真空压风分配装置是选煤厂过滤机的一个重要组成部分，PG（116）－2.7型过滤机在我国选煤厂有着广泛的应用，其真空压风分配装置的结构如图1所示。其结构为主轴组件与分配头体直接接触，扇形块与分配头体活动固定结合。其结构存在的缺点有，分配头体直接接触磨损快，分配头易磨 Vacuum pressure distribution device is an important part of the coal preparation plant filter. PG (116) -2.7 filter has a wide range of applications in China’s coal preparation plant, the structure of the vacuum air distribution device shown in Figure 1. The structure is that the main shaft assembly is in direct contact with the distribution head body, and the sector block is fixedly combined with the distribution head body. The shortcomings of its structure, the distribution head body direct contact with wear fast, easy to wear distribution head