دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: in a reciprocating compressor, the volume between the top of the piston and the cylinder head with the piston at the top of its stroke.

n: the device used to seal the top of a cylinder. In modem drilling rig engines, it also houses the valves and has exhaust passages. In four-cycle operation, the cylinder head also has intake passages. Also called head.

n: 1. the height of a column of liquid required to produce a specific pressure. See hydraulic head. 2. for centrifugal pumps, the velocity of flowing fluid converted into pressure expressed in feet or metres of flowing fluid. Also called velocity head. 3.that part of a machine (such as a pump or an engine) that is on the end of the cylinder opposite the crankshaft. Also called cylinder head.

n: refer tohydraulic head

n: a thin piece of material made of cork or other similar material placed between an engines cylinder head and engine block. It seals between the head and block, and flexes to maintain the seal as the head and block expand at different rates with changes in engine temperature.