Novel rotor magnetic pole lead fixing device for pumped storage unit

Abstract

The utility model discloses a novel pumped storage unit rotor magnetic pole lead fixing device, which relates to the technical field of electric power engineering and comprises a rotor support, a first magnetic pole, a second magnetic pole and a magnetic pole connecting piece. The first magnetic pole and the second magnetic pole are symmetrically installed on the rotor support, and the two sides of the magnetic pole connecting piece are fixedly installed between the first magnetic pole and the second magnetic pole through bolts and nuts. The installation plate is fixedly installed on the rotor support through bolts and nuts, the two fixing check blocks are arranged on the two sides of the installation plate respectively, installation holes are formed in the fixing check blocks, two connecting holes are formed in the magnetic pole connecting piece, and the two stay bolts are fixedly installed between the installation holes and the connecting holes in a penetrating mode respectively. And the auxiliary mounting assembly is arranged between the two fixed stop blocks.

Description

Technical Field

[0001] This utility model relates to the field of power engineering technology, specifically to a novel rotor magnetic pole lead fixing device for pumped storage units. Background Technology

[0002] The rotor of a pumped storage unit consists of several or dozens of magnetic poles connected in series, with the poles mounted on a rotor support. The connection device between the magnetic poles must ensure thermal stability when the rotor is subjected to large currents, maintain mechanical structural stability under harsh conditions such as high speed and bidirectional rotation, and ensure good insulation performance between the rotor leads and ground. Therefore, the structure is relatively complex and prone to failure due to insulation damage and other reasons.

[0003] Currently, most pumped storage turbine rotor pole connections in my country use copper busbars as inter-pole connecting plates. Copper busbars have good electrical conductivity, and proper selection of the copper busbar cross-section can ensure thermal stability when carrying rated current.

[0004] In the existing technology, the pole connecting plates are fixed to the fixed blocks on the rotor using tie rod bolts to ensure the mechanical stability of the pole connecting plates when the unit rotates at high speed. However, the tie rod bolts currently have threads on the outside, which will cause cutting of the surrounding insulating tubes during use, resulting in insufficient insulation.

[0005] Therefore, it is necessary to invent a new type of rotor magnetic pole lead fixing device for pumped storage units to solve the above problems. Utility Model Content

[0006] To address the aforementioned problems, this utility model provides a novel rotor magnetic pole lead fixing device for pumped storage units, which solves the problem of insufficient insulation during installation in the prior art.

[0007] The technical solution adopted by this utility model is as follows: it includes a rotor support, a first magnetic pole, a second magnetic pole, and a magnetic pole connecting piece; the first and second magnetic poles are symmetrically mounted on the rotor support, and the two sides of the magnetic pole connecting piece are fixedly mounted between the first and second magnetic poles by bolts and nuts. It also includes a mounting plate, fixing blocks, tie rod bolts, and auxiliary mounting components; the mounting plate is fixedly mounted on the rotor support by bolts and nuts, two fixing blocks are configured and respectively set on both sides of the mounting plate, and the fixing blocks have mounting holes. The magnetic pole connecting piece has two connecting holes, and two tie rod bolts are configured and respectively fixedly mounted through the mounting holes and connecting holes. The auxiliary mounting components are set between the two fixing blocks.

[0008] Furthermore, preferably, an insulating pad is provided for movable contact between the tie rod bolt and the fixed stop block.

[0009] Furthermore, as a preferred embodiment, the portion of the tie rod bolt within the fixed stop is configured as a smooth rod structure, and this section of the tie rod bolt is covered with epoxy-impregnated mica tape, with an insulating tube surrounding the mica tape.

[0010] Furthermore, as a preferred embodiment, the mounting plate is provided with symmetrical cylindrical holes, and an insertion block is fixed on the fixing block. The insertion block is detachably slidably disposed in the cylindrical hole, and a welding gap is configured between the fixing block and the mounting plate.

[0011] Furthermore, preferably, the auxiliary installation assembly includes a positioning base, a sliding column, a threaded cylinder, a threaded rod, and positioning balls; a rectangular hole is provided in the middle of the mounting plate, the positioning base is detachably slidably disposed in the rectangular hole, the sliding column is slidably disposed in the positioning base, the threaded cylinder is fixed at the end of the sliding column away from the positioning base, two threaded rods are mirror-arranged and threadedly connected to the two ends of the threaded cylinder, guide holes are provided on the sidewalls of the two fixed blocks that are close to each other, the cross-section of the guide holes is arc-shaped, and two positioning balls are provided, respectively fixed to the two threaded rods at the ends away from the threaded cylinder, and the two positioning balls are in movable contact with the two guide holes.

[0012] Furthermore, as a preferred embodiment, the auxiliary installation component also includes a connecting key and a gear; there are two connecting keys, which are respectively fixed to two threaded rods at one end close to each other, and an internal groove is provided in the center of the threaded cylinder. An avoidance hole is provided on the side wall of the internal groove away from the sliding column, and the gear is slidably mounted on the two connecting keys.

[0013] Furthermore, as a preferred embodiment, it also includes a fixed shaft and a second gear; the fixed shaft is fixed between the two side walls of the clearance hole, and the second gear is rotatably mounted on the fixed shaft, and the second gear meshes with the first gear.

[0014] Advantages of this utility model:

[0015] The tie rod bolt configured as a smooth rod can avoid the original thread cutting damage to the external insulating tube. At the same time, multiple layers of mica tape are used to form a multi-layer insulation layer between the tie rod bolt and the insulating tube to enhance insulation and eliminate the gap formed at the original thread, thereby improving the operating strength.

[0016] By using the auxiliary installation components, the deflection angle of the two fixed blocks can be finely adjusted simultaneously, so that the mounting holes on the magnetic pole connecting plate are aligned with the connecting holes of the fixed blocks. This avoids excessive force on the fixed block section when the tie rod bolt is installed, and prevents the screw thread from cutting the outer insulating tube like a blade under the pressure of installation deviation, thus avoiding damage to the insulating tube and further improving insulation.

[0017] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the tie rod bolt structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the connection between the fixing block and the mounting plate of this utility model;

[0022] Figure 4 This is a front view structural diagram of the auxiliary installation component of this utility model;

[0023] Figure 5 This is a top view sectional view of the auxiliary installation component of this utility model;

[0024] Figure 6 This is an enlarged view of section A of this utility model.

[0025] Reference numerals: 1. Rotor support; 2. Magnetic pole one; 3. Magnetic pole two; 4. Magnetic pole connecting piece; 5. Mounting plate; 6. Fixing block; 7. Tie rod bolt; 8. Insulating pad; 9. Auxiliary installation assembly; 71. Insulating tube; 61. Insertion block; 62. Welding gap; 91. Positioning base; 92. Sliding column; 93. Threaded cylinder; 94. Threaded rod; 95. Positioning ball; 96. Connecting key; 97. Gear one; 98. Fixed shaft; 99. Gear two; 63. Guide hole; 931. Internal groove; 932. Clearance hole. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining this utility model and are not intended to limit this utility model.

[0027] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] refer to Figures 1 to 6 A novel rotor magnetic pole lead fixing device for a pumped storage unit includes a rotor support 1, a first magnetic pole 2, a second magnetic pole 3, and a magnetic pole connecting piece 4. The first magnetic pole 2 and the second magnetic pole 3 are symmetrically mounted on the rotor support 1. The magnetic pole connecting piece 4 is fixedly mounted between the first magnetic pole 2 and the second magnetic pole 3 using bolts and nuts on both sides. The device also includes a mounting plate 5, fixing blocks 6, tie rod bolts 7, and auxiliary mounting components 9. The mounting plate 5 is fixedly mounted on the rotor support 1 using bolts and nuts. Two fixing blocks 6 are respectively disposed on both sides of the mounting plate 5. Each fixing block 6 has a mounting hole. The magnetic pole connecting piece 4 has two connecting holes. Two tie rod bolts 7 are respectively fixedly mounted through the mounting holes and connecting holes. The auxiliary mounting components 9 are disposed between the two fixing blocks 6.

[0029] In one embodiment of this utility model, an insulating pad 8 is in movable contact between the tie rod bolt 7 and the fixed stop block 6.

[0030] In one embodiment of this utility model, the portion of the tie rod bolt 7 within the fixed stop block 6 is configured as a smooth rod structure, and this section of the tie rod bolt 7 is covered with epoxy-impregnated mica tape, with an insulating tube 71 fitted around the mica tape.

[0031] When installing the tie rod bolt 7, wrap several layers of mica tape impregnated with epoxy resin around the connection part with the insulating tube 71. Then, before the epoxy resin cures, put the insulating tube 71 on the mica tape while it is still soft. Finally, install the tie rod bolt 7 into the fixing block 6 and fix it firmly to the magnetic pole connecting piece 4.

[0032] Specifically, the tie rod bolt 7 configured as a bare rod can avoid the original thread cutting damage to the external insulating tube 71; multiple layers of insulation are formed between the tie rod bolt 7 and the insulating tube 71 through multiple layers of mica tape. Even if one layer of insulation is damaged, the remaining insulation layers can still ensure the stable operation of the unit, thereby enhancing the insulation strength, eliminating the gap formed at the original thread, increasing the stress surface, and improving the operating strength.

[0033] In one embodiment of this utility model, cylindrical holes are symmetrically provided on the mounting plate 5, and an insertion block 61 is fixed on the fixing block 6. The insertion block 61 is detachably slidably disposed in the cylindrical hole, and a welding gap 62 is configured between the fixing block 6 and the mounting plate 5.

[0034] In other words, when installing the fixed block 6, first insert the two insert blocks 61 into the two cylindrical holes respectively, and then use the auxiliary installation component 9 to position the two fixed blocks 6 so that the installation hole and the connection hole are aligned.

[0035] In one embodiment of this utility model, the auxiliary installation component 9 includes a positioning base 91, a sliding column 92, a threaded cylinder 93, a threaded rod 94, and positioning balls 95. A rectangular hole is provided in the middle of the mounting plate 5. The positioning base 91 is detachably slidably disposed in the rectangular hole. The sliding column 92 is slidably disposed in the positioning base 91. The threaded cylinder 93 is fixed to the end of the sliding column 92 away from the positioning base 91. Two threaded rods 94 are mirror-arranged and are threadedly connected to the two ends of the threaded cylinder 93, respectively. Guide holes 63 are provided on the side walls of the two fixed blocks 6 that are close to each other. The cross-section of the guide holes 63 is arc-shaped. Two positioning balls 95 are provided and are fixed to the ends of the two threaded rods 94 away from the threaded cylinder 93, and the two positioning balls 95 are in movable contact with the two guide holes 63, respectively.

[0036] In one embodiment of this utility model, the auxiliary installation component 9 further includes a connecting key 96 and a gear 97; two connecting keys 96 are configured and fixed to two threaded rods 94 at one end close to each other; an internal groove 931 is provided in the center of the threaded cylinder 93; an avoidance hole 932 is provided on the side wall of the end of the internal groove 931 away from the sliding column 92; and the gear 97 is slidably mounted on the two connecting keys 96.

[0037] In one embodiment of the present invention, a fixed shaft 98 and a second gear 99 are further included; the fixed shaft 98 is fixed between the two side walls of the clearance hole 932, and the second gear 99 is rotatably mounted on the fixed shaft 98, and the second gear 99 meshes with the first gear 97.

[0038] Please see Figures 4 to 6Rotating gear 2 99 drives gear 1 97 to rotate. When gear 1 97 rotates, it drives the two connecting keys 96 to rotate synchronously, which in turn drives the two threaded rods 94 to rotate synchronously. Therefore, the two threaded rods 94 will drive the two positioning balls 95 to move away or move closer to each other synchronously. Thus, the rotation angle of the two fixed blocks 6 can be finely adjusted at the same time to ensure that the connecting hole and the mounting hole are aligned. This facilitates the smooth passage of the tie rod bolt 7 through the connecting hole and the mounting hole, and avoids excessive force on the fixed block 6 section when the tie rod bolt 7 is installed. It also prevents the screw thread from cutting the outer insulating tube 71 like a knife blade under the pressure of installation deviation, thus avoiding damage to the insulating tube 71.

[0039] Specifically, when installing the two tie rod bolts 7, firstly, fix the mounting plate 5, then insert the two fixing blocks 6 into the cylindrical holes through the insert blocks 61, then insert the positioning base 91 into the rectangular hole, and simultaneously insert the two positioning balls 95 into the two guide holes 63. Then, rotate the gear 2 99 to slightly adjust the deflection angle of the two fixing blocks 6 so that the mounting hole and the connecting hole are aligned. Then, insert the tie rod bolts 7 between the mounting hole and the connecting hole and fix them. After that, remove the auxiliary installation component 9, and finally weld the edge of the welding gap 62 to fix it. This completes the entire installation work.

[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel rotor magnetic pole lead fixing device for a pumped storage unit, comprising a rotor support (1), a first magnetic pole (2), a second magnetic pole (3), and a magnetic pole connecting piece (4); the first magnetic pole (2) and the second magnetic pole (3) are symmetrically mounted on the rotor support (1), and the two sides of the magnetic pole connecting piece (4) are fixedly mounted between the first magnetic pole (2) and the second magnetic pole (3) by bolts and nuts, characterized in that, It also includes a mounting plate (5), a fixing block (6), a tie rod bolt (7), and an auxiliary mounting component (9); the mounting plate (5) is fixedly mounted on the rotor support (1) with bolts and nuts; there are two fixing blocks (6), which are respectively set on both sides of the mounting plate (5); the fixing blocks (6) have mounting holes; the magnetic pole connecting piece (4) has two connecting holes; there are two tie rod bolts (7), which are respectively fixedly mounted between the mounting holes and the connecting holes; and the auxiliary mounting component (9) is set between the two fixing blocks (6).

2. A novel fixing device for the lead of the magnetic pole of the rotor of a pumped storage unit according to claim 1, characterized in that, An insulating pad (8) is in movable contact between the tie rod bolt (7) and the fixed stop (6).

3. A novel fixing device for the lead of the magnetic pole of the rotor of a pumped storage unit according to claim 1, characterized in that, The portion of the tie rod bolt (7) within the fixed stop (6) is configured as a smooth rod structure, and this section of the tie rod bolt (7) is covered with epoxy-impregnated mica tape, with an insulating tube (71) surrounding the mica tape.

4. A novel fixing device for the lead of the magnetic pole of the rotor of a pumped storage unit according to claim 1, characterized in that, Cylindrical holes are symmetrically provided on the mounting plate (5), and an insertion block (61) is fixed on the fixing block (6). The insertion block (61) is detachably slidably disposed in the cylindrical hole, and a welding gap (62) is configured between the fixing block (6) and the mounting plate (5).

5. A novel fixing device for the lead of the magnetic pole of the rotor of a pumped storage unit according to claim 1, characterized in that, The auxiliary installation component (9) includes a positioning base (91), a sliding column (92), a threaded cylinder (93), a threaded rod (94), and positioning balls (95). A rectangular hole is provided in the middle of the mounting plate (5). The positioning base (91) is detachably slidably disposed in the rectangular hole. The sliding column (92) is slidably disposed in the positioning base (91). The threaded cylinder (93) is fixed at the end of the sliding column (92) away from the positioning base (91). Two threaded rods (94) are arranged in a mirror image and are threadedly connected to the two ends of the threaded cylinder (93). Guide holes (63) are provided on the side walls of the two fixed blocks (6) that are close to each other. The cross-section of the guide hole (63) is arc-shaped. Two positioning balls (95) are provided and are fixed at the ends of the two threaded rods (94) away from the threaded cylinder (93). The two positioning balls (95) are in active contact with the two guide holes (63).

6. A novel pumped storage unit rotor pole lead fixing device according to claim 5, characterized in that, The auxiliary installation component (9) also includes a connecting key (96) and a gear (97); there are two connecting keys (96), which are fixed to two threaded rods (94) close to each other at one end. The threaded cylinder (93) has an internal groove (931) in the center. The side wall of the internal groove (931) away from the sliding column (92) has a clearance hole (932). The gear (97) is slidably mounted on the two connecting keys (96).

7. A novel pumped storage unit rotor pole lead fixing device according to claim 6, characterized in that, It also includes a fixed shaft (98) and a second gear (99); the fixed shaft (98) is fixed between the two side walls of the clearance hole (932), and the second gear (99) is mounted and rotatably disposed on the fixed shaft (98), and the second gear (99) meshes with the first gear (97).

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