EP1651869A1 - Roue a aubes destinee a des pompes - Google Patents

Roue a aubes destinee a des pompes

Info

Publication number
EP1651869A1
EP1651869A1 EP04738061A EP04738061A EP1651869A1 EP 1651869 A1 EP1651869 A1 EP 1651869A1 EP 04738061 A EP04738061 A EP 04738061A EP 04738061 A EP04738061 A EP 04738061A EP 1651869 A1 EP1651869 A1 EP 1651869A1
Authority
EP
European Patent Office
Prior art keywords
impeller
blades
intermediate wall
sides
suction side
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.)
Granted
Application number
EP04738061A
Other languages
German (de)
English (en)
Other versions
EP1651869B1 (fr
Inventor
Johann Guelich
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.)
Sulzer Pumpen AG
Original Assignee
Sulzer Pumpen AG
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 Sulzer Pumpen AG filed Critical Sulzer Pumpen AG
Priority to EP04738061A priority Critical patent/EP1651869B1/fr
Publication of EP1651869A1 publication Critical patent/EP1651869A1/fr
Application granted granted Critical
Publication of EP1651869B1 publication Critical patent/EP1651869B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2261—Rotors specially for centrifugal pumps with special measures
    • F04D29/2266—Rotors specially for centrifugal pumps with special measures for sealing or thrust balance

Definitions

  • the invention relates to an impeller for pumps, in particular radial pumps, according to the preamble of claim 1, and a pump, in particular radial pumps, with such an impeller, and a method for operating such a pump.
  • Impeller and openings in the impeller which connect the suction side with the back of the impeller.
  • Another possibility is to relieve the pump shaft from the axial pressure by means of a suitable relief device, such as, for example, a relief ring or piston.
  • a relief piston is also comparatively complex and is therefore mainly used in larger, multi-stage pumps Sealing gaps are provided on both sides of the impeller and openings in the impeller
  • axial thrust compensation by means of sealing gaps on both sides of the impeller and openings in the impeller is only possible when the impellers are closed en impellers with small specific speeds n q , the problem of production arises, since the outlet widths of such impellers are in the range of a few mm and the manufacture of closed impellers with small outlet widths is technically difficult and complex.
  • a further disadvantage of closed impellers is the high wheel friction losses (also called wheel side friction losses) and leakage losses which such impellers have at a low specific speed n q .
  • n q the specific speed of, for example, 8 min. "1 alone the wheel friction loss is 30% or more. Closed impellers for low specific speeds n q therefore have a comparatively low efficiency.
  • impellers for specific speeds n q are less than 10 or 15 minutes. "1 is often half-open. This has casting advantages and the wheel friction of half-open impellers is significantly lower than that of closed impellers.
  • Half-open impellers for specific speeds n q less than 10 or 15 min. " 1 have the disadvantage that axial thrust compensation is difficult and Wheel friction losses are still very high.
  • An additional problem of closed and half-open impellers for small specific speeds n q is the tendency to instability in the partial load range, ie such impellers have a characteristic curve that is either unstable (corresponding to a falling characteristic curve when the flow rate Q approaches zero) or only slightly is stable (corresponding to a characteristic curve with no appreciable increase if Q approaches zero).
  • the object of the invention is to provide an impeller for pumps, in particular radial pumps, which is less than 15 min even at specific speeds n q . "1 enables reliable axial thrust compensation, is comparatively inexpensive to produce, has lower wheel friction losses compared to a suitably dimensioned closed or semi-open impeller and has a stable characteristic curve in the part-load range.
  • Another object of the invention is a pump, in particular a radial pump, with such an impeller to provide and a method for operating such a pump.
  • the impeller according to the invention for pumps, in particular radial pumps comprises one or more blades and additionally an intermediate wall on which one or more blades are provided on each side. At least one passage is formed in the intermediate wall of the impeller in order to distribute a desired delivery flow to the blades on both sides of the intermediate wall.
  • the impeller preferably has a suction side which, when the impeller is installed, is directed toward a suction opening of the pump, and the blades on the side of the intermediate wall facing away from the suction side are preferably connected to the suction side via the at least one passage.
  • the impeller has one hub and several in a region of the impeller adjacent to the hub
  • the impeller is open on the suction side or on both sides.
  • the blades comprise shortened blades, so-called splinter vanes.
  • the impeller preferably has a specific speed n q in the range from 2 to 20 min. "1 , especially in the range of 5 - 12 min. " 1,.
  • the blade exit edges are preferably beveled on the suction side and / or on the side of the intermediate wall facing away from the suction side.
  • a bevel of the blades on the suction side, which slopes towards the suction side, is advantageous, while the blades on the side of the intermediate wall facing away from the suction side have axially parallel exit edges.
  • the bevelling of the blade trailing edges supports an orderly circulation, which is particularly advantageous in the partial load range.
  • the blades on both sides of the intermediate wall are preferably designed in such a way that an orderly circulation occurs at partial load and the impeller has a characteristic curve that rises steadily, in particular steadily and significantly rises, when the flow rate Q approaches zero.
  • the blades are preferably designed differently on both sides of the intermediate wall, for example in that the blades on both sides of the intermediate wall have different bevels of the exit edges and / or different blade outlet angles ⁇ 2 and / or different blade numbers.
  • the invention further comprises a pump, in particular a radial pump, with an impeller as described above.
  • the impeller is additionally provided with an intermediate wall, on each of which one or more blades are provided, and with at least one passage which connects the two sides.
  • a desired delivery flow is distributed to the blades on both sides of the intermediate wall, preferably by leading a part of the delivery flow through the at least one passage from one side of the intermediate wall to the other side.
  • the impeller according to the invention has the advantage that the distribution of the flow rate onto the blades on both sides of the intermediate wall enables reliable axial thrust compensation.
  • the impeller is characterized by a stable characteristic curve and a stable part-load behavior. In the open form, the impeller according to the invention enables a good one
  • FIG. 1a is an oblique view of an embodiment of an impeller according to the present invention
  • FIG. 1b shows the embodiment of an impeller shown in Fig. 1a from the front
  • Fig. 2 is a detailed view of an embodiment with a shortened partition
  • Fig. 3 shows an embodiment of a process pump with an impeller according to the present invention.
  • FIGS. 1 a and 1 b show an embodiment of an impeller for pumps, in particular radial pumps, according to the present invention.
  • the impeller 1 of the exemplary embodiment comprises a hub 4, a Intermediate wall 6, on each of which one or more blades 2a, 2'a, 2b, 2'b are provided, and a passage 3 which, for example, as shown in FIGS. 1 a and 1 b, in the form of five Passage openings is formed in order to distribute a desired delivery flow to the blades 2a, 2'a, 2b, 2'b on both sides of the intermediate wall 6.
  • the passage openings are formed in an area of the impeller adjacent to the hub 4.
  • other designs of the passage 3 are also possible.
  • the impeller 1 expediently has a suction side 5a which, in the installed state of the impeller, is directed toward a suction opening of the pump, and the blades 2b, 2'b on the side 5b of the intermediate wall facing away from the suction side are above the passage 3, ie in the shown example via the five passage openings, connected to the suction side 5a.
  • the impeller 1 is open on both sides. However, it is also possible that the impeller is only open on one side, for example the suction side 5a, or is also closed if necessary.
  • shortened blades 2'a, 2'b, so-called splitter vanes are provided between the passage openings and the wheel circumference.
  • the blade edges are chamfered at the outlet.
  • the blade exit edges on the suction side 5a are double beveled, once they have a bevel toward the suction side and additionally a profiling on the pressure side (taper). If required, as shown in FIGS.
  • the blade leading edges on the suction side 5 a can be provided with a profile on the suction side.
  • all blades 2a, 2'a, 2b, 2'b run straight outward in the radial direction.
  • the blade entry angle ß 1 and the blade exit angle ß 2 are therefore both 90 ° in a first approximation.
  • the actual blade exit angle ⁇ 2 on the suction side 5a is slightly smaller than as a result of the profiling of the blade exit edge on the pressure side 90 °.
  • the blade entry angle is SSI less than the vane outlet angle ß 2 and preferably less than or equal to 90 °.
  • the blades 2a, 2'a, 2b, 2'b at least on one side, preferably on the suction side 5a, a vane inlet width b, which is greater than the vane outlet width B2.
  • the blade inlet widths bi on the suction side 5a and the side 5b facing away from the suction side are expediently determined in such a way that good absorbency is obtained.
  • the ratio of the blade widths on the suction side 5a and the side 5b facing away from the suction side can be selected within wide limits. In a typical design variant, the blade widths are approximately the same size on both sides.
  • the impeller 1 has a specific speed n q in the range from 2 to 20 min. "1 on, preferably in the range of 7-12 minutes. " 1 .
  • the impeller comprises an intermediate wall 6, the outside diameter of which is smaller than the outside diameter of the impeller.
  • a blade 2a, 2b is formed, which unite at the outer end, so that the two blades have a common trailing edge 7.
  • the intermediate wall 6 and the blades 2a, 2b are arranged on a hub 4.
  • a passage 3 is formed in a region of the impeller adjoining the hub 4, which connects the two sides of the intermediate wall 6 in a fluid-conducting manner. Since the partition 6 in this
  • the intermediate wall can optionally be referred to as an intermediate web.
  • the pump 10 of the present exemplary embodiment comprises an impeller 1, for example an open impeller according to the exemplary embodiment described above, with a hub 4, an intermediate wall 6, on each of which blades 2a, 2b are provided, and with a passage 3 in order to distribute a desired flow to the blades 2a, 2b on both sides of the intermediate wall 6.
  • the pump 10 further comprises a housing 11, an inlet or suction opening 12, an annular channel 17a, which connects to the outside of the impeller 1, a diffuser insert 17 and an annular space 17b which opens into an outlet or pressure connection 13.
  • a spiral or an annular space can also be generated, which are connected directly to the outlet or pressure connection 13.
  • the diffuser insert 17 By adapting the diffuser insert 17, it is possible to compensate for the radial thrust that is usually considerable in pumps with low specific speeds.
  • a cast housing without replaceable insert can also be used as the guide device.
  • the pump further comprises a shaft 14, a shaft seal 15, for example a stuffing box, and bearings 16a, 16b for mounting the shaft.
  • the bearings 16a, 16b are designed as ball bearings which, depending on the design, can absorb radial as well as axial forces.
  • the bearings 16b on the right in the picture are specially designed to absorb radial and axial forces, so that any remaining component of the axial thrust, which is not fully balanced, can be easily accommodated.
  • the impeller 1 is additionally provided with an intermediate wall 6, on each of which one or more blades 2a, 2b are provided and with a passage 3, which connects the two sides of the intermediate wall 6 in a fluid-conducting manner.
  • a desired delivery flow is distributed to the blades 2a, 2b on both sides of the intermediate wall 6 by a part of the delivery flow, for example between 5 and 75% and preferably about 50% through the passage 3 from one side of the intermediate wall 6 is led to the other side.
  • the flow rate of the impeller 1 is advantageously divided between the blades 2a, 2b on both sides in such a way that the axial thrust is compensated for.
  • the embodiment of the inventive described above The process can be used in both single-stage and multi-stage pumps.
  • the impeller according to the invention has the advantage that the distribution of the delivery flow onto the blades on both sides of the intermediate wall enables simple and practically complete axial thrust compensation.
  • the impeller described above is also characterized by a stable characteristic curve and good efficiency.
  • the impeller according to the invention can be used both in single-stage and in multi-stage pumps.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Arrangement And Driving Of Transmission Devices (AREA)
EP04738061A 2003-08-04 2004-07-05 Roue a aubes destinee a des pompes Expired - Lifetime EP1651869B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04738061A EP1651869B1 (fr) 2003-08-04 2004-07-05 Roue a aubes destinee a des pompes

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP03405575 2003-08-04
EP04738061A EP1651869B1 (fr) 2003-08-04 2004-07-05 Roue a aubes destinee a des pompes
PCT/CH2004/000420 WO2005012732A1 (fr) 2003-08-04 2004-07-05 Roue a aubes destinee a des pompes

Publications (2)

Publication Number Publication Date
EP1651869A1 true EP1651869A1 (fr) 2006-05-03
EP1651869B1 EP1651869B1 (fr) 2008-02-20

Family

ID=34112505

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04738061A Expired - Lifetime EP1651869B1 (fr) 2003-08-04 2004-07-05 Roue a aubes destinee a des pompes

Country Status (7)

Country Link
US (1) US8444370B2 (fr)
EP (1) EP1651869B1 (fr)
CN (1) CN100449155C (fr)
AT (1) ATE386885T1 (fr)
BR (1) BRPI0413265B1 (fr)
DE (1) DE502004006266D1 (fr)
WO (1) WO2005012732A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10514042B2 (en) 2013-06-21 2019-12-24 Flow Control LLC Debris removing impeller back vane

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4935048B2 (ja) * 2005-10-27 2012-05-23 日本電産株式会社 遠心ファン
WO2009070599A1 (fr) * 2007-11-27 2009-06-04 Emerson Electric Co. Ventilateur de refroidissement bidirectionnel
CA2736952C (fr) 2008-09-10 2016-11-29 Pentair Pump Group, Inc. Pompe centrifuge multi-etages a haut rendement et procede de montage
US20100061841A1 (en) * 2008-09-11 2010-03-11 Visintainer Robert J Froth handling pump
US8221070B2 (en) * 2009-03-25 2012-07-17 Woodward, Inc. Centrifugal impeller with controlled force balance
FR2945330B1 (fr) * 2009-05-11 2011-07-15 Snecma Pompe centrifuge a double echappement.
ITFI20120210A1 (it) * 2012-10-15 2014-04-16 Nuovo Pignone Srl "high efficiency low specific speed centrifugal pump"
EP3366926B1 (fr) * 2017-02-22 2020-12-02 Borgwarner Inc. Rouet de compresseur avec nervures courbées sur la face arrière du disque du rouet
US10851801B2 (en) 2018-03-02 2020-12-01 Ingersoll-Rand Industrial U.S., Inc. Centrifugal compressor system and diffuser
WO2020046799A1 (fr) * 2018-08-27 2020-03-05 The Texas A&M University System Turbomachines a haute densité energetique
CN110319053A (zh) * 2019-08-12 2019-10-11 烟台阳光泵业有限公司 开式叶轮及使用开式叶轮的小流量高扬程单级离心泵
US11136989B2 (en) * 2019-08-26 2021-10-05 Ruhrpumpen Sa De Cv Impeller for centrifugal radial pump
KR20210098012A (ko) * 2020-01-31 2021-08-10 엘지전자 주식회사 펌프
JP7375694B2 (ja) * 2020-07-15 2023-11-08 株式会社豊田自動織機 遠心圧縮機
CN112814913B (zh) * 2021-01-07 2023-05-05 新乡航空工业(集团)有限公司上海分公司 一种单进口双面叶轮离心泵
CN114320962A (zh) * 2021-11-10 2022-04-12 浙江环誉泵业科技有限公司 一种冷却风机
US11680578B1 (en) 2022-04-21 2023-06-20 Mxq, Llc Impeller for disc pump

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10514042B2 (en) 2013-06-21 2019-12-24 Flow Control LLC Debris removing impeller back vane

Also Published As

Publication number Publication date
ATE386885T1 (de) 2008-03-15
DE502004006266D1 (de) 2008-04-03
CN100449155C (zh) 2009-01-07
BRPI0413265A (pt) 2006-10-10
EP1651869B1 (fr) 2008-02-20
BRPI0413265B1 (pt) 2014-04-29
US20080213093A1 (en) 2008-09-04
WO2005012732A1 (fr) 2005-02-10
US8444370B2 (en) 2013-05-21
CN1833107A (zh) 2006-09-13

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