CN104806561B - Adjustable pump with adjusting device for widening impeller outlet - Google Patents
Adjustable pump with adjusting device for widening impeller outlet Download PDFInfo
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- CN104806561B CN104806561B CN201410544878.1A CN201410544878A CN104806561B CN 104806561 B CN104806561 B CN 104806561B CN 201410544878 A CN201410544878 A CN 201410544878A CN 104806561 B CN104806561 B CN 104806561B
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- impeller
- pump
- blade
- adjusting means
- alar part
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Abstract
The invention provides an adjustable pump with an adjusting device for widening an impeller outlet. The adjustable pump with the adjusting device for widening the impeller outlet comprises a driving shaft, an impeller sleeves at the driving shaft, two elastic pieces respectively and symmetrically arranged at both sides of the impeller and a pressure module; the impeller comprises a first impeller and a second impeller which are meshed to each other; the pressure module drives the first impeller and/or the second impeller to move along the axial direction of the driving shaft so as to adjust the space between two impellers.
Description
Technical field
The present invention relates to pump class, widen the tunable pump of impeller outlet adjusting means particularly to a kind of band.
Background technology
Pump is at work in order to adapt to different working conditions it is often necessary to convert flow and the pressure of pump output, impact
The oneself factor of the flow of pump output and pressure mainly has two：One is the rotating speed of impeller；Two is the width of impeller.But, mesh
The front flow changing pump output on the market and pressure are mainly realized by the method changing wheel speed, and also do not occur one
Plant and change the output flow of pump and the scheme of pressure by adjusting the width of impeller.
Content of the invention
Based on the problems referred to above, the present invention provides a kind of band to widen the tunable pump of impeller outlet adjusting means.
Described band widen impeller outlet adjusting means tunable pump include drive shaft, the impeller being sheathed on described drive shaft,
Two elastic components and modular pressure, described impeller includes intermeshing first impeller and the second impeller, and described two elastic components are respectively
It is symmetricly set in described impeller both sides, described modular pressure drives described first impeller and/or described second impeller along described drive
Moving axis axial direction movement is to adjust the spacing between two impellers.
In a preferred embodiment of the present invention, described modular pressure drives described first impeller and described second impeller edge
Described drive shaft synchronous backward movement is to adjust the spacing between two impellers.
In a preferred embodiment of the present invention, the outside wall surface of described drive shaft is provided with a raised circle, described first impeller
Be respectively cooperating with being arranged at described raised circle both sides with the second impeller and cooperatively form cavity, described modular pressure include hydraulic tube and
Delivery hole, described delivery hole connects described hydraulic tube and described cavity.
In a preferred embodiment of the present invention, the tunable pump that impeller outlet adjusting means widened by described band also includes two limits
Position interstage sleeve, described two spacing interstage sleeve fixed covers located at described drive shaft and the symmetrical interval setting of relatively described impeller, described elasticity
Part elastic clip is between described impeller and described spacing interstage sleeve.
In a preferred embodiment of the present invention, described first impeller includes the first wheel disc and array distribution in described first
Multiple first blades of wheel disc one side surface, every one first blade is included in stepped first alar part and the second alar part；
Described second impeller includes the second wheel disc and array distribution in multiple second blades of described second wheel disc one side surface, and every 1
Two blades include in stepped three wings part and the 4th alar part, the plurality of first blade and the plurality of second blade
Correspond setting, the first alar part of wherein said first blade is corresponding with the 4th alar part of described second blade, institute
The second alar part stating the first blade is corresponding with the flap portion split-phase of described second blade.
In a preferred embodiment of the present invention, described first blade and described second blade are arc shaped blade, described
The cascaded surface that first alar part and the second alar part are formed is located at the back side of described first blade, described three wings part and the
The cascaded surface that four alar parts are formed is located at the upstream face of described second blade.
In a preferred embodiment of the present invention, described second alar part is from described first alar part towards away from described first
The direction of wheel disc extends and is formed, and its radial thickness is less than the radial thickness of described first alar part, and described 4th alar part is certainly
Described three wings part extends towards the direction away from described second wheel disc and is formed, and its radial thickness is less than described three wings part
Radial thickness.
In a preferred embodiment of the present invention, the tunable pump that impeller outlet adjusting means widened by described band also includes pump
Shell, described drive shaft runs through described pump case, and described pump case includes the pump housing and pump cover, and the described pump housing is provided with fluid intake and fluid goes out
Mouth, the described pump housing and the cooperation of described pump cover limit the cavity housing described impeller, and described impeller is housed in described cavity, and
According to direction initialization rotation, to drive fluid to flow to fluid issuing from fluid intake.
In a preferred embodiment of the present invention, described hydraulic tube is blind pipe.
The band that the present invention provides widens the tunable pump of impeller outlet adjusting means by improving to impeller, and impeller is set
It is set to intermeshing first impeller and the second impeller, and be provided with described first impeller of driving and/or described second impeller along institute
State drive shaft axial direction movement to adjust the modular pressure of the spacing between two impellers, thus adjusting the width of whole impeller,
To realize the control to output flow and pressure, overcome the output all the time failing to change pump by adjusting impeller width
Flow and the defect of pressure.And structure is simple, easy for operation, can adjust at any time in its running output flow and
Pressure, and do not affect the efficiency of pump.
Brief description
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, will make to required in embodiment description below
Accompanying drawing be briefly described it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, can also be obtained other according to these accompanying drawings
Accompanying drawing, wherein：
Fig. 1 is that the stereochemical structure of tunable pump one preferred embodiment that impeller outlet adjusting means widened by band of the present invention is illustrated
Figure；
Fig. 2 is the partial exploded view of the tunable pump that impeller outlet adjusting means widened by band shown in Fig. 1；
Fig. 3 is the structural representation of the tunable pump impeller that impeller outlet adjusting means widened by band shown in Fig. 1；
Fig. 4 is that elastic component shown in Fig. 1 does not produce partial sectional view during elastic deformation；
Fig. 5 is the partial sectional view that elastic component shown in Fig. 1 produces during maximum flexibility deformation.
Specific embodiment
The enforcement it is clear that described will be clearly and completely described to the technical scheme in the embodiment of the present invention below
Example is only a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, this area is common
All other embodiment that technical staff is obtained under the premise of not making creative work, broadly falls into the model of present invention protection
Enclose.
See also Fig. 1 to Fig. 5, the embodiment of the invention discloses the adjustable of impeller outlet adjusting means widened by a kind of band
Pump, the tunable pump 100 that impeller outlet adjusting means widened by described band includes pump case (non-label), drive shaft 2, impeller 3, limiting block
Set 4, fixed cover 5, elastic component 6, modular pressure (non-label), bearing holder (housing, cover) assembly 7, end cap 8 and motor (not shown), wherein
Described spacing interstage sleeve 4, fixed cover 5, elastic component 6, bearing holder (housing, cover) assembly 7 and end cap 8 are all arranged in pairs, respectively with described impeller 3
Central Symmetry is arranged at described impeller 3 both sides.
Described pump case includes the pump housing 11 and pump cover 12.The described pump housing 11 is provided with fluid intake 112 and fluid issuing 111.
The described pump housing 11 and described pump cover 12 cooperation limit the cavity (non-label) housing described impeller 3.Described impeller 3 is housed in described
In cavity, and according to direction initialization rotation, to drive fluid to be transferred to fluid issuing 111 from described fluid intake 112.
Described drive shaft 2 is the cylinder-shaped shaft of an elongated rod shape, and its one end is connected to described by drive chain or drive belt
On motor, the other end runs through described pump case, and fixing with the described pump housing 11 by described bearing holder (housing, cover) assembly 7 and end cap 8.Institute
State drive shaft 2 under the driving effect of described motor, do the circular motion of direction initialization.Described drive shaft 2 interlude
Outer wall surface is provided with a raised circle 21.
Described impeller 3 is sheathed on described drive shaft 2 and is housed in described cavity.Described impeller 3 includes engaging each other and sets
The first impeller 31 put and the second impeller 32, the two engagement sleeves is located at raised circle 21 both sides of described drive shaft 2 and sheathed described
Raised circle 21.
Please refer to Fig. 3 again, be the structural representation of the tunable pump impeller that impeller outlet adjusting means widened by band shown in Fig. 1
Figure.Described first impeller 31 includes the first wheel disc 311, is located at the hub structure 312 at described first wheel disc 311 center and spaced apart
Multiple first blades 313 in described first wheel disc 311 1 side surface.Described first impeller 31 passes through 312 sets of described hub structure
It is located in described drive shaft 2.Described hub structure 312 includes being sized to sternly leakproof fit with the diameter of described drive shaft 2
One hole position (non-label) and the second hole position (non-label) with diameter greater than described first hole position diameter.Described first hole position and second
Hole position is concentric through hole.The internal face of described second hole position is inclined-plane.Described hub structure 312 is preferably bonded by positioning
Connect, described positioning key drives described first impeller 31 to rotate together with described drive shaft 2.Described first blade 313 is to described
The arc shaped blade of hub structure 312 bending.Every one first blade 313 is included in stepped first alar part 3131 and the second alar part
Divide 3132.Described two alar parts 3132 extend shape from described first alar part 3131 towards the direction away from described first wheel disc 311
Become, and its radial thickness is less than the radial thickness of described first alar part 3132.Described first alar part 3131 and the second alar part
Divide the back side positioned at described first blade 313 for the cascaded surfaces of 3132 formation.Described first blade 313 can be with the described first round
Disk 311 is integrally formed it is also possible to be welded and fixed with described first wheel disc 311.
The structure of described second impeller 32 is similar to described first impeller 31, and it includes the second wheel disc 321, is located at described the
The hub structure 322 at two wheel disc 321 center and multiple second blades 323 in described second wheel disc 321 1 side surface spaced apart.
Described second impeller 32 is set in described drive shaft 2 by described hub structure 322.Described hub structure 322 includes size setting
It is threeth hole position (non-label) sternly leakproof fit with the diameter of described drive shaft 2 and with diameter greater than described 3rd hole position diameter
Four hole positions (non-label).Described 3rd hole position and the 4th hole position are concentric through hole.The internal face of described 4th hole position is oblique
Face.Described hub structure 322 is preferably bonded by positioning, and described positioning key drives described second impeller 32 and described drive shaft
2 rotate together.Described second blade 323 is the arc shaped blade to the bending of described hub structure 322.Every one second blade 323 includes
In stepped three wings part 3231 and the 4th alar part 3232.Described four alar parts 3232 are from described three wings part 3231
Extend towards the direction away from described second wheel disc 321 and formed, and its radial thickness is less than the radial direction of described three wings part 3231
Thickness.The cascaded surface that described three wings part 3231 is formed with the 4th alar part 3232 is located at meeting water of described second blade 323
Face.Described second blade 323 can be integrally formed with described second wheel disc 321 it is also possible to be welded admittedly with described second wheel disc 321
Fixed.
Multiple first blades 313 of described first impeller 31 are with multiple second blades 323 of described second impeller 32 one by one
It is correspondingly arranged, the first alar part 3131 of wherein said first blade 313 and the 4th alar part 3232 of described second blade 323
Corresponding, the second alar part 3132 of described first blade 313 is relative with the three wings part 3231 of described second blade 323
Should.
After installation, described first impeller 31 and described second impeller 32 engagement sleeves are located at described raised circle 21 both sides and by institute
State raised circle 21 to house in the inner.More specifically, the of the first hole position of described first impeller 31 and described second impeller 32
One hole position is tightly coordinated with described drive shaft 2, the internal face of the second hole position of described first impeller 31 and described second impeller 32
The internal face of the second hole position abut against with the end of described raised circle 21 respectively.Internal face due to described second hole position is oblique
Face, therefore described first impeller 31 and the second impeller 32 are that local abuts with the end of described raised circle 21, with described raised circle
21 formation cavitys 34.Described first blade 313 and the second blade 323 be located in described first wheel disc 311 and the second wheel disc 321 it
Between, the two is meshed, the second alar part 3132 of wherein said first blade 313 and the flap portion of described second blade 323
Points 3231 and the cascaded surface that formed of the 4th alar part 3232 abut against, the 4th alar part 3232 of described second blade 323 and institute
The cascaded surface of the first alar part 3131 and the second alar part 3132 formation of stating the first blade 313 abuts against.
In radial directions, described first impeller 31 and the second impeller 32 pass through described hub structure 312,322 and institute respectively
State drive shaft 2 fixing, and in the axial direction, described first impeller 31 and the second impeller 32 can be along the axial directions of described drive shaft 2
Direction is moved within the specific limits.
Described spacing interstage sleeve 4 is in substantially hollow cylindrical structure.Described two spacing interstage sleeve 4 fixed covers are located at described drive shaft
On 2, and the symmetrical interval setting of relatively described impeller 3.Described spacing interstage sleeve 4 with described impeller 3 mutually across a certain distance, which defines
Described first impeller 31 and the axial movement distance of the second impeller 32.
Described fixed cover 5 is in equally hollow cylindrical structure, and it is set on described spacing interstage sleeve 4, for by described limit
Position interstage sleeve 4 is fixing with described drive shaft 2.
Described two elastic components 6 be respectively symmetrically be arranged between described first impeller 31 and described spacing interstage sleeve 4 and described
Between second impeller 32 and described spacing interstage sleeve 4.Described elastic component 6 can be the hollow circular cylinder being processed by elastomeric material
Or conical ring plate or a compression spring.In the range of elastic deformation, described elastic component 6 is subject to compressing of described impeller 3
Corresponding after effect produce compressive deformation, so that the spacing between described first impeller 31 and the second impeller 32 increases, when compressing
After power disappears, described elastic component 6 recovers deformation and reacts on described impeller 3 so that described first impeller 31 and the second impeller
Spacing between 32 reduces.
Described modular pressure is used for driving described first impeller 31 synchronous anti-along described drive shaft 2 with described second impeller 32
To mobile to adjust the spacing between two impellers.Specifically, described modular pressure includes described drive shaft 2 and axially sets in direction
The hydraulic tube 22 put and the delivery hole 23 in the setting of its radial direction.Described hydraulic tube 22 is blind pipe, and it is from described drive shaft 2 one
The end face at end extends to the inside of described drive shaft 2, and terminates inside described drive shaft 2.The openend of described hydraulic tube 22
Can connect with the oil pipe (not shown) of described motor.Described delivery hole 23 connects described hydraulic tube 22 and described cavity
34.
Again please refer to Fig. 4 and Fig. 5, represent tunable pump 100 work that impeller outlet adjusting means widened by described band respectively
Two kinds when making different output flows and pressure, wherein Fig. 4 is that elastic component shown in Fig. 1 does not produce broken section during elastic deformation
Scheme, now the output flow of tunable pump 100 and the pressure minimum of impeller outlet adjusting means widened by described band, and Fig. 5 is shown in Fig. 1
Elastic component produces partial sectional view during maximum flexibility deformation, and now the tunable pump of impeller outlet adjusting means widened by described band
100 output flow and pressure are maximum.Tunable pump 100 output flow of impeller outlet adjusting means widened by described band and pressure is adjusted
Section operation principle be：Pour into hydraulic oil inside the openend of described hydraulic tube 22 is to it, with oil in described hydraulic tube 22
That measures gradually increases, and hydraulic oil can slowly overflow in described cavity 34 from described delivery hole 23 and be full of described cavity 34, makes
Pressure in described cavity 34 is gradually increased, under the pressure of hydraulic oil acts on, described first impeller 31 and 32 points of the second impeller
Do not move in the opposite direction and compress and act on described elastic component 6, described elastic component 6 corresponds to generation after being compressed effect and presses
So that the spacing between described first impeller 31 and the second impeller 32 is gradually increased, then the whole width of described impeller 3 increases for contracting deformation
Plus, that is, the effective active area of described impeller 3 increases, so that the tunable pump 100 of impeller outlet adjusting means widened by described band
Output flow and pressure increase, therefore, only need to adjust the oil mass of hydraulic oil or the pressure of hydraulic oil in described hydraulic tube 22
Just can realize described band is widened tunable pump 100 output flow of impeller outlet adjusting means and the control of pressure.Described sky
The oil mass of the hydraulic oil in chamber 34 is more, or the pressure of hydraulic oil is bigger, and the compressive deformation of described elastic component 6 is bigger.If
Need to reduce the output flow of tunable pump 100 and the pressure that impeller outlet adjusting means widened by described band, then reduce described hydraulic pressure
The pressure of the oil mass of hydraulic oil or hydraulic oil in pipe 22, described elastic component 6 recovers compressive deformation or compressive deformation diminishes, from
And the spacing between described first impeller 31 and the second impeller 32 reduces, so described band widen impeller outlet adjusting means can
The output flow of pump 100 and pressure is adjusted to reduce.
Compared to prior art, the band that the present invention provides widens the tunable pump of impeller outlet adjusting means by entering to impeller
Row improves, and impeller is arranged to intermeshing first impeller and the second impeller, and is provided with described first impeller of driving and/or institute
State the second impeller along described drive shaft axial direction movement to adjust the modular pressure of the spacing between two impellers, thus adjusting whole
The width of individual impeller, to realize the control to output flow and pressure, overcomes and fails by adjusting impeller width all the time
To change the output flow of pump and the defect of pressure.And structure is simple, easy for operation, can in its running at any time
Adjust output flow and pressure, and do not affect the efficiency of pump.
Certainly as the improvement further of above-mentioned embodiment, the openend of described hydraulic tube 22 can also be with other devices
Connect, the liquid pouring into toward in described hydraulic tube 22 is not limited solely to hydraulic oil or other band press liquid or gas
Body.Additionally, in order to prevent the hydraulic oil in described cavity 34 from overflowing in the gap between described impeller 3 and described drive shaft 2,
Described first impeller 31 and the second impeller 32 can also arrange sealing with the contact site of described drive shaft 2 at adjacent end
Ring.
The foregoing is only embodiments of the invention, not thereby limit the present invention the scope of the claims, every using this
Equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in the skills of other correlations
Art field, is included within the scope of the present invention.
Claims (9)
1. a kind of band widens the tunable pump of impeller outlet adjusting means it is characterised in that including drive shaft, being sheathed on described driving
The impeller of axle, two elastic components and modular pressure, described impeller includes intermeshing first impeller and the second impeller, described two bullets
Property part be respectively symmetrically and be arranged at described impeller both sides, described modular pressure drives described first impeller and/or described second impeller
Along described drive shaft axial direction movement to adjust the spacing between two impellers.
2. band according to claim 1 widens the tunable pump of impeller outlet adjusting means it is characterised in that described pressure mould
Block drive described first impeller and described second impeller along described drive shaft synchronous backward movement to adjust between two impellers between
Away from.
3. band according to claim 2 widens the tunable pump of impeller outlet adjusting means it is characterised in that described drive shaft
Outside wall surface be provided with a raised circle, described first impeller and the second impeller are respectively cooperating with being arranged at described raised circle both sides and coordinating
Form cavity, described modular pressure includes hydraulic tube and delivery hole, described delivery hole connects described hydraulic tube and described cavity.
4. band according to claim 3 widens the tunable pump of impeller outlet adjusting means it is characterised in that described band is widened
The tunable pump of impeller outlet adjusting means also includes two spacing interstage sleeves, described two spacing interstage sleeve fixed covers located at described drive shaft and
The symmetrical interval setting of relatively described impeller, described elastic component elastic clip is between described impeller and described spacing interstage sleeve.
5. band according to claim 1 widens the tunable pump of impeller outlet adjusting means it is characterised in that described first leaf
Wheel includes the first wheel disc and array distribution in multiple first blades on described first wheel disc side surface, and every one first blade includes
In stepped first alar part and the second alar part；Described second impeller includes the second wheel disc and array distribution in described second
Multiple second blades of wheel disc one side surface, every one second blade includes in stepped three wings part and the 4th alar part,
The plurality of first blade with the plurality of second blade correspond setting, the first alar part of wherein said first blade with
4th alar part of described second blade is corresponding, the three wings of the second alar part of described first blade and described second blade
Partly corresponding.
6. band according to claim 5 widens the tunable pump of impeller outlet adjusting means it is characterised in that described first leaf
Piece and described second blade are arc shaped blade, and the cascaded surface that described first alar part and the second alar part are formed is located at described the
The back side of one blade, the cascaded surface that described three wings part is formed with the 4th alar part is located at meeting water of described second blade
Face.
7. band according to claim 6 widens the tunable pump of impeller outlet adjusting means it is characterised in that described second wing
Part extends towards the direction away from described first wheel disc from described first alar part and is formed, and its radial thickness is less than described first
The radial thickness of alar part, described 4th alar part extends shape from described three wings part towards the direction away from described second wheel disc
Become, and its radial thickness is less than the radial thickness of described three wings part.
8. band according to claim 1 widens the tunable pump of impeller outlet adjusting means it is characterised in that described band is widened
The tunable pump of impeller outlet adjusting means also includes pump case, and described drive shaft runs through described pump case, described pump case include the pump housing and
Pump cover, the described pump housing is provided with fluid intake and fluid issuing, and the described pump housing and the cooperation of described pump cover limit the described impeller of collecting
Cavity, described impeller is housed in described cavity, and according to direction initialization rotation, to drive fluid to flow to stream from fluid intake
Body exports.
9. band according to claim 3 widens the tunable pump of impeller outlet adjusting means it is characterised in that described hydraulic tube
For blind pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410544878.1A CN104806561B (en) | 2014-10-15 | 2014-10-15 | Adjustable pump with adjusting device for widening impeller outlet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410544878.1A CN104806561B (en) | 2014-10-15 | 2014-10-15 | Adjustable pump with adjusting device for widening impeller outlet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104806561A CN104806561A (en) | 2015-07-29 |
| CN104806561B true CN104806561B (en) | 2017-02-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410544878.1A Active CN104806561B (en) | 2014-10-15 | 2014-10-15 | Adjustable pump with adjusting device for widening impeller outlet |
Country Status (1)
| Country | Link |
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| CN (1) | CN104806561B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITUB20153440A1 (en) * | 2015-09-07 | 2017-03-07 | Annovi Reverberi Spa | GROUP OF KINEMATIC COUPLING |
| CN106555768B (en) * | 2016-11-07 | 2019-07-02 | 长沙山水节能研究院有限公司 | Online adjustable centrifugal pump and its on-line control method |
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| EP1743101B1 (en) * | 2004-04-26 | 2009-07-08 | Ebara Corporation | Centrifugal pump and method of manufacturing the same |
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| EP1904747B1 (en) * | 2005-07-19 | 2011-10-05 | Davey Water Products Pty Ltd | Improved impeller arrangement and pump |
| CN202073830U (en) * | 2011-04-29 | 2011-12-14 | 友森精机股份有限公司 | Pumping impeller |
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| CN203374510U (en) * | 2013-07-13 | 2014-01-01 | 长沙天康泵业科技有限公司 | Staggered, symmetrical and energy-saving type dual-suction pump impeller |
| CN203500105U (en) * | 2013-09-09 | 2014-03-26 | 长沙三昌泵业有限公司 | Double suction middle-opening centrifugal pump with partial-open type or semi-open type impeller |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5728589B2 (en) * | 2011-10-17 | 2015-06-03 | 本田技研工業株式会社 | Impeller manufacturing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE688886C (en) * | 1937-09-10 | 1940-03-05 | Siemens Schuckertwerke Akt Ges | Impeller for water ring pumps for pumping air or gases |
| EP1743101B1 (en) * | 2004-04-26 | 2009-07-08 | Ebara Corporation | Centrifugal pump and method of manufacturing the same |
| EP1904747B1 (en) * | 2005-07-19 | 2011-10-05 | Davey Water Products Pty Ltd | Improved impeller arrangement and pump |
| CN101326372A (en) * | 2005-12-21 | 2008-12-17 | 格伦德福斯管理联合股份公司 | Impeller of a pump unit and corresponding pump unit |
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| CN102478019A (en) * | 2010-11-25 | 2012-05-30 | 山东双轮股份有限公司 | Thread anti-loosening structure for impellers of centrifugal pump |
| CN202073830U (en) * | 2011-04-29 | 2011-12-14 | 友森精机股份有限公司 | Pumping impeller |
| CN203374510U (en) * | 2013-07-13 | 2014-01-01 | 长沙天康泵业科技有限公司 | Staggered, symmetrical and energy-saving type dual-suction pump impeller |
| CN203500105U (en) * | 2013-09-09 | 2014-03-26 | 长沙三昌泵业有限公司 | Double suction middle-opening centrifugal pump with partial-open type or semi-open type impeller |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104806561A (en) | 2015-07-29 |
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