CN2550948Y - Furnace water pump motor for changing high voltage into low voltage - Google Patents
Furnace water pump motor for changing high voltage into low voltage Download PDFInfo
- Publication number
- CN2550948Y CN2550948Y CN 02262953 CN02262953U CN2550948Y CN 2550948 Y CN2550948 Y CN 2550948Y CN 02262953 CN02262953 CN 02262953 CN 02262953 U CN02262953 U CN 02262953U CN 2550948 Y CN2550948 Y CN 2550948Y
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- Prior art keywords
- motor
- cooling water
- iron core
- boiler
- winding
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- Expired - Fee Related
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Abstract
The utility model relates to a motor used on boiler water pumps, in particular to a low voltage motor applicable to forced circulation boiler pumps in power plants, which comprises a wet stator, a rotor and a casing; wherein, the wet stator comprises an iron core and a plurality of windings; a passage component for cooling water to pass through is arranged at the bottom of each slot of the iron core, thus the flow quantity of the cooling water passing through the motor is increased, the resistance of cooling water flow is reduced and the circulation of the cooling water is improved; at the same time, the heat transmitted into the motor by the high temperature water in boilers through the pump head of the boiler pump and the casing of the motor is insulated; therefore, the utility model has the advantages of lowering the working temperature of the motor and prolonging the service life of the windings by at least two times.
Description
Affiliated technical field
The utility model relates to a kind of wet stator boiler pump motor, is specially adapted to the low-voltage motor of power plant forced circulation boiler water pump.
Background technology
The stove water pump is the key equipment of the normal operation of big power station's forced circulation boiler.The stove water pump is hung vertically in side in the pressure piping system of boiler usually, its water pump and motor are Construction integration up and down, because the stove water pump is participated in the boiler water cycle of HTHP directly, motor stator comprises that iron core and winding can raise rapidly because of the rising of pump temperature, add the heat that other power consumption produces, very easily cause the gel of winding insulation layer, distortion, damage.In order to improve the condition of work of boiler pump motor, present known boiler pump motor adopts the wet stator motor that does not have the axle envelope usually, promptly utilize the flowing water space, machine chamber of HP cooler, cooling water pipe and motor to be connected to form circulating cooling system, walk the heat of motor stator winding by the cooling water tape loop.Owing to be provided with stator core, winding and rotor in the motor cavity, the space that can allow cooling water pass through is considerably less, in the prior art, adopt high pressure to change low pressure minimizing umber of turn and change winding lap wound mode and increase the flowing water space, adopt small impeller to increase the mode of flowing water pressure, improve cooling effect, normally move to keep the stove water pump.But, in the prior art, in the motor between iron core and the casing, between the winding and can be few and minimum between stator and the rotor by the space of cooling water, and all be positioned at the winding slot of core inboard, when cooling water passes through motor internal, iron core can not fully be cooled off as main heat conductor, and at the position that does not have the space such as winding overhang, winding and iron core contact site still can produce high temperature more than 150 ℃, thereby quicken winding wire gel distortion, cause the useful life of stator winding shorter, general 2-3 need change once.
Summary of the invention
For overcoming the prior art defective, the utility model improves the winding slot of core of existing boiler pump motor, provides a kind of high voltage that is easy to processing and manufacturing, anti-leakage field, good cooling results, winding long service life to change the boiler pump motor of low-voltage into.
The technical scheme that its technical problem that solves the utility model adopts is: wet stator boiler pump motor of the present utility model, comprise wet stator, rotor and casing, described wet stator is made up of iron core and winding, be provided with an axial cooling water flow passage component in each wire casing bottom of iron core, described cooling water flow passage component is to make with non-magnetic conductive metal material, horizontal communicating, its cross-sectional area is the long-pending 1/10-1/4 of iron core slot radial section.
The beneficial effects of the utility model are:
1, is easy to processing and manufacturing.Do not change the technology of original winding slot of core, the current of making are led to insertion wire casing bottom get final product.
2, reduce leakage reactance.After the winding slot of core bottom was provided with water stream channel, the wire casing effective depth reduced, and winding wire is arranged in wire casing top, near the wire casing notch, it is about 40% to reduce leakage reactance, thereby helps improving detent torque and breakdown torque, improves the stability of stove starting mode of pump and operation.
3, improve useful life.By water stream channel is set, increased flow by cooling water in the motor cavity, reduced the resistance of cooling water flow, improved the circulation of cooling water, isolated high temperature furnace water simultaneously and transmitted the interior heat of motor body by stove water pump pump head and motor housing, thereby reduced the machine operation temperature, guaranteed to provide winding to be lower than 50 ℃ condition of work, thereby the useful life of raising winding is more than 1 times.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is a winding slot of core radial section organigram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described:
Wet stator boiler pump motor of the present utility model comprises stove water pump 1, wet stator motor 2, wet stator 3, rotor and casing 6 as seen from Figure 1.Described wet stator 3 is made up of iron core and winding 5, install a cross section additional in each wire casing bottom of described iron core and be the ∏ oblique crank Z to cooling water flow passage 4, described cooling water flow passage component is to make with non-magnetic conductive metal material, cross section is ∏ shape, its two lateral wall closely contacts with the wire casing madial wall respectively, two ends communicate with the space at stator winding both ends respectively, its cross-sectional area for the iron core slot radial section long-pending 1/4.
When the stove water pump operation, the cooling water that flows out from high-pressure cooling water pipe 8 enters space, motor windings bottom through outlet conduit, make cooling water pass through in the water stream channel parts 4 and other space, flow direction motor upper end, space and cooling water oral siphon through small impeller 7 pressurizations, and take away heat, flow into the cooler refrigeration again, reach the circulation cooling effect.
Claims (2)
1, high voltage changes the boiler pump motor of low-voltage into, comprises wet stator, rotor and casing, and described wet stator is made up of iron core and winding, it is characterized in that: be provided with an axial cooling water flow passage component in each wire casing bottom of iron core.
2, high voltage as claimed in claim 1 changes the boiler pump motor of low-voltage into, it is characterized in that: described cooling water flow passage component is to make with non-magnetic conductive metal material, cross section is ∏ shape, its two outside closely contacts with wire casing is inboard respectively, two ends communicate with the space at stator winding both ends respectively, and its cross-sectional area is the long-pending 1/10-1/4 of iron core slot radial section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02262953 CN2550948Y (en) | 2002-07-05 | 2002-07-05 | Furnace water pump motor for changing high voltage into low voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02262953 CN2550948Y (en) | 2002-07-05 | 2002-07-05 | Furnace water pump motor for changing high voltage into low voltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2550948Y true CN2550948Y (en) | 2003-05-14 |
Family
ID=33729429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02262953 Expired - Fee Related CN2550948Y (en) | 2002-07-05 | 2002-07-05 | Furnace water pump motor for changing high voltage into low voltage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2550948Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106402016A (en) * | 2016-11-29 | 2017-02-15 | 合肥皖化电泵有限公司 | Auxiliary impeller structure of boiler water pump |
| CN109578293A (en) * | 2018-12-26 | 2019-04-05 | 合肥盛亚电机电泵有限公司 | A kind of double suction Downdraught submersible electric pump |
| CN113489211A (en) * | 2021-07-02 | 2021-10-08 | 哈尔滨电气动力装备有限公司 | Furnace water pump motor heat shield |
-
2002
- 2002-07-05 CN CN 02262953 patent/CN2550948Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106402016A (en) * | 2016-11-29 | 2017-02-15 | 合肥皖化电泵有限公司 | Auxiliary impeller structure of boiler water pump |
| CN109578293A (en) * | 2018-12-26 | 2019-04-05 | 合肥盛亚电机电泵有限公司 | A kind of double suction Downdraught submersible electric pump |
| CN113489211A (en) * | 2021-07-02 | 2021-10-08 | 哈尔滨电气动力装备有限公司 | Furnace water pump motor heat shield |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |