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农业机械技术状态随使用时间的增加而逐渐恶化。农业机械技术状态恶化,主要表现在:工作质量降低,能量消耗增加,以及工作可靠性下降。一、恶化原因1.机器零件因机械摩擦、热腐蚀、化学蚀损等原因,使尺寸、形状和表面质量发生变化。2.由于机器各运动着的零件,不断受交变载荷、振动和应力集中的影响,使零件表层小块剥落或断裂。
The technical status of agricultural machinery gradually deteriorates with the increase of usage time. The deterioration of the technical status of agricultural machinery, mainly manifested in: lower quality of work, increased energy consumption, and the decline in work reliability. First, the deterioration of 1. Machine parts due to mechanical friction, hot corrosion, chemical erosion and other reasons, the size, shape and surface quality changes. 2. Due to the movement of the machine parts, continue to be subject to alternating load, vibration and stress concentration, so that the surface of small pieces of peel or fracture.