CN114060118B - Bleed air conversion device - Google Patents
Bleed air conversion device Download PDFInfo
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- CN114060118B CN114060118B CN202111223562.9A CN202111223562A CN114060118B CN 114060118 B CN114060118 B CN 114060118B CN 202111223562 A CN202111223562 A CN 202111223562A CN 114060118 B CN114060118 B CN 114060118B
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- guide
- air
- conversion device
- shell
- sealing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/06—Valve members or valve-seats with means for guiding or deflecting the medium controlled thereby, e.g. producing a rotary motion of the drawn-in cylinder charge
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/08—Valves guides; Sealing of valve stem, e.g. sealing by lubricant
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lift Valve (AREA)
Abstract
The invention provides an air-entraining conversion device which comprises a cylindrical shell, wherein a first air inlet is formed in the front end of the shell, a second air inlet and an air outlet are formed in the side wall of the shell, the air-entraining conversion device also comprises a guide device, the guide device comprises a guide rod, a guide rake is arranged at the front end of the guide rod, the guide rake comprises a circular connecting part matched with the inner wall of the shell, the edges of the two side surfaces of the connecting part respectively extend outwards to form a section of annular side wall, a valve part and a sealing part with U-shaped sections are formed, a valve core is arranged in the middle of the guide rod and used for sealing the rear end of the shell, and the rear end of the guide rod is connected with a power source and used for providing power for the guide device so that the guide rod drives the guide rake to move at the first air inlet in a matched manner. The bleed air conversion device can effectively solve the technical problems of poor environmental adaptability, low temperature resistance level and poor reliability of the existing bleed air conversion device.
Description
Technical Field
The disclosure relates to the technical field of aero-engines, in particular to a bleed air conversion device.
Background
Aiming at the characteristics of wide flight envelope range, higher air entraining pressure and temperature in a large state, lower air entraining pressure in a small state and the like of an engine, the problem that the sealing overpressure (accelerated wear of a sealing part) of a bearing cavity or the insufficient sealing capability (leakage of lubricating oil) of the bearing cavity is inevitably caused by air entraining and sealing each fulcrum bearing cavity from a single position of the engine is solved by the following steps: and the switching of air entraining among different states is realized. The bleed air conversion device is used as a key important component for realizing the bleed air switching of the wide-envelope engine, and has the main functions of selectively leading low-pressure-level or high-pressure-level sealing air of an engine compression component to each bearing sealing cavity according to the real-time working state of the engine, so that each bearing obtains a good working environment in the full envelope range of the engine, sealing and heat insulation of each fulcrum bearing cavity are realized, and the service life of the bearing is prolonged.
At present, the air-entraining conversion device mainly comprises two types: differential pressure and electrical control. The differential pressure type bleed air conversion device is arranged outside the engine, realizes the switching function by utilizing the pressure difference between the inlet pressure of the conversion valve and the environmental pressure, depends on the pressure difference between the inlet pressure of the valve and the environmental pressure and has poor environmental adaptability. The main valve and the electromagnetic valve of the electric control type air entraining conversion device are designed integrally, the pressure of the piston cavity is controlled by the electromagnetic valve, and the piston drives the valve to realize the functional requirement of the product, but the electric control type air entraining conversion device has the problems that the electromagnetic valve has low temperature resistance level, is easy to block, the pressure in the piston cavity is easy to be influenced by the sealing leakage gas of the main valve, has poor reliability and the like.
Disclosure of Invention
In view of this, the embodiment of the present disclosure provides a bleed air conversion device, which has solved the technical problems of poor environmental adaptability, low temperature resistance level, and poor reliability of the existing bleed air conversion device.
In order to achieve the above purpose, the invention provides the following technical scheme:
a bleed air conversion device comprises a cylindrical shell, wherein a first air inlet hole is formed in the front end of the shell, a second air inlet hole and an air outlet hole are formed in the side wall of the shell, a guide device is further arranged in the shell and comprises a guide rod, a guide rake is arranged at the front end of the guide rod and comprises a circular connecting portion matched with the inner wall of the shell, the edges of the two side surfaces of the connecting portion respectively extend outwards to form a section of annular side wall, a valve portion and a sealing portion are formed, the sections of the annular side walls of the valve portion are U-shaped in cross section, a valve core is arranged in the middle of the guide rod and used for sealing the rear end of the shell, and the rear end of the guide rod is connected with a power source and used for providing power for the guide device so that the guide rod drives the guide rake to move in a matching mode at the first air inlet hole; when the rear end of the guide rod is powered to the inside of the shell, the valve part of the guide rake seals the first air inlet hole, so that the second air inlet hole and the air outlet hole form an airflow passage.
Furthermore, the guide harrow further comprises a valve seat, wherein the valve seat is fixed on the first air inlet hole, and the side wall of the valve part of the guide harrow is attached to the inner wall of the valve seat and can move along the inner wall of the valve seat.
Further, the surface diameter of the connecting part on one side of the valve part is smaller than that of the connecting part on one side of the sealing part, so that the circumferential side wall of the connecting part forms a conical sealing surface; when the rear end of the guide rod is subjected to power towards the inside of the shell, the conical sealing surface is abutted with the edge of the inner ring on one side of the valve seat to form linear sealing, and the guide rake is limited.
The guide rake is characterized by further comprising a sealing sleeve, the sealing sleeve is in interference fit with the inner wall of the shell and is located between the second air inlet hole and the air outlet hole, the sealing surface of the sealing sleeve is an arc-shaped sealing surface, and when the rear end of the guide rod is powered outside the shell, the arc-shaped sealing surface is abutted to the opening edge of the sealing part of the guide rake to form line sealing and limit the guide rake.
The valve core is fixed at the rear end of the shell, the section of the valve core is U-shaped, the side wall of the valve core is attached to the inner wall of the lining, and the valve core moves along the inner wall of the lining along with the pushing of the guide rod.
Further, still include the gland, the rear end of casing sets up the internal thread, set up the external screw thread on the gland, the gland with the rear end threaded connection of casing.
Further, still include sealed the pad, the bush with between the casing, the bush with between the gland, and the gland with all be equipped with between the casing sealed the pad.
Furthermore, the guide rod comprises a top rod at the front section and a connecting shaft at the rear section, one end of the top rod is connected with the guide rake, the other end of the top rod is connected with the valve core, one end of the connecting shaft is connected with the valve core, and the other end of the connecting shaft is provided with a flange edge.
Furthermore, one end of the ejector rod is in threaded connection with the middle of the sealing part of the guide rake, a boss is arranged at the other end of the ejector rod, and a T-shaped groove used for installing the boss at the end part of the ejector rod is arranged at the U-shaped bottom of the valve core, so that the guide rake is fixedly connected with the valve core through the ejector rod.
Furthermore, a rib plate is further arranged inside the valve core, one end of the connecting shaft is fixedly connected with the rib plate, and a flange at the other end of the connecting shaft is matched with a power source.
The bleed air conversion device has the advantages of short processing period, simple process, convenient material selection and good sealing effect, and overcomes the defects of poor environmental adaptability, low temperature resistance level and poor reliability of the existing bleed air conversion device.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required to be used in the embodiments will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a cross-sectional view of a bleed air conversion device provided by the present invention;
FIG. 2 is a schematic view of the assembly of the valve, the ejector rod and the valve core provided by the invention;
FIG. 3 is a cross-sectional view of a line seal formed by the shutter and the tapered seal provided by the present invention;
FIG. 4 is a cross-sectional view of the valve of the present invention forming a line seal with an arc seal;
figure 5 is an assembled cross-sectional view of the housing, liner and gland assembly provided by the present invention.
Detailed Description
The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
The embodiments of the present disclosure are described below with specific examples, and other advantages and effects of the present disclosure will be readily apparent to those skilled in the art from the disclosure in the specification. It is to be understood that the described embodiments are merely illustrative of some, and not restrictive, of the embodiments of the disclosure. The disclosure may be embodied or carried out in various other specific embodiments, and various modifications and changes may be made in the details within the description without departing from the spirit of the disclosure. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
It is noted that various aspects of the embodiments are described below within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the disclosure, one skilled in the art should appreciate that one aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. In addition, such an apparatus may be implemented and/or such a method may be practiced using other structure and/or functionality in addition to or other than one or more of the aspects set forth herein.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present disclosure, and the drawings only show the components related to the present disclosure rather than the number, shape and size of the components in actual implementation, and the type, amount and ratio of the components in actual implementation may be changed arbitrarily, and the layout of the components may be more complicated.
In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects may be practiced without these specific details.
The embodiment of the disclosure provides an air-entraining device, which comprises a valve seat 1, a guide rake 2, a shell 3, a sealing sleeve 4, a mandril 5, a valve core 6, a lining 7, an A-shaped sealing gasket 8, a B-shaped sealing gasket 9, a C-shaped sealing gasket 10, a gland 11, a rib plate 12 and a connecting shaft 13; wherein: a conical sealing surface 14 is arranged on the middle connecting part of the guide harrow 2, a valve part 20 and a sealing part 21 are respectively arranged at the two sides of the connecting part, and an internal threaded hole is arranged at the center position of the right side; the shell 3 is provided with a first air inlet hole 16, an air outlet hole 19, a second air inlet hole 17 and a channel 18, and the right side end of the shell 3 is provided with an internal thread; the gland 11 is provided with external threads; the shell 3 is connected with the gland 11 by screw thread; the left end face of the sealing sleeve 4 is provided with an arc-shaped sealing face 15; a flange edge is arranged on the right side of the connecting shaft 13; a boss is arranged at the right end side of the ejector rod 5, and an external thread is arranged at the left end of the ejector rod; the left end face of the valve core 6 is provided with a boss, and the boss is provided with a T-shaped mounting groove for connecting the ejector rod 5.
The invention has short processing period, simple process and convenient material selection. The shell 3 and the gland 11 are connected by screw threads, and the air-entraining conversion structure is convenient to disassemble and maintain; the valve seat 1, the guide rake 2, the shell 3, the sealing sleeve 4, the ejector rod 5, the valve core 6, the bush 7, the A-shaped sealing gasket 8, the B-shaped sealing gasket 9, the C-shaped sealing gasket 10, the gland 11, the rib plate 12 and the connecting shaft 13 can be processed by adopting high-temperature resistant materials; the guide rake 2, the ejector rod 5, the valve core 6, the rib plate 12 and the connecting shaft 13 form a valve core assembly, the adaptive servo motor or the servo hydraulic actuating device is connected with the flange edge on the right side of the connecting shaft 13 to drive the valve core assembly to move left and right, the influence of sealing leakage between the main valve housing 3 and the lining 7 on the stress of the valve core assembly is eliminated, and the temperature resistance level, the response speed and the reliability of the air bleeding conversion structure are effectively improved. The valve seat 1 and the conical sealing surface 14 form linear sealing, and the right end surface of the guide rake 2 and the arc sealing surface 15 form linear sealing, so that the sealing effect of the air-entraining conversion structure is effectively improved.
As shown in fig. 1 to 5, the components such as the molded valve seat 1, the guide rake 2, the housing 3, the sealing sleeve 4, the ejector rod 5, the valve core 6, the bush 7, the a-shaped sealing gasket 8, the B-shaped sealing gasket 9, the C-shaped sealing gasket 10, the gland 11, the rib plate 12, the connecting shaft 13 and the like are manufactured by machining. The valve core 6, the rib plate 12 and the connecting shaft 13 are welded into a whole; the valve core 6 and the bush 7 adopt a precise surface matching assembly process; the seal sleeve 4 and the shell 3 adopt an interference assembly process; the assembly process of the shell 3 and the A-shaped sealing gasket 8, the bushing 7, the B-shaped sealing gasket 9, the C-shaped sealing gasket 10 and the gland 11 is completed in sequence, the side-protruding platform at the right end of the ejector rod 5 is placed in the T-shaped mounting groove in the valve core 6, then the assembly of the valve seat 1 and the guide rake 2, the assembly of the valve seat 1 and the shell 3 are completed in sequence, the ejector rod 5 and the guide rake 2 are connected into a whole through threads, and after the assembly process is completed, the valve seat 1 and the shell 3 are welded into a whole to form the air-entraining conversion structure shown in the figure 1. The working principle of the bleed air conversion structure shown in fig. 1 is as follows: the guide harrow 2, the ejector rod 5, the valve core 6, the rib plate 12 and the connecting shaft 13 form a valve core assembly, and the adaptive servo motor or the servo hydraulic actuating device is connected with the flange side at the right side of the connecting shaft 13; when an instruction is input to enable the servo motor or the servo hydraulic actuating device to drive the valve plug assembly to move rightwards, the right end face of the guide harrow 2 and the arc-shaped sealing face 15 form linear sealing, an air flow channel formed by the second air inlet hole 17, the channel 18 and the air outlet hole 19 is closed, and an air flow channel formed by the second air inlet hole 17 and the air outlet hole 19 is opened; when an instruction is input to enable the valve plug assembly driven by the servo motor or the servo hydraulic actuating device to move leftwards, the valve seat 1 and the conical sealing surface 14 on the left side of the guide harrow 2 form linear sealing, an air flow channel formed by the first air inlet hole 16-the air outlet hole 19 is closed, and an air flow channel formed by the second air inlet hole 17-the channel 18-the air outlet hole 19 is opened, so that the air entraining conversion function is realized.
The above description is only for the specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present disclosure should be covered within the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.
Claims (10)
1. An air-entraining conversion device comprises a cylindrical shell, a first air inlet is arranged at the front end of the shell, a second air inlet and an air outlet are arranged on the side wall of the shell, it is characterized in that the shell also comprises a guiding device which comprises a guiding rod, the front end of the guide rod is provided with a guide harrow, the guide harrow comprises a circular connecting part matched with the inner wall of the shell, the edges of the two side surfaces of the connecting part respectively extend outwards to form a section of annular side wall to form a valve part and a sealing part with U-shaped sections, the annular side wall of the valve part is hollowed, the middle part of the guide rod is provided with a valve core, the rear end of the guide rod is connected with a power source and used for providing power for the guide device, so that the guide rod drives the guide rake to move in a matching manner at the first air inlet; when the rear end of the guide rod is powered to the inside of the shell, the valve part of the guide rake seals the first air inlet hole, so that the second air inlet hole and the air outlet hole form an airflow passage.
2. The bleed air conversion device according to claim 1, further comprising a valve seat fixed to the first air inlet hole, wherein the side wall of the valve portion of the guide rake is attached to and movable along the inner wall of the valve seat.
3. The bleed air conversion arrangement according to claim 2, characterised in that the surface diameter of the connection portion on the flap portion side is smaller than the surface diameter of the connection portion on the sealing portion side, such that the circumferential side walls of the connection portions form a conical sealing surface; when the rear end of the guide rod is subjected to power towards the inside of the shell, the conical sealing surface is abutted with the edge of the inner ring on one side of the valve seat to form linear sealing, and the guide rake is limited.
4. The air-entraining conversion device according to any one of claims 1 to 3, further comprising a sealing sleeve, wherein the sealing sleeve is in interference fit with the inner wall of the housing and is located between the second air inlet hole and the air outlet hole, and a sealing surface of the sealing sleeve is an arc-shaped sealing surface, and when the rear end of the guide rod is subjected to power towards the outside of the housing, the arc-shaped sealing surface abuts against the opening edge of the sealing part of the guide rake to form a linear seal and limit the guide rake.
5. The bleed air conversion device according to claim 4 further comprising a bush fixed to the rear end of the housing, the spool having a U-shaped cross-section with side walls engaging the inner wall of the bush, the spool moving along the inner wall of the bush as the guide bar pushes.
6. The bleed air conversion device of claim 5, further comprising a gland, wherein the rear end of the housing is internally threaded and the gland is externally threaded, the gland being threadedly connected to the rear end of the housing.
7. The bleed air conversion device of claim 6, further comprising a seal, the seal being disposed between the liner and the housing, between the liner and the gland, and between the gland and the housing.
8. The air entraining conversion device according to claim 7, characterized in that the guide rod comprises a top rod at the front section and a connecting shaft at the rear section, one end of the top rod is connected with the guide rake, the other end of the top rod is connected with the valve core, one end of the connecting shaft is connected with the valve core, and the other end of the connecting shaft is provided with a flange.
9. The bleed air conversion device according to claim 8, wherein one end of the ejector rod is in threaded connection with the interior of the sealing portion of the guide rake, a boss is arranged at the other end of the ejector rod, and a T-shaped groove for mounting the boss at the end of the ejector rod is arranged at the U-shaped bottom of the valve core, so that the guide rake is fixedly connected with the valve core through the ejector rod.
10. The air entraining conversion device according to claim 8, characterized in that a rib plate is arranged in the valve core, one end of the connecting shaft is fixedly connected with the rib plate, and a flange edge at the other end of the connecting shaft is matched with the power source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111223562.9A CN114060118B (en) | 2021-10-20 | 2021-10-20 | Bleed air conversion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111223562.9A CN114060118B (en) | 2021-10-20 | 2021-10-20 | Bleed air conversion device |
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| Publication Number | Publication Date |
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| CN114060118A CN114060118A (en) | 2022-02-18 |
| CN114060118B true CN114060118B (en) | 2022-09-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111223562.9A Active CN114060118B (en) | 2021-10-20 | 2021-10-20 | Bleed air conversion device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109642499A (en) * | 2016-08-23 | 2019-04-16 | 通用电气航空系统有限责任公司 | The Enhancement Method and aircraft of environmental control system are precooled using the two-wheel turbine with supplement heat exchanger |
| CN110294131A (en) * | 2018-03-21 | 2019-10-01 | 哈米尔顿森德斯特兰德公司 | Synthesis low pressure bleed scheme for aircraft bleed network |
| CN112197018A (en) * | 2020-09-18 | 2021-01-08 | 中国航发沈阳发动机研究所 | Valve for self-adaptively adjusting ventilation mode of aero-engine |
| CN112576377A (en) * | 2020-12-07 | 2021-03-30 | 中国航发沈阳发动机研究所 | Aeroengine bearing seals bleed structure |
| CN113107682A (en) * | 2021-04-27 | 2021-07-13 | 中国航发沈阳发动机研究所 | Low-resistance air pressure altitude valve for aero-engine lubricating oil system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9004849B2 (en) * | 2012-01-10 | 2015-04-14 | United Technologies Corporation | Gas turbine engine forward bearing compartment architecture |
-
2021
- 2021-10-20 CN CN202111223562.9A patent/CN114060118B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109642499A (en) * | 2016-08-23 | 2019-04-16 | 通用电气航空系统有限责任公司 | The Enhancement Method and aircraft of environmental control system are precooled using the two-wheel turbine with supplement heat exchanger |
| CN110294131A (en) * | 2018-03-21 | 2019-10-01 | 哈米尔顿森德斯特兰德公司 | Synthesis low pressure bleed scheme for aircraft bleed network |
| CN112197018A (en) * | 2020-09-18 | 2021-01-08 | 中国航发沈阳发动机研究所 | Valve for self-adaptively adjusting ventilation mode of aero-engine |
| CN112576377A (en) * | 2020-12-07 | 2021-03-30 | 中国航发沈阳发动机研究所 | Aeroengine bearing seals bleed structure |
| CN113107682A (en) * | 2021-04-27 | 2021-07-13 | 中国航发沈阳发动机研究所 | Low-resistance air pressure altitude valve for aero-engine lubricating oil system |
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| CN114060118A (en) | 2022-02-18 |
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