CN102447349A

CN102447349A - Axial flow air cooled external rotor electric machine

Info

Publication number: CN102447349A
Application number: CN2010105020662A
Authority: CN
Inventors: 黎虤
Original assignee: Individual
Current assignee: Shanghai Gengcheng Information Technology Service Center
Priority date: 2010-10-09
Filing date: 2010-10-09
Publication date: 2012-05-09
Anticipated expiration: 2030-10-09
Also published as: CN102447349B

Abstract

The invention discloses an axial flow air cooled external rotor electric machine. A stator core wound with winding is fixed on an electric machine shaft by a bracket. An external shell sleeve is provided at external side of a rotor. End covers of the electric machine is respectively correspondingly fixed at two axial ends of the rotor. The integrated body formed by the end covers and the rotor is sleeved on external side of the stator core wound with winding. Two axial ends of the bracket are respectively and air-tightly connected with external side walls of the end covers. Side walls of the end covers and the bracket are all provided with several axial through vent holes. Internal side wall of the end cover at power output end of the electric machine is further provided with several projected blades. When the electric machine is working, since the end covers are rotary, under the stirring effect of the blades at internal side of the end cover, cool air will enter inside of the electric machine from vent holes of the end cover and flow out from the other side to bring away heat on the bracket, namely, heat on the winding and the stator core to realize rapid radiation such that the electric machine will not burn down by high temperature even when under high speed rotation and high power working conditions to effectively prolong service life of the electric machine.

Description

The air-cooled external rotor electric machine of axial flow

Technical field

The present invention relates to a kind of electric machine structure, the air-cooled external rotor electric machine of particularly a kind of axial flow.

Background technology

The heat of motor windings generation at present passes to the housing and the end cap of motor through radiation mode; Absorbed the diffusing motor outside of arriving, back by housing and end cap; Through wind-cooling heat dissipating, this radiating mode heat radiation is slow, and the heat that motor produces when work is difficult to distribute fast; Cause motor aging easily, influence the useful life of motor.

Summary of the invention

In order to remedy above deficiency, the invention provides the air-cooled external rotor electric machine of a kind of axial flow, the air-cooled external rotor electric machine of this axial flow is simple in structure, heat transferred fast, cooling is abundant.

The present invention for the technical scheme that solves its technical problem and adopt is: the air-cooled external rotor electric machine of a kind of axial flow, comprise the stator core, motor shaft, support, rotor, housing and the end cap that are tied with winding, and the stator core that is tied with winding is fixedly arranged on the motor shaft through support; Shell is sheathed on the rotor outside; The end cap of motor correspondence respectively is fixedly arranged on the rotor axial two ends, and the integral body that end cap and rotor form is sheathed on the outside of the stator core that is tied with winding, and support shaft is tightly connected with the end cap madial wall respectively to two ends; Be equipped with some ventilation holes that axially run through on said end cap and the rack side wall; Also be provided with the blade of some convexities on the end cap madial wall of said motor power output, during the motor rotation, the blade on the end cap of motor power output blows to support with air-flow; Air-flow is taken away the heat on the support; Flow out to the outside from the end cap of opposite side, reduced motor temperature, improved the reliability of motor.

As further improvement of the present invention; Be equipped with protruding blade on the said rotor axial end covers at two sides; Blade on the end cap of motor power output opposite one side also makes gas flow; Airflow flowing has also been taken away the heat on this side electric motor end cap simultaneously, has further accelerated the motor cooling.

As further improvement of the present invention, the blade of the convexity on the said end cap madial wall is the convex tendon from the radiation of middle mind-set periphery.

As further improvement of the present invention, said blade is the linear pattern convex tendon.

As further improvement of the present invention, said blade is and end cap cylindrical tangent line off plumb angled straight lines type convex tendon.

As further improvement of the present invention, said blade is the arc line type convex tendon.

As further improvement of the present invention, the ventilation hole on said end cap and the support is evenly arranged along each sidewall.

As further improvement of the present invention; Said support shaft to two ends with the structure that the end cap madial wall is tightly connected is respectively: said end cap madial wall is provided with the circular step to the inboard protrusion of motor; Also be provided with two sealing rings; These two sealing ring madial walls press closer the outer circumference surface of support shaft to two ends; The sealing ring lateral wall presses closer the circular step inner peripheral surface on the end cap madial wall respectively, and sealing ring is with the space sealing that forms between the support outer circumference surface outside and end cap and the rotor, and the stator core that just will be tied with winding is sealed in the environment of this sealing.

Useful technique effect of the present invention is: the present invention runs through ventilation hole through on the rack side wall of electric motor end cap and stator core, establishing, and establishes blade in the end cap inboard, during machine operation; Because end cap rotates; It is under the agitaion of the inboard blade of end cap, and cold air flows out from opposite side after the end cap ventilation hole gets into motor internal, and the heat on the support is taken away; Also just the heat on winding and the stator core is taken away; Realize quick heat radiating,, effectively prolonged the useful life of motor under the situation of high speed rotating or high power work even motor also can not burnt by Yin Gaowen.

Description of drawings

Fig. 1 is a structure principle chart of the present invention;

Fig. 2 is the end cap front view of motor power output;

Fig. 3 be among Fig. 2 A-A to cutaway view;

Fig. 4 is the end cap rearview of motor power output;

Fig. 5 is the end cap front view of motor power input;

Fig. 6 be among Fig. 5 B-B to cutaway view;

Fig. 7 is the end cap rearview of motor power input;

Fig. 8 is the support front view;

Fig. 9 be among Fig. 8 C-C to cutaway view.

Embodiment

Embodiment: the air-cooled external rotor electric machine of a kind of axial flow, comprise the stator core 1, motor shaft 3, support 4, rotor 5, housing 6 and the end cap 7 that are tied with winding 2, the stator core 1 that is tied with winding 2 is fixedly arranged on the motor shaft 3 through support 4; Shell is sheathed on rotor 5 outsides; The end cap 7 of motor correspondence respectively is fixedly arranged on rotor 5 axial two ends, and the integral body that end cap 7 and rotor 5 form is sheathed on the outside of the stator core 1 that is tied with winding 2, and support 4 axial two ends are tightly connected with end cap 7 madial walls respectively; Be equipped with some ventilation holes that axially run through 41 on said end cap 7 and support 4 sidewalls; Also be provided with the blade 71 of some convexities on end cap 7 madial walls of said motor power output, during the motor rotation, the blade 71 on the end cap 7 of motor power output blows to support 4 with air-flow; Air-flow is taken away the heat on the support 4; Flow out to the outside from the end cap 7 of opposite side, reduced motor temperature, improved the reliability of motor.

Be equipped with protruding blade 71 on the said rotor 5 axial end covers at two sides 7; Blade 71 on the end cap 7 of motor power output opposite one side also makes gas flow; Airflow flowing has also been taken away the heat on this side electric motor end cap 7 simultaneously, has further accelerated the motor cooling.

The blade 71 of the convexity on said end cap 7 madial walls is the convex tendon from the radiation of middle mind-set periphery.

Said blade 71 is the linear pattern convex tendon.

Said blade 71 is and end cap cylindrical tangent line off plumb angled straight lines type convex tendon.

Said blade 71 is the arc line type convex tendon.

Said end cap 7 is evenly arranged along each sidewall with the ventilation hole 41 on the support 4.

Said support 4 axial two ends with the structure that end cap 7 madial walls are tightly connected are respectively: said end cap 7 madial walls are provided with the circular step 72 to the inboard protrusion of motor; Also be provided with two sealing rings 8; These two sealing ring 8 madial walls press closer the outer circumference surface at support 4 axial two ends; Sealing ring 8 lateral walls press closer circular step 72 inner peripheral surfaces on end cap 7 madial walls respectively; Sealing ring 8 gets up the space sealing that forms between the support 4 outer circumference surfaces outside and end cap 7 and the rotor 5, and the stator core 1 that just will be tied with winding is sealed in the environment of this sealing.

Claims

1. air-cooled external rotor electric machine of axial flow; Comprise the stator core (1), motor shaft (3), support (4), rotor (5), housing (6) and the end cap (7) that are tied with winding (2); The stator core (1) that is tied with winding (2) is fixedly arranged on the motor shaft (3) through support (4); Shell is sheathed on rotor (5) outside; It is characterized in that: the end cap of motor (7) correspondence respectively is fixedly arranged on axially two ends of rotor (5), and the integral body that end cap (7) and rotor (5) form is sheathed on the outside of the stator core (1) that is tied with winding (2), and support (4) axially is tightly connected with end cap (7) madial wall respectively at two ends; Be equipped with some ventilation holes that axially run through (41) on said end cap (7) and support (4) sidewall, also be provided with the blade (71) of some convexities on the end cap of said motor power output (7) madial wall.

2. the air-cooled external rotor electric machine of axial flow as claimed in claim 1 is characterized in that: said rotor (5) axially is equipped with protruding blade (71) on the end covers at two sides (7).

3. according to claim 1 or claim 2 the air-cooled external rotor electric machine of axial flow, it is characterized in that: the blade (71) of the convexity on said end cap (7) madial wall is the convex tendon from the radiation of middle mind-set periphery.

4. the air-cooled external rotor electric machine of axial flow as claimed in claim 3 is characterized in that: said blade (71) is the linear pattern convex tendon.

5. the air-cooled external rotor electric machine of axial flow as claimed in claim 4 is characterized in that: said blade (71) is and end cap cylindrical tangent line off plumb angled straight lines type convex tendon.

6. the air-cooled external rotor electric machine of axial flow as claimed in claim 3 is characterized in that: said blade (71) is the arc line type convex tendon.

7. the air-cooled external rotor electric machine of axial flow as claimed in claim 1 is characterized in that: the ventilation hole (41) on said end cap (7) and the support (4) is evenly arranged along each sidewall.

8. the air-cooled external rotor electric machine of axial flow as claimed in claim 1; It is characterized in that: said support (4) axially two ends with the structure that end cap (7) madial wall is tightly connected is respectively: said end cap (7) madial wall is provided with the circular step (72) to the inboard protrusion of motor; Also be provided with two sealing rings (8); This two sealing rings (8) madial wall presses closer the axially outer circumference surface at two ends of support (4), and sealing ring (8) lateral wall presses closer circular step (72) inner peripheral surface on end cap (7) madial wall respectively.