CN107917084A - A kind of hot water circuit canned motor pump and its operating method - Google Patents
A kind of hot water circuit canned motor pump and its operating method Download PDFInfo
- Publication number
- CN107917084A CN107917084A CN201810018797.6A CN201810018797A CN107917084A CN 107917084 A CN107917084 A CN 107917084A CN 201810018797 A CN201810018797 A CN 201810018797A CN 107917084 A CN107917084 A CN 107917084A
- Authority
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- China
- Prior art keywords
- runner
- pump
- baffle ring
- arcwall
- impeller
- 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
Abstract
The invention discloses a kind of hot water circuit canned motor pump and its operating method, it is constant to aim to provide a kind of intake-outlet pressure difference, canned motor pump simple in structure and highly practical, its key points of the technical solution are that pump head is equipped with water inlet and water outlet, interior circulation waterway is equipped with casing, interior circulation waterway includes drainage lumens, the hollow duct being arranged in pump shaft and the pressure regulation sphere being arranged in hollow duct, the side of drainage lumens is connected with water outlet, the opposite side of drainage lumens is connected with hollow duct, hollow duct is connected with the opposite side of drainage lumens connection side with water inlet, casing side is equipped with the plug being adapted 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 field, more specifically, it relates to which a kind of hot water follows
Ring canned motor pump and its operating method.
Background technology
The driving of Ordinary Centrifugal Pumps is that the impeller axle of pump is connected with electronic axle by shaft coupling, makes impeller and motor
Rotate and work 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 is provided rotating excitation field by an electric wire group and driven rotor.This
Kind structure eliminates the sealing device for rotary shaft that conventional centrifugal pump has, therefore can accomplish complete No leakage.
At present, the hot water circuit canned motor pump of in the market, it includes pump head, the impeller being placed in pump head, is connected with impeller
Pump shaft, for driving the rotating motor of pump shaft, the casing for being placed on outside motor and being connected with pump head and being arranged at connecing outside pump head
Wire box.Traditional canned motor pump can be because pressure differential between intake-outlet, circulation waterway in formation, and this part effect is desirable
Carried out by controlling and adjusting the scope between the axial length of pump shaft and the diameter of impeller, also, traditional canned motor pump
When water is carried out at row in pump, the remaining water in pump can be sprayed, influence to use because there are overbottom pressure in pump.
The content of the invention
In view of the deficiencies of the prior art, the present invention intends to constant, the structure that provides a kind of intake-outlet pressure difference
Simple and highly practical canned motor pump.
To achieve the above object, the present invention provides following technical solution：A kind of hot water circuit canned motor pump, including pump head,
The impeller that is placed in pump head, the pump shaft being connected with impeller, for driving the rotating motor of pump shaft, being placed on outside motor and connect with pump head
The casing connect and the terminal box being arranged at outside pump head, the pump head are equipped with water inlet and water outlet, interior follow are equipped with casing
Ring water route, interior circulation waterway include drainage lumens, the hollow duct being arranged in pump shaft and the pressure regulation being arranged in hollow duct
Sphere, the side of the drainage lumens are connected with water outlet, and the opposite side of drainage lumens is connected with hollow duct, and hollow duct is with drawing
The opposite side of stream chamber connection side is connected with water inlet, and the casing side is equipped with the plug being adapted with drainage lumens, described
Ratio between the axial length of 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 outside diameter of pressure regulation sphere is adapted with the internal diameter of runner C, and the internal diameter of runner B is more than stream
The internal diameter of road A, the internal diameter of runner C is more than the internal diameter of runner B, and connecting passage is additionally provided between runner C and runner B, connection stream
The internal diameter in road is gradually increased from runner B toward runner C directions.
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 homonymies and with arcwall B heteropleurals,
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 gradually increases from input terminal toward output terminal.
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 baffle ring A and baffle ring B, and impeller is equipped with baffle ring C, and baffle ring A is contradicted with placing the inner wall of annular groove, and baffle ring C terminates in baffle ring A
Between baffle ring B, and the internal diameter of baffle ring C is adapted with the outside diameter of baffle ring B.
By using above-mentioned technical proposal, beneficial effect：（1）Because the formation of interior circulation waterway is by water inlet and goes out
Pressure differential between the mouth of a river, and controlled during this part of pressure differential 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 of formation
Road is not in gap, and the continuity of circulation waterway in raising, improves lubrication and the effect of cooling；
（2）The structure setting of hollow duct, it is ensured that interior circulation waterway reduces impact to a certain extent in pump shaft part, in raising
The continuity of circulation waterway, and the pressure regulation sphere set in hollow duct, it is ensured that the plug in air exercise start shell side,
To when remaining water is discharged in pump, it is therefore prevented that current are sprayed because of overbottom pressure；
（3）The structure setting of pump head water outlet and water inlet, it is ensured that the pressure difference of formation ensure that interior in constant scope
The continuity of circulation waterway, improves lubrication and the effect of cooling；
（4）Pump head, which is equipped with, places annular groove, places annular groove and is equipped with baffle ring, improves impeller and possesses good oneself when rotated
Inhale effect.
A kind of operating method of hot water circuit canned motor pump, it is characterised in that following steps：（1）Working status：A. electricity is connected
Source, opens motor, 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, during motor impeller is rotating,
So that water inlet and water outlet form pressure difference, and circulation waterway in formation, interior circulating water flow provides cooling and lubricant effect；
（2）Shut down：When A. needing to shut down, the valve of water outlet is first gradually turned down, waits motor to be stopped, then turn off water inlet
Valve, finally by the valve of water outlet；
B. remaining water in excavationg pump：The plug of casing side is opened, remaining water in pump is discharged.
By using aforesaid operations method, beneficial effect：During switching on and shutting down, notice that the unlatching of water inlet valve and water outlet valve is suitable
Sequence, reduces the suction to air, and then improves the protection to canned motor pump.
Brief description of the drawings
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.
Reference numeral in figure, 1- pump heads, 10- water inlets, 101- arcwalls A, 102- arcwall B, 103- arcwall C, 11-
Water outlet, 12- place annular groove, 13- baffle rings, 130- baffle rings A, 131- baffle ring B, 2- pump shaft, 20- drainage lumens, 21- hollow flows
Road, 210- runners A, 211- runner B, 212- runner C, 213- connecting passage, 22- pressure regulation spheres, 3- impellers, 30- baffle rings C, 4-
Casing, 5- plugs.
Embodiment
A kind of hot water circuit canned motor pump embodiment of the present invention is described further with reference to Fig. 1.
Embodiment
A kind of hot water circuit canned motor pump, including pump head 1, be placed in pump head 1 impeller 3, be connected with impeller 3 pump shaft 2, use
In driving 2 rotating motor of pump shaft, the casing 4 for being placed on outside motor and being connected with pump head 1 and the wiring being arranged at outside pump head 1
Box, the structure of the motor is formed by stator, rotor and the housing that is arranged between stator and rotor, on pump head 1
Equipped with water inlet 10 and water outlet 11, interior circulation waterway is equipped with casing 4, the interior circulation waterway of formation is improved in right casing 4
The lubrication in portion and the effect of cooling, interior circulation waterway include drainage lumens 20, the hollow duct 21 being arranged in pump shaft 2 and set
In the pressure regulation sphere 22 in hollow duct 21, the side of drainage lumens 20 is connected with water outlet 11, and the opposite side of drainage lumens 20 is with
Empty runner 21 is connected, and the opposite side that hollow duct 21 connects side with drainage lumens 20 is connected with water inlet 11,4 side of casing
Equipped with the plug 5 being adapted with drainage lumens 20, pass through the pressure regulation sphere 22 set in hollow duct 21, it is ensured that to opening
The plug 5 of 4 side of casing, to when remaining water is discharged in pump, it is therefore prevented that current are sprayed because of overbottom pressure, and the axial direction of pump shaft 2 is long
Spend the ratio between the diameter of impeller 3 between 1.1-1.2, because canned motor pump has a different sizes, but the axis of pump shaft 2
Ratio between to the diameter of length and impeller 3 can ensure constant, and the factor that the axial length of pump shaft 2 influences is interior
The effective distance of circulation waterway, the factor that the diameter of impeller 3 influences are into and out the pressure difference that can be formed at the mouth of a river, therefore above-mentioned
Ratio is set, and the pressure difference of intake-outlet, which is in, can form interior circulation waterway and ensure constant state, it is ensured that interior recirculated water
The continuity on road, 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 outside diameter of pressure regulation sphere 22 is adapted with the internal diameter of runner C212, runner
The internal diameter of B211 is more than the internal diameter of runner A210, and the internal diameter of runner C212 is more 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 runner C212 directions
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, is followed in raising
The continuity in ring water route, and the pressure regulation sphere 22 set in hollow duct 21, it is ensured that in the stifled of 4 side of air exercise start shell
First 5, to when remaining water is discharged in pump, it is therefore prevented that current are 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 homonymies and with
Arcwall B102 heteropleurals, arcwall A101 and arcwall B102 are in outer male structure, and arcwall C103 is in concave inward structure, water outlet
11 inner wall is in concave inward structure, and water outlet 11 includes input terminal and output terminal, and the internal diameter of water outlet 11 is from input terminal toward output
The structure setting of end gradually increase, 1 water outlet of pump head and water inlet, it is ensured that the pressure difference of formation is in constant scope, Jin Erbao
The continuity of interior circulation waterway has been demonstrate,proved, has improved lubrication and the effect of cooling.
The present invention is further arranged to, and pump head 1, which is equipped with, places annular groove 12, places annular groove 12 and is equipped with baffle ring 13, keeps off
Stream ring 13 includes baffle ring A130 and baffle ring B131, and impeller 3 is equipped with baffle ring C30, baffle ring A130 and the inner wall for placing annular groove 12
Contradicting, baffle ring C30 is terminated between baffle ring A130 and baffle ring B131, and the internal diameter of baffle ring C30 is adapted with the outside diameter of baffle 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 possess when rotated it is good
Self-priming effect.
A kind of operating method of hot water circuit canned motor pump, it is characterised in that following steps：（1）Working status：A. electricity is connected
Source, opens motor, 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, during motor impeller is rotating,
So that water inlet and water outlet form pressure difference, and circulation waterway in formation, interior circulating water flow provides cooling and lubricant effect；
（2）Shut down：When A. needing to shut down, the valve of water outlet is first gradually turned down, waits motor to be stopped, then turn off water inlet
Valve, finally by the valve of water outlet；
B. remaining water in excavationg pump：The plug of casing side is opened, remaining water in pump is discharged.
During switching on and shutting down, the opening sequence of water inlet valve and water outlet valve is paid attention to, reduce the suction 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 in the range of technical solution of the present invention should all include within the scope of the present invention.
Claims (6)
1. a kind of hot water circuit canned motor pump, including pump head（1）, be placed in pump head（1）Interior impeller（3）With impeller（3）The pump of connection
Axis（2）, for driving pump shaft（2）Rotating motor, be placed on that motor is outer and and pump head（1）The casing of connection（4）And it is arranged at
Pump head（1）Outer terminal box, it is characterized in that：The pump head（1）It is equipped with water inlet（10）And water outlet（11）, casing（4）It is interior
Equipped with interior circulation waterway, interior circulation waterway includes drainage lumens（20）And it is arranged at pump shaft（2）Interior hollow duct（21）, it is hollow
Runner（21）It is interior to be equipped with pressure regulation sphere（22）, the drainage lumens（20）Side and water outlet（11）Connection, drainage lumens（20）'s
Opposite side and hollow duct（21）It is connected, hollow duct（21）With drainage lumens（20）Connect the opposite side and water inlet of side
（10）It is connected, the casing（4）Side is equipped with and drainage lumens（20）The plug being adapted（5）, the pump shaft（2）Axial direction it is long
Degree and impeller（3）Diameter between ratio between 1.1-1.2.
2. a kind of hot water circuit canned motor pump according to claim 1, it is characterized in that：The hollow duct（21）Including successively
The runner A of connection（210）, runner B（211）And runner C（212）, the pressure regulation sphere（22）It is placed in runner C（21）It is interior, and
Pressure regulation sphere（22）Outside diameter and runner C（212）Internal diameter be adapted, runner B（211）Internal diameter be more than runner A（210）It is interior
Footpath, runner C（212）Internal diameter be more than runner B（211）Internal diameter, and runner C（212）With runner B（211）Between the company of being additionally provided with
Connect runner（213）, connecting passage（213）Internal diameter by runner B（211）Toward runner C（212）Direction gradually increases.
3. a kind of hot water circuit canned motor pump according to claim 1 or 2, it is characterized in that：The water inlet（10）Including outer
Runner and inner flow passage, are equipped with arcwall A between outer flow passage and inner flow passage（101）With arcwall B（102）, inner flow passage is equipped with arc
Shape wall C（103）, arcwall A（101）With arcwall C（103）Homonymy and with arcwall B（102）Heteropleural, arcwall A（101）With
Arcwall B（102）It is in outer male structure, arcwall C（103）In concave inward structure.
4. 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
In concave inward structure, water outlet（11）Including input terminal and output terminal, and water outlet（11）Internal diameter from input terminal toward output terminal by
It is cumulative big.
5. a kind of hot water circuit canned motor pump according to claim 1, it is characterized in that：The pump head（1）It is equipped with and places ring
Groove（12）, place annular groove（12）It is equipped with baffle ring（13）, baffle ring（13）Including baffle ring A（130）And baffle ring B（131）, leaf
Wheel（3）It is equipped with baffle ring C（30）, baffle ring A（130）With placing annular groove（12）Inner wall contradict, baffle ring C（30）Terminate in baffle ring A
（130）With baffle ring B（131）Between, and baffle ring C（30）Internal diameter and baffle ring B（131）Outside diameter be adapted.
6. according to a kind of operating method of hot water circuit canned motor pump described in any one of claim 1-5, it is characterised in that such as
Lower step：（1）Working status：A. power on, open motor, motor impeller rotation, when outlet pressure meter reading reaches
At 1.2 times of rated head, outlet valve is slowly opened；
B. because being controlled the diameter of impeller and the axial length of pump shaft, during motor impeller is rotating,
So that water inlet and water outlet form pressure difference, and circulation waterway in formation, interior circulating water flow provides cooling and lubricant effect；
（2）Shut down：When A. needing to shut down, the valve of water outlet is first gradually turned down, waits motor to be stopped, then turn off water inlet
Valve, finally by the valve of water outlet；
B. remaining water in excavationg pump：The plug of casing side is opened, remaining water in pump is discharged.
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 true CN107917084A (en) | 2018-04-17 |
| CN107917084B 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 |
|---|---|
| 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 |
|---|---|
| CN107917084B (en) | 2019-06-14 |
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