Rotating Equipment

Abstract

To provide a rotating machine that can realize the demand for miniaturization.SOLUTION: A rotating machine (1) includes a shaft member (5), a cylindrical rotating body (3) rotatable relative to the shaft member (5), a cylindrical housing (7) surrounding the rotating body (3), a bearing (4) supporting the rotating body (3) relative to the shaft member (5), a stator (2) inside the rotating body (3), and one or more rotor blades (6) provided on the rotating body (3).SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a rotating device, and more particularly to a rotating device that generates air for the purpose of intake or blowing air. [Background technology]

[0002] Traditionally, various rotating devices that generate air for the purpose of intake or blowing have been developed, manufactured, and used according to various applications and required performance. Among these, there is a demand for improved performance, such as higher speed rotation and increased air volume, which are basic performances for generating air, as well as a demand for further miniaturization of the entire device, and there is a demand for the realization of both demands at a higher level. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 56-100063 Summary of the Invention [Problem to be solved by the invention]

[0004] Therefore, one example of an object of the present invention is to provide a rotating device that can meet the demand for miniaturization. Another example of a problem of the present invention is to provide a rotating device that meets the demand for miniaturization and has excellent basic performance in generating wind. [Means for solving the problem]

[0005] The above-mentioned problems can be solved by the present invention. That is, the rotating device of the present invention comprises: A shaft member; a cylindrical rotating body rotatable relative to the shaft member; a cylindrical housing surrounding the rotor; a bearing that supports the rotating body relative to the shaft member; a stator located inside the rotor; One or more rotor blades provided on the rotor; Equipped with. In the rotating device of the present invention, at least one end of the shaft member or a portion thereof may be fixed to the housing.

[0006] In the rotating device of the present invention, a stationary blade may be provided on an inner surface of the housing that faces an outer surface of the rotor. In this case, it is preferable that the rotor blades and the stator blades are arranged side by side at a predetermined interval in the axial direction of the shaft member.

[0007] Furthermore, the rotating device of the present invention includes two bearings, a first bearing and a second bearing, the first bearing is disposed on one of two ends of the shaft member, The second bearing may be disposed on the other end side of the shaft member. In this case, it is preferable that the position of the rotor blade and the position of the first bearing overlap at least partially in the axial direction of the shaft member, and the position of the stator blade and the position of the second bearing overlap at least partially.

[0008] In this case, it is preferable that the one or more moving blades are disposed between the first bearing and the second bearing in the axial direction of the shaft member. In this case, a preload may be applied to an inner peripheral ring of either the first bearing or the second bearing, the inner peripheral ring being fixed to the shaft member, in a direction toward the other bearing.

[0009] In the rotating device of the present invention, the rotor blade may be disposed in a central portion of the rotor in the axial direction of the shaft member. Further, in the rotating device of the present invention, the rotor blade includes a cylindrical portion and a plurality of blades provided on the cylindrical portion, The plurality of blades may be provided on the cylindrical portion at predetermined intervals in the circumferential direction of the cylindrical portion. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a cross-sectional view of a rotating device according to a first embodiment, which is an example of the present invention. [Figure 2] FIG. 2 is a transparent perspective view of a rotating device according to a second embodiment, which is an example of the present invention. [Figure 3] 10 is a transparent cross-sectional view of a cross section including an axis x of a rotating device according to a second embodiment, which is an example of the present invention. FIG. [Figure 4] FIG. 3 is a cross-sectional view taken along the line AA in FIG. 2. [Figure 5] FIG. 10 is a transparent perspective view of a rotating device according to a third embodiment, which is an example of the present invention. [Figure 6] 10 is a transparent cross-sectional view of a cross section including an axis x of a rotating device according to a third embodiment, which is an example of the present invention. FIG. [Figure 7] FIG. 10 is a transparent perspective view of a rotating device according to a fourth embodiment, which is an example of the present invention. [Figure 8] 10 is a transparent cross-sectional view of a cross section including an axis x of a rotating device according to a fourth embodiment, which is an example of the present invention. FIG. [Figure 9] 10 is a cross-sectional view of a cross section including an axis x of a rotating device according to a fifth embodiment, which is an example of the present invention. FIG. [Figure 10] FIG. 10 is a cross-sectional view taken along the line BB in FIG. 9. [Figure 11] FIG. 10 is an explanatory view (cross-sectional view) for explaining the flow of cooling air into the inside of a rotor in a rotating device according to a fifth embodiment which is one example of the present invention. [Figure 12] 10 is a cross-sectional view of a rotating device according to a sixth embodiment of the present invention, taken just before the axis x and parallel to the axis x. FIG. [Figure 13] 10 is a cross-sectional view of a rotating device according to a sixth embodiment of the present invention, in which an inner housing is extracted together with stator blades provided on the inner periphery thereof, and cut along a cross section including an axis x. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0011] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Rotating devices according to embodiments of the present invention will be described below with reference to the drawings. [First embodiment] FIG. 1 is a cross-sectional view of a rotating device 1 according to a first embodiment, which is an example of the present invention. In the description of this embodiment, the terms "upper" and "lower" refer to the upper and lower positions in FIG. 1, and do not necessarily coincide with the upper and lower positions in the direction of gravity.

[0012] Furthermore, in the direction of axis x (hereinafter also referred to as the "axial direction"), the direction of arrow a is the upper side a, and the direction of arrow b is the lower side b. Furthermore, in the direction perpendicular to axis x (hereinafter also referred to as the "radial direction"), the direction away from axis x (the direction of arrow c) is the outer circumferential side c, and the direction toward axis x (the direction of arrow d) is the inner circumferential side d. The clockwise circumferential direction (as seen from the upper side a) around the rotation axis x is the circumferential direction e, and the counterclockwise circumferential direction f. Note that circumferential direction e and circumferential direction f are not shown in FIG. 1.

[0013] In addition, in the description of this embodiment, the rotating part in the rotating device 1 may be referred to as the "rotating side," and the part that supports the rotating side member and is fixed without rotating itself may be referred to as the "fixed side." Furthermore, since the fixed part that does not rotate itself is stationary relative to the rotating part, the fixed part that does not rotate itself may be referred to as the stationary part. The above-described up-down relationship in the drawings, directions such as the axis x direction, upper side a, lower side b, outer circumferential side c, inner circumferential side d, circumferential direction e, and circumferential direction f, and expressions representing parts such as the "rotating side" and the "fixed side" are the same in all subsequent embodiments.

[0014] The rotating device 1 of this embodiment comprises an axial member 5, a rotor 3 which is a cylindrical rotating body that can rotate relative to the axial member 5, a cylindrical housing 7 that surrounds the rotor 3, a bearing 4 that supports the rotor 3 relative to the axial member 5, a stator 2 inside the rotor 3, a plurality of moving blades 6 provided on the rotor 3, and stationary blades 8 provided on the inner surface of the housing 7 that face the outer surface of the rotor 3.

[0015] The stator 2 includes a stator core 21 fixed to the shaft member 5 and having magnetic pole portions 23 extending radially to the outer periphery c with the shaft member 5 as its axis, and a coil 22 wound around the magnetic pole portions 23. The illustrated stator 2 is disposed in the housing 7 so that the gap between the second bearing 42 and the stator 2 is larger than the gap between the first bearing 41 and the stator 2. The stator core 21 is a laminated body made of magnetic materials such as silicon steel plates, and is composed of an annular portion 24 arranged coaxially so as to surround the shaft member 5, and a plurality of magnetic pole portions 23 formed so as to extend radially from the annular portion 24 toward the outer periphery c.

[0016] The coils 22 are wound around each of the plurality of magnetic pole portions 23 in the stator core 21. The stator core 21 and the coils 22 are insulated by an insulator (not shown) made of an insulating material. Instead of the insulator, an insulating film may be painted on the surface of the stator core 21 to insulate it from the coils.

[0017] The rotor 3 includes a magnet 31 facing the magnetic pole portion 23 on the outer circumferential side c of the stator 2, and a cylindrical tubular member 32 on whose inner circumferential surface the magnet 31 is disposed. The tubular member 32 is cylindrical and centered on the axis of the shaft member 5, and surrounds the stator 2. The tubular member 32 also has the function of preventing leakage of a magnetic field from inside the tubular member 32, and is made of a magnetic material. Note that the tubular member 32 may be made of a non-magnetic material such as aluminum or plastic, as long as there are no problems with its characteristics.

[0018] The magnet 31 is attached to the inner circumferential surface of the cylindrical member 32 so as to face the stator 2. The magnet 31 has an annular shape, with regions magnetized to the north pole and regions magnetized to the south pole alternately arranged at regular intervals (or at regular intervals) along the circumferential direction. The magnet 31 may be an annular, integrally molded product, or multiple magnets may be attached side by side to the inner circumferential surface of the cylindrical member 32 and arranged in a cylindrical shape.

[0019] The bearings 4 are arranged on both sides of the stator 2 in the axial direction of the shaft member 5, and include two bearings: a first bearing 41 located on the upper side a and a second bearing 42 located on the lower side b. That is, the magnet 31 and the stator 2 are located between the first bearing 41 and the second bearing 42 in the axial direction of the shaft member 5. The first bearing 41 and the second bearing 42 use members with the same configuration (same shape, structure, size, and material). The following description focuses on the first bearing 41, but the same applies to the second bearing 42.

[0020] The first bearing 41 is a so-called ball bearing that includes an outer ring 41a, an inner ring 41b, and bearing balls 41c interposed between the outer ring 41a and the inner ring 41b. The bearing balls 41c roll between the outer ring 41a and the inner ring 41b, thereby significantly reducing the rotational resistance of the inner ring 41b relative to the outer ring 41a. Due to its function, the first bearing 41 is formed from a material such as a hard metal such as iron or ceramics.

[0021] The inner peripheral ring 41b of the first bearing 41 is loosely fitted onto the shaft member 5 and then fixed with an adhesive. Therefore, the gap between the inner peripheral ring 41b of the first bearing 41 and the shaft member 5 is filled with adhesive, and the inner peripheral ring 41b of the first bearing 41 is fixed to the shaft member 5 and becomes a stationary part together with the shaft member 5. Moreover, the inner peripheral ring 42b of the second bearing is fixed to the shaft member 5 by press fitting and becomes a stationary part together with the shaft member 5. Here, the shaft member 5 and the housing 7 are members that are stationary (relative to) the rotor 3. Therefore, these are collectively referred to as stationary members (stationary parts).

[0022] An outer ring 41a of the first bearing 41 and an outer ring 42a of the second bearing 42 are fixed to the inner peripheral surfaces of both ends of the cylindrical member 32. On the other hand, an inner ring 41b of the first bearing 41 and an inner ring 42b of the second bearing 42 are fixed to the outer peripheral surface of the shaft member 5. This allows the rotor 3 to rotate around the axis x of the shaft member 5 as the central axis. As shown in FIG. 1, in this embodiment, the radial dimension t of the bearing 4 (first bearing 41) is larger than the radial dimension s of the stator 2 (t>s).

[0023] The shaft member 5 is made of, for example, aluminum and is hollow (more specifically, cylindrical) to reduce weight. In this embodiment, the shaft member 5 is a fixed-side member. Since the shaft member 5 has the function of supporting the stator 2, rotor 3, bearings 4, and rotor blades 6 relative to the housing 7, it is required to have rigidity according to this function.

[0024] An opening (not shown) is provided in the middle (intermediate portion) of the shaft member 5, and a lead wire (not shown) connected to the coil 22 is drawn into the cavity inside the shaft member 5 from the opening, and is drawn out to the outside of the rotating device 1 from an end opening (not shown) of the shaft member 5. In the rotating device 1 according to this embodiment, both ends of the cylindrical member 32 are closed by a first bearing 41 and a second bearing 42. Electricity must be supplied to the coil 22 of the stator 2 located within this closed space.

[0025] In the rotating device 1 according to this embodiment, the inside of the space closed by the cylindrical member 32, the bearing 4, etc. is electrically connected to the outside by passing a lead wire through the hollow inside the shaft member 5. Therefore, the lead wire can supply power to the coil 22 of the stator 2 located inside the closed space.

[0026] In the motor portion (referring to the portion consisting of the stator 2, rotor 3, bearing 4, and shaft member 5; the same applies below) of the rotating device 1 configured as above, the rotor 3 surrounding the stator 2 is rotatable relative to the stator 2 fixed to the shaft member 5, and constitutes a so-called outer rotor type brushless motor. In a typical outer rotor type brushless motor, the shaft member fixed to the rotor rotates, and rotational force is extracted by the shaft member, but in the rotating device 1 according to this embodiment, the shaft member 5 is a fixed member, and is configured so that rotational force is extracted directly from the rotor 3.

[0027] The housing 7 is a cylindrical member and is made of, for example, plastic or metal. Although not shown, both axial ends of the housing 7 form openings (hereinafter, the opening on the upper side a will be referred to as the "upper end opening" and the opening on the lower side b will be referred to as the "lower end opening"). A space 77 is formed as an air passage between the inner peripheral surface of the housing 7 and the outer peripheral surface of the tubular member 32, communicating from the upper end opening to the lower end opening.

[0028] Rotating blades 6 are attached to the outer peripheral surface of the cylindrical member 32 of the rotor 3 in a region overlapping with the first bearing 41 in the axial direction (axis x direction) of the shaft member 5, protruding toward the inner peripheral surface of the housing 7 (toward the outer peripheral side c). The rotating blades 6 have a plurality of blades arranged at predetermined intervals in the circumferential direction on the outer peripheral surface of the cylindrical member 32 and rotate with the rotation of the rotor 3. The rotation of the rotating blades 6 generates air in either the up or down direction in the space 77 depending on the direction of rotation. In the rotating device 1 of this embodiment, the rotating device 1 is driven to rotate the rotating blades 6 in the clockwise circumferential direction e, so that air taken in from an upper end opening is blown out from a lower end opening.

[0029] In the rotating device 1 of this embodiment, the position of the rotor blades 6 in the direction of the axis x on the rotor 3 is biased to the upper side a. Because the rotor blades 6 are close to the upper end opening on the air intake side, the rotating device 1 of this embodiment has high air suction efficiency. Meanwhile, because the position of the rotor blades 6 in the direction of the axis x is biased to the upper side a, the position of the center of gravity of the rotor 3 is also biased to the upper side a in order to bias the position of the center of gravity of the rotor 3 to the upper side a accordingly.

[0030] That is, the magnet 31 is disposed at a position in the axial x direction such that the distance between the magnet 31 and the first bearing 41 is closer than the distance between the magnet 31 and the second bearing 42. By bringing the position of the magnet 31 in the axial x direction closer to the position of the rotor blade 6 in the axial x direction, the position of the center of gravity of the rotor 3 and the position of the rotor blade 6 in the axial x direction are brought closer, which makes it easier to stabilize the rotation of the rotor 3. Stabilizing the rotation of the rotor 3 is expected to result in higher speed rotation of the rotor 3 and an increase in the amount of air blown by the rotating device 1.

[0031] The housing 7 includes a cylindrical main body portion (hereinafter referred to as the "housing main body portion") 78 having a bottom portion in which the motor portion and the rotor blades 6 are housed, and a lid body 71 that covers the upper opening of the housing main body portion 78. The lid body 71 includes a flat, cylindrical tubular portion (hereinafter referred to as the "lid tubular portion") 71b, a plurality of (for example, four) spoke portions (hereinafter referred to as the "lid spoke portions") 71a extending from the upper end of the lid tubular portion 71b toward the inner periphery d, and a disk portion (plate portion) 71c to which the lid spoke portions 71a are connected. The area at the upper end of the lid body 71 other than the lid spoke portions 71a and the disk portion 71c forms an upper end opening.

[0032] On the other hand, the housing main body 78 includes a cylindrical portion (hereinafter referred to as the "housing cylindrical portion") 72 and a donut-shaped support portion (hereinafter referred to as the lower support portion) 74 that is connected to the inner periphery of the stator blade 8. The area at the lower end of the housing main body 78 other than the lower support portion 74 forms a lower end opening.

[0033] The lower support portion 74 includes an annular bottom surface portion 74b, a cylindrical portion (hereinafter referred to as the "outer cylindrical portion") 74a that rises from the outer peripheral end of the outer peripheral side c of the bottom surface portion 74b to the upper side a, and a cylindrical portion (hereinafter referred to as the "inner cylindrical portion") 74c that rises slightly from the inner peripheral end of the inner peripheral side d of the bottom surface portion 74b to the upper side a. The annular bottom surface portion 74b serves as a connecting portion that connects the inner cylindrical portion 74c to the inner peripheral portion of the stator blade 8.

[0034] The inner diameter of the inner cylindrical portion 74c is approximately the same as or slightly smaller than the end of the shaft member 5, so that the end of the shaft member 5 is press-fitted into it. In addition, the upper end of the inner cylindrical portion 74c comes into contact with the inner peripheral ring 42b of the second bearing 42, pressing and positioning the inner peripheral ring 42b of the second bearing 42.

[0035] A stage 75 that supports the housing 7 is joined to the surface on the lower side b of the bottom surface portion 74b via a joining plate 76, which serves as another member. The stage 75 has an annular shape when viewed from below, and functions as a connecting member when the rotating device 1 is supported or placed on another member, or as a support base (leg).

[0036] The outer cylindrical portion 74a faces, and maintains a fixed distance from, the inner circumferential surface of the housing cylindrical portion 72. The stator blades 8 are arranged between the outer cylindrical portion 74a and the housing cylindrical portion 72. The stator blades 8 are arranged in a region that overlaps with the second bearing 42 in the axial direction of the shaft member 5 (direction of the axis x).

[0037] The stator blades 8 are components that rectify the downward airflow generated by the rotor blades 6. The shape of the stator blades 8 is a plate-like shape that partitions multiple flow paths parallel to the axial direction of the shaft member 5. Specific examples of the shape include a shape in which cylindrical plate-like shapes of different diameters with the axis x as the central axis are arranged in a ring pattern in the radial direction, and a shape in which plate-like shapes partition multiple straight pipes parallel to the axial direction of the shaft member 5. In the latter case, the shape of the holes when viewed from above or below can be a checkerboard shape, a honeycomb shape, a grid of circles, a grid of triangles, or other polygonal shapes. Furthermore, the direction of the flow paths may be oblique to the axial direction of the shaft member 5, as necessary.

[0038] In this embodiment, the rotor blades 6 and the stator blades 8 are arranged side by side at a predetermined interval in the axial direction (axis x direction) of the shaft member 5. By providing a predetermined interval between the rotor blades 6 and the stator blades 8, the air flow is effectively rectified. Therefore, a larger amount of air can be discharged from the lower end opening with high wind pressure.

[0039] The "predetermined distance" between the rotor blades 6 and the stator blades 8 is not preferable because if they are too close, the flow straightening effect will be insufficient, and if they are too far apart, the wind pressure will decrease. The preferable value of the "predetermined distance" will vary depending on various conditions such as the diameter of the rotor blades 6 and the stator blades 8, the distance between the housing 7 and the rotor 3, and the rotational speed of the rotor blades 6, but it is generally preferable to select the distance from within the range of at least the length L from the base of the rotor blades 6 (the outer peripheral surface of the tubular member 32) to the tip (the end of the outer peripheral side c) and not more than 5 times the length L (5L), and more preferably from the range of at least 2L and not more than 4L.

[0040] A ring-shaped rib 71d that fits onto the end of the shaft member 5 is formed on the lower side b of the disk portion 71c of the lid body 71. The end of the shaft member 5 can be positioned by fitting the end of the shaft member 5 into the recess on the inside of this rib 71d. The end of the shaft member 5 can be positioned by passing the shaft member 5 through a hole in a donut-shaped fixing member 92 and fixing this fixing member 92 to the lower side b of the disk portion 71c of the lid body 71 so that the fixing member 92 covers the rib 71d.

[0041] A disc spring 91, which is an elastic member, is interposed between the lower surface of the fixing member 92 and the upper surface of the inner peripheral ring 41b of the first bearing 41. The disc spring 91, which is fixed while being pressed from above by the fixing member 92, urges the inner peripheral ring 41b of the first bearing 41 downward with its elastic force. In other words, the combination of the disc spring 91 and the fixing member 92 applies a preload to the inner peripheral ring 41b of the first bearing 41 in the direction of the second bearing 42.

[0042] This preloading effect positions the inner ring 41b of the first bearing 41, which is loosely fitted into the shaft member 5, and allows the inner ring 41b of the first bearing 41 to be fixed to the shaft member 5 using adhesive or the like.

[0043] In this embodiment, an example is given in which a preload acts on the inner ring 41b of the first bearing 41 on the upper side a in the direction of the second bearing 42, but the same effect as this embodiment can be achieved even if the opposite configuration is used, i.e., a preload acts on the inner ring 42b of the second bearing 42 on the lower side b in the direction of the first bearing 41.

[0044] The lower end of the cylindrical cover portion 71b is formed with a protrusion 71ba that protrudes from the outer circumferential side c toward the lower side b, and a notch 71bb that is cut out from the end of the lower side b toward the upper side a on the inner circumferential side d. The upper end of the cylindrical housing portion 72 is formed with a protrusion 72a that protrudes from the inner circumferential side d toward the upper side a, and a notch 72b that is cut out from the end of the upper side a toward the lower side b on the outer circumferential side c.

[0045] The lid cylindrical portion 71b of the lid body 71 and the housing cylindrical portion 72 of the housing main body portion 78 are connected by mutually engaging the protrusion (hereinafter referred to as the protrusion) 71ba of the lid cylindrical portion 71b with the recess (hereinafter referred to as the notch) 72b of the housing cylindrical portion 72, and the protrusion 72a of the housing cylindrical portion 72 with the notch 71bb of the lid cylindrical portion 71b.

[0046] As described above, in this embodiment, the housing 7 is formed by separating the housing main body 78 and the lid 71, and the lid 71 can be removed from and attached to the housing main body 78. With the lid 71 removed, the motor portion, to which the rotor blades 6 are attached, is temporarily fixed inside the housing main body 78, and then the lid 71 is attached, thereby manufacturing the rotating device 1 of this embodiment. The motor portion is temporarily fixed to the housing main body 78 by press-fitting the end of the shaft member 5 into the inner cylindrical portion 74c.

[0047] The method of joining the lid 71 and the housing main body 78 may be any of the conventionally known methods, such as fitting, screwing, locking, screw fastening, clip fastening, tape application, adhesion, welding, etc. However, if the lid 71 can be removed again after being attached to the housing main body 78, it can be repaired or replaced in the event of a malfunction of the rotating device 1. From this perspective, fitting, screwing, locking, screw fastening, clip fastening, or tape application is preferred.

[0048] The rotating device 1 according to this embodiment as described above has a configuration in which the shaft member 5 is fixed and the rotor 3, which is a rotating body, rotates relative to the shaft member 5 via the bearing 4, so that the radial dimension s of the stator 2 can be made smaller than the radial dimension t of the bearing 4 (t>s), as shown in Fig. 1. Therefore, the stator 2 can be made very small.

[0049] In a rotating device having a conventional outer rotor type brushless motor configuration in which the rotor 3 and the shaft 5 are fixed and rotate together, a bearing must be disposed between the stator, which is the fixed side located inside the rotor, and the shaft 5. Therefore, the radius s of the stator is necessarily larger than the radius t of the bearing 4 (t <s)なってしまう。

[0050] However, with the configuration of this embodiment, it is possible to make the radial dimension s of the stator smaller than the radial dimension t of the bearing (t>s), or to make them the same (t=s), thereby realizing miniaturization of the entire rotating device.

[0051] The rotating device 1 according to this embodiment is configured such that rotor blades 6 are provided on the outer peripheral surface of the rotor 3, which is a rotating body, and a cylindrical housing 7 is provided to surround it, so that one of the openings at both ends of the housing 7 serves as an intake port and the other as an exhaust port, and the motor portion and rotor blades 6 can be housed in the internal space of the housing 7. In particular, because the rotor blades 6 are located in the flow path (sometimes called an air passage) through which air flows, space can be saved and the entire rotating device can be made smaller.

[0052] Furthermore, in the rotating device 1 according to this embodiment, the space 77 communicating from the upper end opening to the lower end opening is hollow so as not to obstruct the flow of air by any member other than the lid spokes 71a and the stator blades 8. Furthermore, the space 77 is straight, except for the space occupied by the cylindrical motor, so that the air can flow in a straight line. Therefore, by rotating the rotor blades 6, the air can be sent out in a straight line from the upper end opening to the lower end opening. Therefore, the rotating device 1 according to this embodiment can efficiently send out air, thereby realizing the supply of a strong wind and a large volume of air.

[0053] Furthermore, when stator vanes 8 for rectifying the flow are provided in the portion of the housing cylindrical portion 72 downstream of the rotor blades 6 (on the bearing 42 side), the stator vanes 8 can also be accommodated as they are within the internal space of the housing 7, thereby saving space and preventing an increase in the size of the rotating equipment. In this case, to further rectify the air by the stator vanes 8, it is desirable to separate the rotor blades 6 and the stator vanes 8 to a certain extent (set at a predetermined distance). According to the configuration of this embodiment, the rotor blades 6 and the stator vanes 8 can be arranged inside the housing 7 in the axial direction of the shaft member 5, making it easy to adjust the distance between them appropriately. Therefore, according to this embodiment, it is possible to design the rotor blades 6 and the stator vanes 8 to have high air rectification efficiency.

[0054] In this embodiment, in the axial direction (axis x direction) of the shaft member 5, the rotor blades 6 partially overlap with the first bearing 41, and the stator blades 8 partially overlap with the second bearing 42. By positioning the rotor blades 6 so that they at least partially overlap with the first bearing 41, the rotor blades 6 are closer to the upper end opening on the air intake side, thereby increasing the air suction efficiency, and by positioning the stator blades 8 so that they at least partially overlap with the second bearing 42, a gap between the rotor blades 6 and stator blades 8 can be secured, and the rectification efficiency of the stator blades can be increased despite the compact size.

[0055] Furthermore, in a rotating device with a conventional motor configuration in which a rotating shaft member protrudes from the motor, one side of the shaft member is supported while rotating, and rotational force is extracted from the other protruding end, which makes it easy for rotational fluctuations to occur. However, in the rotating device 1 of this embodiment, the rotor 3 itself, supported by the bearing 4, rotates as a rotating body, and therefore the rotation of the rotor 3 is stable.

[0056] Furthermore, in the rotating device 1 according to this embodiment, the first bearing 41 and the second bearing 42 are fixed to both ends of the rotor 3, respectively, to support the rotor 3 as a rotating body, thereby stabilizing the rotation of the rotor 3 relative to the shaft member 5. In particular, the magnet 31, which is a component of the rotor 3 as a rotating body and has a predetermined weight, is located in the axial direction of the shaft member 5 between the first bearing 41 and the second bearing 42 that rotatably support the rotor 3, resulting in good balance in the axial direction and stabilizing the rotation of the rotor 3.

[0057] It is more desirable to dispose the bearings at both ends of the rotor, as in this embodiment, but if they are located near both ends of the rotor, the rotation of the rotor relative to the shaft member will be sufficiently stable. "Near" here means a position close to both ends of the rotor, and cannot be clearly defined numerically, but for example, a region 20% of the length from both ends of the rotor in the axial direction, or preferably a region 10% of the length from both ends, is included in the concept of "near both ends."

[0058] Furthermore, in the rotating device 1 according to this embodiment, the first bearing 41 and the second bearing 42 are components of the same configuration, so the axial balance of the rotating part consisting of the outer rings 41a, 42a, which are part of the bearing 4, and the rotor 3 is improved, and furthermore, the axial balance of the rotating device 1 as a whole is improved, so from this perspective as well, the rotation of the rotor 3 is stabilized.

[0059] As described above, the rotating device 1 according to this embodiment can realize a reduction in the size of the entire device, and can also achieve high-precision stabilization by preventing fluctuations in the rotation of the rotor 3. Furthermore, stabilizing the rotation of the rotor 3 means that rotational irregularities are less likely to occur, which can also realize a high torque for the rotating device 1. In other words, the rotating device 1 according to this embodiment can provide a device that is excellent in characteristics as a rotating device while realizing miniaturization.

[0060] In the first embodiment described above, an example is given in which both the upper and lower ends of the shaft member 5 are fixed to the housing 7, but it is sufficient that the fixed side shaft member 5 is fixed to the housing 7 in some way, so it is sufficient that at least one end or its vicinity is fixed to the housing.

[0061] In the first embodiment, the fixing member 92 is fixed to the lower side b of the disk portion 71c, and the disc spring 91 is fixed in a state in which it is pressed down from above by the fixing member 92, but this configuration is not limiting. If necessary, both or either of the fixing member 92 and the disc spring 91 may be omitted.

[0062] Furthermore, if necessary, a spacer may be provided between the second bearing 42 and the magnet 31 in the axial direction of the shaft member 5, and this spacer may be used to position the second bearing 42 on the inner surface of the cylindrical member 32 in the axial direction of the shaft member. In this case, of the end of the magnet 31 on the second bearing 42 side, a portion closer to the stator 2 may be arranged to protrude toward the second bearing 42 side, thereby supporting the spacer. Furthermore, if necessary, it is not necessary to provide a spacer between the second bearing 42 and the magnet 31 in the axial direction of the shaft member 5.

[0063] In the first embodiment, the rotating device 1 includes a housing 7. However, the housing 7 may not be provided if necessary. Therefore, the rotating device 1 of the present application includes a configuration in which the housing 7 is provided or not provided. The present application also discloses a rotating device including a shaft member, a cylindrical rotating body rotatable relative to the shaft member, a bearing that supports the rotating body relative to the shaft member, a stator inside the rotating body, and one or more rotor blades provided on the rotating body. This rotating device can be made smaller. Furthermore, the present application discloses that the rotating device includes a magnet attached to the inner surface of the cylindrical member, where an end of the magnet on the first bearing side is closer to the second bearing than an end of the stator on the first bearing side, and an end of the magnet on the second bearing side is closer to the second bearing than an end of the stator on the second bearing side, and the rotor blade is positioned to overlap the first bearing or the end of the magnet on the first bearing side in the axial direction of the shaft member. The rotating device also includes a magnet (for example, an end portion on the first bearing side) that is provided at a position that overlaps with a part of the rotor blade in the axial direction of the shaft member. This rotating device can achieve good balance in the axial direction.

[0064] Furthermore, if necessary, the housing cylindrical portion 72 and the lower support portion 74 may be formed integrally or as a single member.

[0065] In the first embodiment, the rotor blades 6 are attached to the outer peripheral surface of the cylindrical member 32 of the rotor 3 in a region overlapping with the first bearing 41 in the axial direction (axis x direction) of the shaft member 5. However, the invention is not limited to this, and the rotor blades 6 may be attached directly to the outer peripheral surface of the cylindrical member 32 of the rotor 3 or via another member.

[0066] In the first embodiment, a plurality of rotor blades 6 projecting toward the inner peripheral surface of the housing 7 (toward the outer peripheral side c) are attached in the circumferential direction to the outer peripheral surface of the cylindrical member 32 of the rotor 3 in an area overlapping with the first bearing 41 in the axial direction (axis x direction) of the shaft member 5. However, this is not limiting, and a plurality of rotor blades may be arranged side by side in the axial direction of the shaft member 5.

[0067] [Second embodiment] Fig. 2 is a transparent perspective view of a rotating device 201 according to a second embodiment which is an example of the present invention, and Fig. 3 is a transparent cross-sectional view of a cross section including an axis x of the rotating device 201. In Fig. 2 and Fig. 3, a housing 207 is shown in a transparent state by being drawn with imaginary lines (two-dot chain lines).

[0068] 4 is a cross-sectional view of a cross section (cross section AA in FIG. 2) perpendicular to the direction of the axis x of the rotating device 201. Note that imaginary lines indicating the housing 207 are omitted in FIG. 2, 3, and 4, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. The following description will mainly focus on the configuration unique to this embodiment. In the following embodiments, the suction port and the exhaust port are vents, and are described as suction port and exhaust port for convenience in relation to the direction of the air. Depending on the direction of the air, the suction port can become an exhaust port, and the exhaust port can also become a suction port. The present invention is not limited by the descriptions of the suction port and the exhaust port in each embodiment.

[0069] In the rotating device 201 according to this embodiment, the housing 207 is composed of two members: a cylindrical first housing (hereinafter referred to as the upper housing) 207a and a second housing (hereinafter referred to as the lower housing) 207b. The upper housing 207a and the lower housing 207b are fitted together and fixed as shown in FIGS. 2 and 3 to form the integrated housing 207.

[0070] Some of the components of the rotating device 201 are housed inside the housing 207, and a shaft member 5 is fixed to the upper end of the upper housing 207a and the lower end of the lower housing 207b. The housing 207 and the shaft member 5 constitute fixed members. An upper end opening 275 and a lower end opening 276 are provided at the upper end of the upper housing 207a and the lower end of the lower housing 207b, and the upper opening 275 and the lower opening 276 each surround the shaft member 5.

[0071] In the rotating device 201 according to this embodiment, the rotor blades 206 are attached to the central portion in the direction of the axis x on the outer circumferential surface of the rotor 203. The rotor blades 206 have a plurality of blades 262 provided at predetermined intervals on the outer circumferential surface of a cylindrical portion 261, and extend radially in the circumferential direction. As shown in Fig. 4, when viewed from one side in the direction of the axis x (upper side a in Fig. 4), the rotor blades 206 partially overlap each other and are arranged without any gaps.

[0072] The moving blades 206 rotate together with the rotor 203, and the rotating moving blades 206 generate an air flow in accordance with the rotation of the moving blades 206. This air flow is generated in a space 277 between the housing 207 and the rotor 203 in either an upward or downward direction in the axial direction of the shaft member 5.

[0073] In the rotating device 201 of this embodiment, the rotating device 201 is driven to rotate the rotor blades 206 in the counterclockwise circumferential direction f, so that air taken in from the upper end opening 275 is blown out from the lower end opening 276.

[0074] The rotor blades 206 are disposed at the center of the outer circumferential surface of the rotor 203 (rotating body) in the axial direction (axis x direction) of the shaft member 5. At the center position of the rotor 203, the amplitude of vibrations generated in the rotor 203 is relatively small in the axial direction of the shaft member 5, so that the vibrations generated in the rotor 203 are less likely to propagate to the housing 207, and it is possible to suppress the generation of vibrations in the entire rotating device.

[0075] The cylindrical member 232 of the rotor 203 is provided with suction ports 233 as ventilation ports and exhaust ports 234 as ventilation ports. In the axial direction (axis x direction) of the shaft member 5, the suction ports 233 are provided in a portion of the cylindrical member 232 between the first bearing (bearing) 41 and the rotor blade 206. The exhaust ports 234 are provided in a portion of the cylindrical member 232 between the second bearing (bearing) 42 and the rotor blade 206. The suction ports 233 and the exhaust ports 234 are formed in a rectangular shape with the circumferential direction ef as the longitudinal direction. The multiple suction ports 233 and the multiple exhaust ports 234 are arranged at equal intervals in the circumferential direction ef. Note that, depending on the rotation direction of the rotor 203, the suction ports 233 may function as exhaust ports and the exhaust ports 234 may function as suction ports.

[0076] Due to the influence of air generated in space 277 by the rotation of rotor blade 206, air is drawn downward (in the direction of arrow b) through suction port 233 into rotor 203, and the air is discharged from discharge port 234. The air taken in through suction port 233 cools stator 2 including stator core 21 and coil 22 inside rotor 3, passes between multiple magnetic pole portions 23 of stator core 21 and magnetic gap G formed between magnet 31 and stator 2, and is then discharged from discharge port 234.

[0077] Therefore, in the rotating device 201 according to this embodiment, a large amount of cooling air can be sent into the rotor 203, and the stator 2 including the heated coil can be efficiently cooled. In addition, in this embodiment, the same configuration as in the first embodiment operates in the same manner and provides the same effects.

[0078] [Third embodiment] FIG. 5 is a perspective view of a rotating device 301 according to a third embodiment of the present invention, and FIG. 6 is a perspective cross-sectional view of the rotating device 301 taken along a plane including the axis x. 5 and 6, the same components as those in the first and second embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted. In the following description, the configuration of this embodiment that is different from the above embodiments will be mainly described.

[0079] In the rotating device 301 according to this embodiment, two rotor blades 306a, 306b are attached to the outer peripheral surface of the rotor 303 at two positions, one above the other in the direction of the axis x. The rotor blades 306a, 306b have the same shape and, similar to the rotor blades 206 in the second embodiment, are configured such that a plurality of blades 362a, 362b are radially provided at predetermined intervals on the outer periphery of cylindrical portions 361a, 361b. Other configurations are also similar to those of the rotor blade 206 in the second embodiment.

[0080] The moving blades 306a and 306b rotate together with the rotor 303, and the rotation of the moving blades 306a and 306b generates an air flow, which flows in either the upward or downward direction in the space 377. The presence of the two moving blades 306a and 306b can increase the air volume and speed. In the rotating device 301 of this embodiment, the rotating device 301 is driven to rotate the rotor blades 306a, 306b in the counterclockwise circumferential direction f, so that air taken in from the upper end opening 275 is blown out from the lower end opening 276.

[0081] In the radial direction of the rotor 303, the moving blade 306a is arranged on the outer peripheral surface of the cylindrical member 332 that is on the housing 207 side with respect to the bearing 41. In addition, in the radial direction of the rotor 303, the moving blade 306b is arranged on the outer peripheral surface of the cylindrical member 332 that is on the housing 207 side with respect to the bearing 42. In addition, the moving blade 306a and the moving blade 306b are arranged at equal distances from the center of the rotor 303 (rotating body) in the axial direction of the shaft member 5 (direction of the axis x).

[0082] In the axial direction (axis x direction) of the shaft member 5, the position of the moving blade 306a overlaps with the position of the first bearing 41, and the position of the moving blade 306b overlaps with the position of the second bearing 42. By arranging the moving blade 306a in a position that overlaps at least partially with the position of the first bearing 41, it is possible to bring it closer to the upper end opening 275 on the air intake side, thereby improving the air suction efficiency. Furthermore, by arranging the moving blade 306b in a position that overlaps at least partially with the position of the second bearing 42, it is possible to bring it closer to the lower end opening 276 on the air blowing side, thereby improving the air blowing efficiency.

[0083] In addition, in the direction in which air flows through the rotor blades 306a and 306b (i.e., the same as the axial direction of the shaft member 5 (axis x direction)), an intake port 233 is provided on the rotor blade 306b side relative to the rotor blade 306a, and an exhaust port 234 is provided on the rotor blade 306a side relative to the rotor blade 306b.

[0084] For example, air taken in through upper-end opening 275 and sent by rotor blade 306a becomes relatively high-pressure in a region that is a part of space 377 on the rotor blade 306b side relative to rotor blade 306a. Since suction port 233 is provided in the relatively high-pressure region, cooling air inside rotor 303 (hereinafter simply referred to as "cooling air") is efficiently drawn into rotor 303, as if being forced into the space inside rotor 303 through suction port 233, separate from the air flow passing between housing 207 and rotor 303 (hereinafter sometimes referred to as "main air flow"). Furthermore, air is sent out by rotor blade 306b to lower-end opening 276, and becomes relatively low-pressure in another part of space 377 on the rotor blade 306a side relative to rotor blade 306b. Since exhaust port 234 is provided in the other part of space 377 that becomes relatively low-pressure, the cooling air is efficiently discharged to the outside of rotor 303, as if being drawn from the inside of rotor 303.

[0085] Therefore, in the rotating device 301 according to this embodiment, a larger amount of cooling air can be sent into the rotor 303, and the stator 2 having the heating coil can be cooled more efficiently. In addition, in this embodiment, the same configuration as in the first embodiment or the second embodiment operates in the same manner and provides the same effects.

[0086] [Fourth embodiment] FIG. 7 is a perspective view of a rotating device 401 according to a fourth embodiment of the present invention, and FIG. 8 is a perspective cross-sectional view of the rotating device 401 taken along a plane including the axis x. 7 and 8, the same components as those in the first and second embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted. The following description will mainly focus on the configuration unique to this embodiment.

[0087] In the rotating device 401 according to this embodiment, the rotor blades 406 are attached to an upper portion (first bearing 41 side) in the direction of the axis x on the outer circumferential surface of the rotor 203. The rotor blades 406 are similar to the rotor blades 206 in the second embodiment, and have a configuration in which a plurality of blades 462 are arranged at predetermined intervals on the outer circumferential surface of a cylindrical portion 461 and extend radially in the radial direction. Other configurations are also similar to those of the rotor blades 206 in the second embodiment.

[0088] In the rotating device 401 according to this embodiment, the rotor blades 406 are positioned to overlap the bearings 41 in the axial direction (axis x direction) of the shaft member 5, and a portion of the rotor blades 406 faces the bearings 41 via the cylindrical member 232 in the radial direction. Also, a ring member 409 (hereinafter referred to as a balance ring) is provided on the cylindrical member 232 in the axial direction (axis x direction) of the shaft member 5. The balance ring 409 is positioned to overlap the bearings 42, and a portion of the balance ring 409 faces the bearings 42 via the cylindrical member 232 in the radial direction.

[0089] Furthermore, a balance ring 409 is disposed in the axial direction (axis x direction) of the shaft member 5, at a position symmetrical to the rotor blades 406, with the center of gravity being the center of the rotor 203 (rotating body). The weight of the balance ring 409 is adjusted so that the weights at both ends of the rotor 203 are the same in the axial direction of the shaft member 5. Alternatively, the weight of the balance ring is adjusted so that it is the same as the rotor blades 406. Therefore, the position of the center of gravity of the rotating members (rotor 203, rotor blades 406, balance ring 409, etc.) in the axial direction (axis x direction) of the shaft member 5 is adjusted so that it is located at, for example, the center of the rotor 203. The balance ring is formed of a weight material, such as a resin material or a metal material.

[0090] In the axial direction (axis x direction) of the shaft member 5, the position of the moving blade 406 overlaps with the position of the first bearing 41. By arranging the moving blade 406 in a position where it at least partially overlaps with the position of the first bearing 41, it is possible to bring the moving blade 406 closer to the upper end opening 275 on the air intake side, thereby increasing the efficiency of air suction.

[0091] In addition, in the axial direction of the shaft member 5, in the direction of air by the rotor blades 406 (i.e., the same as the axial direction of the shaft member 5 (axis x direction)), a suction port 233 is provided at a position on the balance ring 409 side of the rotor blades 406.

[0092] Therefore, in the rotating device 401 according to this embodiment, a larger amount of cooling air can be sent into the internal space of the rotor 203, and the stator 2 having the heated coil can be cooled more efficiently. In addition, in this embodiment, the same configuration as in the first embodiment or the second embodiment operates in the same manner and provides the same effects.

[0093] [Fifth embodiment] Fig. 9 is a cross-sectional view of a rotating device 501 according to a fifth embodiment of the present invention, the cross-section including the axis x. Fig. 10 is a cross-sectional view of the rotating device 501 perpendicular to the axis x direction (cross-section BB in Fig. 9).

[0094] 9 and 10, components having the same configuration as those in the third embodiment (and further the first and second embodiments) are denoted by the same reference numerals, and detailed description thereof will be omitted. The following description will mainly focus on the configuration unique to this embodiment.

[0095] The rotating device 501 according to this embodiment differs from the rotating device 301 according to the third embodiment only in the configuration of the housing 507. That is, in this embodiment, the housing 507 is composed of three members: a concave first housing (hereinafter referred to as the upper housing) 507a, a cylindrical second housing (hereinafter referred to as the middle housing) 507b, and a concave third housing (hereinafter referred to as the lower housing) 507c. An upper end opening 275 is formed in the upper part of the upper housing 507a, which is one end of the housing 507. A lower end opening 276 is formed in the lower part of the lower housing 507c, which is the other end of the housing 507. The upper housing 507a, the middle housing 507b, and the lower housing 507c are fitted together and fixed as shown in FIG. 9 to form the integrated housing 507.

[0096] The rotor blade 306a is disposed in a state surrounded by the upper housing 507a. The rotor blade 306b is disposed in a state surrounded by the lower housing 507c. Therefore, if the configuration is the same as that of the third embodiment, a cavity serving as an open space extends in the space 577 between the middle housing 507b and the rotor 203. In this embodiment, a stator vane 579 is provided in this space 577. This stator vane 579 is provided, for example, on a portion of the inner circumferential surface of the housing 307 located between the two rotor blades 306a, 306b, or on a portion of the inner circumferential surface of the housing 207 located between the rotor blade 406 and the balance ring 409 in the fourth embodiment; such a stator vane will be referred to hereinafter as an "intermediate stator vane."

[0097] 10, the intermediate stator vanes 579 extend in the direction of the axis x from a part of the inner circumferential surface of the intermediate housing 507b, and extend from a part of the inner circumferential surface of the intermediate housing 507b toward the rotor 203. The intermediate stator vanes 579 have a plate-like shape formed by a surface parallel to the axis x, and a plurality of the intermediate stator vanes 579 (eight in this embodiment) are provided at equal intervals in the circumferential direction ef. By providing the intermediate stator vanes 579, the space 577 is divided by the plurality of intermediate stator vanes 579 into a plurality of wind passages (hereinafter referred to as "wind paths") along the flow path through which the air flows. According to this embodiment, the space 577 is divided into a plurality of air passages by the intermediate stator vanes 579, so that the air flow is rectified and the air volume can be increased.

[0098] Furthermore, in the rotating device 501 according to this embodiment, similarly to the second to fourth embodiments, the tubular member 232 of the rotor 203 is provided with the suction port 233 and the discharge port 234. By combining the suction port 233 and the discharge port 234 with the intermediate stator vane 579, it is possible to more efficiently take in cooling air into the rotor 3.

[0099] 11 is an explanatory diagram for explaining the flow of cooling air into the inside of the rotor 3. FIG. 11 is a transparent cross-sectional view similar to FIG. In the main air direction by the rotor blades 306a and 306b (i.e., the same as the axial direction (axis x direction) of the shaft member 5), an inlet 233 is provided at a position on the rotor blade 306b side relative to the rotor blade 306a, and an outlet 234 is provided at a position on the rotor blade 306a side relative to the rotor blade 306b. In the axial direction of the shaft member 5 (axis x direction), the position of the inlet 233 overlaps with the position of the upper end of the intermediate stator vane 579, and the position of the outlet 234 overlaps with the position of the lower end of the intermediate stator vane 579.

[0100] The air taken in from upper end opening 275 and sent by rotor blade 306a flows into a partial region of space 577 on the rotor blade 306b side of rotor blade 306a. The air that has flowed into this region is rectified as it passes through a space partitioned by multiple intermediate stator vanes 579, and the rectified air is forced into the interior of rotor 203 from suction ports 233 provided in this region, separately from the main air, and cools stator 2.

[0101] Therefore, as shown by the dotted arrows in Fig. 11, air is more efficiently sucked into the interior of rotor 203. The cooling air taken in from suction port 233 flows toward bearing 42 through gaps formed in stator 2 (for example, gaps between multiple magnetic pole portions 23 and gap G between stator core 21 and magnet 31) while cooling stator 2 made up of stator core 21 and coil 22 inside rotor 203, as shown by the solid arrows in Fig. 11.

[0102] On the other hand, the main air is sent by rotor blade 306b toward lower end opening 276 and flows into a partial region of space 577 on the rotor blade 306a side of rotor blade 306b. The air that has flowed into this region passes through a space partitioned by multiple intermediate stator vanes 579, where it is straightened, and is then discharged by rotor blade 306b toward lower end opening 276. Therefore, as shown by the dotted arrows in Figure 11, the main air is more efficiently discharged together with the cooling air discharged from inside rotor 203.

[0103] Therefore, in the rotating device 501 according to this embodiment, it is possible to send even more cooling air into the rotor 203, and it is possible to cool the stator 2 having the heated coils even more efficiently. In addition, in this embodiment, the same configuration as in the first, second, or third embodiment operates in the same manner and provides the same effects.

[0104] [Sixth embodiment] 12 is a transparent cross-sectional view of a section parallel to the axis x, taken just before the axis x, of a rotating device 601 according to a sixth embodiment of the present invention. The rotating device 601 according to this embodiment differs from the rotating device 501 according to the fifth embodiment only in the configuration of the stator vanes provided on the inner circumferential surface of the inner housing.

[0105] 12 according to this embodiment, similarly to the fifth embodiment, the same reference numerals are used to designate the same components as those in the third embodiment (and further the first and second embodiments), and detailed descriptions thereof will be omitted. In the following description, the description will be centered mainly on the configuration unique to this embodiment.

[0106] Similar to the fifth embodiment, the housing 607 in this embodiment is composed of three members: an upper housing 507a, a cylindrical middle housing 607b, and a lower housing 507c. The upper housing 507a, the middle housing 607b, and the lower housing 507c are fitted together and fixed as shown in FIG. 12 to form the integrated housing 607.

[0107] 13 is a cross-sectional view of the rotating device 601 according to this embodiment, taken along a plane including the axis x, with the intermediate housing 607b removed together with intermediate stator vanes (stator vanes) 679a, 679b provided on the inner circumferential surface thereof. As shown in FIG. 13, the intermediate stator vanes 679a, 679b have a plate-like shape similar to the fifth embodiment, and extend in the direction of the axis x from the inner circumferential surface of the intermediate housing 607b. Furthermore, in the radial direction of the rotor 203, the intermediate stator vanes 679a, 679b extend from the inner circumferential surface of the intermediate housing 607b toward the rotor 203. However, unlike the fifth embodiment, the intermediate stator vanes 679a, 679b have surfaces that are inclined with respect to the axis x.

[0108] The intermediate stator vane 679a is inclined counterclockwise (circumferential direction f) from the top (a part of the intermediate housing 607b on the bearing 41 side) to the bottom (another part of the intermediate housing 607b on the bearing 42 side), and the intermediate stator vane 679b is inclined clockwise (circumferential direction e) from the top to the bottom.

[0109] The intermediate stator vanes 679a and the intermediate stator vanes 679b are arranged alternately in the circumferential direction ef, and the directions of inclination are staggered. Specifically, in the circumferential direction of the rotor 203, the position of one end 679a1 (the end on the bearing 41 or the rotor blade 306a side) of the intermediate stator vane 679a is different from the position of the other end (the end on the bearing 42 or the rotor blade 306b side). Similarly, in the circumferential direction of the rotor 203, the position of one end 679b1 (the end on the bearing 41 or the rotor blade 306a side) of the intermediate stator vane 679b is different from the position of the other end 679b2 (the end on the bearing 42 or the rotor blade 306b side).

[0110] Furthermore, one end 679a1 of the intermediate stator vane 679a is close to one end 679b1 of the intermediate stator vane 679b, and the other end 679a2 of the intermediate stator vane 679a is spaced apart from the other end 679b2 of the intermediate stator vane 679b in the circumferential direction of the rotor 203. In other words, the distance between one end 679a1 of the intermediate stator vane 679a and one end 679b1 of the intermediate stator vane 679b in the circumferential direction of the rotor 203 is shorter than the distance between the other end 679a2 of the intermediate stator vane 679a and the other end 679b2 of the intermediate stator vane 679b.

[0111] By providing the intermediate stator vanes 679a and 679b, the space 677 is divided into a plurality of air passages (eight in this embodiment) along the main air flow path. According to this embodiment, the space 677 is divided into a plurality of air passages 677x, 677y by the intermediate stator vanes 679a, 679b, thereby rectifying the air flow and increasing the air volume.

[0112] The width of an air passage 677x between an intermediate stator vane 679a and its adjacent intermediate stator vane 679b on the circumferential direction f of the rotor 203 is formed to narrow in the air flow direction. On the other hand, the width of an air passage 677y between an intermediate stator vane 679a and its adjacent intermediate stator vane 679b on the circumferential direction e of the rotor 203 is formed to widen in the air flow direction. That is, in the air passage 677x formed by the adjacent intermediate stator vanes 679a and 679b, the air passage 677x on the bearing 41 or rotor blade 306a side is wide, and the air passage 677x on the bearing 42 or rotor blade 306b side is narrow.

[0113] In the main air direction through rotor blades 306a and 306b (i.e., the same as the axial direction (axis x direction) of shaft member 5), an air vent 633 is provided on the rotor blade 306b side relative to the position of rotor blade 306a, and an air vent 634 is provided on the rotor blade 306a side relative to the position of rotor blade 306b. Air vent 633 is the same as the suction port 233 in the second to fifth embodiments, and air vent 634 is the same as the discharge port 234 in the second to fifth embodiments. In the axial direction of shaft member 5 (axis x direction), the position of air vent 633 overlaps with the position of upper ends of intermediate stator vanes 679a, 679b, and the position of air vent 634 overlaps with the position of lower ends of intermediate stator vanes 679a, 679b.

[0114] In air passage 677y, the air in air passage 677y at the upstream side (the side of bearing 41 or rotor blade 306a) is dense, while the air in air passage 677y at the downstream side (the side of bearing 42 or rotor blade 306b) is sparse. Therefore, air passage 677y widens downstream, and the air changes from a dense state to a sparse state and expands, causing the pressure in air passage 677y at the lower end side (the side of bearing 42 or rotor blade 306b) to be low, and the pressure in air passage 677y at the upper end side (the side of bearing 41 or rotor blade 306a) to be relatively high. Due to this pressure difference, the air in air passage 677y, which is at a relatively high pressure, is taken into rotor 203 through vent 633 as cooling air, and the air in air passage 677y, which is at a relatively low pressure, is discharged to the outside of rotor 203 through vent 634 as cooling air.

[0115] In air passage 677x, the flow of cooling air passing through vents 633 and 634 is opposite to that in air passage 677y. In air passage 677x, the air in air passage 677x on the downstream side (bearing 42 or rotor blade 306b side) is dense, and the air in air passage 677x on the upstream side (bearing 41 or rotor blade 306a side) is sparse.

[0116] Therefore, since air passage 677x widens upstream, the air changes from a sparse state to a dense state and is compressed, so that the pressure in air passage 677x on the lower end side (the bearing 42 or rotor blade 306b side) becomes relatively high, and the pressure in air passage 677x on the upper end side (the bearing 41 or rotor blade 306a side) becomes relatively low. Due to this pressure difference, the air in air passage 677x, which is at a relatively high pressure, is taken into rotor 203 through vent 634 as cooling air, and the air in air passage 677x, which is at a relatively low pressure, is discharged to the outside of rotor 203 through vent 633 as cooling air.

[0117] As described above, in the rotating device 601 according to this embodiment, the widths of the air passages 677x, 677y gradually change in the air flow direction due to the multiple intermediate stator vanes 679a and multiple intermediate stator vanes 679b, which are arranged in an arrangement in which two different inclination directions are alternately arranged in the circumferential direction ef. Therefore, a pressure difference occurs between the upstream and downstream of the air flow in each of the air passages 677x, 677y. By providing the ventilation openings 633, 634 at the upper and lower ends of the air passages 677x, 677y where the pressure difference is large, cooling air is forcibly taken into or discharged from the rotor 203 through the ventilation openings 633, 634.

[0118] Therefore, in the rotating device 601 according to this embodiment, a larger amount of cooling air can be forcibly sent into the rotor 203, and the stage having the heating coil can be cooled. This allows the rotor 2 to be cooled efficiently. In addition, in this embodiment, the same configuration as in the first, second, third, or fifth embodiment operates in the same manner and provides the same effects.

[0119] Although the rotating device of the present invention has been described above with reference to preferred embodiments, the rotating device of the present invention is not limited to the configurations of the above embodiments. For example, configurations specific to each embodiment may be combined. For example, the configuration specific to the first embodiment (such as the configuration in which a preload is applied to the inner peripheral ring 41b of the first bearing 41 by the disc spring 91) may be applied to the second to sixth embodiments.

[0120] Furthermore, the intermediate stator vane 579 and intermediate stator vanes 679a and 679b that are specific to the fifth and sixth embodiments described using examples in which a pair of upper and lower rotor blades 306a and 306b are provided may be applied to the fourth embodiment (together with the housing 507 and the housing 607). In the fourth embodiment, the upper rotor blade 406 and the lower balance ring 409 form a pair, and between the rotor blade 406 and the balance ring 409 there is a space 477 in which the intermediate stator vane 579 and intermediate stator vanes 679 and 679b can be provided.

[0121] The air may also be a gas such as a refrigerant. In addition, those skilled in the art can appropriately modify the rotating device of the present invention in accordance with conventionally known knowledge. As long as such modifications still include the configuration of the present invention, they are of course included in the scope of the present invention. [Explanation of symbols]

[0122] 1...rotating device, 2...stator, 3...rotor (rotating body), 4...bearing, 5...shaft member, 6...moving blade, 7...housing, 8...stationary blade, 21...stator core, 22...coil, 23...magnetic pole portion, 24...annular portion, 31...magnet, 32...cylindrical member, 41...first bearing (bearing), 41a, 42a...outer ring, 41b, 42b...inner ring, 41c, 42c...bearing ball, 42...second bearing (bearing), 71...lid body, 71a...lid spoke portion, 71b... cylindrical cover portion, 71ba... protrusion, 71bb... notch, 71c... disk portion, 71d... rib, 72... cylindrical housing portion, 72a... protrusion, 72b... notch, 74... lower support portion, 74a... outer cylindrical portion, 74b... bottom portion, 74c... inner cylindrical portion, 77... space, 78... housing main body portion, 91... disc spring, 92... fixing member, 201... rotating device 201, 203... rotor, 206... moving blade, 207... housing, 207a... upper housing 207b...lower housing, 232...tubular member, 233...suction port, 234...discharge port, 261...tubular portion, 262...blade, 275...upper end opening, 276...lower end opening, 277...space, 301...rotating device 201, 303...rotor, 306a, 306b...moving blades, 361a, 361b...tubular portion, 362a, 362b...blade, 377...space, 401...rotating device, 403...rotor, 406...moving blade, 409...balance ring (Ring member), 461...cylindrical portion, 462...blade, 501...rotating device, 507...housing, 507a...upper housing, 507b...middle housing, 507c...lower housing, 577...space, 579...intermediate stator blade (stationary blade), 601...rotating device, 607...housing, 607b...middle housing, 633...vent, 634...vent, 677...space, 677x, 677y...air passage, 679a, 679b...intermediate stator blade (stationary blade).

Claims

1. A motor section having a first bearing and a second bearing arranged in the direction of a rotation axis; a housing surrounding an outer peripheral surface of the motor unit; an air passage formed between an outer peripheral surface of the motor unit and the housing; a rotor blade provided in the motor unit; a stator blade provided in the housing, the housing includes an opening on the first bearing side and an opening on the second bearing side, Air is taken in through the opening on the first bearing side and blown out through the opening on the second bearing side, the rotor blade in a region overlapping with the first bearing and the stator blade on the second bearing side with respect to the rotor blade are arranged side by side in the rotation axis direction, In the rotation axis direction, the stator vane includes a first end portion on the first bearing side and a second end portion on the second bearing side, a rotating device, wherein an inner peripheral surface of the second end portion on the second bearing side is spaced apart from an outer peripheral surface of the motor portion in the radial direction.

2. A motor section having a first bearing and a second bearing arranged in the direction of a rotation axis; a housing surrounding an outer peripheral surface of the motor unit; an air passage formed between an outer peripheral surface of the motor unit and the housing; a rotor blade provided in the motor unit; a stator blade provided in the housing, the housing includes an opening on the first bearing side and an opening on the second bearing side, Air is taken in through the opening on the first bearing side and blown out through the opening on the second bearing side, the rotor blade in a region overlapping with the first bearing and the stator blade on the second bearing side with respect to the rotor blade are arranged side by side in the rotation axis direction, In the rotation axis direction, the stator vane includes a first end portion on the first bearing side and a second end portion on the second bearing side, A rotating device, wherein an inner circumferential surface of the first end portion on the first bearing side is spaced apart from an outer circumferential surface of the motor portion in the radial direction.

3. a motor section having a first bearing and a second bearing arranged in a rotation axis direction; a housing surrounding an outer peripheral surface of the motor unit; an air passage formed between an outer peripheral surface of the motor unit and the housing; a rotor blade provided in the motor unit; a stator blade provided in the housing, the housing includes an opening on the first bearing side and an opening on the second bearing side, Air is taken in through the opening on the first bearing side and blown out through the opening on the second bearing side, the rotor blade on the first bearing side and the stator blade on the second bearing side with respect to the rotor blade are arranged side by side in the rotation axis direction, In the rotation axis direction, the stator vane includes a first end portion on the first bearing side and a second end portion on the second bearing side, an inner circumferential surface of the first end portion on the first bearing side is spaced apart from an outer circumferential surface of the motor portion in a radial direction; a rotating device, wherein an inner peripheral surface of the second end portion on the second bearing side is spaced apart from an outer peripheral surface of the motor portion in the radial direction.

4. The rotating device according to claim 1 , wherein the motor unit includes a magnet and a stator located between the first bearing and the second bearing in the direction of the rotation axis.

5. the motor section includes a spacer; The rotating device according to claim 1 , wherein the spacer positions the second bearing in the direction of the rotation axis.

Images