Servo energy saving transformation method of hydraulic press machine - Leica energy saving
Hydraulic press machine working principle
The motor drives the oil pump to rotate. The pump draws oil from the oil pump and converts the mechanical energy into the pressure energy of the hydraulic oil. The hydraulic oil is adjusted by the hydraulic valve through the integrated block (or valve combination), and the direction, pressure and flow are adjusted and transmitted through the external pipeline. In the hydraulic cylinder or oil motor, it controls the change of the direction of the hydraulic motor, the magnitude of the force and the speed of the speed, and promotes the work of various hydraulic machines.
Hydraulic press machine energy saving principle
The pressure closed-loop control system consists of the control system and the sensor system automatically adjusts the motor speed to stabilize the oil pressure in the energy storage tank within the set value fluctuation range for constant pressure control. The feedback pressure is compared with the set pressure, and the dedicated control software controls the synchronous output of the controller in real time to adjust the motor speed so that the oil pressure in the energy storage tank is stabilized at the set pressure.
And it can ensure that when the cylinder stops loading for a long time during the working process, the sensor system will detect that the current pressure exceeds the target set value. At this time, the controller will control the motor to be in the low speed running state to ensure the current energy storage tank pressure demand. Save energy under the premise.
Hydraulic press transformation advantages
1. Precision Due to the double closed-loop control of flow and pressure, the motor speed and torque can be quickly adjusted to achieve continuous and precise control of the flow and pressure output of the oil pump, greatly improving the repeatability of the hydraulic press.
2. High efficiency The instantaneous overload capability of the motor and the oil pump can be utilized. The fast response characteristics significantly improve the dynamic response characteristics of the system, thereby shortening the empty cycle time, energy storage time, and rapid pressure rise. The pressure and flow response time are within 50 MS, and the pressure is ±1 Bar.
3. Energy saving Hydraulic power can be provided according to the requirements of the production process of the equipment, and the energy saving effect can obviously reach 40%~80% of the power saving rate.
