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A gyroscope in which a spherical rotor of superconducting niobium spins while in levitation at cryogenic temperatures. Also known as superconducting gyroscope.

Related Terms

THRUST-RADIAL BEARING

This unit has the ends of the babbitt bearing extended radially over the end of the shell. Collars on the rotor face these thrust pads, and the journal is supported in the bearing between the thrust collars.

REACTION TURBINE

A reaction turbine utilizes a jet of steam that flows from a nozzle on the rotor. Actually, the steam is directed into the moving blades by fixed blades designed to expand the steam. The result is a small increase in velocity over that of the moving blades. These blades form a wall of moving nozzles that further expand the steam. The steam flow is partially reversed by the moving blades, producing a reaction on the blades. Since the pressure drop is small across each row of nozzles (blades), the speed is comparatively low. Therefore, more rows of moving blades are needed than in an impulse turbine.

ROTOR

A rotating part of the device: electric motor, turbine, generator.

ELECTROSTATIC GYRO

A gyroscope in which a small ball rotor is electrically suspended within an array of electrodes in a vacuum inside a ceramic envelope. See also GYRO, ELECTRICALLY SUS- PENDED GYRO.

FREE GYRO

A two-degree-of-freedom gyro or a gyro the spin axis of which may be oriented in any specified altitude. The rotor of this gyro has freedom to spin on its axis, freedom to tilt about its horizontal axis, and freedom to turn about its vertical axis. Also called FREE GYROSCOPE

FAN

A machine consisting of a rotor and housing for moving air or gases at relatively low-pressure differentials.

BALANCED VANE

Has two inlet ports and two outlet ports. Reduces the side loading on the rotor.

ROTARY PUMP

A positive displacement pump most commonly used in hydraulic systems. Contains one or more rotors which divide pump internal space into several compartments carrying liquid from suction to discharge as rotor(s) rotate. Examples are spur gear, internal gear, sliding vane and screw pumps.

AXIAL FLOW COMPRESSOR

A compressor that uses rotor blades shaped like airfoils that give the air a high velocity and push it into subsequent stationary blade passages that convert the velocity energy into pressure. This process is repeated through several stages. The airflow movement is axial.

TURNING GEAR

A turning device that assures the turbine rotor is being rotated for the purpose of even cooling after a shutdown.
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