CN202531442U - Mechanical-electrical integrated photovoltaic direct-current high-power submersible pump - Google Patents
Mechanical-electrical integrated photovoltaic direct-current high-power submersible pump Download PDFInfo
- Publication number
- CN202531442U CN202531442U CN201220021860XU CN201220021860U CN202531442U CN 202531442 U CN202531442 U CN 202531442U CN 201220021860X U CN201220021860X U CN 201220021860XU CN 201220021860 U CN201220021860 U CN 201220021860U CN 202531442 U CN202531442 U CN 202531442U
- Authority
- CN
- China
- Prior art keywords
- rotor
- pump
- bearing
- stator
- electromechanical integration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The utility model discloses a mechanical-electrical integrated photovoltaic direct-current high-power submersible pump, which comprises a submersible pump body, a direct-current motor, a solar power component and a controller, wherein the upper end of a shell of the direct-current motor is fixedly connected with the lower end of the pump body; the upper end of a rotor shaft of the direct-current motor is connected with the lower end of a pump shaft through a coupling; the controller is connected with an output end of the solar power component and an input cable of the direct-current motor; and the controller is connected with a water level sensor. By adoption of the controller, automatic over-current protection of the direct-current motor, the maximum power tracking of the solar power component, motor rotating speed abnormal protection, drying protection of a water pump, double-water-level detection and automatic stop, and pipeline water return re-start prevention can be realized. The motor has a permanent-magnet brushless position sensorless structure; after a stator and a rotor are respectively enveloped, cooling is realized by water flow; water lubrication is realized by using a graphite bearing, and the problem about heating is solved; and the mechanical-electrical integrated photovoltaic direct-current high-power submersible pump is high in motor power, noiseless, fully-automatic, high in reliability, high in matching suitability of water supply amount and evaporation amount, high in flow and high in lift, and can be unattended in operation all day.
Description
Technical field:
The utility model relates to mechanical field, relates in particular to fluid machinery, particularly direct current submersible pump, and concrete is the high-power submerged pump of a kind of electromechanical integration photovoltaic DC.
Background technique:
During farming and animal husbandry is produced, often need utilize submersible pump to extract current.Therefore water pump needs power supply by motor driving.But the field does not often possess Power Supplies Condition, so the available technology adopting internal-combustion engine directly drives water pump, perhaps by the internal-combustion engine drives generator for electricity generation.Fuel capacity is limited in the internal-combustion engine, can not keep long-time running, and operational noise is big, and the exhaust emission pollution environment needs personnel on duty.Although the field can utilize solar cell power generation; But what solar cell was exported is direct current, if the water pump that uses AC motor to drive; Need in system, add inverter and realize the conversion of direct current, can produce 10%～15% power loss like this to Ac.And the water pump that uses direct current generator to drive, when realization was more high-power, motor can be overheated, causes fault.Especially the direct current generator that drives submersible pump needs sealing when working in underwater environment, the heat that produces in the motor operation course more is difficult for distributing.
Summary of the invention:
The purpose of the utility model is to provide a kind of electromechanical integration photovoltaic DC high-power submerged pump, and the high-power submerged pump of described this electromechanical integration photovoltaic DC will solve the technical problem that the unfavorable submersible pump of Power Supplies Condition is worked in the existing technology in the open air.
The high-power submerged pump of this electromechanical integration photovoltaic DC of the utility model comprises a submersible pump, a direct current generator, a solar-electricity source component and a controller; Described submersible pump includes a pump housing, a pump shaft, one group of receded disk impeller, and described receded disk impeller is arranged on the described pump shaft, and pump shaft is arranged in the pump housing through bearing; The lower end of the pump housing is provided with suction port; The upper end of the pump housing is provided with exhaust port, and described direct current generator is made up of stator, rotor, input cable, front-end bearing pedestal and rear bearing block, and described stator is tubular; Stator is made up of casing and coil winding; Described coil winding is wound on the iron core and is arranged on the inner circumference of casing, and described input cable is connected with coil winding, and described rotor is arranged in the stator; Described front-end bearing pedestal and rear bearing block are fixedly connected on the two ends of stator respectively; Described rotor includes a rotor shaft, and the two ends of described rotor shaft are arranged in front-end bearing pedestal and the rear bearing block through bearing respectively, and described solar-electricity source component is made up of through series parallel connection solar panel.Wherein, The upper end of motor is fixedly connected with the lower end of the pump housing; The upper end of rotor shaft is connected with the lower end of pump shaft through coupling, and described controller is connected with the output terminal of solar-electricity source component and the input cable of direct current generator, also is connected with level sensor on the controller.
Further; The casing inner wall upper edge of direct current generator is circumferential to be set with a seal stator isolation layer; Described coil winding and iron core all are arranged in the described seal stator isolation layer; The seal stator isolation layer surrounds coil winding and iron core and fills the gap between coil winding, iron core and the casing inner wall; Described rotor is made up of the magnet steel of rotor shaft, rotor yoke, rotor cover and two above numbers; Described rotor shaft is arranged on the axle center of rotor yoke, and described magnet steel is distributed on the excircle of rotor yoke along circumferential commentaries on classics equal angles, and coaxial and fixed cover is located at outside the magnet steel described rotor cover with rotor yoke; Between the gap of rotor cover and rotor yoke, all be filled with the rotor seal insulator between any adjacent two magnet steel, all be coated with the rotor seal isolation layer on the two ends end face of rotor cover, rotor yoke and magnet steel.
Further; The bearing at the two ends of rotor shaft constitutes by graphite bearing; Be provided with the groove of two above numbers in the inner peripheral wall of described graphite bearing; Any described groove all extends to the other end end face of graphite bearing from an end end face of graphite bearing, any groove all is arranged in a plane separately, any described plane all with the axially all structure of graphite bearing in an angle; All the angle of angle equates, described groove distributes along the branches such as inner circumference direction of graphite bearing.
Further, described seal stator isolation layer is made up of ceramic body or resinite or metal cladding.
Further, described rotor seal insulator is made up of ceramic body or resinite, and described rotor seal isolation layer is made up of ceramic body or resinite or metal cladding.
Further, be respectively arranged with water lubriucated bearing in described front-end bearing pedestal and the rear bearing block.
Further, the rear end of described rotor shaft is provided with a slide plate, is provided with a thrust bearing in the described rear bearing block.
Further, the position of departing from axis hole in the described front-end bearing pedestal is provided with a lead via hole, and described coil winding is connected with a lead, and an end of described lead stretches out from the end face of seal stator isolation layer and passes described lead via hole.
The position of further, departing from axis hole in the described rear bearing block is provided with a water passage hole.
Further, be provided with three described grooves in the inner peripheral wall of described graphite bearing.
Further, described direct current generator adopts brushless position-sensor-free permanent magnet DC motor.
Further, include single-chip microcomputer in the described controller, the input/output interface of described single-chip microcomputer is connected with level sensor, is connected with relay on the input/output interface of single-chip microcomputer.
The working principle of the utility model is: submersible pump and direct current generator be arranged in the well, below the water surface, and controller obtains direct current from the solar-electricity source component, drive direct current generator; The receded disk impeller rotation, liquid rotates with blade, under action of centrifugal force; Flying away from impeller outwards penetrates; The liquid speed in the pump case explosion chamber that penetrates is slack-off, and pressure increases, and flows out from pump housing exhaust port then.In the blade center, owing to liquid forms the low pressure area that does not only have air but also do not have liquid around being thrown toward, the water body in the well in the suction pipe inflow pump, continuously is pumped up from well under the atmospheric effect of pond face.Stator in the direct current generator produces rotating magnetic field under the driving of controller, rotor rotates in rotating magnetic field.When working in underwater environment, current get into stator and gap between rotor from front-end bearing pedestal, and discharge from rear bearing block, produce lubrication between current and the graphite bearing, and take away the heat that produces in stator and the rotor.The seal stator isolation layer prevents that current from getting into coil winding and iron core, realizes the sealed insulation of stator.Rotor seal insulator and rotor seal isolation layer prevent that current from getting in the rotor cover, realizes the sealed insulation of rotor.The slide plate of rotor shaft rear end and the thrust bearing in the rear bearing block cooperate, and can eliminate the axial force that rotor shaft receives.Graphite bearing and rotor shaft produce moisture film between the gap of graphite bearing and rotor shaft in relative rotary course, realize water lubrication.Simultaneously, the water in the gap of graphite bearing and rotor shaft is promoted by groove, discharges from an end of graphite bearing, thereby forms current, can take out of by the heat that direct current generator is inner.
The utility model and prior art are compared, and its effect is actively with tangible.The utility model utilizes controller can realize the automatic overcurrent protection of direct current generator, realizes MPPT solar cell maximum power tracing, realizes the motor speed abnormal protection; The realization water pump is done and is played protection; Realize two water level detecting and automatic stop, prevent that the pipeline backwater from restarting function, also can realize lightning protection.Direct current generator adopts brushless, permanently position-sensor-free structure, behind stator and the rotor difference plastic packaging, utilizes current to realize cooling, adopts graphite bearing to realize water lubrication, has solved heating problem, and it is perhaps higher that power of motor can rise to 3000W.The utility model noiseless, full-automatic, highly reliable, water output and steam output suitability are good, peak rate of flow can reach 22 tons/per hour more than, H-Max 250M can round-the-clock unattended operation.
Description of drawings:
Fig. 1 is an embodiment's the schematic representation of the high-power submerged pump of a kind of electromechanical integration photovoltaic DC of the utility model.
Fig. 2 is the structural representation of the direct current generator in the high-power submerged pump of a kind of electromechanical integration photovoltaic DC of the utility model.
Fig. 3 is the axial section schematic representation of the rotor in the direct current generator in the high-power submerged pump of a kind of electromechanical integration photovoltaic DC of the utility model.
Fig. 4 is the radial section schematic representation of the rotor in the direct current generator in the high-power submerged pump of a kind of electromechanical integration photovoltaic DC of the utility model.
Fig. 5 is that graphite bearing in the direct current generator in the high-power submerged pump of a kind of electromechanical integration photovoltaic DC of the utility model is as the embodiment's of fore bearing axial arrangement schematic representation.
Fig. 6 is that graphite bearing in the direct current generator in the high-power submerged pump of a kind of electromechanical integration photovoltaic DC of the utility model is as the embodiment's of fore bearing radial structure schematic representation.
Fig. 7 is that graphite bearing in the direct current generator in the high-power submerged pump of a kind of electromechanical integration photovoltaic DC of the utility model is as the embodiment's of rear bearing axial arrangement schematic representation.
Graphite bearing in the direct current generator in the high-power submerged pump of a kind of electromechanical integration photovoltaic DC of Fig. 8 the utility model is as the embodiment's of rear bearing radial structure schematic representation.
Embodiment:
Embodiment 1:
Like Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7 and shown in Figure 8; The high-power submerged pump of a kind of electromechanical integration photovoltaic DC of the utility model comprises a submersible pump 100, direct current generator 200, a solar-electricity source component 300 and a controller 400; Described submersible pump 100 includes a pump housing, a pump shaft (not shown), one group of receded disk impeller (not shown); Described receded disk impeller is arranged on the described pump shaft; Pump shaft is arranged in the pump housing through bearing; The lower end of the pump housing is provided with suction port 101, and the upper end of the pump housing is provided with exhaust port, and described solar-electricity source component 300 is formed (not shown) by solar panel through series parallel connection.Wherein, The upper end of the casing 205 of direct current generator 200 is fixedly connected with the lower end of the pump housing; The upper end of direct current generator 200 rotor axles 209 is connected with the lower end of pump shaft through coupling; Described controller 400 is connected with the output terminal of solar-electricity source component 300 and the input cable of direct current generator 200, also is connected with level sensor 500 on the controller 400.
Further; Direct current generator 200 is made up of stator 201, rotor 202, front-end bearing pedestal 203 and rear bearing block 204; Described stator 201 is tubular; Stator 201 is made up of casing 205 and coil winding 206; Described coil winding 206 is wound on the iron core 207 and is arranged on the inner circumference of casing 205; Described rotor 202 is arranged in the stator 201, and wherein, the inwall upper edge of described casing 205 is circumferential to be set with a seal stator isolation layer 208; Described coil winding 206 all is arranged in the described seal stator isolation layer 208 with iron core 207; Seal stator isolation layer 208 surrounds coil winding 206 and iron core 207 and fills the gap between coil winding 206, iron core 207 and casing 205 inwalls, and described rotor 202 is made up of the magnet steel 212 of rotor shaft 209, rotor yoke 210,211 and two above numbers of rotor cover, and described rotor shaft 209 is arranged on the axle center of rotor yoke 210; Described magnet steel 212 is distributed on the excircle of rotor yoke 210 along circumferential commentaries on classics equal angles; Coaxial and the fixed cover of described rotor cover 211 and rotor yoke 210 is located at outside the magnet steel 212, and between the gap of rotor cover 211 and rotor yoke 210, all be filled with rotor seal insulator 213 between any adjacent two magnet steel 212, rotor overlaps 211, all be coated with rotor seal isolation layer 214 on the two ends end face of rotor yoke 210 and magnet steel 212; Described front-end bearing pedestal 203 and rear bearing block 204 are fixedly connected on the two ends of stator 201 respectively, and the two ends of rotor shaft 209 are arranged in front-end bearing pedestal 203 and the rear bearing block 204 through bearing 215 respectively.
Further, described seal stator isolation layer 208 is made up of ceramic body or resinite or metal cladding.
Further, described rotor seal insulator 213 is made up of ceramic body or resinite, and described rotor seal isolation layer 214 is made up of ceramic body or resinite or metal cladding.
Further, the rear end of described rotor shaft 209 is provided with a slide plate 216, is provided with a thrust bearing 217 in the described rear bearing block 204.
Further; The position of departing from axis hole in the described front-end bearing pedestal 203 is provided with a lead via hole 218; Described coil winding 206 is connected with a lead 219, and an end of described lead 219 stretches out from the end face of seal stator isolation layer 208 and passes described lead via hole 218.
The position of further, departing from axis hole in the described rear bearing block 204 is provided with a water passage hole 220.
Further; The bearing at the two ends of rotor shaft 209 constitutes by graphite bearing; Be provided with the groove 221 of two above numbers in the inner peripheral wall of graphite bearing; Any described groove 221 all extends to the other end end face of graphite bearing from an end end face of graphite bearing, any groove 221 all is arranged in a plane separately, any described plane all with graphite bearing axially all constitute an angle; All the angle of angle equates, described groove 221 distributes along the branches such as inner circumference direction of graphite bearing.
Further, be provided with three described grooves 221 in the inner peripheral wall of described graphite bearing.
Further, the angle of any described angle is all spent between 45 degree 5.
Further, the angle of any described angle is 30 degree.
Further, described direct current generator 200 adopts brushless position-sensor-free permanent magnet DC motor 200.
Further, include the single-chip microcomputer (not shown) in the described controller 400, the input/output interface of described single-chip microcomputer is connected with level sensor 500, is connected with the relay (not shown) on the input/output interface of single-chip microcomputer.
The working principle of present embodiment is: submersible pump 100 is arranged in the well with direct current generator 200, below the water surface, and controller 400 obtains direct current from solar-electricity source component 300, drive direct current generator 200; The receded disk impeller rotation, liquid rotates with blade, under action of centrifugal force; Flying away from impeller outwards penetrates; The liquid speed in the pump case explosion chamber that penetrates is slack-off, and pressure increases, and flows out from pump housing exhaust port then.In the blade center, owing to liquid forms the low pressure area that does not only have air but also do not have liquid around being thrown toward, the water body in the well in the suction pipe inflow pump, continuously is pumped up from well under the atmospheric effect of pond face.There is not under the situation of sunlight the electric energy work of direct current generator 200 storage batteries capable of using.Having under the situation of sunlight, solar-energy photo-voltaic cell passes through charger to charge in batteries.Stator 201 in the direct current generator 200 produces rotating magnetic field under the driving of controller 400, rotor 202 rotates in rotating magnetic field.When working in underwater environment, current get into the gap between stators 201 and the rotor 202 from front-end bearing pedestal 203, and discharge from rear bearing block 204, produce lubrication between current and the graphite bearing, and take away the heat that produces in stator 201 and the rotor 202.Seal stator isolation layer 208 prevents that current from getting into coil winding 206 and iron core 207, realizes the sealed insulation of stator 201.Rotor seal insulator 213 prevents that with rotor seal isolation layer 214 current from getting in the rotor cover 211, realizes the sealed insulation of rotor 202.The slide plate 216 and the thrust bearing in the rear bearing block 204 217 of rotor shaft 209 rear ends cooperate, and can eliminate the axial force that rotor shaft 209 receives.Graphite bearing and rotor shaft 209 produce moisture film between the gap of graphite bearing and rotor shaft 209 in relative rotary course, realize water lubrication.Simultaneously, the water in the gap of graphite bearing and rotor shaft 209 is promoted by groove 221, discharges from an end of graphite bearing, thereby forms current, can direct current generator 200 inner heats be taken out of.
Claims (9)
1. the high-power submerged pump of electromechanical integration photovoltaic DC comprises a submersible pump, a direct current generator, a solar-electricity source component and a controller, and described submersible pump includes a pump housing, a pump shaft, one group of receded disk impeller; Described receded disk impeller is arranged on the described pump shaft; Pump shaft is arranged in the pump housing through bearing, and the lower end of the pump housing is provided with suction port, and the upper end of the pump housing is provided with exhaust port; Described direct current generator is made up of stator, rotor, input cable, front-end bearing pedestal and rear bearing block; Described stator is tubular, and stator is made up of casing and coil winding, and described coil winding is wound on the iron core and is arranged on the inner circumference of casing; Described input cable is connected with coil winding; Described rotor is arranged in the stator, and described front-end bearing pedestal and rear bearing block are fixedly connected on the two ends of stator respectively, and described rotor includes a rotor shaft; The two ends of described rotor shaft are arranged in front-end bearing pedestal and the rear bearing block through bearing respectively; Described solar-electricity source component is made up of through series parallel connection solar panel, it is characterized in that: the upper end of motor is fixedly connected with the lower end of the pump housing, and the upper end of rotor shaft is connected with the lower end of pump shaft through coupling; Described controller is connected with the output terminal of solar-electricity source component and the input cable of direct current generator, also is connected with level sensor on the controller.
2. the high-power submerged pump of a kind of electromechanical integration photovoltaic DC as claimed in claim 1; It is characterized in that: the casing inner wall upper edge of direct current generator is circumferential to be set with a seal stator isolation layer; Described coil winding and iron core all are arranged in the described seal stator isolation layer; The seal stator isolation layer surrounds coil winding and iron core and fills the gap between coil winding, iron core and the casing inner wall; Described rotor is made up of the magnet steel of rotor shaft, rotor yoke, rotor cover and two above numbers; Described rotor shaft is arranged on the axle center of rotor yoke, and described magnet steel is distributed on the excircle of rotor yoke along circumferential commentaries on classics equal angles, and coaxial and fixed cover is located at outside the magnet steel described rotor cover with rotor yoke; Between the gap of rotor cover and rotor yoke, all be filled with the rotor seal insulator between any adjacent two magnet steel, all be coated with the rotor seal isolation layer on the two ends end face of rotor cover, rotor yoke and magnet steel.
3. the high-power submerged pump of a kind of electromechanical integration photovoltaic DC as claimed in claim 1; It is characterized in that: the bearing at the two ends of rotor shaft constitutes by graphite bearing; Be provided with the groove of two above numbers in the inner peripheral wall of described graphite bearing; Any described groove all extends to the other end end face of graphite bearing from an end end face of graphite bearing, any groove all is arranged in a plane separately, any described plane all with the axially all structure of graphite bearing in an angle; All the angle of angle equates, described groove distributes along the branches such as inner circumference direction of graphite bearing.
4. the high-power submerged pump of a kind of electromechanical integration photovoltaic DC as claimed in claim 2 is characterized in that: described seal stator isolation layer is made up of ceramic body or resinite or metal cladding.
5. the high-power submerged pump of a kind of electromechanical integration photovoltaic DC as claimed in claim 2; It is characterized in that: described rotor seal insulator is made up of ceramic body or resinite, and described rotor seal isolation layer is made up of ceramic body or resinite or metal cladding.
6. the high-power submerged pump of a kind of electromechanical integration photovoltaic DC as claimed in claim 2 is characterized in that: be respectively arranged with water lubriucated bearing in described front-end bearing pedestal and the rear bearing block.
7. the high-power submerged pump of a kind of electromechanical integration photovoltaic DC as claimed in claim 2, it is characterized in that: the rear end of described rotor shaft is provided with a slide plate, is provided with a thrust bearing in the described rear bearing block.
8. the high-power submerged pump of a kind of electromechanical integration photovoltaic DC as claimed in claim 2; It is characterized in that: the position of departing from axis hole in the described front-end bearing pedestal is provided with a lead via hole; Described coil winding is connected with a lead, and an end of described lead stretches out from the end face of seal stator isolation layer and passes described lead via hole.
9. the high-power submerged pump of a kind of electromechanical integration photovoltaic DC as claimed in claim 2 is characterized in that: the position of departing from axis hole in the described rear bearing block is provided with a water passage hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220021860XU CN202531442U (en) | 2012-01-18 | 2012-01-18 | Mechanical-electrical integrated photovoltaic direct-current high-power submersible pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220021860XU CN202531442U (en) | 2012-01-18 | 2012-01-18 | Mechanical-electrical integrated photovoltaic direct-current high-power submersible pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202531442U true CN202531442U (en) | 2012-11-14 |
Family
ID=47132631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220021860XU Expired - Fee Related CN202531442U (en) | 2012-01-18 | 2012-01-18 | Mechanical-electrical integrated photovoltaic direct-current high-power submersible pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202531442U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105201866A (en) * | 2015-10-27 | 2015-12-30 | 余雷 | High-efficiency low-consumption solar pump |
-
2012
- 2012-01-18 CN CN201220021860XU patent/CN202531442U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105201866A (en) * | 2015-10-27 | 2015-12-30 | 余雷 | High-efficiency low-consumption solar pump |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2013112573A3 (en) | Power conversion and energy storage device | |
| CN101787978A (en) | Novel fully-tubular electric submerged pump with shaft incapable of transferring torque | |
| US20190003479A1 (en) | Pump, associated electric machine and associated method | |
| CN110513306B (en) | Hydrogen circulating pump with function opens ice | |
| CN103887927B (en) | A kind of energy storage device of magnetic suspension flywheel cooling system | |
| CN202381401U (en) | Brushless electric circulating water pump | |
| CN103795179A (en) | Blade electric vehicle-used liquid cooling type high efficient technological motor (TM) with brake assist | |
| CN201521462U (en) | Novel full through-flow submersible pump | |
| CN102808783A (en) | Mechanical and electrical integrated photovoltaic direct-current high-power submersible pump | |
| CN202863748U (en) | Propeller adopting water lubricated bearing | |
| CN202531442U (en) | Mechanical-electrical integrated photovoltaic direct-current high-power submersible pump | |
| CN112072858A (en) | Gate pump direct-drive permanent magnet motor | |
| CN104005913A (en) | Vertical axis wind turbine | |
| CN203272159U (en) | Through-flow submersible electric pump | |
| CN107630822A (en) | A kind of permagnetic synchronous motor solar energy water pumping system and control method | |
| CN203604104U (en) | Novel water turbine for cooling tower | |
| CN207715381U (en) | A kind of permanent magnet synchronous motor solar energy water pumping system | |
| CN204376666U (en) | Permanent-magnet synchronous submersible electric motor | |
| CN203151313U (en) | Permanent magnetic direct drive aerogenerator with water cooling device | |
| CN207598519U (en) | A kind of permanent magnet synchronous motor water pump | |
| CN202091211U (en) | High-temperature-resistant rare-earth permanent-magnet brushless direct current self-priming pump | |
| CN204851674U (en) | Oil field deep well oil production device | |
| CN103277320B (en) | A kind of through-flow submersible electric pump | |
| CN101793254A (en) | Single-stage horizontal automatic balancing centrifugal sealing pump | |
| CN205212681U (en) | Novel drag electricity generation type motor in two plays axle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121114 Termination date: 20150118 |
|
| EXPY | Termination of patent right or utility model |