Radial piston pumps
AssigneeDomin Fluid Power Limited
InventorAndrew Collins
Life of this patent
Estimating the term…
Abstract
A radial piston pump comprising a rotor mounted for rotation on a pintle. The rotor comprises a plurality of piston chambers, a piston being mounted in each of said chambers for reciprocal movement. The pump comprises at least one auxiliary flow path which connects another component of the pump to the piston chambers. The pintle comprises a plurality of flow galleries comprising at least one supply flow gallery forming part of a supply flow path, at least one exit flow gallery forming part of an exit flow path and at least one auxiliary flow gallery forming part of the auxiliary flow path.
Claims21
A radial piston pump comprising a rotor mounted for rotation on a pintle, the rotor comprising a plurality of piston chambers, a piston being mounted in each of the chambers for reciprocal movement, the pump comprising:
- at least one supply flow path which, in use, connects one or more of the plurality of piston chambers to a supply of low-pressure fluid,
- at least one exit flow path via which, in use, high-pressure fluid from one or more of the plurality of piston chambers leaves the pump;
- and
- at least one auxiliary flow path which connects another component of the pump to one or more of the plurality of piston chambers,
- wherein the pintle comprises a plurality of flow galleries comprising at least one supply flow gallery forming part of the supply flow path, at least one exit flow gallery forming part of the exit flow path and at least one auxiliary flow gallery forming part of the auxiliary flow path.
A method of operating a radial piston pump comprising a rotor mounted for rotation on a pintle, wherein:
- the rotor comprises a plurality of piston chambers, a piston being mounted in each of the plurality of piston chambers for reciprocal movement;
- fluid flows along at least one supply flow path from a supply of low-pressure fluid to one or more of the plurality of piston chambers;
- high-pressure fluid from one or more of the plurality of piston chambers leaves the pump via at least one exit flow path;
- high-pressure fluid from one or more of the plurality of piston chambers flows to another component of the pump via at least one auxiliary flow path and is used in an operation of the component;
- and
- fluid on the at least one supply flow path, the at least one exit flow path and the at least one auxiliary flow path flows through one or more flow galleries in the pintle.
A radial piston pump comprising a rotor mounted for rotation on a pintle, the rotor comprising a plurality of piston chambers, a piston being mounted in each of the chambers for reciprocal movement, the pump comprising:
- at least one supply flow path which, in use, connects one or more of the plurality of piston chambers to a supply of low-pressure fluid;
- at least one exit flow path via which, in use, high-pressure fluid from one or more of the plurality of piston chambers leaves the pump;
- at least one auxiliary flow path which connects another component of the pump to one or more of the plurality of piston chambers;
- and
- a return flow path connected to an outlet of the another component of the pump such that, in use, fluid leaves the another component and/or the pump via the return flow path,
- wherein the pintle comprises a plurality of flow galleries comprising at least one supply flow gallery forming part of the supply flow path, at least one exit flow gallery forming part of the exit flow path, at least one auxiliary flow gallery forming part of the auxiliary flow path and at least one return flow gallery forming part of the return flow path.
Dependencies are inferred from the claim text.