1992 Volume 54 Issue 4 Pages 39-47
The purpose of this paper is to develop a machine to break subsoil mechanically and to clarify parameters which affect fundamental design.
This paper describes the effect of rotary tiller for chisel type subsoiler and the effect of chisel type subsoiler for rotary subsoil breaker.
As a result, it was found that the rotary blades reduced the soil failure resistance of the chisel type subsoiler. C-shaped blades reduced the soil failure resistance of the chisel type subsoiler more than straight blades. The travel reduction of tractor declined when rotary speed was lower, since it made rotary pitch longer.
When the chisel type subsoiler was removed from the machine, the working depth was only 0.1m, because the chain case of the machine prevented from going deep. In this working depth, rotary torque and rotary power were not influenced by the chisel type subsoiler. As the disturbed area of soil decreased when the chisel type subsoiler was removed, both of soil specific torque and specific work increased. Therefore, it is necessary for this trial machine to attach the chisel type subsoiler in order to break subsoil.
