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CN-224217340-U - High-performance coil end insulation

CN224217340UCN 224217340 UCN224217340 UCN 224217340UCN-224217340-U

Abstract

The utility model relates to the technical field of coils and discloses a high-performance coil end insulator, which comprises a coil and an iron yoke arranged at the middle end of the coil, wherein two groups of mutually symmetrical insulating end covers are arranged at two ends of the iron yoke, two groups of mutually symmetrical limiting assemblies are arranged at two ends of the outer wall of the insulating end cover, which is far away from the coil, of the insulating end cover, and two groups of mutually symmetrical protection assemblies are inserted at two sides of the outer wall of the insulating end cover. The insulating end cover adopts the epoxy impregnated paper and epoxy resin composite insulating material, has the dielectric property of the insulating paper and the mechanical strength of the epoxy resin, forms a compact and compact integrated structure, can effectively control electric field distribution, reduce local electric field strength, reduce electric arc and discharge risks, can form a uniform and compact insulating layer after the epoxy resin is poured, effectively prevents moisture, pollutants and the like from entering the coil, and can effectively improve the tensile strength and the shock resistance of the cable accessory due to the good mechanical property of the epoxy resin.

Inventors

  • ZHU JINGZHI
  • ZHU ZHIYOU
  • LU XIUTANG

Assignees

  • 江苏雷特电机股份有限公司

Dates

Publication Date
20260508
Application Date
20250506

Claims (7)

  1. 1. The utility model provides a high performance coil end is insulating, includes coil (1) and locates yoke iron (2) of coil (1) middle-end, wherein yoke iron (2) both ends are equipped with two sets of insulating end covers (5) of mutual symmetry, the outer wall both ends that coil (1) were kept away from to insulating end cover (5) are equipped with two sets of spacing subassembly (3) of mutual symmetry, two sets of protection components (4) of mutual symmetry are inserted to insulating end cover (5) outer wall both sides, protection components (4) are including inserting locating rubber pad (41) of insulating end cover (5) outer wall, rubber pad (41) inner wall has been inserted and is equipped with foam-rubber pad (42), foam-rubber pad (42) inner wall has been inserted and is equipped with second insulating cover (43), second insulating cover (43) middle-end has been inserted and is equipped with end line (44).
  2. 2. The high-performance coil end insulation according to claim 1, wherein the insulation end cover (5) is made of an insulation material compounded by epoxy impregnated paper and epoxy resin.
  3. 3. The high-performance coil end insulation device of claim 1, wherein the limiting component (3) comprises a limiting frame (31) fixedly arranged on the outer wall of the insulation end cover (5), a sliding plate (32) is movably inserted into the middle end of the limiting frame (31), a limiting rod (33) is fixedly inserted into the middle end of the sliding plate (32), the limiting rod (33) movably penetrates through the middle end of the limiting frame (31), a first insulation sleeve (35) is sleeved on the outer wall of the front end of the limiting rod (33), a jack matched with the first insulation sleeve (35) is formed in the outer wall of the iron yoke (2), and the first insulation sleeve (35) is movably inserted into the jack.
  4. 4. The high-performance coil end insulation structure of claim 3, wherein the outer wall of the limit rod (33) positioned in the limit frame (31) is movably sleeved with a spring (36), and two ends of the spring (36) are fixedly connected with the limit frame (31) and the slide plate (32) respectively.
  5. 5. A high-performance coil end insulation as claimed in claim 3, characterized in that the end of the stop rod (33) remote from the first insulation sleeve (35) is fixedly provided with a disc (34).
  6. 6. The high-performance coil end insulator as set forth in claim 1, wherein a third insulating sleeve (6) is fixedly inserted into the middle end of the insulating end cover (5), and the third insulating sleeve (6) is attached to the outer wall of the iron yoke (2).
  7. 7. The high-performance coil end insulation according to claim 6, wherein the rubber pad (41) is connected with the coil (1), and the third insulation sleeve (6) and the second insulation sleeve (43) are made of polyimide.

Description

High-performance coil end insulation Technical Field The utility model relates to the technical field of coils, in particular to a high-performance coil end insulator. Background Because the coil has right angles (sharp angles) at the end parts, electric field concentration is easy to generate discharge phenomenon at the sharp angles, in order to avoid the excessive concentration of electric field, end insulation is added at the two end parts of the coil, the end insulation material of the conventional dry type iron core reactor is generally an epoxy plate or DMD paper with the thickness of 0.5mm, the end insulation material is stacked to be the same as the thickness of the coil, the end insulation material with higher relative dielectric coefficient is selected, the electric field intensity is generally reduced by several times when the relative dielectric coefficient is larger than that of air, and the other problem of the end insulation is to prevent the coil from discharging or creepage to the iron core or the iron yoke. The end insulation and the coil should be in close contact as much as possible to avoid air gap discharge, however, the epoxy plate or DMD used in the existing coil end insulation is enclosed into a circle by overlapping one layer by one layer, so many gaps exist between the end insulation and the coil, and the coil cannot be prevented from creeping at the end. Disclosure of utility model In view of the fact that the end insulation and the coil should be in close contact as much as possible to avoid air gap discharge, however, the epoxy plates or DMDs used in the existing coil end insulation are enclosed into a circle by overlapping one layer by one layer, so that many gaps exist between the end insulation and the coil, and the problem that the coil cannot climb up at the end is solved. In order to solve the technical problems, the high-performance coil end insulation comprises a coil and an iron yoke arranged at the middle end of the coil, two groups of mutually symmetrical insulation end covers are arranged at two ends of the iron yoke, two groups of mutually symmetrical limiting components are arranged at two ends of the outer wall of the insulation end cover, which is far away from the coil, two groups of mutually symmetrical protection components are inserted at two sides of the outer wall of the insulation end cover, the protection components comprise rubber pads inserted into the outer wall of the insulation end cover, sponge pads are inserted into the inner walls of the rubber pads, second insulation sleeves are inserted into the inner walls of the sponge pads, and end wires are inserted into the middle ends of the second insulation sleeves. As a preferable scheme of the high-performance coil end insulation, the insulation end cover is made of an insulation material compounded by epoxy impregnated paper and epoxy resin. As a preferable scheme of the high-performance coil end insulation, the limiting assembly comprises a limiting frame fixedly arranged on the outer wall of the insulation end cover, a sliding plate is movably inserted into the middle end of the limiting frame, a limiting rod is fixedly inserted into the middle end of the sliding plate, the limiting rod movably penetrates through the middle end of the limiting frame, a first insulation sleeve is sleeved on the outer wall of the front end of the limiting rod, a jack matched with the first insulation sleeve is formed in the outer wall of the iron yoke, and the first insulation sleeve is movably inserted into the jack. As a preferable scheme of the high-performance coil end insulation, the coil end insulation device is characterized in that a spring is movably sleeved on the outer wall of the limiting rod, which is positioned in the limiting frame, and two ends of the spring are fixedly connected with the limiting frame and the sliding plate respectively. As a preferable scheme of the high-performance coil end insulation, a disc is fixedly arranged at one end of the limiting rod, which is far away from the first insulation sleeve. As a preferable scheme of the high-performance coil end insulation, a third insulation sleeve is fixedly inserted into the middle end of the insulation end cover, and the third insulation sleeve is attached to the outer wall of the iron yoke. As a preferable scheme of the high-performance coil end insulation, the rubber pad is connected with the coil, and the third insulation sleeve and the second insulation sleeve are made of polyimide. Compared with the prior art, the utility model has at least the following beneficial effects: 1. according to the utility model, the insulating end cover is made of the epoxy impregnated paper and epoxy resin composite insulating material, and has the dielectric property of the insulating paper and the mechanical strength of the epoxy resin, so that a compact and compact integrated structure is formed, the electric field distribution can be effectively contr