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液压系统的外文文献翻

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    • 1、JINGCHU UNIVERSITY OF TECHNOLOGY毕业设计(论文)外文文献翻译译文题目 Hydraulic System 专 业机械设计制造及其自动化 班 级 09机制一班 姓 名 汪康 学 号 2009403010107 指导教师 王霞 机械工程学院Hydraulic SystemThere are only three basic methods of transmitting power:Electrical,mechanicaland fluid powerMost applications actually use a combination of the three methods to obtain the most efficient overall systemTo properly determine which principle method to use。it is important to know the salient features of each typeFor example,fluid systems call transmit

      2、power more economically Over greater distances than Can mechanical typesHowever。fluid systems are restricted to shorter distances than are electrical systems Hydraulic transmission there are many outstanding advantages, it is widely used, such as general industrial use of plastics processing machinery, the pressure of machinery, machine tools, etc.; operating machinery engineering machinery, construction machinery, agricultural machinery, automobiles, etc.; iron and steel industry metallurgical

      3、machinery, lifting equipment, such as roller adjustment device; civil water projects with flood control and dam gate devices, bed lifts installations, bridges and other manipulation of institutions; speed turbine power plant installations, nuclear power plants, etc.; ship from the deck heavy machinery (winch), the bow doors, bulkhead valve, stern thruster, etc.; special antenna technology giant with control devices, measurement buoys, movements such as rotating stage; military-industrial control

      4、 devices used in artillery, ship anti- rolling devices, aircraft simulation, aircraft retractable landing gear and rudder control devices and other devices.The role of the hydraulic system to increase the force by changing the pressure. A hydraulic system is good or bad depends on the system design is reasonable, the merits of the performance system components, system, pollution prevention and treatment, while the last point is particularly important. In recent years, Chinas domestic hydraulic t

      5、echnology has greatly improved, not simply using hydraulic technology from abroad for processing. A complete hydraulic system consists of five parts, namely, power components, the implementation of components, control components, auxiliary components (Annex) and the hydraulic oil. The role of dynamic components is the original motivation of the mechanical energy into fluid pressure energy, the hydraulic system of pumps, which provide power to the entire hydraulic system. Structures of hydraulic

      6、pumps generally have gear pumps, vane pumps and piston pumps.Implementation of components (such as hydraulic cylinders and hydraulic motors) is to pressure the liquid can be converted to mechanical energy to drive the load for a linear reciprocating movement or rotational movement.Control components in the hydraulic system control and regulation of fluid pressure, flow and direction. According to the different control functions, hydraulic valves can be divided into pressure control valves, flow

      7、control valves and directional control valve. Pressure control valve is divided into benefits flow valve (safety valve), pressure relief valve, sequence valve, pressure switch, etc.; flow control valves including throttle, adjusting valves, flow diversion valve assembly; Directional control valve includes a check valve, check valve, shuttle valve, valve and so on. Under the control of different ways, hydraulic valves can be divided into switching control valves, control valves and the fixed valu

      8、e proportional control valve. Auxiliary components, including fuel tanks, filters, tubing and pipe joints, seals, quick couplings, high pressure ball valve, hose assembly, pressure fittings, pressure gauge, oil level, oil temperature meter and so on. Hydraulic system of hydraulic oil is the work of the energy transfer medium, a variety of mineral oil, emulsion, oil hydraulic molding Hop categoriesThe role of the hydraulic system is to help humanity work. Mainly by the implementation of component

      9、s to rotate or pressure into a reciprocating motion. Hydraulic principle :It consists of two cylinders of different sizes and composition of fluid in the fluid full of water or oil. Water is called hydraulic press; the said oil filled hydraulic machine. Each of the two liquid a sliding piston, if the increase in the small piston on the pressure of a certain value, according to Pascals law, small piston to the pressure of the pressure through the liquid passed to the large piston, piston top will go a long way to go. Based cross-sectional area of the small piston is S1, plus a small piston in the downward pressure on the F1. Thus, a small piston on the liquid pressure to P = F1/SI, Can be the same size in all directions to the transmission of liquid. By the large piston is also equivalen

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