JP4820386B2 - Stator manufacturing equipment - Google Patents

Description

  The present invention relates to a stator manufacturing apparatus that manufactures a stator that constitutes a rotating electrical machine such as a motor or a generator, and more specifically, a stator manufacturing apparatus that insulates a connection portion of a coil that constitutes the stator with an insulating powder. About.

  2. Description of the Related Art Conventionally, a stator of a rotating electrical machine such as an electric motor is provided with a split core in which a coil is wound around an insulator in which an iron core is stored. The terminal of the part and the end of the coil are connected via a connection terminal.

  In such a stator, insulation treatment such as varnish impregnation treatment or resin molding is performed in order to achieve electrical insulation at the joint portion between the end of the coil and the connection terminal.

  For example, in the prior art disclosed in Patent Document 1, a powder varnish is filled in one space of a fluid immersion tank partitioned by a porous plate, and compressed air is supplied from the outside into the other space. An air supply pipe is provided. Then, after heating the wound iron core to a predetermined temperature, it is immersed in the powder varnish, and the compressed air supplied from the air supply pipe is passed through the porous plate to the powder varnish side. Insulating treatment is carried out by allowing the powder varnish to float in the fluid immersion bath and to adhere to the windings by flowing.

JP-A-5-83905

  However, the connection part between the coil and the connection terminal in the stator is generally configured in a complicated and complicated shape, and the powder varnish is stably fed into such a connection part to ensure the connection. Difficult to attach. As a result, in the above-described conventional technology, there is a concern that the insulation process cannot be sufficiently performed on the iron core including the windings and the desired insulation performance cannot be obtained.

  Under such a technical environment, in recent years, it has been desired to efficiently perform insulation treatment with a powder varnish and reduce the amount of the powder varnish used.

  The present invention has been made in consideration of the above-mentioned problems, and it is possible to reliably and stably adhere insulating powder to a connection portion of a coil in a stator so as to improve insulation, and the insulating powder. An object of the present invention is to provide a stator manufacturing apparatus capable of reducing the amount of use of the stator.

  In order to achieve the above object, the present invention provides a container for containing insulating powder, a perforated plate provided in the container, and compressed air through the perforated plate provided below the perforated plate. A stator manufacturing apparatus for disposing a stator having a supply nozzle to be supplied to a container and having a core around which a coil is wound in the container, and insulating a connection portion of the coil by the insulating powder; The container has an annular inner space, and a plurality of injection nozzles for injecting the compressed air into the container and rotating the insulating powder in the container are arranged at equal intervals. It is characterized by.

  According to the present invention, when the stator is accommodated in the container, the compressed air from the supply nozzle blows and floats the insulating powder in the container through the perforated plate, and the compressed air injected from the plurality of injection nozzles The insulating powder can be stably swirled and flowed in the container, so that the insulating powder can be reliably and stably applied to the connection part of the coil having a complicated structure in the stator. It can be attached with high density. As a result, it is possible to improve the insulation at the connection site of the coil.

  In addition, the volume of the container can be reduced as compared with the case where no annular internal space is provided in the container, so that the amount of insulating powder used can be reduced and the insulating powder can be reduced. As a result, it is possible to sufficiently insulate the connection portion of the coil.

  Furthermore, the injection nozzle can freely adjust the flow direction of the compressed air in the container according to the shape of the stator, and the like by providing a tip portion that can inject compressed air with respect to the container. it can. Therefore, the insulating powder can surely enter and adhere to the connection part of the coil regardless of the shape of the stator, and a high-density insulating film can be formed on the connection part.

  Furthermore, when the stator is accommodated in the container, the injection nozzle is positioned toward the connection part of the coil to directly inject the insulating powder from the injection nozzle to the connection part. Therefore, it becomes possible to adhere the insulating powder to the connection part more reliably.

  According to the present invention, the following effects can be obtained.

  That is, by providing a plurality of injection nozzles capable of injecting compressed air in a container having an annular inner space, the insulating powder suspended by the compressed air from the supply nozzle after accommodating the stator in the container, It can be made to flow so that it may turn in the said container with the compressed air from an injection nozzle. Therefore, the insulating powder can be reliably and densely attached to the connection portion of the coil in the stator, and the insulation at the connection portion can be improved. Moreover, it becomes possible to reduce the usage-amount of this insulating powder by providing a cyclic | annular internal space in a container.

  A preferred embodiment of a stator manufacturing apparatus according to the present invention will be described in detail below with reference to the accompanying drawings.

  First, the stator 12 manufactured by the stator manufacturing apparatus 10 according to the first embodiment of the present invention will be briefly described with reference to FIGS. 1 and 2.

  The stator 12 is a three-phase Y-type stator, and includes a hollow casing 14, three-phase input terminals U, V, and W provided in the casing 14, and a plurality of pieces accommodated inside the casing 14. Divided core (core) 16. A coil 20 is wound around the split core 16 via an insulator 18 made of a resin material, and a plurality of split cores 16 are annularly assembled along the inner peripheral surface of the casing 14. The stator core 24 is configured by being connected to each other via the terminal 22a.

  Specifically, one end of the coil 20 on the inner peripheral side of the stator 12 is electrically connected to the coil 20 of the adjacent split core 16 via the first terminal 22 a provided on the split core 16. On the other hand, the other end of the coil 20 on the outer peripheral side is electrically connected via an annular input line bus bar 25 connected to one of the input terminals U, V, and W and the second terminal 22b. ing. The first and second terminals 22a and 22b are provided in connecting annular grooves 26a and 26b provided on the inner peripheral side and the outer peripheral side of the split core 16, respectively.

  Next, the stator manufacturing apparatus 10 for manufacturing the stator 12 described above will be described with reference to FIGS.

  The stator manufacturing apparatus 10 includes a base plate 28 and a cylindrical body 29 provided on the base plate 28. The base plate 28 and the cylindrical body 29 form a housing (container) 30 in which the stator core 24 constituting the stator 12 is accommodated.

  The base plate 28 is formed, for example, from a resin material with a constant thickness, and is formed in a substantially rectangular shape. And the one end part of the resin cylindrical body 29 is airtightly connected with the upper surface of the baseplate 28, for example with an adhesive agent.

  Inside the housing 30, a porous plate (perforated plate) 32 having a plurality of openings and a cylindrical tube (hollow part) 34 provided at the center of the housing 30 are provided. An air supply nozzle 36 and a plurality of air injection nozzles (injection nozzles) 40 a to 40 d for injecting compressed air into the housing 30 to flow the insulating powder 38 are mounted on the side surfaces. Actually, the air supply nozzle 36 is in the vicinity of the base plate 28 and is airtightly fitted into a hole 42 formed in the cylindrical body 29.

  The air supply nozzle 36 is disposed so that one end thereof is directed toward the center of the housing 30, and a tube 44 a connected to an air supply source (not shown) is connected to the other end. That is, the compressed air supplied from the air supply source is supplied to the inside of the housing 30 through the tube 44 a and the air supply nozzle 36.

  The porous plate 32 is formed of an annular thin plate and is laid between the outer peripheral wall of the cylindrical body 34 and the inner peripheral wall of the cylindrical body 29. As can be easily understood from FIG. 4, the porous plate 32 is provided substantially parallel to the base plate 28. The porous plate 32 is formed of a porous material having innumerable apertures therein, and the apertures are set to an average pore diameter of 10 μm to 100 μm, for example, and the pore diameter is an insulating powder accommodated in the housing 30. The particle size of the body 38 is smaller.

  Further, the inner peripheral surface forming the hole 32a provided in the central portion of the annular porous plate 32 is adhered and fixed to the outer peripheral surface of the cylindrical body 34, and the annular outer peripheral surface of the porous plate 32 is The cylindrical body 29 is fixed in close contact with the inner peripheral surface. Thereby, the compressed air supplied through the tube 44a from the supply chamber 46 formed by the porous plate 32, the cylindrical body 34, and the cylindrical body 29 does not leak to the outside.

  Further, in the housing 30, an accommodation chamber 48 (see FIG. 4) in which the stator 12 and the insulating powder 38 are accommodated is formed above the porous plate 32. The storage chamber 48 is filled with a predetermined amount of insulating powder 38 such as an insulating varnish. For example, the amount of the insulating powder 38 reaching the upper side of the air injection nozzles 40a to 40d from the upper surface of the porous plate 32 in the accommodation chamber 48 is preferable. Therefore, when the stator core 24 constituting the stator 12 is accommodated in the accommodation chamber 48, the stator core 24 is immersed in the insulating powder 38.

  As shown in FIG. 3, four air injection nozzles 40 a to 40 d are provided at equal intervals along the circumferential direction substantially parallel to the tangential direction with respect to the outer peripheral surface of the housing 30. In this case, the air injection nozzles 40 a to 40 d are positioned on a horizontal plane that is orthogonal to the axis of the housing 30 and substantially parallel to the base plate 28 and the porous plate 32, and their tip portions are located inside the housing 30 in the stator core. When 24 is accommodated, the second terminal 22b and the end of the coil 20 face the connecting annular groove 26b (see FIG. 4). In other words, the tip portions of the air injection nozzles 40 a to 40 d face the connecting annular groove 26 b of the stator core 24 that constitutes the stator 12 positioned in the housing 30. For this reason, the air injection nozzles 40 a to 40 d are arranged so as to have substantially the same height in the axial direction of the connecting annular groove 26 b and the stator core 24.

  The air injection nozzles 40a to 40d include a main body 50 formed in a cylindrical shape, a plug 52 connected to one end of the main body 50, and a cap 54 attached to the other end of the main body 50. The main body 50 is inserted through a mounting hole 56 opened in the side surface of the housing 30.

  A tube 44b connected to an air supply source (not shown) is connected to the plug 52.

  Like the porous plate 32, the cap 54 is made of a porous material having innumerable apertures, and is formed in a disc shape so as to close the other end of the main body 50. Similar to the porous plate 32, the aperture is set to have an average pore diameter of 10 μm to 100 μm, for example, and is smaller than the particle diameter of the insulating powder 38.

  As described above, by forming the cap 54 from the porous material, even when the air injection nozzles 40a to 40d are covered with the filled insulating powder 38, the insulating powder 38 is formed into the air injection nozzles 40a to 40d. It is prevented from entering the interior of the.

  Therefore, compressed air supplied from an air supply source (not shown) is injected from the opening of the cap 54 into the housing 30 through the plug 52 and the main body 50. At this time, the compressed air to be injected is injected from the plurality of air injection nozzles 40 a to 40 d directed in a tangential direction with respect to the outer peripheral surface of the housing 30, whereby the compressed air is rotated clockwise in the housing 30. Circulate so as to turn in the direction of arrow B in FIG.

  The stator manufacturing apparatus 10 according to the first embodiment of the present invention is basically configured as described above. Next, the operation, operation, and effect thereof will be described. Here, the stator core 24 constituting the stator 12 is set in the stator manufacturing apparatus 10, and the insulating powder 38 is applied to the connection portions of the divided cores 16 with the first and second terminals 22 a and 22 b of the coil 20. The case where the insulation is made by attaching is demonstrated.

  First, as shown in FIG. 4, the connecting annular grooves 26 a, 26 b of the stator core 24 are in the receiving chamber 48 of the housing 30 in which the insulating powder 38 is stored, and the lower side of the stator core 24 is the insulating powder 38. So as to be immersed in. At this time, the stator core 24 is held in the accommodation chamber 48 by holding means (not shown) provided in the cylindrical body 34. The stator core 24 is in a state of being heated to a predetermined temperature in advance.

  Next, by driving an air supply source (not shown) and supplying compressed air to the air supply nozzle 36 through the tube 44a, the compressed air supplied from the air supply nozzle 36 to the supply chamber 46 of the housing 30 becomes porous. It flows to the upper side (in the direction of arrow A) of the housing 30 through the hole in the material plate 32. As a result, the insulating powder 38 accommodated on the upper surface side (arrow A direction) of the porous plate 32 is blown upward by the compressed air and floats in the accommodation chamber 48.

  Specifically, since the compressed air introduced into the lower portion of the housing 30 flows upward (in the direction of arrow A) along the axial direction of the housing 30 through the opening of the porous plate 32, the compressed air is insulated by the compressed air. The powder 38 flows and floats in a direction away from the porous plate 32. As a result, the insulating powder 38 that has soaked about half of the height of the stator core 24 floats, and the stator core 24 is covered with the insulating powder 38.

  At the same time, as shown in FIG. 5, the compressed air supplied to the air injection nozzles 40 a to 40 d is injected into the housing 30 and swivels clockwise (in the direction of arrow B). The insulating powder 38 blown up by the compressed air is swirled inside the storage chamber 48. That is, the insulating powder 38 flows while rotating clockwise (in the direction of arrow B) about the cylindrical body 34 by the injection of compressed air.

  As a result, the insulating powder 38 flows along the annularly connected divided cores 16 and is preferably diffused by the compressed air, so that the insulating powder 38 enters the connecting annular grooves 26a and 26b of the stator core 24. Thus, the first and second terminals 22a and 22b are securely attached to the connection portion of the coil 20 connected to the first and second terminals 22a and 22b. In other words, the insulating powder 38 can be fed and attached to the connecting portion of the coil 20 having a complicated shape in the connecting annular grooves 26a and 26b.

  Finally, the insulating powder 38 attached to the connection portion of the coil 20 is melted by the heat of the stator core 24 heated in advance, and the insulating powder 38 is in close contact so as to cover the surface of the coil 20. Next, the stator core 24 is taken out from the storage chamber 48 and further heated by a heating device (not shown), whereby the insulating powder 38 is cured and an insulating film is generated on the surface. Thereby, the connection part of the coil 20 in the stator core 24 is covered with the insulating powder 38 for insulation.

  As described above, in the first embodiment, the air supply nozzle 36 is provided in the housing 30 in which the insulating powder 38 is accommodated, and the compressed air supplied from the air supply nozzle 36 is supplied to the housing through the porous plate 32. The insulating powder 38 is floated by being circulated into the storage chamber 48, and at the same time, the compressed air is injected from the plurality of air injection nozzles 40 a to 40 d to rotate the insulating powder 38 in the storage chamber 48. By making it, fluidity | liquidity can be improved.

  As a result, the insulating powder 38 that is swirling and flowing is reliably fed into the connecting annular grooves 26a and 26b in the stator 12, and the connection portion between the end portion of the coil 20 and the first and second terminals 22a and 22b. It becomes possible to make it adhere stably. As a result, it is possible to reliably and stably insulate the connecting portion of the coil 20 with the insulating powder 38, and to generate a reliable and high-density insulating film.

  Further, since the hollow cylindrical body 34 is provided in the central portion of the housing 30, the compressed air can be circulated in the housing chamber 48 of the housing 30 so as to turn more reliably and efficiently. As a result, the volume of the storage chamber 48 can be reduced as compared with the case where the cylindrical body 34 is not provided, so that the amount of the insulating powder 38 used can be reduced.

  And since the front-end | tip part of the air injection nozzles 40a-40d is arrange | positioned in the position which faces the connection annular groove 26b of the stator core 24, ie, facing, compressed air injected from the said air injection nozzles 40a-40d. Thus, the insulating powder 38 can be reliably and efficiently supplied to the connecting annular groove 26b.

  Next, a stator manufacturing apparatus 100 according to a second embodiment is shown in FIGS. The same components as those of the stator manufacturing apparatus 10 according to the first embodiment described above are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the stator manufacturing apparatus 100 according to the second embodiment, the plurality of air injection nozzles 102 a to 102 d are provided so as to be displaceable with respect to the side surface of the housing 30, according to the first embodiment. This is different from the stator manufacturing apparatus 10.

  For example, four air injection nozzles 102 a to 102 d are provided at equal intervals in the circumferential direction with respect to the side surface of the housing 30, and are displaced by an annular support member 104 provided in the mounting hole 56 of the housing 30. It is supported freely.

  In this case, when the stator core 24 constituting the stator 12 is accommodated in the housing 30, the air injection nozzles 102a to 102d are inserted into the connecting annular groove 26b in which the end portions of the second terminal 22b and the coil 20 are accommodated and connected. It arrange | positions in the position which faces (refer FIG. 7). In other words, the air injection nozzles 102 a to 102 d are arranged so as to have substantially the same height as the connecting annular groove 26 b of the stator core 24 along the axial direction of the stator core 24.

  The air injection nozzles 102 a to 102 d include a cylindrical main body 50, a plug 52 connected to one end of the main body 50, and a cap 54 attached to the other end of the main body 50. And an adapter 106 that is provided in the main body 50 and is rotatably supported by the support member 104. The support member 104 has a concave portion whose inner peripheral surface is curved. On the other hand, the adapter 106 is formed in a spherical shape so as to fit the concave portion of the support member 104. That is, the air injection nozzles 102a to 102d are rotatably supported by a predetermined angle θ with respect to the housing 30 via the adapter 106 and the support member 104 (see FIG. 8). Specifically, the air injection nozzles 102a to 102d are clockwise / counterclockwise around the center portion D of the adapter 106 from the state where the axis C extends toward the center of the housing 30 (the solid line shape in FIG. 9). Each is provided so as to be freely rotatable (in FIG. 8, a two-dot chain line shape).

  The air injection nozzles 102a to 102d are rotatably supported only on a horizontal plane substantially parallel to the porous plate 32 and the base plate 28 by a regulating means (not shown).

  Then, the stator core 24 of the stator 12 is set inside the housing 30, the plurality of air injection nozzles 102 a to 102 d are rotated at an arbitrary angle on a horizontal plane, and fixed at a preset angle by a lock unit (not shown). At this time, the plurality of air injection nozzles 102a to 102d are adjusted in position so that the compressed air can be circulated in the same direction in the storage chamber 48, and the rotation angles around the adapter 106 are respectively set. It is fixed after being rotated to be substantially the same.

  Next, the compressed air is supplied from the air supply source (not shown) to the air supply nozzle 36, and at the same time, the compressed air is supplied to the air injection nozzles 102a to 102d. As a result, the insulating powder 38 floating in the housing chamber 48 of the housing 30 flows so as to be swung by the compressed air jetted from the air jet nozzles 102a to 102d set at an arbitrary angle, and is connected to the stator 12. It can be made to enter the inside of the annular grooves 26a and 26b and adhere to the connection portion between the end of the coil 20 and the first and second terminals 22a and 22b.

  As described above, in the second embodiment, since the direction of the plurality of air injection nozzles 102a to 102d is rotatable with respect to the housing 30, the compressed air discharged from the air injection nozzles 102a to 102d is used. The jetting direction of can be adjusted freely. As a result, it is possible to easily and freely adjust the flow direction of the swirling flow generated in the housing 30 from the compressed air.

  That is, since the insulating powder 38 in the housing 30 can be caused to flow while being swung in a desired direction by the single stator manufacturing apparatus 100, for example, the end portion of the coil 20 in the stator 12 and the first and second portions. By adjusting the flow direction of the compressed air in accordance with the connection portions with the terminals 22a and 22b, it becomes possible to adhere the insulating powder 38 more reliably and stably and improve the insulation.

  In addition, the stator manufacturing apparatus according to the present invention is not limited to the above-described embodiment, and it is needless to say that various configurations can be adopted without departing from the gist of the present invention.

It is a top view of the stator manufactured by the stator manufacturing apparatus which concerns on the 1st Embodiment of this invention. FIG. 2 is an enlarged plan view showing the vicinity of a split core in the stator of FIG. 1. It is a cross-sectional view of a stator manufacturing apparatus. It is a longitudinal cross-sectional view which shows the state which set the stator core which comprises a stator with respect to the stator manufacturing apparatus shown in FIG. 3, and supplied compressed air and made the insulating powder flow. It is a cross-sectional view showing the stator manufacturing apparatus of FIG. It is a cross-sectional view which shows the stator manufacturing apparatus which concerns on the 2nd Embodiment of this invention. FIG. 7 is a longitudinal sectional view showing a state in which a stator core constituting the stator is set in the stator manufacturing apparatus shown in FIG. 6 and compressed air is supplied to flow insulating powder. It is an expanded sectional view which shows the state which moved the air injection nozzle shown in FIG. It is a cross-sectional view of the stator manufacturing apparatus of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10,100 ... Stator manufacturing apparatus 12 ... Stator 16 ... Split core 20 ... Coil 22a ... 1st terminal 22b ... 2nd terminal 24 ... Stator core 30 ... Housing 32 ... Porous plate 34 ... Cylindrical body 36 ... Air supply nozzle 38 ... Insulation Powder 40a-40d, 102a-102d ... Air injection nozzle 46 ... Supply chamber 48 ... Storage chamber 50 ... Main body 52 ... Plug 54 ... Cap 104 ... Support member 106 ... Adapter

Claims (3)

A container for containing insulating powder; a porous plate provided inside the container; and a supply nozzle provided below the porous plate for supplying compressed air to the container through the porous plate; A stator manufacturing apparatus for disposing a stator having a wound core in the container and insulating a connection portion of the coil with the insulating powder,
The container has an annular inner space, and a plurality of injection nozzles for spraying the compressed air and swirling the insulating powder in the container are arranged at equal intervals. A stator manufacturing apparatus. The stator manufacturing apparatus according to claim 1,
The stator manufacturing apparatus according to claim 1, wherein a tip portion capable of injecting the compressed air is provided to be displaceable with respect to the container. In the stator manufacturing apparatus according to claim 1 or 2,
The injection nozzle is configured such that a tip portion thereof faces a connection portion of the coil when the stator is accommodated in the container.

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