In accordance with at least one aspect of this disclosure, a pump system for an aircraft includes, a cylinder barrel configured to rotate within a pump housing of a pump, and a plurality of pistons seated within a respective bore defined in the cylinder barrel. Each piston further includes a piston ring disposed at an end thereof configured to form a hydrodynamic seal with an inner surface of the respective bore. Each respective piston ring is of silicon nitride. In embodiments, the piston ring can include a chamfer on at least a leading edge of the piston ring. In embodiments, the piston ring can include a cut therethrough configured to allow for thermal expansion of the piston ring.
PISTON RING
2025-01-23
Patent
Electronic Resource
English
Piston and piston-ring temperatures
Engineering Index Backfile | 1940
|German piston and piston ring industry
TIBKAT | 1946
|Automotive engineering | 1979
|Engineering Index Backfile | 1941
|TIBKAT | 2003
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