JP2000299964A - Rotating machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably maintain a rotating section support body, which supports a rotating section by preventing movement of improper materials, heat, etc., between spaces on a rotating section side and a rotationally driving section side, and at the same time, making the rotating section support body removable so that the support body may be washed, cleaned, exchanged, and so on at any time. SOLUTION: A rotary machine is built, by coaxially providing a motor 20 on the bottom side and an impeller 30 on the top side with a partition 10a made of a non-ferromagnetic material in between. Then a support frame 32, having a sleeve bearing section 34 which rotatably supports a rotating shaft 30a of the impeller 30 is removably put on the outer periphery of a fan casing 10 and is fixed to the casing 10. Permanent magnet bodies 24 for driving rotating section are provided rotationally symmetrically on the upper surface side of a rotor frame 22a around the axial line, so that the positive and negative magnetic poles are arranged alternately at fixed central-angle intervals in the peripheral direction. Similarly, permanent magnet bodies 36 coupled with the rotating section are provided on the lower surface side of a hub 30b. Since the magnet bodies 36 and 24 are made to face each other with their opposite magnetic poles in the axial direction with the partition 10a pinched inbetween, the magnet bodies 36 and 24 magnetically attract each other, and the rotating shafts 30a and 20a of the impeller 30 and motor 20 are coupled magnetically with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating machine in which a rotating unit is magnetically driven by a rotating unit with a separating unit interposed therebetween, and more particularly to a rotating machine between a rotating unit side space and a rotating unit side space. Inconvenient materials, heat, vibration,
The present invention relates to a rotating machine that causes a problem when noise or the like moves or transmits from the other side to one side.

[0002]

2. Description of the Related Art A rotating body such as an impeller for stirring or sending out a gas or a liquid is driven by a driving unit across a partition wall, so that the space on the rotating body side and the driving unit side are rotated. As a rotating machine that prevents substances or heat, etc. that are inconvenient for one side from moving from the other side to one side between the spaces, the driving unit and the rotating body are opposed to each other with a partition wall interposed therebetween. There is a type in which a magnetic pole is provided, and a driving unit is rotated to magnetically rotate a rotating body across a partition. For example, an electric pot pump device, a stirrer, and the like.

[0003] Thus, when foods, dishes, tableware, cooking utensils, medicines, medical supplies, sanitary goods, and the like are handled as gas or liquid to be stirred or delivered in the space on the rotating body side, the space from the driving unit side to the space on the rotating body side is handled. To prevent impurities or toxic substances including lubricants and magnetic powders from entering the bearings, and leakage of such gases and liquids from the rotating body side to the drive section side to prevent moisture and metal corrosive substances. It is possible to prevent a substance causing rust or corrosion of metal from entering the drive unit. In such a case, the rotating body is rotatably supported in the space on the rotating body side by various bearing devices separately from the drive unit.

On the other hand, when handling foods and drinks or pharmaceuticals as a gas or liquid to be stirred or delivered, it is necessary to keep the rotating body and the bearing device clean at all times. For this purpose, the rotating body and the bearing device need to be cleaned or cleaned. Or, it is strongly desired that the replacement of the rotating part can be easily performed at any time.

When this kind of rotating machine is used by being incorporated in various devices, it is strongly desired to make the rotating machine as thin as possible in order to reduce the size of the entire device as much as possible.

SUMMARY OF THE INVENTION The present invention has been made in view of the above various needs, and an object of the present invention is to provide one of a space between a rotating unit side space and a rotation driving unit side. While it is possible to prevent substances and heat, etc., which are inconvenient for the side from moving from the other side to the one side, the rotating part support supporting the rotating part can be removed to perform washing or cleaning, or replacement at any time, Another object of the present invention is to provide a rotating machine that can stably hold a rotating portion support that supports the rotating portion.

Another object is to make the rotating machine thinner.

[0008]

According to the present invention, there is provided a rotating machine having a magnetic pole structure capable of forming a magnetic field rotating around an axis, and a magnetic pole of the rotary driving section. It has a magnetic pole opposed to the structure, magnetically acts on the magnetic pole by the magnetic field formed in the rotation drive section rotating around the axis, and around the axis without contact with the rotation drive section. A rotating unit that is magnetically driven to rotate, a rotating unit support that rotatably supports the rotating unit, a holding unit that detachably holds the rotating unit support that supports the rotating unit, and the rotating unit And an isolating section for isolating the rotating section from the rotating section, so that a magnetic attraction force between the magnetic pole of the rotating section and the rotating section prevents the rotating section support body from separating from the holding section in the axial direction. It acts (claim 1).

[0009] Since the rotation of the rotation unit by the rotation drive unit is performed in a state where the rotation unit and the rotation drive unit are separated by the separation unit, any one of the rotation unit side space and the rotation drive unit side space is provided. Substances, heat, and the like (for example, various dusts and droplets) that are inconvenient for one side are prevented from moving from the other side to one side and from the other side. Specifically, for example, when rotating food and drink, tableware, cooking utensils, medicines, medical supplies, sanitary goods, and the like on the rotating unit side, the rotating unit is mainly used to maintain a space state such as cleanliness of the rotating unit side. When preventing the movement of undesired substances and heat (rust preventive agent, insulating paint, heavy metal, various dusts, etc.) from the space on the drive unit side to the space on the rotary unit side, corrosion and insulation on the rotary drive unit side are mainly used. In order to prevent the deterioration of the performance, other functions, and damage, etc., inconvenient materials or heat from the space on the rotating part side to the space on the rotating drive part side (moisture, metal corrosive substance, insulating paint soluble substance, cryogenic substance, In the case where an extremely high temperature substance or the like is prevented from moving, there may be a case where both of these are the main purposes. In addition, transmission of mechanical vibration and noise (for example, noise and vibration due to rotation of the rotating unit and electromagnetic vibration of the rotating drive unit) between the rotating unit side and the rotating driving unit side can be prevented as much as possible. It is.

The rotating portion support that rotatably supports the rotating portion is detachable from the holding portion. Therefore, the rotating portion support that supports the rotating portion is removed from the holding portion to clean the rotating portion or the rotating portion support. Cleaning or replacement of the rotating part or the rotating part support can be performed at any time. Therefore, it is possible to easily and appropriately maintain the state of the space such as the cleanliness of the space on the rotating section side and maintain the rotation property of the rotating section.

Further, the magnetic attraction between the magnetic pole of the rotating part and the rotary driving part may cause the rotating part support member to move away from the holding part in the axial direction. )
Since it acts to prevent the rotating portion support from being detached, it is useful for stabilizing the holding of the rotating portion support by the holding portion while maintaining the detachability of the rotating portion support. This magnetic attraction force
It acts between the magnetic pole of the rotating part and the permanent magnet body, the iron core of the iron core coil, the yoke of the air core coil, etc. in the magnetic pole structure.

[0012] As the magnetic pole structure of the rotation drive unit,
For example, a rotating device having magnetic poles made of a permanent magnet body, an air core coil, an iron core coil, etc., is rotated around the axis by a drive source such as an electric motor or the like by rotating directly or via a transmission mechanism. (Claim 3).

In such an example, the rotating device in the rotary drive section is driven to rotate by a drive source via a mechanical transmission mechanism (eg, a gear, a belt and a pulley, a chain and a sprocket, etc.), The rotation unit and the drive source are at different positions in a direction perpendicular to the axis of the rotation unit magnetically driven by the rotation drive unit, and the position of the rotation unit and the drive source in the direction of the axis is Are substantially the same (claim 4). In this case, it is possible to reduce the overall size of the rotating portion in the direction of the axis. That is, the overall thickness can be reduced.

Further, as an example of the magnetic pole structure included in the rotation drive unit, an armature (fixed armature) including an iron core coil portion or an air core coil portion can form a magnetic field rotating around an axis. Things can be mentioned.

The formation of the rotating magnetic field in the armature is performed, for example, by commutating a current flowing through a coil constituting each pole according to a magnetic pole position detected by a sensor (such as a hall sensor) for detecting the magnetic pole position of the rotating portion. It can be carried out. Alternatively, the magnetic pole position can be detected using an induced voltage generated in the armature without using a sensor.

When the magnetic pole structure is an armature composed of an iron core coil portion or an air core coil portion, the rotating portion is directly magnetically driven by the armature in a stationary state with the isolation portion interposed therebetween. Can be configured.

The magnetic pole of the rotating part is opposed to the magnetic pole structure of the rotary driving part, for example, in the axial direction. Further, they may be opposed in the radial direction. The magnetic pole of this rotating part is usually a magnetic pole made of a permanent magnet. When the permanent magnet body is made of a material that easily generates magnetic powder, it is preferable to cover the permanent magnet body with a coating to prevent the generation of magnetic powder.

The isolating section is provided between the space on the rotating section side and the space on the rotary driving section side, and the movement of a substance or heat which is inconvenient for any one side, or the transmission of vibration or noise adversely affects the other side. And that the rotating part can be magnetically driven to rotate by the rotating drive part,
For example, it can be composed of a partition or a diaphragm made of a non-ferromagnetic material (paramagnetic material, diamagnetic material, or the like). The rotating portion or the rotation driving portion may be sealed by the separating portion. Further, the separating portion is a portion (for example, a portion perpendicular to the axial direction) that separates the rotating portion and the rotation driving portion in the axial direction,
Alternatively, a portion (for example, a cylindrical portion coaxial with the axis) that radially separates the rotating portion and the rotation driving portion may be provided.

The rotating portion support for rotatably supporting the rotating portion includes, for example, a sliding bearing (sleeve bearing or the like) or a rolling bearing (ball bearing or the like) supporting the rotating shaft when the rotating portion has a rotating shaft. And a support portion (such as a support frame) that supports such a bearing portion. As a more specific example, a support frame that supports the bearing portion is provided radially outward of the bearing portion, and is detachably held by a holding portion at an outer portion of the support frame (for example, by fitting. Retained).

In the rotating machine, the rotating part may be an impeller.

The impeller may be, for example, one that stirs or sends out a gas such as air, or one that stirs or sends out a liquid such as water. In the case of gas or liquid, by placing food and drink in the space on the rotating part side,
In the agitation of the food and drink, the operation can be performed without causing an undesired substance to be mixed in the food in the space on the rotation drive unit side or without mixing the food and drink in the space on the rotation unit side. The same effect can be obtained when other things exist in the space on the rotating part side.

The impeller may be, for example, an axial fan or a centrifugal fan (such as a sirocco fan).

The impeller includes an axial flow blade provided on one side in the axial direction and a centrifugal blade provided on the outer peripheral side on the other axial side of the axial flow blade. By the forward rotation, the fluid introduced from one side in the axial direction flows through the axial flow blade portion to the centrifugal blade portion, and is discharged radially through the centrifugal blade portion. Item 6).

By combining the blades for axial flow and the blades for centrifugation in this way, the fluid introduced from one side in the axial direction can be efficiently delivered in the radial direction.

When this impeller is used, the magnetic pole structure of the rotating part and the magnetic pole structure of the rotary driving part are such that the magnetic pole of the rotating part is located on one side in the axial direction and the magnetic pole structure of the rotary driving part is on the other side in the axial direction. At least a part of the magnetic pole structure is located radially inward of the centrifugal vane portion, which faces the axial direction in a state where the body is located and is located on the other axial side of the rotating portion in the axial direction. Is preferable (claim 7).

With such a configuration, while the magnetic poles of the rotating portion and the magnetic pole structure of the rotary drive portion are opposed in the axial direction, the fluid introduced from one side in the axial direction is efficiently led out in the radial direction. The dimension of the rotating machine in the axial direction can be shortened and the rotating machine can be made as thin as possible.

[0027]

Embodiments of the present invention will be described with reference to the drawings.

FIGS. 1 to 4 relate to a fan motor which is a rotating machine for stirring and sending out gas as an example of a rotating machine according to an embodiment of the present invention, and FIG. 2 is a plan view, FIG. 3 is a plan view of the impeller 30, FIG.
Is a bottom view of the impeller 30.

This fan motor has an electric motor 20 below the upper bulging portion 10a1 provided at the center of a partition wall 10a constituting a lower portion of a fan casing 10 made of a non-ferromagnetic material. The impeller 30 (rotating part) is located at the center of the motor, and the axis of the motor rotation shaft 20a and the axis of the impeller rotation shaft 30a are located on a certain vertical line.

The rotor 22 of the motor 20 has a rotor magnet 22b provided below the outer peripheral portion of a rotor frame 22a fixed to the upper part of the motor rotating shaft 20a. The rotating part driving permanent magnet body 24 is provided on the upper surface side of the rotor frame 22a in a rotationally symmetric manner with respect to the axis so that alternating magnetic poles are located at every constant center angle in the circumferential direction. The rotation device is configured in a state close to the side surface. The motor rotating shaft 20 a is supported in the radial direction by being inserted into an oil-impregnated bearing 28 in a bearing housing 26 fixed on the base 12, and the lower end of the motor rotating shaft 20 a is axially supported by the upper surface of the base 12. Have been. Also,
A stator 29 is externally fitted and fixed to the bearing housing 26. The rotor 22 is driven to rotate by the excitation current of the coil in the stator 29 being commutated in accordance with the rotational position of each magnetic pole of the rotor magnet 22b. The electric motor 20 is sealed between the base 12 and the partition 10a.

The fan casing 10 has a circular suction port 10b opened upward and a discharge port 10c opened laterally (to the right in the figure). Impeller rotating shaft 30a
Is a trifurcated support frame 3 removably fitted and fixed to the upper outer peripheral portion (holding portion) of the fan casing 10.
2 is supported in the radial direction by being inserted into the sleeve bearing portion 34 located at the center of the partition 2, and the lower end of the impeller rotating shaft 30a is axially supported by the central upper surface of the upper bulging portion 10a1 of the partition wall 10a. I have. Thus, the impeller 30 is rotatably supported in the fan casing 10 coaxially with the circular suction port 10b. The support frame 32 and the sleeve bearing part 34 constitute a rotating part support.

The impeller 30 has an axial flow blade portion 30c composed of a large number of axial flow blades on the outer peripheral side of a hub 30b fixed to the lower end of the impeller rotating shaft 30a, and a large number of centrifugal blades on the lower side of the outer periphery. It has a centrifugal blade portion 30d composed of a blade. Thus, the axial flow blade 30c and the centrifugal blade 30
By combining d, the gas introduced from the circular inlet 10b in the upper opening in the axial direction can be efficiently sent out from the outlet 10c in the side opening.

The rotating portion driven permanent magnet body 36 is provided on the lower surface side of the hub 30b in a rotationally symmetrical manner with respect to the axis so that the magnetic poles alternate in the circumferential direction are positioned at every fixed central angle.
It is close to the upper side surface of the partition 10a. The rotating portion driven permanent magnet body 36 is covered with a coating to prevent generation of magnetic powder.

Since the radial position and the circumferential magnetic pole arrangement of the rotating part driven permanent magnet body 36 and the rotating part driving permanent magnet body 24 are set to be the same, both are arranged in the axial direction with the partition wall 10a interposed therebetween. Opposite poles magnetically attract each other, and the impeller rotation shaft 30a and the motor rotation shaft 20a are magnetically connected. Rotating part drive permanent magnet 24
It is preferable that each of the rotor frame 22a provided with and the hub 30b provided with the rotating portion driven permanent magnet body 36 or a part thereof is made of a ferromagnetic material that functions as a yoke for each permanent magnet body.

The fan casing 10 is fixed to the apparatus on which the fan motor is mounted or constitutes a part of the apparatus, and the circular suction port 10b of the fan casing 10 has an opening in the apparatus. And outlet 1
0c may be external.

When the impeller 30 is rotationally driven by the rotating part driving permanent magnet body 24 in the electric motor 20, both are driven by the partition 10.
a, the lubricating oil and various dusts move from the space on the motor 20 side to the space on the impeller 30 side, and water from the space on the impeller 30 side to the space on the motor 20 side. And other substances that are inconvenient for the electric motor 20 are prevented from moving. Further, since the motor 20 is sealed between the base 12 and the partition 10a, the motor 2
It is possible to prevent mechanical vibration and noise of 0 from being transmitted to the outside as much as possible.

Since the support frame 32 supporting the impeller 30 is detachable from the fan casing 10, the support frame 32 is detached from the fan casing 10, and the impeller 30, the support frame 32, and the sleeve bearing portion 34 are washed, cleaned, and replaced. Etc. can be performed at any time. Therefore, the impeller 30
It is possible to easily and appropriately maintain the state of the space such as the cleanliness of the space on the side and the rotation of the impeller 30.

The magnetic attraction between the rotating portion driven permanent magnet 36 and the rotating portion driving permanent magnet 24 prevents the support frame 32 from separating from the fan casing 10 upward in the axial direction. Works, so the support frame 3
This is useful for stabilizing the holding of the support frame 32 by the upper outer peripheral portion of the fan casing 10 while maintaining the detachability of the fan casing 2.

Further, the lower edge portion of the axial flow blade portion 30c which is inclined downward in the radially outward direction is along the outwardly downwardly inclined surface of the outer peripheral portion of the upper bulging portion 10a1.
c, the lower part of the centrifugal blade portion 30d projecting below the outer peripheral portion of the upper bulging portion 10a1 in the fan casing 10, so that the rotating portion driving permanent magnet 24
While the rotating permanent magnet body 36 and the rotating portion driven permanent magnet body are opposed to each other in the axial direction, the dimension of the entire fan motor in the axial direction can be shortened to make the fan motor as thin as possible.

The electric motor 2 in this fan motor
0 can be a surface facing type in which the stator 29 coil and the rotor magnet 22b face each other in the axial direction.
The rotor 22 of the electric motor 20 and the permanent magnet body 2 for driving the rotating part
Instead of 4, the impeller 30 may be magnetically driven to rotate so that the armature directly faces the rotating portion driven permanent magnet 36 with the partition wall 10 a interposed therebetween in the axial direction. Further, the rotor magnet 22b and the rotating part driving permanent magnet body 24 may be integrally formed by a plastic magnet.

FIGS. 5 and 6 relate to a fan motor as another embodiment of the rotating machine according to the present invention. FIG. 5 is a central longitudinal sectional view and FIG. 6 is a bottom view.

The fan motor includes a motor 50 (drive source) and a rotational drive gear 5 in a box 40 made of a non-ferromagnetic material.
2 (rotating device in the rotation drive unit) is accommodated, and a partition wall 4 that constitutes an upper portion of a fan casing 42 provided in the right half of the box 40 in the drawing.
The rotation drive gear 52 is located above and the impeller 70 (rotating part) is located below the rotation drive gear 2a, and the axis of the rotation drive gear rotation shaft 52a and the impeller rotation shaft 70a is constant in the vertical direction. Located on a straight line. The electric motor 50 and the impeller 70 are located in the left half inside the box 40 and the right half outside the box 40, and their positions in the vertical direction (the direction of the axis of the impeller 70) are almost the same. is there.

The rotor 54 of the electric motor 50 has a rotor frame 54a fixed to the upper and lower intermediate portions of the electric motor rotating shaft 50a.
The rotor magnet 54b is provided on the lower side of the outer peripheral portion. The motor rotating shaft 50a is supported in the radial direction by inserting a lower portion through an oil-impregnated bearing 58 in a bearing housing 56 fixed on the bottom surface of the left half of the box 40, and the lower end of the motor rotating shaft 50a is a bearing. It is supported on the bottom surface of the housing 56 in the axial direction. Further, a stator 60 is externally fixed to the bearing housing 56. The rotor 54 is driven to rotate by the excitation current of the coil in the stator 60 being commutated in accordance with the rotational position of each magnetic pole of the rotor magnet 54b.

A driving gear 6 is provided above the motor rotating shaft 50a.
2 is fixed, and the rotation of the driving gear 62 is transmitted to the rotation driving gear 52 meshing on the further right side via the intermediate gear 64 meshing on the right side. Since the axial direction of each gear is the vertical direction, the vertical dimension of the gear mechanism including the three gears is kept small.

On the lower surface side of the rotation driving gear 52, a rotating portion driving permanent magnet body 66 is rotationally symmetric about the axis so that alternate magnetic poles are located at every constant center angle in the circumferential direction. The rotating device is provided in the vicinity of the upper surface of the partition wall 42a.

The fan casing 42 has a circular suction opening 42b opened downward, and a discharge opening 42c opened laterally (rightward in the figure). Impeller rotating shaft 70a
Is a trifurcated support frame 7 removably fitted and fixed to the lower outer peripheral portion (holding portion) of the fan casing 42.
2 is radially supported by being inserted into a sleeve bearing portion 74 located at the center of the partition 2, and the upper end of the impeller rotating shaft 70a is axially supported by the central lower surface of the partition wall 42a. Thus, the impeller 70 is rotatably supported in the fan casing 42 coaxially with the circular suction port 42b. The support frame 72 and the sleeve bearing 7
4 constitutes a rotating part support.

The impeller 70 is a sirocco fan having a centrifugal blade portion 70c composed of a large number of centrifugal blades on the outer peripheral side of a hub 70b fixed to the lower end of an impeller rotating shaft 70a. The rotating part driven permanent magnet body 76 is provided on the upper surface side of the hub 70b in a rotationally symmetrical manner about the axis so that alternating magnetic poles are located at every constant center angle in the circumferential direction. Close to. The rotating portion driven permanent magnet body 76 is covered with a coating to prevent generation of magnetic powder.

The permanent magnet body 76 for driving the rotating part and the permanent magnet body 66 for driving the rotating part have the same radial position and the same magnetic pole arrangement in the circumferential direction. The different poles magnetically attract each other, and the impeller rotation shaft 70a and the rotation driving gear rotation shaft 52a are magnetically connected. The rotating drive gear 52 or a part thereof provided with the rotating part driving permanent magnet body 66 and the hub 70b or a part thereof provided with the rotating part driven permanent magnet body 76 are respectively provided with a yoke of each permanent magnet body. It is preferably made of a ferromagnetic material that functions as a.

The box 40 is fixed to the apparatus on which the fan motor is mounted or constitutes a part of the apparatus. The circular suction port 42b of the fan casing 42 has an opening in the apparatus. However, the discharge port 42c can communicate with the outside.

When the impeller 70 is driven to rotate by the rotating part driving permanent magnet body 66 in the electric motor 50, both are driven by the partition 42.
a, the lubricating oil and various dusts move from the space on the side of the motor 50 to the space on the side of the impeller 70, and water from the space on the side of the impeller 70 to the space on the side of the motor 50. And other substances that are inconvenient for the electric motor 50 are prevented from moving.

Since the support frame 72 supporting the impeller 70 is detachable from the fan casing 42, the support frame 72 is removed from the fan casing 42, and the impeller 70, the support frame 72, and the sleeve bearing portion 74 are washed, cleaned, and replaced. Etc. can be performed at any time. Therefore, the impeller 70
The state of the space such as the cleanliness of the space on the side and the rotation of the impeller 70 can be easily and appropriately maintained.

The magnetic attraction between the rotating portion driven permanent magnet body 76 and the rotating portion driving permanent magnet body 66 attracts the impeller 70 upward, and the support frame 72 moves from the fan casing 42 in the axial direction. Since it acts so as to prevent the support frame 72 from being detached downward, it is useful for stabilizing the holding of the support frame 72 by the lower outer peripheral portion of the fan casing 42 while maintaining the detachability of the support frame 72.

Further, the rotary drive gear 52 is driven to rotate by the electric motor 50 via a gear mechanism having a small axial dimension, and the rotary drive permanent magnet provided on the rotary drive gear 52. The impeller 70 and the electric motor 50, which are magnetically driven by the motor 66, are located in the right half outside the box 40 and the left half inside the box 40, respectively, and in the vertical direction (the axis of the impeller 70). Since the positions (in the direction of the line) are substantially the same, the overall thickness of the fan motor can be reduced.

It should be noted that the vertical positional relationship in the description of the above embodiment is merely for convenience of explanation based on the drawings, and does not limit the actual use state and the like.

[0055]

In the rotating machine of the present invention, substances or heat which are inconvenient for one side move from the other side to the one side between the space on the rotating part side and the space on the rotary driving part side. It is also possible to remove the rotating unit support supporting the rotating unit from the holding unit and wash or clean the rotating unit or the rotating unit support, or replace the rotating unit or the rotating unit support at any time. Can do. Further, the magnetic attraction between the magnetic poles of the rotating part and the magnetic pole structure effectively serves to stabilize the holding of the rotating part support by the holding part.

In the rotating machine according to the fourth aspect, the rotating part and the driving source are located at different positions, and the positions of the rotating part and the driving source are substantially the same in the direction of the axis of the rotating part. Can be

The rotating machine according to the fifth aspect may comprise a fan motor for stirring or sending out gas or liquid, a pump device, a stirrer and the like.

According to the rotating machine of the sixth aspect, the fluid introduced from one side in the axial direction can be efficiently led out in the radial direction.

In the rotating machine according to the present invention, while the magnetic poles of the rotating portion and the magnetic pole structure of the rotating drive portion are opposed in the axial direction, the fluid introduced from one side in the axial direction can be efficiently removed in the radial direction. And the dimension in the axial direction can be shortened to make it as thin as possible.

[Brief description of the drawings]

FIG. 1 is a central longitudinal sectional view of a fan motor.

FIG. 2 is a plan view of the fan motor.

FIG. 3 is a plan view of the impeller.

FIG. 4 is a bottom view of the impeller.

FIG. 5 is a central longitudinal sectional view of another fan motor.

FIG. 6 is a bottom view of another fan motor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Fan casing 10a Partition wall 10a1 Upper swelling part 10b Circular suction port 10c Discharge port 12 Base 20 Electric motor 20a Electric motor rotating shaft 22 Rotor 22a Rotor frame 22b Rotor magnet 24 Permanent magnet body for rotating part drive 26 Bearing housing 28 Oil-impregnated bearing 29 Stator Reference Signs List 30 impeller 30a impeller rotating shaft 30b hub 30c axial flow blade 30d centrifugal blade 32 support frame 34 sleeve bearing 36 rotating part driven permanent magnet body 40 box body 42 fan casing 42a partition wall 42b circular suction port 42c discharge Mouth 50 Electric motor 50a Electric motor rotation shaft 52 Rotation drive gear 52a Rotation drive gear rotation shaft 54 Rotor 54a Rotor frame 54b Rotor magnet 56 Bearing housing 58 Oil-bearing bearing 60 Stator 62 Driving Car 64 intermediate gear 66 rotating unit driving permanent magnet 70 impeller 70a impeller rotary shaft 70b hub 70c centrifugal vane portion 72 supporting frame 74 sleeve bearing portion 76 rotating part driven permanent magnet body

Claims (7)

[Claims] A rotary drive unit having a magnetic pole structure capable of forming a magnetic field rotating around an axis, and a magnetic pole opposed to the magnetic pole structure of the rotary drive unit, wherein the magnetic drive unit is formed on the rotary drive unit. A rotating part that magnetically acts on the magnetic pole by rotating the magnetic field around the axis, and that is magnetically driven around the axis without contact with the rotation driving part, A rotating unit that rotatably supports the rotating unit, a holding unit that detachably holds the rotating unit support that supports the rotating unit, and an isolating unit that separates the rotating unit and the rotation driving unit. A magnetic attraction force between the magnetic poles and the rotary drive unit prevents the rotary unit support from separating from the holding unit in the axial direction. 2. The rotating machine according to claim 1, wherein the magnetic poles of the rotating part and the magnetic pole components of the rotation driving part are opposed in the axial direction. 3. The rotation drive unit according to claim 1, wherein the rotation device having a magnetic pole formed by a permanent magnet body rotates around an axis and forms a magnetic field that rotates around the axis.
Or the rotating machine according to 2. 4. A rotary device in a rotary drive unit, which is rotationally driven by a drive source via a mechanical transmission mechanism, wherein an axis of the rotary unit magnetically driven by the rotary drive unit. 4. The rotating machine according to claim 1, wherein the rotating unit and the driving source are located at different positions in a direction perpendicular to the axis, and the positions of the rotating unit and the driving source are substantially the same in the direction of the axis. 5. The rotating machine according to claim 1, wherein the rotating portion comprises an impeller. 6. An impeller comprising an axial flow blade provided on one side in the axial direction and a centrifugal blade provided on the outer peripheral side on the other axial side of the axial flow blade. The rotation according to claim 5, wherein the fluid introduced from one side in the axial direction flows through the axial flow blade portion to the centrifugal blade portion by the directional rotation, and is radially led out through the centrifugal blade portion. Machine. 7. The magnetic pole structure of the rotating part and the magnetic pole structure of the rotary driving part, in a state where the magnetic pole of the rotating part is located on one side in the axial direction and the magnetic pole structure of the rotary driving part is located on the other side in the axial direction. The rotating machine according to claim 6, wherein at least a part of the magnetic pole structure is located radially inward of the centrifugal blade portion located on the other side of the rotating portion in the axial direction, facing the axial direction.