CN113602508B

CN113602508B - Built-in split motor mounting structure for aero-engine

Info

Publication number: CN113602508B
Application number: CN202110971300.4A
Authority: CN
Inventors: 李芳�; 李纪永; 陈亮; 陈溯; 何国忠; 李彬
Original assignee: Sichuan Aerospace Zhongtian Power Equipment Co ltd
Current assignee: Sichuan Aerospace Zhongtian Power Equipment Co ltd
Priority date: 2021-08-23
Filing date: 2021-08-23
Publication date: 2023-05-30
Anticipated expiration: 2041-08-23
Also published as: CN113602508A

Abstract

The invention discloses a built-in split type motor mounting structure for an aeroengine, which relates to the field of aeroengines and solves the problems of unreliable engine starting function, large vibration, large occupied space and complex structure of the engine; the motor stator is connected with the air inlet casing, and the motor rotor is connected with the centrifugal impeller, so that the motor can be ensured to be reliable and the engine starting and power generating work can be completed by controlling the coaxiality of the central hole of the centrifugal impeller, the air inlet casing and the motor stator mounting frame; the air inlet casing is connected with the engine shell, so that when force is transferred to the engine shell, the vibration of the engine can be reduced.

Description

Built-in split motor mounting structure for aero-engine

Technical Field

The invention relates to the technical field of aeroengines, in particular to the technical field of an installation structure of a built-in split motor for an aeroengine.

Background

Engines often require the provision of electric motor apparatus for engine starting and power generation. In general, the motor is connected with the main shaft of the engine through a coupler or a gear transmission device, so that the motor rotor is driven to rotate in a starting stage to realize a starting function; after the engine works normally, the motor is driven by the engine rotor to rotate so as to realize the power generation function. The motor shaft adopting the connection mode needs to be additionally provided with a motor rotor supporting structure, the structure is complex, the system is heavy, the coupler is easy to break down, and the reliability is low. With the increasing stricter requirements of aircraft on engine performance and structure, the problems of unreliable engine starting function, large vibration, large occupied space, complex structure and the like are urgently needed to be solved.

Disclosure of Invention

The invention aims at: in order to solve the technical problems, the invention provides a built-in split motor mounting structure for an aeroengine.

The invention adopts the following technical scheme for realizing the purposes:

the utility model provides an aeroengine is with built-in split type motor mounting structure, includes the cartridge receiver that admits air that is connected with engine casing, and the cartridge receiver that admits air passes through fixing screw fixedly connected with motor stator mounting bracket, is equipped with between motor stator mounting bracket and the cartridge receiver of admitting air and prevents changeing the pin, and motor stator mounting bracket inner contact is equipped with the wedge, and the contact is equipped with motor stator on the outer wall of motor stator mounting bracket, and motor stator outer wall is equipped with motor rotor, centrifugal impeller from inside to outside in proper order.

Further, the motor rotor comprises a motor rotor iron ring which is adhered in the central hole of the centrifugal impeller, a plurality of grooves which are uniformly distributed on the motor rotor iron ring are formed in the motor rotor iron ring, and motor rotor magnet strips are adhered in the grooves.

Further, the motor rotor iron ring is provided with circumferentially distributed heat dissipation holes.

Further, the heat dissipation hole diameter was 2mm.

Further, the motor rotor iron ring is provided with a plurality of fixing keys which are uniformly distributed on the motor rotor iron ring, the hole wall of the central mounting hole of the centrifugal impeller is provided with a fixing groove, and the fixing groove is internally provided with fixing keys.

Further, the centrifugal impeller is provided with a plurality of through holes which are uniformly distributed on the centrifugal impeller.

Further, the diameter of the through hole was 1.5mm.

Further, the air inlet casing comprises a casing shell and a fixed block arranged in the casing shell, a hollow rib plate is arranged between the fixed block and the air inlet casing, a plurality of cable holes which are uniformly distributed on the fixed block are formed in the fixed block, and bolt holes are formed in the fixed block.

Further, the diameter of the cable hole was 4.5mm.

The beneficial effects of the invention are as follows:

1. in the invention, the motor is a split motor, the motor stator is connected with the air inlet casing, the motor rotor is connected with the centrifugal impeller, so that the motor can be ensured to be reliable and complete the engine starting and generating work by controlling the coaxiality of the central hole of the centrifugal impeller, the air inlet casing and the motor stator mounting frame.

2. According to the invention, the motor stator mounting frame and the air inlet casing can be connected by the fixing screw, so that the motor stator mounting frame is prevented from falling off.

3. In the invention, the anti-rotation pin not only connects the motor stator mounting frame with the air inlet casing, but also can axially position the motor stator to prevent the motor stator from rotating circumferentially.

4. In the invention, the wedge-shaped block is arranged in the motor stator mounting frame in a contact manner, so that the wedge-shaped block can bear pretightening force, and the motor stator mounting frame are tightly pressed.

5. In the invention, the motor rotor iron ring is provided with the groove, the motor rotor magnet strip is adhered in the groove, and the groove can ensure the relative axial and circumferential positions of the motor rotor magnet strip.

6. According to the invention, the motor rotor iron ring is provided with the circumferentially distributed heat dissipation holes, so that the motor can be ensured to fully dissipate heat under the condition that the working performance of the centrifugal impeller is not reduced as much as possible.

7. In the invention, the motor rotor iron ring is provided with a plurality of fixed keys which are uniformly distributed on the motor rotor iron ring, so that the motor rotor can be fully ensured not to generate circumferential displacement in the rotation process of the centrifugal impeller.

8. In the invention, the centrifugal impeller is provided with a plurality of through holes which are uniformly distributed on the centrifugal impeller, and the through holes can flow the cold air sucked by the centrifugal impeller into the heat dissipation holes and gaps between the motor stator and the motor rotor through the through holes under the action of pressure difference, and then flow out of the cable holes to play a role in dissipating heat of the motor.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic illustration of the connection of an intake casing to a centrifugal impeller;

FIG. 3 is a schematic view of the centrifugal impeller of FIG. 2 with the centrifugal impeller removed;

FIG. 4 is a schematic illustration of the structure of FIG. 3 with the motor rotor and motor stator removed;

FIG. 5 is a schematic illustration of the connection of a motor stator mounting bracket to a wedge block;

FIG. 6 is a schematic structural view of a centrifugal impeller;

fig. 7 is a schematic structural view of an intake casing;

FIG. 8 is a schematic structural view of a motor rotor;

reference numerals: 11 air inlet casing, 111 casing shell, 112 fixing block, 1121 cable hole, 1122 bolt hole, 113 hollow rib plate, 12 rotation-preventing pin, 13 motor stator mounting frame, 14 fixing screw, 15 centrifugal impeller, 151 fixed slots, 152 through holes, 16 motor rotor iron rings, 161 grooves, 162 fixed keys, 163 radiating holes, 17 motor rotor magnet bars, 18 motor stators, 19 wedge blocks and 20 motor shells.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Example 1

As shown in fig. 1 to 8, the embodiment provides a built-in split motor mounting structure for an aeroengine, which comprises an air inlet casing 11 connected with an engine shell 20, wherein the air inlet casing 11 is fixedly connected with a motor stator mounting frame 13 through a fixing screw 14, an anti-rotation pin 12 is arranged between the motor stator mounting frame 13 and the air inlet casing 11, a wedge block 19 is arranged in contact with the motor stator mounting frame 13, a motor stator 18 is arranged on the outer wall of the motor stator mounting frame 13 in a contact manner, and a motor rotor and a centrifugal impeller 15 are sequentially arranged on the outer wall of the motor stator 18 from inside to outside.

According to the embodiment, the motor rotor is arranged on the centrifugal impeller 15, and the motor stator 18 is arranged on the air inlet casing 11 in a split type installation mode, so that the coaxiality of the central hole of the centrifugal impeller 15, the air inlet casing 11 and the motor stator mounting frame 13 is controlled, the motor can be ensured to be reliable, the engine starting and power generation work can be completed, the motor stator 18 is fixed on the air inlet casing 11 through the fixing bolts, and the air inlet casing 11 is connected with the engine shell 20, so that when force is transferred to the engine shell 20, the engine vibration can be reduced, and the motor is a split type motor, the installation structure is simple compared with a traditional coupling motor, the motor installation in a small space is realized, the length of the engine is effectively shortened, and the vibration of the engine is reduced; the motor stator mounting frame 13 can be connected with the air inlet casing 11 through the fixing screw 14, so that the motor stator mounting frame 13 is prevented from falling off, and on the basis, the anti-rotation pin 12 is arranged between the motor stator mounting frame 13 and the air inlet casing 11, so that the position of the motor mirror mounting frame is reinforced, the motor stator 18 can be axially positioned, and the motor stator is prevented from axially rotating; the motor mirror mounting frame is internally contacted with an oblique block which can bear pretightening force to press the motor stator 18 and the motor stator mounting frame 13.

Specifically, since the centrifugal impeller 15 is a part of the engine rotor, after the motor is supplied with power to drive the engine rotor to run at the ignition speed, the engine supplies oil to start, and when the power of the engine worm wheel is greater than the power of the compressor, the engine is successfully started and the power supply is stopped. And the motor is driven by the engine rotor to rotate, so that the motor gradually has a power generation function for aircraft-mounted equipment, and the higher the engine rotating speed is, the larger the power generation power is.

Example 2

As shown in fig. 1 to 8, on the basis of the first embodiment, the present embodiment provides a motor rotor including a motor rotor iron ring 16 bonded in a center hole of a centrifugal impeller 15, a plurality of grooves 161 uniformly distributed on the motor rotor iron ring 16, and motor rotor magnet bars 17 bonded in the grooves 161.

Further, the motor rotor iron ring 16 is provided with heat dissipation holes 163 distributed in the circumferential direction.

Further, the motor rotor iron ring 16 is provided with a plurality of fixing keys 162 which are uniformly distributed on the motor rotor iron ring, the hole wall of the central mounting hole of the centrifugal impeller 15 is provided with a fixing groove 151, and the fixing key 162 is clamped in the fixing groove 151.

Further, the centrifugal impeller 15 is provided with a plurality of through holes 152 uniformly distributed on itself.

Further, the air inlet casing 11 includes a casing shell 111 and a fixing block 112 disposed in the casing shell 111, a hollow rib plate 113 is disposed between the fixing block 112 and the air inlet casing 11, a plurality of cable holes 1121 uniformly distributed on the fixing block 112 are disposed on the fixing block 112, and bolt holes 1122 are disposed on the fixing block 112.

In the embodiment, the motor rotor iron ring 16 and the motor rotor magnet bar 17 form a motor rotor together, and the motor rotor magnet bar 17 is bonded in the groove 161 of the motor rotor iron ring 16, so that the axial direction and the axial direction relative position of the motor rotor magnet bar 17 are ensured; the fixed key 162 on the electronic rotor iron ring is accommodated in the fixed groove 151, so that the motor rotor is fully ensured not to generate circumferential displacement in the rotation process of the centrifugal impeller 15, and the motor rotor iron ring 16 and the centrifugal impeller 15 are bonded, and the fixed key 162 is also clamped in the fixed groove 151, so that the motor rotor iron ring 16 can be prevented from axially moving; the bolt holes 1122 can be connected with the fixing screws 14 so as to fix the motor stator mounting frame 13, a motor cable can be penetrated into the cable holes 1121, and the hollow rib plates 113 are used for supporting the fixing blocks 112; the centrifugal impeller 15 is provided with a through hole 152 for heat dissipation of a motor, a heat dissipation hole 163 is formed in one circle of a motor rotor iron ring 16, a plurality of cable holes 1121 are formed in the mounting position of a motor stator 18 of the air inlet casing 11, and under the action of pressure difference, cold air sucked by the centrifugal impeller 15 flows into a gap between the heat dissipation hole 163 and the motor stator 18 and the motor rotor through the through hole 152, then flows out of the cable holes 1121 and takes away heat generated by motor operation, so that the effect of heat dissipation of the motor is achieved.

Specifically, since the motor stator 18 is connected with the air inlet casing 11 and the motor rotor is connected with the centrifugal impeller 15, the motor rotor magnet bars 17 are connected with the centrifugal impeller 15, so that the motor can be ensured to be reliable and the engine starting and power generating work can be completed by controlling the coaxiality of the central hole of the centrifugal impeller 15, the air inlet casing 11 and the motor stator mounting frame 13.

Specifically, since the motor rotor magnet bars 17 are bonded in the grooves 161, the portions of the motor rotor iron rings 16 where the grooves 161 are not formed form a flow passage for cool air with the outer wall of the motor stator 18.

Example 3

As shown in fig. 1 to 8, on the basis of the second embodiment, the present embodiment provides the heat dissipation holes 163 having a diameter of 2mm; the diameter of the through hole 152 is 1.5mm; the cable hole 1121 has a diameter of 4.5mm.

In the present embodiment, the heat dissipation holes 163 have a diameter of 2mm, the through holes 152 have a diameter of 1.5mm, and the cable holes 1121 have a diameter of 4.5mm, so that a circulation passage for cool air can be provided; the 4.5mm diameter of the cable hole 1121 may provide installation space for the motor cable.

Claims

1. The utility model provides an aeroengine is with built-in split type motor mounting structure, includes air inlet machine casket (11) that are connected with engine case (20), its characterized in that: the motor stator mounting frame (13) is fixedly connected to the air inlet casing (11) through a fixing screw (14), an anti-rotation pin (12) is arranged between the motor stator mounting frame (13) and the air inlet casing (11), a wedge block (19) is arranged in the motor stator mounting frame (13) in contact, a motor stator (18) is arranged on the outer wall of the motor stator mounting frame (13) in contact, and the wedge block (19) bears pretightening force to compress the motor stator (18) and the motor stator mounting frame (13); the outer wall of the motor stator (18) is sequentially provided with a motor rotor and a centrifugal impeller (15) from inside to outside;

the motor rotor comprises a motor rotor iron ring (16) adhered in a central hole of the centrifugal impeller (15), a plurality of grooves (161) which are uniformly distributed on the motor rotor iron ring (16) are formed in the motor rotor iron ring (16), and motor rotor magnet strips (17) are adhered in the grooves (161);

the motor rotor iron ring (16) is provided with a plurality of fixing keys (162) which are uniformly distributed on the motor rotor iron ring, the hole wall of the central mounting hole of the centrifugal impeller (15) is provided with a fixing groove (151), and the fixing groove (151) is internally provided with the fixing keys (162).

2. The built-in split motor mounting structure for an aeroengine according to claim 1, wherein circumferentially distributed heat dissipating holes (163) are provided on the motor rotor iron ring (16).

3. The built-in split motor mounting structure for an aeroengine as claimed in claim 2, wherein said heat dissipating holes (163) have a diameter of 2mm.

4. An aero-engine built-in split motor mounting structure according to claim 1, wherein the centrifugal impeller (15) is provided with a plurality of through holes (152) uniformly distributed on itself.

5. An aero-engine built-in split motor mounting structure according to claim 4, wherein the diameter of the through hole (152) is 1.5mm.

6. The mounting structure of the built-in split motor for the aeroengine according to claim 1, wherein the air inlet casing (11) comprises a casing shell (111) and a fixing block (112) arranged in the casing shell (111), a hollow rib plate (113) is arranged between the fixing block (112) and the air inlet casing (11), a plurality of cable holes (1121) which are uniformly distributed on the fixing block (112) are formed in the fixing block (112), and bolt holes (1122) are formed in the fixing block (112).

7. An aero-engine built-in split motor mounting structure according to claim 6, wherein the cable hole (1121) has a diameter of 4.5mm.