一、概况卧轴强制式混凝土搅拌机,自1983年JD200混凝土搅拌机首次研制成功并通过部级鉴定以来,发展速度很快,经两年多的实践,用户对单、双卧轴搅拌机逐渐有所了解和认识,反映良好,在某些工程中已显示了其优越性。卧轴强制式搅拌机之所以取得较好效果的原因之一,就是搅拌轴轴端密封这一技术关键已得到解决。国外西德埃尔巴公司(ELBA)生产单卧轴强制式砼搅拌机历史最长。过去搅拌机搅拌轴轴端密封,采用填料式压紧密封(见图1),以石棉盘根做密封填料,当砂 I. Overview Horizontal axis forced concrete mixer. Since 1983, the first time JD200 concrete mixer was successfully developed and passed the ministerial level appraisal, the development speed is very fast. After more than two years of practice, the user gradually understands the single and twin shaft mixers. And understanding, reflecting well, has shown its superiority in some projects. One of the reasons why the horizontal shaft forced mixer achieves better results is that the technical key to the shaft end seal of the agitator shaft has been solved. The West El Erba company (ELBA) has the longest history of production of single-shaft forced smash mixers. In the past, the agitator shaft was sealed at the shaft end, and a packed compression seal was used (see Fig. 1). Asbestos packing was used as the seal packing when sand was used.