CN114243315B - Rotor conducting rod structure for brushless steam turbine generator and preparation method thereof - Google Patents
Rotor conducting rod structure for brushless steam turbine generator and preparation method thereof Download PDFInfo
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- CN114243315B CN114243315B CN202111369214.2A CN202111369214A CN114243315B CN 114243315 B CN114243315 B CN 114243315B CN 202111369214 A CN202111369214 A CN 202111369214A CN 114243315 B CN114243315 B CN 114243315B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 238000007731 hot pressing Methods 0.000 claims description 27
- 238000009413 insulation Methods 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 16
- 229920001721 polyimide Polymers 0.000 claims description 16
- 239000003822 epoxy resin Substances 0.000 claims description 13
- 239000011521 glass Substances 0.000 claims description 13
- 229920000647 polyepoxide Polymers 0.000 claims description 13
- 125000006850 spacer group Chemical group 0.000 claims description 13
- 239000004744 fabric Substances 0.000 claims description 11
- 238000003825 pressing Methods 0.000 claims description 10
- 239000004593 Epoxy Substances 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 9
- 230000001680 brushing effect Effects 0.000 claims description 8
- 230000015556 catabolic process Effects 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 239000004519 grease Substances 0.000 claims description 3
- 238000003801 milling Methods 0.000 claims description 3
- 239000006082 mold release agent Substances 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 238000009966 trimming Methods 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims description 2
- 238000005553 drilling Methods 0.000 claims 1
- 230000007547 defect Effects 0.000 description 3
- 238000004804 winding Methods 0.000 description 2
- 238000005253 cladding Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R39/00—Rotary current collectors, distributors or interrupters
- H01R39/02—Details for dynamo electric machines
- H01R39/36—Connections of cable or wire to brush
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/16—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for manufacturing contact members, e.g. by punching and by bending
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Manufacture Of Motors, Generators (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
The invention relates to a rotor conducting rod structure for a brushless steam turbine generator and a preparation method thereof, and belongs to the technical field of brushless steam turbine generators. Has the characteristics of compact structure, no gap and good integrity of the insulating structure. Solves the problem of dislocation of the holes for the lead wires and avoids the phenomenon that the lead wires cannot be assembled.
Description
Technical Field
The invention relates to the technical field of brushless steam turbine generators, in particular to a rotor conducting rod structure for a brushless steam turbine generator and a preparation method thereof.
Background
The exciting current of the brushless turbogenerator is provided by a brushless exciter, and the exciting current is loaded by forming a positive current loop and a negative current loop through two conductive rods in the rotor component. The rotor conducting rod is a key component for conducting exciting current of the brushless steam turbine generator.
In the prior art, a rotor conducting rod is generally plugged by an insulating tube wedge-shaped plate to form an insulating structure, and the structure has three problems in practical application:
1. gaps exist between the conducting rod and the insulating tube and between the conducting rod and the wedge-shaped plate, and the integrity of the insulating structure is poor.
2. The manufacturing method of the structure has multiple working procedures, the conducting rod and the wedge-shaped plate are installed into the insulating tube step by step, and dislocation can occur between the counter bore on the insulating tube and the installation lead screw hole arranged on the conducting rod after the insulating tube is assembled.
3. When the linearity of the inner hole of the insulating tube is poor, the problem that the conducting rod and the wedge-shaped plate cannot be assembled is caused, and the quality is difficult to control.
Disclosure of Invention
The invention mainly solves the defects of large gap, poor integrity of an insulating structure, high assembly difficulty and easy dislocation in the prior art, and provides a rotor conducting rod structure for a brushless steam turbine generator and a preparation method thereof, and the rotor conducting rod structure has the characteristics of compact structure, no gap and good integrity of the insulating structure. Solves the problem of dislocation of the holes for the lead wires and avoids the phenomenon that the lead wires cannot be assembled.
The technical problems of the invention are mainly solved by the following technical proposal:
the utility model provides a brushless turbo generator is with rotor conducting rod structure, includes first conducting rod and second conducting rod, first conducting rod, second conducting rod transversal take the semicircle form structure, first conducting rod and second conducting rod on be crisscross symmetric distribution, first conducting rod and second conducting rod between be equipped with the interval insulation board, first conducting rod, second conducting rod one end be equipped with first conducting rod, second conducting rod mutually insert the insulating pad of being connected, first conducting rod, second conducting rod on be equipped with a plurality of location insulating pins that run through first conducting rod, second conducting rod, interval insulation board, first conducting rod, second conducting rod on respectively be equipped with a plurality of lead screw holes that are located between two location insulating pins and between location insulating pin and insulating pad, first conducting rod, second conducting rod periphery be equipped with and extend to insulating pad and with first conducting rod, second conducting rod, insulating pad winding epoxy glass blank high strength cladding.
Preferably, the periphery of the first conductive rod and the periphery of the second conductive rod are respectively provided with polyimide film belts which are respectively sleeved with the first conductive rod and the second conductive rod in a wrapping way, and epoxy resin is arranged between the first conductive rod and the polyimide film belts, between the second conductive rod and the polyimide film belts, between the insulating cushion block and the first conductive rod, between the insulating cushion block and the second conductive rod, and between the insulating cushion block and the interval insulating plate.
Preferably, the arc end surfaces of the first conductive rod and the second conductive rod are respectively provided with a plurality of counter bores communicated with the lead screw holes.
Preferably, one end of the insulating cushion block is flush with the first conductive rod, the other end of the insulating cushion block is flush with the second conductive rod, and the insulating cushion block is a glass cloth rod with steps; the positioning insulating pins are made of epoxy glass cloth rods, and the number of the positioning insulating pins is 2.
A preparation method of a rotor conducting rod structure for a brushless steam turbine generator comprises the following operation steps:
the first step: the ends of the first conductive rod and the second conductive rod are arranged in a staggered mode, the first conductive rod and the second conductive rod are fastened by a temporary binding belt, and lead screw holes are drilled in the first conductive rod and the second conductive rod, and the two positions are drilled through.
And a second step of: removing the temporary binding belt, arranging the end parts of the first conductive rod and the second conductive rod in a staggered manner, placing the interval insulating plate between the first conductive rod and the second conductive rod, and installing the insulating cushion block to enable one end of the insulating cushion block to be flush with the first conductive rod and the other end to be flush with the second conductive rod.
And a third step of: and the first conductive rod, the second conductive rod and the interval insulating plate are integrally fastened by using the temporary binding belt, two pin holes are drilled on the first conductive rod, the second conductive rod and the interval insulating plate, and the pin holes are drilled through.
Fourth step: removing the temporary binding belt, brushing epoxy resin on the outer circle surfaces of the first conductive rod and the second conductive rod respectively, and after brushing the epoxy resin, respectively half-overlapping 1 polyimide film belt on the outer circles of the first conductive rod and the second conductive rod, wherein polyimide film belts are not covered at the positions of the lead thread holes and the pin holes.
Fifth step: two positioning insulating pins are arranged in pin holes of the first conductive rod, the second conductive rod and the interval insulating plate, and then four process screws are respectively arranged in lead screw holes of the first conductive rod and the second conductive rod.
Sixth step: and brushing epoxy resin on one end surfaces of the first conductive rod, the second conductive rod and the interval insulating plate, and inserting and firmly adhering the insulating cushion blocks to form an integral rotor conductive rod.
Seventh step: and wrapping the outer ring of the rotor conducting rod by using high-strength epoxy glass grey cloth, wrapping a plurality of layers, and finally wrapping a process compression belt.
Eighth step: and (3) coating a mold release agent silicone grease on the inner surface of the hot-pressing mold, putting the rotor conducting rod into the mold for clamping, and putting the hot-pressing mold into a heating furnace for curing and molding.
Ninth step: and (3) demoulding after molding, taking the rotor conducting rod out of the hot-pressing die, removing gumming, and trimming the insulating excircle.
Tenth step: turning an insulating excircle of a conducting rod, wherein the diameter size reaches the design requirement, and the tolerance is controlled to be +/-0.1 mm;
eleventh step: and taking out the process screw in the screw hole, and milling a counter bore at the thread hole of the lead on the insulating outer circle.
Preferably, the rotor conducting rod is fixed by adopting a butt-pressing mode of two semicircular pressing pipes of the hot pressing die, a plurality of fixed connecting blocks on two sides of the semicircular pressing pipes of the hot pressing die are fixed by adopting bolts and nuts, then the hot pressing die is placed into a heating furnace to be slowly heated to 135-165 ℃, the hot pressing die is taken out of the furnace after being preheated, the nuts and the bolts on the hot pressing die are screwed, then the hot pressing die is placed into the heating furnace to be heated to 200 ℃, and the temperature is kept for 2 hours, so that the rotor conducting rod is solidified and formed.
Preferably, the first conductive rod and the second conductive rod are respectively qualified after being subjected to 2000V alternating current withstand voltage test and breakdown is not carried out for 1 minute. The purpose is as follows: 1. judging whether the insulation structure has defects or not; 2. and judging the insulation electrical strength performance, namely the capability of the insulation to bear overvoltage.
Preferably, the insulation resistance between the first conductive rod and the second conductive rod is not less than 5MΩ, and the insulation resistance between the first conductive rod and the second conductive rod is not less than 5MΩ measured by 500V megameter.
Preferably, the rotor conducting rod is subjected to a 6000V alternating current withstand voltage test on the whole ground for 1 minute without breakdown. The purpose is as follows: 1. judging whether the insulation structure has defects or not; 2. and judging the insulation electrical strength performance, namely the capability of the insulation to bear overvoltage.
The invention can achieve the following effects:
compared with the prior art, the rotor conducting rod structure for the brushless steam turbine generator has the characteristics of compact structure, no gap and good integrity of an insulating structure. Solves the problem of dislocation of the holes for the lead wires and avoids the phenomenon that the lead wires cannot be assembled.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a cross-sectional structural cross-sectional view of the present invention.
Fig. 3 is a schematic top view of the hot press tooling of the present invention.
Fig. 4 is a structural cross-sectional view of the hot die tooling of the present invention.
Fig. 5 is a schematic structural view of a process screw of the present invention.
In the figure: the insulation board comprises a first conductive rod 1, a spacing insulation board 2, a second conductive rod 3, a lead screw hole 4, a counter bore 5, a polyimide film tape 6, epoxy resin 7, an insulation cushion block 8, high-strength epoxy glass grey cloth 9, a positioning insulation pin 10, a fixed connection block 11, a hot-press mold semicircular pressing pipe 12, a bolt 13, a nut 14 and a process screw 15.
Detailed Description
The technical scheme of the invention is further specifically described below through examples and with reference to the accompanying drawings.
Examples: as shown in fig. 1-5, a rotor conducting rod structure for a brushless steam turbine generator comprises a first conducting rod 1 and a second conducting rod 3, wherein the cross sections of the first conducting rod 1 and the second conducting rod 3 are semicircular structures, polyimide film strips 6 which are respectively sleeved with the first conducting rod 1 and the second conducting rod 3 in a wrapping mode are arranged on the periphery of the first conducting rod 1 and the periphery of the second conducting rod 3, and epoxy resin 7 is arranged between the first conducting rod 1 and the polyimide film strips 6, between the second conducting rod 3 and the polyimide film strips 6, between an insulating cushion block 8 and the first conducting rod 1, between the insulating cushion block 8 and the second conducting rod 3 and between the insulating cushion block 8 and the interval insulating plate 2. The first conductive rod 1 and the second conductive rod 3 are in staggered symmetrical distribution, an interval insulating plate 2 is arranged between the first conductive rod 1 and the second conductive rod 3, one end of the first conductive rod 1 and one end of the second conductive rod 3 are provided with insulating cushion blocks 8 which are connected with the first conductive rod 1 and the second conductive rod 3 in an inserting and embedding mode, one end of each insulating cushion block 8 is flush with the first conductive rod 1, the other end of each insulating cushion block is flush with the second conductive rod 3, and each insulating cushion block 8 is a glass cloth rod with steps. The first conductive rod 1 and the second conductive rod 3 are provided with 2 positioning insulating pins 10 penetrating through the first conductive rod 1, the second conductive rod 3 and the interval insulating plate 2, and the positioning insulating pins 10 are made of epoxy glass cloth rods. The first conductive rod 1 and the second conductive rod 3 are respectively provided with 2 lead screw holes 4 positioned between two positioning insulating pins 10 and between the positioning insulating pins 10 and an insulating cushion block 8, and the arc end face of the first conductive rod 1 and the arc end face of the second conductive rod 3 are respectively provided with 2 counter bores 5 communicated with the lead screw holes 4. The peripheries of the first conductive rod 1 and the second conductive rod 3 are provided with high-strength epoxy glass grey cloth 9 which extends to the insulating cushion block 8 and is wrapped with the first conductive rod 1, the second conductive rod 3 and the insulating cushion block 8 in a winding mode.
A preparation method of a rotor conducting rod structure for a brushless steam turbine generator comprises the following operation steps:
the first step: the ends of the first conductive rod 1 and the second conductive rod 3 are arranged in a staggered mode, the first conductive rod 1 and the second conductive rod 3 are fastened by a temporary binding belt, and lead screw holes 4 are drilled in the first conductive rod 1 and the second conductive rod 3, and the two parts are drilled through.
And a second step of: removing the temporary binding belt, arranging the end parts of the first conductive rod 1 and the second conductive rod 3 in a staggered manner, placing the interval insulating plate 2 between the first conductive rod 1 and the second conductive rod 3, and installing the insulating cushion block 8, so that one end of the insulating cushion block 8 is flush with the first conductive rod 1, and the other end is flush with the second conductive rod 3.
And a third step of: the first conductive rod 1, the second conductive rod 3 and the interval insulating plate 2 are integrally fastened by using a temporary binding belt, two pin holes are drilled on the first conductive rod 1, the second conductive rod 3 and the interval insulating plate 2, and the pin holes are drilled through.
Fourth step: removing the temporary binding belt, brushing epoxy resin 7 on the outer circle surfaces of the first conductive rod 1 and the second conductive rod 3 respectively, and after brushing the epoxy resin 7, respectively half-overlapping 1 layer of polyimide film belt 6 on the outer circles of the first conductive rod and the second conductive rod, wherein the polyimide film belt 6 is not covered at the positions of the lead thread holes 4 and the pin holes.
Fifth step: two positioning insulating pins 10 are fitted into the pin holes of the first conductive rod 1, the second conductive rod 3 and the spacer insulating plate 2, and then four process screws 15 are respectively fitted into the lead screw holes 4 of the first conductive rod 1 and the second conductive rod 3.
Sixth step: epoxy resin 7 is brushed on one end surfaces of the first conductive rod 1, the second conductive rod 3 and the interval insulating plate 2, and the insulating cushion block 8 is inserted and firmly adhered to form an integral rotor conductive rod.
Seventh step: and wrapping the outer ring of the rotor conducting rod by using high-strength epoxy glass gray cloth 9, wrapping 17 layers, and finally wrapping a process compression belt.
Eighth step: and (3) coating a mold release agent silicone grease on the inner surface of the hot-pressing mold, putting the rotor conducting rod into the mold for clamping, and putting the hot-pressing mold into a heating furnace for curing and molding.
The rotor conducting rod is fixed by adopting the opposite-pressing type of two hot-pressing mould semicircular pressing pipes 12, the bolts 13 and the nuts 14 are adopted to fix the 8 fixed connecting blocks 11 on the two sides of the hot-pressing mould semicircular pressing pipes 12, then the hot-pressing mould is placed into a heating furnace to slowly heat up to 135-165 ℃, the hot-pressing mould is taken out of the furnace after being preheated, the nuts 14 and the bolts 13 on the hot-pressing mould are screwed, then the hot-pressing mould is placed into the heating furnace to heat up to 200 ℃, the temperature is kept for 2 hours, and solidification forming is carried out.
Ninth step: demoulding after molding, taking the rotor conducting rod out of the hot-pressing die, removing the fluid adhesive, and trimming the insulating excircle;
tenth step: turning an insulating excircle of a conducting rod, wherein the diameter size reaches the design requirement, and the tolerance is controlled to be +/-0.1 mm;
eleventh step: and taking out the process screw 15 in the screw hole, and milling a counter bore 5 at the lead screw hole 4 on the insulating outer circle.
The first conductive rod 1 and the second conductive rod 3 are respectively qualified after being subjected to 2000V alternating current withstand voltage test and breakdown is avoided for 1 minute. And the insulation resistance between the first conductive rod 1 and the second conductive rod 3 is measured by using a 500V megameter, and the insulation resistance between the first conductive rod 1 and the second conductive rod 3 is not less than 5MΩ and is qualified. The whole rotor conducting rod is subjected to 6000V alternating current withstand voltage test to be qualified after no breakdown for 1 minute.
In summary, the rotor conducting rod structure for the brushless steam turbine generator and the preparation method thereof have the characteristics of compact structure, no gap and good integrity of an insulating structure. Solves the problem of dislocation of the holes for the lead wires and avoids the phenomenon that the lead wires cannot be assembled.
The above embodiments are merely examples of the present invention, but the present invention is not limited thereto, and any changes or modifications made by those skilled in the art are included in the scope of the present invention.
Claims (9)
1. A rotor conducting rod structure for a brushless steam turbine generator is characterized in that: including first conducting rod (1) and second conducting rod (3), first conducting rod (1), second conducting rod (3) transversal semicircle structure of personally submitting, first conducting rod (1) and second conducting rod (3) be the staggered symmetry distribution, first conducting rod (1) and second conducting rod (3) on be equipped with interval insulation board (2), first conducting rod (1), second conducting rod (3) one end be equipped with first conducting rod (1), second conducting rod (3) mutually insert insulating spacer (8) of being connected, first conducting rod (1), second conducting rod (3) on be equipped with a plurality of insulating spacer (10) that run through first conducting rod (1), second conducting rod (3), interval insulation board (2), first conducting rod (1), second conducting rod (3) on each be equipped with a plurality of insulating spacer (10) that are located between two insulating spacer (10) and insulating spacer (8), insulating spacer (8) and insulating spacer (8) are equipped with insulating spacer (4) and insulating spacer (8) are connected to first insulating spacer (1), insulating spacer (8) wire (4) and insulating glass (3) are equipped with insulating spacer (8).
2. The rotor bar structure for a brushless turbo generator according to claim 1, wherein: the periphery of the first conductive rod (1) and the periphery of the second conductive rod (3) are respectively provided with a polyimide film strip (6) which is wrapped and sleeved with the first conductive rod (1) and the second conductive rod (3), and epoxy resin (7) is arranged between the first conductive rod (1) and the polyimide film strip (6), between the second conductive rod (3) and the polyimide film strip (6), between the insulating cushion block (8) and the first conductive rod (1), between the insulating cushion block (8) and the second conductive rod (3), and between the insulating cushion block (8) and the interval insulating plate (2).
3. The rotor bar structure for a brushless turbo generator according to claim 1, wherein: the arc end surfaces of the first conductive rod (1) and the second conductive rod (3) are respectively provided with a plurality of counter bores (5) communicated with the lead screw holes (4).
4. The rotor bar structure for a brushless turbo generator according to claim 1, wherein: one end of the insulating cushion block (8) is flush with the first conductive rod (1), the other end of the insulating cushion block is flush with the second conductive rod (3), and the insulating cushion block (8) is a glass cloth rod with steps; the positioning insulating pins (10) are made of epoxy glass cloth rods, and the number of the positioning insulating pins is 2.
5. The preparation method of the rotor conducting rod structure for the brushless steam turbine generator is characterized by comprising the following operation steps:
the first step: arranging the end parts of the first conductive rod (1) and the second conductive rod (3) in a staggered manner, binding the first conductive rod (1) and the second conductive rod (3) by using a temporary binding belt, and drilling lead screw holes (4) on the first conductive rod (1) and the second conductive rod (3) at two positions;
and a second step of: removing the temporary binding belt, arranging the end parts of the first conductive rod (1) and the second conductive rod (3) in a staggered manner, placing the interval insulating plate (2) between the first conductive rod (1) and the second conductive rod (3), and installing the insulating cushion block (8) so that one end of the insulating cushion block (8) is flush with the first conductive rod (1) and the other end of the insulating cushion block is flush with the second conductive rod (3);
and a third step of: the first conductive rod (1), the second conductive rod (3) and the interval insulating plate (2) are integrally fastened by using a temporary binding belt, two pin holes are drilled on the first conductive rod (1), the second conductive rod (3) and the interval insulating plate (2) at the same time, and the pin holes are drilled through;
fourth step: removing the temporary binding belt, brushing epoxy resin (7) on the outer circle surfaces of the first conductive rod (1) and the second conductive rod (3), and half-overlapping 1 layer of polyimide film belt (6) on the outer circle of the first conductive rod and the outer circle of the second conductive rod after brushing the epoxy resin (7), wherein the polyimide film belt (6) is not covered at the positions of the lead screw holes (4) and the pin holes;
fifth step: two positioning insulating pins (10) are arranged in pin holes of the first conductive rod (1), the second conductive rod (3) and the interval insulating plate (2), and then four process screws (15) are respectively arranged in lead screw holes (4) of the first conductive rod (1) and the second conductive rod (3);
sixth step: brushing epoxy resin (7) on one end surfaces of the first conductive rod (1), the second conductive rod (3) and the interval insulating plate (2), and inserting and firmly adhering an insulating cushion block (8) to form an integral rotor conductive rod;
seventh step: wrapping the outer ring of the rotor conducting rod with high-strength epoxy glass grey cloth (9), wrapping a plurality of layers, and finally wrapping a process compression belt;
eighth step: coating a mold release agent silicone grease on the inner surface of a hot-pressing mold, putting a rotor conducting rod into the mold for clamping, and putting the hot-pressing mold into a heating furnace for curing and molding;
ninth step: demoulding after molding, taking the rotor conducting rod out of the hot-pressing die, removing the fluid adhesive, and trimming the insulating excircle;
tenth step: turning an insulating excircle of a conducting rod, wherein the diameter size reaches the design requirement, and the tolerance is controlled to be +/-0.1 mm;
eleventh step: and taking out the process screw (15) in the screw hole, and milling a counter bore (5) at the lead screw hole (4) on the insulating outer circle.
6. The method for manufacturing a rotor conductive rod structure for a brushless turbo generator according to claim 5, wherein:
the rotor conducting rod is fixed by adopting two hot-pressing mould semicircular pressing pipes (12) in opposite pressing mode, a plurality of fixed connecting blocks (11) on two sides of each hot-pressing mould semicircular pressing pipe (12) are fixed by adopting bolts (13) and nuts (14), then the hot-pressing mould is placed into a heating furnace to be slowly heated to 135-165 ℃, the hot-pressing mould is discharged after being preheated, the nuts (14) and the bolts (13) on the hot-pressing mould are screwed, and then the hot-pressing mould is placed into the heating furnace to be heated to 200 ℃, and is kept warm for 2 hours, so that the rotor conducting rod is cured and formed.
7. The method for manufacturing a rotor conductive rod structure for a brushless turbo generator according to claim 5, wherein: the first conductive rod (1) and the second conductive rod (3) are respectively qualified after being subjected to 2000V alternating current withstand voltage test and breakdown is not carried out for 1 minute.
8. The method for manufacturing a rotor conductive rod structure for a brushless turbo generator according to claim 5, wherein: the insulation resistance between the first conductive rod (1) and the second conductive rod (3) is not smaller than 5MΩ, and the insulation resistance between the first conductive rod (1) and the second conductive rod (3) is measured by using a 500V megameter, and the insulation resistance is not smaller than 5MΩ.
9. The method for manufacturing a rotor conductive rod structure for a brushless turbo generator according to claim 5, wherein: the whole rotor conducting rod is subjected to 6000V alternating current withstand voltage test to the ground, and no breakdown occurs in 1 minute.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111369214.2A CN114243315B (en) | 2021-11-18 | 2021-11-18 | Rotor conducting rod structure for brushless steam turbine generator and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111369214.2A CN114243315B (en) | 2021-11-18 | 2021-11-18 | Rotor conducting rod structure for brushless steam turbine generator and preparation method thereof |
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| CN114243315A CN114243315A (en) | 2022-03-25 |
| CN114243315B true CN114243315B (en) | 2024-01-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP2768120A1 (en) * | 2013-02-15 | 2014-08-20 | Alstom Technology Ltd | Rotor of an electric machine |
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|---|---|---|---|---|
| CN101299361A (en) * | 2008-06-30 | 2008-11-05 | 王若柏 | Compound insulation casing |
| CN101599667A (en) * | 2009-07-08 | 2009-12-09 | 山东齐鲁电机制造有限公司 | Lead assembling mechanism used for novel winding motor |
| CN102545449A (en) * | 2012-03-20 | 2012-07-04 | 中科盛创（青岛）电气有限公司 | Generator rotor winding leading-out wire structure |
| CN102611253A (en) * | 2012-03-29 | 2012-07-25 | 东方电气集团东方电机有限公司 | Flexible connecting device for generator rotor conducting rod |
| EP3048710A1 (en) * | 2015-01-20 | 2016-07-27 | GE Energy Power Conversion Technology Ltd | Magnetic mass for rotor, corresponding rotor, manufacturing method and electric machine |
| CN209374088U (en) * | 2019-03-18 | 2019-09-10 | 哈尔滨电机厂有限责任公司 | A kind of rotor of steam turbo generator conducting rod insulation system |
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| CN114243315A (en) | 2022-03-25 |
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