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辽宁70—2单体播种机,作业时刷种轮胶圈磨损太快.1979年6月在黑山县励家公社,播种丹玉六号玉米,只用半天时间,10个新胶圈就有8个被磨成2～3毫米深的沟痕而报废.胶圈表面磨成深沟以后,不仅降低了刷种性能,同时由于胶圈外缘与排种壳体的间隙增大(见右图),而造成漏种和克种,影响排种质量.原机刷种轮与排种壳体间的装配位置是固定的,由于零件的制造误差积累,胶圈外缘与排种壳体的间
Liaoning 70-2 single seeder, brushing rubber whetstone wear too fast operation in June 1979 in Li Shan County Lijia commune, Dan D Liu corn planting, only half a day, there are 10 new apron 8 were ground into 2 to 3 mm deep groove marks and scrapped.After the rubber ring surface grinding into a deep groove, not only reduces the brushing performance, at the same time as the rubber ring rim and seeding shell gap increased (see right Figure), and cause leakage and grams of species, affect the quality of rowing. The original machine brush seed wheel and shell housing assembly position is fixed, due to the accumulation of parts manufacturing error, Between