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
23.01.2025
Patent
Elektronische Ressource
Englisch
Piston and piston-ring temperatures
Engineering Index Backfile | 1940
|German piston and piston ring industry
TIBKAT | 1946
|TIBKAT | 2003
|Engineering Index Backfile | 1931
|Engineering Index Backfile | 1943
|