JPH09247914A - Carbon powder stripper in totally enclosed fan cooled wound induction motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the necessity of hands and automate a work and prevent the deterioration in a work environment by airtightly connecting an exhaust port and an exhaust fan through a dust pack and airtightly connecting an intake port and an intake fan. SOLUTION: With a command means turned on, an exhaust fan 20 and an intake fan 21 rotate through a controlling section 30. Then, air with a little dust is sent in into a motor from outside a box 24 through an intake filter 27 and an opening 242. Carbon powder in the motor is accumulated in a dust pack 25 instal led in the box 24 together with the air sent in into the motor through an exhaust hose 22 and an opening 241 from an exhaust port 121. At the same time, air with no carbon powder is exhausted outside the box 24 through an exhaust filter 26. The dust pack 25 is taken out of the box 24 and the carbon powder accumulated in the dust pack 25 is disposed as waste. Therefore, carbon powder can be eliminated from the motor periodically and automatically without necessitating hands which have been necessary in conventional methods.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for removing carbon powder in a totally enclosed fan-type wound induction motor.

[0002]

2. Description of the Related Art As an example, a conventional carbon powder removal processing operation in a fully-closed outer fan type winding induction motor (hereinafter simply referred to as a motor) used for hoisting an overhead crane will be described with reference to the drawings. FIG. 5 is a partially cutaway front view of the electric motor. In the figure, 10 is a motor, 11 is a frame,
12 is an end bracket on the slip ring side, 13 is a stator, 14 is a rotor, 15 is a slip ring, 16
Is a fan for cooling the frame, and 17 is an end bracket on the fan side.

In the motor 10, since the carbon brush 151 constantly presses and slides on the slip ring 15, it is necessary to appropriately remove the carbon powder that has been scattered due to wear in the motor 10. Conventionally, when the motor 10 is stopped, the blower 1 is opened from the inspection opening 18 for maintenance of the slip ring which is opened in advance.
Air was blown in at 9, and carbon powder accumulated inside the motor was blown out through the inspection port 18.

[0004]

However, the conventional carbon powder removing method has the following problems. (1) Since the carbon powder is blown out from the inspection port 18 during the work, the carbon powder is scattered in the atmosphere and the working environment is extremely deteriorated. (2) Since air is blown and blown out through the same inspection port 18, it is difficult to remove carbon powder on the opposite side of the slip ring 15 (for example, the load side when the slip ring is the anti-load side). (3) The removal work needs to be performed manually.

Therefore, the invention according to claim 1 of the present invention automates the work without requiring human labor, and
It is an object of the present invention to provide a carbon powder removing device for a fully-enclosed fan-type wound induction motor that does not deteriorate the working environment.

According to a second aspect of the present invention, in addition to the object of the first aspect of the invention, there is provided a fully enclosed outer fan type winding type induction motor in which the number of parts is reduced by using an outer fan for cooling a motor outer casing. An object is to provide a carbon powder removing device.

In addition to the object of the invention described in claim 2, an object of the invention in claim 3 is to provide a carbon powder removing device in a totally enclosed external fan type wound-rotor induction motor having a simple structure. .

[0008]

In order to achieve the above-mentioned object, the invention according to claim 1 of the present invention is an exhaust gas provided in a slip ring side end bracket of a fully-closed external fan-type winding induction motor. Exhaust port, an intake port opened in the frame on the side opposite to the slip ring, an exhaust fan and an intake fan installed outside the electric motor, and an exhaust port that airtightly connects the exhaust port and the exhaust fan via a dust pack. It is characterized in that it is provided with an intake hose, an intake hose for air-tightly connecting an intake port and an intake fan, and a control unit for controlling the operation of the intake fan and the exhaust fan.

According to the second aspect of the present invention, the exhaust port formed in the end ring bracket on the slip ring side of the fully-closed outer fan type wound induction motor, the air intake port formed in the outer fan side end bracket, and the air intake port. An inlet opening and closing means for opening and closing the
It is equipped with an exhaust fan arranged outside the machine, an exhaust hose for air-tightly connecting the exhaust port and the exhaust fan via a dust pack, and a control section for controlling the exhaust fan and the intake port opening / closing means. Further, the control unit is characterized in that, during operation of the electric motor, the exhaust fan is operated at the same time when the intake port is opened, and the intake port is closed and the exhaust fan is stopped after a predetermined time has passed. In the configuration of the invention described in claim 1, the intake fan is changed to an external fan attached to the motor.

According to a third aspect of the present invention, in the configuration of the second aspect of the invention, the intake opening / closing means has a plurality of intake openings formed in the outer fan side end bracket and the rotation of the electric motor. A simple structure is provided, which includes a cover that is rotatably fixed to a shaft and that opens and closes the plurality of intake ports at the same time, and a drive unit that rotates the cover forward and backward. There is.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a drawing according to the invention of claim 1 and is a partially cutaway front view illustrating the configuration of the carbon powder removing apparatus 100, and FIGS. 2 to 4 are drawings according to the invention of claim 2. FIG. 3 is a partially cutaway front view for explaining the configuration of the carbon powder removing device 200, FIG. 3 is a cross-sectional view taken along the line AA ′ of FIG. 2, and FIG. 4 is a front view for explaining an example of use of the device of the present invention. . In the figure, the same parts are designated by the same reference numerals.

In the device 100 of the present invention, the exhaust port 121 formed in the end bracket 12 on the slip ring side of the frame 11, the intake port 111 formed in the frame 11a on the anti-slip ring side of the frame 11, and the motor 10 are separate. An exhaust fan 20 and an intake fan 21 installed in
Exhaust hose 22, intake hose 23, control unit 30
Is provided.

The exhaust fan 20, the intake fan 21, and the control unit 30 are arranged in a box body 24 partitioned by a partition wall. One end of the exhaust hose 22 has the exhaust port 121.
The other end is airtightly connected to an opening 241 formed in the box 24. Further, the opening 241 communicates with the exhaust fan 20 through a dust pack 25 which is detachably connected to the opening 241 and an exhaust filter 26 which is arranged at the other end of the dust pack 25.

On the other hand, one end of the intake hose 23 is air-tightly connected to the intake 111, and the other end thereof is connected to an opening 242 formed in the box 24. The opening 242 communicates with the intake fan 21 via an intake filter 27 connected to the opening 242.

The control unit 30 includes a microcomputer, and the operating cycle and operating time of the device 100 of the present invention are preset. Then, the exhaust fan 20 and the intake fan 21 are rotated by an ON signal of a push button switch (not shown), and the operation of both fans is stopped after a lapse of a predetermined time.

Next, the operation of the device 100 of the present invention will be described.
When a command means such as a push button switch (not shown) is turned on, the exhaust fan 20 and the intake fan 21 are rotated via the control unit 30. The intake air is taken from outside the box body 24 by the intake filter 27 and the opening 24
Air having a small amount of dust is sent into the motor 10 through 2.

The carbon powder in the motor 10 passes through the exhaust port 121, the exhaust hose 22 and the opening 241, and the dust pack 25 provided in the box 24 together with the sent air.
The air that is stored in the box body 24 and is discharged to the outside of the box body 24 through the exhaust filter 26. The carbon powder stored in the dust pack 25 is taken out from the box body 24 by removing the dust pack 25.

Next, the invention device 2 according to the invention of claim 2
The case where 00 is applied to the hoisting motor of an overhead crane will be described. The present invention device 200 is different from the above invention device 100 in the following points. That is, the intake fan 21, the intake hose 23, and the intake filter 27 are not provided. Then, a plurality of intake ports 171 opened in the outer fan side end bracket 17, an intake port opening / closing unit 40 for opening / closing the intake port 171, an operation of the exhaust fan 20, and an intake port opening / closing unit 4
The control unit 50 controls the opening and closing of 0. Other than that, the device is the same as the device 100 of the present invention, and the same portions are denoted by the same reference numerals.

The intake port 171 is the outer fan side end bracket 1
A plurality (4 in the illustrated example) are provided at appropriate positions in 7 on the same circumferential line at equal intervals.

The inlet opening / closing means 40 is composed of a cover 41 and a drive section 42 for rotating the cover 41. The cover 41 is a plate-shaped piece attached to the pulley / boss portion 411 fixed to the motor rotating shaft,
It has the same number as 71 and a vertical width and a horizontal width that sufficiently cover the intake port 171.

The drive unit 42 includes a motor 421 with a speed reducer installed near the motor 10, and a belt 422 for connecting the boss 411 and the output shaft of the motor 421 with the speed reducer. The belt 422 is configured to connect the both through an opening 172 formed in the outer fan side end bracket 17.

The control unit 50 has the function of operating the intake opening / closing means 40 in addition to the control unit 30, and detects the time required for the cover 41 to open / close the vent 171 or detects the time required for opening / closing the cover 41. Based on a signal from a position detector such as a limit switch (not shown) for detecting the open / closed position, the motor 421 with the speed reducer is driven in the forward and reverse directions and stopped.

Reference numeral 51 is an operation command device such as a push button switch installed in the cab 511 of the overhead crane, 52 is a set time,
Setting indicator that displays operating time and sets operating time,
53 is a cable that electrically connects the operation command device 51 and the control unit 50, 54 is a cable that electrically connects the motor with reduction gear 421 and the control unit 50, 512 is a club, 513 is a hoisting drum, and 514 is a girder Is.

Next, the operation of the device 200 of the present invention will be described.
The control unit 50 has a preset time for opening the intake port 171. The cover 41 closes the intake port 171 and the motor 1
When the operation command device 51 is turned on while 0 is rotating, the motor with reduction gear 421 is rotated via the control unit 50. The cover 41 rotates and the intake port 171 opens.
Outside air is sent into the motor 10 through the ventilation port 171 by the external fan 16, and is discharged outside the box body 24 through the exhaust port 121, the exhaust hose 22, the dust pack 25, and the exhaust filter 26 by the exhaust fan 20.

Then, according to the above, the carbon powder is stored in the dust pack 25. After a lapse of a predetermined time, the motor with reduction gear 421 rotates in the opposite direction to the above, the cover 41 closes the intake port 171, and the outer fan 16 air-cools the outer cover of the motor 10.

The rotation position detecting means of the cover 41 may be a timer or a limit switch (not shown). Further, the configuration of the drive unit 42 is not limited to the present embodiment as long as the cover 41 can be rotated by a predetermined angle.

[0027]

As described above, according to the first aspect of the present invention, the exhaust port formed in the end bracket of the slip ring side of the fully closed outer fan winding type induction motor and the frame on the side opposite to the slip ring side. An intake port, an exhaust fan and an intake fan installed outside the electric motor, an exhaust hose that airtightly connects the exhaust port and the exhaust fan via a dust pack, an intake port and an intake fan It is characterized in that it is provided with an intake hose for air-tightly connecting and a control section for controlling the operation of the intake fan and the exhaust fan. Therefore, without requiring labor as in the past,
Since the carbon powder removing work can be carried out regularly and automatically, the work efficiency is good, and the work environment is sanitary without deteriorating the work environment.

According to a second aspect of the present invention, the exhaust port opened in the slip ring side end bracket of the fully-closed outer fan type winding induction motor, the intake port opened in the outer fan side end bracket, and the intake port are opened and closed. Intake opening / closing means, an exhaust fan arranged outside the machine, an exhaust hose for airtightly connecting the exhaust opening and the exhaust fan via a dust pack, and a control section for controlling the exhaust fan and the intake opening / closing means And, while the electric motor is in operation, the control unit controls the exhaust fan to operate simultaneously with opening the intake port, and closes the intake port after a predetermined time to stop the exhaust fan. It is characterized by that. Therefore, in addition to the effect of the first aspect of the invention, since the outer fan of the motor is used, there is an advantage that a ventilation fan, a ventilation hose, etc. are not required, the number of parts is small, and the device can be made compact.

According to a third aspect of the present invention, the intake opening / closing means includes a plurality of intake openings formed in the outer fan side end bracket, and the plurality of intake openings rotatably fixed to the rotary shaft of the electric motor. It is characterized in that it is provided with a cover formed of a plate-like piece that opens and closes simultaneously, and a drive unit that rotates the cover forward and backward. Therefore, in addition to the effect of the invention described in claim 2, there is an advantage that the configuration is simple and the installation space of the carbon powder removing device can be reduced.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view illustrating a configuration of a carbon powder removing device according to a first aspect of the invention.

FIG. 2 is a partially cutaway front view illustrating a configuration of a carbon powder removing device according to a second aspect of the invention.

FIG. 3 is a cross-sectional view taken along the line A-A ′ of FIG.

FIG. 4 is a front view illustrating a state in which the device of the present invention is attached to an overhead crane.

FIG. 5 is a partially cutaway front view illustrating a conventional carbon powder removing device.

[Explanation of symbols]

 11 Frame 12 Slip Ring Side Bracket 16 Fan 17 Fan Side End Bracket 20 Exhaust Fan 21 Intake Fan 22 Exhaust Hose 23 Intake Port Hose 25 Dust Pack 26 Exhaust Filter 27 Intake Filter 30 Control Unit 40 Intake Port Opening / Closing Unit 41 Cover 421 Reducer Motor 422 Belt 50 Control unit

Claims (3)

[Claims] 1. An exhaust port provided in an end bracket of a slip ring side of a fully-closed fan-type wound induction motor, an intake port provided in a frame on the anti-slip ring side, and an outside of the electric motor. The exhaust fan and the intake fan, the exhaust hose that airtightly connects the exhaust port and the exhaust fan via the dust pack, the intake hose that airtightly connects the intake port and the intake fan, and the intake fan and the exhaust fan A device for removing carbon powder in a fully-closed external fan-type wire wound induction motor, comprising: a control unit for controlling operation. 2. An exhaust port formed in an end bracket on a slip ring side of a fully-closed outer fan type winding induction motor, an intake port formed in the outer fan side end bracket, and an intake port opening / closing means for opening / closing the intake port. An exhaust fan disposed outside the machine, an exhaust hose that airtightly connects the exhaust port and the exhaust fan via a dust pack, and a control unit that controls the exhaust fan and the intake opening / closing means. And the control unit controls the exhaust fan to operate simultaneously with the opening of the electric motor while the electric motor is operating, and closes the intake port after a predetermined time period to stop the exhaust fan. A carbon powder removal device in a fully enclosed fan-type wound induction motor. 3. The intake opening / closing means includes a plurality of intake openings formed in an outer fan side end bracket and a plate rotatably fixed to a rotary shaft of the electric motor to simultaneously open / close the plurality of intake openings. The carbon powder removing device for a fully-closed outer fan-type wound induction motor according to claim 2, further comprising: a cover formed of a strip and a drive unit for rotating the cover in a normal and reverse directions.