CN106768811A - High-frequency induction wind-tunnel vacuum pressure regulating system and pressure regulating method - Google Patents
High-frequency induction wind-tunnel vacuum pressure regulating system and pressure regulating method Download PDFInfo
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- CN106768811A CN106768811A CN201710104210.9A CN201710104210A CN106768811A CN 106768811 A CN106768811 A CN 106768811A CN 201710104210 A CN201710104210 A CN 201710104210A CN 106768811 A CN106768811 A CN 106768811A
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- 230000006698 induction Effects 0.000 title claims abstract description 32
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000005273 aeration Methods 0.000 claims abstract description 10
- 238000012360 testing method Methods 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 230000003068 static effect Effects 0.000 claims description 8
- 230000006641 stabilisation Effects 0.000 claims description 7
- 238000011105 stabilization Methods 0.000 claims description 7
- 230000008676 import Effects 0.000 claims description 6
- 239000000498 cooling water Substances 0.000 claims description 5
- 238000002955 isolation Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 230000033228 biological regulation Effects 0.000 abstract description 3
- 238000013461 design Methods 0.000 description 7
- 238000002474 experimental method Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/02—Wind tunnels
- G01M9/04—Details
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
High-frequency induction wind-tunnel vacuum pressure regulating system and pressure regulating method, vacuum pressure regulating system include 200 liter/second vavuum pumps, 300 liter/second vavuum pumps, 600 liter/second vavuum pumps, 1800 liter/second vavuum pumps, 5000 liter/second vavuum pumps, low vacuum flapper valve, cap of high-vacuum baffle valve, vacuum meter, aeration valve, first pressure sensor, second pressure sensor and electric check valve.When high-frequency induction wind-tunnel needs rough vacuum (i.e. 20~100kpa), the less vacuum pump operation of first three groups draft；When high-frequency induction wind-tunnel needs condition of high vacuum degree (i.e.≤20kpa), five groups of vavuum pumps run simultaneously, realize maximum draft, meet wind tunnel operation needs.Present invention is mainly applied to the regulation of high-frequency induction wind-tunnel vacuum pressure, the technical requirements such as the high-power igniting of high-frequency induction heating wind-tunnel, long-play are realized.
Description
Technical field
The present invention relates to high-frequency induction wind-tunnel vacuum pressure regulating system and pressure regulating method, belong to space flight ground simulation
Test air tunnel technical field.
Background technology
High-frequency induction heating wind-tunnel be in order to meet Gao Han, hot-fluid high and the new terrestrial solar heat protection test platform researched and developed, it
The features such as with flow field stabilization, pure hot gas, enthalpy high, be a kind of new space flight ground solar heat protection modelling technique.For
Ensure the operation of this wind-tunnel, vacuum condition is one of deciding factor.The control method of high-frequency induction wind-tunnel vacuum pressure regulation
The key technology that exactly guarantee test is lighted a fire and run.
Because high-frequency induction wind-tunnel needs high vacuum to start, while need to carry out long-time examination in low vacuum environment again
Test, most of high-frequency induction wind-tunnel of prior art can not meet the startup of below 100Pa high vacuum, can frequent breakage heater master
Body device, and ignition success rate is relatively low.After lighting a fire successfully, prior art can not in time adjust vacuum environment (i.e. in Gao Zhen again
Free switching between empty and low vacuum), experiment is not reached required parameters state.
The content of the invention
Technology solve problem of the invention is：Overcome the deficiencies in the prior art, there is provided high-frequency induction wind-tunnel vacuum pressure is adjusted
Section system and pressure regulating method, the vacuum test environment needed for realizing high-frequency induction heating wind-tunnel, can high vacuum with it is low
Free switching between vacuum, it is ensured that its smooth ignition and for a long time stable operation of experiment.
Technical solution of the invention is：High-frequency induction wind-tunnel vacuum pressure regulating system, including 200 liter/second vacuum
Pump, 300 liter/second vavuum pumps, 600 liter/second vavuum pumps, 1800 liter/second vavuum pumps, 5000 liter/second vavuum pumps, low vacuum baffle plate
Valve, cap of high-vacuum baffle valve, vacuum meter, aeration valve, first pressure sensor, second pressure sensor and electric check valve；
High-frequency induction wind-tunnel is connected by pipeline and vacuum meter one end, the vacuum meter other end simultaneously with one end of aeration valve and
Cap of high-vacuum baffle valve import is connected, and the outlet of cap of high-vacuum baffle valve is sequentially connected 5000 liter/second vavuum pumps and 1800 by pipeline
Liter/second vavuum pump, 1800 liter/second vavuum pumps are connected with the one outlet of low vacuum flapper valve, and the other end of aeration valve is true with low
The import connection of neutral plate valve, another outlet of low vacuum flapper valve is sequentially connected 600 liter/second vavuum pumps, 300 by pipeline
Liter/second vavuum pump and 200 liter/second vavuum pumps, 200 liter/second vavuum pumps are connected by muffler with air；
Tank is connected by inlet pipeline with the water inlet of 300 liter/second vavuum pumps and 1800 liter/second vavuum pumps, described
First pressure sensor, electric check valve and second pressure sensor, 1800 liter/second vavuum pumps are disposed with inlet pipeline
Delivery port be connected with the water inlet of 600 liter/second vavuum pumps, the delivery port of 300 liter/second vavuum pumps and 200 liter/second vavuum pumps
Water inlet is connected, and the delivery port of the delivery port of 600 liter/second vavuum pumps and 200 liter/second vavuum pumps passes through outlet pipeline and water storage
Pond connects.
Also include upper computer control system, PLC, temperature sensor and pressure sensor, PLC gathers each vavuum pump
Electric current, voltage data, and upper computer control system is transferred to, temperature sensor gathers the temperature of each vavuum pump and is transferred to
Upper computer control system, pressure sensor gathers the cooling water pressure of each vavuum pump, and upper computer control system is in vavuum pump
Electric current, voltage, temperature or cooling water pressure alarmed when exceeding default threshold value.
The vacuum pressure regulating system is designed with the shielding quarantine measures of anti-electromagnetic interference, and vavuum pump and PLC it
Between, between PLC and temperature sensor, photoelectric isolation module is designed between PLC and pressure sensor.
Also include frequency conversion parameter control module, the frequency conversion parameter for each vavuum pump to be set or changed.
Pressure controlled method is carried out using the vacuum pressure regulating system, is comprised the following steps：
(5.1) when running Low-vacuum mode, low vacuum flapper valve is opened, closes cap of high-vacuum baffle valve, open 200 liters/second
Vavuum pump, makes test section vacuum to 40~50Kpa, opens 300 liter/second vavuum pumps, and to be tested section of vacuum reaches 20~
30Kpa, opens 600 liter/second vavuum pumps, makes test section static pressure stabilization in 20Kpa；
(5.2) when running high vacuum pattern, repeat step (5.1), to be tested section of static pressure stabilization is closed low in 20Kpa
Vacuum flapper valve, opens cap of high-vacuum baffle valve, opens 1800 liter/second vavuum pumps, and to be tested section of vacuum reaches below 0.8Kpa
And when stablizing constant, 5000 liter/second vavuum pumps are opened, vacuum pump group is evacuated to equipment end vacuum.
Equipment end vacuum pressure is less than or equal to 100Pa in the step (5.2).
Present invention advantage compared with prior art is as follows：
(1) present invention is designed by binary channel, realizes low-vacuum-operating and high vacuum operation both of which, meets high frequency sense
Answer the static pressure requirement under wind-tunnel various requirement.Conventional vacuum pump group only has single flow pattern, does not possess the mutual of both of which
Mutually switch, it is impossible to meet the test requirements document of high-frequency induction wind-tunnel.
(2) present invention meets the normal work under High-frequency Interference environment by carrying out anti-electromagnetic interference design to vavuum pump
Make, control core position and carry out special anti-electromagnetic shielding material compared with near-end position apart from high-frequency induction equipment and wrap up.Compared to general
Logical vacuum pump group, will cause control module to fail or damage under unprotect state by electromagnetic interference, unit is normally transported
OK.
(3) vacuum pump group used is surveyed static pressure and can reach below 100Pa by high vacuum pattern in the present invention, meets high frequency
Sense the test requirements document of wind-tunnel, this kind of vacuum pressure regulation control design case is directed to condition of high vacuum degree demand, especially in the anti-heat examination in ground
There is critically important practical value in the field of testing.
Brief description of the drawings
Fig. 1 is design diagram of the invention.
Specific embodiment
As shown in figure 1, high-frequency induction wind-tunnel vacuum pressure regulating system of the present invention includes 200 liter/second vavuum pumps 1,300
Liter/second vavuum pump 2,600 liter/second vavuum pumps 3,1800 liter/second vavuum pumps 4,5000 liter/second vavuum pumps 5, low vacuum flapper valve 6,
Cap of high-vacuum baffle valve 7, vacuum meter 8, aeration valve 9, first pressure sensor 10, second pressure sensor 11 and electric check valve
12。
High-frequency induction wind-tunnel is connected by pipeline and the one end of vacuum meter 8, the other end of vacuum meter 8 simultaneously with aeration valve 9 one
End and the import of cap of high-vacuum baffle valve 7 connection, the outlet of cap of high-vacuum baffle valve 7 are sequentially connected 5000 liter/second vavuum pumps 5 by pipeline
Be connected with the one outlet of low vacuum flapper valve 6 with liter/second vavuum pump 4 of 1800 liter/second vavuum pump 4,1800, aeration valve 9 it is another
One end is connected with the import of low vacuum flapper valve 6, low vacuum flapper valve 6 another outlet by pipeline be sequentially connected 600 liters/
Second vavuum pump 3,300 liter/second vavuum pumps 2 and liter/second vavuum pump 1 of 200 liter/second vavuum pump 1,200 are joined by muffler with air
It is logical；
Tank is connected by inlet pipeline with the water inlet of 300 liter/second vavuum pumps 2 and 1800 liter/second vavuum pumps 4, institute
State be disposed with inlet pipeline 11,1800 liters of first pressure sensor 10, electric check valve 12 and second pressure sensor/
The second delivery port of vavuum pump 4 is connected with the water inlet of 600 liter/second vavuum pumps 3, the delivery port and 200 of 300 liter/second vavuum pumps 2
The delivery port of the water inlet connection of liter/second vavuum pump 1, the delivery port of 600 liter/second vavuum pumps 3 and 200 liter/second vavuum pumps 1 leads to
Outlet pipeline is crossed to be connected with tank.
The electric current of each vavuum pump, voltage data collection are connected into upper computer control system, upper computer control system by PLC
Setting higher limit carries out early warning.Vavuum pump cooling water pressure is connected into upper computer control system after pressure sensor is gathered, very
Empty pump temperature is connected into upper computer control system after temperature sensor is gathered, and upper computer control system setting higher limit carries out pre-
It is alert.All equal Real-time Collections of data form document storing.
Each vavuum pump uses anti-electromagnetic interference design protection, and between vavuum pump and PLC, PLC and each sensor it
Between be designed with photoelectric isolation module, signal path uses metal-shielded wire, for example various sensors of significant points, data acquisition equipment
And control chip etc. is using special anti-electromagnetic shielding material parcel.
The present invention is further provided with frequency conversion parameter control module, and the frequency conversion for each vavuum pump to be set or changed is joined
Number, to ensure that high accurancy and precision is adjusted.
Low-vacuum mode operating index of the present invention is 20~100kpa for experiment vacuum environment；High vacuum mode operation refers to
Mark：Experiment vacuum environment is≤20kpa.When high-frequency induction wind-tunnel needs rough vacuum (i.e. 20~100kpa), first three groups are taken out
The less vacuum pump operation of power；When high-frequency induction wind-tunnel needs condition of high vacuum degree (i.e.≤20kpa), five groups of same lucks of vavuum pump
OK, maximum draft is realized, wind tunnel operation needs are met.Specifically, vacuum pressure adjusting method of the invention is as follows：
When Low-vacuum mode is run, low vacuum flapper valve 6 is opened, close cap of high-vacuum baffle valve 7, open 200 liters/second true
Empty pump 1, makes test section vacuum interval to 40~50Kpa, opens 300 liter/second vavuum pumps 2, and to be tested section of vacuum reaches 20
~30Kpa is interval, opens 600 liter/second vavuum pumps 3, and test section static pressure stabilization meets Low-vacuum mode condition in 20Kpa.
When high vacuum pattern is run, Low-vacuum mode operation is repeated, to be tested section of static pressure stabilization is closed in 20Kpa
Low vacuum flapper valve 6, opens cap of high-vacuum baffle valve 7, opens 1800 liter/second vavuum pumps 4, and to be tested section of vacuum reaches 0.8Kpa
Below and stablize constant, open 5000 liter/second vavuum pumps 5.In the case where frequency conversion parameter is not changed, vacuum pump group will be evacuated to
Equipment end vacuum (actual measurement is≤100Pa).
In order to further improve the automaticity of system, vacuum pressure regulating system of the invention runs mould in high vacuum
Except manual Starting mode, also high vacuum automatic control mode step by step above-mentioned during formula.In the high vacuum side of automatically controlling
In formula, 200 liter/second vavuum pumps, 300 liter/second vavuum pumps, 600 liter/second vavuum pumps, 1800 liter/second vavuum pumps, 5000 liters/second are true
Each group of pump of empty pump can carry out start stop operation by clicking directly on corresponding icon.Also can by clicking on high vacuum start button,
In the case of self-starting is completed, next group of vacuum pump group of automatic is sequentially completed five groups of whole startups of pump to every group of pump.Every group
The start and stop of pump connect control panel by PLC, are controlled by host computer operation interface, while testing ground is provided with manipulates the direct of cabinet
Mechanical course.High vacuum automatic control mode, high vacuum need to be only clicked under stopped status and automatically controls 8, and system will be automatic complete
Into high vacuum mode startup operation, the vacuum that reaches capacity and steady pressure.Under high vacuum pattern, change frequency conversion parameter, can
So that vacuum pump set keeps vacuum pressure value in below 5Kpa scopes arbitrary parameter.
The present invention is designed using the binary channel of high vacuum pattern and Low-vacuum mode, 600 liter/second vavuum pumps, 1800 liters/
Tributary circuit is set between second vavuum pump, is isolated by flapper valve, flapper valve, high vacuum state ShiShimonoseki are opened under Low-vacuum mode
Close flapper valve；Opened under closing flapper valve, high vacuum state under flapper valve, Low-vacuum mode are set after 5000 liter/second vavuum pumps
Open flapper valve.Two paths connect high-frequency induction wind tunnel body simultaneously.In the less three groups of vacuum pump operations of aspiration, realize
The stable operation of low vacuum；By two groups of operations of flapper valve, change gas channels, realize that five groups of vavuum pumps run simultaneously, reach
It is maximum to aspiration vacuum amount, realize wind-tunnel high vacuum state.Under high vacuum pattern, by adjusting 5000 liter/second vavuum pumps
Frequency converter, realizes the accurate adjustment of condition of high vacuum degree.Modernization design is added again simultaneously, Automated condtrol and manually control is realized
Free switching.By the monitoring to signals such as every group of vacuum pump voltage, electric current, cooling water temperatures, running status is accomplished
Monitor in real time, also for test run provides necessary operational support.High-frequency induction technology has strong electromagnetic feature, can be right
Surrounding metal and conductor produce heating and strong type number interference, this invention to be directed to this feature, electromagnetism is employed in control design case
The protection of shielding, has been effectively isolated electromagnetic interference of the high-frequency induction wind tunnel test to vacuum equipment.
The present invention can realize high-frequency induction heating wind-tunnel needed for vacuum test environment, it is ensured that its smooth ignition and it is long when
Between test stable operation.Needed accurately to adjust vacuum environment in the body of hole according to experiment simultaneously, and in running
Every vacuum parameters be monitored and early warning.The characteristics of for high-frequency induction wind-tunnel strong electromagnetic, prevented in design
The shielding quarantine measures of electromagnetic interference, solve the interference and distortion of signal.The present invention passes through verification experimental verification, can meet high frequency
The vacuum pressure requirement of sensing wind-tunnel, has important use in space flight aerothermodynamics experiment field.
Unspecified part of the present invention belongs to general knowledge as well known to those skilled in the art.
Claims (6)
1. high-frequency induction wind-tunnel vacuum pressure regulating system, it is characterised in that：Including 200 liter/second vavuum pumps (1), 300 liters/second
Vavuum pump (2), 600 liter/second vavuum pumps (3), 1800 liter/second vavuum pumps (4), 5000 liter/second vavuum pumps (5), low vacuum baffle plate
Valve (6), cap of high-vacuum baffle valve (7), vacuum meter (8), aeration valve (9), first pressure sensor (10), second pressure sensor
And electric check valve (12) (11)；
High-frequency induction wind-tunnel is connected by pipeline and vacuum meter (8) one end, vacuum meter (8) other end simultaneously with aeration valve (9)
One end and cap of high-vacuum baffle valve (7) import are connected, and the outlet of cap of high-vacuum baffle valve (7) is sequentially connected 5000 liters/second by pipeline
Vavuum pump (5) and 1800 liter/second vavuum pumps (4), 1800 liter/second vavuum pumps (4) connect with the one outlet of low vacuum flapper valve (6)
Connect, the other end of aeration valve (9) is connected with the import of low vacuum flapper valve (6), another outlet of low vacuum flapper valve (6) is logical
Cross pipeline and be sequentially connected 600 liter/second vavuum pumps (3), 300 liter/second vavuum pumps (2) and 200 liter/second vavuum pumps (1), 200 liters/second
Vavuum pump (1) is connected by muffler with air；
Tank is connected by inlet pipeline with the water inlet of 300 liter/second vavuum pumps (2) and 1800 liter/second vavuum pumps (4), institute
State and be disposed with inlet pipeline first pressure sensor (10), electric check valve (12) and second pressure sensor (11),
The delivery port of 1800 liter/second vavuum pumps (4) is connected with the water inlet of 600 liter/second vavuum pumps (3), 300 liter/second vavuum pumps (2)
Delivery port is connected with the water inlet of 200 liter/second vavuum pumps (1), and the delivery port and 200 liters/second of 600 liter/second vavuum pumps (3) are true
The delivery port of empty pump (1) is connected by outlet pipeline with tank.
2. high-frequency induction wind-tunnel vacuum pressure regulating system according to claim 1, it is characterised in that：Also include host computer
Control system, PLC, temperature sensor and pressure sensor, PLC gather the electric current of each vavuum pump, voltage data, and transmit
To upper computer control system, temperature sensor gathers the temperature of each vavuum pump and is transferred to upper computer control system, pressure
Sensor gathers the cooling water pressure of each vavuum pump, electric current, voltage, temperature or cold of the upper computer control system in vavuum pump
But alarmed when water pressure exceedes default threshold value.
3. high-frequency induction wind-tunnel vacuum pressure regulating system according to claim 2, it is characterised in that：The vacuum pressure
Regulating system is designed with the shielding quarantine measures of anti-electromagnetic interference, and between vavuum pump and PLC, PLC and temperature sensor it
Between, photoelectric isolation module is designed between PLC and pressure sensor.
4. high-frequency induction wind-tunnel vacuum pressure regulating system according to claim 1, it is characterised in that：Also join including frequency conversion
Number control module, the frequency conversion parameter for each vavuum pump to be set or changed.
5. pressure controlled method is carried out using vacuum pressure regulating system described in claim 1, it is characterised in that including following
Step：
(5.1) when running Low-vacuum mode, opening low vacuum flapper valve (6), closing cap of high-vacuum baffle valve (7), 200 liters of unlatching/
Second vavuum pump (1), make test section vacuum to 40~50Kpa, open 300 liter/second vavuum pumps (2), to be tested section of vacuum reaches
To 20~30Kpa, 600 liter/second vavuum pumps (3) are opened, make test section static pressure stabilization in 20Kpa；
(5.2) when running high vacuum pattern, repeat step (5.1), to be tested section of static pressure stabilization closes low vacuum in 20Kpa
Flapper valve (6), opens cap of high-vacuum baffle valve (7), opens 1800 liter/second vavuum pumps (4), and to be tested section of vacuum reaches 0.8Kpa
Below and when stablizing constant, 5000 liter/second vavuum pumps (5) are opened, vacuum pump group is evacuated to equipment end vacuum.
6. method according to claim 5, it is characterised in that：Equipment end vacuum pressure is less than in the step (5.2)
Equal to 100Pa.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710104210.9A CN106768811B (en) | 2017-02-24 | 2017-02-24 | High-frequency induction wind tunnel vacuum pressure regulating system and pressure regulating method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710104210.9A CN106768811B (en) | 2017-02-24 | 2017-02-24 | High-frequency induction wind tunnel vacuum pressure regulating system and pressure regulating method |
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| CN106768811A true CN106768811A (en) | 2017-05-31 |
| CN106768811B CN106768811B (en) | 2023-11-10 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110362123A (en) * | 2019-07-08 | 2019-10-22 | 华中科技大学 | A kind of hypersonic intermittent wind tunnel start-stop control system and method |
| CN111679703A (en) * | 2020-07-07 | 2020-09-18 | 中国空气动力研究与发展中心超高速空气动力研究所 | Temperature protection control system of centrifugal vacuum pump and control method thereof |
| CN114509231A (en) * | 2021-12-30 | 2022-05-17 | 北京航天益森风洞工程技术有限公司 | Wind tunnel operating system and wind tunnel operating method based on same |
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| JPH0719993A (en) * | 1991-12-31 | 1995-01-20 | Kawasaki Heavy Ind Ltd | Operation control device for blowout type wind tunnel |
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2017
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110362123A (en) * | 2019-07-08 | 2019-10-22 | 华中科技大学 | A kind of hypersonic intermittent wind tunnel start-stop control system and method |
| CN111679703A (en) * | 2020-07-07 | 2020-09-18 | 中国空气动力研究与发展中心超高速空气动力研究所 | Temperature protection control system of centrifugal vacuum pump and control method thereof |
| CN114509231A (en) * | 2021-12-30 | 2022-05-17 | 北京航天益森风洞工程技术有限公司 | Wind tunnel operating system and wind tunnel operating method based on same |
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| Publication number | Publication date |
|---|---|
| CN106768811B (en) | 2023-11-10 |
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