CN107086743B - Oil-lubricated main cooling fan motor of high-temperature gas cooled reactor nuclear power plant - Google Patents
Oil-lubricated main cooling fan motor of high-temperature gas cooled reactor nuclear power plant Download PDFInfo
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- CN107086743B CN107086743B CN201710363223.8A CN201710363223A CN107086743B CN 107086743 B CN107086743 B CN 107086743B CN 201710363223 A CN201710363223 A CN 201710363223A CN 107086743 B CN107086743 B CN 107086743B
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- 238000001816 cooling Methods 0.000 title claims abstract description 20
- 238000005461 lubrication Methods 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000003921 oil Substances 0.000 claims description 67
- 238000007789 sealing Methods 0.000 claims description 51
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 27
- 238000004804 winding Methods 0.000 claims description 26
- 230000000903 blocking effect Effects 0.000 claims description 22
- 238000007667 floating Methods 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 11
- 229910052802 copper Inorganic materials 0.000 claims description 11
- 239000010949 copper Substances 0.000 claims description 11
- 238000003825 pressing Methods 0.000 claims description 11
- 238000003466 welding Methods 0.000 claims description 9
- 238000009529 body temperature measurement Methods 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 8
- 239000003595 mist Substances 0.000 claims description 8
- 239000001307 helium Substances 0.000 claims description 7
- 229910052734 helium Inorganic materials 0.000 claims description 7
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 7
- 239000003973 paint Substances 0.000 claims description 7
- 238000010030 laminating Methods 0.000 claims description 6
- 239000011810 insulating material Substances 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 claims description 5
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 4
- 239000010687 lubricating oil Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 238000005728 strengthening Methods 0.000 claims description 4
- 238000009423 ventilation Methods 0.000 claims description 4
- 238000004080 punching Methods 0.000 claims description 3
- 241000555745 Sciuridae Species 0.000 claims description 2
- 238000010422 painting Methods 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 10
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000001050 lubricating effect Effects 0.000 abstract 1
- 239000002826 coolant Substances 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- XLYOFNOQVPJJNP-ZSJDYOACSA-N Heavy water Chemical compound [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000010923 batch production Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000011258 core-shell material Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
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- H02K17/165—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
- H02K5/124—Sealing of shafts
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at both ends of the rotor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
- H02K5/225—Terminal boxes or connection arrangements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/04—Balancing means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Motor Or Generator Frames (AREA)
Abstract
The invention relates to a motor for a main air cooler of an oil lubrication high-temperature gas cooled reactor nuclear power plant, which is key equipment in a nuclear power island of the high-temperature gas cooled reactor nuclear power plant and has a function similar to that of a main pump motor of a pressurized water reactor nuclear power plant. The upper guide thrust combined bearing and the lower guide bearing of the motor are respectively positioned at the upper end and the lower end of the motor stator, and the motor support is positioned below the motor. The invention changes the rule and the design idea of the conventional vertical motor in the structure that the thrust bearing is positioned below the guide bearing, improves the design technology of the vertical motor, develops the new design field of the high-speed vertical motor, and develops the pioneer of the high-speed vertical motor with a rare lubricating sliding bearing structure. The invention proves that the thin oil lubricated sliding bearing can be used in the large vertical high-speed motor, the design technology of the vertical motor is improved, the new design field of the high-speed vertical motor is developed, and the pioneer of using the thin oil lubricated sliding bearing in the large vertical high-speed vertical motor is developed. The invention is suitable for a high-power vertical high-speed motor, and is particularly suitable for a main cooling fan motor of a high-temperature gas cooled reactor nuclear power station.
Description
Technical Field
The invention relates to a motor for a main air cooler of a nuclear power plant of an oil lubrication high-temperature gas cooled reactor.
Background
The conventional nuclear power plant adopts liquid (water, heavy water or light water) as a coolant, a coolant pump is driven by a power frequency vertical asynchronous motor, and the rotating speed of the motor is more than 1500rpm (50 Hz power frequency power supply) or 1800rpm (60 Hz power frequency power supply). The rotating speed of the power frequency vertical asynchronous motor is not changed and is not high, the technical difficulty is small, and the production and the manufacture are easy.
The high-temperature gas cooled reactor nuclear power station with higher safety adopts helium as a main coolant of a reactor, and the helium is circulated by a fan unit to exchange heat. The prior high-temperature gas cooled reactor belongs to the test property, the reactor power is low, the power of a fan motor of a helium compressor is low, the rotating speed is low, and the high-temperature gas cooled reactor can not meet the requirement of a high-power commercial reactor. For a high-power vertical high-speed motor, the bearing adopts an expensive electromagnetic bearing, and although the requirement of high rotating speed can be met, the bearing has high price, short service life and difficult installation and maintenance and is not suitable for batch production.
Disclosure of Invention
The invention aims to provide the oil lubrication main cooling fan motor of the nuclear power plant of the high-temperature gas-cooled reactor, which has the advantages of high rotating speed, stable operation, high safety and low manufacturing cost, and is suitable for the oil lubrication main cooling fan motor of the nuclear power plant of the high-temperature gas-cooled reactor with higher dragging safety. The technical scheme of the invention is as follows:
a main cooling fan motor of an oil lubrication high-temperature gas cooled reactor nuclear power plant is characterized in that a stator (5) is installed on a motor support (1), an upper guide thrust combined bearing (19) and a lower guide bearing (2) are installed at the upper end and the lower end of the stator (5) respectively, a rotor (11) is supported by the upper guide thrust combined bearing (19) and the lower guide bearing (2) and is located in the center of a stator iron core (10), a stator outlet box (38) and an auxiliary outlet box (39) are installed on the side face of the stator (5), the stator (5) comprises a stator base (46), a stator iron core (10) and stator windings (16), the stator iron core (10) is located inside the stator base (46), the stator windings (15) are embedded into slots of the stator iron core (10), the stator base (46) is mainly formed by welding steel plates, a plurality of rib plates are arranged in the stator base to improve the rigidity and the strength of the base, the stator iron core (10) is formed by laminating stator laminations coated with insulating varnish, the stator iron core (10) is fastened between two end pressing plates of a stator core shell, radial ventilation grooves (6) are distributed on the stator iron core (10), two end pressing plates of an excircle of the stator core (7), and two stator iron core (7) are welded into a stator core, and two stator iron core (17) and are fixed on the stator core (7), the end hoop (17) is made by wrapping insulating materials according to insulation specifications after welding stainless steel materials, the end part of each coil (48) is bound with the end hoop, after being soaked in insulating paint and dried, the coil has high strength, two sides of a stator (5) are respectively provided with a water cooler (8) and an air cooler (8) for cooling hot air blown out from the interior of the motor, the side surface of a stator frame (46) is provided with a stator outlet box (38) for connecting a stator winding lead and a power cable, the side surface of the frame (46) is provided with an auxiliary junction box (39) for connecting the leads of stator temperature measurement, bearing temperature measurement and vibration measurement elements, a rotor core (9) is completely composed of a whole circle silicon steel sheet insulated by painting, the rotor core (9) and a shaft (45) are sleeved together in an interference fit mode, an arc key (37) is axially fixed with a safety ring (36), the torque of the motor is transmitted through the heat sleeving tightness between the rotor core (9) and the shaft (45), a squirrel-cage winding is composed of a copper bar (12) and an end ring (14), the copper bar (12) is arranged in a rotor winding groove, the rotor winding is welded with the high-strength steel end ring (14), and the rotor ring (14) is manufactured by pressing and the high-strength steel ring (14). Two ends of the rotor iron core (9) are respectively provided with a balance disc (35) for placing balance blocks when the rotor is in dynamic balance.
A circular thrust pad (30) in the upper guide thrust combined bearing (19) is positioned above a self-aligning fan-shaped guide bearing bush (33), the circular thrust pad (30) and the self-aligning fan-shaped guide bearing bush (33) are arranged in an upper guide thrust bearing shell (22), and a thrust sliding rotor (29) and a shaft (45) are concentric by adopting smaller tight fit; an upper guide bearing sealing ring (21) is adopted between the oil retaining pipe (20) and the thrust sliding rotor (29) for sealing, and the upper guide bearing sealing ring (21) is arranged on the oil retaining pipe (20) and has enough radial clearance; the upper guide bearing sealing ring (21) is embedded in a groove on the oil blocking pipe (20) and is fixed on the oil blocking pipe (20) by a positioning pin (32), and the positioning pin (32) can prevent the sealing ring from rotating along with the shaft; a first floating seal (28) and a second floating seal (34) are respectively arranged at the upper end and the lower end of the bearing and used for preventing oil mist in a bearing oil tank from leaking to the outside, and the thrust bearing and the upper guide bearing are lubricated through a lubricating oil pipeline (31) and an oil discharge pipeline (18).
The lower guide bearing seat (41) is arranged on a stator base (46) through a lower guide bearing end cover (42), a lower guide shoe block (25) is arranged in the lower guide bearing seat (41), the structure between a lower guide bearing oil blocking pipe (27) and a sliding rotor (23) is the same as that of an upper guide thrust combined bearing (19), a lower guide bearing sealing ring (26) is adopted for sealing, the lower guide bearing sealing ring (26) is embedded in a groove on the lower guide bearing oil blocking pipe (27), a lower sealing ring positioning pin (24) is adopted to be fixed on the oil blocking pipe, the lower sealing ring positioning pin (24) can prevent the sealing rings from rotating along with the shaft, and the upper and lower sealing rings are designed to be the same size and can be used interchangeably for convenience of maintenance; the upper end and the lower end of the lower guide bearing are respectively provided with a third floating seal (40) and a fourth floating seal (44) which are used for preventing oil mist in a bearing oil tank from leaking to the outside, and the lower guide bearing (41) finishes lubrication and cooling through a lower guide bearing oil inlet pipeline (3) and a lower guide bearing oil outlet pipeline (4).
Motor support (1) is located motor body's below, be used for supporting whole motor body and be connected with helium fan (47) of below, motor support (1) mainly is formed by the steel sheet welding, adopt bilayer structure for improving, set up the multichannel strengthening rib between inside and outside two-layer curb plate, stator frame (46) are square structure, fan frame (49) are circular structure, the interface that motor support (1) and stator frame (46) are connected is square structure, motor support (1) is circular structure with the interface of fan frame (49).
The motor stator comprises a base, a stator core and a stator winding, wherein the stator core is positioned inside the base, and the stator winding is embedded into a stator core slot. The machine base is mainly formed by welding steel plates, a plurality of rib plates are arranged in the machine base to improve the rigidity and the strength of the machine base, a stator core is formed by laminating stator punching sheets coated with insulating paint, the stator core is tightly fixed between two end pressing plates of a shell of the stator machine base, a plurality of radial ventilation channels are distributed on the stator core, axial ribs welded on the surface of the outer circle of the stator core enable the stator to have enough rigidity, the stator core is tightly pressed by a laminating method taking the inner diameter of the machine base as the reference, then an iron core upper pressing plate is installed, then the iron core upper pressing plate is tightly pressed and welded, the outer circle of the stator core and the axial ribs are also welded into a whole, so that the stator has enough rigidity, two end hoops are respectively arranged at two ends of a stator winding to fix the end part of the winding, the end hoops are made of insulating materials according to the insulation specification after being welded by stainless steel materials, and the end part of each coil is bound with the end hoops, after the impregnated insulating paint is dried, the high-strength squirrel-cage rotor has high strength, two sides of a stator are respectively provided with a water cooler and an air cooler for cooling hot air blown out from the interior of a motor, the side surface of a machine base is provided with a stator wire outlet box for connecting a stator winding lead and a power cable, the side surface of the machine base is provided with an auxiliary junction box for connecting leads of stator temperature measurement, bearing temperature measurement and vibration measurement elements, a rotor core is completely composed of a painted and insulated full-circle silicon steel sheet, the rotor core and a shaft are sleeved together in an interference fit manner and are fixed with a safety ring in the axial direction by using an arc key, the torque of the motor is transmitted by the heat tightening amount between the rotor core and the shaft, a squirrel-cage winding is composed of a copper bar and an end ring, the copper bar is arranged in a groove of the rotor core, the copper bar and the end ring are welded together, and a protective ring made of high-strength non-magnetic steel is pressed on the excircle of the end ring of the rotor winding. Two ends of the rotor iron core are respectively provided with a balance disc for placing a balance block when the rotor is in dynamic balance.
The circular thrust pad block in the upper guide thrust combined bearing is positioned above the self-aligning fan-shaped guide bearing bush, the circular thrust pad block and the self-aligning fan-shaped guide bearing bush are arranged in an upper guide thrust bearing shell, and the thrust sliding rotor and the shaft are ensured to be concentric by adopting smaller tight fit; an upper guide bearing sealing ring is adopted between the oil blocking pipe and the thrust sliding rotor for sealing, and the upper guide bearing sealing ring is arranged on the oil blocking pipe and has enough radial clearance; the upper guide bearing sealing ring is embedded in a groove on the oil blocking pipe and is fixed on the oil blocking pipe by a positioning pin, and the positioning pin can prevent the sealing ring from rotating along with the shaft; the upper end and the lower end of the bearing are respectively provided with a first floating seal and a second floating seal for preventing oil mist in a bearing oil tank from leaking to the outside, and the thrust bearing and the upper guide bearing are lubricated through a lubricating oil pipeline and an oil discharge pipeline.
The lower guide bearing seat is arranged on the stator base through a lower guide bearing end cover, the lower guide shoe block is arranged in the lower guide bearing seat, the structure between an oil blocking pipe and a sliding rotor of the lower guide bearing is the same as that of an upper guide thrust combined bearing, the lower guide bearing sealing ring is used for sealing, the lower guide bearing sealing ring is embedded in a groove on the oil blocking pipe of the lower guide bearing, a lower sealing ring positioning pin is used for fixing on the oil blocking pipe, the lower sealing ring positioning pin can prevent the sealing ring from rotating along with the shaft, and for convenience in maintenance, the upper sealing ring and the lower sealing ring are designed to be the same in size and can be used interchangeably; the upper end and the lower end of the lower guide bearing are respectively provided with a third floating seal and a fourth floating seal for preventing oil mist in a bearing oil tank from leaking to the outside, and the lower guide bearing finishes lubrication and cooling through an oil inlet pipeline of the lower guide bearing and an oil outlet pipeline of the lower guide bearing.
The motor support is located the below of motor body for support whole motor body and be connected with the main helium fan of below, the motor support mainly forms by the steel sheet welding, adopts bilayer structure for improving, sets up the multichannel strengthening rib between inside and outside two-layer curb plate, and the stator frame is square structure, and the fan frame is circular structure, and the interface that motor support and stator frame are connected is square structure, and the interface of motor support and fan frame is circular structure.
The motor for the main air cooler of the high-temperature gas-cooled reactor nuclear power plant is key equipment in a nuclear power island of the high-temperature gas-cooled reactor nuclear power plant, and has a function similar to that of a main pump motor of a pressurized water reactor nuclear power plant. In order to improve the critical rotating speed of the motor, the position of the upper guide bearing is designed below the thrust bearing, the structure is never used in the prior design, the actual operation proves that the structure effectively improves the critical rotating speed of the motor, and the first-order critical rotating speed of the motor is larger than 5200rpm through calculation, so that the motor vibrates stably in the range of 800-4200 r/min working rotating speed, and the operation safety is improved. The oil leakage and atomization of the upper bearing chamber are eliminated by optimizing the design of the upper bearing sealing ring and the air seal design, the motor runs stably, the maximum vibration speed of the upper frame of the motor is 0.45mm/s within the working rotating speed range, and the amplitude of the rotor is 79 microns. The invention proves that the thin oil lubricated sliding bearing can be used in the large vertical high-speed motor, the design technology of the vertical motor is improved, the new design field of the high-speed vertical motor is developed, and the pioneer that the large vertical high-speed vertical motor uses the thin oil lubricated sliding bearing is developed. The invention is suitable for a high-power vertical high-speed motor, and is particularly suitable for a main cooling fan motor of a nuclear power station of a high-temperature gas-cooled reactor.
The main cooling fan motor of the high-temperature gas cooled reactor nuclear power station solves the problems that the vibration of the vertical high-speed motor is influenced due to low first-order critical rotating speed and a sliding bearing is lubricated by using thin oil, solves the problems of oil leakage and oil atomization of a bearing chamber on the motor, and has small running vibration and stable performance. The invention opens up a new field of high-speed vertical motors.
Drawings
FIG. 1 shows a main cooling fan motor of a nuclear power plant of an oil-lubricated high-temperature gas-cooled reactor of the present invention
FIG. 2 is a view showing a combined thrust bearing for a motor according to the present invention
FIG. 3 is a view showing a combined thrust bearing for a motor according to the present invention
Detailed Description
As shown in fig. 1, the main cooling fan motor of the oil-lubricated high-temperature gas-cooled reactor nuclear power plant is composed of a stator 5, a rotor 11, an upper guide thrust combination bearing 19, a lower guide bearing 43, a cooler 8, a motor support 1, a stator outlet box 38, an auxiliary outlet box 39 and other main components. The motor model is YLH4500-2, the rated power is 4500kW, the rated voltage is 6.0kV, the rated current is 515A, the rated rotating speed is 4000r/min, the working rotating speed range is 800-4200 r/min,3 phases and the insulation grade is H.
The motor stator 5 comprises a stator base 46, a stator core 10 and a stator winding 16, wherein the stator core 10 is positioned inside the stator base 46, a stator winding 15 is embedded into a groove of the stator core 10, the stator base 46 is mainly formed by welding steel plates, a plurality of rib plates are arranged in the stator base 46 to improve the rigidity and the strength of the base, the stator core 10 is formed by laminating stator punching sheets coated with insulating paint, the stator core 10 is tightly fixed between two end pressing plates of a shell of the stator base, a plurality of radial ventilation channels 6 are distributed on the stator core 10, an axial rib 7 welded on the surface of the outer circle of the stator core 10 enables the stator to have enough rigidity, the stator core is compacted by adopting a laminating method taking the inner diameter of the base as a reference, an upper iron core pressing plate 13 is installed, then the stator core pressing and welding are carried out, the outer circle of the stator core and the axial rib are also welded into a whole, so that the stator has enough rigidity, two ends of a stator winding 16 are respectively provided with two end hoops 17 for fixing the winding end, the end hoops 17 are made of stainless steel materials which are welded and then bound with insulating materials according to insulating specifications, the end part of each coil 48 is bound with the end hoops, after being dried by impregnating insulating paint, the coil has high strength, two sides of a stator base 46 are respectively provided with a water cooler 8 and an air cooler 8 for cooling hot air blown out from the interior of the motor, the side surface of the stator base 46 is provided with a stator outlet box 38 for connecting a stator winding lead and a power cable, the side surface of the stator base 46 is provided with an auxiliary junction box 39 for connecting leads of stator temperature measurement, bearing temperature measurement and vibration measurement elements, a rotor core 9 is completely composed of painted and insulated full-circle silicon steel sheets, the rotor core 9 and a shaft 46 are sleeved together in an interference fit mode, an arc key 37 is axially used for fixing with a safety ring 36, the torque of the motor is transmitted through the heat sleeving tightness between the rotor core 9 and the shaft, the squirrel cage winding is formed by copper bars 12 and end rings 14, the copper bars 12 are arranged in the grooves of the rotor iron core 9, the copper bars 12 and the end rings 14 are welded together, and a protective ring 15 made of high-strength non-magnetic steel is pressed on the excircle of the rotor winding end ring 14. And a balance disc 35 is respectively arranged at two ends of the rotor iron core 9 and used for placing balance blocks when the rotor is in dynamic balance.
The circular thrust pad 30 in the upper guide thrust combined bearing 19 is positioned above the self-aligning fan-shaped guide bearing bush 33, the circular thrust pad 30 and the self-aligning fan-shaped guide bearing bush 33 are arranged in the upper guide thrust bearing shell 22, and the thrust sliding rotor 29 and the shaft 45 are concentric by adopting smaller tight fit; an upper guide bearing sealing ring 21 is adopted between the oil retaining pipe 20 and the thrust sliding rotor 29 for sealing, and the upper guide bearing sealing ring 21 is arranged on the oil retaining pipe 20 and has enough radial clearance; the upper guide bearing sealing ring 21 is embedded in a groove on the oil blocking pipe 20 and is fixed on the oil blocking pipe 20 by a positioning pin 32, and the positioning pin 32 can prevent the sealing ring from rotating along with the shaft; the upper and lower ends of the bearing are respectively provided with a first floating seal 28 and a second floating seal 34 for preventing oil mist in the oil tank of the bearing from leaking to the outside, and the thrust bearing and the upper guide bearing are lubricated by a lubricating oil pipeline 31 and an oil discharge pipeline 18, which is shown in a specific form in fig. 2.
The lower guide bearing 41 is installed on a stator base 46 through a lower guide bearing end cover 42, a lower guide shoe block 25 is installed in a lower guide bearing seat 2, the structure between a lower guide bearing oil blocking pipe 27 and a sliding rotor 23 is the same as that of an upper guide thrust combined bearing 19, a lower guide bearing sealing ring 26 is adopted for sealing, the lower guide bearing sealing ring 26 is embedded in a groove on the lower guide bearing oil blocking pipe 27, a lower sealing ring positioning pin 24 is adopted for fixing on the oil blocking pipe, the lower sealing ring positioning pin 24 can prevent the sealing rings from rotating along with the shaft, for the convenience of maintenance, the upper sealing ring and the lower sealing ring are designed to be the same size and can be used interchangeably; the upper end and the lower end of the lower guide bearing are respectively provided with a third floating seal 40 and a fourth floating seal 44 for preventing oil mist in a bearing oil tank from leaking to the outside, and the lower guide bearing 2 finishes lubrication and cooling through a lower guide bearing oil inlet pipeline 3 and a lower guide bearing oil outlet pipeline 4, and the specific form is shown in fig. 3.
Claims (2)
1. A main cooling fan motor of an oil lubrication high-temperature gas cooled reactor nuclear power plant is characterized in that: the stator (5) is arranged on a motor support (1), the upper end and the lower end of the stator (5) are respectively provided with an upper guide thrust combined bearing (19) and a lower guide bearing (2), a rotor (11) is supported by the upper guide thrust combined bearing (19) and the lower guide bearing (2) and is positioned in the center of a stator iron core (10), a stator outlet box (38) and an auxiliary junction box (39) are arranged on the side surface of the stator (5), the stator (5) comprises a stator base (46), the stator iron core (10) and a stator winding (16), the stator iron core (10) is positioned in the stator base (46), the stator winding (16) is embedded into a stator iron core (10) groove, the stator base (46) is welded by steel plates, and a plurality of rib plates are arranged in the stator base to improve the rigidity and the strength of the base, the stator core (10) is formed by laminating stator punching sheets coated with insulating paint, the stator core (10) is fastened between two end pressing plates of a stator base shell, a plurality of radial ventilation grooves (6) are distributed on the stator core (10), axial ribs (7) welded on the surface of the excircle of the stator core (10) enable the stator to have enough rigidity, the stator core is compressed by an iron core upper pressing plate (13) and welds the excircle of the stator core and the axial ribs into a whole, two ends of a stator winding (16) are respectively provided with two end hoops (17) to fix the end parts of the winding, the end hoops (17) are made of insulating materials by wrapping the insulating materials according to the insulating specification after being welded by stainless steel materials, the end of each coil (48) is bound with an end hoop, after being impregnated with insulating paint and dried, the coil has high strength, two sides of a stator (5) are respectively provided with a water and air cooler (8) for cooling hot air blown out from the inside of the motor, the side surface of a stator frame (46) is provided with a stator outlet box (38) for connecting a stator winding lead and a power cable, the side surface of the stator frame (46) is provided with an auxiliary junction box (39) for connecting leads of stator temperature measurement, bearing temperature measurement and vibration measurement elements, a rotor iron core (9) is completely composed of a whole circular silicon steel sheet insulated by painting, the rotor iron core (9) and a shaft (45) are sleeved together in an interference fit manner, an arc key (37) is axially fixed with a safety ring (36), the torque of the motor is transmitted by the heat sleeving tight amount between the rotor iron core (9) and the shaft (45), a squirrel cage winding is composed of a copper bar (12) and an end ring (14), the copper bar (12) is arranged in a groove of the rotor iron core (9), the copper bar (12) and the end ring (14) are welded together, the rotor end ring (15) is arranged outside a rotor iron core (9) in a balance coil, and a rotor coil is arranged on a rotor coil (35) when the rotor iron core (14) in a balance way, the rotor coil; a circular thrust pad (30) in the upper guide thrust combined bearing (19) is positioned above a self-aligning fan-shaped guide bearing bush (33), the circular thrust pad (30) and the self-aligning fan-shaped guide bearing bush (33) are arranged in an upper guide thrust bearing shell (22), and a thrust sliding rotor (29) and a shaft (45) are concentric by adopting smaller tight fit; an upper guide bearing sealing ring (21) is adopted between the oil retaining pipe (20) and the thrust sliding rotor (29) for sealing, and the upper guide bearing sealing ring (21) is arranged on the oil retaining pipe (20) and has enough radial clearance; the upper guide bearing sealing ring (21) is embedded in a groove on the oil blocking pipe (20) and is fixed on the oil blocking pipe (20) by a positioning pin (32), and the positioning pin (32) can prevent the sealing ring from rotating along with a shaft; the upper end and the lower end of the bearing are respectively provided with a first floating seal (28) and a second floating seal (34) which are used for preventing oil mist in a bearing oil tank from leaking to the outside, and the thrust bearing and the upper guide bearing are lubricated through a lubricating oil pipeline (31) and an oil discharge pipeline (18); the lower guide bearing seat (41) is installed on a stator base (46) through a lower guide bearing end cover (42), a lower guide shoe block (25) is installed in the lower guide bearing seat (41), an oil blocking pipe (20) of a lower guide bearing and a sliding rotor (23) have the same structure as an upper guide thrust combined bearing (19), a lower guide bearing sealing ring (26) is adopted for sealing, the lower guide bearing sealing ring (26) is embedded in a groove in an oil blocking pipe (27) of the lower guide bearing, a lower sealing ring positioning pin (24) is adopted to be fixed on the oil blocking pipe, and the lower sealing ring positioning pin (24) can prevent the sealing rings from rotating along with a shaft, so that the upper and lower sealing rings are designed to be the same size and are used interchangeably for convenience of maintenance; the upper end and the lower end of the lower guide bearing are respectively provided with a third floating seal (40) and a fourth floating seal (44) which are used for preventing oil mist in a bearing oil tank from leaking to the outside, and a lower guide bearing seat (41) finishes lubrication and cooling through a lower guide bearing oil inlet pipeline (3) and a lower guide bearing oil outlet pipeline (4).
2. The main cooling fan motor of an oil-lubricated high-temperature gas-cooled reactor nuclear power plant as claimed in claim 1, wherein: motor support (1) is located motor body's below, be used for supporting whole motor body and be connected with helium fan (47) of below, motor support (1), the steel sheet welding forms, adopt bilayer structure for improving, set up the multichannel strengthening rib between inside and outside two-layer curb plate, stator frame (46) are square structure, fan frame (43) are circular structure, the interface that motor support (1) and stator frame (46) are connected is square structure, motor support (1) is circular structure with the interface of fan frame (43).
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| CN201710363223.8A CN107086743B (en) | 2017-05-22 | 2017-05-22 | Oil-lubricated main cooling fan motor of high-temperature gas cooled reactor nuclear power plant |
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| CN201710363223.8A CN107086743B (en) | 2017-05-22 | 2017-05-22 | Oil-lubricated main cooling fan motor of high-temperature gas cooled reactor nuclear power plant |
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| CN107086743B true CN107086743B (en) | 2023-03-28 |
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| JP6925959B2 (en) * | 2017-12-26 | 2021-08-25 | 株式会社東芝 | Shaft sealing device and rotary electric machine |
| CN108390495B (en) * | 2018-05-14 | 2023-12-01 | 哈尔滨电气动力装备有限公司 | Projecting type upper rack structure |
| CN111412160B (en) * | 2020-04-28 | 2024-12-20 | 宁波狮球通风机电有限公司 | A high protection grade fan |
| CN111799930A (en) * | 2020-07-16 | 2020-10-20 | 佳木斯电机股份有限公司 | Arrangement structure for lead cable of main helium fan |
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