CN105257555A - Efficient permanent-magnet synchronous submersible electric pump - Google Patents
Efficient permanent-magnet synchronous submersible electric pump Download PDFInfo
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- CN105257555A CN105257555A CN201410342749.4A CN201410342749A CN105257555A CN 105257555 A CN105257555 A CN 105257555A CN 201410342749 A CN201410342749 A CN 201410342749A CN 105257555 A CN105257555 A CN 105257555A
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Abstract
The invention discloses an efficient permanent-magnet synchronous submersible electric pump and relates to power devices used for drainage. The efficient permanent-magnet synchronous submersible electric pump comprises an efficient permanent-magnet synchronous submersible motor and an axial flow pump. The axial flow pump is arranged below the efficient permanent-magnet synchronous submersible motor. The efficient permanent-magnet synchronous submersible motor is connected with the axial flow pump and comprises a stator and a rotor. The stator is arranged outside the rotor. The stator comprises a stator core, a stator winding and a machine base. The rotor comprises a rotary shaft, a rotor core, a rare earth permanent magnet and a rotor starting cage. The rare earth permanent magnet is arranged outside the rotor. The rotor core is arranged on the outer layer of the rare earth permanent magnet. The rotor starting cage is arranged on the rotor core. The stator core is arranged outside the rotor core. The stator winding is wound on the stator core. The efficient permanent-magnet synchronous submersible electric pump is reasonable in design, the technical complexity is low, the operating reliability is greatly improved, high efficiency can be kept, the application range is wide, and the energy conservation and emission reduction effects are more remarkable.
Description
Technical field
What the present invention relates to is a kind of power plant for draining, is specifically related to the synchronous Submerged Motor Pumps of a kind of efficient permanent magnet.
Background technique
The world today, the development of the energy has become the whole world, whole mankind's questions of common interest, also be the major issue of Chinese society economic development, it is the important substance basis of national economy, following national destiny depends on the control of the energy, and the exploitation of the energy and Quality degree of effective utilization and consumption per head are the important symbols of production technology and living standard.
Calculate per capita, China belongs to the relatively poor country of resource, and per capita energy's occupancy volume is less than the average half in the world, and energy security has become the very urgent problem of one, China, causes showing great attention to of country and government.2005, National Development and Reform Committee printed and distributed the notice of " recent major tasks of the building a conservation-minded society division of labor ", and clearly proposing energy-conservation is long-range strategy and policy of China's economy and social development.According to statistics, China's total installed capacity of medium and small motor just is under arms about 3.5 hundred million KW, the electric energy that it consumes accounts for the 60%-70% of the total delivery of China's electrical network, power consumption first rich and influential family on China's electrical network, therefore energy-saving and cost-reducing maximum potential is the economize on electricity of motor, energy-conservationly in the motor will save mass energy.
The approach realizing energy saving motor is exploitation rare-earth permanent-magnet synchronous motor, compared with traditional electrical excitation electromotor, it is simple that rare-earth permanent-magnet synchronous motor has structure, reliable, volume is little, quality is light, loss is little, efficiency is high, the shape and size of motor versatile and flexiblely can wait remarkable advantage, thus application area is very extensive, the rare earth resources of adding China enriches, reserves are about 4 times of other various countries' summations of the world, be known as " rare earth kingdom ", the output of rare earth ore and rare earth permanent magnet is all at the forefront in the world, therefore, give full play to the advantage that China's rare earth resources is abundant, research and extension application high efficiency rare-earth permanent magnet synchronous motor energetically, to the target for energy-saving and emission-reduction carrying out China, there is important strategic importance and use value.
Although permanent magnet synchronous motor application is boundless, but above permanent magnet synchronous motor application area both domestic and external does not all relate to diving machinery, because mechanical Submerged Motor Pumps of diving under water itself exists a series of technological difficulties, as problems such as sealings, be difficult in two industries, find combine with technique point, therefore a kind of diving machinery of design and permanent magnet synchronous motor combined type product, has very active influence to the popularizing of efficient permanent magnet motor, market development.
Summary of the invention
For the deficiency that prior art exists, the present invention seeks to be to provide a kind of efficient permanent magnet synchronous Submerged Motor Pumps, reasonable in design, technical sophistication degree is low, give full play to the advantage of China's rare earth resources, operational reliability improves greatly, can keep higher efficiency, be widely used, effects of energy saving and emission reduction is more remarkable.
To achieve these goals, the present invention realizes by the following technical solutions: the synchronous Submerged Motor Pumps of a kind of efficient permanent magnet, comprise the synchronous submersible electric motor of efficient permanent magnet and axial-flow pump, axial-flow pump is provided with below the synchronous submersible electric motor of efficient permanent magnet, the synchronous submersible electric motor of efficient permanent magnet is connected with axial-flow pump, the synchronous submersible electric motor of efficient permanent magnet comprises stators and rotators, rotor is outside equipped with stator, described stator comprises stator iron core, staor winding and support, rotor comprises rotating shaft, rotor iron core, rare-earth permanent magnet and rotor starting cage, rotor is outside equipped with rare-earth permanent magnet, rare earth permanent magnet volume surrounding is provided with rotor iron core, rotor iron core is provided with rotor starting cage, rotor iron core is outside equipped with stator iron core, stator iron core is wound with staor winding, stator iron core is fixed on support, stator iron core, staor winding, rotor iron core, rare-earth permanent magnet and rotor starting cage are all arranged in support.
As preferably, described rotor upper end is provided with upper end cap, is provided with terminal box above upper end cap, and rotor lower end is provided with lower end cap, rotating shaft below lower end cap is provided with anti-leakage component, and support and upper end cap, terminal box, lower end cap, anti-leakage component, rotating shaft form closed cavity.
As preferably, described axial-flow pump outer installment has exocoel, closed cavity and exocoel be seal obstructed, exocoel has lasting flowing water, by the solid stream of water of exocoel, the synchronous Submerged Motor Pumps of efficient permanent magnet is cooled during work, the temperature rise of Submerged Motor Pumps is effectively controlled, improves electric pump reliability of operation.
As preferably, the synchronous submersible electric motor of described efficient permanent magnet is connected with axial-flow pump by the rotating shaft in rotor, rotor is coaxial with axial-flow pump, is connected to form the synchronous Submerged Motor Pumps of efficient permanent magnet by lower end cap and axial-flow pump, rotarily drives axial-flow pump carry out drainage works by rotor.
Beneficial effect of the present invention: compared with 1, supporting with conventional art Axial-Flow pump AC induction motor, the synchronous submersible electric motor of efficient permanent magnet, does not need idle field current, can significantly improve power factor, can reach 1, even capacitive;
2, stator current and primary resistor loss is decreased, rotor resistance loss is not had when stable operation, thus make its efficiency improve 2-8 percentage point than same specification induction motor, and, the synchronous submersible motor of efficient permanent magnet all can keep higher efficiency in 25%-120% rated load ranges, when making its light running, energy-saving effect is more remarkable;
3, technical sophistication degree is low, and the synchronous Submerged Motor Pumps structure of efficient permanent magnet is relatively simple, and the change of rotor structure does not affect the general structure of Submerged Motor Pumps.
Accompanying drawing explanation
The present invention is described in detail below in conjunction with the drawings and specific embodiments;
Fig. 1 is structural representation of the present invention.
Embodiment
The technological means realized for making the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with embodiment, setting forth the present invention further.
With reference to Fig. 1, this embodiment is by the following technical solutions: the synchronous Submerged Motor Pumps of a kind of efficient permanent magnet, comprise the synchronous submersible electric motor 1 of efficient permanent magnet and axial-flow pump 2, axial-flow pump 2 is provided with below the synchronous submersible electric motor 1 of efficient permanent magnet, the synchronous submersible electric motor 1 of efficient permanent magnet is connected with axial-flow pump 2, the synchronous submersible electric motor 1 of efficient permanent magnet comprises stator 3 and rotor 4, rotor 4 is outside equipped with stator 3, described stator 3 comprises stator iron core 5, staor winding 6 and support 7, rotor 4 comprises rotating shaft 12, rotor iron core 15, rare-earth permanent magnet 16 and rotor starting cage 17, rotor 4 is outside equipped with rare-earth permanent magnet 16, rare-earth permanent magnet 16 skin is provided with rotor iron core 15, rotor iron core 15 is provided with rotor starting cage 17, rotor iron core 15 is outside equipped with stator iron core 5, stator iron core 5 is wound with staor winding 6, stator iron core 5 is fixed on support 7, stator iron core 5, staor winding 6, rotor iron core 15, rare-earth permanent magnet 16 and rotor starting cage 17 are all arranged in support 7, rotor 4 upper end is provided with upper end cap 8, terminal box 9 is provided with above upper end cap 8, rotor 4 lower end is provided with lower end cap 10, rotating shaft 12 below lower end cap 10 is provided with anti-leakage component 11, support 7 and upper end cap 8, terminal box 9, lower end cap 10, anti-leakage component 11, rotating shaft 12 forms closed cavity 13.
It should be noted that, the synchronous submersible electric motor 1 of described efficient permanent magnet is connected with axial-flow pump 2 by the rotating shaft 12 in rotor 4, rotor 4 is coaxial with axial-flow pump 2, be connected to form the synchronous Submerged Motor Pumps of efficient permanent magnet by lower end cap 10 and axial-flow pump 2, rotarily drive axial-flow pump 2 by rotor 4 and carry out drainage works.
It should be noted that, the structure characteristic of the synchronous submersible electric motor 1 of described efficient permanent magnet has permanent-magnet steel outside rotor 4, i.e. rare-earth permanent magnet 16, and arrange rotor starting cage 17, start time-division asynchronous stages: responded to by rotating magnetic field and start mouse cage, make rotating speed reach metasynchronism rotating speed; Pull in the stage: pull in the interaction of the magnetic field that metasynchronism rotating speed is produced by rare-earth permanent magnet 16 and rotating magnetic field, drive axial-flow pump 2 to rotate after reaching synchronous operation and carry out drainage works.
In addition, described axial-flow pump 2 outer installment has exocoel 14, closed cavity 13 and exocoel 14 be seal obstructed, exocoel 14 has lasting flowing water, by the solid stream of water of exocoel 14, the synchronous Submerged Motor Pumps of efficient permanent magnet is cooled during work, thus the temperature rise of Submerged Motor Pumps is effectively controlled, the more important thing is operationally, the loss of induction current and generation thereof is not had in rotor starting cage 17, rotor 4 can not produce thermal expansion, the fault that thorough solution determinant 3, rotor 4 phase are wiped, improves electric pump reliability of operation.
This embodiment is a kind of high efficiency energy saving new drainage and irrigation equipment, the machine integrated novel product of pump be made up of the synchronous submersible electric motor of efficient permanent magnet 1 and axial-flow pump 2, power is provided by the synchronous submersible electric motor 1 of efficient permanent magnet, it does not have rotor resistance loss when stable operation, thus make its efficiency improve 2-8 percentage point than same specification induction motor, and the synchronous submersible motor of efficient permanent magnet 1 all can keep higher efficiency in 25%-120% rated load ranges, when making its light running, energy-saving effect is more remarkable.
This embodiment can be widely used in each specifications and models of submersible pump, Submerged Motor Pumps has a common feature, namely with the increase of the flow of pump, lift, power, the reduction that its rotating speed and impeller diameter are inversely proportional to, its principle to keep impeller external circe speed in the scope limited (or claiming n.D=constant), otherwise the efficiency of water pump reduces, cavitation erosion performance reduces, and even can not operate.And press the principle of asynchronous motor, the motor pole number that rotating speed is lower is more, and power factor is lower, for its variation tendency of submersible axial flow pump as following table:
Upper table can be found out, Submerged Motor Pumps joins the problem that the synchronous submersible electric motor 1 of efficient permanent magnet thoroughly can solve the decline of Submerged Motor Pumps maximization power factor, rated current increase, power supply system loss increase, efficiency reduction, the synchronous submersible electric motor of efficient permanent magnet all can keep higher power factor in 25%-120% rated load ranges, the raising of power factor has saved wattless power on the one hand, also stator current is made to decline on the other hand, stator copper loss reduces, and efficiency improves.Permanent-magnet synchronous Submerged Motor Pumps is typical high efficiency energy saving new drainage and irrigation equipment, particularly now available quantity is very huge, the mechanical facilities of irrigation and drainage of national economy every profession and trade can be widely used in, utilize the technical characteristics that permanent-magnet synchronous motor rotor and conventional asynchronous rotor are directly exchanged, as long as policy guide is correct, carry out large size technical innovation and renewal, great energy-saving and cost-reducing social benefit can be produced.
This embodiment reasonable in design, technical sophistication degree is low, and give full play to the advantage of China's rare earth resources, operational reliability improves greatly, can keep higher efficiency, and effects of energy saving and emission reduction is more remarkable, has wide market application foreground.
More than show and describe basic principle of the present invention and major character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (5)
1. the synchronous Submerged Motor Pumps of efficient permanent magnet, it is characterized in that, comprise the synchronous submersible electric motor of efficient permanent magnet (1) and axial-flow pump (2), the synchronous submersible electric motor of efficient permanent magnet (1) below is provided with axial-flow pump (2), the synchronous submersible electric motor of efficient permanent magnet (1) is connected with axial-flow pump (2), the synchronous submersible electric motor of efficient permanent magnet (1) comprises stator (3) and rotor (4), rotor (4) is outside equipped with stator (3), described stator (3) comprises stator iron core (5), staor winding (6) and support (7), rotor (4) comprises rotating shaft (12), rotor iron core (15), rare-earth permanent magnet (16) and rotor starting cage (17), rotor (4) is outside equipped with rare-earth permanent magnet (16), rare-earth permanent magnet (16) skin is provided with rotor iron core (15), rotor iron core (15) is provided with rotor starting cage (17), rotor iron core (15) is outside equipped with stator iron core (5), stator iron core (5) is wound with staor winding (6), stator iron core (5) is fixed on support (7), stator iron core (5), staor winding (6), rotor iron core (15), rare-earth permanent magnet (16) and rotor starting cage (17) are all arranged in support (7).
2. the synchronous Submerged Motor Pumps of a kind of efficient permanent magnet according to claim 1, it is characterized in that, described rotor (4) upper end is provided with upper end cap (8), upper end cap (8) top is provided with terminal box (9), rotor (4) lower end is provided with lower end cap (10), the rotating shaft (12) of lower end cap (10) below is provided with anti-leakage component (11), and support (7) and upper end cap (8), terminal box (9), lower end cap (10), anti-leakage component (11), rotating shaft (12) form closed cavity (13).
3. the synchronous Submerged Motor Pumps of a kind of efficient permanent magnet according to claim 1, it is characterized in that, the structure characteristic of the synchronous submersible electric motor of described efficient permanent magnet (1) is that rotor (4) is outside equipped with rare-earth permanent magnet (16), and arrange rotor starting cage (17), start time-division asynchronous stages: responded to by rotating magnetic field and start mouse cage, make rotating speed reach metasynchronism rotating speed; Pull in the stage: pull in the interaction of the magnetic field that metasynchronism rotating speed is produced by rare-earth permanent magnet (16) and rotating magnetic field, drive axial-flow pump (2) to rotate after reaching synchronous operation and carry out drainage works.
4. the synchronous Submerged Motor Pumps of a kind of efficient permanent magnet according to claim 1, it is characterized in that, the synchronous submersible electric motor of described efficient permanent magnet (1) is connected with axial-flow pump (2) by the rotating shaft (12) in rotor (4), rotor (4) is coaxial with axial-flow pump (2), be connected to form the synchronous Submerged Motor Pumps of efficient permanent magnet by lower end cap (10) with axial-flow pump (2), rotarily drive axial-flow pump (2) by rotor (4) and carry out drainage works.
5. the synchronous Submerged Motor Pumps of a kind of efficient permanent magnet according to claim 1, it is characterized in that, described axial-flow pump (2) outer installment has exocoel (14), closed cavity (13) and exocoel (14) be seal obstructed, exocoel (14) has lasting flowing water, by the solid stream of water of exocoel (14), the synchronous Submerged Motor Pumps of efficient permanent magnet is cooled during work, thus the temperature rise of Submerged Motor Pumps is effectively controlled, operationally, the loss of induction current and generation thereof is not had in rotor starting cage (17), rotor (4) can not produce thermal expansion, thoroughly solve stator (3), the fault that rotor (4) is wiped mutually, improve electric pump reliability of operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410342749.4A CN105257555A (en) | 2014-07-18 | 2014-07-18 | Efficient permanent-magnet synchronous submersible electric pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410342749.4A CN105257555A (en) | 2014-07-18 | 2014-07-18 | Efficient permanent-magnet synchronous submersible electric pump |
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| CN105257555A true CN105257555A (en) | 2016-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410342749.4A Pending CN105257555A (en) | 2014-07-18 | 2014-07-18 | Efficient permanent-magnet synchronous submersible electric pump |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11113230A (en) * | 1997-10-01 | 1999-04-23 | Fumito Komatsu | Bipolar synchronous motor |
| CN2620421Y (en) * | 2003-04-23 | 2004-06-09 | 闽东电机(集团)股份有限公司 | High-efficient energy-saving synchronous motor of rare-earth permanent magnetic high-slip starting |
| CN200959540Y (en) * | 2005-04-08 | 2007-10-10 | 陈冶频 | Rare-earth permanet-magnetic synchronized motor of high-energy and start torque |
| CN101594036A (en) * | 2009-06-26 | 2009-12-02 | 沈阳工业大学 | Wound rotor self-starting permasyn motor |
| CN203722413U (en) * | 2013-12-27 | 2014-07-16 | 合肥盛亚电机电泵有限公司 | Dry-type stator submersible electric pump capable of preventing friction between stator and rotor |
| CN204126910U (en) * | 2014-07-18 | 2015-01-28 | 合肥盛亚电机电泵有限公司 | The synchronous Submerged Motor Pumps of a kind of efficient permanent magnet |
-
2014
- 2014-07-18 CN CN201410342749.4A patent/CN105257555A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11113230A (en) * | 1997-10-01 | 1999-04-23 | Fumito Komatsu | Bipolar synchronous motor |
| CN2620421Y (en) * | 2003-04-23 | 2004-06-09 | 闽东电机(集团)股份有限公司 | High-efficient energy-saving synchronous motor of rare-earth permanent magnetic high-slip starting |
| CN200959540Y (en) * | 2005-04-08 | 2007-10-10 | 陈冶频 | Rare-earth permanet-magnetic synchronized motor of high-energy and start torque |
| CN101594036A (en) * | 2009-06-26 | 2009-12-02 | 沈阳工业大学 | Wound rotor self-starting permasyn motor |
| CN203722413U (en) * | 2013-12-27 | 2014-07-16 | 合肥盛亚电机电泵有限公司 | Dry-type stator submersible electric pump capable of preventing friction between stator and rotor |
| CN204126910U (en) * | 2014-07-18 | 2015-01-28 | 合肥盛亚电机电泵有限公司 | The synchronous Submerged Motor Pumps of a kind of efficient permanent magnet |
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Application publication date: 20160120 |