Design method of drag reduction with equal strength of soil subsoiling shovel handle

Abstract

The invention relates to a design method for reducing resistance of a soil subsoiling shovel handle and belongs to the field of agricultural machines. Currently, according to the shovel design mainly based on an experience analogy, people do not pay attention to the fact that the thickness (a soil facing surface) of the shovel handle is larger than the width of the shovel handle in influence on resistance, the conventional strength design is tedious, and therefore the equal-strength thinning and widening resistance reduction design method for the shovel handle is disclosed. A mature shovel handle which is suitable for local places and not limited in structural form is selected as a sample. The thickness of the shovel handle is reduced by 5mm-10mm, and the reduced thickness serves as a newly designed shovel thickness a. Without regard to a safety coefficient and an accurate stress value, according to existing experience or documents, approximate assignment is performed on Fx and Fy, the principle that a newly designed shovel handle and the sample shovel handle are equal in dangerous section strength is adopted for performing finite element analysis or theoretical calculation according to Fx, the width b of the dangerous section AB of the new shovel handle is designed, and according to the Fy, strength checking is performed on the dangerous section of the new shovel handle. Then according to the equal strength principle, widths of all points in L length below the AB section of the new shovel handle are designed.

Description

technical field [0001] The invention relates to a drag reduction design method for soil subsoiling, which belongs to the field of agricultural machinery, and specifically relates to a drag reduction design method for soil subsoiling shovel handles to be thinned and widened. Background technique [0002] Whether it is conventional tillage or conservation tillage, it is a common fact that the plow layer becomes shallower and the hardness of the plow bottom soil increases. Therefore, subsoiling is an important factor to improve the comprehensive production capacity of the land. However, the problem of excessive soil loosening resistance has been perplexing researchers in the field of agricultural machinery. [0003] At present, the research on soil deep loosening to reduce resistance and consumption mainly includes: contact surface material modification method, flexible structure method, fluid injection lubrication method, heating method, vibration method, electroosmosis method...

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Problems solved by technology

[0005] In addition, if the conventional design method is strictly followed, there are certain difficulties in the accurate force value of the subsoiler shovel, the selection of the safety factor, etc., and the strength check needs to be carried out after the design. Existing product high

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