CN109964043A - Helical runner - Google Patents

Helical runner Download PDF

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Publication number
CN109964043A
CN109964043A CN201880004177.5A CN201880004177A CN109964043A CN 109964043 A CN109964043 A CN 109964043A CN 201880004177 A CN201880004177 A CN 201880004177A CN 109964043 A CN109964043 A CN 109964043A
Authority
CN
China
Prior art keywords
blade
hub
inward flange
impeller
edge
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
Application number
CN201880004177.5A
Other languages
Chinese (zh)
Inventor
马努维尔·贾瓦哈·伊格纳齐
卡利穆图·佩利亚杜莱
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shiae Pump Private Co Ltd
Original Assignee
Shiae Pump Private Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shiae Pump Private Co Ltd filed Critical Shiae Pump Private Co Ltd
Publication of CN109964043A publication Critical patent/CN109964043A/en
Pending legal-status Critical Current

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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
    • F04D7/04—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
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2238—Special flow patterns
    • F04D29/225—Channel wheels, e.g. one blade or one flow channel
    • 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
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/24—Vanes
    • F04D29/242—Geometry, shape
    • F04D29/245—Geometry, shape for special effects
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00—Components
    • F05D2240/20—Rotors
    • F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F05D2240/303—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor related to the leading edge of a rotor blade
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2250/00—Geometry
    • F05D2250/70—Shape
    • F05D2250/71—Shape curved
    • F05D2250/712—Shape curved concave

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

Provide a kind of impeller comprising the blade of the helically configuration on hub is set.Hub has top and base portion.The top on top is arranged in the first end of blade and the second end of blade is arranged on base portion.The surface of blade has convex.Blade includes inward flange.The first part between top and base portion of inward flange is attached to hub, and the second part of inward flange extends in top end.Outer edge is arranged on the contrary with inward flange.Inward flange is connected by leading edge at first end with outer edge.Inward flange curves inwardly in edge.Inward flange is connected by rear at second end with outer edge.

Description

Helical runner
Technical field
This theme relates generally to impeller, and more particularly to the impeller with helical configuration.
Background technique
In general, the centrifugal pump with helical runner is for conveying the fluid containing solid, such as sewage.These solids can be with Including debirs, long fibre etc..The solid particle being present in these fluids tends to accumulate in edge and the encirclement of impeller Between the shell of impeller.This accumulation can reach the degree that impeller can be hindered to rotate.Moreover, the long fibre in this fluid Tend to for themselves being wrapped in around impeller blade.Therefore, the pump for conveying this fluid has by consolidating in fluid Body particle or clogged with deposits or the trend of blocking.This leads to the physical fault of pump.In addition, certain abrasivenesses of such as sand are solid The delay of body can cause to wear, which reduces the efficiency of pump.
Detailed description of the invention
It is described in detail with reference to attached drawing.The leftmost number of appended drawing reference, which identifies, in the figure first appears this The figure of appended drawing reference.Through attached drawing, identical feature and component are marked using identical number.
Fig. 1 (a) depicts the isometric view of the impeller of the embodiment according to this theme.
Fig. 1 (b) depicts another isometric view of the impeller of the embodiment according to this theme.
Fig. 2 (a) depicts the top view of the impeller of the embodiment according to this theme.
Fig. 2 (b) depicts the progressive of the inlet angle of the edge of the embodiment according to this theme.
Fig. 3 (a) depicts the side view of the pump of the embodiment according to this theme, which includes the intracorporal impeller of shell.
Fig. 3 (b) depicts the bent section of the embodiment according to this theme.
Fig. 4 depicts the plan view of the shell including helical runner of the embodiment according to this theme.
Specific embodiment
This theme provides a kind of impeller for centrifugal pump, which includes solid and quasi-solid stream for pumping Body.
Centrifugal pump has been used for pumping viscous fluid, such as sewage waste.These viscous fluids include quasi- solid and solid, Such as debirs, long fibre solid, abrasiveness solid etc..The centrifugal pump for being commonly used for this operation, which has, to be arranged in shell Interior helical runner.The edge of helical runner is mounted on the rotor, so that edge reduces blocking close to shell.However, solid Particle, especially quasi- solid particle, it is intended to which accumulation is formed in the gap between edge and shell wall.This is further prevented The rotation of impeller, to prevent the work of centrifugal pump.Moreover, the abrasiveness solid of such as glass and sand tend to cause from The abrasion of the component of heart pump.Although being cleaned to remove any accumulation, this is also reduction of the efficiency of pump.
In addition, the problem of centrifugal pump for pumping viscous fluid is also tended to cavitation.Cavitation be Bubble or hole are formed in pumped fluid.Develop in the region of relatively low pressure of the cavitation usually around impeller.This The implosion of a little bubbles or collapsing can generate strong shock wave in pump, to cause to impeller and pump case badly damaged.
This theme provides a kind of impeller, facilitates a possibility that reducing accumulation, to reduce blocking and cavitation. Impeller includes hub and blade.Hub includes top and base portion.Blade is arranged on hub with helical configuration.The first end setting of blade exists The second end of the top end of hub, blade is arranged on the base portion of hub.The surface of blade has convex.
Blade includes inward flange.The first part between the top of hub and the base portion of hub of inward flange is attached to hub, and And the second part of inward flange extends in the top end of hub.The outer edge of blade is opposite with inward flange.The leading edge of blade is in leaf Inward flange is connected with outer edge at piece first end.Inward flange curves inwardly in edge.The rear of blade is in blade second Inward flange is connected with outer edge at end.
Blade has inlet angle and the angle of outlet.Inlet angle is variation from up-front slightly end to hub, and the angle of outlet is from rear The slightly end of edge is to change to hub.Up-front slightly end is construed as the outer peripheral endpoint at the first end of blade, then The slightly end of edge is construed as the outer peripheral endpoint at the second end of blade.Pass through the shape between the leading edge and rear of blade At circle the flowing of fluid is converted into radial output from axial input.
This theme additionally provides a kind of centrifugal pump comprising places impeller in the housing.Shell may include suction inlet. Centrifugal pump can be used for pumping the fluid with solid material, such as sewage.
The convex of blade surface provides 3-d modelling for helical blade.Convex --- hereinafter also referred to as three-dimensional Configuration --- cause when rotated, the solid impurity, especially quasi- solid particle in fluid are in axial direction mobile towards hub.This Outside, 3-d modelling allows streamline flow of the fluid from suction inlet to outlet.The streamline flow of fluid reduces particle product Poly- trend, and reduce the friction as caused by abrasiveness solid particle.In addition, 3-d modelling and suction inlet together reduce leaf The formation of on piece vapor chamber, thus the trend for reducing hole formation and the damage as caused by cavitation.
By combining the following description and drawings, the above and other features, aspects and advantages of theme will be better explained.It answers When and should not being solved it is noted that description and attached drawing illustrate only the principle and example described herein of this theme It is interpreted as the limitation to this theme.It should therefore be understood that various arrangements can be designed, although be not explicitly described herein or It shows, but embodies the principle of the disclosure.In addition, narration herein its principle, aspect and exemplary all statements are intended to Cover its equivalent.In addition, for simplicity, and without restriction, it is marked in all the appended drawings using identical number Remember identical feature and component.
Fig. 1 (a) depicts the impeller 100 according to the embodiment of this theme --- hereinafter also referred to as helical runner 100 --- isometric view.Helical runner 100 includes blade 102 and hub 104.In this example, hub 104 is taper hub.Hub 104 Including top 104a and base portion 104b.In this example, top 104a is the vertex of taper hub, and base portion 104b includes taper hub Conical surface.
Blade 102 is dispersed on hub 104 with helical configuration.The top of hub 104 is arranged in the first end 105a of blade 102 Above 104a.The second end 105b of blade 102 is arranged on the base portion 104b of hub 104.The surface of blade 102 is in blade 102 There is convex in whole length.As will be understood, convex means as spherical or circular outside It is bent outwardly or rounding.Convex causes when rotated, and the solid impurity in fluid is in axial direction mobile towards hub 104. Convex additionally aids the streamline flow of fluid and solid, and This further reduces the trend of particle accumulation, and also subtract The friction as caused by the abrasion particles in fluid is lacked.
Blade 102 includes leading edge 106, rear 108, inward flange 110 and outer edge 112.Inward flange 110 in top 104a First part 114 between base portion 104b is attached to hub 104.The second part 116 of inward flange 110 is on the top of hub 104 Extend above 104a.Outer edge 112 is arranged on the contrary with inward flange 110.Inward flange 110 and outer edge 112 are substantially in blade Extend in 102 whole length.
Inward flange 110 is connected by leading edge 106 at the first end 105a of blade 102 with outer edge 112.Inward flange 110 Bent section 118 is bent inwardly to form at leading edge 106.Bent section 118 is illustrated in greater detail in Fig. 1 (b).Convex Profile terminates at rear 108.Inward flange 110 is connected by rear 108 at second end 105b with outer edge 112.In this example, The width of blade 104 increases from leading edge 106 to rear 108.Various edges are illustrated in detail in Fig. 2.
Fig. 2 (a) depicts the top view of the helical runner 100 according to the embodiment of this theme.Impeller 100 is in leading edge There is angle of outlet β 2 with inlet angle β 1 at 106 and at rear 108.In this example, inlet angle β 1 is from the slightly end of leading edge 106 It is variation to hub, and angle of outlet β 2 is variation from the slightly end of entrance rear 108 to hub 104.Inlet angle β 1 with 11 ° extremely 12 ° progressive changes to 65 ° from 18 °.The slightly end of the progressive inlet angle β 1 meaned at leading edge 106 from hub 104 to leading edge 106 It is variation.Progressive in order to determine, leading edge 106 can be divided into five equal sections from hub 104 to slightly end, wherein each Section has the incremental angular that 11 to 12 degree are differed with previous section with the intersection of leading edge 106.It later will be with reference to Fig. 2 (b) to this It is further described.
Blade 102 is arranged around hub 104, so that the inward flange 110 of blade 102 shape in 114 (not shown) of first part Shape cooperates around hub 104.In this example, angle of outlet β 2 changes to 22 ° from 14 ° with 2 to 3 the progressive of degree.This is progressive to mean Slightly end of the angle of outlet β 2 from hub 104 to rear 108 is variation.As explained for inlet angle β 1, rear 108 can be from hub 104 are divided into five equal sections to slightly end, wherein each section and the intersection of rear 108 have and previous section phase The incremental angular of poor 2 to 3 degree.
Fig. 2 (b) depicts progressive at the leading edge 106 according to the embodiment of this theme.In order to determine from hub 104 to outer The inlet angle β's 1 at edge is progressive, and leading edge 106 is segmented into section 203a, 203b, 203c, 203d, is collectively referred to as section 203.Tangent line 204a, 204b, 204c, the 204d for being collectively referred to as tangent line 204 can be at the leading edges 106 of the junction of each section It draws.As shown in Fig. 2 (b), the angle that is formed between each tangent line 204 and the plane of the rotation axis including impeller 100 with 11 ° to 12 ° of the progressive slightly end variation from hub 104 to leading edge 106.It similarly, can also be in rear although being not shown About 2 ° to 3 ° progressive is seen at 108.
In this example, blade 102 has constant vane thickness between leading edge 106 and rear 108.Constant blade is thick Degree facilitates the power for bearing to be applied on blade 102 and additionally aids the channel volume for keeping high.
In this example, blade 102 is arranged in the spiral shell formed on hub 104 around the more than one of hub 104 and less than two Volution.For example, being equivalent to 360 ° around the complete circle that center hub 104 is formed.Blade 102, which is formed, surrounds the 500 of hub 104 Circle between 540 °.In general, there is complete spiral coil, such as one or more circles, cause around blade 102 and hub 104 Long fibre wind increase.The long solid particle that the screw arrangement of this blade 102 reduces such as fiber is wrapped in blade 102 The chance of surrounding.In one example, helical blade 102 forms a half-turn for surrounding hub 104.Leaf on hub 104 is set Piece 102 forms impeller.Then impeller 100 is put into shell to form pump, as shown in Fig. 3 (a).
Fig. 3 (a) depicts the side view of the pump 300 according to the embodiment of this theme.Pump 300 includes shell 302 and sets Set the impeller 100 in shell 302.Fig. 3 (a) depicts the impeller 100 with the shell 302 being partly broken off.In this example, Shell 302 is frustum of a cone.Shell 302 may include suction inlet 304.Suction inlet 304 leads to inlet chamber 306.Shell 302 is also It may include discharge chamber 308.Impeller 100 is placed in shell 302, so that leading edge 106 is substantially more leaned on than discharge chamber 308 Nearly suction inlet 304.
Impeller 100 is placed in shell 302, so that leading edge 106 forms semi-open structure.Semi-open structure allows biggish Solid particle is mobile without being stuck between leading edge 106 and shell 302 towards hub 104.As previously mentioned, bent section 118 is also Help cause solid particle mobile towards hub 104.Bent section 118 is shown specifically in Fig. 3 (b).Suction inlet 304 and bending section Section 118 facilitates to prevent from forming vapor chamber together.Therefore, the current configuration of the helical runner 100 in shell 302 decrease by The chance of the damage caused by cavitation.
Impeller 100 is arranged in shell 302, so that outer edge 112 forms the very thin gap with the wall of shell 302. The minimum in the gap between outer edge 112 and the wall of shell 302 reduces the accumulation of the solid particle in gap.Then, it wraps The shell 302 for including impeller 100 is attached to motor for pumping.It includes leaf that Fig. 4, which is depicted according to the embodiment of this theme, The plan view of the shell 302 of wheel 100, shows fluid stream and is pumped through shell 302.
In operation, fluid to be pumped is by by 304 suction casing 302 of suction inlet.Then fluid flows through shell 302 Inlet chamber 306.Rotation of the impeller 100 in shell 302 causes the movement of fluid to become radial side from axial direction movement To movement.Then, fluid is discharged by discharge chamber 308.Can by processing discharge chamber 308 outlet and blade 102 come Change the output characteristics of impeller 100.
It will illustrate this theme by Working Examples now, these Working Examples are intended to illustrate disclosed work, rather than It is intended to restrictively use these Working Examples to carry out any restrictions to the scope of the present disclosure.Unless otherwise defined, otherwise originally All technical and scientific terms that text uses, which have, is generally understood identical contain with disclosure those of ordinary skill in the art Justice.It should be understood that the present disclosure is not limited to described ad hoc approach and experiment conditions, because these method and conditions can be with Changed according to used program and input, as the skilled person will readily understand like that.
Example
Example 1: computational fluid dynamics (CFD) analysis
Primary Calculation fluid dynamics (CFD) is carried out using the pump for including impeller 100 and shell 302 to analyze.CFD analysis The results are shown in Table 1.
Table 1:CFD analysis
From table 1 it follows that 220m may be implemented by using the helical runner 100 of this theme3The flow of/hr, In, the hydraulic efficiency of impeller is 86.62%.In addition, as previously mentioned, the single blade impeller 100 of this theme reduces blocking up in pump Plug.This is realized by the channel volume for the outlet that can be used in making fluid to flow to impeller 100 with streamlined way.It is streamlined The 3-d modelling of the blade 102 around hub 104 is flowed through to realize.Further, since leading edge 106 and rear 108 are to hub 104 It tilts, the solid particle in fluid does not need to advance to the whole length of blade 102.This inclination causes solid particle towards hub 104 is mobile, to reduce the distance of the traveling of solid particle.In addition, which increase fluid is transferred to turning for outlet Number.The single blade of this theme designs and impeller 100 is arranged in shell 302 in a manner of with very small gap or and shell The gap of body 302 prevents the blocking, reflux and cavitation of solid or fibrous material.
Although having been made with reference to certain examples and embodiments thereof has carried out description in considerable detail to this theme, His embodiment is also possible.Therefore, the range of this theme should not necessarily be limited by the description and implementation wherein included of preferable example Mode.

Claims (7)

1. a kind of impeller (100), comprising:
Hub (104), the hub (104) includes top and base portion；And
Blade (102), the blade (102) are arranged on the hub (104) with helical configuration, so that the blade (102) First end is arranged in the top on the top of the hub (104) and the second end setting of the blade (102) is in the hub (104) on the base portion, wherein the surface of the blade (102) has convex, and the blade includes:
Inward flange (110), wherein first part's attachment between the top and the base portion of the inward flange (110) The extremely hub, and wherein, the top on the top of the second part of the inward flange (110) in the hub extends；
Outer edge (112), the outer edge (112) are opposite with the inward flange；
Leading edge (106), the leading edge (106) will be the inward flange (110) and described outer at the first end of the blade Edge (112) is connected, wherein the inward flange (110) curves inwardly at the leading edge (106)；And
Rear (108), the rear (108) will be the inward flange (110) and described outer at the second end of the blade Edge (112) is connected.
2. impeller (100) according to claim 1, wherein the hub (104) is taper hub.
3. impeller (100) according to claim 1, wherein the blade (102) have at the leading edge (106) into Bicker and at the rear (108) have the angle of outlet.
4. impeller (100) according to claim 3, wherein the inlet angle with 11 degree to 12 degree it is progressive from 18 degree become Change to 65 degree.
5. impeller (100) according to claim 3, wherein the angle of outlet with 2 degree to 3 degree it is progressive from 14 degree change To 22 degree.
6. impeller (100) according to claim 1, wherein the blade (102) is in the range of 500 degree to 540 degree Angle around the hub extend.
7. a kind of centrifugal pump (300), comprising:
Shell (302)；
Impeller (100), the impeller (100) are arranged on the shell (302), and the impeller (100) includes:
Hub (104), the hub (104) includes top and base portion；And
Blade (102), the blade (102) are arranged on the hub (104) with helical configuration, so that the blade (102) First end is arranged in the top on the top of the hub (104) and the second end setting of the blade (102) is in the hub (104) on the base portion, wherein the surface of the blade (102) has convex, and the blade includes:
Inward flange (110), wherein first part's attachment between the top and the base portion of the inward flange (110) The extremely hub, and wherein, the top on the top of the second part of the inward flange (110) in the hub extends；
Outer edge (112), the outer edge (112) are opposite with the inward flange；
Leading edge (106), the leading edge (106) will be the inward flange (110) and described outer at the first end of the blade Edge (112) is connected, wherein the inward flange (110) curves inwardly at the leading edge (106)；And
Rear (108), the rear (108) will be the inward flange (110) and described outer at the second end of the blade Edge (112) is connected.
CN201880004177.5A 2017-06-22 2018-06-22 Helical runner Pending CN109964043A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IN201741022007 2017-06-22
IN201741022007 2017-06-22
PCT/IN2018/050411 WO2018235105A1 (en) 2017-06-22 2018-06-22 Helical impeller

Publications (1)

Publication Number Publication Date
CN109964043A true CN109964043A (en) 2019-07-02

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ID=64736912

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Application Number Title Priority Date Filing Date
CN201880004177.5A Pending CN109964043A (en) 2017-06-22 2018-06-22 Helical runner

Country Status (4)

Country Link
EP (1) EP3642490A4 (en)
CN (1) CN109964043A (en)
WO (1) WO2018235105A1 (en)
ZA (1) ZA201902263B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111706553A (en) * 2020-06-23 2020-09-25 西安航空学院 Fastening nut capable of preventing entrance low-pressure cavitation

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3156190A (en) * 1963-03-14 1964-11-10 Hidrostal Pump impeller
EP0011506A1 (en) * 1978-11-17 1980-05-28 Spp Group Limited Single vane rotodynamic impeller
DE3029915A1 (en) * 1979-09-27 1981-04-16 Emu Unterwasserpumpen Gmbh, 8670 Hof SCREW PUMP
US20100215504A1 (en) * 2007-08-16 2010-08-26 Frideco Ag Pump rotor and pump comprising a pump rotor of said type
US20100284812A1 (en) * 2009-05-08 2010-11-11 Gm Global Technology Operations, Inc. Centrifugal Fluid Pump

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57181997A (en) * 1981-04-30 1982-11-09 Ebara Corp Single-blade impeller pump
CN203081851U (en) * 2013-01-28 2013-07-24 青岛佳洲泵业有限公司 Novel balance-adjustable spiral centrifugal impeller

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3156190A (en) * 1963-03-14 1964-11-10 Hidrostal Pump impeller
EP0011506A1 (en) * 1978-11-17 1980-05-28 Spp Group Limited Single vane rotodynamic impeller
DE3029915A1 (en) * 1979-09-27 1981-04-16 Emu Unterwasserpumpen Gmbh, 8670 Hof SCREW PUMP
US20100215504A1 (en) * 2007-08-16 2010-08-26 Frideco Ag Pump rotor and pump comprising a pump rotor of said type
US20100284812A1 (en) * 2009-05-08 2010-11-11 Gm Global Technology Operations, Inc. Centrifugal Fluid Pump

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111706553A (en) * 2020-06-23 2020-09-25 西安航空学院 Fastening nut capable of preventing entrance low-pressure cavitation

Also Published As

Publication number Publication date
EP3642490A1 (en) 2020-04-29
ZA201902263B (en) 2020-08-26
WO2018235105A1 (en) 2018-12-27
EP3642490A4 (en) 2021-03-17

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Application publication date: 20190702