upper and lower directions of anchor clamps and horizontal direction, uncovered installation that makes things convenient for the relevant part of motor down, so that 6 horizontal rotation of rotary platform through in the motor drive humidity chamber.
The sealing cover component 2 covers the upper opening and is connected with the humidity cavity body 1 in a sealing way; that is to say, through the upper uncovered sealed of sealed cowling subassembly 2 on with humidity chamber main part 11, constitute inclosed humidity chamber space, humidity and pressure stability in the humidity chamber when being favorable to keeping frictional wear performance test are favorable to going on smoothly and obtaining accurate reliable result experimently.
The upper end of anchor clamps 3 is fixed on the medial surface of sealed cowling subassembly 2, and the lower extreme of anchor clamps 3 is arranged in fixed test piece and can follow the uncovered humidity chamber that stretches into to guarantee that last test piece on anchor clamps 3 and anchor clamps 3 is in comparatively confined humidity chamber. The clamp 3 can move up and down and horizontally, and it can be understood that during testing, under the action of external loading force, the clamp 3 needs to move down to enable the upper test piece to be extruded and fixed on the lower test piece on the upper surface of the rotary platform 6, so that friction occurs between the rotary lower test piece and the upper test piece, and in order to adjust the turning radius of the upper test piece and complete centering of the upper test piece and the lower test piece, the clamp 3 needs to be guaranteed to move up and down and horizontally.
A load cell 4 is provided on the outer side of the seal boot assembly 2 above the clamp 3 for measuring the loading force exerted on the clamp 3. It will be appreciated that the isolation of the humidity chamber from the load cell 4 is achieved by the sealed enclosure assembly 2, preventing the high humidity environment from affecting the life of the load cell 4. The data of the external loading load can be measured through the force measuring sensor 4, and the accuracy and reliability of a test result can be guaranteed.
The humidity sensor is installed on the humidity cavity main body 1 and used for measuring the humidity in the humidity cavity, so that the humidity value in the humidity cavity can be conveniently, clearly and accurately known, the humidity change in the humidity cavity is monitored, and the accuracy and reliability of a test result are guaranteed.
The rotary platform 6 is horizontally arranged in the humidity cavity and is positioned below the clamp 3. It can be understood that the upper surface of the rotary platform 6 is used for fixing the lower test piece, and the rotary platform 6 drives the lower test piece to rotate and rub against the upper test piece fixed on the lower end of the clamp 3.
The motor mounting table 7 is sealed at the lower opening. It can be understood that the lower opening of the motor mounting table 7 is sealed, so that the humidity cavity is relatively closed, the humidity and the pressure in the humidity cavity are kept stable during a friction and wear test, the smooth test is facilitated, and an accurate and reliable result is obtained; meanwhile, the motor mounting table 7 is also used for mounting a motor and supporting a motor rotating shaft 8.
Motor shaft 8 vertically passes motor mount table 7, and motor shaft 8's upper end is fixed with rotary platform 6, and motor shaft 8's lower extreme links to each other with the motor of installing on motor mount table 7 lower surface. Therefore, the motor rotating shaft 8 can drive the rotating platform 6 to rotate horizontally under the driving of the motor, and meanwhile, the installation is convenient.
According to the humidity cavity device 1000 for the rotary type friction and wear test, provided by the embodiment of the invention, as the clamp 3 is vertically arranged, the lower end of the clamp 3 is used for fixing the upper test piece, the rotating platform 6 is horizontally arranged, the upper surface of the rotating platform 6 is used for fixing the lower test piece, and the rotating platform 6 can drive the lower test piece to rotate so as to rub against the upper test piece fixed on the lower end of the clamp 3, the humidity cavity device is suitable for a rotating module of a friction and wear testing machine, and can provide good experimental guarantee for researching the influence of a humidity environment on the friction and wear performance. The upper opening of the humidity cavity body 1 is sealed through the sealing cover assembly 2, and the lower opening of the humidity cavity body 1 is sealed through the motor mounting table 7, so that the humidity cavity has better sealing performance, can be effectively isolated from the surrounding environment, and the humidity and the pressure in the humidity cavity are stable during a friction wear test; meanwhile, the test piece is convenient to disassemble and assemble and is convenient to replace the upper test piece and the lower test piece. By arranging the humidity sensor, the humidity value in the humidity cavity during the friction wear test can be clearly and accurately obtained, the loading load value can be conveniently and accurately obtained by arranging the force measuring sensor 4, and the test result is accurate and reliable.
According to an embodiment of the present invention, the bushing 9 is further included, the bushing 9 is disposed on the upper surface of the motor mounting table 7, the bushing 9 includes a ring bottom plate 901, an outer ring vertical plate 902 and an inner ring vertical plate 903 extending upward from the ring bottom plate 901, the outer ring vertical plate 902 is disposed at a distance from the inner ring vertical plate 903, the outer ring vertical plate 902 is disposed outside the inner ring vertical plate 903, the ring bottom plate 901, the outer ring vertical plate 902 and the inner ring vertical plate 903 are formed with an annular groove, the outer ring vertical plate 902 and the inner circumferential wall of the humidity chamber are in clearance fit, for example, in small clearance fit of H6/g5, the inner ring vertical plate 903 is disposed below the rotating platform 6 and close to the lower surface of the rotating platform 6, for example, the upper surface of the inner ring vertical plate 903 is 1mm away from the lower. Set up bush 9 through on the upper surface at motor mount table 7, utilize the annular groove of bush 9 to collect the water droplet that condenses in the test process humidity chamber, protect motor shaft 8's operation, both avoided the water droplet to produce harmful effects to motor shaft 8, also prevented the pollution of water droplet to rotary platform 6. Meanwhile, the bushing 9 and the motor mounting table 7 are utilized to effectively isolate the motor from the humidity cavity.
According to a further embodiment of the invention, the motor installation platform further comprises a fixing screw 10, a counter bore and a through hole which are communicated with each other are formed in the outer ring vertical plate 902 from top to bottom, a screw hole corresponding to the through hole and the counter bore is formed in the motor installation platform 7, the fixing screw 10 is arranged in the counter bore, the through hole and the screw hole in a matched mode, the lining 9 is fastened on the motor installation platform 7, and the connection stability of the lining 9 and the motor installation platform 7 is ensured.
As shown in fig. 3, according to a further embodiment of the present invention, the inner circumferential wall of the humidity chamber includes an upper inner circumferential wall 101, a connecting wall 102 and a lower inner circumferential wall 103, which are sequentially connected from top to bottom, wherein the upper inner circumferential wall 101 is located above the annular groove, the connecting wall 102 covers the top of the outer annular vertical plate 902, so as to effectively cover the screw hole position on the outer annular vertical plate 902 of the bushing 9, thereby ensuring the tightness of the humidity chamber, and the lower inner circumferential wall 103 and the outer annular vertical plate 902 are in clearance fit, for example, in clearance fit of H6/g5, thereby ensuring the tightness of the chamber.
According to a further embodiment of the present invention, the outer peripheral surface of the rotary platform 6 is opposite to the upper inner peripheral wall 101 and spaced apart from the upper inner peripheral wall by 8-12mm, for example, by 8mm, 10mm, 12mm, thereby effectively reducing the space of the humidity chamber and improving the humidity adjustment efficiency in the humidity chamber without interfering with the rotation motion of the rotary platform 6.
According to some embodiments of the present invention, a boss 701 is disposed on the upper surface of motor mounting table 7, boss 701 is located in the annular hole of inner annular riser 903, and the outer peripheral surface of boss 701 and inner annular riser 903 are in clearance fit, for example, the clearance between the outer peripheral surface of boss 701 and inner annular riser 903 is 0.5 mm. Thereby, the mounting and position adjustment of the bush 9 are facilitated.
According to some embodiments of the present invention, the sealing cap assembly 2 comprises a sealing cap body 201 and a clamp sleeve 202, wherein the top and the bottom of the sealing cap body 201 are respectively provided with a top cap opening and a bottom cap opening, the clamp sleeve 202 seals the top cap opening, the upper end of the clamp 3 is fixed on the inner side surface of the clamp sleeve 202, the bottom cap opening of the sealing cap body 201 is communicated with the upper opening, and the lower end of the sealing cap body 201 is hermetically connected with the humidity chamber main body 1. Therefore, the humidity cavity is guaranteed to have better sealing performance. The clamp 3 is fixed with the clamp sleeve 202 and wrapped in the humidity cavity through the seal cover assembly 2, and sealing is achieved. Meanwhile, the clamp sleeve 202 provides effective support for the seal cover body 201, and the seal cover body 201 can be prevented from touching the clamp 3 to influence the measurement result.
According to a further embodiment of the present invention, the clamp sleeve 202 includes a top plate 2021 and a surrounding plate 2022 extending downward from the periphery of the top plate 2021, the lower periphery of the surrounding plate 2022 is hermetically connected to the periphery of the top cover opening of the sealing cover body 201 through a first sealing ring 203, the upper end of the clamp 3 is fixed on the inner side surface of the top plate 2021, and the outer periphery of the clamp 3 is spaced from the surrounding plate 2022 by a certain distance, for example, 5mm, so as to facilitate the assembly and position adjustment of the clamp sleeve 202. Therefore, the clamp sleeve 202 provides effective support for the seal cover body 201, and the seal cover body 201 can be prevented from touching the clamp 3 to influence the test result. Meanwhile, the coaming 2022 of the clamp sleeve 202 is hermetically connected with the periphery of the top cover opening of the sealing cover body 201 through the first sealing ring 203, so that the assembly and disassembly are convenient.
Alternatively, as shown in fig. 1 and 2, a first annular groove may be machined on the outer peripheral surface of the shroud 2022, the first sealing ring 203 is embedded in the first annular groove, and the peripheral portion of the top cover opening of the sealing cover body 201 is tightly connected in the first annular groove by the first sealing ring 203.
According to a further embodiment of the present invention, the seal cover assembly 2 further includes an end cover 204, the end cover 204 includes an upper ring 2041 and a lower ring 2042 which are coaxially connected up and down, the upper ring 2041 is sealingly connected with the periphery of the bottom cover opening of the seal cover body 201 through a second seal ring 205, the outer periphery of the lower ring 2042 is sealingly engaged with the inner periphery of the upper opening, and the clamp 3 passes through the upper ring 2041 and the lower ring 2042 in a vertically and horizontally movable manner. It can be understood that, the end cap 204 connects the sealing cover body 201 with the humidity chamber main body 1, wherein the upper ring 2041 of the end cap 204 is connected with the periphery of the bottom cover opening of the sealing cover body 201 through the second sealing ring 205 in a sealing manner, which is convenient to disassemble and assemble and simultaneously realizes a better sealing state, and the lower ring 2042 of the end cap 204 is in sealing fit with the inner peripheral surface of the upper opening, for example, by adopting a clearance fit H8/d8, which is convenient to disassemble and assemble and simultaneously realizes a better sealing state.
Optionally, a second annular groove may be machined on the outer peripheral surface of the upper ring 2041, a second sealing ring 205 is embedded in the second annular groove, and the periphery of the bottom cover opening of the sealing cover body 201 is tightly connected in the second annular groove through the second sealing ring 205.
According to a still further embodiment of the present invention, the outer diameter dimension of the upper ring 2041 is greater than the outer diameter dimension of the lower ring 2042 so that the lower bottom surface of the upper ring 2041 abuts against the outer surface of the humidity chamber body 1. Thus, positioning and installation of the end cover 204 are facilitated.
According to a further embodiment of the present invention, the sealing boot body 201 is a flexible sealing boot. Therefore, the jig 3 can be freely moved in the vertical direction and the horizontal direction during the frictional wear test.
According to a still further embodiment of the present invention, the sealing boot body 201 is made of PA film. For example, a PA film with a thickness of 20 μm can be selected. The PA film has certain flexibility, and the clamp 3 can move in the vertical direction and the horizontal direction; the PA film has high light transmittance, so that the specific position and the test piece state of the clamp 3 can be observed conveniently; and the PA film has certain water absorbability, can produce the adsorption to the water droplet that has condensed in the humidity chamber, avoids the water droplet to fall to the test area.
According to some embodiments of the present invention, further comprising a buffer blade 11, the buffer blade 11 is disposed between the load cell 4 and the clamp housing 202. By providing the damping tab 11, the load cell 4 can be protected and a quick response to normal load adjustment is facilitated.
According to some embodiments of the present invention, the humidity chamber body 1 is provided with a humidity sensor mounting hole 104, and the humidity sensor is mounted in the humidity sensor mounting hole 104, so that the installation is convenient.
According to some embodiments of the present invention, the humidity chamber body 1 is provided with a threaded hole 105 for connecting a humidity generator. Through this screw hole 105, can make things convenient for external humidity generator to adjust the humidity situation in the humidity chamber.
According to some embodiments of the present invention, the humidity chamber body 1 is made of polyurethaneurea, and the end cap 204, the bushing 9, and the clamp sleeve 202 are made of ultra-high molecular weight polyethylene. From this can improve the corrosion resistance in humidity chamber, alleviate the weight in humidity chamber, guarantee simultaneously that humidity chamber main part 1 has higher intensity, prevent that the test piece centre gripping is insecure to produce the injury to the experimenter in the experimentation.
It should be noted that, in order to ensure the sufficient strength of the parts in the above embodiments of the present invention, the wall thickness of the parts in the above embodiments of the present invention is greater than 5 mm.
According to the further embodiment of the invention, the inner circumferential surface of the humidity cavity is a circular arc surface, so that condensed water drops in the test process can be prevented from interfering with the test result, and the generated water drops are collected and discharged out of the humidity cavity through the drain valve.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (15)
1. The utility model provides a humidity chamber device of rotation type friction wear test which characterized in that includes:
the humidity chamber comprises a humidity chamber main body, wherein the humidity chamber main body defines a humidity chamber, and an upper opening and a lower opening which are communicated with the humidity chamber are formed in the humidity chamber main body;
the sealing cover assembly covers the upper opening and is connected with the humidity cavity main body in a sealing mode;
the upper end of the clamp is fixed on the inner side surface of the sealing cover assembly, the lower end of the clamp is used for fixing an upper test piece and can extend into the humidity cavity from the upper opening, and the clamp can move up and down and horizontally;
the force sensor is arranged on the outer side surface of the sealing cover assembly, is positioned above the clamp and is used for measuring the loading force applied to the clamp;
the humidity sensor is arranged on the humidity cavity body and used for measuring the humidity in the humidity cavity;
the rotating platform is horizontally arranged in the humidity cavity and is positioned below the clamp;
the motor mounting table is sealed at the lower opening;
the motor shaft vertically penetrates through the motor mounting table, the upper end of the motor shaft is fixed to the rotating platform, and the lower end of the motor shaft is connected with a motor mounted on the lower surface of the motor mounting table.
2. The humidity chamber device for the rotary friction wear test according to claim 1, further comprising a bushing, wherein the bushing is disposed on an upper surface of the motor mounting table, the bushing includes a ring bottom plate, and an outer ring vertical plate and an inner ring vertical plate extending upward from the ring bottom plate, the outer ring vertical plate and the inner ring vertical plate are disposed at an interval and are located outside the inner ring vertical plate, the ring bottom plate, the outer ring vertical plate and the inner ring vertical plate form an annular groove, the outer ring vertical plate and the inner circumferential wall of the humidity chamber are in clearance fit, and the inner ring vertical plate is located below the rotating platform and close to a lower surface of the rotating platform.
3. The humidity chamber device for the rotary friction wear test according to claim 2, further comprising a fixing screw, wherein the outer ring vertical plate is provided with a counter bore and a through hole which are communicated with each other from top to bottom, the motor mounting table is provided with a screw hole corresponding to the through hole and the counter bore, the fixing screw is arranged in the counter bore, the through hole and the screw hole in a matched manner, and the bushing is fastened on the motor mounting table.
4. The rotary type friction wear test humidity chamber device according to claim 3, wherein the inner peripheral wall of the humidity chamber comprises an upper inner peripheral wall, a connecting wall and a lower inner peripheral wall which are sequentially connected from top to bottom, wherein the upper inner peripheral wall is located above the annular groove, the connecting wall covers the top of the outer ring vertical plate, and the lower inner peripheral wall and the outer ring vertical plate are in clearance fit.
5. The humidity chamber device for rotary friction wear test according to claim 4, wherein the outer peripheral surface of the rotary platform is opposite to the upper inner peripheral wall and is separated from the upper inner peripheral wall by a space of 8-12 mm.
6. The humidity chamber device for the rotary friction wear test according to any one of claims 2 to 5, wherein a boss is arranged on the upper surface of the motor mounting table, the boss is located in the annular hole of the inner annular vertical plate, and the outer peripheral surface of the boss is in clearance fit with the inner annular vertical plate.
7. The humidity chamber device for the rotary friction wear test according to any one of claims 1 to 5, wherein the sealing cover assembly comprises a sealing cover body and a clamp sleeve, the top and the bottom of the sealing cover body are respectively provided with a top cover opening and a bottom cover opening, the clamp sleeve seals the upper cover opening, the upper end of the clamp is fixed on the inner side surface of the clamp sleeve, the bottom cover opening of the sealing cover body is communicated with the upper opening, and the lower end of the sealing cover body is hermetically connected with the humidity chamber main body.
8. The humidity chamber device for the rotary friction wear test according to claim 7, wherein the clamp sleeve comprises a top plate and an enclosing plate extending downward from the periphery of the top plate, the lower periphery of the enclosing plate is connected with the periphery of the top cover opening of the sealing cover body in a sealing mode through a first sealing ring, and the upper end of the clamp is fixed on the inner side face of the top plate.
9. The humidity chamber device for the rotary friction wear test according to claim 7, wherein the sealing cover assembly further comprises an end cover, the end cover comprises an upper ring body and a lower ring body which are coaxially connected up and down, the upper ring body is hermetically connected with the periphery of the bottom cover opening of the sealing cover body through a second sealing ring, the outer peripheral surface of the lower ring body is hermetically matched with the inner peripheral surface of the upper opening, and the clamp penetrates through the upper ring body and the lower ring body.
10. The humidity chamber device for the rotary type frictional wear test as claimed in claim 9, wherein the outer diameter of the upper ring body is larger than the outer diameter of the lower ring body, so that the lower bottom surface of the upper ring body abuts against the outer surface of the humidity chamber body.
11. The rotary friction wear test humidity chamber device of claim 7 wherein the seal housing body is a flexible seal housing.
12. The humidity chamber device for rotary friction wear test as claimed in claim 11, wherein said sealing cover body is made of PA film.
13. The rotary friction wear test humidity chamber device of claim 7 further comprising a buffer plate disposed between the load cell and the clamp sleeve.
14. The rotary friction wear test humidity chamber device according to any one of claims 1 to 5, wherein the humidity chamber body is provided with a humidity sensor mounting hole, and the humidity sensor is mounted in the humidity sensor mounting hole.
15. The humidity chamber device for the rotary type friction wear test according to any one of claims 1 to 5, wherein the humidity chamber body is provided with a threaded hole for connecting a humidity generator.
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