混砂机是铸造生产中的关键设备,保证混砂机在一定周期内连续运转是使生产正常进行的必要条件。由于混砂机碾轮轴承是在恶劣的环境中工作,原密封防尘装置不能有效地阻止型砂、粘土和煤粉中的小颗粒进入轴承工作腔内,破坏了轴承的良好工作条件,轴承迅速破坏,无法正常运转。气力防尘的原理(图1)是将压缩空气,通过分水滤气器,经过调压阀和胶管进入气体导入阀(图2),然后将干净的压缩空气通过两个管口,经过胶管接入到碾轮曲柄、心轴或只经过心轴一端进入心轴中心孔道,从心轴径向小孔到内侧轴承的外腔,通过密封装置而外溢, Sand mixer is the key equipment in the casting production, to ensure that the sand mixer in a certain period of continuous operation is to make the normal production of the necessary conditions. As the mixer mill wheel bearings work in harsh environments, the original seal dustproof device can not effectively prevent the sand, clay and pulverized coal particles into the bearing work chamber, undermining the bearing good working conditions, the bearings quickly Destroyed, unable to work properly. Pneumatic dustproof principle (Figure 1) is the compressed air through the water separator, through the pressure regulator and hose into the gas inlet valve (Figure 2), then the clean compressed air through the two nozzles through the hose Access to the wheel crank, mandrel or mandrel through only one end into the mandrel center hole, the mandrel from the radial hole to the inner bore of the bearing inside, through the sealing device and spill,