WO2019200635A1

WO2019200635A1 - Cooling and sealing structure of motor shell

Info

Publication number: WO2019200635A1
Application number: PCT/CN2018/086308
Authority: WO
Inventors: 凌新亮; 余志明; 王永炜; 杨刚刚; 裴正强
Original assignee: 精进电动科技股份有限公司
Priority date: 2018-04-20
Filing date: 2018-05-10
Publication date: 2019-10-24
Also published as: CN208461603U; CN108400671A

Abstract

A cooling and sealing structure of a motor shell, the structure comprising a motor shell (1) and cooling water channels (3) disposed within the motor shell (1), wherein the cooling water channels (3) are distributed in S-shaped structures around the motor shell (1); end surfaces at two ends of the motor shell (1) are provided thereon with sealing structures used for sealing the cooling water channels (3); and an outer surface of the motor shell (1) is provided with a water inlet (4) and a water outlet (5) that are in communication with two ends of the cooling water channels (3). Cooling liquid flows in an S-shape and traverses the cooling water channels (3) around the shell, which effectively solves shaping problems of the motor shell (1), thus improving yield and reducing costs.

Description

Motor housing cooling seal structure

Technical field

The invention belongs to the technical field of motor cooling, and in particular relates to a motor housing cooling and sealing structure.

Background of the invention

When the motor is used, a large amount of heat is generated. If it is not discharged outside the motor casing in time, the accumulated heat will cause the temperature of the stator assembly and the rotor assembly to be too high, so that the rotor magnet is demagnetized and the stator wire package is burned, which affects the normal operation of the motor. The service life is shortened, so the heat dissipation structure must be used to stabilize the temperature within the range that the various components of the motor can withstand. The original motor housing water channel form is usually one-piece casting. This casting method is easy to cause product defects, and the product qualification rate is reduced, such as sand holes and air holes. At the same time, there are also difficulties in sand discharge, low efficiency and high cost. There is an urgent need for a heat dissipation structure for a motor housing that effectively avoids the above-mentioned casting risk while improving product yield and cost.

Summary of the invention

In view of the above problems, an object of the present invention is to provide a motor housing cooling and sealing structure to solve the problems of poor quality, low efficiency, and high cost brought about by the conventional cast molded housing.

In order to achieve the above object, the present invention adopts the following technical solutions:

A motor housing cooling and sealing structure comprises a motor housing and a cooling water channel disposed in the motor housing, wherein the cooling water channel is distributed in an S-shaped structure in a week of the motor housing, the electric A sealing structure for sealing the cooling water channel is disposed on both end faces of the casing, and an outer surface of the motor casing is provided with a water inlet and a water outlet communicating with both ends of the cooling water channel.

Preferably, the cooling water channel comprises a plurality of axial water channels distributed in the circumferential direction, each of the axial water channels extending in the axial direction and sequentially alternately communicating at the front and back ends through the turning channel, wherein the turning channel is located at the front end The end of the motor housing is an open structure, and the sealing structure is located outside the turning passage for sealing the turning passage to form the cooling water passage for reciprocating folding back.

Preferably, the sealing structure comprises a ring groove disposed on an end surface of the motor housing and communicating with each of the turning passages, and a sealing ring is disposed in the ring groove.

Preferably, the sealing ring is an aluminum ring which is fixed in the ring groove by welding and supported by a support surface at the bottom of the ring groove.

Preferably, the sealing structure comprises a plurality of end recesses disposed on the end surface of the motor housing and communicating with each of the turning passages and a plurality of sealing blocks received in the end recesses.

Preferably, the sealing block is an aluminum block that is fixed in the end groove by welding and supported by a support surface at the bottom of the end groove.

Preferably, the plurality of end grooves are all arcuate and the center line is on the same circumference.

Preferably, the water inlet and the water outlet are disposed at the same side end or both side ends of the motor housing.

The invention has the advantages and beneficial effects that the invention passes through a cooling water passage which flows through the casing in a S-shaped form, and the structure and the molding method effectively solve the molding problem of the motor casing, thereby improving the yield and reducing the cost. .

The invention processes a groove at both ends of the motor casing, and the groove forms a passage of the coolant on the one hand, and an aluminum ring or an aluminum block is welded in the groove on the other hand to ensure the sealing of the cooling channel and avoid cooling. Liquid leakage.

The invention has the advantages of simple structure and easy expansion, and the length of the casing can be adjusted according to the actual use without modifying the mold, and the processing technology is simple, the quality is reliable, and the efficiency is high.

BRIEF DESCRIPTION OF THE DRAWINGS

Various other advantages and benefits will become apparent to those skilled in the art from a The drawings are only for the purpose of illustrating the preferred embodiments and are not to be construed as limiting. Throughout the drawings, the same reference numerals are used to refer to the same parts. In the drawing:

Figure 1 is a perspective view of the present invention;

Figure 2 is a cross-sectional view of the present invention;

Figure 3 is an enlarged view of I in Figure 2;

4 is a schematic structural view of an end portion of a motor housing according to an embodiment of the present invention;

FIG. 5 is a schematic structural view of an end portion of a motor casing according to another embodiment of the present invention.

In the figure: 1 is the motor housing, 11 is the ring groove, 2 is the sealing ring, 3 is the cooling water channel, 31 is the axial water channel, 32 is the turning channel, 4 is the water inlet, 5 is the water outlet, 6 is the sealing block .

Mode for carrying out the invention

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While the embodiments of the present invention have been shown in the drawings, the embodiments Rather, these embodiments are provided so that this disclosure will be more fully understood and the scope of the disclosure will be fully disclosed.

The existing motor housing usually adopts an integrated casting method, but the casting sand hole, the air hole, the shrinkage and the like have an influence on the yield of the product.

In view of the insufficiency of the existing integrated casting housing, the present invention provides a cooling structure for a motor housing, which flows through a cooling channel of the housing in the form of an S-shape. This structure and forming method effectively solve the motor. The molding problem of the housing improves the yield and reduces the cost.

The present invention will be described in detail below with reference to the drawings and specific embodiments.

As shown in FIG. 1 , the present invention provides a motor housing cooling and sealing structure, comprising a motor housing 1 and a cooling water channel 3 disposed in the motor housing 1. The cooling water channel 3 is distributed in an S-shaped structure. One end of the casing 1 is provided with a sealing structure for sealing the cooling water channel 3 on both end faces of the motor casing 1. The outer surface of the motor casing 1 is provided with a water inlet 4 and a communicating with both ends of the cooling water channel 3. Nozzle 5.

As shown in FIG. 2-3, the cooling water channel 3 includes a plurality of axial water channels 31 distributed along the circumferential direction. Each of the axial water channels 31 is disposed along the axial direction and alternately communicates through the turning passages 32 at the front and back ends. The turning passage 32 is located at the end of the motor housing 1 and has an open structure. The sealing structure is located outside the turning passage 32 for sealing the turning passage 32 to form a reciprocating F-type cooling water passage 3.

The water inlet 4 and the water outlet 5 are provided at the same side end or both ends of the motor housing 1.

As shown in FIG. 3-4, in an embodiment of the present invention, the sealing structure includes a ring groove 11 disposed on both end faces of the motor housing 1, and the ring groove 11 communicates with each of the turning passages 32 of the cooling water channel 3. A seal ring 2 for closing the turning passage 32 is provided in the ring groove 11.

The seal ring 2 is an aluminum ring which is fixed in the ring groove 11 by welding, and the bottom of the ring groove 11 is provided with a support surface for supporting the seal ring 2. The bottom of the ring groove 11 is designed with an aluminum ring mounted support surface for the purpose of limiting the position of the welded aluminum ring and providing support for the aluminum ring during welding to meet the welding process. The purpose of welding the aluminum ring is to block the cooling water channel 3 and prevent the coolant from overflowing.

As shown in FIG. 5, in another embodiment of the present invention, the sealing structure includes a plurality of end grooves and receiving portions which are disposed on the end faces of the motor housing 1 and communicate with the turning passages 32 of the cooling water channel 3. In the sealing block 6 in each end groove, the bottom of the end groove is provided with a support surface for supporting the sealing block 6. The plurality of end grooves are all arcuate and the center line is on the same circumference.

The sealing block 6 is an aluminum block, and the aluminum block is fixed in the end groove by welding. The segmented aluminum block can be better applied to the motor casing of different sectional shapes. The purpose of welding the aluminum block is to block the cooling water channel 3 and prevent the coolant from overflowing.

The motor housing cooling sealing structure provided by the invention has an axial water channel integrally formed in the motor housing 1 , and grooves (turning passages) are formed at both ends, and the grooves form a passage of the coolant on the one hand, and the other In the aspect, an aluminum ring or an aluminum block is placed on the outside of the groove, and the aluminum ring or the aluminum block is welded to the casing to ensure the sealing of the cooling water channel and avoid leakage of the coolant. Two holes are formed in the outer surface of the motor casing 3 as the water inlet 4 and the water outlet 5, and the water inlet 4 and the water outlet 5 communicate with the inlet and the outlet of the cooling water channel 3, respectively, so that the cooling liquid can be circulated and cooled. The purpose of the housing.

The motor housing of the present invention cools the sealing structure, the cooling liquid in the cooling water channel 3 moves in the axial direction, is folded back at the end, flows through the motor housing 1 in the form of an S-type, and the cooling water channel 3 is squeezed. The pressure type housing is machined in the end to machine the turning passage 32 of the cooling water channel 3, and the two ends of the motor housing 1 are welded by means of two aluminum rings to ensure the sealing of the cooling water channel 3. The structure of the cooling water channel 3 is simple and easy to expand, and the length of the motor casing 1 can be adjusted according to actual use without modifying the mold, and the processing process is simple, the quality is reliable, and the efficiency is high.

The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, improvements, extensions and the like made within the spirit and scope of the invention are included in the scope of the invention.

Claims

A motor housing cooling and sealing structure, comprising: a motor housing (1) and a cooling water channel (3) disposed in the motor housing (1), the cooling water channel (3) An S-shaped structure is distributed around the motor housing (1), and a sealing structure for sealing the cooling water channel (3) is provided on both end faces of the motor housing (1), the motor housing The outer surface of the body (1) is provided with a water inlet (4) and a water outlet (5) communicating with both ends of the cooling water passage (3).
A motor housing cooling and sealing structure according to claim 1, wherein said cooling water passage (3) comprises a plurality of circumferentially distributed axial water passages (31), each of said axial water passages (31) Each of them extends in the axial direction and is alternately connected in turn at the front and back ends by a turning passage (32) located at an end of the motor housing (1) and having an open structure. The sealing structure is located outside the turning passage (32) for sealing the turning passage (32) to form the cooling water passage (3) for reciprocating folding back.
The motor housing cooling and sealing structure according to claim 2, wherein the sealing structure comprises a ring groove disposed on an end surface of the motor housing (1) and communicating with each of the turning passages (32) (11) A seal ring (2) is disposed in the ring groove (11).
The motor housing cooling and sealing structure according to claim 3, wherein the seal ring (2) is an aluminum ring, and the aluminum ring is fixed in the ring groove (11) by welding and passes through The support surface at the bottom of the ring groove (11) is supported.
The motor housing cooling and sealing structure according to claim 2, wherein the sealing structure comprises a plurality of communicating with each of the turning passages (32) disposed on an end surface of the motor housing (1) An end groove and a plurality of sealing blocks (6) received in each of the end grooves.
The motor housing cooling and sealing structure according to claim 5, wherein the sealing block (6) is an aluminum block, and the aluminum block is fixed in the end groove by welding, and passes through the Support surface support at the bottom of the end groove.
The motor housing cooling and sealing structure according to claim 5, wherein the plurality of the end grooves are all arcuate and the center line is on the same circumference.
The motor housing cooling and sealing structure according to claim 1, wherein the water inlet (4) and the water outlet (5) are disposed at the same side end of the motor housing (1) Or both ends.