CN2612145Y - Semi-shielded forced circulation pump motor - Google Patents
Semi-shielded forced circulation pump motor Download PDFInfo
- Publication number
- CN2612145Y CN2612145Y CN 02295277 CN02295277U CN2612145Y CN 2612145 Y CN2612145 Y CN 2612145Y CN 02295277 CN02295277 CN 02295277 CN 02295277 U CN02295277 U CN 02295277U CN 2612145 Y CN2612145 Y CN 2612145Y
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- stator
- motor
- winding
- circulation pump
- forced circulation
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- Expired - Fee Related
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- Motor Or Generator Frames (AREA)
Abstract
A semi-shield force circulation pump motor belongs to three-phase cage asynchronous motor, mainly used fire power plant, engaged with forced circulation boiler, to drive the pump to circulate the high-temperature high-pressure water of boiler. The utility model has same structure of prior wet winding motor, characterized in that the stator winding uses a shield structure, while a motor base, an upper baffle plate, a lower baffle plate, and a stator shield casing form a bearing sealing structure to cover the stator winding, to be insulated form boiler water, therefore, the winding is not limited by the waterproof and sealing functions of electromagnetic line and connector, and the winding and stator iron core are not corroded and polluted by the boiler water, the motor base is not corroded, to improve the service life and reliability of motor winding, reduce accident, reduce maintenance, and reduce maintenance cost.
Description
Technical field: half screen covers the forced circulation pump motor, belongs to three-phase squirrel-cage induction motor, and it is mainly used in thermal power station and matches with the forced circulation type boiler, and pump device makes the circulation of boiler high temperature water under high pressure.
Background technology: present existing utility boiler mainly contains two kinds with wet stator forced circulation pump motor: a kind of 6000V of being, and 200kW, the wet type motor of 4 utmost points mainly is used in the thermal power station of 300MW; Another kind is 3000V, 350kW, and the wet type motor of 4 utmost points mainly is used in the thermal power station of 600MW.More than the stator winding of each forced circulation pump motor be threading type, whole winding is immersed in the boiler water, each electrical connector is waterproof and sealing, winding conducting wire adopts special waterproof electromagnetic wire.The pressure-bearing boundary of motor mainly is the shell (comprising heat shield, electric machine stand, thrust metal) of motor, therefore, insulation and seal request to motor windings are higher, motor windings is subjected to the waterproof of electromagnetic wire, joint and the restriction of sealing effectiveness, make winding and iron core etc. be subjected to the erosion and the pollution of high pressure boiler water, cause problems such as insulation resistance decline, electric machine stand corrosion.
Summary of the invention: the half screen of this type utility model covers the forced circulation pump motor, as shown in Figure 1, identical with the composition structure of existing wet-wound group motor, all partly form by rotor, stator, electric machine stand, thrust bearing, guide bearing, heat shield, cooling system, sealing system, outlet box etc.The characteristic feature that half screen covers the forced circulation pump motor is that stator winding 10 adopts shielding construction, form the bearing structure of sealing by electric machine stand 3, upper spacer 2, lower clapboard 7, stator can 9, the stator winding ladle cover is got up, isolate, under the dry type state, move with boiler water.Stator winding is the rule formula, and winding adopts formed coil, and each electrical connector is common insulated type, does not possess water-proof function.Overall vacuum dipping lacquer and end encapsulating were handled after stator winding rolled off the production line, and had improved the radiating effect of insulation life and winding overhang.Motor forms the twice pressure-bearing boundary, and the first road pressure-bearing boundary is bore of stator (comprising stator can 9, lower support tube 8, upper support tube 11, upper spacer 2, lower clapboard 7, stator core 4); The second road pressure-bearing boundary is the shell (comprising heat shield 1, electric machine stand 3, thrust metal 6) of motor.Half screen of the present invention covers the thermal endurance class that the forced circulation pump motor has improved motor windings, brings up to 115 ℃ by original 60 ℃; After motor windings adopted formed coil, each phase D.C. resistance deviation diminished, and three-phase equilibrium is better; After motor windings and boiler water were isolated, winding no longer was subjected to the waterproof of electromagnetic wire, joint and the restriction of sealing effectiveness, and simultaneously, winding and stator core are not subjected to the corrosion and the pollution of boiler water, and electric machine stand can not produce corrosion yet.More than these characteristics all will improve the useful life and the reliability of the heart-winding of motor greatly, shorten failure rate greatly, reduce the shutdown loss and the maintenance load in power station, reduce equipment maintenance cost.
Description of drawings: Fig. 1 half screen covers forced circulation pump electric motor structure and principle
Fig. 2 stator core flute profile, slot wedge structure
Among the figure: 1 heat shield, 2 upper spacers, 3 electric machine stands, 4 stator cores, 5 rotor cores
6 thrust metals, 7 lower clapboards, 8 lower support tubes, 9 stator cans
10 stator winding, 11 upper support tubes, 12 major trough wedges, 13 secondary slot wedges
Specific embodiments:
1. to cover the forced circulation pump motor identical with the composition structure of existing wet stator circulating pump motor for half screen, as shown in Figure 1, its stator shielding is to increase a stator can 9 between stator core 4 and rotor core 5, between electric machine stand 3 and heat shield 1, thrust metal 6, each increases a upper spacer 2 and a lower clapboard 7, form the bearing structure of sealing, the stator winding ladle cover is got up, isolate with boiler water.
2. stator slot shape adopts open slot, as shown in Figure 2, major trough wedge 12 and secondary slot wedge 13 are arranged in the groove, it is trapezoidal that notch shape is, notch adopts supporting form-cushioning metal or nonmetal or the two synthetic of reinforcement, and the weak link notch of stator core is reinforced, and enables the enabling capabilities that provides enough, guarantee function of shielding
3. stator can 9 is supported by the circumference of stator core 4 and lower support tube 8 and upper support tube 11, and to improve the fail safe and the stability of housing, the two ends of stator can are welded on respectively on the upper and lower dividing plate.
4. the cooling system of motor adopts three cooling branch roads, the water-cooled branch road of heat shield, the water-cooled branch road of electric machine stand outer wall and with motor internal cooling branch road, it comprises the water-hydrothermal exchange branch road of motor cavity chamber, HP cooler, filter.
5. the upper and lower support tube of motor can be processed into separately, also can make one with upper spacer, lower clapboard respectively.
Claims (6)
1. the half screen structure of covering forced circulation pump motor and existing wet-wound group motor is formed identical, partly form by rotor, stator, electric machine stand, thrust bearing, guide bearing, heat shield, cooling system, sealing system, outlet box etc., it is characterized in that stator winding adopts shielding construction, form the bearing structure of sealing by electric machine stand, upper spacer, lower clapboard, stator can, the stator winding ladle cover is got up, isolate with boiler water, stator slot shape adopts open slot, major trough wedge and secondary slot wedge are arranged in the groove, and it is trapezoidal that notch shape is.
2. half screen according to claim 1 covers the stator winding of forced circulation pump motor, it is characterized in that being the rule formula, winding adopts formed coil, and each electrical connector is common insulation, do not possess water-proof function, overall vacuum dipping lacquer and end encapsulating were handled after stator winding rolled off the production line.
3. half screen according to claim 1 covers the stator can of forced circulation pump motor, it is characterized in that being supported by the circumference of stator core and upper support tube and lower support tube, and its two ends are welded on respectively on the upper and lower dividing plate.
4. half screen according to claim 1 covers the cooling system of forced circulation pump motor, it is characterized in that adopting three cooling branch roads, the water-cooled branch road of heat shield, the water-cooled branch road of electric machine stand outer wall and motor internal cooling branch road, it comprises the water-hydrothermal exchange branch road of motor cavity chamber, HP cooler, filter.
5. half screen according to claim 1 covers the upper and lower support tube of forced circulation pump motor, it is characterized in that and can be processed into separately, also can make one with upper spacer, lower clapboard respectively.
6. half screen according to claim 1 covers the notch of forced circulation pump motor, it is characterized in that adopting supporting form-cushioning metal or nonmetal or the two synthetic of reinforcement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02295277 CN2612145Y (en) | 2002-12-30 | 2002-12-30 | Semi-shielded forced circulation pump motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02295277 CN2612145Y (en) | 2002-12-30 | 2002-12-30 | Semi-shielded forced circulation pump motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2612145Y true CN2612145Y (en) | 2004-04-14 |
Family
ID=34152122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02295277 Expired - Fee Related CN2612145Y (en) | 2002-12-30 | 2002-12-30 | Semi-shielded forced circulation pump motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2612145Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860146A (en) * | 2004-12-10 | 2010-10-13 | 胜达因公司 | The inner driver that is used for magnetic drive pump |
| CN103236753A (en) * | 2013-05-09 | 2013-08-07 | 东华大学 | Dry type switched reluctance motor based on sealed structure |
-
2002
- 2002-12-30 CN CN 02295277 patent/CN2612145Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860146A (en) * | 2004-12-10 | 2010-10-13 | 胜达因公司 | The inner driver that is used for magnetic drive pump |
| CN101860146B (en) * | 2004-12-10 | 2013-12-04 | 胜达因公司 | Inner drive for magnetic drive pump |
| CN103236753A (en) * | 2013-05-09 | 2013-08-07 | 东华大学 | Dry type switched reluctance motor based on sealed structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040414 Termination date: 20101230 |