液压与气压系统中英文对照

Hydraulic System ------ 液压与气压系统【中英文对照】

Hydraulic System

There are only three basic methods of transmitting

power : Electrical , mechanical . and fluid power . Most applications actually use

a com

b in atio n

of the three methods to obta in the most efficie nt

overall

system . To properly determine which principle method to use 。it is important to know the salient features of each type . For example , fluid systems call tran smit power

more econo mically Over greater dista nces tha n Can mecha ni cal

types . However 。fluid systems are

restricted to shorter distances than are electrical

4. The medium , which is a liquid

,provides rigid

transmission

system .

Hydraulic power tran smissi on system ale concerned with the generation.

modulation, and control of pressure and flow and ,and in general such systems

in clude: 1. Pumps which convert available power from the prime mover to hydraulic power at the actuator 2. Valves which con trol the direct ion of pump--flow , the level of power produced , and the amount of fluid ———— flow to the actuators . The power level is determ ined by con troll ing both the flow and pressure level . 3. Actuators which convert hydraulic power

Output at the point required .

to usable mechanical power as well as 1ubricati on of

component s , sealing

in valves

and cooling

of the

systems .

and control

5. Connectors which link the various con ductors

for the fluid un der pressure tan k(reservoir)

. .

system components , provide power

,and fluid flow return to

potential difference between the tool and the work piece is sufficiently high, a tran sie nt spark discharges through the fluid, remov ing a very small amount of metal from the workpiece surface.

The capacitor discharge is repeated at rates of between 50,with voltages

usually ranging between 50vand 380v and currents from 0.1A to 500A.

Mechanical control

includes cams and governors. Although they have been

used for the control of very complex machines, to be cost effectively, today they are used for simple and fixed-cycle task control. Someautomated machines, such as screw

mach in es, still use cam-based con trol. Mecha ni cal con trol

is

the closely fitt ing

moving parts of pn eumatic

tech no logy of hydraulics2

of the metal has been eroded away, leaving a small crater.

The basic EDM system con sists of a shape tool and the workpiece, conn ected to a dc power supply and placed in a dielectric fluid this is one of the most widely

6、Fluid storage

and con diti oning equipment which ensure sufficient

quality and qua ntity

as well as cooli ng

of the

fluid

7、pneumatics

systems required a lubricator to inject 。a very fine mist of

oil into the

air discharging from the pressure

regulator

This prevents wear of

Hydraulic systems ale used in in dustrial

applicati ons such as stamping

presses , steel mills , and general manufacturing ,agricultural

machines , mining in dustry , aviati on , space tech no logy , deep —sea exploratio n. tran sportatio n

,

mari ne tech no logy , and offshore gas and petroleum explorati on

.In short , very

few people get through a day of their 1ives

without somehow benefiting

from the

The prin ciple of electrical-discharge machining also called electro is or spark-erosion machining, is based on the erosion of metals by spark discharges. We know that whe n two curre nt-c on duct in wires are allowed to touch each other, an arc is produced. If we look closely

at the point

of con tact betwee n

the two

wires, we note that a small portion

used mach ining

processes, particularly

for die-sinking operations when the