EP0466350A2 - Mehrstufige Kreiselpumpe - Google Patents

Mehrstufige Kreiselpumpe Download PDF

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Publication number
EP0466350A2
EP0466350A2 EP91305692A EP91305692A EP0466350A2 EP 0466350 A2 EP0466350 A2 EP 0466350A2 EP 91305692 A EP91305692 A EP 91305692A EP 91305692 A EP91305692 A EP 91305692A EP 0466350 A2 EP0466350 A2 EP 0466350A2
Authority
EP
European Patent Office
Prior art keywords
pin
bushing
casing
ring
split
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
EP91305692A
Other languages
English (en)
French (fr)
Other versions
EP0466350B1 (de
EP0466350A3 (en
Inventor
Peter Thompson
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.)
Clyde Union DB Ltd
Original Assignee
David Brown Engineering 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 David Brown Engineering Ltd filed Critical David Brown Engineering Ltd
Publication of EP0466350A2 publication Critical patent/EP0466350A2/de
Publication of EP0466350A3 publication Critical patent/EP0466350A3/en
Application granted granted Critical
Publication of EP0466350B1 publication Critical patent/EP0466350B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • F04D29/167—Sealings between pressure and suction sides especially adapted for liquid pumps of a centrifugal 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
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D1/06—Multi-stage pumps

Definitions

  • This invention relates to multi-stage centrifugal pumps, and more particularly to means for preventing rotation of an inter-stage bushing or ring in a multi-stage centrifugal pump with an axially split casing which houses a shaft carrying impellers.
  • a multi-stage centrifugal pump has a number of inter-stage bushings and rings, sometimes called stage pieces and wear rings, which fit within the casing and have to be accurately positioned radially and locked against axial and rotational movement.
  • These bushings and rings have essentially the same function as one another, namely to seal each side of each impeller, but the bushings have a larger radial thickness and may carry integral guide vanes for the incoming fluid whereas the rings have a smaller radial thickness and lack guide vanes.
  • Radial positioning is by means of a close fit between the periphery of the bushing or ring and a bore machined in the casing.
  • Axial location is by means of a flange on the bushing or ring which engages in an annular groove machined in the casing.
  • each bushing or ring has been prevented from rotating by means of a small pin fitted into a radial hole drilled in the base of the annular groove, said pin protruding into an axial slot machined in the flange.
  • the pins have been fitted in the lower half of the casing in the vertical plane containing the pump axis, so that the axial slots in the bushings and rings could be engaged with the pins during the assembly of the shaft and impellers into the lower half of the casing.
  • the object of the present invention is to avoid the aforesaid disadvantages.
  • means for preventing rotation of an inter-stage bushing or ring in a multi-stage centrifugal pump with an axially split casing which houses a shaft carrying impellers are characterised by a tangential pin fitted into a hole provided in either half of the casing at its join face, the centre-line of the pin being normal to the join face and the exposed end of the pin being flush with said face, and a recess in which the pin engages provided in the periphery of the bushing or ring.
  • a multi-stage centrifugal pump has a casing indicated generally at 10 which is split axially in a horizontal plane and houses a power-driven shaft 12 on which there are rigidly secured a plurality of impellers 14.
  • Each impeller 14 is disposed in a chamber 16 having an axial inlet 18 and a radial outlet 20, the chambers 16 being connected in series in well-known manner.
  • An inter-stage ring 22 is disposed at the inlet side of each impeller 14, and an inter-stage bushing 24 carrying integral guide means 25 for the incoming fluid is disposed at the other side thereof.
  • each bushing 24 and ring 22 is diametrically split in a plane 26 incline at, say, 10° to the horizontal, the split being below the joint face 28 of the casing 10 at that side of the casing 10 where the periphery of the rotating shaft 12 moves upwardly.
  • the two halves of each bushing 24 (and ring 22) are located together by dowels 30.
  • Each bushing 24 (and ring 22) is prevented from rotating by a tangential pin 32 (see Figure 2) driven into a hole 34 machined in the upper half 36 of the casing 10 at its joint face 28, the centre-line 29 of the pin 32 being normal to the joint face 28 and the exposed end 37 of the pin 32 being flush with the joint face 28.
  • the pin 32 engages in a recess 38 machined in a flange 40 on the upper half 42 of the bushing 24 (or ring 22) the recess 38 including a shoulder 44 against which the exposed end 37 of the pin 32 abuts.
  • the flange 40 engages in known manner in an annular groove 45 machined in the casing 10.
  • the exposed end 37 of the pin 32 may be slightly short of the joint face 28 of the casing 10 without departing from the scope of the invention, but it must not protrude beyond said face.
  • the pin 32 is positioned at that side of the casing 10 which places said pin under compression if the bushing 24 (or ring 22) tends to rotate in the same direction as the shaft 12.
  • the recess 38 is machined in a suitable part of the periphery of the bushing 24 (or ring 22) other than the axial location flange 40 thereon.
  • the pin 32 can be much larger than the radial pin used hitherto and is in compression, not shear, so that it will readily withstand all anticipated loadings; there is a greater certainty of correct engagement of the pin 32 in the recess 38, and if engagement is not achieved further assembly of the pump is prevented; and, in cases where the bushing 24 (or ring 22) is diametrically split and the pin 32 is fitted in the upper half 36 of the casing 10, the lower half 48 of the bushing 24 or ring 22 can be rotated to enable it to be removed without lifting the shaft.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
EP91305692A 1990-07-07 1991-06-24 Mehrstufige Kreiselpumpe Expired - Lifetime EP0466350B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB909015047A GB9015047D0 (en) 1990-07-07 1990-07-07 Multi-stage centrifugal pumps
GB9015047 1990-07-07

Publications (3)

Publication Number Publication Date
EP0466350A2 true EP0466350A2 (de) 1992-01-15
EP0466350A3 EP0466350A3 (en) 1992-02-26
EP0466350B1 EP0466350B1 (de) 1994-06-08

Family

ID=10678810

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91305692A Expired - Lifetime EP0466350B1 (de) 1990-07-07 1991-06-24 Mehrstufige Kreiselpumpe

Country Status (6)

Country Link
EP (1) EP0466350B1 (de)
AT (1) ATE106994T1 (de)
CA (1) CA2046465C (de)
DE (1) DE69102357T2 (de)
ES (1) ES2057773T3 (de)
GB (1) GB9015047D0 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2410297A (en) * 2004-01-21 2005-07-27 Weir Pumps Ltd Split casing for a multi-stage pump
DE102008033073B3 (de) * 2008-07-15 2009-12-03 Ruhrpumpen Gmbh Zentrifugalpumpe
CN103291462A (zh) * 2013-01-05 2013-09-11 中国航空工业集团公司西安飞机设计研究所 一种分体式燃油泵排油方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB100858A (en) * 1916-03-29 1916-07-20 G & J Weir Ltd Improvements in Centrifugal or the like Pumps.
US1639279A (en) * 1923-05-16 1927-08-16 Frederick Iron And Steel Compa Wearing ring for rotary elements
US1743348A (en) * 1928-05-07 1930-01-14 Byron Jackson Pump Co Centrifugal-pump assembly
FR850685A (fr) * 1938-05-21 1939-12-22 G & J Weir Perfectionnements aux pompes rotatives
DE2158518B2 (de) * 1970-12-21 1980-03-27 Borg-Warner Corp., Chicago, Ill. (V.St.A.) Horizontale mehrstufige Zentrifugalpumpe

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB100858A (en) * 1916-03-29 1916-07-20 G & J Weir Ltd Improvements in Centrifugal or the like Pumps.
US1639279A (en) * 1923-05-16 1927-08-16 Frederick Iron And Steel Compa Wearing ring for rotary elements
US1743348A (en) * 1928-05-07 1930-01-14 Byron Jackson Pump Co Centrifugal-pump assembly
FR850685A (fr) * 1938-05-21 1939-12-22 G & J Weir Perfectionnements aux pompes rotatives
DE2158518B2 (de) * 1970-12-21 1980-03-27 Borg-Warner Corp., Chicago, Ill. (V.St.A.) Horizontale mehrstufige Zentrifugalpumpe

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2410297A (en) * 2004-01-21 2005-07-27 Weir Pumps Ltd Split casing for a multi-stage pump
GB2410297B (en) * 2004-01-21 2007-08-29 Weir Pumps Ltd Pump casing
DE102008033073B3 (de) * 2008-07-15 2009-12-03 Ruhrpumpen Gmbh Zentrifugalpumpe
CN103291462A (zh) * 2013-01-05 2013-09-11 中国航空工业集团公司西安飞机设计研究所 一种分体式燃油泵排油方法
CN103291462B (zh) * 2013-01-05 2015-08-05 中国航空工业集团公司西安飞机设计研究所 一种分体式燃油泵排油方法

Also Published As

Publication number Publication date
CA2046465A1 (en) 1992-01-08
CA2046465C (en) 1998-09-22
ATE106994T1 (de) 1994-06-15
EP0466350B1 (de) 1994-06-08
ES2057773T3 (es) 1994-10-16
EP0466350A3 (en) 1992-02-26
DE69102357D1 (de) 1994-07-14
DE69102357T2 (de) 1995-01-19
GB9015047D0 (en) 1990-08-29

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