JP2012085398A - Rotary electric machine, wind power generation system, and rotation detector for use in rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary electric machine that enables easy replacement of a rotation detection part of a type annularly surrounding a rotary shaft part.SOLUTION: A generator 1 (rotary electric machine) includes: a rotor 20 and a stator 30 having a shaft 10; and a rotary encoder 50 for detecting the rotation of the rotor 20. The rotary encoder 50 includes an annular rotary member 51 mounted on the shaft 10 so as to annularly surround the shaft 10 and using the shaft 10 as a rotary shaft so as to rotate together with the rotor 20, and a sensor part 52 for detecting the rotation of the rotary member 51. The annular rotary member 51 is radially divisibly mounted on the shaft 10.

Description

  The present invention relates to a rotation detector used in a rotating electrical machine, a wind power generation system, and a rotating electrical machine, and more particularly, to a rotating electrical machine having a rotating shaft portion, a wind power generation system, and a rotation detector used in the rotating electrical machine.

  Conventionally, a rotating electrical machine having a rotating shaft portion is known (for example, see Patent Document 1). Patent Document 1 discloses a wind power generator provided with a generator (rotating electric machine) having a rotating shaft portion. In this wind turbine generator, the generator is configured to be connected to various devices such as a gear box via a rotating shaft portion. Here, in the conventional generator as described in the above-mentioned Patent Document 1, in order to monitor the number of rotations of the generator, between the generator on the rotating shaft portion and another device (for example, a gear box). In some cases, a rotary encoder (rotation detection unit) of a type surrounding the rotation shaft portion in an annular shape is attached.

Japanese Patent Laid-Open No. 2005-382091

  However, in the conventional generator as described above, when exchanging the rotary encoder of the type that surrounds the rotating shaft in an annular shape, mechanical structures (for example, disposed on both sides of the rotary encoder on the rotating shaft) There is a disadvantage that it is necessary to disassemble the generator and gearbox. For this reason, in the conventional generator (rotating electric machine) as described above, there is a problem in that it is not possible to easily replace a rotary encoder (rotation detecting unit) of a type that surrounds the rotating shaft portion in an annular shape.

  The present invention has been made in order to solve the above-described problems, and one object of the present invention is to facilitate replacement of a rotation detection unit of a type that surrounds a rotating shaft in an annular shape. It is to provide a rotating electrical machine.

Means for Solving the Problems and Effects of the Invention

  In order to achieve the above object, a rotating electrical machine according to a first aspect of the present invention includes a rotor and a stator having a rotating shaft portion, and a rotation detecting unit that detects the rotation of the rotor. An annular rotary member that is attached to the rotary shaft portion so as to surround the rotary shaft portion, rotates with the rotor using the rotary shaft portion as a rotary shaft, and a sensor portion that detects the rotation of the rotary member, The rotating member is attached to the rotating shaft so as to be split in the radial direction.

  In the rotating electrical machine according to the first aspect of the present invention, as described above, the rotation detector that detects the rotation of the rotor includes the annular rotating member that is attached to the rotating shaft so as to surround the rotating shaft. The annular rotating member is configured to be attached to the rotating shaft portion so as to be split in the radial direction. Thereby, when exchanging the rotation detecting unit, the annular rotating member attached to the rotating shaft unit is divided in the radial direction, whereby a mechanical structure (for example, disposed on both sides of the rotation detecting unit on the rotating shaft unit (for example, , The rotating member of the rotation detecting unit can be removed from the rotating shaft unit without disassembling the rotor, the stator and the gear box. Moreover, while arrange | positioning on a rotating shaft part in the state which divided | segmented the cyclic | annular rotating member in the radial direction, by combining the rotating member of those divided | segmented states on a rotating shaft part, at the time of replacement | exchange of a rotation detection part, The rotating member of the new rotation detecting unit can be attached to the rotating shaft unit without disassembling the mechanical structures arranged on both sides of the rotation detecting unit on the rotating shaft unit. As a result, it is possible to easily replace the type of rotation detector that surrounds the rotating shaft in an annular shape.

  A wind power generation system according to a second aspect of the present invention is connected to a rotating electrical machine including a rotor and a stator having a rotating shaft part, and a rotation detecting unit that detects rotation of the rotor, and to the rotating shaft part of the rotating electrical machine. The rotation detector is attached to the rotary shaft so as to surround the rotary shaft in an annular shape, and rotates with the rotor using the rotary shaft as the rotary shaft, and the rotation of the rotary member The annular rotating member is attached to the rotating shaft so as to be split in the radial direction.

  In the wind power generation system according to the second aspect of the present invention, as described above, the rotation detection unit that detects the rotation of the rotor of the rotating electrical machine has an annular shape that is attached to the rotation shaft so as to surround the rotation shaft. The rotating member is configured to be included, and the annular rotating member is configured to be attached to the rotating shaft portion so as to be split in the radial direction. Thereby, when exchanging the rotation detection unit of the rotating electrical machine, the mechanical structure is arranged on both sides of the rotation detection unit on the rotation shaft unit by dividing the annular rotation member attached to the rotation shaft unit in the radial direction. Without disassembling the body (for example, the rotor, the stator, the gear box, etc.), the rotating member of the rotation detecting unit that has become old can be removed from the rotating shaft unit. In addition, the annular rotating member is arranged on the rotating shaft portion in a state of being divided in the radial direction, and the divided rotating members are coupled on the rotating shaft portion, so that the rotation detecting portion of the rotating electrical machine can be replaced. The rotation member of the new rotation detection unit can be attached to the rotation shaft unit without disassembling the mechanical structures disposed on both sides of the rotation detection unit on the rotation shaft unit. As a result, it is possible to easily replace the type of rotation detector that surrounds the rotating shaft in an annular shape. Here, in general, in a wind power generation system that requires a long life and high reliability, among the components used in the wind power generation system, the life of the rotation detector that detects the rotation of the rotor of the rotating electrical machine is relatively short. In this case, in the present invention, the rotation detection unit having a relatively short life can be easily replaced, so that the time for stopping the entire wind power generation system with the replacement of the rotation detection unit can be shortened. Thereby, the operation rate of the whole wind power generation system can be improved.

  A rotation detector used for a rotating electrical machine according to a third aspect of the present invention is a rotation detector used for a rotating electrical machine including a rotor having a rotating shaft portion and a stator, and surrounds the rotating shaft portion of the rotating electrical machine in an annular shape. The annular rotating member is attached to the rotating shaft portion and rotates together with the rotor using the rotating shaft portion as a rotating shaft, and a sensor portion that detects the rotation of the rotating member. The annular rotating member is divided in the radial direction. It is attached to the rotating shaft as possible.

  The rotation detector used for the rotating electrical machine according to the third aspect of the present invention is configured to include the annular rotating member attached to the rotating shaft portion so as to surround the rotating shaft portion of the rotating electrical machine in an annular manner as described above. At the same time, the annular rotary member is configured to be attached to the rotary shaft portion so as to be split in the radial direction. Thereby, when exchanging the rotation detector, by dividing the annular rotating member attached to the rotation shaft portion in the radial direction, a mechanical structure (for example, disposed on both sides of the rotation detector on the rotation shaft portion) The rotating member of the rotation detector that has become old can be removed from the rotating shaft portion without disassembling the rotor, stator, and gear box. In addition, the annular rotating member is arranged on the rotating shaft portion in a state of being divided in the radial direction, and the divided rotating members are coupled on the rotating shaft portion, so that the rotating shaft can be replaced when the rotation detector is replaced. The rotating member of the new rotation detector can be attached to the rotating shaft portion without disassembling the mechanical structure disposed on both sides of the rotation detector on the unit. As a result, it is possible to easily replace the type of rotation detector that surrounds the rotating shaft in an annular shape.

It is a schematic diagram for demonstrating the structure of the wind power generation system by 1st and 2nd embodiment of this invention. It is sectional drawing for demonstrating the structure of the generator by 1st and 2nd embodiment of this invention. It is the enlarged front view which looked at the part to which the rotary encoder of the generator by 1st Embodiment of this invention is attached from the outer side of the housing | casing. It is the side view which looked at the part to which the rotary encoder of the generator by 1st Embodiment of this invention shown in FIG. 3 is attached from the arrow A direction side. It is sectional drawing along the 200-200 line | wire of FIG. It is the front view which showed the rotating member of the rotary encoder of the generator by 1st Embodiment of this invention. It is the front view which showed the state by which the rotating member of the rotary encoder of the generator by 1st Embodiment of this invention was divided | segmented. It is the front view which showed the sensor part of the rotary encoder of the generator by 1st and 2nd embodiment of this invention. It is a figure for demonstrating the procedure which attaches the rotating member of the rotary encoder of the generator by 1st Embodiment of this invention to a shaft. It is a figure for demonstrating the procedure which attaches the sensor part of the rotary encoder of the generator by the 1st and 2nd embodiment of this invention to the bearing cover of a housing | casing. It is the enlarged front view which looked at the part to which the rotary encoder of the generator by 2nd Embodiment of this invention is attached from the outer side of the housing | casing. It is the front view which showed the rotating member of the rotary encoder of the generator by 2nd Embodiment of this invention. It is a figure for demonstrating the procedure which attaches the rotating member of the rotary encoder of the generator by 2nd Embodiment of this invention to a shaft. It is the side view which showed the state which decomposed | disassembled the rotary member of the rotary encoder of the generator by the 1st modification of 1st Embodiment of this invention. It is the side view which showed the state which decomposed | disassembled the rotary member of the rotary encoder of the generator by the 2nd modification of 1st Embodiment of this invention. It is the front view which showed the sensor part of the rotary encoder of the generator by the 3rd modification of 1st and 2nd embodiment of this invention. It is the front view which showed the sensor part of the rotary encoder of the generator by the 4th modification of 1st and 2nd embodiment of this invention. It is the expanded sectional view which showed the arrangement | positioning relationship between the rotating member and sensor part of the rotary encoder of the generator by the 5th modification of 1st and 2nd embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
First, with reference to FIG. 1, the structure of the wind power generation system 100 containing the generator 1 by 1st Embodiment of this invention is demonstrated. The generator 1 is an example of the “rotary electric machine” in the present invention.

  As shown in FIG. 1, the wind power generation system 100 according to the first embodiment of the present invention includes a nacelle 2 in which a generator 1 having a shaft 10 and the like are accommodated, a rotor hub 3, and the generator 1 via the rotor hub 3. The blade 4 is connected to the shaft 10 and a tower (support column) 5 attached to the nacelle 2. The nacelle 2 accommodates a generator 1 having a shaft 10, a gear box 6, a coupling 7, a control box 8, and a rotary joint 9. The shaft 10 is an example of the “rotating shaft” in the present invention.

  The gear box 6 is a device for amplifying (increasing speed) the rotation of the blade 4 transmitted through the rotor hub 3. The coupling 7 is a device for connecting the gear box 6 and the shaft 10 of the generator 1. The control box 8 is a device for controlling the rotation of the blade 4 and the like. The rotary joint 9 is a device for transmitting a control signal transmitted from the control box 8 through the shaft 10 of the generator 1. In the first embodiment, a rotary encoder 50 described later is attached to the shaft 10 between the generator 1 and the rotary joint 9.

  Next, with reference to FIGS. 2-10, the structure of the generator 1 by 1st Embodiment of this invention is demonstrated.

  As shown in FIG. 2, the generator 1 includes a rotor 20 and a stator 30 having a hollow shaft 10, a casing 40 that houses the rotor 20 and the stator 30, and a rotary encoder 50 that detects the rotation of the rotor 20. It is comprised by. The housing 40 is configured to include a bearing cover 43 that covers the bearing 41 that supports the shaft 40. The rotor 20 is an example of the “rotor” in the present invention, and the stator 30 is an example of the “stator” in the present invention. The rotary encoder 50 is an example of the “rotation detector” and “rotation detector” in the present invention.

  The shaft 10 is rotatably supported by a pair of shaft holes 41 provided in the housing 40 via bearings 42. Further, the shaft 10 is configured to protrude to the outside of the housing 40 through the shaft hole 41. A step portion 11 (see FIG. 5) is provided at a portion of the rotary encoder 50 of the shaft 10 to which a rotating member 51 described later is attached.

  As shown in FIG. 2, the rotary encoder 50 includes a rotating member 51 and a sensor unit 52. As shown in FIG. 3, the rotating member 51 is attached to the shaft 10 so as to surround the shaft 10 in an annular shape. Further, as shown in FIG. 5, the rotating member 51 is attached so as to contact the step surface 11 a of the step portion 11 of the shaft 10. The rotating member 51 is configured to rotate with the rotor 20 about the shaft 10 as a rotation axis. The outer peripheral surface of the rotating member 51 (see the shaded portion in FIG. 5) is magnetized with a predetermined magnetic pattern.

  Further, as shown in FIG. 3, the sensor unit 52 is disposed so as to surround the shaft 10 in an annular shape. As shown in FIGS. 3 and 4, the sensor unit 52 is attached to the surface of the bearing cover 43 of the housing 40 with a hexagon socket screw 60. Further, as shown in FIG. 5, the sensor unit 52 is disposed so that the inner peripheral surface thereof faces the outer peripheral surface of the rotating member 51 in the radial direction. A magnetic sensor 520 is provided on the inner peripheral surface of the sensor unit 52. The magnetic sensor 520 is configured to detect the rotation of the rotating member 51 by reading the change in the magnetic pattern on the outer peripheral surface of the rotating member 51 accompanying the rotation of the rotor 20.

  Here, in the first embodiment, as shown in FIGS. 6 and 7, the rotating member 51 is formed in an annular shape and is configured to be split in the radial direction. Specifically, the rotating member 51 is configured to be divided into two members, a first rotating member 51a and a second rotating member 51b. Each of the first rotating member 51a and the second rotating member 51b has a substantially semicircular arc shape.

  Flange portions 510a and 510b for coupling the first rotating member 51a and the second rotating member 51b are provided at both ends of the first rotating member 51a and the second rotating member 51b. The flange portions 510a and 510b are provided so as to protrude to one surface side of each of the first rotating member 51a and the second rotating member 51b. Further, as shown in FIG. 9, the flange portions 510 a and 510 b are configured to protrude in the extending direction of the shaft 10 when the first rotating member 51 a and the second rotating member 51 b are attached to the shaft 10. Yes. The flange portion 510a is provided with a screw insertion hole 511a having an inner diameter larger than the outer diameter of the body portion of the hexagon socket head screw 70. The flange portion 510b is provided with a screw hole 511b having an internal thread formed on the inner surface.

  The first rotating member 51a and the second rotating member 51b are mutually connected via the screw insertion hole 511a of the flange portion 510a of the first rotating member 51a and the corresponding screw hole 511b of the flange portion 510b of the second rotating member 51b. By being screwed with a hexagon socket head screw 70, the shaft 10 is arranged so as to surround the ring 10. In the first embodiment, the rotation composed of the first rotation member 51a and the second rotation member 51b when the rotation member 51 is not attached to the shaft 10 and screwed together via the flange portions 510a and 510b. An inner diameter R1 (see FIG. 6) of the member 51 is configured to be smaller than an outer diameter R2 (see FIG. 9) of a portion to which the rotating member 51 of the shaft 10 is attached.

  As shown in FIG. 8, the sensor unit 52 is formed in an annular shape and is configured to be split in the radial direction. Specifically, the sensor unit 52 is configured to be divided into two members, a first sensor unit 52a and a second sensor unit 52b. Each of the first sensor unit 52a and the second sensor unit 52b has a substantially semicircular arc shape.

  Each of the first sensor part 52a and the second sensor part 52b is provided with two screw insertion holes 521 penetrating in the direction in which the shaft 10 extends. These screw insertion holes 521 are arranged at substantially equal angular intervals (approximately 90 ° intervals) in the circumferential direction in a state where the first sensor portion 52a and the second sensor portion 52b are annularly arranged in combination. It is configured. As shown in FIG. 10, the bearing cover 43 of the housing 40 is provided with a screw hole 430 corresponding to the screw insertion hole 521 of the first sensor portion 52a and the second sensor portion 52b. In the first embodiment, the first sensor unit 52a and the second sensor unit 52b are screwed to the bearing cover 43 by the hexagon socket head screw 60 via the screw insertion hole 521 and the corresponding screw hole 430. Therefore, it is configured to be arranged so as to face the rotating member 51 attached to the shaft 10.

  In general, when the divided structure as described above is adopted for the rotary encoder, the detection accuracy of the rotary encoder is lowered. On the other hand, in the rotary encoder used in the wind power generation system as in the first embodiment, the operation of the generator is reduced. Since the speed is relatively low, so high detection accuracy is not required. Accordingly, even if the rotary member 51 and the sensor unit 52 of the rotary encoder 50 of the first embodiment are configured to be separable as described above, no particular problem occurs.

  Next, a procedure for attaching the rotary encoder 50 to the generator 1 according to the first embodiment of the present invention will be described with reference to FIGS.

  First, as shown in FIG. 9, the rotary member 50 of the rotary encoder 50 is divided into a first rotary member 51 a and a second rotary member 51 b so as to surround the shaft 10 in an annular shape. And the position of the screw insertion hole 511a provided in the flange part 510a of the 1st rotation member 51a and the screw hole 511b of the flange part 510b of the 2nd rotation member 51b corresponding to it is match | combined. Then, the first rotating member 51 a and the second rotating member 51 b are screwed together using a hexagon socket screw 70. At this time, the surface of the first rotating member 51a and the second rotating member 51b opposite to the side from which the flange portions 510a and 510b protrude is brought into contact with the step surface 11a of the step portion 11 of the shaft 10. deep. In this manner, the rotary member 51 of the rotary encoder 50 is attached to the shaft 10 of the generator 1.

  Next, as shown in FIG. 10, the sensor unit 52 of the rotary encoder 50 is divided into the first sensor unit 52 a and the second sensor unit 52 b so as to surround the shaft 10 and to the outer peripheral surface of the rotating member 51. To be opposed from the outside in the radial direction. Then, the screw insertion holes 521 provided in the first sensor part 52a and the second sensor part 52b are aligned with the screw holes 510a provided in the bearing cover 43 of the housing 40 so as to correspond thereto. Then, the first sensor unit 52 a and the second sensor unit 52 b are screwed to the surface of the bearing cover 43 of the housing 40 using the hexagon socket screw 60. In this manner, the sensor unit 52 of the rotary encoder 50 is attached to the surface of the bearing cover 43 of the housing 40 of the generator 1.

  In the first embodiment, as described above, the rotary encoder 50 that detects the rotation of the rotor 20 is configured to include the annular rotating member 51 that is attached to the shaft 10 so as to surround the shaft 10 in an annular manner. The annular rotating member 51 is configured to be attached to the shaft 10 so as to be split in the radial direction. With this configuration, when the rotary encoder 50 is replaced, the annular rotary member 51 attached to the shaft 10 is divided in the radial direction, so that the machines are arranged on both sides of the rotary encoder 50 on the shaft 10. The rotating member 51 of the old rotary encoder 50 can be removed from the shaft 10 without disassembling the structure (for example, the rotor 20, the stator 30, and the rotary joint 9). Moreover, while arrange | positioning on the shaft 10 in the state which divided | segmented the cyclic | annular rotation member 51 in the radial direction, and connecting those rotation members 51 of the divided state on the shaft 10, at the time of replacement | exchange of the rotary encoder 50, The rotating member 51 of the new rotary encoder 50 can be attached to the shaft 10 without disassembling the mechanical structures disposed on both sides of the rotary encoder 50 on the shaft 10. As a result, it is possible to easily replace the rotary encoder 50 that surrounds the shaft 10 in an annular shape. Here, in general, in the wind power generation system 100 that requires a long life and high reliability, the life of the rotary encoder 50 that detects the rotation of the rotor 20 of the generator 1 is compared among the components used in the wind power generation system 100. Short. In this case, in the first embodiment, it is possible to easily replace the rotary encoder 50 having a relatively short life, so that the time for stopping the entire wind power generation system 100 with the replacement of the rotary encoder 50 is shortened. Can do. Thereby, the operation rate of the whole wind power generation system 100 can be improved.

  In the first embodiment, as described above, the annular rotating member 51 is constituted by the first rotating member 51a having an arc shape and the second rotating member 51b having an arc shape, and has an arc shape. The first rotating member 51a and the second rotating member 51b having an arc shape are configured so as to surround the shaft 10 in an annular shape. If comprised in this way, the 1st rotation member 51a which has circular arc shape, and the 2nd rotation member 51b which has circular arc shape will join, and the rotation member 51 will be cyclically formed so that the shaft 10 may be enclosed easily. can do.

  In the first embodiment, as described above, the flange portion 510a that protrudes in the extending direction of the shaft 10 at each end of the first rotating member 51a having the arc shape and the second rotating member 51b having the arc shape. And 510b, and the first rotating member 51a and the second rotating member 51b are screwed to each other via the flange portions 510a and 510b so as to surround the shaft 10 in an annular shape. If comprised in this way, coupling | bonding or removal of the 1st rotation member 51a and the 2nd rotation member 51b can be performed easily by using the flange parts 510a and 510b.

  In the first embodiment, as described above, the first rotating member 51a and the second rotation when the rotating member 51 is screwed to each other via the flange portions 510a and 510b in a state where the rotating member 51 is not attached to the shaft 10. The inner diameter R1 (see FIG. 6) of the annular rotating member 51 made of the member 51b is made smaller than the outer diameter R2 (see FIG. 9) of the portion of the shaft 10 to which the rotating member 51 is attached. With this configuration, when the rotating member 51 is attached to the shaft 10, the rotating member 51 including the first rotating member 51 a and the second rotating member 51 b rotates by an amount that is smaller than the outer diameter R <b> 2 of the shaft 10. Since the shaft 10 can be tightened by the member 51, the rotating member 51 can be firmly attached to the shaft 10.

  Further, in the first embodiment, as described above, the sensor unit 52 is provided so as to surround the shaft 10 in an annular shape in a state of facing the rotating member 51, and is configured to be divided in the radial direction. If comprised in this way, since attachment or removal of the sensor part 52 can be performed in the state which divided | segmented the sensor part 52, at the time of replacement | exchange of the sensor part 52 of the rotary encoder 50, on both sides of the rotary encoder 50 on the shaft 10. There is no need to disassemble the mechanical structure in place. Thereby, the sensor unit 52 of the rotary encoder 50 can be easily replaced.

  In the first embodiment, as described above, the sensor unit 52 is configured to include the first sensor unit 52a having the arc shape and the second sensor unit 52b having the arc shape, and the arc shape is changed. The first sensor portion 52a and the second sensor portion 52b having an arc shape are configured so as to surround the shaft 10 in an annular shape. If comprised in this way, the 1st sensor part 52a which has circular arc shape, and the 2nd sensor part 52b which has circular arc shape will be combined, and the sensor part 52 will be easily formed in an annular shape so that the shaft 10 may be surrounded. can do.

  Moreover, in 1st Embodiment, while providing the housing | casing 40 which accommodates the rotor 20 and the stator 30 as mentioned above, the sensor part 52 is screwed to the outer surface of the housing | casing 40 (bearing cover 43). Therefore, the rotating member 51 is arranged so as to face the rotating member 51. If comprised in this way, the sensor part 52 can be easily attached to the housing | casing 40 so that it may oppose with respect to the rotation member 51 by the simple structure by screwing.

(Second Embodiment)
Next, a wind power generation system 100a and a generator 1a according to a second embodiment of the present invention will be described with reference to FIGS. 1, 2, and 11 to 13. FIG. The second embodiment differs from the first embodiment in which the rotating member 51 is attached to the shaft 10 by screwing the first rotating member 51a and the second rotating member 51b to each other via the flange portions 510a and 510b. The rotating member 53 is attached to the shaft 10 by screwing the one rotating member 53a and the first rotating member 53a to the step surface 11a of the step portion 11 of the shaft 10.

  As shown in FIG. 1, a wind power generation system 100 a according to a second embodiment of the present invention includes a nacelle 2 that houses a generator 1 a and the like, a rotor hub 3, blades 4, and a tower (support column) 5. ing. A rotary encoder 50a, which will be described later, is attached to the shaft 10 between the generator 1a and the rotary joint 9. The generator 1a is an example of the “rotary electric machine” in the present invention. The rotary encoder 50a is an example of the “rotation detector” and “rotation detector” in the present invention.

  As shown in FIG. 2, the generator 1 a according to the second embodiment of the present invention rotates the rotor 20 and the stator 30 having the shaft 10, the housing 40 that houses the rotor 20 and the stator 30, and the rotation of the rotor 20. And a rotary encoder 50a to be detected. As shown in FIG. 11, the rotary encoder 50 a includes a rotating member 53 and a sensor unit 52. The rotating member 53 is attached to the shaft 10 so as to come into contact with the step surface 11a (see FIG. 13) of the step portion 11 of the shaft 10.

  Here, in the second embodiment, as shown in FIG. 12, the rotating member 53 is formed in an annular shape and is configured to be divided in the radial direction. Specifically, the rotating member 53 is divided into two members, a first rotating member 53a and a second rotating member 53b. Each of the first rotating member 53a and the second rotating member 53b has a semicircular arc shape.

  Each of the first rotating member 53a and the second rotating member 53b is provided with two screw insertion holes 530 penetrating in the direction in which the shaft 10 extends. These screw insertion holes 530 are arranged at substantially equal angular intervals (approximately 90 ° intervals) in the circumferential direction in a state where the first rotating member 53a and the second rotating member 53b are combined and arranged in an annular shape. It is configured. As shown in FIG. 13, a screw hole 110 corresponding to the screw insertion hole 530 of the first rotating member 53a and the second rotating member 53b is provided in the step surface 11a of the step portion 11 of the shaft 10. In the second embodiment, the first rotating member 53a and the second rotating member 53b are screwed to the step surface 11a by the hexagon socket screw 80 via the screw insertion hole 530 and the corresponding screw hole 110. Therefore, the shaft 10 is arranged so as to surround the shaft 10 in an annular shape.

  In addition, the other structure of 2nd Embodiment is the same as that of the said 1st Embodiment.

  Next, a procedure for attaching the rotary encoder 50a to the generator 1a according to the second embodiment of the present invention will be described with reference to FIG. Since the procedure for attaching the sensor unit 52 of the rotary encoder 50a to the bearing cover 43 of the housing 40 of the generator 1a is the same as that of the first embodiment, hereinafter, the rotating member 53 of the rotary encoder 50a is attached to the shaft 10. Only the installation procedure will be described.

  First, as shown in FIG. 13, the rotary member 50 of the rotary encoder 50 a is arranged so as to surround the shaft 10 in a state of being divided into a first rotary member 53 a and a second rotary member 53 b. Then, the first rotating member 53 a and the second rotating member 53 b are brought into contact with the step surface 11 a of the step portion 11 of the shaft 10. And the position of the screw insertion hole 530 provided in the 1st rotation member 53a and the 2nd rotation member 53b and the screw hole 110 provided in the level | step difference surface 11a so that it corresponds is match | combined. Thereafter, the first rotating member 53a and the second rotating member 53b are screwed to the step surface 11a using the hexagon socket screw 80. In this way, the rotary member 53 of the rotary encoder 50a is attached to the shaft 10 of the generator 1a.

  In 2nd Embodiment, while providing the level | step-difference part 11 in the part to which the rotation member 53 of the shaft 10 is attached as mentioned above, the 1st rotation member 53a which has circular arc shape, and the 2nd rotation member 53b which has circular arc shape. The shaft 10 is arranged so as to surround the shaft 10 by being screwed to the step surface 11a of the step portion 11. If comprised in this way, the rotation member 53 can be reliably attached to the shaft 10 by screwing the 1st rotation member 53a and the 2nd rotation member 53b to the shaft 10. FIG.

  The remaining effects of the second embodiment are similar to those of the aforementioned first embodiment.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the first and second embodiments, the example in which the present invention is applied to the generator of the wind power generation system is shown, but the present invention is not limited to this. The present invention is applicable to general rotating electrical machines such as generators and motors used in power generation systems other than wind power generation systems.

  In the first and second embodiments, the rotary member of the rotary encoder is configured to be divided into two members, the first rotary member and the second rotary member, and the sensor unit is the first sensor unit and the second sensor. Although the example which comprises the part which can be divided | segmented into two members was shown, this invention is not limited to this. In the present invention, the rotating member may be configured to be divided into three or more members, and the sensor unit may be configured to be divided into three or more members.

  Moreover, although the said 1st and 2nd embodiment showed the example which surrounds a shaft cyclically | annularly using the 1st rotation member and 2nd rotation member which have a substantially semicircular arc shape, this invention is not limited to this. In the present invention, the first rotating member and the second rotating member may each have a shape other than a substantially semicircular arc shape as long as the shaft can be surrounded annularly.

  Moreover, in the said 1st Embodiment, as shown in FIG. 9, the example which provides the flange parts 510a and 510b so that it might protrude on each one surface side of the 1st rotation member 51a and the 2nd rotation member 51b was shown. However, the present invention is not limited to this. In the present invention, as in the first modification shown in FIG. 14, the flange portions 512 a and 512 b may be provided so as to protrude from both sides of the first rotating member 51 a and the second rotating member 51 b. Thus, unlike the first embodiment in which the first rotating member 51a and the second rotating member 51b are coupled using a pair of flange portions 510a and 510b, the first rotating member 51a and the second rotating member 51b are combined. The two pairs of flange portions 512a and 512b can be used to bond more firmly.

  In the first embodiment, as shown in FIG. 9, the first rotating member 51a and the second rotating member 51b are provided with flange portions 510a and 510b, and the flange portions 510a and 510b are provided with the first rotating member 51a. Although the example which forms the screw insertion hole 511a and the screw hole 511b for couple | bonding and the 2nd rotation member 51b was shown, this invention is not limited to this. In the present invention, as in the second modification shown in FIG. 15, the screw insertion hole 513a and the screw hole 513b for connecting the first rotating member 51a and the second rotating member 51b are replaced with the first rotating member 51a and the first rotating member 51a. You may make it form directly in the 2 rotation member 51b.

  Moreover, in the said 1st and 2nd embodiment, although the sensor part was comprised by two members, a 1st sensor part and a 2nd sensor part, this invention is not limited to this. In the present invention, as in the third and fourth modifications shown in FIGS. 16 and 17, the sensor unit may be configured by one member. For example, the sensor unit 54 of FIG. 16 is configured by one member having a substantially semicircular arc shape. Moreover, the sensor part 55 of FIG. 17 is comprised by one member which has a circular arc shape smaller than the sensor part 54 of FIG. These sensor portions 54 and 55 are each provided with two screw insertion holes 541 and 551 for attaching the sensor portions 54 and 55 to the bearing cover 43 of the housing 40. In the present invention, the sensor unit may have a shape other than the arc shape.

  In the first and second embodiments, as shown in FIG. 5, a magnetic sensor is provided on the inner peripheral surface of the sensor unit, and the outer peripheral surface of the rotating member is magnetized in a predetermined pattern to Although the example which arrange | positions so that an inner peripheral surface and the outer peripheral surface of a rotation member may be made to oppose to radial direction was shown, this invention is not restricted to this. In the present invention, as in the fifth modification shown in FIG. 18, the magnetic sensor 520 is provided on the end surface of the sensor unit 56 in the axial direction opposite to the housing 40, and the shaft of the rotating member 57 on the housing 40 side is provided. The end face in the direction (see the shaded portion in FIG. 18) is magnetized in a predetermined pattern, and the end face on the opposite side to the casing 40 of the sensor section 56 and the end face on the casing 40 side of the rotating member 57 are connected to the shaft 10. You may arrange | position so that it may oppose in the axial direction. Moreover, in this invention, you may arrange | position so that the end surface by the side of the housing | casing of a sensor part and the end surface on the opposite side to the housing | casing of a rotation member may be made to oppose.

  Moreover, although the example which attaches a sensor part to the bearing cover of a housing | casing was shown in the said 1st and 2nd embodiment, this invention is not limited to this. In the present invention, the sensor unit may be attached to a part other than the bearing cover of the housing as long as it is a fixed part that does not rotate.

  Moreover, although the example which attaches a rotary encoder between a generator and a rotary joint was shown in the said 1st and 2nd embodiment, this invention is not limited to this. In the present invention, the rotary encoder may be attached at any position on the shaft. For example, a rotary encoder may be attached between the generator and the coupling.

1, 1a Generator (Rotating electric machine)
4 Blade 10 Shaft (Rotating shaft)
11 Stepped portion 11a Stepped surface 20 Rotor (rotor)
30 Stator
40 Housing 50, 50a Rotary encoder (rotation detector, rotation detector)
51, 53, 57 Rotating member 51a, 53a First rotating member 51b, 53b Second rotating member 510a, 510b, 512a, 512b Flange part 52, 54, 55, 56 Sensor part 52a First sensor part 52b Second sensor part 100 , 100a Wind power generation system

Claims (10)

A rotor and a stator having a rotating shaft portion;
A rotation detector for detecting rotation of the rotor,
The rotation detector
An annular rotary member attached to the rotary shaft portion so as to surround the rotary shaft portion in an annular shape, and rotating together with the rotor using the rotary shaft portion as a rotary shaft;
A sensor unit for detecting rotation of the rotating member,
The annular rotating member is a rotating electrical machine that is attached to the rotating shaft portion so as to be divided in a radial direction. The annular rotating member includes a first rotating member having an arc shape and a second rotating member having an arc shape,
The rotating electrical machine according to claim 1, wherein the first rotating member having the arc shape and the second rotating member having the arc shape are arranged so as to surround the rotating shaft portion in an annular shape. A flange portion protruding in a direction in which the rotating shaft portion extends is provided at each end of the first rotating member having the arc shape and the second rotating member having the arc shape,
3. The rotating electrical machine according to claim 2, wherein the first rotating member and the second rotating member are arranged to surround the rotating shaft portion in an annular shape by being screwed together via the flange portion. .   In a state where the rotating member is not attached to the rotating shaft portion, the inner diameter of the annular rotating member composed of the first rotating member and the second rotating member when screwed together via the flange portion is: The rotating electrical machine according to claim 3, wherein the rotating electric machine is smaller than an outer diameter of a portion to which the rotating member is attached. A step portion is provided in a portion of the rotating shaft portion to which the rotating member is attached,
The first rotating member having the arc shape and the second rotating member having the arc shape are arranged so as to surround the rotating shaft portion in an annular shape by being screwed to the step surface of the step portion. The rotating electrical machine according to claim 2.   The said sensor part is provided so that it may surround the said rotating shaft part cyclically | annularly in the state facing the said rotation member, and it is comprised so that division | segmentation is possible in radial direction. The rotating electrical machine described in 1. The sensor unit includes a first sensor unit having an arc shape and a second sensor unit having an arc shape,
The rotating electrical machine according to claim 6, wherein the first sensor portion having the arc shape and the second sensor portion having the arc shape are arranged so as to surround the rotating shaft portion in an annular shape. A housing for accommodating the rotor and the stator;
The rotating electrical machine according to any one of claims 1 to 7, wherein the sensor unit is disposed to face the rotating member by being screwed to an outer surface of the casing. . A rotating electrical machine including a rotor and a stator having a rotating shaft portion, and a rotation detecting unit that detects rotation of the rotor;
A blade connected to the rotating shaft portion of the rotating electrical machine,
The rotation detector
An annular rotary member attached to the rotary shaft portion so as to surround the rotary shaft portion in an annular shape, and rotating together with the rotor using the rotary shaft portion as a rotary shaft;
A sensor unit that detects rotation of the rotating member;
The annular rotating member is a wind power generation system attached to the rotating shaft portion so as to be split in a radial direction. A rotation detector used in a rotating electric machine including a rotor having a rotating shaft portion and a stator,
An annular rotating member attached to the rotating shaft portion so as to surround the rotating shaft portion of the rotating electrical machine in an annular manner, and rotating together with the rotor about the rotating shaft portion;
A sensor unit for detecting rotation of the rotating member;
The annular rotating member is a rotation detector used for a rotating electrical machine, which is attached to the rotating shaft portion so as to be divided in a radial direction.

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