Anti-surge device and engine

Abstract

The invention relates to the technical field of engines, and discloses an anti-surge device and an engine, and the anti-surge device comprises a shell which is provided with a first channel, a second channel and a third channel. The first valve part is connected with the first rotating shaft, the first valve part is arranged in the first channel, the first valve part can block or open the first channel according to the pressure difference change of the two sides of the first valve part, and the elastic part is used for driving the first valve part to have the trend of moving from the state of opening the first channel to the state of blocking the first channel. The second valve piece is connected with the second rotating shaft and suitable for blocking or opening the second channel. The input end of the transmission assembly is connected with the first rotating shaft, and the output end is connected with the second rotating shaft. When the first valve is in the state of blocking the first channel, the second valve opens the second channel, and when the first valve is in the state of opening the first channel, the second valve blocks the second channel. Synchronous action of the first valve body assembly and the second valve body assembly can be achieved.

Description

Technical Field

[0001] This application relates to the technical field of engines, and particularly to an anti-surge device and an engine. Background Art

[0002] As a core subsystem of modern large aircraft, the Auxiliary Power Unit (APU) undertakes key functions such as starting power supply for the main engine and air supply for the environmental control system. Its air extraction system conveys compressed air to the environmental control system and the main engine starting device through a compressor, and the working stability of the compressor needs to be precisely maintained during this process. Due to complex working conditions such as drastic changes in atmospheric pressure / temperature and dynamic fluctuations in air extraction load during flight, the compressor is extremely prone to deviating from the designed operating point and entering the surge zone, resulting in serious faults such as air flow reverse flow and blade flutter fracture, which is directly related to the reliability of the APU system and flight safety.

[0003] The traditional APU air extraction control system adopts a "dual-valve joint control" scheme, with a load valve set at the air extraction outlet end and an anti-surge valve set at the air release port end. When the aircraft requests air extraction, the control system synchronously receives external instructions and executes: closing the anti-surge valve and opening the load valve simultaneously to make the compressed air flow to the air-using equipment; when terminating air extraction, it operates in the reverse direction, opening the anti-surge valve and closing the load valve to release the residual air pressure. This scheme relies on the strict synchronization of the action timings of the two valves, and the valve actuators need to be controlled with millisecond-level timing by an electronic controller.

[0004] In actual operation, due to factors such as solenoid valve response delay, actuator mechanical wear, and air pressure backflush interference, it is easy for the action timing deviation of the two valves to exceed the safety threshold. The specific manifestations are as follows: when the anti-surge valve lags in closing during the air extraction start stage, an air extraction / air release dual path is formed, causing the APU to overheat; when the anti-surge valve lags in opening during the air extraction closing stage, the two valves close synchronously, resulting in a sharp increase in the back pressure of the compressor and inducing surge. Summary of the Invention

[0005] This application provides an anti-surge device and an engine to solve the problem that the action timing deviation between the load valve and the anti-surge valve exceeds the safety threshold.

[0006] In the first aspect, the present application provides an anti-surge device, comprising a housing, a first valve body assembly, a second valve body assembly and a transmission assembly. The housing is provided with a first channel, a second channel and a third channel, and the output end of the third channel is respectively connected to the input end of the first channel and the second channel. The first valve body assembly comprises a first valve member, a first rotating shaft and an elastic member, wherein the first valve member is connected to the first rotating shaft, the first rotating shaft rotates along its circumference, the first valve member is arranged in the first channel, the first valve member can block or open the first channel according to the pressure difference change on both sides of the first valve member, and the elastic member is used to drive the first valve member to have a tendency to move from the state of opening the first channel to the state of blocking the first channel. The second valve body assembly comprises a second valve member and a second rotating shaft, the second valve member is connected to the second rotating shaft, and the second rotating shaft can rotate along its circumference, the second valve member is arranged in the second channel, and the second valve member is suitable for blocking or opening the second channel. The input end of the transmission assembly is connected to the first rotating shaft, and the output end thereof is connected to the second rotating shaft. Wherein, when the first valve component is in a state of blocking the first channel, the second valve component opens the second channel; when the first valve component is in a state of opening the first channel, the second valve component blocks the second channel.

[0007] Beneficial effects: Through the mechanical linkage design (the first shaft and the second shaft are connected through the transmission assembly), the forced synchronous action of the first valve body assembly (load valve) and the second valve body assembly (anti-surge valve) is realized, which completely eliminates the risk of timing deviation caused by solenoid valve delay and mechanical wear in traditional electronic timing control. The pressure difference drive of the first valve component is combined with the elastic component reset mechanism to dynamically adjust the valve state when the air pressure fluctuates, avoiding surge caused by surge in back pressure, and reducing the risk of APU overload.

[0008] In an optional embodiment, the first valve body assembly further includes a third valve component, the third valve component includes a second connecting portion and a second blocking portion, the second connecting portion is connected to the second blocking portion at its first axial end, the second connecting portion is sleeved on the first rotating shaft and can rotate along the circumference of the first rotating shaft, and the second connecting portion is connected to the input end of the transmission component at its second axial end. The first valve component includes a first connecting portion and a first blocking portion, the first connecting portion is connected to the first blocking portion at its first axial end, the first connecting portion is connected to the first rotating shaft at its second axial end, the first blocking portion and the second blocking portion form a disc structure, and are adapted to the inner cavity cross section of the first channel perpendicular to its extension direction.

[0009] Beneficial effects: The first valve member and the third valve member (the second blocking portion) together form a disc structure, which can be perfectly adapted to the inner cavity cross-section of the first channel. After combination, a sealing mechanism is formed. This design can evenly distribute the air flow pressure under high-pressure conditions. At the same time, the linkage rotation of the disc structure ensures the physical coupling of the actions of the two valves, that is, the first blocking portion and the second blocking portion can approach each other to open the first channel, or the first blocking portion and the second blocking portion can move away from each other to block the first channel, further improving the synchronization accuracy and the action sensitivity.

[0010] In an alternative embodiment, the transmission assembly includes a first bevel gear, a second bevel gear, and a third bevel gear. The first bevel gear is coaxially arranged with the first rotating shaft and is connected to the first rotating shaft. The second bevel gear is coaxially arranged with the second connecting portion and is connected to the second end of the second connecting portion along its axial direction. The third bevel gear is coaxially arranged with the second rotating shaft and is connected to the second rotating shaft. Both the first bevel gear and the second bevel gear are engaged with the third bevel gear.

[0011] Beneficial effects: The bevel gear transmission system (the first bevel gear, the second bevel gear, and the third bevel gear are engaged) precisely converts the rotation of the first rotating shaft into the reverse action of the second rotating shaft, realizing the strict reverse synchronization of the opening and closing states of the two valves. The high transmission ratio and meshing characteristics of the bevel gears can effectively transmit torque, avoid mechanical slipping, and ensure that the action timing error approaches zero under extreme conditions. At the same time, the first bevel gear and the second bevel gear can rotate in opposite directions, thereby realizing the approaching or separating actions of the first blocking portion and the second blocking portion.

[0012] In an alternative embodiment, the transmission assembly further includes a housing provided with a fourth channel and a fifth channel that communicate with each other, and the axes of the fourth channel and the fifth channel intersect. The first end of the fourth channel along its axial direction communicates with the first channel, and the first end of the fifth channel along its axial direction communicates with the second channel. Among them, the first end of the first rotating shaft along its axial direction extends into the fourth channel and is connected to the first bevel gear, the first end of the second connecting portion along its axial direction extends into the fourth channel and is connected to the second bevel gear, and the second end of the second rotating shaft along its axial direction extends into the fifth channel and is connected to the third bevel gear.

[0013] Beneficial effects: The intersecting design of the fourth channel and the fifth channel in the housing optimizes the spatial layout of the transmission assembly, making the meshing point of the bevel gears located outside the air flow channel and avoiding compressed air from polluting the transmission components.

[0014] In an alternative embodiment, the transmission assembly further includes a first mounting seat, a first bearing, a second mounting seat, and a second bearing. The first mounting seat is arranged as a cylindrical structure, and the peripheral side wall passing through the first channel communicates with the first channel. A flange is provided on the peripheral side wall of the first mounting seat, and the flange is connected to the outer wall of the housing. The inner cavity of the first mounting seat communicates with the fourth channel, and the second connecting portion and the first rotating shaft penetrate through the first mounting seat. The first bearing is arranged between the peripheral side wall of the second connecting portion and the inner peripheral side wall of the first mounting seat. The second mounting seat includes a connected limiting portion and a receiving portion, both of which are arranged as cylindrical structures, and the axes of the limiting portion and the receiving portion coincide. The receiving portion is relatively fixed to the inner wall of the fourth channel. A notch is provided on the peripheral side wall of the receiving portion. The first bevel gear is located inside the receiving portion, and the first bevel gear extends out from the notch and meshes with the third bevel gear. The second connecting portion and the first rotating shaft penetrate through the limiting portion. The second bearing is arranged between the peripheral side wall of the second connecting portion and the inner peripheral side wall of the limiting portion, and the first bevel gear is located between the first mounting seat and the second mounting seat.

[0015] Advantageous effects: The combination of the first mounting seat and the second mounting seat with the bearing assembly realizes the position fixation of the second connecting portion, ensuring the stable rotation of the second connecting portion and the first rotating shaft.

[0016] In an alternative embodiment, a pin is provided on the side of the flange facing the first bevel gear. A collar is provided at the first end of the elastic member, and the collar is sleeved on the pin. The second end of the elastic member is connected to the first bevel gear.

[0017] Advantageous effects: The cooperative design of the flange pin and the elastic member collar enables the elastic restoring force to directly act on the bevel gear, reducing intermediate transmission loss and ensuring the rapid reset of the first valve member.

[0018] In an alternative embodiment, the transmission assembly further includes a third mounting seat and a third bearing. The third mounting seat is arranged on the inner peripheral side wall of the fifth channel. The third mounting seat is arranged as a cylindrical structure. The third bevel gear penetrates through the third mounting seat and coincides with the axis of the third mounting seat. The third bearing is arranged between the peripheral side wall of the third bevel gear and the inner peripheral side wall of the third mounting seat.

[0019] Advantageous effects: The axial positioning design of the third bearing effectively restricts the radial runout of the rotating shaft, avoiding seal failure caused by eccentric wear of the valve member. The anti-friction characteristics of the bearing can significantly reduce mechanical resistance, enabling the valve to still act sensitively under a small pressure difference, especially adapting to the lubrication degradation conditions at high altitudes and low temperatures.

[0020] In an alternative embodiment, a fourth bearing is further included. A first connection channel is provided on the inner peripheral sidewall of the first channel. The first connection channel coincides with the axis of the first connection portion. The fourth bearing is provided between the outer peripheral sidewall of the second end of the first connection portion along its axial direction and the inner peripheral sidewall of the first connection channel.

[0021] Advantageous effects: The axial positioning design of the fourth bearing effectively restricts the radial runout of the rotating shaft, avoiding seal failure caused by eccentric wear of the valve parts. The anti-friction characteristic of the bearing can significantly reduce the mechanical resistance, enabling the valve to still act sensitively under a small pressure difference, especially adapting to the lubrication degradation condition in the high-altitude and low-temperature environment.

[0022] In an alternative embodiment, a fifth bearing is further included. A second connection channel is provided on the inner peripheral sidewall of the second channel. The second connection channel coincides with the axis of the second rotating shaft. The fifth bearing is provided between the outer peripheral sidewall of the second rotating shaft and the inner peripheral sidewall of the second connection channel.

[0023] Advantageous effects: The axial positioning design of the fifth bearing effectively restricts the radial runout of the rotating shaft, avoiding seal failure caused by eccentric wear of the valve parts. The anti-friction characteristic of the bearing can significantly reduce the mechanical resistance, enabling the valve to still act sensitively under a small pressure difference, especially adapting to the lubrication degradation condition in the high-altitude and low-temperature environment.

[0024] In a second aspect, the present application further provides an engine including the anti-surge device described above.

[0025] Since the engine includes the anti-surge device and has the same effects as the anti-surge device, they will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 is a schematic structural diagram of an anti-surge device according to an embodiment of the present application;

[0028] Figure 2 is Figure 1 a partial enlarged view of A in

[0029] Figure 3 is Figure 1 a partial enlarged view of B in

[0030] Figure 4 is Figure 1Partial enlarged schematic diagram of C;

[0031] Figure 5 Structural schematic diagram of the first channel in the blocked state in the embodiment of the present application;

[0032] Figure 6 Structural schematic diagram of the first channel in the open state in the embodiment of the present application;

[0033] Figure 7 Structural schematic diagram of the housing in the embodiment of the present application;

[0034] Figure 8 Structural schematic diagram of the second mounting seat in the embodiment of the present application;

[0035] Figure 9 Structural schematic diagram of the elastic member in the embodiment of the present application;

[0036] Figure 10 Structural schematic diagram of the first mounting seat in the embodiment of the present application.

[0037] Explanation of reference numerals:

[0038] 1. Housing; 101. First channel; 102. Second channel; 103. Third channel; 4. First valve member; 401. First connection portion; 402. First blocking portion; 5. First rotating shaft; 6. Elastic member; 7. Second valve member; 8. Second rotating shaft; 9. Third valve member; 901. Second connection portion; 902. Second blocking portion; 10. First bevel gear; 11. Second bevel gear; 12. Third bevel gear; 13. Housing; 1301. Fourth channel; 1302. Fifth channel; 14. First mounting seat; 15. Flange; 16. First bearing; 17. Second mounting seat; 1701. Limiting portion; 1702. Accommodating portion; 18. Second bearing; 19. Pin; 20. Collar; 21. Third mounting seat; 22. Third bearing; 23. Fourth bearing; 24. First connection channel; 25. Fifth bearing; 26. Second connection channel. Detailed implementation manners

[0039] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some but not all of the embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0040] The following combines Figures 1 to 10 , to describe the embodiments of the present application.

[0041] According to an embodiment of the present application, on the one hand, an anti-surge device is provided, including a housing 1, a first valve body assembly, a second valve body assembly and a transmission assembly. The housing 1 is provided with a first channel 101, a second channel 102 and a third channel 103, and the output end of the third channel 103 is respectively connected to the input end of the first channel 101 and the second channel 102. The first valve body assembly includes a first valve member 4, a first rotating shaft 5 and an elastic member 6, the first valve member 4 is connected to the first rotating shaft 5, the first rotating shaft 5 rotates along its circumference, the first valve member 4 is arranged in the first channel 101, the first valve member 4 can block or open the first channel 101 according to the pressure difference change on both sides of the first valve member 4, and the elastic member 6 is used to drive the first valve member 4 so that it has a tendency to move from the state of opening the first channel 101 to the state of blocking the first channel 101. The second valve body assembly includes a second valve member 7 and a second rotating shaft 8. The second valve member 7 is connected to the second rotating shaft 8, and the second rotating shaft 8 can rotate along its circumferential direction. The second valve member 7 is arranged in the second channel 102, and the second valve member 7 is suitable for blocking or opening the second channel 102. The input end of the transmission assembly is connected to the first rotating shaft 5, and the output end thereof is connected to the second rotating shaft 8. When the first valve member 4 is in a state of blocking the first channel 101, the second valve member 7 opens the second channel 102. When the first valve member 4 is in a state of opening the first channel 101, the second valve member 7 blocks the second channel 102.

[0042] It can be understood that the anti-surge device integrates the traditional anti-surge valve and the load valve. The compressed air supplied from the APU is divided into two paths after passing through the third channel 103. One path is the bleed path, i.e., the first channel 101, which supplies the aircraft, and the other path is the exhaust path, i.e., the second channel 102, which removes excess gas for anti-surge. Figure 1 As shown, a first valve body assembly is arranged in the first channel 101, and a second valve body assembly is arranged in the second channel 102. The first valve body assembly and the second valve body assembly are connected by a transmission assembly to ensure that the second valve body assembly is closed when the first valve body assembly is opened, and the second valve body assembly is opened when the first valve body assembly is closed. An elastic member 6 is arranged in the transmission assembly, and the preload force of the elastic member 6 keeps the first valve body in a closed state. When the aircraft needs to bleed air, the corresponding load valve is directly opened, and a pressure difference will be generated between the APU air supply end and the aircraft bleed air end. The first valve body on the APU will overcome the preload force of the elastic member 6 and open under the pressure difference of the compressed air, and the second valve member 7 will be closed in linkage to ensure the aircraft bleed air demand. When the aircraft needs to close the bleed air, the corresponding load valve is directly closed, and the pressure difference between the APU air supply end and the aircraft bleed air end is 0. The first valve member 4 is automatically closed under the action of the spring preload force, and the second valve member 7 is opened in linkage to ensure that the APU venting path is unobstructed and prevent APU surge.

[0043] In this embodiment, the first valve assembly (load valve) and the second valve assembly (anti-surge valve) are forced to synchronize through mechanical linkage design (the first rotating shaft 5 and the second rotating shaft 8 are connected through a transmission assembly), which completely eliminates the risk of timing deviation caused by electromagnetic valve delay and mechanical wear in traditional electronic timing control. The pressure difference drive of the first valve member 4 is combined with the reset mechanism of the elastic member 6 to dynamically adjust the valve state when the air pressure fluctuates, avoiding surge caused by a surge in back pressure, while reducing the risk of APU overload.

[0044] In one embodiment, the first valve body assembly further includes a third valve member 9, the third valve member 9 includes a second connection portion 901 and a second blocking portion 902, the first end of the second connection portion 901 along its axial direction is connected to the second blocking portion 902, the second connection portion 901 is sleeved on the first rotating shaft 5, and can rotate along the circumference of the first rotating shaft 5, and the second end of the second connection portion 901 along its axial direction is connected to the input end of the transmission assembly. The first valve member 4 includes a first connection portion 401 and a first blocking portion 402, the first end of the first connection portion 401 along its axial direction is connected to the first blocking portion 402, the second end of the first connection portion 401 along its axial direction is connected to the first rotating shaft 5, the first blocking portion 402 and the second blocking portion 902 form a disc structure, and are adapted to the inner cavity cross section of the first channel 101 perpendicular to its extension direction.

[0045] It can be understood that the first valve member 4 and the third valve member 9 in the first valve body assembly cooperate with each other to achieve the blocking of the first channel 101. The first valve member 4 is installed on the inner ring of the fourth bearing 23, two fourth bearings 23 are provided, and the two fourth bearings 23 are separated by a spacer sleeve. The first rotating shaft 5 passes through the first connecting portion 401 and the second connecting portion 901, and is fastened to the first connecting portion 401 by threads, taking into account locking the inner ring of the fourth bearing 23.

[0046] In this embodiment, the first valve member 4 and the third valve member 9 (the second blocking portion 902) together form a disc structure, which can be fully adapted to the inner cavity cross-section of the first channel 101, and a sealing mechanism is formed after the combination. This design can evenly distribute the airflow pressure under high-pressure conditions, and the linkage rotation of the disc structure ensures the physical coupling of the two valve actions, that is, the first blocking portion 402 and the second blocking portion 902 can be close to each other to realize the opening of the first channel 101, or the first blocking portion 402 and the second blocking portion 902 can be far away from each other to realize the blocking of the first channel 101, further improving the synchronization accuracy and improving the action sensitivity.

[0047] In one embodiment, the transmission assembly includes a first bevel gear 10, a second bevel gear 11, and a third bevel gear 12. The first bevel gear 10 is coaxially arranged with the first rotating shaft 5 and is connected to the first rotating shaft 5. The second bevel gear 11 is coaxially arranged with the second connecting portion 901 and is connected to the second end of the second connecting portion 901 along its axial direction. The third bevel gear 12 is coaxially arranged with the second rotating shaft 8 and is connected to the second rotating shaft 8. Both the first bevel gear 10 and the second bevel gear 11 are engaged with the third bevel gear 12.

[0048] It should be noted that the inner rings of the first bearing 16 and the second bearing 18 are spaced apart by the second bevel gear 11 and locked by the first locking nut. The first bevel gear 10 is installed at the end of the first rotating shaft 5 and locked by the second locking nut.

[0049] In this embodiment, the bevel gear transmission system (the first bevel gear 10, the second bevel gear 11, and the third bevel gear 12 are engaged) precisely converts the rotation of the first rotating shaft 5 into the reverse movement of the second rotating shaft 8, realizing the strict reverse synchronization of the opening and closing states of the two valves. The high transmission ratio and meshing characteristics of the bevel gears can effectively transmit torque, avoid mechanical slipping, and ensure that the action timing error approaches zero under extreme working conditions. At the same time, the first bevel gear 10 and the second bevel gear 11 can rotate in opposite directions, thereby realizing the approaching or separating actions of the first sealing portion 402 and the second sealing portion 902.

[0050] In one embodiment, the transmission assembly further includes a housing 13 provided with a fourth channel 1301 and a fifth channel 1302 that communicate with each other, and the axes of the fourth channel 1301 and the fifth channel 1302 intersect. The first end of the fourth channel 1301 along its axial direction communicates with the first channel 101, and the first end of the fifth channel 1302 along its axial direction communicates with the second channel 102. Among them, the first end of the first rotating shaft 5 along its axial direction extends into the fourth channel 1301 and is connected to the first bevel gear 10, the first end of the second connecting portion 901 along its axial direction extends into the fourth channel 1301 and is connected to the second bevel gear 11, and the second end of the second rotating shaft 8 along its axial direction extends into the fifth channel 1302 and is connected to the third bevel gear 12.

[0051] It can be understood that the first mounting seat 14, the second mounting seat 17, and the third mounting seat 21 are all arranged inside the housing 13. The housing 13 is configured as a tee seat structure and its axial displacement is restricted by a circlip. One end of the housing 13 is fixed to the housing 1 by screws, and a slidable sleeve is arranged at the other end for convenient assembly. Specifically, mounting holes are provided on the outer wall of the first channel 101, and the first mounting seat 14 is arranged in the mounting holes. The flange 15 of the first mounting seat 14 and the housing 13 are fixedly installed on the outer wall of the mounting holes by screws. A sleeve is threadedly connected to the outer wall of the second channel 102, and the other end of the sleeve is connected to the fifth channel 1302 through a rubber ring and a snap ring. During assembly, first press the sleeve structure into the fifth channel 1302, install the housing 13 equipped with the third bevel gear onto the housing 1 and connect them with screws, and then pull out the sleeve and screw it onto the housing 1. In order to ensure sealing, a rubber ring is arranged between the sleeve and the housing 1. The third bevel gear is provided with a square hole for torque transmission connection with the second rotating shaft 8.

[0052] In this embodiment, the intersecting design of the fourth channel 1301 and the fifth channel 1302 inside the housing 13 optimizes the spatial layout of the transmission components, making the meshing point of the bevel gears located outside the air flow channel to avoid compressed air polluting the transmission parts.

[0053] In one embodiment, the transmission assembly further includes a first mounting seat 14, a first bearing 16, a second mounting seat 17, and a second bearing 18. The first mounting seat 14 is configured as a cylindrical structure, penetrating through the peripheral side wall of the first channel 101 and communicating with the first channel 101. A flange 15 is provided on the peripheral side wall of the first mounting seat 14, and the flange 15 is connected to the outer wall of the housing 13. The inner cavity of the first mounting seat 14 communicates with the fourth channel 1301. The second connecting portion 901 and the first rotating shaft 5 penetrate through the first mounting seat 14. The first bearing 16 is arranged between the peripheral side wall of the second connecting portion 901 and the inner peripheral side wall of the first mounting seat 14. The second mounting seat 17 includes a connected limiting portion 1701 and a receiving portion 1702, both of which are configured as cylindrical structures, and the axes of the limiting portion 1701 and the receiving portion 1702 coincide. The receiving portion 1702 is relatively fixed to the inner wall of the fourth channel 1301. A notch is provided on the peripheral side wall of the receiving portion 1702. The first bevel gear 10 is located inside the receiving portion 1702, and the first bevel gear 10 extends out from the notch and meshes with the third bevel gear 12. The second connecting portion 901 and the first rotating shaft 5 penetrate through the limiting portion 1701. The second bearing 18 is arranged between the peripheral side wall of the second connecting portion 901 and the inner peripheral side wall of the limiting portion 1701. The first bevel gear 10 is located between the first mounting seat 14 and the second mounting seat 17.

[0054] It should be noted that the second connecting portion 901 of the third valve member 9 is installed on the inner rings of the first bearing 16 and the second bearing 18. The outer ring of the first bearing 16 is supported on the first mounting seat 14, the outer ring of the second bearing 18 is supported on the second mounting seat 17, and the second mounting seat 17 is installed on the housing 13. Both the first mounting seat 14 and the housing 13 are installed on the housing 1.

[0055] In this embodiment, the combination of the first mounting seat 14 and the second mounting seat 17 with the bearing assembly realizes the position fixation of the second connecting portion 901, ensuring the stable rotation of the second connecting portion 901 and the first rotating shaft 5.

[0056] In one embodiment, a pin 19 is provided on the side of the flange 15 facing the first bevel gear 10. A collar 20 is provided at the first end of the elastic member 6, and the collar 20 is sleeved on the pin 19. The second end of the elastic member 6 is connected to the first bevel gear 10.

[0057] Optionally, the first mounting seat 14 forms an annular groove through the flange 15, and the pin 19 is located in the annular groove.

[0058] Optionally, the elastic member 6 can be set as a spring.

[0059] It should be noted that one end of the elastic member 6 is welded to the second gear, and the bottom abuts against the annular groove of the first mounting seat 14. The collar 20 at the bottom of the elastic member 6 is sleeved on the pin 19 of the first mounting seat 14 to prevent the elastic member 6 from rotating. A certain circumferential pre-tightening force is applied during the assembly of the elastic member 6 to ensure that the first valve member 4 and the third valve member 9 are closed and the second valve member 7 is opened in the assembled state.

[0060] In this embodiment, the cooperative design of the flange 15, the pin 19 and the collar 20 of the elastic member 6 enables the elastic restoring force to directly act on the bevel gear, reducing the intermediate transmission loss and ensuring the rapid reset of the first valve member 4.

[0061] In one embodiment, the transmission assembly further includes a third mounting seat 21 and a third bearing 22. The third mounting seat 21 is arranged on the inner peripheral side wall of the fifth channel 1302. The third mounting seat 21 is arranged in a cylindrical structure. The third bevel gear 12 passes through the third mounting seat 21 and coincides with the axis of the third mounting seat 21. The third bearing 22 is arranged between the outer peripheral side wall of the third bevel gear 12 and the inner peripheral side wall of the third mounting seat 21.

[0062] In this embodiment, the axial positioning design of the third bearing 22 effectively restricts the radial runout of the rotating shaft, avoiding seal failure caused by valve member eccentric wear. The anti-friction characteristics of the bearing can significantly reduce the mechanical resistance, enabling the valve to still act sensitively under a small pressure difference, especially adapting to the lubrication degradation conditions in high-altitude and low-temperature environments.

[0063] In one embodiment, a fourth bearing 23 is further included. A first connection channel 24 is provided on the inner peripheral side wall of the first channel 101. The first connection channel 24 coincides with the axis of the first connection portion 401. A fourth bearing 23 is provided between the outer peripheral side wall of the second end of the first connection portion 401 along its axial direction and the inner peripheral side wall of the first connection channel 24.

[0064] Optionally, on the inner walls of the first connection channels 24 of the two fourth bearings 23, a cover plate is provided at the end of the first connection channel 24. The cover plate is used to limit the axial movement of the first rotating shaft 5.

[0065] In this embodiment, the axial positioning design of the fourth bearing 23 effectively restrains the radial runout of the rotating shaft and avoids seal failure caused by eccentric wear of the valve parts. The anti-friction characteristic of the bearing can significantly reduce the mechanical resistance, enabling the valve to still act sensitively under a small pressure difference, especially adapting to the lubrication degradation condition in the high-altitude and low-temperature environment.

[0066] In one embodiment, a fifth bearing 25 is further included. A second connection channel 26 is provided on the inner peripheral side wall of the second channel 102. The second connection channel 26 coincides with the axis of the second rotating shaft 8. A fifth bearing 25 is provided between the outer peripheral side wall of the second rotating shaft 8 and the inner peripheral side wall of the second connection channel 26.

[0067] It should be noted that one end of the second rotating shaft 8 is fixed to the inner ring of the fifth bearing 25 through a lock nut. The outer ring of the fifth bearing 25 is supported on the inner wall of the second connection channel 26. The axial position is restricted by buckling a cap on the end of the second connection channel 26. The cap also has the function of sealing the bearing cavity. The other end of the second rotating shaft 8 is a square head that fits into the square hole of the third bevel gear 12. There is a threaded hole in the middle of the second rotating shaft 8, and it is fixed to the second valve part 7 through a fixing screw.

[0068] In this embodiment, the axial positioning design of the fifth bearing 25 effectively restrains the radial runout of the rotating shaft and avoids seal failure caused by eccentric wear of the valve parts. The anti-friction characteristic of the bearing can significantly reduce the mechanical resistance, enabling the valve to still act sensitively under a small pressure difference, especially adapting to the lubrication degradation condition in the high-altitude and low-temperature environment.

[0069] In one embodiment, the working states of the anti-surge device are the air bleeding state and the air bleeding state, and the default state is the air bleeding state. When the aircraft does not require air bleeding, the anti-surge device is in the air bleeding state under the rotational pre-tightening force of the elastic member 6. At this time, the first valve body assembly is closed and the second valve body assembly is open. When the aircraft opens a certain load valve, a pressure difference is generated between the upstream and downstream of the first valve body assembly. After the pressure difference overcomes the pre-tightening force of the elastic member 6, the first valve member 4 rotates clockwise around the center line, and drives the first bevel gear 10 to rotate through the first rotating shaft 5. The third valve member 9 rotates counterclockwise around the center line and drives the second bevel gear 11 to rotate. The first bevel gear 10 and the second bevel gear 11 jointly drive the third bevel gear 12 to rotate. The third bevel gear 12 drives the second rotating shaft 8 to rotate. The second rotating shaft 8 is connected to the third valve member 9 by a fixing screw. Thus, the third valve member 9 rotates to the closed position, and the working state is switched to the air bleeding state.

[0070] When the aircraft closes all load valves, there is no pressure difference between the upstream and downstream of the first valve body assembly, and the aerodynamic force is 0. Under the rotational pre-tightening force of the elastic member 6, the first bevel gear 10 returns to the initial position under the rotational pre-tightening force of the elastic member 6, thereby driving other gears, the first valve body assembly, and the second valve body assembly to all return to the initial position, and the working state is switched to the air bleeding state.

[0071] According to an embodiment of the present application, on the other hand, an engine is further provided, including an anti-surge device.

[0072] Since the engine includes an anti-surge device and has the same effects as the anti-surge device, it will not be described in detail here.

[0073] Although the embodiments of the present application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present application. Such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. An anti-asthma device, characterized in that: include: A housing (1) is provided with a first channel (101), a second channel (102) and a third channel (103), wherein an output end of the third channel (103) is respectively connected to input ends of the first channel (101) and the second channel (102); A first valve body assembly comprises a first valve member (4), a first rotating shaft (5) and an elastic member (6); the first valve member (4) is connected to the first rotating shaft (5); the first rotating shaft (5) rotates along its circumferential direction; the first valve member (4) is arranged in the first channel (101); the first valve member (4) can block or open the first channel (101) according to the pressure difference change on both sides of the first valve member (4); the elastic member (6) is used to drive the first valve member (4) to have a tendency to move from a state of opening the first channel (101) to a state of blocking the first channel (101); a second valve body assembly, comprising a second valve member (7) and a second rotating shaft (8); the second valve member (7) is connected to the second rotating shaft (8), and the second rotating shaft (8) can rotate along its circumferential direction; the second valve member (7) is arranged in the second channel (102), and the second valve member (7) is suitable for blocking or opening the second channel (102); a transmission assembly, the input end of which is connected to the first rotating shaft (5), and the output end of which is connected to the second rotating shaft (8); Wherein, the first valve component (4) is in a state of blocking the first channel (101), and the second valve component (7) opens the second channel (102); the first valve component (4) is in a state of opening the first channel (101), and the second valve component (7) blocks the second channel (102).

2. The anti-asthma device according to claim 1, characterized in that: The first valve body assembly also includes: The third valve member (9) comprises a second connecting portion (901) and a second blocking portion (902), wherein the first end of the second connecting portion (901) along the axial direction is connected to the second blocking portion (902), the second connecting portion (901) is sleeved on the first rotating shaft (5) and can rotate along the circumferential direction of the first rotating shaft (5), and the second end of the second connecting portion (901) along the axial direction is connected to the input end of the transmission assembly; The first valve member (4) comprises a first connecting portion (401) and a first blocking portion (402); the first connecting portion (401) is connected to the first blocking portion (402) at its first end along the axial direction, and the first connecting portion (401) is connected to the first rotating shaft (5) at its second end along the axial direction; the first blocking portion (402) and the second blocking portion (902) form a disc structure and are adapted to the inner cavity cross-section of the first channel (101) perpendicular to its extension direction.

3. The anti-asthma device according to claim 2, characterized in that: The transmission assembly comprises: A first bevel gear (10) is coaxially arranged with the first rotating shaft (5) and connected to the first rotating shaft (5); A second bevel gear (11) is coaxially arranged with the second connecting portion (901) and connected to a second end of the second connecting portion (901) along its axial direction; The third bevel gear (12) is coaxially arranged with the second rotating shaft (8) and connected to the second rotating shaft (8); the first bevel gear (10) and the second bevel gear (11) are both meshed with the third bevel gear (12).

4. The anti-asthma device according to claim 3, characterized in that: The transmission assembly also includes: The housing (13) is provided with a fourth channel (1301) and a fifth channel (1302) which are connected to each other, and the axes of the fourth channel (1301) and the fifth channel (1302) intersect, the first end of the fourth channel (1301) along its axial direction is connected to the first channel (101), and the first end of the fifth channel (1302) along its axial direction is connected to the second channel (102); The first rotating shaft (5) extends along its first axial end into the fourth channel (1301) and is connected to the first bevel gear (10); the second connecting portion (901) extends along its first axial end into the fourth channel (1301) and is connected to the second bevel gear (11); the second rotating shaft (8) extends along its second axial end into the fifth channel (1302) and is connected to the third bevel gear (12).

5. The anti-asthma device according to claim 4, characterized in that: The transmission assembly also includes: The first mounting seat (14) is configured as a cylindrical structure, passes through the outer side wall of the first channel (101) and is in communication with the first channel (101), a folded edge (15) is provided on the outer side wall of the first mounting seat (14), the folded edge (15) is connected to the outer wall of the shell (13), the inner cavity of the first mounting seat (14) is in communication with the fourth channel (1301), and the second connecting portion (901) and the first rotating shaft (5) pass through the first mounting seat (14); A first bearing (16) is arranged between the outer side wall of the second connecting portion (901) and the inner side wall of the first mounting seat (14); The second mounting seat (17) comprises a connected limiting portion (1701) and a receiving portion (1702), both of which are arranged as a cylindrical structure, and the axes of the limiting portion (1701) and the receiving portion (1702) coincide with each other, the receiving portion (1702) is relatively fixed to the inner wall of the fourth channel (1301), the outer side wall of the receiving portion (1702) is provided with a notch, the first bevel gear (10) is located in the receiving portion (1702), and the first bevel gear (10) extends out of the notch and meshes with the third bevel gear (12), and the second connecting portion (901) and the first rotating shaft (5) pass through the limiting portion (1701); The second bearing (18) is arranged between the outer side wall of the second connecting portion (901) and the inner side wall of the limiting portion (1701), and the first bevel gear (10) is located between the first mounting seat (14) and the second mounting seat (17).

6. The anti-asthma device according to claim 5, characterized in that: A pin (19) is provided on the side of the folded edge (15) facing the first bevel gear (10), a collar (20) is provided on the first end of the elastic member (6), the collar (20) is sleeved on the pin (19), and the second end of the elastic member (6) is connected to the first bevel gear (10).

7. The anti-asthma device according to claim 4, characterized in that: The transmission assembly also includes: A third mounting seat (21) is arranged on the inner peripheral side wall of the fifth channel (1302); the third mounting seat (21) is arranged as a cylindrical structure; the third bevel gear (12) passes through the third mounting seat (21) and coincides with the axis of the third mounting seat (21); The third bearing (22) is arranged between the outer peripheral side wall of the third bevel gear (12) and the inner peripheral side wall of the third mounting seat (21).

8. The anti-asthma device according to claim 2, characterized in that: Also includes: A fourth bearing (23), a first connecting channel (24) is arranged on the inner peripheral side wall of the first channel (101), the first connecting channel (24) coincides with the axis of the first connecting portion (401), and the fourth bearing (23) is arranged between the outer peripheral side wall of the second end of the first connecting portion (401) along its axial direction and the inner peripheral side wall of the first connecting channel (24).

9. The anti-asthma device according to claim 1, characterized in that: Also includes: A fifth bearing (25), a second connecting channel (26) is arranged on the inner peripheral side wall of the second channel (102), the second connecting channel (26) coincides with the axis of the second rotating shaft (8), and the fifth bearing (25) is arranged between the outer peripheral side wall of the second rotating shaft (8) and the inner peripheral side wall of the second connecting channel (26).

10. An engine, characterized in that: include: The anti-stomach device according to any one of claims 1 to 9.

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