JP2006109614A - Cleaning method for motor coil and cleaning device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cleaning method that can simply and effectively remove contamination such as oil and dust adhered and fixed to front and rear surfaces of the stator coil or the rotor coil of a motor without damaging the insulating material of the stator coil or the rotor coil of the motor at low cost, and to provide a cleaning device. <P>SOLUTION: The cleaning method for the motor coil immerses the motor coil 2 into a cleaning tank 1 wherein a cleaning liquid 3 is filled, blows steam 7 into the cleaning liquid 3 from an injection means 4 arranged in the cleaning tank 1, and boils the cleaning liquid 3. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a cleaning method and a cleaning device that can remove dirt such as oil and dust adhered and fixed to a stator coil or a rotor coil of an electric motor, and more particularly, to a driving motor in a rolling mill, a conveyance roller, and the like. The present invention relates to a cleaning method and a cleaning apparatus that can suitably clean a stator coil or a rotor coil.

  An electric motor used as a driving power source for electric devices and facilities in various factories has a remarkable decrease in insulation resistance due to moisture absorption due to dirt such as oil and dust adhered and fixed over time. Therefore, in order to restore the insulation performance of the motor and extend the life of the motor, an insulation correction operation is performed in which the stator coil and the rotor coil of the motor are cleaned and the insulation is reprocessed.

  This insulation repairing operation usually includes the following steps: electric motor disassembly, cleaning, drying, varnish treatment, and assembly. In particular, the cleaning process has been conventionally pre-dried before cleaning, and the dirt such as oil and dust that adheres and adheres to the surface is lifted to remove rough dirt by air blow, and then blown and washed by steam. A combination of immersion cleaning with an organic solvent or scrubbing cleaning with a brush is performed. Insufficient cleaning in such a cleaning process makes it difficult to recover good insulation performance even if careful subsequent varnish treatment is performed, and contributes to shortening the life of the motor. In addition, it is desired to develop a cleaning method and a cleaning apparatus that can effectively remove dirt such as oil and dust adhering to and fixed to the rotor coil.

  Until now, several techniques related to a cleaning method and a cleaning apparatus for a stator coil and a rotor coil of an electric motor have been proposed. For example, Patent Document 1 discloses a technique related to an automatic motor cleaning device that automatically cleans a stator, a rotor, and an iron core of an electric motor using a cleaning nozzle having a shape following mechanism of the electric motor. The apparatus has a mechanism that can freely move back and forth to the electric motor. Further, Patent Document 2 combines ultrasonic cleaning with submerged jet cleaning in which a stator coil and a rotor coil of an electric motor are immersed in a cleaning liquid, and the cleaning liquid is sprayed onto the stator coil or the rotor coil of the electric motor. In addition, a technique relating to a method for cleaning a stator coil and a rotor coil of an electric motor characterized by using a non-foaming detergent is disclosed.

On the other hand, as a technique related to cleaning of machine parts, for example, in Patent Document 3, a large-sized machine part is placed on a turntable in a hood, and a cleaning liquid is ejected from a vertically long cleaning liquid jet nozzle header installed on the floor inside the hood. The technology regarding the apparatus which can wash | clean large machine parts, such as a roll chock of a rolling mill contaminated with dust and lubricating oil, by injecting into a component is disclosed. Further, in Patent Document 4, in cleaning large parts such as carts and engines, a robot having a cleaning liquid spray nozzle attached to a movable part is installed in a cleaning chamber, and the nozzle position is changed with respect to the large parts to supply high-pressure water. Techniques relating to devices that can be jetted and then cleaned with an air jet are disclosed. Furthermore, in Non-Patent Document 1, parts are cleaned by mechanically stripping off the oil by jet water flow or bubbling using the surface tension between water and oil caused by hot water at 60 ° C and the decrease in oil viscosity. Techniques relating to possible devices are disclosed. This apparatus has a configuration in which a rotary spear and a spray nozzle for generating a jet water flow are arranged in a cleaning tank, and three patterns of immersion jet water flow cleaning, immersion bubbling cleaning, or air jet cleaning can be selected. ing.
Japanese Patent Laid-Open No. 9-107662 Japanese Patent Laid-Open No. 3-18250 JP 54-146464 A JP-A-11-76955 Yokogawa Technical Report, Vol. 44, no. 2 (2000), p. 107-108

  However, in the cleaning method in which high-pressure cleaning liquid is sprayed on a large component or a stator coil or a rotor coil of an electric motor as disclosed in Patent Document 1, Patent Document 3, and Patent Document 4, a large component that is a material to be cleaned In addition, it is only possible to remove dirt such as oil and dust adhered and fixed to the surface of the stator coil or rotor coil of the electric motor. Therefore, in particular, there is a problem that dirt such as oil and dust adhered and fixed to the back surface (hollow inner surface side) of the rotor coil having a hollow inside cannot be completely removed.

  Moreover, the cleaning method combined with the submerged jet cleaning and the ultrasonic cleaning disclosed in Patent Document 2 has a better cleaning effect than the cleaning method disclosed in Patent Document 1 by using the ultrasonic cleaning. However, in order to obtain the effect of ultrasonic cleaning, it is necessary to provide an ultrasonic source near the material to be cleaned. Therefore, there is a problem that it is difficult to apply as a cleaning method for removing dirt such as oil and dust adhered and fixed to the back surface of the stator coil or rotor coil of the electric motor.

  Further, the method of cleaning using the cleaning device disclosed in Non-Patent Document 1 is considered to have an excellent cleaning effect, but when applied to cleaning of a stator coil or a rotor coil of an electric motor, Since the stator coil or rotor coil of the electric motor, which is the material to be cleaned, is large, it is necessary to install a large number of cleaning liquid injection nozzles and bubbling pipes close to the material to be cleaned, resulting in a problem that the installation cost increases. In addition, it is necessary to install a heater for heating the cleaning solution in which the coil is immersed, and since it is necessary to heat a large amount of cleaning solution for cleaning the stator coil or rotor coil of the electric motor, There were problems such as becoming enormous. In addition, there has been a problem that a large-scale device is required to rotate the cleaning drum containing the stator coil or rotor coil of the electric motor as the material to be cleaned.

  In addition, as described above in part, the cleaning methods disclosed in Patent Documents 1 to 4 and Non-Patent Document 1 directly spray high-pressure cleaning liquid on the material to be cleaned and adhere to the surface of the material to be cleaned.・ This is a method to mechanically remove the dirt such as fixed oil and dust. Here, since the insulators impregnated with resin or the like on glass tape, which are coated on the surfaces of the stator coil and rotor coil of the electric motor that is the material to be cleaned, have deteriorated over time. The strength is also reduced. For this reason, when a high-pressure cleaning liquid is directly sprayed on the material to be cleaned, the insulator of the material to be cleaned is damaged, resulting in a decrease in insulation. Therefore, there is a problem that it is not preferable as a cleaning method used for the insulation correction work of the stator coil and the rotor coil of the electric motor.

  Therefore, the present invention provides a simple and low-cost method for insulating the stator coil or rotor coil of the motor from dirt and dust adhered to and adhered to the front and back surfaces of the stator coil or rotor coil of the motor. It is an object of the present invention to provide a cleaning method and a cleaning device that can be effectively removed without damaging an object.

  In the present invention, at least a part of a stator coil or a rotor coil of an electric motor, which is a material to be cleaned, is immersed in a cleaning tank containing a cleaning solution, and is attached to the front and back surfaces of the material to be cleaned by a boiling cleaning solution. The present invention provides a method for cleaning a stator coil or a rotor coil of an electric motor by effectively removing dirt such as fixed oil and dust, and an apparatus capable of performing such cleaning. The type of the stator coil or rotor coil of the electric motor to which the cleaning method and the cleaning apparatus according to the present invention are applied is not particularly limited, but for example, a middle size or a large size for driving a rolling mill, a conveyance roller, etc. It can be suitably used when washing the stator coil or rotor coil of the motor. In addition, when the present invention is applied to cleaning of a stator coil or a rotor coil of a large motor, a part of the stator coil or rotor coil of the motor that is the material to be cleaned is immersed in the cleaning liquid, It is preferable to wash the material to be cleaned by rotating the stator coil or rotor coil of the immersed motor. A cleaning method and a cleaning device for a stator coil or a rotor coil of an electric motor that can clean a stator coil or a rotor coil of a large electric motor without installing a large-scale device by providing such a configuration are provided. can do.

  In the present invention, piping for supplying steam for boiling the cleaning liquid in the cleaning layer is provided on the bottom surface and / or the side surface inside the cleaning tank. Therefore, since the cleaning liquid can be boiled only by supplying steam into the pipe, it is possible to clean the stator coil or rotor coil of the electric motor with simple and low-cost equipment. Furthermore, in the present invention, since the stator coil or the rotor coil of the electric motor is cleaned using the cleaning liquid boiled with steam, the stator coil or the rotor coil of the electric motor can be cleaned mildly. Therefore, unlike the conventional method in which the cleaning liquid is sprayed directly onto the material to be cleaned, the present invention can clean the stator coil or rotor coil of the motor without damaging the insulator. become. In addition, in the present invention, the stator coil or rotor coil of the electric motor is immersed in the cleaning liquid, and the boiled cleaning liquid spreads evenly on the front and back surfaces of the stator coil or rotor coil of the electric motor. Therefore, according to the present invention, it is possible to effectively remove dirt such as oil and dust adhered and fixed to the details of the front and back surfaces of the stator coil or rotor coil of the electric motor.

  The present invention will be described below. In order to facilitate understanding of the present invention, reference numerals in the accompanying drawings are appended in parentheses, but the present invention is not limited to the illustrated embodiment.

  In the first aspect of the present invention, the electric motor coil (2) is immersed in the cleaning tank (1) containing the cleaning liquid (3), and the cleaning liquid (3) is supplied from the ejection means (4) provided in the cleaning tank (1). The above problem is solved by a method for cleaning an electric motor coil, characterized in that steam (7) is blown to boil the cleaning liquid (3).

  Here, in the present invention and the following invention, the motor coil means a stator coil or a rotor coil of the motor. Further, the jetting means (4) in the present invention and the following invention is not particularly limited as long as it is a means capable of blowing steam into the cleaning liquid (3), and specific examples thereof include a hole for steam jetting. And the like.

  In the second aspect of the present invention, a part of the motor coil (10) is immersed in the cleaning tank (1) containing the cleaning liquid (3), and the cleaning liquid (4) is provided from the ejection means (4) provided in the cleaning tank (1). 3) by blowing steam (7), boiling the cleaning liquid (3), rotating the motor coil (10), and sequentially moving the parts to be immersed and cleaned, by the motor coil cleaning method, Solve the above problems.

  In the first and second aspects of the present invention, it is preferable to blow high pressure air into the cleaning liquid (3) in addition to blowing the steam (7).

  In the first and second aspects of the present invention, the vapor (7) and / or the high-pressure air is preferably ejected from the lower part and / or the side part in the cleaning tank (1).

  The third aspect of the present invention is a cleaning device (100) for cleaning the electric motor coil (2), the cleaning tank (1) containing the cleaning liquid (3), the bottom of the inner surface of the cleaning tank (1) and / or The motor coil cleaning device (100) provided on the side surface is provided with means (4a) for blowing steam (7) into the cleaning liquid (3).

  The fourth aspect of the present invention is a cleaning device (200) for cleaning the motor coil (10), the cleaning tank (1) containing the cleaning liquid (3), the bottom of the inner surface of the cleaning tank (1) and / or A motor coil comprising a means (4a) for blowing steam (7) into the cleaning liquid (3) and a rotating means (12) for rotating the motor coil (10) provided on a side surface. The above problem is solved by the cleaning device (200).

  In the third and fourth aspects of the present invention, it is preferable to further include means (4b) for blowing high-pressure air into the cleaning liquid (3) in addition to the means (4a) for blowing steam.

According to 1st this invention, the vapor | steam (7) supplied in the ejection means (4) provided in the washing tank (1) is blown in into the washing | cleaning liquid (3), and washing | cleaning liquid (3) is injected | emitted. Heat to boiling. Here, in the process of heating and boiling the cleaning liquid (3), dirt such as oil and dust adhered and fixed to the front and back surfaces of the motor coil (2) immersed in the cleaning liquid (3), and the motor coil The adhesion / adhesion force between the front and back surfaces of (2) is reduced. Therefore, according to 1st this invention, it becomes possible to remove effectively the said stain | pollution | contamination with which the adhesion and adhering force with the surface and back surface of an electric motor coil (2) fell by the boiled washing | cleaning liquid (3). Become.
In addition, in the first aspect of the present invention, the cleaning liquid (3) is stirred in the process of being heated and spreads to every corner of the electric motor coil (2). 7) Bubbles are generated by the bubbles (9). Therefore, it becomes possible to spread bubbles of the cleaning liquid (3) to the details of the front and back surfaces of the motor coil (2) immersed in the cleaning liquid (3), and as a result, adhere to and adhere to the motor coil (2). It is possible to more effectively remove (mechanically remove) dirt such as oil and dust. On the other hand, in the first aspect of the present invention, since the motor coil (2) is cleaned using the boiling cleaning liquid (3), the high-pressure cleaning liquid is not directly injected into the motor coil (2). Therefore, the motor coil (2) can be cleaned without damaging the insulator of the motor coil (2). In the first aspect of the present invention, the cleaning liquid (3) is boiled only by supplying the vapor (7) to the ejection means (4) provided in the cleaning tank (1), and the boiling cleaning liquid (3) is used. The motor coil (2) is cleaned. Therefore, the present invention can be implemented easily and at low cost. Therefore, according to the first aspect of the present invention, dirt such as oil and dust adhered to and adhered to the front and back surfaces of the motor coil can be effectively removed easily and at low cost without damaging the insulator of the motor coil. It is possible to provide a method for cleaning an electric motor coil.

  According to the second aspect of the present invention, a part of the motor coil (10) is immersed in the cleaning liquid (3), and the motor coil (10) can be rotated using the rotating means (12). Therefore, according to the present invention, even when cleaning a large motor coil (10), the cleaning liquid (3) is rotated by rotating the motor coil (10) partially immersed in the cleaning liquid (3). It is possible to move the portion of the electric motor coil (10) that is immersed in (). Therefore, according to the second aspect of the present invention, a cleaning tank having a size capable of immersing the entire large motor coil (10) is prepared even when the large motor coil (10) is cleaned. In addition, it is possible to provide a method for cleaning an electric motor coil that can remove dirt such as oil and dust adhered and fixed to the front and back surfaces of the electric motor coil (10).

In the first and second aspects of the present invention, in addition to blowing the vapor (7) into the cleaning liquid (3), the high-pressure air is further blown into the cleaning liquid (3), thereby boiling the cleaning liquid (2). There can be air bubbles inside. That is, since it becomes possible to reduce the frequency with which the bubbles (9) of the steam (7) are in direct contact with the insulator of the motor coil (2, 10), an insulator with poor heat resistance can be obtained by blowing high-pressure air. Even if it is an electric motor coil (2, 10) provided with this, it becomes possible to provide the cleaning method of an electric motor coil which can be cleaned suitably.
In addition to the steam (7), when high-pressure air is blown into the cleaning liquid (3), the timing of blowing high-pressure air is not particularly limited. The high-pressure air may be flowed after boiling the cleaning liquid (3) with steam (7). However, before the cleaning liquid (3) boils, the high-pressure air bubbles are used to reserve the motor coil (2). From the viewpoint of enabling cleaning, it is preferable to blow high-pressure air before the cleaning liquid (3) boils. As a specific example of the timing before the cleaning liquid (3) is boiled, a mode in which high-pressure air is blown from a jetting means different from the jetting means for blowing steam at the same time as the steam (7) can be exemplified.

  Moreover, in said 1st this invention and 2nd this invention, a steam (7) and / or high pressure air are blown in from the lower part and / or side part side in a washing tank (1), and an electric motor coil (2) It is easy to effectively utilize the bubbles of steam (7) and / or the bubbles of air.

  According to the motor coil cleaning apparatus (100) of the third aspect of the present invention, means (4a) for blowing steam (7) is provided on the bottom and / or side surface of the inner surface of the cleaning tank (1). Therefore, if the cleaning apparatus (100) according to the third aspect of the present invention is used, the cleaning liquid (3) is placed in the cleaning tank (1), the motor coil (2) is immersed in the cleaning liquid (3), and then The cleaning liquid (3) can be boiled by the steam (7) ejected from the blowing means (4a). By doing in this way, it becomes possible to set it as the washing | cleaning apparatus (100) which can boil the washing | cleaning liquid (3) with a simple and low-cost installation. Therefore, according to the third aspect of the present invention, dirt such as oil and dust adhered and fixed to the front and back surfaces of the motor coil (2) is damaged easily and at low cost. It becomes possible to set it as the washing | cleaning apparatus (100) of an electric motor coil which can be removed effectively without this. In addition, although the usage method of the washing | cleaning apparatus (100) of the motor coil concerning 3rd this invention is not limited, It can use suitably when implementing the said 1st this invention especially.

  According to the motor coil cleaning device (200) of the fourth aspect of the present invention, means (4a) for blowing steam (7) is provided on the bottom and / or side surface of the inner surface of the cleaning tank (1), and Rotating means (12) for rotating the motor coil (10) is provided. Therefore, when the cleaning device (200) according to the fourth aspect of the present invention is used, for example, when the motor coil (10) is large, the motor coil (10) is added to the cleaning liquid (3) placed in the cleaning tank (1). After the part of 10) is immersed, the cleaning liquid (3) is boiled, and the coil (10) can be cleaned while moving the immersion part while rotating using the boiling cleaning liquid (3). By doing so, dirt such as oil and dust adhered and fixed to the front and back surfaces of the large motor coil (10) can be easily and at low cost without damaging the insulator of the motor coil (10). It becomes possible to set it as the washing | cleaning apparatus (200) of an electric motor coil which can be removed effectively. In addition, although the usage method of the washing | cleaning apparatus (200) of the motor coil concerning the 4th this invention is not limited, It can use suitably when implementing the said 2nd this invention especially.

  In the third and fourth aspects of the present invention, in addition to the means for blowing steam (4a), in addition to the high pressure air blowing means (4b), the motor coil cleaning device (300) is used for cleaning. It becomes possible to set it as the washing | cleaning apparatus (300) which can make an air bubble exist in the washing | cleaning liquid (3) put into the tank (1). Therefore, since it becomes possible to reduce the frequency with which the bubble (9) of the steam (7) directly contacts the insulator of the motor coil (2, 10), the motor coil (2, 10), it is possible to provide a motor coil cleaning device (300) that can be suitably cleaned.

Hereinafter, embodiments of the present invention will be described.
FIG. 1 is an external view schematically showing a method for cleaning an electric motor coil according to a first embodiment of the present invention. In FIG. 1, the vertical direction is the vertical direction, and the horizontal direction is the horizontal direction. In addition, the arrow in FIG. 1 represents the direction through which steam flows.

  In FIG. 1, a medium-sized electric motor coil (hereinafter referred to as “rotor coil”) 2 is immersed in a cleaning liquid 3 in a cleaning tank 1. The medium-sized rotor coil 2 is placed on the cradles 5 and 5, and below the rotor coil 2, a pipe 4 (hereinafter referred to simply as “pipe”) as a jetting means to which steam 7 is supplied. 4 ”) is arranged. In the method for cleaning an electric motor coil according to the present invention, the steam 7 supplied into the pipe 4 is blown into the cleaning liquid 3 from the holes 8 provided in the pipe 4, and the cleaning liquid 3 is heated and boiled. . When the cleaning liquid 3 is heated by the steam 7, dirt such as oil and dust adhered to and adhered to the rotor coil 2 and the front and back surfaces of the rotor coil 2 is warmed, and dirt such as oil and dust and the rotor are heated. The adhesion / adhesion force between the front and back surfaces of the coil 2 is reduced, and dirt is easily removed from the front and back surfaces of the rotor coil 2. On the other hand, as the cleaning liquid 3 is heated, convection increases and is stirred, and when boiled, bubbles are generated due to the bubbles 9 of the steam 7. For this reason, when the cleaning liquid 3 is boiled with the steam 7, it is possible to easily remove (mechanically remove) the dirt whose adhesion / fixing force is reduced by the boiling cleaning liquid 3. Here, the bubbles generated in the boiling cleaning liquid 3 reach the details of the front and back surfaces of the rotor coil 2 with the convection of the cleaning liquid 3. On the other hand, as described above, the adhesion / fixing force of the dirt adhered / fixed to the rotor coil 2 immersed in the boiled cleaning liquid 3 is reduced. Therefore, by boiling the cleaning liquid 3 with the steam 7, it is possible to effectively remove the dirt adhered to and adhered to the details of the front and back surfaces of the rotor coil 2. Furthermore, in this invention, the piping 4 provided with the hole 8, 8, ... for vapor | steam blowing out in the washing tank 1 is provided as an ejection means, and the washing | cleaning liquid 3 is boiled only by supplying a vapor | steam in the said piping 4. FIG. . Therefore, according to the method for cleaning an electric motor coil according to the present invention, it is possible to effectively remove the contamination of the electric motor coil at a simple and low cost.

  Further, as shown in FIG. 1, in the method for cleaning an electric motor coil according to the present invention, the cleaning liquid 3 is boiled using the steam 7, and bubbles generated in the boiling cleaning liquid 3 are used to adhere and adhere to the rotor coil 2. Removed dirt. Therefore, unlike the conventional cleaning method, the high-pressure cleaning liquid is not directly injected into the rotor coil. Therefore, according to the method for cleaning an electric motor coil of the present invention, the coil 2 can be cleaned without damaging the insulator covered with the coil 2 that has deteriorated due to secular change. In addition, according to the method for cleaning an electric motor coil of the present invention, dirt adhered to and adhered to the details of the front and back surfaces of the rotor coil 2 can be effectively removed. The coil 2 can maintain a high insulation resistance value over a long period of time. Therefore, even when the rotor coil 2 is used for a long period of time, it is possible to prevent a motor burnout accident. In the present invention, since the high-pressure cleaning liquid is not directly jetted, the ability of mechanically removing dirt may be inferior to that of the prior art. However, in the present invention, by removing the dirt using the boiled cleaning liquid 3, the dirt having a lower adhesion / fixing force than that of the prior art is removed. Therefore, according to the present invention, it is possible to ensure a dirt removal capability equal to or higher than that of the conventional method.

  Here, an outline of the difference between the cleaning method according to the present invention in which the rotor coil is immersed in the cleaning liquid and the conventional cleaning method in which the rotor coil is cleaned by directly spraying the cleaning liquid will be described with reference to the drawings. . FIG. 2 schematically shows a cross section of the rotor coil. FIG. 2A is a diagram schematically showing a part of a cross section of the rotor coil 2, and FIG. 2B is a schematic diagram showing only a portion surrounded by a solid line in FIG. 2A in an enlarged manner. FIG. Further, FIG. 3 (a) schematically shows how the rotor coil shown in FIG. 2 (b) is cleaned by a conventional method, and FIG. 3 (b) schematically shows how the rotor coil shown in FIG. 2 (b) is cleaned. . 2A and 2B and FIGS. 3A and 3B, the horizontal direction in the figure is the longitudinal direction of the axis of the rotor coil.

  As shown in FIG. 2B, the rotor coil 30 includes a commutator riser 31, a commutator 32, a bind wire 33, and the like, and dirt 35, 35,... Adhered and fixed. As shown in FIG. 3A, in the conventional cleaning method, since the cleaning liquids 36, 36,... Are directly sprayed onto the rotor coil 30, the dirt 35 adhering and adhering to the surface of the coil 30 can be removed. On the other hand, since the cleaning liquids 36, 36,... Are difficult to reach on the back surface of the coil 30, the dirt 35 tends to remain on the back surface of the coil 30.

  On the other hand, as shown in FIG. 3B, in the cleaning method according to the present invention, the coil 30 is immersed in the cleaning liquid 36, so that the cleaning liquid 36 easily spreads to the front and back surfaces of the coil 30. Therefore, unlike the conventional cleaning method shown in FIG. 3A, according to the cleaning method of the present invention shown in FIG. 3B, in addition to the dirt adhered and fixed to the surface of the coil 30, the coil 30. It is possible to effectively remove dirt adhered to and adhered to the back surface of the film.

FIG. 4 is an external view schematically showing the motor coil cleaning apparatus according to the first embodiment of the present invention. In FIG. 4, the vertical direction is the vertical direction, and the horizontal direction is the horizontal direction.
As shown in FIG. 4, the motor coil cleaning apparatus 100 according to the present invention includes a cleaning tank 1, a pipe 4 provided on the inner bottom surface of the cleaning tank 1, and a cradle 5 on which the motor coil is to be placed. And 5. Therefore, the cleaning liquid is put into the cleaning tank 1 of the cleaning device 100 shown in FIG. 4, the motor coil is placed on the cradles 5 and 5, and steam is supplied to the pipe 4 from a steam supply source (not shown), If the steam is blown into the cleaning liquid, the motor coil cleaning apparatus 100 can be suitably used in the motor coil cleaning method according to the first embodiment of the present invention.

  FIG. 5 is an external view schematically showing a method for cleaning an electric motor coil according to a second embodiment of the present invention. In FIG. 5, the vertical direction is the vertical direction, and the horizontal direction is the horizontal direction. In addition, the arrow in FIG. 5 represents the direction through which steam flows.

  As shown in FIG. 5, the large rotor coil 10 is placed on cradles 11, 11 arranged outside the cleaning tank 1, and a part of the rotor coil 10 is in the cleaning tank 1. Soaked in the cleaning liquid 3. Further, the rotor coil 10 can be rotated using the rotating means 12. In FIG. 5, the same components as those in FIG.

  When cleaning a large rotor coil using the motor coil cleaning method according to the second embodiment of the present invention, as shown in FIG. The rotated rotor coil 10 is rotated. By doing in this way, it becomes possible to move sequentially the part of the rotor coil 10 wash | cleaned with the washing | cleaning liquid 3 which boiled. That is, the part of the rotor coil 10 from which the dirt has been removed by the boiling cleaning liquid 3 is moved out of the cleaning liquid 3, and the part of the rotor coil 10 from which the dirt has not yet been removed is moved into the cleaning liquid 3. Thus, the rotor coil 10 can be rotated. Therefore, according to the present embodiment, a method for cleaning an electric motor coil that can effectively remove dirt such as oil and dust adhered and fixed to the front and back surfaces of the large rotor coil 10 is provided. Is possible.

FIG. 6 is an external view schematically showing a motor coil cleaning apparatus according to a second embodiment of the present invention. In FIG. 6, the vertical direction is the vertical direction, and the horizontal direction is the horizontal direction.
As shown in FIG. 6, the motor coil cleaning apparatus 200 according to the present invention includes a cleaning tank 1, a pipe 4 provided in the cleaning tank 1, and a cradle 11 disposed outside the cleaning tank 1, 11 and rotating means 12 for rotating the motor coil. Therefore, the cleaning liquid is put into the cleaning tank 1 of the cleaning apparatus 200 shown in FIG. 6, the motor coil is placed on the cradle 11, 11, the motor coil is rotated by the rotating means 12, and steam is further supplied to the pipe 4. If the steam is blown into the cleaning liquid, the motor coil cleaning apparatus 200 can be suitably used in the motor coil cleaning method according to the second embodiment of the present invention.

  FIG. 7 is a vertical sectional view taken along line VII-VII of the cleaning tank 1 in FIG. 5, and schematically shows the arrangement of the piping 4 and the rotor coil 10 in the cleaning tank 1. FIG. 8 schematically shows a vertical sectional view of the motor coil cleaning apparatus according to the third embodiment of the present invention. FIG. 8 is a cross-sectional view of the motor coil cleaning device according to the third embodiment of the present invention from the same direction as FIG. Here, the motor coil cleaning device according to the third embodiment of the present invention is the same as the motor coil cleaning device according to the second embodiment, except that a pipe for flowing high-pressure air is provided in addition to the pipe for flowing steam. It is a form. 7 and 8, for easy understanding, a cleaning liquid is put in the cleaning tank, a part of the rotor coil is immersed in the cleaning liquid, and a state in which steam and / or high-pressure air is blown out from the pipe is shown. ing. 7 and 8, the same components as those in FIG. 5 are denoted by the same reference numerals, and the description thereof is omitted. The present invention will be described below with reference to FIGS. 7 and 8 as appropriate.

  In the motor coil cleaning apparatus of the present invention according to the second embodiment shown in FIG. 7, the cleaning tank 1 is provided with two pipes 4, 4, and the pipes 4, 4 have steam 7. Flowing. On the other hand, in the cleaning apparatus 300 of the present invention according to the third embodiment shown in FIG. 8, four pipes 4a, 4a, 4b, 4b are provided inside the cleaning tank 1, and the two outside pipes are provided. While steam 7 flows inside 4a, 4a, high-pressure air flows inside the two inner pipes 4b, 4b.

  When the motor coil is cleaned using the cleaning device of the present invention according to the second embodiment shown in FIG. 7, bubbles due to the bubbles 9 of the steam 7 are generated in the cleaning liquid 3, and the bubbles are generated in the rotor coil 10. The dirt adhered to and adhered to the front and back surfaces is removed by reaching the details of the front and back surfaces. In the cleaning apparatus according to the present embodiment, the positions where the pipes 4 and 4 are provided are not particularly limited, but the thermal deterioration of the coil insulator is prevented by preventing bubbles of the vapor 7 from directly hitting the coil 10. From the viewpoint, it is preferable to arrange the pipes 4 and 4 at positions away from the coil 10. Also, the positions of the holes provided in the pipes 4 and 4 are not particularly limited, but from the viewpoint of preventing thermal deterioration of the coil insulator, the holes are formed at positions where the vapor bubbles do not directly face the coil 2. It is preferable to provide it.

  On the other hand, when the motor coil is cleaned using the cleaning device 300 of the present invention according to the third embodiment shown in FIG. 8, bubbles caused by bubbles of the steam 7 and high-pressure air are generated in the cleaning liquid 3, Such bubbles spread to the details of the front and back surfaces of the rotor coil 10 to remove the dirt adhered and fixed to the front and back surfaces. That is, when the motor coil is cleaned using the cleaning device 300 of the present invention according to the third embodiment, bubbles of high pressure air are present in the cleaning liquid 3, so that the bubbles 9 of the vapor 7 directly touch the coil 10. The frequency can be reduced. Therefore, according to the present embodiment, it is possible to provide a motor coil cleaning device 300 and a cleaning method that can be suitably cleaned even with a motor coil including an insulator having poor heat resistance.

  In the cleaning apparatus 300 according to the present embodiment, the positions where the pipes 4a, 4a, 4b, and 4b are provided are not particularly limited, but effective for contamination attached to the coil while preventing thermal deterioration of the coil insulator. From the viewpoint of enabling removal, it is preferable that the pipes 4b and 4b for flowing high-pressure air are arranged closer to the coil 10 than the pipes 4a and 4a for flowing steam. Moreover, it is preferable to arrange | position the piping 4a and 4a which let the vapor | steam 7 from the viewpoint of preventing thermal deterioration of a coil insulator in the position away from the coil 2 rather than piping 4b and 4b. Further, the positions of the holes provided in the pipes 4a, 4a, 4b, and 4b are not particularly limited, but it is possible to effectively remove dirt adhered to the coil while preventing thermal deterioration of the coil insulator. In view of the above, it is preferable that the pipes 4b and 4b through which the high-pressure air is passed are provided with holes at positions where the bubbles of the high-pressure air are directed directly to the coil 2. In addition, from the viewpoint of preventing thermal deterioration of the coil insulator, it is preferable to provide holes in the pipes 4a and 4a through which the steam 7 passes at positions where the bubbles of the steam do not directly face the coil 2.

  In the present invention, the size and interval of the holes 8, 8,... Provided in the pipe 4 are not particularly limited, but the size of the holes 8, 8,. It is preferable to be 1 mm or more. From the viewpoint of effectively using steam, the size of the holes 8, 8,... Is preferably 50 mm or less. Further, from the viewpoint of reducing stirring unevenness, the distance between the holes 8, 8,.

  In this invention, the temperature of the vapor | steam 7 supplied to the piping 4a in the washing tank 1 is not specifically limited. Here, the electric motor that is the material to be cleaned according to the present invention is formed of a plurality of parts or materials such as a coil, an iron core, and an insulator, and each of these members has different specific heat or thermal expansion coefficient. Have. For this reason, it is preferable that the temperature rise of the cleaning liquid and the coil is moderate from the viewpoint of effectively removing the dirt of the electric motor including the various members. Therefore, the temperature of the steam 7 supplied to the pipe 4a in the cleaning tank 1 is about 150 ° C. (temperature in the main pipe connected to the pipe 4a) from the viewpoint of moderately increasing the temperature of the cleaning liquid 3 and the coil 2. It is preferable to do.

  In the present invention, the pressure of the steam 7 supplied to the pipe 4a and the pressure of the high-pressure air supplied to the pipe 4b are not particularly limited, but the pressure is 0 from the viewpoint of ensuring the stirring ability. It is preferable that it is 3 MPa or more. In addition, from the viewpoint of enabling effective cleaning of various types of electric motors, it is preferable that the pressure of the vapor supplied to the pipe 4a in the cleaning tank 1 be adjusted by a valve or the like.

  Furthermore, the cleaning liquid used in the present invention is not particularly limited as long as it is a non-foaming cleaning liquid that can effectively remove dirt such as oil and dust adhered and fixed to the motor coil. Water or the like can be preferably used. Moreover, when using water as a washing | cleaning liquid, you may mix a detergent in this water. Examples of the detergent that can be used in the present invention include an oil and fat cleaning agent. Moreover, when using detergent, the usage-amount of the detergent is not specifically limited, For example, when using the oil crusher by Yanagi Laboratories, Inc. as a detergent, the density | concentration is 3 to 5%. It is preferable to set the degree.

<Example 1>
FIG. 1 schematically shows a motor coil cleaning apparatus and method according to a first embodiment. FIG. 1 is an external view schematically showing how a rotor coil of a small and medium-sized motor is cleaned by the motor coil cleaning apparatus and cleaning method according to the present invention.

In the present embodiment, the cleaning tank 1 having a size of 1.2 m in length, 2.0 m in width, and 1.5 m in height is filled with 1 m ³ of water as the cleaning liquid 3, and the cleaning liquid 3 has a concentration of 3%. A detergent (an oil crusher manufactured by Yanagi Laboratories Co., Ltd.) was mixed. Then, the rotor coils (motor capacity 58 kW, coil portion 400 mm diameter × 300 mm width, total length 1000 mm) 2 were placed on the cradles 5 and 5, and the rotor coil 2 was immersed in the cleaning liquid 3 of the cleaning tank 1. . In addition, two pipes 4 having an inner diameter of 20 mm and a length of 1.2 m are provided at the bottom inside the cleaning tank 1 according to the present embodiment. Steam 7 (temperature 150 ° C., pressure 0.392 MPa in the main pipe connected to the pipes 4, 4) flows through the pipes 4, 4, and steam ejection holes 8, 8 provided in the pipes 4, 4. The cleaning liquid 3 was heated by blowing steam 7 at a flow rate of 10 m ³ / min into the cleaning liquid 3. In this embodiment, the hole diameters and intervals of the steam ejection holes 8, 8,... Are 1 mm and 100 mm, respectively, and the steam ejection holes 8, 8,. Provided.
When the cleaning liquid 3 was heated under such conditions, the cleaning liquid 3 boiled 10 minutes after the start of blowing the steam 7. In this embodiment, the rotor coil 2 was cleaned by continuing to flow the steam 7 having the same flow rate as described above for 6 hours even after the cleaning liquid 3 was boiled.

  After completion of the cleaning, the rotor coil 2 was taken out from the cleaning tank 1 and the cleaning condition was visually confirmed. As a result, no dirt such as oil or dust remained on the front and back surfaces of the rotor coil 2. Therefore, according to this invention, it was confirmed that the dirt of an electric motor coil can be removed effectively.

<Example 2>
FIG. 5 schematically shows a motor coil cleaning apparatus and method according to the second embodiment. FIG. 5 is an external view schematically showing how a rotor coil of a large motor is cleaned by the motor coil cleaning apparatus and method according to the present invention.

In this example, the cleaning tank 1 having a size of 4 m long × 8 m wide × 1.5 m high is filled with 15 m ³ of water as the cleaning liquid 3, and the cleaning liquid 3 has a concentration of 3%. A detergent (oil crusher manufactured by Yanagi Laboratories Co., Ltd.) was mixed. A rotor coil (motor capacity 3360 kW × 2, coil portion 2000 mm diameter × 1200 mm width, total length 11000 mm) 10 is placed on the cradle 11, 11, and a part of the rotor coil 10 is placed in the cleaning tank 1. It was immersed in the cleaning liquid 3. In addition, two pipes 4 having an inner diameter of 40 mm and a length of 7 m are provided on the inner bottom of the cleaning tank 1 according to the present embodiment. Steam 7 (temperature 150 ° C., pressure 0.392 MPa in the main pipe connected to the pipes 4, 4) flows through the pipes 4, 4, and steam ejection holes 8, 8 provided in the pipes 4, 4. The cleaning liquid 3 was heated by blowing steam 7 having a flow rate of 30 m ³ / min into the cleaning liquid 3. In this embodiment, the hole diameters and intervals of the steam ejection holes 8, 8,... Are 2 mm and 200 mm, respectively, and the steam ejection holes 8, 8,. Provided.
When the cleaning liquid 3 was heated under these conditions, the cleaning liquid 3 boiled 120 minutes after the start of blowing the steam 7. In addition, in this embodiment, after the cleaning liquid 3 is boiled, the rotor coil 10 is cleaned while the rotor coil 10 is automatically rotated using the rotating means 12 so as to have a speed of about 1 rotation / minute. It was. In this embodiment, the rotor coil 10 was cleaned by continuing to flow the steam 7 having the same flow rate as described above for 14 hours even after the cleaning liquid 3 was boiled.

  After completion of the cleaning, the rotor coil 10 was taken out of the cleaning tank 1 and the cleaning condition was visually confirmed. As a result, no dirt such as oil or dust remained on the front and back surfaces of the rotor coil 2. Therefore, according to this invention, it was confirmed that the dirt of an electric motor coil can be removed effectively.

<Example 3>
FIG. 8 schematically shows a cleaning apparatus and a cleaning method for a rotor coil according to the third embodiment. FIG. 8 is a cross-sectional view of the rotor coil viewed from the longitudinal direction of the axis of the rotor coil. In addition to the cleaning apparatus and the cleaning method according to the second embodiment, the cleaning apparatus and the cleaning method according to the third embodiment are further provided with two high-pressure air pipes to clean the rotor coil using the high-pressure air. This is different from the second embodiment. That is, the cleaning apparatus and the cleaning method according to the present embodiment have many common parts with the second embodiment. Therefore, the cleaning apparatus and the cleaning method according to the present embodiment will be described with reference to FIGS. 8 and 5 as appropriate.

In this example, the cleaning tank 1 having a size of 4 m in length, 8 m in width, and 1.5 m in height is filled with 15 m ³ of water as the cleaning liquid 3, and the cleaning liquid 3 has a concentration of 3%. A detergent (oil crusher manufactured by Yanagi Laboratories Co., Ltd.) was mixed. A rotor coil (motor capacity 3360 kW × 2, coil portion 2000 mm diameter × 1200 mm width, total length 11000 mm) 10 is placed on the cradle 11, 11, and a part of the rotor coil 10 is placed in the cleaning tank 1. It was immersed in the cleaning liquid 3. In addition, four pipes 4 having an inner diameter of 40 mm and a length of 7 m are provided on the bottom inside the cleaning tank 1 according to the present embodiment. Steam 7 (temperature of 150 ° C. and pressure of 0.392 MPa in the main pipe connected to the pipes 4a and 4a) flows through the pipes 4a and 4a arranged at positions away from the coil 10, and the pipes 4a and 4a. The steam 7 having a flow rate of 30 m ³ / min was blown into the cleaning liquid 3 from the steam ejection holes 8, 8,. In this embodiment, the diameters and intervals of the steam ejection holes 8, 8,... Are 2 mm and 200 mm, respectively, and the steam ejection holes 8, 8,. One by one.
When the cleaning liquid 3 was heated under these conditions, the cleaning liquid 3 boiled 120 minutes after the start of blowing the steam 7. In addition, also in this embodiment, after the cleaning liquid 3 is boiled, the rotor coil 10 is cleaned while the rotor coil 10 is automatically rotated using the rotating means 12 so as to have a speed of about 1 rotation / minute. It was. In this embodiment, the rotor coil 10 was cleaned by continuing to flow the steam 7 having the same flow rate as described above for 14 hours even after the cleaning liquid 3 was boiled.

Furthermore, in this embodiment, simultaneously with the injection of the steam 7 into the cleaning liquid 3 into the pipes 4b and 4b arranged near the coil 10, the pressure 0. 0 in the main pipe connected to the pipes 4b and 4b is reduced. 392 MPa). High-pressure air with a flow rate of 25 m ³ / min was blown into the cleaning liquid 3 from high-pressure air ejection holes provided in the pipes 4 b and 4 b so that the high-pressure air bubbles hit the rotor coil 10. In this example, the diameters and intervals of the high-pressure air ejection holes were 2 mm and 200 mm, respectively, and 35 x 2 rows of such high-pressure air ejection holes were provided on the upper side of the pipes 4b and 4b.

  After completion of the cleaning, the rotor coil 10 was taken out of the cleaning tank 1 and the cleaning condition was visually confirmed. In this embodiment, the steam 7 and the high-pressure air are simultaneously blown into the cleaning liquid 3 to perform preliminary cleaning of the rotor coil 10 using the high-pressure air before the cleaning liquid 3 boils. No dirt such as oil or dust remained on the front and back surfaces. Therefore, according to this invention, it was confirmed that the dirt of an electric motor coil can be removed effectively.

It is an external view which shows roughly the washing | cleaning method of the electric motor coil concerning 1st Embodiment of this invention. It is sectional drawing which shows a rotor coil schematically. It is sectional drawing which shows a rotor coil schematically. 1 is an external view schematically showing a motor coil cleaning apparatus according to a first embodiment of the present invention. FIG. It is an external view which shows roughly the washing | cleaning method of the motor coil concerning 2nd Embodiment of this invention. It is an external view which shows roughly the washing | cleaning apparatus of the motor coil concerning 2nd Embodiment of this invention. It is sectional drawing which shows schematically the washing | cleaning apparatus of the motor coil concerning 2nd Embodiment of this invention. It is sectional drawing which shows schematically the washing | cleaning apparatus of the motor coil concerning 3rd Embodiment of this invention.

Explanation of symbols

1 Washing tank 2, 10, 30 Electric motor coil (rotor coil)
3, 36 Cleaning fluid 4, 4a, 4b Piping 5, 11 Receiving base 7 Steam 8 hole (steam ejection hole)
12 Rotating means 100, 200, 300 Cleaning device for motor coil

Claims (7)

A method for cleaning an electric motor coil, comprising immersing an electric motor coil in a cleaning tank containing a cleaning liquid, and blowing steam into the cleaning liquid from a jetting means provided in the cleaning tank to boil the cleaning liquid. Immerse a part of the motor coil in the cleaning tank containing the cleaning liquid, blow the steam into the cleaning liquid from the jetting means provided in the cleaning tank, rotate the motor coil while boiling the cleaning liquid, and immerse A method of cleaning an electric motor coil, characterized by sequentially moving a portion to be cleaned. The motor coil cleaning method according to claim 1, wherein high-pressure air is further blown into the cleaning liquid in addition to the steam blowing. The method of cleaning an electric motor coil according to any one of claims 1 to 3, wherein the jetting of the steam and / or the high-pressure air is performed from a lower part and / or a side part in the cleaning tank. A cleaning device for cleaning a motor coil,
An apparatus for cleaning an electric motor coil, comprising: a cleaning tank for containing a cleaning liquid; and means for blowing steam into the cleaning liquid provided at a bottom and / or a side surface of the inner surface of the cleaning tank. A cleaning device for cleaning a motor coil,
A cleaning tank for storing a cleaning liquid, a means for blowing steam into the cleaning liquid, and a rotating means for rotating the motor coil, provided at the bottom and / or the side surface of the inner surface of the cleaning tank. , Motor coil cleaning device. The motor coil cleaning apparatus according to claim 5 or 6, further comprising means for blowing high-pressure air into the cleaning liquid in addition to the means for blowing the steam.

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