CN106438380A - Detachable high pressure abrasion-resistant pump - Google Patents
Detachable high pressure abrasion-resistant pump Download PDFInfo
- Publication number
- CN106438380A CN106438380A CN201610798629.4A CN201610798629A CN106438380A CN 106438380 A CN106438380 A CN 106438380A CN 201610798629 A CN201610798629 A CN 201610798629A CN 106438380 A CN106438380 A CN 106438380A
- Authority
- CN
- China
- Prior art keywords
- pump
- pressure
- centrifugal impeller
- wear
- diffuser
- 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.)
- Pending
Links
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
- F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
-
- 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
- F04D29/02—Selection of particular materials
- F04D29/026—Selection of particular materials 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
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2205—Conventional flow pattern
- F04D29/2222—Construction and assembly
- F04D29/2227—Construction and assembly for special materials
-
- 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
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2261—Rotors specially for centrifugal pumps with special measures
- F04D29/2266—Rotors specially for centrifugal pumps with special measures for sealing or thrust balance
-
- 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
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2261—Rotors specially for centrifugal pumps with special measures
- F04D29/2294—Rotors specially for centrifugal pumps with special measures for protection, e.g. against abrasion
-
- 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
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/24—Vanes
- F04D29/242—Geometry, shape
-
- 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
- F04D29/4286—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps inside lining, e.g. rubber
-
- 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
- F04D29/448—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps bladed diffusers
-
- 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
Abstract
The invention relates to a detachable high pressure abrasion-resistant pump for conveying media containing solid particles. The detachable high pressure abrasion-resistant pump comprises a pressure-resistant pump shell which is provided with a feeding port, a discharging port and an installing port; and a pump cover is installed at the position of the installing port. The high pressure abrasion-resistant pump further comprises a centrifugal impeller installed in the pressure-resistant pump shell through the installing port, and a guide vane pressure expander; the media reach the centrifugal impeller through the feeding port, then are subjected to speed decreasing pressurization through the guide vane pressure expander and are conveyed to the discharging port; and the centrifugal impeller and the guide vane pressure expander are both made from an abrasion-resistant material. According to the detachable high pressure abrasion-resistant pump, the guide vane pressure expander separates the pressure expanding function of the pump shell from the pressure bearing function of the pump shell by means of the characteristics that the media are high in pressure and contain the solid particles, and the pressure expanding function is borne by the guide vane pressure expander; and after being subjected to pressure expanding through the guide vane pressure expander, high speed liquid flow enters a flow channel where the discharging port of the pump shell is located, the flowing speed is decreased, scouring on the inner wall of the pump shell is not caused any more, and therefore the pump shell only bears the pressure bearing function. The detachable high pressure abrasion-resistant pump is convenient to install and detach and low in casting cost, the maintaining cost is reduced, and the equipment running reliability is improved.
Description
Technical field
The invention belongs to centrifugal pump field, it is specifically related to a kind of detachable for the medium containing solid particle for the conveying
High-pressure anti-wear pump.
Background technology
It is currently used for conveying the pump that used of the medium containing solid particle and generally include pump case and be installed on described pump
Ordinary Centrifugal Pumps in shell, described pump case is provided with charging aperture, discharging opening and the installation for installing described Ordinary Centrifugal Pumps
Mouthful.In order to reduce the abrasion to pump case for the solid particle in medium, described Ordinary Centrifugal Pumps need using high-abrasive material or built-up welding
Wearable hard alloy material casts, and the service life of this Ordinary Centrifugal Pumps is short, and live built-up welding is difficult to real from technology and technique
Existing；In addition described Ordinary Centrifugal Pumps are installed in described pump case it is required that the volute outlet axis of described Ordinary Centrifugal Pumps and institute
The discharging opening diameter parallel stating pump case is to ensure that in medium, solid particle will not cause secondary abrasion, actual installation to pump housing endophragm
During, described Ordinary Centrifugal Pumps are installed in described housing by described installing port and are not easy to realize, described common from
The volute outlet axis of heart pump is easy to deflection, lead to from volute outlet output medium solid particle still can be to pump housing endophragm
Cause to wear and tear.
Content of the invention
In order to solve above-mentioned technical problem, the present invention provides a kind of detachable high-pressure anti-wear pump.
In order to realize the purpose of the present invention, present invention employs technical scheme below：
A kind of detachable high-pressure anti-wear pump, including pressure pump case, described pressure pump case be provided with charging aperture, discharging opening and
Installing port, is provided with pump cover at described installing port, and this high-pressure anti-wear pump also includes being arranged on by described installing port described pressure
Centrifugal impeller in pump case and stator diffuser, medium reaches through described charging aperture and is expanded by described stator after described centrifugal impeller
Depressor slows down and is pressurized and is delivered to described discharging opening, and described centrifugal impeller, stator diffuser are constituted by high-abrasive material.
Further technical scheme, described pump cover medial surface is provided with wear-resistant liner, and described stator diffuser is in cone cylinder shape, institute
State stator diffuser one end and described charging aperture place channel connection, it is resistance to described that the described stator diffuser other end passes through screw
Mill liner, pump cover are fixed as one；Described centrifugal impeller is located in described stator diffuser, sets at described stator diffuser inwall
There is the media transport path being made up of stator.
Further technical scheme, the gap location between described centrifugal impeller front shroud and stator diffuser inwall is provided with many
Individual the first secondary blades being sequentially arranged in along centrifugal impeller circumference on front shroud, described centrifugal impeller back shroud is wear-resisting with described
Gap location between liner is provided with multiple second subprime blades being sequentially arranged on back shroud along centrifugal impeller circumference.
Further technical scheme, described first secondary blades are in crescent or triangle and close described choma arrangement,
Described second subprime blade is triangular in shape and arranges near centrifugal impeller wheel hub, and the installing hole on described wear-resistant liner is in and institute
State toroidal and the close pump cover one lateral aperture minimum that second subprime blade shape is adapted.
Further technical scheme, described first secondary blades are in crescent or triangle, and described second subprime blade is in
Triangle, the installing hole on described wear-resistant liner is in the tubaeform and close centrifugation being adapted with described second subprime blade shape
Wheel backface one lateral aperture is maximum.
Further technical scheme, described pump shaft by side by side and positioned adjacent for strengthening pump shaft driving force three axles
Hold common support.
The beneficial effects of the present invention is：
(1) the stator diffuser that the present invention adopts is directed to medium high pressure and the feature with solid particle, pump from structure
The diffusion function of shell separates with pressure-bearing function, and diffusion function is undertaken by stator diffuser, and high speed liquid flow passes through stator diffuser
Pump case discharging opening place runner is entered, flow velocity reduces, no longer pump housing endophragm is caused to wash away, therefore pump case only undertakes after diffusion
Pressure-bearing function.Due to the separation of function, the selection of pump case is mainly from the point of view of pressure-bearing, and centrifugal impeller, stator diffuser
The correlated parts that these are contacted with high speed liquid flow adopt high-abrasive material to process, the different choosings according to media components and containing granule density
With suitable material and carry out strict process, substantially prolongs the service life of wear part, user's maintenance also extremely convenient
(changing spare part after abrasion can be it is not necessary to reprocess processing), the maintenance and repair expense of so this equipment will substantially reduce it is important to set
Standby operational reliability, safety greatly improve.The present invention is easily installed dismounting, small volume, casts low cost, efficiency high.This
Bright it is applied to Coal Chemical Industry Quench water pump, for conveying the severe corrosives such as concentrated sulphuric acid and the medium of the easy passivation such as ordinary carbon steel.
(2) for conveying high-pressure and during the medium with solid particle, medium enters into institute from described charging aperture to the present invention
State in centrifugal impeller, and exported by described discharging opening after the deceleration supercharging of stator diffuser.Described stator diffuser does not integrally hold
The i.e. medium that is stressed is little and of substantially equal to the active force of stator diffuser inwall, outer wall.Described centrifugal impeller, stator diffusion
Device, wear-resistant liner all have high-abrasive material to constitute, even if solid particle weares and teares in these wear parts are by medium, by described peace
Described centrifugal impeller, stator diffuser, wear-resistant liner are pulled down and are changed by dress mouth, very convenient；In addition described centrifugal impeller,
Stator diffuser, wear-resistant liner protect described inner walls not frayed well.
(3) choma of the present invention not only makes centrifugal impeller and stator diffuser inwall form sealing cooperation, also has
Protect centrifugal impeller so that the effect do not worn and torn by stator diffuser of centrifugal impeller, substantially increase the operational reliability of pump.
(4), in normal operation, in pumped (conveying) medium, solid particle can be from centrifugal impeller front shroud and stator diffusion for described pump
Gap location between device inwall falls after rise to choma, or falls into centrifugation between centrifugal impeller back shroud and wear-resistant liner at gap
At impeller hub, until cause centrifugal impeller cannot normal work, the present invention pass through arrange the first secondary blades, second subprime leaf
Piece solves the problems referred to above, can produce due to when described first secondary blades, second subprime blade rotate with centrifugal impeller
Raw centrifugal flow simultaneously acts on described fixing granule and avoids accumulation in described gap for the solid particle, further ensure that institute
State the operational reliability of pump.
Brief description
Fig. 1 is present configuration schematic diagram.
Fig. 2 is centrifugal impeller structure schematic diagram.
Fig. 3 is stator diffuser structure schematic diagram.
Fig. 4 is wear-resistant liner structural representation.
In accompanying drawing, the implication of labelling is as follows：
10- is pressure pump case 11- charging aperture 12- discharging opening 13- pump cover 14- wear-resistant liner
141- installing hole 20- centrifugal impeller 21- choma 22- the first secondary blades
23- second subprime blade 30- stator diffuser 31- transfer passage 40- pump shaft 50- bearing
Specific embodiment
With reference to embodiment, more specific detail is made to technical solution of the present invention：
The present invention includes pressure pump case 10, and described pressure pump case 10 is provided with charging aperture 11, charging aperture 11 and installing port,
Pump cover 13 is installed at described installing port, this high-pressure anti-wear pump also includes being arranged on described pressure pump case 10 by described installing port
Interior centrifugal impeller 20 and stator diffuser 30, medium reaches through described charging aperture 11 and is led by described after described centrifugal impeller 20
Leaf diffuser 30 slows down and is pressurized and is delivered to described discharging opening 12, and described centrifugal impeller 20, stator diffuser 30 are by wear-resisting material
Material is constituted.Described pump cover 13 be bolted with described pump case 10 on.The stator diffuser 30 that the present invention adopts is directed to medium
High pressure and the feature with solid particle, separate the diffusion function of pump case from structure with pressure-bearing function, and diffusion function is passed through to lead
Leaf diffuser 30 undertakes, and high speed liquid flow enters pump case 10 discharging opening place runner after stator diffuser 30 diffusion, and flow velocity is
Reduce, no longer pump case 10 inwall is caused to wash away, therefore pump case 10 only undertakes pressure-bearing function.Due to the separation of function, pump case 10
Selection mainly from the point of view of pressure-bearing, and these correlations of contacting with high speed liquid flow of centrifugal impeller 20, stator diffuser 30
Part adopts high-abrasive material to process, and the difference according to media components and containing granule density from suitable material and carries out strict
Process, substantially prolongs the service life of wear part, user's maintenance also extremely convenient (change after abrasion spare part can it is not necessary to
Reprocess processing), the maintenance and repair expense of so this equipment will substantially reduce it is important to equipment operational reliability, safety significantly
Improve.The present invention is easily installed dismounting, small volume, casts low cost, efficiency high.
Described pump cover 13 medial surface is provided with wear-resistant liner 14, and described stator diffuser 30 is in cone cylinder shape, described stator diffusion
Device 30 one end and described charging aperture 11 place channel connection, it is wear-resisting interior with described that described stator diffuser 30 other end passes through screw
Lining 14, pump cover 13 are fixed as one；Described centrifugal impeller 20 is located in described stator diffuser 30, in described stator diffuser 30
It is provided with the media transport path 31 being made up of stator at wall.The present invention for conveying high-pressure and during the medium with solid particle,
Medium enters into described centrifugal impeller 20 from described charging aperture 11, and by described discharging after stator diffuser 30 deceleration supercharging
Mouth 12 output.It is the active force to stator diffuser 30 inwall, outer wall for the medium that described stator diffuser 30 entirety is not subject to pressure
Little and of substantially equal.Described centrifugal impeller 20, stator diffuser 30, wear-resistant liner 14 all have high-abrasive material to constitute, when these are resistance to
Even if mill part is worn and torn by solid particle in medium, by described installing port by described centrifugal impeller 20, stator diffuser 30, resistance to
Mill liner 14 is pulled down and is changed, very convenient；In addition described centrifugal impeller 20, stator diffuser 30, wear-resistant liner 14 are fine
Protect described housing 10 inwall not frayed.
Described centrifugal impeller 20 axis and the dead in line of described stator diffuser 30, described centrifugal impeller 20 front be provided with
The choma 21 of described stator diffuser 30 inner wall sealing cooperation；Described wear-resistant liner 14, pump cover 13 are provided with and pass through for pump shaft 40
Installing hole, described pump shaft 40 passes through installing hole fixing with described centrifugal impeller 20.Choma 21 of the present invention not only make from
Lobus cardiacus wheel 20 and stator diffuser 30 inwall form sealing cooperation, also have protect centrifugal impeller 20 make centrifugal impeller 20 not by
The effect of stator diffuser 30 abrasion, substantially increases the operational reliability of pump.
Gap location between described centrifugal impeller 20 front shroud and stator diffuser 30 inwall be provided with multiple along centrifugal impeller
20 circumferences are sequentially arranged in the first secondary blades 22 on front shroud, described centrifugal impeller 20 back shroud and described wear-resistant liner 14
Between gap location be provided with multiple second subprime blades 23 being sequentially arranged on back shroud along centrifugal impeller 20 circumference.Described
One secondary blades 22 are in crescent or triangle and close described choma arrangement, and described second subprime blade 23 is triangular in shape and leans on
Nearly centrifugal impeller wheel hub arrangement, the installing hole on described wear-resistant liner is in be adapted with described second subprime blade 23 shape
Toroidal and close pump cover one lateral aperture minimum., in normal operation, in pumped (conveying) medium, solid particle can be from centrifugation for described pump
Gap location between impeller 20 front shroud and stator diffuser 30 inwall falls after rise to choma 21, or from centrifugal impeller 20 back shroud
Fall into centrifugal impeller 20 wheel hub at gap and wear-resistant liner 14 between, until cause centrifugal impeller 20 cannot normal work, this
Invention is by arranging the first secondary blades 22, second subprime blade 23 solves the problems referred to above, due to described first secondary blades
22nd, second subprime blade 23 can produce centrifugal flow and act on described fixing granule simultaneously when rotating with centrifugal impeller 20
Avoid accumulation in described gap for the solid particle, further ensure that the operational reliability of described pump.
Claims (6)
1. a kind of detachable high-pressure anti-wear pump it is characterised in that：Including pressure pump case (10), described pressure pump case (10) is provided with
Charging aperture (11), discharging opening (12) and installing port, are provided with pump cover (13) at described installing port, this high-pressure anti-wear pump also includes
It is arranged on centrifugal impeller (20) and the stator diffuser (30) in described pressure pump case (10), medium warp by described installing port
Being slowed down by described stator diffuser (30) after described charging aperture (11) the described centrifugal impeller of arrival (20), it is described to be pressurized and be delivered to
Discharging opening (12), described centrifugal impeller (20), stator diffuser (30) are constituted by high-abrasive material.
2. as claimed in claim 1 detachable high-pressure anti-wear pump it is characterised in that：Described pump cover (13) medial surface is provided with wear-resisting
Liner (14), described stator diffuser (30) is in cone cylinder shape, described stator diffuser (30) one end and described charging aperture (11) institute
In channel connection, described stator diffuser (30) other end is fixed as with described wear-resistant liner (14), pump cover (13) by screw
Integrally；Described centrifugal impeller (20) be located at described stator diffuser (30) in, be provided with described stator diffuser (30) inwall by
The media transport path (31) that stator is constituted.
3. as claimed in claim 2 detachable high-pressure anti-wear pump it is characterised in that：Described centrifugal impeller (20) axis with described
Stator diffuser (30) dead in line, described centrifugal impeller (20) front is provided with is joined with described stator diffuser (30) inner wall sealing
The choma (21) closing；Described wear-resistant liner (14), pump cover (13) are provided with the installing hole passing through for pump shaft (40), described pump shaft
(40) pass through installing hole fixing with described centrifugal impeller (20).
4. as claimed in claim 3 detachable high-pressure anti-wear pump it is characterised in that：Described centrifugal impeller (20) front shroud with lead
Gap location between leaf diffuser (30) inwall is provided with and multiple is sequentially arranged on front shroud the along centrifugal impeller (20) circumference
One secondary blades (22), the gap location between described centrifugal impeller (20) back shroud and described wear-resistant liner (14) is provided with multiple edges
Centrifugal impeller (20) circumference is sequentially arranged in the second subprime blade (23) on back shroud.
5. as claimed in claim 4 detachable high-pressure anti-wear pump it is characterised in that：Described first secondary blades (22) are in crescent moon
Shape or triangle and near described choma arrangement, described second subprime blade (23) is triangular in shape and near centrifugal impeller wheel hub
Arrangement, the installing hole on described wear-resistant liner is in the toroidal adaptable with described second subprime blade (23) shape and close
Pump cover one lateral aperture is minimum.
6. as claimed in claim 4 detachable high-pressure anti-wear pump it is characterised in that：Described pump shaft (40) is by side by side and adjacent cloth
The common support of for strengthening pump shaft driving force three bearings (50) put.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610798629.4A CN106438380A (en) | 2016-08-31 | 2016-08-31 | Detachable high pressure abrasion-resistant pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610798629.4A CN106438380A (en) | 2016-08-31 | 2016-08-31 | Detachable high pressure abrasion-resistant pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106438380A true CN106438380A (en) | 2017-02-22 |
Family
ID=58164251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610798629.4A Pending CN106438380A (en) | 2016-08-31 | 2016-08-31 | Detachable high pressure abrasion-resistant pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106438380A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107120314A (en) * | 2017-06-02 | 2017-09-01 | 哈尔滨电气动力装备有限公司 | Axle envelope formula core main pump pumping chamber |
| CN109058123A (en) * | 2018-09-25 | 2018-12-21 | 彭定泽 | A kind of water pump selection formula flow-guiding structure |
| CN117020503A (en) * | 2023-10-09 | 2023-11-10 | 云南流体规划研究院有限公司 | Concentrated sulfuric acid submerged energy-saving pump impeller welding device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107120314A (en) * | 2017-06-02 | 2017-09-01 | 哈尔滨电气动力装备有限公司 | Axle envelope formula core main pump pumping chamber |
| CN109058123A (en) * | 2018-09-25 | 2018-12-21 | 彭定泽 | A kind of water pump selection formula flow-guiding structure |
| CN117020503A (en) * | 2023-10-09 | 2023-11-10 | 云南流体规划研究院有限公司 | Concentrated sulfuric acid submerged energy-saving pump impeller welding device |
| CN117020503B (en) * | 2023-10-09 | 2023-12-22 | 云南流体规划研究院有限公司 | Concentrated sulfuric acid submerged energy-saving pump impeller welding device |
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Application publication date: 20170222 |