高压往复泵的特点--中英文翻译

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外文资料

High-handed intercourse pump characteristic

High pressure between 100 MPa moving back and forth responding to

like pump sigmatism pressure in 10 MPa . It belongs to volume dyadic

pump , the purpose drawing support from volume inside the cavity

working coming to reach transportation liquid cyclicity change; The

prime mover mechanical energy can by that the pump changes into the

pressure transporting liquid's directly; Only, the pump capacities

depend on job cavity volume changing value and their change number of

times within unit time , have nothing to do with to discharging

pressure theoretically. The pump moving back and forth is to be

backed by the piston advance and return movement within liquid jar

job cavity (or passing the flexibility component cyclicity within the

cavity working such as baffle , bellows makes job cavity volume

produce cyclicity change's coming elastic-deformation). Pump on

structure, moving back and forth, Whose characteristic is summed up

as follows:

Microtime rate of flow is systolic.

This is in the pump because of being moving back and forth, and

liquid medium sucking in discharging process being to be in progress

alternately, and the piston can't be in field change ceaseless in

displacement process middle , whose speed among. In the pump only

having a cavity working, not only the pump microtime rate of flow

vary with with time, and be discontinuous. With job cavity increasing

by, microtime rate of flow pulsation extent is more and more small,

and even pragmatic upper not bad regard as to stabilize a stream.

Average rate of flow is constant

Theoretically, the pump rate of flow depends on main pump structure

physics , chemical property independences such as parameter n (every

minute intercourse number of times) , S (piston travel) , D (piston

diameter) , Z (piston number) , the temperature , viscosity with the

independence discharging pressure, and with transporting medium only.

Therefore saying a pump's, rate of flow is constant.

The pump pressure depends on pipeline characteristic property

Unable pressure been to depend on a pump unit because the pump sets a

limit for per se, pipeline characteristic property, has nothing to do

with rate of flow pump snapout moving back and forth moreover. Just

say, if thinking that transporting liquid is incompressible,in terms

of theory think that pump moving back and forth's discharge pressure

will not accept any restricting , be OK to discharge pressure

according to the pump unit pipeline characteristic property , the

what any needs building a pump. The capital of pump moving back and

forth natural , all the regulation discharging pressure's having a

pump , this is not that pressure can not rise again, but say only

because of prime mover fixed power and the pump saying the snapout

that a pump self structure intensity restricting, do not allow being

put into use under exceeding this once discharging pressure but self

own.

Have stronger adaptability to transporting medium

The pump moving back and forth can transport any medium , physics

function and chemistry function restricting hardly accepting medium

in principle. Certainly, since hydraulic whole course of restricts as

well as material and the manufacturing engineering sealing off a

technology's, also may come across the condition being able to not

fit in with sometimes.

Have fine self attracts a function.

The pump moving back and forth has fine sucking in not only function,

and there are still fine self attracts a function. Have no need of

irrigation pump therefore , to the pump moving back and forth most,

generally before starting.

Machine efficiency height , energy conservation.

High-handed intercourse pump rate of flow

The pump theory rate of flow: Qt = AsnZ

Style is hit by Qt pump theory rate of flow; A bar piston (or section

of piston) area; S route or distance of travel; The n crank shaft

rotation rate (or the bar piston every minute intercourse number of

times) Z unites a number (bar piston or piston number)

Actual pump rate of flow: Q = Qt－Q.

Style is hit by Q pump rate of flow; Qt pump theory rate of flow; The

pump rate of flow loses Q.

The factor that the rate of flow bringing about a pump loses has: The

volume bringing about since liquid compresses or expands is lost; The

volume bringing about since the valve lags when being closed down is

lost; Since the valve closes the day afer tomorrow do not lose

strictly, by sealing off the volume that leakage soft and floury

brings about; The volume by the fact that the bar piston , piston rod

or the piston ring leakage bring about is lost.

The pump microtime rate of flow

Single cylinder Shan effect pump rate of flow curve:

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摘要：

外文资料High-handedintercoursepumpcharacteristicHighpressurebetween100MPamovingbackandforthrespondingtolikepumpsigmatismpressurein10MPa.Itbelongstovolumedyadicpump,thepurposedrawingsupportfromvolumeinsidethecavityworkingcomingtoreachtransportationliquidcyclicitychange;Theprimemovermechanicalenergycanbyt...

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