高压往复泵的特点--中英文翻译
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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外文资料High-handedintercoursepumpcharacteristicHighpressurebetween100MPamovingbackandforthrespondingtolikepumpsigmatismpressurein10MPa.Itbelongstovolumedyadicpump,thepurposedrawingsupportfromvolumeinsidethecavityworkingcomingtoreachtransportationliquidcyclicitychange;Theprimemovermechanicalenergycanbyt...
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作者：闻远设计
分类：课程设计课件资料
价格：15光币
属性：9 页
大小：124.5KB
格式：DOC
时间：2023-09-29
