CN214096580U - Air valve service life testing device - Google Patents
Air valve service life testing device Download PDFInfo
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- CN214096580U CN214096580U CN202022977757.XU CN202022977757U CN214096580U CN 214096580 U CN214096580 U CN 214096580U CN 202022977757 U CN202022977757 U CN 202022977757U CN 214096580 U CN214096580 U CN 214096580U
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Abstract
The utility model provides a pneumatic valve life test device, pneumatic valve life test device includes the body, the body includes: the air inlet cavity, the middle cavity, the exhaust cavity, the path switching mechanism, the air valve fixing part and the window are arranged in the air inlet cavity; the air valve fixing part is used for fixing an air valve to be tested, a middle cavity is arranged at the rear end of the air valve fixing part, a path switching mechanism is arranged at the front end of the air valve fixing part, and the path switching mechanism comprises a driving unit, a first path and a second path; at any time, the driving unit is used for moving the first passage between the air inlet cavity and the air valve fixing part so as to enable the air inlet cavity, the first passage, the air valve to be tested and the middle cavity to be communicated in sequence, or moving the second passage between the air outlet cavity and the air valve fixing part so as to enable the air outlet cavity, the second passage, the air valve to be tested and the middle cavity to be communicated; the window is aligned with the air valve fixing part and used for observing a valve plate of the air valve to be tested.
Description
Technical Field
The utility model belongs to the technical field of the technique that the pneumatic valve detected and specifically relates to a pneumatic valve life test device is related to.
Background
The gas valve is one of the core components of the positive displacement compressor, and the working performance and the service life of the gas valve directly influence the overall performance and the service life of the compressor.
At present, no test device specially aiming at the service life test of the air valve of the compressor exists in China, the test is mostly carried out on the whole compressor, the cost is higher, and the accelerated service life test cannot be carried out.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an air valve life test device to alleviate among the prior art and directly test the higher technical problem of cost on the compressor.
The embodiment of the utility model provides a pair of pneumatic valve life test device, pneumatic valve life test device includes the body, the body includes: the air inlet cavity, the middle cavity, the exhaust cavity, the path switching mechanism, the air valve fixing part and the window are arranged in the air inlet cavity;
the air valve fixing part is used for fixing an air valve to be tested, the rear end of the air valve fixing part is provided with an intermediate cavity, the front end of the air valve fixing part is provided with a path switching mechanism, the path switching mechanism comprises a driving unit, a first path and a second path, and at any time, the driving unit is used for moving the first path to a position between the air inlet cavity and the air valve fixing part so as to enable the air inlet cavity, the first path, the air valve to be tested and the intermediate cavity to be communicated in sequence, or moving the second path to a position between the air outlet cavity and the air valve fixing part so as to enable the air outlet cavity, the second path, the air valve to be tested and the intermediate cavity to be communicated;
the window is aligned with the air valve fixing part and used for observing a valve plate of the air valve to be tested.
Further, the body comprises a shell, a middle end cover and a rear end cover which are sequentially connected, the middle end cover comprises mounting holes penetrating through the front end face and the rear end face of the middle end cover, and the mounting holes form the air valve fixing part;
the path switching mechanism comprises a rotatable gas distribution disc, the gas distribution disc is positioned between the middle end cover and the shell, a through hole penetrating through the front surface and the rear surface of the gas distribution disc is formed in the gas distribution disc, and the through hole forms the first path; a groove body extending outwards along the radial direction of the gas distribution plate is arranged on the rear end face of the gas distribution plate, and the groove body forms the second passage;
a gap between the front surface of the air distribution plate and the shell forms an air inlet cavity; the intermediate end cover and the shell form the exhaust cavity; the middle end cap and the rear end cap form the middle cavity; the window is located on the rear end cap.
Furthermore, the number of the air valve fixing parts, the first passages and the second passages is multiple and corresponds to one another.
Furthermore, the path switching mechanism comprises a gas distribution block, the gas distribution block is used for being installed at an opening of one end, close to the middle end cover, of the first passage, a gas guide hole is formed in the gas distribution block, the shape of the cross section of the gas guide hole comprises a straight edge, and the straight edge is firstly intersected with the gas valve to be tested when the gas guide hole is in rotating coincidence with the gas valve to be tested.
Furthermore, the gas distribution plate is in clearance fit with the shell and the middle end cover respectively.
Furthermore, the driving unit comprises a rotating shaft, the rotating shaft penetrates through the air inlet cavity to be connected with the air distribution plate, a front bearing and a rear bearing are arranged in the shell at intervals, and the rotating shaft is installed in the front bearing and the rear bearing.
Furthermore, an input port of lubricating oil mist positioned between the front bearing and the rear bearing is arranged on the shell;
the rotary shaft is arranged in the shell, the rotary shaft penetrates through the support, a shaft seal is arranged between the support and the rotary shaft, and the shaft seal is used for preventing lubricating oil from entering the air inlet cavity and sealing compressed air in the air inlet cavity.
Furthermore, the air valve service life testing device comprises a first regulating valve, and the first regulating valve is connected with the air inlet of the air inlet cavity and used for regulating the pressure of the air inlet cavity.
Furthermore, the air valve service life testing device comprises a second regulating valve, and the second regulating valve is communicated with the middle cavity and used for regulating the pressure of the middle cavity.
Further, the air valve service life testing device comprises a laser Doppler vibration meter, and the laser Doppler vibration meter is used for detecting the motion state of the valve plate of the air valve to be tested through the window.
The embodiment of the utility model provides an air valve life test device includes the body, the body includes: the air inlet cavity, the middle cavity, the exhaust cavity, the path switching mechanism, the air valve fixing part and the window are arranged in the air inlet cavity; the air valve fixing part is used for fixing an air valve to be tested, the rear end of the air valve fixing part is provided with an intermediate cavity, the front end of the air valve fixing part is provided with a path switching mechanism, the path switching mechanism comprises a driving unit, a first path and a second path, and at any time, the driving unit is used for moving the first path to a position between the air inlet cavity and the air valve fixing part so as to enable the air inlet cavity, the first path, the air valve to be tested and the intermediate cavity to be communicated in sequence, or moving the second path to a position between the air outlet cavity and the air valve fixing part so as to enable the air outlet cavity, the second path, the air valve to be tested and the intermediate cavity to be communicated; the window is aligned with the air valve fixing part and used for observing a valve plate of the air valve to be tested. The device has the following use principle that the air valve to be tested can be installed on the air valve fixing part, then the first passage in the path changing mechanism is enabled to move to a position between the air inlet cavity and the air valve fixing part by adjusting the path changing mechanism, the air inlet cavity, the first passage, the air valve to be tested and the middle cavity are sequentially communicated, the air in the air inlet cavity pushes the air valve to be tested away after passing through the first passage, then the air valve to be tested enters the middle cavity, and a certain pressure is formed in the middle cavity; when the first passage is moved away from the position between the air inlet cavity and the air valve fixing part by adjusting the path changing mechanism, the air inlet cavity is disconnected with the middle cavity; after the second passage moves to a position between the exhaust cavity and the air valve fixing part by adjusting the path switching mechanism, the exhaust cavity, the second passage, the air valve to be tested and the middle cavity are communicated, the air valve to be tested is closed by the gas in the middle cavity, and then the gas is exhausted from the exhaust cavity. The air inlet cavity, the middle cavity and the air exhaust cavity are communicated in a time-sharing mode by repeatedly switching the state of the path switching mechanism, the air valve to be tested is opened and closed, in the process, the motion state of the valve block of the air valve to be tested can be collected through the window, and the performance of the air valve to be tested is analyzed through the motion state of the valve block.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a cross-sectional view of a body of a gas valve life testing apparatus provided in an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of the M position of FIG. 1;
fig. 3 is a schematic view of a gas distribution plate of a gas valve life testing apparatus provided in an embodiment of the present invention;
fig. 4 is a schematic view of the air inlet cavity and the middle cavity of the body of the air valve service life testing device provided by the embodiment of the present invention when they are communicated;
fig. 5 is a schematic view of the gas valve life test apparatus provided in the embodiment of the present invention when the middle chamber and the exhaust chamber of the body are communicated;
fig. 6 is a schematic view of a gas valve life testing apparatus provided by the embodiment of the present invention.
Icon: 110-an air intake chamber; 120-an intermediate chamber; 130-an exhaust chamber; 200-a housing; 210-a scaffold; 220-shaft seal; 230-a front bearing; 240-rear bearing; 250-a rotating shaft; 300-intermediate end cap; 400-rear end cap; 410-a window; 500-a gas valve to be tested; 610-gas distribution plate; 611-through holes; 612-a trough body; 700-gas distribution lining; 800-gas distribution block; 810-straight side; 910-a pressure sensor; 920-a drive unit; 930-laser doppler vibrometer; 940-a second regulating valve; 950-a first regulating valve; 960-muffler.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The embodiment of the utility model provides an air valve life test device can carry out impact action fatigue test to compressor air valve (including fungus form valve, cyclic annular valve, netted valve etc.), through adjusting inlet pressure, can realize the motion law of simulation different operating mode compressor air valves to possess the ability of test with higher speed, the motion law accessible sensor of valve block is convenient tests in the testing process.
As shown in fig. 1 to 6, the body includes: the air inlet cavity 110, the middle cavity 120, the air outlet cavity 130, the path switching mechanism, the air valve fixing part and the window 410. The air inlet cavity 110 is communicated with an air inlet, the outer end of the air inlet can be connected with an air source, and a first regulating valve 950 can be arranged between the air source and the air inlet and used for regulating the pressure of the air inlet cavity 110, so that the maximum pressure value applied to the front port of the air valve 500 to be tested is regulated, and the test parameters are conveniently regulated. The first regulator valve 950 may be a pressure reducing valve. An air inlet isolating valve can be arranged between the air source and the air inlet and used for connecting or disconnecting the air source.
The exhaust chamber 130 is provided with an exhaust port, which can communicate with the atmosphere through a muffler 960 for reducing noise during exhaust.
The air valve fixing part is used for fixing an air valve 500 to be tested, the rear end of the air valve fixing part is provided with a middle cavity 120, and the rear port of the air valve 500 to be tested is communicated with the middle cavity 120.
The front end of the air valve fixing part is provided with a path switching mechanism, the path switching mechanism comprises a driving unit 920, a first path and a second path, and at any time, the driving unit is used for moving the first path between the air inlet cavity 110 and the air valve fixing part so as to enable the air inlet cavity 110, the first path, the air valve 500 to be tested and the middle cavity 120 to be communicated in sequence, or moving the second path between the air outlet cavity 130 and the air valve fixing part so as to enable the air outlet cavity 130, the second path, the air valve 500 to be tested and the middle cavity 120 to be communicated; the window 410 is aligned with the air valve fixing part, and the window 410 is used for observing a valve plate of the air valve 500 to be tested.
The use principle of the device is as follows: before testing, the gas valve 500 to be tested is mounted on the gas valve fixing part, then the path changing mechanism is adjusted to enable the first path in the path changing mechanism to move between the gas inlet cavity 110 and the gas valve fixing part, the gas inlet cavity 110, the first path, the gas valve 500 to be tested and the middle cavity 120 are sequentially communicated, gas in the gas inlet cavity 110 pushes away the gas valve 500 to be tested after passing through the first path, then the gas valve 500 to be tested enters the middle cavity 120, and certain pressure is formed in the middle cavity 120; when the first path is removed from between the air inlet cavity 110 and the valve fixing part by adjusting the path changing mechanism, the air inlet cavity 110 is disconnected from the middle cavity 120; after the second passage moves to a position between the exhaust cavity 130 and the gas valve fixing part by adjusting the path switching mechanism, the exhaust cavity 130, the second passage, the gas valve 500 to be tested and the middle cavity 120 are communicated, the gas valve 500 to be tested is closed by the gas in the middle cavity 120, and then the gas is exhausted from the exhaust cavity 130. The air inlet cavity 110, the middle cavity 120 and the air outlet cavity 130 are conducted in a time-sharing mode by repeatedly switching the state of the path switching mechanism, so that the air valve 500 to be tested is opened and closed, in the process, the motion state of a valve plate of the air valve 500 to be tested can be acquired by using the window 410, and the performance of the air valve 500 to be tested is analyzed through the motion state of the valve plate.
The air valve service life testing device comprises a shell 200, an intermediate end cover 300 and a rear end cover 400 which are sequentially connected, wherein the intermediate end cover 300 comprises mounting holes penetrating through the front end face and the rear end face of the intermediate end cover, and the mounting holes form the air valve fixing part; the switching mechanism comprises a rotatable gas distribution plate 610, the gas distribution plate 610 is positioned between the middle end cover 300 and the shell 200, a through hole 611 penetrating through the front surface and the rear surface of the gas distribution plate 610 is formed in the gas distribution plate 610, and the through hole 611 forms the first passage; a groove body 612 extending outwards along the radial direction of the rear end face of the air distribution plate 610 is arranged on the rear end face of the air distribution plate, and the groove body 612 forms the second passage; the gap between the front surface of the gas panel 610 and the housing 200 forms an intake chamber 110; the middle end cap 300 and the housing 200 form the exhaust chamber 130; the middle end cap 300 and the rear end cap 400 form the middle chamber 120; the window 410 is located on the rear end cap 400.
Specifically, in this embodiment, a specific structure of the air valve life testing apparatus is provided, in which the housing 200, the middle end cap 300, and the rear end cap 400 are sequentially and hermetically connected together. The air valve 500 to be tested is installed in the installation hole of the middle end cap 300, the front end of the air valve 500 to be tested is opened towards the air distribution plate 610, and the rear end is opened towards the middle cavity 120. The gas distribution plate 610 and the middle end cover 300 are coaxial, the gas distribution plate 610 can rotate under the driving of the driving unit 920, so that the through hole 611 on the gas distribution plate 610 is aligned with the front end opening of the air valve 500 to be tested, when the through hole 611 on the gas distribution plate 610 is aligned with the front end opening of the air valve 500 to be tested, the air inlet cavity 110, the through hole 611, the air valve 500 to be tested and the middle cavity 120 are sequentially communicated, and the air valve 500 to be tested is opened; when the slot body 612 on the gas distribution plate 610 rotates to be aligned with the front end opening of the air valve 500 to be tested, the outer end opening of the slot body 612 is communicated with the exhaust cavity 130, the middle cavity 120, the air valve 500 to be tested, the slot body 612 and the exhaust cavity 130 are sequentially communicated, and the air valve 500 to be tested is closed. During the rotation of the gas panel 610, the gas valve 500 to be tested is repeatedly switched between the open and closed states. The window 410 is positioned on the rear end cover 400, the window 410 faces the middle end cover 300, and the laser doppler vibrometer 930 positioned outside the window 410 can acquire the motion state of the valve plate through the window 410. The motion law of the valve plate can be measured in a non-contact mode through the observation window 410, and the relation between the motion law of the valve plate and the pressure difference of each chamber can be calibrated accurately.
The gap between the front surface of the gas panel 610 and the housing 200 forms an intake chamber 110; the middle end cap 300 and the housing 200 form the exhaust chamber 130; the middle cap 300 and the rear cap 400 form the middle chamber 120. The gas distribution bushing 700 is mounted on one surface of the housing 200 facing the middle end cover 300, the gas distribution bushing 700 is an auxiliary part and used for adjusting a gap between parts, the gas distribution disc 610 is sleeved in the gas distribution bushing 700, and a gap a is formed between the gas distribution disc 610 and the gas distribution bushing 700 in the radial direction; in the axial direction, a clearance B exists between the gas distribution disk 610 and the end face of the gas distribution bushing 700, and a clearance C exists between the gas distribution disk 610 and the middle end cover 300. The gap B and the gap C may be adjusted by a spacer between the gas panel 610 and the rotation shaft 250. Because of the gaps A, B and C, the gas panel 610 experiences less resistance, thereby making the rotation of the gas panel 610 smoother.
The air distribution bush 700 is made of Polytetrafluoroethylene (PTFE) or brass + graphite and other self-lubricating materials.
The rear end cover 400 is provided with a high-transmittance ya keli plate for forming a window 410 for capturing the valve plate motion rule of the air valve 500 to be tested by the laser doppler vibrometer 930.
The number of the air valve fixing parts, the first passages and the second passages is multiple and corresponds to one another.
In this embodiment, the number of the air valve fixing portions, the first passages and the second passages is two, and the air distribution plate 610 can simultaneously detect two air valves 500 to be tested. The gas distribution plate 610 is provided with 2 through holes 611 and 2 groove bodies 612, the through holes 611 adopt circular hole channels, and the groove bodies 612 adopt rectangular grooves.
The number of the air valve fixing part, the first passage and the second passage can be three, four or more according to requirements.
The path changing mechanism comprises a gas distribution block 800, the gas distribution block 800 is used for being installed at an opening of one end, close to the middle end cover 300, of the first passage, a gas guide hole is formed in the gas distribution block 800, the shape of the cross section of the gas guide hole comprises a straight edge 810, and the straight edge 810 is firstly intersected with the gas valve 500 to be tested when the gas guide hole is in rotating coincidence with the gas valve 500 to be tested.
The gas distribution block 800 may be mounted on the rear end face of the gas distribution plate 610 by screws, and the gas distribution block 800 is made of a lightweight wear-resistant material, such as Polyetheretherketone (PEEK). The air guide hole on the air distribution plate 610 is aligned with the through hole 611 on the air distribution plate 610, and the cross section of the air guide hole comprises a straight edge 810, so that when the air distribution plate 610 rotates, the air guide hole will gradually coincide with the air valve 500 to be tested, because the edge of the air guide hole which is intersected with the air valve 500 to be tested is set as the straight edge 810, the first channel can be quickly coincided with the air valve 500 to be tested, and the air valve can be opened quickly. In this embodiment, the cross-section of the air-guide hole is D-shaped. In other embodiments, the cross-sectional shape of the air-guide holes is rectangular, or the like.
The driving unit 920 includes a rotating shaft 250, the rotating shaft 250 passes through the air intake chamber 110 and is connected to the air distribution plate 610, a front bearing 230 and a rear bearing 240 are disposed in the housing 200 at intervals, and the rotating shaft 250 is mounted in the front bearing 230 and the rear bearing 240. The front bearing 230 and the rear bearing 240 are angular contact ball bearings, and the bearings can be self-lubricated bearings or common angular contact ball bearings and adopt an oil mist lubrication mode.
The housing 200 is provided with an inlet for a lubricant mist between the front bearing 230 and the rear bearing 240; a bracket 210 is disposed in the housing 200, and the bracket 210 is used for mounting a shaft seal 220. The rotating shaft 250 penetrates through the bracket 210, a shaft seal 220 is arranged between the bracket 210 and the rotating shaft 250, and the shaft seal 220 is used for preventing lubricating oil from entering the air inlet cavity 110 and sealing compressed air in the air inlet cavity 110. The shaft seal 220 has the capability of enduring a relative linear velocity of 5.6m/s for a long time, sealing an air pressure of not less than 1Mpa, and requiring no lubrication.
The gas valve life test apparatus includes a second regulating valve 940, the second regulating valve 940 is communicated with the middle chamber 120, and the second regulating valve 940 is communicated with the atmosphere for regulating the pressure of the middle chamber 120, so that the difference between the intake pressure and the pressure of the middle chamber 120 can be changed.
The air valve life test device comprises a laser Doppler vibration meter 930, and the laser Doppler vibration meter 930 is used for detecting the motion state of the valve plate of the air valve 500 to be tested through the window 410. In the initial test, the motion rule of the valve plate is calibrated by debugging different pressures of all the chambers and the rotating speed of the rotating shaft 250 and utilizing the laser Doppler vibration meter 930 under different conditions. After calibration is completed, the pressure of different chambers can be adjusted as required, and different valve plate impact speeds can be realized.
The driving unit 920 can be a brushless direct current motor, and can conveniently perform an air valve service life acceleration test by adjusting the rotating speed of the motor, wherein the highest test frequency can reach 100Hz, which is far beyond the switching frequency of an air valve of a general displacement compressor.
The air valve service life testing device also comprises a controller which is respectively connected with the two sensors and can collect pressure signals.
The gas distribution plate 610 is made of 2A-12 aviation aluminum alloy, so that the weight is reduced on the premise of having certain mechanical property, the rotational inertia of the whole shafting is reduced, and the load of the motor is further reduced.
The device can adopt an air source of 0.8 Mpa-1 Mpa, is driven by low-pressure compressed air, realizes the accelerated life test of the high-pressure compressor air valve, and has low test power consumption, low cost and short period.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. The utility model provides a pneumatic valve life test device which characterized in that, pneumatic valve life test device includes the body, the body includes: the air inlet cavity (110), the middle cavity (120), the air exhaust cavity (130), the path switching mechanism, the air valve fixing part and the window (410);
the air valve fixing part is used for fixing an air valve (500) to be tested, the rear end of the air valve fixing part is provided with a middle cavity (120), the front end of the air valve fixing part is provided with a path switching mechanism, and the path switching mechanism comprises a driving unit (920), a first path and a second path; at any time, the driving unit is used for moving the first passage between the air inlet cavity (110) and the air valve fixing part so as to enable the air inlet cavity (110), the first passage, the air valve (500) to be tested and the middle cavity (120) to be communicated in sequence, or moving the second passage between the air outlet cavity (130) and the air valve fixing part so as to enable the air outlet cavity (130), the second passage, the air valve (500) to be tested and the middle cavity (120) to be communicated;
the window (410) is aligned with the air valve fixing part, and the window (410) is used for observing a valve plate of the air valve (500) to be tested.
2. The air valve service life testing device of claim 1, wherein the body comprises a shell (200), an intermediate end cover (300) and a rear end cover (400) which are connected in sequence, the intermediate end cover (300) comprises mounting holes penetrating through the front end surface and the rear end surface of the intermediate end cover, and the mounting holes form the air valve fixing part;
the path switching mechanism comprises a rotatable gas distribution disc (610), the gas distribution disc (610) is located between the middle end cover (300) and the shell (200), a through hole (611) penetrating through the front surface and the rear surface of the gas distribution disc (610) is formed in the gas distribution disc (610), and the through hole (611) forms the first path; a groove body (612) extending outwards along the radial direction of the rear end face of the air distribution disc (610) is arranged on the rear end face of the air distribution disc, and the groove body (612) forms the second passage;
a gap between the front surface of the gas distribution plate (610) and the housing (200) forms a gas inlet cavity (110); the intermediate end cap (300) and the housing (200) form the exhaust cavity (130); the middle end cap (300) and the rear end cap (400) form the middle cavity (120); the window (410) is located on the rear end cap (400).
3. The air valve service life testing device according to claim 2, wherein the number of the air valve fixing parts, the first passages and the second passages is multiple and is in one-to-one correspondence.
4. The air valve life test device according to claim 2, wherein the path switching mechanism comprises an air distribution block (800), the air distribution block (800) is used for being installed at an opening of the first path close to one end of the middle end cover (300), an air guide hole is formed in the air distribution block (800), the shape of the cross section of the air guide hole comprises a straight edge (810), and the straight edge (810) is firstly intersected with the air valve to be tested (500) when the air guide hole is in rotating superposition with the air valve to be tested (500).
5. The air valve life test device as claimed in claim 2, wherein the air distribution plate (610) is in clearance fit with the shell (200) and the middle end cover (300) respectively.
6. The air valve service life testing device of claim 2, wherein the driving unit (920) comprises a rotating shaft (250), the rotating shaft (250) penetrates through the air inlet cavity (110) to be connected with the air distribution plate (610), a front bearing (230) and a rear bearing (240) are arranged in the shell (200) at intervals, and the rotating shaft (250) is installed in the front bearing (230) and the rear bearing (240).
7. The air valve life test device according to claim 6, characterized in that the housing (200) is provided with an inlet port for the lubricant mist between the front bearing (230) and the rear bearing (240);
a support (210) is arranged in the shell (200), the rotating shaft (250) penetrates through the support (210), a shaft seal (220) is arranged between the support (210) and the rotating shaft (250), and the shaft seal (220) is used for preventing lubricating oil from entering the air inlet cavity (110) and sealing compressed air in the air inlet cavity (110).
8. The air valve life test device according to claim 2, characterized in that the air valve life test device comprises a first adjusting valve (950), and the first adjusting valve (950) is connected with the air inlet of the air inlet cavity (110) and is used for adjusting the pressure of the air inlet cavity (110).
9. The gas valve life test device of claim 2, comprising a second regulating valve (940), the second regulating valve (940) being in communication with the intermediate chamber (120) for regulating the pressure of the intermediate chamber (120).
10. The air valve life test device of claim 1, comprising a laser Doppler vibration meter (930), wherein the laser Doppler vibration meter (930) is used for detecting the motion state of a valve plate of the air valve (500) to be tested through the window (410).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022977757.XU CN214096580U (en) | 2020-12-08 | 2020-12-08 | Air valve service life testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022977757.XU CN214096580U (en) | 2020-12-08 | 2020-12-08 | Air valve service life testing device |
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| CN214096580U true CN214096580U (en) | 2021-08-31 |
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| CN202022977757.XU Active CN214096580U (en) | 2020-12-08 | 2020-12-08 | Air valve service life testing device |
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| CN (1) | CN214096580U (en) |
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