KR102285575B1 - Water cooling motor - Google Patents

Abstract

The present invention relates to a water-cooled motor including a rotor and a stator embedded in a housing and a water-cooling means provided on the housing and, more specifically, to a water-cooled motor which can increase the cooling efficiency in a motor by allowing cooling water to evenly flow along the entire sidewall of the motor. To achieve the objective, according to the present invention, the water-cooled motor comprises a rotor and a stator embedded in a housing and a water-cooling means provided on the housing. The cooling means includes: a helical water path having a water inlet and a water outlet for cooling water circulation, and formed in a circumferential direction along the sidewall of the housing; a circulation pipe connecting the water inlet and the water outlet; and a heat exchanger installed on the circulation pipe to cool a water pump for circulating cooling water and discharged cooling water.

Description

Water Cooling Motor {WATER COOLING MOTOR}

The present invention relates to a water-cooled motor comprising a rotor and a stator embedded in a housing and a water-cooling cooling means provided in the housing, wherein the cooling water flows evenly over the entire sidewall of the motor to increase the cooling efficiency inside the motor. is about

Recently, a vehicle using a combustion engine is environmentally friendly, and active research and development of another type of vehicle in consideration of fuel efficiency, that is, a hybrid vehicle or an electric vehicle, and the launch of a new vehicle are in progress.

A hybrid vehicle drives a vehicle with two power sources by linking an existing engine and a motor driven by electric energy, and an electric vehicle is driven only by a motor driven by electric energy. It is positioned as a next-generation vehicle due to the effect of improving fuel efficiency.

In particular, electric vehicles are more eco-friendly because they use only electric energy. Accordingly, the number of battery charging stations nationwide is increasing and subsidies for electric vehicle purchases are increased, thereby promoting the purchase of electric vehicles.

These electric vehicles are equipped with a high-capacity battery as a driving source for driving the electric motor, supplying power to the motor when necessary, and charging the battery with electric energy generated from a regenerative power source when the vehicle is decelerated or stopped.

Such an electric motor for a vehicle may be largely composed of a rotor (rotor) made of a magnetic material such as a permanent magnet and a stator (stator) that generates electromagnetic force to rotate the rotor.

However, when these electric motors are driven for a long time, high-temperature heat is generated around the rotor and stator while the motor rotates at high speed. A cooling structure is required to prevent them from being damaged.

As a related prior art, there is Korean Patent Application Laid-Open No. 10-2016-0000909, in which a water-cooling water channel for increasing cooling efficiency is formed only in a part of the housing, and an air-cooling cooling structure through internal air turbulence is adopted.

However, in general, since the water-cooled cooling structure has better cooling efficiency than the air-cooled type, the development of a motor capable of cooling the entire motor by water cooling is required. Due to this difficulty, the need for technology development is increasing.

Accordingly, the present invention has been devised to solve the above problems,

To provide a water-cooled motor that can prevent malfunctions due to coolant leakage while maximizing the cooling efficiency inside the motor by evenly flowing coolant through the entire sidewall of the motor while adopting water-cooled cooling, which has superior cooling efficiency compared to air-cooling. do.

In order to achieve the above object, the water-cooled motor according to the present invention,

A water-cooled motor comprising a rotor and a stator built in a housing and a water-cooling cooling means provided in the housing,

The cooling means,

A spiral water passage having an inlet and an outlet for cooling water circulation and formed in the circumferential direction along the side wall of the housing,

a circulation pipe connecting the inlet and outlet to each other;

and a water pump installed on the circulation pipe to circulate the cooling water and a heat exchanger to cool the discharged cooling water.

And the water-cooled motor according to the present invention,

The cooling means includes a temperature sensor mounted on the housing to measure the real-time temperature of the motor, and a controller for controlling the water pump and the heat exchanger so that the circulation speed of the coolant and the temperature of the coolant are adjusted according to the real-time temperature sensed by the temperature sensor. It is characterized in that it further comprises.

Further, in the water-cooled motor according to the present invention,

The side wall portion includes an inner wall body provided with the stator inside, and an outer wall body coupled to surround the outer surface of the inner wall body,

The inner wall and the outer wall are each provided with a hemispherical channel groove corresponding to each other in contact with each other, characterized in that the spiral channel is formed.

In addition, in the water-cooled motor according to the present invention,

The outer wall is

A first powder having hook projections on both end surfaces,

It is characterized in that the second powder having a fitting portion into which the hook projection is inserted in both end surfaces and a second powder having a locking groove provided on an outer wall of the fitting portion to engage the hook projection is coupled to each other.

A water-cooled motor according to the present invention,

Cooling water flows through the spiral channel connected in the circumferential direction along the side wall of the housing, so that the cooling efficiency for the entire motor is uniform and excellent.

By controlling the operation of the circulation pipe and the heat exchanger according to the real-time temperature of the motor to control the circulation speed of the cooling water and the temperature of the cooling water, it is possible to prevent undercooling or overcooling of the motor,

The spiral water channel is completely airtight with the inner space of the side wall, thereby preventing failure due to leakage of coolant,

There is an effect that can improve the assembly and watertightness of the outer wall forming the spiral waterway.

1 is a cross-sectional view showing a first embodiment of a water-cooled motor according to the present invention.
Fig. 2 is a rear view of Fig. 1;
3 is a schematic diagram showing a cooling means according to the present invention.
Figure 4 is a side view of the inner wall according to the present invention.
5 is a cross-sectional view showing a second embodiment of the water-cooled motor according to the present invention.
6 is a cross-sectional view of a main part for explaining a watertight coupling means according to the present invention.

The present invention is intended to be described in detail in the text of the embodiment (態樣, aspect) (or embodiments) can be applied to various changes and can have various forms. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

In each drawing, the same reference numerals, particularly the tens digit and the one digit, or the tens digit, the one digit, and the same alphabetic reference numerals indicate members having the same or similar functions, and, unless otherwise stated, each The member indicated by the reference sign may be understood as a member conforming to these standards.

In addition, in each drawing, components are expressed in exaggeratedly large (or thick) or small (or thin) in size or thickness in consideration of convenience of understanding, or simplified, but the protection scope of the present invention is limited by this. it shouldn't be

The terminology used herein is only used to describe a specific embodiment (aspect, aspect, aspect) (or embodiment), and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise.

In the present application, terms such as comprises or consists of are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification is present, but one or more other features It is to be understood that it does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

~1~, ~2~, etc. described in the present specification will be referred to only to distinguish that they are different components, and are not limited to the order of manufacture, and their names in the detailed description and claims of the invention are may not match.

In describing the water-cooled motor according to the present invention, for convenience, if an approximate direction standard that is not strict is specified with reference to FIGS. In the detailed description and claims of the invention related to other drawings, unless otherwise specified, directions are specifically described in accordance with this standard.

Hereinafter, a water-cooled motor according to the present invention will be described with reference to the accompanying drawings.

The present invention relates to a water-cooled motor including a rotor (R) and a stator (S) embedded in a housing (10) and a water-cooling cooling means (20) provided in the housing (10), as shown in FIGS. 1 to 5 . as has been done,

The cooling means 20,

A spiral water channel 21 having an inlet 21a and an outlet 21b for cooling water circulation and formed in the circumferential direction along the sidewall 11 of the housing 10;

a circulation pipe 22 connecting the inlet 21a and the outlet 21b to each other;

and a water pump 23 installed on the circulation pipe 22 to circulate cooling water, and a heat exchanger 24 to cool the discharged cooling water.

First, the housing 10 includes an inner wall 11A and an outer wall 11B forming the side wall portion 11, and front and rear caps 12 and 13 coupled to the front and rear end openings of the side wall portion 11. is composed of

In addition, the stator (S) (stator) is provided inside the side wall part 11, and the rotor (R) (rotor) is provided in the center of the stator S, so that the rotor R rotates when power is supplied. while rotating the drive shaft connected thereto to generate power.

In particular, the inner wall body 11A and the outer wall body 11B are each provided with a hemispherical channel groove 11a corresponding to each other in contact with each other, so that the spiral channel 21 is formed.

The inner wall body (11A) is provided with a channel groove (11a) forming an inner part of the spiral channel 21 on the outer peripheral surface in a cylindrical shape,

The outer wall body 11B is composed of a semi-circular jacket type of a first powder 11Ba and a second powder 11Bb,

A conduit groove 11a forming the outer side of the spiral conduit 21 is provided on the inner circumferential surface of each of the powders 11Ba and 11Bb,

As the first and second powders 11Ba and 11Bb are coupled to surround the outer surface of the inner wall 11A, the inner wall 11A and the respective powders 11Ba and 11Bb (outer wall 11B) are coupled The grooves 11a abut against each other to form the spiral conduit 21 .

In addition, an inlet 21a and an outlet 21b are provided in the water channel groove 11a of the outer wall 11B and are connected to the cooling water circulation pipe 22 .

At this time, the spiral water channel 21 is a single water channel formed in one direction, as in the first embodiment of FIG.

Alternatively, as in the second embodiment of FIG. 5 , as a double water channel formed in both directions, a connection part connected in the other direction is provided at the other end of the water channel formed in one direction, and both ends located on one side of the side wall part 11 . to each inlet (21a) and outlet (21b) may be connected.

The inlet 21a and the outlet 21b of the spiral water channel 21 are connected to the circulation pipe 22 for cooling water circulation to form a flow path through which the cooling water circulates,

The cooling water pumped by the water pump 23 is supplied to the inlet 21a in a cooled state while passing through the heat exchanger 24 (radiator) and passes through the spiral waterway 21, the entire housing 10 of the motor. After the water-cooling cooling is made, it is discharged to the water outlet 21b.

In addition, after cooling the motor, the discharged cooling water is heated and higher than the temperature before being supplied to the motor. This heated cooling water passes through the water pump 23 and then passes through the heat exchanger 24 again to be re-cooled to the motor. circulating supply.

The cooling water circulating in the spiral water channel 21 passes through the entire sidewall 11 of the housing 10 to uniformly cool the temperature inside the motor.

An unexplained reference numeral 14 denotes a power supply port to which a cable for supplying power (three-phase power) is connected, and an unexplained reference numeral 15 denotes a sensor connector in which the temperature sensor 25 and the hall sensor are mounted.

In addition, the cooling means 20,

a temperature sensor 25 mounted on the housing 10 to measure the real-time temperature of the motor;

It further includes a controller 26 for controlling the water pump 23 and the heat exchanger 24 so that the circulation speed of the cooling water and the temperature of the cooling water are adjusted according to the real-time temperature sensed by the temperature sensor 25 .

The temperature sensor 25 is mounted on the sensor connector 15 to sense the temperature inside the motor, and is connected to the controller 26 and a control circuit to transmit the measured real-time temperature to the controller 26 .

The controller 26 (inverter or controller) drives the water pump 23 and the heat exchanger 24,

The real-time temperature of the motor is received from the temperature sensor 25 mounted on the housing 10 (rear cap 13) of the motor, and at this time, the water pump 23 and the heat exchanger 24 are operated according to the sensed real-time temperature. Control the output.

That is, when the real-time temperature sensed due to overheating of the motor greatly exceeds the set temperature, the controller 26 controls the pumping output of the water pump 23 and/or the rotation output of the fan motor provided in the heat exchanger 24 . to increase the circulation rate of the cooling water and/or the cooling rate of the cooling water in the heat exchanger 24, thereby increasing the cooling rate for the motor,

Conversely, when the temperature of the motor approaches the set temperature, the controller 26 lowers the operating output of the water pump 23 and/or the heat exchanger 24 to reduce the circulation rate of the cooling water and/or the cooling rate of the cooling water. to prevent overcooling of the motor.

Through this, the present invention automatically controls the cooling water to flow along the entire sidewall 11 of the housing 10 to uniformly cool the motor, and to always cool and maintain the temperature of the motor at a constant temperature.

On the other hand, the outer wall body 11B is a semi-circular jacket type of first and second powders 11Ba and 11Bb, and both ends of the powders 11Ba and 11Bb are abutted and coupled to each other. At this time, each powder 11Ba As the water channel groove 11a is provided on the inner circumferential surface of 11Bb, it may be difficult to bolt both end surfaces of the powders.

Accordingly, the present invention further includes a watertight coupling means 30 capable of securing watertightness and increasing bonding force between the powders 11Ba and 11Bb while hooking the first and second powders 11Ba and 11Bb to each other. .

First, the first powder 11Ba has hook protrusions 16 protruding from both end surfaces, and the second powder 11Bb is formed concavely in a groove shape on both end surfaces, so that the hook projections 16 are A fitting portion 17 to be inserted and a locking groove 18 provided on the outer wall 17a of the fitting portion 17 to engage the hook protrusion 16 are provided.

And the watertight coupling means 30 forms a watertight end 31 protruding from the end face of the first powder 11Ba, the fitting portion 17, and a fitting groove into which the watertight end 31 is fitted. Both side bulkheads 32 with 32a, provided inside the both side bulkheads 32, and connected through a pipe-shaped pressure pipe 36 made of a hard material, and the pressure pipe 36, An elastic band 34 of a soft material that is fitted and fixed in the fitting groove 32a in the longitudinal direction of the end face of the second powder 11Bb, and has elastic force in the contraction direction, is provided at the end of the hook protrusion 16 and a fixing groove 35 concave in a shape corresponding to the outer surface of the pressurizing tube 36, and a push protrusion 36 formed to protrude upward in an inward oblique direction from the bottom of the locking groove 18,

When the first powder 11Ba and the second powder 11Bb are hooked together, the elastic band 34 expands and expands while the pressure tube 36 is inserted into the fixing groove 35 while being pushed. After being in close contact with the groove (32a), when the hook projection (16) is caught in the locking groove (18), the push projection (36) pushes the pressure tube (36) toward the inner surface of the hook projection (16). It is characterized in that the pressure tube 36 is pressed so that the hook projection 16 is in close contact with the locking groove 18 while returning to the original position.

A plurality of the hook protrusions 16 are provided with a predetermined distance apart from each other along the end face of the first powder 11Ba, and the fitting portion 17 is formed in the longitudinal direction along the end face of the second powder 11Bb. , at a position corresponding to each of the hook protrusions 16, both sides of the partition wall portions 32 erected in a direction perpendicular to the longitudinal direction of the fitting portion 17 are provided, and the hook projections ( 16) is inserted.

The watertight end 31 is formed in the longitudinal direction along the end face of the first powder 11Ba, and the outer end of each partition wall 32 has a fitting groove 32a into which the watertight end 31 is fitted. provided

The pressure tube 36 has a length corresponding to the width of the partition wall portions 32 on both sides, a hollow portion is provided to penetrate in the longitudinal direction, and the elastic band 34 is fitted through the pressure tube 36 . , both end portions of the elastic band 34 are fixed to both ends of the end surface of the second powder 11Bb, and are seated in a form passing through the fitting groove 32a.

The fixing groove 35 is provided at the end of the hook protrusion 16 in a shape corresponding to the shape of the outer circumferential surface of the pressure tube 36 , and the push protrusion 36 is disposed from the bottom to the end of the locking groove 18 . The part is provided to protrude upwardly inward so as to have a length that can be inserted into the fixing groove 35 .

Therefore, when the first powder 11Ba and the second powder 11Bb are hooked together, the pressure pipe 36 supported by the fixing groove 35 is pushed into the fitting part 17 and inserted, so that the elasticity As the band 34 expands, it is in close contact with the bottom surface of the fitting groove 32a, and when the hook protrusion 16 is inserted into the locking groove 18 and caught, the push protrusion 36 is positioned on the fixing groove 35. Push the pressure tube (36) to the inside of the hook projection (16) to separate.

The pressure tube 36 separated from the fixing groove 35 is returned to the original height of the fitting groove 32a by the elastic force of the elastic band 34, and at this time, the elastic force of the elastic band 34 is applied to the outer wall 17a. As it is exerted toward the , the pressure tube 36 pushes the inner surface of the hook projection 16 outward, so that the hook projection 16 does not fall out of the locking groove 18 .

Accordingly, the gap between the first powder 11Ba and the second powder 11Bb is sealed through the elastic band 34 to secure watertightness, and at the same time, the pressure tube 36 to which the elastic force of the elastic band 34 acts. ) forces the hook protrusion 16 not to fall out of the locking groove 18 so that the first and second powders 11Ba and 11Bb are firmly coupled to each other.

In the above description of the present invention, with reference to the accompanying drawings, the water-cooled motor has been mainly described, but various modifications, changes and substitutions are possible by those skilled in the art, and such modifications, changes and substitutions fall within the protection scope of the present invention. should be interpreted as

R : Rotor S : Stator
D: drive shaft
10: housing 11: side wall part
11A: inner wall 11B: outer wall
11a: channel groove 12: front cap
13: rear cap 14: power connector
15: sensor connector 20: cooling means
21: spiral channel 21a: inlet
21b: outlet 22: circulation pipe
23: water pump 24: heat exchanger
25: temperature sensor 26: controller

Claims (4)

A water-cooled motor comprising a rotor (R) and a stator (S) embedded in a housing (10) and a water-cooling cooling means (20) provided in the housing (10),
The cooling means 20,
A spiral water passage 21 having an inlet 21a and an outlet 21b for cooling water circulation and formed in the circumferential direction along the sidewall 11 of the housing 10;
a circulation pipe 22 connecting the inlet 21a and the outlet 21b to each other;
and a water pump 23 installed on the circulation pipe 22 to circulate cooling water and a heat exchanger 24 to cool the discharged cooling water,
The side wall portion 11 includes an inner wall body 11A having the stator S provided therein, and an outer wall body 11B coupled to surround the outer surface of the inner wall body 11A,
The outer wall body 11B,
A first powder (11Ba) having hook projections (16) protruding from both end surfaces (11Ba);
It is provided on the outer wall 17a of the fitting part 17, which is formed concavely in the shape of a groove on both end surfaces and into which the hook protrusion 16 is inserted, and the hook protrusion 16 is caught. Consists of a second powder (11Bb) having a groove (18),
The watertight end 31 protruding from the end face of the first powder 11Ba,
Forming the fitting portion 17, both side partition walls 32 having fitting grooves 32a into which the watertight end 31 is fitted;
The pressure pipe 36 in the shape of a pipe provided inside the both sides of the partition wall 32 and made of a hard material,
An elastic band 34 of a soft material having an elastic force in the contraction direction, which is inserted and fixed in the fitting groove 32a in the longitudinal direction of the end face of the second powder 11Bb while being connected through the pressure tube 36;
A fixing groove (35) provided at the end of the hook projection (16) and concave in a shape corresponding to the outer surface of the pressure tube (36);
Including a watertight coupling means 30 including a push protrusion 36 formed to protrude upward from the bottom of the locking groove 18 in an inward oblique direction,
When the first powder 11Ba and the second powder 11Bb are hooked together, the elastic band 34 expands and expands while the pressure tube 36 is inserted into the fixing groove 35 while being pushed. After being in close contact with the groove (32a), when the hook projection (16) is caught in the locking groove (18), the push projection (36) pushes the pressure tube (36) toward the inner surface of the hook projection (16). Water-cooled motor, characterized in that while the pressure tube (36) is returned to its original position, the hook projection (16) is pressed so that it is in close contact with the locking groove (18).
The method of claim 1,
The cooling means 20 is mounted on the housing 10, a temperature sensor 25 for measuring the real-time temperature of the motor, and the circulation speed of the coolant and the temperature of the coolant according to the real-time temperature sensed by the temperature sensor 25. Water-cooled motor, characterized in that it further comprises a controller (26) for controlling the water pump (23) and the heat exchanger (24) to be adjusted.
The method of claim 1,
The inner wall (11A) and the outer wall (11B) are each provided with a hemispherical water channel groove (11a) corresponding to each other in contact with each other, the water-cooled motor, characterized in that the spiral channel (21) is formed.
4. The method according to any one of claims 1 to 3,
The spiral waterway 21 is,
As a single water channel formed in one direction, the water inlet 21a is connected to one end and the water outlet 21b is connected to the other end,
Alternatively, as a double water channel formed in both directions, a connection part connected in the other direction is provided at the other end of the water channel formed in one direction, and an inlet 21a and an outlet 21b are provided at both ends located on one side of the side wall part 11, respectively. ) is a water-cooled motor, characterized in that it is connected.

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