CN107035696B - A kind of centrifugal pump - Google Patents
A kind of centrifugal pump Download PDFInfo
- Publication number
- CN107035696B CN107035696B CN201710492852.0A CN201710492852A CN107035696B CN 107035696 B CN107035696 B CN 107035696B CN 201710492852 A CN201710492852 A CN 201710492852A CN 107035696 B CN107035696 B CN 107035696B
- Authority
- CN
- China
- Prior art keywords
- impeller
- blades
- cover board
- pump housing
- back blades
- 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
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal 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
- F04D29/02—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
-
- 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
-
- 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a kind of centrifugal pumps, including main shaft, the internal pump housing and bearing parts for being equipped with impeller, the main shaft passes through the bearing parts and connect with the impeller, the pump housing is equipped with inlet port and outlet port, the impeller includes the first cover board that middle part is connect with main shaft, first cover board is evenly equipped with multiple primary blades towards the feed inlet on one side, and the first cover board is evenly equipped with multiple back blades backwards to feed inlet on one side, and back blades diameter is 1.05-1.30 times of main vane diameter.Centrifugal pump provided by the invention, sealing is more reliable, wearability is more preferable.
Description
Technical field
The present invention relates to centrifugal pumping apparatus fields more particularly to a kind of for conveying the centrifugal pump for having abrasive media.
Background technique
In ore dressing and metallurgy industry, often require that centrifugal pump conveying is some containing solid, liquid two-phase flow medium, these pumps are often met
To following two problem: one is wear problem, the second is the integrity problem of sealing.
The common method for solving abrasion is to common are rubber, high-chromium alloy etc. using wear-resisting material manufacture flow passage part.
Several sealing modes common at present are: mechanical seal, packing seal, sub-impeller seal.These types of sealing side
Formula respectively has an advantage and disadvantage, and the advantage of mechanical seal is that sealing effect is good, the disadvantage is that it is at high cost, and maintenance difficult；The knot of packing seal
Structure is simple, at low cost, but poor sealing effect, therefore, is seldom used alone on abrasion resisting pump at present；Currently applied on abrasion resisting pump
More is accessory impeller+filler combination sealing mode, and this sealing means under suitable conditions, can obtain preferable close
Effect is sealed, but under some operating conditions, the effect of the sealing means is often unable to satisfy job requirement, such as pump is high in small flow
When the operating point of lift, the lift of accessory impeller is often below the lift of impeller, if the pressure of sealing water is lower, medium is just by pressing
Water chamber takes turns to filling to accessory lobes, enters at filler, to damage filler and lead to seal failure.
It is that abrasion resisting pump commonly improves axis that back blades is arranged on the cover board (also referred to as back shroud) at sealing in impeller
The method of sealing effect, back blades on back shroud function as a unshrouded impeller, and lift largely depends on
The height in gap and back blades between back blades and the pump housing, theoretically the height of back blades is that the higher the better, and the pump housing
Gap be the smaller the better, but actually, from the perspective of technique and maintenance, the gap between back blades and the pump housing is too small
It is difficult to realize, even if realizing, since back blades is easily worn, effect can be also decreased obviously after accessory lobes pad wear.
After the height of back blades is greater than a certain value, continues growing height and the effect for improving lift is extremely limited, increase simultaneously
Adding the height of back blades will lead to, shaft power increases and the decline of the efficiency of pump, another aspect, the blade wear of unshrouded impeller relatively close
Formula impeller will seriously much, and the increase of back blades height can accelerate the abrasion of back blades and the pump housing.In practice, if back blades and
Gap between the pump housing is less than 2mm, and the lift that accessory impeller generates is just close to the highest lift that it can be generated.
Summary of the invention
The object of the present invention is to provide a kind of centrifugal pump, sealing is more reliable, wearability is more preferable.
To achieve the above object, the present invention provides a kind of centrifugal pump, including main shaft, the internal pump housing and bearing for being equipped with impeller
Parts, the main shaft pass through the bearing parts and connect with the impeller, and the pump housing is equipped with inlet port and outlet port, institute
Stating impeller includes the first cover board that middle part is connect with main shaft, and first cover board is multiple towards being evenly equipped on one side for the feed inlet
Primary blades, the first cover board are evenly equipped with multiple back blades backwards to feed inlet on one side, and back blades is around main-shaft axis rotational outer circumference
Diameter (also referred to as back blades diameter) is diameter (also referred to as main vane diameter) of the primary blades around main-shaft axis rotational outer circumference
1.05-1.30 again.
As a further improvement of the present invention, the exit installation angle of the primary blades is β 1, and the outlet of the back blades is pacified
Dress angle is β 2, and the β 2 is greater than β 1.
As a further improvement of the present invention, the height of the back blades is 4-40mm.
As a further improvement of the present invention, the accessory impeller connecting with main shaft, the impeller position are equipped in the pump housing
Between the accessory impeller and the feed inlet.
As a further improvement of the present invention, first cover board and primary blades use complex abrasion-proof material, in impeller
The part that portion is connect with the main shaft is equipped with the wheel hub of metal material, and the bone of metal material is equipped in the first cover board of impeller
Frame, the wheel hub are fixedly connected with each other with the skeleton.
As a further improvement of the present invention, the back blades uses complex abrasion-proof material, back blades, first lid
Plate and primary blades three are an integral molding structure.
As a further improvement of the present invention, the material of the back blades is ceramics, hard alloy, diamond composition
One of or several combination, the back blades are embedded on first cover board.
As a further improvement of the present invention, the pump housing includes first pump housing and second pump housing mutually fastened, institute
It states feed inlet to be arranged on first pump housing, is respectively equipped with the first liner and the second liner on the inside of first pump housing and second pump housing,
First liner and the second liner are complex abrasion-proof material.
As a further improvement of the present invention, lining is equipped with multiple first wear plates in first liner and second,
One face of first wear plate is arranged on the flow-passing surface of the first liner and the second liner, and the first wear plate is ceramic, hard
One of or several combination of matter alloy, diamond composition.
As a further improvement of the present invention, the working face of the primary blades be equipped with the second wear plate, described second
The material of wear plate is one of or several combination of ceramics, hard alloy, diamond composition.
Beneficial effect
Compared with prior art, the advantages of centrifugal pump of the invention are as follows:
1, back blades is provided on the first cover board of impeller, back blades diameter is 1.05-1.30 times of main vane diameter, by
The lift that generates in back blades and primary blades and its diameter it is square directly proportional, back blades can be allowed to generate higher raise in this way
Journey, be conducive to prevent medium from the gap between the first cover board and the pump housing to axle envelope from it is mobile；Certainly, back blades diameter is continued
Increase, such as larger than the 1.3 of main vane diameter times when, sealing effect can be more preferable, but will cause the efficiency of pump and lift is decreased obviously,
To lose application value in practice；
2, the height of back blades is too small, and the lift that when work generates is insufficient, but height is too high, while increasing energy consumption,
Also it will increase the abrasion of back blades and the pump housing, therefore the height of back blades should be between 3-40mm, optimal height is in 4-
20mm；
3, the exit installation angle degree of blade is affected to efficiency and lift, and biggish exit installation angle can produce higher
Lift, but often efficiency is lower, and lesser exit installation angle is conducive to improve efficiency, but will lead to lift decline, setting
When make back blades exit installation angle be greater than primary blades exit installation angle, can while improving back blades lift, guarantee
It has higher efficiency；
4, it after accessory impeller is set, is equivalent to accessory impeller and back blades forms a concatenated pumping installations, can get higher
Lift, be beneficial to prevent medium from sealing place and rush down leakage；
5, complex abrasion-proof material has the wearability more much higher than antifriction alloy or rubber, and impeller uses complex abrasion-proof material system
It makes, is conducive to the wearability for improving impeller, can especially greatly improve the wearability for the back blades being easily worn, prevent back blades
Because premature wear causes the gap between back blades and the pump housing to dramatically increase, to make the obvious decline of the lift of back blades；
6, the mechanical strength of composite abrasion resistance material is insufficient, by the way that the wheel hub and skeleton of metal material are arranged in impeller, from
And improve the mechanical strength of impeller；
7, it pumps intracorporal first liner and the second liner is composite abrasion resistance material layer, the wearability of the pump housing can be made significant
It improves, to make the service life for extending the pump housing, while preventing the gap between back blades and the pump housing from increased dramatically and reduce back blades
The lift of generation；
8, the first wear plate can further improve the wearability of the pump housing；
9, the second wear plate can further improve the wearability of primary blades；
10, ceramic material is set by back blades material, and be embedded into the complex abrasion-proof material, it can be further
Improve the wearability of back blades.
Through the following description and in conjunction with the attached drawings, the present invention will become more fully apparent, these attached drawings are used to explain the present invention
Embodiment.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the front section view of centrifugal pump in embodiment 1；
Fig. 2 is the perspective view of impeller in embodiment 1；
Fig. 3 is the side view of primary blades in embodiment 1；
Fig. 4 is the side view of back blades in embodiment 1；
Fig. 5 is the front section view of 1 impeller of embodiment；
Fig. 6 is the front section view of first pump housing in embodiment 2；
Fig. 7 is the front section view of impeller in embodiment 2.
Specific embodiment
The embodiment of the present invention is described referring now to the drawings.
Embodiment 1
A specific embodiment of the invention is as shown in Figures 1 to 5, a kind of centrifugal pump, including main shaft 1, inside are equipped with impeller 8
The pump housing and bearing parts 2, the main shaft 1 passes through and the bearing parts 2 and connect with the impeller 8, and the pump housing is equipped with
Feed inlet 9 and discharge port 10, the impeller 8 include the first cover board 81 that middle part is connect with main shaft 1,81 direction of the first cover board
The feed inlet 9 is evenly equipped with multiple primary blades 82 on one side, and the first cover board 81 is evenly equipped with multiple accessory lobes backwards to feed inlet 9 on one side
Piece 83,83 diameter of back blades are 1.05-1.30 times of 82 diameter of primary blades.
Primary blades 82 on impeller 8 are enclosed or semi-open type structure, and in the present embodiment, primary blades 82 are closed type structure, leaf
Wheel 8 further includes the second cover board 84 connecting with each primary blades 82, and the second cover board 84 is parallel to each other with the first cover board 81, primary blades 82
Between the second cover board 84 and the first cover board 81.When primary blades 82 are semi-open type structure, impeller 8 does not include the second cover board
84。
The exit installation angle of the primary blades 82 is β 1, and the exit installation angle of the back blades 83 is β 2, and the β 2 is greater than β
1。
The height of the back blades 83 is 4-40mm.
The accessory impeller 3 connecting with main shaft 1 is equipped in the pump housing, the impeller 8 is located at the accessory impeller 3 and the charging
Between mouth 9.
The first cover board 81 and primary blades 82 on the impeller 8 use complex abrasion-proof material, 8 middle part of impeller and the main shaft
The part of 1 connection is equipped with the wheel hub 11 of metal material, and the skeleton 12 of metal material, institute are equipped in the first cover board 81 of impeller 8
Wheel hub 11 is stated to be fixedly connected with each other with the skeleton 12.
The back blades 83 uses complex abrasion-proof material, and back blades 83, first cover board 81 and 82 three of primary blades are
Integrated formed structure.
The pump housing includes first pump housing 6 and second pump housing 5 mutually fastened, and the feed inlet 9 is arranged in first pump housing 6
On, the inside of first pump housing 6 and second pump housing 5 is respectively equipped with the first liner 4 and the second liner 7, first liner 4 and second
Liner 7 is complex abrasion-proof material.
The composition of the complex abrasion-proof material is abrasion resistant particles and resinoid bond, and the material of the wear-resisting pellet is carbonization
One of or several combination of silicon, corundum, zirconium oxide, garnet, silicon nitride.
In the present embodiment, the main component (weight) of complex abrasion-proof material are as follows: silicon carbide 60-90%, phenolic resin 10-
40%.
In the present embodiment, the diameter of the first cover board 81 and back blades 83 is 420mm, the diameter of primary blades 82 and the second lid
The diameter of plate 84 is 390mm, and the diameter of back blades 83 is 1.076 times of 82 diameter of primary blades, and the height of back blades 83 is
12mm。
The exit installation angle of blade, i.e., the angle of blade tangent line and outer circle tangent line at this at blade exit.In the present embodiment
In, the exit installation angle β 2 of back blades 83 is 45 °, and the exit installation angle β 1 of primary blades 82 is 38 °.
To detect sealing effect of the invention, a pressure vacuum gauge, the vacuum are installed in the present embodiment at the A of Fig. 1
Pressure gauge reflection is pressure at filler, and for convenient for comparing, comparison pump is different outer except impeller, remaining is whole identical, i.e., and the
For one group of data using impeller (being designated as impeller 1 in table) of the invention, second group of data is common impeller (the table acceptance of the bid used
For impeller 2), for two comparison impellers other than the first cover board 81 and back blades 83 are different, remaining size is identical, of the invention
First cover board 81 of impeller and the diameter of back blades 83 are 420mm, and common first cover board of impeller and the diameter of back blades are
390mm。
As can be seen from the above table, the present invention with respect to ordinary skill centrifugal pump, on the one hand due to the first cover board and back blades
Enlarged diameter, cause pump efficiency decline about 0.1%-0.2%, it should say that this amplitude is very little, on the other hand, in addition to
Outside 6th point, pressure of the present invention at any one operating condition dot encapsulation will be significantly lower than the centrifugal pump of ordinary skill, especially exist
Often run the 3rd to the 6th point of Pulp pump, is able to maintain zero-pressure or negative pressure, and ordinary skill is pressed at the 3rd dot encapsulation at sealing
Power has reached 0.06Mpa, illustrates that the present invention is fairly obvious to sealing effect is improved.
Embodiment 2
As shown in Figure 6 to 7, with the main difference of embodiment 1 in place of be, the material of the back blades 83 be ceramics,
One of or several combination of hard alloy, diamond composition, the back blades 83 are embedded in first cover board 81
On.
First liner 4 and the second liner 7 are equipped with multiple first wear plates 13, and one of first wear plate 13
Face is arranged on the flow-passing surface of the first liner 4 and the second liner 7, and the first wear plate 13 is ceramics, hard alloy, diamond composition
One of or several combination.
The working face of the primary blades 82 is equipped with the second wear plate 14, the material of second wear plate 14 be ceramics,
One of or several combination of hard alloy, diamond composition.
The diameter of the diameter of back blades 83 and the first cover board 81 is 740mm, and the diameter of primary blades 82 is 630mm, accessory lobes
83 diameter of piece is 1.17 times of 82 diameter of primary blades.
Certainly, in certain not serious operating conditions of abrasion, the materials such as high-chromium alloy, rubber manufacture impeller or pump can also be used
Body, to reduce manufacturing cost.
Combining most preferred embodiment above, invention has been described, but the invention is not limited to implementations disclosed above
Example, and various modifications, equivalent combinations according to the essence of the present invention should be covered.
Claims (9)
1. a kind of centrifugal pump, including main shaft (1), the internal pump housing and bearing parts (2) for being equipped with impeller (8), the main shaft (1)
It connect across the bearing parts (2) and with the impeller (8), the pump housing is equipped with feed inlet (9) and discharge port (10), special
Sign is, the impeller (8) includes the first cover board (81) that middle part is connect with main shaft (1), and first cover board (81) is towards institute
Being evenly equipped on one side multiple primary blades (82) for feed inlet (9) is stated, the first cover board (81) is more backwards to being evenly equipped on one side for feed inlet (9)
A back blades (83), the diameter of back blades (83) are 1.05-1.30 times of primary blades (82) diameter；The primary blades (82) go out
Mouth established angle is β 1, and the exit installation angle of the back blades (83) is β 2, and the β 2 is greater than β 1.
2. a kind of centrifugal pump according to claim 1, which is characterized in that the height of the back blades (83) is 4-40mm.
3. a kind of centrifugal pump according to claim 1, which is characterized in that be equipped in the pump housing and to be connect with main shaft (1)
Accessory impeller (3), the impeller (8) is between the accessory impeller (3) and the feed inlet (9).
4. a kind of centrifugal pump according to claim 1, which is characterized in that first cover board (81) and primary blades (82) are adopted
With complex abrasion-proof material, the part that impeller (8) middle part is connect with the main shaft (1) is equipped with the wheel hub (11) of metal material, in leaf
The skeleton (12) that metal material is equipped in first cover board (81) of (8) is taken turns, the wheel hub (11) and the skeleton (12) are mutually solid
It connects.
5. a kind of centrifugal pump according to claim 4, which is characterized in that the back blades (83) uses complex abrasion-proof material
Matter, back blades (83), first cover board (81) and primary blades (82) three are an integral molding structure.
6. a kind of centrifugal pump according to claim 4, which is characterized in that the material of the back blades (83) is ceramic, hard
One of or several combination of matter alloy, diamond composition, the back blades (83) are embedded in first cover board
(81) on.
7. according to claim 1 to a kind of centrifugal pump described in 6 any one, which is characterized in that the pump housing includes mutually detaining
First pump housing (6) and second pump housing (5) closed, the feed inlet (9) setting is on first pump housing (6), first pump housing (6) and the
The first liner (4) and the second liner (7), first liner (4) and the second liner (7) are respectively equipped on the inside of two pump housings (5)
It is complex abrasion-proof material.
8. a kind of centrifugal pump according to claim 7, which is characterized in that on first liner (4) and the second liner (7)
Equipped with multiple first wear plates (13), a face of first wear plate (13) is arranged in the first liner (4) and the second liner
(7) on flow-passing surface, the first wear plate (13) is one of or several group of ceramics, hard alloy, diamond composition
It closes.
9. according to claim 1 to a kind of centrifugal pump described in 6 any one, which is characterized in that the work of the primary blades (82)
Make face equipped with the second wear plate (14), the material of second wear plate (14) is ceramics, hard alloy, diamond composition
One of or several combination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710492852.0A CN107035696B (en) | 2017-06-26 | 2017-06-26 | A kind of centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710492852.0A CN107035696B (en) | 2017-06-26 | 2017-06-26 | A kind of centrifugal pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107035696A CN107035696A (en) | 2017-08-11 |
| CN107035696B true CN107035696B (en) | 2019-08-30 |
Family
ID=59541417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710492852.0A Active CN107035696B (en) | 2017-06-26 | 2017-06-26 | A kind of centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107035696B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108980099A (en) * | 2018-07-03 | 2018-12-11 | 浙江融乐环境科技有限公司 | A kind of semi-closed type water pump impeller |
| CN108980110A (en) * | 2018-09-06 | 2018-12-11 | 广州市拓道新材料科技有限公司 | A kind of interior lining of abrasion resisting pump body |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0395236A1 (en) * | 1989-04-27 | 1990-10-31 | A. Ahlstrom Corporation | Pump for separating gas from a fluid to be pumped |
| CN1192800A (en) * | 1995-06-05 | 1998-09-09 | A·阿尔斯特罗姆公司 | Method for controlling function of centrifugal pump and vacuum pump combination, and gas separating centrifugal pump |
| CN101943184A (en) * | 2009-07-06 | 2011-01-12 | 李豪 | Hydrodynamic and equilibrium combined seal for impeller of slurry pump |
| CN105927595A (en) * | 2016-06-28 | 2016-09-07 | 广州市拓道流体设备技术有限公司 | Cavitation prevention slurry pump |
| CN106837875A (en) * | 2017-04-13 | 2017-06-13 | 广州市拓道流体设备技术有限公司 | A kind of abrasion-proof slurry pump pump housing |
| CN207161338U (en) * | 2017-06-26 | 2018-03-30 | 广州市拓道流体设备技术有限公司 | A kind of centrifugal pump |
-
2017
- 2017-06-26 CN CN201710492852.0A patent/CN107035696B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0395236A1 (en) * | 1989-04-27 | 1990-10-31 | A. Ahlstrom Corporation | Pump for separating gas from a fluid to be pumped |
| CN1192800A (en) * | 1995-06-05 | 1998-09-09 | A·阿尔斯特罗姆公司 | Method for controlling function of centrifugal pump and vacuum pump combination, and gas separating centrifugal pump |
| CN101943184A (en) * | 2009-07-06 | 2011-01-12 | 李豪 | Hydrodynamic and equilibrium combined seal for impeller of slurry pump |
| CN105927595A (en) * | 2016-06-28 | 2016-09-07 | 广州市拓道流体设备技术有限公司 | Cavitation prevention slurry pump |
| CN106837875A (en) * | 2017-04-13 | 2017-06-13 | 广州市拓道流体设备技术有限公司 | A kind of abrasion-proof slurry pump pump housing |
| CN207161338U (en) * | 2017-06-26 | 2018-03-30 | 广州市拓道流体设备技术有限公司 | A kind of centrifugal pump |
Also Published As
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|---|---|
| CN107035696A (en) | 2017-08-11 |
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Effective date of registration: 20180323 Address after: 510000 room 1204, West Block 238, six road, Yuexiu District, Guangdong, Guangzhou, Zhongshan Applicant after: New Mstar Technology Ltd in Guangzhou Address before: 510180 Guangzhou, Guangzhou, Guangdong, Yuexiu District, Zhongshan No. six, No. 238, 1204 Applicant before: GUANGZHOU TOTALL FLUID EQUIPMENT TECHNOLOGY CO., LTD. |
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