ELECTROHYDRAULIC CONTROL SYSTEM Russian patent published in 2003 - IPC

FIELD: mechanical engineering; metallurgy. SUBSTANCE: proposed system is designed to control processing equipment of self-propelled vehicles used in dispensing of anode mass and other components at electrolysis production of aluminum and it can be used for dispensing of loose materials in other branches of industry. System contains unit of distributing sections in number corresponding to number of operating mechanisms, control panel whose outputs are connected to control inputs of corresponding distributing sections whose outputs are coupled with corresponding operating mechanisms, variable-capacity pump with electrohydraulic regulator whose output is connected with pressure main lines of distributing sections and its suction space and drain main line of distributing sections are connected with tank. It contains also pressure transmitter and control unit. According to invention, control unit is made in form of control signal shaper including switches in number corresponding to number of operating mechanisms whose inputs are connected to corresponding outputs of control panel. Output of one of them is connected to control input of corresponding distributing section directly, and output of the other is coupled with control input of corresponding distributing section through outer member with transfer ratio K₁,. Output of third switch is connected through member with transfer ratio K₂ to first non inverting input of summer whose second inverting input is connected with output of newly introduced speed meter, and output, with control input of following distributing section. Integrator is provided whose input is connected with corresponding output of control panel and output is connected through comparators to control inputs of switches, and member with variable transfer ratio whose output is connected to first noninverting input of summer, second inverting input of summer being connected with output of pressure transmitter, and output is connected to control input of pump electrohydraulic regulator, and control inputs of member are connected to corresponding outputs of control panel. EFFECT: improved operating characteristics of control system. 1 dwg