CN114243315A - 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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- CN114243315A CN114243315A CN202111369214.2A CN202111369214A CN114243315A CN 114243315 A CN114243315 A CN 114243315A CN 202111369214 A CN202111369214 A CN 202111369214A CN 114243315 A CN114243315 A CN 114243315A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 238000009413 insulation Methods 0.000 claims abstract description 27
- 239000004744 fabric Substances 0.000 claims abstract description 16
- 239000011521 glass Substances 0.000 claims abstract description 16
- 239000004593 Epoxy Substances 0.000 claims abstract description 13
- 238000004804 winding Methods 0.000 claims abstract description 4
- 238000007731 hot pressing Methods 0.000 claims description 30
- 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
- 229920000647 polyepoxide Polymers 0.000 claims description 13
- 238000003825 pressing Methods 0.000 claims description 10
- 230000001680 brushing effect Effects 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000005553 drilling Methods 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 4
- 230000015556 catabolic process Effects 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 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
- 239000003292 glue Substances 0.000 claims description 3
- 239000004519 grease Substances 0.000 claims description 3
- 238000003801 milling Methods 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 4
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 abstract description 4
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 239000004020 conductor Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 241001089723 Metaphycus omega Species 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 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
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- 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 turbogenerator and a preparation method thereof, belonging to the technical field of brushless turbogenerators, and comprising a first conducting rod and a second conducting rod, wherein the first conducting rod and the second conducting rod are symmetrically distributed in a staggered manner, a spacing insulating plate is arranged between the first conducting rod and the second conducting rod, one end of the first conducting rod and one end of the second conducting rod are provided with insulating cushion blocks, the first conducting rod and the second conducting rod are provided with a plurality of positioning insulating pins penetrating through the first conducting rod, the second conducting rod and the spacing insulating plate, the first conducting rod and the second conducting rod are respectively provided with a plurality of lead screw holes, and the peripheries of the first conducting rod and the second conducting rod are provided with high-strength epoxy glass grey cloth which extends to the insulating cushion blocks and is wrapped with the first conducting rod, the second conducting rod and the insulating cushion blocks in a winding manner. The device has the characteristics of compact structure, no gap and good insulation structure integrity. The problem of the hole dislocation for the lead wire is solved, the phenomenon that the device can not be installed is avoided.
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 turbonator is provided by the brushless exciter, and the exciting current is loaded by the positive and negative current loops formed by the two conducting rods in the rotor part. The rotor conducting rod is a key part for conducting the excitation current of the brushless steam turbine generator.
In the prior art, a rotor conducting rod is generally of an insulation structure plugged by an insulation tube and a wedge-shaped plate, 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 structure preparation method has multiple processes, the conducting rod and the wedge-shaped plate are arranged in the insulating tube step by step, and the counter bore on the insulating tube and the lead mounting screw hole arranged on the conducting rod can have dislocation after assembly.
3. When the straightness of the inner hole of the insulating tube is poor, the conductive rod and the wedge-shaped plate cannot be assembled, and the quality is difficult to control.
Disclosure of Invention
The invention mainly solves the defects of large gap, poor integrity of an insulation structure, high assembly difficulty and easy dislocation in the prior art, and provides the rotor conducting rod structure for the brushless steam turbine generator and the preparation method thereof. The problem of the hole dislocation for the lead wire is solved, the phenomenon that the device can not be installed is avoided.
The technical problem of the invention is mainly solved by the following technical scheme:
the utility model provides a rotor conducting rod structure for brushless turbo generator, includes first conducting rod and second conducting rod, first conducting rod, the transversal semicircle structure of personally submitting of second conducting rod, first conducting rod and second conducting rod be staggered form 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, the insulating cushion that second conducting rod looks plug-in connection, 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 lie in between two location insulating pins and between location insulating cushion and insulating cushion, first conducting rod, second conducting rod periphery be equipped with extend to insulating and with first conducting rod, second conducting rod, And the second conductive rod and the insulating cushion block are wrapped in a winding manner to form the high-strength epoxy glass grey cloth.
Preferably, polyimide film belts which are respectively wrapped and sleeved with the first conductive rod and the second conductive rod are arranged on the periphery of the first conductive rod and the periphery of the second conductive rod, 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 spaced insulating plate.
Preferably, the arc end surface of the first conducting rod and the arc end surface of the second conducting 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 material of the locating insulating pin is epoxy glass cloth rod, and the number 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 is as follows: and arranging the end parts of the first conductive rod and the second conductive rod in a staggered manner, fastening the first conductive rod and the second conductive rod by using a temporary binding belt, drilling lead threaded holes on the first conductive rod and the second conductive rod, and drilling through the two parts.
The second step is that: and removing the temporary binding belt, arranging the end parts of the first conductive rod and the second conductive rod in a staggered manner, placing an insulating plate between the first conductive rod and the second conductive rod, and installing an insulating cushion block to enable one end of the insulating cushion block to be flush with the first conductive rod and the other end of the insulating cushion block to be flush with the second conductive rod.
The third step: and integrally fastening the first conductive rod, the second conductive rod and the interval insulating plate by using a temporary binding belt, and simultaneously drilling two pin holes on the first conductive rod, the second conductive rod and the interval insulating plate, wherein the pin holes need to be drilled through.
The fourth step: and removing the temporary binding belt, brushing epoxy resin on the surfaces of the outer circles of the first conductive rod and the second conductive rod respectively, half-lapping 1 layer of polyimide film belt on the outer circles of the first conductive rod and the second conductive rod respectively after brushing the epoxy resin, and not lapping the polyimide film belt on the lead screw hole and the pin hole.
The fifth step: and the 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.
And a sixth step: and brushing epoxy resin on one end face 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 the integral rotor conductive rod.
The seventh step: and (3) 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 the process compression belt.
Eighth step: and coating 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 ninth step: and demolding after molding, taking the rotor conducting rod out of the hot-pressing mold, removing the flowing glue, and finishing the insulating excircle.
The tenth step: turning an insulating excircle of the conducting rod, wherein the diameter size meets the design requirement, and the tolerance of the conducting rod is controlled to be +/-0.1 mm;
the eleventh step: and taking out the process screw in the screw hole, and milling a counter bore at the threaded hole of the lead on the insulating excircle.
Preferably, the hot pressing die adopts two hot pressing die semicircular pressing pipes to fix the rotor conducting rod in a pressing mode, a plurality of fixed connecting blocks on two sides of each hot pressing die semicircular pressing pipe are fixed through 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 discharged after being preheated, then the nuts and bolts on the hot pressing die are screwed, then the hot pressing die is placed into the heating furnace to be heated to 200 ℃, the temperature is kept for 2 hours, and the rotor conducting rod is solidified and formed.
Preferably, the first conductive rod and the second conductive rod pass the 2000V alternating current withstand voltage test respectively, and breakdown does not occur within 1 minute. The purpose is as follows: 1. judging whether the insulating structure has defects or not; 2. and judging the electrical strength performance of the insulation, namely the capacity of the insulation to bear overvoltage.
Preferably, the insulation resistance between the first conductor bar and the second conductor bar is not less than 5 M.OMEGA.A 500V megohm meter is used to measure the insulation resistance between the first conductor bar and the second conductor bar, and the insulation resistance is not less than 5 M.OMEGA..
Preferably, the rotor conducting rod is integrally subjected to a 6000V alternating current withstand voltage test and does not break down within 1 minute. The purpose is as follows: 1. judging whether the insulating structure has defects or not; 2. and judging the electrical strength performance of the insulation, namely the capacity 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 and the preparation method thereof have the characteristics of compact structure, no gap and good integrity of an insulating structure. The problem of the hole dislocation for the lead wire is solved, the phenomenon that the device can not be installed is avoided.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a cross-sectional structural section view of the present invention.
Fig. 3 is a schematic top view of the hot-press die assembly of the present invention.
Fig. 4 is a structural sectional view of the hot press die assembly of the present invention.
Fig. 5 is a schematic structural view of the process screw of the present invention.
In the figure: the high-strength epoxy glass fabric comprises a first conductive rod 1, an interval insulating plate 2, a second conductive rod 3, a lead threaded hole 4, a counter bore 5, a polyimide film belt 6, epoxy resin 7, an insulating cushion block 8, high-strength epoxy glass grey cloth 9, a positioning insulating pin 10, a fixed connecting block 11, a hot-pressing die semi-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 by the following embodiments and the accompanying drawings.
Example (b): as shown in fig. 1-5, a rotor conducting rod structure for a brushless steam turbine generator includes a first conducting rod 1 and a second conducting rod 3, the cross sections of the first conducting rod 1 and the second conducting rod 3 are semi-circular structures, polyimide film belts 6 respectively wrapped and sleeved with the first conducting rod 1 and the second conducting rod 3 are respectively disposed on the periphery of the first conducting rod 1 and the periphery of the second conducting rod 3, epoxy resin 7 is disposed between the first conducting rod 1 and the polyimide film belts 6, between the second conducting rod 3 and the polyimide film belts 6, between the insulating pad 8 and the first conducting rod 1, between the insulating pad 8 and the second conducting rod 3, and between the insulating pad 8 and the insulating plate 2. The first conductive rod 1 and the second conductive rod 3 are distributed symmetrically in a staggered mode, an interval insulating plate 2 is arranged between the first conductive rod 1 and the second conductive rod 3, one end of each of the first conductive rod 1 and the second conductive rod 3 is provided with an insulating cushion block 8 which is 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 conducting rod 1 and the second conducting rod 3 are provided with 2 positioning insulating pins 10 which penetrate through the first conducting rod 1, the second conducting rod 3 and the insulating plate 2 at intervals, and the positioning insulating pins 10 are made of epoxy glass cloth rods. The first conducting rod 1 and the second conducting rod 3 are respectively provided with 2 lead screw holes 4 which are positioned between two positioning insulation pins 10 and between the positioning insulation pins 10 and the insulation cushion blocks 8, and the arc end surface of the first conducting rod 1 and the arc end surface of the second conducting rod 3 are respectively provided with 2 counter bores 5 which are 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 is as follows: the end parts 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 through a temporary binding belt, and lead threaded holes 4 are drilled in the first conductive rod 1 and the second conductive rod 3, and the two parts are drilled through.
The second step is that: and (3) 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 an interval insulating plate 2 between the first conductive rod 1 and the second conductive rod 3, and installing an insulating cushion block 8 to enable one end of the insulating cushion block 8 to be flush with the first conductive rod 1 and the other end to be flush with the second conductive rod 3.
The third step: the first current-conducting rod 1, the second current-conducting rod 3 and the interval insulating plate 2 are integrally tied by using a temporary binding belt, two pin holes are drilled on the first current-conducting rod 1, the second current-conducting rod 3 and the interval insulating plate 2 at the same time, and the pin holes need to be drilled through.
The fourth step: and (3) 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, after brushing the epoxy resin 7, half-overlapping and wrapping 1 layer of polyimide film belt 6 on the outer circles of the first conductive rod and the second conductive rod respectively, and not wrapping the polyimide film belt 6 at the lead screw hole 4 and the pin hole.
The fifth step: two positioning insulation pins 10 are arranged in pin holes of the first current-conducting rod 1, the second current-conducting rod 3 and the interval insulation plate 2, and then four process screws 15 are respectively arranged in lead screw holes 4 of the first current-conducting rod 1 and the second current-conducting rod 3.
And a sixth step: and brushing epoxy resin 7 on one end face of the first conductive rod 1, the second conductive rod 3 and the interval insulating plate 2, and inserting and firmly adhering the insulating cushion blocks 8 to form the integral rotor conductive rod.
The seventh step: and (3) wrapping the outer ring of the rotor conducting rod by using high-strength epoxy glass grey cloth 9, wrapping 17 layers in total, and finally wrapping a process compression belt.
Eighth step: and coating 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 hot-pressing die adopts two hot-pressing die semicircular pressing pipes 12 to fix the rotor conducting rod in a pressing mode, 8 fixed connecting blocks 11 on two sides of each hot-pressing die semicircular pressing pipe 12 are fixed through bolts 13 and nuts 14, then the hot-pressing die is placed into a heating furnace to be slowly heated to 135-165 ℃, the hot-pressing die is discharged after being preheated, the nuts 14 and the bolts 13 on the hot-pressing die are screwed, then the hot-pressing die is placed into the heating furnace to be heated to 200 ℃, the temperature is kept for 2 hours, and the rotor conducting rod is solidified and formed.
The ninth step: demoulding after forming, taking the rotor conducting rod out of the hot-pressing mould, removing the flowing glue, and finishing the insulating excircle;
the tenth step: turning an insulating excircle of the conducting rod, wherein the diameter size meets the design requirement, and the tolerance of the conducting rod is controlled to be +/-0.1 mm;
the eleventh step: and taking out the process screw 15 in the screw hole, and milling a counter bore 5 at the position of the lead screw hole 4 on the insulating excircle.
The first conductive rod 1 and the second conductive rod 3 respectively pass a 2000V alternating current withstand voltage test, and breakdown is not qualified within 1 minute. The insulation resistance between the first conductive rod 1 and the second conductive rod 3 is measured by a 500V megohm meter, and the insulation resistance between the first conductive rod 1 and the second conductive rod 3 is not less than 5M omega, which is qualified. The whole rotor conducting rod is qualified after being subjected to a 6000V alternating current withstand voltage test for 1 minute.
In conclusion, 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 insulation structural integrity. The problem of the hole dislocation for the lead wire is solved, the phenomenon that the device can not be installed is avoided.
The above description is only an embodiment of the present invention, but the structural features of the present invention are not limited thereto, and any changes or modifications within the scope of the present invention by those skilled in the art are covered by the present invention.
Claims (9)
1. The utility model provides a rotor conducting rod structure for brushless turbo generator which characterized in that: including first conducting rod (1) and second conducting rod (3), first conducting rod (1), second conducting rod (3) transversal personally submit half circular structure, first conducting rod (1) and second conducting rod (3) be staggered symmetric distribution, first conducting rod (1) and second conducting rod (3) between 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) and insert insulating pad (8) of inlaying the connection mutually, first conducting rod (1), second conducting rod (3) on be equipped with a plurality of location insulating pin (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 respectively be equipped with a plurality of lead wires that are located between two location insulating pin (10) and between location insulating pin (10) and insulating pad (8) The high-strength epoxy glass grey cloth winding device comprises a threaded hole (4), wherein high-strength epoxy glass grey cloth (9) which extends to an insulating cushion block (8) and is wound and coated with the first conductive rod (1), the second conductive rod (3) and the insulating cushion block (8) is arranged on the peripheries of the first conductive rod (1) and the second conductive rod (3).
2. The rotor conducting rod structure for a brushless steam turbine generator according to claim 1, characterized in that: the novel conductive bar is characterized in that polyimide film belts (6) which are respectively sleeved with the first conductive bar (1) and the second conductive bar (3) in a wrapping mode are arranged on the periphery of the first conductive bar (1) and the periphery of the second conductive bar (3), epoxy resin (7) is arranged between the first conductive bar (1) and the polyimide film belts (6), between the second conductive bar (3) and the polyimide film belts (6), between the insulating cushion block (8) and the first conductive bar (1), between the insulating cushion block (8) and the second conductive bar (3), and between the insulating cushion block (8) and the spaced insulating plate (2).
3. The rotor conducting rod structure for a brushless steam turbine generator according to claim 1, characterized in that: and a plurality of counter bores (5) communicated with the lead threaded holes (4) are arranged on the arc end surface of the first conductive rod (1) and the arc end surface of the second conductive rod (3).
4. The rotor conducting rod structure for a brushless steam turbine generator according to claim 1, characterized in that: 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. A preparation method of a rotor conducting rod structure for a brushless steam turbine generator is characterized by comprising the following operation steps:
the first step is as follows: arranging the end parts of the first conductive rod (1) and the second conductive rod (3) in a staggered manner, tightly binding the first conductive rod (1) and the second conductive rod (3) by using a temporary binding belt, drilling lead threaded holes (4) on the first conductive rod (1) and the second conductive rod (3) at two positions in total, and drilling through;
the second step is that: 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 an interval insulating plate (2) between the first conductive rod (1) and the second conductive rod (3), and installing an insulating cushion block (8) to enable one end of the insulating cushion block (8) to be flush with the first conductive rod (1) and the other end to be flush with the second conductive rod (3);
the third step: integrally binding the first conductive rod (1), the second conductive rod (3) and the interval insulating plate (2) by using a temporary binding tape, and simultaneously drilling two pin holes on the first conductive rod (1), the second conductive rod (3) and the interval insulating plate (2), wherein the pin holes need to be drilled through;
the 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, after brushing the epoxy resin (7), half-wrapping 1 layer of polyimide film belt (6) on the outer circles of the first conductive rod and the second conductive rod respectively, and not wrapping the polyimide film belt (6) at the lead screw hole (4) and the pin hole;
the fifth step: two positioning insulation pins (10) are arranged in pin holes of a first conductive rod (1), a second conductive rod (3) and a spacing insulation 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);
and a sixth step: brushing epoxy resin (7) on one end face of the first conductive rod (1), the second conductive rod (3) and the interval insulating plate (2), and inserting and firmly adhering the insulating cushion block (8) to form an integral rotor conductive rod;
the seventh step: wrapping the outer ring of the rotor conducting rod by using high-strength epoxy glass grey cloth (9), wrapping a plurality of layers, and finally wrapping a process compression belt;
eighth step: coating 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 molding;
the ninth step: demoulding after forming, taking the rotor conducting rod out of the hot-pressing mould, removing the flowing glue, and finishing the insulating excircle;
the tenth step: turning an insulating excircle of the conducting rod, wherein the diameter size meets the design requirement, and the tolerance of the conducting rod is controlled to be +/-0.1 mm;
the 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 conducting rod structure for a brushless steam turbine generator according to claim 5, wherein:
the hot pressing die adopts two hot pressing die semicircular pressing pipes (12) to fix the rotor conducting rod in a pressing mode, a plurality of fixed connecting blocks (11) on two sides of each hot pressing die semicircular pressing pipe (12) are fixed through bolts (13) and nuts (14), then the hot pressing die is placed into a heating furnace to slowly heat to 135-165 ℃, the hot pressing die is discharged after being preheated, the nuts (14) and the bolts (13) on the hot pressing die are screwed, then the temperature is raised to 200 ℃ in the heating furnace, the temperature is kept for 2 hours, and the rotor conducting rod is solidified and formed.
7. The method for manufacturing a rotor conducting rod structure for a brushless steam turbine generator according to claim 5, wherein: the first conductive rod (1) and the second conductive rod (3) pass 2000V alternating current withstand voltage tests respectively, and breakdown is not caused to be qualified within 1 minute.
8. The method for manufacturing a rotor conducting rod structure for a brushless steam turbine generator according to claim 5, wherein: the insulation resistance between the first conductive rod (1) and the second conductive rod (3) is not less than 5M omega, and the insulation resistance between the first conductive rod (1) and the second conductive rod (3) is measured by a 500V megohm meter, and is not less than 5M omega.
9. The method for manufacturing a rotor conducting rod structure for a brushless steam turbine generator according to claim 5, wherein: the whole rotor conducting rod is subjected to a 6000V alternating current withstand voltage test and is not broken down within 1 minute.
Priority Applications (1)
| 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 |
Applications Claiming Priority (1)
| 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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| Publication Number | Publication Date |
|---|---|
| CN114243315A true CN114243315A (en) | 2022-03-25 |
| CN114243315B CN114243315B (en) | 2024-01-09 |
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| 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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| 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 |
| US20140232220A1 (en) * | 2013-02-15 | 2014-08-21 | Alstom Technology Ltd | Rotor of an electric machine |
| 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 |
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