CN101984543B - Insulating production process method of large alternating current machine stator core stretching screw - Google Patents
Insulating production process method of large alternating current machine stator core stretching screw Download PDFInfo
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- CN101984543B CN101984543B CN2010105871123A CN201010587112A CN101984543B CN 101984543 B CN101984543 B CN 101984543B CN 2010105871123 A CN2010105871123 A CN 2010105871123A CN 201010587112 A CN201010587112 A CN 201010587112A CN 101984543 B CN101984543 B CN 101984543B
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Abstract
The invention relates to an insulating production process method of a large alternating current machine stator core stretching screw. Insulation treatment is carried out between the stretching screw and an end plate of a stamped steel so as to guarantee the reliability of insulation. The insulating strength among the stretching screw, the end plate and the stamped steel can be effectively protected by using an insulating structure. The insulating process method of a stator core stretching screw comprises the steps of strengthening the mechanical strength of an insulating material; wrapping nickel hydrazine nitrate (NHN) composite foil with a high mechanical strength on both ends of the screw, wherein the diameter of the polish rod part in the middle of the screw is less than the major diameter of threads on both ends; sheathing a glass fiber sleeve with a low mechanical strength, with the threaded area on both ends bearing extrusion force; and tightly wrapping both ends of the sleeve in a condition that the sleeve is stretched. In order to avoid reduction of insulating resistance in the production process, a bakelite shim is arranged after being dipped by paint.
Description
Technical field
The present invention relates to a kind of electric machine stator iron insulation process for making, specifically refer to large ac machines stator core stretching screw insulating process technical method; This process can be protected the dielectric strength between stretching screw and end plate, the punching effectively, and easy to assembly, changes easily, and is economical and practical, be particularly useful for various large ac machines unshakable in one's determination draw the screw rod insulation, the invention still further relates to a kind of anti-rotation frock.
Background technology
Large ac machines, stator core all adopt the segmental punching closed assembly to form, and in order to guarantee the globality behind the closed assembly, all segmental punchings all adopt stretching screw from punching yoke portion that punching is fastening.If but not insulation reliably between screw rod and the punching will form the loop between screw rod and punching, under alternating flux, produce eddy current.Electric machine frequency is high more, and eddy current is serious more, in the wind power generator of straight magnetic structure, requires insulation resistance between stretching screw and the punching >=250M Ω.
At present; Adopt glass fibre sleeve and bakelite pad as insulating barrier on the insulation system; Because the screw-down torque of stretching screw big (M12 screw rod screw-down torque reaches 115Nm), screw rod has rotation in the rundown process, squeezes after being everlasting and tightening in thread, punching, end plate aperture and hinders insulating barrier; Causing insulation resistance is 0 phenomenon, therefore necessary this is further improved.
Summary of the invention
The objective of the invention is to; Unreliable in order to overcome between existing large ac machines stator core stretching screw and the punching insulation resistance; A kind of new insulating process technology is provided, guarantees the reliable large ac machines stator core stretching screw insulating process technical method of insulation.
In order to realize goal of the invention of the present invention, the technical scheme of being taked is:
A kind of large ac machines stator core stretching screw insulation process for making for the reliability that guarantees to insulate, carries out insulation processing between stretching screw and punching end plate.Protect the dielectric strength between stretching screw and end plate, the punching effectively through a kind of insulation system.The stator core stretching screw insulation process that is adopted comprises the steps:
1. adopt the NHN composite insulating foil of thick 0.24mm.At first composite insulating foil is cut into size 88 * 60 rectangular pieces.
2. one of screw rod is coated joint sealant in the fixed position, and nut is screwed into, and is screwed to nut and stops apart from screw rod end face 6 ± 0.5mm position.
In the position of pressing close to the nut place earlier with the wrapped screw rod of polyimide film adhesive tape 1 time; In the screw rod other end, apart from screw rod end face 13-14mm place wrapped 1 time with the polyimide film adhesive tape.
4. near wrapped 1 composite insulating foil in the position of nut, require composite insulating foil and nut spacing 1mm, adopt 1/2 stacked package that composite membrane is packed tightly with the polyimide film adhesive tape, 1 flat shim of packing into is adjacent to nut.From apart from wrapped 1 composite membrane of end face 13-14mm, adopt 1/2 stacked package that composite membrane is packed tightly with the polyimide film adhesive tape in the screw rod other end equally.The screw rod interlude still is an insulating sleeve, and under the sleeve pipe extended state, packs tightly the sleeve pipe two ends with adhesive tape 1/3 stacked package.
5. end plate is put into lamination completion, on the iron core that tooth support has installed, guarantee each hole alignment, require position, hole, everywhere all can insert with alignment pin with alignment pin insertion end plate hole, tooth pressure plate hole, punching hole.
6. install.The position, hole of assembling is extracted alignment pin out, and the insulation spacer of upper end is put into the end plate counterbore, and the insulation spacer fillet surface down, draws screw rod to insert in the hole; The insulation spacer of lower end is put into the support counterbore, require the insulation spacer fillet surface up, put into flat shim again, the nut screw thread of lower end is screwed on the screw rod after coating happy safe glue.
7. beat torsion.Rotate in the torsion in order to prevent that screw rod from beating, adopt anti-rotating tooling to be screwed in the screw rod upper end, pull frock handle anti-rotation with hand, and beat torsion to 115Nm in the screw rod lower end.Take off anti-rotating tooling afterwards, beat torsion to 115Nm in the screw rod upper end again, screw rod has rotation when beating torsion like the upper end, then anti-rotating tooling is screwed into screw rod lower end anti-rotation.Operation is wanted steadily when beating torsion.
8. inspection insulation resistance: measure with numerical megger 500V gear, time 15-20 second is more than insulation resistance 250 megaohms.
In manufacture craft, to note following some:
1. the mechanical strength of reinforced insulation material.At stretching screw two ends and thread, end plate, the high NHN composite insulating foil of punching aperture contact position outsourcing mechanical strength; The polished rod section diameter is littler than two ends major diameter of thread in the middle of the stretching screw; Put the glass fibre sleeve of bad mechanical strength, extruding force is born by the two ends threaded area.
2. in order to guarantee that the stretching screw that is surrounded by composite insulating foil and glass fibre sleeve can pack into, take out.Adopt the polyimide film adhesive tape composite insulating foil to be packed tightly, and under the sleeve pipe extended state, sleeve pipe two is packed tightly with the stacked package mode.
3. make moist and cause insulation resistance to descend in order to solve in the production process material, the bakelite pad is carried out installing behind the dipping lacquer.
4. to rotate in the stretching screw rundown process in order preventing, insulation to be caused damage by friction, designed and produced the anti-rotation frock.Tighten Shi Yitou and tighten with spanner, the other end prevents that with anti-rotating tooling stretching screw from rotating, and frock making is easy to use.
For prevent the bakelite pad in the nut screwing clamping by pressure break, change the iron gasket above the bakelite pad into special-purpose medium carbon steel packing ring that thickening strengthens by the standard plain washer.
6. in order to reduce stretching screw and to tighten, to the extruding of insulating material, alignment pin is inserted in adjacent stretching screw hole, the left and right sides in the assembling, guarantees that end plate bore aligns with the punching hole.
The invention has the advantages that: guarantee insulation property through reliable insulation system and assembly method between stretching screw and the punching end plate.This insulation system can be protected the dielectric strength between stretching screw and end plate, the punching effectively, and easy to assembly, changes easily, and is economical and practical, is particularly useful for the stretching screw insulation unshakable in one's determination of various large-scale compact alternating current machines.After adopting technique scheme, the stretching screw insulation resistance was once handed over inspection qualification rate 50% by the past, and had 30% to be 0, brought up to 100% and reached >=250M Ω.
Embodiment
Below in conjunction with embodiment the present invention is done further description.
A kind of large ac machines stator core stretching screw insulation process for making for the reliability that guarantees to insulate, carries out insulation processing between stretching screw and punching end plate.Protect the dielectric strength between stretching screw and end plate, the punching effectively through a kind of insulation system.The stator core stretching screw insulation process that is adopted comprises the steps:
1. adopt the NHN composite insulating foil of thick 0.24mm.At first composite insulating foil is cut into size 88 * 60 rectangular pieces.
2. one of stretching screw is coated joint sealant (as happy safe 243) in the fixed position, and nut is screwed into, and is screwed to nut and stops apart from stretching screw end face 6 ± 0.5mm position.
In the position of pressing close to the nut place earlier with the wrapped stretching screw of polyimide film adhesive tape 1 time; In the stretching screw other end, apart from stretching screw end face 13-14mm place wrapped 1 time with the polyimide film adhesive tape.
4. near wrapped 1 composite insulating foil in the position of nut, require composite insulating foil and nut spacing 1mm, adopt 1/2 stacked package that composite membrane is packed tightly with the polyimide film adhesive tape, 1 flat shim of packing into is adjacent to nut.From apart from wrapped 1 composite membrane of end face 13-14mm, adopt 1/2 stacked package that composite membrane is packed tightly with the polyimide film adhesive tape in the stretching screw other end equally.The stretching screw interlude still is an insulating sleeve, and under the sleeve pipe extended state, packs tightly the sleeve pipe two ends with 1/3 stacked package of polyimide film adhesive tape.
5. end plate is put into lamination completion, on the iron core that tooth support has installed, guarantee each hole alignment, require position, hole, everywhere all can insert with alignment pin with alignment pin insertion end plate hole, tooth pressure plate hole, punching hole.
6. install.The position, hole of assembling is extracted alignment pin out, and the insulation spacer of upper end is put into the end plate counterbore, and the insulation spacer fillet surface down, and stretching screw inserts in the hole; The insulation spacer of lower end is put into the support counterbore, require the insulation spacer fillet surface up, put into flat shim again, the nut screw thread of lower end is screwed on the stretching screw after coating happy safe glue.
7. beat torsion.Rotate in the torsion in order to prevent that stretching screw from beating, adopt the anti-rotation frock to be screwed in the stretching screw upper end, pull frock handle anti-rotation with hand, and beat torsion to 115Nm in the stretching screw lower end.Take off anti-rotating tooling afterwards, beat torsion to 115Nm in the stretching screw upper end again, stretching screw has rotation when beating torsion like the upper end, then anti-rotating tooling is screwed into stretching screw lower end anti-rotation.Operation is wanted steadily when beating torsion.
8. inspection insulation resistance: measure with numerical megger 500V gear, time 15-20 second is more than insulation resistance 250 megaohms.
In manufacture craft, to note following some:
1. the mechanical strength of reinforced insulation material.At stretching screw two ends and thread, end plate, the high NHN composite insulating foil of punching aperture contact position outsourcing mechanical strength; The polished rod section diameter is littler than two ends major diameter of thread in the middle of the stretching screw; Put the glass fibre sleeve of bad mechanical strength, extruding force is born by the two ends threaded area.
2. in order to guarantee that the stretching screw that is surrounded by composite insulating foil and glass fibre sleeve can pack into, take out.Adopt the polyimide film adhesive tape composite insulating foil to be packed tightly, and under the sleeve pipe extended state, sleeve pipe two is packed tightly with the stacked package mode.
3. make moist and cause insulation resistance to descend in order to solve in the production process material, the bakelite pad is carried out installing behind the dipping lacquer.
4. to rotate in the stretching screw rundown process in order preventing, insulation to be caused damage by friction, designed and produced the anti-rotation frock.Tighten Shi Yitou and tighten with spanner, the other end prevents that with anti-rotating tooling stretching screw from rotating, and frock making is easy to use.
For prevent the bakelite pad in the nut screwing clamping by pressure break, change the iron gasket above the bakelite pad into special-purpose medium carbon steel packing ring that thickening strengthens by the standard plain washer.
6. in order to reduce stretching screw and to tighten, to the extruding of insulating material, alignment pin is inserted in adjacent stretching screw hole, the left and right sides in the assembling, guarantees that end plate bore aligns with the punching hole.
The invention has the advantages that: after adopting technique scheme, the stretching screw insulation resistance was once handed over inspection qualification rate 50% by the past, and had 30% to be 0, brought up to 100% and reached >=250M Ω.
Claims (7)
1. large ac machines stator core stretching screw insulation process for making, it is characterized in that: for the reliability that guarantees to insulate, the stator core stretching screw insulation process that is adopted comprises the steps:
1) the NHN composite insulating foil of the thick 0.24mm of employing;
At first composite insulating foil is cut into size 88 * 60 rectangular pieces;
2) one of screw rod is coated joint sealant in the fixed position, and nut is screwed into, and is screwed to nut and stops apart from screw rod end face 6 ± 0.5mm position;
3) in the position of pressing close to the nut place earlier with the wrapped screw rod of polyimide film adhesive tape 1 time; In the screw rod other end, apart from screw rod end face 13-14mm place wrapped 1 time with the polyimide film adhesive tape;
4) near wrapped 1 composite insulating foil in the position of nut, require composite insulating foil and nut spacing 1mm, adopt 1/2 stacked package that composite insulating foil is packed tightly with the polyimide film adhesive tape, 1 flat shim of packing into is adjacent to nut; From apart from wrapped 1 composite insulating foil of end face 13-14mm, adopt 1/2 stacked package that composite insulating foil is packed tightly with the polyimide film adhesive tape in the screw rod other end equally;
5) end plate is put into lamination completion, on the iron core that tooth support has installed, guarantee each hole alignment, require position, hole, everywhere all can insert with alignment pin with alignment pin insertion end plate hole, tooth pressure plate hole, punching hole;
6) install: the position, hole that assemble is extracted alignment pin out, and the insulation spacer of upper end is put into the end plate counterbore, and the insulation spacer fillet surface down, draws screw rod to insert in the hole; The insulation spacer of lower end is put into the support counterbore, require the insulation spacer fillet surface up, put into flat shim again, the nut screw thread of lower end is screwed on the screw rod after coating fluid sealant;
7) beat torsion: rotate in the torsion in order to prevent that screw rod from beating, adopt anti-rotating tooling to be screwed in the screw rod upper end, pull frock handle anti-rotation with hand, and beat torsion to 115Nm in the screw rod lower end; Take off anti-rotating tooling afterwards, beat torsion to 115Nm in the screw rod upper end again, screw rod has rotation when beating torsion like the upper end, then anti-rotating tooling is screwed into screw rod lower end anti-rotation; Operation is wanted steadily when beating torsion;
8) inspection insulation resistance: with numerical megger 500V gear measurement, time 15-20 second is more than insulation resistance 250 megaohms.
2. large ac machines stator core stretching screw insulation process for making as claimed in claim 1; It is characterized in that: at stretching screw two ends and thread, end plate, the high NHN composite insulating foil of punching aperture contact position outsourcing mechanical strength; The polished rod section diameter is littler than two ends major diameter of thread in the middle of the stretching screw; Put the glass fibre sleeve of bad mechanical strength, extruding force is born by the two ends threaded area.
3. large ac machines stator core stretching screw insulation process for making as claimed in claim 1 is characterized in that: adopt 1/2 stacked package that composite insulating foil is packed tightly with the polyimide film adhesive tape, and under the sleeve pipe extended state, sleeve pipe two is packed tightly; The screw rod interlude still is an insulating sleeve, and under the sleeve pipe extended state, packs tightly the sleeve pipe two ends with adhesive tape 1/3 stacked package.
4. large ac machines stator core stretching screw insulation process for making as claimed in claim 1 is characterized in that: insulation spacer is carried out installing behind the dipping lacquer.
5. large ac machines stator core stretching screw insulation process for making as claimed in claim 1 is characterized in that: in order to prevent to rotate in the stretching screw rundown process, insulation is caused damage by friction; Tighten Shi Yitou and tighten with spanner, the other end prevents that with anti-rotating tooling stretching screw from rotating.
6. large ac machines stator core stretching screw as claimed in claim 1 insulation process for making is characterized in that: for prevent insulation spacer in the nut screwing clamping by pressure break, with the special-purpose medium carbon steel packing ring that adopts thickening to strengthen above the insulation spacer.
7. large ac machines stator core stretching screw insulation process for making as claimed in claim 1; It is characterized in that: when tightening in order to reduce stretching screw; To the extruding of insulation spacer, alignment pin is inserted in adjacent stretching screw hole, the left and right sides in the assembling, guarantees that end plate bore aligns with the punching hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105871123A CN101984543B (en) | 2010-12-14 | 2010-12-14 | Insulating production process method of large alternating current machine stator core stretching screw |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105871123A CN101984543B (en) | 2010-12-14 | 2010-12-14 | Insulating production process method of large alternating current machine stator core stretching screw |
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| Publication Number | Publication Date |
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| CN101984543A CN101984543A (en) | 2011-03-09 |
| CN101984543B true CN101984543B (en) | 2012-11-28 |
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| CN103825414A (en) * | 2014-03-04 | 2014-05-28 | 哈尔滨电机厂有限责任公司 | Method for manufacturing 1250 MW nuclear power half-speed turbogenerator stator through-core screw rods |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1870386A (en) * | 2005-05-24 | 2006-11-29 | 株式会社日立制作所 | Joint structure of electric wire and processing method, stator of rotary electric machine, method for manufacturing the same |
| CN101223683A (en) * | 2005-07-14 | 2008-07-16 | 丰田自动车株式会社 | Stator of alternating-current rotary electric machine and method of insulating stator winding of alternating-current rotary electric machine |
| CN100440687C (en) * | 2002-10-11 | 2008-12-03 | 三菱电机株式会社 | Stator of alternating-current generator for vehicle and manufacturing method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3561249B2 (en) * | 2001-09-17 | 2004-09-02 | 三菱電機株式会社 | Stator for AC generator and method of manufacturing the same |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100440687C (en) * | 2002-10-11 | 2008-12-03 | 三菱电机株式会社 | Stator of alternating-current generator for vehicle and manufacturing method thereof |
| CN1870386A (en) * | 2005-05-24 | 2006-11-29 | 株式会社日立制作所 | Joint structure of electric wire and processing method, stator of rotary electric machine, method for manufacturing the same |
| CN101223683A (en) * | 2005-07-14 | 2008-07-16 | 丰田自动车株式会社 | Stator of alternating-current rotary electric machine and method of insulating stator winding of alternating-current rotary electric machine |
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