The invention discloses a
hybrid power engineering mechanical accumulator-
hydraulic motor energy recovery system. The
system mainly comprises an engine, a variable pump, variable frequency motors, a variable motor, a
signal control unit, an accumulator and a hydraulic implementation element, and the like. In the
system, the variable motor is coaxially connected with a variable frequency motor M2 and forms a composite
energy recovery system with the accumulator so as to recover the
gravitational potential energy and braking energy in the lowering process of an implementation mechanism. The variable pump, the engine and a variable frequency motor M1 are coaxially connected; a
hybrid power system which consists of the engine and the variable frequency motor M1 drives the hydraulic implementation mechanism to rise and lift heavy objects together with the accumulator. The system overcomes the defects that the variable motor-power generator
energy recovery system responds slowly and the
specific energy of the accumulator is low, enhances the dynamic response performance of the energy
recovery system, improves the working conditions of power generation of an
electric generator, and simultaneously can directly recover part of
potential energy by the accumulator, thus raising the energy
recovery efficiency of the system.