CN-224218229-U - Traction structure and traction machine with self-cooling outer rotor fan blades

CN224218229UCN 224218229 UCN224218229 UCN 224218229UCN-224218229-U

Abstract

A traction structure of self-cooling outer rotor blades comprises a machine base, a rotating shaft, a stator and a rotor, wherein an annular groove is formed between an outer ring, a middle ring and an end face side wall, the annular groove is exposed out of an opening of the groove at the opposite front side, an air outlet is formed in the end face side wall, the inner ring is arranged in the middle ring, the middle ring is connected with the inner ring through a plurality of heat dissipation ribs, one ends of the heat dissipation ribs are connected with the inner ring, the other ends of the heat dissipation ribs are connected with the middle ring, an air inlet hole is formed in one end, opposite to the rear side, of the air inlet hole, the air inlet hole is exposed out of the outer surface of the machine base, one end, opposite to the front side, of the air inlet hole is consistent with the opening of the groove, the air inlet hole, the annular groove and the air outlet are sequentially communicated, the rotating shaft is rotatably arranged on the inner ring, an inner ring of the stator is arranged on the outer ring of the middle ring, the rotor is provided with a traction installation part for installing traction wheels, one surface, which faces the opening of the groove, is provided with radially extending fan blades, and the stator is close to the fan blades. The problem that the radiating effect is poor caused by the fact that the air path is not communicated when the traction machine works is solved.

Inventors

LIANG CHANGYONG
JIANG ZHENHE
LI DEGUI
XIE YONGHUI
Weng Yujun
LIU QINGHUI
YANG DONGWEN
HE XUSHENG

Assignees

合普动力股份有限公司

Dates

Publication Date: 20260508
Application Date: 20250418

Claims (10)

1. The traction structure of the self-cooling outer rotor fan blade is characterized by comprising a machine seat, a rotating shaft, a stator and a rotor; the stand comprises an outer ring, a middle ring and an inner ring; The outer ring is connected with the middle ring through end face side walls, and annular grooves are formed among the outer ring, the middle ring and the end face side walls; the annular groove is exposed out of the groove opening at the opposite front, and the side wall of the end face is provided with an air outlet; the inner ring is arranged in the middle ring, the middle ring is connected with the inner ring through a plurality of heat dissipation ribs, one end of each heat dissipation rib is connected with the inner ring, and the other end of each heat dissipation rib is connected with the middle ring; the air inlet is arranged at one end of the air inlet at the opposite rear side and exposed out of the outer surface of the machine base, and the air inlet is arranged at one end of the air inlet at the opposite front side and is consistent with the opening direction of the groove; the rotating shaft is rotatably arranged on the inner ring, the inner ring of the stator is arranged on the outer ring of the middle ring, the rotating shaft is arranged on the rotor, the outer ring of the rotor is positioned on the outer ring of the stator, the rotor covers the opening of the groove, radially extending fan blades are arranged on one surface of the rotor, facing the opening of the groove, of the rotor, the end part of the stator and the air inlet are close to the fan blades, and a traction installation part for installing a traction wheel is arranged on the rotor.
2. The traction structure for self-cooling of outer rotor blades according to claim 1 is characterized in that an inner end face is arranged on one side of the rotor, which faces an opening of the groove, a plurality of fan blades are circumferentially distributed on the inner end face, a blade air guide groove is formed between the inner end face and two adjacent fan blades, and the stator is close to the blade air guide groove.
3. The traction structure of claim 2, wherein the rotor is integrally combined with the rotating shaft.
4. The traction structure of self-cooling outer rotor blades according to claim 3, wherein one end of the inner ring extends into a surrounding area of a plurality of the blades in the inner end face and is close to the bottom wall of the inner end face, and the blade air guide groove is arranged close to the air inlet.
5. The traction structure for self-cooling of outer rotor blades according to claim 2 is characterized in that the distance between the inner wall of the inner end face and the stator is gradually reduced from the inner ring to the outer ring, the inner end face is provided with a plurality of circumferentially distributed air guide steps, the air guide steps are transited from the inner ring of the inner end face to the outer ring, the air guide steps are gradually close to the stator from the inner ring to the outer ring, and two adjacent air guide steps are transited through an air guide inclined plane.
6. The traction structure for self-cooling of outer rotor blades according to claim 2, wherein a part of the blades are provided with an L-shaped notch on one surface of the blades facing the stator, and winding ends of the stator extend into the L-shaped notch.
7. The self-cooling traction structure of an outer rotor blade according to any one of claims 1 to 6, further comprising a protective cover; the protective cover is arranged at the air outlet, and the surface of the protective cover is provided with ventilation holes.
8. The traction structure of self-cooling outer rotor blades as recited in claim 7, wherein said protective cover is provided with a louver, said louver being provided with a plurality of said ventilation holes opening downward.
9. The self-cooling traction structure of an outer rotor blade according to any one of claims 1 to 6, further comprising a baffle; The baffle plate is arranged on the machine base and covers the air inlet holes, and the baffle plate is provided with a plurality of plate air inlet holes.
10. A traction machine is characterized by comprising a traction wheel and the traction structure with the self-cooling outer rotor fan blades, wherein the traction wheel is arranged on a traction installation part.

Description

Traction structure and traction machine with self-cooling outer rotor fan blades Technical Field The utility model relates to the field of traction machines, in particular to a traction structure with self-cooling outer rotor blades and a traction machine. Background The existing permanent magnet synchronous traction machine stator with an outer rotor structure is surrounded by a rotor and a machine base, permanent magnets are also in a relatively closed space, heat generated by the stator can only be naturally radiated by virtue of the outward conduction of the machine base, and internal hot air cannot be actively discharged to the outside of the machine shell, so that the temperature of the motor is too high, and the performance is reduced. Based on the design of the prior art, the thought of installing the fan blades on the rotor is designed, namely, a plurality of radial fan blades are cast on the inner end surface of the rotor, the air inlet holes are arranged on the end surface of the rotor, the air inlet holes are also arranged on the corresponding machine seat, and when the motor rotates, the fan blades drive air flow to radiate the stator, so that the temperature rise of the motor can be reduced to a certain extent, but the scheme has the following defects that the ① air inlet holes are mainly positioned at the outward position of the rotor, so that the air path is not smooth, the ② air inlet holes are the air inlet holes and the air outlet holes, the obvious cooling effect is greatly reduced, and the effect is poor. Disclosure of utility model The utility model aims to provide a traction structure for self-cooling of an outer rotor fan blade, wherein a rotor with a fan blade is arranged on one side of an annular groove, an air outlet is arranged on the other side of the annular groove, an air inlet hole is formed in the traction structure, the annular groove, the air outlet and the air inlet hole are sequentially communicated, and a heat dissipation function for exhausting heat in a motor is achieved only through rotation of the rotor on the premise that an additional heat dissipation structure is not required to be introduced. The utility model also provides a traction machine, which uses the traction structure. To achieve the purpose, the utility model adopts the following technical scheme: A traction structure for self-cooling of outer rotor blades comprises a machine base, a rotating shaft, a stator and a rotor; the stand comprises an outer ring, a middle ring and an inner ring; The outer ring is connected with the middle ring through end face side walls, and annular grooves are formed among the outer ring, the middle ring and the end face side walls; the annular groove is exposed out of the groove opening at the opposite front, and the side wall of the end face is provided with an air outlet; the inner ring is arranged in the middle ring, the middle ring is connected with the inner ring through a plurality of heat dissipation ribs, one end of each heat dissipation rib is connected with the inner ring, and the other end of each heat dissipation rib is connected with the middle ring; the air inlet is arranged at one end of the air inlet at the opposite rear side and exposed out of the outer surface of the machine base, and the air inlet is arranged at one end of the air inlet at the opposite front side and is consistent with the opening direction of the groove; the rotating shaft is rotatably arranged on the inner ring, the inner ring of the stator is arranged on the outer ring of the middle ring, the rotor is provided with the rotating shaft, the outer ring of the rotor is positioned on the outer ring of the stator, and the rotor covers the opening of the groove; the rotor is provided with a radially extending fan blade on one surface of the rotor, which is open to the groove, and the end part of the stator and the air inlet are close to the fan blade. The rotor is provided with an inner end face on one side of the rotor, which is open to the groove, a plurality of fan blades are distributed on the inner end face in a surrounding mode, a fan blade air guide groove is formed between the inner end face and two adjacent fan blades, and the end portion of the stator and the air inlet are close to the fan blade air guide groove. Optimally, the rotor is integrally combined with the rotating shaft. Optimally, one end of the inner ring extends into the surrounding areas of the fan blades in the inner end face and is close to the bottom wall of the inner end face, and the fan blade air guide groove is arranged close to the air inlet. Optimally, the distance between the inner wall of the inner end surface and the stator is gradually reduced from the inner ring to the outer ring, the inner end surface is provided with a plurality of wind guiding steps distributed in a surrounding mode, the wind guiding steps are transited from the inner ring of the inner end surface to the outer ring, the wind guiding st