CN105356688A - Apparatus and method for prolonging time of heating assembling of rotor shielding sleeve of nuclear main pump - Google Patents
Apparatus and method for prolonging time of heating assembling of rotor shielding sleeve of nuclear main pump Download PDFInfo
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- CN105356688A CN105356688A CN201510806952.7A CN201510806952A CN105356688A CN 105356688 A CN105356688 A CN 105356688A CN 201510806952 A CN201510806952 A CN 201510806952A CN 105356688 A CN105356688 A CN 105356688A
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- heat
- shielding sleeve
- insulation layer
- rotor
- insulation layers
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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
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention, which belongs to the nuclear electrical field, provides an apparatus and method for prolonging time of heating assembling of a rotor shielding sleeve of a nuclear main pump. The apparatus comprises heat-insulation layers having tile-shaped structures and a tightening band having a strip-shaped structure. The heat-insulation layers tighten and lock a rotor shielding sleeve in sequence with the tightening band; and then the tightening band arranged at the outermost layer applies a circumferential tightening force to ensure that no gap exists between the heat-insulation layers. With the apparatus and the method, the heating assembling process of the rotor shielding sleeve of the nuclear main pump can be completed successfully, thereby improving the success rate. Because the heat-insulation layers and the tightening band use the same materials, no thermal stress is caused during thermal expansion. With the heat-insulation layers, the thickness of the shielding sleeve is increased, so that the temperature reduction speed of the shielding sleeve can be controlled and the heat assembling time can be prolonged based on heat transfer of the heat-insulation layers during the heat assembling process; and the rigidity of the shielding sleeve is enhanced, so that the shielding sleeve is free from the external stress interference during the whole process and thus is not easy to deform. The heat-insulation layers can be dismounted or assembled repeatedly; the apparatus can be used and operated simply and easily; and the production cost is lowered and the production efficiency is improved.
Description
Technical field
The present invention relates to a kind of apparatus and method extending the rotor shielding sleeve of nuclear main pump shrink-on time, be mainly used in the assembling of rotor shielding sleeve of nuclear main pump, belong to nuclear power field.
Background technology
Core main pump is slewing unique in one loop of nuclear power station system, is the heart of nuclear island, belongs to nuclear safety first device, is one of key equipment of pressurized-water reactor nuclear power plant.For the non-active nuclear reactor of the third generation, what it adopted is a kind of canned pump with shield electric machine, motor in pump is vertical, water-cooled, cage type induction motor, rotor housing can prevent rotor bar from contacting with reactor coolant, its processing and assembly quality directly affect the normal operation of core main pump, are one of critical components in core main pump.
The material selection of rotor shielding sleeve is corrosion-resistant, high temperature resistance, oxidation resistant nonmagnetic metal HastelloyC-276 alloy, and its processing technology is divided into blanking cutting, rolling shaping, welding, orthopedic and assemble several operation.Wherein, to meet forming accuracy and roundness require after housing carry out elastic conjunction by shrink-on technique and rotor.This is rotor vital operation in follow-up whole assembling process, is also the procedure guaranteeing rotor safe operation most critical in corrosive atmosphere.
Shrink-on full name heating assembling is a kind of connection of interference fit.Hot cover process completes at relatively high temperatures, and ensure that temperature when being set with must higher than workpiece temperature, namely hot cover process is suitable for the connection of work workpiece at a lower temperature.This technique is used in the assembling of impeller of steam turbine rotor, the assembling of shaft coupling, the assembling of bearing, the assembling of gear.
Summary of the invention
In order to overcome problems of the prior art, the invention provides a kind of apparatus and method extending the rotor shielding sleeve of nuclear main pump shrink-on time.These apparatus and method not only can delay the time needed for rotor shielding sleeve shrink-on, improve the success rate of shrink-on, and also can improve the rigidity of housing simultaneously, and operation is simple reduces the difficulty of housing shove charge.
Technical solution of the present invention is: a kind of device extending the rotor shielding sleeve of nuclear main pump shrink-on time, described device comprises watt heat-insulation layer of shape structure and the clamping band of list structure, the size range of described heat-insulation layer is length 300-600mm, internal diameter is identical with rotor diameter, radian is pi/2, thickness 0.2-2mm, adopts the manufacture of HastelloyC-276 alloy, and the number of plies of heat-insulation layer selects 1-20 layer according to reality suit operating mode; The size range of described boot band is width 5-50mm, length 1000-2000mm, adopts the manufacture of HastelloyC-276 alloy, and the usage quantity of clamping band selects 1-20 root according to actual condition.
A kind of method extending the rotor shielding sleeve of nuclear main pump shrink-on time adopts boot band lock ring multi-layer heat preserving layer, the banding process of described heat-insulation layer refer to heat-insulation layer from inside to outside every layer around an angle of 90 degrees that rotates in a circumferential direction, order is followed and is adjacent on rotor shielding sleeve, then guarantees gapless between every layer of heat-insulation layer by boot band at outermost applying hoop tightening force.
The beneficial effect that the present invention reaches is: the device of this prolongation rotor shielding sleeve of nuclear main pump shrink-on time comprises watt heat-insulation layer of shape structure and the clamping band of list structure, the banding process of heat-insulation layer refer to heat-insulation layer from inside to outside every layer around an angle of 90 degrees that rotates in a circumferential direction, order is followed and is adjacent on rotor shielding sleeve, then guarantees gapless between every layer of heat-insulation layer by boot band at outermost applying hoop tightening force.These apparatus and method contribute to completing rotor shielding sleeve of nuclear main pump shrink-on process smoothly, improve success rate.Because heat-insulation layer and boot band use the material manufacture the same with housing to form, while expanded by heating, do not have the generation of thermal stress.Heat-insulation layer adds the thickness of housing, and the cooling rate that not only can control rotor shielding sleeve by heat-insulation layer heat transfer when shrink-on extends the shrink-on time but also the rigidity adding housing makes it be not easy to be subject to the interference of extraneous stress in whole process and is out of shape.Heat-insulation layer can repeated removal assembling use operation is simple, reduce production cost, improve production efficiency.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, this outbreak is further illustrated.
Fig. 1 is rotor shielding sleeve of nuclear main pump heat insulation layer structure device assembling schematic diagram.
Fig. 2 is rotor shielding sleeve of nuclear main pump heat-insulation layer geometry schematic diagram.
Fig. 3 is rotor shielding sleeve of nuclear main pump clamping band geometry schematic diagram.
In figure: 1. rotor shielding sleeve, 2. heat-insulation layer, 3. clamping band.
Embodiment
Fig. 1,2,3 shows rotor shielding sleeve of nuclear main pump heat insulation layer structure device schematic diagram.Heat-insulation layer 2 adopt rotary machine process system, in the process of banding heat-insulation layer revolve between every layer from inside to outside 2 turn 90 degrees angle order follow the surface be adjacent at rotor rotor shielding sleeve 1, heat-insulation layer 2 number of plies can be selected between 1-20 layer according to actual condition.Heat-insulation layer 2 tighten is guaranteed seamless by last clamping band 3 shown in outermost Fig. 1.Clamping band 3 junction adopts screw to connect.The usage quantity of clamping band 3 can select 1-20 root according to actual condition.The assembling result of last reality as shown in Figure 1.After shrink-on terminates, clamping band 3 is unclamped heat-insulation layer order to unload.Heat-insulation layer 2 after unloading and clamping band 3 can give over to shrink-on next time.
Existing shrink-on technique adopts resistance heating heat-treatment furnace, and cross-ventilation heat exchange and heat-treatment furnace radiation heat transfer can compensate rotor shielding sleeve 1 temperature to be reduced and delay it and shrink and increase shrink-on effective time.The shrink-on time that this technique allows is very short, and the too early hoop failed success rate on rotor of rotor shielding sleeve 1 is extremely low, and easily produces bulge, fold, bently and that the produce unstability uneven due to temperature field fluctuation thermal stress distribution such as to bend.By rotor shielding sleeve 1 outer lock ring multi-layer heat preserving layer 2 can at shrink-on time control rotor shielding sleeve 1 by its heat transfer cooling rate extend the shrink-on time and use the material manufacture the same with rotor shielding sleeve 1 to form due to heat-insulation layer 2 and boot band 3, while expanded by heating, do not have the generation of thermal stress.Heat-insulation layer 2 can repeated removal assembling use operation is simple, reduce production cost, improve production efficiency.
Such as, the rotor shielding sleeve of AP1000 core main pump is the barrel-like structure of ultra-thin big L/D ratio, it is highly more than 3000.00mm, internal diameter is 550.00-560.00mm, diameter tolerance is ± 0.076mm, adopt the thick HastelloyC-276 latten of 0.38-0.70mm to form through cutting and welding procedure manufacture, its shrink-on difficulty is very large.Research shows, when not having heat-insulation layer, the housing shrink-on time that 0.50mm is thick should be less than 15s, if the shrink-on time is greater than 15s, then housing will prematurely banding on rotor, thus cause shrink-on failure.Outside the housing that 0.50mm is thick, three layers of HastelloyC-276 alloy heat-insulation layer that 1.50mm is thick altogether on hoop, carry out shrink-on engineer testing.Result shows, shrink-on required time has extended to 37s, and shrink-on time lengthening is more than 2 times.Visible, the shrink-on apparatus and method after improvement can extend the shrink-on time significantly, can improve the success rate of shrink-on significantly.
Claims (2)
1. one kind extends the device of rotor shielding sleeve of nuclear main pump shrink-on time, it is characterized in that: described device comprises the clamping band (3) of watt heat-insulation layer of shape structure (2) and list structure, the size range of described heat-insulation layer (2) is length 300-600mm, internal diameter is identical with rotor diameter, radian is pi/2, thickness 0.2-2mm, adopts the manufacture of HastelloyC-276 alloy, and the number of plies of heat-insulation layer (2) selects 1-20 layer according to reality suit operating mode; The size range of described boot band (3) is width 5-50mm, length 1000-2000mm, adopts the manufacture of HastelloyC-276 alloy, and the usage quantity of clamping band (3) selects 1-20 root according to actual condition.
2. a kind of method extending the rotor shielding sleeve of nuclear main pump shrink-on time according to claim 1, it is characterized in that: described method adopts boot band (3) lock ring multi-layer heat preserving layer (2), the banding process of described heat-insulation layer (2) refer to heat-insulation layer (2) from inside to outside every layer around an angle of 90 degrees that rotates in a circumferential direction, order is followed and is adjacent on rotor shielding sleeve (1), then guarantees gapless between every layer of heat-insulation layer (2) by boot band (2) at outermost applying hoop tightening force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510806952.7A CN105356688A (en) | 2015-11-22 | 2015-11-22 | Apparatus and method for prolonging time of heating assembling of rotor shielding sleeve of nuclear main pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510806952.7A CN105356688A (en) | 2015-11-22 | 2015-11-22 | Apparatus and method for prolonging time of heating assembling of rotor shielding sleeve of nuclear main pump |
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| Publication Number | Publication Date |
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| CN105356688A true CN105356688A (en) | 2016-02-24 |
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|---|---|---|---|
| CN201510806952.7A Pending CN105356688A (en) | 2015-11-22 | 2015-11-22 | Apparatus and method for prolonging time of heating assembling of rotor shielding sleeve of nuclear main pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109962585A (en) * | 2017-12-22 | 2019-07-02 | 佳木斯电机股份有限公司 | Major diameter rotor shielding sleeve loads process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2209754Y (en) * | 1995-01-25 | 1995-10-11 | 尚久駜 | Steel belt inforced coating thermal insulation pipe |
| CN101725560A (en) * | 2009-11-18 | 2010-06-09 | 大连理工大学 | Shrink-on equipment of housing of rotor of nuclear main pump |
| CN101812572A (en) * | 2010-04-03 | 2010-08-25 | 大连理工大学 | Vacuum heat expansion forming process of rotor shielding sleeve of nuclear main pump |
| 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 |
-
2015
- 2015-11-22 CN CN201510806952.7A patent/CN105356688A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2209754Y (en) * | 1995-01-25 | 1995-10-11 | 尚久駜 | Steel belt inforced coating thermal insulation pipe |
| CN101725560A (en) * | 2009-11-18 | 2010-06-09 | 大连理工大学 | Shrink-on equipment of housing of rotor of nuclear main pump |
| CN101812572A (en) * | 2010-04-03 | 2010-08-25 | 大连理工大学 | Vacuum heat expansion forming process of rotor shielding sleeve of nuclear main pump |
| 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 |
Non-Patent Citations (1)
| Title |
|---|
| 余国琮等: "《化学容器及设备》", 31 December 1980, 化学工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109962585A (en) * | 2017-12-22 | 2019-07-02 | 佳木斯电机股份有限公司 | Major diameter rotor shielding sleeve loads process |
| CN109962585B (en) * | 2017-12-22 | 2021-01-01 | 佳木斯电机股份有限公司 | Large-diameter rotor shielding sleeve pulling process method |
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Application publication date: 20160224 |