WO2013000033A1 - Pompe centrifuge et chemise de volute - Google Patents

Pompe centrifuge et chemise de volute Download PDF

Info

Publication number
WO2013000033A1
WO2013000033A1 PCT/AU2012/000776 AU2012000776W WO2013000033A1 WO 2013000033 A1 WO2013000033 A1 WO 2013000033A1 AU 2012000776 W AU2012000776 W AU 2012000776W WO 2013000033 A1 WO2013000033 A1 WO 2013000033A1
Authority
WO
WIPO (PCT)
Prior art keywords
liner
pump
polyurethane
casings
volute
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.)
Ceased
Application number
PCT/AU2012/000776
Other languages
English (en)
Inventor
Ayyadevara Venkata Subba RAO
Shrinivasan GOVINDAN THANDAVA KRISHNAN
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.)
Weir Minerals Australia Ltd
Weir Minerals India Pvt Ltd
Original Assignee
Weir Minerals Australia Ltd
Weir Minerals India Pvt 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
Priority claimed from AU2011904294A external-priority patent/AU2011904294A0/en
Application filed by Weir Minerals Australia Ltd, Weir Minerals India Pvt Ltd filed Critical Weir Minerals Australia Ltd
Publication of WO2013000033A1 publication Critical patent/WO2013000033A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • F04D29/40—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
    • F04D29/4286—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps inside lining, e.g. rubber

Definitions

  • the present invention relates to wet ends for use in centrifugal pumps and particularly relates to wet end arrangements which utilise a combination of ceramic parts and resilient parts.
  • the pump 10 includes two pump casings 12, 14. Inside these casings 12, 14 is provided a ceramic liner and a ceramic impeller 17.
  • the ceramic liner is comprised of a volute liner 16, a frame plate liner insert 18 provided on the driveshaft side of the pump 10, and a throatbush liner 20 provided on the inlet side of the pump 10.
  • the pump is secured together by way of tightening nuts onto a series of bolts 22 which are provided about the periphery of the pump casing 12 and which cooperate with apertures 24 provided about the periphery of the pump casing 14.
  • Ceramic parts can be quite brittle in nature and it has been found that, when tightening the nuts to secure the pump casings together, cracking of the ceramic liner components can result.
  • a centrifugal pump including: two pump casings; a wear resistant ceramic liner is located between the casings; and wherein at least one region of polyurethane is provided between the outside of the liner and the inside of at least one of the pump casings.
  • the at least one region of polyurethane is provided between the outside of the liner and the inside of both of the pump casings.
  • the at least one region of polyurethane is annular in shape.
  • the liner is comprised of a volute liner, a throatbush liner and a frame plate liner.
  • the volute liner extends between both pump casings to overlie a join between the pump casings.
  • a pump liner component which is formed from a ceramic material and includes at least one region of polyurethane which is bonded to a surface of the ceramic material.
  • the at least one region of polyurethane is annular in shape.
  • the component is one of a volute liner, a throatbush or a frame plate liner.
  • a liner for a centrifugal pump which is comprised of a volute liner, a throatbush and a frame plate liner, all of which are in accordance with the second aspect.
  • a method of forming a pump liner component including the steps of: forming a ceramic part; and over-moulding the ceramic part with at least one region of polyurethane.
  • the pump liner component comprises any of a volute liner, a throatbush or a frame plate liner.
  • a method of retrofitting a centrifugal pump liner including the steps of replacing a component of the existing pump liner with a pump liner component according to the second aspect.
  • Figure 1 is an exploded view of a prior art centrifugal pump arrangement
  • Figure 2 is an exploded view of a centrifugal pump arrangement according to an embodiment of the invention.
  • a pump liner 30 comprising a volute liner 31, a throatbush
  • the volute liner 30 is comprised of a ceramic volute liner 33 which is provided with regions of polyurethane on each side in the form of polyurethane rings 32, 34.
  • the rings 32, 34 When assembled inside a pair of pump casings 12, 14, the rings 32, 34 sit between the outside of the volute liner and the inside faces of the pump casings 12, 14.
  • the polyurethane rings 32, 34 alleviate and distribute compressive load applied to the volute liner 30. This reduces the likelihood that the volute liner will crack whilst the fasteners 22, 24 which are used for holding the pump casings 12, 14 together in the assembled position are tightened.
  • the rings 32, 34 are affixed to the volute liner 33 using an over-moulding technique at the time of manufacturing the volute liner.
  • the ceramic frame plate liner 36 is over-moulded with polyurethane backing 38, and the ceramic throatbush 40 is over-moulded with polyurethane outer ring 42 at the time of manufacture.
  • the ceramic components are produced in a known fashion, such as by slip casting, which does not require detailed explanation as it is a technique known in the art.
  • a polyurethane resin is mixed. Liquid isocyanate and polyolin resin are combined at a specified stoichiometric ratio along with a catalyst, and are mixed together until a homogeneous blend is obtained which is ready for dispensing as a liquid into a mold.
  • Each of the ceramic parts are put into molds with voids defining the shape of the desired polyurethane regions.
  • the resin is dispensed into the voids and is allowed to set at room temperature for a period of time. When the resin has set, the finished parts are demolded.
  • the over-moulding operation is conducted at ambient temperatures, and without the need for high pressures and large amounts of heat energy, as would be the case if attempting to form the resilient portions from a heat-cured elastomer.
  • the costs of the associated molds are greatly reduced as they can be formed of thinner and lighter materials, and require less energy consumption for the production process.
  • each polyurethane region becomes tightly bonded to the previously formed ceramic components. Therefore, the volute liner 31 being a combination of the ceramic liner 33 and the polyurethane rings 32, 34 is shipped as one component. Similarly, the throatbush 41, being a combination of the ceramic throatbush 40 and the polyurethane outer ring 42 is shipped as one component, as is the frame plate liner 37, being a combination of the ceramic frame plate liner 36 and a polyurethane backing 38.
  • the polyurethane regions 36, 32, 34, 42 protect the liner components from shock loads that may be experienced during transit and handling, such as by being knocked or dropped, thereby reducing the risk of the liner components becoming damaged prior to assembly into a pump.
  • the components may feature the polyurethane region bonded thereto, for example the volute liner 30 may have the peripheral rings 32, 34 positioned thereon, but the other liner components may not.
  • the volute liner 30 may have the peripheral rings 32, 34 positioned thereon, but the other liner components may not.
  • the ceramic liner components are cushioned against the inside of the pump casings by regions of polyurethane to reduce risk of breakage when assembling pump and tightening pump casings together.

Landscapes

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

Abstract

L'invention concerne une pompe centrifuge et des composants de chemise pour pompes. La pompe comprend : deux carters, une chemise en céramique résistant à l'usure disposée entre les carters; au moins une région de polyuréthane étant disposée entre l'extérieur de la chemise et l'intérieur d'au moins l'un des carters de pompe.
PCT/AU2012/000776 2011-06-30 2012-07-02 Pompe centrifuge et chemise de volute Ceased WO2013000033A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
IN2238/CHE/2011 2011-06-30
IN2238CH2011 2011-06-30
IN3327CH2011 2011-09-26
IN3327/CHE/2011 2011-09-26
AU2011904294A AU2011904294A0 (en) 2011-10-18 A centrifugal pump and volute liner
AU2011904294 2011-10-18

Publications (1)

Publication Number Publication Date
WO2013000033A1 true WO2013000033A1 (fr) 2013-01-03

Family

ID=47423301

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2012/000776 Ceased WO2013000033A1 (fr) 2011-06-30 2012-07-02 Pompe centrifuge et chemise de volute

Country Status (1)

Country Link
WO (1) WO2013000033A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106337831A (zh) * 2016-10-12 2017-01-18 合肥精创陶瓷设备科技有限公司 一种泵用高技术陶瓷泵体及其制造方法
CN114857031A (zh) * 2021-02-04 2022-08-05 钱江集团温岭正峰动力有限公司 离心泵
WO2022166204A1 (fr) * 2021-02-04 2022-08-11 钱江集团温岭正峰动力有限公司 Pompe centrifuge
CN115163499A (zh) * 2022-05-13 2022-10-11 山东省章丘鼓风机股份有限公司 一种陶瓷护套剖分式泵壳及加工方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1585669A (en) * 1921-04-08 1926-05-25 Hansen Rubber Products Company Pump
US3115099A (en) * 1961-01-09 1963-12-24 Hetherington & Berner Inc Dredge pump construction
US4099890A (en) * 1975-08-21 1978-07-11 Mitsui Mining & Smelting Co., Ltd. Impeller type pump having seal means and protective means
US4974998A (en) * 1989-02-21 1990-12-04 Rolf Heineman Wear-resistant centrifugal solids pump lining
US5513954A (en) * 1994-06-10 1996-05-07 Envirotech Pumpsystems, Inc. Multilayer pump liner
US20090068002A1 (en) * 2003-09-04 2009-03-12 Kevin Edward Burgess Pump housing assembly with liner

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1585669A (en) * 1921-04-08 1926-05-25 Hansen Rubber Products Company Pump
US3115099A (en) * 1961-01-09 1963-12-24 Hetherington & Berner Inc Dredge pump construction
US4099890A (en) * 1975-08-21 1978-07-11 Mitsui Mining & Smelting Co., Ltd. Impeller type pump having seal means and protective means
US4974998A (en) * 1989-02-21 1990-12-04 Rolf Heineman Wear-resistant centrifugal solids pump lining
US5513954A (en) * 1994-06-10 1996-05-07 Envirotech Pumpsystems, Inc. Multilayer pump liner
US20090068002A1 (en) * 2003-09-04 2009-03-12 Kevin Edward Burgess Pump housing assembly with liner

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106337831A (zh) * 2016-10-12 2017-01-18 合肥精创陶瓷设备科技有限公司 一种泵用高技术陶瓷泵体及其制造方法
CN114857031A (zh) * 2021-02-04 2022-08-05 钱江集团温岭正峰动力有限公司 离心泵
WO2022166204A1 (fr) * 2021-02-04 2022-08-11 钱江集团温岭正峰动力有限公司 Pompe centrifuge
CN115163499A (zh) * 2022-05-13 2022-10-11 山东省章丘鼓风机股份有限公司 一种陶瓷护套剖分式泵壳及加工方法

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