GB2150222A - Sliding-vane rotary motor or pump - Google Patents

Sliding-vane rotary motor or pump Download PDF

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Publication number
GB2150222A
GB2150222A GB08411185A GB8411185A GB2150222A GB 2150222 A GB2150222 A GB 2150222A GB 08411185 A GB08411185 A GB 08411185A GB 8411185 A GB8411185 A GB 8411185A GB 2150222 A GB2150222 A GB 2150222A
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United Kingdom
Prior art keywords
pressure
vanes
vane
fluid
sector
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.)
Granted
Application number
GB08411185A
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GB8411185D0 (en
GB2150222B (en
Inventor
Joseph Henry Sparkes
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Individual
Original Assignee
Individual
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Filing date
Publication date
Priority claimed from GB838319598A external-priority patent/GB8319598D0/en
Application filed by Individual filed Critical Individual
Publication of GB8411185D0 publication Critical patent/GB8411185D0/en
Publication of GB2150222A publication Critical patent/GB2150222A/en
Application granted granted Critical
Publication of GB2150222B publication Critical patent/GB2150222B/en
Expired 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
    • F01C1/00—Rotary-piston machines or engines
    • F01C1/30—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F01C1/34—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members
    • F01C1/344—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F01C1/3446—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along more than one line or surface

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Hydraulic Motors (AREA)

Abstract

Each of the vanes B is biassed outwardly by the pressure of the working fluid applied to the radially-inner edge through passages H in the vane. Springs P may be provided to keep the vane in contact with cam surfaces C, K at all times. <IMAGE>

Description

SPECIFICATION Rotary Hydraulic Motor/Pump The invention relates to a rotary hydraulic motor or pump that may be rotated in either direction and can be utilised in many applications and may provide variable speed/torque requirements when being driven by fluid under pressure as an hydraulic motor. It is particularly suitable as a wheel motor for the hydraulic drive system described previously in Patent Application Nos. 8319598 and 8320850.
The present invention comprises an inner rotating member which carries a number of movable vanes or members that can move radially.
The outer tips of these vanes will register with and follow the contour of a profile formed on the inner surface of the fixed outer member (that provide land and pressure sectors), as the inner member is rotated.
Fluid pressure acting on one or more vanes will cause the inner member to rotate; this member is connected to the final drive which is supported by bearings to run concentric with the outer fixed member.
A specific embodiment of the invention described as an hydraulic motor and rotating as indicated by arrow T' by way of example with reference to the accompanying drawing No. 101 in which: Fluid under pressure entering one or more inlet ports 'A' will act on all vanes 'B' that are within a pressure sector 'C', which sector is formed by profile of the inner surface of the outer fixed member'D', and cause the inner rotating member 'E' to rotate with its final drive or shaft 'F'. Fluid ahead of such vanes will be displaced through outlet ports '6', which ports are vented to atmosphere.
Communicating passages 'H' to spaces below each vane 'J' is an important feature and will serve two functions as follows:- 1). When a vane is within a land sector 'K' it's function is to prevent the flow-back of fluid against pressure as shown at 'L'.
Pressure acting upon the outer tip of the vane will be balanced by the same pressure applied to it's inner surface at 'J' via the communicating passage 'H', and since the outer tip of the vane will be in contact with the land sector 'K' a slightly greater area of pressure at it's inner surface will ensure that the vane is held in contact with the land sector for all pressures.
2). When a vane atM' is within a pressure sector 'C' it will move radially in both directions as it rotates and the communicating passages 'H' will allow fluid below the vane at 'J' to be displaced; such fluid in this condition will be at atmosphere.
The outer tip of the vanes are profiled to facilitate both functions and allow gradual contact of it's entire surface with the outer member at 'N' as they rotate.
The spaces below the vanes 'J' could be connected to the fluid pressure by other passages and not necessarily via the vanes as shown.
To ensure that the vane tips are held in contact with the inner profile of the fixed outer member 'D' at all times, springs 'P' (not necessarily coil springs as shown) are fitted to act on the vanes to exert an outward force, or fluid pressure maintained below the vanes can be utilised to exert this force.
It is to be understood that as a vane 'B' enters a pressure sector 'C' the number of such vanes in relation to the inner profile of the outer fixed member 'D' will be such that a following vane will have entered a land sector 'K', thus allowing the description as in 1). to occur, and that the entry of such vanes into each pressure sector will be staggered to improve the linear torque characteristic to the final drive. The number of pressure sectors 'C' may be varied from unity and in profile to suit varying applications, and not necessarily be three as shown.
When higher pressures are to be negotiated rotor seals 'R' will be fitted to prevent fluid leakage past the rotor and vane sides as indicated at 'S'; each individual seal may be as one piece as shown or as a separate seal at each side of the rotor, either bonded to the rotor or by retainers, not shown in the drawing.
Reverse Drive To drive the mechanism in a reverse direction to that previously described the fluid under pressure will enterthe ports '6' and discharge through ports 'A', (which ports 'A' will be at atmosphere), by valve arrangement.
In this mode, the communicating passages 'H' will allow pressure to act below each vane so as to prevent flowback against pressure when a vane is within a pressure sector; it will be seen that such fluid pressure will now be acting on that side of a vane exposing the communicating passages to the spaces 'J' to create the conditions as in 2). When in a land sector, the fluid above the vane will be at atmosphere, and the springs 'P' will maintain tip contact with the land sector.
For variable speed/torque applications from a fixed delivery of fluid under pressure, more than one pressure sector will be created in the design as previously described and it will depend upon the number of such places selected for the flow of fluid under pressure to occur; a full description of this principle is described in previous patent applications nos:- 8319598 and 8320850.
When the rotating member is being driven as an hydraulic pump in either direction by its final drive or shaft 'F' a vane 'B' will draw in fluid as it leaves a port at a point of entry to a pressure sector, and discharge under pressure fluid ahead of it through the other port before entering a land sector; flowback against pressure is as described in 1). and 2). by the communicating passages 'H'.
1. A rotary hydraulic motor/pump comprising an inner rotating member which carries vanes that can move radially as their outer tips are bearing against and follow the contour of a profile formed on the inner surface of a fixed outer member as rotation occurs.
The outer tips of the vanes are so shaped as to ensure that fluid pressure ahead of any vane will be
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (4)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Rotary Hydraulic Motor/Pump The invention relates to a rotary hydraulic motor or pump that may be rotated in either direction and can be utilised in many applications and may provide variable speed/torque requirements when being driven by fluid under pressure as an hydraulic motor. It is particularly suitable as a wheel motor for the hydraulic drive system described previously in Patent Application Nos. 8319598 and 8320850. The present invention comprises an inner rotating member which carries a number of movable vanes or members that can move radially. The outer tips of these vanes will register with and follow the contour of a profile formed on the inner surface of the fixed outer member (that provide land and pressure sectors), as the inner member is rotated. Fluid pressure acting on one or more vanes will cause the inner member to rotate; this member is connected to the final drive which is supported by bearings to run concentric with the outer fixed member. A specific embodiment of the invention described as an hydraulic motor and rotating as indicated by arrow T' by way of example with reference to the accompanying drawing No. 101 in which: Fluid under pressure entering one or more inlet ports 'A' will act on all vanes 'B' that are within a pressure sector 'C', which sector is formed by profile of the inner surface of the outer fixed member'D', and cause the inner rotating member 'E' to rotate with its final drive or shaft 'F'. Fluid ahead of such vanes will be displaced through outlet ports '6', which ports are vented to atmosphere. Communicating passages 'H' to spaces below each vane 'J' is an important feature and will serve two functions as follows:- 1). When a vane is within a land sector 'K' it's function is to prevent the flow-back of fluid against pressure as shown at 'L'. Pressure acting upon the outer tip of the vane will be balanced by the same pressure applied to it's inner surface at 'J' via the communicating passage 'H', and since the outer tip of the vane will be in contact with the land sector 'K' a slightly greater area of pressure at it's inner surface will ensure that the vane is held in contact with the land sector for all pressures. 2). When a vane atM' is within a pressure sector 'C' it will move radially in both directions as it rotates and the communicating passages 'H' will allow fluid below the vane at 'J' to be displaced; such fluid in this condition will be at atmosphere. The outer tip of the vanes are profiled to facilitate both functions and allow gradual contact of it's entire surface with the outer member at 'N' as they rotate. The spaces below the vanes 'J' could be connected to the fluid pressure by other passages and not necessarily via the vanes as shown. To ensure that the vane tips are held in contact with the inner profile of the fixed outer member 'D' at all times, springs 'P' (not necessarily coil springs as shown) are fitted to act on the vanes to exert an outward force, or fluid pressure maintained below the vanes can be utilised to exert this force. It is to be understood that as a vane 'B' enters a pressure sector 'C' the number of such vanes in relation to the inner profile of the outer fixed member 'D' will be such that a following vane will have entered a land sector 'K', thus allowing the description as in 1). to occur, and that the entry of such vanes into each pressure sector will be staggered to improve the linear torque characteristic to the final drive. The number of pressure sectors 'C' may be varied from unity and in profile to suit varying applications, and not necessarily be three as shown. When higher pressures are to be negotiated rotor seals 'R' will be fitted to prevent fluid leakage past the rotor and vane sides as indicated at 'S'; each individual seal may be as one piece as shown or as a separate seal at each side of the rotor, either bonded to the rotor or by retainers, not shown in the drawing. Reverse Drive To drive the mechanism in a reverse direction to that previously described the fluid under pressure will enterthe ports '6' and discharge through ports 'A', (which ports 'A' will be at atmosphere), by valve arrangement. In this mode, the communicating passages 'H' will allow pressure to act below each vane so as to prevent flowback against pressure when a vane is within a pressure sector; it will be seen that such fluid pressure will now be acting on that side of a vane exposing the communicating passages to the spaces 'J' to create the conditions as in 2). When in a land sector, the fluid above the vane will be at atmosphere, and the springs 'P' will maintain tip contact with the land sector. For variable speed/torque applications from a fixed delivery of fluid under pressure, more than one pressure sector will be created in the design as previously described and it will depend upon the number of such places selected for the flow of fluid under pressure to occur; a full description of this principle is described in previous patent applications nos:- 8319598 and 8320850. When the rotating member is being driven as an hydraulic pump in either direction by its final drive or shaft 'F' a vane 'B' will draw in fluid as it leaves a port at a point of entry to a pressure sector, and discharge under pressure fluid ahead of it through the other port before entering a land sector; flowback against pressure is as described in 1). and 2). by the communicating passages 'H'. CLAIMS
1. A rotary hydraulic motor/pump comprising an inner rotating member which carries vanes that can move radially as their outer tips are bearing against and follow the contour of a profile formed on the inner surface of a fixed outer member as rotation occurs.
The outer tips of the vanes are so shaped as to ensure that fluid pressure ahead of any vane will be communicated to its lower surface to exert an equal and opposite force to maintain contact of the outer tip with the profile of the fixed outer member. When fluid pressure is behind a vane so as to act upon itto cause rotation as a motor, the fluid pressure will be isolated from the outer top surface and allow fluid to be displaced from below the vane as it moves radially. Communicating passages are provided to serve these functions, assisted by springs that will exert an outward force to the vanes. Profiling of the inner surface of the fixed outer member may be such as to allow any number of places that may be chosen from unity to act upon the vanes as a motor, orto create fluid flow as a pump, with a corresponding number of inlet and outlet ports.
When more than one profile is formed at the inner surface of the fixed outer member to receive and discharge fluid, the number of such places may be selected to receive the supply of fluid, thus the speed and torque may be varied to suit conditions as a motor. When the rotating member is being driven to generate flow as a pump, the number of such places may be selected to vary displacement, or utilised as separate pumps for separate functions.
2. A rotary hydraulic motor/pump as in Claim 1, wherein the communicating passages to the inner surface of the vanes are holes that connect to each end of the vanes.
3. A rotary hydraulic motor/pump as in Claim 1, wherein the communicating passages to the inner surface of the vanes are by slots formed in the leading face of the vanes when utilised as a motor, and will be the trailing side when utilised as a pump.
4. A rotary hydraulic motor/pump as in Claim 1, wherein the communicating passages to the inner surface of the vanes are by circular grooves formed in one or both end plates and their length determined to apply pressure to suit the radial positions of the vanes.
GB08411185A 1983-07-20 1984-05-02 Sliding-vane rotary motor or pump Expired GB2150222B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB838319598A GB8319598D0 (en) 1983-07-20 1983-07-20 Variable speed/torque hydraulic transmission system
GB08320850A GB2146101A (en) 1983-07-20 1983-08-03 Variable speed/torque hydraulic transmission system

Publications (3)

Publication Number Publication Date
GB8411185D0 GB8411185D0 (en) 1984-06-06
GB2150222A true GB2150222A (en) 1985-06-26
GB2150222B GB2150222B (en) 1988-01-20

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GB08411185A Expired GB2150222B (en) 1983-07-20 1984-05-02 Sliding-vane rotary motor or pump

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988001014A1 (en) * 1986-07-30 1988-02-11 Santa Rosa Pelopidas G Synchronous multiactivated hydromotor
US4822265A (en) * 1986-08-08 1989-04-18 Dover Resources, Inc. Pump rotor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB318638A (en) * 1928-09-08 1930-10-16 Casimir Wrona Improvements in rotary pumps
GB667140A (en) * 1948-10-19 1952-02-27 Henri Charles Gustave Vincent Improvements in rotary pumps and engines
GB1175128A (en) * 1966-12-13 1969-12-23 Hiab Foco Ab Rotary Hydraulic Pumps or Motors
GB1246084A (en) * 1967-09-21 1971-09-15 Towler Hydraulics Ltd A rotary hydraulic machine having a rotor carrying radially slidable vanes
GB1501587A (en) * 1975-07-15 1978-02-15 Bosch Gmbh Robert Vane pump or motor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB318638A (en) * 1928-09-08 1930-10-16 Casimir Wrona Improvements in rotary pumps
GB667140A (en) * 1948-10-19 1952-02-27 Henri Charles Gustave Vincent Improvements in rotary pumps and engines
GB1175128A (en) * 1966-12-13 1969-12-23 Hiab Foco Ab Rotary Hydraulic Pumps or Motors
GB1246084A (en) * 1967-09-21 1971-09-15 Towler Hydraulics Ltd A rotary hydraulic machine having a rotor carrying radially slidable vanes
GB1501587A (en) * 1975-07-15 1978-02-15 Bosch Gmbh Robert Vane pump or motor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988001014A1 (en) * 1986-07-30 1988-02-11 Santa Rosa Pelopidas G Synchronous multiactivated hydromotor
US4822265A (en) * 1986-08-08 1989-04-18 Dover Resources, Inc. Pump rotor

Also Published As

Publication number Publication date
GB8411185D0 (en) 1984-06-06
GB2150222B (en) 1988-01-20

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PCNP Patent ceased through non-payment of renewal fee