Study on the geometrical properties and working resistance performance of bionic bulldozing plate?

In order to reduce the working resistance of bulldozing plates, this paper explores the basic methods of introducing bionic soil-engaging surface with excellent resistance-reducing performance into the design of bulldozing plates. The influence law of the intrinsic geometric parameters on the working resistance of the bulldozing plate is preliminary analyzed. Three forms of model bulldozing plate were designed and manufactured. Their macroscopic soil-engaging surface directrixes consist of bionic curve, and the cutting angle was 50°, 55°and 60°respectively. The working resistance was measured by a homemade indoor soil bin. The bionic bulldozing plate model with a cutting angle of 55° has the least working resistance. The parametric equations of three kinds of macroscopic soil-engaging surface of bionic bulldozing plate were established by processing the fitted equations. The intrinsic geometrical quantities of the macroscopic soil-engaging, including the first base quantity (E, F & G) and the second base quantity (L, M & N), were got by calculating the fitted equations. Compared with the working resistance test results of the three bulldozing plate models, it is found that there is probably a better range of E value in first base quantities and L value in second base quantities which can make the soil-engaging surface to obtain lower resistance. The change rate of E value in first base quantities and L value in second base quantities can also make the soil-engaging surface to obtain lower resistance. Whether E value or L value is too large or too small, working resistance of bionic bulldozing plate will increase. This research provides a reference for the resistance-reducing and energy-saving design of macroscopic soil-engaging surface of bulldozing plate, and a basis for developing the soil tillage dynamics with the differential geometry theory of surface.