棉秆对夹拉拔试验台设计与试验

Abstract

In order to explore the relationship between displacement-pulling force and the change of clamping force during the clamping and pulling process of cotton stalks in the field by different types of clamps, a test bench for cotton stalks clamping and pulling was designed. Based on the combination of virtual instrument technology and external hardware, the device is programmed by Gx Works2 and LabVIEW programming software to complete the operation of the test bench clamping and pulling device and the measurement and acquisition of information. From the mapping of the collected information, the average value of the maximum uplift force on the cotton stalks was 500 N, corresponding to an upward movement of 12 mm at the root of the cotton stalks. Through the collected information the effect of two types of clamps on cotton stalks clamping and pulling was analyzed, rigid splints with the clamping force of 750 N and a linear speed of 0.18m/s having the best effect on the cotton stalks clamping and pulling. Rubber splints have the best effect on cotton stalks clamping and pulling when the clamping force is 500 N and the linear speed is 0.36 m/s. Among them, the striped rubber splint has the best effect. The collected information was subjected to analysis of variance (ANOVA), and the results showed that the coefficient of friction of the clamping plate showed a high influence on both the pull-up force and the reduction of clamping force. Based on the obtained results, it can provide a reference for the design of clamping type cotton stalk harvesting machinery.