CN218718330U

CN218718330U - Dustproof clutch of starting motor of micro turbojet engine

Info

Publication number: CN218718330U
Application number: CN202222689010.3U
Authority: CN
Inventors: 马库斯·齐普勒; 张珅; 高宏伟
Original assignee: Suzhou Kaide Aviation Technology Co ltd
Current assignee: Suzhou Kaide Aviation Technology Co ltd
Priority date: 2022-10-12
Filing date: 2022-10-12
Publication date: 2023-03-24
Anticipated expiration: 2032-10-12

Abstract

The utility model relates to a miniature turbojet engine starting motor dustproof clutch, which comprises a clutch shaft, a clutch shaft sleeve, a spiral groove and a driving pin, wherein the clutch shaft sleeve is fixedly provided with an outer cylinder sleeve, one end of the outer cylinder sleeve is fixedly provided with a friction ring, and a compressor nut in the turbojet engine is matched with the friction ring; the clutch shaft is provided with at least one reset magnet for resetting the clutch shaft sleeve, and the clutch shaft sleeve or the outer cylinder sleeve is made of a metal material matched with the reset magnet. Through the structure, the torque when the motor is started can effectively prevent external dirt from entering the rotating part of the clutch, and the risk of clutch failure is reduced; the radial vibration of the rotor caused at the moment of connection can be effectively avoided, the working of the rotor and the bearing is protected to a certain extent, and the service life of the rotor and the bearing is prolonged; the clutch is ensured to be in a correct position when not in use, so as to avoid damage to the starting motor.

Description

Dustproof clutch of starting motor of micro turbojet engine

Technical Field

The utility model belongs to the technical field of turbojet engine technique and specifically relates to a miniature turbojet engine starter motor clutch that prevents dust.

Background

The starting of the micro turbojet engine requires a starting motor to drive a clutch so as to drive a rotor to move, so that compressed air enters a combustion chamber and the ignition operation of the engine is carried out at a specific rotating speed. After the ignition is successful, the motor drives the rotor to gradually increase the rotating speed, after the rotating speed reaches a certain rotating speed, the motor is started to stop working, the clutch retracts to be separated from the rotor, and the rotor keeps self-running through partial energy generated after fuel is combusted.

In the starting motor clutch generally used in the prior art, a guide pin is arranged in a spiral groove outer sleeve, and the guide pin can freely move in the spiral groove outer sleeve. However, in the actual use process, due to the influence of the use environment of the engine, sand or soil particles are often attached to the air inlet end, once the sand or soil particles are attached to the guide groove, the start of the engine is influenced, and the starting motor is seriously damaged.

Because the attachment of sand and soil particles has uncertainty, if the clutch is in a throwing-out state, small particles enter the guide groove and are attached in the guide groove, and the clutch cannot return, so that the clutch is always in the throwing-out state. After the ignition is successful, the clutch still contacts with the rotor of the engine and keeps synchronous rotation. After the engine is started, the rotating speed of the rotor is continuously increased to more than 10 thousands of revolutions. At this time, the starter motor will passively rotate with overload by the rotor of the engine, and the reverse current with high stroke causes the damage of the starter motor. In severe cases, the electronic control unit of the whole engine is affected, and the engine cannot be normally used.

Disclosure of Invention

The utility model aims to solve the technical problem that a can prevent effectively that external dirt from getting into clutch rotating part, reduce the miniature turbojet engine starter motor clutch of the malfunctioning risk of clutch is provided.

The utility model provides a technical scheme that its technical problem adopted is: a dustproof clutch for a starting motor of a micro turbojet engine comprises a clutch shaft connected with the starting motor, a clutch shaft sleeve sleeved on the clutch shaft, a spiral groove arranged on the clutch shaft sleeve and a driving pin arranged on the clutch shaft, wherein an outer cylinder sleeve is fixedly arranged on the clutch shaft sleeve, a friction ring is fixed at one end of the outer cylinder sleeve, and a compressor nut in the turbojet engine is matched with the friction ring; the clutch shaft is provided with at least one reset magnet for resetting the clutch shaft sleeve, and the clutch shaft sleeve or the outer cylinder sleeve is made of a metal material matched with the reset magnet.

More specifically, the friction ring is a rubber ring.

Further specifically, a circular truncated cone is formed upwards on the compressor nut, the circular truncated cone is upwards inserted into the inner ring of the rubber ring, and the circular truncated cone and the rubber ring are in matched contact to generate friction force to drive the compressor nut to rotate.

Further specifically, the contact surface of the circular truncated cone and the rubber ring is completely attached.

More specifically, at least one spiral groove is formed.

More specifically, the two spiral grooves are arranged oppositely, the driving pin penetrates through the clutch shaft, and two end parts of the driving pin are respectively inserted into different spiral grooves in a one-to-one correspondence mode.

Further specifically, a partition plate is arranged in the outer cylinder sleeve, a positioning cavity is formed on one side, close to the nut, of the partition plate, and the friction ring is arranged in the positioning cavity.

Further specifically, a positioning groove is formed in one side, close to the motor, of the outer cylinder sleeve, a positioning ring is arranged on the outer side of the topmost end of the clutch shaft sleeve, and the positioning groove is matched with the positioning ring.

More specifically, at least one of the reset magnets is arranged on one side of the axis of the clutch shaft.

More specifically, a limit plate is arranged on the clutch shaft.

The beneficial effects of the utility model are that: through the structural design of the outer cylinder sleeve, the clutch shaft sleeve and the clutch shaft sleeve, the influence of dirt or dust on the work of the engine starting motor can be effectively prevented, the probability of the engine failure is reduced, and the reliability of the engine is improved. The outer cylinder sleeve of the clutch is forcibly pulled back to a return state under the action of magnetic force, so that the clutch is ensured to be in a rest position when not used, and the starting motor is prevented from being damaged. The engine starting method has the advantages that the engine starting success rate is guaranteed, meanwhile, the maintenance period of the engine can be effectively prolonged, the overall reliability and starting performance of the engine are improved, the engine starting method is low in relative cost and high in reliability, and the engine starting method can be widely used in various products including micro turbojet engines.

Drawings

Fig. 1 is a schematic structural view of the combination of the utility model with a starting motor and a compressor nut;

FIG. 2 is a schematic view of the clutch according to the present invention;

FIG. 3 is a schematic view of the structure of the outer cylinder liner of the present invention 1;

fig. 4 is a schematic diagram of the structure of the outer cylinder liner of the present invention 2.

In the figure: 1. a clutch shaft; 11. a reset magnet; 12. a limiting plate; 2. a clutch hub; 21. a helical groove; 22. a positioning ring; 3. an outer cylinder liner; 31. a partition plate; 32. positioning a groove; 4. a compressor nut; 5. a drive pin; 6. a rubber ring; 7. and starting the motor.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but 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 thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

As shown in fig. 1-4, the dust-proof clutch for the starting motor of the micro turbojet engine comprises a clutch shaft 1 connected with a starting motor 7, a clutch shaft sleeve 2 sleeved on the clutch shaft 1, a spiral groove 21 arranged on the clutch shaft sleeve 2 and a driving pin 5 arranged on the clutch shaft 1, wherein an outer cylinder sleeve 3 is fixedly arranged on the clutch shaft sleeve 2, a friction ring is fixed at one end of the outer cylinder sleeve 3, and a compressor nut 4 in the turbojet engine is matched with the friction ring; the clutch shaft 1 is provided with at least one reset magnet 11 for resetting the clutch shaft sleeve 2, and the clutch shaft sleeve 2 or the outer cylinder sleeve 3 is made of a metal material matched with the reset magnet 11; in the embodiment, the starting motor 7 is started and drives the clutch shaft 1 to rotate, the rotation of the clutch shaft 1 drives the driving pin 5, the driving pin 5 pushes the clutch shaft sleeve 2 and the outer cylinder sleeve 3 to rotate, when the rotation speed is faster and faster, the clutch shaft sleeve 2 and the outer cylinder sleeve 3 can rotate relative to the clutch shaft 1 under the action of centrifugal force, the centrifugal force overcomes the force of the reset magnet 11 on the clutch shaft sleeve 2, the driving pin 5 slides in the spiral groove 21 until the driving pin 5 slides to the other end of the spiral groove 21, a friction ring in the outer cylinder sleeve 3 is completely matched with a circular truncated cone on the compressor nut 4, and the compressor nut 4 is driven to rotate by the friction force to realize the starting of the engine; after the engine is started, the rotor can rotate autonomously, the starting motor 7 is not required to be driven, the starting motor 7 can be turned off at the moment, the speed of the starting motor 7 is reduced, the speed of the clutch shaft 1 is reduced, the centrifugal force borne by the clutch shaft sleeve 2 and the outer cylinder sleeve 3 is reduced, when the centrifugal force is smaller than the force of the reset magnet 11 acting on the clutch shaft sleeve 2, the reset magnet 11 enables the clutch shaft sleeve 2 to drive the outer cylinder sleeve 3 to move towards the direction away from the compressor nut 4, the friction ring and the circular truncated cone on the compressor nut 4 start to be separated, meanwhile, the driving pin 5 reversely slides in the spiral groove 21 until the driving pin 5 returns to the position when the starting motor 7 is not started, and the friction ring is completely separated from the compressor nut 4.

The outer cylinder sleeve 3 is used for sheathing the clutch shaft sleeve 2, and the spiral groove 21 and the driving pin 5 in the clutch shaft sleeve 2 can be completely covered, so that less silt or soil particles enter the spiral groove, and the starting motor can be protected.

In the embodiment, the rubber ring 6 has the characteristics of large friction force, lower cost, convenience in replacement and the like, and can be replaced in time when the friction ring is worn or is in other situations; the compressor nut 4 upwards be formed with the round platform, the round platform upwards inserts 6 inner circles of rubber ring, the round platform cooperatees with 6 contacts of rubber ring and produces frictional force and drive compressor nut 4 and rotate, the round platform laminates with 6 contact surfaces of rubber ring completely, and in this embodiment, the round platform that sets up on the compressor nut can cooperate with the rubber ring large tracts of land, can produce sufficient frictional force and drive compressor nut 4 and rotate at the in-process that starts to drive whole rotor and rotate.

In terms of the number of the spiral grooves 21, at least one spiral groove 21 is provided, in this embodiment, two spiral grooves 21 are oppositely arranged, the driving pin 5 penetrates through the clutch shaft 1, two end portions of the driving pin 5 are respectively inserted into different spiral grooves 21 in a one-to-one correspondence manner, here, the torque of the driving pin 5 on the clutch shaft sleeve 2 at the same rotating speed can be increased by arranging the two spiral grooves 21, the clutch shaft sleeve 5 drives the outer cylinder sleeve 3 to rotate, the centrifugal effect is better utilized to enable the outer cylinder sleeve 3 to be thrown out to the maximum position, meanwhile, the outer cylinder sleeve 3 is mechanically connected with the clutch shaft sleeve 2 through threads, no relative movement exists between the clutch shaft sleeve 2 and the outer cylinder sleeve 3 when the outer cylinder sleeve is thrown out, and stable movement can be ensured by arranging the two symmetrical spiral grooves 21 and the two symmetrical extending ends.

The outer cylinder sleeve 3 is equipped with constant head tank 33 near motor one side the clutch shaft sleeve 2 top outside is equipped with the holding ring 22, constant head tank 33 cooperatees with holding ring 22, and in this embodiment, the holding ring 22 on the clutch shaft sleeve 2 and the constant head tank 33 that sets up in the outer cylinder sleeve 3 can carry out a positioning action to between the two, guarantee clutch shaft sleeve 2 and outer cylinder sleeve 3 on same axle center position when installing.

In the present embodiment, at least one reset magnet 11 is provided on one side of the axial center of the clutch shaft 1, and the attraction force of the reset magnet 11 to the outer cylinder liner 3 can be increased by providing the reset magnet 11, and here, since the clutch shaft 1 and the clutch sleeve 2 are in a clearance fit, the recovery is not impossible due to an excessively weak magnetic force at the time of recovery.

A limiting plate is arranged on the clutch shaft 1 along the radial direction and is used for supporting the clutch shaft sleeve 2 and the outer cylinder sleeve 3; a positioning groove is formed in one surface, close to the clutch shaft sleeve 2, of the limiting part, and the reset magnet 11 is arranged in the positioning groove; the positioning grooves are at least two and evenly distributed around the axis of the clutch shaft 1.

The outer cylinder sleeve 3 is internally provided with a partition plate 31, one side of the partition plate 31, which is close to the compressor nut 4, forms a positioning cavity, the friction ring is arranged in the positioning cavity, the rubber ring 6 can be more stably fixed in the outer cylinder sleeve 3 through the arrangement of the partition plate 31, and the rubber ring 3 can be supported in the starting process under the contact force with the compressor nut 4, so that the compressor nut 4 is better sleeved with the rubber ring 6.

In conclusion, the outer cylinder sleeve 3 is matched with the clutch shaft sleeve 2, so that the influence of dirt or dust on the work of the engine starting motor is effectively prevented; the friction force borne by the compressor nut 4 can be effectively transmitted to the rotor end of the engine through the friction action of the rubber ring 6 in the outer cylinder sleeve 3 and the circular truncated cone on the compressor nut 4; the damage caused by the contact of rigid parts at the moment of connection can be effectively avoided, the working of the rotor and the bearing is protected to a certain extent, and the service life of the rotor and the bearing is prolonged; meanwhile, the outer cylinder sleeve 3 is forcibly pulled back to a retreating state under the magnetic force action of the reset magnet 11, so that the clutch is ensured to be in a correct position when not used, and the starting motor 7 is prevented from being damaged.

It is to be emphasized that: the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form, and any simple modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments are all within the scope of the technical solution of the present invention.

Claims

1. A starting motor clutch of a micro turbojet engine comprises a clutch shaft (1) connected with a starting motor (7), a clutch shaft sleeve (2) sleeved on the clutch shaft (1), a spiral groove (21) arranged on the clutch shaft sleeve (2) and a driving pin (5) arranged on the clutch shaft (1), and is characterized in that an outer cylinder sleeve (3) is fixedly arranged on the clutch shaft sleeve (2), a friction ring is fixed at one end of the outer cylinder sleeve (3), and a compressor nut (4) in the turbojet engine is matched with the friction ring; the clutch shaft (1) is provided with at least one reset magnet (11) for resetting the clutch shaft sleeve (2), and the clutch shaft sleeve (2) or the outer cylinder sleeve (3) is made of a metal material matched with the reset magnet (11).

2. The micro turbojet engine starter motor clutch of claim 1 wherein the friction ring is a rubber ring (6).

3. The clutch for the starting motor of the micro turbojet engine according to claim 2, wherein a circular truncated cone is formed upwards on the compressor nut (4), the circular truncated cone is upwards inserted into an inner ring of the rubber ring (6), and the circular truncated cone is in contact with the rubber ring (6) in a matching way to generate friction force to push the compressor nut (4) to rotate.

4. The micro turbojet engine starter motor clutch of claim 3, wherein the contact surface of the circular truncated cone with the rubber ring (6) is completely attached, and the height of the circular truncated cone is greater than or equal to half the height of the rubber ring (6).

5. The micro turbojet starter motor clutch of claim 1, wherein at least one of the helical grooves (21) is provided.

6. The clutch for the starting motor of the micro turbojet engine according to claim 5, wherein the two spiral grooves (21) are arranged oppositely, the driving pin (5) penetrates through the clutch shaft (1), and two ends of the driving pin (5) are respectively inserted into different spiral grooves (21) in a one-to-one correspondence manner.

7. The clutch for the starting motor of the micro turbojet engine according to claim 1, wherein a partition plate (31) is arranged in the outer cylinder sleeve (3), a positioning cavity is formed on one side of the partition plate (31) close to the nut, and the friction ring is arranged in the positioning cavity.

8. The micro turbojet engine starting motor clutch according to claim 1, characterized in that a limiting groove is formed in one side of the outer cylinder sleeve (3) close to the motor, a limiting ring is arranged on the outer side of the topmost end of the clutch shaft sleeve (2), and the limiting groove is matched with the limiting ring.

9. The turbojet engine starting motor clutch according to claim 1, characterized in that the reset magnets (11) are at least two and are evenly distributed around the axis of the clutch shaft (1).

10. The turbojet engine starter motor clutch of claim 1, characterized in that a limit plate (12) is provided on the clutch shaft (1).