Axial piston pump
Positive-displacement pump
An axial piston pump is a positive displacement pump that has a number of pistons in a circular array within a cylinder block.
It can be used as a stand-alone pump, a hydraulic motor or an automotive air conditioning compressor.
Description
An axial piston pump has a number of pistons (usually an odd number) arranged in a circular array within a housing which is commonly referred to as a cylinder block, rotor or barrel. This cylinder block is driven to rotate about its axis of symmetry by an integral shaft that is, more or less, aligned with the pumping pistons (usually parallel but not necessarily).
Mating surfaces. One end of the cylinder block is convex and wears against a mating surface on a stationary valve plate. The inlet and outlet fluid of the pump pass through different parts of the sliding interface between the cylinder block and valve plate. The valve plate has two semi-circular ports that allow inlet of the operating fluid and exhaust of the outlet fluid respectively.
Protruding pistons. The pumping pistons protrude from the opposite end of the cylinder block.
This brief starts where responsible research should: with the source description of “Axial piston pump” as positive-displacement pump. Everything that follows is an evidence route, not borrowed authority.
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The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Oct 20, 2024. The linked authority identifier is Q792495. None of the 0 selected statements returned an explicit reference.
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This entry incorporates text from “Axial piston pump” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.