Collector ring inter-ring insulation device and collector ring

Abstract

The invention discloses a collector ring inter-ring insulation device and a collector ring, and belongs to the technical field of power generation equipment, the insulation device comprises an insulation column arranged between an upper ring and a lower ring, the insulation device is characterized in that the insulation column is of a sectional structure, and the insulation column comprises an upper insulation column and a lower insulation column; a middle insulating ring plate is arranged between the upper insulating column and the lower insulating column, the diameter of the upper insulating column is the same as that of the lower insulating column, and the inner side and the outer side of the middle insulating ring plate extend out of the lower insulating column. According to the insulation device, through multi-layer insulation design and mechanical cooperation, the creepage distance can be effectively increased, and the insulation performance is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power generation equipment, and particularly to an inter-ring insulation device for a slip ring and a slip ring. Background Art

[0002] The slip ring of a generator is a rotating component, and the carbon brush of the generator is a fixed component. In the generator excitation circuit composed of the slip ring and the carbon brush, the fixed component and the rotating component are in contact and conduct electricity through a pressure carbon brush. To ensure good contact, a certain pressure must be applied, which will cause mechanical wear. In addition, since there is current passing through, there will be electrical wear, resulting in frictional dust of the carbon brush. The dust not only affects the cleanliness of the slip ring chamber and increases the maintenance workload of the power station, but the greatest harm is that the conductive dust causes electrical faults such as insulation reduction or short circuit, affecting the normal operation of the generator.

[0003] At present, it is a common method to control the flow direction of carbon powder by adding baffles between the rings and cooperate with a carbon powder suction device to collect carbon powder to solve the problem of carbon powder diffusion and improve the cleanliness of the slip ring chamber. However, this baffle structure will cause carbon powder to accumulate on the baffle and the inter-ring insulating columns. The baffle is a whole structure and is fixed to the upper and lower slip rings by metal bolts. The insulating columns are also in direct contact with the upper and lower slip rings. Without other effective measures to reduce carbon powder, a large amount of carbon powder accumulates on the baffle and the insulating columns, reducing the insulation resistance and increasing the short-circuit risk. Especially, the carbon powder accumulated on the baffle and the insulating columns on the inner diameter side is not easy to observe and clean.

[0004] A Chinese patent document with the publication number CN210578157U and the publication date of May 19, 2020 discloses a slip ring with rapid heat dissipation, which is characterized in that: it includes a slip ring, a support member and a fan; the support rods of the support member are located on both outer sides of the slip ring, the support plate is located on the top of the slip ring, an air inlet cover is arranged on the upper side of the support plate, the motor of the fan is located in the air inlet cover, and the fan blades are located on the lower side of the support plate; there is a ventilation space between the upper ring and the lower ring of the slip ring.

[0005] The slip ring with rapid heat dissipation disclosed in this patent document overcomes the problem that the original slip ring has poor natural ventilation and heat dissipation effects, affecting the service life, and has the characteristics of simple structure, good heat dissipation effect, and effectively improving the service life. However, it cannot effectively increase the creepage distance, affecting the overall electrical performance and reliability of the slip ring. Summary of the Invention

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides an inter-ring insulation device for a slip ring and a slip ring. Through multi-level insulation design and mechanical cooperation, the insulation device of the present invention can effectively increase the creepage distance and achieve a significant improvement in insulation performance.

[0007] The present invention is realized through the following technical solutions: A collector ring inter-ring insulation device, comprising insulating columns arranged between an upper ring and a lower ring, characterized in that: the insulating columns are of a segmented structure, the insulating columns include upper insulating columns and lower insulating columns, and an intermediate insulating ring plate is arranged between the upper insulating columns and the lower insulating columns. The diameters of the upper insulating columns and the lower insulating columns are the same, and both the inner side and the outer side of the intermediate insulating ring plate extend out of the lower insulating columns.

[0008] The intermediate insulating ring plate includes an upper insulating plate and a lower insulating plate, and the diameters of the upper insulating plate and the lower insulating plate are the same.

[0009] A first step is arranged on the upper insulating plate, and the first step is located on the lower surface of the upper insulating plate.

[0010] A second step is arranged on the lower insulating plate, and the second step is located on the upper surface of the lower insulating plate.

[0011] The upper insulating plate and the lower insulating plate are overlapped, and the first step on the upper insulating plate is in contact with the second step on the lower insulating plate.

[0012] A collector ring, comprising an upper ring, a lower ring, fastening screws and fastening nuts. The fastening screws penetrate through the upper ring and the lower ring, and the upper ring and the lower ring are connected by the fastening screws and the fastening nuts. It is characterized in that: a collector ring inter-ring insulation device is arranged between the upper ring and the lower ring. The collector ring inter-ring insulation device includes insulating columns arranged between the upper ring and the lower ring. The insulating columns are of a segmented structure, the insulating columns include upper insulating columns and lower insulating columns, and an intermediate insulating ring plate is arranged between the upper insulating columns and the lower insulating columns. The diameters of the upper insulating columns and the lower insulating columns are the same, and both the inner side and the outer side of the intermediate insulating ring plate extend out of the lower insulating columns.

[0013] An upper baffle is arranged on the upper ring, and the upper baffle is located inside the upper ring.

[0014] A lower baffle is arranged on the lower ring, and the lower baffle is located inside the lower ring.

[0015] The intermediate insulating ring plate includes an upper insulating plate and a lower insulating plate, and the diameters of the upper insulating plate and the lower insulating plate are the same. A first groove is formed on the upper surface of the upper insulating plate, and a second groove is formed on the lower surface of the lower insulating plate.

[0016] The upper end of the upper baffle is detachably connected to the upper ring, the lower end of the upper baffle is embedded in the first groove of the upper insulating plate, the lower end of the lower baffle is detachably connected to the lower ring, and the upper end of the lower baffle is embedded in the second groove of the lower insulating plate.

[0017] When it is stated that the diameter of the upper insulating plate and the diameter of the lower insulating plate in the present invention are the same, it means that the inner diameter of the upper insulating plate is the same as the inner diameter of the lower insulating plate, the inner diameter of the upper insulating plate is the same as the inner diameter of the lower insulating plate, and the outer diameter of the upper insulating plate is the same as the outer diameter of the lower insulating plate.

[0018] The beneficial effects of the present invention are mainly manifested in the following aspects: I. In the present invention, the insulating column is of a segmented structure. The insulating column includes an upper insulating column and a lower insulating column. An intermediate insulating ring plate is provided between the upper insulating column and the lower insulating column. The diameter of the upper insulating column is the same as the diameter of the lower insulating column. The inner side and the outer side of the intermediate insulating ring plate both extend out of the lower insulating column. Compared with the prior art, through the multi-level insulation design and mechanical cooperation of the entire insulating device, the creepage distance can be effectively increased, and a significant improvement in insulation performance is achieved.

[0019] II. In the present invention, the diameter of the upper insulating column is the same as the diameter of the lower insulating column. The inner side and the outer side of the intermediate insulating ring plate both extend out of the lower insulating column. The extended length of the intermediate insulating ring plate increases the insulation creepage distance, which is beneficial to improving the insulation performance.

[0020] III. In the present invention, the upper insulating plate and the lower insulating plate are overlapped. The first step on the upper insulating plate is in contact with the second step on the lower insulating plate. The first step and the second step are aligned, further increasing the creepage distance.

[0021] IV. In the present invention, a collector ring inter-ring insulating device is provided between the upper ring and the lower ring. The collector ring inter-ring insulating device includes an insulating column provided between the upper ring and the lower ring. The insulating column is of a segmented structure. The insulating column includes an upper insulating column and a lower insulating column. An intermediate insulating ring plate is provided between the upper insulating column and the lower insulating column. The diameter of the upper insulating column is the same as the diameter of the lower insulating column. The inner side and the outer side of the intermediate insulating ring plate both extend out of the lower insulating column. Compared with the prior art, the electrical performance and reliability of the entire collector ring are greatly improved.

[0022] V. In the present invention, the intermediate insulating ring plate includes an upper insulating plate and a lower insulating plate. The diameter of the upper insulating plate is the same as the diameter of the lower insulating plate. A first groove is formed on the upper surface of the upper insulating plate, and a second groove is formed on the lower surface of the lower insulating plate. The degree of carbon powder accumulation on the inner diameter side surface area of the intermediate insulating ring plate can be used as an index to evaluate the level of the inter-pole insulation resistance, avoiding the drawback that it is not easy to observe the inside of the insulating column.

[0023] VI. In the present invention, the upper end of the upper baffle is detachably connected to the upper ring, the lower end of the upper baffle is embedded in the first groove of the upper insulating plate, the lower end of the lower baffle is detachably connected to the lower ring, and the upper end of the lower baffle is embedded in the second groove of the lower insulating plate. By adopting the embedded fit of the segmented baffles and grooves of the upper baffle and the lower baffle, a three-dimensional insulating barrier is formed, enabling the synchronous enhancement of the axial and radial insulation performance.

[0024] VII. The present invention adopts a segmented baffle structure of an upper baffle and a lower baffle, and the upper baffle and the lower baffle are detachable, enabling partial cleaning without disassembling the overall structure, thereby improving the maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further specifically described below in conjunction with the drawings in the specification and the specific embodiments, wherein: Figure 1 is a schematic structural diagram of the insulation device of the present invention; Figure 2 is a schematic structural diagram of the upper insulating plate of the present invention; Figure 3 is a schematic structural diagram of the lower insulating plate of the present invention; Figure 4 is a partial structural schematic diagram of the insulation device of the present invention installed on the slip ring; Reference numerals in the drawings: 1, upper ring; 2, lower ring; 3, upper insulating column; 4, lower insulating column; 5, intermediate insulating ring plate; 6, upper insulating plate; 7, lower insulating plate; 8, first step; 9, second step; 10, fastening screw; 11, fastening nut; 12, upper baffle; 13, lower baffle; 14, first groove; 15, second groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] Embodiment 1 Refer to Figure 1 , a slip ring inter-ring insulation device, including insulating columns arranged between the upper ring 1 and the lower ring 2. The insulating columns are of a segmented structure and include an upper insulating column 3 and a lower insulating column 4. An intermediate insulating ring plate 5 is arranged between the upper insulating column 3 and the lower insulating column 4. The diameters of the upper insulating column 3 and the lower insulating column 4 are the same, and both the inner side and the outer side of the intermediate insulating ring plate 5 extend out of the lower insulating column 4.

[0027] This embodiment is the most basic implementation mode. The insulating columns are of a segmented structure and include an upper insulating column 3 and a lower insulating column 4. An intermediate insulating ring plate 5 is arranged between the upper insulating column 3 and the lower insulating column 4. The diameters of the upper insulating column 3 and the lower insulating column 4 are the same, and both the inner side and the outer side of the intermediate insulating ring plate 5 extend out of the lower insulating column 4. Compared with the prior art, through multi-level insulation design and mechanical cooperation of the entire insulation device, the creepage distance can be effectively increased, and a significant improvement in insulation performance is achieved.

[0028] Embodiment 2 Refer to Figures 1 - 3, A collector ring inter-ring insulation device, comprising an insulating column disposed between an upper ring 1 and a lower ring 2. The insulating column is of a segmented structure and includes an upper insulating column 3 and a lower insulating column 4. An intermediate insulating ring plate 5 is disposed between the upper insulating column 3 and the lower insulating column 4. The diameters of the upper insulating column 3 and the lower insulating column 4 are the same, and both the inner and outer sides of the intermediate insulating ring plate 5 extend beyond the lower insulating column 4.

[0029] Preferably, the intermediate insulating ring plate 5 includes an upper insulating plate 6 and a lower insulating plate 7, and the diameters of the upper insulating plate 6 and the lower insulating plate 7 are the same.

[0030] A first step 8 is provided on the upper insulating plate 6, and the first step 8 is located on the lower surface of the upper insulating plate 6.

[0031] In this embodiment, which is a preferred embodiment, the diameters of the upper insulating column 3 and the lower insulating column 4 are the same, and both the inner and outer sides of the intermediate insulating ring plate 5 extend beyond the lower insulating column 4. The extending length of the intermediate insulating ring plate 5 increases the insulation creepage distance, which is beneficial to improving the insulation performance.

[0032] Embodiment 3 See Figures 1 - 3 , A collector ring inter-ring insulation device, comprising an insulating column disposed between an upper ring 1 and a lower ring 2. The insulating column is of a segmented structure and includes an upper insulating column 3 and a lower insulating column 4. An intermediate insulating ring plate 5 is disposed between the upper insulating column 3 and the lower insulating column 4. The diameters of the upper insulating column 3 and the lower insulating column 4 are the same, and both the inner and outer sides of the intermediate insulating ring plate 5 extend beyond the lower insulating column 4.

[0033] The intermediate insulating ring plate 5 includes an upper insulating plate 6 and a lower insulating plate 7, and the diameters of the upper insulating plate 6 and the lower insulating plate 7 are the same.

[0034] A first step 8 is provided on the upper insulating plate 6, and the first step 8 is located on the lower surface of the upper insulating plate 6.

[0035] A second step 9 is provided on the lower insulating plate 7, and the second step 9 is located on the upper surface of the lower insulating plate 7.

[0036] The upper insulating plate 6 and the lower insulating plate 7 are overlapped, and the first step 8 on the upper insulating plate 6 is in contact with the second step 9 on the lower insulating plate 7.

[0037] In this embodiment, which is another preferred embodiment, the upper insulating plate 6 and the lower insulating plate 7 are overlapped, and the first step 8 on the upper insulating plate 6 is in contact with the second step 9 on the lower insulating plate 7. The first step 8 and the second step 9 are mated, further increasing the creepage distance.

[0038] Embodiment 4 See Figures 1 - 4, A slip ring, comprising an upper ring 1, a lower ring 2, a fastening screw 10 and a fastening nut 11. The fastening screw 10 passes through the upper ring 1 and the lower ring 2, and the upper ring 1 and the lower ring 2 are connected by the fastening screw 10 and the fastening nut 11. A slip ring inter-ring insulation device is arranged between the upper ring 1 and the lower ring 2. The slip ring inter-ring insulation device includes insulating columns arranged between the upper ring 1 and the lower ring 2. The insulating columns are of a segmented structure and include an upper insulating column 3 and a lower insulating column 4. An intermediate insulating ring plate 5 is arranged between the upper insulating column 3 and the lower insulating column 4. The diameters of the upper insulating column 3 and the lower insulating column 4 are the same, and the inner and outer sides of the intermediate insulating ring plate 5 both extend out of the lower insulating column 4.

[0039] This embodiment is another preferred embodiment. A slip ring inter-ring insulation device is arranged between the upper ring 1 and the lower ring 2. The slip ring inter-ring insulation device includes insulating columns arranged between the upper ring 1 and the lower ring 2. The insulating columns are of a segmented structure and include an upper insulating column 3 and a lower insulating column 4. An intermediate insulating ring plate 5 is arranged between the upper insulating column 3 and the lower insulating column 4. The diameters of the upper insulating column 3 and the lower insulating column 4 are the same, and the inner and outer sides of the intermediate insulating ring plate 5 both extend out of the lower insulating column 4. Compared with the prior art, the electrical performance and reliability of the entire slip ring are greatly improved.

[0040] Embodiment 5 See Figures 1 - 4 , A slip ring, comprising an upper ring 1, a lower ring 2, a fastening screw 10 and a fastening nut 11. The fastening screw 10 passes through the upper ring 1 and the lower ring 2, and the upper ring 1 and the lower ring 2 are connected by the fastening screw 10 and the fastening nut 11. A slip ring inter-ring insulation device is arranged between the upper ring 1 and the lower ring 2. The slip ring inter-ring insulation device includes insulating columns arranged between the upper ring 1 and the lower ring 2. The insulating columns are of a segmented structure and include an upper insulating column 3 and a lower insulating column 4. An intermediate insulating ring plate 5 is arranged between the upper insulating column 3 and the lower insulating column 4. The diameters of the upper insulating column 3 and the lower insulating column 4 are the same, and the inner and outer sides of the intermediate insulating ring plate 5 both extend out of the lower insulating column 4.

[0041] An upper baffle 12 is arranged on the upper ring 1, and the upper baffle 12 is located inside the upper ring 1.

[0042] A lower baffle 13 is arranged on the lower ring 2, and the lower baffle 13 is located inside the lower ring 2.

[0043] Preferably, the intermediate insulating ring plate 5 includes an upper insulating plate 6 and a lower insulating plate 7. The diameters of the upper insulating plate 6 and the lower insulating plate 7 are the same. A first groove 14 is formed on the upper surface of the upper insulating plate 6, and a second groove 15 is formed on the lower surface of the lower insulating plate 7.

[0044] This embodiment is another preferred embodiment. The intermediate insulating ring plate 5 includes an upper insulating plate 6 and a lower insulating plate 7. The diameters of the upper insulating plate 6 and the lower insulating plate 7 are the same. A first groove 14 is formed on the upper surface of the upper insulating plate 6, and a second groove 15 is formed on the lower surface of the lower insulating plate 7. The degree of carbon powder accumulation on the inner diameter side surface area of the intermediate insulating ring plate 5 can be used as an index to evaluate the level of the inter-pole insulation resistance, avoiding the drawback that it is not easy to observe the inside of the insulating column.

[0045] Embodiment 6 See Figures 1 - 4 , a slip ring, comprising an upper ring 1, a lower ring 2, a fastening screw 10 and a fastening nut 11. The fastening screw 10 passes through the upper ring 1 and the lower ring 2, and the upper ring 1 and the lower ring 2 are connected by the fastening screw 10 and the fastening nut 11. An inter-ring insulating device of the slip ring is arranged between the upper ring 1 and the lower ring 2. The inter-ring insulating device of the slip ring includes insulating columns arranged between the upper ring 1 and the lower ring 2. The insulating columns are of a segmented structure. The insulating columns include an upper insulating column 3 and a lower insulating column 4. An intermediate insulating ring plate 5 is arranged between the upper insulating column 3 and the lower insulating column 4. The diameters of the upper insulating column 3 and the lower insulating column 4 are the same. The inner and outer sides of the intermediate insulating ring plate 5 both extend out of the lower insulating column 4.

[0046] An upper baffle 12 is arranged on the upper ring 1, and the upper baffle 12 is located inside the upper ring 1.

[0047] A lower baffle 13 is arranged on the lower ring 2, and the lower baffle 13 is located inside the lower ring 2.

[0048] The intermediate insulating ring plate 5 includes an upper insulating plate 6 and a lower insulating plate 7. The diameters of the upper insulating plate 6 and the lower insulating plate 7 are the same. A first groove 14 is formed on the upper surface of the upper insulating plate 6, and a second groove 15 is formed on the lower surface of the lower insulating plate 7.

[0049] Further preferably, the upper end of the upper baffle 12 is detachably connected to the upper ring 1, the lower end of the upper baffle 12 is embedded in the first groove 14 of the upper insulating plate 6, the lower end of the lower baffle 13 is detachably connected to the lower ring 2, and the upper end of the lower baffle 13 is embedded in the second groove 15 of the lower insulating plate 7.

[0050] This embodiment is the best embodiment. The upper end of the upper baffle 12 is detachably connected to the upper ring 1, the lower end of the upper baffle 12 is embedded in the first groove 14 of the upper insulating plate 6, the lower end of the lower baffle 13 is detachably connected to the lower ring 2, and the upper end of the lower baffle 13 is embedded in the second groove 15 of the lower insulating plate 7. By adopting the embedded fit of the segmented baffles and grooves of the upper baffle 12 and the lower baffle 13, a three-dimensional insulating barrier is formed, so that the axial and radial insulation performances are enhanced synchronously.

[0051] Adopting the segmented baffle structure of the upper baffle 12 and the lower baffle 13, and the upper baffle 12 and the lower baffle 13 are detachable, so that partial cleaning can be carried out without disassembling the overall structure, which improves the maintenance efficiency.

[0052] For the collector ring of the present invention, the fastening screw 10 penetrates through the upper ring 1 and the lower ring 2, and the upper ring 1 and the lower ring 2 are connected by the fastening nut 11. A collector ring inter-ring insulation device is arranged between the upper ring 1 and the lower ring 2. The collector ring inter-ring insulation device includes upper insulating columns 3 and lower insulating columns 4 with the same diameter. The upper insulating columns 3 and the lower insulating columns 4 are separated by a larger intermediate insulating ring plate 5 to form a stepped insulation structure, realizing electrical isolation between rings while maintaining mechanical connection.

[0053] Under the condition of not changing the main structure, the creepage distance of the insulating columns is increased by more than 2.5 times; the creepage distance of the inner diameter side baffle of the collector ring is increased by more than 2 times; the transverse insulation structure of the intermediate insulating ring plate 5 greatly improves the longitudinal insulation performance between rings; greatly improves the overall electrical performance and reliability of the collector ring, and is applicable to the insulation of the collector ring of the hydro-generator.

Claims

1. A collector ring inter-ring insulation device, comprising insulating columns arranged between an upper ring (1) and a lower ring (2), characterized in that: The insulating column is of a segmented structure. The insulating column includes an upper insulating column (3) and a lower insulating column (4). An intermediate insulating ring plate (5) is provided between the upper insulating column (3) and the lower insulating column (4). The diameter of the upper insulating column (3) is the same as that of the lower insulating column (4). The inner and outer sides of the intermediate insulating ring plate (5) both extend beyond the lower insulating column (4).

2. The collector ring inter-ring insulation device according to claim 1, characterized in that: The intermediate insulating ring plate (5) includes an upper insulating plate (6) and a lower insulating plate (7). The diameter of the upper insulating plate (6) is the same as that of the lower insulating plate (7).

3. The inter-ring insulation device of a slip ring according to claim 2, characterized in that: A first step (8) is provided on the upper insulating plate (6). The first step (8) is located on the lower surface of the upper insulating plate (6).

4. The inter-ring insulation device of a collector ring according to claim 3, characterized in that: A second step (9) is provided on the lower insulating plate (7). The second step (9) is located on the upper surface of the lower insulating plate (7).

5. The inter-ring insulation device of a collector ring according to claim 4, characterized in that: The upper insulating plate (6) and the lower insulating plate (7) are overlapped. The first step (8) on the upper insulating plate (6) is in contact with the second step (9) on the lower insulating plate (7).

6. A collector ring, comprising an upper ring (1), a lower ring (2), fastening screws (10) and fastening nuts (11), the fastening screws (10) penetrate through the upper ring (1) and the lower ring (2), and the upper ring (1) and the lower ring (2) are connected by the fastening screws (10) and the fastening nuts (11), characterized in that: A collector ring inter-ring insulating device is provided between the upper ring (1) and the lower ring (2). The collector ring inter-ring insulating device includes an insulating column provided between the upper ring (1) and the lower ring (2). The insulating column is of a segmented structure. The insulating column includes an upper insulating column (3) and a lower insulating column (4). An intermediate insulating ring plate (5) is provided between the upper insulating column (3) and the lower insulating column (4). The diameter of the upper insulating column (3) is the same as that of the lower insulating column (4). The inner and outer sides of the intermediate insulating ring plate (5) both extend beyond the lower insulating column (4).

7. The collector ring according to claim 6, characterized in that: An upper baffle (12) is provided on the upper ring (1). The upper baffle (12) is located inside the upper ring (1).

8. The collector ring according to claim 7, characterized in that: A lower baffle (13) is provided on the lower ring (2). The lower baffle (13) is located inside the lower ring (2).

9. The collector ring according to claim 8, wherein: The intermediate insulating ring plate (5) includes an upper insulating plate (6) and a lower insulating plate (7). The diameter of the upper insulating plate (6) is the same as that of the lower insulating plate (7). A first groove (14) is formed on the upper surface of the upper insulating plate (6), and a second groove (15) is formed on the lower surface of the lower insulating plate (7).

10. A collector ring according to claim 9, characterized in that: The upper end of the upper baffle (12) is detachably connected to the upper ring (1). The lower end of the upper baffle (12) is embedded in the first groove (14) of the upper insulating plate (6). The lower end of the lower baffle (13) is detachably connected to the lower ring (2). The upper end of the lower baffle (13) is embedded in the second groove (15) of the lower insulating plate (7).

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