Method and apparatus for returning the drain oil of a hydraulic motor
AssigneeIdeachip Oy
InventorMarkku Jonninen
Life of this patent
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Abstract
The invention relates to a method and apparatus for returning the oil drained from a working pressure space of a hydraulic motor into a motor casing to an oil line, which is connected to the motor and which is in communication via a divider with intra-motor flow channels which are in communication with the working pressure spaces. The oil seeping into the casing is conveyed by means of pressure variations internal of the hydraulic motor, pulsating consistently with rotating motion, into the oil line presently at a lower pressure and connected to the motor by way of said divider. Therefor, the casing space is connected by a return conduit through a one-way valve to at least one flow channel, which lies between the divider of the motor and the working pressure space of the motor.
Claims18
An apparatus for returning the oil drained from a working pressure space of a hydraulic motor into a motor casing to an oil line, which is connected to the motor and which is in communication via a divider with intra-motor flow channels between the divider and the motor which are in communication with the working pressure spaces, wherein the casing space is connected by a return conduit through a one-way valve to at least one flow channel, which lies between the divider of the motor and the working pressure space of the motor.
A method for the return of oil drained into the casing of a rotating hydraulic motor to a supply of oil for operating the motor, wherein said hydraulic motor includes a cyclically operable divider driven by said motor, intra-motor flow channels located between the divider and the motor working spaces for the supply of oil from a source to the motor and the return of oil to the source, wherein said method comprises delivering the oil drained into the casing of the motor by use of pressure differences in said intra-motor flow channels, said pressure differences being generated by pressure variations occurring upon rotary motion of the motor upon operation thereof, said oil being delivered into at least one of said intra-motor flow channels and through said divider to said source.
An apparatus for returning the oil drained from a working pressure space of a hydraulic motor into a motor casing to an oil line, which is connected to the motor and which is in communication via a divider with intra-motor flow channels between the divider and the motor which are in communication with the working pressure spaces comprising an oil return conduit connecting said casing to at least one of said intra-motor flow channels, said return conduit having a one-way valve allowing oil flow from the casing and blocking flow in the opposite direction, said apparatus further including means responsive to a pressure in at least one of said intra-motor flow channels lower than the pressure in another of said channels for return of said oil from said casing through said one-way valve to said source through said divider.
Dependencies are inferred from the claim text.