CN214698276U - Inlet flow adjusting device of vacuum pump test system - Google Patents
Inlet flow adjusting device of vacuum pump test system Download PDFInfo
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- CN214698276U CN214698276U CN202023138900.2U CN202023138900U CN214698276U CN 214698276 U CN214698276 U CN 214698276U CN 202023138900 U CN202023138900 U CN 202023138900U CN 214698276 U CN214698276 U CN 214698276U
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Abstract
The utility model provides a vacuum pump test system's inlet flow adjusting device, includes the box, be equipped with air inlet and exhaust duct on the box, its characterized in that: the gas-liquid separator is characterized in that at least one large-flow gas inlet pipeline and at least one small-flow gas inlet pipeline are arranged in the box body, the gas inlet sides of the large-flow gas inlet pipeline and the small-flow gas inlet pipeline are communicated with gas flow of a gas inlet, the gas outlet sides of the large-flow gas inlet pipeline and the small-flow gas inlet pipeline are communicated with a gas exhaust pipeline, a large-flow adjusting valve is arranged on the large-flow gas inlet pipeline and used for adjusting the flow of large-flow gas, and a small-flow adjusting valve is arranged on the small-flow gas inlet pipeline and used for adjusting the flow of small-flow gas. The air inlet flow adjusting device of the vacuum pump testing system can be suitable for the whole vacuum pump with large and small flow rates, and is small in number of accessories required for testing, convenient to replace and small in workload.
Description
Technical Field
The utility model relates to a vacuum pump technical field, concretely relates to vacuum pump test system's inlet flow adjusting device.
Background
The flow rate of the vacuum pump system has wide application range, and is 5m3Min to 90m3The/min ranges are different. In the test operation process, in order to simulate the real operation working condition of a customer, the vacuum pump complete machine with different flow rates needs to switch various accessories such as different air inlet flow regulating valves, pipelines, air storage tanks and the like, and a single air inlet flow regulating scheme is designed in a targeted manner, so that the number of the accessories required by the test is large, and the workload is large.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the air inlet flow regulating device of the vacuum pump testing system is suitable for a whole vacuum pump with large and small flow rates, and is small in number of accessories required by testing, convenient to replace and small in workload.
The technical solution of the utility model is that: the utility model provides a vacuum pump test system's inlet flow adjusting device, includes the box, be equipped with air inlet and exhaust duct on the box, its characterized in that: the gas-liquid separator is characterized in that at least one large-flow gas inlet pipeline and at least one small-flow gas inlet pipeline are arranged in the box body, the gas inlet sides of the large-flow gas inlet pipeline and the small-flow gas inlet pipeline are communicated with gas flow of a gas inlet, the gas outlet sides of the large-flow gas inlet pipeline and the small-flow gas inlet pipeline are communicated with a gas exhaust pipeline, a large-flow adjusting valve is arranged on the large-flow gas inlet pipeline and used for adjusting the flow of large-flow gas, and a small-flow adjusting valve is arranged on the small-flow gas inlet pipeline and used for adjusting the flow of small-flow gas.
The large flow in the large flow air inlet pipeline and the large flow regulating valve is generally larger than DN80 corresponding to the pipe diameter, and the small flow in the small flow air inlet pipeline and the small flow regulating valve is generally smaller than DN80 corresponding to the pipe diameter.
After the method is adopted, the utility model has the advantages that:
the utility model discloses vacuum pump test system's inlet flow adjusting device sets up different inlet channel to large-traffic vacuum pump and low discharge vacuum pump respectively to utilize the valve on the inlet channel to adjust the air input, as long as inlet channel is reasonable in quantity, the flow control of the valve on each inlet channel of deuterogamying just can utilize a test system to satisfy the test requirement of the vacuum pump of various not big or small flows, and application scope is wide, and the required accessory of test is small in quantity, change convenience, work load are little.
Preferably, an expansion joint is arranged between each of the large-flow intake duct and the small-flow intake duct. The flexible connection is realized between the large-flow air inlet pipeline and the small-flow air inlet pipeline by the arrangement, so that the influence caused by vibration of the valve and the air flow can be reduced, and the installation is convenient.
Preferably, the large-flow air inlet pipeline and the small-flow air inlet pipeline are both provided with two or more than two. Aiming at a large-flow vacuum pump and a small-flow vacuum pump, two or more air inlet pipelines are arranged, so that the flow regulation range is wider, the adaptability is stronger, and the cost, the test accuracy and the efficiency are more optimized.
Preferably, a first silencer is arranged on the air inlet side of the large-flow air inlet pipeline, and a second silencer is arranged on the air inlet side of the small-flow air inlet pipeline. The arrangement can carry out noise reduction on the gas in the air inlet channel.
Preferably, two or more than two large-flow air inlet pipelines and two or more small-flow air inlet pipelines are arranged, a first air storage tank is further arranged between the air inlet side of each large-flow air inlet pipeline and the first silencer, the air inlet side of each first silencer is communicated with the air flow of the air inlet, the air outlet side of each first air storage tank is communicated with the air inlet side of each large-flow air inlet pipeline, a second air storage tank is further arranged between the air inlet side of each small-flow air inlet pipeline and the second silencer, the air inlet side of each second silencer is communicated with the air flow of the air inlet, the air outlet side of each second air storage tank is communicated with the air inlet side of each second air storage tank, and the air outlet side of each second air storage tank is communicated with the air inlet side of each small-flow air inlet pipeline. Two or more air inlet pipelines are arranged for a large-flow vacuum pump and a small-flow vacuum pump, so that the flow regulation range is wider, the adaptability is stronger, and the cost, the test accuracy and the efficiency are more optimized; and to a plurality of admission pipes, set up the gas holder, not only can stabilize the air current and further fall and make an uproar, also conveniently utilize the side of admitting air of a plurality of admission pipes of gas holder connection moreover.
Preferably, first muffler, second muffler, first gas holder, second gas holder all set up the below in the box, first muffler and first gas holder setting are in the front side of box, second muffler and second gas holder setting are in the rear side of box, the quantity of air inlet is two and sets up the top in box one side around side by side, the air inlet department that is located in the box in front is equipped with the first cavity of opening down, the air inlet department that is located the back in the box is equipped with the second cavity of opening down. This setting not only makes the part rationally distributed, can make the gas that the air inlet got into not directly get into in the box in addition, but gets into in the box through the air current passageway of L type buckle to can preliminarily fall the back of making an uproar to the gas that the air inlet got into, redisperse in the box, and all set up the air inlet in the front and back side, can make the air current homoenergetic that gets into large-traffic admission line and low discharge admission line reliably fall the noise.
Preferably, a first vacuum pressure gauge is arranged in the box body and close to the large-flow regulating valve, and a second vacuum pressure gauge is arranged in the box body and close to the small-flow regulating valve. This setting can directly perceivedly acquire the pressure value in the admission line.
Preferably, the air conditioner further comprises a third air storage tank, the air outlet sides of the large-flow air inlet pipeline and the small-flow air inlet pipeline are communicated with the air inlet side of the third air storage tank, and the air outlet side of the third air storage tank is communicated with the air exhaust pipeline. This setting can further stabilize the air current and fall and make an uproar, also conveniently utilizes the third gas holder to gather a plurality of admission lines's the side of giving vent to anger together moreover.
Preferably, the first silencer comprises an outer cylinder with two closed ends, one side of the outer cylinder is an air inlet side, the other side of the outer cylinder is an air outlet side, a first clapboard and a second clapboard are vertically arranged in the outer cylinder at intervals, the first clapboard is closer to the air inlet side than the second clapboard, a plurality of first small air inlet holes are arranged on the side surface of the outer cylinder and between the air inlet side and the first clapboard, an inner cylinder is coaxially arranged on the side, close to the air outlet side, of the second partition plate in the outer cylinder, one end, far away from the second partition plate, of the inner cylinder extends out of the outer cylinder, and a plurality of small air outlet holes are arranged on the end surface of the extending end, a plurality of second small air inlet holes are uniformly arranged on the first clapboard, a plurality of third air inlet holes are uniformly formed in the outer side of the inner barrel on the second partition plate, and a plurality of fourth air inlet holes are uniformly formed in the part, located in the outer barrel, on the side face of the inner barrel. The noise can be reduced obviously by using the mode of dispersing air inlet by uniformly distributed small holes and multi-section L-shaped tortuous channels for noise reduction.
Preferably, the second muffler is a miniature muffler, and the second muffler is provided with two or more than two mufflers which are uniformly distributed on the surface of the second air storage tank. This setting not only makes the structure smaller and exquisite, and the muffler setting is in the place of difference moreover, and the noise cancelling effect is better.
Description of the drawings:
FIG. 1 is a front perspective view of the present invention;
FIG. 2 is a schematic rear perspective view of the present invention;
FIG. 3 is a schematic view of the front three-dimensional internal structure of the present invention;
FIG. 4 is a schematic view of the rear three-dimensional internal structure of the present invention;
fig. 5 is a schematic perspective view of a first muffler of the present invention;
FIG. 6 is a top view of FIG. 5;
FIG. 7 is a cross-sectional view taken at A-A of FIG. 6;
FIG. 8 is a cross-sectional view taken at B-B of FIG. 7;
in the figure: 1-an air inlet, 2-a first silencer, 3-a box body, 4-a first air storage tank, 5-a large-flow air inlet pipeline, 6-a large-flow adjusting valve, 7-a third air storage tank, 8-a second silencer, 9-a second air storage tank, 10-a small-flow air inlet pipeline, 11-a small-flow adjusting valve, 12-1-a first vacuum pressure gauge, 12-2-a second vacuum pressure gauge, 13-an exhaust pipeline, 14-1-a first transparent observation window, 14-2-a second transparent observation window, 15-1-a first blow-down valve, 15-2-a second blow-down valve, 16-a forklift port, 17-an expansion joint, 18-a first chamber, 19-a second chamber, 20-an outer cylinder and 21-an air inlet side of the outer cylinder, 22-air outlet side of outer cylinder, 23-first clapboard, 24-second clapboard, 25-first air inlet small hole, 26-inner cylinder, 27-air outlet small hole, 28-second air inlet small hole, 29-third air inlet small hole, 30-fourth air inlet small hole, and 31-filter cotton interlayer.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and embodiments.
Example (b):
an inlet flow adjusting device of a vacuum pump testing system comprises a box body 3, wherein an air inlet 1 and an exhaust pipeline 13 are arranged on the box body 3, at least one large-flow inlet pipeline 5 and at least one small-flow inlet pipeline 10 are arranged in the box body 3, the air inlet sides of the large-flow inlet pipeline 5 and the small-flow inlet pipeline 10 are communicated with air flow of the air inlet 1, the air outlet sides of the large-flow inlet pipeline 5 and the small-flow inlet pipeline 10 are communicated with the exhaust pipeline 13, a large-flow adjusting valve 6 is arranged on the large-flow inlet pipeline 5 and used for adjusting the flow of large-flow gas, and a small-flow adjusting valve 11 is arranged on the small-flow inlet pipeline 10 and used for adjusting the flow of small-flow gas; in this embodiment, three large-flow air inlet pipes 5 are provided, four small-flow air inlet pipes 10 are provided, the specifications of the three large-flow air inlet pipes 5 and the corresponding large-flow regulating valves 6 are DN200, DN150 and DN100, and the specifications of the four small-flow air inlet pipes 10 and the corresponding small-flow regulating valves 11 are DN65, DN40, DN40 and DN 40.
Preferably, an expansion joint 17 is provided between each of the large flow rate intake duct 5 and the small flow rate intake duct 10. The arrangement realizes flexible connection between the large-flow air inlet pipeline 5 and the small-flow air inlet pipeline 10, thereby reducing the influence caused by vibration of the valve and the air flow and being convenient to install.
Preferably, two or more than two large-flow air inlet pipelines 5 and small-flow air inlet pipelines 10 are provided. Aiming at a large-flow vacuum pump and a small-flow vacuum pump, two or more air inlet pipelines are arranged, so that the flow regulation range is wider, the adaptability is stronger, and the cost, the test accuracy and the efficiency are more optimized.
Preferably, a first silencer 2 is arranged on the air inlet side of the large-flow air inlet pipe 5, and a second silencer 8 is arranged on the air inlet side of the small-flow air inlet pipe 10. The arrangement can carry out noise reduction on the gas in the air inlet channel.
Preferably, two or more than two large-flow air inlet pipes 5 and small-flow air inlet pipes 10 are provided, a first air storage tank 4 is further provided between the air inlet side of each large-flow air inlet pipe 5 and the first silencer 2, the air inlet side of each first silencer 2 is communicated with the air flow of the air inlet 1, the air outlet side of each first air storage tank 4 is communicated with the air inlet side of each large-flow air inlet pipe 5, a second air storage tank 9 is further provided between the air inlet side of each small-flow air inlet pipe 10 and the second silencer 8, the air inlet side of each second silencer 8 is communicated with the air flow of the air inlet 1, the air outlet side of each second air storage tank 9 is communicated with the air inlet side of each small-flow air inlet pipe 10, and the air outlet side of each second air storage tank 9 is communicated with the air inlet side of each small-flow air inlet pipe 10. Two or more air inlet pipelines are arranged for a large-flow vacuum pump and a small-flow vacuum pump, so that the flow regulation range is wider, the adaptability is stronger, and the cost, the test accuracy and the efficiency are more optimized; and to a plurality of admission pipes, set up the gas holder, not only can stabilize the air current and further fall and make an uproar, also conveniently utilize the side of admitting air of a plurality of admission pipes of gas holder connection moreover.
Preferably, the first muffler 2, the second muffler 8, the first air tank 4 and the second air tank 9 are all arranged below the inside of the tank 3, the first muffler 2 and the first air tank 4 are arranged on the front side of the tank 3, the second muffler 8 and the second air tank 9 are arranged on the rear side of the tank 3, the number of the air inlets 1 is two, the two air inlets are arranged above one side of the tank 3 in a front-back side-by-side manner, a first chamber 18 with a downward opening is arranged at the air inlet 1 in the front of the tank 3, and a second chamber 19 with a downward opening is arranged at the air inlet 1 in the rear of the tank 3. This setting not only makes the part rationally distributed, can make the gas that air inlet 1 got into not directly get into in the box 3 in addition, but through the air current route of L type buckle get into in the box 3 to can carry out the preliminary back of making an uproar of falling to the gas that air inlet 1 got into, redisperse in the box 3, and all set up air inlet 1 in the front and back side, can make the air current homoenergetic that gets into large-traffic admission line 5 and low flow admission line 10 reliably fall the noise.
Preferably, a first vacuum pressure gauge 12-1 is arranged in the box body 3 close to the large-flow regulating valve 6, and a second vacuum pressure gauge 12-2 is arranged in the box body 3 close to the small-flow regulating valve 11. This setting can directly perceivedly acquire the pressure value in the admission line.
Preferably, a first transparent observation window 14-1 and a second transparent observation window 14-2 are respectively arranged on the box body 3 and positioned at the first vacuum pressure gauge 12-1 and the second vacuum pressure gauge 12-2.
Preferably, the air conditioner further comprises a third air storage tank 7, the air outlet sides of the large-flow air inlet pipeline 5 and the small-flow air inlet pipeline 10 are communicated with the air inlet side of the third air storage tank 7, and the air outlet side of the third air storage tank 7 is communicated with an air outlet pipeline 13. This setting can further stabilize the air current and fall and make an uproar, also conveniently utilizes third gas holder 7 to gather the side of giving vent to anger of a plurality of admission lines together moreover.
Preferably, the first silencer 2 comprises an outer cylinder 20 with two closed ends, one side of the outer cylinder 20 is an air inlet side, the other side is an air outlet side, a first clapboard 23 and a second clapboard 24 are vertically arranged in the outer cylinder 20 at intervals, the first clapboard 23 is closer to the air inlet side than the second clapboard 24, a plurality of first small air inlet holes 25 are arranged on the side surface of the outer cylinder 20 and between the air inlet side and the first clapboard 23, an inner cylinder 26 is coaxially arranged on the side of the second partition plate 24 close to the air outlet side in the outer cylinder 20, one end of the inner cylinder 26 far away from the second partition plate 24 extends out of the outer cylinder 20, and a plurality of small air outlet holes 27 are arranged on the end surface of the extending end, a plurality of second small air inlet holes 28 are uniformly arranged on the first clapboard 23, a plurality of third small air inlet holes 29 are uniformly arranged on the second clapboard 24 and positioned on the outer side of the inner cylinder 26, the side surface of the inner cylinder 26 and the part in the outer cylinder 20 are uniformly provided with a plurality of fourth small air inlet holes 30. The noise can be reduced obviously by using the mode of dispersing air inlet by uniformly distributed small holes and multi-section L-shaped tortuous channels for noise reduction.
Preferably, a filter cotton interlayer 31 is arranged on the side surface of the outer cylinder 20 in the area corresponding to the first air inlet small hole 25. The filter cotton interlayer 31 can absorb part of noise while filtering.
Preferably, the second muffler 8 is a miniature muffler, and the second muffler 8 is provided with two or more than two mufflers, and is uniformly distributed on the surface of the second air tank 9. This setting not only makes the structure smaller and exquisite, and the muffler setting is in the place of difference moreover, and the noise cancelling effect is better.
Preferably, the first muffler 2 is provided at the bottom thereof with a first blow-off valve 15-1, and the third air container 7 is provided at the bottom thereof with a second blow-off valve 15-2. In the process of breathing in, gas cooling after muffler and gas holder has partial comdenstion water to come out, utilizes the blowoff valve can discharge the comdenstion water, uses safelyr.
Preferably, a forklift hole is formed in the bottom of the side surface of the box body 3. This arrangement facilitates movement of the housing 3.
The utility model discloses vacuum pump test system's inlet flow adjusting device's theory of operation as follows:
the air is primarily denoised by the L-shaped channel from the two air inlets 1 through the first chamber 18 and the first chamber 18, and then is dispersed into the box body 3, enters the first silencer 2 through the first air inlet small holes 25 distributed on the surface of the first silencer 2 and further reduces noise through a plurality of L-shaped channels, then enters a first gas storage tank 4 through a pipeline for preliminary pressure stabilization and noise reduction, three groups of large-flow gas inlet pipelines 5 and large-flow regulating valves 6 are distributed on the first gas storage tank 4, the size of the air inlet flow can be adjusted by adjusting the opening degrees of the three groups of large-flow adjusting valves 6, the air inlet pressure of the first vacuum pressure gauge 12-1 is observed through the first transparent observation window 14-1, the change of the pressure is conveniently, quickly and effectively observed, the gas discharged from the large-flow air inlet pipeline 5 enters the third gas storage tank 7, and enters the whole vacuum pump from the exhaust pipeline 13 after secondary pressure stabilization and noise reduction; meanwhile, small flow regulation enters a second air storage tank 9 from a second silencer 8 at the rear side, and similarly, four groups of small flow air inlet pipelines 10 and small flow regulating valves 11 are arranged, the size of the air inlet flow can be regulated by regulating the opening degrees of the four groups of small flow regulating valves 11, the air inlet pressure of a second vacuum pressure gauge 12-2 is observed through a second transparent observation window 14-2, the change of the pressure is conveniently, quickly and effectively observed, the gas coming out of the small flow air inlet pipeline 10 also enters a third air storage tank 7, and enters a vacuum pump complete machine from an exhaust pipeline 13 after secondary pressure stabilization and noise reduction; in the process of breathing in, the gas cooling after muffler and gas holder has some comdenstion water to come out, and the blowdown valve below the first muffler 2 of accessible and the gas holder carries out the drainage.
The utility model discloses the theory of operation of first muffler 2 as follows:
air passes through the first air inlet small holes 25 on the side surface of the outer barrel 20 and simultaneously passes through the filter cotton interlayer 31 to enter the outer barrel 20, the first air inlet small holes 25 are beneficial to dispersing air inlet and reducing noise, and the filter cotton interlayer 31 can absorb part of noise while filtering; then the gas goes through the second air inlet small hole 28 of the first clapboard 23 along the L-shaped route, then passes through the third air inlet small hole 29 of the second clapboard 24, then goes through the fourth air inlet small hole 30 along the L-shaped route, enters the inner cylinder 26, and finally horizontally passes through the air outlet small hole 27 and enters the exhaust pipeline 13. A plurality of "L" type inlet channel of application here, let sound carry out the noise reduction by a wide margin through the multiple reflection, gaseous constantly dispersed by a plurality of inlet aperture simultaneously, effectively reduced the gathering of noise, in addition the sound absorption effect of filter pulp intermediate layer 31 has obviously reduced the noise of admitting air.
Claims (10)
1. The utility model provides an inlet flow adjusting device of vacuum pump test system, includes box (3), be equipped with air inlet (1) and exhaust duct (13) on box (3), its characterized in that: the gas-liquid separation device is characterized in that at least one large-flow gas inlet pipeline (5) and at least one small-flow gas inlet pipeline (10) are arranged in the box body (3), the gas inlet sides of the large-flow gas inlet pipeline (5) and the small-flow gas inlet pipeline (10) are communicated with gas flow of the gas inlet (1), the gas outlet side of the large-flow gas inlet pipeline (5) is communicated with the gas exhaust pipeline (13), a large-flow adjusting valve (6) is arranged on the large-flow gas inlet pipeline (5) and used for adjusting the flow of large-flow gas, and a small-flow adjusting valve (11) is arranged on the small-flow gas inlet pipeline (10) and used for adjusting the flow of small-flow gas.
2. An intake air flow rate adjustment device of a vacuum pump test system as set forth in claim 1, wherein: expansion joints (17) are arranged between the large-flow air inlet pipeline (5) and the small-flow air inlet pipeline (10).
3. An intake air flow rate adjustment device of a vacuum pump test system as set forth in claim 1, wherein: the large-flow air inlet pipeline (5) and the small-flow air inlet pipeline (10) are respectively provided with two or more than two.
4. An intake air flow rate adjustment device of a vacuum pump test system as set forth in claim 1, wherein: the air inlet side of the large-flow air inlet pipeline (5) is provided with a first silencer (2), and the air inlet side of the small-flow air inlet pipeline (10) is provided with a second silencer (8).
5. An intake air flow rate adjustment device of a vacuum pump test system as set forth in claim 4, wherein: the large-flow air inlet pipeline (5) and the small-flow air inlet pipeline (10) are respectively provided with two or more than two, a first air storage tank (4) is arranged between the air inlet side of the large-flow air inlet pipeline (5) and the first silencer (2), the air inlet side of the first silencer (2) is communicated with the airflow of the air inlet (1), the air outlet side is communicated with the air inlet side of the first air storage tank (4), the gas outlet side of the first gas storage tank (4) is communicated with the gas inlet side of each large-flow gas inlet pipeline (5), a second air storage tank (9) is also arranged between the air inlet side of the small-flow air inlet pipeline (10) and the second silencer (8), the air inlet side of the second silencer (8) is communicated with the air flow of the air inlet (1), the air outlet side of the second silencer is communicated with the air inlet side of the second air storage tank (9), and the air outlet side of the second air storage tank (9) is communicated with the air inlet side of each small-flow air inlet pipeline (10).
6. An intake air flow rate adjustment device of a vacuum pump test system as set forth in claim 5, wherein: first muffler (2), second muffler (8), first gas holder (4), second gas holder (9) all set up the below in box (3), first muffler (2) and first gas holder (4) set up the front side in box (3), second muffler (8) and second gas holder (9) set up the rear side in box (3), the quantity of air inlet (1) is two and sets up the top in box (3) one side around side by side, be located preceding air inlet (1) department in box (3) and be equipped with first cavity (18) that the opening faced down, be located the second cavity (19) that the opening faced down in box (3) interior air inlet (1) department of back.
7. An intake air flow rate adjustment device of a vacuum pump test system according to claim 1 or 6, wherein: a first vacuum pressure gauge (12-1) is arranged in the box body (3) and close to the large-flow regulating valve (6), and a second vacuum pressure gauge (12-2) is arranged in the box body (3) and close to the small-flow regulating valve (11).
8. An intake air flow rate adjustment device of a vacuum pump test system as set forth in claim 3, wherein: the air-conditioning system is characterized by further comprising a third air storage tank (7), wherein the air outlet sides of the large-flow air inlet pipeline (5) and the small-flow air inlet pipeline (10) are communicated with the air inlet side of the third air storage tank (7), and the air outlet side of the third air storage tank (7) is communicated with an exhaust pipeline (13).
9. An intake air flow rate adjustment device of a vacuum pump test system as set forth in claim 4, wherein: the first silencer (2) comprises an outer barrel (20) with two closed ends, one side of the outer barrel (20) is an air inlet side, the other side of the outer barrel is an air outlet side, a first partition plate (23) and a second partition plate (24) are vertically arranged in the outer barrel (20) at intervals, the first partition plate (23) is closer to the air inlet side than the second partition plate (24), a plurality of first air inlet small holes (25) are formed in the side face of the outer barrel (20) and located between the air inlet side and the first partition plate (23), an inner barrel (26) is coaxially arranged on the side, close to the air outlet side, of the second partition plate (24) in the outer barrel (20), one end, far away from the second partition plate (24), of the inner barrel (26) extends out of the outer barrel (20), a plurality of second air inlet small holes (27) are formed in the end face of the extending end, a plurality of second air inlet small holes (28) are uniformly formed in the first partition plate (23), a plurality of third air inlet holes (29) are uniformly formed in the second partition plate (24) and positioned on the outer side of the inner cylinder (26), and a plurality of fourth air inlet holes (30) are uniformly formed in the side surface of the inner cylinder (26) and positioned in the outer cylinder (20).
10. An intake air flow rate adjustment device of a vacuum pump test system as set forth in claim 4, wherein: the second silencer (8) is a miniature silencer, the second silencer (8) is provided with two or more than two silencers, and the silencers are uniformly distributed on the surface of the second gas storage tank (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023138900.2U CN214698276U (en) | 2020-12-22 | 2020-12-22 | Inlet flow adjusting device of vacuum pump test system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023138900.2U CN214698276U (en) | 2020-12-22 | 2020-12-22 | Inlet flow adjusting device of vacuum pump test system |
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| CN214698276U true CN214698276U (en) | 2021-11-12 |
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| CN202023138900.2U Active CN214698276U (en) | 2020-12-22 | 2020-12-22 | Inlet flow adjusting device of vacuum pump test system |
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| CN (1) | CN214698276U (en) |
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