Foreign matter intercepting device for air inlet of turbojet engine

Abstract

The invention belongs to the technical field of turbojet engines, and discloses a turbojet engine air inlet foreign matter intercepting device which comprises an intercepting net, the intercepting net covers an air inlet of a turbojet engine in an intercepting mode, the intercepting net comprises a pretreatment layer and a filtering assembly which are designed in a layered mode, and the pretreatment layer and the filtering assembly are arranged in the air inlet direction; the interception frame is arranged on the side, away from the air inlet, of the pretreatment layer, the pretreatment layer is attached to the inner wall face of the interception frame, and a starting motor used for starting the turbojet engine is installed on the interception frame; the cleaning frame is in transmission connection with a cleaning motor installed on the intercepting frame, the cleaning frame is matched with the pretreatment layer, the cleaning frame and the outer side face of the pretreatment layer are arranged in a sliding mode, and foreign matter on the surface of the pretreatment layer is cleaned. The device is compact in structure and convenient to use, external foreign matter can be effectively prevented from entering the turbojet engine, meanwhile, the intercepted foreign matter can be cleaned, engine performance reduction and even damage caused by the foreign matter are avoided, and the safety of the turbojet engine is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of turbojet engines, and in particular relates to a foreign matter interception device at an air inlet of a turbojet engine. Background Art

[0002] In the aviation industry, turbojet engines are the main power source for aircraft, and their performance and reliability are directly related to flight safety. The air intake of a turbojet engine is the key part where air enters the engine. Once foreign matter (such as birds, dust, hail, etc.) is sucked in, it will not only affect the working efficiency of the engine, but in serious cases it may also cause engine damage or even flight accidents.

[0003] In the existing technology, there is no device designed specifically for intercepting foreign objects at the air intake of a turbojet engine. It only uses a metal mesh or grille as a preliminary pretreatment layer to block the entry of foreign objects. Although this method can reduce the entry of large foreign objects, it is not enough to intercept small impurities. Reducing the aperture of the metal mesh or grille will reduce the smoothness of the air intake, making it difficult to balance the air permeability and interception efficiency. Too small an aperture can easily lead to increased air flow resistance, affecting engine performance. At the same time, after long-term use, the metal mesh or grille is easy to clog and difficult to clean, and the maintenance cost is high. In addition, for some lightweight and high-speed foreign objects, the interception effect is limited and cannot be achieved.

[0004] Therefore, the present application designs a foreign object interception device for the air intake of a turbojet engine to solve the above-mentioned technical problems. Summary of the invention

[0005] In order to solve the above technical problems, the present invention proposes a foreign object interception device for the air intake of a turbojet engine to solve the problem that when the turbojet engine is running, foreign objects cover or directly enter the engine air intake, causing damage to the internal components of the engine.

[0006] To achieve the above object, the present invention provides a foreign body interception device for an air inlet of a turbojet engine, comprising:

[0007] An interception net, wherein the interception net interception cover is arranged at the air inlet of the turbojet engine, and the interception net comprises a pretreatment layer and a filter assembly in a layered design, wherein the pretreatment layer and the filter assembly are arranged along the air inlet direction;

[0008] An interception frame, the interception frame is arranged on a side of the pretreatment layer away from the air inlet, the pretreatment layer is attached to the inner wall surface of the interception frame, and a starter motor for starting the turbojet engine is installed on the interception frame;

[0009] A cleaning frame is drivingly connected to a cleaning motor installed on the intercepting frame, the cleaning frame is adapted to the pretreatment layer, the cleaning frame is slidably arranged on the outer side surface of the pretreatment layer, and cleans foreign matter on the surface of the pretreatment layer.

[0010] Preferably, the pretreatment layer is arranged in an arc shape, and the pretreatment layer protrudes in a direction away from the air inlet.

[0011] Preferably, the filter assembly comprises a main intercepting layer and a filter layer which are arranged in layers, the main intercepting layer is arranged between the filter layer and the pretreatment layer, and the main intercepting layer and the filter layer are adapted to the pretreatment layer.

[0012] Preferably, a connecting groove is provided on the cleaning rack, a sliding block is slidably arranged in the connecting groove, and the sliding block is drivingly connected to a movable component arranged on the cleaning rack; a plurality of cleaning brushes are arranged on the sliding block, and the cleaning brushes are in sliding contact with the surface of the pretreatment layer.

[0013] Preferably, the movable component includes a driving groove opened on the cleaning frame, a rotating block is rotatably connected in the driving groove, the rotating block is transmission-connected to an eccentric wheel through a connecting rod, and the eccentric wheel is transmission-connected to a force-bearing frame embedded in the side wall of the sliding block.

[0014] Preferably, a guide groove is provided on the side wall of the connecting groove, a guide block is slidably connected in the guide groove, the guide block extends out of the guide groove and is fixed to the side wall of the sliding block; a return spring is provided between the guide block and the bottom end of the guide groove.

[0015] Preferably, a plurality of driving rods are arranged in the driving groove, the output ends of the driving rods are drivingly connected to the driving blocks movably arranged in the driving groove, the center of the driving block is slidingly connected to a prismatic driving rod, and the top end of the driving rod is drivingly connected to the bottom end of the rotating block.

[0016] Preferably, the side wall of the driving groove is provided with a plurality of spirally arranged torsion grooves, and a torsion block is slidably connected in the torsion groove. The torsion block extends out of the torsion groove and is fixedly connected to the side wall of the driving block.

[0017] Preferably, a connecting frame is provided on the intercepting frame, and the cleaning motor is fixedly mounted on one end of the connecting frame away from the intercepting frame; a control module is provided in the connecting frame, and the control module is electrically connected to the starting motor and the cleaning motor respectively.

[0018] Preferably, an air volume detection sensor is provided in the filter layer, and the air volume detection sensor is electrically connected to the control module.

[0019] Compared with the prior art, the present invention has the following advantages and technical effects: the present invention discloses a foreign body interception device for the air intake of a turbojet engine. The interception net cover with a multi-layer design is arranged at the air intake position of the turbojet engine, which can effectively intercept foreign bodies from the outside and prevent foreign bodies from clogging the air intake and affecting the power characteristics of the turbojet engine; the interception net is arranged in layers through a pretreatment layer and a filter component. Under the premise of not affecting the air intake performance, the interception of foreign bodies at multiple levels improves the efficiency and success rate of interception, effectively avoids the blockage of the air intake, and is convenient for cleaning; the interception frame is arranged at the air intake position for fixing the interception net, which improves the strength of the interception net and prevents the turbojet engine from being easily damaged when it moves quickly The problem of damage is solved, and the safety is improved; the starting motor is installed on the intercepting frame, and can be used as a power source for starting the turbojet engine, which is convenient for normal use; the output shaft of the cleaning motor on the intercepting frame is connected with the cleaning frame, which can drive the cleaning frame to clean the surface of the pretreatment layer outside the intercepting net. When foreign matter is adhered to the outside of the pretreatment layer and causes the intake volume to change, the control module controls the cleaning motor to start, and drives the cleaning frame to clean the surface of the pretreatment layer to remove the adhered foreign matter, restore the intake volume of the turbojet engine, and ensure that it can provide power normally; after cleaning is completed, the control module controls the cleaning motor to stop, which reduces power consumption and does not affect the power performance of the turbojet engine.

[0020] The invention has a compact structure and is easy to use, and can effectively intercept foreign matter from entering the turbojet engine. At the same time, it can clean the intercepted foreign matter, thereby avoiding engine performance degradation or even damage caused by the foreign matter, and improving the safety of the turbojet engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0022] Figure 1 It is an axial view of the foreign body interception device for the air inlet of a turbojet engine of the present invention;

[0023] Figure 2 It is a schematic diagram of the structure of the foreign body interception device for the air inlet of a turbojet engine according to the present invention;

[0024] Figure 3 For the present invention Figure 2 A partial enlarged view of middle A;

[0025] Figure 4 This is a schematic diagram of the structure of the interception net of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of the sliding block in the second embodiment of the present invention;

[0027] Figure 6 Figure 1 of the present invention Figure 5 A partial enlarged view of B in the middle;

[0028] Figure 7 is a schematic diagram of an eccentric frame of the present invention;

[0029] In the figure: 1. interception net; 2. air inlet; 3. pretreatment layer; 4. interception frame; 5. starting motor; 6. cleaning frame; 7. cleaning motor; 8. main interception layer; 9. filter layer; 10. connecting groove; 11. sliding block; 12. cleaning brush; 13. driving groove; 14. rotating block; 15. connecting rod; 16. eccentric wheel; 17. force frame; 18. guide groove; 19. guide block; 20. reset spring; 21. driving rod; 22. driving block; 23. transmission rod; 24. transmission hole; 25. guide ring; 26. transmission block; 27. torsion groove; 28. torsion block; 29. ​​connecting frame; 30. control module; 31. air volume detection sensor; 32. speed sensor; 33. signal line; 34. support ring; 35. adapter groove; 36. clutch; 37. connecting block; 38. outer shield. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] The TCU of a turbojet engine is a device specifically used to control the working state of the turbojet engine.

[0032] 1. Definition and Function

[0033] TCU is the core control component of the turbojet engine. It is responsible for receiving data from various sensors of the engine, such as temperature, pressure, speed, etc., and accurately adjusting the working state of the engine based on these data and the preset control algorithm. Its main functions include but are not limited to:

[0034] Monitor engine parameters: monitor various operating parameters of the engine in real time to ensure that the engine operates within a safe and stable range.

[0035] Adjust the engine operating status: Based on the monitored data, the TCU will adjust the engine's fuel supply, air flow, etc. to optimize the engine's performance and efficiency.

[0036] Fault diagnosis and protection: TCU also has fault diagnosis function, which can detect and report potential engine problems in time, and take necessary protection measures to prevent the fault from further expanding.

[0037] 2. Structure and control method

[0038] The TCU of a turbojet engine usually contains multiple subsystems and modules, such as sensor interface, data processing unit, control algorithm module, etc. These subsystems and modules work together to achieve precise control of the engine.

[0039] In terms of control methods, TCU usually adopts a closed-loop control system. This system will continuously adjust the control signal according to the deviation between the actual operating state of the engine and the preset target to achieve precise regulation of the engine's operating state.

[0040] 3. Application and Advantages

[0041] TCU is widely used in turbojet engines, especially in aviation, aerospace, military and other fields. Its advantages are mainly reflected in the following aspects:

[0042] Improve engine performance: By precisely controlling parameters such as the engine's fuel supply and air flow, the TCU can significantly improve the engine's power performance and fuel economy.

[0043] Enhance engine reliability: TCU has fault diagnosis and protection functions, which can detect and deal with potential engine problems in a timely manner, thereby improving engine reliability and safety.

[0044] Reduce maintenance costs: By precisely controlling the operating status of the engine, TCU can reduce engine wear and failure rate, thereby reducing maintenance costs and operating costs.

[0045] 4. Development Trend

[0046] With the continuous advancement of technology and the continuous expansion of applications, the TCU of turbojet engines is also constantly developing and improving. The future TCU will be more intelligent, integrated and modular, with stronger fault diagnosis capabilities and higher control accuracy. At the same time, with the continuous development of new energy technologies, TCU will also face more challenges and opportunities to adapt to the needs of new energy turbojet engines.

[0047] In summary, the TCU of a turbojet engine is one of the core components of the engine control system, and is of great significance in improving engine performance, enhancing reliability, and reducing maintenance costs.

[0048] Regarding the clutch of the turbojet engine in this application, its specific principle can refer to the patent named turbojet engine clutch, which includes a clutch body, a shaft sleeve, a return spring, and a rubber ring. A stepped through hole and a wedge block are provided in the clutch body, and a conical sink groove is provided at one end of the clutch body for accommodating the rubber ring. The return spring is arranged at the front end of the stepped through hole, as shown in the matching figure, the shaft sleeve is provided with a through hole matched with the wedge block, and is sleeved in the through hole, and a rubber ring is arranged above the return spring in the conical sink groove of the clutch body, so that the shaft sleeve, the wedge block, and the return spring are enclosed inside. The rubber ring can also play a role in dust and slag prevention, which can improve the service life of the turbojet engine clutch.

[0049] The function of the wedge is: during high-speed rotation, the wedge moves forward under the action of centrifugal force and generates a positive pressure, causing the rubber ring and the front nut to engage, thereby starting the engine.

[0050] The working principle of the invention is as follows: the turbojet engine clutch assembly is installed on the output shaft of the motor. The wedge moves forward under the action of centrifugal force during high-speed rotation and generates a positive pressure to engage the rubber ring and the front nut to achieve the starting purpose. After the speed reaches the set value, the motor stops under the program control of the turbojet engine ECU controller, and the wedge moves back to its original position under the action of the return spring, completing its function of clutch starting the engine.

[0051] At the same time, another invention discloses another kind of micro turbojet engine clutch, which is composed of a shaft sleeve, a clutch wheel, a return spring, a pin, a friction sleeve, and a machine screw.

[0052] The sleeve is composed of a first sleeve body and a second sleeve body. The top of the second sleeve body is connected to the bottom of the first sleeve body, and the first sleeve through hole therein is connected to the second sleeve through hole and is coaxially arranged. The outer diameter of the second sleeve body is larger than the outer diameter of the first sleeve body, and an upper step is formed on the outer side of the first sleeve body, and a lower step is formed on the outer side of the second sleeve body. The sleeve is made of high-strength stainless steel and is machined by lathe, with a surface finish of less than 0.8 and a tolerance of less than 0.05 mm.

[0053] The clutch wheel is composed of a first clutch wheel body and a second clutch wheel body. The top end of the second clutch wheel body is connected to the bottom end of the first clutch wheel body. The first clutch wheel through hole therein is connected to the second clutch wheel through hole and is coaxially arranged. A limiting portion extending toward the center of the first clutch wheel through hole is provided on the inner wall of the first clutch wheel body. The inner wall of the limiting portion forms a first step. At the same time, the inner diameter of the first clutch wheel through hole is smaller than the inner diameter of the second clutch wheel through hole. Therefore, the inner wall of the first clutch wheel body forms a second step, and the inner wall of the second clutch wheel body forms a third step. The clutch wheel is made of high-hardness alloy steel, processed by turning and milling, and the surface is rust-proofed. The inner wall finish is less than 0.8 and the tolerance is less than 0.05 mm.

[0054] The spiral groove is arranged on the first clutch wheel body, the end of the spiral groove is connected to the flat groove, and the surface finish of the inner surface of the groove is less than 0.8.

[0055] A reset spring is provided between the sleeve and the clutch wheel. The reset spring is located between the limiter and the second sleeve body. The reset spring is treated with rust-proof polishing. The pin is inserted from the spiral groove, passes through the second sleeve body and is flush with the surface of the clutch wheel. The machine screw is installed from the second sleeve body to hold the pin. The friction sleeve is installed from the second clutch wheel body. The lower plane of the friction sleeve is 2 mm to 5 mm higher than the lower plane of the clutch wheel.

[0056] During operation, the sleeve rotates axially, and the pin slides in the spiral groove of the clutch wheel, overcoming the elastic force of the return spring and pushing the clutch wheel forward. After the sleeve stops rotating, the clutch wheel is retracted along the spiral groove of the clutch wheel by the return spring and its own inertia.

[0057] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0058] Embodiment 1

[0059] Reference Figure 1-Figure 4 As shown, this embodiment provides a foreign body interception device for an air inlet of a turbojet engine, comprising:

[0060] The interception net 1, the interception cover of the interception net 1 is arranged at the air inlet 2 of the turbojet engine, the interception net 1 comprises a pretreatment layer 3 and a filter assembly in a layered design, and the pretreatment layer 3 and the filter assembly are arranged along the air inlet direction;

[0061] An interception frame 4 is arranged on a side of the pretreatment layer 3 away from the air inlet 2, the pretreatment layer 3 is attached to the inner wall surface of the interception frame 4, and a starter motor 5 for starting the turbojet engine is installed on the interception frame 4;

[0062] The cleaning frame 6 is connected to the cleaning motor 7 installed on the intercepting frame 4, and the cleaning frame 6 is adapted to the pretreatment layer 3. The cleaning frame 6 is slidably arranged with the outer side surface of the pretreatment layer 3 to clean foreign matter on the surface of the pretreatment layer 3.

[0063] The present invention discloses a foreign body interception device for an air inlet 2 of a turbojet engine. A multi-layer interception net 1 is arranged at the air inlet 2 of the turbojet engine, and can effectively intercept foreign bodies from the outside, and prevent the foreign bodies from clogging the air inlet 2 and affecting the power characteristics of the turbojet engine. The interception net 1 is arranged in layers through a pretreatment layer 3 and a filter assembly. Under the premise of not affecting the air intake performance, the interception of foreign bodies at multiple levels improves the efficiency and success rate of interception, effectively avoids the clogging of the air inlet 2, and is convenient for cleaning. An interception frame 4 is arranged at the air inlet 2, and is used to fix the interception net 1, so as to improve the strength of the interception net 1, avoid the problem that the turbojet engine is easily damaged when it moves quickly, and improve the safety. The starting electric The machine 5 is installed on the interception frame 4, which can be used as a power source for starting the turbojet engine, which is convenient for normal use; the output shaft of the cleaning motor 7 on the interception frame 4 is connected to the cleaning frame 6, which can drive the cleaning frame 6 to clean the surface of the pretreatment layer 3 outside the interception net 1. When foreign matter is attached to the outside of the pretreatment layer 3 and causes the air intake to change, the control module 30 controls the cleaning motor 7 to start, drives the cleaning frame 6 to clean the surface of the pretreatment layer 3, removes the attached foreign matter, restores the air intake of the turbojet engine, and ensures that it can provide power normally; after the cleaning is completed, the control module 30 controls the cleaning motor 7 to stop, reduces the power consumption, and does not affect the power performance of the turbojet engine. The present invention has a compact structure, is easy to use, can effectively intercept foreign matter from the outside to enter the turbojet engine, and can clean the intercepted foreign matter at the same time, avoids the engine performance degradation or even damage caused by foreign matter, and improves the safety of the turbojet engine.

[0064] In one embodiment of the present application, a plurality of cleaning brushes 12 are arranged on the cleaning frame 6. The cleaning brushes 12 can be used to brush foreign objects attached to the surface of the interception net 1. The foreign objects can be processed during use without stopping the machine for processing, which is convenient for continuous use.

[0065] In the same embodiment of the present application, the output shaft of the starter motor 5 extends into the air inlet 2 and is connected to the clutch 36 through transmission, and the clutch 36 can be conveniently connected to the starting shaft of the turbojet engine; when working, the starter motor 5 is started and rotates forward, driving the clutch 36 to engage with the starting shaft, and then driving the compressor wheel of the turbojet engine to rotate to achieve compressed air intake; and when the start is completed, the turbojet engine runs stably, and the starter motor 5 is controlled to stop, at which time the clutch 36 is separated from the starting shaft, and the starting shaft does not affect the starter motor 5.

[0066] In one embodiment of the present application, the output shaft of the cleaning motor 7 is drivingly connected to a connecting block 37 , and the end of the cleaning frame 6 is fixedly mounted on the connecting block 37 .

[0067] In one embodiment of the present application, the clutch 36 is a conventional component of a turbojet engine, and those skilled in the art are aware of its operating principle and method, which will not be described in detail here.

[0068] In a further optimized solution, the pretreatment layer 3 is arranged in an arc shape, and the pretreatment layer 3 bulges away from the air inlet 2. The interception net 1 is arranged to be a convex surface convex backward, so that the outer wall of the pretreatment layer 3 is an arc surface, which can intercept most foreign objects and slide them away to avoid the accumulation of foreign objects.

[0069] In one embodiment of the present application, the pretreatment layer 3 is made of high-strength, high-permeability fiber material. After large-volume foreign objects hit the pretreatment layer 3, they are bounced off and diffused around, which is used to initially block larger foreign objects and effectively prevent the accumulation of foreign objects from causing air intake obstruction.

[0070] Further optimization scheme, the filter assembly includes a main interception layer 8 and a filter layer 9 arranged in layers, the main interception layer 8 is arranged between the filter layer 9 and the pretreatment layer 3, and the main interception layer 8 and the filter layer 9 are adapted to the pretreatment layer 3. The main interception layer 8 and the filter layer 9 are arranged in a close relationship along the air intake direction, and the pore size of the main interception layer 8 and the filter layer 9 is gradually reduced to achieve layered interception of foreign matter; the design of the pretreatment layer 3, the main interception layer 8 and the filter layer 9 improves the interception ability of foreign matter without affecting the air intake performance of the turbojet engine, improves the cleanliness of the intake, and facilitates the reusability of the turbojet engine.

[0071] In one embodiment of the present application, the main interception layer 8 and the filter layer 9 are both made of existing materials that do not affect the air intake performance. Those skilled in the art can select appropriate materials according to actual needs, which will not be described in detail here.

[0072] Further optimization scheme, a connecting frame 29 is provided on the intercepting frame 4, and the cleaning motor 7 is fixedly installed at the end of the connecting frame 29 away from the intercepting frame 4; a control module 30 is provided in the connecting frame 29, and the control module 30 is electrically connected to the starting motor 5 and the cleaning motor 7 respectively. The connecting frame 29 is installed on the intercepting frame 4, and the connecting frame 29 covers the starting motor 5 to improve the safety of the starting motor 5; the cleaning motor 7 is installed at the end of the connecting frame 29 away from the starting motor 5, and the output shaft of the cleaning motor 7 drives the cleaning frame 6 installed on the connecting block 37 through the connecting block 37 of the transmission connection, so that the cleaning frame 6 can clean the outer wall of the pretreatment layer 3; the control module 30 is arranged on the connecting frame 29, and is electrically connected to the starting motor 5 and the cleaning motor 7 through the signal line 33 to control the operation of the equipment.

[0073] In a further optimized solution, an air volume detection sensor 31 is provided in the filter layer 9, and the air volume detection sensor 31 is electrically connected to the control module 30. The air volume detection sensor 31 in the air inlet 2 is used to detect the air volume of the air inlet 2. After the parameter is fed back to the control module 30, the control module 30 controls the cleaning motor 7 according to the change of the air volume, and drives the cleaning frame 6.

[0074] In one embodiment of the present application, the control module 30 is electrically connected to a rotation speed sensor 32 disposed inside the turbojet engine, which is used in conjunction with an air volume detection sensor 31 to indicate that the air inlet 2 is blocked by an object.

[0075] In one embodiment of the present application, the control module 30 may be a TCU of a turbojet engine, and the operation of the cleaning motor 7 can be controlled by simply providing a corresponding logic module on the existing TCU.

[0076] In one embodiment of the present application, a support ring 34 is provided on the outer shield 38 of the turbojet engine, and the end of the cleaning frame 6 is slidably connected to the support ring 34 through an adapting groove 35 adapted to the support ring 34, thereby improving the stability of the cleaning frame 6.

[0077] In one embodiment of the present application, the control module 30 is connected to various components in the turbojet engine through a plurality of signal lines 33 to facilitate the control of the operation of the turbojet engine.

[0078] Working process:

[0079] An air volume detection sensor 31 is installed in the air inlet 2 and is used together with a speed sensor 32. When the detected air volume is abnormal, it means that the air inlet 2 is blocked by foreign matter. At this time, the set program is activated, and the control module 30 controls the cleaning motor 7 to drive the cleaning frame 6 to rotate to remove the intercepted foreign matter. During cleaning, the air volume detection sensor 31 monitors in real time. When the air volume is normal, the cleaning motor 7 and the cleaning frame 6 stop working.

[0080] Embodiment 2

[0081] Reference Figure 5-Figure 7 As shown, the difference between this embodiment and embodiment 1 is that a connection groove 10 is provided on the cleaning frame 6, a sliding block 11 is slidably provided in the connection groove 10, and the sliding block 11 is transmission-connected with the movable component provided on the cleaning frame 6; a plurality of cleaning brushes 12 are provided on the sliding block 11, and the cleaning brushes 12 are in sliding contact with the surface of the pre-processed layer 3. The cleaning brushes 12 are provided on the sliding block 11, and the sliding block 11 is lifted and lowered in the connection groove 10 under the drive of the movable component, so that the cleaning brushes 12 are close to or away from the pre-processed layer 3. At the same time, in the process of cleaning the surface of the pre-processed layer 3, the cleaning force of the cleaning brush 12 is adjusted to further improve the cleaning efficiency and cleaning effect.

[0082] Further optimizing the scheme, the movable component includes a driving groove 13 provided on the cleaning frame 6, a rotating block 14 is rotatably connected in the driving groove 13, the rotating block 14 is connected to the eccentric wheel 16 through the connecting rod 15, and the eccentric wheel 16 is connected to the force frame 17 embedded in the side wall of the sliding block 11. The rotating block 14 rotates in the driving groove 13, so that the rotating block 14 can drive the eccentric wheel 16 to rotate within the range of the force frame 17 through the connecting rod 15, and then drive the sliding block 11 to slide back and forth through the action of the eccentric wheel 16 and the force frame 17, so as to adjust the cleaning force of the cleaning brush 12.

[0083] Further optimization scheme, the side wall of the connecting groove 10 is provided with a guide groove 18, and a guide block 19 is slidably connected in the guide groove 18, and the guide block 19 extends out of the guide groove 18 and is fixed to the side wall of the sliding block 11; a return spring 20 is arranged between the guide block 19 and the bottom end of the guide groove 18. The design of the guide groove 18 and the guide block 19 improves the stability of the sliding block 11, and at the same time limits the sliding block 11 to avoid excessive movement; the return spring 20 between the guide block 19 and the guide groove 18 can assist the guide block 19 in resetting, and can also improve the flexibility of the guide block 19 in the guide groove 18 to avoid getting stuck.

[0084] A further optimized solution is that a plurality of driving rods 21 are arranged in the driving groove 13, and the output end of the driving rod 21 is transmission-connected to a driving block 22 movably arranged in the driving groove 13, and a prismatic driving rod 23 is slidingly connected to the center of the driving block 22, and the top end of the driving rod 23 is transmission-connected to the bottom end of the rotating block 14; a plurality of spirally arranged torsion grooves 27 are opened on the side wall of the driving groove 13, and a torsion block 28 is slidingly connected in the torsion groove 27, and the torsion block 28 extends out of the torsion groove 27 and is fixed to the side wall of the driving block 22. A transmission block 26 is provided at the top end of the driving rod 21, and the transmission block 26 is connected to the guide ring 25 provided at the bottom end of the driving block 22; and the driving block 22 can rotate when the driving rod 21 is extended and retracted to drive the driving block 22 to slide through the action of the torsion block 28 and the torsion groove 27 provided on the side wall of the driving groove 13; and the prismatic transmission rod 23 passes through the transmission hole 24 on the driving rod 21, which can drive the rotating block 14 to rotate, thereby driving the eccentric wheel 16.

[0085] In one embodiment of the present application, the cross-sections of the transmission rod 23 and the transmission hole 24 are polygonal, so that the transmission rod 23 can rotate together with the driving block 22, and the two can slide relative to each other, but cannot rotate relative to each other, thereby ensuring the transmission of power.

[0086] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0087] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A foreign body interception device for a turbojet engine air inlet, characterized in that: include: An interception net (1), wherein an interception cover of the interception net (1) is arranged at an air inlet (2) of a turbojet engine, wherein the interception net (1) comprises a pretreatment layer (3) and a filter assembly in a layered design, wherein the pretreatment layer (3) and the filter assembly are arranged along an air inlet direction; An interception frame (4), the interception frame (4) being arranged on a side of the pretreatment layer (3) away from the air inlet (2), the pretreatment layer (3) being attached to an inner wall surface of the interception frame (4), and a starter motor (5) for starting the turbojet engine being mounted on the interception frame (4); A cleaning frame (6), the cleaning frame (6) is drivingly connected to a cleaning motor (7) installed on the intercepting frame (4), the cleaning frame (6) is adapted to the pre-treatment layer (3), and the cleaning frame (6) is slidably arranged on the outer side surface of the pre-treatment layer (3) to clean foreign matter on the surface of the pre-treatment layer (3).

2. The foreign body interception device for the turbojet engine air inlet according to claim 1, characterized in that: The pretreatment layer (3) is arranged in an arc shape, and the pretreatment layer (3) protrudes in a direction away from the air inlet (2).

3. The foreign body interception device for the turbojet engine air inlet according to claim 2 is characterized in that: The filter assembly comprises a main interception layer (8) and a filter layer (9) arranged in layers, wherein the main interception layer (8) is arranged between the filter layer (9) and the pretreatment layer (3), and the main interception layer (8) and the filter layer (9) are adapted to the pretreatment layer (3).

4. The foreign body interception device for the turbojet engine air inlet according to claim 1, characterized in that: The cleaning frame (6) is provided with a connecting groove (10), a sliding block (11) is slidably arranged in the connecting groove (10), and the sliding block (11) is drivingly connected to a movable component arranged on the cleaning frame (6); a plurality of cleaning brushes (12) are arranged on the sliding block (11), and the cleaning brushes (12) are in sliding contact with the surface of the pretreatment layer (3).

5. The foreign body interception device for the turbojet engine air inlet according to claim 4, characterized in that: The movable component comprises a driving groove (13) provided on the cleaning frame (6), a rotating block (14) being rotatably connected in the driving groove (13), the rotating block (14) being transmission-connected to an eccentric wheel (16) via a connecting rod (15), and the eccentric wheel (16) being transmission-connected to a force-bearing frame (17) embedded in the side wall of the sliding block (11).

6. The foreign body interception device for the turbojet engine air inlet according to claim 5, characterized in that: A guide groove (18) is provided on the side wall of the connecting groove (10), a guide block (19) is slidably connected in the guide groove (18), the guide block (19) extends out of the guide groove (18) and is fixedly connected to the side wall of the sliding block (11); a return spring (20) is provided between the guide block (19) and the bottom end of the guide groove (18).

7. The foreign body interception device for the turbojet engine air inlet according to claim 5, characterized in that: A plurality of driving rods (21) are arranged in the driving groove (13); the output ends of the driving rods (21) are drivingly connected to a driving block (22) movably arranged in the driving groove (13); a prismatic driving rod (23) is slidably connected to the center of the driving block (22); and the top end of the driving rod (23) is drivingly connected to the bottom end of the rotating block (14).

8. The foreign body interception device for the turbojet engine air inlet according to claim 7, characterized in that: The side wall of the driving groove (13) is provided with a plurality of spirally arranged torsion grooves (27), and a torsion block (28) is slidably connected in the torsion groove (27). The torsion block (28) extends out of the torsion groove (27) and is fixedly connected to the side wall of the driving block (22).

9. The foreign body interception device for the turbojet engine air inlet according to claim 3, characterized in that: The intercepting frame (4) is provided with a connecting frame (29), and the cleaning motor (7) is fixedly mounted on one end of the connecting frame (29) away from the intercepting frame (4); a control module (30) is provided in the connecting frame (29), and the control module (30) is electrically connected to the starting motor (5) and the cleaning motor (7) respectively.

10. The foreign body interception device for the turbojet engine air inlet according to claim 9, characterized in that: An air volume detection sensor (31) is provided in the filter layer (9), and the air volume detection sensor (31) is electrically connected to the control module (30).

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