KR101604615B1 - Generator collector ring polishing machine - Google Patents

Abstract

At least two or more points are supported so as to have a wide contact area with the surface of the collect ring while being rotated in a direction opposite to the direction of rotation of the collect ring to be polished so that polishing can be performed while being rotated in a direction opposite to that of the collect ring to be polished by the endless track system An abrasive part of an endless track system for abrading the abrasive; And a power generating unit including a mounting member mounted on the tool table while applying a rotational force to the polishing unit.
Accordingly, it is possible to maximize the contact area of the polishing region, maximize the polishing efficiency due to the reverse rotation, and remarkably shorten the working time due to the high polishing efficiency.

Description

[0001] GENERATOR COLLECTOR RING POLISHING MACHINE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a collector ring polishing apparatus for a generator, and more particularly, to a collector ring polishing apparatus for a generator that can be polished by being rotated in a direction opposite to that of a collect ring to be polished by an endless track system.

Generally, a generator is an apparatus that converts an energy of mechanical energy into electric energy using an electromagnetic induction action. The electric power is generated when a conductor rotates in a magnetic field.

These generators are made of a completely enclosed structure to prevent dust and moisture from entering and to prevent leakage of hydrogen gas. Hydrogen gas and water are used as cooling medium.

The ventilation inside the generator is performed by a closed circulation system by a fan attached to the rotor shaft, and a cooler for cooling the hydrogen gas is built in. In addition, the end shields on both ends of the stator are equipped with a rotor bearing and a shaft sealing facility.

The rotor is divided into a shaft, a winding, and a retaining ring. Here, the long bar of the rotor coil forms the basis for producing the flux that determines the output from the generator, and the cooled hydrogen gas to extract the heat generated when the magnetic flux is generated to the outside of the generator use.

On the other hand, a collector ring and a brush of a metal material, which are conductors for supplying DC power, are used for the rotor serving as a field.

The collect ring is inserted into the rotor in the form of a bushing and is surrounded by a rigging for arranging the brush magazines and the brush is mounted to the rigging through the brush magazine in a circular arrangement so that the collect ring is in contact with the surface of the collect ring .

Such brush type generators cause frictional damage to the surface of the collect ring due to the material of the brush during normal operation, and abnormal voltages such as lightning are generated in summer. At this time, an abnormal current flows between the contact surface of the brush and the collect ring, and a foot mark or the like is formed thereon, so that a severe flame is generated and the normal operation is sometimes impossible.

Accordingly, conventionally, the brush magazine attached to the rigging is separated while the output of the generator is rotated to speed up the collect ring surrounded by the rigging, and then the abrasive paper such as sand paper is polished by the manual operation of the operator .

In addition, in the state where the output and rotation of the generator are stopped, the collecting ring is rotated at a low speed while the collector is manually polished by the operator.

However, in the conventional method in which the surface of the collect ring is polished by the manual operation of the operator, there is a serious problem in the safety accident and the operation efficiency is remarkably lowered at the low speed operation.

In order to solve the above-described conventional problems, as disclosed in Korean Utility Model Registration No. 20-0182541 (hereinafter referred to as "prior patent document 1"), the gap between the brush magazine and the collect ring on the support arm of the brush magazine The support arm is provided with a brush brush or a brush model on which a polishing cloth is wound to selectively mount the brush model on the support arm so that the brush model can be easily mounted on the support arm and a uniform pressing force is applied to the collect ring. .

In addition, as disclosed in Korean Patent Laid-Open No. 10-2002-0001943 (hereinafter referred to as "Prior Art Document 2"), in order to easily remove the coating film generated on the surface of the collect ring without any manual work, A roll member provided to be driven in front of and behind the support shaft provided rotatably between one end of the frame member and a guide member disposed adjacent to the collect ring in the front and rear directions, And a collecting ring polishing apparatus composed of a supporting member to be installed and a polishing member for winding the surface of the collecting ring around the guide member by being wound around the roll member.

Korean Utility Model Registration No. 20-0182541 Korean Patent Publication No. 10-2002-0001943

However, the above-mentioned prior patent documents 1 and 2 have a disadvantage in that the structure of the polishing apparatus for polishing the surface of the collect ring has a considerably complicated structure, and the polishing efficiency is not so high as well as the high manufacturing cost due to many components .

That is, since the abrasive paper is kept only in a state of being in simple contact with the surface of the collect ring to be rotated, a high polishing efficiency can not be expected.

The main object of the present invention is to solve the above-mentioned problems of the related art. The main object of the present invention is to provide a collector ring polishing apparatus and a polishing method therefor, which can be polished by being rotated in a direction opposite to that of a collect ring to be polished by an endless track system .

Another object of the present invention is to minimize the slip phenomenon in the rotation of the abrasive belt.

Another object of the present invention is to make it easy to adjust the tension of the abrasive belt during polishing.

According to an aspect of the present invention, there is provided a polishing apparatus for polishing a surface of a collecting ring provided in a rotor of a generator, the polishing apparatus comprising: An abrasive part of an endless track type which abrades at least two points so as to have a wide contact area with the surface of the abrasive; And a power generating unit having a mounting member mounted on the tool base while applying a rotational force to the grinding unit, wherein the grinding unit includes a frame mounted on the power generating unit, A plurality of idle rolls for supporting at least two points on the surface of the collect ring at an end of the opposite side frame of the drive roll and a plurality of idle rolls wound around the periphery of the drive roll and the idle roll to polish the surface of the collect ring And a tension adjusting unit for tightening the abrasive belt against the surface of the collect ring, between the shaft of the idle roll and the frame, wherein the tension adjusting unit comprises: And an elastic member for supporting the front and rear ends of the idle roll on the long hole.

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The drive roll and the idle roll further include a soft synthetic resin coating layer for enhancing the adhesion strength with the abrasive belt.

The surface of the synthetic resin coating layer may further include a slip prevention part for preventing a slip phenomenon.

The slip prevention part is a scratch or fine irregular part formed on the surface of the synthetic resin coating layer.

The mounting member is detachably attached to the power generating portion.

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The elastic force of the elastic member positioned behind the idle roll is higher than the elastic force of the front elastic member of the axis.

The frame between the idle roll and the idle roll further includes an auxiliary support for bringing the abrasive belt into close contact with the surface of the collect ring.

The auxiliary support portion is detachably provided from the frame.

The auxiliary supporting portion includes an auxiliary frame detachably attachable to the frame, and a plurality of auxiliary rolls for elastically supporting the rear surface of the polishing belt at one end of the auxiliary frame.

The elastic supports of the plurality of auxiliary rolls are supported by elastic members of the axes of the auxiliary rolls.

A polishing apparatus for polishing a surface of a collecting ring provided in a rotor of a generator, the polishing apparatus comprising: a polishing apparatus for polishing a surface of a collecting ring to be polished so as to have a wide contact area with a surface of the collecting ring, An abrasive part of an endless track system for supporting at least two points and polishing the abrasive part; And a power generating unit having a mounting member mounted on the tool table while applying a rotational force to the polishing unit.

The polishing unit includes a frame mounted on the power generating unit, a driving roll connected to the frame and rotated by the power generating unit, at least an end of the frame opposite to the driving roll, A plurality of idle rolls for supporting at least two points, and an abrasive belt wound around the periphery of the drive roll and the idle roll and rotated to polish the surface of the collect ring.

The variable means includes a hinge portion at which an end of a frame on which the idle roll is mounted is divided, and a divided portion is rotatably formed at one side of the divided portion, and a support portion for elastically supporting the opposite side of the hinge portion.

CLAIMS 1. A method of polishing a surface of a collecting ring provided in a rotor of a generator, comprising the steps of: adhering an abrasive belt rotated in an endless track manner so as to contact a surface of the collecting ring in a large area; And polishing the abrasive belt adhering to the surface of the collect ring while rotating the abrasive belt in a direction opposite to the direction of rotation of the collect ring, wherein the abrasive belt has a variable contact area with the surface of the collect ring.

The abrasive belt is brought into close contact with the surface of the collect ring by supporting at least two points of the abrasive belt.

And the abrasive belt between the two or more points is brought into close contact with the surface of the collect ring by the elastic force supporting means.

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The variable of the abrasive belt is varied while the supporting means for supporting the abrasive belt are supported and supported so as to be opened and narrowed.

The present invention provides a simple structure that allows polishing to be performed while being rotated in a direction opposite to that of a collecting ring to be polished by an endless track system, thereby maximizing the contact area of the polishing region as much as possible, And the working time due to the high polishing efficiency can be remarkably shortened.

Further, since the slip phenomenon can be minimized during the rotation of the abrasive belt, the abrasion is more tightly performed, and the abrasion efficiency is further enhanced.

In addition, since the adjustment of the tension of the abrasive belt during polishing is facilitated, the polishing efficiency can be maximized by more precisely and closely polishing the abrasion region.

1 is a front view for explaining the present invention;
Fig. 2 is a plan view according to Fig. 1,
3 is a front view for explaining the use state of the present invention,
4 is a front view and a partial enlarged view for explaining another embodiment of the present invention,
5 is an exploded front view for explaining another embodiment of the present invention;
FIG. 6 is a front view of the engaged state of the used state according to FIG. 5;
7 is a front view for explaining another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The present invention is not limited to or limited by the embodiments.

Fig. 1 is a front view for explaining the present invention, Fig. 2 is a plan view according to Fig. 1, and Fig. 3 is a front view for explaining a use state of the present invention.

As shown in FIG. 1, an abnormal voltage is generated on the surface of the generator due to frictional damage or external factors, and an abnormal current flows between the contact surfaces of the brush ring and the collector ring. Disclosed is a polishing apparatus (1) for polishing a surface of a collect ring (C) for preventing a case in which normal operation due to impingement is impossible.

In the present invention, polishing is performed while being rotated in a direction opposite to that of a collecting ring to be polished by an endless track method, so that high polishing efficiency can be obtained.

The polishing apparatus 1 according to the present invention is provided with at least two or more points so as to have a wide contact area with the surface of the collect ring C while being rotated opposite to the rotating direction of the collect ring C to be polished in order to maximize polishing efficiency An abrasive part 10 of an endless track system for supporting and polishing; And a power generating unit 20 including a motor and a motor housing having a mounting member 21 mounted on a conventional tool rest 100 while providing a rotating force to the polishing unit 10. [

In other words, since the polishing unit can be polished while being rotated in a direction opposite to the rotation direction of the collect ring while having a wide contact area, it is possible to achieve high polishing efficiency . That is, as the coefficient of friction between the surface of the collect ring and the wide contact area is increased due to the reverse rotation of the polishing unit, the polishing efficiency is enhanced. It also has additional conditions that can reduce polishing time due to high polishing efficiency.

The grinding unit 10 includes a frame 12 mounted to a motor housing or the like of the power generating unit 20 by a conventional bracket or screw or the like and a driving roller 20 connected to the power generating unit 20, A plurality of idle rolls 16 for supporting at least two points on the surface of the collect ring C at the end of the opposite side frame 12 of the drive roll 14, And an abrasive belt 18 wrapped around the outer peripheral surface of the idle roll 16 and rotated to abrade the surface of the collect ring C. [

In the above, the abrasive belt uses a conventional sand paper in the form of a circular ring. The sandpaper is classified into a material and a roughness. The material is usually classified into paper, cloth, sponge, film, rubber, diamond and the like. Here, a number of products are produced depending on the mixing ratio of the abrasives. The roughness is represented by a number. The lower the number, the rougher the roughness.

The driving rolls and the idle rolls of the polishing unit are preferably substantially triangular with respect to the driving roll, and may be formed in various forms as needed or in addition to the triangles.

Whereby the abrasive belt between the idle rolls of the abrasive belt surrounding the drive roll and the plurality of idle rolls actually polishes the surface of the collect ring.

The drive roll 14 and the idle roll 16 further include soft synthetic resin coating layers 14A and 16A for increasing the adhesion strength with the abrasive belt 18. [ That is, as the back surface of the abrasive belt 18 abuts against the surfaces of the driving roll 14 and the idle roll 16, a coating layer 14A (16A) such as rubber or silicone is formed on the surface thereof The abrasive belt 18 is closely contacted with the abrasive belt 18 so that the abrasive belt 18 can be smoothly rotated by the driving roll 14 and the idle roll 16. [

The surface of the synthetic resin coating layer 14A 16A may further include a slip prevention part (not shown) for preventing a slip phenomenon with the abrasive belt 18, It is preferably formed in the form of scratches or fine unevenness having fine gaps formed in the substrate. In other words, even when the back surface of the abrasive belt and the coating layer are in close contact with each other, the slip prevention part prevents the abrasive belt from slipping from the surface of the driving roll and the idle roll due to high friction coefficient due to reverse rotation with the collect roll, It plays a role of fixing. Thereby providing a condition for further increasing the polishing efficiency.

Meanwhile, the mounting member 21 is detachably attached to the power generating unit 20 by a conventional screw, bolt, bracket, or the like so that the mounting member 21 can be replaced according to a conventional tool to be mounted. Therefore, a mounting member can be selectively adopted according to a tool stand provided on the field so that high compatibility can be obtained.

4 is a front view and a partial enlarged view for explaining another embodiment of the present invention.

As shown, in the above-described configuration, the abrasive belt in close contact with the collecting ring has a closer adhesion force so that it can have higher polishing efficiency.

Between the shaft of the idle roll 16 and the frame 12, a tension adjuster 30 for tightly contacting the abrasive belt 18 with the surface of the collect ring is further included.

The tension adjusting unit 30 includes an elongated hole 32 formed in a frame 12 to which an idle roll 16 is coupled and an elongated hole 32 extending in the longitudinal direction of the idle roll 16, And an elastic member 34 such as a spring. At this time, the elastic force of the elastic member 34 positioned behind the idle roll 16 is formed to be higher than the elastic force of the front elastic member 34 of the shaft so that the idle roll 16 can be elastically supported by the collect ring .

Accordingly, the idle roll can be made to have fluidity as much as the length of its slot by the elastic member on the long hole, so that the tension of the abrasive belt, which is wrapped by the idle roll and the driving roll, It is a condition that can be.

Therefore, the degree of close contact with the polishing roller can be adjusted according to the strength of pressing the polishing apparatus of the present invention when polishing the surface of the collect roll.

FIG. 5 is an exploded front view for explaining another embodiment of the present invention, and FIG. 6 is a front view of the combined state of use according to FIG.

The frame 12 between the idle roll 16 and the idle roll 16 is provided with an auxiliary for pressing the back surface of the abrasive belt 18 more closely to the surface of the collect ring, And further includes a support portion (40). At this time, the auxiliary supporting portion 40 is detachably attached to the frame 12 by a conventional screw or bolting.

The auxiliary support unit 40 includes an auxiliary frame 42 detachably attached to the frame 12 and a plurality of auxiliary rolls 44 for elastically supporting the rear surface of the abrasive belt 18 at one end of the auxiliary frame 42 do. At this time, the elastic supports of the plurality of auxiliary rolls (44) are supported by elastic members such as ordinary springs and the like. The elastic support may have the same structure as that of the above-described tension adjuster, and may have a structure of known buffer means if necessary.

As a result, the abrasive belt between the idle rolls is once again pressed by the auxiliary supporting portion and brought into close contact with the surface of the collecting ring, thereby bringing the abrasive belt into close contact with the surface of the collecting ring by the idle roll and the auxiliary roll more closely And has a condition capable of maximizing polishing efficiency.

7 is a front view for explaining another embodiment of the present invention.

As shown in the drawings, the polishing unit of the polishing apparatus and the power generating unit have the same technical constitution, and detailed description will be omitted.

In this section, variable means for pressing the abrasive belt 18 such that a plurality of idle rolls 16 are variable in the abrasive section and the abrasive belt 18 is brought into contact with the surface of the collect ring at a wide contact area.

And a variable means 50 for bringing the abrasive belt 18 into close contact with the surface of the collect ring at the end side of the frame 12 on which the idle roll 16 is mounted.

The variable means 50 includes a hinge portion 52 in which the end of the frame 12 on which the idle roll 16 is mounted is divided and a divided portion is rotatably formed at one side of the divided portion, And a support portion 54 that elastically supports the opposite side of the support portion 54 with a conventional spring or the like.

In other words, the variable means moves the abrasive belt between the idle rolls to the surface of the collecting ring as the divided ends of the frame are opened from the hinges as the idle roll is held in contact with the surface of the collect ring, And can be closely adhered to each other. And thus has a condition capable of maximizing the polishing efficiency.

In addition, the support part supports the frame so that the end of the frame does not deviate from a certain range in the course of widening, and also restores the state of the frame before the end of the frame is opened after the grinding operation is completed.

This makes it possible to adjust the tension of the abrasive belt not to have a complicated structure but to allow the end of the frame equipped with the simple structure idle roll to be widened by the variable means so that the tension can be adjusted, So that the polishing efficiency can be maximized.

Meanwhile, in the polishing method according to the present invention, an abrasive belt rotated in an endless track manner is brought into close contact with a normal driving source and a plurality of rollers or the like so as to contact with a large area on the surface of a collect ring to be polished.

Then, the polishing belt closely attached to the surface of the collect ring is polished so as to have high polishing efficiency while rotating in the direction opposite to the rotating direction of the collect ring.

So that it can be highly polished by an abrasive belt rotated in an endless track manner and rotated in a direction opposite to a collecting ring which is a workpiece with a wide contact area.

The abrasive belt is held in contact with the surface of the collect ring by supporting at least two points of the abrasive belt, and the abrasive belt between the two or more points is further brought into close contact with the surface of the collect ring by the elastic force supporting means.

Thereby maximizing the polishing efficiency by ensuring the polishing area of the collect ring to be as wide as possible, and by bringing the polishing belt into close contact with the surface of the collect ring by the elastic force supporting means, the polishing efficiency can be further increased.

In addition, the abrasive belt is variable so that the contact area of the abrasive belt with the surface of the collect ring is variable, while the variable of the abrasive belt is varied while being supported so that the supporting means for supporting the abrasive belt can be opened and narrowed.

In other words, one side of the supporting means is rotatably provided by a normal hinge or the like, and the opposite side is contracted and expanded by a spring, a cylinder or the like so that the contact area of the abrasive belt closely contacted to the surface of the collecting ring is varied , The polishing efficiency can be further increased, and the contact area can be ensured as wide as possible according to the size of the collect ring.

Thus, the polishing method of the present invention does not increase the polishing efficiency through a complicated process but has a condition capable of maximizing the polishing efficiency by a simple processing process.

1: Polishing apparatus
10: Abrasive part 12: Frame
14: driving rolls 14A, 16A: coating layer
16: idler roll 18: abrasive belt
20: power generating unit 21: mounting member
30: tension adjusting part 32: long hole
34: elastic member 40: auxiliary support
42: Auxiliary frame 44: Auxiliary roll
50: variable means 52:
54: Support

Claims (21)

A polishing apparatus for polishing a surface of a collect ring provided in a rotor of a generator,
Wherein the polishing apparatus includes: a polishing unit of an endless track system that supports at least two points so as to have a wide contact area with a surface of the collect ring while being rotated opposite to a rotation direction of the collect ring to be polished; And
And a power generating unit having a mounting member mounted on the tool base while applying a rotational force to the polishing unit,
The polishing unit may include a frame mounted on the power generating unit, a driving roll connected to the frame and rotated by the power generating unit, and a plurality of supporting members for supporting at least two points on the surface of the collecting ring, An idle roll, and an abrasive belt wound around an outer circumferential surface of the drive roll and the idle roll and rotated to polish a surface of the collect ring,
And a tension adjusting unit for bringing the abrasive belt into close contact with the surface of the collect ring, between the shaft of the idle roll and the frame, wherein the tension adjusting unit has a long hole formed in a frame coupled with the idle roll shaft, And an elastic member for supporting the front and rear ends,
Wherein the elastic force of the elastic member located behind the idle roll is higher than the elastic force of the front elastic member of the shaft. delete The method according to claim 1,
Wherein the drive roll and the idle roll further comprise a soft synthetic resin coating layer for increasing the adhesion strength with the abrasive belt. The method of claim 3,
Wherein the synthetic resin coating layer further comprises a slip prevention part for preventing a slip phenomenon on the surface of the synthetic resin coating layer. 5. The method of claim 4,
Wherein the slip prevention portion is a scratch or fine concave portion formed on a surface of the synthetic resin coating layer. The method according to claim 1,
Wherein the mounting member is detachably attached to the power generating portion so as to be replaceable. delete delete delete The method according to claim 1,
Wherein the frame between the idle roll and the idle roll further includes an auxiliary support for bringing the abrasive belt into close contact with the surface of the collect ring. 11. The method of claim 10,
Wherein the auxiliary support portion is detachably attached to the frame. 12. The method of claim 11,
Wherein the auxiliary support portion includes an auxiliary frame detachably attachable to the frame, and a plurality of auxiliary rolls for elastically supporting the rear surface of the polishing belt at one end of the auxiliary frame. A polishing apparatus for polishing a surface of a collect ring provided in a rotor of a generator,
Wherein the polishing apparatus includes: a polishing unit of an endless track system that supports at least two points so as to have a wide contact area with a surface of the collect ring while being rotated opposite to a rotation direction of the collect ring to be polished; And
And a power generating unit having a mounting member mounted on the tool base while applying a rotational force to the polishing unit,
The polishing unit may include a frame mounted on the power generating unit, a driving roll connected to the frame and rotated by the power generating unit, and a plurality of supporting members for supporting at least two points on the surface of the collecting ring, An idle roll, and an abrasive belt wound around an outer circumferential surface of the drive roll and the idle roll and rotated to polish a surface of the collect ring,
And a tension adjusting unit for bringing the abrasive belt into close contact with the surface of the collect ring, between the shaft of the idle roll and the frame, wherein the tension adjusting unit has a long hole formed in a frame coupled with the idle roll shaft, And an elastic member for supporting the front and rear ends,
The frame between the idle roll and the idle roll further includes an auxiliary support for bringing the abrasive belt into close contact with the surface of the collect ring,
Wherein the auxiliary support portion includes an auxiliary frame detachably attachable to and detachable from the frame, and a plurality of auxiliary rolls for elastically supporting the back surface of the polishing belt at one end of the auxiliary frame,
Characterized in that elastic supports of the plurality of auxiliary rolls are supported by elastic members on the axes of the auxiliary rolls.
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