The paper determines the rational range of a new spiral rotary drum's rotation speed through theoretically analyzing the critical speed of the drum in a coal machine.
通过对采煤机新型变升角螺旋滚筒极限转速的理论分析,确定了该种新型螺旋滚筒转速的合理范围。
2
The shaft extension should be maintained at a safe range in order to avoid criticalspeed at rotor bending modes.
为了避免转子超越弯曲模态的临界转速,转子轴伸长度应控制在安全范围内。
3
The hematite can be better dispersed with the increase of stirring speed in a range, but the dispersion becomes worse when the stirring speed exceed a critical value.