“pump”的概念、定义、翻译、参考文献-科学参考

pump

Physics

A device that imparts energy to a fluid in order to move it from one place or level to another or to raise its pressure (compare vacuum pump). Centrifugal pumps and turbines have rotating impellers, which increase the velocity of the fluid, part of the energy so acquired by the fluid then being converted to pressure energy. Displacement pumps act directly on the fluid, forcing it to flow against a pressure. They include piston, plunger, gear, screw, and cam pumps. See also electromagnetic pump.

Chemistry

A device that imparts energy to a fluid in order to move it from one place or level to another or to raise its pressure (compare vacuum pump). Centrifugal pumps and turbines have rotating impellers, which increase the velocity of the fluid, part of the energy so acquired by the fluid then being converted to pressure energy. Displacement pumps act directly on the fluid, forcing it to flow against a pressure. They include piston, plunger, gear, screw, and cam pumps.

Chemical Engineering

A mechanical device used to transport a fluid from one place or level to another by imparting energy to the fluid. The three broad groupings are reciprocating, rotary, and (p. 305) centrifugal-type pumps. The most commonly used pump is the centrifugal type, which has a rotating impeller used to increase the velocity of the fluid and where part of the energy is converted to pressure energy. Rotary and reciprocating pumps are positive displacement pumps in which portions of fluid are moved in the pump between the teeth of gears, and by the action of a piston in a cylinder, respectively. There are many variations of these types and each has a particular application and suitability for a fluid in terms of its properties, required flow rate, and delivery pressure. Pumps that do not conform to these groupings include acid eggs, air-lift pumps, and steam ejectors. All involve the use of energy to transport the fluid.

Electronics and Electrical Engineering

See parametric amplifier.

Geology and Earth Sciences

A device for moving liquids by adding to the pressure existing within them. For example, a centrifugal pump first increases the velocity of the fluid by the use of impellers; this velocity increase is then converted to an increase in pressure by the use of appropriately orientated guide vanes or the use of a volute casing. Other pump types include multistage turbine pumps, jet pumps, positive-displacement pumps, and suction lifts.

单词	pump
释义	pump Physics A device that imparts energy to a fluid in order to move it from one place or level to another or to raise its pressure (compare vacuum pump). Centrifugal pumps and turbines have rotating impellers, which increase the velocity of the fluid, part of the energy so acquired by the fluid then being converted to pressure energy. Displacement pumps act directly on the fluid, forcing it to flow against a pressure. They include piston, plunger, gear, screw, and cam pumps. See also electromagnetic pump. Chemistry A device that imparts energy to a fluid in order to move it from one place or level to another or to raise its pressure (compare vacuum pump). Centrifugal pumps and turbines have rotating impellers, which increase the velocity of the fluid, part of the energy so acquired by the fluid then being converted to pressure energy. Displacement pumps act directly on the fluid, forcing it to flow against a pressure. They include piston, plunger, gear, screw, and cam pumps. Chemical Engineering A mechanical device used to transport a fluid from one place or level to another by imparting energy to the fluid. The three broad groupings are reciprocating, rotary, and (p. 305) centrifugal-type pumps. The most commonly used pump is the centrifugal type, which has a rotating impeller used to increase the velocity of the fluid and where part of the energy is converted to pressure energy. Rotary and reciprocating pumps are positive displacement pumps in which portions of fluid are moved in the pump between the teeth of gears, and by the action of a piston in a cylinder, respectively. There are many variations of these types and each has a particular application and suitability for a fluid in terms of its properties, required flow rate, and delivery pressure. Pumps that do not conform to these groupings include acid eggs, air-lift pumps, and steam ejectors. All involve the use of energy to transport the fluid. Electronics and Electrical Engineering See parametric amplifier. Geology and Earth Sciences A device for moving liquids by adding to the pressure existing within them. For example, a centrifugal pump first increases the velocity of the fluid by the use of impellers; this velocity increase is then converted to an increase in pressure by the use of appropriately orientated guide vanes or the use of a volute casing. Other pump types include multistage turbine pumps, jet pumps, positive-displacement pumps, and suction lifts.
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