US3528757A - Rotary machines - Google Patents

Rotary machines Download PDF

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Publication number
US3528757A
US3528757A US741052A US3528757DA US3528757A US 3528757 A US3528757 A US 3528757A US 741052 A US741052 A US 741052A US 3528757D A US3528757D A US 3528757DA US 3528757 A US3528757 A US 3528757A
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US
United States
Prior art keywords
chamber
rotor
abutment
rotor member
end wall
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.)
Expired - Lifetime
Application number
US741052A
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English (en)
Inventor
Peter G Ware
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.)
Dunlop Co Ltd
Original Assignee
Dunlop Co 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
Application filed by Dunlop Co Ltd filed Critical Dunlop Co Ltd
Application granted granted Critical
Publication of US3528757A publication Critical patent/US3528757A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • F01C21/102—Adjustment of the interstices between moving and fixed parts of the machine by means other than fluid pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/08—Rotary pistons

Definitions

  • a rotary machine comprising a rotor member supported within a chamber, an adjustment screw on the chamber being engageable with an abutment on the rotor member for adjustment of the axial position of the rotor member.
  • This invention relates to rotary machines, for example rotary vane pumps or duid-pressure operated motors, of the kind in which a rotor member is supported within a chamber and has an end face which is intended to run in close proximity to an end wall of the chamber so as to provide a substantially fluid-tight seal.
  • One object of the invention is to provide a rotary machine having adjustable means for controlling the clearance between a rotor member and an associated end wall.
  • a rotary machine comprises a chamber, a rotor member supported within the chamber and having an end face arranged to move in close proximity to an end wall of the chamber and an adjuster means comprising a first abutment associated with the end wall and aligned with the axis of rotation of the rotor member and a second abutment associated with the rotor member and engageable with the first abutment, the first abutment being axially movable relative to the end wall to edect adjustment of lthe axial position of the rotor member.
  • a rotary vane pump comprises a pump chamber, a movable vane rotor member supported within the chamber and having an end face arranged to move in close proximity to an end wall of the chamber and an adjuster means comprising a first abutment associated with the end wall and aligned with the axis of rotation of the rotor member and a second abutment associated with the rotor member and engageable with the first abutment, the rst abutment being axially movable relative to lthe end wall to effect adjustment of the axial position of the rotor member.
  • the first abutment is in the form of a hardened steel surface formed by the end surface of an adjust ment screw which passes through a screw-threaded bore in the end wall in line with the axis of the rotor member, the adjustment screw being lockable in any desired axial position by means of a locknut engaging the screw on the outer side of the end lwall.
  • the second abutment may take the form of a hardened steel button pressed into a central recess in the end face of the rotor member.
  • a rotary vane vacuum pump comprises a cylindrical housing 1 assembled from a pair of generally fiat radially extending end walls 2, 3 ⁇ and a cylindrical body portion '4.
  • the housing is mounted on the casing 5 of an electric motor by means of mounting bolts 6 which also serve to secure the end walls 2, 3 one on each side of the cylindrical body portion 4.
  • the shaft 7 of the electric motor projects, through a low friction bush 8 located in an opening formed at an olf-centre position in the end Wall 3 of the housing, into a cylindrical chamber 9 within the housing.
  • a movable vane rotor 10 is keyed to, and locked in a 3,528,757 Patented Sept. 15, 1970 fixed axial position on the shaft 7, and is provided with four circumferentially spaced, tangentially slidable vanes 1'1' for engagement with the cylindrical walls of the body portion 4, the axial length of the rotor being slightly less than the axial length of the chamber 9 within which it is housed so as to enable the rotor to rotate freely within the housing.
  • Inlet and delivery ports are formed in the axially outer end wall 2 of the housing, that is, the wall remote from the motor, and this end wall constitutes a cylinder head.
  • the general arrangement and operation of the pump is conventional, the off-centre location of the rotor 10 resulting in the portion of the chamber 9 above the shaft 7 as seen in the drawing being of smaller volume than the portion of the chamber below the shaft.
  • the inlet port opens into the latter portion of the chamber, and fluid entering through the inlet port is trapped between successive vanes of the rotor and its pressure raised as it is carried round to the smaller volume portion of the chamber where the fluid is allowed to discharge through the delivery port
  • the axially outer end wall 2 of the housing 1 has a screw-threaded bore y12 formed in axial alignment with the shaft 7 of the electric motor, and this bore contains, in screw-threaded engagement with the bore, a hardened steel adjustment screw 13 having a part-spherical surface 14 on its axially inner end which projects into the chamber 9 and constitutes a first abutment.
  • the adjustment screw is provided with a screwdriver slot 15 in its axially outer end and can be locked in a fixed axial position by means of a
  • the axially outer end face of the rotor is formed with a central recess 17 in which a hardened steel button 18 is located the button having an axially outwardly facing partspherical surface 19 which is engageable with the corresponding surface 14 formed on the adjustment screw 13, the button constituting a second abutment which is engageable with the first abutment to control the mini- 'mum clearance between the axially outer end face of the rotor 10 and the axially outer end wall 2 of the housing 1.
  • the rotor 10 In setting up the vacuum pump described above the rotor 10 is locked to the motor shaft 7 in a position which will provide, in the axially innermost position permitted by the end float of the motor shaft, a nominal clearance of 0:0015 of an inch between the axially inner end face of the rotor and the associated end wall 3 of the housing ⁇ 1, and a nominal clearance of 0 00'4 of an inch between the axially outer face of the rotor and the axially outer end wall 2, which constitutes the cylinder head.
  • the cylinder head is then secured in position and the motor is energised to drive the pump. While the pump is being driven the minimum running clearance between the rotor 10 and the cylinder head 2 is adjusted as follows: the adjustment screw 13 is tightened until the power consumed by the motor in driving the pump begins to rise sharply indicating that the motor shaft 7 is being retarded by friction in its bearings brought about by the end loading applied by the screw.
  • the rotor can safely be set to operate at a smaller clearance from the cylinder head than has 'been the practice in the design of conventional vacuum pumps.
  • deflection of the shaft 7 may cause tip contact between the radially outer portion of the rotor Varies 11 and the cylinder head face.
  • the edges of the vanes may be roughened by a fine grooving technique, which may be supplemented by vapour blasting so that when contact with the cylinder head occurs the crests between the grooves are rubbed down to the extent necessary to avoid local high loading.
  • the edges of the vanes may alternatively be broken up by coining to give a reticulated pattern.
  • a further way in which seizure or scuifing between the rotor and the cylinder head may be avoided lies in the use of a coating of a dry lubricant such as a polytetraiiuorethylene or graphite emulsion, or molybdenum disulphide in a suitable bonding agent.
  • a layer of low-friction metal such as lead or lead/tin, lead/indium alloy may alternatively be applied either to a plain or a grooved rotor end face.
  • a rotary machine comprising a chamber, a rotor member supported within the chamber and having an end face arranged to move in close proximity to an end wall of the chamber and an adjuster means comprising a Iirst abutment associated with the end wall and aligned with the axis of rotation of the rotor member and a second abutment mounted on the rotor member and engageable with the first abutment, the iirst abutment being axially movable relative to the end wall to effect adjustment of the axial position of the rotor member.
  • a rotary vane pump comprising a pump chamber
  • va movable vane rotor member supported within the chamber and having an end face arranged to move in close proximity to an end Wall of the chamber and an adjuster means comprising a first abutment associated with the end wall and aligned with the axis of rotation of the rotor member and a second abutment mounted on the rotor member and engageable with the first abutment, the iirst abutment being axially movable relative to the end wall to effect adjustment of the axial position of the rotor member.
  • a rotary vane pump according to claim 2 wherein the abutments comprise hardened steel surfaces.
  • a rotary vane pump according to claim 2 wherein the iirst abutment comprises a hardened surface formed by the end surface of a steel adjustment screw which engages a threaded bore in themend wall of the chamber, the screw being arranged with its axis aligned with the axis of rotation of the rotor member.
  • a rotary vane pump according to claim 2 wherein at least a portion of the end face of the rotor member is covered with a layer of a low friction metal.
  • a rotary vane pump comprising a pump chamber, a movable vane rotary member supported within the chamber and having an end face arranged to move in close proximity to an end wall of the chamber and an adjuster means comprising a first abutment associated with the end ⁇ wall and aligned with the axis of rotation of the rotor member and a second abutment comprising a hardened steel button pressed into a recess formed in the end face of the rotor member and aligned with the axis of rotation of the member so as to be engageable with the rst abutment, the iirst abutment being axially movable relative to the end wall to effect adjustment of the axial position of the rotor member.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Rotary Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
US741052A 1967-07-08 1968-06-28 Rotary machines Expired - Lifetime US3528757A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3153767 1967-07-08

Publications (1)

Publication Number Publication Date
US3528757A true US3528757A (en) 1970-09-15

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ID=10324589

Family Applications (1)

Application Number Title Priority Date Filing Date
US741052A Expired - Lifetime US3528757A (en) 1967-07-08 1968-06-28 Rotary machines

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Country Link
US (1) US3528757A (en, 2012)
GB (1) GB1226960A (en, 2012)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3902830A (en) * 1972-02-21 1975-09-02 Nippon Piston Ring Co Ltd Side seal means for use in rotary piston internal combustion engine
US4032268A (en) * 1974-03-07 1977-06-28 Wankel Gmbh Rotary piston engine
US4072451A (en) * 1976-10-12 1978-02-07 Sperry Rand Corporation Power transmission
US4681519A (en) * 1983-05-20 1987-07-21 Nippon Piston Ring Co., Ltd. Rotor for rotary fluid pump
EP0474475A3 (en) * 1990-09-07 1992-04-22 A. Ahlstrom Corporation Centrifugal pump
EP0474476A3 (en) * 1990-09-07 1992-05-06 A. Ahlstrom Corporation Rotary pump
WO2003010418A1 (en) * 2001-07-21 2003-02-06 Edwards Thomas C Single-degree-of-freedom controlled-clearance univanetm fluid-handling machine
CN116950895A (zh) * 2023-07-07 2023-10-27 昆明藤耀机械设备有限公司 一种用于污水处理的罗茨鼓风机
US12006828B2 (en) * 2018-08-24 2024-06-11 Tatsuno Corporation Displacement pump for fuel vapor recovery

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8322811D0 (en) * 1983-08-25 1983-09-28 Drum Eng Co Ltd Vane compressor
CN102926994B (zh) * 2012-11-28 2015-09-16 无锡威孚精密机械制造有限责任公司 具有减摩镀层的补油泵

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2371081A (en) * 1941-02-06 1945-03-06 Hydraulic Dev Corp Inc Vane pump
US2462481A (en) * 1944-11-17 1949-02-22 Estey Products Corp Sliding vane pump or motor
US2651453A (en) * 1949-05-20 1953-09-08 Bendix Aviat Corp Adjustable dowel pin
US2850985A (en) * 1955-02-03 1958-09-09 Gutehoffnungsschutte Sterkrade Deformation compensating supporting arrangement for rotary machines
US3104616A (en) * 1961-08-14 1963-09-24 Clark Equipment Co Pressure loaded gear pump
US3327638A (en) * 1966-12-13 1967-06-27 Seognamillo Frank Rotary machine with end plates sealing blades sliding in slots in a rotor
US3343782A (en) * 1967-09-26 Bearing and sealing means
US3429228A (en) * 1966-11-30 1969-02-25 Smith Corp A O Friction-free fluid meter
US3439623A (en) * 1966-10-22 1969-04-22 Zahnradfabrik Friedrichshafen Rotary pump for power steering systems

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3343782A (en) * 1967-09-26 Bearing and sealing means
US2371081A (en) * 1941-02-06 1945-03-06 Hydraulic Dev Corp Inc Vane pump
US2462481A (en) * 1944-11-17 1949-02-22 Estey Products Corp Sliding vane pump or motor
US2651453A (en) * 1949-05-20 1953-09-08 Bendix Aviat Corp Adjustable dowel pin
US2850985A (en) * 1955-02-03 1958-09-09 Gutehoffnungsschutte Sterkrade Deformation compensating supporting arrangement for rotary machines
US3104616A (en) * 1961-08-14 1963-09-24 Clark Equipment Co Pressure loaded gear pump
US3439623A (en) * 1966-10-22 1969-04-22 Zahnradfabrik Friedrichshafen Rotary pump for power steering systems
US3429228A (en) * 1966-11-30 1969-02-25 Smith Corp A O Friction-free fluid meter
US3327638A (en) * 1966-12-13 1967-06-27 Seognamillo Frank Rotary machine with end plates sealing blades sliding in slots in a rotor

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3902830A (en) * 1972-02-21 1975-09-02 Nippon Piston Ring Co Ltd Side seal means for use in rotary piston internal combustion engine
US4032268A (en) * 1974-03-07 1977-06-28 Wankel Gmbh Rotary piston engine
US4072451A (en) * 1976-10-12 1978-02-07 Sperry Rand Corporation Power transmission
US4681519A (en) * 1983-05-20 1987-07-21 Nippon Piston Ring Co., Ltd. Rotor for rotary fluid pump
EP0474475A3 (en) * 1990-09-07 1992-04-22 A. Ahlstrom Corporation Centrifugal pump
EP0474476A3 (en) * 1990-09-07 1992-05-06 A. Ahlstrom Corporation Rotary pump
WO2003010418A1 (en) * 2001-07-21 2003-02-06 Edwards Thomas C Single-degree-of-freedom controlled-clearance univanetm fluid-handling machine
US6623261B2 (en) * 2001-07-21 2003-09-23 Thomas C. Edwards Single-degree-of-freedom controlled-clearance univane™ fluid-handling machine
US12006828B2 (en) * 2018-08-24 2024-06-11 Tatsuno Corporation Displacement pump for fuel vapor recovery
CN116950895A (zh) * 2023-07-07 2023-10-27 昆明藤耀机械设备有限公司 一种用于污水处理的罗茨鼓风机

Also Published As

Publication number Publication date
GB1226960A (en, 2012) 1971-03-31

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