CN210693588U

CN210693588U - Motor with ventilation cooling structure

Info

Publication number: CN210693588U
Application number: CN201922039409.5U
Authority: CN
Inventors: 薛肇江; 牛晓凯
Original assignee: Huirun Electrical Co ltd
Current assignee: Huirun Electrical Co ltd
Priority date: 2019-11-21
Filing date: 2019-11-21
Publication date: 2020-06-05
Anticipated expiration: 2029-11-21

Abstract

The utility model discloses a motor with a ventilation cooling structure, which comprises a stator core, a front end cover and a rear end cover, wherein the front end cover and the rear end cover are respectively attached to two ends of the stator core; a plurality of groups of channels are arranged on the stator core along the circumferential direction of the stator core, any one group of channels comprises two adjacent and symmetrical through holes extending along the axial direction of the stator core, the rear end cover is provided with first threaded holes corresponding to the through holes one by one, and the front end cover is provided with second threaded holes corresponding to the first threaded holes one by one; one through hole in any group of channels is used for matching with the first threaded hole and the second threaded hole to be axially connected with the front end cover, the stator core and the rear end cover, and the other through hole is used for matching with the first threaded hole and the second threaded hole to form a cooling air duct. The motor with the ventilation cooling structure improves the heat dissipation performance of the motor on the premise of not influencing the performance of the motor and the strength of the shell structure.

Description

Motor with ventilation cooling structure

Technical Field

The utility model relates to a motor cooling technical field, in particular to motor with ventilation cooling structure.

Background

Along with the improvement of the power of the motor, the heating phenomenon of the motor is more serious, and a certain cooling measure needs to be taken to cool the motor. The motor is cooled by an air flow or other coolant, typically generated by an additional fan, and flows through or by the motor. Typically, air-cooled cooling channels are provided inside the core of the machine without a housing, which requires drilling or machining of the core by prefabrication. The drilling can cause damage to the interior of the motor, and the precision of the stator and the formed magnetic field can be affected by the prefabricated machining holes in the machining process. Another common cooling method is to form a cooling channel in the housing of the motor and connect a cooling medium delivery pipe to the cooling channel, which may result in a reduction in the structural strength of the housing of the motor.

Therefore, how to improve the heat dissipation performance of the motor without affecting the overall performance and structural strength of the motor is a technical problem to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a motor with ventilation cooling structure, this motor both need not to set up cooling channel at stator core too much, does not also destroy the structural strength of shell, and has improved the heat dispersion of motor.

In order to achieve the purpose, the utility model provides a motor with a ventilation cooling structure, which comprises a stator core, a front end cover and a rear end cover, wherein the front end cover and the rear end cover are respectively attached to two ends of the stator core;

the stator core is provided with a plurality of groups of channels along the circumferential edge of the stator core, any one group of channels comprises two adjacent and symmetrical through holes extending along the axial direction of the stator core, the rear end cover is provided with first threaded holes corresponding to the through holes one by one, and the front end cover is provided with second threaded holes corresponding to the first threaded holes one by one;

one through hole in any group of channels is used for being matched with the first threaded hole and the second threaded hole to be axially connected with the front end cover, the stator core and the rear end cover, and the other through hole is used for being matched with the first threaded hole and the second threaded hole to form a cooling air duct.

Optionally, the first threaded hole penetrates through the rear end cover, and the second threaded hole comprises second threaded through holes and second threaded blind holes, the number of which is the same as that of the channel groups;

the second threaded through hole and the second threaded blind hole correspond to one group of channels, the cooling air duct is formed by the channel for communicating the second threaded blind hole with the first threaded through hole and the second threaded blind hole.

Optionally, the end face of the rear end cover for attaching to the stator core is a plane.

Optionally, a circular positioning shoulder extending toward the stator core is disposed at a rotating shaft hole through which the rotor penetrates through the front end cover, and the channel is opened at a peripheral portion of the positioning shoulder.

Optionally, the outer contour of the channel is octagonal, and the second threaded hole blind hole side wall is communicated with the channel.

Optionally, the second threaded through holes and the second threaded blind holes are arranged alternately.

Optionally, the cross sections of the stator core, the front end cover and the rear end cover are all square, and a group of channels are arranged at four corners of the stator core.

Optionally, four corners of the stator core, the front end cover and the rear end cover are all arc chamfers protruding towards the axis of the stator core, and the through holes are arranged at two ends of each arc chamfer.

Optionally, a baffle for isolating a set of the circulating cooling air ducts is further provided in the channel.

Optionally, the arc chamfer of the front end cover is provided with a motor fixing hole for fixing a motor.

Compared with the prior art, the utility model provides a motor with ventilation cooling structure sets up the multiunit passageway through the edge in stator core's circumference, and arbitrary group's passageway includes two adjacent through holes, and the rear end cap of motor is provided with first screw hole, and the front end housing of motor is provided with the second screw hole, and first screw hole and second screw hole correspond the setting with the through hole. One through hole in one group of channels is matched with the first threaded hole and the second threaded hole to be used for fixing the front end cover, the stator core and the rear end cover along the axial direction. And the other through hole, the rest first threaded hole and the rest second threaded hole form a cooling air duct. Because the through holes used as the cooling air duct and the threaded holes are symmetrically arranged at the circumferential edge of the stator core in groups, the inherent structure and the internal magnetic field inside the stator core cannot be damaged, the diameter of the through holes is the same as that of the bolts, a cooling channel does not need to be specially arranged on the shell, the strength of the shell is ensured, and meanwhile, the cooling performance of the motor is improved through the cooling air duct formed by the through holes.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic view of an electric machine with a ventilation cooling structure according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of FIG. 1;

fig. 3 is a schematic view of an electric machine with a ventilation cooling structure according to another embodiment of the present invention.

Wherein:

1-rear end cover, 11-first threaded hole, 2-stator core, 21-through hole, 3-front end cover, 31-second threaded hole, 311-second threaded through hole, 312-second threaded blind hole, 32-channel, 33-positioning shoulder, 4-motor fixing hole and 5-baffle.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In order to make the technical field of the present invention better understand, the present invention will be described in detail with reference to the accompanying drawings and the detailed description.

Referring to fig. 1 to 3, fig. 1 is a schematic view of a motor with a ventilation cooling structure according to an embodiment of the present invention, fig. 2 is a cross-sectional view of fig. 1, and fig. 3 is a schematic view of a motor with a ventilation cooling structure according to another embodiment of the present invention. The direction of the arrows in the figure indicates the direction of flow of the cooling air.

The utility model provides a motor with ventilation cooling structure includes front end housing 3, stator core 2 and rear end cap 1, and front end housing 3 and rear end cap 1 assemble both sides around stator core 2. The peripheral edge of the stator core 2 is separately provided with a plurality of groups of channels, any one group of channels includes two adjacent through holes 21 penetrating through the stator core 2 along the axial direction of the stator core 2, and the two through holes 21 in one group of channels are symmetrically arranged, where the symmetry specifically means rotational symmetry or symmetry with respect to a certain straight line passing through the axis of the cross section of the stator core 2, in other words, the distances from the two through holes 21 in one group of channels to the axis of the stator core 2 are equal. The rear end cover 1 and the front end cover 3 are circumferentially provided with first threaded holes 11 and second threaded holes 31 which are in one-to-one correspondence with the through holes 21, the one-to-one correspondence does not mean that the number of the first threaded holes 11 and the number of the second threaded holes 31 are the same as that of the through holes 21, and the matching of positions is included, so that the cooling air duct can be penetrated or formed through bolts.

One through hole 21 in the above-described one set of passages serves to fix the front end cover 3, the stator core 2, and the rear end cover 1 in the axial direction by bolts; the other through hole 21 forms a cooling air duct with the first screw hole 11 and the second screw hole 31, thereby ventilating and cooling the motor.

The present invention provides a motor with a ventilation cooling structure, which is described in more detail below with reference to the accompanying drawings and embodiments.

Referring to fig. 1 and 2, in fig. 1, four groups of channels are formed at the circumferential edge of the stator core 2, the four groups of channels are uniformly arranged along the circumferential direction of the stator core 2, the number of the groups of channels can be flexibly arranged according to the cross-sectional shape of the stator core 2, but it is necessary to pay attention to the reliable connection between the stator core 2 and the front and rear end covers 3 and 1 and the sealing performance at the connection position. The set of passages includes two through holes 21, the through holes 21 are parallel to the axial direction of the stator core 2, and the two sets of through holes 21 of the set of passages are symmetrically arranged when viewed from the cross section of the stator core 2. The rear end cover 1 and the front end cover 3 are respectively provided with eight first threaded holes 11 and eight second threaded holes 31 which are in one-to-one correspondence with the through holes 21.

Wherein, first screw hole 11 runs through rear end housing 1 along rear end housing 1's thickness direction to supply the bolt to penetrate from one side of rear end housing 1, pass stator core 2 in proper order and be connected with front end housing 3. The second threaded holes 31 formed in the front end cover 3 can completely penetrate through the front end cover 3, and nuts are additionally arranged at the tail ends of the bolts after the bolts penetrate through the second threaded holes 31, so that the connection reliability is guaranteed. At this time, half of the four first screw holes 11, the through holes 21, and the second screw holes 31 are connected to the rear end cover 1, the stator core 2, and the front end cover 3 by four bolts. The remaining half of the through holes 21, the first screw holes 11, and the second screw holes 31 form a cooling air duct, which allows cooling air and a cooling medium to be introduced to cool the stator core 2 and the motor.

In the above embodiment, the through-holes 21 are provided in the peripheral edge portion of the stator core 2 and do not communicate with the inside of the stator core 2, and the heat dissipation effect is yet to be improved. Therefore, a slot 32 is provided particularly on the side of the front end cover 3 for attaching the stator core 2, and the slot 32 is provided on the outer periphery of the rotating shaft hole of the front end cover 3 and can communicate with the winding slot of the stator core 2. The second threaded hole 31 includes second threaded through holes 311 and second threaded blind holes 312, the number of the second threaded through holes 311 and the second threaded blind holes 312 is the same as the number of the sets of the passages, and any set of the passages corresponds to one of the second threaded through holes 311 and the second threaded blind holes 312.

The second threaded through hole 311 is used for allowing a bolt to penetrate through to connect the stator core 2, the front end cover 3 and the rear end cover 1; all the second threaded blind holes 312 are communicated with the channels 32, so that the first threaded holes 11, the through holes 21 and the second threaded blind holes 312 form a circulating cooling air duct through the channels 32. At this time, the circulation flow path of the cooling air is as shown in fig. 3: the first screw hole 11 → the through hole 21 → the second screw blind hole 312 → the slot 32 → the winding slot of the stator core 2 → the slot 32 → the other second screw blind hole 312 → the other through hole 21 → the other first screw hole 11. The heat generated by the coil in the stator core 2 is taken away by cooling air, and the heat dissipation performance of the motor is obviously improved.

Second screw through hole 311 and second screw blind hole 312 specifically adopt alternate setting, above-mentioned four sets of second screw blind holes 312 then can form two circulative cooling wind channels, in order to avoid forming mutual interference between two circulative cooling wind channels, still set up baffle 5 between channel 32, baffle 5 divides into two parts with channel 32, arbitrary part intercommunication two sets of second screw blind holes 312, cooperation through hole 21 and first screw hole 11 form two circulative cooling wind channels, baffle 5's setting has reduced the interference of the cooling air current between two circulative cooling wind channels.

In order to facilitate the assembly of the front end cover 3, the front end cover 3 is provided with a positioning shoulder 33 extending toward the stator core 2 along the rotating shaft hole, and the positioning shoulder 33 is an annular shoulder for matching with the rotating shaft hole of the stator core 2. The channel 32 is provided at the periphery of the positioning shoulder 33, the side wall of the second blind threaded hole 312 is communicated with the channel 32, and the channel 32 is communicated with the winding slot of the stator core 2, thereby cooling the inside of the stator core 2. The channel 32 may in particular be provided as a groove having an octagonal or regular polygonal outer contour. The end face of the rear end cover 1 for attaching the stator core 2 is generally arranged as a plane, and rib grooves which are matched with each other to form a seal can also be arranged on the end face of the stator core 2 attached to the rear end cover 1. Or a second channel is arranged on one surface, used for being attached to the stator core 2, of the rear end cover 1, and the second channel is communicated with all winding slots of the stator core 2 and used for cooling air to rotate in the second channel. A second baffle may be disposed in the second channel to separate the two cooling air circulation ducts, and the second baffle and the second channel may be disposed with reference to the baffle 5 and the channel 32, respectively.

The cross sections of the stator core 2, the front end cover 3 and the rear end cover 1 can be square, the number of the channels is four, and the four groups of channels are eight through holes 21 arranged at four corners of the stator core 2. Furthermore, four corners of the stator core 2, the front end cover 3 and the rear end cover 1 are provided with chamfers. The chamfer is a circular chamfer, and the circular chamfer is protruded towards the axis of the stator core 2, namely the axis direction of the front end cover 3 and the rear end cover 1. The set of through holes 21 are disposed on both sides of the circular arc chamfer, and the set of second threaded through holes 311 and second threaded blind holes 312 are disposed on both sides of the circular arc chamfer of the front end cover 3.

Further, the circular arc chamfer portion of the front end cover 3 is provided with a motor fixing hole 4 as shown in fig. 1 or fig. 3, so that the motor with the ventilation cooling structure can be fixed through the motor fixing hole 4 of the front end cover 3.

It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.

The above is to the motor with ventilation cooling structure provided by the utility model is introduced in detail. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. The motor with the ventilation cooling structure is characterized by comprising a stator core (2), and a front end cover (3) and a rear end cover (1) which are respectively attached to two ends of the stator core (2);

a plurality of groups of channels are arranged on the stator core (2) along the circumferential edge of the stator core, any one group of channels comprises two adjacent and symmetrical through holes (21) extending along the axial direction of the stator core (2), the rear end cover (1) is provided with first threaded holes (11) corresponding to the through holes (21) one by one, and the front end cover (3) is provided with second threaded holes (31) corresponding to the first threaded holes (11) one by one;

one through hole (21) in any group of channels is used for being matched with the first threaded hole (11) and the second threaded hole (31) to be axially connected with the front end cover (3), the stator core (2) and the rear end cover (1), and the other through hole (21) is used for being matched with the first threaded hole (11) and the second threaded hole (31) to form a cooling air duct.

2. The electric machine with ventilation cooling structure according to claim 1, characterized in that the first threaded hole (11) penetrates through the rear end cover (1), and the second threaded hole (31) comprises the same number of second threaded through holes (311) and second threaded blind holes (312) as the channel groups;

the second threaded through hole (311) and the second threaded blind hole (312) correspond to one group of channel arrangement, the cooling air duct further comprises a channel (32) for communicating with the second threaded blind hole (312), and the first threaded hole (11), the through hole (21), the second threaded blind hole (312) and the channel (32) form a circulating cooling air duct.

3. The electric machine with a ventilation cooling structure according to claim 2, characterized in that the end face of the rear end cover (1) for fitting the stator core (2) is a plane.

4. The electric machine with a ventilation cooling structure according to claim 3, wherein a circular positioning shoulder (33) extending towards the stator core (2) is provided at a rotating shaft hole of the front end cover (3) for the rotor to pass through, and the channel (32) is opened at the periphery of the positioning shoulder (33).

5. The electric machine with ventilation cooling structure according to claim 4, characterized in that the outer contour of the channel (32) is octagonal, and the blind hole side wall of the second threaded hole (31) is communicated with the channel (32).

6. The electric machine with ventilation cooling structure according to any one of claims 2 to 5, characterized in that the second threaded through holes (311) and the second threaded blind holes (312) are arranged alternately.

7. The electric machine with a ventilation cooling structure according to claim 6, characterized in that the cross section of the stator core (2), the front end cover (3) and the rear end cover (1) is square, and a group of channels is arranged at four corners of the stator core (2).

8. The motor with the ventilation cooling structure as claimed in claim 7, wherein four corners of the stator core (2), the front end cover (3) and the rear end cover (1) are all arc chamfers protruding towards the axes, and a set of the through holes (21) are arranged at two ends of the arc chamfers.

9. The electric machine with a ventilation cooling structure according to claim 8, characterized in that a baffle (5) for isolating a group of the circulating cooling air ducts is further provided in the channel (32).

10. The electric machine with a ventilation cooling structure according to claim 9, characterized in that the arc chamfer of the front end cover (3) is provided with a motor fixing hole (4) for fixing the electric machine.