WO2017112976A1 - Élément de protection pour pompe rotative - Google Patents

Élément de protection pour pompe rotative Download PDF

Info

Publication number
WO2017112976A1
WO2017112976A1 PCT/AU2016/051248 AU2016051248W WO2017112976A1 WO 2017112976 A1 WO2017112976 A1 WO 2017112976A1 AU 2016051248 W AU2016051248 W AU 2016051248W WO 2017112976 A1 WO2017112976 A1 WO 2017112976A1
Authority
WO
WIPO (PCT)
Prior art keywords
guard
bearing housing
pump
gland follower
driveshaft
Prior art date
Application number
PCT/AU2016/051248
Other languages
English (en)
Inventor
Cesar Calma
Original Assignee
Weir Minerals Australia 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 AU2015905411A external-priority patent/AU2015905411A0/en
Application filed by Weir Minerals Australia Ltd filed Critical Weir Minerals Australia Ltd
Publication of WO2017112976A1 publication Critical patent/WO2017112976A1/fr

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
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • 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
    • F04D29/10—Shaft sealings
    • F04D29/106—Shaft sealings especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/84—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor
    • F16D3/843—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor enclosed covers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
    • F16P1/00—Safety devices independent of the control and operation of any machine
    • F16P1/02—Fixed screens or hoods

Definitions

  • This invention relates to guards used with machines to prevent injury to operators of the machinery.
  • the invention has particular application to rotary pumps.
  • Rotary pumps typically comprise a bearing housing and an impeller housing, with a driveshaft extending between the bearing housing and the impeller housing.
  • An adjustable gland seal is provided at the region where the driveshaft enters the impeller housing.
  • the function of the gland seal is to resist escape of pumping medium, such as a slurry or liquid, from the pump whilst allowing for rotation of the driveshaft which supports and drives an impeller located inside the impeller housing.
  • the gland seal is often provided with its own pressurised water supply and some amount of leakage of water or other fluid is normal during operation of the pump.
  • the gland seal typically includes some type of packing material which becomes compacted or worn over time. This necessitates regular inspection of the rate of leakage from the gland seal and the making of regular adjustments of the degree of compression applied to the packing material which is typically effected by progressive manual tightening of nuts or bolts which hold a gland follower in compressed relation to the packing material.
  • a guard for a rotary pump having a bearing housing and further including an impeller housing, and a driveshaft extending between the bearing housing of the pump and the impeller housing; the pump further including an adjustable sealing arrangement including a gland follower which is provided at a region where the driveshaft enters the impeller housing, the guard including: a bearing housing portion; and
  • the bearing housing portion includes an upper guard portion and a lower guard portion, the upper guard portion is arranged to be affixed to the bearing housing and retains the lower guard portion in place in association with the bearing housing;
  • the gland follower portion is arranged to be attached to the gland follower, the gland follower portion cooperates with the bearing housing portion to accommodate changes in the adjustment of the gland follower;
  • the guard allows access to adjust the sealing arrangement but obstructs access to the driveshaft.
  • the gland follower portion encircles and at least partially overlaps the bearing housing portion.
  • the lower guard portion hangs from the upper guard portion.
  • the upper guard portion is substantially C-shaped and the lower guard portion hangs from free ends of the C-shape.
  • the C-shape of the upper guard portion describes an arc of approximately 270 degrees.
  • the upper guard portion and lower guard portion include interengaging lips which prevent movement of the lower guard portion away from the bearing housing when installed on a pump.
  • the gland follower portion is formed by at least two sections.
  • At least two sections of the gland follower portion are joined by a hinge.
  • the guard includes apertures to allow visual inspection of the driveshaft.
  • a rotary pump including a guard according to the first aspect.
  • a method of retrofitting a guard to a rotary pump including the steps of providing a guard according to the first aspect, and installing the guard on the pump.
  • Figure 1 is a perspective view of a guard in accordance with the present disclosure
  • Figure 2 is an exploded view of the first sub-assembly of the guard of Figure 1;
  • Figure 3 is a perspective view of the first sub-assembly of the guard of Figure 1;
  • Figure 4 shows the second sub-assembly of the guard of Figure 1 in the open configuration
  • Figure 5 shows the guard of Figure 1 installed on a rotary pump
  • Figure 6 shows the gland follower of the pump of Figure 5 being adjusted with the guard in place.
  • the guard 10 includes a bearing housing portion in the form of a first sub-assembly 20.
  • the first subassembly 20 is comprised of an upper guard portion in the form of upper guard member 22, shaped from an arcuate strip of material, and a lower guard portion in the form of lower guard member 24 also shaped from an arcuate strip of material, which interfits in use with the upper guard member 22 to form a complete ring-shaped member.
  • the first sub-assembly 20 is arranged to be affixed to the bearing housing of the pump using preexisting screws or bolts fitted by way of two apertures 26.
  • the guard 10 further includes a gland follower portion in the form of a second sub-assembly 30.
  • the second sub-assembly 30 is comprised of two semi-circular strip sections of material 32, 34 which are joined by a hinge 35 located centrally therebetween.
  • the second sub-assembly is arranged to be affixed to the gland follower of the pump using pre-existing screws or bolts fitted by way of two apertures 36.
  • the sub-assembly 20 is provided in two parts, the upper guard member 22 and the lower guard member 24 to allow the sub-assembly 20 to be installed about the driveshaft of a rotary pump.
  • the lower guard member 24 is supported in place temporarily by hand beneath the driveshaft.
  • the upper guard member 22 is then put in place in from above the driveshaft, and in a movement represented by dotted arrow D, the two parts 22, 24 are joined together in an interfitting manner as shown in Figure 3.
  • Bolts are then inserted through respective apertures 26 into pre-existing threaded holes provided in the bearing housing of the pump to maintain the first sub assembly 20 in place.
  • the upper guard member is somewhat C-shaped insofar as it describes an arc of greater than 180 degrees. In the embodiment shown the upper guard member describes an arc of approximately 270 degrees. The result of this arrangement is that the upper guard member partially encircles the lower guard member so that the lower guard member hangs from the upper guard member. The distance between the free ends of the C-shaped profile must be sufficient to enable the free ends to accommodate the shaft of the pump during installation of the guard. When installed, the lower guard member 24 hangs below the upper guard member 22 by interfitting engagement at the regions labelled A and B.
  • the outwardly projecting lip 28 provided on the lower guard member 24 interengages with the inwardly projecting lip 27 provided on the upper guard member 22 by becoming trapped behind the lip 27, to prevent the lower guard member 24 from moving outwardly from the bearing housing.
  • the lower guard member 24 is held in place by the upper guard member 22 without the need for additional fasteners.
  • the two bolts holding the upper guard member 22 serve to maintain the entire sub-assembly in place.
  • the second sub-assembly 30 is shown in isolation and in the open position with the two semi-circular strip sections 34, 32 swung away from each other about the hinge 35.
  • To install the second sub-assembly it is opened to the configuration shown in Figure 4 and then brought about the driveshaft of the pump.
  • the sub-assembly is then closed by rotating the two sections towards one another, about the hinge 35.
  • the catch 37 frictionally engages with the free end of section 32.
  • Pre-existing bolts are then inserted through the two apertures 36 and into pre-existing threaded holes provided in the gland follower, so as to affix the second sub-assembly to the gland follower of the pump.
  • This guard 10 is now complete as shown in Figure 1, installed on a pump with the second sub-assembly 30 encircling and overlapping the first subassembly 20.
  • the second sub-assembly 30 encloses the upper and lower guard members 22, 24 and slides over the upper and lower guard members 22, 24 during gland adjustment.
  • the guard 10 is shown installed on a pump 1.
  • the first sub-assembly 20 is affixed to the bearing housing 2 and the second sub-assembly 30 is affixed to the gland follower 4. Over time, the gland follower 4 must be adjusted to maintain the correct pressure on the packing inside the gland seal.
  • gland follower adjustment nuts 5 are tightened by the same amount of rotation to maintain the gland follower in a parallel relationship to the gland packing.
  • the gland follower adjustment nut 5 is shown being tightened by use of a hand held spanner 6.
  • the guard 10 provides access to adjust the gland follower 4 of the adjustable sealing arrangement, but obstructs access to the driveshaft to prevent injury to maintenance operators. Over time, progressive tightening operations on the gland follower adjustment nuts 5 take place as the gland packing in the gland seal wears away.
  • the guard 10 also provides protection of the bearing seals from ingress as a secondary function on .
  • the operation of repacking the gland seal is carried out when the pump has been shut down and the drive shaft is not rotating.
  • the guard 10 may be removed to carry out the operation of repacking the gland seal and is replaced afterwards.
  • Components of the guard 10 are formed from stainless steel but could also be formed from plain carbon steel which may be painted to inhibit corrosion. Inspection apertures are provided in the first and second sub-assemblies
  • the guard provides access to adjust the gland follower of the adjustable sealing arrangement but obstructs access to the driveshaft to prevent injury to maintenance operators
  • the upper portion of the bearing housing portion is C-shaped to partially encircle and support the lower portion.
  • the upper portion and lower portion include interengaging lips which prevent movement of the lower guard portion away from the bearing housing when installed. The lower portion is thereby retained in place without the use of any fasteners in the lower portion.
  • the upper portion of the bearing housing portion is held in place by utilising pre-existing fasteners provided on the pump thus allowing for retrofitting of guards to existing pumps.
  • the second assembly provides ease of assembly with a snap closed design requiring no addition fasteners
  • guard provides protection of the bearing seals from ingress as a secondary function
  • specific terminology has been resorted to for the sake of clarity. However, the invention is not intended to be limited to the specific terms so selected, and it is to be understood that each specific term includes all technical equivalents which operate in a similar manner to accomplish a similar technical purpose. Terms such as “front” and “rear”, “inner” and “outer”, “above”, “below”, “upper” and “lower” and the like are used as words of convenience to provide reference points and are not to be construed as limiting terms.

Landscapes

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

Abstract

L'invention concerne un élément de protection pour une pompe rotative, la pompe comportant un logement de roulement et comprenant en outre un logement de roue à aubes, et un arbre d'entraînement s'étendant entre le logement de roulement de la pompe et le logement de roue à aubes ; la pompe comprenant en outre un agencement réglable formant étanchéité et comportant un fouloir disposé au niveau d'une région où l'arbre d'entraînement entre dans le logement de roue à aubes, l'élément de protection comprenant : une partie de logement de roulement ; et une partie de fouloir ; la partie de logement de roulement comprenant une partie de protection supérieure et une partie de protection inférieure, la partie de protection supérieure étant conçue pour être fixé au logement de roulement et retenant la partie de protection inférieure en place en association avec le logement de roulement ; la partie de fouloir étant conçue pour être fixée au fouloir, la partie de fouloir coopérant avec la partie de logement de roulement afin de s'adapter aux variations de réglage du fouloir ; l'élément de protection permettant l'accès afin de régler l'agencement formant étanchéité mais empêchant l'accès à l'arbre d'entraînement.
PCT/AU2016/051248 2015-12-30 2016-12-16 Élément de protection pour pompe rotative WO2017112976A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2015905411 2015-12-30
AU2015905411A AU2015905411A0 (en) 2015-12-30 A Guard for a Rotary Pump

Publications (1)

Publication Number Publication Date
WO2017112976A1 true WO2017112976A1 (fr) 2017-07-06

Family

ID=59224061

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2016/051248 WO2017112976A1 (fr) 2015-12-30 2016-12-16 Élément de protection pour pompe rotative

Country Status (1)

Country Link
WO (1) WO2017112976A1 (fr)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6190261B1 (en) * 1998-09-15 2001-02-20 Flowserve Management Company Pump assembly shaft guard
AU2008101032A4 (en) * 2008-10-22 2008-11-20 Alcoa Of Australia Limited Shaft Guard
US7520816B1 (en) * 2005-09-21 2009-04-21 Tencarva Machinery Company Guard assembly for extending around a rotating shaft
AU2008207607A1 (en) * 2007-12-21 2009-07-09 Weir Minerals Australia Ltd A guard
US8025577B2 (en) * 2008-04-16 2011-09-27 Labarge Iii William E Coupling guard
US20110287847A1 (en) * 2010-05-18 2011-11-24 Allan Bare Safety Guard for Wide Angle PTO Joint
US20140256457A1 (en) * 2013-03-11 2014-09-11 Ebara Corporation Shaft coupling guard and rotatable apparatus system
US20140311283A1 (en) * 2013-04-17 2014-10-23 William Cocks Guard System for Pump Assembly
US20140369817A1 (en) * 2011-12-19 2014-12-18 Weir Minerals Australia Ltd Guard for a rotary pump
CN204572539U (zh) * 2015-04-29 2015-08-19 中国石油天然气股份有限公司 离心泵联轴器全封闭式保护罩

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6190261B1 (en) * 1998-09-15 2001-02-20 Flowserve Management Company Pump assembly shaft guard
US7520816B1 (en) * 2005-09-21 2009-04-21 Tencarva Machinery Company Guard assembly for extending around a rotating shaft
AU2008207607A1 (en) * 2007-12-21 2009-07-09 Weir Minerals Australia Ltd A guard
US8025577B2 (en) * 2008-04-16 2011-09-27 Labarge Iii William E Coupling guard
AU2008101032A4 (en) * 2008-10-22 2008-11-20 Alcoa Of Australia Limited Shaft Guard
US20110287847A1 (en) * 2010-05-18 2011-11-24 Allan Bare Safety Guard for Wide Angle PTO Joint
US20140369817A1 (en) * 2011-12-19 2014-12-18 Weir Minerals Australia Ltd Guard for a rotary pump
US20140256457A1 (en) * 2013-03-11 2014-09-11 Ebara Corporation Shaft coupling guard and rotatable apparatus system
US20140311283A1 (en) * 2013-04-17 2014-10-23 William Cocks Guard System for Pump Assembly
CN204572539U (zh) * 2015-04-29 2015-08-19 中国石油天然气股份有限公司 离心泵联轴器全封闭式保护罩

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