CN102023654B - Large environment simulation laboratory pressure control system and control method thereof - Google Patents
Large environment simulation laboratory pressure control system and control method thereof Download PDFInfo
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- CN102023654B CN102023654B CN2010106035701A CN201010603570A CN102023654B CN 102023654 B CN102023654 B CN 102023654B CN 2010106035701 A CN2010106035701 A CN 2010106035701A CN 201010603570 A CN201010603570 A CN 201010603570A CN 102023654 B CN102023654 B CN 102023654B
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Abstract
The invention discloses a large environment simulation laboratory pressure control system and a control method thereof. The system comprises a main vacuum pump, an appendage vacuum pump, an automatic valve, check valves, an extraction pipe, an exhaust pipe, an automatic gulp valve, a hand gulp valve, a vacuum meter, an automatic air release valve, a filter, a hand air release valve, a PLC device and a large environment simulation laboratory, wherein the components are connected through pipes to realize the circulation of gas. The main vacuum pump is matched with the appendage vacuum pump for use and air in the large environment laboratory is pumped, thus the aim of fast depressurization can be realized; each pipe is provided with a plurality of automatic valves and check valves to control air flow and air velocity and prevent back flow; and the system uses the PLC to set various logical relations and interlock protection, has simple operation and can realize automatic control.
Description
Technical field
The present invention relates to a kind of pressure control field, specifically, is a kind of control system and control method thereof that is applied to the step-down of environmental simulation test chamber, negative pressure, is specially adapted to super-huge space environment simulation test chamber.
Background technology
The plateau low pressure environmental test is the environment certification test that a large amount of industrial products need carry out.For small sized product, generally be that the plateau low pressure environment that utilizes manual method to obtain is examined; For large-scale machine product, often need travel to and fro between the altitude environment of nature and examine, cause lead time length, the fund cost of product huge, also usually receive the restriction of natural conditions simultaneously, environmental parameter is difficult to satisfy the demand of test.
In order to satisfy the plateau low pressure environmental test demand of large-scale machine product, need to build oversized vacuum tank.At present, the U.S., Russia, European Space Agency, Japan all build the large space environmental unit of diameter greater than 10m, and the large space environmental simulation equipment KM6 that diameter is 12m is also had in the Chinese Academy of Space Technology.Because the large space environmental simulation device space is big; Air capacity and rate of pressure reduction to control pressurer system in the step-down process require all higher; Therefore the vacuum pump structure more complicated of prior art has increased difficulty also for simultaneously the robot brain of system and design logic relation.
Summary of the invention
The present invention is in order to address the above problem, and the present invention proposes a kind of control system and control method thereof that is applied to large space environmental simulation test chamber step-down, negative pressure, makes the indoor test of carrying out quick step-down of large space environmental simulation test.
A kind of large space environmental simulation test of the present invention chamber pressure control system comprises main vacuum pumping pump, holding vacuum pump, non-return valve A, non-return valve B; Main vacuum pumping pump automatic valve, holding vacuum pump automatic valve, autovalve, pump-line, gas exhaust duct; Automatic air compensating valve, manual air compensating valve, vacuum meter A, vacuum meter B; Automatic blow off valve valve air relief, filtrator, manually air release, PLC opertaing device and large space environmental simulation test chamber.
Wherein, be connected with manual air release, automatic blow off valve valve air relief and vacuum meter A through pipeline on the large space environmental simulation test chamber, automatic blow off valve valve air relief is connected with filtrator; The large space environmental simulation test also is connected with vacuum meter B, autovalve, manual air compensating valve and automatic air compensating valve in turn through pump-line on the chamber; Be parallel with main vacuum pumping pump and holding vacuum pump through pipeline respectively on the pump-line between autovalve and the manual air compensating valve; Main vacuum pumping pump links to each other with gas exhaust duct through pipeline with holding vacuum pump; Be disposed with non-return valve A and main vacuum pumping pump automatic valve on the pipeline between each main vacuum pumping pump and pump-line; Be disposed with non-return valve A and holding vacuum pump automatic valve on the pipeline between holding vacuum pump and pump-line; The PLC opertaing device links to each other with non-return valve A, non-return valve B, automatic air compensating valve, automatic blow off valve valve air relief, main vacuum pumping pump, holding vacuum pump, vacuum meter A, vacuum meter B, main vacuum pumping pump automatic valve, holding vacuum pump automatic valve, autovalve through data line.
Air in the large space environmental simulation test chamber is after main vacuum pumping pump suction, and is outdoor by the environmental simulation test of gas exhaust duct discharge large space, realizes the indoor quick step-down of large space environmental simulation test; Prevent gas backstreaming through non-return valve A and non-return valve B; Airshed in the pump-line realizes the cut-out or the connection of pump-line through main vacuum pumping pump automatic valve control; The switch and the flow size of main vacuum pumping pump place gas circuit are controlled by the holding vacuum pump automatic valve; Main vacuum pumping pump bleed finish shut down after, through the mobile equilibrium that holding vacuum pump keeps air compensation and rate of air sucked in required, keep stablizing of indoor hypobaric of large space environmental simulation test and vacuum tightness value; The switch and the flow size of holding vacuum pump place gas circuit are controlled by autovalve; Air compensation in the large space environmental simulation test chamber is through automatic air compensating valve control; The impurity that gets in the large space environmental simulation test room air is removed through filtrator; Accomplishing the back in test, through automatic blow off valve valve air relief outside air to be aspirated the large space environmental simulation test after filtrator filters indoor, makes large space environmental simulation test indoor and outdoor force value reach balance; Manually carry out multiple pressure through manual air compensating valve to the large space environmental simulation test is indoor; Vacuum meter A is used for measuring the atmospheric pressure value in the pump-line, and to PLC opertaing device input feedback signal; Vacuum meter B is used for measuring the indoor atmospheric pressure value of large space environmental simulation test, and to PLC opertaing device input feedback signal.Wherein, the PLC opertaing device is used for controlling the unlatching of main vacuum pumping pump, holding vacuum pump, non-return valve A, non-return valve B, main vacuum pumping pump automatic valve, holding vacuum pump automatic valve, autovalve, automatic air compensating valve, vacuum meter A, vacuum meter B and automatic blow off valve valve air relief or cutting out.
The compress control method of a kind of large space environmental simulation test of the present invention chamber pressure control system, realize through following step:
Step 1: PLC opertaing device initialization;
After opening PLC opertaing device power supply, through setting the vacuum tightness of this experimental simulation on the outer PC.
Whether step 2: it is normal to detect vacuum meter A and vacuum meter B;
Vacuum meter A and vacuum meter B can send digital signal to PLC equipment, if do not receive the digital signal of this vacuum meter A or vacuum meter B, PLC equipment alarm; Otherwise directly carry out step 3.
Whether step 3: it is normal to detect the indoor vacuum tightness of large space environmental simulation test;
The value of the vacuum tightness that the large space environmental test that records through vacuum meter A is indoor sends to the PLC opertaing device, and is identical if the value of the indoor vacuum tightness of large space environmental simulation test and normal atmosphere (An) are worth, and shows that then the indoor vacuum tightness of large space environmental simulation test is normal; Otherwise the PLC opertaing device is reported to the police.Carry out multiple pressure through manual air compensating valve to the large space environmental simulation test is indoor this moment, and the value of the vacuum tightness that records up to vacuum meter A is identical with the normal atmosphere (An) value.
Step 4: begin to large space environmental simulation test chamber interior pumped down;
Open main vacuum pumping pump automatic valve, holding vacuum pump automatic valve, autovalve through the PLC opertaing device, and open main vacuum pumping pump and holding vacuum pump simultaneously, and pass through the aperture of PLC opertaing device by-pass valve control, thus the control rate of air sucked in required.
Step 5: when the indoor vacuum tightness of large space environmental simulation test reaches the value of setting in the step 1; The PLC opertaing device aperture of closing main vacuum pumping pump and regulating holding vacuum pump automatic valve and automatic air compensating valve then; Make air compensation and holding vacuum pump rate of air sucked in required keep balance, until off-test.
Step 6: multiple pressure is carried out in large space environmental simulation test chamber;
After experiment finished, PLC opened automatic blow off valve valve air relief, and outside air filters and automatic blow off valve valve air relief through filtrator, and it is indoor that quilt is aspirated the environmental simulation test of entering large space, reaches balance up to large space environmental chamber external and internal pressure value, closes automatic blow off valve valve air relief; If control pressurer system automatic blow off valve valve air relief of the present invention breaks down, then, multiple pressure is carried out in inside, large space environmental simulation laboratory through opening manual air release.
The invention has the advantages that:
1, control pressurer system flexible design of the present invention; Can adopt the mode of the several main vacuum pumping pumps of multi-parallel to strengthen rate of air sucked in required; Therefore spendable testing laboratory scope is wider; The restriction of the chamber size size of not being put to the test can be adopted control pressurer system of the present invention like the testing laboratory of diameter 10m, and the testing laboratory of diameter 15m also can adopt control pressurer system of the present invention;
2, control pressurer system of the present invention adopts the collocation of main vacuum pumping pump and holding pump to use, and not only can control rate of air sucked in required, the speed of exhaust, can also reach the accurate effect of controlling vacuum tightness in the testing laboratory; And after testing laboratory's air pressure reaches requirement, only open holding vacuum pump and keep room pressure, effectively energy savings;
3, control pressurer system of the present invention through high pressure bleed, the intermittence pressure control of low pressure tonifying Qi; Main vacuum pumping pump, holding vacuum pump and each valve and vacuum meter are provided with various logic relation and interlock protection through the PLC opertaing device easily; Easy and simple to handle, can reduce fault and maloperation damage to equipment, the PLC opertaing device is reliable when unmanned.
4, control pressurer system of the present invention is simple in structure, can satisfy the requirement of large space environmental simulation test chamber, especially big space to the rate of air sucked in required and the speed of exhaust through the mode of many cover vacuum pumping pumps parallel connection;
5, design and installation has automatic and manual air release and aeration valve among the present invention, can guarantee the reliability service of system.
Description of drawings
Fig. 1 is a pressure control architecture synoptic diagram of the present invention;
Fig. 2 is a compress control method process flow diagram of the present invention;
When Fig. 3 simulates 4000 meters sea level elevations (61.6kPa) for utilizing control pressurer system of the present invention, the indoor vacuum degree control curve map of large space simulation test;
When Fig. 4 simulates 6000 meters sea level elevations (47.1kPa) for utilizing control pressurer system of the present invention, the indoor vacuum degree control curve map of large space simulation test.
Among the figure:
1-master's vacuum pumping pump 2-holding vacuum pump 3-non-return valve A 4-non-return valve B
5-master's vacuum pumping pump automatic valve 6-holding vacuum pump automatic valve 7-autovalve 8-pump-line
9-gas exhaust duct 10-automatic air compensating valve 11-manually mends 12-vacuum meter A
Air valve
The manual air release of 13-vacuum meter B 14-automatic blow off valve valve air relief 15-filtrator 16-
17-large space environmental simulation test 18-PLC opertaing device
The chamber
Embodiment
To combine accompanying drawing and embodiment that the present invention is done further explain below.
Large space environmental simulation test chamber pressure control system of the present invention; Comprise main vacuum pumping pump 1, holding vacuum pump 2, non-return valve A3, non-return valve B4, main vacuum pumping pump automatic valve 5, holding vacuum pump automatic valve 6, autovalve 7, pump-line 8, gas exhaust duct 9, automatic air compensating valve 10, manual air compensating valve 11, vacuum meter A12, vacuum meter B13, automatic blow off valve valve air relief 14, filtrator 15, manually air release 16, PLC opertaing device 18 and large space environmental simulation test chamber 17, as shown in Figure 1.
Be connected with manual air release 16, automatic blow off valve valve air relief 14 and vacuum meter A12 through pipeline on the large space environmental simulation test chamber 17, automatic blow off valve valve air relief 14 is connected with filtrator 15.Also be connected with vacuum meter B13, autovalve 7, manual air compensating valve 11 and automatic air compensating valve 10 in turn on the large space environmental simulation test chamber 17 through pump-line 8.Be parallel with main vacuum pumping pump 1 and holding vacuum pump 2 through pipeline respectively on the pump-line 8 between autovalve 7 and the manual air compensating valve 11.Main vacuum pumping pump 1 links to each other with gas exhaust duct 9 through pipeline with holding vacuum pump 2.Be disposed with non-return valve A3 and main vacuum pumping pump automatic valve 5 on the pipeline that each main vacuum pumping pump 1 and pump-line are 8.Be disposed with non-return valve A3 and holding vacuum pump automatic valve 6 on the pipeline that holding vacuum pump 2 and pump-line are 8.Main vacuum pumping pump automatic valve PLC opertaing device 18 links to each other with non-return valve A3, non-return valve B4, automatic air compensating valve 10, automatic blow off valve valve air relief 14, main vacuum pumping pump 1, holding vacuum pump 2, vacuum meter A12, vacuum meter B13, main vacuum pumping pump automatic valve 5, holding vacuum pump automatic valve 6, autovalve 7 through data line.
Wherein, main vacuum pumping pump 1 adopts high-revolving vacuum pump, is used in the test preparatory stage, to bleeding in the large space environmental simulation test chamber 17, bleeding body is discharged with gas exhaust duct 9, realizes the quick step-down in the large space environmental simulation test chamber 17.Because large space environmental simulation test chamber 17 internal gas pressures are lower than ambient pressure in pumping process, therefore, prevent gas backstreaming through non-return valve A3 or non-return valve B4 thus if main vacuum pumping pump 1 or holding vacuum pump 2 are shut down or gas backstreaming when breaking down.Autovalve 7 is used for controlling the airshed in the exhaust pipe 8, can realize the cut-out or the connection of exhaust pipe 8.Main vacuum pumping pump automatic valve 5 is used for controlling the switch and the flow size of main vacuum pumping pump 1 place gas circuit.
Main vacuum pumping pump 1 bleed finish shut down after, through the mobile equilibrium that holding vacuum pump 2 keeps air compensations and rate of air sucked in required, keep stablizing of hypobaric and vacuum tightness value in the large space environmental simulation test chamber 17; Holding vacuum pump automatic valve 6 is used for controlling the switch and the flow size of holding vacuum pump 2 place gas circuits.
Because control pressurer system of the present invention adopts high-pressure air feed, low pressure tonifying Qi to realize the pressure control in the large space environmental simulation test chamber 17, therefore need control air compensation through automatic air compensating valve 10.
Filtrator 15 is used for eliminating the impurity that gets in the large space environmental simulation test room air, with the normal use of protection valve and large space environmental simulation test indoor equipment.
After test is accomplished, need carry out multiple pressure to large space environmental simulation test chamber 17, therefore the air of outside air after filtrator 15 filters aspirated in the large space environmental simulation test chamber 17 through automatic blow off valve valve air relief 14, make the indoor and outdoor force value reach balance.When automatic blow off valve valve air relief 14 breaks down, manually carry out multiple pressure to the large space environmental simulation test is indoor through manual air compensating valve 11;
Vacuum meter B13 is used for measuring the atmospheric pressure value in the pump-line 8, and to PLC opertaing device input feedback signal; Vacuum meter A12 is used for measuring the atmospheric pressure value in the large space environmental simulation test chamber 17, and to PLC opertaing device input feedback signal.
Said PLC opertaing device 18 is used as controller control pressurer system of the present invention is controlled, and controllable variable is that parameter is more, and makes system's operation safer through editor's interlocked relationship.PLC accepts the input signal of vacuum meter A12 and vacuum meter B13; In PLC equipment, import the control corresponding instruction through exterior PC; Thereby control the unlatching of main vacuum pumping pump automatic valve 5, holding vacuum pump automatic valve 6, autovalve 7, automatic air compensating valve 10, automatic blow off valve valve air relief 14, non-return valve A, non-return valve B or close, and the start and stop of controlling main vacuum pumping pump 1 and holding vacuum pump 2.
The present invention is based on the compress control method of above-mentioned large space testing laboratory environmental pressure control system, as shown in Figure 2, accomplish through following step:
Step 1: PLC opertaing device initialization;
After opening PLC opertaing device power supply, through setting the vacuum tightness of this experimental simulation on the outer PC.
Whether step 2: it is normal to detect vacuum meter A12 and vacuum meter B13;
Vacuum meter A12 and vacuum meter B13 send digital signal to PLC opertaing device 18; If do not receive the digital signal of vacuum meter A12 or vacuum meter B13; PLC opertaing device 18 is reported to the police; Need this moment the staff that vacuum meter A12 or vacuum meter B13 fault are detected, get rid of the fault of vacuum meter A12 or vacuum meter B13, get into step 3 subsequently; Otherwise directly carry out step 3.
Whether step 3: it is normal to detect large space environmental simulation test chamber 17 interior vacuum tightnesss;
The value of the vacuum tightness in the large space environmental test chamber 17 that records through vacuum meter A12 sends to PLC opertaing device 18, if the value of vacuum tightness is identical with the normal atmosphere (An) value, shows that then large space environmental simulation test chamber 17 interior vacuum tightnesss are normal; Otherwise PLC opertaing device 18 is reported to the police.This moment, the value of vacuum tightness was identical with the normal atmosphere (An) value in the large space environmental simulation test chamber 17 that vacuum meter A12 records through carrying out multiple pressure in 16 pairs of large space environmental simulation tests of manual air compensating valve chamber 17.
Step 4: begin to large space environmental simulation test chamber 17 inner pumped down;
Open main vacuum pumping pump automatic valve 5, holding vacuum pump automatic valve 6, autovalve 7 through PLC opertaing device 18; And open main vacuum pumping pump 1 and holding vacuum pump 2 simultaneously; And through the aperture of the main vacuum pumping pump automatic valve 5 of PLC opertaing device 18 controls, thereby control rate of air sucked in required.
Step 5: vacuum tightness reaches the value of setting in the step 1 in large space environmental simulation test chamber 17; Then close main vacuum pumping pump 1 and regulate holding vacuum pump automatic valve 6 and the aperture of automatic air compensating valve 10 through PLC opertaing device 18; Make air compensation and holding vacuum pump 2 rates of air sucked in required keep balance, until off-test.
Step 6: after the off-test, multiple pressure is carried out in 17 inside, large space environmental simulation test chamber;
Open automatic blow off valve valve air relief 14; Owing to have pressure differential inside and outside the large space environmental simulation test chamber 17; Outside air is crossed 15 filter and automatics blow off valve valve air relief 14 through filtrator; Got in the large space environmental simulation test chamber 17 by suction, reach balance, close automatic blow off valve valve air relief 14 up to the indoor 17 external pressure values of large space environmental simulation test.If automatic blow off valve valve air relief 14 breaks down in the control pressurer system, can come multiple pressure is carried out in 17 inside, large space environmental simulation test chamber through opening manual air release 16.
Embodiment 1: large space environmental simulation test chamber pressure control system and control method thereof are that 22m, height are for carrying out the simulation of 4000 meters sea level elevations (61.6kPa) in the large space environmental simulation test chamber 17 of 34m at internal diameter respectively according to the present invention.Adopt 4 main scavenging pumps in the control pressurer system of the present invention; Reach setup pressure value in the testing laboratory behind the operation 800s; Actual measured value is 61.5～61.7kPa; The control accuracy error amount≤± 0.1kPa, control accuracy＜± 0.5%, promptly error amount is divided by exact value ± 0.1kPa ÷ 61.6kPa＜± 0.5%, and is as shown in Figure 3.
Embodiment 2: large space environmental simulation test chamber pressure control system and control method thereof are that 22m, height are for carrying out the simulation of 6000 meters sea level elevations (47.1kPa) in the large space environmental simulation test chamber 17 of 34m at internal diameter respectively according to the present invention.In control pressurer system of the present invention, adopt 3 main vacuum pumping pumps, reach setup pressure value in the testing laboratory behind the operation 2000s, actual measured value is 46.9～47.2kPa, the control accuracy error amount≤± 0.2kPa, control accuracy＜± 0.5%, as shown in Figure 4.
Claims (6)
1. the compress control method of a large space environmental simulation test chamber pressure control system is characterized in that: be a kind of compress control method to the large space environmental simulation test chamber pressure control system that comprises large space environmental simulation test chamber, main vacuum pumping pump, holding vacuum pump, non-return valve A, non-return valve B, main vacuum pumping pump automatic valve, holding vacuum pump automatic valve, autovalve, pump-line, gas exhaust duct, automatic air compensating valve, manual air compensating valve, vacuum meter A, vacuum meter B, automatic blow off valve valve air relief, filtrator, manual air release, PLC opertaing device;
Wherein, be connected with manual air release, automatic blow off valve valve air relief and vacuum meter A through pipeline on the large space environmental simulation test chamber, automatic blow off valve valve air relief is connected with filtrator; The large space environmental simulation test also is connected with vacuum meter B, autovalve, manual air compensating valve and automatic air compensating valve in turn through pump-line on the chamber; Be parallel with main vacuum pumping pump and holding vacuum pump through pipeline respectively on the pump-line between autovalve and the manual air compensating valve; Main vacuum pumping pump links to each other with gas exhaust duct through pipeline with holding vacuum pump; Be disposed with non-return valve A and main vacuum pumping pump automatic valve on the pipeline between each main vacuum pumping pump and pump-line; Be disposed with non-return valve B and holding vacuum pump automatic valve on the pipeline between holding vacuum pump and pump-line; The PLC opertaing device links to each other with non-return valve A, non-return valve B, automatic air compensating valve, automatic blow off valve valve air relief, main vacuum pumping pump, holding vacuum pump, vacuum meter A, vacuum meter B, main vacuum pumping pump automatic valve, holding vacuum pump automatic valve, autovalve through data line;
Air in the said large space environmental simulation test chamber is after main vacuum pumping pump suction, and is outdoor by the environmental simulation test of gas exhaust duct discharge large space, realizes the indoor quick step-down of large space environmental simulation test; Prevent gas backstreaming through non-return valve A and non-return valve B; Airshed in the pump-line realizes the cut-out or the connection of pump-line through main vacuum pumping pump automatic valve control; The switch and the flow size of main vacuum pumping pump place gas circuit are controlled by the holding vacuum pump automatic valve; Main vacuum pumping pump bleed finish shut down after, through the mobile equilibrium that holding vacuum pump keeps air compensation and rate of air sucked in required, keep stablizing of indoor hypobaric of large space environmental simulation test and vacuum tightness value; The switch and the flow size of holding vacuum pump place gas circuit are controlled by autovalve; Air compensation in the large space environmental simulation test chamber is through automatic air compensating valve control; The impurity that gets in the large space environmental simulation test room air is removed through filtrator; Accomplishing the back in test, through automatic blow off valve valve air relief outside air to be aspirated the large space environmental simulation test after filtrator filters indoor, makes large space environmental simulation test indoor and outdoor force value reach balance; Manually multiple pressure is carried out in large space environmental simulation test chamber through manual air compensating valve; Vacuum meter B is used for measuring the atmospheric pressure value in the pump-line, and to PLC opertaing device input feedback signal; Vacuum meter A is used for the atmospheric pressure value of experiment with measuring chamber, and to PLC opertaing device input feedback signal; The PLC opertaing device is used for controlling the unlatching of main vacuum pumping pump, holding vacuum pump, non-return valve A, non-return valve B, main vacuum pumping pump automatic valve, holding vacuum pump automatic valve, autovalve, pump-line, gas exhaust duct, automatic air compensating valve, vacuum meter A, vacuum meter B and automatic blow off valve valve air relief or cutting out;
Specifically accomplish: step 1: the initialization of PLC opertaing device through following steps;
After opening PLC opertaing device power supply, through setting the vacuum tightness of this experimental simulation on the outer PC;
Whether step 2: it is normal to detect vacuum meter A and vacuum meter B;
Vacuum meter A and vacuum meter B send digital signal to PLC equipment, if do not receive the digital signal of vacuum meter A or vacuum meter B, PLC equipment alarm; Otherwise directly carry out step 3;
Whether step 3: it is normal to detect the indoor vacuum tightness of large space environmental simulation test;
The value of the vacuum tightness that the large space environmental simulation test that records through vacuum meter A is indoor sends to the PLC opertaing device; If the value of the indoor vacuum tightness of large space environmental simulation test is identical with the normal atmosphere (An) value, show that then the indoor vacuum tightness of large space environmental simulation test is normal; Otherwise the PLC opertaing device is reported to the police; Carry out multiple pressure through manual air compensating valve to the large space environmental simulation test is indoor this moment, and the value of the vacuum tightness that records up to vacuum meter A is identical with the normal atmosphere (An) value;
Step 4: begin to large space environmental simulation test chamber interior pumped down;
Open main vacuum pumping pump automatic valve, holding vacuum pump automatic valve, autovalve through the PLC opertaing device, and open main vacuum pumping pump and holding vacuum pump simultaneously, and pass through the aperture of PLC opertaing device by-pass valve control, thus the control rate of air sucked in required;
Step 5: when the indoor vacuum tightness of large space environmental simulation test reaches the value of setting in the step 1; The PLC opertaing device aperture of closing main vacuum pumping pump and regulating holding vacuum pump automatic valve and automatic air compensating valve then; Make air compensation and holding vacuum pump rate of air sucked in required keep balance, until off-test;
Step 6: multiple pressure is carried out in large space environmental simulation test chamber;
After experiment finished, PLC opened automatic blow off valve valve air relief, and outside air filters and automatic blow off valve valve air relief through filtrator, and it is indoor that quilt is aspirated the environmental simulation test of entering large space, reaches balance up to large space environmental simulation test indoor and outdoor force value, closes automatic blow off valve valve air relief; If automatic blow off valve valve air relief breaks down, then, multiple pressure is carried out in inside, large space environmental simulation laboratory through opening manual air release.
2. a kind of according to claim 1 compress control method of large space environmental simulation test chamber pressure control system is characterized in that: said main vacuum pumping pump is at least one.
3. a kind of according to claim 1 compress control method of large space environmental simulation test chamber pressure control system is characterized in that: said main vacuum pumping pump adopts high-revolving vacuum pump.
4. a kind of according to claim 1 compress control method of large space environmental simulation test chamber pressure control system, it is characterized in that: said holding vacuum pump adopts slow-revving vacuum pump.
5. a kind of according to claim 1 compress control method of large space environmental simulation test chamber pressure control system is characterized in that: the indoor footpath of said large space environmental simulation test is greater than 10m.
6. a kind of according to claim 1 compress control method of large space environmental simulation test chamber pressure control system is characterized in that: the indoor footpath of said large space environmental simulation test is 22m.
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| CN100590434C (en) * | 2006-12-08 | 2010-02-17 | 北京航空航天大学 | Test apparatus of large-scaled environment simulation |
| CN101722064B (en) * | 2009-12-01 | 2012-05-23 | 北京航空航天大学 | Large space and low air pressure temperature environment simulation system |
| CN101799515B (en) * | 2010-03-10 | 2012-05-23 | 北京航空航天大学 | Large multifunctional environmental simulator for electrical test |
-
2010
- 2010-12-23 CN CN2010106035701A patent/CN102023654B/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108872050A (en) * | 2018-06-28 | 2018-11-23 | 湘潭大学 | A kind of integrated environment analog machine |
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| CN102023654A (en) | 2011-04-20 |
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