CN113489250A - Large-scale shielding motor flywheel shell hot sleeving process - Google Patents
Large-scale shielding motor flywheel shell hot sleeving process Download PDFInfo
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- CN113489250A CN113489250A CN202110759754.5A CN202110759754A CN113489250A CN 113489250 A CN113489250 A CN 113489250A CN 202110759754 A CN202110759754 A CN 202110759754A CN 113489250 A CN113489250 A CN 113489250A
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- flywheel
- flywheel shell
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- insulating cylinder
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- 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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- 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
- H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines
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- 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
- H02K15/14—Casings; Enclosures; Supports
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
The invention relates to a large-scale canned motor flywheel shell shrink fit process, which adopts a crane (1), a sling (2), a first lifting ring (3), a second lifting ring (5) and a heat-insulating cylinder (7) for assembly, installs a flywheel shell (6) into the heat-insulating cylinder (7), and adjusts the flywheel shell (6) to a circle, so that the roundness tolerance of an inner hole of the flywheel shell (6) is less than 0.1 mm; the heat preservation cylinder (7) provided with the flywheel shell (6) is integrally placed into a heating furnace (8) for heating by adopting a second lifting ring (5). The invention solves the problems that the thin-wall piece hot jacket has poor roundness, is not uniformly heated, has quick heat dissipation, is difficult to ensure an assembly gap in the hot jacket process, is easy to deflect in a flywheel shell thin-wall piece hot jacket mode, generates clamping stagnation of a flywheel and the like, and ensures the hot jacket quality of the thin-wall piece flywheel shell and the performance of a shielding motor.
Description
The technical field is as follows:
the invention relates to a large-scale shielding motor flywheel shell shrink fit process.
Background art:
with the development and application of nuclear power technology, the safety of nuclear power plants is continuously improved and improved, and large-scale shielding motor pumps are widely adopted. The shielding motor pump is structurally provided with an upper flywheel and a lower flywheel, so that high rotational inertia is provided for a main pump motor, and the idling characteristic of the main pump is guaranteed. The outer circle of the flywheel is provided with a shell made of alloy 625 through a hot sleeve, and the shell is used for protecting the flywheel from being corroded. The wall thickness of the shell is 2mm, the height is 450mm, the diameter is 1000mm, and the hot-shrink amount is 0.8 mm. Generally, the thin-wall piece hot jacket mostly adopts a mode of lifting and leveling the thin-wall piece, heating the thin-wall piece by flame to expand the thin-wall piece, and then lowering the hot jacket to a matched workpiece. However, the temperature of the flame heating workpiece is not uniform, the heat dissipation of the thin-wall part in the air is fast, the gap of the heat jacket is not uniform, the assembly gap is difficult to guarantee, meanwhile, the roundness of the thin-wall part is poor, the heat of the thin-wall part is quickly absorbed by the workpiece after the thin-wall part is contacted with the workpiece in the descending process, the assembly gap is quickly reduced, the speed of the heat jacket needs to be increased, but the thin-wall part is light in weight, is easy to deflect when descending, and is easy to clamp the workpiece in the descending process, so that the failure of the heat jacket is caused. Therefore, the workpiece level, the assembly gap and the hot jacket time in the hot jacket process are very important to be ensured, and the problems of the workpiece level, the hot jacket assembly gap and the hot jacket time are difficult to solve by adopting a mode of heating the thin-wall part and lowering the thin-wall part to the workpiece through hot jacket.
The invention content is as follows:
the invention aims to provide a large shielding motor flywheel shell hot sleeving process, which solves the problems of poor roundness of a thin-wall part, uneven heating temperature, quick heat dissipation, difficulty in keeping the workpiece horizontal in a hot sleeving process, assembly clearance and hot sleeving time, and ensures the success of hot sleeving of the thin-wall part.
The technical scheme of the invention is as follows: the utility model provides a large-scale canned motor flywheel shell shrink fit technology, adopts crane (1), suspender (2), first rings (3), second rings (5), heat preservation section of thick bamboo (7) to assemble, the method includes following steps:
a) installing the flywheel shell (6) into the heat-insulating cylinder (7), and rounding the flywheel shell (6) to ensure that the roundness tolerance of the inner hole of the flywheel shell (6) is less than 0.1 mm;
b) a second lifting ring (5) is adopted to integrally place the heat-preserving cylinder (7) provided with the flywheel shell (6) into a heating furnace (8) for heating;
c) a crane (1), a hanging strip (2) and a first hanging ring (3) are adopted to lift the flywheel (4), and the levelness of the upper end surface of the flywheel (4) is adjusted to be within 0.2mm through the hanging strip (2);
d) and b), after the heat-insulating cylinder (7) provided with the flywheel shell (6) is heated, opening the furnace cover (9), lifting the heat-insulating cylinder (7) provided with the flywheel shell (6) out of the heating furnace (8) to be placed on the working platform, enabling the descending flywheel (4) to be located above the flywheel shell (6), adjusting the flywheel, enabling the clearance between the outer circle of the flywheel and the inner hole of the flywheel shell to be uniform, continuing to descend the flywheel to fall into the flywheel shell, and completing the thermal sleeve installation of the flywheel shell.
The wall thickness of the heat-insulating cylinder (7) adopted in the step a) is 50mm, the height of the heat-insulating cylinder (7) is 450mm, the height of the heat-insulating cylinder (7) is flush with that of the flywheel shell (6), and the assembly clearance between the inner diameter of the heat-insulating cylinder (7) and the flywheel shell is 0.1 mm.
The working principle of the invention is as follows:
in the process of thermal sleeving, the thermal insulation cylinder is adopted, the flywheel shell of the thin-wall part is rounded, and meanwhile, the flywheel shell is placed into the thermal insulation cylinder and integrally enters the heating furnace for heating, so that the flywheel shell is uniformly heated, and the flywheel shell and the thermal insulation cylinder are assembled and attached together, which is equivalent to increasing the wall thickness of the thin-wall part, plays the roles of thermal insulation and heat dissipation time extension on the flywheel shell, ensures the thermal sleeving time and the thermal sleeving assembly gap, and is beneficial to thermal sleeving operation; the flywheel falls into the thin-wall flywheel shell, and the flywheel is heavy, so that the falling process is stable, deflection is not easy to occur, a workpiece is conveniently found and positioned in the heat sleeving process, clamping stagnation in the heat sleeving process is avoided by utilizing the dead weight of the flywheel, smooth operation of the assembly process is ensured, and the flywheel is convenient, safe, reliable and stable to operate.
The invention has the technical effects that:
the flywheel shell of the shielding motor is expensive in manufacturing cost, the flywheel shell and the flywheel are assembled with 0.8mm of tightness, the wall thickness is only 2mm, if a flame is adopted to heat the flywheel shell and reduce the flywheel shell to fall into a flywheel mode, the wall thickness of the flywheel shell is thin, the roundness is poor, the heat dissipation is fast, the workpiece is light, the descending process is easy to deflect, the heat can be rapidly absorbed away after the flywheel shell is contacted with the flywheel to cause the assembly clearance to be rapidly reduced, the difficulty of the heat jacket is large, clamping stagnation is easy to occur during hot assembly, the heat jacket fails, and the workpiece is scrapped. According to the large-scale shielding motor flywheel shell hot sleeving process, the flywheel shell is installed in the heat insulation cylinder to be rounded by adding the heat insulation cylinder, the heat insulation cylinder and the flywheel shell are integrally heated by the heating furnace, and the flywheel falls into the thin-wall flywheel shell to complete hot sleeving, so that the problems of poor roundness of the thin-wall part, uneven heating temperature, quick heat dissipation, difficulty in maintaining the level of a workpiece in a hot sleeving process, assembly clearance and hot sleeving time are solved, the success of hot sleeving of the thin-wall part is ensured, and the hot assembling of the thin-wall part of the flywheel shell is simple, safe, reliable and stable.
Drawings
FIG. 1 is a schematic view of the flywheel housing mounted to a heat-insulating cylinder and heated
FIG. 2 is a schematic view of the level adjustment of the flywheel
FIG. 3 is a schematic view of a flywheel housing thermal sleeve.
Detailed Description
As shown in fig. 3, a large-scale canned motor flywheel shell shrink fit process adopts a crane 1, a hanging strip 2, a first hanging ring 3, a second hanging ring 5 and a heat-insulating cylinder 7 for assembly, and the method comprises the following steps:
a) as shown in fig. 1, a flywheel shell 6 is arranged in a heat preservation cylinder 7, and the flywheel shell is adjusted to be round, so that the roundness tolerance of an inner hole of the flywheel shell 6 is smaller than 0.1 mm;
b) as shown in fig. 1, a heat preservation cylinder 7 provided with a flywheel shell 6 is integrally placed into a heating furnace 8 for heating by adopting a second lifting ring 5;
c) as shown in fig. 2, a crane 1, a hanging strip 2 and a first hanging ring 3 are adopted to lift a flywheel 4, and the levelness of the upper end surface of the flywheel 4 is adjusted to be within 0.2mm through the hanging strip 2;
d) as shown in figure 3, after the heat preservation cylinder 7 provided with the flywheel shell 6 is heated, the furnace cover 9 is opened, the heat preservation cylinder 7 provided with the flywheel shell 6 is lifted out of the heating furnace 8 and placed on a working platform, the descending flywheel 4 is positioned above the flywheel shell 6, the flywheel is adjusted to ensure that the flywheel continues to descend to fall into the flywheel shell after the gap between the excircle of the flywheel and the inner hole of the flywheel shell is uniform,
and finishing the thermal sleeve installation of the flywheel shell.
The wall thickness of the heat-insulating cylinder 7 adopted in the step a) is 50mm, the height of the heat-insulating cylinder 7 is 450mm, the height of the heat-insulating cylinder 7 is flush with that of the flywheel shell 6, the assembly gap between the inner diameter of the heat-insulating cylinder and the flywheel shell is 0.1mm, the roundness of the flywheel shell is adjusted to be less than 0.1mm, the aim of increasing the wall thickness of the thin-walled part of the flywheel shell is fulfilled, and the functions of rounding, heat insulation and heat dissipation time prolonging are achieved for the thin-walled part of the flywheel shell.
As shown in fig. 1, in the step d), the heat-insulating cylinder 7 provided with the flywheel shell 6 is lifted out of the heating furnace 8 and placed on the working platform, the descending flywheel 4 is positioned above the flywheel shell 6, and the descending flywheel continues to fall into the flywheel shell, so that the thermal sleeve installation of the flywheel shell is completed.
Claims (2)
1. A large-scale canned motor flywheel shell shrink fit process is characterized in that: assembling by adopting a crane (1), a hanging strip (2), a first hanging ring (3), a second hanging ring (5) and a heat-insulating cylinder (7), wherein the method comprises the following steps:
a) installing the flywheel shell (6) into the heat-insulating cylinder (7), and rounding the flywheel shell (6) to ensure that the roundness tolerance of the inner hole of the flywheel shell (6) is less than 0.1 mm;
b) a second lifting ring (5) is adopted to integrally place the heat-preserving cylinder (7) provided with the flywheel shell (6) into a heating furnace (8) for heating;
c) a crane (1), a hanging strip (2) and a first hanging ring (3) are adopted to lift the flywheel (4), and the levelness of the upper end surface of the flywheel (4) is adjusted to be within 0.2mm through the hanging strip (2);
d) and b), after the heat-insulating cylinder (7) provided with the flywheel shell (6) is heated, opening the furnace cover (9), lifting the heat-insulating cylinder (7) provided with the flywheel shell (6) out of the heating furnace (8) to be placed on the working platform, enabling the descending flywheel (4) to be located above the flywheel shell (6), adjusting the flywheel, enabling the clearance between the outer circle of the flywheel and the inner hole of the flywheel shell to be uniform, continuing to descend the flywheel to fall into the flywheel shell, and completing the thermal sleeve installation of the flywheel shell.
2. The large-scale shielding motor flywheel shell shrink fit process as claimed in claim 1, which is characterized in that: the wall thickness of the heat-insulating cylinder (7) adopted in the step a) is 50mm, the height of the heat-insulating cylinder (7) is 450mm, the height of the heat-insulating cylinder (7) is flush with that of the flywheel shell (6), and the assembly clearance between the inner diameter of the heat-insulating cylinder (7) and the flywheel shell is 0.1 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110759754.5A CN113489250A (en) | 2021-07-05 | 2021-07-05 | Large-scale shielding motor flywheel shell hot sleeving process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110759754.5A CN113489250A (en) | 2021-07-05 | 2021-07-05 | Large-scale shielding motor flywheel shell hot sleeving process |
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| Publication Number | Publication Date |
|---|---|
| CN113489250A true CN113489250A (en) | 2021-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110759754.5A Pending CN113489250A (en) | 2021-07-05 | 2021-07-05 | Large-scale shielding motor flywheel shell hot sleeving process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115302188A (en) * | 2022-08-22 | 2022-11-08 | 河南中原特钢装备制造有限公司 | Core rod hot charging device and method for radial precision forging machine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101951084A (en) * | 2010-09-21 | 2011-01-19 | 大连理工大学 | Inversed hot sheathing technology of nuclear main pump rotor shielding can |
| CN105871135A (en) * | 2016-06-26 | 2016-08-17 | 高玉琴 | Hot assembly tool for motor rotor |
| CN106341004A (en) * | 2016-11-17 | 2017-01-18 | 哈尔滨电气动力装备有限公司 | Processing and mounting process for rotor retaining ring of shielded motor |
| GB201820598D0 (en) * | 2018-12-18 | 2019-01-30 | Protean Electric Ltd | A method for assembling a stator for an electric motor or generator |
| CN109396745A (en) * | 2018-12-11 | 2019-03-01 | 云南大为化工装备制造有限公司 | A kind of high-precision fitting technique of pressure vessel shrink-fitted shell |
| CN213185685U (en) * | 2020-10-30 | 2021-05-11 | 宁德特波电机有限公司 | Rust-resistant motor housing that loses of easy assembly |
-
2021
- 2021-07-05 CN CN202110759754.5A patent/CN113489250A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101951084A (en) * | 2010-09-21 | 2011-01-19 | 大连理工大学 | Inversed hot sheathing technology of nuclear main pump rotor shielding can |
| CN105871135A (en) * | 2016-06-26 | 2016-08-17 | 高玉琴 | Hot assembly tool for motor rotor |
| CN106341004A (en) * | 2016-11-17 | 2017-01-18 | 哈尔滨电气动力装备有限公司 | Processing and mounting process for rotor retaining ring of shielded motor |
| CN109396745A (en) * | 2018-12-11 | 2019-03-01 | 云南大为化工装备制造有限公司 | A kind of high-precision fitting technique of pressure vessel shrink-fitted shell |
| GB201820598D0 (en) * | 2018-12-18 | 2019-01-30 | Protean Electric Ltd | A method for assembling a stator for an electric motor or generator |
| CN213185685U (en) * | 2020-10-30 | 2021-05-11 | 宁德特波电机有限公司 | Rust-resistant motor housing that loses of easy assembly |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115302188A (en) * | 2022-08-22 | 2022-11-08 | 河南中原特钢装备制造有限公司 | Core rod hot charging device and method for radial precision forging machine |
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Application publication date: 20211008 |