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目前,我国出产各型号混砂机辗轮轴承端盖防尘都是采用端盖与轴之间充填毛毡来密封,(图1),这种密封适用于干燥、低尘工作环境,而在高粉尘、潮湿的恶劣工作环境,其防尘效果不佳。辗轮轴承易进入粉尘而磨损,导致轴承磨损主要原因是:①混砂机加料是自上往下加、在加料过程中,由于混砂机辗轮在转动,必然有一些粉尘,细砂掉在辗轮防尘盖与轴垂直交接地方,这地方正好是辗轮轴承端盖密封处,经辗轮长期运转与震动,一部分粉尘逐渐进入辗轮轴承;②由于密封填料采用毛毡,而毛毡不耐腐蚀,加上工作环境十分潮
At present, China produced various models of sand mill roller bearings dust cover are used between the end cap and shaft filled with felt to seal, (Figure 1), this seal is suitable for dry, low dust work environment, and in the high Dust, damp and harsh working environment, the dust effect is not good. Roller bearing easy to enter the dust and wear, resulting in bearing wear are mainly due to: ① Mixer feeding is added from the top down, in the feeding process, as the sand mill wheel rotation, there must be some dust, fine sand off Roller wheel dust cover and the shaft perpendicular to the place of handover, this place is exactly the roller bearing cover seal, long-term operation and vibration by the rolling wheel, a part of the dust gradually into the roller bearing; ② sealing filler with felt, and felt is not Corrosion resistance, coupled with the working environment is very tide