GB2114239A - Pressurized oil supply system for centrifugal pump bearings - Google Patents

Pressurized oil supply system for centrifugal pump bearings Download PDF

Info

Publication number
GB2114239A
GB2114239A GB08301739A GB8301739A GB2114239A GB 2114239 A GB2114239 A GB 2114239A GB 08301739 A GB08301739 A GB 08301739A GB 8301739 A GB8301739 A GB 8301739A GB 2114239 A GB2114239 A GB 2114239A
Authority
GB
United Kingdom
Prior art keywords
pump
oil
bearing
oil supply
centrifugal pump
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.)
Withdrawn
Application number
GB08301739A
Other versions
GB8301739D0 (en
Inventor
Klaus Willumeit
Robert Robler
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
Original Assignee
Klein Schanzlin and Becker AG
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 Klein Schanzlin and Becker AG filed Critical Klein Schanzlin and Becker AG
Publication of GB8301739D0 publication Critical patent/GB8301739D0/en
Publication of GB2114239A publication Critical patent/GB2114239A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
    • F01M5/02—Conditioning lubricant for aiding engine starting, e.g. heating
    • F01M5/025—Conditioning lubricant for aiding engine starting, e.g. heating by prelubricating, e.g. using an accumulator
    • 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
    • F16N—LUBRICATING
    • F16N7/00—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated
    • F16N7/38—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated with a separate pump; Central lubrication systems
    • F16N7/40—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated with a separate pump; Central lubrication systems in a closed circulation system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
    • F01M5/02—Conditioning lubricant for aiding engine starting, e.g. heating
    • F01M5/025—Conditioning lubricant for aiding engine starting, e.g. heating by prelubricating, e.g. using an accumulator
    • F01M2005/028—Conditioning lubricant for aiding engine starting, e.g. heating by prelubricating, e.g. using an accumulator with a reservoir under pressure

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Abstract

A central pressurized oil supply system for an axial bearing 4 of a centrifugal pump includes a gear pump 2 which is driven by the centrifugal pump shaft 1. The delivery side of the gear pump 2 is connected via a delivery line with the bearing 4 and an accumulator 5 which is disposed in or on the bearing unit 4 to be lubricated is connected by way of a supply conduit with the delivery line from the output side of the gear pump and a solenoid valve 7 incorporated in this supply conduit is functionally linked with a motor 6 driving the centrifugal pump so that when motor 6 is started, valve 7 is simultaneously opened and oil supplied under pressure to the bearing 4 from the accumulator 5 until the pump has run up to speed when the gear pump 2 is able to supply the bearing 4 and recharge the accumulator with oil under pressure. The system avoids inadequate lubrication of the axial bearing at start-up without the expense associated with a separately driven oil supply system. <IMAGE>

Description

SPECIFICATION Pressurized oil supply system for centrifugal pumps bearings This invention relates to pressurized oil supply systems for bearings of centrifugal pumps. It is known to provide a centrifugal pump with a pressurized oil-lubricated axial bearing. Whilst it would be convenientto have the oil supply system for a such a bearing operated directly by operation ofthe pump itself, e.g.
byutilizing a gear pump driven by the shaft of the centrifugal pump, so as to renderthe lubrication system independent of any "external" oil supply, a problem presented by the design of a pressurized oil supply ofthis kind, which is independent of an external oil supply while the pump is running, is the need to provide adequate lubrication at starting and during possible emergency running, forwherethe oil pressure necessary to supply lubrication oil to the axial bearing is provided by rotation of the centrifugal pump, the oil pressure at such times is non-existent, the gear pump being able to produce the necessary pressure only with effectfrom a particular pump shaft speed.To protectthe axial bearing from the effects of inadequate oil supply during critical phases of operation, the conventional practice is to provide a separate oil supplyfacilitywhich, more particularly in the case of centrifugal pumps having a high system pressure and a correspondingly high axial thrust even at starting, prevents a critical surface pressure arising between the bearing components with consequent increased wearofthe bearing segments.
Since the provision of a separate oil supply facility entails considerable additional expense and space and connecting pipework and consumes energy, it is desirable, if possible, to obviate the need for such a separate oil supply facility.
It is the object of the invention, in one of its aspects, to provide an oil supply system for a centifugal pump, which system can be incorporated in the pump system to be driven directly bythe pump.
According to this aspect ofthe invention, there is provided an oil supply system for a centifugal pump including a gearpumpforsupplying oil, under pressure, to adeliverylinefor con nection with a bearing ofthe centifugal pump, an accumulator being connectedvia a supply conduitwith said delivery line to receive oil under pressurefrom the gear pump.
According to another aspect ofthe invention, there is provided the combination of a centifugal pump and a pressurized oil supply system for a bearing of the pump,the system including a gear pump, arranged to be driven by the shaft of the centifugal pump, for supplying oil, under pressure,toa delivery line connected with said bearing and an accumulator connected via supply conduit with said delivery line to receive oil under pressure from the gear pump.
An embodiment ofthe invention is described below, byway of example with reference to the sole figure of the accompanying drawing which is a diagrammatic representation of a motor-driven centrifugal pump having a pressurized oil supply.
Referring to the drawing, a centrifugal pump has a pumpshaft 1 with an axial bearing4. (The remainder ofthe pump proper is not shown) A pressurized oil supply is provided by means of a gear pump 2 which is driven by pump shaft 1 and which is associated with a relief valve 3. When the pump is operating, the pressurized oil, drawn from an oil tank8 by the gear pump 2, is delivered under pressure by the gear pump to a delivery line via which the oil passes to axial bearing 4, via the valve 3 which is disposed in the delivery line. An accumulator5 is connected with the delivery line by a supply conduit in which is disposed anelectricallyoperablevalve7, preferably a solenoid valve.
A motor 6which drives the centrifugal pump can be started only if the oil pressure of the accumulator5 is at or above a necessary minimum value. This condition is met by means of a pressure controlled switch (not shown) subjected to the oil pressure ofthe accumulator 5, and controlling energisation of motor 6.
Solenoid valve 7 disposed in the supply conduit between the accumulator 5 and the delivery conduit which leads to the axial bearing 4 is so interlocked with the motor 6, (e.g. by sharing a common energisation circuit), as to be open when the motor 6 is energized and closed when the motor6 is de-energised. The oil tank8, which has a cooler 9, is disposed downstream ofthe axial bearing 4..
When the motor 6 is started to start the centrifugal pump the solenoid valve 7 is opened at the same time so that oil is supplied immediately to the axial bearing 4, even beforethe centrifugal pump has attained its running speed. When the centrifugal pump has reached its running speed, and the gear pump has consequently reached an efficient operating speed, the gear pump is able to supplythe bearing 4 and replenish the accumulator 5 at a pressure above said predetermined minimum so that when the motor 6 is stopped, and the valve 7 simultaneously closed, the accumulator has been charged readyforthe next start-up ofthe pump.
1. An oil supply system for a centrifugal pump including a gear pump for supplying oil, under pressure, to a delivery lineforconnection with a bearing ofthe centrifugal pump, an accumulator being connectedvia a supplyconduitwith said delivery line to receive oil under pressure from the gear pump.
2. An oil supply system according to claim 1 wherein a valve is disposed in said supply conduit whereby the accumulator can be sealed off from said delivery line.
3. The combination of a centrifugal pump and a pressurized oil supply system for a bearing of the pump, the system including a gear pump, arranged to be driven by the shaft of the centrifugal pump, for supplying oil, under pressure, to a delivery line connected with said bearing and an accumulator connected via a supply conduit with said delivery line to receive oil under pressure from the gear pump.
4. A combination according to claim 3 wherein at least the accomulator is disposed in or on the bearing unitto be lubricated.
5. A combination according to claim 3 ar claim 4, including means arranged to inhibitstarting ofthe
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (11)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Pressurized oil supply system for centrifugal pumps bearings This invention relates to pressurized oil supply systems for bearings of centrifugal pumps. It is known to provide a centrifugal pump with a pressurized oil-lubricated axial bearing. Whilst it would be convenientto have the oil supply system for a such a bearing operated directly by operation ofthe pump itself, e.g. byutilizing a gear pump driven by the shaft of the centrifugal pump, so as to renderthe lubrication system independent of any "external" oil supply, a problem presented by the design of a pressurized oil supply ofthis kind, which is independent of an external oil supply while the pump is running, is the need to provide adequate lubrication at starting and during possible emergency running, forwherethe oil pressure necessary to supply lubrication oil to the axial bearing is provided by rotation of the centrifugal pump, the oil pressure at such times is non-existent, the gear pump being able to produce the necessary pressure only with effectfrom a particular pump shaft speed.To protectthe axial bearing from the effects of inadequate oil supply during critical phases of operation, the conventional practice is to provide a separate oil supplyfacilitywhich, more particularly in the case of centrifugal pumps having a high system pressure and a correspondingly high axial thrust even at starting, prevents a critical surface pressure arising between the bearing components with consequent increased wearofthe bearing segments. Since the provision of a separate oil supply facility entails considerable additional expense and space and connecting pipework and consumes energy, it is desirable, if possible, to obviate the need for such a separate oil supply facility. It is the object of the invention, in one of its aspects, to provide an oil supply system for a centifugal pump, which system can be incorporated in the pump system to be driven directly bythe pump. According to this aspect ofthe invention, there is provided an oil supply system for a centifugal pump including a gearpumpforsupplying oil, under pressure, to adeliverylinefor con nection with a bearing ofthe centifugal pump, an accumulator being connectedvia a supply conduitwith said delivery line to receive oil under pressurefrom the gear pump. According to another aspect ofthe invention, there is provided the combination of a centifugal pump and a pressurized oil supply system for a bearing of the pump,the system including a gear pump, arranged to be driven by the shaft of the centifugal pump, for supplying oil, under pressure,toa delivery line connected with said bearing and an accumulator connected via supply conduit with said delivery line to receive oil under pressure from the gear pump. An embodiment ofthe invention is described below, byway of example with reference to the sole figure of the accompanying drawing which is a diagrammatic representation of a motor-driven centrifugal pump having a pressurized oil supply. Referring to the drawing, a centrifugal pump has a pumpshaft 1 with an axial bearing4. (The remainder ofthe pump proper is not shown) A pressurized oil supply is provided by means of a gear pump 2 which is driven by pump shaft 1 and which is associated with a relief valve 3. When the pump is operating, the pressurized oil, drawn from an oil tank8 by the gear pump 2, is delivered under pressure by the gear pump to a delivery line via which the oil passes to axial bearing 4, via the valve 3 which is disposed in the delivery line. An accumulator5 is connected with the delivery line by a supply conduit in which is disposed anelectricallyoperablevalve7, preferably a solenoid valve. A motor 6which drives the centrifugal pump can be started only if the oil pressure of the accumulator5 is at or above a necessary minimum value. This condition is met by means of a pressure controlled switch (not shown) subjected to the oil pressure ofthe accumulator 5, and controlling energisation of motor 6. Solenoid valve 7 disposed in the supply conduit between the accumulator 5 and the delivery conduit which leads to the axial bearing 4 is so interlocked with the motor 6, (e.g. by sharing a common energisation circuit), as to be open when the motor 6 is energized and closed when the motor6 is de-energised. The oil tank8, which has a cooler 9, is disposed downstream ofthe axial bearing 4.. When the motor 6 is started to start the centrifugal pump the solenoid valve 7 is opened at the same time so that oil is supplied immediately to the axial bearing 4, even beforethe centrifugal pump has attained its running speed. When the centrifugal pump has reached its running speed, and the gear pump has consequently reached an efficient operating speed, the gear pump is able to supplythe bearing 4 and replenish the accumulator 5 at a pressure above said predetermined minimum so that when the motor 6 is stopped, and the valve 7 simultaneously closed, the accumulator has been charged readyforthe next start-up ofthe pump. CLAIMS
1. An oil supply system for a centrifugal pump including a gear pump for supplying oil, under pressure, to a delivery lineforconnection with a bearing ofthe centrifugal pump, an accumulator being connectedvia a supplyconduitwith said delivery line to receive oil under pressure from the gear pump.
2. An oil supply system according to claim 1 wherein a valve is disposed in said supply conduit whereby the accumulator can be sealed off from said delivery line.
3. The combination of a centrifugal pump and a pressurized oil supply system for a bearing of the pump, the system including a gear pump, arranged to be driven by the shaft of the centrifugal pump, for supplying oil, under pressure, to a delivery line connected with said bearing and an accumulator connected via a supply conduit with said delivery line to receive oil under pressure from the gear pump.
4. A combination according to claim 3 wherein at least the accomulator is disposed in or on the bearing unitto be lubricated.
5. A combination according to claim 3 ar claim 4, including means arranged to inhibitstarting ofthe centrifugal pump if the oil pressure in the accumulator is below a predetermined value.
6. A combination according to any of claims 3 to 5, wherein a valve is disposed in said supply conduit connecting the accumulator with said delivery line and is arranged to be opened when the centrifugal pump is started and to be closed when the centrifugal pump is stopped.
7. Acombination according to claim 6 including an electric motorfor driving the pump, and wherein said valve in said supply conduit connecting the accumulatorwith said delivery line is a solenoid valve which is arranged to be open with the motor energised and closed with the motor de-energised.
8. Acombination according to anyofclaims3to 7 wherein said bearing is an axial bearing of the centrifugal pump.
9. An oil supply system for a centrifugal pump, substantially as hereinbefore described with referenceto,and as shown in,the accompanying drawings.
10. The combination of a centrifugal pump and a pressurized oil supply system therefor, substantially as hereinbefore described with reference to, and as shown in, the accompanying drawing.
11. Any novel feature or combination offeatures disclosed herein.
GB08301739A 1982-02-03 1983-01-21 Pressurized oil supply system for centrifugal pump bearings Withdrawn GB2114239A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3203642A DE3203642C2 (en) 1982-02-03 1982-02-03 Central press oil supply for axial bearings of centrifugal pumps

Publications (2)

Publication Number Publication Date
GB8301739D0 GB8301739D0 (en) 1983-02-23
GB2114239A true GB2114239A (en) 1983-08-17

Family

ID=6154689

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08301739A Withdrawn GB2114239A (en) 1982-02-03 1983-01-21 Pressurized oil supply system for centrifugal pump bearings

Country Status (4)

Country Link
DE (1) DE3203642C2 (en)
FR (1) FR2520815A1 (en)
GB (1) GB2114239A (en)
IT (1) IT1163048B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2579718A1 (en) * 1985-04-02 1986-10-03 Klein Schanzlin & Becker Ag OIL SUPPLY DEVICE FOR SHAFT BEARINGS

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107701261B (en) * 2017-11-14 2020-07-10 江苏豪赛科技股份有限公司 Novel engine pre-lubrication system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL251171A (en) * 1959-06-03 1900-01-01
GB917285A (en) * 1959-12-30 1963-01-30 Prvni Brnenska Strojirna Zd Y Improvements in apparatus for securing oil feed into the lubricating system of turbomachines
DE1183309B (en) * 1960-12-08 1964-12-10 Eberspaecher J Device for prelubricating the bearings of an exhaust gas turbocharger
GB1360489A (en) * 1971-06-03 1974-07-17 Weir Pumps Ltd Sealed lubricating system module
US4171611A (en) * 1975-08-07 1979-10-23 Motoren- Und Turbinen-Union Munchen Gmbh Vehicular gas turbine system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2579718A1 (en) * 1985-04-02 1986-10-03 Klein Schanzlin & Becker Ag OIL SUPPLY DEVICE FOR SHAFT BEARINGS

Also Published As

Publication number Publication date
FR2520815A1 (en) 1983-08-05
DE3203642C2 (en) 1983-12-29
IT1163048B (en) 1987-04-08
GB8301739D0 (en) 1983-02-23
IT8319294A0 (en) 1983-01-27
DE3203642A1 (en) 1983-08-18

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)