Roll shaft with shaft center cooling system and double roller compaction granulator using roll shaft

The invention discloses a roll shaft having a shaft center cooling system and a double roller compaction granulator using the roll shaft. The roll shaft cooling device includes a roll shaft main body,a cooling water pipe and a return water pipe. The inside of the roll shaft main body is provided with a central cooling hole, which is respectively communicated with the cooling water pipe and the return water pipe. Cooling water is injected into the central cooling hole through the cooling water pipe to cool the roll shaft main body; and the cooling water for cooling the roll shaft main body isdischarged through the return water pipe. The technical problem that materials adhere to the surface of the roll shaft due to the temperature rise of the roll shaft surface during the operation of thedouble roller compaction granulator is solved. 本申请公开了种具有轴心冷却系统的辊轴及采用该辊轴的对辊造粒机。该辊轴冷却装置包括辊轴主体、冷却水管和回水管，所述辊轴主体的内部开设有中心冷却孔，所述中心冷却孔分别与冷却水管和回水管连通，通过所述冷却水管向所述中心冷却孔内注入冷却水对所述辊轴主体进行降温；通过所述回水管对所述辊轴主体进行降温后的冷却水对外排出。本申请解决了对辊造粒机工作过程中由于辊轴表面温度