| abstract |
The present invention provides a kind of fork truck energy saving system with speed-regulating function, including double acting motor generator, double-acting pump motor, seal-off pressure oil tank, liquid-controlled oil supplement valve, bidirectional hydraulic locking-valve, elevating ram, safety valve, three-phase bridge type converter energizes energy storage device, control device, fuel tank；Double-acting pump motor is connected with double acting motor generator；Double acting motor generator is connected with three-phase bridge type converter；Three-phase bridge type converter is connected with energy supply energy storage device；Control device controls three-phase bridge type converter and energizes the working condition of energy storage device；The oil discharge outlet and inlet port of double-acting pump motor are connected with liquid-controlled oil supplement valve；Liquid-controlled oil supplement valve is connected with bidirectional hydraulic locking-valve, and bidirectional hydraulic locking-valve is connected with elevating ram rod chamber and rodless cavity；Elevating ram rod chamber and rodless cavity are connected with safety valve.The potential energy recovery system of the present invention is by controlling double acting motor generator rotational speed regulation pallet fork decrease speed, hydraulic circuit restriction loss is eliminated, hydraulic pressure heating of oil is reduced, improves potential energy organic efficiency, and system hardware and software is simple and reliable, it can be achieved that degree is high. |