JP5889420B2 - Elevator hoisting machine - Google Patents

Description

  The present invention relates to an elevator hoisting machine that generates a driving force for moving a car.

  Conventionally, in order to reduce noise from a motor, a structure is known in which a vibration damping member is interposed between a stator and a housing to reduce vibration of the motor (see Patent Document 1).

JP 2006-166554 A

  However, in an elevator hoisting machine including a motor, the motor becomes larger as the speed and capacity increase, so that the damping member interposed between the stator and the housing is deformed by the weight of the stator. It becomes difficult to assemble the rotor and the stator coaxially. Further, in the conventional motor, the elastic deformation of the stator itself caused by the electromagnetic excitation force of the motor cannot be suppressed, and noise due to motor vibration cannot be further reduced.

  This invention is made in order to solve the above subjects, and it aims at obtaining the hoist for elevators which can reduce a noise more reliably.

  The elevator hoisting machine according to the present invention has a drive sheave, a cylindrical stator whose one axial end is supported by a support base, and a rotor that is arranged coaxially with the stator and rotated with respect to the stator, A motor that rotates the drive sheave by the rotation of the rotor and a suppressor that is provided at the other axial end of the stator and suppresses elastic deformation of the stator in which the radial dimension of the stator changes are provided.

  According to the elevator hoisting machine of the present invention, the elastic deformation of the stator itself can be suppressed by the suppressing body at the other axial end of the stator where the stator itself is likely to be elastically deformed. Can be effectively suppressed. Therefore, the noise of the hoisting machine can be reduced more reliably.

It is a block diagram which shows the elevator by Embodiment 1 of this invention. It is a longitudinal cross-sectional view which shows the winding machine of FIG. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2. It is an enlarged view which shows the principal part of the suppression body of FIG. It is a schematic diagram which shows the state of the elastic deformation of the stator of FIG. 3 which vibrates in an elliptical mode. It is a schematic diagram which shows the state of the elastic deformation of the stator of FIG. 3 which vibrates in an elliptical mode. It is a schematic diagram which shows the state of the elastic deformation of the stator of FIG. 3 which vibrates in a triangle mode. It is a schematic diagram which shows the state of the elastic deformation of the stator of FIG. 3 which vibrates in a triangle mode. It is a longitudinal cross-sectional view which shows the winding machine for elevators by Embodiment 2 of this invention. FIG. 10 is a cross-sectional view taken along line XX in FIG. 9. It is a longitudinal cross-sectional view which shows the winding machine for elevators by Embodiment 3 of this invention. It is sectional drawing along the XII-XII line | wire of FIG.

Preferred embodiments of the present invention will be described below with reference to the drawings.
Embodiment 1 FIG.
1 is a block diagram showing an elevator according to Embodiment 1 of the present invention. In the figure, a car 2 and a counterweight 3 are provided in the hoistway 1 so as to be able to move up and down. A machine room 4 is provided in the upper part of the hoistway 1. The machine room 4 is provided with a hoisting machine (elevator hoisting machine) 5 that generates a driving force for raising and lowering the car 2 and the counterweight 3 in the hoistway 1, and a baffle 6.

  The hoisting machine 5 includes a hoisting machine main body 7 and a driving sheave 8 that is rotated by the driving force of the hoisting machine main body 7. The baffle wheel 6 is arranged away from the drive sheave 8. The car 2 and the counterweight 3 are suspended in the hoistway 1 by a plurality of suspension bodies 9 wound around the drive sheave 8 and the deflector wheel 6. As the suspension body 9, for example, a rope or a belt is used. The car 2 and the counterweight 3 are moved up and down in the hoistway 1 by the rotation of the drive sheave 8.

  FIG. 2 is a longitudinal sectional view showing the hoist 5 of FIG. FIG. 3 is a cross-sectional view taken along line III-III in FIG. Further, FIG. 4 is an enlarged view showing a main part of the suppressing body 23 of FIG. In the figure, the hoisting machine 5 is supported on a support base 11 fixed in the machine room 4 with the axis of the hoisting machine 5 being horizontal. The support base 11 is arranged in the horizontal direction with the base part 12 and the first support parts 13 which are arranged apart from each other in the axial direction of the hoisting machine 5 (that is, in the horizontal direction) and fixed on the base part 12. And a second support portion 14.

  The hoisting machine main body 7 is provided on the rotating shaft 21 arranged coaxially with the axis of the hoisting machine 5, the motor 22 that generates a driving force for rotating the rotating shaft 21, and the motor 22. It has the suppression body 23 for suppressing, and the cover 24 which covers the motor 22 and the suppression body 23 collectively.

  The rotary shaft 21 is rotatably supported on each of the first support portion 13 and the second support portion 14 via a bearing (not shown). The rotating shaft 21 passes through the first support portion 13 and the second support portion 14. The drive sheave 8 is fixed to the rotating shaft 21 in a state of being disposed in a space between the first support portion 13 and the second support portion 14. As a result, the drive sheave 8 is rotated integrally with the rotary shaft 21.

  The motor 22 is provided on the side opposite to the drive sheave 8 side when viewed from the second support portion 14 in the axial direction of the hoisting machine 5. The motor 22 includes a cylindrical stator 25 that surrounds the rotating shaft 21 and a rotor 26 that is disposed in the stator 25 via a predetermined gap and is fixed to the rotating shaft 21.

  The stator 25 is arranged coaxially with the rotary shaft 21 in a state where one end portion in the axial direction of the stator 25 is supported by the second support portion 14. The stator 25 includes a cylindrical stator core 27 surrounding the rotor 26 and a stator coil 28 provided on the stator core 27. The stator core 27 is a laminated body configured by laminating a plurality of steel plates. The stator coil 28 is provided on the stator core 27 in a state where a part of the stator coil 28 protrudes from the stator core 27 in the axial direction of the rotating shaft 21.

  A cylindrical first fixing ring (stator fixing member) 29 is fixed to the side surface of the second support portion 14 on the motor 22 side by a plurality of bolts 40. The stator 25 is supported by the second support portion 14 with one end portion in the axial direction of the stator core 27 fitted in the first fixing ring 29. One end of the stator core 27 in the axial direction is fixed to the first fixing ring 29 by, for example, welding.

  A cylindrical second fixing ring (stator fixing member) 30 is attached to the other axial end of the stator core 27. The second fixing ring 30 is attached to the stator core 27 in a state where the other axial end of the stator core 27 is fitted in the second fixing ring 30. The second fixing ring 30 is fixed to the other axial end of the stator core 27 by, for example, welding.

  The rotor 26 is disposed coaxially with the stator 25. The rotor 26 includes a rotor core 31 fixed to the rotating shaft 21 and a plurality of permanent magnets 32 provided on the rotor core 31 and arranged in the circumferential direction of the rotor core 31. The rotor core 31 is a laminated body configured by laminating a plurality of steel plates.

  The stator 25 generates a rotating magnetic field by energizing the stator coil 28. The rotor 26 and the rotating shaft 21 rotate with respect to the stator 25 according to the rotating magnetic field generated by the stator 25. The drive sheave 8 is rotated by the rotation of the rotor 26.

  When the rotor 26 rotates, the stator 25 receives the exciting force in the radial direction of the motor 22 by the electromagnetic force generated between the stator core 27 and the permanent magnet 32. As a result, when the rotor 26 is rotated by energization of the stator coil 28, the stator 25 is subjected to an exciting force, so that elastic deformation in which the radial dimension of the stator 25 changes is likely to occur in the stator 25. Vibration due to elastic deformation of the stator 25 is likely to occur in the stator 25.

  The suppressing body 23 is provided at the other axial end of the stator core 27. The suppressing body 23 suppresses elastic deformation of the stator 25 in which the radial dimension of the stator 25 changes. Further, the suppressing body 23 is arranged on the inner side in the radial direction with respect to the plurality of (8 in this example) mounting blocks (mounting portions) 33 fixed to the second fixing ring 30 and the mounting blocks 33. A connection plate (connection member) 34 and a plurality (eight in this example) of connection members 35 for individually connecting each of the mounting blocks 33 and the common connection plate 34 are provided.

  Each mounting block 33 is fixed to the stator core 27 via the second fixing ring 30. Each mounting block 33 protrudes from the second fixing ring 30 in the direction away from the second support portion 14 in the axial direction of the rotating shaft 21. As shown in FIG. 3, the mounting blocks 33 are arranged apart from each other on a line along the circumferential direction of the stator 25 when the stator 25 is viewed along the axial direction of the rotating shaft 21. In this example, a plurality of mounting blocks 33 are arranged at equal intervals in the circumferential direction of the stator 25.

  The connection plate 34 is disposed inside the second fixing ring 30 when the stator 25 is viewed along the axial direction of the rotary shaft 21. Further, the connection plate 34 is arranged perpendicular to the axis of the rotation shaft 21. In this example, the connection plate 34 is a disc having an outer diameter smaller than the outer diameter of the rotor 26.

  The connecting members 35 are arranged away from each other in the circumferential direction of the stator 25. In this example, the connecting members 35 are arranged at equal intervals in the circumferential direction of the stator 25. Further, the connecting members 35 are arranged radially about the connection plate 34 when the stator 25 is viewed along the axial direction of the rotating shaft 21. Further, as shown in FIG. 4, each connecting member 35 includes a long plate-like first arm 36 attached to the attachment block 33, and a long plate-like second arm 37 attached to the connection plate 34. And a viscoelastic body 38 having viscosity and elasticity and sandwiched between the first arm 36 and the second arm 37.

  The first arm 36 has a first facing portion 36a, and the second arm 37 has a second facing portion 37a. The first arm 36 and the second arm 37 are arranged in a state where the first facing portion 36 a and the second facing portion 37 a are opposed to each other in the axial direction of the rotation shaft 21. The viscoelastic body 38 is sandwiched between the first facing portion 36a and the second facing portion 37a in the axial direction of the rotating shaft 21. The first arm 36 and the second arm 37 are connected to each other via a viscoelastic body 38. In this example, the viscoelastic body 38 is fixed to each of the first facing portion 36a and the second facing portion 37a with an adhesive. Examples of the material constituting the viscoelastic body 38 include rubber and resin. The elastic deformation of the stator 25 in which the radial dimension of the stator 25 changes is mainly suppressed by the viscoelastic deformation of the viscoelastic body 38.

  The cover 24 covers the motor 22 and the suppressing body 23 together. The cover 24 is attached to the second support portion 14 with bolts or the like.

  Next, the operation will be described. When the stator 25 generates a rotating magnetic field by energizing the stator coil 28, the rotor 26 rotates with respect to the stator 25. As a result, the drive sheave 8 rotates and the car 2 and the counterweight 3 are raised and lowered in the hoistway 1.

  When the rotor 26 is rotated with respect to the stator 25, the stator 25 receives an exciting force in the radial direction of the motor 22 by an electromagnetic force generated between the stator 25 and the rotor 26. At this time, as the rotational speed of the rotor 26 increases, the excitation frequency due to the electromagnetic force between the stator 25 and the rotor 26 also increases.

  When the excitation frequency becomes high and the excitation frequency becomes close to the resonance frequency of each component of the hoisting machine 5 and the support base 11 (for example, the stator 25 and the second support portion 14), the stator 25 and the second The support portion 14 is easily elastically deformed. In particular, when the stator 25 vibrates while elastically deforming in a low-order vibration mode (for example, an elliptical mode (secondary vibration mode) or a triangular mode (third-order vibration mode)), the deformation amount of the stator 25 increases. The noise of vibration due to the elastic deformation of the stator 25 tends to increase. Further, the vibration due to the elastic deformation of the stator 25 is larger at the other axial end portion of the stator 25 away from the second support portion 14 than at one axial end portion of the stator 25 near the second support portion 14. Cheap.

  5 and 6 are schematic views showing the state of elastic deformation of the stator 25 of FIG. 3 that vibrates in the elliptical mode, and FIGS. 7 and 8 are schematic views showing the state of elastic deformation of the stator 25 of FIG. 3 that vibrates in the triangular mode. FIG. As shown in FIGS. 5 to 8, when the stator 25 vibrates while receiving the exciting force in the radial direction of the motor 22, elastic deformation in which the radial dimension of the stator 25 changes (FIGS. 5 to 5). 8 is generated in the stator 25. Further, the position of the antinode of vibration (that is, the position of the portion of the stator 25 that is most elastically deformed radially outward of the stator 25 by the vibration of the stator 25) is determined for each next vibration mode.

  When the stator 25 vibrates and elastic deformation in which the radial dimension of the stator 25 changes occurs in the stator 25, in the suppressing body 23, the first arm 36 and the second arm 37 are in the radial direction of the stator 25. The viscoelastic body 38 undergoes viscoelastic deformation while shifting from each other. Thereby, the excitation force received by the stator 25 is absorbed by the viscoelastic deformation of the viscoelastic body 38, and the vibration due to the elastic deformation of the stator 25 is attenuated and suppressed.

  In such a hoisting machine 5, one end portion in the axial direction of the stator 25 is supported by the second support portion 14, and the suppressing body 23 that suppresses elastic deformation of the stator 25 in which the radial dimension of the stator 25 changes is the stator. 25, the elastic deformation of the stator 25 itself can be suppressed by the suppressing body 23 at the other axial end of the stator 25 where the elastic deformation of the stator 25 is likely to occur. The vibration due to the elastic deformation of 25 itself can be effectively suppressed. Therefore, noise caused by vibration of the motor 22 can be more reliably reduced.

  Further, the restraining body 23 is arranged on the inner side in the radial direction with respect to the plurality of mounting blocks 33 disposed on the line along the circumferential direction of the stator 25 when the stator 25 is viewed along the axial direction. Since the connecting plate 34 and the plurality of connecting members 35 for connecting the connecting blocks 33 and the connecting plates 34 are provided, the mounting blocks 33 are connected by the connecting members 35 and the connecting plates 34. It is possible to partially cancel the elastic deformation of the stator 25 between the mounting blocks 33. Thereby, the vibration by the elastic deformation of the stator 25 in which the radial dimension of the stator 25 changes can be further effectively suppressed.

  Further, since each connecting member 35 has a viscoelastic body 38 having viscosity and elasticity, vibration due to the elastic deformation of the stator 25 can be absorbed by the viscoelastic deformation of the viscoelastic body 38. Vibration due to elastic deformation can be efficiently suppressed with a simple configuration.

  In the above example, the connection member 35 is configured such that the viscoelastic body 38 is sandwiched between the first arm 36 and the second arm 37. The connecting member 35 may be made of an alloy. If it does in this way, the connection member 35 can be manufactured with the same material, and the structure of the connection member 35 can be further simplified.

  In the above example, the plurality of mounting blocks 33 are arranged at equal intervals in the circumferential direction of the stator 25, but the intervals between the plurality of mounting blocks 33 may not be equal. For example, the mounting block 33 may be arranged in accordance with the positions of the antinodes of the elliptical mode and the triangular mode. The mounting block 33 may be arranged in accordance with the position of the vibration antinode in the next or higher vibration mode. That is, the position where the connecting member 35 is attached to the stator 25 may be set based on the position of the antinode of vibration in the vibration mode. In this case, the number of connecting members 35 also changes according to the number of mounting blocks 33.

Embodiment 2. FIG.
FIG. 9 is a longitudinal sectional view showing an elevator hoist 5 according to Embodiment 2 of the present invention. FIG. 10 is a cross-sectional view taken along line XX of FIG. In the figure, the restraining body 23 provided at the other axial end of the stator core 27 includes a cylindrical mounting ring (mounting portion) 41 fixed to the second fixing ring 30 and a radially inner side than the mounting ring 41. And a plurality (eight in this example) of connecting members 43 that connect the attachment ring 41 and the connecting plate 42 to each other. The configuration of the connection plate 42 is the same as the configuration of the connection plate 34 in the first embodiment.

  The attachment ring 41 is fixed to the stator core 27 via the second fixing ring 30. Further, as shown in FIG. 6, the attachment ring 41 protrudes from the second fixing ring 30 in the direction away from the second support portion 14 in the axial direction of the rotating shaft 21. As shown in FIG. 7, the attachment ring 41 is disposed on a line along the circumferential direction of the stator 25 when the stator 25 is viewed along the axial direction of the rotating shaft 21.

  The connecting members 43 are arranged away from each other in the circumferential direction of the stator 25. In this example, when the stator 25 is viewed along the axial direction of the rotating shaft 21, the connecting members 43 are arranged at equal intervals in the circumferential direction of the stator 25 and are arranged radially around the connection plate 34. Has been. Each connecting member 43 is a metal spring (elastic body) having one end connected to the mounting ring 41 and the other end connected to the connection plate 42. In this example, each connecting member 43 is a coil spring. The positions at which the respective one end portions of the connecting members 43 are connected to the mounting ring 41 are positions set at equal intervals in the circumferential direction of the stator 25. Each connecting member 43 is connected between the attachment ring 41 and the connection plate 42 in a normal state in which the stator 25 is not elastically deformed and in a natural length state in which the stator 25 is not expanded or contracted.

  When elastic deformation in which the radial dimension of the stator 25 changes occurs in the stator 25, the connecting member 43 that is a spring generates an elastic restoring force against the elastic deformation of the stator 25. Thereby, the vibration by the elastic deformation of the stator 25 is suppressed. Other configurations are the same as those in the first embodiment.

  Thus, even if each connecting member 43 is a spring, elastic deformation of the stator 25 in which the radial dimension of the stator 25 changes can be suppressed by the elastic restoring force of the connecting member 43. Thereby, the noise by the vibration of the motor 22 can be reduced more reliably.

  In the above example, the connection positions of the connection members 43 with respect to the attachment ring 41 are positions set at equal intervals in the circumferential direction of the stator 25. You may make it set each connection position based on the position of the antinode of vibration in each vibration mode (for example, secondary and tertiary etc.).

Embodiment 3 FIG.
FIG. 11 is a longitudinal sectional view showing an elevator hoist 5 according to Embodiment 3 of the present invention. FIG. 12 is a cross-sectional view taken along line XII-XII in FIG. In the figure, the restraining body 23 provided at the other axial end of the stator core 27 includes a cylindrical mounting ring (mounting portion) 51 fixed to the second fixing ring 30 and a radially inner side than the mounting ring 51. And a plurality of (in this example, eight) connecting members 53 that connect the attachment ring 51 and the connecting plate 52 to each other. The configurations of the mounting ring 51 and the connection plate 52 are the same as the configurations of the mounting ring 41 and the connection plate 42 in the second embodiment.

  The connecting members 53 are arranged away from each other in the circumferential direction of the stator 25. In this example, when the stator 25 is viewed along the axial direction of the rotating shaft 21, the connecting members 43 are arranged at equal intervals in the circumferential direction of the stator 25 and are arranged radially around the connection plate 34. Has been. Each connecting member 53 is an oil damper having one end connected to the mounting ring 51 and the other end connected to the connection plate 52.

  Each connecting member 53 has a cylinder 54 that contains oil, and a first plunger 55 and a second plunger 56 that are displaceable with respect to the cylinder 54 while receiving a resistance force due to the pressure of the oil in the cylinder 54. doing. The first plunger 55 and the second plunger 56 protrude from the cylinder 54 in opposite directions. The first plunger 55 is connected to the attachment ring 51, and the second plunger 56 is connected to the connection plate 52. The connection positions of the respective connecting members 43 with respect to the mounting ring 41 are positions set at equal intervals in the circumferential direction of the stator 25.

  When elastic deformation in which the radial dimension of the stator 25 changes occurs in the stator 25, the connecting member 53, which is an oil damper, generates a resistance force due to the oil pressure in the cylinder 54 against the elastic deformation of the stator 25. Thereby, the vibration by the elastic deformation of the stator 25 is suppressed. Other configurations are the same as those in the first embodiment.

  Thus, even if each connecting member 53 is an oil damper, the elastic deformation of the stator 25 in which the radial dimension of the stator 25 changes can be suppressed by the resistance force of the connecting member 53. Thereby, the noise by the vibration of the motor 22 can be reduced more reliably.

  In the above example, the connection positions of the connection members 53 with respect to the attachment ring 51 are positions set at equal intervals in the circumferential direction of the stator 25. You may make it set each connection position based on the position of the antinode of vibration in each vibration mode (for example, secondary and tertiary etc.).

  In the first embodiment, the plurality of mounting blocks 33 are fixed to the second fixing ring 30. However, instead of the plurality of mounting blocks 33, the mounting rings 41 and 51 in the second or third embodiment are used. You may fix to the 2nd fixing ring 30. FIG.

  In the second and third embodiments, the mounting rings 41 and 51 are fixed to the second fixing ring 30. Instead of the mounting rings 41 and 51, the plurality of mounting blocks 33 in the first embodiment are used. You may fix to the 2nd fixing ring 30. FIG.

  Moreover, in each said embodiment, although the number of the connection members 35, 43, 53 is eight, it is not limited to this, The number of the connection members 35, 43, 53 should just be two or more.

  Further, of the connecting member 35 in the first embodiment, the connecting member 43 in the second embodiment, and the connecting member 53 in the third embodiment, the connecting members in two or more embodiments are combined to suppress the body 23. May be configured. For example, the suppressing body 23 may have all of the connecting members 35, 43, and 53.

Claims (4)

Driving sheave,
A cylindrical stator having one axial end supported by a support; and a rotor arranged coaxially with the stator and rotated with respect to the stator; and the drive sheave is rotated by the rotation of the rotor. A motor, and a suppressor that is provided at the other axial end of the stator and suppresses elastic deformation of the stator in which the radial dimension of the stator changes
The restraining body is disposed on a line along the circumferential direction of the stator when the stator is viewed along the axial direction, and is disposed on the radially inner side with respect to the mounting portion. An elevator hoisting machine having a connecting member and a plurality of connecting members that are arranged apart from each other in the circumferential direction of the stator and connect the attachment portion and the connecting member . The elevator hoist according to claim 1 , wherein at least one of the plurality of connecting members includes a viscoelastic body having viscosity and elasticity. The elevator hoist according to claim 1 , wherein at least one of the plurality of connecting members is a spring. The elevator hoist according to claim 1 , wherein at least one of the plurality of connecting members is an oil damper.

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