CN208236620U - Vacuum pump full working scope tolerance self-operated measuring unit - Google Patents
Vacuum pump full working scope tolerance self-operated measuring unit Download PDFInfo
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- CN208236620U CN208236620U CN201820506460.5U CN201820506460U CN208236620U CN 208236620 U CN208236620 U CN 208236620U CN 201820506460 U CN201820506460 U CN 201820506460U CN 208236620 U CN208236620 U CN 208236620U
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Abstract
The utility model relates to vacuum pump the field of test technology, especially a kind of vacuum pump full working scope tolerance self-operated measuring unit；Including air inlet branch lines more than inlet manifold road, 2 tunnels and survey pressure branch line, air inlet branch line is arranged in parallel the inlet end in air inlet main line, the gentle dynamic dish valve of abacus is installed on each branch line, the front end of air inlet pipeline is arranged in orifice plate, and the tolerance measurement range of the orifice plate on various inlet branch line is different；The air inlet branch line of different measurement range orifice plates is installed by switching, realize the measurement of vacuum pump full working scope tolerance, it solves the problems, such as to need manually to replace orifice plate during existing vacuum pump performance test, realize vacuum pump full working scope tolerance automatic measurement, vacuum pump test efficiency is improved, tester's labor intensity is reduced, improves the working environment of tester and the measuring device structure is simple, installation easy to process facilitates control.
Description
Technical field
The utility model relates to vacuum pump the field of test technology, especially a kind of vacuum pump full working scope tolerance automatic measurement dress
It sets.
Background technique
The speed of exhaust is important one of the performance parameter of vacuum pump.During vacuum pump comprehensive performance test, often need
Measurement suction pressure is decreased to the sucking rate of limiting pressure process intermediate pump full working scope from atmospheric pressure, obtains the sucking pressure of pump
Power -- tolerance performance curve.
Currently, frequently with orifice plate, orifice plate has structure simple for the measurement of tolerance during vacuum pump comprehensive performance test
It is single, at low cost, the advantages that not needing installation, but due to the opening diameter of each orifice plate be it is fixed, i.e., each orifice plate can be surveyed
The tolerance range of amount be it is fixed, an orifice plate be not able to satisfy the tolerance under vacuum pump full working scope measurement, so test process
The middle orifice plate for needing manually to replace different bores, one side test efficiency is low, and on the other hand there is also certain safety
Hidden danger.
To solve the above problems, the present invention designs a kind of tolerance self-operated measuring unit suitable for vacuum pump full working scope, it should
Apparatus structure is simple, automatic control easy to accomplish, and easy to process, low in cost.
Summary of the invention
Test efficiency in testing experiment of the utility model in order to solve to use the orifice plate Measuring Vacuum speed of exhaust at present
A kind of vacuum pump full working scope tolerance self-operated measuring unit that is low and there are problems that security risk, and provide.
In order to achieve the above functions, technical solution provided by the utility model is:
A kind of vacuum pump full working scope tolerance self-operated measuring unit, including air inlet branch lines more than inlet manifold road, 2 tunnels
And pressure branch line is surveyed, the quantity for surveying pressure branch line is identical as the quantity of the air inlet branch line, in which:
The inlet manifold road is connected with pneumatic control valve and pressure transmitter A in turn along gas flow direction；
The air inlet branch line is arranged in parallel the inlet end in the air inlet main line, is equipped on each branch line
The front end of the air inlet branch line, the orifice plate on various inlet branch line is arranged in orifice plate and pneumatic dish valve, the orifice plate
Tolerance measurement range it is different；
It is connected separately with survey pressure branch line on each air inlet branch line and after being located at each orifice plate, each drive test presses branch
Solenoid valve is installed, each drive test pressure branch line is connect with total pressure-measuring pipe road, is surveyed the pressure main pipe rail other end and is connected on pipeline
Pressure transmitter B.
Preferably, the quantity of the air inlet branch line is 3 tunnels, and the tolerance measurement range of 3 orifice plates covers vacuum to be measured
The entire tolerance test scope of pump.
Preferably, the vacuum pump full working scope tolerance self-operated measuring unit further include TT&C system and with the TT&C system
The industrial personal computer of connection, pressure transmitter A, pressure transmitter B, pneumatic control valve, pneumatic dish valve and solenoid valve signal wire connect
Enter the TT&C system.
Preferably, the pressure transmitter B uses relative pressure transmitter.
The utility model has the beneficial effects that: being equipped with the air inlet branched pipe of different measurement range orifice plates by switching
The measurement of vacuum pump full working scope tolerance is realized on road, and solving existing vacuum pump performance test needs manually to replace orifice plate in the process
Problem realizes vacuum pump full working scope tolerance automatic measurement, improves vacuum pump test efficiency, and it is strong to reduce tester's labour
Degree, improves the working environment of tester and the measuring device structure is simple, installation easy to process facilitates control.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is vacuum pump tolerance automatic measurement process flow diagram flow chart.
Specific embodiment
1 the utility model is further elaborated to attached drawing 2 with reference to the accompanying drawing:
Embodiment one:
A kind of vacuum pump full working scope tolerance self-operated measuring unit as shown in Figure 1, including inlet manifold road, 3 tunnel air inlets point
Bye-pass and 3 drive tests press branch line, air inlet branch line and survey pressure branch line quantity can according to the actual situation into
Row increases or decreases correspondingly, but at least cannot be below two-way.
Inlet manifold road 1 is connected with pneumatic control valve 101, pressure transmitter A102 in turn thereon.By inlet manifold road 1
After connecting with vacuum pump inlet to be measured, by adjusting pneumatic control valve 101, then the operating condition of vacuum pump to be measured can change,
The inlet pressure that vacuum pump to be measured can be measured in real time by pressure transmitter A102, passes through the design curve of vacuum pump to be measured
Inlet pressure-tolerance curve can inquire the tolerance range pumped under corresponding operating condition.
What is connect with inlet manifold road 1 has air inlet branch line 2, air inlet branch line 3 and air inlet branch line 4, three tunnels
The vertical placement side by side of air inlet branch line, and be in cross connection with inlet manifold road 1.The caliber of three tunnel air inlet branch lines
Identical and inlet is placed with the different macroporous plate 201 of aperture size, aperture plate 301 and aperture plate 401,3 orifice plates respectively
Tolerance measurement range is different, and measurement range covers the entire tolerance test scope of vacuum pump to be measured；On each branch line respectively
It is also connected with the identical Pneumatic butterfly valve 202 of bore, Pneumatic butterfly valve 302 and Pneumatic butterfly valve 402.
Survey pressure branch line 5, survey pressure branch line are connected separately on each air inlet branch line and after being located at each orifice plate
6 press with survey pressure branch line 7, each survey and are connected separately with the identical solenoid valve 501 of specifications and models, solenoid valve 601 on branch line
With solenoid valve 701, three drive tests pressure branch line is connect with total pressure-measuring pipe road 8, and total 8 other end of pressure-measuring pipe road is connected with pressure change
Send device B801.
Above-mentioned pressure transmitter A102, pressure transmitter B801, pneumatic control valve 101, Pneumatic butterfly valve 202~402 and
The signal wire of solenoid valve 501~701 accesses TT&C system 9, and TT&C system 9 is connect by Ethernet with industrial personal computer 10, observing and controlling
System 9 mainly includes several data collecting cards and signal controller, and TT&C system 9 and industrial personal computer 10 are that city buys to resell product, industrial personal computer
Measurement and control program is installed on 10, realizes the automatic collection of pressure transmitter reading and the automatic control of each valve.
Embodiment two:
It is the automatic testing procedure of vacuum pump tolerance involved in embodiment two.Before the test, usually first according to vacuum to be measured
The design parameter of pump selects the orifice plate of 2 to 3 different pore size sizes, we assume here that the orifice plate quantity selected is 3.3
Orifice plate is placed sequentially on air inlet branch line 5~7 from big to small by aperture size, and is respectively designated as macroporous plate, in
Orifice plate, aperture plate, the diameter of macroporous plate is 80mm in the present embodiment, and the diameter of aperture plate is 50mm, and the diameter of aperture plate is
25mm.Due to the aperture size of each orifice plate be it is fixed, then its tolerance measurement range is also fixed, if the tolerance of macroporous plate measures
Range is qBig min~qBig max, the tolerance measurement range of aperture plate is qMiddle min~qMiddle max, the tolerance measurement range of aperture plate is qSmall min
~qSmall max, check design curve inlet pressure-tolerance curve of pump to be measured, it divided by the tolerance measurement range of three orifice plates
At three sections, i.e., when the inlet pressure of pump to be measured is in PBig min~PBig maxWhen, then the orifice plate 5 of maximum diameter of hole is selected, gas is correspondingly opened
Dynamic butterfly valve 402 and solenoid valve 501, close Pneumatic butterfly valve 202, Pneumatic butterfly valve 302, solenoid valve 601 and solenoid valve 701；When to be measured
The inlet pressure of pump is in PMiddle min~PMiddle maxWhen, then aperture plate 6 is selected, Pneumatic butterfly valve 302 and solenoid valve 601 are correspondingly opened, is closed
Close Pneumatic butterfly valve 202, Pneumatic butterfly valve 402, solenoid valve 501 and solenoid valve 701；When the inlet pressure of pump to be measured is in PSmall min~PSmall maxWhen, then aperture plate 7 is selected, Pneumatic butterfly valve 202 and solenoid valve 701 are correspondingly opened, closes Pneumatic butterfly valve 302, Pneumatic butterfly valve
402, solenoid valve 501 and solenoid valve 601.It should be noted that due to the feelings for the overlapping of orifice plate surveying range inevitably occur
Condition, i.e. qBig min< qMiddle max, qMiddle min< qSmall max, then preferentially select tolerance value closer to the orifice plate among surveying range.
It, can be by the wherein Pneumatic butterfly valve on branch's air inlet pipeline all the way if entire test process only needs two orifice plates
And the solenoid valve of corresponding pressure-measuring pipe road is closed, and is measured using other two-way branch.If desired orifice plate quantity is more than 3
It is a, then two-way even three drive test amount branches can be enabled simultaneously in one-shot measurement, according to measurement demand, flexible combination.
The Some features of vacuum pump testing are described above, again assume that the air inlet pressure force value of test process vacuum pump to be measured from
Atmospheric pressure to limit pressure changes, and vacuum pump to be measured has been turned on and stable operation.It is specifically introduced below in conjunction with attached drawing to be measured
The tolerance measuring process of vacuum pump testing full working scope:
A kind of side that vacuum pump tolerance is tested with vacuum pump full working scope tolerance self-operated measuring unit shown in FIG. 1
Method, workflow as shown in Fig. 2, specifically include the following steps:
Step 1, vacuum pump startup to be measured and it is stable after, by 101 standard-sized sheet of regulating valve；
Step 2 opens Pneumatic butterfly valve 402 and solenoid valve 501；
Step 3 closes Pneumatic butterfly valve 202 and Pneumatic butterfly valve 302 and solenoid valve 601 and solenoid valve 701；
Step 4, waiting system acquire the reading of pressure transmitter B801, in the present embodiment, pressure transmitter after stablizing
Using relative pressure transmitter, reading is the pressure difference before and after orifice plate；
Step 5 turns down the reading P of regulating valve 101 to pressure transmitter A102VIn setting target operating condition pressure value PSRange
Interior fluctuation, i.e. PS-△PS< PV< PS+△PS；
Step 6 judges the reading P of pressure transmitter A102VThe interval range at place, if PBig min< PV< PBig maxThen select
The orifice plate 5 of maximum diameter of hole is selected, Pneumatic butterfly valve 402 and solenoid valve 501 are correspondingly opened, closes Pneumatic butterfly valve 02, Pneumatic butterfly valve
302, solenoid valve 601, and solenoid valve 701；If PMiddle min< PV< PMiddle max, then aperture plate 6 is selected, Pneumatic butterfly valve is correspondingly opened
302 and solenoid valve 601, close Pneumatic butterfly valve 202, Pneumatic butterfly valve 402, solenoid valve 501 and solenoid valve 701；If PSmall min< PV<
PSmall max, then aperture plate 7 is selected, Pneumatic butterfly valve 202 and solenoid valve 701 are correspondingly opened, closes Pneumatic butterfly valve 302, Pneumatic butterfly valve
402, solenoid valve 501, and solenoid valve 601；
Step 7 when regulating valve 101 is shut, acquires last after the system stabilizes for the limiting condition of vacuum pump to be measured
Group pressure reading, off-test.
The measurement data for a vacuum pump to be measured tested below using the utility model and through the measurement data
Tolerance after calculating:
| Orifice plate | Hole board diameter (mm) | It sucks absolute pressure (hpa) | Orifice differential pressure (hpa) | Tolerance (m3/min) |
| Aperture plate | 25 | 61 | 0 | 0 |
| Aperture plate | 25 | 80 | 14.7 | 13.419 |
| Aperture plate | 25 | 99 | 25.5 | 13.526 |
| Aperture plate | 50 | 158 | 5.9 | 15.524 |
| Aperture plate | 50 | 200 | 10.1 | 15.985 |
| Aperture plate | 50 | 249 | 17 | 16.369 |
| Aperture plate | 50 | 302 | 25.8 | 16.64 |
| Aperture plate | 50 | 350 | 36.9 | 16.917 |
| Aperture plate | 50 | 401 | 48.9 | 16.918 |
| Aperture plate | 50 | 498 | 79.2 | 16.987 |
| Macroporous plate | 80 | 602 | 17.6 | 17.326 |
| Macroporous plate | 80 | 801 | 31.5 | 17.245 |
Embodiment described above, only the preferred embodiments of the utility model, are not the implementation model to limit the utility model
It encloses, therefore all equivalent change or modifications done according to structure, feature and principle described in present utility model application the scope of the patents, it should all
It is included in the scope of the utility model patent application.
Claims (4)
1. a kind of vacuum pump full working scope tolerance self-operated measuring unit, it is characterised in that: including it is more than inlet manifold road, 2 tunnels into
Gas branch line and survey pressure branch line, the quantity and the quantity phase of the air inlet branch line for surveying pressure branch line
Together, in which:
The inlet manifold road is connected with pneumatic control valve and pressure transmitter A in turn along gas flow direction；
The air inlet branch line is arranged in parallel the inlet end in the air inlet main line, installs abacus on each branch line
With pneumatic dish valve, the front end of the air inlet branch line, the gas of the orifice plate on various inlet branch line is arranged in the orifice plate
Measurement range is different；
It is connected separately with survey pressure branch line on each air inlet branch line and after being located at each orifice plate, each drive test presses branch line
On solenoid valve is installed, each drive test pressure branch line connect with total pressure-measuring pipe road, surveys and the main pipe rail other end is pressed to be connected with pressure
Transmitter B.
2. vacuum pump full working scope tolerance self-operated measuring unit as described in claim 1, it is characterised in that: the air inlet branched pipe
The quantity on road is 3 tunnels, and the tolerance measurement range of 3 orifice plates covers the entire tolerance test scope of vacuum pump to be measured.
3. vacuum pump full working scope tolerance self-operated measuring unit as claimed in claim 1 or 2, it is characterised in that: the vacuum pump
Full working scope tolerance self-operated measuring unit further includes TT&C system and the industrial personal computer that connect with the TT&C system, pressure transmitter A,
Pressure transmitter B, pneumatic control valve, pneumatic dish valve and solenoid valve signal wire access the TT&C system.
4. vacuum pump full working scope tolerance self-operated measuring unit as claimed in claim 3, it is characterised in that: the pressure transmitter
B uses relative pressure transmitter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820506460.5U CN208236620U (en) | 2018-04-10 | 2018-04-10 | Vacuum pump full working scope tolerance self-operated measuring unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820506460.5U CN208236620U (en) | 2018-04-10 | 2018-04-10 | Vacuum pump full working scope tolerance self-operated measuring unit |
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| Publication Number | Publication Date |
|---|---|
| CN208236620U true CN208236620U (en) | 2018-12-14 |
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ID=64587666
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820506460.5U Active CN208236620U (en) | 2018-04-10 | 2018-04-10 | Vacuum pump full working scope tolerance self-operated measuring unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116337176A (en) * | 2023-05-23 | 2023-06-27 | 中国空气动力研究与发展中心高速空气动力研究所 | Extraction quantity testing method for large water ring pump parallel vacuum system |
-
2018
- 2018-04-10 CN CN201820506460.5U patent/CN208236620U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116337176A (en) * | 2023-05-23 | 2023-06-27 | 中国空气动力研究与发展中心高速空气动力研究所 | Extraction quantity testing method for large water ring pump parallel vacuum system |
| CN116337176B (en) * | 2023-05-23 | 2023-07-21 | 中国空气动力研究与发展中心高速空气动力研究所 | Extraction quantity testing method for large water ring pump parallel vacuum system |
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