The Typical Inertial Force Balancing Analysis For The GY-105 Harvester Mechanisms And The Corresponding Method Of Virtual Experiment

After accomplishing the optimum design of the partial inertial equilibrium of a cutter mechanism, a virtual experiment method by means of redeveloping software Creo2.0 is described in this paper.By calculating the inertial force of the harvester screening mechanism, the function of the virtual experiment methodis further verified.Although the methods for complete-balance-design of mechanism inertial force have been developed to machines, for some special configuration, complete-balance cannot be achieved by adding balanced weights to machines. Therefore, trying reducing the inertia force by the optimal design has practical engineering significance. In addition, complete-balance method also has a shortcoming, such that the counterweights would be too big to have wide range of utility. In this case, taking into account the inertial force and the total mass of the machine body, the optimization method can be utilized to replace the complete-balance-method.The above two features have been fully applied to the design of a model of a small combine harvester for mountain area. On the one hand, the special cutter mechanism, makes it impossible achieve complete balance of inertial forces; on the other hand, a compact model for hill district usage of combine harvesters is limited by the muddy acclimated depth, thus being very sensitive to the weight, and being not suitable for great counterweight. As a result, the existing complete-balance-theory cannot be used to the kinetic synthesis of this mechanism. The overall optimization design, belonging to the idea of partial equilibrium, can be taken into account.Upon completing the balance design of mechanism inertial force, independent verification is needed. Because the simulation functions of existing three-dimensional design software are insufficient, the total mechanism inertial force cannot be directly obtained. In this paper,The D’Alembert principle is used by means of redeveloping Creo2.0 simulation function, to propose a virtual experiment method which can directly acquire mechanism inertia forces. Taking the cutter and screen mechanisms on the combine harvester as examples, the theoretical calculations of the total inertia forces and virtual experiments have been done respectively. The results of both calculations agree well with the corresponding experiments, which proves feasibility, correctness and the practical value of the virtual experiment method in the mechanical design.