Lifting Motion Optimum Design of Airborne Single-boom Jumbolter

With stress analysis of the drilling arm of the airborne single-boom jumbolter,the normal stress of the expansion beam was least during the working course when the pin joint was located at the lap position of inner beam and outer beam.At the same time,with the working dimension and stress analysis of the hoist cylinder,the means of calculating the working stroke and the cylinder diameter of the hoist cylinder was put forward which was the lectotype laws of the hoist cylinder.