Research Of Effect On Operational Performance Of Structure And Motion Parameters Of The Rotary Tiller

Rotary is a tillage machinery which has a wide range of application in both South and North. Under the conditions of dry and wet, rotary cultivator is widely used, it can simultaneously complete tillage operations in once time, and the field can reach to broadcast state, which effectively reduces the number of times for tractor working. But in the process of its development, there are some problems affecting the working performance of rotary cultivator, therefore, it is valuable for us to do some study about its operating power consumption and operation quality, and these will have far-reaching significance.In this paper, the main effect of structure and motion parameters of the rotary cultivator on its performance are studied. The 3D model drawing of frame parts of test bed is figured by using Solid-works, the test platform of driving parts and working parts carries on the analysis computation, eventually we determined the whole structure and the main parameters of the test bench, and made the completion of the production test stand. The finite element modal analysis of the test frame was done and a modal analysis was set in ANSYS-Workbench. The results of ANSYS analysis obtained the first six order natural frequency and vibration type drawing frame, we analyze the frame structure of the vibration generated by deformation such as bend and torsion fatigue which may cause damage to the related parts, or even the fracture problems, and we found the weakest parts of the frame is the U type welding.The construction of trajectory equations of motion for rotary parts figured out the synthetic and decomposition for velocity of the moving point. It focus on the analysis of each part of the rotary cultivator power component, and the mathematical model of each power consumption is established, finally it finished the determination of the mathematical model of the total power consumption. On the basic of the constraint conditions of rotary tiller blade penetration, force balance of slice piece, rotary speed ratio, rotary speed, it determined that the machine forward speed range is 1.494km/h~4.485km/h, spindle speed range is 250r/min~300r/min, and the selected testing machine speed range is 2km/h~4km/h, the spindle speed range is 249r/min~299r/min, and all these can meet the requirements of normal work, farming and the agronomy.The operation object of rotary is the typical black loam, we measured and calculated the power consumption, soil crushing ratio and deep tillage qualified in the tested pointed of each tested area according to the requirements, and made a intuitive analysis for the two index of power consumption and soil crushing rate. The results indicates that the main power source is the rotary cultivator torque, and the traction power occupies only a very small part and the variation is smoother, the C point in each measuring zone has the best soil crushing rate, while points A and E measurement are the worst.The optimum parameters combination of tests is that when the speed is 2km/h, the spindle rotating speed is 299r/min, and adopts the combined arrangement by range analysis and comprehensive balance method, the equipment can get the best operation performance. The response surface of single index with speed and rotating speed of cutter shaft have been established, and the analysis of the interaction between multiple factors and the single index were carried out based on the response surface. The analysis result is that: the arrangement of the blades were fixed, under the condition that speed in minimum value and the spindle rotating speed in maximum value, the index can get the best value. On the basic of the relationship between power consumption, soil crushing rate, deep tillage qualified rate and different test factors, the regression calculation is finally got by using data analysis software, the final regression polynomial equation contains multiple factors and different indexes, and it has verified the accuracy of the optimal scheme.The results of this paper provide theoretical basis and reference for the power consumption and the quality of work in the future study of rotary cultivator, it also pointed out the future direction of the development of rotary cultivator and research priorities, and it could have certain practical value and reference value.