CN117514475A - Linear guide and antifriction transmission mechanism in variable cycle engine mode switching valve - Google Patents
Linear guide and antifriction transmission mechanism in variable cycle engine mode switching valve Download PDFInfo
- Publication number
- CN117514475A CN117514475A CN202311771153.1A CN202311771153A CN117514475A CN 117514475 A CN117514475 A CN 117514475A CN 202311771153 A CN202311771153 A CN 202311771153A CN 117514475 A CN117514475 A CN 117514475A
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- Prior art keywords
- antifriction
- switching valve
- mode switching
- transmission mechanism
- transmission shaft
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 102
- 230000007246 mechanism Effects 0.000 title claims abstract description 60
- 238000005096 rolling process Methods 0.000 claims description 15
- 230000007704 transition Effects 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 7
- 238000005299 abrasion Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 239000000306 component Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Classifications
-
- 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
- F02C9/00—Controlling gas-turbine plants; Controlling fuel supply in air- breathing jet-propulsion plants
-
- 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)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses a linear guide and antifriction transmission mechanism in a variable cycle engine mode switching valve, which is used for changing the working state of an engine to adapt to different flight conditions, and belongs to the technical field of high-performance gas turbine engines in aerospace technology; the transmission mechanism is positioned at the inlet of the engine mode switching valve and comprises a retainer, a hydraulic actuator cylinder, a steering shaft, a transmission shaft, a linear bearing, an actuating ring and an actuating window; the invention cooperates with the mode selection valve in the variable cycle engine adjustable mechanism to realize the conversion between the two modes of opening and closing of the valve, so that the engine has optimal performance in a wider working range. Through the guiding function of the linear bearing, the friction and abrasion generated in the working process of the transmission mechanism can be reduced, and the working stability and reliability of the active control mode switching valve in the engine adjustable mechanism are improved.
Description
Technical Field
The invention relates to the technical field of high-performance gas turbine engines in aerospace technology, in particular to a linear guide and antifriction transmission mechanism in a variable cycle engine mode switching valve.
Background
A variable cycle engine refers to a gas turbine engine in which different thermodynamic cycles can be achieved on the same engine by changing the geometry, size or position of some of the engine components. The core component of the variable cycle engine is a mode switching valve, which is a structure used for adjusting the turbojet or turbofan working mode of the engine. The transmission mechanism of the mode switching valve is limited by the geometric shape, so that the transmission mechanism frequently generates larger impact and vibration in the working process, the service life of the connecting joint is influenced, and the motion clamping stagnation of the transmission mechanism is caused, so that the variable circulation function of the engine is influenced.
Although the prior art related to the mode selection valve exists in China at present, in engineering practice, the problems of motion clamping stagnation and serious abrasion of connecting joints of a transmission mechanism often occur, and finally, the variable circulation function of an engine is disabled. Therefore, it is desirable to provide a linear guide and antifriction transmission mechanism in a variable cycle engine mode switching valve to solve the above-mentioned problems.
Disclosure of Invention
The invention aims to provide a linear guide and antifriction type transmission mechanism in a variable cycle engine mode switching valve, which is used for ensuring stable operation of the transmission mechanism of the variable cycle engine mode switching valve and reducing friction and abrasion of a kinematic pair joint in the transmission mechanism.
In order to achieve the above purpose, the invention provides a linear guide and antifriction transmission mechanism in a variable cycle engine mode switching valve, which is arranged at an inlet of the engine mode switching valve and comprises a first retainer, wherein the first retainer is fixedly arranged on the inner wall of an engine outer duct inlet, an actuating ring is arranged in the engine outer duct inlet, and an actuating window is detachably connected to one side of the actuating ring away from the first retainer; one end of a transmission shaft is connected to the actuation ring, and the other end of the transmission shaft is connected with a steering shaft; the transmission shaft is sleeved on the inner side of the antifriction component in a sliding way; one side of the retainer, which is far away from the actuating ring, is fixedly provided with a pushing mechanism, the output end of the pushing mechanism is hinged with the steering shaft, and the pushing mechanism drives the actuating ring and the actuating window to move through the transmission shaft.
Preferably, the pushing mechanism comprises a hydraulic actuator cylinder body, the hydraulic actuator cylinder body is fixedly arranged on the first retainer, a hydraulic actuator cylinder driving shaft is slidably arranged in the hydraulic actuator cylinder body, a spherical hinge is arranged at the tail end of the hydraulic actuator cylinder driving shaft, and the steering shaft is fixedly connected with the spherical hinge through a screw rod.
Preferably, the steering shaft is in interference fit with the transmission shaft, and the transmission shaft is in interference fit with the actuation ring.
Preferably, the antifriction component is a linear bearing.
Preferably, the linear bearing comprises a shell, rolling bodies, a second retainer and a sealing gasket, wherein the shell is fixedly arranged on the first retainer, the second retainer is fixedly arranged on the inner wall of the shell, the rolling bodies are arranged on the second retainer, and the transmission shaft is in transition fit with the inner wall of the second retainer; the sealing gaskets are arranged at two ends of the second retainer.
Preferably, the actuating ring is a thin-walled cylinder.
Preferably, one end of the actuating ring, which is close to the pushing mechanism, is provided with two concave holes I at equal intervals along the circumferential direction, and the transmission shaft penetrates through the concave holes and is connected and fixed with the actuating ring through the fixing ring; and a plurality of concave holes II are formed in one end, far away from the pushing mechanism, of the actuation ring at equal intervals along the circumferential direction, and the actuation window is fixedly connected with the concave holes II through a bolt assembly.
Preferably, a lug is fixedly arranged on the outer wall of the actuation window, and the lug is detachably connected with the bolt assembly.
Preferably, both ends of the transmission shaft are provided with chamfers, and the section of the transmission shaft is round.
Preferably, a section of the transmission shaft, which is close to the steering shaft, is a large-diameter section, the middle section of the transmission shaft is in transition fit with the antifriction assembly, the diameters of the middle section of the transmission shaft and the large-diameter section are the same, a section of the transmission shaft, which is close to the actuating ring, is a small-diameter section, and the fixing ring is detachably mounted on the small-diameter section.
Compared with the prior art, the invention has the following advantages and technical effects:
the linear guide and antifriction type transmission mechanism in the variable cycle engine mode switching valve provided by the invention is contacted with the transmission shaft through the linear bearing, so that the effective guide length of the transmission mechanism is increased, the overturning moment generated due to the limitation of the original structure is eliminated, and the stability and the accuracy of transmission are obviously enhanced. The linear bearing provides smooth and stable guiding, so that the transmission connecting rod is smoother in the motion process, and unnecessary vibration and friction are reduced. In addition, the design also effectively improves the transmission efficiency of the transmission mechanism, reduces the energy loss and provides more efficient and stable power transmission for the whole mechanical system.
The linear bearing in the transmission mechanism has the internal balls in direct contact with the outer surface of the transmission shaft, and the design converts the sliding friction between the original transmission shaft and the retainer into the rolling friction between the balls and the outer surface of the transmission shaft; such a transition has the significant advantage that in rolling friction the coefficient of friction is much lower than in sliding friction, and therefore the transmission efficiency is higher and the power loss is smaller. In addition, the abrasion of rolling friction is far less than sliding friction, so that the service life and stability of the transmission mechanism are improved; effectively improves the transmission performance and stability of the transmission mechanism and prolongs the service life of the transmission mechanism.
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 needed in the embodiments will be briefly described below, 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 these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a transmission mechanism of the present invention;
FIG. 2 is a schematic illustration of the installation of a transmission mechanism and an engine outer duct inlet of the present invention;
FIG. 3 is a schematic view of the structure of the cylinder of the hydraulic actuator of the present invention;
FIG. 4 is a schematic view of the structure of the transmission shaft of the present invention;
FIG. 5 is a schematic view of a linear bearing according to the present invention;
FIG. 6 is a schematic view of the structure of the actuating ring of the present invention;
FIG. 7 is a schematic view of an alternate view of the actuator ring of the present invention;
in the figure: 1. a first retainer; 2. a hydraulic ram cylinder; 3. a hydraulic ram drive shaft; 4. spherical hinge; 5. a steering shaft; 6. a transmission shaft; 6-1, a thick diameter section; 6-2, middle section; 6-3, a small diameter section; 7. a linear bearing; 8. actuating the ring; 8-1, concave hole I; 8-2, concave holes II; 9. an engine outer duct inlet; 10. an actuation window; 11. a fixing ring; 12. a bolt assembly; 13. a housing; 14. a rolling element; 15. a second retainer; 16. and a sealing gasket.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art without the inventive effort, are intended to be within the scope of the present invention. The invention will be described in detail below with reference to the drawings in connection with embodiments.
As shown in fig. 1 to 7, the present invention provides a linear guiding and antifriction transmission mechanism in a variable cycle engine mode switching valve, which is disposed at an inlet of the engine mode switching valve, wherein the transmission mechanism comprises a first retainer 1, the first retainer 1 is fixedly mounted on an inner wall of an engine outer duct inlet 9, an actuating ring 8 is disposed in the engine outer duct inlet 9, and an actuating window 10 is detachably connected to one side of the actuating ring 8 away from the first retainer 1; one end of a transmission shaft 6 is connected to the actuation ring 8, the other end of the transmission shaft 6 is connected with a steering shaft 5, the steering shaft 5 is in interference fit with the transmission shaft 6, and the transmission shaft 6 is in interference fit with the actuation ring 8; the side of the retainer 1, which is close to the actuating ring 8, is fixedly provided with an antifriction component which is a linear bearing 7, and the transmission shaft 6 is sleeved on the inner side of the antifriction component in a sliding way; a pushing mechanism is fixedly arranged on one side of the first retainer 1, which is far away from the actuating ring 8; the pushing mechanism comprises a hydraulic actuator cylinder body 2, the hydraulic actuator cylinder body 2 is fixedly arranged on a first retaining frame 1, a hydraulic actuator cylinder driving shaft 3 is slidably arranged in the hydraulic actuator cylinder body 2, a spherical hinge 4 is arranged at the tail end of the hydraulic actuator cylinder driving shaft 3, and a steering shaft 5 is fixedly connected with the spherical hinge 4 through a screw rod.
The hydraulic actuator driving shaft 3 is driven to move left and right in the hydraulic actuator cylinder 2 by precisely controlling the oil pressure in the hydraulic actuator cylinder 2, and the actuating ring 8 and the actuating window 10 are driven to move by the transmission shaft 6, so that the opening and closing of the mode selection valve are controlled. The linear bearing 7 can change the friction mode between the components from sliding friction to rolling friction, thereby greatly reducing friction force and improving the smoothness and durability of transmission. Meanwhile, the rolling friction of the steel balls has better adaptability, so that the impact can be buffered and absorbed, and the stability of transmission and the noise suppression capability are improved.
Further, the linear bearing 7 comprises a shell 13, rolling bodies 14, a second retainer 15 and a sealing gasket 16, wherein the shell 13 is fixedly arranged on the first retainer 1, the second retainer 15 is fixedly arranged on the inner wall of the shell 13, the rolling bodies 14 are arranged on the second retainer 15, and the transmission shaft 6 is in transition fit with the inner wall of the second retainer 15; sealing washers 16 are mounted at both ends of the second holder 15.
The linear bearing 7 supports and guides the linear motion function through the rolling of the rolling bodies 14, and can realize high-precision linear motion, and has compact structure, high precision and small abrasion. The inner ring of the second retainer 15 of the linear bearing 7 is matched with the transmission shaft 6 in a transition matching mode, so that the linear bearing has interchangeability, and is convenient for a user to install and detach and convenient to maintain.
Further, the actuating ring 8 is a thin-walled cylinder; two concave holes I8-1 are formed in one end, close to the pushing mechanism, of the actuation ring 8 at equal intervals along the circumferential direction, and the transmission shaft 6 penetrates through the concave holes I8-1 and is fixedly connected with the actuation ring 8 through a fixing ring 11; a plurality of concave holes 8-2 are formed in one end, far away from the pushing mechanism, of the actuation ring 8 at equal intervals along the circumferential direction, and the actuation window 10 and the concave holes 8-2 are fixedly connected through a bolt assembly 12.
Further, a lug is fixedly provided on the outer wall of the actuation window 10, and the lug is detachably connected with the bolt assembly 12.
Further, both ends of the transmission shaft 6 are provided with chamfers, and the section of the transmission shaft 6 is round.
Further, a section of the transmission shaft 6 close to the steering shaft 5 is a large-diameter section 6-1, a middle section 6-2 of the transmission shaft 6 is in transition fit with the antifriction assembly, the diameters of the middle section 6-2 of the transmission shaft 6 and the large-diameter section 6-1 are the same, a section of the transmission shaft 6 close to the actuating ring 8 is a small-diameter section 6-3, and the fixing ring 11 is detachably mounted on the small-diameter section 6-3.
The invention provides a linear guide and antifriction type transmission mechanism in a variable cycle engine mode switching valve, which is based on the working principle that:
when the hydraulic actuator cylinder driving shaft 3 moves, the steering shaft 5, the transmission shaft 6, the linear bearing 7, the actuating ring 8 and the actuating window 10 are driven to move linearly; the steering shaft 5 has a certain height on a guide path perpendicular to the linear motion, which generates a overturning moment, the overturning moment acts on the hydraulic actuator driving shaft 3, and compared with the spherical hinge 4 at the tail end, the hydraulic actuator driving shaft 3 and other rigid connecting rods have higher rigidity, so that the overturning moment mainly acts on the spherical hinge 4 at the tail end, and the spherical hinge 4 is worn and blocked by a transmission mechanism.
When the linear bearing 7 is installed, the inner ring of the linear bearing 7 is matched with the transmission shaft 6, and the shell 13 of the linear bearing 7 is fixed on the first retaining frame 1. The overturning moment will also act on the linear bearing 7 at this time, but due to the characteristics of the linear bearing 7, the force flow of the overturning moment will be guided to the first cage 1 through the linear bearing 7, and finally act on the ground. The linear guide function of the transmission is achieved in that the overturning moment acting on the transmission shaft 6 is eliminated. The rolling bodies 14 in the linear bearing 7 are contacted with the surface of the transmission shaft 6, so that the contact mode is changed, the friction and abrasion of the surface of the transmission shaft 6 are reduced, and the antifriction function of the transmission mechanism is realized. The invention has the characteristics of simple structure, reasonable design, compact structure, small friction and wear, stable performance and easy realization, and reduces the working stress of the hinge.
The invention cooperates with the mode selection valve in the variable cycle engine adjustable mechanism to realize the conversion between the two modes of opening and closing of the valve, so that the engine has optimal performance in a wider working range. By the guiding function of the linear bearing 7, friction and abrasion generated in the working process of the transmission mechanism can be reduced, and the working stability and reliability of the active control mode switching valve in the engine adjustable mechanism can be improved.
The foregoing is merely a preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present application should be covered in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. The linear guide and antifriction transmission mechanism in the variable cycle engine mode switching valve is arranged at an inlet of the engine mode switching valve and is characterized by comprising a first retainer (1), wherein the first retainer (1) is fixedly arranged on the inner wall of an engine outer duct inlet (9), an actuating ring (8) is arranged in the engine outer duct inlet (9), and an actuating window (10) is detachably connected to one side, far away from the first retainer (1), of the actuating ring (8); one end of a transmission shaft (6) is connected to the actuating ring (8), and the other end of the transmission shaft (6) is connected with a steering shaft (5); the first retainer (1) is fixedly provided with an antifriction assembly at one side close to the actuating ring (8), and the transmission shaft (6) is sleeved on the inner side of the antifriction assembly in a sliding manner; one side of the first retainer (1) far away from the actuating ring (8) is fixedly provided with a pushing mechanism, the output end of the pushing mechanism is hinged with the steering shaft (5), and the pushing mechanism drives the actuating ring (8) and the actuating window (10) to move through the transmission shaft (6).
2. The linear guide and antifriction transmission mechanism in the variable cycle engine mode switching valve according to claim 1, characterized in that the pushing mechanism includes a hydraulic cylinder body (2), the hydraulic cylinder body (2) is fixedly installed on the first retainer (1), a hydraulic cylinder driving shaft (3) is installed on the inner side of the hydraulic cylinder body (2), a spherical hinge (4) is provided at the end of the hydraulic cylinder driving shaft (3), and the steering shaft (5) is fixedly connected with the spherical hinge (4) through a screw.
3. The linear guide and antifriction transmission mechanism in a variable cycle engine mode switching valve of claim 1 characterized in that the steering shaft (5) is in an interference fit with the drive shaft (6) and the drive shaft (6) is in an interference fit with the actuation ring (8).
4. The linear guide and antifriction transmission mechanism in a variable cycle engine mode switching valve of claim 1 wherein the antifriction component is a linear bearing (7).
5. The linear guide and antifriction transmission mechanism in a variable cycle engine mode switching valve in accordance with claim 4 characterized in that the linear bearing (7) includes a housing (13), a rolling element (14), a second cage (15) and a sealing gasket (16), the housing (13) is fixedly mounted on the first cage (1), the second cage (15) is fixedly mounted on the inner wall of the housing (13), the rolling element (14) is mounted on the second cage (15), the transmission shaft (6) is in transition fit with the inner wall of the second cage (15); the sealing gaskets (16) are arranged at two ends of the second retainer (15).
6. The linear guide and antifriction transmission mechanism in a variable cycle engine mode switching valve of claim 1 characterized in that the actuation ring (8) is a thin walled cylinder.
7. The linear guide and antifriction transmission mechanism in the variable cycle engine mode switching valve according to claim 6, characterized in that the end of the actuating ring (8) close to the pushing mechanism is provided with two concave holes one (8-1) at equal intervals along the circumferential direction, and the transmission shaft (6) passes through the concave holes one (8-1) and is connected and fixed with the actuating ring (8) through a fixing ring (11); one end of the actuating ring (8) far away from the pushing mechanism is provided with a plurality of concave hole two (8-2) at equal intervals along the circumferential direction, and the actuating window (10) and the concave hole two (8-2) are fixedly connected through a bolt assembly (12).
8. The linear guide and antifriction transmission mechanism in a variable cycle engine mode switching valve of claim 7 characterized in that a lug is fixedly provided on the outer wall of the actuation window (10) and is detachably connected to the bolt assembly (12).
9. The linear guide and antifriction transmission mechanism in the variable cycle engine mode switching valve of claim 7 characterized in that both ends of the transmission shaft (6) are provided with chamfers, and the section of the transmission shaft (6) is circular.
10. The linear guide and antifriction transmission mechanism in a variable cycle engine mode switching valve according to claim 9, characterized in that the section of the transmission shaft (6) near the steering shaft (5) is a large diameter section (6-1), the middle section (6-2) of the transmission shaft (6) is in transition fit with the antifriction component, the middle section (6-2) of the transmission shaft (6) is the same as the large diameter section (6-1) in diameter, the section of the transmission shaft (6) near the actuation ring (8) is a small diameter section (6-3), and the fixed ring (11) is detachably mounted on the small diameter section (6-3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311771153.1A CN117514475A (en) | 2023-12-21 | 2023-12-21 | Linear guide and antifriction transmission mechanism in variable cycle engine mode switching valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311771153.1A CN117514475A (en) | 2023-12-21 | 2023-12-21 | Linear guide and antifriction transmission mechanism in variable cycle engine mode switching valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117514475A true CN117514475A (en) | 2024-02-06 |
Family
ID=89745888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311771153.1A Pending CN117514475A (en) | 2023-12-21 | 2023-12-21 | Linear guide and antifriction transmission mechanism in variable cycle engine mode switching valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117514475A (en) |
-
2023
- 2023-12-21 CN CN202311771153.1A patent/CN117514475A/en active Pending
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