CN111006842A - Novel inflatable sealing system and method for wind tunnel test - Google Patents
Novel inflatable sealing system and method for wind tunnel test Download PDFInfo
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- CN111006842A CN111006842A CN201911204334.XA CN201911204334A CN111006842A CN 111006842 A CN111006842 A CN 111006842A CN 201911204334 A CN201911204334 A CN 201911204334A CN 111006842 A CN111006842 A CN 111006842A
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- 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
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- G01M9/065—Measuring arrangements specially adapted for aerodynamic testing dealing with flow
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Abstract
The utility model provides a wind-tunnel test is with novel inflatable seal system and method, in to prior art at present, the inflatable seal of traditional wind-tunnel test only can rely on stop valve manual control, sealed site noise is big, the problem that the operation danger is high, through two-way solenoid valves, two three-way solenoid valves have realized the automatic control of high pressure, middling pressure gas circuit and total gas circuit respectively, can select the corresponding mode of admitting air according to the required inflation pressure of concrete airtight system simultaneously, reduce the complexity that only can rely on manual stop valve to carry out control measure, the operational safety has been promoted simultaneously.
Description
Technical Field
The invention relates to a novel inflatable sealing system and method for a wind tunnel test, and belongs to the field of wind tunnel tests.
Background
The flange section is sealed in the wind tunnel test, which is an important guarantee for guaranteeing the flow field quality of the wind tunnel and improving the blowing quality of the wind tunnel. In the prior blowing test, the realization of inflation sealing is realized by the manual opening and closing of a plurality of manual stop valves, the stop valves are close to high-pressure and medium-pressure pipelines, the noise of inflation and deflation is high, and the potential safety hazard is great. The manual opening and closing of the stop valve is poor in efficiency and high in labor intensity, and the efficiency of a blowing test is seriously influenced.
Disclosure of Invention
The technical problem solved by the invention is as follows: aiming at the problems that in the prior art, the inflatable seal of the traditional wind tunnel test can only be controlled manually by a stop valve, the noise of a sealing field is large, and the operation risk is high, the novel inflatable seal system and the method for the wind tunnel test are provided.
The technical scheme for solving the technical problems is as follows:
the utility model provides a wind-tunnel test is with novel inflatable seal system, advances the gas circuit, two three way solenoid valves, relief valve, inflation channel including high-pressure, middling pressure, wherein:
high-pressure gas inlet circuit: inputting high-pressure gas source gas to be inflated at an input end, filtering gas source impurities of the gas, reducing the pressure of the filtered gas to the pressure required by inflation sealing when a high-pressure gas inlet path is a passage, and conveying the decompressed gas to a two-position three-way electromagnetic valve;
medium-pressure gas inlet circuit: inputting gas source gas to be inflated, filtering gas source impurities of the gas, reducing the pressure of the filtered gas to the pressure required by inflation sealing when a medium-pressure gas inlet path is a passage, and conveying the gas to a two-position three-way electromagnetic valve in a one-way mode;
two-position three-way electromagnetic valve: the output gas of the high-pressure gas inlet circuit and the medium-pressure gas inlet circuit is gated through external control;
a safety valve: when the pressure of the high-pressure air inlet path is overhigh, the path is closed to protect the air charging path and the two-position three-way electromagnetic valve;
an inflation passage: and monitoring the pressure of the gas gated and output by the two-position three-way electromagnetic valve, and sealing and inflating the outside.
The high-pressure air inlet path comprises a high-pressure filter, a high-pressure stop valve, a high-pressure reducing valve and a two-position two-way electromagnetic valve, high-pressure air source impurities are filtered by the high-pressure filter, filtered air is subjected to pressure reduction to the pressure required by air-inflation sealing through the high-pressure reducing valve after passing through the high-pressure stop valve, and the filtered air is gated and output through the two-position two-way electromagnetic valve.
The medium-pressure air inlet path comprises a medium-pressure filter, a medium-pressure stop valve, a medium-pressure reducing valve, a two-position two-way electromagnetic valve and a one-way valve, wherein medium-pressure air source gas filters air source impurities through the medium-pressure filter, the filtered gas is subjected to pressure reduction to the pressure required by air-inflation sealing through the medium-pressure reducing valve after passing through the medium-pressure stop valve, the pressure is gated and output through the two-position two-way electromagnetic valve, and meanwhile, when the medium-pressure air inlet path does not need to be inflated, the high-pressure air source gas is prevented from backfl.
And the two-position two-way electromagnetic valve in the high-pressure air inlet circuit and the medium-pressure air inlet circuit is used for gating and controlling the high-pressure air inlet circuit and the medium-pressure air inlet circuit, so that only one path or mixture of the air in the high-pressure air inlet circuit and the medium-pressure air inlet circuit is output.
The output ports of the high-pressure gas inlet circuit and the medium-pressure gas inlet circuit are respectively provided with a pressure gauge for monitoring the output high-pressure gas and the output medium-pressure gas, and if the gas pressure is abnormal, the safety valve is closed and the gas charging is stopped.
A novel inflation sealing method for a wind tunnel test comprises the following steps:
(1) the high-pressure reducing valve and the medium-pressure reducing valve are subjected to pressure reduction setting according to gas pressure required by inflation, and high-pressure gas source gas and medium-pressure gas source gas are respectively input from the input end of the high-pressure gas inlet circuit and the input end of the medium-pressure gas inlet circuit;
(2) respectively filtering impurities of high-pressure gas source gas and medium-pressure gas source gas through a high-pressure filter and a medium-pressure filter, reducing the pressure of the high-pressure gas source gas entering a high-pressure reducing valve through a high-pressure stop valve to the gas pressure required by inflation, and reducing the pressure of the medium-pressure gas source gas entering the medium-pressure reducing valve through a medium-pressure stop valve to the gas pressure required by inflation;
(3) monitoring the output gas pressure of the high-pressure gas inlet circuit and the medium-pressure gas inlet circuit through a pressure gauge, and if the gas pressure is not abnormal, carrying out gating output to the inflation channel through a two-position three-way electromagnetic valve;
(4) and detecting the gas pressure at the input end of the inflation passage, and if the input gas pressure is not abnormal, performing external sealing inflation.
The high-pressure gas inlet circuit and the medium-pressure gas inlet circuit are controlled to be on and off through stop valves, and whether gas needs to be fed together or one of the gas needs to be fed independently is judged according to the gas pressure required by the current inflatable seal.
Compared with the prior art, the invention has the advantages that:
according to the novel inflation sealing system and method for the wind tunnel test, whether two air inlet paths need to be jointly fed or respectively fed or independently fed in different time periods can be judged according to inflation pressure required by the inflation sealing system, automatic control of closing and opening of the high-pressure branch and the medium-pressure branch is achieved through two-position two-way electromagnetic valves on the two air inlet paths, automatic control of inflation and deflation of the wind tunnel sealing system is achieved through an external two-position three-way electromagnetic valve, the complexity of control measures which can only be achieved through a manual stop valve is reduced, and meanwhile operation safety is improved.
Drawings
FIG. 1 is a schematic view of a pneumatic sealing system according to the present invention;
Detailed Description
The utility model provides a wind-tunnel test is with novel inflatable seal system adjusts aerifing required pressure through aerifing in inflatable seal, realizes carrying out remote control to inflatable seal system, as shown in figure 1, mainly including high-pressure advance the gas circuit, the gas circuit is advanced to the middling pressure, two three way solenoid valves, relief valve, inflation route, each part function and work flow as follows:
the high-pressure gas inlet path is used for inputting high-pressure gas source gas to be inflated through the input end, gas source impurity filtering is carried out on the gas, the pressure of the filtered gas is reduced to the pressure required by inflation sealing when the high-pressure gas inlet path is a passage, and the decompressed gas is conveyed to the two-position three-way electromagnetic valve; the medium-pressure gas inlet path inputs gas of a medium-pressure gas source to be inflated, gas source impurity filtration is carried out on the gas, and when the medium-pressure gas inlet path is a path, the pressure of the filtered gas is reduced to the pressure required by inflation sealing and is conveyed to the two-position three-way electromagnetic valve in a one-way mode; through external control, a two-position three-way electromagnetic valve is controlled to carry out gating control on gas output by a high-pressure gas inlet circuit and a medium-pressure gas inlet circuit; monitoring the air pressure of the gated output air of the two-position three-way electromagnetic valve in the inflation passage, and carrying out external sealing inflation;
in the inflation sealing system, safety valves are arranged between the output ends of the high-pressure air inlet circuit and the medium-pressure air inlet circuit and the two-position three-way electromagnetic valve, and when the pressure of the high-pressure air inlet circuit is too high, the circuit is closed to protect the inflation circuit and the two-position three-way electromagnetic valve.
The high-pressure gas inlet path comprises a high-pressure filter, a high-pressure stop valve, a high-pressure reducing valve and a two-position two-way electromagnetic valve, high-pressure gas source impurities are filtered by the high-pressure filter, the filtered gas is subjected to pressure reduction on the high-pressure reducing valve through the high-pressure stop valve to reach the pressure required by gas-filled sealing, and the gas is gated and output through the two-position two-way electromagnetic valve;
the medium-pressure gas inlet circuit comprises a medium-pressure filter, a medium-pressure stop valve, a medium-pressure reducing valve, a two-position two-way electromagnetic valve and a one-way valve, medium-pressure gas source impurities are filtered by the medium-pressure filter, the filtered gas is subjected to pressure reduction to the pressure required by gas filling sealing by the medium-pressure reducing valve after passing through the medium-pressure stop valve, the pressure is gated and output by the two-position two-way electromagnetic valve, and meanwhile, when the medium-pressure gas inlet circuit does not need to be filled with gas, the high-pressure gas source gas is prevented from backflushi;
the output ports of the high-pressure gas inlet circuit and the medium-pressure gas inlet circuit are respectively provided with a pressure gauge for monitoring the output high-pressure gas and the output medium-pressure gas, and if the gas pressure is abnormal, the safety valve is closed and the gas charging is stopped.
According to the specific requirements of the inflation sealing task, judging whether two paths of simultaneous air intake, one path of independent air intake or mixed air intake at different time periods are needed, and if the one path of independent air intake or the simultaneous air intake is needed, controlling the on-off through stop valves; if mixed air inlet is required to be carried out in different time periods, the two-position two-way electromagnetic valve in the high-pressure air inlet circuit and the medium-pressure air inlet circuit is used for gating and controlling the high-pressure air inlet circuit and the medium-pressure air inlet circuit.
According to the provided inflation sealing system, a novel inflation sealing method for a wind tunnel test is provided, and the method comprises the following specific steps:
(1) the high-pressure reducing valve and the medium-pressure reducing valve are subjected to pressure reduction setting according to gas pressure required by inflation, and high-pressure gas source gas and medium-pressure gas source gas are respectively input from the input end of the high-pressure gas inlet circuit and the input end of the medium-pressure gas inlet circuit;
(2) respectively filtering impurities of high-pressure gas source gas and medium-pressure gas source gas through a high-pressure filter and a medium-pressure filter, reducing the pressure of the high-pressure gas source gas entering a high-pressure reducing valve through a high-pressure stop valve to the gas pressure required by inflation, and reducing the pressure of the medium-pressure gas source gas entering the medium-pressure reducing valve through a medium-pressure stop valve to the gas pressure required by inflation;
(3) monitoring the output gas pressure of the high-pressure gas inlet circuit and the medium-pressure gas inlet circuit through a pressure gauge, and if the gas pressure is not abnormal, carrying out gating output to the inflation channel through a two-position three-way electromagnetic valve;
(4) and detecting the gas pressure at the input end of the inflation passage, and if the input gas pressure is not abnormal, performing external sealing inflation.
Meanwhile, when the medium pressure is lower than 1.2MPa, the high pressure is started for inflation, the inflation pressure is guaranteed to reach the standard pressure of 1.2MPa, and the cost of the high-pressure gas is higher than that of the medium-pressure gas in view of the cost, so that the high-pressure gas and the medium-pressure gas can be simultaneously started when the low-pressure gas is lower than 1.2MPa, the cost can be saved, the gas supply efficiency can be improved, and the gas supply time can be further shortened under the condition that two paths of gas supply are carried out simultaneously.
In conclusion, the gas supply can be realized by adopting the conditions of independent gas supply and double-path gas supply under the condition of different gas source pressures.
The following is further illustrated with reference to specific examples:
in the embodiment, the high-pressure gas inlet circuit and the medium-pressure gas inlet circuit are required to be used for jointly feeding gas, the stop valves of the two gas inlet circuits are opened firstly, gas feeding is started, gas of a high-pressure gas source is filtered by a filter, and impurities in the gas source are filtered out, so that the stop valves, the pressure reducing valve and the electromagnetic valve are prevented from being damaged by the impurities at the downstream; reducing the pressure of the two paths of inlet air by using a pressure reducing valve respectively, reducing the pressure of high-pressure gas from 22MPa to 1.2MPa, and reducing the pressure of low-pressure gas from 2.5MPa to 1.2MPa, wherein the sealing effect of an external system is best under the pressure;
and the gas passing through the two-position two-way electromagnetic valve of each gas inlet channel is mixed in the two-position three-way electromagnetic valve, whether the pressure of the mixed gas is within a safety range is determined, and the mixed gas with normal pressure is output to realize the inflation sealing of an external system. The inflation gas selected may be an inert gas or other gas mixture that meets the sealing requirements.
The technology not disclosed by the invention belongs to the technical field.
Claims (7)
1. The utility model provides a wind-tunnel test is with novel inflatable seal system which characterized in that: including high-pressure air inlet circuit, well pressure air inlet circuit, two three-way solenoid valve, relief valve, inflation circuit, wherein:
high-pressure gas inlet circuit: inputting high-pressure gas source gas to be inflated at an input end, filtering gas source impurities of the gas, reducing the pressure of the filtered gas to the pressure required by inflation sealing when a high-pressure gas inlet path is a passage, and conveying the decompressed gas to a two-position three-way electromagnetic valve;
medium-pressure gas inlet circuit: inputting gas source gas to be inflated, filtering gas source impurities of the gas, reducing the pressure of the filtered gas to the pressure required by inflation sealing when a medium-pressure gas inlet path is a passage, and conveying the gas to a two-position three-way electromagnetic valve in a one-way mode;
two-position three-way electromagnetic valve: the output gas of the high-pressure gas inlet circuit and the medium-pressure gas inlet circuit is gated through external control;
a safety valve: when the pressure of the high-pressure air inlet path is overhigh, the path is closed to protect the air charging path and the two-position three-way electromagnetic valve;
an inflation passage: and monitoring the pressure of the gas gated and output by the two-position three-way electromagnetic valve, and sealing and inflating the outside.
2. The novel inflatable sealing system for the wind tunnel test according to claim 1, wherein: the high-pressure air inlet path comprises a high-pressure filter, a high-pressure stop valve, a high-pressure reducing valve and a two-position two-way electromagnetic valve, high-pressure air source impurities are filtered by the high-pressure filter, filtered air is subjected to pressure reduction to the pressure required by air-inflation sealing through the high-pressure reducing valve after passing through the high-pressure stop valve, and the filtered air is gated and output through the two-position two-way electromagnetic valve.
3. The novel inflatable sealing system for the wind tunnel test according to claim 1, wherein: the medium-pressure air inlet path comprises a medium-pressure filter, a medium-pressure stop valve, a medium-pressure reducing valve, a two-position two-way electromagnetic valve and a one-way valve, wherein medium-pressure air source gas filters air source impurities through the medium-pressure filter, the filtered gas is subjected to pressure reduction to the pressure required by air-inflation sealing through the medium-pressure reducing valve after passing through the medium-pressure stop valve, the pressure is gated and output through the two-position two-way electromagnetic valve, and meanwhile, when the medium-pressure air inlet path does not need to be inflated, the high-pressure air source gas is prevented from backfl.
4. The novel inflatable sealing system for the wind tunnel test according to claim 1, wherein: and the two-position two-way electromagnetic valve in the high-pressure air inlet circuit and the medium-pressure air inlet circuit is used for gating and controlling the high-pressure air inlet circuit and the medium-pressure air inlet circuit, so that only one path or mixture of the air in the high-pressure air inlet circuit and the medium-pressure air inlet circuit is output.
5. The novel inflatable sealing system for the wind tunnel test according to claim 4, wherein: the output ports of the high-pressure gas inlet circuit and the medium-pressure gas inlet circuit are respectively provided with a pressure gauge for monitoring the output high-pressure gas and the output medium-pressure gas, and if the gas pressure is abnormal, the safety valve is closed and the gas charging is stopped.
6. The novel inflation sealing system for the wind tunnel test according to claim 1 provides a novel inflation sealing method for the wind tunnel test, and is characterized by comprising the following steps:
(1) the high-pressure reducing valve and the medium-pressure reducing valve are subjected to pressure reduction setting according to gas pressure required by inflation, and high-pressure gas source gas and medium-pressure gas source gas are respectively input from the input end of the high-pressure gas inlet circuit and the input end of the medium-pressure gas inlet circuit;
(2) respectively filtering impurities of high-pressure gas source gas and medium-pressure gas source gas through a high-pressure filter and a medium-pressure filter, reducing the pressure of the high-pressure gas source gas entering a high-pressure reducing valve through a high-pressure stop valve to the gas pressure required by inflation, and reducing the pressure of the medium-pressure gas source gas entering the medium-pressure reducing valve through a medium-pressure stop valve to the gas pressure required by inflation;
(3) monitoring the output gas pressure of the high-pressure gas inlet circuit and the medium-pressure gas inlet circuit through a pressure gauge, and if the gas pressure is not abnormal, carrying out gating output to the inflation channel through a two-position three-way electromagnetic valve;
(4) and detecting the gas pressure at the input end of the inflation passage, and if the input gas pressure is not abnormal, performing external sealing inflation.
7. The novel inflation sealing method for the wind tunnel test according to claim 6, characterized in that: the high-pressure gas inlet circuit and the medium-pressure gas inlet circuit are controlled to be on and off through stop valves, and whether gas needs to be fed together or one of the gas needs to be fed independently is judged according to the gas pressure required by the current inflatable seal.
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| CN201911204334.XA CN111006842A (en) | 2019-11-29 | 2019-11-29 | Novel inflatable sealing system and method for wind tunnel test |
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| CN201911204334.XA CN111006842A (en) | 2019-11-29 | 2019-11-29 | Novel inflatable sealing system and method for wind tunnel test |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111006841A (en) * | 2019-11-29 | 2020-04-14 | 中国航天空气动力技术研究院 | Wide-area air inlet pressure regulating system for hypersonic wind tunnel |
| CN111751074A (en) * | 2020-07-01 | 2020-10-09 | 中国科学院力学研究所 | Detonation-driven high-enthalpy shock tunnel automatic inflation control system |
| CN112326156A (en) * | 2020-10-29 | 2021-02-05 | 清华大学 | High-pressure gas seal that can set for dwell time detects and uses test system |
| CN112611540A (en) * | 2020-12-30 | 2021-04-06 | 中国航天空气动力技术研究院 | Flexible inflation wind tunnel test model pressure self-adaptive adjusting device and method |
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| CN2676171Y (en) * | 2004-02-26 | 2005-02-02 | 中国科学院力学研究所 | Overpressure protection device used in shock tunnel charge system driven by detonation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111006841A (en) * | 2019-11-29 | 2020-04-14 | 中国航天空气动力技术研究院 | Wide-area air inlet pressure regulating system for hypersonic wind tunnel |
| CN111006841B (en) * | 2019-11-29 | 2022-07-05 | 中国航天空气动力技术研究院 | Wide-area air inlet pressure regulating system for hypersonic wind tunnel |
| CN111751074A (en) * | 2020-07-01 | 2020-10-09 | 中国科学院力学研究所 | Detonation-driven high-enthalpy shock tunnel automatic inflation control system |
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| CN112326156B (en) * | 2020-10-29 | 2021-07-30 | 清华大学 | High-pressure gas seal that can set for dwell time detects and uses test system |
| CN112611540A (en) * | 2020-12-30 | 2021-04-06 | 中国航天空气动力技术研究院 | Flexible inflation wind tunnel test model pressure self-adaptive adjusting device and method |
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