Design and testing of a soft clamp wheel type sweet potato transplanter
Addressing the high injury and missing rates associated with bare-root sweet potato seedlings,a design imitating manual transplanting was developed based on the low injury and missing rates achievable by human labor.This design included a seedling press wheel and a soft clamp seedling supply device.By analyzing the trajectory projection of manual transplanting,the curvature radius was extracted to determine the radius of the seedling press wheel.A force analysis on the seedling press teeth led to the derivation of the dimensions of the teeth and the reinforcing ribs.The spacing between the two soft clamps in the seedling supply device was analyzed,and a suitable range for this parameter was determined.Through multi-factor experimental optimization of structural parameters,the optimal operating parameters were as follows:an operating speed of 0.7 m·s-1,a sweet potato seedling exposure length of 11 cm,and the distance of 220 mm between the two soft clamps.After the completion of the overall design of the soft clamp seedling supply type sweet potato transplanter,verification tests were conducted.The results indicated that when the transplanter moved forward at a speed of 0.7 m·s-1,it could achieve a seedling injury rate of 2.11%and a seedling omission rate of 2.22%,meeting the requirements for mechanical sweet potato transplantation.This transplanter employed an innovative rotary mechanism for transplantation,which could provide a reference for the design and optimization of sweet potato transplanters.
NETL
NSTL
万方数据
