WO2018167869A1

WO2018167869A1 - Rotating body, electric compressor, and turbine power generator

Info

Publication number: WO2018167869A1
Application number: PCT/JP2017/010378
Authority: WO
Inventors: 小澤　義則
Original assignee: マーレエレクトリックドライブズジャパン株式会社
Priority date: 2017-03-15
Filing date: 2017-03-15
Publication date: 2018-09-20
Also published as: JP6759447B2; JPWO2018167869A1

Abstract

The present invention protects a permanent magnet constituting a rotating body and a permanent magnet constituting the rotors of an electric compressor and a turbine power generator from centrifugal force and prevents the magnets from breaking due to heat cycling. The rotating body is provided with a shaft, a plurality of magnets cylindrically arranged and fixed on the outer circumference of the shaft, and a cylindrical protection member formed by winding a filament around the outer perimeters of the magnets, wherein a non-adhesive layer is interposed between the outer perimeters of the magnets and the inner circumference of the protection member.

Description

Rotating body, electric compressor and turbine generator

The present invention relates to a rotating body provided with a permanent magnet in a rotating body and rotating at a high speed, and further to an electric compressor and a turbine generator using the rotating body.

In recent years, efforts to reduce CO2 emissions have been introduced in various countries as a measure against global warming, and the target value of emissions has become stricter year by year. This is also true in the automobile field. Each manufacturer is working on the development of technology to improve fuel efficiency, and automobiles that do not use internal combustion engines such as electric vehicles (EV) and fuel cell vehicles (FCV, fuel cell vehicles) have also been developed. ing. On the other hand, in the global market, there is still a high demand for automobiles that use only an internal combustion engine as a driving source in terms of price, and it still has years to replace EVs and FCVs.

Therefore, development of fuel efficiency improvement technology for automobiles with internal combustion engines is urgently needed, and one of the trends is a technology called downsizing turbo. In short, this means that the engine displacement is reduced to improve fuel efficiency, and the lost torque is compensated by turbo.

However, turbo-equipped engine vehicles also have weaknesses, one of which is the problem of turbo lag. As a characteristic of a rotating turbine driven by exhaust, there is a time lag until the rotation is increased by exhaust.

That is, when stepping on the accelerator and accelerating, the turbine rotates due to exhaust, and the intake pressure increases due to the rotation of the compressor directly connected to the turbine. Therefore, there is a delay of one tempo until the intake pressure increases after the accelerator is pressed.

In order to improve this, there is an electric compressor technology that installs an intake compressor, steps on the accelerator, and at the same time increases the intake pressure by driving with a motor without a time lag.

The motor used for these needs to have an acceleration capacity that can reach the number of revolutions (tens of thousands of rpm) required by the compressor in a few seconds (1 second or less). Therefore, it is necessary to make the inertia of the rotor of the motor as small as possible, and a small inner rotor type motor is employed.

JP-A-9-203382 JP-A-8-159062 Japanese Patent Laying-Open No. 2015-091202 JP 2010-200490 A

13 and 14 show the structure of a rotor (rotor) of an inner rotor type motor using a general permanent magnet. The rotor is configured by affixing a plurality of permanent magnets 12 having an arc-shaped cross section to the outer peripheral surface of a shaft (or rotor core) 11 in a cylindrical shape, and the magnets 12 do not scatter due to centrifugal force during rotation. As described above, the protective sleeve 15 is provided on the outer peripheral surface of the magnet 12 for assembly (Patent Documents 1 and 2).

Since the centrifugal force increases when the rotor rotates at a high speed, the protective sleeve 15 needs a particularly high strength in order to withstand radial stress due to the centrifugal force applied to the sleeve itself and the magnet 12.

On the other hand, in order to rotate at a high speed, it is necessary to reduce the amount of unbalance of the rotor, and a highly accurate balance correction is required. In the case of the above structure, the magnet 12 divided into the arc shape is attached to the shaft 11 in a cylindrical shape with an adhesive or the like, and the protective sleeve 15 is provided thereon.

However, if the gap between the protective sleeve 15 and the magnet 12 is large, the adhesive interposed between the two may be peeled off by centrifugal force and the magnet 12 may move and lose its balance. I don't want to make a gap as much as possible.

Also, although the magnet 12 is composed of a plurality of pieces and is within the dimensional tolerance, the size of each magnet is slightly different, so that the magnet 12 does not have a complete cylindrical shape. Moreover, many permanent magnets are brittle materials and are easily broken when excessive stress is applied.

For this reason, it is difficult to fit and hold the outer periphery of an existing cylindrical member by drawing, press-fitting or shrink fitting (Patent Document 1, Patent Document 2), and the magnet 12 and protective sleeve It is difficult to configure between 15 without any gap.

As one of the methods adopted there, there is a method in which the protective sleeve 15 is made of carbon fiber (carbon fiber) by the filament winding method as shown in Patent Document 3 or Patent Document 4.

This method is a method of forming a carbon fiber reinforced plastic by winding a carbon fiber having a resin attached on the outer peripheral surface of a magnet 12 in a spiral shape in a substantially circumferential direction and hardening the attached resin by thermosetting. is there.

According to this method, since the protective sleeve 15 having a high mechanical strength is formed by adhering to the outer periphery of the magnet 12 with a resin, rigidity can be maintained against heat generated by high-speed rotation, and centrifugal force works. The magnet 12 is prevented from peeling off from the shaft.

However, the above method causes another problem. That is, carbon fiber reinforced plastic (CFRP) is to firmly bond the protective sleeve 15 and the outer peripheral surface of the magnet 12 during the thermosetting process.

When bonded in this way, the linear expansion coefficient differs between the magnet 12 and the protective sleeve 15 made of CFRP. Therefore, in the environment of the cooling and heating cycle, the circumferential expansion and contraction amounts of the two differ, and the bonding boundary surface is different. Stress will be added.

FIG. 14 shows the state of the stress. When the cooling cycle is repeated, the magnet 12 is dragged by the thermal deformation of the bonded protective sleeve 15 having a high mechanical strength, and a repeated force is applied in the direction of the arrow 16. receive.

For example, in the case of thermal expansion, when the protective sleeve 15 expands in the direction of the arrow 16, the magnet 12 adhered to the protective sleeve 15 is pulled on both sides of the arrow 17, and a slight gap or magnet is formed on the boundary surface between the magnets 12. There is a risk of cracking in itself.

When gaps or cracks occur in the magnet, it is further expanded by centrifugal force, and even if the centrifugal force is removed, it does not return to its original state. Therefore, the magnet 12 remains moving, and the weight balance of the rotor may be lost.

Therefore, when the weight balance of the rotor adjusted at the time of assembling the motor is lost, high-speed rotation cannot be performed.

This problem is not limited to the rotor (rotary body) of the electric turbo motor, but also applies to the rotor of a turbine generator in which a generator is arranged coaxially with a turbine driven by exhaust gas or steam of an internal combustion engine.

In view of the above-described conventional problems, the present invention protects a permanent magnet constituting a rotating body from centrifugal force and prevents breakage of the magnet due to a heat cycle, so that the rotating body can be rotated to a high speed rotation range. An object is to provide an electric compressor and a turbine generator.

In order to solve the above problems, the present invention provides a shaft, a plurality of magnets arranged and fixed in a cylindrical shape on the outer periphery of the shaft, and a cylinder formed by winding a filament around the outer periphery of the plurality of magnets. And a non-adhesive layer is interposed between the outer periphery of the magnet and the inner periphery of the protective member.

According to this configuration, even if centrifugal force is applied, the magnet is prevented from peeling off from the shaft, and the magnet and the protective member are not adhered to each other, so that stress on the magnet due to heat cycle is prevented.

In the above, the non-adhesive layer has an adhesive surface that adheres to the outer periphery of the magnet on one side and a non-adhesive surface that slidably contacts the inner periphery of the protective member on the other side. Features.

According to this configuration, since the non-adhesive layer is formed, the adhesion surface of the non-adhesion layer is adhered to the outer periphery of the magnet, so that the operation is simplified.

Also, in the above, the non-adhesive layer is a fluororesin film individually bonded to each outer periphery of the plurality of magnets.

According to this configuration, the adhesive surface of the non-adhesive layer is adhered to the outer periphery of the individual magnet to form the non-adhesive layer, and thus the small piece fluororesin film is individually adhered to each magnet. It will be easy.

In the above, the non-adhesive layer is a fluororesin film adhered to the entire outer periphery of the plurality of magnets.

According to this configuration, since the fluororesin film is bonded at once to the entire outer periphery of the plurality of magnets, the bonding operation of the non-adhesive layer can be performed in a short time.

In the above, the non-adhesive layer is formed of a coating material formed on the outer periphery of the magnet.

In the above, the coating material is a fluororesin or titanium nitride.

According to these structures, the outer periphery of the magnet may be coated with fluororesin or titanium nitride, so that the non-adhesive layer can be formed easily and uniformly.

In the above, the coating material is formed by a release agent applied to the outer periphery of the magnet.

In the above, the release agent is a fluorine-type or silicon-type release agent.

According to these configurations, since the fluorine-based or silicon-based release agent is applied to the outer periphery of the magnet, the non-adhesive layer can be easily and uniformly formed.

In addition, the present invention includes a stator, a rotor, and an impeller that compresses gas, and the impeller is an electric compressor that is disposed coaxially with the rotor. It is characterized by using.

According to this configuration, it is possible to obtain an electric compressor that prevents breakage of the magnet due to heat cycle.

Moreover, this invention is provided with the turbine rotated with a stator, a rotor, and carrier gas, The said turbine is a turbine generator arrange | positioned coaxially with the said rotor. It is characterized by using a rotating body.

According to this configuration, it is possible to obtain a turbine generator that prevents breakage of the magnet due to heat cycle.

ADVANTAGE OF THE INVENTION According to this invention, while protecting the permanent magnet which comprises a rotary body, and the permanent magnet which comprises the rotor of an electric compressor and a turbine generator from a centrifugal force, it can prevent the fracture | rupture of the magnet by a heat cycle. it can.

It is sectional drawing orthogonal to the shaft of the rotary body of Example 1 of this invention. It is sectional drawing along the shaft of the rotary body of Example 1 of this invention. It is a cross-sectional enlarged view of the non-adhesion layer of Example 1 of the present invention. It is a perspective view of the rotary body of Example 1 of this invention. It is explanatory drawing of the operation | work which forms a protection member in the outer periphery of the magnet of Example 1 of this invention. It is explanatory drawing of the operation | work which forms the protection member of Example 1 of this invention. It is sectional drawing of the magnet in which the protection member of Example 1 of this invention was formed. It is sectional drawing which shows a part of rotary body of Example 1 of this invention. It is sectional drawing which shows a part of rotary body of Example 2 of this invention. It is sectional drawing which shows a part of rotary body of Example 3 and 4 of this invention. It is sectional drawing of the electric compressor of Example 5 of this invention. It is sectional drawing of the turbine generator of Example 6 of this invention. It is sectional drawing of the rotor of the inner rotor type motor of a prior art example. It is an enlarged view which expands and shows a part of FIG.

Hereinafter, each embodiment of the present invention will be described with reference to FIGS. In each figure, the parts denoted by the same reference numerals indicate the same or corresponding parts.

FIG. 1 is a cross-sectional view perpendicular to the shaft of the rotating body according to the first embodiment of the present invention, and FIG. 2 is a cross-sectional view along the shaft.

Numeral 10 is a rotating body, which constitutes a turbo motor for an electric compressor by a stator (not shown) arranged on the outer periphery thereof, and rotates at a high speed of tens of thousands rpm or more by supplying power to the coil of the stator.

1 is a shaft of a rotating body, both ends of which are supported by bearings (not shown). Reference numeral 2 denotes a permanent magnet fixed to the outer peripheral surface of the shaft 1 with an adhesive, and is configured by combining a plurality of pieces having an arc-shaped cross section into a cylindrical shape.

The plurality of pieces are even numbers, and the polarities of the outer peripheral surfaces combined in a cylindrical shape are alternately changed from N → S → N → S. In the first embodiment, four pieces of magnets 2a to 2d are used. Composed.

Numeral 5 is a protective member that prevents the magnets 2a to 2d from being lifted and scattered by centrifugal force during rotation. The protection member 5 is formed in a cylindrical shape on the outer peripheral surface of the magnets 2a to 2d formed in a cylindrical shape, and is made of a nonmagnetic material.

The protective member 5 is configured by spirally winding glass fibers or carbon fibers having an epoxy resin adhered to the outer peripheral surface of a cylinder formed of magnets 2a to 2d by a filament winding method.

Reference numeral 4 denotes a non-adhesive layer interposed between the outer peripheral surface of the cylinder formed by the magnets 2a to 2d and the inner peripheral surface of the protective member 5, and is attached to the outer peripheral surface of the cylinder of the magnets 2a to 2d. .

The rotating body 10 is composed of the shaft 1, the permanent magnet 2, the non-adhesive layer 4 and the protective member 5.

The non-adhesive layer 4 has a non-adhesive contact with an adhesive surface 3 that adheres to the outer peripheral surface of the magnet on one side and a slidable contact with the inner periphery of the protective member 5 on the other side, as shown in cross section in FIG. Each has a surface 7. The adhesive surface 3 is covered with a protective release liner 6, and the release liner 6 is peeled off and bonded to the outer peripheral surface of the magnet 2.

For example, the non-adhesive surface 7 is a PTFE film (fluororesin film), the adhesive surface 3 is a silicone-based adhesive, and the release liner 6 is a PET release liner.

FIG. 4 is a perspective view of the rotating body according to the first embodiment of the present invention. The non-adhesive layer 4 is composed of divided four pieces 4a to 4d, and individually bonded to the outer peripheral surfaces of the magnets 2a to 2d. In this configuration, the small piece of the non-adhesive layer 4 is individually bonded to each magnet, so that the bonding operation is simplified.

FIG. 5 is an explanatory diagram of the operation of forming the protective member 5 on the outer periphery of the magnet of the first embodiment, and shows a winding device that performs filament winding.

51 is a feeding reel for the four

carbon fibers

52, and 53 is a bar that aligns the spacing and posture of the four carbon fibers 51 that have been fed. 54 is a resin tank for adhering epoxy resin to each

carbon fiber

52, 55 is a head that supports the resin tank 54 and reciprocates in the width direction, 56 is a support base on which the head 55 moves, and 58 is a reciprocating head 55. A head moving mechanism to be controlled.

A rotating body 10 shown in FIG. 4 is disposed in front of the head 55. The rotating body 10 has both ends of the shaft 1 supported by a supporting body (not shown) of the winding device and is rotated by a rotating mechanism 59.

The epoxy resin is adhered to the surface of the four carbon fibers 52 by passing through the resin tank 54. Next, the carbon fiber 52 is spirally wound around the outer periphery of the non-adhesive layer 4 of the rotating body by the rotation of the rotating body 10 by the rotating mechanism 59 and the reciprocating motion of the head 54.

As shown in FIG. 6, the rotating body 10 is removed from the support of the winding device after the carbon fiber 52 is densely wound around the outer peripheral surface of the non-adhesive layer 4 and a predetermined number of layers are wound. The
The removed rotating body 10 is entirely heated, and the epoxy resin adhering to the carbon fiber 52 is heated and cured.

FIG. 7 shows the state after heat curing in cross section. The carbon fibers 52 wound around the outer periphery of the non-adhesive layer 4 are bonded together by curing of the epoxy resin to form a cylindrical protective member 5 having a high mechanical strength (only one layer is wound in the figure). Yes.)

In the first embodiment, the non-adhesive layer 4 is divided into four pieces 4a to 4d and individually bonded to the outer peripheral surfaces of the magnets 2a to 2d. It becomes a structure.

8, the non-adhesive surface 7 and the adhesive surface 3 constituting the non-adhesive layer 4 are both four pieces, and there is a boundary between the pieces.

In FIG. 8, the magnet 2 and the protective member 5 have different amounts of expansion and contraction in the circumferential direction depending on the difference in linear expansion coefficient. Therefore, in the case of thermal expansion, the protective member 5 having high mechanical strength expands and moves in the circumferential direction indicated by the arrow 9.

In Example 1, the non-adhesive layer 4 is interposed between the inner peripheral surface of the protective member 5 and the outer peripheral surface of the magnet 2, and the non-adhesive surface 7 of the non-adhesive layer 4 is in contact with the protective member 5. Even if it moves by expansion, it only slides on the surface of the non-adhesive surface 7, and no force is applied to the non-adhesive layer 4 and the magnet 2.

Therefore, the permanent magnet is protected from the centrifugal force applied to the rotating body 10, and no stress is applied to the magnet 2 even if the protective member 5 expands and contracts due to the heat cycle.

FIG. 9 is a cross-sectional view showing a part of the rotating body according to the second embodiment of the present invention. In Example 2, the non-adhesive layer 4 (adhesive surface 3, non-adhesive surface 7) is bonded to the outer periphery of the plurality of magnets 2 at once without dividing the non-adhesive layer 4 (adhesive surface 3, non-adhesive surface 7) into four pieces. .

According to this configuration, since the fluororesin film can be bonded to the entire outer periphery of the plurality of magnets at once, the bonding operation of the non-adhesive layer can be performed in a short time.

In the first embodiment, a gap is formed at the boundary between the plurality of non-adhesive layers 4a to 4d. However, in this second embodiment, there is no gap in the non-adhesive layer 4, and the non-adhesive layer 4 is formed at the boundary of each magnet. The outer periphery becomes smooth, and the sliding with the protective member 5 is even better.

In the cross-sectional structure of FIG. 9, the magnet 2 and the protection member 5 have different linear expansion coefficients, but even if the protection member 5 having a high mechanical strength is thermally expanded in the circumferential direction of the arrow 9, the non-adhesive layer 4 (non- It only slides on the adhesive surface 7).

Therefore, the permanent magnet is protected from the centrifugal force applied to the rotating body 10, and no stress is applied to the magnet 2 even if the protective member 5 expands or contracts due to the heat cycle.

FIG. 10 is a cross-sectional view showing a part of the rotating body of Examples 3 and 4 of the present invention. In Examples 1 and 2, the PTFE film (fluororesin film) is formed as the non-adhesive layer 4, but in this Example 3, the non-adhesive layer 4 is composed of a non-adhesive coating material 8. Yes.

The coating material 8 is made of fluororesin or titanium nitride. The fluororesin is applied and fixed to the outer peripheral surface of the magnet 2, and the titanium nitride is fixedly formed on the outer periphery of the magnet 2 by vapor deposition.

According to this configuration, since it is only necessary to coat the outer peripheral surface of the magnet with fluororesin or titanium nitride, the non-adhesive layer can be formed easily and uniformly.

The formation of the coating material 8 can be performed before the magnet 2 is bonded to the shaft 1 and after the bonding.

In the case of implementation before the magnet 2 is bonded to the shaft 1, the coating material 8 is not mistakenly attached to the inner peripheral surface of the magnet 2 (if it adheres to the inner peripheral surface of the magnet 2, the outer peripheral surface of the shaft 1 and the magnet 2), it is necessary to mask the inner peripheral surface of the magnet 2 with a tape or the like in advance.

Thus, with the inner peripheral surface of the magnet 2 masked, the coating material 8 is formed on the outer peripheral surface of the magnet 2 by coating or vapor deposition, and the masking tape is peeled off after the operation.

On the other hand, when the coating material 8 is formed after the magnet 2 is bonded to the shaft 1, the forming operation is performed in a state where masking is applied to portions other than the outer peripheral surface of the magnet that do not require coating.

After the coating material is formed, the protective member 5 is formed by winding the carbon fiber 52 on the outer peripheral surface of the coating material by the winding device shown in FIG.

In the cross-sectional structure of FIG. 10, the magnet 2 and the protection member 5 have different linear expansion coefficients, but even if the protection member 5 having a high mechanical strength is thermally expanded in the circumferential direction of the arrow 9, It only slides.

In Example 4, a release agent is used as the coating material 8, and the release agent is adhered by applying a fluorine-based or silicon-based release agent to the outer peripheral surface of the magnet 2.

When applying the release agent before adhering the magnet 2 to the shaft 1, in order to prevent the release agent from accidentally adhering to the inner peripheral surface of the magnet 2 (adhesion surface with the outer peripheral surface of the shaft 1), It is necessary to mask the inner peripheral surface of the magnet 2 with a tape or the like.

Further, since the release agent is wiped off by inadvertent contact by other work after application, it is preferably applied immediately before the carbon fiber 52 is wound by the winding device shown in FIG.

According to this configuration, since it is only necessary to apply a fluorine-based or silicon-based release agent to the outer peripheral surface of the magnet, the non-adhesive layer can be easily and uniformly formed.

After the release agent is attached, the carbon fiber 52 is wound around the outer peripheral surface of the release agent by the winding device shown in FIG. 5 to form the protective member 5.

As shown in FIG. 10, the rotating body 10 configured as described above has a release agent (coating material 8) even when the protective member 5 having high mechanical strength is thermally expanded in the circumferential direction indicated by the arrow 9. It only slides on the surface.

FIG. 11 is a cross-sectional view of an electric compressor having an inner rotor type electric motor in Example 5 of the present invention.

31 is an electric compressor, which includes a compressor section 32 and an inner rotor type electric motor 33. The compressor unit 32 includes an impeller 34, and the electric motor 33 includes a rotor 35 and a stator 36.

The impeller 34 and the rotor 35 are integrally formed coaxially with a rotating shaft 37 (shaft), and are rotatably supported by a housing 39 via a bearing 38. The stator 36 is fixed to the housing 39.

In the above configuration, when control electric power is supplied to the motor from a controller (inverter) (not shown), the rotor 35 rotates at a high speed in a predetermined direction, and the impeller 34 also rotates at a high speed.

As a result, the outside air is sucked in the direction indicated by the arrow by the impeller 34, compressed and discharged.

Generally, an electric compressor used for intake of an internal combustion engine has several tens of thousands of revolutions, and is required to repeat acceleration and deceleration.

In the electric compressor of the fifth embodiment, the rotor 35 is any one of the rotors of the first to fourth embodiments, so that the rotor 35 can be used even when it is repeatedly used at a high speed rotation in a cold cycle environment. It is possible to prevent cracking of the magnet.

Therefore, the permanent magnet constituting the rotor of the electric compressor can be protected from centrifugal force due to high-speed rotation and can be prevented from being broken by heat cycle, and the electric compressor can be maintained at high speed while maintaining the balance of the rotating body. be able to.

FIG. 12 is a cross-sectional view of a turbine generator having an inner rotor type generator in Example 6 of the present invention.

41 is a turbine generator, and includes a turbine section 42 and an inner rotor type generator 43. The turbine section 42 includes a turbine 44, and the generator 43 includes a rotor 45 and a stator 46.

The turbine 44 and the rotor 45 are integrally formed coaxially with a rotating shaft 47 (shaft), and are rotatably supported by a housing 49 via a bearing 48. The stator 46 is fixed to the housing 49.

In the above configuration, when compressed air is sent into the turbine 44 in the direction indicated by the arrow, the turbine 44 rotates at a high speed in a predetermined direction with the energy, and at the same time, the rotor 45 integrally formed coaxially also rotates at a high speed.

As a result, it operates so that power is appropriately supplied to a power receiving unit (not shown) electrically connected to the stator coil.

Generally, a turbine generator driven by exhaust gas from an internal combustion engine reaches tens of thousands of revolutions, and acceleration / deceleration is repeatedly performed.

In the turbine generator 41 of the sixth embodiment, by using the rotor 45 as the rotor of any of the first to fourth embodiments, the rotor 45 can rotate even when repeatedly used at a high speed rotation in an environment of a thermal cycle. The crack of the magnet of the child 45 can be prevented.

Therefore, the permanent magnets constituting the rotor of the turbine generator can be protected from centrifugal force due to high speed rotation, and can be prevented from being broken by heat cycle, and the turbine generator can be rotated at high speed while maintaining the balance of the rotating body. Can be maintained.

DESCRIPTION OF SYMBOLS 1 ...

Shaft

2, 2a, 2b, 2c, 2d ... Permanent magnet, magnet 3 ... Adhesion surface 4 ...

Non-adhesion layer

4a, 4b, 4c, 4d ... Piece 5 ... Protection member 6 ... Release liner 7 ... Non-adhesion surface 9 ... Direction of expansion of protective member, arrow 10 ... rotating body 11 ... shaft 12 ... magnet 15 ... protective sleeve 16 ... direction of expansion of protective sleeve, arrow 17 ... direction of tension of magnet, arrow 31 ... electric compressor 32 ... compressor section 33 ... electric motor 34 ... impeller 35 ... rotor 36 ... stator 37 ... rotating shaft 38 ... bearing 39 ... housing 41 ... turbine generator 42 ... turbine section 43 ... generator 44 ... turbine 45 ... rotor 46 ... stator 47 ... rotating shaft 48 ... Bearing 49 ... Housing 51 ... Feeding reel 52 ... Carbon fiber 53 ... Bar 54 ... Resin tank 55 ... Head 56 ... Support base 58 ... Head moving mechanism 59 ... Rotation Structure

Claims

A shaft,
A plurality of magnets arranged and fixed in a cylindrical shape on the outer periphery of the shaft;
A cylindrical protective member configured by winding a filament around the outer periphery of the plurality of magnets;
A rotating body comprising a non-adhesive layer interposed between an outer periphery of the magnet and an inner periphery of the protective member.
The non-adhesive layer has an adhesive surface that adheres to the outer periphery of the magnet on one side and a non-adhesive surface that slidably contacts the inner periphery of the protective member on the other side. The rotating body according to 1.
3. The rotating body according to claim 2, wherein the non-adhesive layer is a fluororesin film individually bonded to each outer periphery of the plurality of magnets.
The rotating body according to claim 2, wherein the non-adhesive layer is a fluororesin film adhered to the entire outer periphery of the plurality of magnets.
2. The rotating body according to claim 1, wherein the non-adhesive layer is made of a coating material formed on an outer periphery of the magnet.
The rotating body according to claim 5, wherein the coating material is fluororesin or titanium nitride.
6. The rotating body according to claim 5, wherein the coating material is formed by a release agent applied to an outer periphery of the magnet.
The rotating body according to claim 7, wherein the release agent is a fluorine-based or silicon-based release agent.
A stator, a rotor, and an impeller that compresses gas, wherein the impeller is disposed coaxially with the rotor,
An electric compressor using the rotating body according to any one of claims 1 to 8 as the rotor.
A turbine generator including a stator, a rotor, and a turbine that is rotated by a carrier gas, wherein the turbine is disposed coaxially with the rotor;
A turbine generator using the rotor according to any one of claims 1 to 8 as the rotor.