US3738769A - Housing for centrifugal pumps - Google Patents

Housing for centrifugal pumps Download PDF

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Publication number
US3738769A
US3738769A US00188706A US3738769DA US3738769A US 3738769 A US3738769 A US 3738769A US 00188706 A US00188706 A US 00188706A US 3738769D A US3738769D A US 3738769DA US 3738769 A US3738769 A US 3738769A
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United States
Prior art keywords
annular
housing
members
ribs
wearing ring
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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.)
Expired - Lifetime
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US00188706A
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English (en)
Inventor
W Hanagarth
R Schafer
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.)
Klein Schanzlin and Becker AG
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Klein Schanzlin and Becker AG
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Publication date
Application filed by Klein Schanzlin and Becker AG filed Critical Klein Schanzlin and Becker AG
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Publication of US3738769A publication Critical patent/US3738769A/en
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    • 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
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S415/00—Rotary kinetic fluid motors or pumps
    • Y10S415/912—Interchangeable parts to vary pumping capacity or size of pump

Definitions

  • ABSTRACT 9 Claims 3 Drawing Figures HOUSING FOR CENTRIFUGAL PUMPS BACKGROUND OF THE INVENTION A are mounted in the interior of the housing are insertable and withdrawable at the suction side of the pump.
  • the maximum number of suction lids has to equal the number of different pump sizes. That portion of the housing which is adjacent to the outlet side is fixedly connected with the volute casing, and such portion is normally provided with a flange of predetermined size for connection to the floor frame or base.
  • a single base is capable of supporting any one of an entire series of differently dimensioned pump housings.
  • a relatively small number of differently dimensioned bases will normally suffice to support pump housings varying from a minimum size to a maximum size whereby each base can support a given series of differently dimensioned housing.
  • the number of differently dimensioned bases depends only on the desired number of output ranges.
  • Such mode of constructing centrifugal pumps exhibits the advantage of necessitating a relatively small number of parts. How.- ever, it also exhibits a serious drawback, namely, that the conduit must be disconnected at least at the inlet side whenever it becomes necessary to remove or replace the impeller or runner of the centrifugal pump. This is undesirable, particularly in certain branches of the chemical and petro-chemical industry.
  • the number of sleeves for stuffing boxes depends on the required number of different diameters of runners which are needed for the entire series of pumps, on the number of necessary bearing carrier sizes, as well as on the need for different types of devices to compensate for axial hydraulic thrusts.
  • the number of bearing carriers in a centrifugal pump of the just discussed type will depend not only on the desired number of output ranges but also on the number of utilized runner diameters.
  • the auxiliary equipment for the cooling or heating of stuffing boxes in such centrifugal pumps is quite complex and expensive; such equipment normally employs cooling covers or the like.
  • An object of the invention is to provide a novel and improved housing for a centrifugal pump which is sim pler, more versatile and less expensive than presently known centrifugal pump housings.
  • Another object of the invention is to provide a housing whose components can be used for the assembly of centrifugal pumps with widely different outputs.
  • a further object of the invention is to provide a centrifugal pump housing which is constructed and assembled in such a way that it allows an operator to gain access to the runner without necessitating a substantial dismantling of the housing.
  • An additional object of the invention is to provide a novel and improved wearing ring for use in the housing of a centrifugal pump.
  • Still another object of the invention is to provide a centrifugal pump housing whose component parts occupy in storage less room than the component parts of presently known housings.
  • a further object of the invention is to provide a centrifugal pump housing which comprises fewer and simpler components than presently known housings.
  • the centrifugal pump housing of the present invention comprises an annular inlet section having a substantially radially extending flange member which is preferably integral with a shaft sleeve and a cylindrical portion for reception of one or more stuffing boxes, a volute casing, and a wearing ring member which is interposed between the flange member and the volute casing.
  • one of the members has several concentric first'annular ribs ofdifferent diameters and the other member has a second annular rib which is in sealing engagement with one of the first ribs.
  • the one member is the wearing ring member
  • such wearing ring member can be assembled with two or more differently dimensioned annular sections as long as each of the several sections comprises a flange member having a second. rib which can be placed into proper sealing engagement with one of several first ribs on the wearing ring member.
  • any given section can be assembled with one of several differently dimensioned wearing ring members as long as each such wearing ring member comprises a rib which can be placed into proper sealing engagement with one rib of the flange member.
  • FIG. 1 is a fragmentary axial sectional view of a centrifugal pump whose housing is constructed and assembled in accordance with a first embodiment of the invention
  • FIG. 2 is a similar fragmentary axial sectional view of a centrifugal pump having a housing which is constructed and assembled in accordance with a second embodiment of the invention.
  • FIG. 3 is a fragmentary axial sectional view of a centrifugal pump whose housing is constructed and assembled in accordance with a third embodiment of the invention.
  • FIG. 1 there is shown a portion of a centrifugal pump whose housing comprises an annular inlet section I having a shaft sleeve 2, a cylindrical section 1 which accommodates the stuffing box SB and a radial flange member 3.
  • the sleeve 2 surrounds the antifriction bearings (not shown) for the shaft 17 which drives an impeller or runner 9.
  • the flange member 3 is bolted to a wearing or sealing ring member 5 which is interposed between the flange member 3 and a volute casing 6.
  • the flange member 3 has a concentric annular rib 4 the outer diameter of which matches the internal diameter of one of several concentric annular ribs (4', 4", 4") of the wearing ring member 5.
  • the latter has a radially outwardly extending collar 7 which is bolted or screwed directly to the volute casing 6.
  • An annular external surface 8 of the collar 7 is in sealing abutment with a complementary annular internal surface of the volute casing 6.
  • the dimensions of the collar 7 and surface 8 depend on the diameter of the runner 9. In the embodiment of FIG.
  • the external surface of the rib 4 on the flange member 3 is sealingly engaged by a complementary internal surface of the outermost rib 4" on the wearing ring member 5.
  • a single rib 4 ofa smaller flange member 3 forming part of a differently dimensioned annular section I (not shown) will be placed into sealing engagement with the internal surface of the rib 4 or 4" on the wearing ring member 5.
  • the illustrated wearing ring member 5 can be assembled with at least two differently dimensioned annular inlet sections I.
  • a sealing element 10 which prevents leakage of fluid between the chamber for the runner 9 and a heating or cooling compartment 11 between the members 3 and 5.
  • the diameters of the foremost parts of cylindrical portions 1 on housing section I of different sizes are preferably the same so that the illustrated wearing ring member 5 can properly seal the chamber for the runner 9 from the compartment 11 which is defined with a larger or smaller section I.
  • the centrifugal pump is designed for transport of a hot liquid (c.g., water)
  • the compartment 11 will be used for the circulation of a suitable coolant which prevents excessive heating of the cylindrical portion 1 and stuffing box SB.
  • the compartment 11 can be subdivided into two or more smaller portions, e.g. by the provision of an axially extending partition 12 on the wearing ring member 5.
  • the partition 12 carries the smallest-diameter rib 4 and subdivides the compartment 11 into an inner or cooling portion 11 and an outer portion 11b.
  • the cooling action of fluid which circulates through the inner compartment portion 11a is very effective in the region of the cylindrical portion 1 of the housing section I.
  • a port 15 in the wearing ring member 5 is sealed together with a port 16 in the cylindrical portion 1, and the ports 13, 14 in the flange member 3 are opened for circulation of a coolant which is drawn from a suitable source, not shown.
  • the ports 13, 14 are sealed and the port 15 is opened together with the port 16 so that the liquid which is being compressed in the volute casing 6 can be admitted into the compartment portion 11a.
  • the wearing ring member 5 can be provided with an annulus of sealable ports 15, the flange member 3 can be provided with several pairs of scalable ports 13, 14, and the cylindrical portion I can have several ports 16. If the pump of FIG. 1 is used for transport of corrosive fluids, the surfaces which come into contact with such fluids are coated with layers of material which can stand the corrosive influence.
  • the wearing ring member 5 can be used with at least two and preferably three differently dimensioned annular housing sections I, depending on the diameter of the rib 4 on the flange member 3 of the utilized section I.
  • the wearing ring member 5 has at least two but preferably more concentric annular ribs 4, 4", 4" with annular surfaces each of which is complementary to the surface on the rib 4 of a differently dimensioned flange member 3.
  • the number of ribs on the wearing ring member 5 will depend on the number of differently dimensioned housing sections I which can be utilized with a particular runner 9 and volute casing 6, i.e., on the number of differently dimensioned housing sections l which can be used with the parts 5,6, and 9 for achieving a particular range of output.
  • the sealing element 10 can be omitted if the radially innermost portion of the wearing ring member 5 engages the cylindrical portion 1 of the annular section I with a requisite sealing action or if the clearance between the cylindrical portion 1 and the radially innermost portion of the wearing ring member 5 is within the permissible range.
  • the sealing action between the innermost portion of the wearing ring member 5 and'the cylindrical portion 1 of the annular section I can be achieved by utilizing a detachable flange or ring, not shown.
  • the outer diameters of the foremost parts of cylindrical portions 1 on all sections I which are intended for assembly with the parts 5, 6, 9 of FIG. 1 are preferably such that the cylindrical portion of the selected section I is receivable in the radially innermost portion of the wearing ring member 5 (at the sealing element 10) with a predetermined clearance.
  • the pump housing section (not shown) at the discharge end need not be dismantled if the operator wishes to gain access to the runner 9; the operator then simply removes the section I and the wearing ring 5 whereby the runner 9 is freely accessible at the right-hand side of the volute casing 6.
  • the minimum diameter of the external surface 8 exceeds the maximum diameter of the runner 9.
  • FIG. 2 illustrates a portion of a second centrifugal pump wherein the housing constitutes a simplified version of the housing shown in FIG. 1.
  • the dimensions of the annular housing section II, wearing ring member 105 and volute casing 106 are selected in such a way that the collar 107 of the wearing ring member 105 is insertable between the radially outermost portion of the section II and the volute casing 106.
  • the external cylindrical surface 108 of the wearing ring member 105 has the same diameter as the adjacent internal cylindrical surface of the volute casing 106. Furthermore, the diameter of the surface 108 equals the diameter of the external surface of the single concentric rib 104 on the flange member 103.
  • the rib 104 engages the outer one of the two concentric annular ribs 104', 104" on the wearing ring member 105. Such dimensioning enhances the appearance of the pump housing. It will be noted that the external surfaces of the collar 107, flange 103 and the adjoining portion of the casing 106' have identical diameters. All other parts of the pump shown in FIG. 2 are analogous to the corresponding parts of the pump which is illustrated in FIG. 1 and are denoted by similar reference characters plus 100. The
  • wearing ring member 105 can be assembled with at one of which is engaged by the rib 204' on the wearing ring member 205.
  • This wearing ring member 205 is one of several wearing ring members which can be used with the housing section III for the assembly of a complete housing.
  • the wearing ring member 205 is further sealingly connected with a volute 206 which surrounds an impeller or runner 209.
  • the parts 205 and III of the housing shown in FIG. 3 define a single compartment 211 and the ports 213, 214, 215, 216 shown in FIG. 3 perform the same functions as the similarly referenced ports of FIG. 1.
  • the housing of FIG. 3 bears acertain resemblance to the housing of FIG.
  • the outermost portion of the flange member 203 can be removed by machining. This not only enhances the appearance of the housing but also allows for a more efficient insulation of the housing from the outside (all the way to the collar 207), for example, when the centrifugal pump is to transport a hot liquid.
  • the diameter of the surface 208 equals the diameter of the external surface on the rib 204b.
  • FIGS. 1 and 3 The main difference between the construction of FIGS. 1 and 3 is that the flange 3 of the annular section I has a single rib 4 and the wearing ring member 5 has several ribs 4,4",4" one of which can be sealingly engaged by the rib 4 on a differently dimensioned flange member 3, whereas the wearing ring member 205 has a single rib 204' but the flange member 203 of the section III has several concentric ribs 204, 204a, 204b so that the section III can be assembled with a number of differently dimensioned wearing ring members 205 and volute casings 206.
  • the improved pump housing exhibits the advantage that it can remain closed atthe discharge or outlet side and that the parts at the inlet side are constructed and assembled in such a way that a smaller number of such parts is necessary to assemble an entire range of contrifugal pumps which can employ at least one ofa series of identically dimensioned parts, such as the parts 5, 6, 9 of FIG. 1 or the annular section III of FIG. 3.
  • the advantages of a pump housing which can remain closed at the outlet side when the operator wishes to gain access to the runner were outlined hereinbefore.
  • a housing comprising an annular section constituting a one-piece casting having a substantially radially extending flange member; a volute casing; and a wearing ring member interposed between said casing and said flange member, one of said members having a plurality of first annular sealing ribs and the other of said members having a second annular sealing rib in sealing engagement with one of said first ribs.
  • a housing comprising an annular section having a substantially radially extending flange member, a shaft sleeve and a cylindrical portion coaxial with said shaft sleeve, said shaft sleeve being integral with said flange member and said cylindrical portion; a volute casing; and a wearing ring member interposed between said casing and said flange member, one of said members having a plurality of first annular sealing ribs and the other of said members having a second annular sealing rib in sealing engagement with one of said first ribs.
  • said wearing ring member further comprises a radially innermost portion having a first predetermined internal diameter and said cylindrical portion includes an external surface having a second predetermined diameter and being surrounded by said internal surface, said other member forming part of a plurality of differently dimensioned other members each having a second annular rib which is movable into sealing engagement with one of said first ribs and the diameters of surfaces on each of said series of other members being identical.
  • a housing comprising an annular section having a substantially radially extending flange member; a volute casing; a wearing ring member interposed between said casing and said flange member, one of said members having a plurality of first annular sealing ribs and the other of said members having a second annular sealing rib in sealing engagement with one of said first ribs; and a plurality of additional other members each having a second sealing rib, each of said additional other members being assemblable with said one member as a substitute for said first mentioned other member and the second sealing rib of each additional other member being movable into sealing engagement with one of said first ribs.
  • a housing comprising an annular section having a substantially radially extending flange member; a volute casing; and a wearing ring member interposed between said casing and said flange member, one of said members having a plurality of first annular sealing ribs and the other of said members having a second annular sealing rib in sealing engagement with one of said first ribs, said section defining with said wearing ring member an annular compartment and said wearing ring member having at least one sealable first port adapted to establish communication between said compartment and the interior of said volute casing, said flange member having at least one sealable second port adapted to communicate with said compartment and said section further having a cylindrical portion provided with at least one sealable third port adapted to communicate with said compartment.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US00188706A 1970-09-16 1971-09-16 Housing for centrifugal pumps Expired - Lifetime US3738769A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2045685A DE2045685C3 (de) 1970-09-16 1970-09-16 Kreiselpumpe

Publications (1)

Publication Number Publication Date
US3738769A true US3738769A (en) 1973-06-12

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ID=5782534

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US00188706A Expired - Lifetime US3738769A (en) 1970-09-16 1971-09-16 Housing for centrifugal pumps

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US (1) US3738769A (enExample)
AT (1) AT305777B (enExample)
CH (1) CH537528A (enExample)
DE (1) DE2045685C3 (enExample)
FR (1) FR2107740A5 (enExample)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0716479A3 (en) * 1994-12-07 1997-04-23 Sumitomo Wiring Systems Connector assembly with cooperating contact elements and method of connection
US20100068046A1 (en) * 2008-09-12 2010-03-18 Gm Global Technology Operations, Inc. Volute of lower end unit of fuel cell system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19653936A1 (de) 1996-12-21 1998-06-25 Klein Schanzlin & Becker Ag Kreiselpumpengehäuse
DE102013201902A1 (de) 2012-02-08 2013-08-08 Ksb Aktiengesellschaft Kreiselpumpe und Baureihe von Kreiselpumpen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2021346A (en) * 1932-05-17 1935-11-19 Allen Sherman Hoff Co Sealing ring
US3512788A (en) * 1967-11-01 1970-05-19 Allis Chalmers Mfg Co Self-adjusting wearing rings

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2021346A (en) * 1932-05-17 1935-11-19 Allen Sherman Hoff Co Sealing ring
US3512788A (en) * 1967-11-01 1970-05-19 Allis Chalmers Mfg Co Self-adjusting wearing rings

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0716479A3 (en) * 1994-12-07 1997-04-23 Sumitomo Wiring Systems Connector assembly with cooperating contact elements and method of connection
US20100068046A1 (en) * 2008-09-12 2010-03-18 Gm Global Technology Operations, Inc. Volute of lower end unit of fuel cell system

Also Published As

Publication number Publication date
FR2107740A5 (enExample) 1972-05-05
DE2045685A1 (de) 1972-05-31
AT305777B (de) 1973-03-12
DE2045685C3 (de) 1974-05-16
CH537528A (de) 1973-05-31
DE2045685B2 (enExample) 1973-10-11

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