求翻译：摘要：螺旋分级机广泛应用于磨矿分级系统，其下部支座一般采用滚动轴承式，因其长期浸没在矿浆之中，随着分级机主轴的转动和矿浆的不断冲刷，很容易导致密封失效，致使轴承损坏，其使用寿命一般只有3个月左右，经过改造用橡胶轴承式下部支座代替轴承式下部支座，使用寿命有很大提高。是什么意思？

Abstract: spiral classifier is widely used in grinding and classification system, the lower part of the rolling bearing type commonly used, because of its long-term immersion in the slurry being, with the grading machine spindle rotation and the continuous slurry erosion, can easily lead to seal fai

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Abstract: The spiral sorting machine widely applies in the rubbing hierarchy system, its lower part support uses the rolling bearing type generally, because its long-term immerse in the pulp, along with the sorting machine main axle rotation and the pulp unceasing washout, very easy to cause the sea

Summary: spiral classification machine widely application Yu mill mine classification system, its lower bearing General used rolling bearing type, due to its long-term immersion in pulp among, as classification machine spindle of rotation and pulp of constantly scour, is easy led seal failure, cause

Abstract: The spiral sorting machine widely applies in the rubbing hierarchy system, its lower part support uses the rolling bearing type generally, because its long-term immerse in the pulp, along with the sorting machine main axle rotation and the pulp unceasing washout, very easy to cause the sea