CN117386836B - Quick response coaxial valve suitable for pulse wind tunnel and application method thereof - Google Patents
Quick response coaxial valve suitable for pulse wind tunnel and application method thereof Download PDFInfo
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- CN117386836B CN117386836B CN202311711706.4A CN202311711706A CN117386836B CN 117386836 B CN117386836 B CN 117386836B CN 202311711706 A CN202311711706 A CN 202311711706A CN 117386836 B CN117386836 B CN 117386836B
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000012360 testing method Methods 0.000 claims abstract description 89
- 238000007789 sealing Methods 0.000 claims abstract description 16
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 16
- 238000010586 diagram Methods 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/0227—Packings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/04—Construction of housing; Use of materials therefor of sliding valves
- F16K27/044—Construction of housing; Use of materials therefor of sliding valves slide valves with flat obturating members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
- F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention belongs to the technical field of pulse wind tunnel tests, and discloses a quick response coaxial valve suitable for a pulse wind tunnel and a use method thereof. The quick response coaxial valve comprises an upper end cover, an upper valve body and a lower valve seat which are sequentially connected from top to bottom, wherein vertical valve cores are arranged in central cavities of the upper end cover and the upper valve body, a horizontal test gas channel communicated with a gas pipeline is arranged in the lower valve seat, the upstream of the test gas channel is an air inlet, and the downstream of the test gas channel is an air outlet; in the process of up-and-down sliding of the valve core, the upper limit of the tail end of the valve core is higher than the test air channel, the air inlet and the air outlet are communicated in an open state, the lower limit of the tail end of the valve core is lower than the test air channel, and the air inlet and the air outlet are blocked in a closed state. The quick response coaxial valve is reliable in sealing, and can be well applied in a low-pressure state or a high-pressure state of test gas, wherein the opening and closing of the quick response coaxial valve are not influenced by the upstream test gas pressure of the valve body; the using method has the advantages of quick response, simple operation and good application prospect.
Description
Technical Field
The invention belongs to the technical field of pulse wind tunnel tests, and particularly relates to a quick response coaxial valve suitable for a pulse wind tunnel and a use method thereof.
Background
The pulse wind tunnel can simulate the physical and chemical process of the bypass flow field in the ultra-high speed flight process of the aircraft more truly. In the pulse wind tunnel, direct connection tests, jet flow tests, super-combustion tests and other tests are carried out, fuel or other gas mediums are often required to be injected as test gas, the injection test gas is synchronous with the start of the pulse wind tunnel, and a common mode is to take a pulse wind tunnel start signal as a trigger signal. Because the diaphragm between the high-pressure section and the low-pressure section of the pulse wind tunnel is unstable in rupture, a pressure signal downstream of the diaphragm is also used as a trigger signal. However, the effective test time of the pulse wind tunnel is only tens of milliseconds at the longest, and even is only a few milliseconds in the pulse wind tunnel with a short length in the high-pressure section or in the low-pressure section, which puts a severe requirement on the response capability of the electromagnetic valve, namely the switch for injecting test gas on the model.
However, the response time of the commercially available electromagnetic valve is more than tens of milliseconds, the response time of the electromagnetic valve is related to the gas pressure at the upstream of the electromagnetic valve, a great deal of time is required to overcome the inertia force generated by the gas pressure at the upstream of the electromagnetic valve, and the requirements of direct connection tests, jet tests, super-combustion tests and other tests in a pulse wind tunnel are difficult to meet.
Currently, there is a need to develop a fast response coaxial valve suitable for pulse wind tunnels and methods of use thereof.
Disclosure of Invention
The invention aims to provide a quick response coaxial valve suitable for a pulse wind tunnel, and aims to provide a use method of the quick response coaxial valve suitable for the pulse wind tunnel.
The quick response coaxial valve suitable for the pulse wind tunnel is characterized in that the quick response coaxial valve is arranged on a gas pipeline, and the applicable pressure range is 0.1-50 MPa; the quick response coaxial valve comprises an upper end cover, an upper valve body and a lower valve seat which are sequentially connected from top to bottom, wherein vertical valve cores are arranged in central cavities of the upper end cover and the upper valve body, a horizontal test gas channel communicated with a gas pipeline is arranged in the lower valve seat, the upstream of the test gas channel is an air inlet, and the downstream of the test gas channel is an air outlet;
the valve core is a stepped cylinder, the outer diameters of the upper section and the lower section of the valve core are the same, the middle section of the valve core protrudes to form a piston, and a central cavity of the upper valve body is divided into an upper cylinder and a lower cylinder; the upper cylinder is provided with an upper through hole, the lower cylinder is provided with a lower through hole, and the upper through hole and the lower through hole are respectively connected with a pneumatic control valve; the top end of the valve core extends out of the upper end cover; in the process of up-and-down sliding of the valve core, the tail end of the valve core is provided with an upper limit and a lower limit, the upper limit is higher than the test gas channel, the air inlet and the air outlet are communicated, the quick response coaxial valve is in an open state, the lower limit is lower than the test gas channel, the air inlet and the air outlet are separated, and the quick response coaxial valve is in a closed state;
in the lower valve seat, an annular balance chamber is arranged on the inner wall of the lower valve seat corresponding to the lower limit of the valve core, the balance chamber is communicated with an air inlet at the upstream of the test air channel, the contact area between the balance chamber and the valve core is S1, S1=pi (d 2) 2 -d1 2 ) And/4, the contact area of the valve core and the air inlet at the upstream of the test air channel is S2, and S2=pi d 2 4, s1=s2; wherein d is the inner diameter of the air inlet, d1 is the outer diameter of the balance chamber, and d2 is the inner diameter of the balance chamber.
Further, the components of the quick response coaxial valve are sealed by sealing elements; the sealing piece is a sealing ring, and the sealing ring is a low-friction rubber sealing ring.
Further, the pneumatic control valve is a 2-position 3-pneumatic control valve; the control gas pressure of the pneumatic control valve is smaller than the test gas pressure in the gas pipeline; the pneumatic control valve connected with the upper through hole is a normally open type pneumatic valve, and the pneumatic control valve connected with the lower through hole is a normally closed type coaxial valve.
Further, the upper end of the upper valve body is fixed on the upper end cover through the flange plate by fastening screws distributed along the circumferential direction, and the lower end of the upper valve body is fixed on the lower valve seat through the flange plate by fastening screws distributed along the circumferential direction.
The invention discloses a use method of a quick response coaxial valve suitable for a pulse wind tunnel, which comprises the following steps:
s10, installing a quick response coaxial valve on a gas pipeline, wherein a test gas channel is communicated with the gas pipeline;
s20, connecting the upper through hole with a normally open type pneumatic valve, filling control gas into the upper cylinder, simultaneously connecting the lower through hole with a normally closed type coaxial valve, exhausting air of the lower cylinder through an exhaust hole of the normally closed type pneumatic valve, enabling the valve core to move downwards, isolating the air inlet from the air outlet, and disconnecting a test gas channel;
s30, before the pulse wind tunnel test, the air inlet is filled with test gas, the air inlet is communicated with the balance chamber, and the test gas of the air inlet is filled into the balance chamber;
s40, when in a pulse wind tunnel test, a pulse wind tunnel inflow sensor gives out a starting trigger signal, a normally open type pneumatic valve of an upper through hole is powered on, and an upper cylinder exhausts air through an exhaust hole of the normally open type pneumatic valve; meanwhile, the normally closed coaxial valve of the lower through hole is electrified, operating gas enters the lower cylinder, the valve core moves upwards, the valve core of the main valve is opened, and the test gas channel is communicated;
s50, after the pulse wind tunnel test, starting a trigger signal, closing the normally open pneumatic valve of the upper through hole by a preset duration under the action of a delayer, and charging operating gas into the upper cylinder; meanwhile, the normally closed coaxial valve of the lower through hole is powered off, the lower cylinder exhausts through the exhaust hole of the normally closed pneumatic valve, the valve core moves downwards, the air inlet and the air outlet are blocked, and the test air channel is disconnected.
The quick response coaxial valve suitable for the pulse wind tunnel is provided with the balance chamber on the lower valve seat, the balance chamber is connected with the upstream air inlet of the lower valve seat to form a passage, the contact area S1 of the balance chamber and the valve core is equal to the contact area S2 of the valve core and the upstream air inlet, the pressure difference on two sides of the valve core can be compensated, balance is realized, the valve response time of the quick response coaxial valve is obviously reduced, the opening and closing of the quick response coaxial valve are not influenced by test air pressure, the quick response coaxial valve can be well applied in a low-pressure state or a high-pressure state of test air, and the quick response time can be used in the pulse wind tunnel.
The quick response coaxial valve suitable for the pulse wind tunnel has the following characteristics:
a. the upper cylinder and the lower cylinder of the upper valve body respectively adopt 1 pneumatic control valve with 2 positions and 3 communication as control signals of the quick response coaxial valve, so that the small-pressure control gas drives the large-pressure test gas;
b. the balance chamber is adopted to compensate the pressure difference at two sides of the valve core, so that the valve can be well applied to the low pressure state or the high pressure state of test gas, and the response time of the quick response coaxial valve due to inertia force caused by the pressure difference at two sides is obviously reduced.
The quick response coaxial valve suitable for the pulse wind tunnel is reliable in sealing, is not influenced by the upstream test air pressure of the valve body in opening and closing, can be well applied in a low-pressure state or a high-pressure state of test air, realizes quick on-off of the quick response coaxial valve by driving high-pressure test air through small-pressure operating air, and improves the response capacity of the quick response coaxial valve. The use method of the quick response coaxial valve suitable for the pulse wind tunnel has the advantages of quick response, simple operation and good application prospect in the pulse wind tunnel.
Drawings
FIG. 1 is a schematic diagram of a fast response coaxial valve suitable for use in a pulsed wind tunnel of the present invention;
FIG. 2 is a schematic diagram of the closed state of a fast response coaxial valve suitable for use in a pulsed wind tunnel according to the present invention;
FIG. 3 is a schematic diagram of the open state of a fast response coaxial valve suitable for use in a pulsed wind tunnel of the present invention;
FIG. 4 is a schematic diagram of the installation of the fast response coaxial valve of the present invention in a pulse wind tunnel.
In the figure, 1. An upper end cover; 2. a valve core; 3. an upper cylinder; 4. a lower cylinder; 5. a fastening screw; 6. a lower valve seat; 7. an upper valve body; 8. a seal; 9. a balancing chamber; 10. an upper through hole; 11. a lower through hole; 12. a pneumatically operated valve; 13. a high pressure section; 14. a low pressure section; 15. a membrane; 16. triggering a sensor; 17. a spray pipe; 18. a quick response coaxial valve; 19. a test section; 20. a model; 21. manipulating the gas; 22. and (5) testing gas.
Detailed Description
The invention is described in detail below with reference to the drawings and examples.
The quick response coaxial valve suitable for the pulse wind tunnel is arranged on a gas pipeline, and the applicable pressure range is 0.1-50 MPa; as shown in fig. 1, the quick response coaxial valve 18 comprises an upper end cover 1, an upper valve body 7 and a lower valve seat 6 which are sequentially connected from top to bottom, wherein a vertical valve core 2 is arranged in a central cavity of the upper end cover 1 and the upper valve body 7, a horizontal test gas channel communicated with a gas pipeline is arranged in the lower valve seat 6, the upstream of the test gas channel is an air inlet, and the downstream of the test gas channel is an air outlet;
the valve core 2 is a stepped cylinder, the outer diameters of the upper section and the lower section of the valve core 2 are the same, the middle section of the valve core 2 protrudes to form a piston, and a central cavity of the upper valve body 7 is divided into an upper cylinder 3 and a lower cylinder 4; the upper cylinder 3 is provided with an upper through hole 10, the lower cylinder 4 is provided with a lower through hole 11, and the upper through hole 10 and the lower through hole 11 are respectively connected with a pneumatic control valve 12; the top end of the valve core 2 extends out of the upper end cover 1; in the process of up-and-down sliding of the valve core 2, the tail end of the valve core 2 is provided with an upper limit and a lower limit, the upper limit is higher than the test gas channel, the air inlet and the air outlet are communicated, the quick response coaxial valve 18 is in an open state, the lower limit is lower than the test gas channel, the air inlet and the air outlet are blocked, and the quick response coaxial valve 18 is in a closed state;
in the lower valve seat 6, an annular balance chamber 9 is arranged on the inner wall of the lower valve seat 6 corresponding to the lower limit of the valve core 2, the balance chamber 9 is communicated with an air inlet at the upstream of the test air channel, the contact area of the balance chamber 9 and the valve core 2 is S1, S1=pi d2 2 -d1 2 And/4, the contact area of the valve core 2 and the air inlet at the upstream of the test air channel is S2, S2 = pi d 2 4, s1=s2; where d is the inlet inner diameter, d1 is the outer diameter of the balance chamber 9, and d2 is the inner diameter of the balance chamber 9.
Further, the components of the quick response coaxial valve 18 are sealed by a sealing element 8; the sealing element 8 is a sealing ring, and the sealing ring is a low-friction rubber sealing ring.
Further, the pneumatic control valve 12 is a 2-position 3-pneumatic control valve; the control gas pressure of the pneumatic operated valve 12 is less than the test gas 22 pressure in the gas line; the pneumatic control valve 12 connected with the upper through hole 10 is a normally open pneumatic valve, and the pneumatic control valve 12 connected with the lower through hole 11 is a normally closed coaxial valve.
Further, the upper end of the upper valve body 7 is fixed on the upper end cover 1 through a flange plate by adopting fastening screws 5 distributed along the circumferential direction, and the lower end of the upper valve body 7 is fixed on the lower valve seat 6 through the flange plate by adopting fastening screws 5 distributed along the circumferential direction.
The invention discloses a use method of a quick response coaxial valve suitable for a pulse wind tunnel, which comprises the following steps:
s10, installing a quick response coaxial valve 18 on a gas pipeline, wherein a test gas channel is communicated with the gas pipeline;
s20, connecting the upper through hole 10 with a normally open pneumatic valve, filling operating gas 21 into the upper cylinder 3, simultaneously connecting the lower through hole 11 with a normally closed coaxial valve, exhausting the lower cylinder 4 through an exhaust hole of the normally closed pneumatic valve, moving the valve core 2 downwards, isolating an air inlet from an air outlet, and disconnecting a test gas channel;
s30, before the pulse wind tunnel test, as shown in fig. 2, the air inlet is filled with test gas 22, the air inlet is communicated with the balance chamber 9, and the test gas 22 of the air inlet is filled into the balance chamber 9;
s40, in a pulse wind tunnel test, as shown in FIG. 3, a pulse wind tunnel inflow sensor gives a starting trigger signal, a normally open type pneumatic valve of an upper through hole 10 is powered on, and an upper cylinder 3 exhausts air through an exhaust hole of the normally open type pneumatic valve; meanwhile, the normally closed coaxial valve of the lower through hole 11 is electrified, operating gas 21 enters the lower cylinder 4, the valve core 2 moves upwards, the valve core of the main valve is opened, and the test gas channel is communicated;
s50, after the pulse wind tunnel test, the starting trigger signal is closed by a preset duration under the action of a delayer, the normally open pneumatic valve of the upper through hole 10 is powered off, and the operating gas 21 is filled into the upper cylinder 3; meanwhile, the normally closed coaxial valve of the lower through hole 11 is powered off, the lower cylinder 4 exhausts air through the exhaust hole of the normally closed pneumatic valve, the valve core 2 moves downwards to block the air inlet and the air outlet, and the test air channel is disconnected.
Example 1:
the fast response coaxial valve suitable for the pulse wind tunnel in the embodiment is used for a pulse wind tunnel engine model, as shown in fig. 4, the pulse wind tunnel comprises a high-pressure section 13, a low-pressure section 14, a spray pipe 17 and a test section 19 which are sequentially connected from front to back, a diaphragm 15 is arranged between the high-pressure section 13 and the low-pressure section 14, a model 20 is installed in the test section 19, a gas pipeline for conveying test gas 22 is arranged on the model 20, a fast response coaxial valve 18 is arranged on the gas pipeline, a pneumatic control valve 12 of the fast response coaxial valve 18 is connected with a control gas 21, the fast response coaxial valve 18 is opened, and the test gas 22 enters the model 20.
The pulse wind tunnel operates Mach number 10, through calculation, wind tunnel incoming flow senses starting shock waves from the trigger sensor 16 to the test section 19 for about 20ms, the effective test time is within 5ms, and in order to meet the synchronization of the power-driven fuel and the wind tunnel test, the response time of the quick response coaxial valve 18 is less than 20ms, and the test requirement is met.
Although embodiments of the invention have been disclosed in the foregoing description and illustrated in the drawings, it will be understood by those skilled in the art that the present invention is not limited to the specific details and illustrations of features and steps set forth herein, and that all features of the invention disclosed, or steps of the method or process, except for mutually exclusive features and/or steps, may be combined in any manner without departing from the principles of the invention.
Claims (5)
1. The quick response coaxial valve is characterized in that the quick response coaxial valve (18) is arranged on a gas pipeline, and the applicable pressure range is 0.1-50 MPa; the quick response coaxial valve (18) comprises an upper end cover (1), an upper valve body (7) and a lower valve seat (6) which are sequentially connected from top to bottom, wherein a vertical valve core (2) is arranged in a central cavity of the upper end cover (1) and the upper valve body (7), a horizontal test gas channel communicated with a gas pipeline is arranged in the lower valve seat (6), the upstream of the test gas channel is an air inlet, and the downstream of the test gas channel is an air outlet;
the valve core (2) is a stepped cylinder, the outer diameters of the upper section and the lower section of the valve core (2) are the same, the middle section of the valve core (2) protrudes to form a piston, and a central cavity of the upper valve body (7) is divided into an upper cylinder (3) and a lower cylinder (4); the upper air cylinder (3) is provided with an upper through hole (10), the lower air cylinder (4) is provided with a lower through hole (11), and the upper through hole (10) and the lower through hole (11) are respectively connected with a pneumatic control valve (12); the top end of the valve core (2) extends out of the upper end cover (1); in the vertical sliding process of the valve core (2), the tail end of the valve core (2) is provided with an upper limit and a lower limit, the upper limit is higher than the test gas channel, the air inlet and the air outlet are communicated, the quick response coaxial valve (18) is in an open state, the lower limit is lower than the test gas channel, the air inlet and the air outlet are separated, and the quick response coaxial valve (18) is in a closed state;
in the lower valve seat (6), an annular balance chamber (9) is arranged on the inner wall of the lower valve seat (6) corresponding to the lower limit of the valve core (2), the balance chamber (9) is communicated with an air inlet at the upstream of the test air channel, the contact area of the balance chamber (9) and the valve core (2) is S1, and S1=pi (d 2) 2 -d1 2 ) And/4, the contact area of the valve core (2) and the air inlet at the upstream of the test air channel is S2, S2 = pi d 2 4, s1=s2; wherein d is the inner diameter of the air inlet, d1 is the outer diameter of the balance chamber (9), and d2 is the inner diameter of the balance chamber (9).
2. A quick response coaxial valve for use in impulse tunnels as claimed in claim 1, characterized in, that the components of the quick response coaxial valve (18) are sealed by a seal (8); the sealing piece (8) is a sealing ring, and the sealing ring is a low-friction rubber sealing ring.
3. The quick response coaxial valve for pulsed wind tunnel according to claim 1, characterized in that said pneumatically operated valve (12) is a 2-position 3-way pneumatically operated valve; the control gas pressure of the pneumatic control valve (12) is smaller than the test gas (22) pressure in the gas pipeline; the pneumatic control valve (12) connected with the upper through hole (10) is a normally open type pneumatic valve, and the pneumatic control valve (12) connected with the lower through hole (11) is a normally closed type coaxial valve.
4. The quick response coaxial valve for pulse wind tunnel according to claim 1, wherein the upper end of the upper valve body (7) is fixed on the upper end cover (1) by adopting fastening screws (5) distributed along the circumferential direction through a flange plate, and the lower end of the upper valve body (7) is fixed on the lower valve seat (6) by adopting fastening screws (5) distributed along the circumferential direction through a flange plate.
5. A method of using a fast response coaxial valve for a pulse wind tunnel, which is used for the fast response coaxial valve for a pulse wind tunnel according to any one of claims 1 to 4, and is characterized by comprising the following steps:
s10, installing a quick response coaxial valve (18) on a gas pipeline, wherein a test gas channel is communicated with the gas pipeline;
s20, connecting an upper through hole (10) with a normally open pneumatic valve, filling operating gas (21) into an upper cylinder (3), simultaneously connecting a lower through hole (11) with a normally closed coaxial valve, exhausting air from a lower cylinder (4) through an exhaust hole of the normally closed pneumatic valve, enabling a valve core (2) to move downwards, isolating an air inlet from an air outlet, and disconnecting a test gas channel;
s30, before the pulse wind tunnel test, the air inlet is filled with test gas (22), the air inlet is communicated with the balance chamber (9), and the test gas (22) of the air inlet is filled into the balance chamber (9);
s40, when in a pulse wind tunnel test, a pulse wind tunnel inflow sensor gives out a starting trigger signal, a normally open type pneumatic valve of an upper through hole (10) is powered on, and an upper air cylinder (3) exhausts air through an exhaust hole of the normally open type pneumatic valve; meanwhile, the normally closed coaxial valve of the lower through hole (11) is electrified, operating gas (21) enters the lower cylinder (4), the valve core (2) moves upwards, the valve core of the main valve is opened, and the test gas channel is communicated;
s50, after a pulse wind tunnel test, a starting trigger signal is closed by a time delay device for a preset duration, a normally open pneumatic valve of the upper through hole (10) is powered off, and operating gas (21) is filled into the upper cylinder (3); meanwhile, the normally closed coaxial valve of the lower through hole (11) is powered off, the lower cylinder (4) is exhausted through the exhaust hole of the normally closed pneumatic valve, the valve core (2) moves downwards to block the air inlet and the air outlet, and the test air channel is disconnected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311711706.4A CN117386836B (en) | 2023-12-13 | 2023-12-13 | Quick response coaxial valve suitable for pulse wind tunnel and application method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311711706.4A CN117386836B (en) | 2023-12-13 | 2023-12-13 | Quick response coaxial valve suitable for pulse wind tunnel and application method thereof |
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| CN117386836A CN117386836A (en) | 2024-01-12 |
| CN117386836B true CN117386836B (en) | 2024-02-02 |
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