Starter for aviation training plane

Abstract

The invention relates to the technical field of starters, and discloses a starter for an aviation training plane, which comprises a shell and a rotor structure, the rotor structure comprises a rotating shaft and a rotor assembly which are rotatably connected with the shell, and a heat dissipation structure is arranged between the rotating shaft and the shell. The heat dissipation structure comprises an air passing channel formed in the outer ring wall of the machine shell and a fan arranged outside the machine shell and used for driving air to rapidly pass through the outer surface of the machine shell in the axial direction parallel to the rotating shaft during rotation, and the end, close to the fan, of the rotating shaft penetrates through the machine shell and the fan and is fixedly connected with the fan. According to the starter, the fan is driven to rotate through rotation of the rotating shaft, fast flowing airflow generated by the fan can drive the hot air in the machine shell to be exhausted through the air channel and taken away fast, meanwhile, the hot air in the air channel can be extracted through the ventilation structure, and therefore the hot air in the machine shell can be exhausted through the air channel and taken away fast. Cold air enters the machine shell and the air channel to supplement air, and circulation of air in the machine shell and the rotating shaft is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of starters, and in particular to a starter for an aviation training aircraft. Background Art

[0002] The starter can convert electrical energy into mechanical energy. When the starter is working, heat is generated inside it. The heat dissipation of the starter in the prior art mostly relies on its shell, but the heat dissipation performance of the shell is limited. If the heat cannot be dissipated in time, the service life of the starter will be reduced.

[0003] A Chinese patent with application number 201922313912.5 discloses a heat-dissipating planetary reduction starter casing, including a casing body, the casing body is a cylindrical outer sleeve with openings at both ends, the front end cover and the rear end cover are respectively arranged at the front and rear ends of the outer sleeve, the ventilation and cooling assembly is arranged on the side wall of the outer sleeve, the casing body is provided with a stator, a rotor and a starter shaft, the stator and the rotor are arranged in the outer sleeve, the stator is arranged on the outside of the rotor, the rotor is arranged at the central axis of the outer sleeve, the starter shaft concentrically passes through the front end cover and the rear end cover, and a ventilation fan is rotatably arranged in the rear end cover, the ventilation and cooling assembly includes a micro suction pump, a micro blowing pump and a cooling pipe, the micro suction pump and the micro blowing pump are relatively arranged on the outer side wall of the outer sleeve, the cooling pipe is respectively arranged at the blowing port end and the suction port end of the micro blowing pump, and the cooling pipe passes through the side wall of the outer sleeve.

[0004] In the above scheme, the micro air pump introduces external cold air into the outer sleeve through the cooling pipe. The cold air heats up after heat exchange with the stator and rotor in the casing, and is discharged outward under the suction of the micro air pump.

[0005] However, the exchange of gas flow inside and outside the starter casing requires the simultaneous operation of a micro-blowing pump and a micro-suction pump, that is, an additional drive device is required for the exchange of gas flow inside and outside the starter casing. This increases the cost and generates additional heat when the drive device is running, which is not conducive to the heat dissipation of the starter. In addition, the flow of air inside the casing can only achieve rapid heat exchange on the outer surface of the rotor, and the heat inside the rotor cannot be quickly discharged, resulting in poor overall heat dissipation performance. Summary of the invention

[0006] In view of the shortcomings of the prior art that the flow exchange of gas inside and outside the starter casing requires an additional driving device and the heat dissipation effect inside the rotor assembly is poor, the present invention provides a starter for aviation training aircraft that can achieve rapid exchange of gas inside and outside the casing and heat dissipation without an additional driving device and improves the overall heat dissipation performance.

[0007] In order to solve the above technical problems, the present invention is solved by the following technical solutions:

[0008] A starter for an aviation training aircraft comprises a casing and a rotor structure rotatably arranged inside the casing, the rotor structure comprising a rotating shaft rotatably connected to the casing and a rotor assembly sleeved on the rotating shaft, a heat dissipation structure is arranged between the rotating shaft and the casing, the heat dissipation structure comprises an air passage arranged on an outer ring wall of the casing to connect the inside and outside of the casing, and a fan coaxially arranged outside the rear end of the casing to drive air to quickly pass through the outer surface of the casing along the axis of the rotating shaft to drive negative pressure to form in the air passage when rotating, one end of the rotating shaft close to the fan passes through the casing and the fan and is fixedly connected to the fan, an air passage is arranged in the rotating shaft along its own axial direction, and a ventilation structure is arranged on the casing to extract hot air in the air passage when the fan rotates to form negative pressure in the air passage to absorb cold air for air replenishment.

[0009] With the above solution, the fan is fixedly mounted on the shaft and is located outside the rear end of the casing. When the shaft rotates, the airflow formed by the rotation of the fan flows rapidly from the rear end of the casing to the front end of the casing, that is, the wind formed by the fan blows from the rear end of the casing to the front end of the casing, accelerating the heat exchange between the casing and the outside world. In addition, the wind formed by the fan flows rapidly through the outer surface of the casing, the gas flow rate increases and the pressure decreases, and the gas in the air passage is extracted to replenish the pressure, so that a negative pressure is formed inside the air passage, and the hot air in the casing enters the air passage to replenish the pressure, thereby driving the hot air in the casing to be discharged through the air passage and quickly taken away, and the cold air enters the casing to replenish the pressure, realizing the circulation of hot and cold air inside and outside the casing.

[0010] Since the circulation of hot and cold air in the casing is better for heat dissipation on the outer surface of the rotor structure than heat dissipation inside the rotor structure, an air duct is provided inside the rotating shaft, and the wind generated by the fan can also extract the hot air in the air duct through the ventilation structure, and the cold air enters the air duct to replenish the pressure to realize the circulation of hot and cold air inside the rotating shaft, thereby accelerating the heat dissipation inside the rotor structure. The starter does not need to set up an additional driving device, and only uses the rotation of the rotating shaft itself to drive the fan to rotate, thereby reducing costs and heat generation; the fast-flowing airflow generated by the fan can drive the hot air in the casing to be discharged through the air duct and quickly taken away, and at the same time, the hot air in the air duct can be extracted through the ventilation structure, and the cold air enters the casing and the air duct to replenish the air, thereby realizing the circulation of air inside the casing and the rotating shaft, thereby improving the overall heat dissipation performance.

[0011] Preferably, the ventilation structure includes a Venturi tube arranged outside the casing and parallel to the axis of the rotating shaft. The Venturi tube includes an air inlet convergent tube arranged near the fan and having an inner diameter that gradually decreases from a side near the fan to a side far away from the fan, an air outlet divergent tube arranged far away from the fan and having an inner diameter that gradually increases from a side near the fan to a side far away from the fan, and a connecting tube arranged therebetween. An exhaust pipe is arranged outside the casing and has its two ends connected to the connecting pipe and the airway respectively.

[0012] By adopting the above scheme, the airflow generated by the fan enters the Venturi tube from the air intake tapered pipe. Under the action of the Venturi principle and the Bernoulli effect, the airflow velocity flowing through the connecting pipe increases to form a negative pressure, and the hot air in the airway is drawn into the connecting pipe through the exhaust pipe to replenish the pressure, so that a negative pressure is formed in the airway, and the cold air from the outside enters the airway to replenish the pressure, and the cold air flows in the airway to exchange heat with the inside of the rotor structure.

[0013] Preferably, a wind collecting hood arranged on the outside of the fan is fixedly provided at the rear end of the casing, an wind collecting ring mounted on the outside of the casing is fixedly provided on the wind collecting hood, the air passage is located in the wind collecting ring, a second air outlet for connecting the inside and outside of the wind collecting hood is provided between the wind collecting ring and the air passage on the side of the wind collecting hood close to the casing, a first air outlet for sealingly connecting the air inlet tapered pipe with the inside of the wind collecting hood is provided on the side of the wind collecting hood close to the casing, and an air supply hole for connecting the inside and outside of the wind collecting hood is provided on the side of the wind collecting hood away from the casing.

[0014] With the above solution, the wind direction formed by the fan when it rotates is relatively dispersed, and a wind collecting hood is set to concentrate the wind force generated by the fan, so that the wind force generated by the fan is concentrated and blown out from the second air outlet and the first air outlet. The air filling hole ensures the air pressure balance in the wind collecting hood, and the cold air from the outside is sucked into the wind collecting hood and then blown out through the fan, further improving the heat dissipation performance. At the same time, a wind collecting ring fixed on the wind collecting hood is set on the outside of the casing to concentrate the wind blown out of the second air outlet, increase the air flow rate, and improve the efficiency of air circulation in the casing. The setting of the wind collecting ring can also block the air passage and reduce the risk of debris entering the inside of the casing.

[0015] Preferably, the axis of the second air outlet is perpendicular to the axis of the air passage and is located on the same plane.

[0016] By adopting the above solution, the airflow blown out from the second air outlet can be utilized to the maximum extent.

[0017] Preferably, a vent pipe is concentrically fixedly arranged in the air passage, and one end of the vent pipe away from the rotating shaft is located between the casing and the air gathering ring, and the second air outlet is located between the end of the vent pipe away from the rotating shaft and the inner ring wall of the air gathering ring.

[0018] By adopting the above scheme, after the starter is installed, the ventilation pipe is arranged vertically upward, so that the casing and the outside form a chimney effect. Combined with the fast-flowing air on the end face of the ventilation pipe, the speed at which the hot air is discharged from the casing through the ventilation pipe is further accelerated.

[0019] Preferably, at least one group of the air passage, the ventilation pipe and the second air outlet are arranged at intervals around the circumference of the casing, and at least one group of the venturi tube and the exhaust pipe are arranged at intervals around the circumference of the casing.

[0020] By adopting the above scheme, one group is set to realize the circulation of air inside and outside the casing and the shaft; multiple groups are set to improve the circulation efficiency, and when multiple groups are set, after the starter is installed, there is a ventilation pipe set vertically upward.

[0021] Preferably, an air cavity for sealing and rotating connection of the end of the rotating shaft is provided on the side of the air collecting hood away from the casing, and the air cavity is sealed and connected to the air duct and the exhaust pipe respectively.

[0022] With the above solution, since the shaft is in a fast rotating state, in order to ensure the connection between the exhaust pipe and the airway, an air cavity is provided in the wind condenser, and one end of the shaft passing through the fan is sealed and rotatably connected in the air cavity, ensuring the sealed connection between the air cavity and the airway, and the exhaust pipe is sealed and connected to the air cavity, thereby ensuring the connection between the exhaust pipe and the airway when the shaft rotates. In addition, since the fan is located outside the rear end of the casing, the heat dissipation of the rotor structure near the rear end of the casing is better than that of the front end of the casing, so that the hot air is drawn into the air cavity from the rear end of the shaft, and the cold air is drawn in from the front end of the shaft, thereby improving the heat dissipation of the front end of the shaft.

[0023] Preferably, the air passage is arranged on a side of the outer ring wall of the casing close to the fan, and an air intake groove for connecting the inside and outside of the casing is arranged on a side of the casing away from the wind collecting cover.

[0024] With the above solution, since the fan is located outside the rear end of the casing, the heat dissipation of the rotor structure near the rear end of the casing is better than that of the front end of the casing. Therefore, the air passage is arranged on the side of the outer ring wall of the casing close to the fan and the air intake groove is arranged at the front end of the casing. Cold air is drawn in from the front end of the casing and discharged from the air passage near the rear end of the casing, thereby improving the heat dissipation of the front end of the casing.

[0025] Preferably, filters are provided in the air intake groove and the air duct respectively.

[0026] The above solution can reduce the impact of impurities entering the casing through the air intake slot on the components inside the casing; at the same time, it can reduce the accumulation or blockage caused by impurities entering the airway, air cavity, exhaust pipe or venturi tube.

[0027] Due to the adoption of the above technical scheme, the present invention has significant technical effects: there is no need to set up an additional driving device, and only the rotation of the shaft itself is used to drive the fan to rotate, which reduces costs and reduces heat generation; the fast-flowing airflow generated by the fan first cools down the rear end of the casing, and at the same time can drive the hot air in the casing to be discharged through the ventilation pipe and quickly taken away, and drive the hot air in the airway to be drawn into the Venturi tube through the air cavity and the exhaust pipe and quickly taken away, and cold air enters the casing and the airway from the front end of the casing and the shaft respectively to replenish pressure, and exchanges heat with the outside and inside of the rotor structure, thereby realizing the circulation of air inside and outside the casing and the shaft, and increasing the overall heat dissipation performance of the rotor structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of a starter for an aviation training aircraft in an embodiment;

[0029] Figure 2 is a top view of a starter for an aviation training aircraft in an embodiment;

[0030] Figure 3 yes Figure 2 Sectional view at AA in the figure;

[0031] Figure 4 yes Figure 3 The enlarged view of point B in the figure;

[0032] Figure 5 The invention is a disassembly method of a starter for an aviation training aircraft in an embodiment. Figure 1 ;

[0033] Figure 6 The invention is a disassembly method of a starter for an aviation training aircraft in an embodiment. Figure 2 .

[0034] The names of the parts indicated by the numerical labels in the above drawings are as follows: 1. Casing; 2. Rotor structure; 201. Rotating shaft; 202. Rotor assembly; 3. Air passage; 4. Fan; 5. Air duct; 6. Venturi tube; 601. Inlet convergent tube; 602. Outlet divergent tube; 603. Connecting tube; 7. Exhaust pipe; 8. Wind gathering hood; 9. First air outlet; 10. Second air outlet; 11. Wind gathering ring; 12. Ventilation pipe; 13. Air cavity; 14. Air replenishing hole; 15. Inlet slot; 16. Filter. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0036] Example

[0037] A starter for an aviation training aircraft, referring to Figures 1 to 6 , including a casing 1, in which a stator structure and a rotor structure 2 are arranged, the rotor structure 2 includes a rotating shaft 201 coaxially connected to the casing 1 and a rotor assembly 202 arranged on the rotating shaft 201 and cooperating with the stator structure to drive the rotating shaft 201 to rotate. In this embodiment, only the rotating shaft 201 and the casing 1 are improved, and the other components are the same as the structure in the existing starter, which is the prior art, and this scheme does not make improvements, so they are not described here.

[0038] A heat dissipation structure is provided between the rotating shaft 201 and the housing 1. The heat dissipation structure includes an air passage 3 which is provided on the outer ring wall of the housing 1 and penetrates the housing 1 radially to connect the inside and the outside of the housing 1, and the air passage 3 is close to the rear end of the housing 1. The end of the rotating shaft 201 close to the rear end of the housing 1 passes through the housing 1 and is located outside the housing 1, and the rotating shaft 201 is sealed and rotatably connected with the housing 1. A fan 4 is coaxially fixedly sleeved on the rotating shaft 201 located outside the rear end of the housing 1, and the diameter of the circle formed by the fan 4 when rotating is greater than the diameter of the housing 1. When the rotating shaft 201 rotates, the fan 4 rotates accordingly, blowing air toward the housing 1 so that the air on the outer surface of the housing 1 flows rapidly from the rear end of the housing 1 to the front end, driving the hot air inside the housing 1 to be discharged through the air passage 3 and carried away by the rapidly flowing air. An air intake slot 15 is provided at the front end of the housing 1, and cold air enters the housing 1 through the air intake slot 15 for air replenishment. A filter 16 is provided in the air intake slot 15.

[0039] At least one air passage 3 is arranged at intervals around the casing 1. In this embodiment, only one air passage 3 is arranged, and after the starter is installed, the air passage 3 is in a vertical upward state. A vent pipe 12 is arranged in the air passage 3, and the vent pipe 12 is fixedly arranged concentrically with the air passage 3, and one end of the vent pipe 12 away from the rotating shaft 201 is located outside the casing 1. That is, after the starter is installed, the vent pipe 12 is also in a vertical upward state, forming a chimney effect, so that the hot air in the casing 1 is quickly discharged upward through the vent pipe 12, and is quickly taken away from the vent pipe 12 with the help of the negative pressure of the air flow that quickly flows through the upper end surface of the vent pipe 12.

[0040] At the rear end of the housing 1, a wind collecting hood 8 is fixedly provided concentrically and covered on the outside of the fan 4. Since the diameter of the circle formed by the rotation of the fan 4 is larger than the diameter of the housing 1, the diameter of the wind collecting hood 8 is also larger than the diameter of the housing 1. On the side of the wind collecting hood 8 close to the housing 1, a wind collecting ring 11 is fixedly provided concentrically, and the wind collecting ring 11 is sleeved on the outside of the housing 1. The air passage 3 and the vent pipe 12 are located inside the wind collecting ring 11. On the side of the wind collecting hood 8 close to the housing 1, a second air outlet 10 is provided between the inner ring wall of the wind collecting ring 11 and the upper end surface of the vent pipe 12. The axis of the second air outlet 10 is perpendicular to the axis of the air passage 3 and is located on the same plane, so that the airflow formed by the rotation of the fan 4 in the wind collecting hood 8 is concentrated and blown out through the second air outlet 10, the air flow speed on the upper end surface of the vent pipe 12 is faster, and the negative pressure formed is greater, which accelerates the speed of hot air discharged from the housing 1. An air supply hole 14 is provided on the side of the air collecting hood 8 away from the casing 1 to connect the inside and outside of the air collecting hood 8, so as to supply cold air from the outside into the air collecting hood 8, so that the air pressure of the air collecting hood 8 is balanced and the rear end of the casing 1 is cooled.

[0041] An air cavity 13 is provided on the side of the air collecting cover 8 away from the housing 1. One end of the rotating shaft 201 passing through the rear end of the housing 1 is inserted into the air collecting cover 8 and is rotatably connected with the air cavity 13 in a sealed manner. An air passage 5 is provided in the rotating shaft 201 along the axial direction of the rotating shaft 201, that is, the air cavity 13 is connected to the outside through the air passage 5. A venturi tube 6 is integrally provided on the inner ring wall of the air collecting ring 11. The axial direction of the venturi tube 6 is parallel to the axial direction of the housing 1. The venturi tube 6 includes an air inlet converging tube 601 close to the fan 4, an air outlet converging tube 602 away from the fan 4, and a connecting tube 603 provided between the two and connected to the two. The inner diameter of the air inlet converging pipe 601 gradually decreases from the side close to the fan 4 to the side far from the fan 4, the inner diameter of the air outlet diverging pipe 602 gradually increases from the side close to the fan 4 to the side far from the fan 4, and the inner diameter of the connecting pipe 603 remains unchanged and is the same as the minimum inner diameter of the air inlet converging pipe 601 and the air outlet diverging pipe 602. A first air outlet 9 is provided on the side of the air collecting hood 8 close to the housing 1, so that the air inlet converging pipe 601 is sealed and connected with the inside of the air collecting hood 8, that is, the airflow formed by the rotation of the fan 4 in the air collecting hood 8 is concentrated and blown out through the second air outlet 10 and the first air outlet 9. An air extraction pipe 7 is provided on the outside of the housing 1, and its two ends are connected with the connecting pipe 603 and the air cavity 13 respectively. A filter 16 is provided in the air duct 5. At least one group of the venturi tube 6 and the exhaust pipe 7 are arranged at intervals around the casing 1 circumferentially. In this embodiment, the venturi tube 6 and the exhaust pipe 7 are arranged as a group, and after the starter is installed, the venturi tube 6 and the exhaust pipe 7 are located below the casing 1 .

[0042] When the starter is running, the stator structure and the rotor structure 2 generate heat, and the air in the housing 1 and the air duct 5 are exchanged to form hot air. The hot air in the housing 1 is quickly discharged upward through the ventilation pipe 12 under the chimney effect of the ventilation pipe 12, and the cold air is quickly replenished into the housing 1 through the air intake slot 15 to exchange heat with the internal components. At the same time, the rotation of the shaft 201 drives the fan 4 to rotate, and the generated airflow is quickly ejected through the first air outlet 9 and the second air outlet 10. The airflow ejected from the second air outlet 10 flows rapidly from the upper end surface of the ventilation pipe 12 along the axial direction parallel to the housing 1, and quickly takes away the hot air discharged through the ventilation pipe 12. At the same time, the fast-flowing airflow will also form a negative pressure, accelerating the speed of hot air discharge in the housing 1. The airflow ejected from the first air outlet 9 is ejected to the outside through the Venturi tube 6, and a negative pressure is formed in the connecting tube 603, so that the hot air in the air duct 5 is drawn into the connecting tube 603 through the air cavity 13 and the exhaust pipe 7 for pressure replenishment, and is carried away by the fast-flowing airflow in the Venturi tube 6; cold air is replenished from the end of the air duct 5 away from the air cavity 13.

[0043] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A starter for an aviation training aircraft, comprising a housing (1) and a rotor structure (2) rotatably arranged inside the housing (1), the rotor structure (2) comprising a rotating shaft (201) rotatably connected to the housing (1) and a rotor assembly (202) sleeved on the rotating shaft (201), a heat dissipation structure being arranged between the rotating shaft (201) and the housing (1), characterized in that: The heat dissipation structure comprises an air passage (3) arranged on the outer ring wall of the casing (1) so as to connect the inside and the outside of the casing (1), and a fan (4) arranged coaxially with the rotating shaft (201) on the outside of the rear end of the casing (1) and driving air to pass through the outer surface of the casing (1) quickly along the axis of the rotating shaft (201) when rotating so as to drive negative pressure to be formed in the air passage (3); one end of the rotating shaft (201) close to the fan (4) passes through the casing (1) and the fan (4) and is fixedly connected to the fan (4); an air passage (5) is arranged in the rotating shaft (201) along its own axis; and a ventilation structure is arranged on the casing (1) so as to draw hot air in the air passage (5) when the fan (4) rotates so as to form negative pressure in the air passage (5) so as to absorb cold air for air replenishment.

2. The starter for an aviation training aircraft according to claim 1, characterized in that: The ventilation structure comprises a venturi tube (6) arranged outside the casing (1) and parallel to the axis of the rotating shaft (201), the venturi tube (6) comprising an air intake gradually contracting tube (601) arranged close to the fan (4) and having an inner diameter that gradually decreases from a side close to the fan (4) to a side away from the fan (4), an air outlet gradually expanding tube (602) arranged away from the fan (4) and having an inner diameter that gradually increases from a side close to the fan (4) to a side away from the fan (4), and a connecting tube (603) arranged between the two, and an air extraction tube (7) is arranged outside the casing (1) and has two ends that are respectively connected to the connecting tube (603) and the air duct (5).

3. A starter for an aviation training aircraft according to claim 2, characterized in that: A wind collecting hood (8) is fixedly provided at the rear end of the casing (1) and is covered on the outside of the fan (4); a wind collecting ring (11) is fixedly provided on the wind collecting hood (8) and is sleeved on the outside of the casing (1); an air passage (3) is located in the wind collecting ring (11); a second air outlet (10) is provided between the wind collecting ring (11) and the air passage (3) on a side of the wind collecting hood (8) close to the casing (1) so as to connect the inside and outside of the wind collecting hood (8); a first air outlet (9) is provided on a side of the wind collecting hood (8) close to the casing (1) so as to seal and connect the air intake tapered pipe (601) with the inside of the wind collecting hood (8); and an air supply hole (14) is provided on a side of the wind collecting hood (8) away from the casing (1) so as to connect the inside and outside of the wind collecting hood (8).

4. The starter for an aviation training aircraft according to claim 3, characterized in that: The axis of the second air outlet (10) is perpendicular to the axis of the air passage (3) and is located on the same plane.

5. The starter for an aviation training aircraft according to claim 3, characterized in that: A vent pipe is fixedly disposed concentrically in the air passage (3); one end of the vent pipe away from the rotating shaft is located between the housing (1) and the air gathering ring (11); and the second air outlet (10) is located between one end of the vent pipe (12) away from the rotating shaft (201) and the inner ring wall of the air gathering ring (11).

6. The starter for an aviation training aircraft according to claim 5, characterized in that: At least one group of the air passage (3), the ventilation pipe (12) and the second air outlet (10) are arranged at intervals around the casing (1) in the circumferential direction, and at least one group of the venturi tube (6) and the exhaust pipe (7) are arranged at intervals around the casing (1) in the circumferential direction.

7. The starter for an aviation training aircraft according to claim 3, characterized in that: An air cavity (13) for sealing and rotating connection of the end of the rotating shaft (201) is provided on the side of the air collecting cover (8) away from the casing (1), and the air cavity (13) is sealed and connected to the air passage (5) and the air extraction pipe (7) respectively.

8. The starter for an aviation training aircraft according to claim 3, characterized in that: The air passage (3) is arranged on a side of the outer ring wall of the casing (1) close to the fan (4), and an air intake groove (15) for communicating the inside and outside of the casing (1) is arranged on a side of the casing (1) away from the wind collecting cover (8).

9. The starter for an aviation training aircraft according to claim 8, characterized in that: Filter screens (16) are respectively arranged in the air intake groove (15) and the air passage (5).

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