CN115111005B - A bleed air conversion device for adjusting the bleed air position of an aircraft engine - Google Patents
A bleed air conversion device for adjusting the bleed air position of an aircraft engineInfo
- Publication number
- CN115111005B CN115111005B CN202210793976.3A CN202210793976A CN115111005B CN 115111005 B CN115111005 B CN 115111005B CN 202210793976 A CN202210793976 A CN 202210793976A CN 115111005 B CN115111005 B CN 115111005B
- Authority
- CN
- China
- Prior art keywords
- air
- movable rod
- sealing body
- bleed air
- shell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/02—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type
- F01D11/04—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type using sealing fluid, e.g. steam
- F01D11/06—Control thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
一种用于航空发动机引气位置调节的引气转换装置，在壳体的左端面A设置有第一引气口，在右端面B设置有第二引气口，中部设置有出气口；第一引气口、第二引气口、以及出气口均连通至壳体的内腔；两块支撑肋板间隔设置在壳体的内腔中，活动杆可滑动地穿设在支撑肋板上，且活动杆的两端分别延伸至第一引气口、第二引气口位置处；还包括驱动机构，用于驱动活动杆左右滑动；第一封严体设置在第一引气口位置处，且固接在活动杆的端头上，用于跟随活动杆运动并对第一引气口进行封堵或打开；第二封样体设置在第二引气口位置处，且固接在活动杆的端头上，用于跟随活动杆运动并对第二引气口进行封堵或打开。
A bleed air conversion device for adjusting the bleed air position of an aircraft engine, comprising a first bleed air port provided on the left end face A of a shell, a second bleed air port provided on the right end face B, and an air outlet provided in the middle; the first bleed air port, the second bleed air port, and the air outlet are all connected to the inner cavity of the shell; two supporting ribs are spaced apart in the inner cavity of the shell, a movable rod is slidably passed through the supporting ribs, and both ends of the movable rod extend to the positions of the first bleed air port and the second bleed air port respectively; a driving mechanism is also included for driving the movable rod to slide left and right; a first sealing body is provided at the position of the first bleed air port and is fixedly connected to the end head of the movable rod, and is used to follow the movement of the movable rod and to seal or open the first bleed air port; a second sealing body is provided at the position of the second bleed air port and is fixedly connected to the end head of the movable rod, and is used to follow the movement of the movable rod and to seal or open the second bleed air port.
Description
Technical Field
The invention relates to the technical field of aero-engine air systems, in particular to a bleed air conversion device structure for adjusting bleed air positions of aero-engines.
Background
In an aeroengine, in order to ensure reliable and stable operation of an engine lubrication system, a seal cavity needs to be ensured to have enough stable pressure and proper temperature within a covered wire range. The engine is required to carry out oil lubrication and sealing from the rear bleed air of the 5 th-stage compressor to the engine oil lubrication pre-cavity in a high-altitude low-rotation speed state, and the engine is converted to carry out oil lubrication and sealing from the bleed air of the fan unloading cavity to the engine oil lubrication pre-cavity in a medium-altitude high-rotation speed state.
The existing partial air-entraining conversion device has single air-entraining function, and can only independently introduce the air flow after the 5 th-stage air compressor or independently introduce the air flow of a fan unloading cavity. The function of introducing the air flow after the 5 th-stage air compressor and the air flow of the fan unloading cavity cannot be met. In addition, the bleed air position of the existing aeroengine needs to be provided with a plurality of bleed air conversion devices so as to meet the bleed air requirement.
Disclosure of Invention
The invention mainly aims to provide a bleed air conversion device for adjusting bleed air positions of an aeroengine, and aims to solve the technical problems.
In order to achieve the above purpose, the invention provides a bleed air conversion device for adjusting bleed air position of an aeroengine, which comprises a shell, a movable rod, a first sealing body, a second sealing body and supporting rib plates;
The left end face A of the shell is provided with a first air vent, and the right end face B is provided with a second air vent; the first air inlet, the second air inlet and the air outlet are all communicated to the inner cavity of the shell;
the two support rib plates are arranged in the inner cavity of the shell at intervals, the movable rod is slidably arranged on the support rib plates in a penetrating mode, and two ends of the movable rod extend to the positions of the first air guiding port and the second air guiding port respectively;
The driving mechanism is used for driving the movable rod to slide left and right;
The first sealing body is arranged at the position of the first air-entraining port and fixedly connected to the end head of the movable rod, and is used for moving along with the movable rod and plugging or opening the first air-entraining port;
the second sealing body is arranged at the position of the second air entraining port and fixedly connected to the end head of the movable rod and used for moving along with the movable rod and plugging or opening the second air entraining port.
Preferably, the driving mechanism comprises a rotating shaft, a gear arranged on the rotating shaft and a tooth block arranged in the middle of the movable rod, one end of the transmission shaft penetrates out of the inner cavity of the shell and then is connected with the power source, the other end of the transmission shaft is rotatably connected to the inner wall of the shell, and the gear is meshed with the tooth block for transmission.
Preferably, the height of the tooth block is the same as that of the gear, and the height of the tooth block is larger than the diameter of the movable rod.
Preferably, the wall surfaces of the first air guiding opening and the second air guiding opening are concave hemispheres, the outer surfaces of the first sealing body and the second sealing body are hemispheres, and the hemispheres of the sealing bodies are matched with the hemispheres of the air guiding opening during sealing.
Preferably, the outer end surfaces of the first sealing body and the second sealing body are provided with inner concave semi-spheres, so that the first sealing body and the second sealing body form a bowl-shaped structure.
Preferably, the supporting rib plate is of a semicircular plate-shaped structure, and the cylindrical surface of the supporting rib plate is connected with the inner wall surface of the shell.
Preferably, the two end surfaces of the shell are square plate structures, and connecting holes are formed in four corners of the square plate.
Preferably, the shell is formed by welding square plates on two end surfaces and a cylinder body in the middle.
Preferably, a square boss is arranged on the outer wall surface of the shell middle barrel, the air outlet is arranged on the square boss, and connecting holes are formed in the four corners of the square boss.
Preferably, the square boss and the cylinder body in the middle of the shell are of an integrated structure.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
(1) According to the bleed air conversion device, the two bleed air ports are formed in the shell, the movable rod is driven to slide left and right through the driving mechanism, and the sealing body is driven to plug or open the bleed air ports, specifically, when an aircraft engine needs to convert bleed air positions, the bleed air conversion device effectively utilizes a simple mechanical structure, and can open the first bleed air port of the left end face A and simultaneously close the second bleed air port of the right end face B, or open the second bleed air port of the right end face B and simultaneously close the first bleed air port of the left end face A, or simultaneously open the first bleed air port and the second bleed air port. The function of introducing the air flow after the 5 th-stage air compressor and introducing the air flow of the fan unloading cavity is satisfied.
(2) The bleed air conversion device provided by the invention has the advantages of simple structure, stable function, strong sealing capability and low installation cost, and can meet the bleed air requirement by adopting one bleed air conversion device, effectively reduce the counterweight, and ensure that the required airflow is reliably and stably introduced without excessive additional change of the original bleed air conversion position, thereby realizing the reliable and stable operation of the engine lubrication system.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic perspective view of an air entraining conversion device according to the present invention;
FIG. 2 is a cross-sectional view of the bleed air converting apparatus provided by the present invention;
Fig. 3 is another cross-sectional view of the bleed air converting device provided by the invention.
The reference numerals comprise 1-a shell, 101-a first air inlet, 102-a second air inlet, 103-an air outlet, 104-a square boss, 2-a movable rod, 201-a tooth block, 301-a first sealing body, 302-a second sealing body, 4-a supporting rib plate, 5-a rotating shaft and 501-a gear.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear are used in the embodiments of the present invention) are merely for explaining the relative positional relationship, movement conditions, and the like between the components in a certain specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicators are changed accordingly.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
Referring to fig. 1 to 3, a specific implementation structure of a bleed air conversion device for adjusting bleed air position of an aeroengine provided by the invention includes a housing 1, a movable rod 2, a first sealing body 301, a second sealing body 302, and a supporting rib plate 4;
The air inlet device comprises a shell 1, an air outlet 103, a first air inlet 101, a second air inlet 102 and an air outlet 103, wherein the left end face A of the shell 1 is provided with the first air inlet 101, the right end face B is provided with the second air inlet 102;
The two support rib plates 4 are arranged in the inner cavity of the shell 1 at intervals, the movable rod 2 is slidably arranged on the support rib plates 4 in a penetrating mode, and two ends of the movable rod 2 extend to the positions of the first air guiding port 101 and the second air guiding port 102 respectively;
The first sealing body 301 is arranged at the position of the first air inlet 101, is fixedly connected to the end head of the movable rod 2, and is used for moving along with the movable rod 2 and plugging or opening the first air inlet 101;
The second sealing body 302 is disposed at the position of the second air guiding opening 102, and is fixedly connected to the end of the movable rod 2, and is used for following the movement of the movable rod 2 and sealing or opening the second air guiding opening 102.
Referring to fig. 2, the bleed air converting device provided by the invention has the following three conditions:
The first condition is that the movable rod 2 is driven to move towards the right end face B through the driving device, at the moment, the first sealing body 301 at the left end face A seals the first air inlet 101, the second sealing body 302 at the right end face B opens the second air inlet 102, and the second air inlet 102 is used for introducing air flow after the 5 th-stage air compressor to the engine lubricating oil front cavity for lubricating oil sealing.
The second condition is that the movable rod 2 is driven to move towards the left end face A through the driving device, at the moment, the second sealing body 302 at the right end face B seals the second air outlet 102, the first sealing body 301 at the left end face A opens the first air outlet 101, and the first air outlet 101 is used for introducing air flow of the fan unloading cavity to the engine lubricating oil front cavity for lubricating oil sealing.
The third condition is that when the movable rod 2 is at the middle position, the first air inlet 101 and the second air inlet 102 are both in an open state, and the air flow after the 5 th-stage air compressor and the air flow of the fan unloading cavity are introduced into the engine lubricating oil front cavity for lubricating oil sealing.
The bleed air conversion device provided by the invention can be used for not only introducing the air flow after the 5 th-stage air compressor, but also introducing the air flow of the fan unloading cavity.
Referring to fig. 2 and3, the driving mechanism includes a rotation shaft 5, a gear 501 disposed on the rotation shaft 5, and a tooth block 201 disposed in the middle of the movable rod 2, one end of the transmission shaft 5 penetrates through the inner cavity of the housing 1 and then is connected with a power source, the other end is rotatably connected to the inner wall of the housing 1, the power source may be a motor, etc., and the gear 501 is meshed with the tooth block 201 for transmission. The gear 501 and the gear block 201 are meshed for transmission, so that the transmission structure is simple, and meanwhile, the opening degrees of the first sealing body 301 and the second sealing body 302 can be controlled by controlling the rotation angle of the transmission shaft 5.
As shown in connection with fig. 2, the tooth block 201 has the same height as the gear 501. The contact length between the tooth block 201 and the gear 501 can be increased by adopting the same height setting, so that the meshing stability is ensured, and meanwhile, the height of the tooth block 201 is larger than the diameter of the movable rod 2, so that the contact distance between the tooth block 201 and the gear 501 in the longitudinal direction is increased, and the movable rod 2 can be well prevented from rotating around the axis of the movable rod.
As shown in fig. 2, the wall surfaces of the first air guiding port 101 and the second air guiding port 102 are concave semi-spheres, the outer surfaces of the first sealing body 301 and the second sealing body 302 are semi-spheres, and the semi-spheres of the sealing bodies are matched with the semi-spheres of the air guiding ports during sealing. When the plugging is carried out, a spherical surface matched mode is adopted, so that a better sealing effect can be achieved.
Further, inner concave hemispherical surfaces are disposed on the outer end surfaces of the first sealing body 301 and the second sealing body 302, so that the first sealing body 301 and the second sealing body 302 form a bowl-shaped structure. The concave hemispherical surfaces on the end surfaces of the first sealing body 301 and the second sealing body 302 form a wind-blocking structure, air flows at the left end surface A and the right end surface B can act on the wind-blocking structure, and when the first sealing body 301 and the second sealing body 302 are sealed, acting force formed by the air flows on the wind-blocking structure can push the sealing body to abut against the spherical surface of the air guiding opening, so that the sealing effect of the air guiding opening is ensured.
Referring to fig. 2 and 3, the supporting rib plate 4 has a semicircular plate structure, and the cylindrical surface of the supporting rib plate 4 is connected with the inner wall surface of the housing 1. The semicircular supporting rib plates 4 are adopted, so that a sliding supporting effect can be achieved on the movable rod 2, and the arc edge can be matched with the inner wall surface of the shell 1.
As shown in fig. 1, two end surfaces of the housing 1 are square plate structures, and connecting holes are formed at four corners of the square plate. The shell 1 is formed by welding square plates on two end surfaces and a cylinder body in the middle, and a welding structure is adopted, so that the sealing performance of a welding joint is guaranteed. The two end faces of the shell 1 are square plate structures and are provided with connecting holes, so that the installation of the whole air entraining conversion device is facilitated. Further, a square boss 104 is arranged on the outer wall surface of the middle cylinder body of the shell 1, the air outlet 103 is arranged on the square boss 104, connecting holes are formed in four corners of the square boss 104, and the square boss 104 is arranged to be convenient to connect with corresponding parts on an aeroengine. The square boss 104 and the barrel in the middle of the shell 1 are of an integrated structure, and are manufactured by adopting integrated molding, so that the structure is simple.
When the bleed air conversion device provided by the invention is used, the working principle is as follows:
When the aircraft engine is in a high-altitude low-rotation-speed state, the gear 501 and the gear block 201 are meshed to drive the movable rod 2 to move towards the right end face B, at the moment, the first sealing body 301 at the left end face A seals the first air inlet 101, the second sealing body 302 at the right end face B opens the second air inlet 102, and the second air inlet 102 introduces air flow after the 5 th-stage air compressor to the engine lubricating oil pre-cavity for lubricating oil sealing.
When the aircraft is in a medium-low high-speed state, the air-entraining conversion device carries out air-entraining conversion, the gear 501 and the tooth block 201 are meshed to drive the movable rod 2 to move towards the left end face A, at the moment, the second sealing body 302 at the right end face B seals the second air-entraining port 102, the first sealing body 301 at the left end face A opens the first air-entraining port 101, and the first air-entraining port 101 introduces air flow of the fan unloading cavity to the engine lubricating oil front cavity to carry out lubricating oil sealing.
When the movable rod 2 is in the middle position in some special states of the engine, the first air bleed port 101 and the second air bleed port 102 can be allowed to bleed air simultaneously, and air flow after the 5 th-stage compressor and air flow of the fan unloading cavity are led into the engine lubricating oil front cavity for lubricating oil sealing.
Therefore, the cavity temperature and the cavity pressure of the engine lubricating oil front cavity can be kept in a reliable and stable state, and the reliable and stable operation of the engine lubricating system is maintained.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather, the equivalent structural changes made by the description of the present invention and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (5)
1. The bleed air conversion device for adjusting the bleed air position of the aeroengine is characterized by comprising a shell (1), a movable rod (2), a first sealing body (301), a second sealing body (302) and a supporting rib plate (4);
the air inlet device comprises a shell (1), a first air inlet (101) arranged on the left end face A of the shell (1), a second air inlet (102) arranged on the right end face B, an air outlet (103) arranged in the middle of the shell (1), and an inner cavity communicated with the first air inlet (101), the second air inlet (102) and the air outlet (103);
The two support rib plates (4) are arranged in the inner cavity of the shell (1) at intervals, the support rib plates (4) are of semicircular plate-shaped structures, the cylindrical surface of each support rib plate (4) is connected with the inner wall surface of the shell (1), the movable rod (2) is slidably arranged on the support rib plates (4) in a penetrating mode, and two ends of the movable rod (2) extend to the positions of the first air inlet (101) and the second air inlet (102) respectively;
The movable rod (2) is driven to slide left and right, the driving mechanism comprises a rotating shaft (5), a gear (501) arranged on the rotating shaft (5) and a tooth block (201) arranged in the middle of the movable rod (2), the height of the tooth block (201) is the same as that of the gear (501), the height of the tooth block (201) is larger than the diameter of the movable rod (2), one end of the rotating shaft (5) penetrates out of an inner cavity of the shell (1) and then is connected with a power source, the other end of the rotating shaft is rotatably connected to the inner wall of the shell (1), the gear (501) is meshed with the tooth block (201) for transmission, and the opening degree of the first sealing body (301) and the second sealing body (302) is controlled by controlling the rotation angle of the transmission shaft (5);
The first sealing body (301) is arranged at the position of the first air inlet (101) and fixedly connected to the end head of the movable rod (2) and is used for moving along with the movable rod (2) and plugging or opening the first air inlet (101);
The second sealing body (302) is arranged at the position of the second air inlet (102) and fixedly connected to the end head of the movable rod (2) and is used for moving along with the movable rod (2) and plugging or opening the second air inlet (102);
The wall surfaces of the first air guiding opening (101) and the second air guiding opening (102) are concave hemispheres, the outer surfaces of the first sealing body (301) and the second sealing body (302) are hemispheres, and when the air guiding opening is sealed, the hemispheres of the sealing bodies are matched with the hemispheres of the air guiding opening;
The movable rod (2) is driven to move towards the right end face B through the driving device, at the moment, a first sealing body (301) at the left end face A seals the first air outlet (101), a second sealing body (302) at the right end face B opens the second air outlet (102), and the second air outlet (102) is used for introducing air flow after the 5 th-stage air compressor to an engine lubricating oil front cavity for lubricating oil sealing;
The movable rod (2) is driven to move towards the left end face A through the driving device, at the moment, the second sealing body (302) at the right end face B seals the second air outlet (102), the first sealing body (301) at the left end face A opens the first air outlet (101), and the first air outlet (101) is used for introducing air flow of the fan unloading cavity to the engine lubricating oil front cavity for lubricating oil sealing;
When the movable rod (2) is positioned at the middle position, the first air outlet (101) and the second air outlet (102) are both in an open state, and simultaneously, air flow after the 5 th-stage air compressor and air flow of the fan unloading cavity are introduced into the engine lubricating oil front cavity for lubricating oil sealing.
2. Bleed air conversion device for the regulation of the bleed air position of an aircraft engine according to claim 1, characterized in that the two end faces of the housing (1) are of square plate structure, the four corners of which are provided with connecting holes.
3. Bleed air conversion device for the regulation of the bleed air position of an aircraft engine according to claim 2, characterized in that the housing (1) is welded from square plates on both end faces with a central cylinder.
4.A bleed air converting device for use in aircraft engine bleed air position adjustment according to claim 3, characterised in that a square boss (104) is provided on the outer wall surface of the central barrel of the housing (1), the air outlet (103) being provided on the square boss (104), and in that connecting holes are provided at the four corners of the square boss (104).
5. Bleed air conversion device for the regulation of the bleed air position of an aircraft engine according to claim 4, characterized in that the square boss (104) is of integral construction with the barrel in the middle of the housing (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210793976.3A CN115111005B (en) | 2022-07-05 | 2022-07-05 | A bleed air conversion device for adjusting the bleed air position of an aircraft engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210793976.3A CN115111005B (en) | 2022-07-05 | 2022-07-05 | A bleed air conversion device for adjusting the bleed air position of an aircraft engine |
Publications (2)
| Publication Number | Publication Date |
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| CN115111005A CN115111005A (en) | 2022-09-27 |
| CN115111005B true CN115111005B (en) | 2025-10-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210793976.3A Active CN115111005B (en) | 2022-07-05 | 2022-07-05 | A bleed air conversion device for adjusting the bleed air position of an aircraft engine |
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| CN (1) | CN115111005B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007303659A (en) * | 2006-05-15 | 2007-11-22 | Okayama Univ | Micro electromagnetic valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3795584B2 (en) * | 1996-07-15 | 2006-07-12 | トーステ株式会社 | Double seal valve |
| JP5845640B2 (en) * | 2011-06-03 | 2016-01-20 | いすゞ自動車株式会社 | Flow path switching valve and internal combustion engine provided with the same |
| CN103629391B (en) * | 2013-11-29 | 2015-10-28 | 四川港通医疗设备集团股份有限公司 | A kind of automatic switchover medical gas cylinder manifold device and gas COMM communication |
| CN203670008U (en) * | 2013-12-12 | 2014-06-25 | 中航商用航空发动机有限责任公司 | Gas guiding device for gas compressor of aero-engine and gas compressor of aero-engine |
| JP2015175485A (en) * | 2014-03-17 | 2015-10-05 | 三菱重工業株式会社 | Selector valve |
| CN204187043U (en) * | 2014-10-09 | 2015-03-04 | 平原机器厂（新乡） | The pneumatic actuating device of automatic diverter valve and locking cylinder and this selector valve of use |
| US20180073431A1 (en) * | 2016-09-12 | 2018-03-15 | Hamilton Sundstrand Corporation | Stepped high-pressure bleed control system |
| CN111059319B (en) * | 2018-10-17 | 2024-05-14 | 广东美芝精密制造有限公司 | Three-way valve, compressor assembly, refrigerating device and control method of refrigerating device |
| CN209129687U (en) * | 2018-12-12 | 2019-07-19 | 中国航发沈阳发动机研究所 | The seal structure of double bleeds |
| CN112576377B (en) * | 2020-12-07 | 2022-04-01 | 中国航发沈阳发动机研究所 | Aeroengine bearing seals bleed structure |
| 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 |
| CN114060118B (en) * | 2021-10-20 | 2022-09-23 | 中国航发四川燃气涡轮研究院 | Bleed air conversion device |
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2022
- 2022-07-05 CN CN202210793976.3A patent/CN115111005B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007303659A (en) * | 2006-05-15 | 2007-11-22 | Okayama Univ | Micro electromagnetic valve |
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