JP2018110473A - Rotary machine motor, rotary machine and manufacturing method of rotary machine motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary machine motor which enables protection against corrosive substance such as ammonia with simple and inexpensive means.SOLUTION: A motor for driving a rotary machine using corrosive gas as working fluid comprises: a rotor; a housing for housing a rotor part of the rotary machine and the rotor; a mold material arranged on an outer peripheral side of the rotor inside the housing and formed of anticorrosive resin having resistance against the corrosive gas; and a stator comprising a stator core fixed inside the housing and copper winding embedded in the mold material and installed in the stator core.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to a rotary machine motor, a rotary machine, and a method of manufacturing a rotary machine motor.

  As a drive device for a compressor used in a refrigerator using ammonia as a refrigerant, a motor having a hermetic sealing structure integrated with the compressor is used to prevent leakage of ammonia. In addition, as a winding constituting the stator of the motor, aluminum having no problem of corrosion due to ammonia is used as a conductor, and the aluminum conductor is coated with a fluorine resin material having excellent chemical resistance and high insulation resistance as a coating material. Aluminum winding is used.

  Patent Documents 1 and 2 disclose that, in a refrigerator using ammonia as a refrigerant, an aluminum winding coated with a fluororesin material is used as a winding constituting a stator of a motor for a rotary machine such as a compressor. Has been.

JP 2003-184775 A JP 2004-056990 A

An aluminum wire used as a winding is more expensive than a copper wire, has poor flexibility, and is difficult to automatically wind like a copper wire, so that the efficiency of the work of winding around a stator is lowered. Further, since the electric resistance loss is larger than that of the copper wire, there is a problem that the motor efficiency is lowered and the wire diameter needs to be increased, and the outer diameter of the motor is increased.
In addition, since the fluororesin material used as a coating material for windings has poor wettability with respect to many materials, it is difficult to cover and protect the surface of the winding with a material that is resistant to corrosive substances. is there.

  At least one embodiment aims at solving the above-mentioned problem and proposing a motor for a rotating machine capable of protecting against a corrosive substance such as ammonia with a simple configuration.

(1) A motor for a rotary machine according to at least one embodiment,
A motor for driving a rotating machine using corrosive gas as a working fluid,
A rotor,
A housing for housing the rotor part of the rotating machine and the rotor;
A molding material provided on the outer peripheral side of the rotor inside the housing and formed of a corrosion-resistant resin having resistance to the corrosive gas;
A stator core fixed to the inside of the housing, and a stator including a copper winding attached to the stator core;
With
At least the winding of the stator is covered with the mold material.
The

  According to the configuration of (1) above, at least the copper winding is covered with the molding material formed of the corrosion-resistant resin, so that the copper winding can be protected against a corrosive substance for a long period of time. Moreover, a winding can be protected by a simple and low-cost means by covering a copper winding with the said mold material.

Unlike aluminum lead wires that only have a choice of fluororesin as a covering material, copper windings are made of a wide variety of polymer materials such as polyurethane, polyester, and polyimide, which are commonly used as magnet wires. It can be used. For this reason, it is possible to select a coating material with good wettability with respect to the mold material, and by using a coating material with good wettability with respect to the mold material, the adhesiveness between the solidified mold material and winding Therefore, the fixing strength of the winding and the strength of the entire stator including the winding and the mold are improved, and the protection effect against the corrosive gas and the durability of the motor are improved. Furthermore, since the contact thermal resistance between the winding and the mold decreases due to the adhesive effect, the heat dissipation of the winding is improved and the temperature rise can be suppressed.
Here, “adhesiveness” refers to a state of being bonded by a mechanical, physical, or chemical method.

(2) In one embodiment, in the configuration of (1),
The mold material is formed of an olefin-based thermosetting resin.
According to the configuration of (2) above, by using an olefin-based thermosetting resin having a low liquid viscosity at the time of casting as the molding material, it is possible to prevent the resin from entering the gap between the windings and generating a cavity in the mold. And the adhesiveness of the mold material and winding after hardening can be improved. Thereby, the protection effect of the winding with respect to corrosive gas can be heightened.
Here, “adhesiveness” refers to a state in which there is no gap.

(3) In one embodiment, in the configuration of (1) or (2),
The linear expansion coefficient of the mold material is 1.0 × 10 ⁻⁵ / K or more and 2.0 × 10 ⁻⁵ / K or less.
According to the configuration of (3) above, due to the difference in the linear expansion coefficient between the winding and the molding material, such as when the motor generates heat when using the motor, by using a molding material having a linear expansion coefficient close to that of the copper winding. Both peeling can be suppressed.
Note that a filler may be added to the molding material to obtain the linear expansion coefficient.

(4) In one embodiment, in any one of the configurations (1) to (3),
The specific electric resistance of the copper winding is 2.0 μΩ · cm or less.
According to the configuration of (4) above, by using a copper winding having a specific electric resistance of 2.0 μΩ · cm or less, the electric resistance loss can be reduced, the motor efficiency can be improved, and the electric resistance loss can be reduced. Since the segment diameter can be reduced, the outer diameter of the motor can be reduced.

(5) In one embodiment, in any one of the configurations (1) to (4),
Terminals provided in the housing;
An aluminum lead wire connected to the winding inside the mold material and electrically connecting the winding and the terminal;
Is provided.
According to the configuration of (5) above, the copper winding is embedded in a molding material formed of a corrosion-resistant resin, and an aluminum winding having corrosion resistance against ammonia is used outside the molding material. Thus, the durability of the lead wire can be secured.

(6) In one embodiment, in any one of the configurations (1) to (5),
The stator is fixed to the inner surface of the housing;
The corrosion resistant resin is disposed so as to cover the entire stator including the winding.
According to the structure of said (6), the whole stator including a winding can be protected from corrosive gas by arrange | positioning so that the whole stator including a winding may be covered with the molding material formed with corrosion-resistant resin. .

(7) In one embodiment, in any one of the configurations (1) to (5),
The corrosion-resistant resin does not penetrate the corrosive gas.
According to the structure of said (7), a winding can be protected from corrosive gas by using corrosion-resistant resin which does not permeate | transmit corrosive gas as a mold material.

(8) The rotating machine according to at least one embodiment is:
A motor having any one of the constitutions (1) to (7);
A rotor configured to rotate by being driven by the motor;
A housing for housing the rotor and stator of the motor, and the rotor portion;
Is provided.
According to the configuration of (8) above, it is possible to realize a rotating machine that can protect a copper winding of a motor against corrosive gas at a low cost over a long period of time.

(9) A method for manufacturing a motor for a rotary machine according to at least one embodiment is as follows:
A method of manufacturing a motor for driving a rotary machine using corrosive gas as a working fluid,
A stator mounting step for mounting a stator including a copper winding inside the housing;
A mold placement step of placing a mold inside the housing;
A casting step of injecting and solidifying the corrosion-resistant resin into a casting space inside the mold so that at least the winding is covered with the corrosion-resistant resin having resistance to the corrosive gas;
Is provided.

  According to the method of (9) above, a rotary machine capable of protecting a copper winding against corrosive gas over a long period of time by embedding the copper winding in a mold material formed of the corrosion-resistant resin. Can be manufactured easily and at low cost.

(10) In one embodiment, in the method of (9),
In the casting step,
The viscosity of the corrosion-resistant resin before solidification is adjusted to 300 mPa · s or more and 3000 mPa · s or less.
According to the method of (10) above, by using a corrosion-resistant resin having a viscosity before solidification of 300 to 3000 mPa · s, the molding material enters into the minute gaps of the winding and the stator, and the gaps and cavities inside the molding material Therefore, the adhesion between the corrosion-resistant resin and the copper winding can be improved, and the durability of the winding against a corrosive gas such as ammonia can be further improved by the mold material after curing.

(11) In one embodiment, in the method of (9) or (10),
A lead wire connecting step of connecting an aluminum lead wire to the copper winding;
In the casting step,
The corrosion resistant resin is molded such that a connection portion between the copper winding and the aluminum lead wire is embedded in the corrosion resistant resin.
According to the above method (10), the copper wire that is easily corroded by the corrosive gas is embedded in the corrosion-resistant resin, and the aluminum lead wire that is resistant to the corrosive gas outside the corrosion-resistant resin. It can be.

(12) In one embodiment, in any one of the methods (9) to (11),
In the casting step,
The method further includes a depressurizing step of depressurizing the casting space formed inside the mold.
According to the method of (12), by reducing the pressure of the casting space in the casting step, the air bubbles inside the mold material before solidification can be removed, and the resin can be spread over the entire space portion of the stator including the windings. It is possible to further improve the adhesion between the winding and the resin. As a result, voids inside the mold material after curing are reduced, and the mechanical strength of the mold material and the fixing force of the winding are improved, so that the durability of the motor is improved. Further, the apparent thermal conductivity of the mold material is increased due to the reduction of the cavity inside the mold material, and at the same time the adhesion between the wire and the mold material is improved, so that the heat dissipation of the winding is improved. Furthermore, since the cavity containing the air does not remain in the mold material, it is possible to prevent the destruction of the mold, the peeling of the mold material and the winding due to the change of the gas pressure, and the entry of the corrosive substance into the mold.

(13) In one embodiment, in the method of (12),
The upper space of the mold is set as a sealed space, and the upper end of the casting space is communicated with the sealed space, so that the sealed space is decompressed.
According to the above method (13), the upper space of the mold is made a sealed space, the upper end of the casting space is communicated with the sealed space, and the sealed space is decompressed, so that the sealed space can be decompressed at low cost. It can be done easily.

(14) In one embodiment, in any one of the methods (9) to (13),
In the stator mounting step,
The stator core of the stator is attached to the housing by shrink fitting.
According to the method (14), the stator can be fixed to the housing easily and at low cost.

  According to at least one embodiment, it is possible to protect a motor for a rotary machine with a simple and low-cost means against corrosive substances such as ammonia.

It is a longitudinal cross-sectional view of the motor for rotary machines which concerns on one Embodiment. It is a longitudinal cross-sectional view of the motor for rotary machines which concerns on one Embodiment. It is process drawing of the manufacturing method of the motor for rotary machines which concerns on one Embodiment. It is sectional drawing which shows the manufacturing apparatus of the motor for rotary machines which concerns on one Embodiment.

Hereinafter, some embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in the embodiments or shown in the drawings are not intended to limit the scope of the present invention, but are merely illustrative examples.
For example, expressions expressing relative or absolute arrangements such as “in a certain direction”, “along a certain direction”, “parallel”, “orthogonal”, “center”, “concentric” or “coaxial” are strictly In addition to such an arrangement, it is also possible to represent a state of relative displacement with an angle or a distance such that tolerance or the same function can be obtained.
For example, an expression indicating that things such as “identical”, “equal”, and “homogeneous” are in an equal state not only represents an exactly equal state, but also has a tolerance or a difference that can provide the same function. It also represents the existing state.
For example, expressions representing shapes such as quadrangular shapes and cylindrical shapes represent not only geometrically strict shapes such as quadrangular shapes and cylindrical shapes, but also irregularities and chamfers as long as the same effects can be obtained. A shape including a part or the like is also expressed.
On the other hand, the expressions “comprising”, “comprising”, “comprising”, “including”, or “having” one constituent element are not exclusive expressions for excluding the existence of other constituent elements.

The motor 10 for rotary machines which concerns on one Embodiment is a motor for driving the rotary machine 50 (50A, 50B) which uses corrosive gas as a working fluid, as shown in FIG.1 and FIG.2. Inside the housing 16, the rotor 12 and the stator 14 are accommodated, the rotor 12 is disposed at the center, and the stator 14 is disposed around the rotor 12. The stator 14 has a stator core 14a fixed to the inside of the housing 16, and a copper winding 14b attached to the stator core 14a.
A molding material 20 is formed of a corrosion-resistant resin having resistance to corrosive gas on the outer peripheral side of the rotor 12 inside the housing 16, and the winding 14 b is embedded in the molding material 20.

According to the above configuration, since the winding 14b is covered with the molding material 20 inside the housing 16, the copper winding 14b can be protected against a corrosive gas such as ammonia over a long period of time. Further, the winding wire 14b can be protected by simple and low-cost means for covering the copper winding wire 14b with the molding material 20. Moreover, the motor 10 for rotary machines can be reduced in cost by using the copper winding 14b.
Furthermore, as described above, since the copper winding 14b can easily obtain a coating material with good wettability, protection against corrosive gas is easy.

In one embodiment, for example, an epoxy resin, a silicon resin, an unsaturated polyester resin (BMC), a thermoplastic polyester resin (PET), or the like can be used as the material of the molding material 20.
In one embodiment, the corrosive gas is an ammonia-based refrigerant, and the rotating machine 50 is a compressor or an expander incorporated in a refrigerator or the like that uses the ammonia-based refrigerant.
In one embodiment, the copper winding 14b is coated with a coating, such as enamel.
In one embodiment, it is preferable that the molding material 20 has a property that does not substantially permeate the corrosive gas or hardly permeate the corrosive gas. Thereby, the protective effect of the winding 14b can be improved.

In one embodiment, as shown in FIGS. 1 and 2, in the rotary machine motor 10, the rotary shaft 22 is fixed to the center of the rotor 12, and the rotary shaft 22 is connected to the rotor portion 52 of the rotary machine 50. The rotor unit 52 is driven to rotate by the rotating machine motor 10. The rotary machine 50 includes a housing 54 that houses the rotor portion 52.
In one embodiment, the housing 54 of the rotating machine 50 is integrally connected with the housing 16 to form a hermetic sealing structure.

In one embodiment, as shown in FIG. 1, the rotating machine 50 (50 </ b> A) includes a rotating shaft 22 of the rotating machine motor 10 and a rotating shaft of the rotor portion 52 that are integrally formed. It is rotatably supported by a bearing 56 inside. Thereby, since the bearing of the rotating shaft 22 becomes unnecessary inside the motor 10 for rotary machines, the structure of the motor 10 can be simplified.
In one embodiment, as shown in FIG. 2, in the rotating machine 50 (50 </ b> B), the rotating shaft 22 a of the motor 10 and the rotating shaft 22 b of the rotor portion 52 are formed separately, and the rotating shafts 22 a and 22 b are coupled. 60 is connected. Thereby, the capacity of the motor 10 and the rotary machine 50 can be increased.

  In one embodiment, as shown in FIG. 2, one end of the rotating shaft 22 a is supported by a support base 62 fixed to the inner surface of the housing 16. A bearing 64 is provided on the support base 62, and the rotary shaft 22 a is rotatably supported by the bearing 64. A bearing support member 66 is provided between the rotary shaft 22a and the rotary machine 50 (50B) on the other end side, and the rotary shaft 22a is rotatably supported by a bearing 68 provided on the bearing support member 66.

In one embodiment, the molding material 20 is formed of an olefin-based thermosetting resin. As the olefin-based thermosetting resin, for example, a dicyclopentadiene resin can be used.
By using an olefin-based thermosetting resin having a low liquid viscosity at the time of casting as the material of the molding material 20, the molding material enters into the fine gaps between the winding and the stator, and adheres to the winding 14b after curing. Can be increased. As a result, the invasion of corrosive gas into the stator 14 can be suppressed, and the winding 14b can be protected.

In one embodiment, a mold material having a linear expansion coefficient after curing of 1.0 × 10 ⁻⁵ / K or more and 2.0 × 10 ⁻⁵ / K or less is used.
In this way, a molding material having a linear expansion coefficient close to that of the copper winding 14b can be used, and when the motor generates heat when the motor is used, between the two due to the difference in the linear expansion coefficient between the winding 14b and the molding material 20 Can be prevented.
In one embodiment, the linear expansion coefficient of the molding material 20 may be adjusted to the above range by adjusting the ratio of the filler mixed in the molding material 20. As the filler, for example, aluminum hydroxide, alumina, silica, or the like can be used.

In one embodiment, a copper winding 14b having a specific electric resistance of 2.0 μΩ · cm or less is used.
Accordingly, the electrical resistance loss of the winding 14b can be reduced, the motor efficiency can be improved, and the wire diameter of the split winding 14b that can reduce the electrical resistance loss can be reduced. Can be

In one embodiment, in the rotating machine motor 10, the winding 14 b is electrically connected to the aluminum lead wire 26 through the connection portion 24 inside the molding material 20. The lead wire 26 is connected to a terminal 28 provided on the housing 16.
Thus, the copper winding 14b that is easily corroded by the corrosive gas is embedded in the molding material 20 formed of the corrosion-resistant resin, and the aluminum lead wire that is corrosion-resistant to ammonia outside the molding material 20. 26 can be used.

In one embodiment, the stator 14 is fixed to the inner surface of the housing 16, and the molding material 20 formed of a corrosion-resistant resin is arranged so as to cover the entire stator including the winding 14b.
Thereby, the whole stator including the winding 14b can be protected from corrosive gas.

A rotary machine 50 according to an embodiment includes a rotary machine motor 10 having the above-described configuration according to some embodiments, a rotor portion 52 rotated by the rotary machine motor 10, and a housing 54 that houses the rotor portion 52. Therefore, the winding 14b of the motor 10 for a rotary machine can be protected against corrosive gas at a low cost over a long period of time.
In one embodiment, the housing 54 is integrally connected to the housing 16 of the molding material 20 and forms a hermetic sealing structure, so that the corrosive gas in the housings 16 and 54 can be prevented from leaking to the outside.

3 and 4 show an embodiment of a method for manufacturing a motor 10 for a rotary machine according to an embodiment, FIG. 3 shows the manufacturing process, and FIG. 3 shows an apparatus used for manufacturing.
In FIG. 3, first, a housing 16 and a stator 14 including a stator core 14a and a copper winding 14b are prepared, and the stator 14 is mounted inside the housing 16 (stator mounting step S10). Next, the mold 30 is arranged inside the housing 16 (mold arrangement step S12).
Next, the corrosion-resistant resin is injected into the casting space Sm inside the mold 30 and solidified so that at least the winding 14b is covered with the corrosion-resistant resin having resistance to the corrosive gas (casting step S14). FIG. 4 shows a state in which the mold 30 is arranged inside the housing 16.

  According to the above method, the copper winding 14b can be protected against the corrosive gas for a long period of time by embedding the copper winding 14b in the molding material 20 formed of the corrosion resistant resin. Moreover, the motor 10 for rotary machines can be manufactured simply and at low cost by covering the copper winding 14b with the molding material 20.

In one embodiment, the mold 30 includes a first mold 30a and a second mold 30b, and casting is performed by sandwiching the stator 14 from both sides with the first mold 30a and the second mold 30b in the mold placement step S12. A space Sm is formed.
Next, in the casting step S14, a liquid corrosion-resistant resin is injected into the casting space Sm, and is injected until the winding 14b is covered with the liquid corrosion-resistant resin, thereby curing the liquid corrosion-resistant resin.
Thus, since the casting space Sm is formed so that the stator 14 is sandwiched between the first mold 30a and the second mold 30b inside the housing 16 to which the stator 14 is attached, the casting space Sm can be easily formed. It is. That is, since the housing 16 is used as a part of the mold and the outside of the casting space Sm is formed by the housing 16, the first mold 30a and the second mold 30b can be reduced in size and can be easily attached.
Moreover, since corrosion-resistant resin should just be inject | poured until winding 14b is covered in formed casting space Sm, casting of corrosion-resistant resin can be performed easily.

In one embodiment, a corrosion-resistant resin having a viscosity before solidification of 300 to 3000 mPa · s is used as a mold material in the casting step S14. As a result, the molding material 20 enters the details of the winding 14b and the stator core 14a, and the adhesion between the molding material 20 and the copper winding 14b can be improved. Durability can be improved.
In addition, you may adjust to the viscosity of the said range by adding a filler to a molding material.

In one embodiment, the winding material 14b is made of a wire material coated with a material having good wettability with the corrosion-resistant resin used as the molding material 20, so that the molding material enters into the details of the winding wire when the mold is cast, and corrosion is caused. The durability of the winding 14b against the property gas is improved.
Further, since the adhesiveness between the solidified molding material 20 and the winding wire 14b is improved, the fixing force of the winding wire 14b and the mechanical strength of the entire stator 14 including the winding wire 14b and the molding material 20 are improved. The protective effect against property gas and the durability of the motor 10 can be improved. Furthermore, the contact thermal resistance between the winding 14b and the molding material 20 is reduced by improving the adhesiveness, and the heat dissipation of the winding 14b can be improved.

In one embodiment, as shown in FIG. 3 and FIG. 4, after the mold placement step S12, a lead wire connecting step S13 for connecting the aluminum lead wire 26 to the copper winding 14b is further provided. In the casting step S14, the corrosion resistant resin is molded so that the connecting portion 24 between the copper winding 14b and the lead wire 26 is embedded in the corrosion resistant resin.
As a result, the copper winding 14b that is easily corroded by the corrosive gas is embedded in the corrosion-resistant resin, and the aluminum lead wire 26 that is resistant to the corrosive gas can be provided outside the corrosion-resistant resin. .
In one embodiment, the corrosion resistant resin is injected into the casting space Sm until the connection portion 24 is covered with the corrosion resistant resin. In this case, the connection part 24 is arrange | positioned inside the casting space Sm.

In one embodiment, as shown in FIG. 3, in the casting step S14, the casting space Sm formed by the mold 30 is decompressed (decompression step S14b). After the decompression step S14b, a casting step S14c for injecting the corrosion resistant resin into the casting space Sm is performed.
Thereby, since the bubbles in the mold material before solidification can be removed, the mold material before solidification enters into the details of the winding, and the adhesion between the winding 14b and the cured mold material 20 can be improved. Invasion of corrosive gas into the interior can be suppressed.
In one embodiment, in the depressurization step S14b, vacuuming is performed to depressurize the casting space Sm to near vacuum.

In one embodiment, as shown in FIG. 4, in the decompression step S <b> 14 b, the upper space of the mold 30 is set as the sealed space Sc, and the upper end of the casting space Sm is communicated with the sealed space Sc to decompress the sealed space Sc.
Accordingly, the casting space Sm can be easily depressurized, and air bubbles in the mold material before solidification can be removed, so that the adhesion between the winding 14b and the mold material 20 after curing can be improved.

  In one embodiment, as shown in FIG. 4, a casting space Sm surrounding the stator 14 and the winding 14 b is formed in the housing 16 by the first die 30 a and the second die 30 b. The second die 30b is formed with a communication hole 31 that allows the casting space Sm to communicate with the outside, and a hot water channel 36 is connected to the communication hole 31. An open / close valve 38 is provided in the hot water passage 36, and the hot water passage 36 communicates with a melting tank 34 that stores a liquid corrosion-resistant resin r. The liquid corrosion-resistant resin r stored in the melting tank 34 is injected into the casting space Sm through the hot water channel 36.

A decompression jig 32 is attached to one end surface of the housing 16 (reduction jig attachment step S14a in FIG. 3), and a sealed space Sc is formed inside the decompression jig 32. The decompression jig 32 is provided with a conduit 40 communicating with the sealed space Sc, and a vacuum pump 42 is provided in the conduit 40. The casting space Sm is formed so that a part of the casting space Sm communicates with the sealed space Sc.
By operating from the vacuum pump 42, the sealed space Sc is depressurized, and bubbles contained in the liquid corrosion-resistant resin r cast into the casting space Sm are removed.

In one embodiment, the housing 16 is supported by the mold 30 with its axial direction facing the vertical direction. The lower end of the second mold 30b has a flat surface, and this flat surface serves as a support surface, and the housing 16 is stably supported with its axial direction facing the vertical direction.
In one embodiment, the communication hole 31 communicates with the lower end of the casting space Sm, and the liquid corrosion-resistant resin is injected into the lower end of the casting space Sm through the communication hole 31. A decompression jig 32 is attached to the upper end surface of the housing 16, a sealed space Sc is formed below the decompression jig 32, and an upper end of the casting space Sm is formed in the sealed space Sc.
In this way, by removing the upper end of the casting space Sm from the sealed space Sc, the removal of bubbles is promoted in the decompression step S14b.

In one embodiment, as shown in FIG. 3, after the casting of the corrosion resistant resin is finished and the on-off valve 38 is closed, the vacuum pump 42 is operated to depressurize the sealed space Sc again (decompression step S14d). The operation of the vacuum pump 42 is stopped when the sealed space Sc is sufficiently close to vacuum.
Thereafter, the decompression jig 32 is removed (removal jig removal step S14e), and the liquid corrosion-resistant resin r is cured by heating (heat curing step S15). After the liquid corrosion resistant resin is cured, the first mold 30a and the second mold 30b of the mold 30 are removed.

In one embodiment, the stator 14 is attached to the housing 16 by shrink fitting in the stator attachment step S10.
Thereby, the stator 14 can be fixed to the housing 16 simply and at low cost.

  According to at least one embodiment, it is possible to realize a rotating machine motor that can be easily and inexpensively protected against corrosive substances such as ammonia, and a rotating machine including the rotating machine motor.

DESCRIPTION OF SYMBOLS 10 Motor for rotary machines 12 Rotor 14 Stator 14a Stator core 14b Winding 16, 54 Housing 20 Mold material 22, 22a, 22b Rotating shaft 24 Connection part 26 Lead wire 28 Terminal 30 Mold 30a 1st type | mold 30b 2nd type | mold 31 Communication hole 32 Depressurizing jig 34 Melting tank 36 Hot water path 38 Valve 40 Pipe line 42 Vacuum pump 50 (50A, 50B) Rotary machine 52 Rotor part 56, 64, 68 Bearing 60 Coupling 62 Support base 66 Bearing support member Sc Sealing Space Sm Casting space r Corrosion resistant resin

Claims (14)

A motor for driving a rotating machine using corrosive gas as a working fluid,
A rotor,
A housing for housing the rotor part of the rotating machine and the rotor;
A molding material provided on the outer peripheral side of the rotor inside the housing and formed of a corrosion-resistant resin having resistance to the corrosive gas;
A stator core fixed to the inside of the housing, and a stator including a copper winding attached to the stator core;
With
A motor for a rotary machine, wherein at least the winding of the stator is covered with the mold material.   The motor for a rotary machine according to claim 1, wherein the mold material is formed of an olefin-based thermosetting resin. 3. The motor for a rotary machine according to claim 1, wherein a linear expansion coefficient of the mold material is 1.0 × 10 ⁻⁵ / K or more and 2.0 × 10 ⁻⁵ / K or less.   The motor for a rotary machine according to any one of claims 1 to 3, wherein a specific electric resistance of the copper winding is 2.0 µΩ · cm or less. Terminals provided in the housing;
An aluminum lead wire connected to the winding inside the mold material and electrically connecting the winding and the terminal;
The motor for a rotary machine according to any one of claims 1 to 4, further comprising: The stator is fixed to the inner surface of the housing;
The motor for a rotary machine according to any one of claims 1 to 5, wherein the corrosion-resistant resin is disposed so as to cover the entire stator including the winding.   The motor for a rotary machine according to any one of claims 1 to 6, wherein the corrosion-resistant resin does not transmit the corrosive gas. A motor according to any one of claims 1 to 7,
A rotor configured to rotate by being driven by the motor;
A housing for housing the rotor and stator of the motor, and the rotor portion;
A rotating machine comprising: A method of manufacturing a motor for driving a rotary machine using corrosive gas as a working fluid,
A stator mounting step for mounting a stator including a copper winding inside the housing;
A mold placement step of placing a mold inside the housing;
A casting step of injecting and solidifying the corrosion-resistant resin into a casting space inside the mold so that at least the winding is covered with the corrosion-resistant resin having resistance to the corrosive gas;
A method for manufacturing a motor for a rotary machine, comprising: In the casting step,
The method for manufacturing a motor for a rotary machine according to claim 9, wherein the viscosity of the corrosion-resistant resin before solidification is adjusted to 300 mPa · s or more and 3000 mPa · s or less. A lead wire connecting step of connecting an aluminum lead wire to the copper winding;
In the casting step,
11. The rotary machine according to claim 9, wherein the corrosion-resistant resin is molded so that a connection portion between the copper winding and the aluminum lead wire is embedded in the corrosion-resistant resin. A method for manufacturing a motor. In the casting step,
The method for manufacturing a motor for a rotary machine according to any one of claims 9 to 11, further comprising a depressurizing step of depressurizing the casting space formed inside the mold.   13. The method for manufacturing a motor for a rotary machine according to claim 12, wherein an upper space of the mold is a sealed space, an upper end of the casting space is communicated with the sealed space, and the sealed space is decompressed. In the stator mounting step,
The method for manufacturing a motor for a rotary machine according to any one of claims 9 to 13, wherein the stator core of the stator is attached to the housing by shrink fitting.

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