CN107449657A - A kind of negative pressure pressure alternation test method and apparatus - Google Patents
A kind of negative pressure pressure alternation test method and apparatus Download PDFInfo
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- CN107449657A CN107449657A CN201710779867.5A CN201710779867A CN107449657A CN 107449657 A CN107449657 A CN 107449657A CN 201710779867 A CN201710779867 A CN 201710779867A CN 107449657 A CN107449657 A CN 107449657A
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- pressure
- inner chamber
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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Abstract
The invention discloses a kind of negative pressure pressure alternation test method and apparatus, described device includes low-pressure gas source, stable-pressure device, environmental chamber pressure-regulating valve, air pipe line, environmental chamber, pressure sensor, pressure alternation test platform and relief valve.Environmental chamber is connected with stable-pressure device, low-pressure gas source, environmental chamber pressure-regulating valve and relief valve by air pipe line, pressure, environmental chamber pressure-regulating valve adjusting ambient lock pressure power are provided with low-pressure gas source and stable-pressure device.Pressure sensor monitoring pressure, relief valve control environment lock pressure power simultaneously keep environment lock pressure power steady in a long-term.Pressure alternation test platform carries out parameter monitoring control and data record.The present invention can realize the negative pressure pressure alternation test of product, and test parameters stability is higher, provide reliable foundation for the design identification of product, ensure that technical parameter meets main frame requirement.
Description
Technical field
The present invention relates to pressure alternation technical field, and in particular to a kind of negative pressure pressure alternation test method and apparatus.
Background technology
To oil when negative pressure pressure alternation test is always the difficult point in pressure alternation test, particularly fuel tank class product testing
Case inner fluid volume requires, therefore product cavity has air, leads to not reach condition of negative pressure, and the unstability of pressure is led
Cause the test failure of product, damage of product.By prolonged grope and put into practice, it is proposed that a kind of negative pressure pressure alternation test
Method and apparatus.
The content of the invention
The present invention is intended to provide a kind of negative pressure pressure alternation test method and apparatus, are tried with solving existing negative pressure pressure alternation
The present situation that can not be realized is tested, and ensures its stability.
The present invention is achieved by following technical solution：
A kind of negative pressure pressure alternation test method, including inner chamber fill the fuel tank of fluid, and the fuel tank is placed in into constant pressure
Power is PEnvironmentEnvironment in, heat and circulate fuel tank inner fluid, while to applying constant alternating pressure P in fuel tank inner chamberInner chamber min
~PInner chamber max~PInner chamber min, and PInner chamber min＜ PEnvironment＜ PInner chamber max, PEnvironment, PInner chamber min, PInner chamber maxRefer both to gauge pressure.
A kind of negative pressure pressure alternation test device, including pressure alternation test platform and its environmental chamber,
The environmental chamber is connected with pressure sensor, air inlet pipeline and gas exhaust piping respectively；
The air inlet pipeline includes source of the gas, stable-pressure device and the environmental chamber pressure-regulating valve being sequentially connected；
The gas exhaust piping includes relief valve.
The pressure of the source of the gas and stable-pressure device is 0.6MPa or so.
When environmental chamber pressure pressure is less than required value, the pressure value detected by pressure sensor is carried out the stable-pressure device
Automatic compensation.
For the relief valve when pressure is higher than required value, the pressure value detected by pressure sensor carries out releasing pressure automatically.
A kind of test method using above-mentioned negative pressure pressure alternation test device, comprise the following steps：
(a) fuel tank is put into the environmental chamber of pressure alternation test platform and connected, close hatch door oiling liquid into fuel tank；
(b) source of the gas is opened, is P by environmental chamber pressure-regulating valve adjusting ambient lock pressure powerEnvironment, PEnvironmentRefer to gauge pressure；(c) Opening pressure alternation
Testing stand, heating oil liquid temperature to assigned temperature and are circulated, and alternating pressure P is passed through to fuel tank by stable-pressure deviceInner chamber min~
PInner chamber max~PInner chamber min, wherein PInner chamber min＜ PEnvironment＜ PInner chamber max, alternating pressure frequency is set as r times/min, and number is t times, PEnvironment,
PInner chamber min, PInner chamber maxRefer both to gauge pressure.
Further, in the step (a), fluid accounts for the volume of fuel tank inner chamber 2/3.
Further, in the step (b), PEnvironment=50kPa, the alternating pressure P being passed through in the step (c)Inner chamber min~
PInner chamber max~PInner chamber minFor 0kPa~100kPa~0kPa, r=4 times/min of frequency, number t=5000 times.
The principle of negative pressure pressure alternation test device and method of the present invention is：Low-pressure gas source (the low pressure gas in the present invention
Source refers to bleed pressure≤0.7MPa (gauge pressure)) it is connected by air pipe line with pressure alternation test platform environmental chamber, pass through environment
Lock pressure force regulating valve adjusting ambient lock pressure power, product is uniformly extruded by air pressure all the time in environmental chamber, then passes through
Pressure alternation test platform makes product inner fluid be circulated and be heated, and alternating pressure is passed through into product by stable-pressure device, when
When being passed through the pressure of product and being returned to zero, ambient exterior atmospheric pressure makes product cavity be in the state of negative pressure, it is achieved thereby that negative pressure
Pressure alternation test.
The source of the gas is low-pressure gas source, and it is 0.6MPa or so that it reaches pressure with stable-pressure device.
The pressure alternation test platform can meet the oil liquid temperature of test requirements document, alternative frequency, alternation malleation and experiment time
Several monitoring and controllings and record.
The environmental pressure can be adjusted by relief valve and stable-pressure device.
The environmental pressure can be monitored by pressure sensor.
Select as one kind, comprised the following steps using negative pressure pressure alternation test device：
(a) product is put into the environmental chamber of pressure alternation test platform and connected, closing hatch door is noted a certain amount of into product
Fluid, account for the volume of product cavity 2/3；
(b) low-pressure gas source is opened, is 50kPa (gauge pressure) by environmental chamber pressure-regulating valve adjusting ambient lock pressure power；
(c) Opening pressure Alternating Test platform, heating oil liquid temperature are 180 DEG C and to be circulated, by stable-pressure device to production
Product are passed through 0kPa~100kPa~0kPa (gauge pressure), and frequency is 4 times/min, and number is 5000 times, pressure, frequency, temperature and secondary
Count data monitoring and be recorded as pressure alternation test platform systemic-function.
When environmental pressure is 50kPa (gauge pressure), 50kPa external pressure is uniformly provided to product by environment, and this
When interiors of products alternating pressure be 0kPa~100kPa~0kPa (gauge pressure).So as to reach -50kPa~50kPa~-50kPa (tables
Pressure) negative pressure pressure alternation test.Environmental chamber pressure carries out releasing pressure automatically by pressure-reducing valve, and stable-pressure device carries out automatic compensation,
Interiors of products pressure is controlled by pressure alternation test platform.
The beneficial effects of the invention are as follows：
Compared with prior art, this negative pressure pressure alternation test apparatus and method realize the negative pressure pressure alternation of fuel tank class
Experiment, and pressure parameter control is accurately and stably, and reliable foundation, guarantee technical parameter satisfaction are provided for the design identification of product
Main frame requirement.
Brief description of the drawings
Fig. 1 is the structure chart of the present invention；
In figure：1- sources of the gas, 2- stable-pressure devices, 3- environmental chamber pressure-regulating valves, 4- air pipe lines, 5- pressure sensors, 6-
Environmental chamber, 7- pressure alternation test platforms, 8- relief valves.
Embodiment
Technical scheme is described further below in conjunction with accompanying drawing, but required protection domain does not limit to
In described；
As shown in figure 1, negative pressure pressure alternation test device provided by the invention, including low-pressure gas source 1, stable-pressure device 2, ring
Border lock pressure force regulating valve 3, environmental chamber 6 and relief valve 8.Low-pressure gas source 1, stable-pressure device 2, environmental chamber pressure-regulating valve 3, environmental chamber
6 and pressure-reducing valve 8 connected by air pipe line 4, pressure sensor 5 detect pressure, pressure alternation test platform 7 provide alternating pressure and
Remaining test, which is matched somebody with somebody, applies mechanically alternate system.
(the manufacturer of stable-pressure device 2：Fenghua Aurion that hydraulic pressure Co., Ltd, model：NXQ-A-16-10-F-Y) can be in ring
When the pressure of border cabin 6 is less than required value, the pressure value detected by pressure sensor 5 carries out automatic compensation, and is tried for pressure alternation
Test platform 7 and alternating pressure is provided.
Relief valve 8 can be when pressure be higher than required value, and the pressure value detected by pressure sensor 5 carries out releasing pressure automatically.
Guizhou Anji Hua Yuan developments in science and technology Co., Ltd pressure alternation test is integrated in by the function of pressure value automatic compensation or pressure release
In platform system, the model of pressure alternation test platform 7：16DYJBSYT-01, manufacturer：The first development in science and technology of Guizhou Anji China is limited
Company.
Pressure alternation test platform 7 can be monitored control and record to test frequency, pressure, temperature and number.
Above-mentioned negative pressure pressure alternation test apparatus and method comprise the following steps：
By taking certain oil tank pressures cycle fatigue test as an example,
1st, all pipelines of the oil tank in addition to ventilating opening, the fuel feeding mouth of pipe, oil return opening are blocked with plug, by test joint
Ventilating opening, the fuel feeding mouth of pipe, oil return opening accordingly are connected to, and is connected to connecting tubes on pressure alternation test platform 7.
2nd, after connecting, oiling 14.5L ± 0.5L is first carried out to oil tank, oiling process pays attention to observing whole experiment oil circuit
See whether permeability.
3rd, after fluid oil level reaches test requirements document, circulation position is arrived into the regulation of the functional switch of pressure alternation test platform 7, kept
Oil circulation, and oil liquid temperature is configured at 180 DEG C, start the heating system of pressure alternation test platform 7, fluid is added
Temperature.
4th, after oil liquid temperature reaches test requirements document, experimental enviroment hatch door is closed, surpassed in the pressure digital display meter of environmental chamber 6
Pressure is arranged on 50kPa, after setting completed closes environmental chamber relief valve 8, environmental chamber pressure-regulating valve 3 is opened.
5th, adjusting ambient lock pressure force regulating valve 3 is carried out to the pressurising of environmental chamber 6, until the pressure of environmental chamber 6 reach 50kPa (when
It can be mended when environmental pressure is more than 50kPa by the releasing pressure automatically of relief valve 8 when environmental pressure is less than 50kPa by gas cylinder
Pressure), circulation after reaching 100kPa, is set slowly to product pressurising 100kPa with stable-pressure device 2 by pressure alternation test platform 7
Number 5000, frequency are 4 times/min, then start to test, and product pressure is circulated in 0~100kPa~0, environmental pressure is all the time
50kPa is maintained at, so as to realize the pressure alternation test for requiring parameter -50kPa~50kPa~-50kPa.
6th, after the completion of testing, first by interiors of products pressure pressure release, then by the pressure release of environmental chamber 6, after pressure release, by oil tank
Interior oil all draws back the fuel tank of pressure alternation test platform 7.
7th, dismantle product, oil checks product appearance after draining, visual product outward appearance without abnormalities such as deformation, crackles,
Pressures cycle fatigue test finishes, success of the test.
Claims (8)
1. a kind of negative pressure pressure alternation test method, including inner chamber fill the fuel tank of fluid, it is characterised in that：The fuel tank is put
In constant pressure be PEnvironmentEnvironment in, heat and circulate fuel tank inner fluid, while to applying constant alternation pressure in fuel tank inner chamber
Power PInner chamber min~PInner chamber max~PInner chamber min, and PInner chamber min＜ PEnvironment＜ PInner chamber max。
A kind of 2. negative pressure pressure alternation test device, it is characterised in that：Including pressure alternation test platform (7) and its environmental chamber (6),
The environmental chamber (6) is connected with pressure sensor (5), air inlet pipeline and gas exhaust piping respectively；
The air inlet pipeline includes source of the gas (1), stable-pressure device (2) and the environmental chamber pressure-regulating valve (3) being sequentially connected；
The gas exhaust piping includes relief valve (8).
A kind of 3. negative pressure pressure alternation test device according to claim 2, it is characterised in that：The source of the gas (1) and steady
The pressure of pressure device (2) is 0.6MPa or so.
A kind of 4. negative pressure pressure alternation test device according to claim 2, it is characterised in that：The stable-pressure device (2)
When environment lock pressure (6) pressure is less than required value, the pressure value detected by pressure sensor (5) carries out automatic compensation.
A kind of 5. negative pressure pressure alternation test device according to claim 2, it is characterised in that：The relief valve (8) exists
When pressure is higher than required value, the pressure value detected by pressure sensor (5) carries out releasing pressure automatically.
A kind of 6. test method using the negative pressure pressure alternation test device of claim 2,3,4 or 5, it is characterised in that
Comprise the following steps：
(a) fuel tank is put into the environmental chamber (6) of pressure alternation test platform (7) and connected, close hatch door oiling liquid into fuel tank；
(b) source of the gas (1) is opened, is P by environmental chamber pressure-regulating valve (3) adjusting ambient cabin (6) pressureEnvironment；
(c) Opening pressure Alternating Test platform (7), heating oil liquid temperature to assigned temperature and are circulated, passed through stable-pressure device (2)
Alternating pressure P is passed through to fuel tankInner chamber min~PInner chamber max~PInner chamber min, wherein PInner chamber min＜ PEnvironment＜ PInner chamber max, set alternating pressure frequency
For r times/min, number is t times.
A kind of 7. test method according to claim 6, it is characterised in that：In the step (a), fluid accounts for fuel tank inner chamber
2/3 volume.
A kind of 8. test method according to claim 6, it is characterised in that：In the step (b), PEnvironment=50kPa, institute
State the alternating pressure P being passed through in step (c)Inner chamber min~PInner chamber max~PInner chamber minFor 0kPa~100kPa~0kPa, frequency r=4 times/
Min, number t=5000 times.
Priority Applications (1)
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| CN201710779867.5A CN107449657A (en) | 2017-09-01 | 2017-09-01 | A kind of negative pressure pressure alternation test method and apparatus |
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| CN201710779867.5A CN107449657A (en) | 2017-09-01 | 2017-09-01 | A kind of negative pressure pressure alternation test method and apparatus |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108254211A (en) * | 2018-03-15 | 2018-07-06 | 核工业理化工程研究院 | A kind of vacuum equipment external environment simulator and method |
| CN111060297A (en) * | 2019-12-06 | 2020-04-24 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Enhanced test equipment, method and device |
| CN111537167A (en) * | 2020-06-01 | 2020-08-14 | 中车戚墅堰机车车辆工艺研究所有限公司 | Negative pressure test system and negative pressure test method for gear box |
| CN111811760A (en) * | 2020-08-12 | 2020-10-23 | 中国人民解放军海军工程大学 | Plate frame model strength/rigidity test system |
| CN111982723A (en) * | 2020-07-22 | 2020-11-24 | 中联重科股份有限公司 | Pressure vessel pulse fatigue test device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108254211A (en) * | 2018-03-15 | 2018-07-06 | 核工业理化工程研究院 | A kind of vacuum equipment external environment simulator and method |
| CN111060297A (en) * | 2019-12-06 | 2020-04-24 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Enhanced test equipment, method and device |
| CN111537167A (en) * | 2020-06-01 | 2020-08-14 | 中车戚墅堰机车车辆工艺研究所有限公司 | Negative pressure test system and negative pressure test method for gear box |
| CN111982723A (en) * | 2020-07-22 | 2020-11-24 | 中联重科股份有限公司 | Pressure vessel pulse fatigue test device |
| CN111811760A (en) * | 2020-08-12 | 2020-10-23 | 中国人民解放军海军工程大学 | Plate frame model strength/rigidity test system |
| CN111811760B (en) * | 2020-08-12 | 2022-08-19 | 中国人民解放军海军工程大学 | Plate frame model strength/rigidity test system |
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