WO2015099526A1 - Carter pour pompe, et pompe dotée d'un carter - Google Patents

Carter pour pompe, et pompe dotée d'un carter Download PDF

Info

Publication number
WO2015099526A1
WO2015099526A1 PCT/NL2014/050894 NL2014050894W WO2015099526A1 WO 2015099526 A1 WO2015099526 A1 WO 2015099526A1 NL 2014050894 W NL2014050894 W NL 2014050894W WO 2015099526 A1 WO2015099526 A1 WO 2015099526A1
Authority
WO
WIPO (PCT)
Prior art keywords
casing
pump
impeller
edge
inward extending
Prior art date
Application number
PCT/NL2014/050894
Other languages
English (en)
Inventor
Lars Adriaan KRAKERS
Original Assignee
Flowserve B.V.
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 Flowserve B.V. filed Critical Flowserve B.V.
Publication of WO2015099526A1 publication Critical patent/WO2015099526A1/fr

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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/528—Casings; Connections of working fluid for axial pumps especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/16—Sealings between pressure and suction sides
    • F04D29/165—Sealings between pressure and suction sides especially adapted for liquid pumps
    • F04D29/168—Sealings between pressure and suction sides especially adapted for liquid pumps of an axial flow wheel
    • 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
    • F04D29/181—Axial flow rotors
    • 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
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/548—Specially adapted for liquid pumps

Definitions

  • the invention relates to a casing for a pump, which casing comprises an inlet opening and an outlet opening and which casing is configured to accommodate an impeller.
  • the casing is particularly intended and/or configured for a pumping engine pump.
  • the invention also relates to a pump for pumping water, comprising a casing with an inlet opening and an outlet opening and an impeller disposed in the casing.
  • the pump according to the invention is particularly a pumping engine pump.
  • Such casings and pumps provided with such a casing are known.
  • the pumps are used to carry water upward.
  • a pump for carrying water upward is also referred to as a pumping engine pump.
  • a pumping engine pump During the upward movement of water fish present in the water can be entrained
  • the fish can swim against the impeller of the pump, and this impeller can have a relatively sharp tip on its foremost end zone as seen in a direction of rotation of the impeller. This tip extends close to the inner peripheral surface of the casing.
  • the fish swim against the tip of the impeller they may be injured or even die. This problem occurs particularly in the case of eels, since eels are a fish species which tends to swim along walls, i.e. in the vicinity of the inner peripheral surface of the casing, and therefore in the vicinity of the tip.
  • the casing according to the invention is for this purpose characterized in that the casing is provided at its inlet opening with an inward extending edge.
  • the inward extending edge of the casing shields the sharp tip of the impeller, whereby the fish do not swim against it, or there is at least less chance of them doing so. Fish mortality and/or injury to fish can hereby be reduced.
  • the one axial end of the casing preferably defines the inlet opening.
  • the casing is the peripheral wall of the inlet opening.
  • the other opposite axial end of the casing preferably defines the outlet opening.
  • the casing is the peripheral wall of the outlet opening. This provides a relatively large inlet and/or outlet opening for upward displacement of water.
  • the inward extending edge preferably extends along the whole length of the inlet opening.
  • the inward extending edge preferably extends along the whole peripheral length of the inlet opening and preferably along the whole peripheral length of the casing.
  • the sharp tip of the impeller can be situated anywhere over the whole periphery of the inlet opening. It is therefore advantageous for the inward extending edge to extend along the whole peripheral length of the inlet opening.
  • the inward extending edge can take a continuous form as well as having a number of interruptions, wherein the interruptions have a dimension such that this is smaller than a fish to be entrained.
  • the inward extending edge preferably has a width which is at least equal to a dimension of a gap between the impeller and the inner peripheral surface of the casing.
  • the width is preferably at least slightly larger than the dimension of the gap.
  • the tip of the impeller is hereby properly shielded.
  • the gap has a dimension which, also depending on the diameter of an impeller disposed in the casing, lies between 0.2 mm and 5 mm.
  • the inward extending edge hereby has a dimension which likewise lies between 0.2 mm and 5 mm or slightly larger, for instance between 0.2 mm and 6 mm.
  • the casing can have a greater width so that the casing is also suitable for an impeller with standing edge, as will be further elucidated hereinbelow.
  • the inward extending edge has in that case a width of between 1 mm and 5 cm, preferably between 5 mm and 2 cm. more preferably about 1 cm.
  • the inward extending edge can for instance have a substantially constant dimension over the periphery of the inlet opening.
  • the angle between the inner peripheral surface of the casing and the inward extending edge can be selected as desired such that the tip of the impeller is properly shielded and there is a reduced chance of the fish swimming against it.
  • the angle can for instance lie between 45° and 150°, more particularly between 60° and 120°, is still more particularly about 90°.
  • a part of the water carried upward can leak away via the gap. Owing to the suction force of the leaking water a fish entrained with the water can be drawn into the gap, and the fish can hereby be injured or may even die.
  • This problem occurs particularly in the case of eels, since as described above eels tend to swim along walls, i .e. in the vicinity of the gap.
  • the blade on the pressure side thereof With a standing edge on its outer peripheral edge zone the fish will swim against the standing edge and will thereby not be drawn into the gap, or there is at least a reduced chance thereof, whereby injur ⁇ ' to and/or death of fish can be prevented or at least reduced still further with the pump according to the invention.
  • the leakage flow can be reduced by the standing edge, whereby the suction force of the leakage flow can decrease. This further reduces the chance of a fish being entrained in the leakage flow.
  • the standing edge preferably has a height selected in accordance with a fish to be entrained during use and/or a maximum allowable loss of efficiency.
  • the height can for instance be adapted to an average cross-sectional dimension of an eel, since in view of the scarcity of eels it is particularly wished to prevent injury and death of this fish species.
  • a height which is equal to the average cross-sectional dimension of the eel or other fish, and preferably greater than the average cross-sectional dimension of the eel or other fish By selecting a height which is equal to the average cross-sectional dimension of the eel or other fish, and preferably greater than the average cross-sectional dimension of the eel or other fish, entraining of the eel or other fish in the leakage flow can be prevented or at least reduced.
  • An unnecessarily great height is preferably not therefore selected, but one in accordance with a maximum allowable loss of efficiency.
  • the maximum allowable loss of efficiency, and thereby the height of the edge can be selected as desired.
  • the eventual height of the edge is therefore preferably a trade-off between the cross-sectional dimension of the fish to be entrained during use and a desirable or acceptable loss of efficiency.
  • the standing edge has in practical manner a height of between 2 cm and 25 cm, preferably between 3 cm and 10 cm, more preferably between 4 cm and 6 cm, still more preferably of about 5 cm.
  • a height of 5 cm is suitable for instance for eels, wherein the loss of efficiency can be deemed acceptable.
  • the height can be selected as desired and differ from the above stated values.
  • the height is particularly selected such that the standing edge does not extend as far as an optional subsequent blade or subsequent part of the same blade as seen in axial direction.
  • the height of the standing edge can decrease close to a foremost and/or rearmost end zone of the blade as seen in the direction of rotation of the impeller, wherein it for instance becomes zero.
  • the standing edge has no function, or a reduced one, whereby it is advantageous for the height thereof to decrease in order to keep the friction imparted by the edge as low as possible.
  • the height of the standing edge can decrease gradually or abruptly.
  • the shape in which the height of the standing edge decreases can be selected as desired.
  • the front side of the standing edge can lie flush with as well as extend forward relative to the front edge of the blade.
  • the height of the standing edge is preferably substantially constant along the length of the blade, if desired with the exception of said foremost and/or rearmost end zones of the blade.
  • the standing edge preferably extends substantially parallel to an inner peripheral surface of the casing.
  • the angle between the pressure side surface of the blade and the standing edge is adapted hereto and can therefore vary depending on the assembly of impeller and casing.
  • the angle between the pressure side surface of the blade and the standing edge can for instance lie between 60° and 150°. As seen in cross-section the standing edge can take a straight as well as curved form.
  • the inward extending edge of the casing When the impeller has such a standing edge, it is desirable for the inward extending edge of the casing to have a width which is at least equal to a thickness of the standing edge of the impeller and the dimension of the gap.
  • the tip of the impeller is hereby properly shielded.
  • the standing edge on the blade also has a stiffness/strength-imparting function. This is because the standing edge increases the stiffness and strength of the more or less sickle-shaped tip of the blade, whereby the blade becomes more dimensionally stable.
  • the inward extending edge of the casing has in that case a width of between 1 mm and 5 cm. preferably between 5 mm and 2 cm, more preferably about 1 cm.
  • the width is partly dependent on the diameter of the impeller.
  • the preferred width of about 1 cm applies for an impeller with a diameter of 1 m.
  • the values can however vary per impeller and can be selected as desired.
  • the gap has a radial thickness of between 0.2 mm and 5 mm, depending on the diameter of the impeller, and the standing edge has a thickness of between 2 mm and 4 cm. also depending on the diameter of the impeller.
  • Figure 1 shows schematically a prior art pump
  • Figure 2 shows schematically a pump according to a first embodiment of the invention
  • Figures 3-5 show three different perspectiv e views of the pump according to the first embodiment, wherein figure 3 shows the pump with partially omitted casing, figure 4 shows the pump at an angle from above, and figure 5 shows the pump at an angle from below;
  • Figure 6 shows schematically a pump according to a second embodiment of the invention.
  • Figure 7 shows a perspective view of the pump according to the second embodiment with partially omitted casing.
  • FIG. 1 shows schematically a prior art pump.
  • the pump comprises a casing 1 and an impeller with blade 2.
  • the impeller with blade 2 rotates in direction 3 about a central axis 4, this central axis being the centre line of a hub (not shown).
  • Owing to the pumping action of the pump the water is drawn in via an inlet opening 6 in direction 5.
  • a fish 7 present in the water will swim here in the direction 5 of the indrawn water and can swim here against blade 2 of the impeller.
  • the blade can have a sh rp tip 8 on its foremost end zone as seen in rotation direction 3. When fish 7 swims against the sharp tip 8, fish 7 can thereby be injured or even die.
  • FIG. 2 shows schematically the pump according to the invention, wherein casing 1 is provided at its inlet opening 6 with an inward extending edge 9.
  • Edge 9 has a width b which is slightly larger than the dimension a of a gap 10 between blade 2 and the inner peripheral surface of casing 1 such that edge 9 shields the sharp tip 8 of blade 2. This can effectively prevent, or can at least reduce the chance of fish 7 swimming against sharp tip 8.
  • FIGs 3-5 sho perspective views of the pump of figure 2.
  • the blade 2 with sharp tip 8 mounted on hub 1 1 is clearly shown herein. It can be readily seen in for instance figure 4 that edge 9 extends just beyond the tip 8 of blade 2, whereby tip 8 is shielded thereby.
  • Figure 4 shows casing 1 with impeller from above, or on the side of outlet opening 12 of casing 1.
  • Figure 5 shows casing 1 with impeller from below, or from inlet opening 6 of casing 1 .
  • the impeller comprises two blades 2. It is desirable with a view to fish-friendliness of the pump to provide the fewest possible blades, for instance one or in this case two blades.
  • the impeller can alternatively comprise three, four or more blades, although the fish-friendliness of the pump is thereby reduced.
  • the form of blades 2 is more or less sickle-like, which has been found to be a fish-friendly form.
  • the impeller preferably rotates at a relatively low rotation speed, for instance 200 rpm for an impeller with a diameter of 1 m at a flow rate of 1 m7s and lifting height of 2 m, this further enhancing the fish friendliness.
  • Figure 1 also shows that a leakage flow as indicated with arrows 13 occurs in gap 10.
  • a fish 7 already partially entrained by the impeller can be drawn with the leakage flow into gap 10, which can also injure the fish.
  • figure 6 shows a second embodiment of the pump according to the invention with a blade 2 which is provided on the pressure side and/or suction side thereof with a standing edge 14 on its outer peripheral edge zone.
  • This standing edge 14 can effectively prevent or reduce the chance of the fish being drawn into gap 10.
  • Standing edge 14 has a height h and extends substantially parallel to the inner peripheral surface of casing 1. Although a leakage flow is still present, this leakage flow is smaller than in the pump of figure 1.
  • the width of edge 9 can optionally be larger than in the first embodiment, since the width is now preferably slightly larger than the sum of the dimension a of a gap 10 between blade 2 and the inner peripheral surface of casing 1 and the thickness d of edge 14.
  • the blade with standing edge 14 is further shown clearly in the perspective view of the pump in figure 7. It will be apparent herefrom that, close to the foremost end zone 16 and rearmost end zone 15 of blade 2 in rotation direction 3, the edge 14 gradually decreases to zero.
  • the pump according to the invention can also have a turbine function, whereby the pump is a so-called pump turbine.
  • the pump In turbines the flow through the impeller and the rotation of the impeller will take place in opposite directions.
  • the inward extending edge of the casing will in that case be situated at the outlet opening thereof.
  • the standing edge at the outer peripheral edge zone on the pressure side of the impeller blade(s) is also useful m turbines.
  • the pressure side and suction side of the blade are the same sides for turbine operation as for pump operation, and that the leakage flow is hereby also in the same direction for both turbine operation and for pump operation.

Landscapes

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

Abstract

L'invention se rapporte à un carter destiné à une pompe, ledit carter comprenant une ouverture d'entrée et une ouverture de sortie et ledit carter étant conçu pour loger une roue, le carter étant pourvu, au niveau de son ouverture d'entrée, d'un bord s'étendant vers l'intérieur. L'invention se rapporte également à une pompe destinée à pomper l'eau, comprenant un carter doté d'une ouverture d'entrée et d'une ouverture de sortie et une roue disposée dans le carter, ledit carter étant pourvu, au niveau de son ouverture d'entrée, d'un bord s'étendant vers l'intérieur.
PCT/NL2014/050894 2013-12-24 2014-12-19 Carter pour pompe, et pompe dotée d'un carter WO2015099526A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
NL2012025 2013-12-24
NL2012025 2013-12-24
NL2012504A NL2012504C2 (nl) 2013-12-24 2014-03-25 Mantel voor een pomp en pomp met mantel.
NL2012504 2014-03-25

Publications (1)

Publication Number Publication Date
WO2015099526A1 true WO2015099526A1 (fr) 2015-07-02

Family

ID=52432892

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL2014/050894 WO2015099526A1 (fr) 2013-12-24 2014-12-19 Carter pour pompe, et pompe dotée d'un carter

Country Status (2)

Country Link
NL (1) NL2012504C2 (fr)
WO (1) WO2015099526A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2202790A (en) * 1938-02-23 1940-05-28 Allis Chalmers Mfg Co Waste paper stock pump
US3398694A (en) * 1966-08-11 1968-08-27 Marine Constr & Design Co Submersible pump device for net brailing
GB1201442A (en) * 1968-02-15 1970-08-05 Mixing Equipment Co Inc Liquid pumps having axial flow impellers
US4193737A (en) * 1977-09-22 1980-03-18 Lemmon George H Fish pump
EP1855013A2 (fr) * 2006-05-12 2007-11-14 Appliances Components Companies S.p.A. Amélioration de chambre de pompage dans une pompe à turbine centrifuge

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2202790A (en) * 1938-02-23 1940-05-28 Allis Chalmers Mfg Co Waste paper stock pump
US3398694A (en) * 1966-08-11 1968-08-27 Marine Constr & Design Co Submersible pump device for net brailing
GB1201442A (en) * 1968-02-15 1970-08-05 Mixing Equipment Co Inc Liquid pumps having axial flow impellers
US4193737A (en) * 1977-09-22 1980-03-18 Lemmon George H Fish pump
EP1855013A2 (fr) * 2006-05-12 2007-11-14 Appliances Components Companies S.p.A. Amélioration de chambre de pompage dans une pompe à turbine centrifuge

Also Published As

Publication number Publication date
NL2012504C2 (nl) 2015-06-26

Similar Documents

Publication Publication Date Title
US4193737A (en) Fish pump
EP2295808B2 (fr) turbine ou pompe hydraulique sans danger pour les poissons
CN102465912B (zh) 用于高速离心泵的流动矢量控制
EP2287470A3 (fr) Pompe de drainage
EP3087278B1 (fr) Pompe ou turbine adaptée aux poissons
EP2397697A3 (fr) Pompe et appareil à pompe à chaleur
US20180051718A1 (en) Volute pump
AU2017380455B2 (en) Impeller with rotor blades for centrifugal pump
CA2819779C (fr) Pompe centrifuge et pale de rotor doublement pliee destinee a etre utilisee dans une telle pompe centrifuge
JP5998226B2 (ja) 遠心ポンプ用羽根車及び遠心ポンプ
US9605678B2 (en) Free-flow pump
JP5251587B2 (ja) 遠心圧縮機
WO2015099526A1 (fr) Carter pour pompe, et pompe dotée d'un carter
JP2017150318A (ja) コンプレッサインペラ及びターボチャージャ
KR20150032686A (ko) 원심펌프의 임펠러 흡입 안내장치
JP4576414B2 (ja) コーンおよび水車
CN101737358B (zh) 开槽位置为抛物线的离心压气机非对称自循环处理机匣
JP2005009361A (ja) 遠心流体機械
JPS61145399A (ja) ポンプ
JP2005188397A (ja) 軸流ポンプ
JP5344838B2 (ja) 流体機械
CN114962337A (zh) 一种用于立式离心泵的下沉式进口导叶
RU134255U1 (ru) Шнекоцентробежная ступень насоса
KR20130112477A (ko) 원심펌프

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14831106

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 14831106

Country of ref document: EP

Kind code of ref document: A1