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摘 要 我國目前原煤的破碎一般采用錘式破碎機或齒輥式破碎機。錘式破碎機是以高速運動的錘頭打擊物料，在破碎腔內(nèi)受到相互破碎沖擊和剪切，可控性很差，容易產(chǎn)生過粉碎，而且對入料度有限制，不適合煤炭的粗、中碎作業(yè)。而齒輥式破碎機是在齒的作用下對物料進行劈碎，破碎后的物料直接排出，因此破碎粒度比較均勻。目前的雙齒輥破碎機由于整體結(jié)構(gòu)的不合理和破碎齒磨損快不能修復等原因，使用效果大大降低甚至很差。2PGC—450×500新型雙齒輥破碎機是在吸取國內(nèi)外先進技術(shù)的基礎(chǔ)上研制和設(shè)計出來的高強力破碎機，很有發(fā)展前景和市場前景。 關(guān)鍵詞： 雙齒輥破碎機，破碎機，產(chǎn)品粒度 Abstract My current coal was broken generally using hammer-Breakers or teeth roller-Breakers. Hammer-Breakers is the dead against high velocity materials in the shattered debris impact and sheared by mutual broken, controllability poor had to smash easily, but there are restrictions on the Liaodu not suitable for coal rough, Chinese broken operations. And teeth roller-Breakers teeth in the role of materials returned broken, the broken material directly emit, broken granularity more evenly. The current two-tooth roller Breakers and the overall structure of the irrational can not repair broken teeth wear faster reasons, the use of significantly reduced or even poor. 2PGC-450 x 500-double teeth roller Breakers in lessons and on the basis of advanced technology and designed to develop high-strong Breakers, a development prospects and market prospects. Keyword：Double toothed roll crusher,Roll crusher,Product grain size II