CN212381012U - Mining permanent magnet motor winding insulation structure - Google Patents
Mining permanent magnet motor winding insulation structure Download PDFInfo
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- CN212381012U CN212381012U CN202020863367.7U CN202020863367U CN212381012U CN 212381012 U CN212381012 U CN 212381012U CN 202020863367 U CN202020863367 U CN 202020863367U CN 212381012 U CN212381012 U CN 212381012U
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Abstract
The utility model discloses a mining permanent magnet motor winding insulation structure, which comprises a main insulation, an in-groove insulation component and a wiring insulation component; the main insulation is wrapped on the outer side of the coil; the in-groove insulation assembly comprises a winding, a groove bottom filler strip, a groove insulation, an interlayer filler strip, an adjusting filler strip and a groove wedge; the winding is composed of a left winding and a right winding; the wiring insulation assembly comprises parallel connection insulation, collector ring wiring insulation and cable wiring insulation. The utility model discloses a to winding, inslot, wiring department all carry out insulation treatment's mode, realized the purpose of the whole insulating nature reinforcing of winding structure, combine complementally through VPI dip coating and ordinary dip coating, improve the whole sealed effect, its insulation system's material is ripe, is fit for mass production, and waterproof nature inspection method simply uses convenient operation.
Description
Technical Field
The utility model relates to a permanent-magnet machine field, concretely relates to mining permanent-magnet machine winding insulation system.
Background
The 1140V permanent magnet motor for the main drive of the belt conveyor for the coal mine is gradually popularized and used, and is mainly used under the coal mine, the underground environment of the coal mine is severe, and faults such as low insulation resistance of a motor winding, grounding and the like are often caused by humidity, condensed water, periodic cleaning of the motor and the like; the normal operation of coal mining production is influenced, and great economic loss is directly caused to enterprises. Therefore, users put forward the waterproof function requirement on the permanent magnet motor winding used on site, and motor manufacturing enterprises need to further improve the winding insulation structure to meet the use requirement of site working conditions. 2013.12.04, the patent discloses a scattered winding stator insulation mechanism of a large permanent magnet wind-driven generator, belonging to the field of motors and solving the problems of weak anti-corona capability and poor insulation performance in the prior art, wherein the patent discloses a scattered winding stator insulation mechanism of a large permanent magnet wind-driven generator with the publication number of CN201210165049.3, and the name of the scattered winding stator insulation mechanism is that: the winding comprises a slot wedge, slot insulation, a slot bottom filler strip, middle insulation and a loose wire winding, wherein an end insulation assembly comprises an end interphase insulation piece, end insulation, a binding rope, a soft end hoop and a winding end sealing piece, so that the purposes of corona prevention and high insulation performance are achieved. The utility model discloses all insulation treatment has been carried out to head of a meeting, collector ring and cable junction to simple structure, convenient for material collection, more outstanding than its waterproof performance, manufacturing process is more simple.
In the manufacturing process of the domestic permanent magnet motor at present, the following problems still exist:
1. the waterproof effect of the mining permanent magnet motor is poor.
2. The manufacturing process of the insulation structure is relatively complicated.
Based on the circumstances, the utility model provides a mining permanent-magnet machine winding insulation system can effectively solve above problem.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a mining permanent-magnet machine winding insulation system. The utility model discloses a mining permanent-magnet machine winding insulation structure is simple, and convenient for material collection adopts the mode that all carries out insulation treatment to winding, inslot, wiring department, has realized the purpose of the whole insulating nature reinforcing of winding structure. The VPI dip coating and the common dip coating are combined and complemented, so that the overall sealing effect is improved; the material of the insulation structure is mature, and the insulation structure is suitable for mass production; and the waterproof performance test method is simple to use and convenient to operate.
The utility model discloses a following technical scheme realizes:
the utility model provides a mining permanent magnet motor winding insulation structure, which comprises a coil and a stator core, and also comprises a main insulation, an in-groove insulation component and a wiring insulation component;
the main insulation is wrapped on the outer side of the winding;
the in-groove insulation assembly comprises a winding, a groove bottom filler strip, a groove insulation, an interlayer filler strip, an adjusting filler strip and a groove wedge; the winding is composed of a left winding and a right winding; the groove bottom filler strip is arranged at the upper end of the groove insulation; the slot is insulated on the outer side of the winding; the interlayer filler strip is arranged between the left winding and the right winding; the adjusting filler strip is arranged between the slot insulation and the slot wedge; the slot wedge is arranged at the lower end of the slot insulator;
the wiring insulation assembly comprises a parallel connection wiring insulation, a collector ring wiring insulation and a cable wiring insulation; the parallel head wiring is arranged at a high-low difference neutral air gap generated when the small parallel head and the long parallel head are in parallel joint in an insulating way; the collector ring wiring is arranged at the irregular connection position of the lead and the collector ring in an insulated manner; the cable wiring is insulated at the joint of the cable and the collector ring;
thick felts are filled at coil joints in the parallel connection insulation, the collector ring connection insulation and the cable connection insulation; the coil junction parcel has three kinds of insulating layers, and the department that is close to the coil is the first insulating layer, is second insulating layer and third insulating layer respectively outward in proper order.
The utility model discloses a mining permanent-magnet machine winding insulation structure is simple, and convenient for material collection adopts the mode that all carries out insulation treatment to winding, inslot, wiring department, has realized the purpose of the whole insulating nature reinforcing of winding structure. The VPI dip coating and the common dip coating are combined and complemented, so that the overall sealing effect is improved; the material of the insulation structure is mature, and the insulation structure is suitable for mass production; and the waterproof performance inspection method is simple to use and convenient to operate.
Preferably, the main insulation layer is formed by two layers of polyimide films with the specification of 0.12 × 25 and less adhesive tapes.
Preferably, the winding is obtained by winding a self-adhesive single glass fiber wrapped polyimide film wrapped sintered copper flat wire with a temperature resistance index of 180 ℃.
Preferably, the groove bottom filler strip, the interlayer filler strip and the groove wedge are 3248 epoxy glass cloth laminated plates.
Preferably, the groove insulation is a polyimide film polyaramide fiber paper flexible composite material with the specification of 0.3mm thickness.
Preferably, the conditioning pad is a 1mm thick 7470 thermally expandable fiberglass plate.
Preferably, the first insulating layer is 1 layer of silicon rubber self-adhesive tape with the specification of 0.4 × 25 mm.
Preferably, the second insulating layer is a three-in-one mica powder tape with 3 layers and the specification of 0.14 multiplied by 25 mm.
Preferably, the third insulating layer is 1 layer of polyester glass shrinkage tape.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
the utility model discloses a mining permanent-magnet machine winding insulation structure is simple, and convenient for material collection adopts the mode that all carries out insulation treatment to winding, inslot, wiring department, has realized the purpose of the whole insulating nature reinforcing of winding structure. Its specific advantage has:
1. the polyimide film is adopted to wrap and sinter the copper flat wire, so that the displacement of an insulating layer caused by the influence of winding tension on the copper flat wire can be reduced, the insulating sealing of the copper flat wire is ensured, and the sealing reliability of a winding is established;
2. the silicon rubber adhesive tape and the felt are adopted to butt the welding position of the wire and carry out sealing treatment, so that the insulativity of the wire connecting position is improved;
3. the VPI dip coating and the common dip coating are combined and complemented for 2 times, so that the overall sealing effect is improved;
4. the waterproof winding is mature in structural material, convenient to obtain materials, not limited and suitable for batch production;
5. the waterproof winding insulation structure and the waterproof detection method are simple and practical in process and convenient to operate.
Drawings
FIG. 1 is a schematic diagram of the structure inside the tank of the present invention;
fig. 2 is a schematic diagram of a winding cross-sectional structure of the present invention;
fig. 3 is a schematic diagram of a junction structure of the end portion of the slip ring according to the present invention;
FIG. 4 is a schematic view of the enlarged structure of the parallel connection insulation part of the present invention;
FIG. 5 is an enlarged view of the insulating part of the collector ring wiring of the present invention;
FIG. 6 is a schematic view of the cable connection insulation structure of the present invention;
fig. 7 is the structural diagram of the coil junction of the present invention with insulated parallel connection, insulated bus ring connection and insulated cable connection.
In the figure: 1-main insulation; 2-winding; 21-left winding; 22-right winding; 3-groove bottom filler strip; 4-groove insulation; 5-interlayer padding strips; 6-adjusting the cushion strip; 7-a slot wedge; 8-parallel connection and insulation; 81-small merging; 82-long head; 9-bus ring wiring insulation; 91-a lead; 92-a slip ring; 10-cable connection insulation; 101-a cable; 11-thick felt; 12-a first insulating layer; 13-a second insulating layer; 14-a third insulating layer; 15-a coil; 16-stator core.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the following description of the preferred embodiments of the present invention is given with reference to the accompanying examples, but it should be understood that the drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.
Example 1:
as shown in fig. 1 to 4, a winding insulation structure of a permanent magnet motor for mining is provided, which comprises a coil 15 and a stator core 16, and further comprises a main insulation 1, an in-slot insulation assembly and a wiring insulation assembly;
the main insulation 1 is wrapped on the outer side of the winding 2;
the in-slot insulation assembly comprises a winding 2, a slot bottom filler strip 3, a slot insulation 4, an interlayer filler strip 5, an adjusting filler strip 6 and a slot wedge 7; the winding 2 consists of a left winding 21 and a right winding 22; the groove bottom filler strip 3 is arranged at the upper end of the groove insulation 4; the slot insulation 4 is arranged on the outer side of the winding 2; the interlayer filler strip 5 is arranged between the left winding 21 and the right winding 22; the adjusting filler strip 6 is arranged between the slot insulation 4 and the slot wedge 7; the slot wedge 7 is arranged at the lower end of the slot insulation 4;
the wiring insulation assembly comprises a parallel connection wiring insulation 8, a collector ring wiring insulation 9 and a cable wiring insulation 10; the parallel connection wire is arranged at a neutral air gap with a height difference generated when the small parallel head 81 and the long parallel head 82 are in parallel lap joint in an insulating way; the collector ring wiring is arranged at the irregular connection position of the lead wire 91 and the collector ring 92 in an insulating way; the cable wiring is arranged at the joint of the cable 101 and the collector ring 92 in an insulating manner;
The above technical solutions are all understandable to those skilled in the art.
Example 2:
as shown in fig. 1 to 4, a winding insulation structure of a permanent magnet motor for mining is provided, which comprises a coil 15 and a stator core 16, and further comprises a main insulation 1, an in-slot insulation assembly and a wiring insulation assembly;
the main insulation 1 is wrapped on the outer side of the winding 2;
the in-slot insulation assembly comprises a winding 2, a slot bottom filler strip 3, a slot insulation 4, an interlayer filler strip 5, an adjusting filler strip 6 and a slot wedge 7; the winding 2 consists of a left winding 21 and a right winding 22; the groove bottom filler strip 3 is arranged at the upper end of the groove insulation 4; the slot insulation 4 is arranged on the outer side of the winding 2; the interlayer filler strip 5 is arranged between the left winding 21 and the right winding 22; the adjusting filler strip 6 is arranged between the slot insulation 4 and the slot wedge 7; the slot wedge 7 is arranged at the lower end of the slot insulation 4;
the wiring insulation assembly comprises a parallel connection wiring insulation 8, a collector ring wiring insulation 9 and a cable wiring insulation 10; the parallel connection wire is arranged at a neutral air gap with a height difference generated when the small parallel head 81 and the long parallel head 82 are in parallel lap joint in an insulating way; the collector ring wiring is arranged at the irregular connection position of the lead wire 91 and the collector ring 92 in an insulating way; the cable wiring is arranged at the joint of the cable 101 and the collector ring 92 in an insulating manner;
Further, in another embodiment, the main insulator 1 is formed by two layers of polyimide films with a specification of 0.12 × 25 and less adhesive tapes.
Further, in another embodiment, the winding 2 is obtained by winding a self-adhesive single glass fiber wrapped polyimide film wrapped sintered copper flat wire with a temperature resistance index of 180 ℃.
The polyimide film is adopted to wrap and sinter the copper flat wire, so that the displacement of an insulating layer caused by the influence of winding tension on the copper flat wire can be reduced, the insulating sealing performance of the copper flat wire is ensured, and the sealing reliability of a winding is established.
Further, in another embodiment, the channel bottom battens 3, interlayer battens 5, and channel wedges 7 are 3248 epoxy glass cloth laminates.
3248 the epoxy glass cloth laminated board has high mechanical strength at high temperature and good electrical performance stability at high humidity, so that the epoxy glass cloth laminated board still has stable electrical performance in a humid environment, thereby achieving the waterproof effect.
Further, in another embodiment, the slot insulator 4 is a polyimide film polyaramid fiber paper flexible composite material with a gauge thickness of 0.3 mm.
The polyimide film polyaramide fiber paper soft composite material with the thickness of 0.3mm is formed by sandwiching a polyimide film between two layers of polyaramide fiber paper and compounding the polyimide film by using a proper adhesive, has high temperature resistance grade, is H-grade (180 ℃), can work at 180 ℃ for a long time, has good electrical performance, and meets the requirements of electrical strength and high temperature resistance of a motor.
Further, in another embodiment, the adjustment furring strips 6 are 1mm thick 7470 thermally expanded glass fiber sheets.
The temperature resistant grade of the 7470 thermal expansion glass fiber board with the thickness of 1mm is H grade (180 ℃), and the glass fiber board has the characteristics of high mechanical strength and excellent dielectric property, and can meet the requirements of the utility model on electrical strength and high temperature resistance.
Further, in another embodiment, the first insulating layer 12 is 1 layer of 0.4 × 25mm silicon rubber self-adhesive tape.
The silicone rubber of the type 2451 with the specification of 0.4 multiplied by 25mm has good sealing performance, has the characteristics of high temperature resistance and good waterproof performance, and can better ensure the sealing waterproof performance of the coil connection part by wrapping 1 layer of the material.
Further, in another embodiment, the second insulating layer 13 is 3 layers of three-in-one mica powder tape with a specification of 0.14 × 25 mm.
The specification is 0.14 by 25 mm's model 5446-1 trinity powder mica tape, and it has good compliance, and thickness is even, and dielectric strength is high, characteristics that mechanical properties is good, uses the electrical insulation that this material can guarantee the coil junction, and 3 layers of package can be better promote the electrical insulation of coil junction to promote waterproof effect.
Further, in another embodiment, the third insulating layer 14 is a 1-layer polyester glass shrink tape.
The model 2845 polyester-glass shrinkage tape has certain heat resistance, insulativity and heat shrinkability, and mainly plays roles in binding and protecting when used.
The above technical solutions are all understandable to those skilled in the art.
The utility model discloses a theory of operation of an embodiment as follows:
winding a polyimide film insulation copper flat wire with special requirements into a runway type coil, then performing hot-pressing, gelling, fixing and forming on the wound coil, wrapping, waterproofing and insulating, embedding the coil after the coil is wrapped with waterproofing and insulating, placing a groove bottom gasket strip in a rectangular groove before embedding the coil, inserting the groove into the coil for insulation, embedding the two ends of the formed coil into the groove with the same groove outlet positions, placing the interlayer gasket strip in close contact with the linear part of the coil into the groove, then placing another coil, buckling the groove for insulation, performing gap adjustment by using an adjustment gasket strip according to the tightness of height gap, and driving the adjusted coil into a groove wedge.
During wiring, the collector ring is fixed, the coil lead is bent and welded and fixed on the collector ring, the collector ring is bottomed with a silicon rubber self-adhesive tape with good waterproof sealing performance, and the mesocolloid mica tape is wrapped outside the collector ring.
And finally, carrying out VPI dip coating and ordinary dip coating on the whole winding, rotationally baking to finally form a whole finished stator winding, and then carrying out waterproof inspection in the following manner: and (3) at the room temperature of 25 +/-5 ℃, hanging the lead end of the stator winding upwards into the water immersion tank, keeping the stator winding horizontal and stable in the water immersion tank, enabling the water level in the water immersion tank to submerge the collector ring of the stator winding and keep for 2 hours, measuring the insulation resistance by using a CA6549 insulation resistance tester for 1 minute, and judging that the inspection result is qualified if the insulation resistance is more than 50M omega.
According to the description and drawings of the present invention, those skilled in the art can easily manufacture or use the aluminum bottle forming system of the present invention, and can produce the positive effects described in the present invention.
Unless otherwise specified, in the present invention, if the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, the terms describing orientation or positional relationship in the present invention are used for illustrative purposes only, and should not be construed as limiting the present patent, specific meanings of the above terms can be understood by those of ordinary skill in the art in light of the specific circumstances in conjunction with the accompanying drawings.
Unless expressly stated or limited otherwise, the terms "disposed," "connected," and "connected" are used broadly and encompass both fixed and removable connections, or integral connections; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The above is only the preferred embodiment of the present invention, not to the limitation of the present invention in any form, all the technical matters of the present invention all fall into the protection scope of the present invention to any simple modification and equivalent change of the above embodiments.
Claims (9)
1. The utility model provides a mining permanent-magnet machine winding insulation system, includes coil (15) and stator core (16), its characterized in that: the insulation structure comprises a main insulation (1), an in-groove insulation assembly and a wiring insulation assembly;
the main insulation (1) is wrapped on the outer side of the winding (2);
the in-groove insulation assembly comprises a winding (2), a groove bottom filler strip (3), a groove insulation (4), an interlayer filler strip (5), an adjusting filler strip (6) and a groove wedge (7); the winding (2) is composed of a left winding (21) and a right winding (22); the groove bottom filler strip (3) is arranged at the upper end of the groove insulation (4); the slot insulation (4) is arranged on the outer side of the winding (2); the interlayer filler strip (5) is arranged between the left winding (21) and the right winding (22); the adjusting filler strip (6) is arranged between the slot insulation (4) and the slot wedge (7); the slot wedge (7) is arranged at the lower end of the slot insulation (4);
the wiring insulation assembly comprises a parallel connection wiring insulation (8), a collector ring wiring insulation (9) and a cable wiring insulation (10); the parallel connection terminal is arranged at a high-low difference neutral air gap generated when the small parallel head (81) and the long parallel head (82) are in parallel lap joint in an insulating way; the collector ring wiring is arranged at the irregular connection position of the lead (91) and the collector ring (92) in an insulated manner; the cable wiring is insulated at the joint of the cable (101) and the collector ring (92);
thick felts (11) are filled at the joints of the coils (15) in the parallel connection insulation (8), the collector ring connection insulation (9) and the cable connection insulation (10); the connection part of the coil (15) is wrapped by three insulating layers, a first insulating layer (12) is arranged at the position close to the coil (15), and a second insulating layer (13) and a third insulating layer (14) are sequentially arranged outwards respectively.
2. The winding insulation structure of the mining permanent magnet motor according to claim 1, characterized in that: the main insulation (1) is composed of two layers of polyimide films with the specification of 0.12 multiplied by 25 and less adhesive tapes.
3. The winding insulation structure of the mining permanent magnet motor according to claim 1, characterized in that: the winding (2) is obtained by winding a self-adhesive single glass fiber wrapped double polyimide film wrapped sintered copper flat wire with a temperature resistance index of 180 ℃.
4. The winding insulation structure of the mining permanent magnet motor according to claim 1, characterized in that: the groove bottom filler strip (3), the interlayer filler strip (5) and the groove wedge (7) are 3248 epoxy glass cloth laminated boards.
5. The winding insulation structure of the mining permanent magnet motor according to claim 1, characterized in that: the groove insulation (4) is a polyimide film polyaramide fiber paper soft composite material with the specification and the thickness of 0.3 mm.
6. The winding insulation structure of the mining permanent magnet motor according to claim 1, characterized in that: the adjusting filler strip (6) is a 7470 thermal expansion glass fiber plate with the thickness of 1 mm.
7. The winding insulation structure of the mining permanent magnet motor according to claim 1, characterized in that: the first insulating layer (12) is 1 layer of silicon rubber self-adhesive tape with the specification of 0.4 multiplied by 25 mm.
8. The winding insulation structure of the mining permanent magnet motor according to claim 1, characterized in that: the second insulating layer (13) is a three-in-one mica powder tape with 3 layers and the specification of 0.14 multiplied by 25 mm.
9. The winding insulation structure of the mining permanent magnet motor according to claim 1, characterized in that: the third insulating layer (14) is a 1-layer polyester glass shrinkage band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020863367.7U CN212381012U (en) | 2020-05-21 | 2020-05-21 | Mining permanent magnet motor winding insulation structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020863367.7U CN212381012U (en) | 2020-05-21 | 2020-05-21 | Mining permanent magnet motor winding insulation structure |
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| Publication Number | Publication Date |
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| CN212381012U true CN212381012U (en) | 2021-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020863367.7U Active CN212381012U (en) | 2020-05-21 | 2020-05-21 | Mining permanent magnet motor winding insulation structure |
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| CN (1) | CN212381012U (en) |
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