US2365058A - Section lined pump shell for dredging - Google Patents

Section lined pump shell for dredging Download PDF

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Publication number
US2365058A
US2365058A US489678A US48967843A US2365058A US 2365058 A US2365058 A US 2365058A US 489678 A US489678 A US 489678A US 48967843 A US48967843 A US 48967843A US 2365058 A US2365058 A US 2365058A
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Prior art keywords
shell
sectors
dredging
pump shell
pump
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Expired - Lifetime
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US489678A
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Millard F Crawford
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Millard F Crawford
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Priority to US489678A priority Critical patent/US2365058A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/40Casings; Connections of working fluid
    • F04D29/42Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • F04D29/4286Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps inside lining, e.g. rubber
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/08Sealings
    • F04D29/16Sealings between pressure and suction sides
    • F04D29/165Sealings between pressure and suction sides especially adapted for liquid pumps
    • F04D29/167Sealings between pressure and suction sides especially adapted for liquid pumps of a centrifugal flow wheel
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/60Mounting; Assembling; Disassembling
    • F04D29/62Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/622Adjusting the clearances between rotary and stationary parts

Description

Dec. 12, 1944. CRAWFORD 2,365,058

SECTION LINED PUMP SHELL FOR DREDGING Filed June 4, 1945 2 Sheets-Sheet 1 1944' M. F. CRAWFORD 2,365,058

SECTION LINED PUMP SHELL FOR-DREDGING Filed June 4, 1945 v Z'Sheets-Sheet 2 ATTDRN EYS Patented Dec. 12, 1944 UNITED STATES :PATENT OFFICE.

SECTION LINED PUMP SHEI'JL FOR DREDGING Millard F. Crawford, Jackson, La.

' Application June 4, 1943',"Serial No. 489,678

3 Claims. I (Cl. 103-114) This invention relates to pumps and more particularly to a section lined pump shell for dredging pumps.

An object of the invention is to provide a complete liner for the inside of centrifugal pumps adapted to resist abrasive wear caused by the pumped material.

A further object is to provide a liner of this type which can be easily and quickly changed at small cost without welding which ordinarily character which will be formed of a few strong, simple and durable parts, which will be inexpensive to manufacture, and easily get out of order.

With the above and other objects in view the invention consists'of certainnovel details of construction and combinations of parts hereinafter fully described and claimed, it being understood that various modifications may be resorted to within the scope of the appended claims without departing from the spirit or sacrificing any of the advantages of the invention.

In the accompanying drawings forming a of this specification:

Figure l is a cross sectional view, with portions in elevation, of a centrifugal pump equipped with a sectional liner constructed in accordance with the invention.

Figure 2 is a longitudinal sectional view taken on the line 22 of Figure 1 with parts in elevation.

Figure 3 is a detail view partly in elevation and partly in section showing the keystone sector of the liner.

Referring now to the drawings in which like characters of reference designate similar parts in the various views, I designates the pump shell which is provided with supporting flanges I l whereby the pump may be anchored to a suitable foundation. The pump impeller 12, which rotates within the shell, is carried by a driven shaft l3. The face plates ll of the shell are bolted to flanges IS on the shell, the shaft l3 being passed through a stuffing box H3 in one of the face plates. An intake pipe I1 is provided with a flange l8 which is bolted to a flange l9 on the other face plate as shown at 20. An outlet pipe 2| is formed integral with the shell at a tangent thereto, see Figure 2. Water pipes 22 enter the first named face plate. These pump parts are conventional.

which will not part In centrifugal pumps of this type, as the pump material moves outwardly within the shell the to minimize the effects of the abrasion as well as to make it possible to remove the parts subjected to this abrasion as will now be described.

An annular lining 23, of abrasive resistant material is mounted on the inner peripheral wall of the shell and comprises a plurality of sectors 24 of U-shape in cross section, the side walls 25 of the sectors being thinner than the bottom portion 26 of the sectors, see Figure 1. The increased thickness of the bottom portion 26 is adapted to resist the maximum abrasion which occurs at the inner periphery of the shell II] where hydraulic pressure and velocity are greatest. The sectors are assembled in the shellas follows; beginning at the outlet pipe 2| the initial sector marked by the legend initial, and which is provided with an extension 21, is first inserted with the extension serving as a liner for the exhaust pipe. The second sector inserted also serves as a liner for the exhaust pipe and is marked by the legend second. The third, fourth, fifth and sixth sectors next laid in sequence are laid on the bottom of the pump shell and are marked with corresponding legends. Next the seventh to the sixteenth sectors are laid in sequence beginning on the opposite side of the initial sector from the second sector and are marked with corresponding legends. This leaves a wedge shaped space between the sixth and the seventeenth sectors for the reception of the keystone sector which is marked with a corresponding legend.

The keystone sector, see Figure 3, in provided with a long shank 28 which extends radially through a nipple 29 in the shell 10. The keystone sector is tapered on both sides to fit between the sixth and seventeenth sectors and tighten all of the sectors when a wedge 30 is driven through a slot 3| in the shank against a pair of metal washers 32 which are disposed on the shank and have a gasket 33 disposed between them on the shank and a second disk gasket 34 disposed between them and the nipple to prevent leakage from the shell.

In further carrying out the invention face plate liners 35 of suitable wear resisting material, are disposed inwardly of the face plates to receive rubbing contact of the impeller, see Figure 1. These liners are secured in place by cap screws 36 and adjusting screws 31 the latter carrying lock nuts 38. The adjusting screws are threaded through face plates and the cap screws are engaged through the adjusting screws and threaded into the liners. By slacking off all of the cap screws 36, and loosening the lock nuts 38, on the adjusting screws 31, the latter may be screwed in or out to adjust the face plate liners to any desired position. After the adjustment is made the lock nuts 38 and cap,screws 36 are retightenedto reserve; the adjustment.

The object of adjusting the face plate liners is to keep them very close to the impeller to prevent the water pressure from dropping. If the water pressure is not maintained the;abr.asive;rnatertal will work in between the impeller and the liners and wear out both rapidly. Withthis type got adjustment it is easy to keep the face plateliners very close to the impellers 0,11 :-.ither ;side,;a llgthe way round even though the impeller is not in perfect line with the shell.

f' Th materielfiom which-the.- liners ofr-thezshell z-an ut f plate is. constructed varie in a qr n -wit ;th mate ial' heinap mped -For exampl i a d mate ial be n pum ed th ,liners may :be donned ofracid :resisting material' will be fully understood without further explanation.

What is claimed is:

1. The combination with the U-shaped peripheral wall of a centrifugal pump shell, of U-shaped sectors having their legs relatively thinner than the bottoms of the sectors, said sectors being received against the inner peripheral wall of the shell, a tapered key vsector between two of the first named. sectors serving to wedge ,and maintain all the sectors in assembled position within ,the shell, all of said sectors being formed of abra- 'sive resisting material, a shank on the keystone ifiectnr engaged through an opening in the shell :ito project exteriorly of the shell, there being a -s 1ot in theshank outside of the shell, a wedge driven through said slot, a pair of metal washers tbetweemthegahell and the wedge, a gasket disposed.;b,etween the metal washers,.and a gasket -dlsposed between one of the metal washers and --&he shell.

I 2.;1Ibe -,c,ombina,tion :with ztbe -.=shell .of -a vcentrifugal pump, a curved lining iorethe shell, said ;,linin .having anfinnercurvature and: formed of ;sectors,one:of saidzsectors beinginthe form of a tapered "keystone; serving .to wedge and maintain the remaining sectors inrassembled position within-the shell, andmeans ioresecuringthe keytstone -,sect0r :to the shell.

3..';The structure,as oficlaimzland in which the means for securing the ikeystone :sector to the sshell comprises along:shank-.onithersector ensxesediradially through-the-she1l and having a .-s1 0t formedtherein outsideiohtheishell, awedge in said slot, .apairof metal washersdisposedon the shank underneath thewedge,1a.gasket dis- .posedt between .the washers, and .a -second gasket .dispqsed-hetween the washers .and: the shell.

US489678A 1943-06-04 1943-06-04 Section lined pump shell for dredging Expired - Lifetime US2365058A (en)

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US489678A US2365058A (en) 1943-06-04 1943-06-04 Section lined pump shell for dredging

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Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2635549A (en) * 1947-05-29 1953-04-21 Gorman Rupp Co Centrifugal pump with separable impeller casing
US2759428A (en) * 1952-12-02 1956-08-21 John E Kirby Centrifugal pump
US2975714A (en) * 1954-11-01 1961-03-21 Fmc Corp Screw feed centrifugal pump
US3090319A (en) * 1961-06-30 1963-05-21 Helmick Foundry Machines Compa Pump liner
US3101671A (en) * 1962-02-05 1963-08-27 Allis Chalmers Mfg Co Adjustable seal for pumps
US3318254A (en) * 1965-05-28 1967-05-09 Palmberg Construction Co Centrifugal dredge pump
US3778181A (en) * 1971-03-24 1973-12-11 Gorman Rupp Co Centrifugal pump
US4120605A (en) * 1975-05-09 1978-10-17 Skega Aktiebolag Wear liners for abrasive-material handling equipment
US4566850A (en) * 1979-09-07 1986-01-28 Warman International Limited Pump
DE3513116A1 (en) * 1985-04-12 1986-10-23 Maschf Augsburg Nuernberg Ag Controlled seal on centrifugal pump impellers
US4913619A (en) * 1988-08-08 1990-04-03 Barrett Haentjens & Co. Centrifugal pump having resistant components
WO1994001218A1 (en) * 1992-07-09 1994-01-20 Arde, Inc. Grinding pump
WO1999041530A1 (en) * 1998-02-12 1999-08-19 Envirotech Pumpsystems, Inc. Elastomer seal for adjustable side liners of pumps
US20030206797A1 (en) * 2000-05-19 2003-11-06 Mesiter David L. Centrigugal pump having adjustable clean-out assembly
US20080152476A1 (en) * 2006-12-20 2008-06-26 Ricardo Abarca Melo Pump wet end replacement method and impeller fixing mechanism
US20110164973A1 (en) * 2008-06-13 2011-07-07 Glenn Raymond Smith Pump housing support
CN103758778A (en) * 2014-01-24 2014-04-30 温州市康而达实业有限公司 Horizontal centrifugal pump with adjusting guard plate
US9739285B2 (en) 2013-03-15 2017-08-22 Weir Slurry Group, Inc. Seal for a centrifugal pump
CN107676270A (en) * 2017-11-08 2018-02-09 铜陵市宏达家电有限责任公司 A kind of apron plate backwashes Pulp pump
IT201700024151A1 (en) * 2017-03-03 2018-09-03 Varisco S R L Centrifugal pump and method for adjusting the distance of the wear plate of a centrifugal pump by the impeller
WO2018158617A1 (en) * 2017-03-03 2018-09-07 Varisco S.P.A. Centrifugal pump and method of adjusting the distance of the wear plate from the impeller of a centrifugal pump.

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2635549A (en) * 1947-05-29 1953-04-21 Gorman Rupp Co Centrifugal pump with separable impeller casing
US2759428A (en) * 1952-12-02 1956-08-21 John E Kirby Centrifugal pump
US2975714A (en) * 1954-11-01 1961-03-21 Fmc Corp Screw feed centrifugal pump
US3090319A (en) * 1961-06-30 1963-05-21 Helmick Foundry Machines Compa Pump liner
US3101671A (en) * 1962-02-05 1963-08-27 Allis Chalmers Mfg Co Adjustable seal for pumps
US3318254A (en) * 1965-05-28 1967-05-09 Palmberg Construction Co Centrifugal dredge pump
US3778181A (en) * 1971-03-24 1973-12-11 Gorman Rupp Co Centrifugal pump
US4120605A (en) * 1975-05-09 1978-10-17 Skega Aktiebolag Wear liners for abrasive-material handling equipment
US4566850A (en) * 1979-09-07 1986-01-28 Warman International Limited Pump
DE3513116A1 (en) * 1985-04-12 1986-10-23 Maschf Augsburg Nuernberg Ag Controlled seal on centrifugal pump impellers
US4913619A (en) * 1988-08-08 1990-04-03 Barrett Haentjens & Co. Centrifugal pump having resistant components
WO1994001218A1 (en) * 1992-07-09 1994-01-20 Arde, Inc. Grinding pump
US5302082A (en) * 1992-07-09 1994-04-12 Arde, Inc. Improved efficiency grinding pump for slurry
WO1999041530A1 (en) * 1998-02-12 1999-08-19 Envirotech Pumpsystems, Inc. Elastomer seal for adjustable side liners of pumps
US5941536A (en) * 1998-02-12 1999-08-24 Envirotech Pumpsystems, Inc. Elastomer seal for adjustable side liners of pumps
US20030206797A1 (en) * 2000-05-19 2003-11-06 Mesiter David L. Centrigugal pump having adjustable clean-out assembly
US6887034B2 (en) * 2000-05-19 2005-05-03 The Gorman-Rupp Company Centrifugal pump having adjustable clean-out assembly
US20080152476A1 (en) * 2006-12-20 2008-06-26 Ricardo Abarca Melo Pump wet end replacement method and impeller fixing mechanism
US8100627B2 (en) * 2006-12-20 2012-01-24 Vulco, S.A. Pump wet end replacement method and impeller fixing mechanism
US20110164973A1 (en) * 2008-06-13 2011-07-07 Glenn Raymond Smith Pump housing support
US9759224B2 (en) * 2008-06-13 2017-09-12 Weir Minerals Australia Ltd. Adjustable side liner for a pump
US9593692B2 (en) * 2008-06-13 2017-03-14 Weir Minerals Australia Ltd. Pump housing support
US20140341705A1 (en) * 2008-06-13 2014-11-20 Weir Minerals Australia, Ltd. Adjustable side liner for a pump
US9739285B2 (en) 2013-03-15 2017-08-22 Weir Slurry Group, Inc. Seal for a centrifugal pump
CN103758778A (en) * 2014-01-24 2014-04-30 温州市康而达实业有限公司 Horizontal centrifugal pump with adjusting guard plate
IT201700024151A1 (en) * 2017-03-03 2018-09-03 Varisco S R L Centrifugal pump and method for adjusting the distance of the wear plate of a centrifugal pump by the impeller
WO2018158617A1 (en) * 2017-03-03 2018-09-07 Varisco S.P.A. Centrifugal pump and method of adjusting the distance of the wear plate from the impeller of a centrifugal pump.
CN107676270A (en) * 2017-11-08 2018-02-09 铜陵市宏达家电有限责任公司 A kind of apron plate backwashes Pulp pump

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