CN109115531A - For accelerating the test method of heating and cooling in low pressure cabin temperature control test - Google Patents
For accelerating the test method of heating and cooling in low pressure cabin temperature control test Download PDFInfo
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- CN109115531A CN109115531A CN201810896204.6A CN201810896204A CN109115531A CN 109115531 A CN109115531 A CN 109115531A CN 201810896204 A CN201810896204 A CN 201810896204A CN 109115531 A CN109115531 A CN 109115531A
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- Prior art keywords
- cabin
- test
- low pressure
- temperature control
- temperature
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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
- G01M99/00—Subject matter not provided for in other groups of this subclass
Abstract
The invention discloses a kind of for accelerating the test method of heating and cooling in low pressure cabin temperature control test, before the test the phase, is replaced, i.e., is vacuumized to experimental cabin by voltage-controlled system to the air in experimental cabin with dry gas, then carries out multiple pressure with dry gas；Later in normal pressure by the environment temperature in the heat sink Control experiment cabin of temperature adjustment, the environmental pressure in experimental cabin is adjusted by voltage-controlled system, to reduce the time of low pressure temperature control test.The present invention can significantly reduce the time of low pressure temperature control test.
Description
Technical field
The invention belongs to spacecraft testing technical fields, specifically, the present invention relates to one kind to be directed to low-atmospheric pressure test cabin
During interior temperature control test, accelerate the test method of heating and cooling.
Background technique
Rocket engine can undergo hypobaric during the launch process, and near space vehicle is in landing and steady operation
Hypobaric can be also undergone in the process, low pressure high/low temperature operating condition need to be simulated in ground experiment.
In order to simulate low pressure high and low temperature environment, experimental cabin needs voltage-controlled system and temperature control system, for example, see Fig. 1, Fig. 1
Show low pressure temperature control testing equipment in the prior art, including experimental cabin 1, temperature adjustment is heat sink 2 and voltage-controlled system 3, voltage-controlled system
System 3 is adjusted for the pressure in Control experiment cabin 1.Voltage-controlled system 3 has tonifying Qi and vacuumizing function, by adjusting vacuum pumping speed
It is adjusted with pressure of the air compensation to experimental cabin.Temperature adjustment is heat sink 2 can to adjust temperature, changed by heat sink with ambient enviroment
Heat, the environment temperature in Control experiment cabin.
In test in order to prevent worst cold case when condensation vapor, test during first by voltage-controlled system 3 adjust test
Low pressure of the pressure in cabin to needed for testing, then carries out temperature adjusting by temperature adjustment heat sink 2.It is thermally conductive and right under low pressure operating condition
It flows heat transfer effect to weaken, the test specimen and tooling temperature rate in the inner wall and cabin of experimental cabin 1 are very slow, in 1 heating and cooling of experimental cabin
In the process, lasting cold source or heat source can be become, cooled down to environment temperature or heated, 1 environment temperature of experimental cabin is reduced
Temperature rate.
The low-atmospheric pressure test of the prior art, advanced pressure adjusting carries out temperature control again, in order to wait environment temperature to reach
To target temperature, especially environment target temperature it is very low when, since heat exchange efficiency is low under low pressure, need temperature control system longer
Time maintains worst cold case, until in the inner wall and cabin of experimental cabin 1 test specimen and tooling temperature reduce, indoor environment temperature is
Target temperature can be reached.This results in test period very long, causes the waste of the energy and human cost.The present invention proposes a kind of low
The test method for accelerating heating and cooling in pressure chamber temperature control test, can effectively shorten test period, thus energy saving and manpower
Cost.
Summary of the invention
Based on this, goal of the invention of the invention is to provide a kind of for accelerating heating and cooling in low pressure cabin temperature control test
Test method improves the temperature rate of test indoor environment temperature on the basis of existing low pressure temperature control device.
Present invention employs the following technical solutions:
For accelerating the test method of heating and cooling in low pressure cabin temperature control test, comprising the following steps:
Early period is tested in the temperature control of low pressure cabin, the air in experimental cabin is replaced with drying nitrogen or dry air,
The water content for reducing gas in cabin, i.e., vacuumize experimental cabin by voltage-controlled system, uses drying nitrogen or drying later
Air carries out multiple pressure；After the displacement for completing drying nitrogen or dry air, in normal pressure by the heat sink Control experiment cabin of temperature adjustment
Environment temperature, be at this time standard atmospheric pressure in experimental cabin, test specimen and tooling reach target temperature in the inner wall in low pressure cabin, cabin
When spending, the environmental pressure in experimental cabin is adjusted by voltage-controlled system, to reduce the time of low pressure temperature control test.
Wherein, the step of being replaced with drying nitrogen or dry air to the air in experimental cabin can carry out twice or two
More than secondary.
Wherein, before temperature control test in low pressure cabin refers to temperature control on-test early period.
Nitrogen/air displacement is dried to air in cabin by the phase before the test in the present invention, then first carries out temperature control again
Pressure adjusting is carried out, the temperature control speed in low pressure cabin can be accelerated.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of low pressure temperature control testing equipment in the prior art.
Wherein, 1 is experimental cabin；2 is heat sink for temperature adjustment；3 be voltage-controlled system.
Specific embodiment
A specific embodiment of the invention is illustrated referring to the drawings, these specific embodiments are only
Illustratively, it is no intended to which any restrictions are carried out to protection scope of the present invention.
Referring to Fig. 1, existing low pressure temperature control testing equipment includes: experimental cabin 1, temperature adjustment is heat sink 2 and voltage-controlled system 3.It is low
In air pressure temperature control test, the pressure controlled time, the most of the time, which is used in, waited environment temperature to reach operating condition quickly, was based on this,
Method of the invention is phase before the test, is replaced with drying nitrogen or air to the air in experimental cabin 1, to reduce cabin
The water content of interior gas is vacuumized experimental cabin by voltage-controlled system 3, is answered later using drying nitrogen/air
Pressure.After completing the displacement of drying nitrogen/air, in normal pressure by the heat sink 2 Control experiment indoor environment temperature of temperature adjustment, due to this
When experimental cabin 1 in be standard atmospheric pressure, significantly improved when thermally conductive at this time and heat convection efficiency is with respect to low pressure, cabin inner wall, cabin
Interior test specimen and tooling warming and cooling rate improve.When test specimen and tooling reach target temperature in cabin inner wall, cabin, pass through voltage-controlled system
Environmental pressure in 3 pairs of experimental cabins 1 is adjusted, and can significantly reduce the time of low pressure temperature control test.Wherein, in the present invention
Dry gas be not limited to nitrogen and air.
It is significantly improved when in this way, thermally conductive and heat convection efficiency is with respect to low pressure, test specimen and tooling lifting in cabin inner wall, cabin
Warm speed improves.Wherein, in primary debugging, before the method for the present invention, experimental cabin drops to -60 DEG C of needs of target temperature
6h, using test method of the present invention, 3h experimental cabin reaches target temperature, gas displacement 0.5h in middle deck, temperature control and voltage-controlled
2.5h。
Although the detailed description and description of the specific embodiments of the present invention are given above, it should be noted that
We can carry out various equivalent changes and modification to above embodiment according to the concept of the present invention, and generated function is made
It, should all be within protection scope of the present invention when with the spirit still covered without departing from specification and attached drawing.
Claims (3)
1. for accelerating the test method of heating and cooling in low pressure cabin temperature control test, comprising the following steps:
Early period is tested in the temperature control of low pressure cabin, the air in experimental cabin is replaced with drying nitrogen or dry air, is reduced
The water content of gas in cabin, i.e., vacuumize experimental cabin by voltage-controlled system, uses drying nitrogen or dry air later
Carry out multiple pressure；After the displacement for completing drying nitrogen or dry air, pass through the ring in the heat sink Control experiment cabin of temperature adjustment in normal pressure
Border temperature is at this time standard atmospheric pressure in experimental cabin, and test specimen and tooling reach target temperature in the inner wall in low pressure cabin, cabin
When, the environmental pressure in experimental cabin is adjusted by voltage-controlled system, to reduce the time of low pressure temperature control test.
2. test method as described in claim 1, wherein carried out with drying nitrogen or dry air to the air in experimental cabin
The step of displacement, can carry out twice or more than twice.
3. test method as described in claim 1, wherein before temperature control test in low pressure cabin refers to temperature control on-test early period.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810896204.6A CN109115531A (en) | 2018-08-08 | 2018-08-08 | For accelerating the test method of heating and cooling in low pressure cabin temperature control test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810896204.6A CN109115531A (en) | 2018-08-08 | 2018-08-08 | For accelerating the test method of heating and cooling in low pressure cabin temperature control test |
Publications (1)
| Publication Number | Publication Date |
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| CN109115531A true CN109115531A (en) | 2019-01-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810896204.6A Pending CN109115531A (en) | 2018-08-08 | 2018-08-08 | For accelerating the test method of heating and cooling in low pressure cabin temperature control test |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109969434A (en) * | 2019-04-03 | 2019-07-05 | 北京卫星环境工程研究所 | The heat sink component of lift for space environment simulation |
| CN114224648A (en) * | 2021-11-15 | 2022-03-25 | 青岛海尔空调器有限总公司 | Method and device for controlling cabin pressure of oxygen cabin, oxygen cabin and storage medium |
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| CN102890006A (en) * | 2012-10-24 | 2013-01-23 | 上海交通大学 | High/low temperature space environment simulating container with high temperature change rate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109969434A (en) * | 2019-04-03 | 2019-07-05 | 北京卫星环境工程研究所 | The heat sink component of lift for space environment simulation |
| CN114224648A (en) * | 2021-11-15 | 2022-03-25 | 青岛海尔空调器有限总公司 | Method and device for controlling cabin pressure of oxygen cabin, oxygen cabin and storage medium |
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Application publication date: 20190101 |