JP2011072908A - Method and apparatus for varnish treatment of winding of rotating electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and an apparatus for treating varnish with high quality. <P>SOLUTION: A center axis 100a of the core of a rotating electric machine 100 is slanted at 45 degree to the horizontal plane and a rotary mount 5 is rotated to rotate the rotating electric machine on the center axis. In this state, a varnish 200 is flowed down toward a slanting upper end part 100U of the rotating electric machine by a nozzle 30. Due to the rotation of the rotating electric machine on the axis, the part of the rotating electric machine, that is, the slanting upper end part, is circulated and turned to supply the varnish to the entire end part of the rotating electric machine. The varnish flowing down on the wiring flows downward of the center axis and in the circumferential direction of the wiring due to the specific gravity and is supplied to the enter surface of the wiring. In this way, owing to the specific gravity and movement of the rotating electric machine itself, the varnish can be spread on the entire surface of the wiring, so that the supply amount of the varnish can be suppressed to the minimum and the yield can be improved. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a varnish treatment method and apparatus for applying varnish to windings of a rotating electrical machine.

Conventionally, the following two methods have been generally used as varnish treatment methods for windings of rotating electrical machines.
(1) A method of dipping a rotating electrical machine in a varnish and impregnating the varnish (dipping method).
(2) A method in which the core central axis of a rotating electrical machine is held horizontally or tilted from the horizontal, and the varnish flows down to both ends of the winding while rotating the core around the central axis (Patent Document 1) .

JP-A-9-66258

In the prior art (1), a large amount of varnish for collecting in the dip tank is required, and since the entire jig is immersed, it takes time to remove and maintain the varnish adhering to the jig. In addition, a lot of varnish adheres to the lower part of the winding of the dipped rotating electric machine, and the amount of the upper part is reduced.
In the prior art (2), the varnish that has once flowed to the lower slope of the winding part remains in the lower part and does not flow again to the winding part. For this reason, the yield of varnish is low.

(1) The invention of claim 1 is a varnish treatment method for applying a varnish to a winding of a rotating electrical machine, wherein the varnish is applied to the winding in a state where the central axis of the rotating electrical machine is inclined at a predetermined angle from the horizontal. And a swinging step of swinging the rotary electric machine substantially along a vertical plane while rotating about the central axis.
(2) According to a second aspect of the present invention, in the varnish treatment method according to the first aspect, when the varnish is caused to flow down in the varnish flow-down step, the rotating electrical machine is rotated around its central axis.
(3) The invention of claim 3 is characterized in that, in the varnish treatment method of claim 1 or 2, a heating step of heating the winding to gel the varnish is executed after the end of the swing step.
(4) According to a fourth aspect of the present invention, in the varnish processing method according to the third aspect, in the heating step, the rotating electric machine is rotated about the central axis.
(5) The invention of claim 5 is the varnish processing method according to any one of claims 1 to 4, wherein the rotating electric machine is swung a plurality of times in the swing step.
(6) According to a sixth aspect of the present invention, in the varnish treatment method according to the first aspect, in the varnish flow-down step, the rotary electric machine is caused to swing substantially along a vertical plane while rotating about the central axis. Features.
(7) The invention according to claim 7 is the varnish processing method according to any one of claims 1 to 4, wherein the swing speed is continuously changed in the swing step.
(8) The invention of claim 8 is a varnish treatment device for applying a varnish to a winding of a rotating electrical machine, the rotating support means for supporting the rotating electrical machine so as to rotate about its rotation center, and a vertical surface. A swinging means for swinging the rotation support means substantially along with a swing specification that is set in advance according to a swing specification that is set in advance, while the rotation support means rotates the rotating electrical machine and the swinging means gives a swing motion to the rotating electrical machine. And a control device.
(9) The invention according to claim 9 is the varnish processing apparatus according to claim 8, wherein the swing specification includes any of the number of swing motions, the speed of the swing motion, and the angular range of the swing motion. .
(10) The invention of claim 10 is the varnish processing apparatus according to claim 8 or 9, further comprising a heating device for heating the varnish flowing down to the winding, wherein the control device is a swing motion of the rotating electrical machine. After finishing, the varnish flowing down to the winding is heated.

  According to the present invention, high-quality varnish processing can be realized.

The block diagram which shows one Embodiment of the varnish processing apparatus by this invention. The front view which shows the varnish flow-down process by 1st Embodiment of the varnish processing method using the varnish processing apparatus of FIG. The front view which shows the flow of the swing process following the varnish flow-down process by 1st Embodiment. The front view which shows the heating process following the swing process by 1st Embodiment. The front view which shows the varnish flow-down process by 2nd Embodiment of the varnish processing method using the varnish processing apparatus of FIG. The front view which shows the three-way nail | claw type | mold chuck | zipper used for the varnish processing apparatus of the 1st-3rd embodiment. Plan view of FIG.

[First Embodiment]
FIG. 1 shows a varnish treatment apparatus 20 used when applying and impregnating a winding of a rotating electrical machine, that is, when applying a varnish treatment to the rotating electrical machine. The varnish processing device 20 includes a base 4 supported by clevis cylinders 10a and 10b, a rotary base 5 rotatably provided on the base 4, and a rotary base 5 mounted on the lower surface of the base 4. It has a motor 15 for rotational driving, a chuck mounting base 2 mounted on the rotary base 5 via a spacer 3, a chuck mechanism 1 supported by the chuck mounting base 2, and a control unit 7. The control unit 7 controls the tilt and swing motion of the base 4 by controlling the clevis-type cylinders 10 a and 10 b, and controls the rotation and stop of the motor 15.

  The chuck mechanism 1 includes, for example, a three-way claw chuck 12 (FIGS. 6 and 7) that holds the rotating electrical machine 100 to be varnished. The three-way claw chuck 12 grips the rotating electrical machine 100 on its peripheral surface by opening and closing the claw using air as a driving source. The rotation center axis of the rotary pedestal 5 is set to be coaxial with the core center axis 100 a of the rotary electric machine 100, that is, the rotary axis in the gripping state of the rotary electric machine 100. The chuck mechanism 1 holds the rotating electrical machine 100 so that the core center axis 100a is vertical when the base 4 is horizontal (FIG. 1).

  The clevis cylinders 10a and 10b are arranged in parallel to each other, and are pivotally attached to the lower surface of the base 4 by clevises 6 parallel to each other at the tip ends of the cylinder rods 10ar and 10br. On the other hand, the base ends of the clevis cylinders 10a and 10b are connected to a fixing member (not shown). The clevis cylinders 10a and 10b are set so that the base 4 is horizontal when both are equal in length, and the base 4 is inclined with respect to the horizontal plane when the both extend and contract so as to have different lengths. To do. That is, the base 4 can be swung by appropriately contracting the cylinders 10a and 10b.

  A controller 7 is connected to the clevis cylinders 10a and 10b and the motor 15. The rotation / stop of the motor 15 and the tilting and swinging motion of the base 4 are controlled by the control unit 7.

  The varnish processing method of applying the varnish to the coil of the rotating electrical machine 100 using the varnish processing apparatus 20 described above includes a rotating electrical machine gripping process, a varnish flow-down process, a swing process, and a heating process described below.

[Rotating electric machine gripping process]
Air is supplied to the three-way claw chuck 12 from an air driving source to release the claw. The rotating electrical machine 100 is inserted into the center of the opened nail and the nail is closed. As a result, the rotating electrical machine 100 is gripped in a state in which the rotational axis is concentric with the gripping central axis of the chuck 12 and the coil end of the winding is positioned on the outermost periphery.

[Varnish flow process]
As shown in FIG. 2, first, the control unit 7 extends the clevis cylinders 10 a and 10 b with different strokes, and the central axis 100 a of the core of the rotating electrical machine 100 is inclined 45 degrees with respect to the horizontal plane. Further, the control unit 7 controls the motor 15 to rotate the rotating pedestal 5 to rotate the rotating electrical machine 100 around the central axis 100a.

  In this state, the varnish 200 is caused to flow down toward the inclined upper end portion 100U by the nozzle 30 obliquely above the upper surface of the coil end portion of the rotating electrical machine 100. As the rotating electrical machine 100 rotates, the coil end portion of the rotating electrical machine 100 that becomes the inclined upper end portion 100U circulates and circulates, and the varnish 200 is supplied to the entire coil end portion of the rotating electrical machine 100. The varnish 200 that has flowed down to the winding coil end flows along the surface of the winding due to gravity and flows downward in the central axis 100a and in the winding circumferential direction, and the varnish is supplied to the entire winding surface.

[Swing process]
After completion of the varnish flow process, as shown in FIGS. 3A to 3E, the control unit 7 controls the clevis cylinders 10a and 10b and the motor 15 to rotate the rotating electrical machine 100 while rotating the clevis cylinder. 10a and 10b are expanded and contracted. As a result, the central axis 100a swings between −180 degrees (one horizontal state) in (a) and +180 degrees (the other horizontal state) in (e) substantially along the vertical plane. The rotating electrical machine 100 swings. In the swing movement, for example, a sufficient diffusion / penetration effect was obtained with a constant swing speed and a single swing. The swing speed and the number of swings, that is, the swing specifications at the time of the swing process are set in the control unit 7 in advance. For example, the operator can be configured to set the swing specification from an input interface connected to the control device.

  Here, since FIG. 3D corresponds to FIG. 2 of the initial posture, the number of swing motions is one sequence of swing motions until the initial posture returns to the initial posture. For example, FIG. 3 (a) → FIG. 3 (b) → FIG. 3 (c) → FIG. 3 (d) → FIG. 3 (e) shows a swing motion by one swing process.

  3 (d) corresponding to FIG. 2 at the time of the varnish flow process is set as the starting point of one swing motion, and FIG. 3 (d) → FIG. 3 (e) → FIG. 3 (d) → FIG. 3 (c) → FIG. The rotating electrical machine 100 may be swung as shown in (b) → FIG. 3 (a) → FIG. 3 (b) → FIG. 3 (c), and the end point may be set to FIG. The maximum swing angle range in this case is also +180 degrees to -180 degrees, but the angle range of the swing motion is not limited to +180 degrees to -180 degrees.

[Heating process]
After completion of the varnish flow-down process, as shown in FIG. 4, the control unit 7 controls the clevis cylinders 10a and 10b and the motor 15 to rotate while maintaining the central axis 100a horizontal (-180 degrees or 180 degrees). The electric machine 100 is rotated. In this state, hot air is jetted from the hot air generator 40 toward the rotating electrical machine 100 to gel the varnish 200 applied to the windings.

  According to the varnish coating method described above, the following effects can be obtained.

(1) Since the varnish 200 is spread over the entire winding surface by gravity and the movement of the rotating electric machine 100 itself, the supply amount of the varnish 200 can be minimized and the yield can be improved.

(2) By causing the rotating electrical machine 100 to swing while rotating, the varnish 200 is subjected to centrifugal force in the winding radial direction due to the rotating motion and centrifugal force in the winding axis direction due to the swinging motion, and gravity is applied. Works. This promotes diffusion and penetration of the varnish 200 inside the winding, and the varnish 200 is applied to the entire winding.

(3) By setting the range of the swing motion to −180 degrees to +180 degrees, the action of gravity acts uniformly in the axial direction and the radial direction of the winding, and the diffusion / penetration effect of the varnish 200 is enhanced.
(4) After the swing process, the rotating electrical machine 100 coated with the varnish was heated while rotating. Thereby, the whole winding can be heated evenly, and the varnish 200 can be completely gelled.

[Second Embodiment]
Next, a second embodiment of the varnish treatment method according to the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the part which is the same as that of 1st Embodiment in a figure, or an equivalent, and description is abbreviate | omitted. The difference between the varnish treatment method of the second embodiment and the varnish treatment method of the first embodiment is in the varnish flow-down process.

  As shown in FIG. 5, in the varnish flow-down process, the control unit 7 expands and contracts the clevis cylinders 10 a and 10 b to swing the central axis 100 a of the core of the rotating electrical machine 100 within a range of 40 to 90 degrees with respect to the horizontal plane. Further, the control unit 7 controls the motor 15 to rotate the rotary base 5 to rotate the rotating electrical machine 100 around the central axis 100a. The varnish 200 is caused to flow down by the nozzle 30 toward the inclined upper end 100U of the rotating electrical machine 100 while swinging the rotating rotating electrical machine 100. The position of the nozzle 30 is adjusted in synchronization with the swing of the rotating electrical machine 100.

  FIG. 5 shows an example in which the rotating electrical machine 100 is swung around the motor 15 by expanding and contracting the clevis-type cylinders 10a and 10b. When such a swinging mechanism is employed, the following configuration is adopted. The position of the nozzle 30 need not be changed. That is, the nozzle 30 may be fixedly installed at a location separated by a distance such that the rotating electrical machine 100 does not collide with the nozzle 30 due to the swing of the rotating electrical machine 100.

  FIG. 5 is a diagram schematically showing how the rotating electrical machine 100 is swung around the motor 15 by expanding and contracting the clevis cylinders 10a and 10b. The operation and posture of each element at the time of swinging are convenient. It is shown as an example.

  As the rotating electrical machine 100 rotates, the inclined upper end 100U from which the varnish has flowed down from the nozzle 30 circulates and circulates, and the varnish 200 is supplied to the entire end of the rotating electrical machine 100. Further, by applying a swing motion in the varnish flow-down process, not only the varnish 200 is supplied to the entire winding, but also a varnish diffusion / penetration effect is obtained.

[Third Embodiment]
Next, a third embodiment of the varnish processing method according to the present invention will be described.
In the swing process in the first embodiment, the swing motion that swings in the range of −180 degrees to +180 degrees is performed only once. In the varnish application method of the third embodiment, the swing motion is performed a plurality of times. As a result, the varnish diffusion / penetration effect can be further enhanced.

  The number of swing movements performed in the varnish processing step is configured to be set in advance in the control unit 7 by the operator. Therefore, the number of swing movements can be changed as appropriate.

[Fourth Embodiment]
Next, a fourth embodiment of the varnish treatment method according to the present invention will be described.
In the heating process in the first embodiment, the hot air generator 40 is used. However, in the heating process in the fourth embodiment, a heating device other than the hot air generator, such as an electric heating device or a far-infrared furnace, is used. It is. Even if such a heating means is used, the same effect as in the first embodiment can be obtained.

[Fifth Embodiment]
Next, a fifth embodiment of the varnish treatment method according to the present invention will be described.
In the swing process in the first embodiment, a swing motion that swings at a constant speed in a range of −180 degrees to +180 degrees is performed. In the fifth embodiment, the speed of the swing motion of the swing process in the first embodiment is continuously changed. The rate of speed change is, for example, 5% to 20%, whereby the balance between the axial centrifugal force acting on the varnish 200 and the gravity changes, and the diffusion and penetration of the winding in the axial direction are promoted.

  The speed pattern of the swing motion performed in the varnish processing step is configured so that the operator presets the control unit 7. Therefore, it is possible to appropriately change the speed pattern of the swing motion.

[Sixth Embodiment]
Next, a sixth embodiment of the varnish treatment method according to the present invention will be described.
In the sixth embodiment, the swing time, swing angle range, and the like in the swing process in each of the above-described embodiments are simplified by the effect of the varnish flow-down process.

  In the varnish flow-down process, the varnish flows down while rotating the rotary electric machine 100, so that the varnish diffusion / penetration effect is obtained. Therefore, when a sufficient diffusion / penetration effect of the varnish is obtained by the varnish flow-down process, the swing process can be omitted or the time of the swing motion can be set short. In order to shorten the swing exercise time, for example, the swing angle range can be set narrow. In order to omit and save the swing process, it is possible to set a longer time for the varnish flow process.

  The swing specification including the setting and omission of the swing process, the setting and changing of the swing angle range, and the setting and changing of the varnish flow time are also configured such that the operator sets the control unit 7 in advance. For example, the operator can appropriately change various conditions in the varnish flow-down process from an input interface connected to the control device.

  The varnish treatment apparatus 20 described above can be modified as in the following (1) to (3).

(1) The chuck mechanism 1 in the varnish processing apparatus 20 is not limited to the air-driven three-way claw chuck 12, and a collet chuck or other system that can use electric power or other driving sources is also employed. Is possible.

(2) In the varnish processing apparatus 20, the means for inclining the base 4 is not limited to the clevis cylinders 10a and 10b, and a linear motor or other driving means may be employed.

(3) The control by the control unit 7 is not limited to the inclination of the base 4 and the rotation of the rotary base 5, but may control the chuck mechanism 1 and others.

(4) Each component of the varnish treatment apparatus 20 can be appropriately changed to a substitute as necessary, and those with low necessity should be omitted.

(5) Heat treatment can be omitted and the varnish can be naturally dried.
(6) The diffusion / penetration effect is extremely effective not only in concentrated windings but also in distributed windings.

The above description is merely an example, and the present invention is not limited to the above-described embodiments and modifications unless the features of the present invention are impaired.
Therefore, the present invention provides a varnish flow-down process in which the varnish flows down the winding while the central axis of the rotating electrical machine is inclined at a predetermined angle from the horizontal, and the rotating electrical machine rotates around the central axis while rotating the rotating electrical machine around the central axis. Various varnish processing methods including a swinging step of swinging along substantially the same.

  The present invention also provides a rotary support device that supports the rotary electric machine so as to rotate about its rotation center, a swing mechanism that swings the rotary support device that supports the rotary electric machine substantially along a vertical plane, and a preset value. In accordance with the swing specification, various varnish processing devices including a control device that rotates the rotating electrical machine with the rotation support device and applies a swing motion to the rotating electrical machine with the swing device are included.

  It is also possible to combine the embodiment and one of the modified examples, or to combine the embodiment and a plurality of modified examples. It is possible to combine the modified examples in any way.

1: Chuck mechanism 2: Chuck mount
4: Base 5: Rotating base
7: Control unit 10a, 10b: Clevis cylinder
15: Motor 20: Varnish processing device
30: Nozzle 100: Rotary electric machine 100a: Central axis of the core of the rotary electric machine 200: Varnish

Claims (10)

A varnish treatment method for applying varnish to a winding of a rotating electrical machine,
A varnish flow-down step of flowing down the varnish to the winding in a state where the central axis of the rotating electrical machine is inclined from the horizontal at a predetermined angle;
A varnish processing method comprising: a swinging step of swinging the rotary electric machine substantially along a vertical plane while rotating about the central axis. In the varnish processing method of Claim 1,
In the varnish flow-down process, the rotating electric machine is rotated around its central axis. In the varnish processing method of Claim 1 or 2,
A varnish treatment method, wherein a heating step of heating the winding to gel the varnish is performed after the end of the swing step. In the varnish processing method of Claim 3,
In the heating step, the rotating electric machine is rotated about the central axis. In the varnish processing method of any one of Claims 1 thru | or 4,
In the swing process, the rotating electric machine is swung a plurality of times. In the varnish processing method of Claim 1,
In the varnish flow-down step, the varnish treatment method is characterized in that the rotary electric machine is swung along a vertical plane while rotating about the central axis. In the varnish processing method of any one of Claims 1 thru | or 4,
In the swing step, the varnish treatment method is characterized by continuously changing the swing speed. A varnish treatment device for applying varnish to windings of a rotating electrical machine,
Rotation support means for supporting the rotating electrical machine so as to rotate about its rotation center;
Swing means for swinging the rotation support means for supporting the rotating electrical machine substantially along a vertical plane;
A varnish processing apparatus, comprising: a control device that causes the rotary electric machine to swing by the swinging means while rotating the rotary electric machine by the rotation support means in accordance with a preset swing specification. The varnish processing apparatus according to claim 8,
The varnish processing apparatus, wherein the swing specification includes any of the number of swing motions, the speed of the swing motion, and the angular range of the swing motion. The varnish processing apparatus according to claim 8 or 9,
A heating device for heating the varnish flowing down to the winding;
The said control apparatus heats the varnish which flowed down by the said coil | winding after completion | finish of the swing motion of the said rotary electric machine, The varnish processing apparatus characterized by the above-mentioned.

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