1、外文资料High-handed intercourse pump characteristicHigh pressure between 100 moving back and forth responding to like pump sign pressure in 10. It belongs to volume dyadic pump, the purpose drawing support from volume inside the cavity working coming to reach transportation liquid cyclically change; The
2、 prime mover mechanical energy can by that the pump changes into the pressure transporting liquids 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
3、 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 cyclically within the cavity working such as baffle, bellows makes job cavity volume produce cyclically changes coming elastic-deformation). Pump on str
4、ucture, moving back and forth，whose characteristic is summed up as follows: Micro time rate of flow is systolicThis 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 cant be in field change ceas
5、eless in displacement process middle, whose speed among. In the pump only having a cavity working, not only the pump micro time rate of flow with time, and be discontinuous. With job cavity increasing by, micro time rate of flow pulsation extent is more and more small, and even pragmatic upper not b
6、ad regard as to stabilize a stream.Average rate of flow is constantTheoretically, the pump rate of flow depends on main pump structure physics, chemical property independences such as parameter(every minute intercourse number of times)，(piston travel) , (piston diameter) , (piston number) , the temp
7、erature, viscosity with the independence discharging pressure, and with transporting medium only. Therefore saying a pumps, rate of flow is constant.The pump pressure depends on pipeline characteristic propertyUnable pressure been to depend on a pump unit because the pump sets a limit for per se, pi
8、peline characteristic property, has nothing to do with rate of flow pump snap out moving back and forth moreover. Just say, if thinking that transporting liquid is incompressible，in terms of theory think that pump moving back and forths discharge pressure will not accept any restricting , be OK to d
9、ischarge 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 pressures having a pump，this is not that pressure can not rise again, but say only because of prime mo
10、ver fixed power and the pump saying the snap out 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 mediumThe pump moving back and forth can transport any medium, phy
11、sics 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 technologys, also may come across the condition being able to not fit in with sometimes.Have
12、 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 conser
13、vation.High-handed intercourse pump rate of flowThe pump theory rate of flow: Style is hit by pump theory rate of flow; bar piston (or section of piston) area; route or distance of travel; the crank shaft rotation rate (or the bar piston every minute intercourse number of times) unites a number (bar
14、 piston or piston number)Actual pump rate of flow，.Style is hit by pump rate of flow; pump theory rate of flow; the pump rate of flow loses.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 abou
15、t since the valve lags when being closed down is lost; Since the valve closes the day after 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 pu
16、mp micro time rate of flowSingle cylinder Shan effect pump rate of flow curve: Three jar Shan effects pumps rate of flow is the single cylinder Shan effect pump rate of flow overlying on three phasesWhose curve as follows:The pump powerThe pump effective power: The energy that the inner, the liquid being discharged by the pump gain time the unit from the pump is called an effective power.In style, the effective power, satisf
