The invention discloses an
energy recovery system of a
hybrid power single-pump multi-implementation-element
engineering machine. The
energy recovery system mainly comprises a planetary gear mechanism, a variable pump, an engine, a proportion direction valve, a variable motor, a
fuel tank, a
signal control unit, a
rectifier /
inverter, a variable frequency motor, a super-
capacitor and the like. The
signal control unit obtains a
control signal from a control
handle and a
pressure sensor, sends out a control command to the engine, the variable pump, the proportion direction valve, an electromagnetic reversal valve, the
rectifier /
inverter, and the variable motor so as to control the position of the
throttle position of the engine, the
discharge capacity of the variable pump, the valve core displacement of the proportion direction valve, the work
station of the electromagnetic reversal valve, the rotating speed of the variable frequency motor, and the
discharge capacity of the variable motor, and therefore controls the action of the
fuel tank. After the invention uses the planetary gear mechanism, a
hybrid power
system and the
energy recovery system share one variable frequency motor, thereby reducing the installation space, and can recover the energy directly, thereby improving the
recovery efficiency of the energy
recovery system.