The greatest characteristic of electric variable displacement pump is that it can
realize the automatic matching of energy and ballistic conditions. The greatest
disadvantage is that it still needs too much power supply and battery mass. As for
working time is a controversial issue, some foreign experts believe that it is not
generally suitable for tactical missiles with short working time. The key is that with
the solution of miniaturization, high-performance chemical batteries or thermal
batteries, missiles for short working time are entirely possible.
System mass/kg
Output power
(
0.735kW)
Working hours /s
Fig. 9.33 Working area of hydraulic system. A—Gas turbocharged accumulator; B—Gas turbine
quantitative pump; C—Battery motor variable pump; D—Gas motor variable pump
Electric Pump Unit
Battery
Electric
machinery
Variable
pump
Oil filter
Unidirectional valve
Safety valve
Gas-liquid
accumulator
Servo valve
Gas booster
tank
Electric Explosion Valve
Helium cylinder
Fig. 9.34 Hydraulic system block diagram of battery electric variable displacement pump for
American patriot air defense missile
114
9 High-Temperature and High-Speed Gas Turbine Pump …