JPH0515665U - Device for measuring temperature of commutator in rotating electric machine - Google Patents

Abstract

(57) [Summary] [Purpose] To make it possible to easily measure the temperature of a commutator without stopping the rotating electrical machine. [Structure] The heat-sensitive paint 20 is applied to a portion of the surface of the commutator 1 of the rotating electric machine, where the brush is not provided, over a suitable width. In this case, it is possible to use a plurality of types of heat-sensitive paints having different detected temperatures which are in a discolored state, and apply these heat-sensitive paints so as to form a plurality of rows in the circumferential direction on the surface of the commutator. desirable. Further, as the heat-sensitive paint, one kind of heat-sensitive paint whose color that changes depending on the detected temperature may be used.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 In rotating electrical machines with commutators such as DC machines, the damage of the commutator is prevented by measuring the temperature of the commutator during operation. The present invention relates to a commutator temperature measuring device in a rotating electric machine used for such a purpose.

[0002]

[Prior Art]

4 and 5 are vertical front views showing the main part of the commutator 1 of the rotating electric machine, 2 is a commutator piece, 3 is a V-shaped tightening ring, 4 is a conical mica insulation, 5 is a commutator barrel, 6 Is a riser. In the above configuration, the conventional case, as shown in FIG. 4 or FIG. 5, the thermocouple by the rotary electric machine of the commutator 1 commutator segment 2 of the surface in advance putty 7 or 9 clerk in part the brush does not slide to The shape-type thermometer 8 or the rod-shaped mercury thermometer 10 is fixedly attached, and the display of the scales of those thermometers 8 and 10 is temporarily stopped by the attendant and the commutator 1 at that time is read by the staff. I was measuring temperature.

[0003]

[Problems to be solved by the device]

 By the way, in the case of the method of measuring the temperature of the commutator by visually observing the display of such a thermometer, the temperature can be measured accurately, but the target rotating electrical machine is stopped one by one each time the temperature is measured. There was a need. For this reason, it is not only complicated when measuring the temperature of the commutator for a large number of DC machines, but it may not be practically possible to measure the temperature of the commutator. There is a problem that it is difficult to take appropriate measures against loss. An object of the present invention is to provide a commutator temperature measuring device for a rotary electric machine, which solves such a problem (problem) of the conventional one.

[0004]

[Means for Solving the Problems]

 The present invention relates to a commutator temperature measuring device in a rotating electric machine, in which a heat-sensitive paint is applied over a portion of the commutator surface of the rotating electric machine that is not opposed to the brush over a suitable width. In this case, as the above-mentioned thermal paint, it is possible to use a plurality of types of thermal paints having different detected temperatures which are in a discolored state, and apply these thermal paints so as to form multiple rows in the circumferential direction on the surface of the commutator. desirable. Further, as the heat-sensitive paint, one kind of heat-sensitive paint whose color changing depending on the detected temperature may be used.

[0005]

[Action]

 In the present invention, since the heat-sensitive paint is applied to the surface of the commutator, the commutator can be observed by the staff to visually check the discoloration degree of the part to which the heat-sensitive paint is applied, without stopping the operation of the rotating electric machine. The temperature of can now be measured. In this case, as the thermal paint to be applied to the commutator, a plurality of types of thermal paint with different detected temperatures that cause discoloration are used, and these thermal paints are applied to the surface of the commutator in the circumferential direction so as to form multiple rows. With this method, it is possible to measure the time course of the temperature change of the commutator stepwise. Also, when using one type of thermal paint whose color changes with temperature, it is possible to know the time course of the temperature of the commutator by visually observing the minus line thermal paint. .

[0006]

【Example】

The present invention will be described in detail below with reference to the embodiments shown in FIGS. In each figure, the same parts as the conventional ones are indicated by the same reference numerals as those in FIGS. FIG. 1 is a vertical sectional front view of a commutator 1 of a rotary electric machine. The present invention is that the thermal paint 20 is applied to a portion of the surface on which a brush (not shown) does not slide, that is, a non-opposing portion of the brush. This is a feature of the configuration. In this case, as the heat-sensitive paint 20, as shown in FIG. 2 in the first embodiment, for example, the first heat-sensitive paint 20A that changes color at 50 ° C. and the second heat-sensitive paint 20B that changes color at 60 ° C., 80 ° C. The third heat-sensitive paint 20C, which changes its color due to the above, is formed by arranging a plurality of kinds of heat-sensitive paints each having a different color changing temperature in the circumferential direction so as to form a plurality of rows. . In the second embodiment, as shown in FIG. 3, with one kind of heat sensitive paint, for example, at 50 ° C., the color changes to red, at 60 ° C. to orange, and at 80 ° C. A fourth heat-sensitive paint 20D that changes its color to yellow is used to apply it to the corresponding part of the commutator.

In the above configuration, when the temperature of the surface of the commutator 1 rises due to the operation of the rotating electric machine, the thermal paint 20 changes color as follows and displays the temperature of the commutator at that time. That is, in the case of the first embodiment, as shown in FIG. 2, when the temperature of the surface of the commutator 1 reaches 50 ° C., the first heat-sensitive paint 20A discolors, and the temperature at that time is 50 ° C. Next, when the temperature of the commutator 1 rises to 60 ° C. or 80 ° C., the second heat sensitive paint 20B or the third heat sensitive paint 20C discolors, respectively. Therefore, the clerk can easily measure the temperature of the surface of the commutator 1 at each time by checking which row of the thermal paint 20 applied to the commutator of the rotating electric machine is discolored. Such a change in the temperature of the surface of the commutator 1 can be measured in the same manner as in the second embodiment shown in FIG. 3, but in this case, the fourth heat-sensitive paint 2C1 row is observed, The distinction is made according to the discolored state. For red, 50 ° C, for orange, 60 ° C, and for yellow, 80 ° C.

[0008]

[Effect of the device]

 Since the present invention has an extremely simple structure in which the thermal paint is applied to the portion of the commutator on which the brush is not slid as described above, it has the following excellent effects. Since the temperature of the commutator can be determined by the discolored state of the thermosensitive paint, a staff member can visually check the thermosensitive paint applied to the commutator surface of the rotating electric machine without stopping the rotating electric machine to be measured one by one as in the conventional case. By doing so, the temperature can be easily measured. Therefore, it is convenient to maintain the commutators of multiple rotating electrical machines.

In addition, as in the case of the first or second embodiment, if the heat-sensitive paints having different kinds of discoloring temperatures or the discoloring colors differing depending on the temperature are used, the temperature of the commutator may be changed. Since the target progress (change) can be known, necessary measures can be taken accurately before the dangerous temperature is reached.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of a main part of a commutator showing an embodiment of the present invention.

FIG. 2 shows a first embodiment of the present invention, and is a plan view showing a main part of a commutator in an expanded manner.

FIG. 3 shows a second embodiment of the present invention and is a plan view showing a main part of a commutator in an expanded manner.

FIG. 4 is a vertical sectional front view of a commutator main part showing a configuration of a conventional example.

FIG. 5 is a vertical cross-sectional front view of a commutator main part showing another conventional example.

[Description of Reference Signs] 1 : Commutator 20: Thermal paint 20A to 20C: First to third thermal paints having different discoloring temperatures 20D: Fourth thermal paint having different discoloring colors depending on temperature

Claims (3)

[Scope of utility model registration request] 1. A temperature measuring device for a commutator in a rotating electric machine, characterized in that a heat-sensitive paint is applied to a portion of a surface of a commutator of the rotating electric machine where a brush is not provided in opposition to a suitable width. 2. A plurality of types of heat-sensitive paints having different detected temperatures that are in a discolored state are used as the heat-sensitive paints, and these heat-sensitive paints are applied so as to form a plurality of rows in the circumferential direction on the surface of the commutator. A temperature measuring device for a commutator in a rotating electric machine according to claim 1. 3. The temperature measuring device for a commutator in a rotating electric machine according to claim 1, wherein the heat sensitive paint is one kind of heat sensitive paint having a color that changes color depending on a detected temperature.