摘要 |
PURPOSE:To scrape off effectively films or solid materials formed in an inner body and prevent the load on the blade side from increasing by facing a sharp edge section of a blade mounted at the end of the blade mounted on a rotor toward the rotating direction of the rotor. CONSTITUTION:A first arm 104 of a blade 101 mounted on the mount 102 installed in the axial direction of a rotor 12 is connected with a second arm 106 pivotably through a shaft 105, and an tip 107 is fixed at the top of the blade. The end of the blade 107 is provided with a sharp edge section 107a which is faced toward the rotating direction of the rotor 12. Its edge angle thetais 45 deg. or less and the edge 107a is inclined more in the rotating direction that the line running through the center of the rotor 12 and the shaft 105. By said arrangement, the edge of the blade can scrape off solid materials adhered to a wall 2 more effectively than the blades heretofore available. |