時間：2011-03-11 23:18來源：藍(lán)天飛行翻譯 作者：航空 點(diǎn)擊：次
|
slip (induction motor specification). The difference between the synchronous speed of an induction motor (the speed of the rotating magnetic field in the stator) and the actual speed the rotor is turning. An induction motor tries to turn at its synchronous speed, but friction and the mechanical load connected to the rotor prevent it turning at this speed. The amount the rotor lags behind the rotating field is called slip. It is slip that gives the motor its torque. The greater the slip, the greater the pull between the magnetic fields in the rotor and stator. Slip is measured in percentage of the synchronous speed. slip clutch (aircraft starter component). A heavy spring-loaded mechanism built into an aircraft reciprocating-engine starter that allows the starter drive to slip enough to take up the initial shock when the starter is engaged. The slip clutch minimizes the shock that could damage the engine or the starter when the starter engages. slip joint (reciprocating engine exhaust system component). A type of connection used in the exhaust system of a reciprocating engine that provides for the expansion of the system components as they get hot. The exhaust system is assembled and connected together with ball joints, bellows, and slip joints that allow the system to move and not crack. Slip joints fit together loosely when the system is cold, but tighten when the components reach their operating temperature. slippage mark (tires and tubes). A small mark painted between a wheel and a tube-type tire. The mark is half on the tire and half on the wheel. If the mark on the tire is not lined up with the mark on the wheel, it shows that the tire has slipped on the wheel. When a tire slips, the valve in the tube is likely to be damaged, and the tire should be removed from the wheel and the tube examined. slip rings (electrical machine). Smooth, continuous rings of brass or copper mounted on the rotor shaft of an electrical generator or alternator. Current used to produce the magnetic field in the rotor of a DC alternator flows into the rotor coil through slip rings. Slip rings also carry current into the deicer heating coils on an airplane propeller blade. slip-roll former (sheet metal tool). A type of sheet-metal shop tool used to form large-radius curves in sheets of metal. Slip-roll formers have three hardened steel rollers mounted in a framework. One roller, the drive roller, is turned with a hand crank to pull the metal through the former. The clamp roller is adjustable up or down to clamp the sheet metal tightly against the drive roller. slip stick (mathematics). A commonly used term for a slide rule. This name comes from the fact that most slide rules have a slide that slips in and out of grooves in the body of the rule. |
