CN112033690A - Switching device for ground water swallowing test of aero-engine - Google Patents
Switching device for ground water swallowing test of aero-engine Download PDFInfo
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- CN112033690A CN112033690A CN202010922260.XA CN202010922260A CN112033690A CN 112033690 A CN112033690 A CN 112033690A CN 202010922260 A CN202010922260 A CN 202010922260A CN 112033690 A CN112033690 A CN 112033690A
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- 238000012360 testing method Methods 0.000 title claims abstract description 36
- 230000009747 swallowing Effects 0.000 title claims abstract description 23
- 239000003673 groundwater Substances 0.000 title claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 208
- 230000001105 regulatory effect Effects 0.000 claims abstract description 24
- 238000005507 spraying Methods 0.000 claims description 23
- 238000005192 partition Methods 0.000 claims description 17
- 238000005070 sampling Methods 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 6
- 239000008399 tap water Substances 0.000 claims description 4
- 235000020679 tap water Nutrition 0.000 claims description 4
- 239000002699 waste material Substances 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 abstract 1
- 230000033228 biological regulation Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
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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
- G01M15/00—Testing of engines
- G01M15/14—Testing gas-turbine engines or jet-propulsion engines
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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
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
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- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention belongs to the technical field of aero-engine complete machine tests, and relates to a switching device for an aero-engine complete machine water swallowing test, in particular to a ground water swallowing test switching device for an aero-engine. The device comprises water treatment equipment, a water tank, a pressure regulating system and a switching pre-regulating device; by researching a water quantity pre-adjusting device and a quick switching device, factors such as liquid level height difference after switching, pipeline filling and pressure building time, outlet section and the like are comprehensively considered, quick and accurate switching of water for a water swallowing test of the whole engine is realized, and smooth running of the test is guaranteed. The test run time of the whole machine test is saved. The bottom of the pre-adjusting device is provided with a water return pipeline which can be directly returned to the water tank, so that the water tank can be recycled, and waste is avoided. Only 1.5s is consumed from the sending of the switching instruction to the specified flow, the switching time response is fast, and the test water consumption is accurately and quickly adjusted.
Description
Technical Field
The invention belongs to the technical field of aero-engine complete machine tests, and relates to a switching device for a certain type of engine complete machine water swallowing test, in particular to a ground water swallowing test of an aero-engine.
Background
With the enhancement of military requirements on all-weather use of the airplane, the flying capacity of the airplane in rainy days is required to be the necessary capacity of the airplane, the engine is used as equipment working in high-temperature, high-pressure and high-rotating-speed environments, and after a large amount of rainwater is swallowed, a casing can be shrunk due to cooling, the load of a rotor can be increased, and the pressure of an air flow channel can be changed, so that the rotor can be collided and abraded, and the blades can be damaged and surged very possibly. In order to verify a performance change condition of the engine after swallowing a large amount of rainwater, a ground complete machine water swallowing test of the engine needs to be carried out during the development of the engine, and the development of ground complete machine water swallowing equipment needs to be carried out.
At present, in the field of domestic turbojet and turbofan engines, 624 th and 606 th all have similar equipment, and both the two equipment have the defects of low regulation precision and long pipeline pressure building time; the whole water swallowing equipment used by the equipment 606 for the large turbofan engine also faces the problem that the distribution form of engine inlet water cannot be verified, and the water swallowing equipment 624 used by the small turbojet engine cannot meet the use requirement of the medium thrust turbofan engine.
Disclosure of Invention
The purpose of the invention is as follows: with the change of the flight state, the water amount swallowed by the engine is changed, 9 times of switching of water swallowing flow is needed during the whole engine water swallowing test of a certain type of engine, in order to reduce the adjusting time and accurately adjust the water amount sprayed into the engine to enable the water amount to meet the outline requirements, the design research of a switching pre-adjusting device for the ground water swallowing test of the aircraft engine is specially carried out, and the device consists of a pre-adjusting device and a quick switching device, as shown in fig. 1.
The purpose of the invention is as follows: a set of rapid and accurate switching and pre-adjusting device for an aeroengine ground water swallowing test is researched and designed.
Aeroengine ground gulps down quick accurate auto-change over device for water test:
1. developing a set of water quantity pre-adjusting device;
2. designing a set of rapid switching devices through investigation;
3. the flow fluctuation after switching is reduced by comprehensively considering the characteristics of height difference, pipeline pressure build and outlet section.
The technical scheme is as follows:
a switching device for an aircraft engine ground water swallowing test comprises water treatment equipment, a water tank, a pressure regulating system and a switching pre-regulating device;
tap water enters the water treatment equipment through the water supply valve to be purified and then enters the water tank, the upper part of the water tank is provided with an air release hole, the bottom of the water tank is provided with a waterproof valve, the side wall of the water tank is provided with a sampling water valve, and the side wall of the water tank is provided with a water tank return pipeline which is connected with the bottom of a water changing tank in the switching device;
the pressure regulating system comprises a variable frequency water pump, a pressure sensor, a temperature sensor, a filter and a flowmeter which are connected in sequence; a safety valve is arranged between the variable frequency water pump and the pressure sensor and is connected to the side wall of the water tank through a pipeline;
the switching pre-adjusting device comprises a switching valve, a water spraying ring and a water receiving tank; one path of the switching valve is connected with a water spraying ring in the air inlet channel, the other path of the switching valve is connected with a water spraying ring on the water receiving tank, and the shapes, the nozzle layouts and the arrangement heights of the two water spraying rings are consistent; a 120-degree fan-shaped partition plate is arranged at the bottom of the water receiving tank; two water discharging holes connected with a water return pipeline of the water tank are arranged at the bottom of the water receiving tank, one water discharging hole is arranged in the area of the fan-shaped partition plate, and the other water discharging hole is arranged outside the area of the fan-shaped partition plate.
Still include the accumulator, the accumulator sets up between temperature sensor and filter.
The variable frequency water pump is a vertical multi-stage variable frequency water pump.
Still include the air film governing valve, the air film governing valve sets up between filter and flowmeter.
The sampling water valve is 20CM away from the bottom of the water tank.
The safety valve is connected to the side wall of the water tank through a pipeline and is 30CM away from the bottom.
One of the water discharge holes is arranged at the sector center in the sector partition area, and the other water discharge hole is arranged at the central position outside the sector partition area, and the diameter of each water discharge hole is 30 mm.
The segmental baffles have a height of 50 CM.
The water treatment equipment, the water tank and the pressure regulating system are designed into a movable trolley form.
According to the movable cart form designed in the previous step, ball valves are arranged between the water treatment equipment and the water tank and between the water tank and the pressure regulating system cart and used for isolating water after the cart is detached.
The beneficial technical effects are as follows:
1. the test run time of the whole machine test is saved.
2. The bottom of the pre-adjusting device is provided with a water return pipeline which can be directly returned to the water tank, so that the water tank can be recycled, and waste is avoided.
3. Only 1.5s is consumed from the sending of the switching instruction to the specified flow, the switching time response is fast, and the test water consumption is accurately and quickly adjusted.
Drawings
FIG. 1 is a schematic diagram of a water swallowing device of an engine,
description of the drawings: 1-fast switching device, 2-presetting device.
Detailed Description
The fast and accurate switching device for the ground complete machine water swallowing test of a certain type of aero-engine is further described in detail below, wherein the device comprises water treatment equipment, a water tank, a pressure regulating system and a switching pre-regulating device;
tap water enters the water treatment equipment through the water supply valve to be purified and then enters the water tank, the upper part of the water tank is provided with an air release hole, the bottom of the water tank is provided with a waterproof valve, the side wall of the water tank is provided with a sampling water valve, and the side wall of the water tank is provided with a water tank return pipeline which is connected with the bottom of a water changing tank in the switching device;
the pressure regulating system comprises a variable frequency water pump, a pressure sensor, a temperature sensor, a filter and a flowmeter which are connected in sequence; a safety valve is arranged between the variable frequency water pump and the pressure sensor and is connected to the side wall of the water tank through a pipeline;
the switching pre-adjusting device comprises a switching valve, a water spraying ring and a water receiving tank; one path of the switching valve is connected with a water spraying ring in the air inlet channel, the other path of the switching valve is connected with a water spraying ring on the water receiving tank, and the shapes, the nozzle layouts and the arrangement heights of the two water spraying rings are consistent; a 120-degree fan-shaped partition plate is arranged at the bottom of the water receiving tank; two water drainage holes connected with a water return pipeline of the water tank are arranged at the bottom of the water receiving tank, one water drainage hole is arranged in the area of the fan-shaped partition plate, and the other water drainage hole is arranged outside the area of the fan-shaped partition plate.
Still include the accumulator, the accumulator sets up between temperature sensor and filter. Further buffering the pressure fluctuation of water, being beneficial to the accurate adjustment of the water spraying flow.
The frequency conversion water pump is a vertical multi-stage frequency conversion water pump, the pressure behind the pump is stable, the fluctuation is small, and the adjustment of the water spraying flow is facilitated.
Still include the air film governing valve, the air film governing valve sets up between filter and flowmeter, because last step frequency conversion water pump regulation precision is limited, and the regulating power is not enough, consequently increases the air film governing valve here to reach accurate governing pump back pressure.
The sampling water valve is 20CM away from the bottom of the water tank. If the setting position is too low, impurities may exist at the bottom of the water tank, so that the collected water quantity cannot accurately reflect the water quality of the whole tank of water.
The safety valve is connected to the side wall of the water tank at a distance of 30CM from the bottom through a pipeline. The height of the safety valve connecting pipeline is higher than that of the sampling water valve pipeline, so that the water quality at the safety valve is better than that at the sampling valve.
One of the water discharge holes is arranged at the sector center in the sector partition area, and the other water discharge hole is arranged at the central position outside the sector partition area, and the diameter of each water discharge hole is 30 mm. The fan-shaped area is set for carrying out statistical verification on the water volume in the area and meeting the requirements of relevant national military standards. The requirement is 50% of the total water volume that should be distributed in one third of the sector area.
The sector baffle height is 50 CM;
the water treatment equipment, the water tank and the pressure regulating system are designed into a movable cart form, and are divided into a water treatment equipment cart, a water tank cart and a pressure regulating system cart, and the position for placing the switching pre-regulating device is reserved on the pressure regulating system cart. The damage of the equipment to the site is reduced, and the site recovery after the test is convenient.
Ball valves are arranged between the water treatment equipment cart and the water tank cart and between the water tank cart and the pressure regulating system cart and used for isolating water after the two carts are detached.
Further explanation:
1. the device comprises an engine presetting device and a quick switching device.
2. Developing a set of presetting device: the device is shown as attached figure 1, a water spraying device in a pre-adjusting device is completely consistent with a water spraying device of an engine in the aspects of layout and nozzle type selection, and the flow resistance influence after flow switching is eliminated; the inner diameter of the pre-adjusting device is consistent with the inner diameter of an air inlet passage of the engine, and the bottom of the pre-installing device is provided with a partition plate with the area of 1/3, so that a certain verification effect on the water distribution of the air inlet section of the engine is achieved; the preset device and the water spraying device are placed on the same horizontal plane to eliminate the switched flow difference caused by the height difference; the bottom of the water spraying device is provided with a water return pipeline, so that the pre-adjusted water quantity is returned to the water tank for cyclic utilization, and waste is avoided.
3. Develop a set of fast shifter: the switching valve with quick response is adopted, after the flow regulation is finished on the pipeline of the pre-regulation device, the switching is carried out when the engine reaches a specific state, and in order to further reduce the flow stabilizing time after the switching, the distance from the switching valve to the water spraying device is shortened to be the shortest, so that the flow filling time is reduced. And a pressure measuring point is arranged at the nozzle of the water spraying device and used for detecting the pressure build-up time of the pipeline after the flow switching, so that the flow stabilization time of the engine is reflected, and the switched flow stabilization time is about 1.5s after debugging and optimization.
The working principle of the invention is as follows: by developing the pre-adjusting device and the quick adjusting device, the water quantity of the water sample swallowed by the whole engine can be quickly and accurately switched, and the test requirement can be met.
The working process of the invention is as follows:
after being purified by water treatment equipment, the factory tap water flows into a water tank for storage, and is sampled and checked by a sampling valve, so that the requirements of the national military standard on Ph, total solid content, dissolved solid content, water conductivity and the like are met; the pressure is increased by a vertical multi-stage variable frequency pump, and the pressure after the pump is adjusted by a safety valve connected in parallel with the water pump to protect the pump; measuring the water pressure and the water temperature after the pump by using a pressure sensor and a temperature sensor, weakening the pressure pulse of the water pressure after the pump by using a pressure accumulator, stabilizing the water pressure, accurately adjusting the water pressure by adjusting the opening of an air film adjusting valve, and then accurately measuring the water quantity by using a mass flowmeter; in the adjusting stage, water is led into a water spraying ring of the pre-adjusting device through a quick switching valve, the adjustment of water spraying flow is completed by adjusting the frequency of a water pump and the opening degree of an air film adjusting valve, after the engine reaches an appointed state, water is led into an air inlet channel through the switching valve, a whole engine water swallowing test in the state of the engine is carried out, after the appointed water swallowing time is reached, the water is led into the water spraying ring of the pre-adjusting device through the switching valve, the flow adjustment in the next state of the engine is carried out, and water in a water receiving groove of the pre-adjusting device returns to a water tank through a water return pipeline for cyclic. In addition, when the water distribution of the air inlet section of the engine needs to be verified, a hand valve at the bottom of the water receiving tank needs to be closed, water is sprayed for 1min to stop supplying water after the frequency of the water pump and the opening degree of the air film regulating valve reach the specified flow, and the water quantity of the 1/3 fan-shaped area and the 2/3 fan-shaped area is measured and verified.
Claims (10)
1. A switching device for an aircraft engine ground water swallowing test is characterized by comprising water treatment equipment, a water tank, a pressure regulating system and a switching pre-regulating device;
tap water enters the water treatment equipment through the water supply valve to be purified and then enters the water tank, the upper part of the water tank is provided with an air release hole, the bottom of the water tank is provided with a waterproof valve, the side wall of the water tank is provided with a sampling water valve, and the side wall of the water tank is provided with a water tank return pipeline which is connected with the bottom of a water changing tank in the switching device;
the pressure regulating system comprises a variable frequency water pump, a pressure sensor, a temperature sensor, a filter and a flowmeter which are connected in sequence; a safety valve is arranged between the variable frequency water pump and the pressure sensor and is connected to the side wall of the water tank through a pipeline;
the switching pre-adjusting device comprises a switching valve, a water spraying ring and a water receiving tank; one path of the switching valve is connected with a water spraying ring in the air inlet channel, the other path of the switching valve is connected with a water spraying ring on the water receiving tank, and the shapes, the nozzle layouts and the arrangement heights of the two water spraying rings are consistent; a 120-degree fan-shaped partition plate is arranged at the bottom of the water receiving tank; two water discharging holes connected with a water return pipeline of the water tank are arranged at the bottom of the water receiving tank, one water discharging hole is arranged in the area of the fan-shaped partition plate, and the other water discharging hole is arranged outside the area of the fan-shaped partition plate.
2. The switching device for the ground gulp test of the aircraft engine according to claim 1, further comprising a pressure accumulator, wherein the pressure accumulator is arranged between the temperature sensor and the filter.
3. The switching device for the ground water swallowing test of the aircraft engine according to claim 1, wherein the variable frequency water pump is a vertical multi-stage variable frequency water pump.
4. The switching device for the ground gulp test of the aircraft engine according to claim 1, characterized by further comprising an air film regulating valve, wherein the air film regulating valve is arranged between the filter and the flowmeter.
5. The switching device for the ground gulp test of the aeroengine according to claim 1, wherein, the height of the sampling water valve is 20CM from the bottom of the water tank.
6. The switching device for the ground gulp test of the aeroengine according to claim 1, wherein, the relief valve is connected to the side wall of the water tank through a pipeline and is 30CM away from the bottom.
7. The switching device for the ground gulp test of the aircraft engine as claimed in claim 1, wherein said water discharge holes are arranged one at the sector center of the sector partition area and one at the center of the sector partition area, and the diameter of said water discharge hole is 30 mm.
8. The switching device for the ground gulp test of the aeroengine according to claim 1, wherein the height of the fan-shaped partition is 50 CM.
9. The switching device for the ground gulp test of the aircraft engine according to claim 1, wherein the water treatment equipment, the water tank and the pressure regulating system are designed into a movable cart form.
10. The switching device for the ground gulp test of the aircraft engine according to claim 9, characterized in that ball valves are arranged between the water treatment equipment and the water tank and between the water tank and the pressure regulating system cart.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010922260.XA CN112033690A (en) | 2020-09-04 | 2020-09-04 | Switching device for ground water swallowing test of aero-engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010922260.XA CN112033690A (en) | 2020-09-04 | 2020-09-04 | Switching device for ground water swallowing test of aero-engine |
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| CN112033690A true CN112033690A (en) | 2020-12-04 |
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| CN202010922260.XA Pending CN112033690A (en) | 2020-09-04 | 2020-09-04 | Switching device for ground water swallowing test of aero-engine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112683537A (en) * | 2020-12-16 | 2021-04-20 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Water swallowing test equipment of combined power device |
| CN113565631A (en) * | 2021-08-17 | 2021-10-29 | 中国航发贵阳发动机设计研究所 | Aeroengine bleed air automatic control device |
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2020
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| CN113565631A (en) * | 2021-08-17 | 2021-10-29 | 中国航发贵阳发动机设计研究所 | Aeroengine bleed air automatic control device |
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