时间：2011-03-11 23:11来源：蓝天飞行翻译 作者：admin 点击：次
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current-limiting resistor (electrical circuit). A resistor used to limit the maximum amount of current allowed to flow in a circuit. A current-limiting resistor is often installed in series with a fuse to limit the maximum amount of current that can flow before the fuse heats up enough to melt and open the circuit. current regulator. A device or circuit in the output of an electrical power source that maintains a constant output current. If the load demands more current, the regulator raises the output voltage. If the load demands less current than that for which the regulator is set, the regulator lowers the output voltage. current transformer. An electrical transformer used for measuring or control purposes. The primary winding of a current transformer is installed in series with the electrical load, and the voltage produced in the transformer secondary winding is proportional to the amount of load current. Curtiss Jenny (Curtiss JN4-D airplane). A World War I training airplane powered by a Curtiss OX-5 engine. It was widely available after the war and helped introduce aviation to the general public. curvic coupling (turbine engine component). A type of coupling used to join a series of axial-flow compressor disks or axial turbine wheels to each other. The coupler consists of a series of radial, gear-like teeth on the faces of two mating flanges. Curvic couplings provide a positive engagement with no slippage. cusp. A pointed end. customer bleed air (gas turbine engine). Air bled from one of the stages of the engine compressor and used for some function other than the operation of the engine. These functions include pressurization, deicing, anti-icing, air conditioning, and engine starting. cutaway drawing (mechanical drawing). A drawing which shows the inside construction or contents of an object, as well as the outside of the object. A part of the outside of the object is cut away to show the inside. cutoff. The point in which a system ceases to operate because a defined cutoff condition has been reached. cutout switch (electrical component). A switch inside a piece of electrical equipment that opens the circuit when a certain operating condition is reached. cut threads. Threads that have been formed on a rod by removing part of the metal with a cutting tool. Cut threads are different from rolled threads, which have been formed on a rod by rolling the rod between grooved dies. cutting fluid (machine tool operation). A fluid, often an emulsion of oil and water, poured over a metal while it is being drilled or turned on a lathe. Cutting fluid carries away some of the heat caused by friction, lubricates the surface being cut, prevents rust, and flushes chips away from the cutting edge of the tool. cutting plane (mechanical drawing). A line on a mechanical drawing used to indicate the location from which an auxiliary view is made. cutting speed (machine tools). The speed of the relative motion between a cutting tool and the work being cut. It is important that the correct cutting speed be used when cutting or drilling metal to get the smoothest cut and the longest life of the cutting or drilling tool. |
