| 摘要 |
There is disclosed a vibratory screening apparatus 10 comprising a frame having a pair of opposed screen frame sides 11, a multi-deck screen 12 mounted on the frame sides 11, and a shaft-driven vibratory mechanism coupled with the screen 12 in order to impart vibration energy thereto so as to assist the screening operation, in which the vibratory mechanism comprises: a pair of stubshafts 14 associated one with each of the frame sides 11 and being spaced apart from each other, a respective counterweight 17 mounted on each stubshaft 14 in the space between the housings 15, 16 and which is rotatable with the stubshaft to apply vibration energy to the stubshaft and therefrom to the screen 12 via the bearing housings 15, 16 and the frame sides 11, and drive means 20 coupled with each stubshaft and arranged to be driven in synchronism to apply synchronous rotary motion to each stubshaft.
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