WO2015005052A1 - ワニス含浸装置及びワニス含浸方法 - Google Patents
ワニス含浸装置及びワニス含浸方法 Download PDFInfo
- Publication number
- WO2015005052A1 WO2015005052A1 PCT/JP2014/065507 JP2014065507W WO2015005052A1 WO 2015005052 A1 WO2015005052 A1 WO 2015005052A1 JP 2014065507 W JP2014065507 W JP 2014065507W WO 2015005052 A1 WO2015005052 A1 WO 2015005052A1
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- WIPO (PCT)
- Prior art keywords
- stator
- varnish
- coil end
- heating device
- diameter side
- Prior art date
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines
- H02K15/125—Heating or drying of machines in operational state, e.g. standstill heating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C13/00—Means for manipulating or holding work, e.g. for separate articles
- B05C13/02—Means for manipulating or holding work, e.g. for separate articles for particular articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
- B05C9/08—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation
- B05C9/14—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation involving heating or cooling
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines
Definitions
- the present invention relates to a varnish impregnation apparatus and a varnish impregnation method, and more particularly to a varnish impregnation apparatus and a varnish impregnation method suitable for impregnating a varnish into a stator coil mounted on a stator core.
- the varnish impregnation device described in Patent Document 1 includes a support mechanism that rotatably supports a stator having a stator core mounted with a stator coil.
- This support mechanism has a work rotation shaft that is inserted into a hollow space in the center of the axis of the stator core. The work rotation shaft is used to support the stator on the inner diameter side of the stator, and The stator is rotated by rotation.
- the varnish impregnation apparatus includes a dropping nozzle that drops the varnish toward the coil end portion of the stator rotated while being supported by the support mechanism, and a heating device that heats the stator supported by the support mechanism. .
- the heating device sends hot air toward the stator supported by the support mechanism. This heating device preheats the stator to reduce the viscosity of the varnish to be dropped onto the coil end portion of the stator, and drops the varnish after the varnish is dropped onto the coil end portion of the stator.
- the prepared varnish is heated and cured.
- the varnish impregnation apparatus described in Patent Document 2 has an induction heating coil inserted into a hollow space at the center of the stator core, induction heating the stator, and the stator transferred to another station for varnish impregnation. Perform varnish impregnation.
- the stator core is placed on a receiving stand in a state where the axis thereof is directed in the vertical direction, an induction coil is inserted into a hollow portion at the center of the axis of the stator core, and the stator is fixed to the stator. After induction heating from the inner diameter side, the stator is transferred to another station for impregnating varnish, and the stator core is placed on a receiving stand with its axis directed in the vertical direction, and then impregnated with varnish.
- the stator core is placed on the receiving stand with the axis thereof oriented in the vertical direction and varnish impregnation is performed, there is a possibility that the varnish that overflows from the coil and adheres to the outer peripheral surface of the stator.
- the present invention has been made in view of the above-mentioned points, and the varnish supports the stator while efficiently and effectively heating the stator having the stator coil mounted on the stator core for impregnating the stator coil with the varnish. It is an object of the present invention to provide a varnish impregnation apparatus and a varnish impregnation method capable of preventing adhesion to a mechanism.
- the above object is a varnish impregnation device for impregnating a varnish into a stator coil mounted on a stator core having slots opened radially inward, wherein the stator core is mounted with the stator coil.
- the stator is supported on the outer diameter side of the stator in a state where the axial direction of the stator is oriented in the horizontal direction, and the stator is rotated by being driven to rotate by a rotating device, and is supported by the support mechanism.
- a varnish dropping device for dropping the varnish toward the coil end portion of the stator rotating while the stator is supported by the support mechanism, and the stator is disposed in a hollow portion at the axial center of the stator core of the stator.
- a stator inner diameter side heating device that heats from the inner diameter side of the varnish.
- Another object of the present invention is to provide a varnish impregnation method in which a stator coil mounted on a stator core having slots opened radially inward is impregnated with varnish, and is axially moved while being held on the outer diameter side by a support mechanism.
- the stator with the stator coil mounted on the stator core which is supported in a state in which the stator core is oriented in a horizontal direction, is fixed to the inner diameter of the stator by a stator inner diameter side heating device disposed in a hollow portion at the center of the stator core.
- a preheating step of heating from the side, and after heating in the preheating step, the axial direction of the axial direction is held horizontally while being gripped on the outer diameter side by the support mechanism in a state where the stator inner diameter side heating device is retracted from the cavity portion Toward the coil end portion of the stator that rotates with the rotation drive of the support mechanism by the rotating device.
- a varnish dropping step of dropping the varnish with a varnish dropping device and after the varnish dropping in the varnish dropping step, the stator is held on the outer diameter side of the stator by the support mechanism and the axial direction is horizontally oriented
- a heat curing step in which the varnish dripped onto the coil end portion is heated and cured by the stator inner diameter side heating device in a state where the stator inner diameter side heating device is disposed in the hollow portion. This is achieved by the varnish impregnation method provided.
- ADVANTAGE OF THE INVENTION According to this invention, it can prevent that a varnish adheres to the support mechanism of a stator, heating the stator by which the stator coil was mounted
- FIG. 1 It is a block diagram of the varnish impregnation apparatus which is one Example of this invention. It is principal part sectional drawing of the varnish impregnation apparatus of a present Example. It is a figure for demonstrating the method of attaching the stator and the structure of the support mechanism which supports the stator which the varnish impregnation apparatus of a present Example dripping a varnish, and the stator supports. It is an operation
- FIG. 1 shows a configuration diagram of a varnish impregnation apparatus 10 according to an embodiment of the present invention.
- 1A shows a front view of the varnish impregnation apparatus 10
- FIG. 1B shows a side view of the varnish impregnation apparatus 10 (a cross-sectional view depending on a part).
- FIG. 2 shows a cross-sectional view of the essential parts of the varnish impregnation apparatus 10 of the present embodiment.
- FIG. 3 is a view for explaining the structure of a stator having a stator coil in which the varnish impregnation apparatus 10 of this embodiment drops varnish, the structure of a support mechanism for supporting the stator, and a method for attaching the stator to the support mechanism. Indicates.
- the varnish impregnation apparatus 10 of the present embodiment is an apparatus for impregnating a varnish into a stator coil 14 of a stator 12 used in a rotating electrical machine such as a three-phase AC motor.
- the varnish is used to ensure the electrical insulation, earthquake resistance, oil resistance, chemical resistance, heat dissipation, and the like of the stator coil 14.
- the stator 12 is a stator that is disposed to face the rotor, which is a rotor, radially outward via a predetermined air gap, and generates a magnetic field that rotates the rotor by energizing the stator coil 14.
- the stator 12 includes a stator coil 14 and a stator core 16.
- the stator core 16 is a member formed in a hollow cylindrical shape, and includes a yoke 18 formed in an annular shape, a hollow portion 20 vacated in a columnar shape at the center of the shaft, and a radially inner side from the inner peripheral surface of the yoke 18 ( That is, it has the teeth 22 which protrude toward the axial center side.
- a plurality of teeth 22 are provided on the inner peripheral surface of the yoke 18 at equal intervals in the circumferential direction.
- the stator core 16 is formed by laminating a plurality of insulating coated steel sheets in the axial direction.
- the stator core 16 has a fixing ear 24 that protrudes in a mountain shape from the outer peripheral surface of the yoke 18 toward the radially outer side.
- a plurality of (for example, three) fixing ears 24 are provided on the stator core 16 in the circumferential direction.
- the fixing ear 24 is provided with a through hole 26 penetrating in the axial direction.
- the stator coil 14 is mounted on the stator core 16 described above. Specifically, the stator coil 14 is wound around the teeth 22 while being accommodated in a slot formed between two teeth 22 adjacent in the circumferential direction. The slot is opened toward the radially inner side in the stator core 16.
- the stator coil 14 constitutes any one of a U-phase coil, a V-phase coil, and a W-phase coil.
- the phase coil, the V-phase coil, and the W-phase coil are wound around the tooth 22 in that order in the circumferential direction.
- the stator coil 14 has coil end portions 14 a and 14 b that protrude from the inside of the slot of the stator core 16 toward both sides in the axial direction.
- the varnish impregnation apparatus 10 includes a support mechanism 30 that supports the stator 12 in which the stator coil 14 is mounted on the stator core 16.
- the support mechanism 30 is an outer diameter grip ring that contacts the outer surface of the stator core 16 (specifically, the yoke 18) of the stator 12 and grips the stator 12 on the outer diameter side of the stator 12.
- the support mechanism 30 is referred to as an outer diameter grip ring 30.
- the outer diameter grip ring 30 is disposed between both axial end surfaces on the outer peripheral side of the stator core 16 of the stator 12 to be supported, and the stator 12 is supported by a member protruding toward the radially inner side (axial center side). To support.
- the outer diameter grip ring 30 supports the stator 12 with its axial direction oriented in the horizontal direction.
- the outer diameter grip ring 30 includes a ring portion 32 formed in an annular shape and a clamp portion 34 that supports the stator core 16.
- the ring portion 32 is rotatably supported with respect to a frame mold 36 fixed to the ground.
- a hollow hollow portion 38 is formed at the center of the axis of the ring portion 32.
- the cavity 38 is formed in a size necessary to accommodate the stator core 16 over the entire circumference.
- the diameter of the hollow portion 38 that is, the inner diameter of the ring portion 32 is set to be larger than the outer diameter of the portion including the fixing ear portion 24 of the stator core 16.
- the size of the ring portion 32 it is possible to cope with the stator 12 having a wide range of outer diameters.
- the clamp portion 34 includes a protruding portion 34a that protrudes radially inward (axial center side) from the inner peripheral surface of the ring portion 32, and a chuck portion that can change the radial position of the ring portion 32 in the cavity portion 38. 34b.
- a protruding portion 34a that protrudes radially inward (axial center side) from the inner peripheral surface of the ring portion 32
- a chuck portion that can change the radial position of the ring portion 32 in the cavity portion 38. 34b.
- the projecting portion 34 a sandwiches the fixing ear portion 24 of the stator core 16 on both sides in the circumferential direction, thereby gripping the stator core 16 and thus the stator 12 on the outer diameter side of the stator 12, so that it cannot rotate with respect to the ring portion 32.
- the protruding portion 34 a is fixed to the ring portion 32.
- the projecting portion 34a is composed of a pair of protrusions so as to sandwich the fixing ear portion 24 of the stator core 16 in the circumferential direction, and in accordance with the shape of the fixing ear portion 24, both protrusions are spaced apart in the circumferential direction of the ring portion 32. Each protrusion is configured to have an appropriate shape.
- the chuck portion 34 b has a role for facilitating attachment / detachment of the stator 12 to / from the outer diameter grip ring 30 and a role for supporting the stator 12 on the outer diameter grip ring 30.
- the chuck portion 34 b includes a rotating portion 34 b-1 that is rotatably supported with respect to the ring portion 32, and a fixed portion 34 b-2 that is fixed to the ring portion 32.
- the rotating portion 34b-1 is a member extending in a curved rod shape, and one end side is supported and fixed to the ring portion 32.
- the rotating portion 34b-1 is positioned at a clamp position (in the “clamping time” state in FIG. 3) with the other end side positioned relatively radially inward in the cavity portion 38 with the fulcrum on one end side fixed to the ring portion 32 as the center. It is possible to rotate between the position shown) and the unclamping position where the other end side is located relatively outside in the cavity 38 (the position shown at “unclamping” in FIG. 3).
- the fixing portion 34b-2 has a role of restricting the rotation of the rotation portion 34b-1 between the clamp position and the unclamp position.
- the chuck part 34b is provided in two places in the circumferential direction of the ring part 32.
- Each chuck portion 34b supports the stator 12 by contacting the outer peripheral surface of the stator core 16 of the stator 12 accommodated in the cavity portion 38 of the ring portion 32 at the clamp position described above.
- the contact between the tip of the rotating portion 34b-1 and the outer peripheral surface of the stator core 16 of the stator 12 accommodated in the cavity portion 38 of the ring portion 32 is eliminated. Release support.
- the two chuck portions 34b provided apart from each other in the circumferential direction of the ring portion 32 are operated in synchronization. It should be noted that the rotating part 34b-1 of the two chuck parts 34b provided apart from each other in the circumferential direction of the ring part 32 may be rotated between the clamping position and the unclamping position by a spring force or the like. Good.
- the varnish impregnation apparatus 10 is also provided with a rotation motor 40 that rotationally drives the outer diameter grip ring 30 and a rotation support member 42 that supports the outer diameter grip ring 30. Both the housing of the rotary motor 40 and the rotation support member 42 are fixed to the frame mold 36. As described above, when the size of the ring portion 32 is changed to cope with the stator 12 having a wide range of outer diameters, the outer diameter within a certain range without changing the position of the rotation support member 42. However, by changing the position of the rotation support member 42, it is possible to reliably support the rotation of the ring portion 32 of the outer diameter grip ring 30 while supporting a wide range of outer diameters.
- the rotary motor 40 is rotated by an electrical command from a controller mainly composed of a microcomputer.
- Two rotation support members 42 are provided below and on the outer peripheral side of the outer diameter grip ring 30, and are members that support the outer diameter grip ring 30 so as to be rotatable about its axis.
- the rotation shaft of the rotary motor 40 is connected to the ring portion 32 of the outer diameter grip ring 30 via a bearing 44.
- the rotation of the rotary motor 40 is transmitted to the ring portion 32 of the outer diameter grip ring 30 via the bearing 44.
- the outer diameter grip ring 30 is rotated by the rotation of the rotary motor 40 while being supported by the rotation support member 42.
- the stator 12 supported by the outer diameter grip ring 30 rotates around the axis along with the rotation.
- the outer diameter grip ring 30 is driven to rotate by the rotary motor 40 to rotate the supporting stator 12. Accordingly, in the varnish impregnation apparatus 10, the stator 12 with the stator coil 14 mounted on the stator core 16 is rotated by the rotation of the rotary motor 40 while being held and supported on the outer diameter side by the outer diameter holding ring 30.
- the varnish impregnation device 10 is also provided with a varnish dripping device 50.
- the varnish dropping device 50 is a device that drops the varnish toward the coil end portions 14 a and 14 b of the stator 12 that is rotated by the rotary motor 40 while being supported by the outer diameter grip ring 30.
- the varnish dripping device 50 has a dripping nozzle 52 that communicates with a tank in which the varnish is stored.
- the varnish dripping device 50 draws the varnish from the dripping nozzle 52 by pumping the varnish in the tank with a pump or the like and supplying it to the dripping nozzle 52 in accordance with an electrical command from the controller.
- the varnish dropping device 50 includes a first outer diameter side dropping nozzle 52a-out and a first inner diameter side dropping nozzle 52a-in corresponding to the coil end portion 14a as the dropping nozzle 52, and the coil end portion 14b.
- the second outer diameter side dropping nozzle 52b-out and the second inner diameter side dropping nozzle 52b-in corresponds to the second outer diameter side dropping nozzle 52b-out and the second inner diameter side dropping nozzle 52b-in.
- the first outer diameter side dropping nozzle 52a-out is for dropping varnish toward the outer diameter side of the coil end portion 14a.
- the first inner diameter side dropping nozzle 52a-in is for dropping varnish toward the inner diameter side of the coil end portion 14a.
- the second outer diameter side dropping nozzle 52b-out is for dropping the varnish toward the outer diameter side of the coil end portion 14b.
- the second inner diameter side dropping nozzle 52b-in is for dropping the varnish toward the inner diameter side of the coil end portion 14b.
- Each of the dropping nozzles 52 of the varnish dropping device 50 and the stator 12 supported by the outer diameter gripping ring 30 include the dropping position of the dropping nozzle 52 in the vicinity of the coil end portions 14a and 14b of the stator 12 and the coil end portions 14a and 14b. It can be relatively moved so as to be disposed at any one of the retracted positions deviated from.
- each dropping nozzle 52 can be moved in the vertical direction and horizontal direction (specifically, the axial direction of the supported stator 12) with respect to the frame mold 36 by the moving mechanism 54.
- the moving mechanism 54 controls the movement of the dropping nozzle 52 in accordance with an electrical command from the controller.
- the moving mechanism 54 moves the dripping nozzle 52 in the vertical direction and the horizontal direction with respect to the frame mold 36, so that the dripping nozzle 52 should be positioned when the varnish is dripped and the retreat that should be located when the varnish is not dripped. It is possible to move forward and backward between the positions.
- the dropping positions of the first and second outer diameter side dropping nozzles 52a-out, 52b-out are located on the radially outer side of the coil end portions 14a, 14b of the stator 12 supported by the outer diameter gripping ring 30 at the tip ends of the nozzles.
- the varnish lowered by gravity is dropped onto the outer diameter side of the coil end portions 14a and 14b.
- the dropping positions of the first and second inner diameter side dropping nozzles 52a-in, 52b-in are the radially inner sides of the coil end portions 14a, 14b of the stator 12 whose tip ends are supported by the outer diameter grip ring 30. In the region above the coil end portions 14a and 14b at the lower part of the ring (on the axial center side), this is the position where the varnish dropped by gravity drops onto the inner diameter side of the coil end portions 14a and 14b.
- each dropping nozzle 52 is, for example, from the position of the coil end portion 14a, 14b in the region above the coil end portion 14a, 14b of the stator 12 supported by the outer diameter grip ring 30 at the nozzle tip. This is a position in a region offset in the horizontal direction (specifically, axially outside).
- the first outer diameter side dropping nozzle 52a-out and the first inner diameter side dropping nozzle 52a-in for dropping the varnish to the same coil end portion 14a are moved synchronously by the integrated moving mechanism 54. It may be a thing.
- the dropping nozzles 52a-out, 52a-In is first moved down from the retracted position and then moved in the horizontal direction (rightward in FIG. 1B).
- both the first outer diameter side dropping nozzle 52a-out and the first inner diameter side dropping nozzle 52a-in reach the dropping position.
- the moving mechanism 54 moves the dropping nozzles 52a-out, 52a-in from the dropping position to the retracted position in the reverse order to the movement to the dropping position.
- -In is first moved horizontally from the dropping position (to the left in FIG. 1B) and then moved upward. When such movement is performed, both the first outer diameter side dropping nozzle 52a-out and the first inner diameter side dropping nozzle 52a-in reach the retracted position.
- the second outer diameter side dropping nozzle 52b-out and the second inner diameter side dropping nozzle 52b-in for dropping the varnish to the same coil end portion 14b are moved synchronously by the integrated moving mechanism 54. It may be done.
- the dropping nozzles 52b-out, 52b-In is first moved down from the retracted position and then moved in the horizontal direction (leftward in FIG. 1B).
- the moving mechanism 54 moves the dropping nozzles 52b-out, 52b-in from the dropping position to the retracted position in the reverse order to the movement to the dropping position.
- -In is first moved horizontally from the dropping position (to the right in FIG. 1B) and then moved upward.
- the varnish impregnation device 10 also includes two types of heating devices 60 and 62 that heat the stator 12.
- the heating device 60 is a device that heats the stator 12 from the inner diameter side of the stator 12.
- the heating device 62 is a device that heats the stator 12 from the outer diameter side and / or the axially outer side of the stator 12.
- the heating device 60 is referred to as a first heating device 60
- the heating device 62 is referred to as a second heating device 62, respectively.
- the first heating device 60 has an induction coil 64 that extends in a spiral shape.
- the induction coil 64 is disposed in the cavity 20 of the stator core 16 when the stator 12 is heated.
- the outer diameter of the induction coil 64 is smaller than the diameter of the cavity 20.
- the induction coil 64 is electrically connected to the controller. When the induction coil 64 is inserted into the cavity 20, the current flowing in response to a command from the controller changes, so that an eddy current is generated in the stator 12 by electromagnetic induction and the stator 12 is induction-heated (IH). .
- the first heating device 60 and the stator 12 supported by the outer diameter grip ring 30 are arranged so that the first heating device 60 is disposed either inside or outside the cavity 20 of the stator core 16 of the stator 12. Relative movement is possible. Specifically, the first heating device 60 can be moved in the horizontal direction (specifically, the axial direction of the supported stator 12) with respect to the frame mold 36 by the moving mechanism 66.
- the moving mechanism 66 controls the movement of the first heating device 60 by an electrical command from the controller.
- the moving mechanism 66 moves the first heating device 60 in the horizontal direction with respect to the frame mold 36, thereby causing the induction coil 64 to move to a predetermined position (induction heating position) inside the cavity 20 of the supported stator 12. And a predetermined position (retracted position) on the outside.
- the induction coil 64 can inductively heat the stator 12 when it is located inside the cavity 20 of the supported stator 12, while it is located outside the cavity 20 of the supported stator 12. Induction heating of the stator 12 becomes impossible.
- the second heating device 62 has a hot air nozzle 70 communicating with a hot air generator (not shown).
- the hot air nozzle 70 is provided corresponding to each of the coil end portions 14 a and 14 b at both ends in the axial direction of the stator 12.
- the second heating device 62 includes a hot air nozzle 70a corresponding to the coil end portion 14a and a hot air nozzle 70b corresponding to the coil end portion 14b as the hot air nozzle 70.
- the hot air nozzle 70a is for blowing hot air toward the periphery (outer surface) of the coil end portion 14a.
- the hot air nozzle 70b is for blowing hot air toward the periphery (outer surface) of the coil end portion 14b.
- the second heating device 62 heats the stator 12 with hot air by sending hot air generated in the hot air generator in response to a command from the controller from the tip of the hot air nozzle 70 toward the coil end portions 14a and 14b.
- the hot air nozzle 70 is disposed in the vicinity of the coil end portions 14 a and 14 b when the stator 12 is heated. Specifically, the hot air nozzle 70 is disposed such that the tip of the hot air nozzle 70 is located radially outside and axially outside the corners of the outer diameter ends and the axial outer ends of the coil end portions 14a and 14b. When the stator 12 is heated, the tip of the hot air nozzle 70 faces the corners between the outer diameter ends and the axially outer ends of the coil end portions 14a and 14b.
- a plurality (for example, eight) of hot air nozzles 70a are provided at equal intervals around the coil end portion 14a.
- the hot air nozzle 70b is provided with two or more (for example, eight pieces) at equal intervals around the coil end part 14b.
- a cylindrical cover 72a is attached to the outer peripheral side of the hot air nozzle 70a.
- the cover 72a is formed so as to surround all the hot air nozzles 70a from the outer peripheral side.
- all the hot air nozzles 70a are configured such that the tip thereof faces the corner portion of the coil end portion 14a inside the side surface of the cover 72a while penetrating the axial end surface of the cover 72a in the axial direction.
- the cover 72a is disposed so as to cover the coil end portion 14a from the outer peripheral side when the stator 12 is heated, and it is difficult for the hot air from the hot air nozzle 70a to escape to the outside so that the stator 12 (particularly the coil end portion 14a) can be easily heated. It has a function.
- a cylindrical cover 72b is attached to the outer peripheral side of the hot air nozzle 70b.
- the cover 72b is formed so as to surround all the hot air nozzles 70b from the outer peripheral side.
- all the hot air nozzles 70b are configured to face the corners of the coil end portion 14b on the inner side of the side surface of the cover 72b while penetrating the axial end surface of the cover 72b in the axial direction.
- the cover 72b is disposed so as to cover the coil end portion 14b from the outer peripheral side when the stator 12 is heated, and it is difficult for the hot air from the hot air nozzle 70b to escape to the outside so that the stator 12 (particularly the coil end portion 14b) is easily heated. It has a function.
- the hot air nozzle 70a of the second heating device 62 and the stator 12 supported by the outer diameter gripping ring 30 include the position where the hot air nozzle 70a is near the coil end portion 14a of the stator core 16 of the stator 12 and the coil end portion 14a. Relative movement is possible so as to be arranged at any one of the positions.
- the hot air nozzle 70 a of the second heating device 62 is supported via the link part 74 so as to be rotatable and movable with respect to the frame mold 36.
- a hot air nozzle 70 a is attached to one end side of the link portion 74, and the other end side of the link portion 74 is supported and fixed to the frame mold 36.
- the hot air nozzle 70a and the link portion 74 can be rotated around the fulcrum C with respect to the frame mold 36 by the moving mechanism 76 and are also horizontally (specifically, the axial direction of the supported stator 12). It is movable.
- the axial direction of the fulcrum C is the same as the axial direction of the stator 12 supported by the outer diameter grip ring 30.
- the moving mechanism 76 controls the movement of the hot air nozzle 70a of the second heating device 62 in accordance with an electrical command from the controller.
- the moving mechanism 76 rotates the link portion 74 with respect to the frame mold 36 and moves the link portion 74 in the horizontal direction so that the hot air nozzle 70a is positioned at the hot air heating position that should be positioned when hot air is blown onto the outer surface of the coil end portion 14a. It is possible to move forward and backward between a retracted position (a region indicated by a broken line in FIG. 1A) that should be positioned when hot air is not blown.
- the hot air heating position is such that the tips of all the hot air nozzles 70a are located radially outside and axially outside the corners of the outer diameter end and the axial outer end of the coil end portion 14a.
- the retracted position is, for example, a position that is offset radially outward and axially outward from the hot air heating position.
- the link unit 74 is first moved from the retracted position to the fulcrum C in a predetermined direction (clockwise direction in FIG. 1A). And then moved horizontally (rightward in FIG. 1B). When such rotation and movement are performed, the hot air nozzle 70a reaches the hot air heating position. Further, when moving the hot air nozzle 70a from the hot air heating position to the retracted position, the moving mechanism 76 first moves the link unit 74 to the hot air heating position in the reverse order to the rotation and movement to the hot air heating position. From the horizontal direction (leftward in FIG. 1 (B)) and then rotated in a predetermined direction (counterclockwise in FIG. 1 (A)) around the fulcrum C.
- the hot air nozzle 70b of the second heating device 62 is integrally attached to the first heating device 60 described above.
- the hot air nozzle 70b can be moved in the horizontal direction (specifically, the axial direction of the supported stator 12) with respect to the frame mold 36 together with the first heating device 60 by the moving mechanism 66 described above.
- the movement mechanism 66 controls the movement of the hot air nozzle 70b of the second heating device 62 at the same time when the movement of the first heating device 60 is controlled by an electrical command from the controller.
- the moving mechanism 66 moves the hot air nozzle 70b of the second heating device 62 in the horizontal direction with respect to the frame mold 36, so that the hot air nozzle 70b should be positioned at the time of blowing hot air to the outer surface of the coil end portion 14b. It is possible to move forward and backward between the hot air heating position and the retreat position that should be positioned when hot air is not blown.
- This hot air heating position is such that the tips of all the hot air nozzles 70b are located radially outside and axially outside the corners of the outer diameter end and the axial outer end of the coil end portion 14b.
- the retracted position is, for example, a position that is offset radially outward and axially outward from the hot air heating position.
- the stator 12 is not heated.
- the hot air nozzle 70 is located at the hot air heating position, since the hot air from the hot air nozzle 70 is blown to the outer surfaces of the coil end portions 14a and 14b, the stator 12 is heated.
- mold 36 of the varnish impregnation apparatus 10 are installed in the inside of one box.
- FIG. 4 shows an operation diagram of the varnish impregnation apparatus 10 of this embodiment when the stator 12 is attached.
- FIG. 5 shows an operation diagram of the varnish impregnation apparatus 10 of the present embodiment when the supported stator 12 is preheated.
- FIG. 6 shows an operation diagram of the varnish impregnation apparatus 10 of this embodiment when the varnish is dropped onto the coil end portions 14a and 14b of the supported stator 12.
- FIG. FIG. 7 shows an operation diagram of the varnish impregnation apparatus 10 of this embodiment when the varnish dropped on the coil end portions 14a and 14b is cured by heating.
- the varnish impregnation apparatus 10 includes (1) a stator mounting step in which the stator 12 is supported on the outer diameter side by the outer diameter grip ring 30 in order to impregnate the stator coil 14 of the stator 12 with the varnish. 2) a preheating step for preheating the supported stator 12, (3) a varnish dropping step for dropping varnish onto the coil end portions 14a, 14b of the preheated stator 12, and (4) a coil end portion 14a, Each process of the heat curing process which heat-hardens the varnish dripped at 14b is implemented in that order.
- the varnish impregnation device 10 first places each dropping nozzle 52 of the varnish dropping device 50 in the retracted position by the moving mechanism 54 and moves the first heating device 60 and the varnish impregnating device 10 by the moving mechanism 66 as shown in FIG.
- the hot air nozzle 70b of the second heating device 62 is positioned at the retracted position
- the hot air nozzle 70a of the second heating device 62 is positioned at the retracted position by the moving mechanism 76.
- the rotating portion 34b-1 of the chuck portion 34b of the outer diameter grip ring 30 is rotated to the unclamping position
- the stator 12 that is the workpiece is fixed to the fixing ear portion 24 of the stator core 16 by a pair of protrusions.
- the rotating portion 34b-1 is rotated to the clamp position.
- the stator 12 housed in the cavity 38 of the ring portion 32 of the outer diameter grip ring 30 has the fixing ear portion 24 of the stator core 16 sandwiched between the pair of protrusions 34a in the circumferential direction.
- the outer peripheral surface of the stator core 16 is supported in contact with the tip of the rotating portion 34b-1, so that the outer diameter grip ring 30 grips and supports the stator 12 on the outer diameter side.
- the controller of the varnish impregnation apparatus 10 next performs a preheating step.
- the preheating step first, as shown in FIG. 5, the hot air of the first heating device 60 and the second heating device 62 is moved by the moving mechanism 66 while the dropping nozzles 52 of the varnish dropping device 50 are located at the retracted position.
- the nozzle 70 b is moved to the induction heating position or the hot air heating position, and the moving mechanism 76 moves the hot air nozzle 70 a of the second heating device 62 to the hot air heating position, and the rotation motor 40 is rotated.
- the induction coil 64 of the first heating device 60 is inserted into the cavity 20 of the stator 12 supported by the outer diameter grip ring 30 and the coil end of the stator 12 is also inserted.
- the second heating is performed on the outer peripheral side of the portions 14a and 14b (specifically, on the outer side in the radial direction and on the outer side in the axial direction with respect to the corner between the outer diameter end and the axial outer end of the coil end portions 14a and 14)
- the hot air nozzle 70 of the device 62 is disposed with its tip directed toward the corners of the coil end portions 14a, 14b.
- the stator 12 supported by the outer diameter grip ring 30 is induction-heated by the induction coil 64, and the stator 12 (mainly the coil end portions 14a and 14b) is turned into the coil end portion 14a. 14b, hot air from the hot air nozzle 70 is blown directly on the outer surface (specifically, the corner), or the space in the covers 72a, 72b rises in temperature due to the hot air from the hot air nozzle 70. Is done.
- the controller of the varnish impregnation apparatus 10 next performs a varnish dropping step.
- the varnish dropping step first, as shown in FIG. 6, the hot air nozzle 70 b of the first heating device 60 and the second heating device 62 is moved to the retracted position by the moving mechanism 66, and the second is moved by the moving mechanism 76.
- the hot air nozzle 70a of the heating device 62 is moved to the retracted position, and then each dropping nozzle 52 of the varnish dropping device 50 is moved to the dropping position by the moving mechanism 54.
- the induction coil 64 of the first heating device 60 is retracted from the inside to the outside of the cavity portion 20 of the stator 12 supported by the outer diameter grip ring 30, and the second heating device 62.
- the hot air nozzle 70 is retracted from the vicinity of the coil end portions 14a and 14b of the stator 12, and the dropping nozzles 52 are disposed at the dropping positions above the coil end portions 14a and 14b.
- the varnish in the tank is supplied toward the dropping nozzle 52 by operating a pump or the like.
- the varnish is dropped from the dropping nozzle 52 toward the coil end portions 14 a and 14 b of the stator 12 supported by the outer diameter grip ring 30.
- the varnish is dropped evenly over the entire circumference of the coil end portions 14a and 14b.
- the varnish dropped on the coil end portions 14 a and 14 b easily penetrates into the stator coil 14.
- the rotation of the stator 12 when the varnish is dropped may be changed depending on the model of the stator 12, and the forward and reverse rotations are repeatedly oscillated. May be.
- various stators 12 according to the type of winding such as distributed winding and concentrated winding, and the type of coil such as fine round wire and flat wire.
- each dropping nozzle 52 of the varnish dropping device 50 is moved to the retracted position by the moving mechanism 54, and then the first heating device 60 and the second heating mechanism 66 are moved by the moving mechanism 66.
- the hot air nozzle 70b of the heating device 62 is moved to the induction heating position or the hot air heating position, and the moving mechanism 76 moves the hot air nozzle 70a of the second heating device 62 to the hot air heating position.
- each of the dropping nozzles 52 is retracted from the dropping position above the coil end portions 14 a and 14 b and is inserted into the cavity portion 20 of the stator 12 supported by the outer diameter grip ring 30.
- the induction coil 64 of the first heating device 60 is inserted and the outer peripheral side of the coil end portions 14a and 14b of the stator 12 (specifically, the outer diameter ends of the coil end portions 14a and 14 and the axial direction thereof)
- the hot air nozzle 70 of the second heating device 62 is disposed in a state where the tip thereof is directed to the corner of the coil end portions 14a and 14b, on the outer side in the radial direction and the outer side in the axial direction with respect to the corner with the outer end.
- the stator 12 supported by the outer diameter grip ring 30 is induction-heated by the induction coil 64, and the stator 12 (mainly the coil end portions 14a and 14b) is turned into the coil end portion 14a. 14b, hot air from the hot air nozzle 70 is blown directly on the outer surface (specifically, the corner), or the space in the covers 72a, 72b rises in temperature due to the hot air from the hot air nozzle 70. Is done.
- the varnish dropped on the coil end portions 14a and 14b is heated and cured.
- the controller of the varnish impregnating device 10 next moves the first heating device 60 and the second heating device 66 by the moving mechanism 66.
- the hot air nozzle 70b of the second heating device 62 is moved to the retracted position, and the moving mechanism 76 moves the hot air nozzle 70a of the second heating device 62 to the retracted position.
- the induction coil 64 of the first heating device 60 and the hot air nozzle 70 of the second heating device 62 are moved to the retracted position while each dropping nozzle 52 of the varnish dropping device 50 is positioned at the retracted position. Is evacuated.
- the rotating portion 34b-1 of the chuck portion 34b of the outer diameter grip ring 30 is rotated to the unclamping position.
- the contact between the tip of the rotating portion 34b-1 and the outer peripheral surface of the stator core 16 of the stator 12 accommodated in the cavity portion 38 of the ring portion 32 of the outer diameter grip ring 30 is eliminated. Therefore, the support on the outer diameter side of the stator 12 is released.
- the stator 12 impregnated with varnish can be taken out from the cavity 38 of the ring portion 32 of the outer diameter grip ring 30.
- the stator 12 is preferably taken out at a timing after the stator 12 is cooled.
- the stator 12 is attached to the outside of the stator 12 by the outer diameter grip ring 30 that is rotatably supported by the frame mold 36 in which the ring portion 32 is fixed to the ground. While supporting and rotating on the radial side, the supported stator 12 is preheated before dropping the varnish, and then the varnish is dropped on the coil end portions 14a and 14b of the preheated stator 12, and the The varnish dripped onto the coil end portions 14a and 14b can be heated and cured.
- the stator 12 in which the cavity portion 20 is formed at the shaft center is not supported on the cavity portion 20 side (inner diameter side), but on the outer diameter side. It is gripped by the grip ring 30 and is supported between both axial end surfaces of the stator core 16. In such a structure, when supporting the stator 12, it is not necessary to dispose a support member or a support mechanism in the cavity 20 on the inner diameter side of the stator 12.
- the induction coil 64 of the first heating device 60 can be inserted and disposed in the cavity 20 on the inner diameter side of the stator 12 when the stator 12 is heated. It is possible to heat from the 12 inner diameter side. Therefore, the stator 12 can be efficiently and effectively heated.
- the 2nd heating apparatus 62 can be arrange
- the heating time for preheating the stator 12 and the heating time for performing the heat curing of the varnish can be shortened.
- Productivity can be improved.
- the induction coil 64 of the first heating device 60 inserted and disposed in the cavity 20 on the inner diameter side of the stator 12 is heated as close as possible to the inner diameter surface of the stator core 16 when the stator 12 is heated. be able to.
- the induction heating by the induction coil is performed from the outer diameter side of the stator 12 where the fixing ear portion 24 that protrudes radially outward on the outer peripheral surface of the yoke 18 exists.
- induction heating of the stator 12 can be performed efficiently and effectively, so that the heating time can be shortened or energy for heating the stator 12 to a desired temperature can be reduced.
- varnish impregnation of the stator coil 14 using the varnish dripping device 50 is performed so that the stator 12 is gripped on the outer diameter side of the stator 12 by the outer diameter grip ring 30 and both end surfaces in the axial direction of the stator core 16. It is performed in a state of being supported between.
- the varnish dripping device 50 impregnates the varnish, it is not necessary to insert a support member or a support mechanism into the cavity 20 on the inner diameter side of the stator 12, and the stator 12 is inserted into the cavity 20. It is not necessary to leave the heating device that heats the heater inserted and arranged. For this reason, according to the present embodiment, it is possible to prevent the varnish overflowing from the stator 12 supported by the outer diameter grip ring 30 from adhering to a support mechanism or a heating device including the outer diameter grip ring 30. Can do.
- the varnish impregnation to the stator coil 14 using the varnish dropping apparatus 50 and the varnish heat curing after the varnish impregnation are performed in a state where the stator 12 is rotated with respect to the frame mold 36.
- the varnish dripped onto the stator 12 can be easily penetrated into the stator 12, and the varnish is prevented from overflowing and dripping directly onto the induction coil 64, for example. can do.
- the rotary motor 40 is included in the “rotating device” described in the claims
- the outer diameter grip ring 30 is included in the “support mechanism” described in the claims
- the first heating device corresponds to the “stator inner diameter side heating device” described in the claims
- the second heating device 62 corresponds to the “coil end portion heating device” described in the claims.
- the stator 12 as the workpiece is rotated with respect to the frame 36 in any of the preliminary heating process, the varnish dropping process, and the heat curing process of the stator 12.
- the present invention is not limited to this, and the stator 12 may be rotated with respect to the frame mold 36 at least in the varnish dropping step.
- the dropping nozzles 52 of the varnish dropping device 50 are arranged on both the inner diameter side and the outer diameter side of the coil end portions 14 a and 14 b of the stator 12.
- the present invention is not limited to this, and may be disposed only on the outer diameter side of the coil end portions 14a and 14b, or may be disposed only on the inner diameter side of the coil end portions 14a and 14b. It is good as well.
- the dropping nozzle 52 of the varnish dropping device 50 can be moved in the vertical and horizontal directions with respect to the frame mold 36 by the moving mechanism 54.
- the present invention is not limited to this, and the dropping nozzle 52 may be movable only in the vertical direction with respect to the frame mold 36.
- the dropping nozzle 52 may be movable only in the vertical direction with respect to the frame mold 36.
- the dropping nozzle 52 may be fixed to the frame mold 36 so that it cannot be moved in the vertical direction.
- the induction coil 64 of the first heating device 60 and the hot air nozzle 70b of the second heating device 62 can be moved only in the horizontal direction with respect to the frame mold 36 by the moving mechanism 66. It is said.
- the present invention is not limited to this, and the induction coil 64 and the hot air nozzle 70b may be movable in both the horizontal direction and the vertical direction with respect to the frame mold 36.
- the hot air nozzle 70a of the second heating device 62 can be rotated with respect to the frame mold 36 by the moving mechanism 76 and can be moved in the horizontal direction.
- the present invention is not limited to this, and the hot air nozzle 70a may be movable only in the horizontal direction with respect to the frame mold 36.
- both the induction coil 64 of the first heating device 60 and the hot air nozzle 70b of the second heating device 62 are movable with respect to the frame mold 36 by the common moving mechanism 66. It is said.
- the present invention is not limited to this, and the induction coil 64 of the first heating device 60 and the hot air nozzle 70b of the second heating device 62 can be independently moved with respect to the frame 36. It is good as well.
- the dropping nozzle 52 of the varnish dropping device 50 is moved downward from above the stator 12 and moved into the dropping position by the moving mechanism 54 when moving from the retracted position to the dropping position. At the time of movement from the dropping position to the retracted position, it is moved upward from the dropping position.
- the present invention is not limited to this, and conversely, as shown in FIG. 8, when the dropping nozzle 52 is moved from the retracted position to the dropping position, it is moved upward from below the stator 12 to enter the dropping position. At the same time, it may be moved downward from the dropping position when moving from the dropping position to the retracted position.
- the first heating device 60 is moved by the moving mechanism 66 while the outer diameter grip ring 30 is rotatably held with respect to the frame mold 36 fixed to the ground. Between the first heating device 60 and the stator 12 supported by the outer diameter grip ring 30 between the inner side and the outer side of the cavity portion 20 of the stator core 16. Relative movement is possible so as to be arranged in any one of them.
- the present invention is not limited to this, and the first heating device 60 is fixed as a structure in which the first heating device 60 and the stator 12 supported by the outer diameter grip ring 30 are relatively moved.
- the outer diameter grip ring 30 and the stator 12 supported by the outer diameter grip ring 30 are moved by an induction mechanism at the induction heating position where the first heating device 60 is disposed in the cavity 20 and the first heating in the cavity 20. It is good also as what advances / retreats between the retracted positions where the apparatus 60 is not arrange
- the outer diameter gripping ring 30 and the stator 12 supported by the outer diameter gripping ring 30 are fixed to the cavity 20 by the moving mechanism 100 while the first heating device 60 is fixed.
- the first heating device 60 may be moved back and forth between the induction heating position where the first heating device 60 is disposed and the retracted position where the first heating device 60 is not disposed in the cavity 20. Also in this modification, it is possible to obtain the same effect as the above-described embodiment.
- FIGS. 9 (A), 10 (A), and 11 (A) show operation diagrams of the varnish impregnation device 10 when the stator is attached.
- FIGS. 9 (B), 10 (B), and 11 FIG. 9B is an operation diagram of the varnish impregnation apparatus 10 during pre-heating of the stator, and FIG. 9C, FIG. 10C, and FIG. Operation diagrams are shown respectively.
- stator 12 supported by the outer diameter grip ring 30 is advanced and retracted between the induction heating position and the retracted position by the moving mechanism 100, as shown in FIG.
- the stator 12 is moved downward from above the stator 12 in a state where the stator 12 is retracted to the retracted position by the moving mechanism 100 and enters the dropping position. It is good also as moving up from the dripping position at the time of a movement from a dripping position to a retracted position.
- the stator 12 when the dropping nozzle 52 of the varnish dropping device 50 is moved from the retracted position to the dropping position, the stator 12 is arranged at the induction heating position by the moving mechanism 100. In this state, it may be moved downward from above the stator 12 to enter the dropping position, and may be moved upward from the dropping position when moving from the dropping position to the retracted position.
- the stator 12 when the dropping nozzle 52 of the varnish dropping device 50 moves from the retracted position to the dropping position, the stator 12 is arranged at the induction heating position by the moving mechanism 100. In this state, it may be moved upward from below the stator 12 to enter the dropping position, and may be moved downward from the dropping position when moving from the dropping position to the retracted position.
- the dropping nozzle 52 of the varnish dropping device 50 is retracted from the dropping position by the moving mechanism 54 while the outer diameter grip ring 30 is rotatably held with respect to the frame mold 36 fixed to the ground.
- the present invention is not limited to this.
- the outer diameter holding device 50 is fixed while the varnish dropping device 50 is fixed.
- the stator 12 supported by the ring 30 may be moved forward and backward between the dropping position and the retracted position by a moving mechanism.
- the above-described embodiment is an inner rotor type rotating electrical machine including a stator 12 having a cylindrical hollow portion 20 at the center of the shaft and disposed opposite to the rotor in the radial direction via a predetermined air gap.
- the present invention is not limited to this, and if the stator includes a stator having a cylindrical hollow portion at the center of the shaft, the stator passes through a predetermined air gap radially inward with respect to the rotor.
- the present invention may be applied to an outer rotor type rotating electrical machine arranged opposite to each other.
- the stator (12) to which the stator coil (14) is mounted is supported on the outer diameter side of the stator (12) while the axial direction of the stator (12) is oriented horizontally, and the rotating device A support mechanism (30) that rotates the stator (12) by being rotationally driven by (40), and a coil end portion (14a, 14b) of the stator (12) that rotates while being supported by the support mechanism (30).
- a varnish impregnation device (10) comprising: a stator inner diameter side heating device (60) disposed in a hollow portion (20) vacant in the axial center of the stator and heating the stator (12) from the inner diameter side of the stator (12). .
- the stator (12) is heated from the inner diameter side of the stator (12) by the stator inner diameter side heating device (60). Can be heated. Further, since the stator (12) is held and supported on the outer diameter side of the stator (12) by the support mechanism (30), the varnish is prevented from adhering to the support mechanism (30) of the stator (12). be able to.
- the stator inner diameter side heating device (60) and the stator (12) supported by the support mechanism (30) include: A varnish impregnation device (10) that is relatively movable so that the stator inner diameter side heating device (60) is disposed either on the inner side or the outer side of the hollow portion (20).
- stator inner diameter side heating device (60) when the stator (12) is heated by the stator inner diameter side heating device (60), the stator inner diameter side heating device (60) is placed inside the cavity (20) of the stator core (16). Since the stator inner diameter side heating device (60) can be disposed outside the cavity (20) of the stator core (16) during the varnish impregnation by the varnish dropping device (50), the varnish dropping device (50) It is possible to prevent the varnish from adhering to the stator inner diameter side heating device (60) after impregnation with the varnish.
- stator inner diameter side heating apparatus (60) can be moved back and forth between the inner side and the outer side of the cavity (20) ( 10).
- the stator (12) supported by the support mechanism (30) is inserted into the stator inner diameter side heating device (60) in the cavity (20).
- a varnish impregnation device (10) capable of advancing and retracting between a heating position where the heater is disposed and a retracted position where the stator inner diameter side heating device (60) is not disposed in the hollow portion (20).
- the varnish dropping device (50) is the coil end portion (14a, 14b) of the stator (12) supported by the support mechanism (30).
- a varnish impregnation device (10) capable of moving back and forth between a nearby dropping position and a retracted position.
- the support mechanism (30) is configured to apply the varnish dropping device by the varnish dropping device (50) and the stator inner diameter side. Varnish impregnation device (10) in the same position as when the stator is heated by the heating device (60).
- the stator inner diameter side heating device (60) includes an induction coil (64) for induction heating the stator (12). Varnish impregnation device (10).
- heating from the inner diameter side of the stator (12) using the stator inner diameter side heating device (60) can be realized by induction heating.
- the varnish dropped onto the coil end portions (14a, 14b) can be cured by heating.
- the coil end heating device (62) blows hot air toward an outer surface of the coil end portion (14a, 14b) to thereby generate the coil end.
- the support mechanism (30) protrudes outward in a radial direction provided on the stator core (16).
- Both varnishes are dropped by the varnish dropping device (50) toward the coil end portions (14a, 14b) of the stator (12) that rotates as the support mechanism (30) is rotated by the rotating device (40).
- Varnish dropping step and after the varnish dropping in the varnish dropping step, the stator (12) is held on the outer diameter side of the stator (12) by the support mechanism (30), and the axial direction is horizontally oriented In the state where the stator inner diameter side heating device (60) is disposed in the hollow portion (20), the varnish dropped on the coil end portions (14a, 14b) is heated in the stator inner diameter side.
- a varnish impregnation method comprising: a heat curing step of heat curing with an apparatus (60).
- the stator (12) is heated from the inner diameter side of the stator (12) by the stator inner diameter side heating device (60) during the preheating of the stator (12) and the heat curing of the varnish. Therefore, the stator (12) can be efficiently and effectively heated. Further, since the stator (12) is held and supported on the outer diameter side of the stator (12) by the support mechanism (30), the varnish is prevented from adhering to the support mechanism (30) of the stator (12). be able to.
- the support mechanism (30) is the same when the varnish is dropped by the varnish dropping device (50) and when the stator is heated by the stator inner diameter side heating device (60). Varnish impregnation method in position.
- the preliminary heating step is performed in the vicinity of the coil end portion (14a, 14b) of the stator (12) supported by the support mechanism (30).
- the coil end portion (14a, 14b) is heated by the coil end portion heating device (62) disposed in the varnish dripping step, and the varnish dropping step is supported by the stator (12) supported by the support mechanism (30).
- the varnish toward the coil end part (14a, 14b) is performed in a state where the coil end part heating device (62) is retracted from the vicinity of the coil end part (14a, 14b), and the heating is performed.
- the curing step is performed by the stator inner diameter side heating device (60) by the stator inner diameter side heating device (60) and the coil end portion heating device (62).
- the coil end heating device (62) disposed in the hollow portion (20) and dropped in the coil end portion (14a, 14b) in a state of being disposed in the vicinity of the coil end portion (14a, 14b).
- a varnish impregnation method for performing heat curing of the varnish is performed by the stator inner diameter side heating device (60) by the stator inner diameter side heating device (60) and the coil end portion heating device (62).
- the stator (12) can be preheated and the varnish can be heated and cured using the coil end portion heating device (62) together with the stator inner diameter side heating device (60).
- both of the preliminary heating step and the heat curing step are rotations of the support mechanism (30) by the rotating device (40).
- a varnish impregnation method for heating the stator (12) rotating with driving is
- the stator inner diameter side heating device (60) in the preliminary heating step, is disposed in the hollow portion (22), and the coil end portion heating device (62 ) Is disposed in the vicinity of the coil end portions (14a, 14b), and the stator (12) is heated while the varnish dropping device (50) is retracted from the vicinity of the coil end portions (14a, 14b).
- the stator inner diameter side heating device (60) is disposed in the hollow portion (20), and the coil end portion heating device (62) is located in the vicinity of the coil end portions (14a, 14b).
- Varnish impregnation apparatus 12 Stator 14 Stator coil 14a, 14b Coil end part 16 Stator core 20 Cavity part 24 Fixing ear
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Abstract
Description
12 ステータ
14 ステータコイル
14a,14b コイルエンド部
16 ステータコア
20 空洞部
24 固定用耳部
30 支持機構(外径把持リング)
32 リング部
34 クランプ部
36 枠型
40 回転モータ
50 ワニス滴下装置
52 滴下ノズル
54,66,76 移動機構
60 第1の加熱装置
62 第2の加熱装置
64 誘導コイル
70 熱風ノズル
72 カバー
Claims (19)
- スロットが径方向内側へ向けて開口してなるステータコアに装着されたステータコイルにワニスを含浸させるワニス含浸装置であって、
前記ステータコアに前記ステータコイルが装着されたステータを、該ステータの外径側で把持しつつ該ステータの軸方向を水平方向に向けた状態で支持すると共に、回転装置に回転駆動されることによって該ステータを回転させる支持機構と、
前記支持機構により支持されつつ回転する前記ステータのコイルエンド部に向けてワニスを滴下するワニス滴下装置と、
前記支持機構により支持された前記ステータの前記ステータコアの軸中心に空いた空洞部に配置され、該ステータを該ステータの内径側から加熱するステータ内径側加熱装置と、
を備えることを特徴とするワニス含浸装置。 - 前記支持機構は、前記ステータコアの外周側の軸方向両端面の間に配置されることを特徴とする請求項1記載のワニス含浸装置。
- 前記ステータ内径側加熱装置と前記支持機構により支持された前記ステータとは、前記ステータ内径側加熱装置が前記空洞部の内側と外側との何れかに配置されるように相対移動可能であることを特徴とする請求項1又は2記載のワニス含浸装置。
- 前記ステータ内径側加熱装置が、前記空洞部の内側と外側との間で進退可能であることを特徴とする請求項3記載のワニス含浸装置。
- 前記支持機構により支持された前記ステータが、前記空洞部に前記ステータ内径側加熱装置が配置される加熱位置と前記空洞部に前記ステータ内径側加熱装置が配置されない退避位置との間で進退可能であることを特徴とする請求項3記載のワニス含浸装置。
- 前記ワニス滴下装置と前記支持機構により支持された前記ステータとは、前記ワニス滴下装置が該ステータの前記コイルエンド部近傍の滴下位置と退避位置との何れかに配置されるように相対移動可能であることを特徴とする請求項1乃至5の何れか一項記載のワニス含浸装置。
- 前記ワニス滴下装置が、前記支持機構により支持された前記ステータの前記コイルエンド部近傍の滴下位置と退避位置との間で進退可能であることを特徴とする請求項6記載のワニス含浸装置。
- 前記ワニス滴下装置の退避位置は、前記支持機構により支持された前記ステータの下方であることを特徴とする請求項7記載のワニス含浸装置。
- 前記支持機構は、前記ワニス滴下装置によるワニス滴下時と前記ステータ内径側加熱装置によるステータ加熱時とで同じ位置にあることを特徴とする請求項1乃至8の何れか一項記載のワニス含浸装置。
- 前記ステータ内径側加熱装置は、前記ステータを誘導加熱する誘導コイルを有することを特徴とする請求項1乃至9の何れか一項記載のワニス含浸装置。
- 前記支持機構により支持された前記ステータの前記コイルエンド部近傍に配置され、該コイルエンド部を加熱するコイルエンド部加熱装置を備えることを特徴とする請求項1乃至10の何れか一項記載のワニス含浸装置。
- 前記コイルエンド部加熱装置は、前記コイルエンド部の外面に向けて熱風を吹き付けることにより該コイルエンド部を加熱することを特徴とする請求項11記載のワニス含浸装置。
- 前記支持機構は、前記ステータコアに設けられた径方向外側に向けて突出する固定用耳部の両端を挟むことにより前記ステータを支持することを特徴とする請求項1乃至12の何れか一項記載のワニス含浸装置。
- スロットが径方向内側へ向けて開口してなるステータコアに装着されたステータコイルにワニスを含浸させるワニス含浸方法であって、
支持機構により外径側で把持されつつ軸方向を水平方向に向けた状態で支持された、前記ステータコアに前記ステータコイルが装着されたステータを、該ステータコアの軸中心に空いた空洞部に配置されたステータ内径側加熱装置により、該ステータの内径側から加熱する予備加熱工程と、
前記予備加熱工程における加熱後、前記ステータ内径側加熱装置が前記空洞部から退避された状態で、前記支持機構により外径側で把持されつつ軸方向を水平方向に向けた状態で支持されると共に、回転装置による前記支持機構の回転駆動に伴って回転する前記ステータのコイルエンド部に向けて、ワニス滴下装置によりワニスを滴下するワニス滴下工程と、
前記ワニス滴下工程におけるワニス滴下後、前記支持機構により前記ステータが該ステータの外径側で把持されつつ軸方向を水平方向に向けた状態で支持され、かつ、該ステータ内径側加熱装置が前記空洞部に配置された状態で、前記コイルエンド部に滴下されたワニスを、前記ステータ内径側加熱装置により加熱硬化させる加熱硬化工程と、
を備えることを特徴とするワニス含浸方法。 - 前記支持機構は、前記ワニス滴下装置によるワニス滴下時と前記ステータ内径側加熱装置によるステータ加熱時とで同じ位置にあることを特徴とする請求項14記載のワニス含浸方法。
- 前記予備加熱工程は、前記支持機構により支持された前記ステータの前記コイルエンド部近傍に配置されたコイルエンド部加熱装置により、該コイルエンド部を加熱する工程を含み、
前記ワニス滴下工程は、前記支持機構により支持された前記ステータの前記コイルエンド部に向けたワニスの滴下を、前記コイルエンド部加熱装置が該コイルエンド部近傍から退避された状態で実行し、
前記加熱硬化工程は、前記ステータ内径側加熱装置及び前記コイルエンド部加熱装置により、前記ステータ内径側加熱装置が前記空洞部に配置されかつ前記コイルエンド部加熱装置が前記コイルエンド部近傍に配置された状態で、前記コイルエンド部に滴下されたワニスの加熱硬化を実行することを特徴とする請求項14又は15記載のワニス含浸方法。 - 前記ワニス滴下工程は、前記ステータ内径側加熱装置が前記空洞部から退避され、かつ、前記コイルエンド部加熱装置が前記コイルエンド部近傍から退避されつつ、前記ワニス滴下装置が該コイルエンド部近傍に配置された状態で、前記コイルエンド部に向けてワニスを滴下することを特徴とする請求項16記載のワニス含浸方法。
- 前記予備加熱工程は、前記ステータ内径側加熱装置が前記空洞部に配置され、かつ、前記コイルエンド部加熱装置が前記コイルエンド部近傍に配置されつつ、前記ワニス滴下装置が該コイルエンド部近傍から退避された状態で、前記ステータを加熱し、
前記加熱硬化工程は、前記ステータ内径側加熱装置が前記空洞部に配置され、かつ、前記コイルエンド部加熱装置が前記コイルエンド部近傍に配置されつつ、前記ワニス滴下装置が該コイルエンド部近傍から退避された状態で、前記コイルエンド部に滴下されたワニスを加熱硬化させることを特徴とする請求項17記載のワニス含浸方法。 - 前記予備加熱工程及び前記加熱硬化工程は共に、前記回転装置による前記支持機構の回転駆動に伴って回転する前記ステータを加熱することを特徴とする請求項14乃至18の何れか一項記載のワニス含浸方法。
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