| 释义 |
piston
 pistonin an internal-combustion enginepis·ton P0332100 (pĭs′tən)n.1. A solid cylinder or disk that fits snugly into a larger cylinder and moves under fluid pressure, as in a reciprocating engine, or displaces or compresses fluids, as in pumps and compressors.2. Music A valve mechanism in brass instruments for altering the pitch.
[French, from Italian pistone, pestone, large pestle, from pestare, to pound, crush, from Late Latin pistāre, frequentative of Latin pīnsere, pīnsāre.]piston (ˈpɪstən) n (Automotive Engineering) a disc or cylindrical part that slides to and fro in a hollow cylinder. In an internal-combustion engine it is forced to move by the expanding gases in the cylinder head and is attached by a pivoted connecting rod to a crankshaft or flywheel, thus converting reciprocating motion into rotation[C18: via French from Old Italian pistone, from pistare to pound, grind, from Latin pinsere to crush, beat]pis•ton (ˈpɪs tən)
n. 1. a disk or solid cylinder moving within a longer cylinder and exerting pressure on, or receiving pressure from, a fluid or gas. 2. a pumplike valve used to change the pitch in a cornet or the like. [1695–1705; < French < Italian pistone piston, a learned alter. of pestone large pestle =pest(are) to pound (variant of Medieval Latin pistare, derivative of Latin pīstus, past participle of pīnsere to pound) + -one augmentative suffix] Pis•ton (ˈpɪs tən)
n. Walter, 1894–1976, U.S. composer. ![]() pistonThe fuel-air mixture in the left-hand chamber expands when ignited by the spark plug, pushing the piston down and turning the shaft to which it is attached. The turning shaft drives the piston in the right-hand cylinder upward. It will then be pushed down in the same way when the fuel-air mixture enters that chamber and is ignited. The alternating action of the two pistons keeps the shaft turning.pis·ton (pĭs′tən) A solid cylinder or disk that fits snugly into a hollow cylinder and moves back and forth under the pressure of a fluid, as in many engines, or moves or compresses a fluid, as in a pump or compressor.Thesaurus| Noun | 1. | Piston - United States neoclassical composer (1894-1976)Walter Piston | | 2. | piston - mechanical device that has a plunging or thrusting motionplungermechanical device - mechanism consisting of a device that works on mechanical principlespiston ring - seal consisting of a split metal ring that seals the gap between a piston and the cylinder wallpiston rod - connecting rod that moves or is moved by a pistonreciprocating engine - an internal-combustion engine in which the crankshaft is turned by pistons moving up and down in cylinders |
Translationspiston (ˈpistən) noun (in engines, pumps etc) a round piece usually of metal that fits inside a cylinder and moves up and down or backwards and forwards inside it. 活塞 活塞
piston
piston a disc or cylindrical part that slides to and fro in a hollow cylinder. In an internal-combustion engine it is forced to move by the expanding gases in the cylinder head and is attached by a pivoted connecting rod to a crankshaft or flywheel, thus converting reciprocating motion into rotation Piston the moving component of a reciprocating engine that is fitted to the internal surface of a cylinder and moves back and forth along the direction of the cylinder’s axis. In engines, power cylinders, and presses, the piston transmits the pressure of a working fluid—gas, vapor, or liquid—to the moving parts. In some types of engines, such as two-cycle internal-combustion engines, the piston also plays a role in the gas distribution process. In pumps and compressors, the suction, compression, and delivery of the liquid or gas are accomplished by the reciprocating piston. A piston may be of the trunk, disk, or plunger type, depending on the piston’s length-to-diameter ratio and on the piston’s design. The trunk piston, whose length is somewhat greater than its diameter, has a head, grooves for piston rings, and a guide skirt. The height of a disk piston is determined only by the size of the sealing device; the rod on which the piston is mounted serves to align the piston. The plunger piston, whether a plunger, ram, or pin, usually operates with a smooth surface; its length is several times greater than its diameter. In rotary-piston internal-combustion engines, a rotor performs the functions of a piston in transmitting the pressure of a working fluid to the moving parts. piston[′pis·tən] (electromagnetism) A sliding metal cylinder used in waveguides and cavities for tuning purposes or for reflecting essentially all of the incident energy. Also known as plunger; waveguide plunger. (engineering) force plug (mechanical engineering) A sliding metal cylinder that reciprocates in a tubular housing, either moving against or moved by fluid pressure. piston A sliding plug in an actuating cylinder that converts pressure into force and then into work. In reciprocating engines, a piston compresses the fuel-air mixture and transmits force from expanding gases in the cylinder to the crankshaft.PISTON
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Piston
Synonyms for Pistonnoun United States neoclassical composer (1894-1976)Synonymsnoun mechanical device that has a plunging or thrusting motionSynonymsRelated Words- mechanical device
- piston ring
- piston rod
- reciprocating engine
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