JP2019071763A - Rotor, rotary electric machine, and method for manufacturing coated tube - Google Patents

Abstract

To provide a rotor capable of suppressing a decrease in strength of a coated tube and peeling of an end face.SOLUTION: The rotor includes: a rotary member; a plurality of permanent magnets disposed on an outer peripheral side of the rotary member; and a coated tube 33, provided on an outer peripheral surface side of the plurality of permanent magnets, formed of a tape-like fiber bundle 133 in which a plurality of thread-like fibers arranged in one direction are bundled flatly by a resin. The coated tube 33 has the tape-like fiber bundle 133 spirally wound along a circumferential direction and formed to align along an axial direction. An end face of a winding start and an end face of a winding end of the tape-like fiber bundle 133 are directed in the axial direction of the coated tube 33.SELECTED DRAWING: Figure 3A

Description

  The present invention relates to a rotor, a rotating electrical machine including the rotor, and a method of manufacturing a sheath.

  As a type of rotating electrical machine using a permanent magnet for the rotor, there is known an SPM (Surface Permanent Magnet) type electric motor in which permanent magnets are disposed on the outer peripheral side of a rotating member (sleeve, rotating shaft, etc.). In this type of SPM type motor, a covering cylinder is mounted so as to cover the outer periphery of the permanent magnet in order to prevent the permanent magnet from falling off from the rotor due to centrifugal force at high speed rotation where the rotational speed is increased. ing. Fiber-reinforced resin (FRP) is widely used as a material for forming a covering cylinder because it is high in strength and light in weight, and in particular, many carbon fiber-reinforced resins (hereinafter also referred to as "CFRP") are used. It is used.

  Conventionally, as a method of manufacturing a coated cylinder of CFRP, for example, a method (hereinafter, also referred to as “sheet winding”) in which a sheet-like CFRP is wound around a jig serving as a core material to make it cylindrical is known. However, in the case of sheet winding, steps are formed at the beginning and end of the CFRP winding, so that the fibers do not extend straight and meandering occurs in that portion. At the portion where the fiber is meandered, the strength of the covering cylinder is lower than that at the portion where the fiber does not meander, so it is difficult to properly receive the stress when the rotor rotates. Therefore, a method (hereinafter, also referred to as "tape winding") has been proposed in which a tape-shaped CFRP (CFRP fiber bundle described later) is spirally wound along the circumferential direction of the jig to form a cylindrical shape (for example, "tape winding") , Patent Document 1).

JP, 2016-82773, A

  In the tape winding described in Patent Document 1 described above, since there is a step between the winding start and the winding end of the tape-like CFRP, it is conceivable that the strength of that portion is lowered as in the case of the sheet winding. In addition, since the cut surface is exposed in the circumferential direction of the rotor, the end surfaces of the tape-shaped CFRP beginning and end of winding are exposed by wind pressure when the rotor rotates if the adhesive strength of the end surface is not sufficient. Is considered to peel off.

  An object of the present invention is to provide a rotor, a rotating electrical machine, and a method of manufacturing a coated cylinder capable of suppressing the reduction in strength of the coated cylinder and the peeling of the end surface.

(1) The present invention includes a rotating member (for example, a sleeve 31 described later), a plurality of permanent magnets (for example, permanent magnets 32 described later) disposed on the outer peripheral side of the rotating member, and a plurality of permanent magnets A covering cylinder (for example, a coating to be described later) formed by a tape-like fiber bundle (for example, a CFRP fiber bundle 133 to be described later) provided on the outer peripheral surface side and in which plural thread fibers arranged in one direction A cylinder 33), and in the covering cylinder, the tape-like fiber bundle spirally circulates along a circumferential direction (for example, a circumferential direction DR described later) and an axial direction (for example, a rotation described later) The tape-like fiber bundle is formed so as to be arranged along the axis S), and the end face of the tape-like fiber bundle at the beginning of the winding and the end face of the winding end face in the axial direction of the covering cylinder. There is a rotor ( Eg to about rotor 30) to be described later.

(2) In the rotor of (1), the tape-like fiber bundles of the covering cylinder may be arranged at intervals so as not to overlap in the axial direction.

(3) In the rotor according to (1) or (2), the covering tube is formed by continuously winding the tape-like fiber bundle spirally from one end to the other end in the axial direction The first layer and the second layer, wherein the tape-like fiber bundle is continuously and spirally wound from the other end in the axial direction to the one end; The second layers may be alternately stacked in the radial direction of the covering cylinder.

(4) In the rotor of (3), the covering cylinder is an angle at which the tape-like fiber bundle forming the first layer and the tape-like fiber bundle forming the second layer intersect with the axial direction (For example, angles θ1 and θ2 described later) may be different from each other.

(5) In the rotor according to (3) or (4), the covering cylinder has a width of the tape-like fiber bundle forming the first layer and a width of the tape-like fiber bundle forming the second layer ( For example, widths W1 and W2) described later may be different from each other.

(6) In the rotor according to any one of (3) to (5), the covering tube is the tape-like fiber bundle forming the first layer and the tape-like fiber forming the second layer The thickness of the bundle (for example, the thicknesses T1 and T2 described later) may be different from each other.

(7) A rotating electric machine (for example, described later) including: a rotor according to any one of (1) to (6); and a stator (for example, a stator 20 described later) provided on the outer peripheral side of the rotor The motor 1).

(8) The present invention is a method of manufacturing a covering cylinder provided on the outer peripheral surface of a rotor having a plurality of permanent magnets arranged on the outer peripheral side, and a fiber bundle in which a plurality of thread-like fiber reinforced resins are bundled flat. Are spirally wound along the circumferential direction of the rotating member or cylindrical jig (for example, the jig 50 described later), and the tape-like fiber bundle is aligned along the axial direction of the rotating member or cylindrical jig When the tape-like fiber bundle is wound, an end surface (for example, an end surface 133s of winding start described later) and an end surface (for example, an end surface 133e of winding end described below) of the winding end are in the axial direction of the covering cylinder. A step of obliquely cutting the end face of winding start and end face of winding end of said tape-like fiber bundle, and spiraling said tape-like fiber bundle along the circumferential direction of said rotating member or said cylindrical jig Wrapped around the tape Arranging the fiber bundle along the axial direction of the rotating member or the cylindrical jig to orient the end surface of the winding start and the end surface of the winding end of the tape-like fiber bundle in the axial direction of the covering cylinder; The present invention relates to a method of manufacturing a coated cylinder comprising:

(9) The present invention is a method of manufacturing a covering cylinder provided on the outer peripheral surface of a rotor having a plurality of permanent magnets arranged on the outer peripheral side, and a fiber bundle in which a plurality of threadlike fiber reinforced resins are bundled flat. Are spirally wound along the circumferential direction of the rotating member or the cylindrical jig, and the tape-like fiber bundle is arranged along the axial direction of the rotating member or the cylindrical jig, and the rotating member or the cylinder Cutting the winding start end and the winding end of the tape-like fiber bundle wound around a jig in a direction orthogonal to the axial direction of the rotating member or the cylindrical jig The manufacturing method of

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of the rotor which can suppress the fall of the intensity | strength of a covering cylinder, and peeling of the end surface, a rotary electric machine, and a covering cylinder can be provided.

It is sectional drawing which shows the structure of the electric motor 1 in 1st Embodiment. 5 is an exploded perspective view of a rotor 30. FIG. It is a conceptual diagram which shows the process of manufacturing the covering cylinder 33 of 1st Embodiment. It is a conceptual diagram which shows the process of manufacturing the covering cylinder 33 of 1st Embodiment. It is a conceptual diagram which shows the process of manufacturing coated cylinder 33A of a 2nd embodiment. It is a conceptual diagram which shows the process of manufacturing coated cylinder 33A of a 2nd embodiment. It is a conceptual diagram which shows the process of manufacturing coated cylinder 33A of a 2nd embodiment. It is a conceptual diagram which shows the 1st structure of covering cylinder 33B in 3rd Embodiment. It is a conceptual diagram which shows the 2nd structure of covering cylinder 33B in 3rd Embodiment. It is a conceptual diagram which shows the structure of covering cylinder 33C in 4th Embodiment. It is a conceptual diagram which shows the 1st structure of covering cylinder 33D in 5th Embodiment. It is a conceptual diagram which shows the 2nd structure of covering cylinder 33D in 5th Embodiment. It is a conceptual diagram which shows the 3rd structure of covering cylinder 33D in 5th Embodiment.

  Hereinafter, embodiments of the present invention will be described. The drawings attached to the present specification are all schematic views, and in consideration of ease of understanding and the like, shapes, scales, dimensional ratios of longitudinal and lateral dimensions, and the like of the respective parts are changed or exaggerated from the real thing. Further, in the drawings, hatching indicating a cross section of a member is appropriately omitted.

In the present specification and the like, terms that specify shape, geometric condition, these degrees, such as “parallel”, “direction”, etc., may be regarded as almost parallel in addition to the exact meaning of the terms. And the range that can be regarded as the direction.
In the present specification and the like, a line serving as a rotation center of the rotation shaft 35 described later is referred to as “rotation axis S”, and a direction along the rotation axis S is also referred to as “axial direction”. The definitions of "rotational axis S" and "axial direction" are not limited to the rotational shaft 35, but also apply to the iron core 21, rotor 30, sleeve 31, permanent magnet 32, coated cylinder 33, jig 50, etc. Ru.
In the present specification and the like, a tape-like fiber bundle in which a plurality of thread-like carbon fibers (CFs) aligned in one direction are flatly bundled by a resin is referred to as "CFRP fiber bundle". The carbon fiber of) is also referred to as "filamentary CFRP". Moreover, the carbon fiber contained in a CFRP fiber bundle or thread CFRP is also only called "fiber."

First Embodiment
First, an electric motor 1 as a rotating electric machine including the rotor 30 of the first embodiment will be described.
FIG. 1 is a cross-sectional view showing the configuration of the motor 1 in the first embodiment. In addition, the structure of the electric motor 1 shown in FIG. 1 is an example, and as long as the rotor 30 of embodiment is applicable, what kind of structure may be sufficient.

As shown in FIG. 1, the electric motor 1 includes a frame 10, a stator 20, a rotor 30, a rotation shaft 35, and a bearing 13 as main constituent requirements.
The frame 10 is an exterior member of the motor 1 and includes a frame body 11 and an axial hole 12.

  The frame body 11 is a housing that encloses and holds the stator 20. The frame body 11 holds the rotor 30 via the bearing 13. The frame body 11 is provided with a supply port 14, a discharge port 15 and a hole 16. The supply port 14 is an opening for supplying the refrigerant to the flow path 23 of the stator frame 22 and is connected to a refrigerant supply pipe (not shown). The discharge port 15 is an opening for discharging the refrigerant flowing through the flow path 23, and is connected to a discharge pipe (not shown) of the refrigerant. The hole 16 is an opening for allowing the power line 27 drawn from the stator 20 to pass therethrough. The shaft hole 12 is a hole through which a rotation shaft 35 (described later) passes.

  The stator 20 is a composite member that forms a rotating magnetic field for rotating the rotor 30. The stator 20 is formed in a cylindrical shape as a whole and is fixed to the inside of the frame 10. The stator 20 includes an iron core 21 and a stator frame 22.

  The iron core 21 is a member on which the winding 26 can be arranged. The iron core 21 is formed in a cylindrical shape and disposed inside the stator frame 22. The iron core 21 has a plurality of grooves (not shown) formed on the inner side, and the windings 26 are disposed in the grooves. A part of the winding 26 protrudes from both ends of the iron core 21 in the axial direction of the iron core 21. The iron core 21 is manufactured, for example, by stacking a plurality of thin plates such as electromagnetic steel plates to form a laminate, and integrating the laminate by bonding, caulking, or the like.

  The stator frame 22 is a member for holding the iron core 21 inside thereof. The stator frame 22 is formed in a cylindrical shape, and is disposed outside the stator 20. The iron core 21 is rigidly joined to the stator frame 22 in order to receive the reaction force generated by the torque of the rotor 30. As shown in FIG. 1, the stator frame 22 of the present embodiment is provided with a flow path 23 for cooling the heat transmitted from the iron core 21 on the outer side surface. The flow path 23 is a single or multiple spiral groove formed on the outer surface of the stator frame 22. The refrigerant (not shown) supplied from the supply port 14 of the frame main body 11 (frame 10) flows in the flow path 23 along the spiral shape of the outer surface of the stator frame 22, and then the discharge of the frame main body 11 occurs. It is discharged from the outlet 15 to the outside.

  A power wire 27 electrically connected to the winding 26 is drawn out from the iron core 21 of the stator 20. The power line 27 is connected to a power supply device installed outside the motor 1 (not shown). During operation of the motor 1, for example, a three-phase alternating current is supplied to the iron core 21 to form a rotating magnetic field for rotating the rotor 30.

  The rotor 30 is a component that rotates by magnetic interaction with the rotating magnetic field formed by the stator 20. The rotor 30 is provided on the inner circumferential side of the stator 20. The configuration of the rotor 30 will be described later.

  The rotation shaft 35 is a member that supports the rotor 30. The rotation shaft 35 is inserted so as to penetrate the axial center of the rotor 30 and is fixed to the rotor 30. A pair of bearings 13 is fitted to the rotating shaft 35. The bearing 13 is a member that rotatably supports the rotation shaft 35, and is provided on the frame main body 11. The rotation shaft 35 is rotatably supported by the frame body 11 and the bearing 13 about the rotation axis S. The rotation shaft 35 passes through the shaft hole 12 and is connected to, for example, a cutting tool, a power transmission mechanism installed outside, a reduction mechanism, etc. (all not shown).

  In the electric motor 1 shown in FIG. 1, when a three-phase alternating current is supplied to the stator 20 (iron core 21), the rotor 30 is generated by the magnetic interaction between the stator 20 and the rotor 30 in which the rotating magnetic field is formed. Torque is generated, and the torque is output to the outside through the rotation shaft 35. In the present embodiment, the motor 1 is described as the SPM synchronous motor described above, but the motor 1 may be, for example, an IPM (Interior Permanent Magnet) synchronous motor.

Next, the configuration of the rotor 30 will be described.
FIG. 2 is an exploded perspective view of the rotor 30. As shown in FIG. As shown in FIG. 2, the rotor 30 includes a sleeve (rotating member) 31, a permanent magnet 32, and a covering cylinder 33.
The sleeve 31 is a substantially cylindrical member to which the plurality of permanent magnets 32 is attached, and is provided between the rotating shaft 35 (see FIG. 1) and the plurality of permanent magnets 32. The plurality of permanent magnets 32 are disposed along the circumferential direction DR of the sleeve 31. The sleeve 31 is formed of, for example, a magnetic material such as carbon steel. The rotor 30 having the sleeve 31 on the inner peripheral side is fitted to the outer periphery of the rotary shaft 35 by interference fit. In the present specification and the like, the arrow in the circumferential direction DR shown in FIG. 2 is applied not only to the sleeve 31 but also to the permanent magnet 32 and the covering cylinder 33.

  The permanent magnet 32 is a member that generates a magnetic field, and as shown in FIG. 2, eight rows are provided along the circumferential direction DR on the outer peripheral side of the sleeve 31 (in FIG. 2, only four rows on the near side) Is shown). In the eight rows of permanent magnets 32, permanent magnets 32 for the N pole and permanent magnets 32 for the S pole are alternately arranged in the circumferential direction DR of the sleeve 31. The permanent magnet 32 is attached to the outer peripheral surface of the sleeve 31 via an adhesive layer 34. In the present embodiment, an example is shown in which the permanent magnets 32 in each row are divided into two along the axial direction of the rotor 30, but the present invention is not limited thereto. It may be divided into two or more, or may not be divided.

  The covering cylinder 33 is a cylindrical member for covering the plurality of permanent magnets 32. The covering cylinder 33 is mounted on the outer peripheral surface of the permanent magnet 32 disposed on the sleeve 31. By mounting the covering cylinder 33 on the outer peripheral surface of the permanent magnet 32, it is possible to suppress the permanent magnet 32 from coming off the rotor 30 due to the centrifugal force generated by the rotation of the rotor 30.

  The covering cylinder 33 is formed by winding a tape-like CFRP fiber bundle while applying tension to a cylindrical jig as described later. As a raw material fiber which becomes the origin of a CFRP fiber bundle, although carbon fiber is preferable, for example, materials having high specific strength such as glass fiber, aramid fiber, silicon carbide fiber, boron fiber, titanium alloy fiber, etc. It can be used.

  In order to mount the covering cylinder 33 on the rotor 30, for example, the covering cylinder provided on the outer peripheral side of the sleeve may be provided outside by inserting a sleeve having the same taper surface on the outer peripheral surface of the rotating shaft having the taper surface. A method (see JP-A-2016-82773, etc.) can be used. By using such a method, the coated cylinder 33 can be mounted on the rotor 30 with a contraction force corresponding to the interference. Thereby, a sufficient reaction force for holding the permanent magnet 32 acts on the coated cylinder 33 radially inward against the centrifugal force generated when the rotor 30 rotates. As described above, in the sheathed cylinder 33, the reaction force acts inward in the radial direction, whereby the permanent magnet 32 is prevented from coming off the rotor 30 by the centrifugal force. The radially inner side is a direction approaching the rotation axis S from the outer side of the rotor 30.

  In addition, as shown in FIG. 2, the outer diameter D2 of the permanent magnet 32 arranged on the sleeve 31 is smaller than the inner diameter D1 of the covering cylinder 33 before the diameter expansion (before mounting) as shown in FIG. It is a dimension of the part (D2-D1) to over. The larger the interference, the more difficult it is to mount the covering cylinder 33 on the outer peripheral surface of the permanent magnet 32, but a larger reaction force can be exerted radially inward from the covering cylinder 33 mounted. .

Next, the configuration of the covering cylinder 33 in the first embodiment will be described.
FIG. 3A and FIG. 3B are conceptual diagrams each showing a process of manufacturing the coated cylinder 33 of the first embodiment.
The covering cylinder 33 of the first embodiment is formed by winding a tape-like CFRP fiber bundle 133 around the outer peripheral surface of a jig (cylindrical jig) 50, as shown in FIG. 3A. Specifically, the CFRP fiber bundles 133 are spirally wound along the circumferential direction DR (see FIG. 2) of the jig 50 and are arranged along the axial direction of the jig 50. After the CFRP fiber bundle 133 is wound around the jig 50 and the impregnated resin is cured, the jig 50 is removed to complete the coated cylinder 33.

  The arrangement direction of the thread-like CFRPs 133a constituting the CFRP fiber bundle 133 is parallel to the longitudinal direction of the CFRP fiber bundle 133 (the same applies to the other embodiments). Further, the angle θ at which the longitudinal direction of the CFRP fiber bundle 133 intersects a line orthogonal to the rotation axis S of the jig 50 is in the range of 0 ° <θ <90 °.

  In the present embodiment, the length and width of the CFRP fiber bundle 133 in the longitudinal direction are set in accordance with the length of the covering cylinder 33 in the axial direction, the number of turns of the CFRP fiber bundle 133, and the like. Further, the CFRP fiber bundle 133 is wound so that the side surfaces do not overlap along the axial direction of the covering cylinder 33 and no gap is formed (common to the second to fourth embodiments described later).

  In the present embodiment, an end surface 133 s of the start of winding and an end surface 133 e of the end of winding (hereinafter collectively referred to as “both end surfaces”) are formed at the winding start and winding end portions of the CFRP fiber bundle 133. Both end surfaces of the CFRP fiber bundle 133 are cut surfaces formed obliquely to the longitudinal direction of the CFRP fiber bundle 133 so as to be orthogonal to the rotation axis S when the CFRP fiber bundle 133 is wound around the jig 50. It is. In FIG. 3A, the contour of the CFRP fiber bundle 133 before cutting is shown by a two-dot chain line at the end of the winding.

  In the covering cylinder 33 of the present embodiment, the CFRP fiber bundle 133 has an end surface 133s at the beginning of winding and an end surface 133e at the end of winding formed in advance at the winding start and end portions, respectively. Therefore, as shown in FIG. 3B, when the CFRP fiber bundle 133 is wound around the jig 50, the coating cylinder 33 has the CFRP fiber bundle 133 orbiting along the circumferential direction DR (see FIG. 2) and the axial direction , And the CFRP fiber bundle 133 is formed to align. Then, in the covering cylinder 33, both end surfaces (133s, 133e) of the CFRP fiber bundle 133 are in the state of being oriented in the axial direction. The manufacturing method of the covering cylinder 33 in this embodiment is applicable also to 3rd-5th embodiment mentioned later.

  In the covering cylinder 33 of the first embodiment described above, since both end surfaces of the CFRP fiber bundle 133 are directed in the axial direction of the covering cylinder 33, the steps at the winding start and winding end portions of the tape-like CFRP fiber bundle 133 Does not occur. According to this, since the fibers do not extend straight and meandering does not occur at the winding start and winding end portions of the CFRP fiber bundle 133, it is possible to suppress the decrease in the strength of the covering cylinder 33. Therefore, stress when the rotor 30 rotates can be properly received. Further, in the covering cylinder 33 of the first embodiment, the cut surfaces of the both end surfaces of the CFRP fiber bundle 133 are not exposed in the circumferential direction DR of the rotor 30. Therefore, even if the adhesive strength of the end face is not sufficient, it is possible to suppress the end face from being separated by the wind pressure when the rotor 30 rotates.

Second Embodiment
Next, the configuration of the covering cylinder 33A of the second embodiment will be described.
The second embodiment is different from the first embodiment in the method of manufacturing the covering cylinder 33A. The other configuration of the covering cylinder 33A of the second embodiment is the same as that of the first embodiment. Therefore, in FIGS. 4A to 4C, the illustration of the rotor 30 (see FIG. 2) to which the covering cylinder 33A is applied is omitted. Further, in the description and the drawings of the second embodiment, the members equivalent to the first embodiment are denoted by the same reference numerals as the first embodiment, and the redundant description will be omitted.

FIG. 4A, FIG. 4B and FIG. 4C are conceptual diagrams each showing a process of manufacturing the covering cylinder 33A of the second embodiment.
As shown in FIG. 4A, the covering cylinder 33A of the second embodiment is formed by winding around the outer peripheral surface of the jig 50 a CFRP fiber bundle 133 whose cutting start and end surfaces are not cut. The CFRP fiber bundle 133 is wound while applying tension to the outer peripheral surface of the jig 50.

  After winding the CFRP fiber bundle 133 around the jig 50, as shown in FIG. 4B, the winding start and winding end portions of the CFRP fiber bundle 133 are cut along the cut line CL before the resin is cured. The cut line CL is a virtual line set in a direction orthogonal to the rotation axis S. When the winding start and winding end portions of the CFRP fiber bundle 133 are cut along the cut line CL, as shown in FIG. 4C, an end surface 133s of the winding start is formed at the winding start portion of the CFRP fiber bundle 133. The end of winding of the fiber bundle 133 is formed with an end face 133e of the end of winding. These end faces are cut surfaces formed obliquely with respect to the longitudinal direction of the CFRP fiber bundle 133 as shown in FIG. 4B, and in the covering cylinder 33A, as shown in FIG. It is a plane orthogonal to

  In the covering cylinder 33A of the present embodiment, after the CFRP fiber bundle 133 is wound around the jig 50, the end surface 133s of the start of winding and the end surface 133e of the end of winding are formed at the winding start and winding end portions, respectively. Therefore, as shown in FIG. 4C, the covering cylinder 33A is formed such that the CFRP fiber bundles 133 circulate along the circumferential direction and the CFRP fiber bundles 133 align along the axial direction. Then, in the covering cylinder 33A, both end surfaces (133s, 133e) of the CFRP fiber bundle 133 are surfaces orthogonal to the rotation axis S, and are in the state of being oriented in the axial direction. The manufacturing method of the covering cylinder 33 in this embodiment is applicable also to 3rd-5th embodiment mentioned later.

  Also in the covering cylinder 33A of the second embodiment described above, both end surfaces of the CFRP fiber bundle 133 are axially directed, and the cut surface is not exposed in the circumferential direction DR of the rotor 30 (see FIG. 2). Therefore, as in the first embodiment, the decrease in the strength of the covering cylinder 33A and the peeling of the end face of the CFRP fiber bundle 133 can be suppressed.

  Moreover, in the covering cylinder 33A of the second embodiment, the CFRP fiber bundle 133 is cut in a state in which the winding start portion is left. Therefore, it is possible to wind the CFRP fiber bundle 133 around the jig 50 while applying a larger tension by fixing an extra portion of the winding start with an instrument or the like before starting the CFRP fiber bundle 133 with the jig. . According to this, in the CFRP fiber bundle 133, more fibers are wound around the jig 50 in a state of being stretched straight. Therefore, in the covering cylinder 33A, since it becomes possible to receive stress with more fibers, the strength of the covering cylinder 33A can be further improved.

Third Embodiment
Next, the covering cylinder 33B of the third embodiment will be described.
The coated cylinder 33B of the third embodiment is different from the first embodiment in that it has a two-layer structure. The other configuration of the covering cylinder 33B of the third embodiment is the same as that of the first embodiment. Therefore, in FIGS. 5A and 5B, the illustration of the rotor 30 to which the coated cylinder 33B is applied is omitted. Further, in the description and the drawings of the third embodiment, the members equivalent to the first embodiment are denoted by the same reference numerals as the first embodiment, and the redundant description will be omitted.

FIG. 5A is a conceptual view showing a first configuration of the covering cylinder 33B in the third embodiment.
As shown in FIG. 5A, in the covering cylinder 33B of the first configuration, the first CFRP fiber bundle 133 is spirally wound along the circumferential direction of the jig 50, and the second CFRP fiber bundle 134 is formed on the upper layer thereof. Are spirally wound in the same direction as the first CFRP fiber bundle 133. In the covering cylinder 33B of the first configuration, for example, the first CFRP fiber bundle 133 and the second CFRP fiber bundle 134 are not shown in the winding start and winding end portions, but for example, the first embodiment (FIG. An end face 133s of the beginning of winding and an end face 133e of the end of winding as shown in 3B) are formed (the same applies to the second configuration described later).

  As shown in FIG. 5A, on the outer peripheral surface of the jig 50, the first CFRP fiber bundle 133 continuously spirals continuously from one end to the other end in the axial direction of the covering cylinder 33B. There is. The first CFRP fiber bundle 133 forms a first layer on the outer peripheral surface of the jig 50. The second CFRP fiber bundle 134 spirals continuously from the one end in the axial direction of the covering cylinder 33B to the other end on the outer peripheral surface of the first CFRP fiber bundle 133. The second CFRP fiber bundle 134 forms a second layer on the outer peripheral surface of the first layer (first CFRP fiber bundle 133).

  In the covering cylinder 33 B of the first configuration, the angle θ 2 at which the longitudinal direction of the second CFRP fiber bundle 134 intersects the rotation axis S of the jig 50 is the longitudinal direction of the first CFRP fiber bundle 133 is the jig 50. It is set to be larger than an angle θ1 intersecting the rotation axis S (θ2> θ1). For example, when the angle θ1 of the first CFRP fiber bundle 133 is 85 °, the angle θ2 of the second CFRP fiber bundle 134 is set to 87 °.

According to the covering cylinder 33B of the first configuration, since the angle θ1 of the first CFRP fiber bundle 133 and the angle θ2 of the second CFRP fiber bundle 134 are different, when the angle θ1 and the angle θ2 are the same. In comparison, the angular range over which stress is received by the fibers can be wider. According to this, the strength in the circumferential direction and the axial direction of the covering cylinder 33B can be further enhanced. In particular, when the strength in the axial direction of the covering cylinder 33B is increased, the strength in the axial direction when the covering cylinder 33B is mounted on the rotor 30 can be secured. Moreover, after mounting | wearing the coating | coated cylinder 33B to the rotor 30, drop-off | omission from the rotor 30 of the permanent magnet 32 can be suppressed more effectively.
In the configuration of the present embodiment, the angle θ1 of the first CFRP fiber bundle 133 may be set to be larger than the angle θ2 of the second CFRP fiber bundle 134 (θ1> θ2).

FIG. 5B is a conceptual view showing a second configuration of the covering cylinder 33B in the third embodiment.
As shown in FIG. 5B, in the covering cylinder 33B of the second configuration, the first CFRP fiber bundle 133 is spirally wound along the circumferential direction of the jig 50, and the second CFRP fiber bundle 134 is formed on the upper layer thereof. Are spirally wound in a direction opposite to that of the first CFRP fiber bundle 133.

  In the covering cylinder 33B of the second configuration, the angle θ1 at which the longitudinal direction of the first CFRP fiber bundle 133 intersects the rotation axis S of the jig 50 is the same as that of the second CFRP fiber bundle 134 in the longitudinal direction. It is set to have the same angle (θ1 = θ2) as the angle θ2 intersecting the rotation axis S.

  According to the covering cylinder 33B of the second configuration, since the second CFRP fiber bundle 134 is wound on the upper layer of the first CFRP fiber bundle 133 in the direction opposite to the CFRP fiber bundle 133, the first The fibers of the CFRP fiber bundle 133 and the fibers of the second CFRP fiber bundle 134 do not enter each other. According to this, since the fibers contained in the fiber bundle of each layer can be wound around the jig 50 in a more stretched state, the fibers can receive a larger force. Therefore, also in the covering cylinder 33B of a 2nd structure, the intensity | strength of the circumferential direction and an axial direction can be raised more. In particular, when the strength in the axial direction of the covering cylinder 33B is increased, the strength in the axial direction when the covering cylinder 33B is mounted on the rotor 30 can be secured. Moreover, after mounting | wearing the coating | coated cylinder 33B to the rotor 30, drop-off | omission from the rotor 30 of the permanent magnet 32 can be suppressed more effectively.

  In the covering cylinder 33B of the second configuration, the angle θ1 of the first CFRP fiber bundle 133 may be set to be larger than the angle θ2 of the second CFRP fiber bundle 134 (θ1> θ2). The angle θ2 of the second CFRP fiber bundle 134 may be set to be larger than the angle θ1 of the first CFRP fiber bundle 133 (θ2> θ1).

Fourth Embodiment
Next, a covering cylinder 33C of the fourth embodiment will be described.
The covering cylinder 33C of the fourth embodiment has a two-layer structure, and is different from the first embodiment in that the width and thickness of the CFRP fiber bundle differ from layer to layer. The other configuration of the covering cylinder 33C of the fourth embodiment is the same as that of the first embodiment. Therefore, in FIG. 6, illustration of the rotor 30 to which the covering cylinder 33C is applied is omitted. Further, in the description and the drawings of the fourth embodiment, the members equivalent to the first embodiment are denoted by the same reference numerals as the first embodiment, and the redundant description will be omitted.

FIG. 6 is a conceptual view showing a configuration of a covering cylinder 33C in the fourth embodiment.
As shown in FIG. 6, in the covering cylinder 33C of the fourth embodiment, the first CFRP fiber bundle 133 is spirally wound along the circumferential direction of the jig 50, and the second CFRP fiber bundle 134 is formed on the upper layer thereof. Are spirally wound in the same direction as the first CFRP fiber bundle 133. In the covering cylinder 33C of the fourth embodiment, the first CFRP fiber bundle 133 and the second CFRP fiber bundle 134 do not show in the winding start and winding end portions, for example, the first embodiment (figure An end face 133s of the beginning of winding and an end face 133e of the end of winding are formed as shown in 3B).

  As shown in FIG. 6, on the outer peripheral surface of the jig 50, the first CFRP fiber bundle 133 continuously spirals continuously from one end to the other end in the axial direction of the covering cylinder 33C. There is. The first CFRP fiber bundle 133 forms a first layer on the outer peripheral surface of the jig 50. The second CFRP fiber bundle 134 spirals continuously from the one end in the axial direction of the covering cylinder 33C to the other end on the outer peripheral surface of the first CFRP fiber bundle 133. The second CFRP fiber bundle 134 forms a second layer on the outer peripheral surface of the first layer (first CFRP fiber bundle 133).

  The covering cylinder 33C of the fourth embodiment is set such that the width W2 of the second CFRP fiber bundle 134 is wider than the width W1 of the first CFRP fiber bundle 133 (W2> W1). For example, if the width W1 of the first CFRP fiber bundle 133 is 4 mm, the width W2 of the second CFRP fiber bundle 134 is set to 6 mm.

  Further, the covering cylinder 33C of the fourth embodiment is set such that the thickness T2 of the second CFRP fiber bundle 134 is thicker than the thickness T1 of the first CFRP fiber bundle 133 (T2> T1). There is. For example, if the thickness T1 of the first CFRP fiber bundle 133 is 0.1 mm, the thickness T2 of the second CFRP fiber bundle 134 is set to 0.12 mm. The fiber bundle can be set to an arbitrary thickness by appropriately combining the fiber diameter and the number of fibers. For example, even if the number of fibers is the same, the fiber bundle can be thickened by increasing the fiber diameter, and even if the fiber diameter is the same, the fiber bundle can be thickened by increasing the number of fibers.

In the covering cylinder 33C of the fourth embodiment, since the first CFRP fiber bundle 133 and the second CFRP fiber bundle 134 have different widths and thicknesses, the width and thickness of the two-layered CFRP fiber bundle are the same. The strength of the covering cylinder 33C can be further optimized as compared with the case of the dimension.
In the configuration of the present embodiment, the width W1 of the first CFRP fiber bundle 133 may be set to be wider than the width W2 of the second CFRP fiber bundle 134 (W1> W2). Further, the thickness T1 of the first CFRP fiber bundle 133 may be set to be thicker than the thickness T2 of the second CFRP fiber bundle 134 (T1> T2).

Fifth Embodiment
Next, a covering cylinder 33D of the fifth embodiment will be described.
The coated cylinder 33D of the fifth embodiment is different from the first embodiment in that the side surfaces of the CFRP fiber bundle are arranged so as to overlap along the axial direction, or are arranged at intervals. The other configuration of the covering cylinder 33D of the fifth embodiment is the same as that of the first embodiment. Therefore, in FIGS. 7A to 7C, illustration of the rotor 30 to which the coated cylinder 33D is applied is omitted. Further, in the description and the drawings of the fifth embodiment, the members equivalent to the first embodiment are denoted by the same reference numerals as the first embodiment, and the redundant description will be omitted.

FIG. 7A is a conceptual view showing a first configuration of a covering cylinder 33D in the fifth embodiment.
As shown in FIG. 7A, in the covering cylinder 33D of the first configuration, the CFRP fiber bundle 133 continuously spirals from one end to the other end in the axial direction of the covering cylinder 33D. In addition, the side surfaces are arranged to overlap each other along the axial direction. A step portion 133 b is formed in a portion where the CFRP fiber bundles 133 overlap. In the covering cylinder 33D of the first configuration, the overlapping width W3 of the CFRP fiber bundles 133 is set, for example, in the range of 0.1 to 1 mm.

  In the covering cylinder 33D of the first configuration, the winding start and winding end portions of the CFRP fiber bundle 133 are not illustrated, but for example, the end surface of the winding start as shown in the first embodiment (see FIG. 3B) An end face 133e is formed at the end of winding and 133s (the same applies to the second and third configurations described later).

  Also in the covering cylinder 33D of the first configuration described above, both end surfaces of the CFRP fiber bundle 133 are axially directed, and the cut surface is not exposed in the circumferential direction DR of the rotor 30 (see FIG. 2). Therefore, as in the first embodiment, the decrease in the strength of the covering cylinder 33D and the peeling of the end face of the CFRP fiber bundle 133 can be suppressed. Further, in the covering cylinder 33D of the first configuration, since the first CFRP fiber bundles 133 are arranged such that the side surfaces overlap each other along the axial direction, the fiber density in the circumferential direction of the covering cylinder 33D It can be enhanced.

FIG. 7B is a conceptual view showing a second configuration of the covering cylinder 33D in the fifth embodiment.
As shown in FIG. 7B, in the covering cylinder 33D of the second configuration, the CFRP fiber bundle 133 continuously spirals from one end to the other end in the axial direction of the covering cylinder 33D. And are arranged at intervals along the axial direction. A gap portion 133c is formed in a portion where the CFRP fiber bundles 133 do not overlap. In the covering cylinder 33D of the second configuration, the width W4 of the gap portion 133c where the CFRP fiber bundles 133 do not overlap is set, for example, in the range of 0.1 to 1 mm.

  Also in the covering cylinder 33D of the second configuration described above, both end surfaces of the CFRP fiber bundle 133 are axially directed, and the cut surface is not exposed in the circumferential direction DR (see FIG. 2) of the rotor 30. Therefore, as in the first embodiment, the decrease in the strength of the covering cylinder 33D and the peeling of the end face of the CFRP fiber bundle 133 can be suppressed.

  Further, in the covering cylinder 33D of the second configuration, the CFRP fiber bundles 133 (hereinafter, also simply referred to as "fiber bundles") are arranged at intervals along the axial direction. According to the second configuration, as in the configuration in which the side surfaces of the fiber bundle overlap each other, the overlapping portions of the fiber bundle do not protrude in a convex shape, so the number of layers increases even when the fiber bundle is wound multiple layers The protruding part does not increase gradually. Therefore, in the second configuration, when winding a fiber bundle in a plurality of layers, more fiber bundles can be wound as compared with a configuration in which the side surfaces of the fiber bundles overlap each other. As a result, when the overlapped fiber bundles are viewed in a radial cross section of the covering cylinder 33D, the number of fibers per unit area (cross sectional area) can be increased. According to this, when the gap between the outer periphery of the rotor 30 (permanent magnet 32) and the inner periphery of the stator 20 is the same, compared with the configuration in which the side surfaces of the fiber bundle overlap with each other, Many fiber bundles can be wound. Therefore, according to the second configuration, the strength of the covering cylinder 33D can be increased.

  Further, according to the second configuration, the overlapping portion of the fiber bundle does not protrude in a convex shape, and the fiber bundle can be wound around a relatively flat surface, so when multiple layers of fiber bundle are wound. The protruding portion of the lower layer fiber bundle hardly causes slack in the upper layer fiber bundle, and the fiber bundle can be stretched and wound in almost any layer. Therefore, according to the second configuration, loosening of the wound fiber bundle can be suppressed. According to the second configuration, even if there is a gap in the lower layer fiber bundle, the upper layer fiber bundle always intersects with the lower layer fiber bundle, so the upper layer fiber bundle is in the lower layer fiber bundle Never get into

FIG. 7C is a conceptual view showing a third configuration of the covering cylinder 33D in the fifth embodiment.
As shown in FIG. 7C, in the covering cylinder 33D of the third configuration, the first CFRP fiber bundle 133 is spirally wound along the circumferential direction of the jig 50, and the second CFRP fiber bundle 134 is formed on the upper layer thereof. Are spirally wound in the same direction as the first CFRP fiber bundle 133.

  In the covering cylinder 33D of the third configuration, the first CFRP fiber bundle 133 continuously and continuously spirals from one end to the other end in the axial direction of the covering cylinder 33D, and in the axial direction The sides are arranged so as to overlap each other. The first CFRP fiber bundle 133 forms a first layer on the outer peripheral surface of the jig 50. The first CFRP fiber bundle 133 circulates at a winding pitch P1. A stepped portion 133 b is formed in a portion where the first CFRP fiber bundles 133 overlap.

  In addition, in the covering cylinder 33D of the third configuration, the second CFRP fiber bundle 134 continuously spirals from one end to the other end in the axial direction of the covering cylinder 33D, and They are arranged at intervals along the axial direction. The second CFRP fiber bundle 134 forms a second layer on the outer peripheral surface of the first layer (first CFRP fiber bundle 133). The second CFRP fiber bundle 134 circulates at a winding pitch P2. A gap portion 133c is formed in a portion where the second CFRP fiber bundles 134 do not overlap.

  In the third configuration, the winding pitch P1 of the first CFRP fiber bundle 133 and the winding pitch P2 of the second CFRP fiber bundle 134 are set to be the same (P1 = P2). Therefore, in the covering cylinder 33D of the third configuration, the step portion 133b of the portion where the first CFRP fiber bundles 133 overlap is arranged so as to enter into the gap portion 133c of the second CFRP fiber bundle 134.

  According to the covering cylinder 33D of the third configuration, the step portion 133b formed in the overlapping portion of the first CFRP fiber bundles 133 is arranged so as to enter between the gap portion 133c of the second CFRP fiber bundle 134. Ru. Therefore, the step portion 133b formed on the first CFRP fiber bundle 133 does not protrude to the outer peripheral surface of the covering cylinder 33D. According to this, in order to further increase the density of fibers in the circumferential direction, even when the first CFRP fiber bundles 133 are arranged such that the side surfaces overlap each other along the axial direction, the first CFRP fiber bundles 133 Since the step portion 113b formed on the surface does not protrude to the outer peripheral surface of the covering cylinder 33D, the outer diameter dimension of the covering cylinder 33D can be maintained more uniformly.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to embodiment mentioned above, A various deformation | transformation and change are possible like the modification mentioned later, These are also this invention Fall within the technical scope of Further, the effects described in the embodiments are only listing of the most preferable effects arising from the present invention, and are not limited to those described in the embodiments. In addition, although the above-mentioned embodiment and the below-mentioned modification can be combined suitably, and can also be used, detailed explanation is omitted.

(Modified form)
In the second configuration (see FIG. 7B) of the fifth embodiment, the width W4 of the gap portion 133c may be changed according to the number of turns of the CFRP fiber bundle 133, or a partial in the axial direction of the covering cylinder 33D. May be changed
As in the second configuration of the fifth embodiment, the configuration in which the side surfaces of the CFRP fiber bundle 133 are spaced along the axial direction in the covering cylinder 33D is, for example, the third embodiment (FIG. 5A, FIG. The present invention can also be applied to a two-layered covering cylinder shown in 5B) and the fourth embodiment (see FIG. 6). In that case, in the first layer (the first CFRP fiber bundle 133) and the second layer (the second CFRP fiber bundle 134), the width W4 of the gap portion 133c may be different from each other.
In the sheath having a two-layer structure shown in the third to fifth embodiments, the material of the first CFRP fiber bundle 133 and the second CFRP fiber bundle 134 such as carbon fibers and resin may be changed.

  In the first configuration (FIG. 7A) of the fifth embodiment, the gap portion 133c in which the CFRP fiber bundles 133 do not overlap may be partially formed, or the second configuration (FIG. 7B) of the fifth embodiment. In the above, the step portion 133b in which the CFRP fiber bundles 133 overlap may be partially formed.

  In the embodiment, the sleeve 31 has been described as an example of the rotating member that constitutes the rotor 30, but the present invention is not limited to this. In the configuration in which the permanent magnet 32 is disposed on the outer peripheral side of the rotation shaft 35 without the sleeve 31, the rotation member may be the rotation shaft 35.

  In the embodiment, the example in which the covering cylinder 33 is formed by winding the CFRP fiber bundle 133 around the outer peripheral surface of the jig 50 has been described, but is not limited thereto. The coated cylinder 33 may be formed by directly winding the CFRP fiber bundle 133 around the permanent magnet 32 (see FIG. 2).

  1: Motor, 20: Stator, 30: Rotor, 31: Sleeve, 32: Permanent magnet, 33, 33A, 33B, 33C, 33D: Coated cylinder, 35: Rotating shaft, 50: Jig, 133: CFRP fiber Bundle (tape-like fiber bundle), 133a: filamentary CFRP, 133b: stepped portion, 133c: gap portion, 133s: end face of winding start, 133e: end face of winding end, 134: second CFRP fiber bundle

Claims (9)

A rotating member,
A plurality of permanent magnets disposed on an outer peripheral side of the rotating member;
And a covering cylinder formed of a tape-like fiber bundle provided on the outer peripheral surface side of the plurality of permanent magnets and in which a plurality of thread-like fibers arranged in one direction are flatly bundled with a resin;
The covering tube is formed such that the tape-like fiber bundle is spirally wound along the circumferential direction, and the tape-like fiber bundle is arranged along the axial direction.
The end face of the winding start of the tape-like fiber bundle and the end face of the winding end point in the axial direction of the covering cylinder,
Rotor. In the coated cylinder,
The tape-like fiber bundles are arranged at intervals so as not to overlap in the axial direction.
The rotor according to claim 1. The coated tube is
A first layer in which the tape-like fiber bundle is continuously and helically wound from one end in the axial direction to the other end;
And a second layer in which the tape-like fiber bundle is continuously and helically wound from the other end in the axial direction to one end.
The first layer and the second layer are alternately stacked in the radial direction of the covering cylinder,
The rotor according to claim 1 or 2. In the coated cylinder,
The tape-like fiber bundle forming the first layer and the tape-like fiber bundle forming the second layer have different angles intersecting the axial direction.
The rotor according to claim 3. In the coated cylinder,
The tape-like fiber bundle forming the first layer and the tape-like fiber bundle forming the second layer have different widths, respectively.
The rotor according to claim 3 or 4. In the coated cylinder,
The tape-like fiber bundle forming the first layer and the tape-like fiber bundle forming the second layer have different thicknesses, respectively.
The rotor according to any one of claims 3 to 5. A rotor according to any one of claims 1 to 6;
A stator provided on an outer peripheral side of the rotor;
Electric rotating machine equipped with A manufacturing method of a covering cylinder provided on an outer peripheral surface of a rotor in which a plurality of permanent magnets are arranged on an outer peripheral side,
A tape-like fiber bundle, in which a plurality of thread-like fibers arranged in one direction are bundled flatly by a resin, is spirally wound along the circumferential direction of the rotating member or cylindrical jig, When arranged along the axial direction of the cylindrical jig, the tape-shaped fiber bundle so that the end surface of the winding start and the end surface of the winding end of the tape-shaped fiber bundle are orthogonal to the axial direction of the covering cylinder Obliquely cutting the end face of the winding start and the end face of the winding end;
By spirally winding the tape-like fiber bundle along the circumferential direction of the rotating member or the cylindrical jig, and arranging the tape-like fiber bundle along the axial direction of the rotating member or the cylindrical jig Orienting the end face of the winding start and end face of the winding end of the tape-like fiber bundle in the axial direction of the covering cylinder;
Method of producing a coated cylinder comprising: A manufacturing method of a covering cylinder provided on an outer peripheral surface of a rotor in which a plurality of permanent magnets are arranged on an outer peripheral side,
A tape-like fiber bundle, in which a plurality of thread-like fibers arranged in one direction are bundled flatly by a resin, is spirally wound along the circumferential direction of the rotating member or cylindrical jig, Arranging along the axial direction of the cylindrical jig;
Cutting the winding start end and the winding end of the tape-like fiber bundle wound around the rotating member or the cylindrical jig in a direction perpendicular to the axial direction of the rotating member or the cylindrical jig When,
Method of producing a coated cylinder comprising:

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