KR830002149Y1 - Rotary Electric Brush Support - Google Patents

Abstract

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Description

Rotary Electric Brush Support

1 is a perspective view showing a brush support device of the present invention.

2 is a side view thereof.

Figure 3 is a side view showing a brush detachment device of the present invention.

4 is a perspective view showing a lever operating mechanism.

5 is a perspective view of the surroundings of the brush support mechanism.

Figure 6 is a side view showing a brush support mechanism of the present invention.

7 and 8 are longitudinal cross-sectional views showing the periphery of the brush lock device.

The present invention relates to an improvement of a brush support device of a rotary machine, and more particularly, to an improvement of a brush support device configured to be able to exchange a brush during operation of a rotary electric machine.

In general, for example, a rotary electric machine such as a turbine generator or a water turbine generator supplies electric power for exciting from a stator side to a rotating rotor winding.

In this case, since one side is rotating, it is impossible to mechanically supply electric power by combining energized wires. Therefore, in general, a slip ring formed of a conductor is installed on the rotating side, that is, a part of the rotor, while a soft brush, for example, a carbon brush or a metallic brush is disposed on the stator side, so that the sliding contact between the two is made. I) electrical coupling is to be performed.

In this case, a brush support is generally used as a means for fixing and holding this brush on the stator side. The brush supporter not only prevents the brush from falling, but also prevents the brush from crossing in the lateral direction, while pressing the brush such as a slip ring such that the brush contacts with a predetermined pressure sufficient for the slip ring described above. Equipped with means. In addition, the brush support must be fixed to the stator side sufficiently to prevent the vibration from occurring even against vibration of the rotary electric machine or collision of cooling gas flowing around the brush support at high speed. In this regard, the brush support is generally formed to be firmly fixed by being bolted to the fixed part or integrally formed with the fixed part.

Since the brush support is constructed and fixedly supported, when the brush housed therein is damaged due to abrasion or cracks, the brush support is only fixed out of the brush support while the brush support is fixed. In this case, the brush and the brush support itself are energized parts, so that the operation of the rotary electric machine is stopped in consideration of the safety of the worker. That is, even if the rotary electric machine is energized, it causes a bad state, so the rotary electric motor should not be stopped.

Due to such a demand, a device of this kind has been devised and practically used in recent years so that brush exchange can be performed without stopping the rotary electric machine.

Taking out (or attaching) the brush only as a means of exchanging the brush without stopping the rotary electric machine is performed by a pressing device (usually springy) forcing the brush toward the slip ring side, that is, the brush head. It is difficult because it is arrange | positioned at the side which is going to take out. Therefore, in general, most of them are taken out with the brush supporter which supports the brush.

Taking out together with the brush supporter has an insulating handle on the head of the brush supporter in advance, so that the operator's hand is not close to the energizing part in comparison with the case where the brush is taken out. There is an advantage. However, on the other hand, there is a defect that is not completely fixed because the brush support is configured detachably.

That is, as described above, if the brush support itself vibrates, it causes vibration even to the brush stored therein, resulting in a chattering phenomenon, that is, a decrease in current carrying capacity, and thus the adjustment side of the brush support itself. To be very firmly supported. However, the solid fixed support can be easily supported by the fixing of bolts or integral parts, etc., but in order to be detachably and securely supported in this way, a very difficult problem occurs.

In this way, replacing the brush while energizing is required to solve a number of difficult problems, but the following are known to be practically used with such conditions. That is, as described in Japanese Patent Application Laid-Open No. 50-114514, the brush support body is fixed to the spring ring on the stator side, and the member supporting the spring with the spring pressing the brush. A locking member or insulating handle is installed to remove or mount them together with the brush. The brush support can then be manufactured integrally with, for example, bolting on the stator side or with a bushing on the stator side, and a rigid stationary support is possible.

However, when the brush is replaced, especially when the brush is mounted on the rotary electric machine together with the spring, since the spring itself presses the brush, it is difficult to support the brush during transportation and the brush replacement work is not easy.

The present invention was made in view of this point, and its object is that the brush support itself is fixed to the stator side and the brush support is made to detach the brush with the spring, even if the brush is transported while the brush is carrying the member ( The present invention provides a brush support device of this kind that is well supported in the back and is easily detachable from the brush. That is, the present invention is to achieve the desired purpose by configuring the brush support as a brush support mechanism and a brush detachable device configured as follows.

Brush support mechanism

It is fixed to the fixed side of a rotary electric machine and provided with the following things.

Brush Box: Holds a brush.

Periodic column: Established in part of the brush box.

Hanging part: It is installed on a part of main pillar to hang with a part when a brush detachable device is installed.

Brush detacher

Removable with the brush in the brush support mechanism is formed as follows.

Main wall

Brush press spring: One end is fixed to the main wall, and the other end presses the brush.

Insulation handle: It is attached to the head of the main wall and installed to carry the brush detachable device.

Fixed locking part: It is hooked with the locking part of the brush support mechanism.

Control lever: It explains in detail how to attach and detach the fixed locking bracket.

Brush lock device: It is installed on the lower part of the main wall to hold and support the brush when transporting.

Brush support: It is fixed to a part of the main wall and arranged to surround the brush.

Hereinafter, the present invention will be described in detail based on the illustrated embodiment.

1 and 2 show a current collector having a slip ring 1 which is integrally rotated with a rotating shaft, and a brush support 2 and a boot ring 3 fixedly disposed around the slip ring. Is shown. The slip ring 1 is formed as a conductor and is electrically coupled to the rotor wire via a lead wire disposed in the hollow hole of the rotating shaft although not shown in the drawing.

The brush supporter 2 on the fault side is electrically coupled to the exciter via the bushing 3. The brush support 2 acts as an electrical coupling between the rotor winding and the excitation in this way, and in particular, the action between the rotating slip ring 1 and the fixed stator, ie the boot ring 3. Doing

The brush support 2 is roughly divided into a thrust support mechanism 4 and a brush detachment apparatus 5. The brush support mechanism 4 is always fixed as a bolt 6 on the stator side, that is, the boot ring 3, and the brush detachment apparatus 5 is detached from the brush support mechanism 4, i.e. It is formed so that it can be removed. The brush detachment apparatus 5 and the brush support mechanism 4 of this extracted state are shown by the simple components in FIG. 3 and FIG. 4, respectively.

Based on these drawings, first, the brush detaching apparatus 5 is demonstrated. In FIG. 3, the brush detaching apparatus 5 includes a brush 8 having a spring circumferential wall 7 and a pigtail 8a and a brush support for storing and supporting the brush. (9) and the handle 10 for carrying or detaching the brush detachment device itself, the U-shaped locking latch 11 for fixing or detaching from the brush support mechanism, and the brush 8 in the brush detachment device. A coil spring 14 for pressing the brush lock device 13 for lifting and holding the brush 8 and the brush 8 at a predetermined pressure (typically around 150 g / cm ² ) is provided on the slip ring side. The coil spring 14 is wound on the outer side of the coil spring 14 at the lower portion of the spring circumferential wall 7 and the other end forms a free end. This free end side is placed on the front of the brush in the state where the brush 8 is stored.

In addition, a screw hole is provided in the upper portion of the spring circumferential wall 7, and the screw rail 8a terminal of the brush is fixed to the screw hole by the screw 15, while the energizing knife 16 is in the back portion of the spring circumferential wall. It protrudes in the direction and is installed. The energizing knife 16 is formed as a conductor to be electrically coupled to the pigrail, and has a narrow protrusion 16a at its tip. The above-mentioned handle 10 is provided in the head circumference wall. That is, the handle 10 extends upward from the head of the spring circumferential wall 7 and is firmly fixed to the spring circumferential wall 7. In addition, the handle 10 is provided with a protective insulating plate 17 between the spring circumferential wall 7 to protect the worker from electric shock or electric shock. It goes without saying that the handle 10 itself is also formed as an insulator.

As shown in FIG. 4, the upper surface of the protective insulating plate 17 is provided with an opening 17a of a rectangular shape, and the operating lever 11a of the U-shaped locking latch 11 is electrically protected. To protrude. Moreover, on the same surface, the lock mark 17b for confirming the fixed state to the brush support mechanism 4 of the brush detachment apparatus 5 mentioned later, and the operation direction arrow 17c of the operation lever 11a at the time of detachment are shown. ) Is installed.

If the protective insulating plate 17 is formed of both an insulator and a transparent body, it is effective because the wear state and the operating state of the brush 8 can be easily checked from the outside. However, not only the whole must be an insulator, for example, even if an insulating coating is applied to the surface of a metal plate, there is no problem.

The same applies to the handle 10. Insulating protective plate 17 is preferably made as large as possible to protect the operator electrical or mechanical, but the size and shape is selected in consideration of the ease of operation. Especially in this case, although it is formed in a square shape, if it is such a shape, the space between adjacent brush support mechanisms is sufficiently covered by this insulation protection plate when it mounts in an electrical phase, and it is very advantageous to prevent an electric shock.

The brush support 9 is installed in a shape wound around a central portion of the spring circumferential wall 7 so as to have a size that allows the brush 8 to be easily inserted. Although this brush support may be a cylindrical tube, as shown in FIG. 5, the V-shaped cutout which is wide (brush head side) of the upper side to the side 9a which opposes the spring circumference wall 7 is shown. When the 9b is provided and the brush 8 wears and becomes short, the pigtail 8a can pass through this portion without being caught by the brush support. And when the bottom width of the cut-out portion (9b), such as W ₁ <W ₂ in the width (W ₂₎ of the dimension (W ₁₎ and a coil spring 14 the narrow portion, the brush holder of the coil spring 14 ( 9) Since the coil spring 14 has no fear of jumping out of the support, even when the brush 8 near the edge is cut, the brush is easily attached to the brush detaching device 5.

The U-shaped fixed locking tool 11 is formed as a spring elastic material, one end of which is the pin 18 above the back of the spring circumferential wall 7, that is, the side opposite to the side where the brush is in close contact with the pin support 18. ) Is fixed.

The other end of the U-shaped locking latch 11 is an operating lever 11a protruding from the opening 17a of the insulating protective plate 17. Two projections 11b and 11c are provided in the center of the same plane as this place.

The projection 11b provided on the upper side (slip ring side) is a tapered surface in which the distance from the circumferential wall 7 becomes wider as it goes to the anti-slip ring side (upper side in the figure). The projections 11c on the upper side (half slip ring side) are provided at regular intervals in relation to the insertion into the brush support mechanism 4 described later in the direction opposite to the projections 11b. The fixed latch 11 is elastically fitted into the guide groove (21C of FIG. 6 described later) of the brush support mechanism 4, and the projection 11b is caught by the opening (FIG. 21A) so that the brush detaching device ( 5) to mechanically support the brush support mechanism (4).

The brush lock apparatus 13 is arrange | positioned under the spring circumference wall 7 (slip ring side). This brush lock device has a rocking plate 13a fixed at one end with a rivet 18a, and supports the bottom of the brush 8 at its lower end. In other words, the swinging plate 13a is disposed below the spring circumferential wall 7 along the spring circumferential wall, and its lower end is formed of a swinging material by the spring action. Dare the tip is bent in the L-shape on the brush box 20 side of the brush support mechanism, and this bent tip and its vicinity are formed to be inserted into a cutout 20a provided at the bottom of the brush support mechanism (first). See also 6). Moreover, the rocking plate is provided with a locking portion 13b having a tapered surface which protrudes in the opposite direction to the direction bent in the L shape and toward the slip ring side, and the gap with the spring circumferential wall 7 increases. For the purpose of explanation, this brush lock device is made of a rocking material by a spring action, but in this case, the tip of the rocking plate 13a is not always operated freely, but always the brush box 20 side. This is because it is installed to have a moving force.

The sleeper 19 of each shape attached to the lower end of the spring circumferential wall 7 and the coil spring 14 side by the pin 18b corresponds to the pressing direction below the coil spring 14. While the brush 8 is placed on the brush lock device 13 at the position, the brush 8 is stably held by holding the brush with the sleeper 19 and the brush support 9 so that the brush 8 is detachably attached. ) Is to support.

The brush detachment apparatus 5 is comprised as mentioned above, and can carry it freely in the state which supported the brush 8 by holding and operating the pins 10. As shown in FIG. Operation and operation will be described later.

Next, the brush support mechanism 4 to which this brush detachment apparatus 5 is fixed-supported based on FIG. 6 is demonstrated.

The brush support mechanism 4 is comprised as follows schematically. That is, it is comprised as the brush box 20 fixed to the boot | ring 3 with the bolt 6, and the electricity supply socket 22 provided in the main pillar 21 established from a part of this box, and the top of this main pillar. It is. The brush box 20 is formed in an angular shape of a size such that the brush 8 can move freely in the longitudinal direction (in the direction of the R arrow in the drawing) and cannot move in the transverse direction. . One side of the brush box 20, that is, the side in which the main column 21 is formed, is provided with a longitudinal cutout 20a.

In addition, the main column 21 is provided with a substantially rectangular opening 21a for receiving the projection 11b of the fixed locking bracket 11 of the brush detachable device, while the surface 21b is opposed to the surface having the same. Guide grooves 21C are formed to guide the circumferential wall 7 and the U-shaped fixing locking brackets 11 mounted on the rear wall thereof. In addition, a tapered portion 21d inclined toward the anti-brush box side is installed at the lower end of the brush support mechanism 4, and its operation will be described later, but the brush detachment device 5 is fixed to the brush support mechanism 4. At this time, the tapered portion 21d operates to operate the brush lock device 13 described above.

The projection 11b is fixed to the support mechanism 4 by the longitudinal movement of the spring circumferential wall 7 and the U-shaped locking fastener 11 communicating with it, in relation to the opening 21a described above. Although locked, the operation for fixing is performed in accordance with the downward movement of the handle 10.

Next, the case of attaching and detaching the brush detaching apparatus 5 to the brush support mechanism 4 comprised as mentioned above is demonstrated.

In the case of mounting, first, the brush 8 is inserted into the brush support 9 of the brush detaching apparatus 5. Insertion of the brush 8 releases the brush lock device 13 in advance, i.e., opens the tip of the rocking plate 13a in a direction away from the brush support 9, and the brush ( 8) is inserted in the pressing direction of the coil spring 14 from below. In addition, the brush lock device 13 may be released by a worker's finger. However, if a stick or the like is prepared in advance, the stick may be interposed between the spring circumferential wall 7 and the swing plate 13a. It is desirable for work efficiency and safety.

Subsequently, when the brush lock device 13 is released while the brush 8 is sufficiently inserted, the tip of the swing plate 13a is caught by the bottom of the brush 8 to prevent the brush 8 from being separated. In this case, since the brush adjusts the position of the sleeper 19 in advance so as to coincide with the pressing direction of the coil spring 14, as described above, the correct posture (generally perpendicular to the slip ring) on the swing plate 13 is used. It is pressed by the low spring 14.

Next, the terminal of the pig rail 8a provided in the brush is fixed to a part of the spring circumferential wall 7 by the screw 15. This leads to the state of FIG. In this state, the operator grasps the handle 10 of the brush detachable device 5 and transports it to a predetermined position, that is, the current collector, and mounts it to the brush support mechanism 4 of FIG.

The attachment and detachment of the brush detachment apparatus 5 is guided by the guide groove 21c provided in the main column 21 of the brush support mechanism 4, and the brush detachment apparatus can be easily inserted into this portion.

By inserting the brush attachment and detachment device 5 into the brush support mechanism 4, the U-shaped fixed locking bracket 11 is narrowed upward (operating lever 11a side) by a spring action in the guide groove 21c. When it is bent but well inserted, that is, when the projection 11b of the fixed locking bracket 11 and the opening 21a of the brush support mechanism 4 are engaged, the fixed locking bracket 11 returns to its original shape. Therefore, the projection 11b and the opening 21a are caught by this, and the brush detaching apparatus 5 is not pulled upward.

This lock state can be judged sufficiently by the touch holding the handle 10 when it is formed to strengthen the spring action of the fixed locking bracket 11, but as shown in FIG. 4, the lock provided on the upper surface of the insulating protective plate 17 is shown. This can be confirmed as a relation between the display 17b and the operation lever 11a. That is, in the case of the display of FIG. 4, since the position of the operation lever is missing in the lock indication 17b, it shows that the brush attachment / detachment device is fully locked. If the insertion is insufficient, the operation lever 11a is positioned within the range of the lock display 17b because the width of the upper portion of the U-shaped locking latch is narrow as described above.

In addition, the upper projection 11c of the fixed locking bracket 11 is installed so as to be caught by the tapered portion 21d of the main column 21 when the brush detachment device 5 is inserted into the brush support mechanism 4 too much by mistake. will be.

The above has described the operation of fixing the brush detachable device 5 to the brush support mechanism 4 and the operation thereof. In addition, the brush lock device 13 described above and the operation diagram for energization by the insertion of the brush detachable device are described above. It is possible. That is, when the spring circumferential wall 7 of the brush detachable device is inserted as shown in FIG. 7 according to the guide groove 21c of the brush support mechanism, the engaging portion 13b of the swing plate 13a and the lower end of the brush support mechanism The top portion 21e provided in the upper portion starts to contact, and immediately the tapered portion presses the rocking plate 13a on the opposite side of the brush box so that the rocking plate 13a moves. Therefore, the tip of the L-shape, which is the opposite side of the rocking plate, is separated from the bottom of the brush to release the lock of the brush 8 as shown in FIG. At this time, the energizing knife 16 and the energizing socket 22 are brought into engagement with each other. Thus, the brush detachment apparatus 5 is mounted on the brush support mechanism 4, while the electrical coupling from the slip ring 1 to the stator side is also possible. That is, the state of FIG. 1 and FIG. 2 is that state. Next, the case where the brush detachment apparatus 5 is detached from the brush support mechanism 4 is demonstrated.

The detachment of the brush detachment apparatus 5 is performed when the brush 8 is worn or damaged, or when the brush 8 or the brush support mechanism and the detachment apparatus itself are inspected.

First, the operator grasps the handle 10 and the operation lever 11a of the brush detaching apparatus, and moves the operation lever 11a in the direction of the arrow 17c (the handle 10 side) shown in FIG. That is, when the operation lever 11a pulls up a brush detachment apparatus upward while maintaining the state which deviated from the lock indication 17b, the brush detachment apparatus will be released and can be detached from a brush support mechanism. On the other hand, after this operation, i.e. after moving the brush detachable device (in the middle of pulling out), the tapered portion 21d and the locking portion 13b of the swinging plate 13a are separated to be released by the pressure of one end of the swinging plate 13a, The lower wall part of the brush 8 is pushed to one side by the other tip part. In this pressing operation and the one wall surface of the brush support 9 (the wall surface facing the circumferential wall 7), the brush 8 is frictionally pressed. The worn out brush shortens the above action, but it is coupled to the pigrail, so when the handle is lifted, the brush support mechanism with the brush is released.

The present invention can smoothly and easily replace the brushes arranged around the brush even when the coil spring presses the brush while carrying the brush detachable device as described above.

Claims (1)

Brush 8, which is arranged in sliding contact on the main surface of slip ring 1, and brush support 2, which supports the brush while pressing the main surface of slip ring at a predetermined pressure, etc. In the brush support device of the rotary electric machine provided so that the brush can be detached or mounted during the operation of the rotary electric machine, the brush support mechanism 4 fixed to the fixed side of the rotary electric machine is a brush containing the brush 8 Brush attachment and detachment which consists of a box 20, the main pillar 21 established from a part of a brush box, the latching part 13b provided in a part of a main pillar, etc. and which can be attached or detached with a brush from the said brush support mechanism. When the device 5 is equipped with a spring circumferential wall 7, a brush pressing coil spring 14 for pressing the brush, an insulating handle 10 for carrying the brush detaching device, and a brush detaching device attached to the brush support mechanism 4, The catch of the brush support mechanism A fixed locking portion to be caught, a means for locking and disengaging the locking portion and the locking portion, a brush lock support means for supporting the bottom of the brush when carrying the brush detachment device, and a spring circumferential wall 7 Rotary brush support device, characterized in that consisting of a brush support (9) and the like arranged to surround the back of the brush.