Constant power control method for coal mining machine and operating handle

Abstract

The invention relates to a power control method for a coal mining machine based on touch technology of a magneto-rheological valve and a complete operating handle device. The method is realized by the following steps: (1) extracting output current signals of a cutting motor in a coal mining machine set, and sending the output current signals to a control computer; (2) processing the output current signals in the control computer, and converting the output current signals into control signals through D / A conversion to adjust a current controller; (3) using the output current of the current controller to adjust the current of magnet exciting coils in a magneto-rheological device; (4) setting an operating handle and a moving piston in the magneto-rheological device into fixed connection and synchronous movement to form a state that an operator directly feels the change of the output power in the coal mining machine set during resistance change by means of the operating handle; and (5) quickly adjusting the output power of a pulling motor in the coal mining machine set by means of the pushing and pulling operations of the operating handle so as to stabilize a constant power working state of the coal mining machine set.

Description

technical field [0001] The invention relates to a constant power control method of a coal shearer and a matching operating handle, in particular to a constant power control method of a coal shearer based on the tactile technology of magneto-rheological fluid and an operating handle that can realize rapid online regulation by means of the tactile technology. Background technique [0002] With the rapid development of the energy industry, the power of the shearer has grown from tens of kilowatts to more than 2,000 kilowatts at present. In order to achieve energy saving and high efficiency, the electric motor in the coal mining unit should be kept running at the rated power for a long time, and the electric motor power must be automatically controlled to reduce the overload or underload of the electric motor. In the current coal mining unit, the output of the constant rated power of the cutting electrode is realized by adjusting the traction speed. During mining, the driver set...

AI Technical Summary

Problems solved by technology

In practical applications, due to the complexity of the coal seam, the difference in the operator's operating level and response speed, and the harshness of the environment where the coal mining unit is located, the smoke, dust, and soap affect the driver's field of vision, resulting in the inability to timely adjust the power of the cutting motor. Changes make quick traction speed adjustments

Long-term overload increases the aging of key control components, resulting in frequent failures and low equipment efficiency

Images