A grinding tool for collector ring of a hydro-turbine generator set

Abstract

The present invention relates to the technical field of motor maintenance tools, and specifically to a collector ring grinding tool for a hydro-turbine generator set. The tool comprises a channel steel ring, a grinding block and a flat steel bar, wherein a first through slot is provided in the channel steel ring, wherein the first through slot is used to fix the grinding block, wherein the flat steel bar is fixedly connected to the channel steel ring, wherein a limiting mechanism is provided on the flat steel bar, wherein the limiting mechanism is used to limit the grinding block in the axial direction of the first through slot, wherein a fixing plate is provided on the side of the channel steel ring, wherein a first mounting groove is provided on the fixing plate. The present invention can be applied to a narrow working environment near the collector ring of a hydro-turbine generator set, and can be used to replace the traditional collector ring grinding process, thereby shortening the grinding process cycle and improving work efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of motor repair tools, and in particular to a collector ring grinding tool for a hydro-generator set. Background Art

[0002] The brush holder of the brush motor is equipped with many brush holders, each of which is equipped with a brush holder spring and a carbon brush. The carbon brush and the collector ring or commutator maintain good contact during high-speed rotation. The brush holder is a mechanical guide groove inside the brush motor that holds and maintains the position of the carbon brush. The function of the brush holder is to apply pressure to the brush that is in sliding contact with the commutator or collector ring surface through a spring, so that it can stably conduct current between the fixed body and the rotating body.

[0003] Collector rings, also called conductive rings, are widely used in motor rotors. Due to the long-term high-speed relative sliding between the collector rings and the brushes, there will be step wear on the collector rings equivalent to the width of the brushes. Once wear occurs, the worn parts on the collector rings will cause poor current collection and produce sparks. The wear will gradually worsen and expand, and finally form scars of the same size as the sliding contact surface of the brush, resulting in serious electrical corrosion of the collector rings, high collector ring temperatures, and reduced insulation performance, which will cause rapid wear of the carbon brushes, seriously affecting the safe operation of the unit.

[0004] In the bulb head of the existing large-scale tubular turbine generator set, due to the poor air flow and heavy humidity, the collector rings are easily damp and rusted, and other reasons cause the slip ring surface to be uneven and sparks. The collector rings need to be ground and repaired, but in the actual grinding and repair process, they are often faced with major problems such as narrow side space of the collector rings of large-scale tubular units, few operators, and time-consuming on-site removal and installation of collector ring covers. The current treatment method is to remove the collector rings and send them to a special place for grinding. The repair cycle is long, the cost is high, and the work efficiency is reduced. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a collector ring grinding tool for a hydro-turbine generator set. When used, the tool is suitable for the narrow working environment near the collector ring of the hydro-turbine generator set, can shorten the collector ring grinding process cycle, and facilitate the efficient completion of the collector ring grinding.

[0006] The technical solution adopted by the present invention is:

[0007] A collector ring grinding tool for a hydro-turbine generator set comprises a channel steel ring, a grinding block and a flat steel bar, wherein a first through groove is provided in the channel steel ring, the first through groove is used for fixing the grinding block, the flat steel bar is fixedly connected to the channel steel ring, a limiting mechanism is provided on the flat steel bar, the limiting mechanism is used for limiting the grinding block in the axial direction of the first through groove, a fixing plate is provided on the side of the channel steel ring, and a first mounting groove is provided on the fixing plate.

[0008] When it is used, for the collector ring that needs to be ground, a carbon brush holder can be removed from its brush holder frame, and then the grinding tool is installed at the original position of the carbon brush holder on the collector ring brush holder frame through the first installation groove on the fixed plate, and the grinding block is fixedly placed in the first through groove, and the limiting mechanism is installed through the flat steel bar. The grinding block is limited by the limiting mechanism so that the grinding block contacts the collector ring that needs to be ground, and the collector ring can be efficiently ground through the rotation of the collector ring itself. The entire grinding tool has a low manufacturing cost and is suitable for the narrow working environment near the collector ring of the hydro-turbine generator set. Using it to replace the traditional collector ring grinding method can shorten the grinding process cycle and improve work efficiency.

[0009] In a possible design, the limiting mechanism includes a brush holder, a carbon brush and a fixing part. The carbon brush is fixed in the brush holder, and one end of the carbon brush is against the grinding block to limit the grinding block. The fixing part is arranged on the brush holder, and the fixing part forms a detachable connection with the flat steel bar.

[0010] In a possible design, the limiting mechanism also includes a spring sheet, which is connected to the brush holder. A second through groove is provided in the brush holder, and the second through groove is opposite to the first through groove. The carbon brush is fixedly placed in the second through groove, and the spring sheet is used to limit the axial position of the carbon brush in the second through groove.

[0011] In a possible design, the spring sheet is a U-shaped spring sheet, a limit block is provided on the inner side of the spring sheet near the U-shaped opening end, a latch tooth is provided on the outer side of the spring sheet near the U-shaped opening end, and a latch groove is provided on both sides of the brush holder, the latch groove is connected to the second through groove, the U-shaped opening end of the spring sheet is inserted into the brush holder, the latch tooth on the spring sheet is stuck in the latch groove, and the limit block on the spring sheet presses against the other end of the carbon brush to limit the carbon brush.

[0012] In a possible design, the latch is designed in a barbed hook shape, one end of which is connected to the spring sheet and the other end can be pressed into the spring sheet. The latch is engaged in the end of the slot away from the carbon brush, and the end of the limit block close to the U-shaped opening end of the spring sheet presses against the carbon brush.

[0013] In a possible design, a third through slot is provided in the fixing member, the flat steel bar is inserted into the third through slot, and the connection portion between the flat steel bar and the fixing member is adjustable.

[0014] In a possible design, the flat steel bar is provided with a plurality of threaded through holes along the length direction, the fixing piece is provided with a second mounting groove, the second mounting groove is connected with the third through groove, a docking screw hole is provided in the fixing piece, the docking screw hole is opposite to the second mounting groove, the flat steel bar and the fixing piece are connected by bolts, and the bolts pass through one of the threaded through holes and the docking screw hole.

[0015] In a possible design, the first mounting groove is designed to be inclined relative to the axial direction of the first through groove, so that the first mounting groove forms an angle with the axial direction of the first through groove.

[0016] In a possible design, the angle ranges from 10° to 30°.

[0017] In a possible design, the grinding block is an oilstone.

[0018] The beneficial effects of the present invention are:

[0019] The present invention installs the grinding tool on the collector ring brush holder through the first mounting groove on the fixed plate, fixes the grinding block in the first through groove, installs the limiting mechanism through the flat steel bar, limits the grinding block through the limiting mechanism, makes the grinding block contact with the collector ring to be ground, and can simply and efficiently complete the grinding of the collector ring through the rotation of the collector ring itself. The entire grinding tool has a low manufacturing cost and is suitable for the narrow working environment near the collector ring of the hydro-turbine generator set. Using it to replace the traditional collector ring grinding process can shorten the grinding process cycle and improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the structural connection of the channel steel ring from the first perspective;

[0023] Figure 3 This is a schematic diagram of the structural connection of the channel steel ring from the second perspective;

[0024] Figure 4 It is a schematic diagram of the structural connection of the channel steel ring from the third perspective;

[0025] Figure 5 This is a schematic diagram of the structural connection of the brush holder from the first perspective;

[0026] Figure 6 This is a schematic diagram of the structural connection of the brush holder from the second viewing angle;

[0027] Figure 7 This is a schematic diagram of the structural connection of the brush holder from the third perspective;

[0028] Figure 8 It is a schematic diagram of the structural connection of the spring sheet from the first perspective;

[0029] Fig. 9 This is a schematic diagram of the structural connection of the spring sheet from the second perspective.

[0030] In the figure: 1. channel steel ring; 2. fixing plate; 3. first mounting groove; 4. flat steel bar; 5. first through groove; 6. brush holder; 7. fixing piece; 8. second through groove; 9. spring sheet; 10. grinding block; 11. carbon brush; 12. clamping teeth; 13. bolt; 14. threaded through hole; 15. second mounting groove; 16. third through groove; 17. docking screw hole; 18. clamping groove; 19. limit block; 20. collector ring. DETAILED DESCRIPTION

[0031] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. The specific structures and functional details disclosed herein are only used to describe the exemplary embodiments of the present invention. However, the present invention can be embodied in many alternative forms, and it should not be understood that the present invention is limited to the embodiments set forth herein.

[0032] It should be understood that the terms first, second, etc. are only used to distinguish descriptions and should not be understood as indicating or suggesting relative importance. Although the terms first, second, etc. may be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another unit. For example, the first unit may be referred to as the second unit, and similarly, the second unit may be referred to as the first unit without departing from the scope of the exemplary embodiments of the present invention.

[0033] It should be understood that the term "and / or" in this article is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: A exists alone, B exists alone, and A and B exist at the same time. The term " / and" in this article describes another relationship between associated objects, indicating that two relationships may exist. For example, A / and B can represent two situations: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the previous and next associated objects are in an "or" relationship.

[0034] It should be understood that in the description of the present invention, the terms "upper", "vertical", "inside", "outside" and the like indicate orientations or positional relationships that are customarily placed when the product of the invention is used, or are orientations or positional relationships that are customarily understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] It should be understood that when an element is referred to as being "connected," "connected," or "coupled" to another element, it can be directly connected or coupled to the other element, or intervening elements may be present. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements. Other words used to describe the relationship between elements should be interpreted in a similar manner (e.g., "between" versus "directly between," "adjacent" versus "directly adjacent," etc.).

[0036] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The terms used herein are only used to describe specific embodiments and are not intended to limit the exemplary embodiments of the present invention. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms unless the context clearly indicates the opposite meaning. It should also be understood that the terms "include", "comprising", "including", and / or "comprising" when used herein specify the existence of the claimed features, integers, steps, operations, units, and / or components, and do not exclude the existence or increase of one or more other features, quantities, steps, operations, units, components, and / or their combinations.

[0038] It should also be noted that in some alternative embodiments, the functions / acts that appear may be different from the order in which the figures appear. For example, depending on the functions / acts involved, two figures shown in succession may actually be executed substantially concurrently, or may sometimes be executed in the reverse order.

[0039] In the following description, certain details are provided to facilitate a complete understanding of the example embodiments. However, it will be appreciated by those of ordinary skill in the art that the example embodiments may be implemented without these certain details. For example, the system may be shown in a block diagram to avoid obscuring the example with unnecessary details. In other embodiments, well-known processes, structures, and techniques may not be shown in unnecessary detail to avoid obscuring the example embodiments.

[0040] Embodiment 1:

[0041] This embodiment provides a grinding tool for collector rings of a hydro-turbine generator set, such as Figures 1 to 4 As shown, it includes a channel steel ring 1, a grinding block 10 and a flat steel bar 4. The channel steel ring 1 is provided with a first through groove 5, and the first through groove 5 is used to fix the grinding block 10. The flat steel bar 4 is fixedly connected to the channel steel ring 1, and a limiting mechanism is provided on the flat steel bar 4. The limiting mechanism is used to limit the grinding block 10 in the axial direction of the first through groove 5. A fixing plate 2 is provided on the side of the channel steel ring 1, and a first mounting groove 3 is provided on the fixing plate 2.

[0042] In specific applications, for the collector ring 20 that needs to be ground, a carbon brush holder can be removed from its brush holder frame, and then the grinding tool can be installed at the position of the original carbon brush holder on the collector ring brush holder frame through the first mounting groove 3 on the fixing plate 2, and the grinding block 10 is fixedly placed in the first through groove 5, and a limiting mechanism is installed through the flat steel bar 4. The grinding block 10 is limited by the limiting mechanism so that the grinding block 10 contacts the collector ring 20 that needs to be ground, and the grinding of the collector ring 20 can be efficiently completed through the rotation of the collector ring 20 itself.

[0043] The grinding block 10 can be made of oilstone, and the particle size of the oilstone can be determined according to the actual maintenance and grinding requirements. When rough processing is required, an oilstone with a larger particle size can be selected, and when fine processing is required, an oilstone with a smaller particle size can be selected. The size and shape of the oilstone are consistent with the first through groove 5 to prevent the oilstone from shaking in the first through groove 5 during the grinding process, thereby affecting the grinding effect.

[0044] The limiting mechanism can be a carbon brush holder removed when installing the grinding tool, or other limiting devices such as limiting bolts, limiting racks, etc. to limit the grinding block 10. The channel steel ring 1 and the flat steel bar 4 can be made of stainless steel, which is not easy to rust and is more durable.

[0045] Embodiment 2:

[0046] As an optimization of the above embodiment, Figures 5 to 7As shown, the limiting mechanism includes a brush holder 6, a carbon brush 11 and a fixing member 7. The carbon brush 11 is fixed in the brush holder 6, one end of the carbon brush 11 abuts against the grinding block 10 to limit the grinding block 10. The fixing member 7 is arranged on the brush holder 6, and the fixing member 7 forms a detachable connection with the flat steel bar 4. When it is used, the brush holder 6 is fixed to the flat steel bar 4 by the fixing member 7, and the collector ring 20 is ground by the carbon brush 11 abutting against the grinding block 10.

[0047] The limiting mechanism further includes a spring sheet 9, which is connected to the brush holder 6. The brush holder 6 is provided with a second through slot 8, which is opposite to the first through slot 5. A carbon brush 11 is fixedly placed in the second through slot 8. The spring sheet 9 is used to limit the position of the carbon brush 11 in the axial direction of the second through slot 8. Figures 8 to 9 As shown, the spring sheet 9 is a U-shaped spring sheet, a limit block 19 is provided on the inner side of the spring sheet 9 near the U-shaped opening end, a latch tooth 12 is provided on the outer side of the spring sheet 9 near the U-shaped opening end, a latch groove 18 is provided on both sides of the brush holder 6, the latch groove 18 is connected with the second through groove 8, the U-shaped opening end of the spring sheet 9 is inserted into the brush holder 6, the latch tooth 12 on the spring sheet 9 is stuck in the latch groove 18, and the limit block 19 on the spring sheet 9 abuts against the other end of the carbon brush 11 to limit the carbon brush 11. When it is used, the U-shaped opening end of the spring sheet 9 can be inserted into the brush holder 6, the latch tooth 12 is engaged with the latch groove 18 to limit the position of the spring sheet 9, and the limit block 19 abuts against the carbon brush 11 to complete the limit fixation of the carbon brush 11, and the size and shape of the carbon brush 11 are consistent with the second through groove 8.

[0048] The latching tooth 12 is designed in a barb shape, one end of which is connected to the spring sheet 9, and the other end can be pressed into the spring sheet 9. When not in use, the latching tooth 12 can be pressed into the spring sheet 9, and a plurality of latching teeth 12 are arranged along the spring sheet 9 to define different latching positions of the spring sheet 9. The latching tooth 12 is latched at one end of the latching groove 18 away from the carbon brush 11, and one end of the limit block 19 close to the U-shaped opening end of the spring sheet 9 presses against the carbon brush 11, and the latching tooth 12 and the limit block 19 form opposite forces, making their respective actions more stable.

[0049] Embodiment 3:

[0050] As an optimization of the above embodiment, the fixing member 7 is provided with a third through slot 16, the flat steel bar 4 is inserted into the third through slot 16, and the connection part between the flat steel bar 4 and the fixing member 7 is adjustable. The flat steel bar 4 is provided with a plurality of threaded through holes 14 along the length direction, the fixing member 7 is provided with a second mounting groove 15, the second mounting groove 15 is connected with the third through slot 16, a docking screw hole 17 is provided in the fixing member 7, the docking screw hole 17 is directly opposite to the second mounting groove 15, the flat steel bar 4 and the fixing member 7 are connected by bolts 13, and the bolts 13 pass through one of the threaded through holes 14 and the docking screw hole 17. The fixing member 7 can be quickly and conveniently disassembled and assembled by the bolts 13.

[0051] Embodiment 4:

[0052] As an optimization of the above embodiment, the first mounting groove 3 is designed to be inclined relative to the axial direction of the first through groove 5, so that the first mounting groove 3 forms an angle with the axial direction of the first through groove 5. The range of the angle is 10°-30°. By setting the inclination angle of the first mounting groove 3, when installing the grinding tool, the grinding tool can form a certain angle with the collector ring 20, so as to facilitate better grinding of different positions of the collector ring 20. The angle range of 10°-30° is a relatively ideal result obtained based on a limited number of tests, and a suitable angle range can be selected according to the actual situation.

[0053] The present invention is not limited to the above optional implementations, and anyone can derive other various forms of products under the enlightenment of the present invention. The above specific implementations should not be understood as limiting the scope of protection of the present invention. The scope of protection of the present invention should be based on the definition in the claims, and the description can be used to interpret the claims.

Claims

1. A collector ring grinding tool for a hydro-generator set, characterized by: The invention comprises a channel steel ring (1), a grinding block (10) and a flat steel bar (4); a first through groove (5) is provided in the channel steel ring (1); the grinding block (10) is fixedly placed in the first through groove (5); the flat steel bar (4) is fixedly connected to the channel steel ring (1); a limiting mechanism is provided on the flat steel bar (4); the limiting mechanism is used to limit the grinding block (10) in the axial direction of the first through groove (5); a fixing plate (2) is provided on the side of the channel steel ring (1); and a first mounting groove (3) is provided on the fixing plate (2); The limiting mechanism comprises a brush holder (6), a carbon brush (11) and a fixing member (7); the carbon brush (11) is fixed in the brush holder (6); one end of the carbon brush (11) abuts against the grinding block (10) to limit the grinding block (10); the fixing member (7) is arranged on the brush holder (6), and the fixing member (7) is detachably connected to the flat steel bar (4); The limiting mechanism further comprises a spring sheet (9), the spring sheet (9) being connected to the brush holder (6), the brush holder (6) being provided with a second through slot (8), the second through slot (8) being directly opposite to the first through slot (5), the carbon brush (11) being fixedly placed in the second through slot (8), and the spring sheet (9) being used to limit the position of the carbon brush (11) in the axial direction of the second through slot (8); The spring sheet (9) is a U-shaped spring sheet, a limiting block (19) is provided on the inner side of the spring sheet (9) near the U-shaped opening end, a latching tooth (12) is provided on the outer side of the spring sheet (9) near the U-shaped opening end, a latching groove (18) is provided on both sides of the brush holder (6), the latching groove (18) is connected to the second through groove (8), the U-shaped opening end of the spring sheet (9) is inserted into the brush holder (6), the latching tooth (12) on the spring sheet (9) is latched in the latching groove (18), and the limiting block (19) on the spring sheet (9) abuts against the other end of the carbon brush (11) to limit the carbon brush (11); The latching tooth (12) is designed in the shape of a barb, one end of which is connected to the spring sheet (9), and the other end of which can be pressed into the spring sheet (9), the latching tooth (12) is latched in the end of the latching groove (18) away from the carbon brush (11), and the end of the limit block (19) close to the U-shaped opening end of the spring sheet (9) abuts against the carbon brush (11); The fixing member (7) is provided with a third through slot (16), the flat steel bar (4) is inserted into the third through slot (16), and the connection portion between the flat steel bar (4) and the fixing member (7) is adjustable; The flat steel bar (4) is provided with a plurality of threaded through holes (14) along the length direction; the fixing member (7) is provided with a second mounting groove (15), the second mounting groove (15) is communicated with the third through groove (16); a butt screw hole (17) is provided in the fixing member (7), the butt screw hole (17) is directly opposite to the second mounting groove (15); the flat steel bar (4) and the fixing member (7) are connected by a bolt (13), and the bolt (13) passes through one of the threaded through holes (14) and the butt screw hole (17).

2. A collector ring grinding tool for a hydro-generator set according to claim 1, characterized in that: The first mounting groove (3) is designed to be inclined relative to the axial direction of the first through groove (5), so that the first mounting groove (3) and the axial direction of the first through groove (5) form an angle.

3. A collector ring grinding tool for a hydro-generator set according to claim 2, characterized in that: The angle ranges from 10° to 30°.

4. A collector ring grinding tool for a hydro-generator set according to claim 1, characterized in that: The grinding block (10) is an oil stone.

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