KR20100045428A - The cooling system for linear motor using rankine cycle - Google Patents

The cooling system for linear motor using rankine cycle Download PDF

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Publication number
KR20100045428A
KR20100045428A KR1020100033053A KR20100033053A KR20100045428A KR 20100045428 A KR20100045428 A KR 20100045428A KR 1020100033053 A KR1020100033053 A KR 1020100033053A KR 20100033053 A KR20100033053 A KR 20100033053A KR 20100045428 A KR20100045428 A KR 20100045428A
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KR
South Korea
Prior art keywords
refrigerant
coil unit
linear motor
condenser
pipe
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KR1020100033053A
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Korean (ko)
Inventor
임재현
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임재현
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Application filed by 임재현 filed Critical 임재현
Priority to KR1020100033053A priority Critical patent/KR20100045428A/en
Publication of KR20100045428A publication Critical patent/KR20100045428A/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/14—Arrangements for cooling or ventilating wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle
    • H02K9/16—Arrangements for cooling or ventilating wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle wherein the cooling medium circulates through ducts or tubes within the casing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
    • F02B39/02—Drives of pumps; Varying pump drive gear ratio
    • F02B39/08—Non-mechanical drives, e.g. fluid drives having variable gear ratio
    • F02B39/085—Non-mechanical drives, e.g. fluid drives having variable gear ratio the fluid drive using expansion of fluids other than exhaust gases, e.g. a Rankine cycle
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/40—Solar thermal energy, e.g. solar towers
    • Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Linear Motors (AREA)

Abstract

PURPOSE: A linear motor cooling device is provided to improve energy efficiency using waste heat and gravity as refrigerant circulation energy. CONSTITUTION: A coil unit refrigerant jacket(31) comprises a refrigerant receiving space, a liquid refrigerant inlet, a gas refrigerant outlet(34), and a lead line drawing device(35). A plurality of coil units is arranged in the liquid refrigerant receiving space. A condenser(41) has a refrigerant circulation path. A gas pipe(42) connects the gas refrigerant outlet with the condenser. A liquid pipe(43) connects the liquid refrigerant inlet with the condenser. The refrigerant is heated by the waste heat transmitted from a plurality of coil units. The refrigerant is a Freon refrigerant, a natural refrigerant, or a liquid gas.

Description

Linear motor cooling system using Rankine cycle {The cooling system for linear motor using Rankine cycle}

Linear motor cooling field

Although the operation of the equipment by the motor is often used in industrial sites or life processes, when a rotary motor is used, a device that converts the rotational movement into a linear movement should be added where a linear movement is required. do. Therefore, the advantage of linear motors that produce linear motion is highlighted, so large thrust / high speed linear motors are required. However, eliminating heat generated from linear motors has emerged as a core technology that determines the performance of linear motors. The cooling method of the linear motor is mainly air cooled by compressed air (10-0339914, the cooling device of the linear motor), and the water cooling method has recently appeared (10-0873001, the linear motor and its manufacturing method and the linear motor). Stage apparatus), and a cooling apparatus (10-0441227, a linear motor cooling apparatus) using a heat pipe were also invented.

In the present invention, in the linear motor cooling, the refrigerant natural circulation method which uses the waste heat generated in the coil part and the object of cooling as the refrigerant circulation energy is used. In order to increase the contact area between the refrigerant and the coil part, the coil part is immersed in the refrigerant jacket in which the refrigerant is accommodated. In order to eliminate corrosion, insulation breakdown, etc., which are a concern in water cooling, use a refrigerant that does not damage the coil part. The condenser that condenses the refrigerant is arranged in various ways to expand the application of the cooling method.

In the cooling of the linear motor, a refrigerant jacket with a sealed structure surrounding the coil unit is made, and the coil unit is put in the inside thereof, and the inside is filled with a refrigerant that can be boiled by the heat generated from the coil unit to cool the coil unit with the heat of vaporization of the refrigerant. The vaporized refrigerant removes heat to the outside by condensing in the condenser, which forms a closed circuit with the refrigerant jacket and piping.

    Many machines perform linear motion by using the power of motor in industrial field or life process. Belt or gear is used in the rotary motor to convert it into linear motion, but in this process, energy loss due to motion conversion occurs. Therefore, the advantage of linear motors that produce linear motion is highlighted, so large thrust / high speed linear motors are required. However, eliminating heat generated from linear motors has emerged as a core technology that determines the performance of linear motors. Up to now, the linear motor cooling method has been invented by air cooled, water cooled, and heat pipes using compressed compressed air, but has many advantages and disadvantages, and thus has limited utility.

In the present invention, a refrigerant jacket is formed to surround the coil unit 22 so as to be immersed in the refrigerant, and a refrigerant that can be boiled by the heat generated from the coil unit 22 is put therein to cool the coil unit 22 with the refrigerant vaporization heat. In addition, the heat dissipating condenser can be installed away from the linear motor, eliminating the effects of cooling noise and cooling air. In addition, by circulating the refrigerant using waste heat and gravity to be discarded, it is very effective because no additional energy is used in the refrigerant circulation.

1 is a structural explanatory diagram of a conventional double-sided linear motor / one-sided linear motor.
Figure 2 is a detailed description of the conventional water-cooled linear motor coil unit.
3 is a detailed diagram illustrating the coil unit to be applied to the present invention.
4 is an explanatory diagram of a linear motor cooling apparatus utilizing the present invention Rankine cycle.
5 is a diagram illustrating a case in which a heat exchanger condenser is applied.
6 is a diagram illustrating a case where a coil split refrigerant jacket is applied.

    1 is a structural explanatory diagram of a conventional double-sided linear motor / one-sided linear motor. The figure on the left side is an explanatory diagram of a two-sided linear motor, and the figure on the right is an explanatory diagram of a one-sided linear motor. The linear motor is largely composed of a stator 11 and a mover 12. The stator 11 is installed in the stator frame 13 such that the stator magnets 14 alternately show N and S poles. The mover 12 is composed of a coil part provided with a predetermined gap with the stator magnet 14 of the stator 11 and a mover frame 16 attached to the coil part and installed at an upper portion thereof. The coil portion is composed of a coil 15 and a coil protective material 17. The principle of operation is as follows. When power is applied to the coil 15 of the mover 12, magnetic flux is generated by the coil 15, and the magnetic force is generated by the attraction force and the repulsive force between the magnetic flux and the stator magnet 14 attached to the stator 11. 12) is a linear motion. At this time, heat is generated in the coil 15 of the mover. However, when the linear motor is subjected to high output operation, high speed operation, or the like, a large amount of heat is generated in the coil 15 due to the large current flowing through the coil 15.

    Figure 2 is a detailed description of the conventional water-cooled linear motor coil unit. In a relatively recent invention, the mold 23 is formed on the surface of the coil unit 22 composed of the coil and the core, and the outer surface of the coil unit 22 is coated with a glass film 24 to prevent water from penetrating the coil unit 22. do. In addition, the coil part 21 is formed by wrapping the outside with a cover member 26 so that the cooling water flow path 25 is secured between the mold 23 and the coil unit 22 protected by the glass film 24. It is considered that the formation of the cooling water flow passage 25 in the form of wrapping the coil unit 22 is very effective for increasing the heat exchange area. However, the installation of the mold 23 and the glass film 24 outside the coil unit 22 due to the concern of corrosion and insulation breakdown due to the use of cooling water reduces the heat exchange ability, complicates the fabrication structure, and causes a cost increase. There is this. There is also a disadvantage that the cooling water must be forced to circulate. In addition, corrosion, water moss, and freezing caused by cooling water may seriously impair cooling.

    3 is a detailed diagram illustrating the coil unit to be applied to the present invention. In the present invention, there is no problem such as corrosion, breakdown, freezing, etc., and a refrigerant that can be boiled by heat generated in the coil unit 22 is used. In particular, the freon refrigerant has no problems such as corrosion, dielectric breakdown, freezing, etc., and since it has many kinds of boiling points, it is used in the present invention. If the refrigerant does not have problems such as corrosion, dielectric breakdown, and freezing, the mold 23 and the glass film 24 may be removed in FIG. 2. Therefore, a coil unit refrigerant jacket 31 having a sealed structure surrounding the coil unit 22 is installed. A refrigerant accommodating space 32 is formed between the coil unit 22 and the coil unit refrigerant jacket 31 and filled with a refrigerant (not shown). The liquid refrigerant inlet 33 is installed to pass through the lower side of the coil unit refrigerant jacket 31 and the gas refrigerant outlet 34 is installed to pass through the upper side of the coil unit refrigerant jacket 31. A lead wire drawing device 35 is installed at one lower side of the coil unit refrigerant jacket 31 to draw the lead wire 36 for supplying power to the coil unit 22 while maintaining airtightness. The coil unit refrigerant jacket 31 may be changed into various shapes according to various coil unit 22 structures. A plurality of interval reinforcing materials (not shown) are installed between the coil unit 22 and the coil unit refrigerant jacket 31 to recirculate the refrigerant while allowing the refrigerant to circulate. Since the coil unit 22 directly contacts the refrigerant, the heat exchange area is wide, and when the refrigerant receives heat, the coil unit 22 swings and moves, and thus the heat exchange efficiency is very high. Refrigerant, especially freon refrigerant, has been proved through numerous experiments to ensure that the enameled wire is not damaged. There is no fear of freezing due to its excellent insulation and low freezing point.

    4 is an explanatory diagram of a linear motor cooling apparatus utilizing the present invention Rankine cycle. In the two-sided linear motor / one-sided linear motor is a sealed structure containing a plurality of coil units 22 therein and having a refrigerant receiving space 32, the liquid refrigerant inlet 33 is installed on one side of the lower side and the upper side A gas coolant outlet 34 is provided, and a coil unit refrigerant jacket 31 in which a lead wire drawing device 35 is installed to draw the lead wire 36 supplying power to the coil unit 22 while keeping the airtight on the lower side thereof. To form. A condenser 41 having a refrigerant circulation passage is installed on the coil unit refrigerant jacket 31. A cooling fan (not shown) may be installed in the condenser 41 to provide wind, and a plurality of cooling fins may be provided to increase the cooling area. Can be installed. The upper gas refrigerant outlet 34 of the coil unit refrigerant jacket 31 and the upper outlet pipe of the condenser 41 are connected to each other through the gas pipe 42, and the liquid refrigerant inlet 33 and the condenser of the lower coil unit refrigerant jacket 31 are connected to each other. (41) Connect the lower outlet pipe to penetrate the liquid pipe 43 to each other. The condenser 41 is vacuumed by filling a refrigerant (not shown) that can be boiled by waste heat received from the coil unit 22 accommodated in the coil unit refrigerant jacket 31 and heating the refrigerant (not shown) to discharge air. Be sure to Gas pipe 42 One side of the upper pipe can be provided with a gas outlet 44 with a valve to discharge the internal air. The gas outlet 44 may be provided with a function to discharge pressure at a predetermined pressure or more. Refrigerant (not shown) is also included in the scope of the present invention to use one of the Freon refrigerant, natural refrigerant, liquefied gas. The present invention can be applied to both the double-sided linear motor and the single-sided linear motor. The condenser 41 may be installed at one side of the mover frame 16 or may be installed at a separate place by extending the gas pipe 42 and the liquid pipe 43, and as the gas pipe 42 and the liquid pipe 43. Flexible tubes can also be used. The principle of operation is as follows. When heat is generated in the coil unit 22, the refrigerant (not shown) filled in the coil unit refrigerant jacket 31 receives heat from the coil unit 22 to vaporize and cool the coil unit 22 by evaporative latent heat. The gas refrigerant vaporized in the coil unit refrigerant jacket 31 flows into the condenser 41 through the gas pipe 42 to dissipate heat, and the refrigerant (not shown), which is liquefied and turned into liquid, opens the liquid pipe 43 by gravity. As it flows back into the coil unit refrigerant jacket 31 underneath, it completes one cycle of cooling. Since the circulation of the refrigerant is made by the waste heat and gravity of the coil unit 22, it is a natural circulation method. Since the circulation speed of the refrigerant is determined by the excessive heat of the coil unit 22, it is a very efficient cooling system. That is, the coil unit 22 is a heat source, the coil unit refrigerant jacket 31 corresponds to a boiler, and the condenser 41 may be regarded as a kind of refrigerant Rankine cycle corresponding to a plurality of reactors, and is compliant with the second law of thermodynamics so that separate circulation is performed in the refrigerant circulation. No device needed.

    5 is a diagram illustrating a case in which a heat exchanger condenser is applied. FIG. 5 is characterized in that the heat exchanger condenser 51 is installed as the condenser 41 in FIG. The heat exchanger type condenser 51 has separate primary cooling spaces and secondary cooling spaces formed to exchange heat with each other. The refrigerant vaporized from the coil unit refrigerant jacket 31 circulates in the primary cooling space of the heat exchanger condenser 51, and the cooling fluid that supplies cooling heat from the cold heat source 52 to the secondary cooling space of the heat exchanger condenser 51 (not shown). O) cycle. Secondary cooling space of the heat exchanger condenser 51 and the cooling heat source 52 is connected to the upper side through the upper pipe 54 and the lower side through the lower pipe 53 connected to the cooling fluid made in the cold heat source 52 (not shown) ) Forms a closed circuit to circulate to the secondary cooling space of the heat exchanger condenser (51). The closed circuit connecting the cold heat source 52 and the secondary cooling space of the heat exchanger condenser 51 is one of a refrigerating circuit, a cold water circuit, and a cold air circuit. The upper pipe 54 and the lower pipe 53 may be installed as a flexible pipe. The principle of operation is as follows. The refrigerant (not shown) vaporized in the coil unit refrigerant jacket 31 enters the heat exchanger condenser 51 primary cooling space, and the cooling fluid (not shown) cooled in the cold heat source 52 is the heat exchanger condenser 51. When it enters the secondary cooling space of the heat exchanger condenser 51 to maintain the vacuum state by cooling and condensed vaporized refrigerant (not shown) in the primary cooling space of the refrigerant in the coil unit refrigerant jacket 31 to continue the refrigerant (not shown) The vaporization heat is used to cool the coil unit 22 inside the coil unit refrigerant jacket 31 with the heat of vaporization. Lowering the temperature of the cold heat source 52 can be strongly cooled.

     6 is a diagram illustrating a case where a coil split refrigerant jacket is applied. The coil unit refrigerant jacket 31 covering the entire coil unit 22 used in one linear motor may be made, but for ease of maintenance, the entire coil unit 22 used in one linear motor may be divided into a plurality of parts. A plurality of coil split refrigerant jackets 61 can be formed. In this case, the lower refrigerant header 62 is installed below the plurality of coil split refrigerant jackets 61 and the upper refrigerant header 63 is installed on the upper coil split refrigerant jacket 61. The liquid refrigerant inlet 33 and the lower refrigerant header 62 of each coil split refrigerant jacket 61 are connected to each other so as to pass through the pipe. A gas refrigerant outlet 34 of each coil split refrigerant jacket 61 and an upper refrigerant header 63 are connected to each other so as to pass through the pipe. The upper refrigerant header 63 and the condenser 41 upper outlet pipe are connected to each other through the gas pipe 42, and the lower refrigerant header 62 and the condenser 41 lower outlet pipe are mutually penetrated to the liquid pipe 43. Connect. The rest of the description is the same as in FIG.

11 stator 12 mover
13: stator frame 14: stator magnet
15 coil 16: mover frame
17 coil protection material 21 coil portion
22 coil unit 23 mold
24: glass film 25: cooling water flow path
26: cover member 31: coil unit refrigerant jacket
32: refrigerant receiving space 33: liquid refrigerant inlet
34 gas coolant outlet 35 lead wire drawing device
36: lead wire 41: condenser
42: gas piping 43: liquid piping
44 gas outlet 51 heat exchanger condenser
52: cold heat source 53: lower piping
54: upper piping 61: coil split refrigerant jacket
62: lower refrigerant header 63: upper refrigerant header

Claims (6)

      In the two-sided linear motor / one-sided linear motor is a sealed structure containing a plurality of coil units 22 therein and having a refrigerant receiving space 32, the liquid refrigerant inlet 33 is installed on one side of the lower side and the upper side A gas coolant outlet 34 is provided, and a coil unit refrigerant jacket 31 in which a lead wire drawing device 35 is installed to draw the lead wire 36 supplying power to the coil unit 22 while keeping the airtight on the lower side thereof. and; A condenser 41 having a refrigerant circulation passage disposed above the coil unit refrigerant jacket 31; A gas pipe 42 connecting the coil unit refrigerant jacket 31 to the upper gas refrigerant outlet 34 and the upper outlet pipe of the condenser 41; A liquid pipe 43 connecting the lower liquid refrigerant inlet 33 of the coil unit refrigerant jacket 31 to the lower outlet pipe of the condenser 41; A linear motor cooling apparatus utilizing a Rankine cycle, comprising a refrigerant (not shown) that can be boiled by waste heat received from a coil unit 22 accommodated in a coil unit refrigerant jacket 31.       The linear motor cooling apparatus using a Rankine cycle according to claim 1, wherein a gas outlet port (44) having a valve is installed at one side of the upper gas pipe (42) to discharge the internal air.       The linear motor cooling apparatus using a Rankine cycle according to claim 1, wherein one of a freon refrigerant, a natural refrigerant, and a liquefied gas is used as the refrigerant (not shown).       The linear motor cooling apparatus using a Rankine cycle according to claim 1, wherein the condenser is installed at one side of the mover frame.       The linear motor cooling apparatus using a Rankine cycle according to claim 1, wherein a flexible pipe is used as the gas pipe (42) and the liquid pipe (43).       According to claim 1, wherein the condenser 41 is a heat exchanger condenser 51 having a separate primary cooling space and a secondary cooling space formed so as to heat exchange with each other, the secondary cooling space and the heat source of the heat exchanger condenser 51 ( 52 is connected to the upper side through the upper pipe 54 and the lower side through the lower pipe 53 so that the cooling fluid (not shown) made in the cold heat source 52 is circulated to the secondary cooling space of the heat exchanger condenser 51. Linear motor cooling apparatus utilizing a Rankine cycle, characterized in that to form a closed circuit so that it can be.
KR1020100033053A 2010-04-11 2010-04-11 The cooling system for linear motor using rankine cycle KR20100045428A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115955018A (en) * 2022-01-10 2023-04-11 襄阳中车电机技术有限公司 Stator core and cooling system of linear motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115955018A (en) * 2022-01-10 2023-04-11 襄阳中车电机技术有限公司 Stator core and cooling system of linear motor

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