The Study Of The Key Parts And Key Components Of The Field Straw Chopper Work With Film Collecting Machine

The mulch film airslaked seriously and its strength is very weak, which cause hard to recollect mulch film. Now it has become serious White Pollution .Many people think hard to solve the film pollution. One of the most important methods is machine recollecting film. With the back of the researching, the key spare parts and key parts of the Field Straw Chopper Work with Film Collect Machine (FSCWF) have been studied. which is the important mission in this thesis. Summary as follows.The FSCWF easily draws up the mulch film,smashes and throws it to the fields together with straw. In order to solve the problem, CFD was used to imitate the windy fields of the FSCWF. Preliminary research results indicate: 80mm cotton stubs can effectively reduce the adsorption of mulch film, reduction of the knife handles width can decrease the intensity of the wind so that less mulch film are absorbed obviously, and properly enlarging the gaps S1(S2)or the h1(h2), the wind near the ground can be reduced, which is helpful to lower the film adsorption by wind.The 3-D model of FSCWF was established, and its mass-center was also calculated by UG software. Then, the method of equivalence mass-center was used to simplify the machine model. FEA indicated that suspension frame has not enough strength surpluses, and there was stress concentration in corners. When the frame was improved, the max-stress was reduced 29.1﹪and the max-deform was reduced 64.3﹪.Then the stress was tested by the instrument of measuring stress, which is supplement of FEA.After studying the main facture affecting leaking roots, affecting cutting depth and remaining soil on films, then we defined the rather good compose of cutting depth, of smash soil angle and machine speed. On other hand, we studied the array of tooth, the machine speed and the space of tooth, which affected leaking film. With this study we defined their rather good compose.