Fig.5 represent the slider displace

Fig.5 represent the slider displacement-velocity curves obtained by reciprocating motion of slider-crank mechanism when connecting rod length was 115 mm, 120 mm, 125 mm and 130 mm. In Fig.5, from point a to point b through point c was the extending stroke of the slider-crank mechanism, at which time the slider reached the maximum displacement. From point b to point a through point c’ was the return stroke of the slider-crank mechanism, and the slider returned to the initial position. Using the displacement of the slider in the Fig.5 to obtain the instantaneous speed of conical hopper into water. The variation of the speed of hopper entering water with the connecting rod length was plotted in Fig.6. It could be obtained from Fig.6 that at the same speed, the instantaneous speed of the conical hopper into water declined as the connecting rod length increased, because the longer the connecting rod length, the longer the transmission path, the greater the energy consumed. In order to ensure that the slider-crank mechanism has a larger transmission angle and lower energy consumption, and the overall size of the slider-crank mechanism cannot be too large at the same time, the length of the connecting rod was 120 mm. The parameters of the crank-slider mechanism were initially determined as follows: stroke s=160 mm, crank length a=80 mm, connecting rod length b=120 mm, γmin = 45 °, extreme angle θ=0 °.