JP2010131774A - Device and method for cooling stator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device and a method for cooling a stator, wherein the stator after mold molding from resin is cooled in a short time. <P>SOLUTION: The device 10 for cooling the stator 20 after mold molding from the resin is provided with: a mist sprayer 11 for spraying mist; a blower fan 12 for blowing mist sprayed from the mist sprayer 11 to the surface of the stator 20; and a blower nozzle 16 for blowing wind of preventing the penetration of mist into the inner circumferential part of the stator 20 to the surrounding part in the stator 20. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a stator cooling apparatus and method for cooling a molded stator. More particularly, the present invention relates to a stator cooling apparatus and method for cooling a stator using mist.

  2. Description of the Related Art Conventionally, for a stator provided in a motor, resin molding is performed in order to ensure insulation and strength. In this molding, the stator has a high temperature (about 150 ° C.). Therefore, it is necessary to cool the stator to a temperature (about 50 ° C.) at which the work can be performed in the next process after molding. However, at present, cooling by air blowing is performed, and the time required for cooling is very long and the production efficiency is poor. The cooling by air blowing is performed because the stator is formed by laminating electromagnetic steel plates, and thus cooling (water cooling) using water may cause rust. And in order to improve production efficiency, shortening of the cooling time of a stator is desired.

Here, as a technique for shortening the cooling time in the stator molding process, for example, there is one described in Patent Document 1. In the technology disclosed herein, the heat dissipation device comprising an infrared heater promotes the curing of the thermosetting resin, and the entire mold is not heated without increasing the temperature of the mold, so that the stator mold The cooling time in the molding process is shortened.
JP 2007-216612 A

  However, in the above-described conventional technique, the entire apparatus is not heated, so that the cooling time of the apparatus itself is shortened, but there is a problem that the time for cooling the stator after molding is still long. This is because the stator itself (mold resin itself) is not actively cooled.

  Accordingly, the present invention has been made to solve the above-described problems, and it is an object of the present invention to provide a stator cooling apparatus and method capable of cooling a stator after being molded with a resin in a short time. To do.

  The present invention, which has been made to solve the above-mentioned problems, is a stator cooling device for cooling a stator after being molded with a resin. A mist sprayer for spraying mist, and a mist sprayed from the mist sprayer for the stator. A blowing fan for sending to the surface, and a blowing nozzle for sending a wind to the stator inner peripheral portion so that the outer periphery of the front end is in close contact with the inner peripheral surface of the stator and prevents the mist from entering the inner peripheral portion of the stator It is characterized by having.

  In this stator cooling device, the mist sprayed from the mist sprayer is sent to the surface of the stator by the blower fan. Thereby, mist adheres uniformly on the surface of the stator and vaporizes. At this time, the stator after molding can be uniformly and efficiently cooled by the heat of vaporization of the mist. As a result, the cooling time of the stator after molding can be shortened.

  Here, there is a possibility that mist may enter the inner peripheral portion of the stator. And since the inner peripheral part of a stator is hardly molded for the performance improvement of a stator, an electromagnetic steel plate may be exposed. For this reason, if the mist enters the inner peripheral portion of the stator, there is a possibility that moisture enters the laminated electromagnetic steel sheet and generates rust.

  However, this stator cooling device is provided with a blowing nozzle that sends the wind to the stator inner peripheral portion, with the outer periphery of the tip portion being in close contact with the inner peripheral surface of the stator and preventing mist from entering the stator inner peripheral portion. For this reason, the invasion of mist to the inner peripheral portion of the stator is prevented by the wind flow sent from the blow nozzle. Moreover, since the outer periphery of the front end of the blow nozzle is in close contact with the inner peripheral surface of the stator, it is possible to prevent mist from being wound from the mounting portion of the blow nozzle to the inner peripheral portion of the stator. By these things, since it is avoided that mist adheres to an inner peripheral part of a stator, generation | occurrence | production of rust of an electromagnetic steel plate can be prevented.

  Thus, according to the stator cooling device of the present invention, the stator after molding can be cooled in a short time without rusting using mist. Thereby, production efficiency can be improved without deteriorating the performance of the stator.

  Here, the blower nozzle is inserted into the stator inner periphery in order to prevent the mist from being mixed into the stator inner periphery, but the blower nozzle may be shifted and inserted. If the blower nozzle is displaced and inserted, the outer peripheral surface of the blower nozzle and the inner peripheral surface of the stator are not in close contact with each other, and mist is caught from the mounting portion of the blower nozzle to the inner peripheral portion of the stator.

  Therefore, in the stator cooling device according to the present invention, it is desirable that a convex portion is formed on the outer peripheral surface of the blower nozzle, and a concave portion in which the convex portion is fitted is formed on the inner peripheral surface of the stator.

  By adopting such a configuration, it is possible to quantify the insertion amount (depth) without causing a deviation when the blowing nozzle is inserted into the inner peripheral portion of the stator. Thereby, the outer peripheral surface of a ventilation nozzle and the inner peripheral surface of a stator can be stuck firmly. As a result, it is possible to reliably prevent the mist from being caught from the mounting portion of the blower nozzle to the inner periphery of the stator, and to reliably prevent the rust of the electromagnetic steel sheet.

  In the stator cooling device according to the present invention, it is preferable that the blower nozzle includes a detecting unit that detects an insertion depth with respect to the stator.

  By adopting such a configuration, the insertion amount (depth) of the blower nozzle into the inner peripheral portion of the stator can always be kept constant. That is, insufficient insertion or excessive insertion of the blowing nozzle does not occur. For this reason, the outer peripheral surface of a ventilation nozzle and the inner peripheral surface of a stator can be stuck more reliably. As a result, it is possible to more reliably prevent mist from getting in from the mounting portion of the blower nozzle to the inner peripheral portion of the stator, and to more reliably prevent rusting of the electromagnetic steel sheet. Examples of the detecting means include a limit switch and a proximity sensor.

  The present invention, which has been made to solve the above-mentioned problems, is a method of cooling a stator after being molded with resin, and sends mist sprayed from a mist sprayer to the surface of the stator by means of a blower fan. The outer periphery of the tip of the nozzle is brought into close contact with the inner peripheral surface of the stator, and the wind that prevents the mist from entering the inner peripheral portion of the stator is sent from the blow nozzle to the inner peripheral portion of the stator.

  In this stator cooling method, the mist sprayed from the mist sprayer is sent to the surface of the stator by the blower fan, and the outer periphery of the tip of the blower nozzle is brought into close contact with the inner peripheral surface of the stator, and the air is blown from the blower nozzle to the inner peripheral part of the stator. Send. Thereby, since mist adheres uniformly to the surface of the stator and vaporizes, the stator after molding can be uniformly and efficiently cooled by the heat of vaporization of the mist. In addition, since the mist can be prevented from entering the inner peripheral portion of the stator, the mist can be prevented from adhering to the inner peripheral portion of the stator, and the occurrence of rust on the electromagnetic steel sheet can be prevented.

  According to the stator cooling device and method of the present invention, the stator after being molded with resin can be cooled in a short time without rusting.

  BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a most preferred embodiment embodying a stator cooling device and method of the present invention will be described in detail with reference to the drawings. Therefore, a stator cooling device according to the present embodiment will be described with reference to FIGS. FIG. 1 is a diagram illustrating a schematic configuration of a stator cooling device according to an embodiment. FIG. 2 is a perspective view showing an outline of the blowing nozzle. FIG. 3 is a diagram illustrating the relationship between the convex portion of the blower nozzle and the concave portion of the stator.

  As shown in FIG. 1, the stator cooling device 10 includes a mist sprayer 11 that sprays mist, and a blower fan 12 that generates an airflow that sends the mist sprayed from the mist sprayer 11 to the surface of the stator 20. Yes. In the present embodiment, the mist sprayer 11 and the blower fan 12 are integrated. A plurality of the mist sprayer 11 and the blower fan 12 are provided at predetermined intervals obliquely above the stator 20 held at a predetermined position in the apparatus by holding means (not shown).

  The operations of the mist sprayer 11 and the blower fan 12 are controlled by the control unit 40. The control unit 40 controls the operation of the mist sprayer 11 and the blower fan 12 according to predetermined control or detects the surface temperature of the stator 20 and corrects the control content based on the temperature, and performs molding. The subsequent stator 20 is cooled. The control content by the control unit 40 may be obtained in advance by experiments or the like so that a sufficient cooling effect can be obtained. Examples of the contents of control by the control unit 40 include increasing / decreasing the amount of mist spray and the amount of air, and intermittently performing mist spray and blowing.

  In addition, the cooling device 10 is provided with an entrance 13 for allowing the uncooled stator to enter the device 10 and an exit 14 for allowing the cooled stator to exit outside the device 10. These entrances 13 and exits 14 can be raised and lowered, and the control is performed by the control unit 40. The conveyance of the stator 20 into the device 10 and the unloading of the stator 20 outside the device 10 are performed by the conveyance device 15.

  Further, the cooling device 10 has a cylindrical air blowing nozzle 16 having an outer diameter substantially equal to (slightly smaller than) the inner diameter of the molded stator 20, and is connected to the air blowing nozzle 16 through the air blowing nozzle 16. A blower fan 17 for generating an air flow is provided. The blower nozzle 16 and the blower fan 17 are provided so as to be movable up and down, and the control thereof is performed by the control unit 40. As a result, air is blown to the inner peripheral portion of the stator 20 with the air blowing nozzle 16 inserted into the inner peripheral portion from the lower side of the stator 20 held at a predetermined position in the apparatus by a holding means (not shown) and brought into close contact therewith. It can be sent in.

  Here, as shown in FIG. 2, the blow nozzle 16 has a plurality of convex portions 30 at least on the outer peripheral surface of the tip portion. In the present embodiment, four convex portions 30 formed by the insertion depth of the blowing nozzle 16 with respect to the stator 20 are provided at 90 ° intervals. A limit switch 31 is provided on the convex portion 30. The limit switch 31 is connected to the control unit 40. Thereby, the insertion depth with respect to the stator 20 of the ventilation nozzle 16 is quantified. That is, the blower nozzle 16 is raised by the control unit 40 and inserted into the stator 20. When the insertion depth reaches a predetermined depth at this time, the control unit 40 causes the blower nozzle 16 to be based on a signal from the limit switch 31. Stop rising. Thus, the blower nozzle 16 is always inserted into the inner peripheral part of the stator 20 at a constant depth.

  On the other hand, a concave portion 21 into which the convex portion 30 of the blower nozzle 16 is fitted is formed in the mold resin portion 20b in the inner peripheral portion of the stator 20 (see FIGS. 1 and 3). The recess 21 is formed when the stator 20 is molded. The recess 21 may be provided in the mold resin portion 20b between the teeth of the stator 20. In the present embodiment, as shown in FIG. 3, the recess 21 is provided up to the front of the electromagnetic steel plate (stator core) 20 a of the stator 20. And the groove | channel 21a is formed in the front-end | tip part of the recessed part 21, and when the front-end | tip of the convex part 30 reaches this groove | channel 21a, the limit switch 31 reacts.

  Next, a method for cooling the stator 20 by the cooling device 10 described above will be described with reference to FIGS. 1 and 4. FIG. 4 is a diagram illustrating a state of the cooling device during stator cooling. The stator 20 is cooled by the cooling device 10 after the stator is molded with resin.

  First, as shown in FIG. 1, a stator 20 that is resin-molded by a molding machine is mounted on a conveying device 15. Then, the stator 20 after being molded is carried into the cooling device 10 by the conveying device 15. At this time, the entrance 40 is opened by the controller 40, and the stator 20 is carried into the cooling device 10 from the entrance 13. The stator 20 carried into the cooling device 10 is set at a predetermined position in the device by a holding means (not shown) (state shown in FIG. 1).

  Then, from this state, the blower nozzle 16 and the blower fan 17 are raised by the control unit 40, and the tip of the blower nozzle 16 is inserted into the inner peripheral portion of the stator 20 as shown in FIG. 4. At this time, since the convex part 30 of the blower nozzle 16 is fitted into the concave part 21 of the starter 20, no deviation occurs during insertion. And when the front-end | tip of the convex part 31 reaches the groove | channel 21a, the limit switch 31 reacts and the raise of the ventilation nozzle 16 and the ventilation fan 17 stops. Thereby, the insertion amount (depth) with respect to the stator 20 of the ventilation nozzle 16 can be quantified. For these reasons, when the blower nozzle 16 is inserted into the inner peripheral portion of the stator 20, the outer peripheral surface of the blower nozzle 16 and the inner peripheral surface of the stator 20 can be reliably adhered.

  When the insertion (attachment) of the blower nozzle 16 to the stator 20 is completed, the mist is sprayed from the mist sprayer 11 and the blower fan 12 is driven under the control of the control unit 40. The blower fan 17 is also driven. Then, mist is sent to the surface of the stator 20 by the airflow formed by the blower fan 12. Thereby, the mist sprayed from the mist sprayer 11 adheres uniformly to the surface of the stator 20 and vaporizes. Due to the heat of vaporization of the mist, the stator 20 can be cooled uniformly and efficiently. By utilizing the heat of vaporization in this way, a heat exchange rate about 3 to 4 times that of the conventional cooling method (only air blowing) can be obtained. As a result, the cooling time of the stator 20 after molding can be greatly shortened (about ¼).

  Here, the mist may enter the inner peripheral portion of the stator 20. And since the inner peripheral side of the stator 20 is hardly molded in order to improve the performance of the stator, the electromagnetic steel sheet 20a may be exposed. For this reason, if the mist enters the inner peripheral portion of the stator 20, it may enter the electromagnetic steel sheet 20 a on which moisture is laminated to generate rust.

  For this reason, in the cooling device 10, air is sent from the blower fan 17 to the inner peripheral portion of the stator 20 through the blower nozzle 16. Thereby, the mist intrusion into the inner peripheral portion of the stator 20 is prevented by the air flow sent from the blow nozzle 17. Moreover, since the outer periphery of the front end of the blower nozzle 16 is in close contact with the inner peripheral surface of the stator 20, it is possible to prevent mist from getting into the inner peripheral portion of the stator 20 from the mounting portion of the blower nozzle 16. By these things, since it is avoided reliably that mist adheres to the stator 20 inner peripheral part, generation | occurrence | production of the rust of the electromagnetic steel plate 20a can be prevented.

  As described above in detail, according to the cooling device 10 according to the present embodiment, the mist sprayed from the mist sprayer 11 is sent to the surface of the stator 20 by the blower fan 12 to be uniformly attached and vaporized. Thereby, since the stator 20 can be cooled uniformly and efficiently, the cooling time of the stator 20 after molding can be significantly shortened. Further, in the cooling device 10, air is sent from the blower fan 17 to the inner peripheral portion of the stator 20 through the blower nozzle 16 in which the outer periphery of the tip is in close contact with the inner peripheral surface of the stator 20. This reliably prevents mist from adhering to the inner peripheral portion of the stator 20, so that no rust is generated on the electromagnetic steel sheet 20a. Thus, according to the cooling device 10, since the molded stator 20 can be cooled in a short time without rusting using mist, the production efficiency is improved without deteriorating the performance of the stator. Can do.

  It should be noted that the above-described embodiment is merely an example and does not limit the present invention in any way, and various improvements and modifications can be made without departing from the scope of the invention. For example, in the above-described embodiment, the protrusion 30 provided with the limit switch 31 is exemplified. However, instead of the limit switch 31, a proximity sensor (detecting proximity to the electromagnetic steel plate 20a) or the like is used. It is also possible to quantify the insertion depth of the convex portion 30 with respect to the stator 20.

  Further, in the above-described embodiment, the mist sprayer 11 is disposed obliquely above the stator 20, but the disposition of the mist sprayer 11 is not limited to this, and for example, the mist sprayer 11 is disposed on the upper surface and side surfaces of the stator 20. Also good.

It is a figure which shows schematic structure of the cooling device of the stator which concerns on embodiment. It is a perspective view which shows the outline of a ventilation nozzle. It is a figure which shows the relationship between the convex part of a ventilation nozzle, and the recessed part of a stator. It is a figure which shows the mode of the cooling device during stator cooling.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Cooling device 11 Mist sprayer 12 Blower fan 13 Entrance 14 Exit 15 Conveyor 16 Blower nozzle 17 Blower fan 20 Stator 20a Magnetic steel plate 20b Mold resin part 21 Concave part 30 Convex part 31 Limit switch 40 Control part

Claims (4)

In the stator cooling device for cooling the stator after being molded with resin,
A mist sprayer for spraying mist;
A blower fan that sends mist sprayed from the mist sprayer to the surface of the stator;
A blower nozzle for sending a wind to the stator inner peripheral portion, the tip outer periphery being in close contact with the inner peripheral surface of the stator and preventing the mist from entering the inner peripheral portion of the stator;
And a stator cooling device. The stator cooling device according to claim 1,
A convex portion is formed on the outer peripheral surface of the blowing nozzle,
A cooling device for a stator, wherein a concave portion into which the convex portion is fitted is formed on an inner peripheral surface of the stator. In the stator cooling device according to claim 1 or 2,
The cooling device for a stator according to claim 1, wherein the blower nozzle includes a detecting means for detecting an insertion depth with respect to the stator. In the stator cooling method of cooling the stator after being molded with resin,
The mist sprayed from the mist sprayer is sent to the surface of the stator by a blower fan, and the outer periphery of the tip of the blower nozzle is brought into close contact with the inner peripheral surface of the stator to prevent the mist from entering the inner peripheral portion of the stator. The stator cooling method is characterized in that the air to be sent is sent from the blow nozzle to the inner periphery of the stator.

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