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    振動篩的精度知識雜談
    作者:    發布日期:2017-08-09      關注次數:355     二維碼分享

        皮帶式振動篩和失重式振動篩是當今使用最多的兩種振動篩類型。由于它們的工作原理不同,使它們各自的給料精度影響因素也不盡相同。在稱量皮帶給料工藝中,當材料進入給料機時,材料可形成大致均勻的料床,然后被輸送且要通過一個剪切閘門。當薄薄一層材料快速通過振動段時,給料機就檢測到了材料的重量。根據檢測到的重量,皮帶速度能夠連續不斷地自動進行調整,這樣排出的物料重量就可以始終處于可控狀態中。與此相比,在失重給料方法中,整個給料機、料斗中的材料和排出材料都連續不斷地被振動,使給料機的輸出速率(給料系統失去重量的速率)被精確控制,以達到理想的給料速率。 

        因為失重式給料機的機械結構簡單,人們很少擔心給料精度的問題。但是,在皮帶式給料機的應用中,給料精度可能會受到稱量臺錯位的影響。具體來說,就是直接處于振動臺上游的固定料臺與稱量臺本身的錯位會造成給料速率的意外增加或減少。另外,任何與皮帶牽引力、張緊力或清潔度有關的因素都會造成給料速率的錯誤。因此,在設備選型過程中和在編制任何維修保養計劃時,都應該對上述系統的可靠性和運行有效性進行評估。 

    篩分精度達不到的情況總結如下:

        1.篩網的篩孔堵塞 (要增加防堵塞裝置)

        2.投進振動篩的物料水分過大(粘度大,適當經過烘干后投入振動篩)

        3.振動篩篩面給料不均(增加物料分流器) 

        4.振動篩篩面上料層過厚 (增加物料分流器,控制投料量) 

    解決方法: 

        1.經常要減輕輕振動篩負荷及清理振動篩篩網 

        2.改變篩箱傾角 

        3.調解振動篩的給料量

        4.張緊篩網,拉近傳動皮帶

                                                                                                                                        新鄉市東漢機械有限公司


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