| 摘要 |
PROBLEM TO BE SOLVED: To provide a crusher and its crushed powder ingression prevention structure capable of preventing a crushed powder from entering a bearing side. SOLUTION: The crushed powder ingression prevention structure 50A is provided between a crushing blade 20 and a bearing 30A inside a through hole 16A in a body casing of the crusher. The crushed powder ingression prevention structure 50A includes a side plate 52 that closely contacts a crushing blade face 20A and rotates together with a pivot point 18, a seal ring 70 that closely contacts both the side plate 52 and an inner circumferential surface of the through hole 16A and a rotation stopper pin 38 that prevents a seal support 80, an O-ring 90, a seal ring press 92, and the seal ring 70 from being rotated. The seal ring press 92 is fastened, the seal ring 70 is closely contacted with the side plate 52 by an elastic force of the O-ring 90, further, the seal ring 70 is thermally expanded to block a clearance between its outer circumferential surface 70A and the inner circumferential surface of the through hole 16A, thereby preventing the ingression of a crushed powder into the bearing 30A side. COPYRIGHT: (C)2010,JPO&INPIT |
