Control method for actively preventing bucket rod from sucking air

The invention relates to the technical field of engineering machinery, and discloses a control method for actively preventing a bucket rod from sucking air, which comprises the following steps of: 1, acquiring system pressure to obtain a change trend of a pressure value; 2, according to the obtained change trend of the system pressure value, whether the bucket rod oil cylinder sucks air or not is judged; 3, determining the initial opening percentage of a bucket rod valve element according to the air suction problem of the bucket rod oil cylinder at each gear; if the bucket rod oil cylinder does not suck air, the bucket rod valve element is completely opened; 4, according to the control performance requirements of all gears, the complete opening time of the valve element is determined; and fifthly, the set opening mode of the bucket rod valve element is matched with all the gears, and self-adaptive control over the gears and the opening mode of the valve element is achieved. The device has the beneficial effec