As we all know, the crusher is widely used in mining, metallurgy, building materials, road, railway, water conservancy and chemical industry and many other sectors. Common crushing machine arewinnowing mill, roll crusher, crusher compound. with a crushing ratio, uniform particle size, which having simple structure, reliable operation, easy maintenance, operating costs and economic these characteristics. PF-I series impact crusher can process materials side length is 100 to 500 mm, the compressive strength is up to 350 MPa, great crushing ratio, cubic particles advantages of material was broken; PF-II series impact crusher machine, which is suitable for crushing hard materials, such as cement limestone crusher, it have the discharging size is small this advantage. It is understood that the grading crusher during the improvement program, through the structure analysis of the tooth roller bearing parts. The parts have been improved, and the improved content of the improved structure forms are as follows: (1) tubing connector is mounted on the bearing cap Bu, instead of bearing housing, so that the Division to effectively solve the problems of poor bearing lubrication grease can not fully enter the bearing cavity. (2) the original bearing sleeve are designed into two parts (bearing and labyrinth ring housing) with fastening bolt.

The mounted to the tooth roll shaft bearings; simply labyrinth ring and seal ring installed in place, and then the bearing sleeve and bearing simultaneously heated and mounted to the tooth roller grafito y to avoid aging of the seals during heating problem, extended seal life ring. (3) reduce the maximum outside diameter of the seal, leave sufficient space for maintenance. Easy installation and removal tool, when the bearing is damaged, podemos demode the bearing housing. And then dismantle the bolt bearing sleeve bearing cover, demolition works demolition bearing replacement can unload damage STI. Increased bearing maintainability. (4) the ring of the puzzle palace processing an oil outlet can solve the problem of bearings after a long run cause the bearing cavity pressure within, and filled with grease so that at the labyrinth seal. The labyrinth seal more reliably, can effectively increase the life of the seals and bearings, PLC controlled automatic lubrication system timing. Do not worry about the maze 2 holes on the oil port of excessive fuel. After the improvement to the tooth roller shaft member, current during use, the bearing and seal damage accidents are significantly reduced, while reducing the daily amount of maintenance to the grading crusher (one kind of mining equipment).