CN107917084B - A kind of operating method of hot water circuit canned motor pump - Google Patents
A kind of operating method of hot water circuit canned motor pump Download PDFInfo
- Publication number
- CN107917084B CN107917084B CN201810018797.6A CN201810018797A CN107917084B CN 107917084 B CN107917084 B CN 107917084B CN 201810018797 A CN201810018797 A CN 201810018797A CN 107917084 B CN107917084 B CN 107917084B
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- China
- Prior art keywords
- runner
- pump
- arcwall
- impeller
- retaining ring
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
- F04D7/06—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being hot or corrosive, e.g. liquid metals
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/06—Lubrication
- F04D29/061—Lubrication especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
- F04D29/4293—Details of fluid inlet or outlet
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
- F04D29/5886—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps cooling by injection
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a kind of operating methods of hot water circuit canned motor pump, it is constant to be intended to provide a kind of intake-outlet pressure difference, the simple and practical canned motor pump of structure, its key points of the technical solution are that pump head is equipped with water inlet and water outlet, interior circulation waterway is equipped in casing, interior circulation waterway includes drainage lumens, the hollow duct being set in pump shaft and the pressure regulation sphere being set in hollow duct, the side of drainage lumens is connected to water outlet, the other side of drainage lumens is connected with hollow duct, hollow duct is connected with the other side of drainage lumens connection side with water inlet, casing side is equipped with plug compatible with drainage lumens, ratio between the axial length of pump shaft and the diameter of impeller is between 1.1-1.2, the present invention is suitable for hot water circuit wall hanging furnace accessory technical field.
Description
Technical field
The present invention relates to a kind of hot water circuit wall hanging furnace accessory technical fields, more specifically, it relates to which a kind of hot water follows
The operating method of ring canned motor pump.
Background technique
The driving of Ordinary Centrifugal Pumps is that the impeller shaft of pump is connected with electronic axle by shaft coupling, makes impeller and motor
It rotates and works together, and canned motor pump is a kind of unprssurized pump, pump and driving motor are all sealed in a pumped medium and fill
In full pressure vessel, this pressure vessel only has static seal, and provides rotating excitation field by an electric wire group and drive rotor.This
Kind structure eliminates the sealing device for rotary shaft that conventional centrifugal pump has, therefore can accomplish complete No leakage.
Currently, hot water circuit canned motor pump in the market, it includes pump head, the impeller being placed in pump head, connect with impeller
Pump shaft, the motor for driving pump shaft to rotate, the casing that is placed on outside motor and connect with pump head and it is set to connecing outside pump head
Wire box.Traditional canned motor pump can form interior circulation waterway because of the pressure difference between intake-outlet, and this part effect is desirable
By controlling and adjusting the progress of the range between the axial length of pump shaft and the diameter of impeller, also, traditional canned motor pump
When being carried out at row to water in pumping, can because the remaining water in pump is sprayed there are overbottom pressure in pump, influence using.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to constant, the structures that provides a kind of intake-outlet pressure difference
Simple and practical canned motor pump.
To achieve the above object, the present invention provides the following technical scheme that a kind of operating method of hot water circuit canned motor pump,
Including pump head, the impeller being placed in pump head, the pump shaft being connect with impeller, the motor for driving pump shaft to rotate, it is placed on outside motor
And the casing connecting with pump head and the terminal box being set to outside pump head, the pump head are equipped with water inlet and water outlet, casing
Interior to be equipped with interior circulation waterway, interior circulation waterway includes drainage lumens, the hollow duct being set in pump shaft and is set to hollow flow
Pressure regulation sphere in road, the side of the drainage lumens are connected to water outlet, and the other side of drainage lumens is connected with hollow duct, in
Empty runner is connected with the other side of drainage lumens connection side with water inlet, and the casing side is equipped with compatible with drainage lumens
Plug, the ratio between the axial length of the pump shaft and the diameter of impeller is between 1.1-1.2.
The present invention is further arranged to: the hollow duct includes sequentially connected runner A, runner B and runner C,
The pressure regulation sphere is placed in runner C, and the outer diameter of pressure regulation sphere is adapted with the internal diameter of runner C, and the internal diameter of runner B is greater than stream
The internal diameter of the internal diameter of road A, runner C is greater than the internal diameter of runner B, and connecting passage, connection flow are additionally provided between runner C and runner B
The internal diameter in road is gradually increased from runner B toward the direction runner C.
The present invention is further arranged to: the water inlet includes outer flow passage and inner flow passage, between outer flow passage and inner flow passage
Equipped with arcwall A and arcwall B, inner flow passage be equipped with arcwall C, arcwall A and arcwall C it is ipsilateral and with arcwall B heteropleural,
Arcwall A and arcwall B is in outer male structure, and arcwall C is in concave inward structure.
The present invention is further arranged to: the inner wall of the water outlet is in concave inward structure, and water outlet includes input terminal and defeated
Outlet, and the internal diameter of water outlet is gradually increased from input terminal toward output end.
The present invention is further arranged to: the pump head, which is equipped with, places annular groove, places annular groove and is equipped with baffle ring, baffle
Ring includes retaining ring A and retaining ring B, and impeller is equipped with retaining ring C, and retaining ring A and the inner wall for placing annular groove contradict, and retaining ring C terminates in retaining ring A
Between retaining ring B, and the internal diameter of retaining ring C is adapted with the outer diameter of retaining ring B.
By using above-mentioned technical proposal, the utility model has the advantages that (1) is because the formation of interior circulation waterway is by water inlet and to go out
Pressure difference between the mouth of a river, and controlled when the pressure difference of this part by the rotation of impeller and the axial length of pump shaft
System, therefore by the ratio between the axial length of pump shaft and the diameter of impeller between 1.1-1.2, so that the interior recirculated water formed
There is no gaps on road, improve the continuity of interior circulation waterway, improve lubrication and cooling effect；
(2) structure setting of hollow duct, it is ensured that interior circulation waterway reduces impact to a certain extent in pump shaft part, mentions
The continuity of circulation waterway in height, and the pressure regulation sphere being arranged in hollow duct, it is ensured that in air exercise booting shell side
Plug, when water remaining in pump is discharged, it is therefore prevented that water flow is sprayed because of overbottom pressure；
(3) structure setting of pump head water outlet and water inlet, it is ensured that the pressure difference of formation guarantees in constant range
The continuity of interior circulation waterway improves lubrication and cooling effect；
(4) pump head, which is equipped with, places annular groove, places annular groove and is equipped with baffle ring, improves impeller and have when rotated well
Self-priming effect.
A kind of operating method of hot water circuit canned motor pump, which is characterized in that following steps: (1) working condition: A. connects electricity
Source, opens motor, and the rotation of motor impeller when outlet pressure meter reading reaches 1.2 times of rated head, is slowly opened
Outlet valve；
B. because being controlled the diameter of impeller and the axial length of pump shaft, in the process of motor impeller rotation
In, so that inlet and outlet form pressure difference, and form interior circulation waterway, interior circulating water flow provides cooling and lubricant effect；
(2) it shuts down: when A. needs to shut down, first gradually turning down the valve of water outlet, wait motors to stop working, then turn off into water
The valve of mouth finally closes the valve of water outlet；
B. remaining water in discharge pump: opening the plug of casing side, and water remaining in pump is discharged.
By using aforesaid operations method, the utility model has the advantages that noticing that the unlatching of water inlet valve and water outlet valve is suitable when switching on and shutting down
Sequence reduces the sucking to air, and then improves the protection to canned motor pump.
Detailed description of the invention
Fig. 1 is the schematic cross-sectional view of a kind of hot water circuit canned motor pump of the present invention and its operating method embodiment.
Appended drawing reference in figure, 1- pump head, 10- water inlet, 101- arcwall A, 102- arcwall B, 103- arcwall C, 11-
Water outlet, 12- place annular groove, 13- baffle ring, 130- retaining ring A, 131- retaining ring B, 2- pump shaft, 20- drainage lumens, 21- hollow flow
Road, 210- runner A, 211- runner B, 212- runner C, 213- connecting passage, 22- pressure regulation sphere, 3- impeller, 30- retaining ring C, 4-
Casing, 5- plug.
Specific embodiment
A kind of hot water circuit canned motor pump embodiment of the present invention is described further referring to Fig.1.
Embodiment
A kind of operating method of hot water circuit canned motor pump, connect including pump head 1, the impeller being placed in pump head 13, with impeller 3
Pump shaft 2, the motor for driving pump shaft 2 to rotate, the casing 4 that is placed on outside motor and connect with pump head 1 and be set to pump head 1
Outer terminal box, the structure of the motor are formed by stator, rotor and the housing being set between stator and rotor,
Pump head 1 is equipped with water inlet 10 and water outlet 11, interior circulation waterway is equipped in casing 4, it is right that the interior circulation waterway of formation improves
The effect of lubrication and cooling inside casing 4, interior circulation waterway include drainage lumens 20, the hollow duct being set in pump shaft 2 21
And be set to the pressure regulation sphere 22 in hollow duct 21, the side of drainage lumens 20 is connected to water outlet 11, drainage lumens 20 it is another
Side is connected with hollow duct 21, and hollow duct 21 is connected with the other side that drainage lumens 20 are connected to side with water inlet 11,
4 side of casing is equipped with plug 5 compatible with drainage lumens 20, passes through the pressure regulation sphere 22 being arranged in hollow duct 21, it is ensured that
Plug 5 in air exercise booting shell 4 side, when water remaining in pump is discharged, it is therefore prevented that water flow is sprayed because of overbottom pressure, pump shaft
Ratio between 2 axial length and the diameter of impeller 3 is between 1.1-1.2, because canned motor pump has different sizes, still
Ratio between the axial length of pump shaft 2 and the diameter of impeller 3 can guarantee constant, and the axial length of pump shaft 2 influences
Factor be interior circulation waterway effective distance, the factor that the diameter of impeller 3 influences is into and out the pressure being capable of forming at the mouth of a river
Difference, therefore above-mentioned ratio is arranged, the pressure difference of intake-outlet, which is in, to be capable of forming interior circulation waterway and guarantees constant state, it is ensured that
The continuity of interior circulation waterway improves lubrication and cooling effect.
The present invention is further arranged to, and hollow duct 21 includes sequentially connected runner A210, runner B211 and runner
C212, pressure regulation sphere 22 are placed in runner C212, and the outer diameter of pressure regulation sphere 22 is adapted with the internal diameter of runner C212, runner
The internal diameter of B211 is greater than the internal diameter of runner A210, and the internal diameter of runner C212 is greater than the internal diameter of runner B211, and runner C212 and stream
Connecting passage 213 is additionally provided between road B211, the internal diameter of connecting passage 213 is gradually increased from runner B211 toward the direction runner C212
Greatly, the structure setting of hollow duct 21, it is ensured that interior circulation waterway reduces impact to a certain extent in pump shaft part, follows in raising
The continuity in ring water route, and the pressure regulation sphere 22 being arranged in hollow duct 21, it is ensured that in the stifled of air exercise booting 4 side of shell
First 5, when water remaining in pump is discharged, it is therefore prevented that water flow is sprayed because of overbottom pressure.
The present invention is further arranged to, and water inlet 10 includes outer flow passage and inner flow passage, is equipped between outer flow passage and inner flow passage
Arcwall A101 and arcwall B102, inner flow passage be equipped with arcwall C103, arcwall A101 and arcwall C103 it is ipsilateral and with
Arcwall B102 heteropleural, arcwall A101 and arcwall B102 are in outer male structure, and arcwall C103 is in concave inward structure, water outlet
11 inner wall be in concave inward structure, water outlet 11 include input terminal and output end, and the internal diameter of water outlet 11 from input terminal toward export
End is gradually increased, the structure setting of 1 water outlet of pump head and water inlet, it is ensured that the pressure difference of formation is in constant range, Jin Erbao
The continuity of interior circulation waterway has been demonstrate,proved, lubrication and cooling effect are improved.
The present invention is further arranged to, and pump head 1, which is equipped with, places annular groove 12, is placed annular groove 12 and is equipped with baffle ring 13, gear
Flowing ring 13 includes retaining ring A130 and retaining ring B131, and impeller 3 is equipped with retaining ring C30, retaining ring A130 and the inner wall for placing annular groove 12
It contradicting, retaining ring C30 is terminated between retaining ring A130 and retaining ring B131, and the internal diameter of retaining ring C30 is adapted with the outer diameter of retaining ring B131,
Pump head 1 be equipped with place annular groove 12, place annular groove 12 be equipped with baffle ring 13, improve impeller 3 have when rotated it is good
Self-priming effect.
A kind of operating method of hot water circuit canned motor pump, which is characterized in that following steps: (1) working condition: A. connects electricity
Source, opens motor, and the rotation of motor impeller when outlet pressure meter reading reaches 1.2 times of rated head, is slowly opened
Outlet valve；
B. because being controlled the diameter of impeller and the axial length of pump shaft, in the process of motor impeller rotation
In, so that inlet and outlet form pressure difference, and form interior circulation waterway, interior circulating water flow provides cooling and lubricant effect；
(2) it shuts down: when A. needs to shut down, first gradually turning down the valve of water outlet, wait motors to stop working, then turn off into water
The valve of mouth finally closes the valve of water outlet；
B. remaining water in discharge pump: opening the plug of casing side, and water remaining in pump is discharged.
When switching on and shutting down, the opening sequence of water inlet valve and water outlet valve is paid attention to, reduce the sucking to air, and then improve
Protection to canned motor pump.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, and those skilled in the art exists
Common variations and alternatives are carried out within the scope of technical solution of the present invention should all be included within the scope of the present invention.
Claims (5)
1. a kind of operating method of hot water circuit canned motor pump, including pump head (1), the impeller (3) and impeller that are placed in pump head (1)
(3) pump shaft (2) connected, is placed on the casing (4) that motor is outer and connect with pump head (1) at the motor for driving pump shaft (2) rotation
And it is set to the terminal box of pump head (1) outside, it is characterized in that: the pump head (1) is equipped with water inlet (10) and water outlet (11),
It is equipped with interior circulation waterway in casing (4), interior circulation waterway includes drainage lumens (20) and the hollow duct that is set in pump shaft (2)
(21), pressure regulation sphere (22) are equipped in hollow duct (21), the side of the drainage lumens (20) is connected to water outlet (11), is drained
The other side of chamber (20) is connected with hollow duct (21), hollow duct (21) be connected to drainage lumens (20) other side of side with
Water inlet (10) is connected, and casing (4) side is equipped with drainage lumens (20) compatible plug (5), the pump shaft (2)
For ratio between axial length and the diameter of impeller (3) between 1.1-1.2, operating procedure is as follows: (1) working condition: A. connects
Motor is opened in energization source, and motor impeller rotates, when outlet pressure meter reading reaches 1.2 times of rated head, slowly
Open outlet valve；B. it because being controlled the diameter of impeller and the axial length of pump shaft, is rotated in motor impeller
During, so that inlet and outlet form pressure difference, and form interior circulation waterway, interior circulating water flow provides cooling and lubrication
Effect；(2) it shuts down: when A. needs to shut down, first gradually turning down the valve of water outlet, wait motors to stop working, then turn off water inlet
Valve, finally the valve of water outlet is closed；B. remaining water in discharge pump: opening the plug of casing side, to Yu Shuijin in pumping
Row discharge.
2. the operating method of a kind of hot water circuit canned motor pump according to claim 1, it is characterized in that: the hollow duct
(21) include sequentially connected runner A(210), runner B(211) and runner C(212), the pressure regulation sphere (22) is placed in stream
Road C(212) in, and the outer diameter of pressure regulation sphere (22) is adapted with the internal diameter of runner C(212), runner B(211) internal diameter be greater than
Runner A(210) internal diameter, runner C(212) internal diameter be greater than runner B(211) internal diameter, and runner C(212) and runner B
(211) it is additionally provided between connecting passage (213), the internal diameter of connecting passage (213) is from runner B(211) toward the direction runner C(212)
It is gradually increased.
3. the operating method of a kind of hot water circuit canned motor pump according to claim 1 or 2, it is characterized in that: the water inlet
(10) include outer flow passage and inner flow passage, arcwall A(101 be equipped between outer flow passage and inner flow passage) and arcwall B(102), interior stream
Road be equipped with arcwall C(103), arcwall A(101) and arcwall C(103) it is ipsilateral and with arcwall B(102) heteropleural, arc
Wall A(101) and arcwall B(102) be in outer male structure, arcwall C(103) it is in concave inward structure.
4. the operating method of a kind of hot water circuit canned motor pump according to claim 1 or 2, it is characterized in that: the water outlet
(11) inner wall is in concave inward structure, and water outlet (11) includes input terminal and output end, and the internal diameter of water outlet (11) is by input terminal
It is gradually increased toward output end.
5. the operating method of a kind of hot water circuit canned motor pump according to claim 1, it is characterized in that: on the pump head (1)
Equipped with annular groove (12) are placed, place annular groove (12) and be equipped with baffle ring (13), baffle ring (13) includes retaining ring A(130) and gear
Enclose B(131), impeller (3) is equipped with retaining ring C(30), retaining ring A(130) contradicted with the inner wall for placing annular groove (12), retaining ring C(30)
Terminate in retaining ring A(130) and retaining ring B(131) between, and retaining ring C(30) internal diameter be adapted with the outer diameter of retaining ring B(131).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810018797.6A CN107917084B (en) | 2018-01-09 | 2018-01-09 | A kind of operating method of hot water circuit canned motor pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810018797.6A CN107917084B (en) | 2018-01-09 | 2018-01-09 | A kind of operating method of hot water circuit canned motor pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107917084A CN107917084A (en) | 2018-04-17 |
| CN107917084B true CN107917084B (en) | 2019-06-14 |
Family
ID=61891371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810018797.6A Active CN107917084B (en) | 2018-01-09 | 2018-01-09 | A kind of operating method of hot water circuit canned motor pump |
Country Status (1)
| Country | Link |
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| CN (1) | CN107917084B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5144177A (en) * | 1988-10-12 | 1992-09-01 | Ksb Aktiengesellschaft | Canned motor pump with heat exchanger in rotor chamber |
| JPH0968195A (en) * | 1995-08-31 | 1997-03-11 | Ebara Corp | Canned motor pump |
| CN101846103A (en) * | 2010-06-19 | 2010-09-29 | 浙江浪奇泵业有限公司 | Cooling structure for hot water recycle pump |
| CN203130530U (en) * | 2013-03-12 | 2013-08-14 | 上海新源动力有限公司 | Inner-circulation compulsory water-cooling electric water pump |
| CN106151054A (en) * | 2015-03-26 | 2016-11-23 | 杭州三花研究院有限公司 | Electric drive pump |
| CN107387424A (en) * | 2017-07-28 | 2017-11-24 | 江苏大学 | A kind of canned motor pump with forcing functions lubricating function |
| CN207762010U (en) * | 2018-01-09 | 2018-08-24 | 大福泵业有限公司 | A kind of hot water circuit canned motor pump |
-
2018
- 2018-01-09 CN CN201810018797.6A patent/CN107917084B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5144177A (en) * | 1988-10-12 | 1992-09-01 | Ksb Aktiengesellschaft | Canned motor pump with heat exchanger in rotor chamber |
| JPH0968195A (en) * | 1995-08-31 | 1997-03-11 | Ebara Corp | Canned motor pump |
| CN101846103A (en) * | 2010-06-19 | 2010-09-29 | 浙江浪奇泵业有限公司 | Cooling structure for hot water recycle pump |
| CN203130530U (en) * | 2013-03-12 | 2013-08-14 | 上海新源动力有限公司 | Inner-circulation compulsory water-cooling electric water pump |
| CN106151054A (en) * | 2015-03-26 | 2016-11-23 | 杭州三花研究院有限公司 | Electric drive pump |
| CN107387424A (en) * | 2017-07-28 | 2017-11-24 | 江苏大学 | A kind of canned motor pump with forcing functions lubricating function |
| CN207762010U (en) * | 2018-01-09 | 2018-08-24 | 大福泵业有限公司 | A kind of hot water circuit canned motor pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107917084A (en) | 2018-04-17 |
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