WO2021045399A1

WO2021045399A1 - Turbo motor capable of high-efficiency cooling through sealed cooling of stator

Info

Publication number: WO2021045399A1
Application number: PCT/KR2020/010548
Authority: WO
Inventors: 박창진
Original assignee: 박창진
Priority date: 2019-09-04
Filing date: 2020-08-10
Publication date: 2021-03-11
Also published as: KR102144666B1; CN114391212A

Abstract

The present invention relates to a turbo motor capable of high-efficiency cooling through sealed cooling of a stator and, more particularly, to a turbo motor comprising: a stator that is provided with a stator core and a coil and generates magnetic force by being supplied with power; and a rotor rotating by magnetization of the stator, wherein the turbo motor can directly and efficiently cool the stator by means of a refrigerant by comprising: a motor housing which is formed apart from the outer circumferential surface of the rotor and hermetically accommodates the refrigerant, and to which the stator is coupled thereinside while being immersed in the refrigerant; a refrigerant inlet formed through the outer surface of the motor housing and through which the refrigerant flows into the motor housing; a refrigerant outlet formed through the outer surface of the motor housing and through which refrigerant flows out of the motor housing; and a refrigerant flow path provided inside the motor housing and formed so as to cool the stator while the refrigerant flows.

Description

Turbo motor for high-efficiency cooling through sealed cooling of the stator

The present invention relates to a turbo motor capable of high-efficiency cooling through sealed cooling of a stator capable of directly cooling a stator by immersing a stator in a motor housing in which a refrigerant is sealedly accommodated.

As is well known, the motor is formed of a stator core, coil, etc. in which silicon steel sheets are stacked to generate magnetic force by receiving power, and a rotor that rotates by magnetization of the stator. Since the turbo motor may use an AC converter for high-speed rotation, electrical heat may inevitably be generated. If such electric heat generation is not removed, the life of the motor may be shortened, and a fire accident due to heat generation may occur.

Accordingly, as a cooling method for cooling such heat generation, an air-cooled cooling method in which the motor is cooled by circulating air, and a water-cooled cooling method in which the motor is cooled by circulating cooling water are mainly used.

In the air-cooled cooling method, the motor can be cooled by supplying air with a cooling fan on one side of the motor or a separate circulation fan, but the heat absorption rate of air itself is not large, and the surrounding cooling fan is provided. When the temperature of the environment is high, since the motor is cooled with high-temperature air, there is a problem in that the cooling efficiency is deteriorated.

In addition, although the water-cooled cooling method has a higher heat absorption rate than air, a heat exchanger, a water tank, and a pipe must be separately provided to cool the water that has absorbed the heat, and most of the components of the turbo motor are devices that use power. There is an inherent problem in that a major accident may occur due to water leakage.

[선행기술문헌][Prior technical literature]

[Patent Literature]

(Patent Document 1) 1. Korean Patent Registration No. 10-0273433-0000 (registered on Sep. 2, 2000)

(Patent Document 2) 2. Korean Patent Registration No. 10-0474323-0000 (registered on Feb. 22, 2005)

The present invention is to provide a technical field of a turbo motor capable of high-efficiency cooling through airtight cooling of a stator that cools the stator by immersing and combining a stator in a motor housing in which a refrigerant is hermetically accommodated.

In addition, the present invention provides a refrigerant flow path that flows through the outer surface of the stator core and passes through the inside of the coil, so that high-efficiency cooling is achieved through airtight cooling of the stator, which allows the refrigerant to directly cool while contacting the stator. It is to provide the technical field of possible turbo motors.

In addition, the present invention is a turbo motor capable of high-efficiency cooling through airtight cooling of the stator that can be applied to various types of stators by changing the location and number of refrigerant inlets and refrigerant outlets according to the size and shape of the stator. It is to provide the technical field of

The objects of the embodiments of the present invention are not limited to the above-mentioned objects, and other objects not mentioned will be clearly understood by those of ordinary skill in the technical field to which the present invention pertains from the following description. .

According to an embodiment of the present invention, in a turbo motor including a stator that is provided with a stator core and a coil and generates magnetic force by being supplied with power, and a rotor that rotates by magnetization of the stator, spaced apart from the outer peripheral surface of the rotor A motor housing in which the stator is immersed in and coupled to the refrigerant, and a refrigerant inlet through which the refrigerant flows into the motor housing; A stator including a refrigerant outlet formed through an outer surface of the motor housing, a refrigerant outlet through which refrigerant flows out of the motor housing, and a refrigerant flow path provided inside the motor housing to cool the stator while the refrigerant flows A turbo motor capable of high-efficiency cooling may be provided through hermetic cooling of.

In addition, according to an embodiment of the present invention, a first stator fixing ring provided at one end of the stator to support the stator and configured to pass the refrigerant introduced from the refrigerant inlet, and the other end of the stator A turbo motor capable of high-efficiency cooling through airtight cooling of the stator including a second stator fixing ring formed to support the stator and flowing the refrigerant passing through the coil to the refrigerant outlet may be provided.

In addition, according to an embodiment of the present invention, the refrigerant flow path, wherein the refrigerant introduced from the refrigerant inlet flows along a side surface of the stator core, passes through the first stator fixing ring, and passes through the coil. A turbo motor capable of high-efficiency cooling may be provided through airtight cooling of the stator formed to flow out through the refrigerant outlet.

In addition, according to an embodiment of the present invention, the refrigerant inlet is formed in a plurality, and the refrigerant is provided to separate and flow into the stator, and the refrigerant outlet is formed at least one between the refrigerant inlet and separates and flows in. A turbo motor capable of high-efficiency cooling may be provided through airtight cooling of the stator provided so that the refrigerant is incorporated and flows out of the motor housing.

In addition, according to an embodiment of the present invention, a plurality of first stator fixing rings are provided at both ends of the stator to support the stator, and formed to pass the introduced refrigerant, and a plurality of first stator fixing rings formed at the center side of the stator. A turbo motor capable of high-efficiency cooling through airtight cooling of the stator including a second stator fixing ring formed to support the stator and flowing the refrigerant passing through the coil to the refrigerant outlet may be provided.

In addition, according to an embodiment of the present invention, the refrigerant flow path, wherein the refrigerant introduced from the refrigerant inlet flows along a side surface of the stator core to one side and the other side of the stator, passes through the first stator fixing ring, and , A turbo motor capable of high-efficiency cooling through airtight cooling of a stator formed to pass through the coil and flow out through the refrigerant outlet may be provided.

In addition, according to an embodiment of the present invention, high-efficiency cooling is possible through airtight cooling of the stator, which is formed on the outer surface of the motor housing and includes at least one pressure regulator provided to adjust the internal pressure of the motor housing. Turbo motors may be provided.

In the present invention, the stator is immersed in a motor housing in which the refrigerant is sealed and coupled, and the introduced refrigerant passes through the outer surface of the stator core, the inside of the coil, etc., absorbing heat emitted from the stator, and absorbing the heating energy of the stator. By doing so, the stator can be cooled directly and efficiently while the refrigerant in the liquid state is changed to the refrigerant in the gaseous state.

In addition, the present invention can be applied to cooling various types of stators by changing the location and number of refrigerant inlets and refrigerant outlets according to the size and shape of the stator, and forming refrigerant passages accordingly.

1 is a diagram illustrating a turbo motor capable of high-efficiency cooling through airtight cooling of a stator that cools a stator according to an embodiment of the present invention.

2 is a diagram illustrating a turbo motor capable of high-efficiency cooling through airtight cooling of a stator for cooling a stator according to another embodiment of the present invention.

Advantages and features of the embodiments of the present invention, and a method of achieving them will be apparent with reference to the embodiments described later in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in a variety of different forms, and only these embodiments make the disclosure of the present invention complete, and are common knowledge in the technical field to which the present invention pertains. It is provided to completely inform the scope of the invention to those who have, and the invention is only defined by the scope of the claims. The same reference numerals refer to the same elements throughout the specification.

In describing the embodiments of the present invention, if it is determined that a detailed description of a known function or configuration may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted. In addition, terms to be described later are terms defined in consideration of functions in an embodiment of the present invention, which may vary according to the intention or custom of users or operators. Therefore, the definition should be made based on the contents throughout the present specification.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating a turbo motor capable of high-efficiency cooling through closed cooling of a stator that cools a stator according to an embodiment of the present invention, and FIG. 2 is a diagram of a stator cooling a stator according to another embodiment of the present invention. A diagram illustrating a turbo motor capable of high-efficiency cooling through hermetic cooling.

1 and 2, a turbo motor capable of high-efficiency cooling through sealed cooling of a stator according to an embodiment of the present invention includes a motor housing 110, a refrigerant inlet 120, a refrigerant outlet 130, and a refrigerant flow path ( 140), a first stator fixing ring 150, a second stator fixing ring 160, a pressure regulator 170, and the like.

First, the turbo motor of the present invention is provided with a stator core 11 and a coil 12, as in a conventional turbo motor, and is supplied with power to generate magnetic force by magnetization of the stator 10 and the stator 10. It may include a rotor 20 that rotates.

The motor housing 110 is formed to be spaced apart from the outer circumferential surface of the rotor 20 and seals and accommodates the refrigerant, and the stator 20 is immersed and coupled to the refrigerant inside the motor housing 110 to be cooled by the refrigerant. I can.

A refrigerant inlet 120 and a refrigerant outlet 130 are formed on the outer surface of the motor housing 110 so that refrigerant flows in and out, and is fixed in contact with the outside of the slot (not shown) of the stator to seal and receive the refrigerant. A first stator fixing ring 150, a second stator fixing ring 160, and a pressure regulator 170 are provided in the housing 110, and a first stator fixing ring 150 is provided on one side of the stator 10. , As the second stator fixing ring 160 is coupled to the other side of the stator 10, the stator 10 may be coupled to the inside of the motor housing 110.

In addition, in a space separated from the motor housing 110 and the rotor 20 to which the stator 10 is coupled, the stator 10 is separated from the rotor 20 and sealed to the motor housing 110 in the form of a cylinder, etc. An isolating member (drawing number omitted) may be provided, and this isolating member (drawing number omitted) is formed of a non-magnetic material, so that the isolating member (drawing number omitted) is magnetized by the stator 10, the rotor 20, etc. Can be prevented.

The refrigerant inlet 120 is formed to pass through the outer surface of the motor housing 110, so that the refrigerant flows into the motor housing 110, in a plurality according to the shape of the stator 10, the refrigerant passage 140, etc. It may be formed, a detailed description thereof will be described later in the refrigerant passage 140.

The refrigerant introduced from the refrigerant inlet 120 flows along the side of the stator core 11, passes through a hole (not shown) of the first stator fixing ring 150, and moves to the coil 12, etc. ) Can be cooled.

In particular, in order for the refrigerant to efficiently cool the heat of the stator 10, the refrigerant inlet 120 may be provided adjacent to the second stator fixing ring 160.

A refrigerant inlet 120 is formed adjacent to the second stator fixing ring 160, and the introduced refrigerant flows through the outer circumferential surface of the stator 10 to cool the stator core 11, etc., and the first stator fixing ring 150 ) Passes through the hole (not shown) and cools the coil 12 while flowing the wound coil 12, and the second stator fixing ring 160 installed spaced apart from the first stator fixing ring 150 It is possible to cool the outer coil 12 of the.

The refrigerant outlet 130 is formed to pass through the outer surface of the motor housing 110 so that the refrigerant flows out of the motor housing 110, and at least one or more depending on the shape of the stator 10, the refrigerant passage 140, etc. Can be installed as.

The refrigerant passage 140 is provided in the motor housing 110 and is formed to cool the stator 10 while the refrigerant flows. The refrigerant introduced from the refrigerant inlet 120 passes through the stator and the refrigerant outlet 130 It is the passage of the refrigerant that flows out into the air.

The refrigerant inlet 120 may be formed adjacent to the second stator fixing ring 160, and the second stator fixing ring 160 is formed in a closed form, so that the refrigerant connects the second stator fixing ring 160 Since it cannot move through, the introduced refrigerant may flow in the direction of the first stator fixing ring 150. The refrigerant moving toward the first stator fixing ring 150 may absorb heat emitted from the stator core 11 and coil 12 while flowing through the outer surface of the stator core 11 formed of a silicon steel plate or the like. In this case, the refrigerant may directly cool the stator core 11 by contacting the stator core 11, and may directly cool the coil 12 or the like by absorbing heat radiated from the coil 12 or the like.

As described above, since the refrigerant continuously flows through the refrigerant inlet 120 and the introduced refrigerant can continuously absorb heat from the stator core 11 and the coil 12 while moving, the stator core 11 The effect of cooling the entire part of) can occur in a balanced manner.

In addition, the refrigerant passing through the hole (not shown) of the first stator fixing ring 150 passes through the coil 12 inside the stator 10, the gap between the motor housing 110 and the coil 12, etc. , It is possible to absorb heat generated from the stator 10.

The coil 12 is inserted into a slot (not shown) formed on the inside of the stator core 11 and wound in the longitudinal direction, and generally, three pairs of independent windings are wound at intervals of 120 degrees, and then a Y connection or a connection method is used. It can be connected and wired.

The refrigerant passing through the coil 12 or the like may flow out from the motor housing 110 through the refrigerant outlet 130 formed adjacent to the second stator fixing ring 160.

On the other hand, depending on the shape of the stator 10 and the coolant passage 140, the location of the coolant inlet 120, the coolant outlet 130, and the like may be changed.

For example, the stator 10 is formed in a large size (that is, the length of the stator 10 is formed to be extended), and a refrigerant inlet 120, a refrigerant outlet 130, etc. are provided at the positions as described above. In this case, the introduced refrigerant flows while cooling the extended stator core 11, the extended coil 12, and the like, and the refrigerant flow path 140 through which the refrigerant flows is also formed in an extended form.

In this case, since the refrigerant capable of absorbing a certain amount of heat must absorb a greater amount of heat from the stator 10 while flowing through the extended refrigerant flow path 140, the end of the coil 12, the refrigerant outlet 130 ) Since the amount of heat absorbed by the refrigerant in the vicinity is significantly reduced, there is a problem that the difference between the heat absorption rate of the refrigerant in the vicinity of the refrigerant inlet 120 and the heat absorption rate of the refrigerant in the vicinity of the refrigerant outlet 130 increases.

In order to overcome this problem, as shown in FIG. 2, the stator core 11 is formed by dividing it, and the refrigerant inlet 120 is formed in plural so that the refrigerant is separated and introduced into the stator 10, and the refrigerant outlet ( 130) is the outer surface of the motor housing 110 corresponding to between the refrigerant inlet 120 (that is, the central position of the stator 10), the separated and introduced refrigerant is combined to the outer side of the motor housing 110 Is formed to flow out.

In addition, the first stator fixing ring 150 is provided in plural at both ends of the stator 10 to support the stator 10, and is formed to pass the introduced refrigerant, and the second stator fixing ring 160 is a stator A plurality of pieces are provided at the center of (10) to support the stator 10, the refrigerant passing through the coil 12 is guided to the refrigerant outlet 130 and formed to flow, and the refrigerant passage 140 includes a refrigerant inlet. The refrigerant introduced from 120 flows along the side of the stator core 11 to one side and the other side of the stator 10, passes through the first stator fixing ring 150, passes through the coil 12, and passes through the refrigerant outlet. It is formed to flow out through (130).

As described above, when the refrigerant inlet 120, the refrigerant outlet 130, etc. are formed, the refrigerant may be distributed and introduced through the plurality of refrigerant inlets 120, and each of the introduced refrigerants is the second stator. Since it can be moved to each refrigerant flow path 140 formed to individually cool each of the stators 10 spatially separated by the fixing ring 160, the refrigerant moves along the shortened refrigerant flow path 140 While doing it, the stator core 11, the coil 12, and the like can be cooled.

2, a plurality of refrigerant inlets 120 are formed adjacent to the second stator fixing ring 160 supporting each stator 10, and a motor housing corresponding to a position between each stator 10 When the refrigerant outlet 130 is formed at the position of 110, the introduced refrigerant is blocked by the second stator fixing ring 160 so that it cannot flow between each stator 10, and the outer surface of the stator core 11 It can absorb heat such as the stator core 11 while flowing along. Subsequently, the refrigerant may flow toward the coil 12 through the hole (not shown) of the first stator fixing ring 150 and pass through the coil 12, etc., thereby passing through each stator 10 and transferring heat. The absorbed refrigerant may be combined at positions between the respective stators 10 and discharged to the refrigerant outlet 130.

When the refrigerant passage 140 as described above is formed, the refrigerant can be individually introduced into each stator 10 to cool and discharge the stator 10, so even if the stator 10 is provided separately The stator 10 can be cooled in a balanced manner.

On the other hand, the refrigerant hermetically accommodated in the motor housing 110 is vaporized to a gas at a certain temperature or higher and liquefied to a liquid at a certain temperature or lower, and has insulation, non-flammability, and non-explosiveness so that it can be immersed in the motor housing 110. A material that can be used may be used. In general, refrigerants such as R-22 and R-134a, which are used in refrigerators, may be used, and CO2 refrigerants having flammability and explosive properties cannot be used.

R-22 is a kind of freon refrigerant, and its refrigeration capacity is the best among freon refrigerants, and it can be widely used from small devices to large devices. In particular, it is mainly used for reciprocating air conditioners, and may also be used in a low-temperature refrigeration device. However, the freon refrigerant destroys the ozone layer and affects global warming, and when moisture penetrates, it has corrosiveness to metals.

In addition, 134a is a refrigerant developed as an alternative refrigerant for R-12 and has a colorless, transparent, non-flammable property. It is mainly used for refrigerators and automobile air conditioners, and it does not contain chlorine in its molecules, so there is no ozone depletion index, but the global warming index is high.

The refrigerant used is 1. The evaporation power is higher than atmospheric pressure and the condensation power is low at room temperature, 2. The latent heat of evaporation is large, the specific heat in the liquid state is small, 3. It is chemically stable 4. It has high thermal conductivity 5. It is inert metal There is no hyperchemical reaction. 6. High electrical resistance, good insulation 7. No flammability and explosiveness, 8 Refrigerants that do not affect or minimize ozone layer collapse and global warming can be used.

Due to the characteristics of refrigerants such as R-22 and R-134a, the refrigerant vaporizes from liquid to gas and can absorb a lot of heat. The refrigerant flowing into the refrigerant inlet 120 is the stator 10 within the motor housing 110. As the heat of the lamp is absorbed and discharged through the refrigerant outlet 130, it may be cooled by absorbing the heat by directly or indirectly contacting the heating unit inside the motor housing 110.

The first stator fixing ring 150 is provided at one end of the stator 10 to support the stator 10 and is formed so that the refrigerant introduced from the refrigerant inlet 120 passes.

The first stator fixing ring 150 has an open hole (not shown) so that the refrigerant introduced through the refrigerant inlet 120 absorbs heat from the stator core 11 and flows toward the coil 12. Since is formed, the refrigerant may pass through the first stator fixing ring 150 through a hole (not shown) or the like.

In addition, the first stator fixing ring 150 is coupled to one end of the stator 10 to support the stator 10 so that the stator 10 can be immersed in the refrigerant and coupled to the motor housing 110, and As shown in FIG. 2, when the stator 10 is formed separately, a plurality of stators 10 may be provided so as to support each stator 10 at one end thereof.

The second stator fixing ring 160 is provided at the other end of the stator 10 to support the stator 10, and is formed so that the refrigerant passing through the coil 12 flows to the refrigerant outlet 130.

The second stator fixing ring so that the refrigerant passing through the coil 12 and absorbing heat does not move to the refrigerant inlet 120 formed adjacent to the second stator fixing ring 160 and flows out to the refrigerant outlet 130 ( 160) may be formed in a closed shape.

In addition, the second stator fixing ring 160 is coupled to the other end of the stator 10 to support the stator 10 so that the stator 10 can be immersed in the refrigerant and coupled to the motor housing 110, and As shown in FIG. 2, when the stator 10 is formed separately, a plurality of stators 10 may be provided so as to support each stator 10 at one end thereof.

At least one pressure regulator 170 is provided to adjust the internal pressure of the motor housing 110 and is formed on the outer surface of the motor housing 110.

When the refrigerant flow path 140 is formed, the refrigerant individually flows into the stator 10 so that the refrigerant flows along the refrigerant flow path 140 to cool and discharge the stator 10. During this process, the internal The internal pressure of the motor housing 110 may be rapidly increased by the refrigerant phase-changed to a gaseous state by heat generated from the stator 10.

Since the pressure regulator 170 is provided in the form of a solenoid valve on the outer surface of the motor housing 110, when the internal pressure of the motor housing 110 rises rapidly and reaches a certain pressure or more, the pressure regulator ( When 170 is opened and returned to a predetermined pressure or lower, the pressure regulator 170 is closed, thereby preventing a rapid increase in the internal pressure of the motor housing 110 and maintaining the internal pressure constant.

In the above description, various embodiments of the present invention have been presented and described, but the present invention is not necessarily limited thereto, and those of ordinary skill in the art to which the present invention pertains, within the scope of the technical spirit of the present invention. It will be easy to see that branch substitutions, modifications and changes are possible.

Claims

In a turbo motor comprising a stator core and a coil provided with a power supply to generate magnetic force, and a rotor rotating by magnetization of the stator,

A motor housing formed to be spaced apart from the outer circumferential surface of the rotor, sealingly receiving a refrigerant, and immersing the stator in the refrigerant to be coupled therein,

A refrigerant inlet formed through the outer surface of the motor housing and through which refrigerant flows into the motor housing;

A refrigerant outlet formed through the outer surface of the motor housing and through which refrigerant flows out of the motor housing;

A refrigerant flow path provided inside the motor housing and formed to cool the stator while the refrigerant flows

Including,

The refrigerant inlet is formed in plural, and is provided so that the refrigerant is separated and introduced into the stator,

The refrigerant outlet is formed at least one between the refrigerant inlet and is provided so that the separated and introduced refrigerant is combined to flow out of the motor housing,

A first stator fixing ring provided in plural at both ends of the stator to support the stator and configured to pass the introduced refrigerant,

A second stator fixing ring provided in plural at the center of the stator to support the stator, and configured to flow the refrigerant passing through the coil to the refrigerant outlet

Turbo motor capable of high-efficiency cooling through hermetic cooling of the stator comprising a.
The method of claim 1,

A first stator fixing ring provided at one end of the stator to support the stator, and configured to pass the refrigerant introduced from the refrigerant inlet,

A second stator fixing ring provided at the other end of the stator to support the stator, and configured to flow the refrigerant passing through the coil to the refrigerant outlet

Turbo motor capable of high-efficiency cooling through hermetic cooling of the stator comprising a.
The method of claim 2,

The refrigerant flow path,

The refrigerant introduced from the refrigerant inlet flows along the side of the stator core, passes through the first stator fixing ring, passes through the coil, and flows out through the refrigerant outlet.

Turbo motor for high-efficiency cooling through sealed cooling of the stator.
The method of claim 1,

The refrigerant flow path,

The refrigerant introduced from the refrigerant inlet flows to one side and the other side of the stator along side surfaces of the stator core, passes through the first stator fixing ring, passes through the coil, and flows out through the refrigerant outlet.

Turbo motor for high-efficiency cooling through sealed cooling of the stator.
The method according to claim 3 or 4,

A pressure regulator formed on the outer surface of the motor housing and provided with at least one to adjust the internal pressure of the motor housing

Turbo motor capable of high-efficiency cooling through sealed cooling of the stator comprising a.