Abstract
In order to solve the problem of mechanical direct seeding of rice seeds on the exposed soil surface, which is affected by bird and mouse damage, rain and sun exposure, etc., a pendulum-type synchronous soil-covered rice direct seeding machine was developed. In order to clarify the leakage and anti-entanglement performance of the mulching plate, linear function type, quadratic function type and exponential function of the sliding blade mulching plate were designed, and the mulching plate structure, straw distribution spacing and suspension rotation speed were used as independent variables. Using straw entanglement rate and straw interference rate as evaluation indicators, a full-factor experimental study was carried out to determine the optimal structure of the mulching plate; a pendulum-type synchronous soil covering live broadcast EDEM simulation model was established, and field experiments were conducted to verify its synchronous soil covering performance. The test results show that the exponential function of the sliding blade mulching plate has the best performance, and the soil covering rate of the three soil covering plate structures is 87.37~98.54 under the conditions of forward speed 0.6~1.0 m/s and suspension rotation speed 90~150 r/min. %, the covering soil thickness is 5.08~5.84 mm. This research can provide reference for rice mechanical direct seeding technology and equipment.
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