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A steam explosion equipment with double self-tight sealing structure was designed in this paper. A steam explosion equipment including a explosion tank and a buffer tank. Material of the steam explosion equipment is S30408. The saturated steam pressure of explosion tank and buffer tank is 1.45MPa and 0.4MPa, respectively. Thermal-structural coupling analysis on the steam explosion equipment based on ANSYS Workbench software, the distribution of stress is obtained, and the maximum stress is 163.98MPa. Thermal-structural coupling analysis on the elliptical head and the feed inlet cylinder connection regions, and get the curve of maximum stress varies with different chamfering. Considering the maximum stress and the manufacturing cost to determine the connection regions' chamfering is 20mm, and the maximum stress is 132.06MPa. Fatigue analysis on the steam explosion equipment with chamfering of 20mm, the permission cycle times of steam explosion equipment is 1.19 × 10⁵.

The unbalanced blade carrier shaft leads to mill Vibration, and affects crushing effects. Study on SG-4390 plastic crusher blade carrier shaft was conducted, the experiment of blade carrier shaft balancing test was done by hard-bearing balancing machine, and the balance level had reached 95.4%. Besides, ANSYS Workbench analysis was done for the tested blade carrier shaft. The results showed the crushing effect is significantly improved, including the blade carrier shaft dynamic characteristic. By the way, the paper provides a reference for crusher similar mill structure optimization.