US3794440A - Liquid dispensing devices - Google Patents

Liquid dispensing devices Download PDF

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Publication number
US3794440A
US3794440A US00250362A US3794440DA US3794440A US 3794440 A US3794440 A US 3794440A US 00250362 A US00250362 A US 00250362A US 3794440D A US3794440D A US 3794440DA US 3794440 A US3794440 A US 3794440A
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United States
Prior art keywords
housing
pump
supply system
liquid
liquid supply
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Expired - Lifetime
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US00250362A
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Murtry D Mc
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Rolls Royce PLC
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Rolls Royce PLC
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H3/00—Propeller-blade pitch changing
    • B63H3/06—Propeller-blade pitch changing characterised by use of non-mechanical actuating means, e.g. electrical
    • B63H3/08—Propeller-blade pitch changing characterised by use of non-mechanical actuating means, e.g. electrical fluid
    • 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
    • F16N13/00—Lubricating-pumps

Definitions

  • a liquid supply system comprising a rotatable housing for attachment to a variable pitch fan or propeller and to rotate therewith.
  • the housing contains a pitch control mechanism for the fan, and a quantity of lubricating oil sealed therein.
  • the system includes a pump for dispensing the oil to the pitch control mechanism.
  • the pump is connected to the periphery of the housing so as to receive at its inlet, during rotation of the housing, oil under centrifugal pressure and to dispense the oil radially inwardly to a'point within the housing.
  • a liquid supply system comprising a rotatable housing, means for rotating the housing, a pump arrangement including a pump, means connecting the pump to the housing, the pump connected on or within the housing so as to receive under centrifugal pressure a liquid contained in the housing when the housing is rotated and to dispense the liquid to a point within the housing.
  • the liquid supply system comprises a pump connected to the outer periphery of the rotatable housing.
  • the outer periphery of the housing diametrically opposite the pump is locally radially enlarged so that during rotation of the housing centrifugal forces on the enlargement and the liquid it contains counter-balances the pump arrangement.
  • An envisioned application of a liquid supply system according to the invention is as forming part of a control system for a variable pitch fan or propeller.
  • the control system which is completely self-contained can be connected to the fan or propeller rotor to rotate therewith as a single unit.
  • the control system comprises a housing, a pump fitted on or within the housing, the housing containing a pitch-change mechanism and a governor for controlling the fan, and a quantity of oil for lubricating of the parts.
  • the containment within the control system of the lubricating oil has the advantage over other rotatable control systems where the oil is supplied from a non-rotating external source in that the attendant sealing problems in the flow connection between the rotating control system and thenonrotating external source is dispensed with.
  • a pump arrangement comprises an oil pump 11 which is attached by bolted and flanged connections 9 to the outer periphery of a rotatable housing 12.
  • the rotatable housing 12 is provided with a radially extending flange 13 to facilitate a bolted connection to the hub of a variable pitch fan or propeller (not shown) and to rotate therewith when the fan is rotated by a first drive (not shown), the axis of rotation of the housing and the fan being in co-axial relationship.
  • Said bolted connection forms a substantially oil-tight seal.
  • the housing 12 is partially filled with oil to approximately one-third of its volume.
  • the pump 11 is provided with an inlet 14 open to the interior of the housing and an outlet 15 connected toa pipe 16 through which oil is supplied from the pump 11 to the fan pitch-change mechanism 17 (shown in diagrammatic form) and to an epicyclic bevel gear train 18.
  • the epicyclic bevel gear train 18 comprises a bevel gear 21 supported from and rotated by a second drive 20 (shown in diagrammatic form) so as to rotate the bevel gear 22 which is supported from a bearing housing 23 by ball bearings 24.
  • the gear 22 is connected to a shaft 25 which drives the pump 11, the shaft rotating in a steady bearing 26 mounted in a housing 27.
  • a third bevel gear 28 meshes with the gear 22 and is connected to the pitch-change mechanism 17.
  • the bearing housings 23 and 27 rotate with the housing 12 and together with the pitch-change mechanism are mounted from the housing 12.
  • the pump In operation when the housing 12 is rotated the oil is centrifuged radially outwardly to collect in the radially outer portion of the housing.
  • the pump receives a continuous supply of oil under centrifugal pressure through the inlet 14 and pumps the oil through the outlet 15 and the pipe 16 towards the rotational centre of the housing.
  • the outer periphery of the housing diametrically opposite the pump is locally radially enlarged to form a pocket 31. During rotation of the housing the pocket 31 and the oil it contains centrifugally counterbalances the pump.
  • a liquid supply system comprising a rotatable housing having a circumferential wall, means for rotating the housing, a pump arrangement including a pump, means connecting the pump to the circumferential wall of the housing, the pump connected to the housing so as to receive under centrifugal pressure a liquid contained in the housing, when the housing is rotated, and said pump means having means to dispense the liquid to a point within the housing, the periphery of the housing diametrically opposite the pump being locally radially enlarged so that during rotation of the housing the centrifugal forces acting on the enlargement and the liquid it contains substantially centrifugally counter-balances the centrifugal forces acting on the pump arrangement.
  • a liquid supply system as claimed in claim 7 in which said mounting means connects the pump to the outer periphery of the rotatable housing.
  • a liquid supply system as claimed in claim 7 in which said means for driving the pump comprises a rotary drive, at least one shaft and gear means connecting said rotary drive and said pump.
  • a liquid supply system as claimed in claim 8 in which the periphery of the housing diametricallly opposite the pump is locally radially enlarged so that during rotation of the housing the centrifugal forces acting on the enlargement and the liquid it contains substantially centrifugally counter-balances the centrifugal forces acting on the pump arrangement.
  • a liquid supply system comprising an annular rotatable housing, means for rotating the housing, a pump arrangement including a pump, means for driving the pump and means for mounting the pump on the annular housing so as to rotate therewith, the pump having an inlet communicating with the interior of the housing so as to receive under centrifugal pressure a liquid contained in the housing when the housing is rotated, the
  • conduit means for providing a centrifugal force on the housing which connected to the pump and rotatable therewith for dispensing liquid from the pump to a point within the housing.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Rotary Pumps (AREA)

Abstract

A liquid supply system comprising a rotatable housing for attachment to a variable pitch fan or propeller and to rotate therewith. The housing contains a pitch-control mechanism for the fan, and a quantity of lubricating oil sealed therein. The system includes a pump for dispensing the oil to the pitch control mechanism. The pump is connected to the periphery of the housing so as to receive at its inlet, during rotation of the housing, oil under centrifugal pressure and to dispense the oil radially inwardly to a point within the housing.

Description

United States Patent [151 McMurtry LIQUID DISPENSING DEVICES [75] Inventor: David Roberts McMurtry, Bristol,
England [73] Assignee: Rolls-Royce Limited, London,
England 221 Filed: May 4, 1972 21 Appl. No.: 250,362
[30] Foreign Application Priority Data May 15, 1971 Great Britain 15183/71 [52] US. Cl 415/88, 184/628, 415/143, 416/157 [51] Int. Cl.. F0lm 11/00, F04d 13/14, F04d 13/16 [58] Field of Search 415/89, 143, 88; 417/205; 184/628; 416/157 [56] References Cited UNITED STATES PATENTS 3,318,644 5/1967 Johnson ..415/89 Feb. 26, 1974 8/1956 Kugel et al 415/89 11/1954 Gaubatz et al 415/89 Primary Examiner-Henry F. Raduazo Attorney, Agent, or Firm-Stevens, Davis, Miller &
Mosher [5 7 ABSTRACT A liquid supply system comprising a rotatable housing for attachment to a variable pitch fan or propeller and to rotate therewith. The housing contains a pitch control mechanism for the fan, and a quantity of lubricating oil sealed therein. The system includes a pump for dispensing the oil to the pitch control mechanism.
The pump is connected to the periphery of the housing so as to receive at its inlet, during rotation of the housing, oil under centrifugal pressure and to dispense the oil radially inwardly to a'point within the housing.
8 Claims, 1 Drawing Figure 1 LIQUID DISPENSING DEVICES The present invention relates to a liquid supply systern.
According to the present invention there is provided a liquid supply system comprising a rotatable housing, means for rotating the housing, a pump arrangement including a pump, means connecting the pump to the housing, the pump connected on or within the housing so as to receive under centrifugal pressure a liquid contained in the housing when the housing is rotated and to dispense the liquid to a point within the housing.
In a preferred embodiment of the invention the liquid supply system comprises a pump connected to the outer periphery of the rotatable housing.
In a further preferred embodiment of the invention the outer periphery of the housing diametrically opposite the pump is locally radially enlarged so that during rotation of the housing centrifugal forces on the enlargement and the liquid it contains counter-balances the pump arrangement.
An envisioned application of a liquid supply system according to the invention is as forming part of a control system for a variable pitch fan or propeller. The control system which is completely self-contained can be connected to the fan or propeller rotor to rotate therewith as a single unit. The control system comprises a housing, a pump fitted on or within the housing, the housing containing a pitch-change mechanism and a governor for controlling the fan, and a quantity of oil for lubricating of the parts. The containment within the control system of the lubricating oil has the advantage over other rotatable control systems where the oil is supplied from a non-rotating external source in that the attendant sealing problems in the flow connection between the rotating control system and thenonrotating external source is dispensed with. However during rotation ofa self-contained unit the oil is centrifuged radially outwardly and a pump attempting to suck oil into its inlet against a centrifugal pressure greater than 14.7 lbs/in on the oil would produce cavitation in the oil supply thus preventing an uninterrupted supply of oil by the pump. The present invention overcomes this problem.
An embodiment of a liquid supply system according to the invention will now be described, by way of example only, with reference to the accompanying drawing which shows in part section:
A pump arrangement comprises an oil pump 11 which is attached by bolted and flanged connections 9 to the outer periphery of a rotatable housing 12. The rotatable housing 12 is provided with a radially extending flange 13 to facilitate a bolted connection to the hub of a variable pitch fan or propeller (not shown) and to rotate therewith when the fan is rotated by a first drive (not shown), the axis of rotation of the housing and the fan being in co-axial relationship. Said bolted connection forms a substantially oil-tight seal. The housing 12 is partially filled with oil to approximately one-third of its volume.
The pump 11 is provided with an inlet 14 open to the interior of the housing and an outlet 15 connected toa pipe 16 through which oil is supplied from the pump 11 to the fan pitch-change mechanism 17 (shown in diagrammatic form) and to an epicyclic bevel gear train 18.
The epicyclic bevel gear train 18 comprises a bevel gear 21 supported from and rotated by a second drive 20 (shown in diagrammatic form) so as to rotate the bevel gear 22 which is supported from a bearing housing 23 by ball bearings 24. The gear 22 is connected to a shaft 25 which drives the pump 11, the shaft rotating in a steady bearing 26 mounted in a housing 27. A third bevel gear 28 meshes with the gear 22 and is connected to the pitch-change mechanism 17.
The bearing housings 23 and 27 rotate with the housing 12 and together with the pitch-change mechanism are mounted from the housing 12.
In operation when the housing 12 is rotated the oil is centrifuged radially outwardly to collect in the radially outer portion of the housing. Thus the pump receives a continuous supply of oil under centrifugal pressure through the inlet 14 and pumps the oil through the outlet 15 and the pipe 16 towards the rotational centre of the housing.
The outer periphery of the housing diametrically opposite the pump is locally radially enlarged to form a pocket 31. During rotation of the housing the pocket 31 and the oil it contains centrifugally counterbalances the pump.
I claim:
1. A liquid supply system comprising a rotatable housing having a circumferential wall, means for rotating the housing, a pump arrangement including a pump, means connecting the pump to the circumferential wall of the housing, the pump connected to the housing so as to receive under centrifugal pressure a liquid contained in the housing, when the housing is rotated, and said pump means having means to dispense the liquid to a point within the housing, the periphery of the housing diametrically opposite the pump being locally radially enlarged so that during rotation of the housing the centrifugal forces acting on the enlargement and the liquid it contains substantially centrifugally counter-balances the centrifugal forces acting on the pump arrangement.
2. A liquid supply system as claimed in claim 7 in which said mounting means connects the pump to the outer periphery of the rotatable housing.
3. A liquid supply system as claimed in claim 1 in which the pump arrangement includes means for driving the pump.
4. A liquid supply system as claimed in claim 7 in which said means for driving the pump comprises a rotary drive, at least one shaft and gear means connecting said rotary drive and said pump.
5. A liquid supply system as claimed in claim 4 in which said gear means comprises a differential gear.
6. A liquid supply system as claimed in claim 8 in which the periphery of the housing diametricallly opposite the pump is locally radially enlarged so that during rotation of the housing the centrifugal forces acting on the enlargement and the liquid it contains substantially centrifugally counter-balances the centrifugal forces acting on the pump arrangement.
7. A liquid supply system comprising an annular rotatable housing, means for rotating the housing, a pump arrangement including a pump, means for driving the pump and means for mounting the pump on the annular housing so as to rotate therewith, the pump having an inlet communicating with the interior of the housing so as to receive under centrifugal pressure a liquid contained in the housing when the housing is rotated, the
pump arrangement further including conduit means for providing a centrifugal force on the housing which connected to the pump and rotatable therewith for dispensing liquid from the pump to a point within the housing.
8. A system as claimed in claim 7, including means 5 substantially counter-balances the centrifugal forces acting on the pump arrangement.

Claims (8)

1. A liquid supply system comprising a rotatable housing having a circumferential wall, means for rotating the housing, a pump arrangement including a pump, means connecting the pump to the circumferential wall of the housing, the pump connected to the housing so as to receive under centrifugal pressure a liquid contained in the housing, when the housing is rotated, and said pump means having means to dispense the liquid to a point within the housing, the periphery of the housing diametrically opposite the pump being locally radially enlarged so that during rotation of the housing the centrifugal forces acting on the enlargement and the liquid it contains substantially centrifugally counterbalances the centrifugal forces acting on the pump arrangement.
2. A liquid supply system as claimed in claim 7 in which said mounting means connects the pump to the outer periphery of the rotatable housing.
3. A liquid supply system as claimed in claim 1 in which the pump arrangement includes means for driving the pump.
4. A liquid supply system as claimed in claim 7 in which said means for driving the pump comprises a rotary drive, at least one shaft and gear means connecting said rotary drive and said pump.
5. A liquid supply system as claimed in claim 4 in which said gear means comprises a differential gear.
6. A liquid supply system as claimed in claim 8 in which the periphery of the housing diametricallly opposite the pump is locally radially enlarged so that during rotation of the housing the centrifugal forces acting on the enlargement and the liquid it contains substantially centrifugally counter-balances the centrifugal forces acting on the pump arrangement.
7. A liquid supply system comprising an annular rotatable housing, means for rotating the housing, a pump arrangement including a pump, means for driving the pump and means for mounting the pump on the annular housing so as to rotate therewith, the pump having an inlet communicating with the interior of the housing so as to receive under centrifugal pressure a liquid contained in the housing when the housing is rotated, the pump arrangement further including conduit means connected to the pump and rotatable therewith for dispensing liquid from the pump to a point within the housing.
8. A system as claimed in claim 7, including means for providing a centrifugal force on the housing which substantially counter-balances the centrifugal forces acting on the pump arrangement.
US00250362A 1971-05-15 1972-05-04 Liquid dispensing devices Expired - Lifetime US3794440A (en)

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Application Number Priority Date Filing Date Title
GB1518371 1971-05-15

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3876333A (en) * 1973-02-17 1975-04-08 Dowtry Rotol Limited Gas turbine engines and bladed rotors therefor
US3891346A (en) * 1973-02-17 1975-06-24 Dowty Rotol Ltd Fans
US3893783A (en) * 1973-02-17 1975-07-08 Dowty Rotol Ltd Gas turbine engines and bladed rotors therefor
US3942911A (en) * 1973-02-17 1976-03-09 Dowty Rotol Limited Bladed rotors
US4668168A (en) * 1984-06-14 1987-05-26 J.M. Voith Gmbh Lubricating and cooling rotary bearings of axial blowers
US4693672A (en) * 1986-10-30 1987-09-15 United Technologies Corporation Two level oil dam
US4984968A (en) * 1988-11-04 1991-01-15 Ulstein Propeller A/S Variable pitch propellers

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2693248A (en) * 1950-05-03 1954-11-02 Gen Motors Corp Lubrication system
US2760341A (en) * 1951-02-28 1956-08-28 Voith Gmbh J M Fluid couplings
US3318644A (en) * 1965-02-24 1967-05-09 Gen Motors Corp Centrifugal bearing lubrication system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2693248A (en) * 1950-05-03 1954-11-02 Gen Motors Corp Lubrication system
US2760341A (en) * 1951-02-28 1956-08-28 Voith Gmbh J M Fluid couplings
US3318644A (en) * 1965-02-24 1967-05-09 Gen Motors Corp Centrifugal bearing lubrication system

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3876333A (en) * 1973-02-17 1975-04-08 Dowtry Rotol Limited Gas turbine engines and bladed rotors therefor
US3891346A (en) * 1973-02-17 1975-06-24 Dowty Rotol Ltd Fans
US3893783A (en) * 1973-02-17 1975-07-08 Dowty Rotol Ltd Gas turbine engines and bladed rotors therefor
US3942911A (en) * 1973-02-17 1976-03-09 Dowty Rotol Limited Bladed rotors
US4668168A (en) * 1984-06-14 1987-05-26 J.M. Voith Gmbh Lubricating and cooling rotary bearings of axial blowers
US4693672A (en) * 1986-10-30 1987-09-15 United Technologies Corporation Two level oil dam
US4984968A (en) * 1988-11-04 1991-01-15 Ulstein Propeller A/S Variable pitch propellers

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Publication number Publication date
IT957841B (en) 1973-10-20
FR2137820A1 (en) 1972-12-29
DE2223297A1 (en) 1972-11-30

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