【摘要】 采煤机滚筒在工况确定情况下,直径一般是给定的,但转动惯量是可以调整的。通过改变滚筒的筒毂和叶片厚度来增大滚筒的转动惯量,使滚筒起到飞轮的作用,贮存能量,稳定转速,降低机器的振动。并利用LabVIEW平台和数据采集卡,在质量和转动惯量增量已知的情况下,对振幅的变化进行量化,测试出转动惯量对振幅的影响。结果表明,当转动惯量约增大11%时,振幅最大可减小9%;当转动惯量约增大23%时,振幅最大只减小约11%。以此作为改变和叶片尺寸,减小采煤机滚筒振动的依据,可对滚筒进行综合设计,从而保证持采煤机工作的稳定性。更多还原

【Abstract】 When the coal mining machine is working,the diameter of the roller is generally given,but its mass-moment of inertia is adjustable.By changing the thickness of the tube hub and the blade,the mass-moment of inertia of the roller will increase and the roller can store energy just like a flying wheel,maintain the stable rotation,and reduce the vibration of the machine.Using the LabVIEW platform and the data acquisition card,the change of the vibration amplitude was quantified with the known mass and the increment of the mass-moment of inertia of the roller.The influence of the mass-moment of inertia on the amplitude was tested.It was found that when the moment of inertia is increased by 11 %,the amplitude can be reduced by 9 %;and when the mass-moment of inertia is increased by 23 %,the amplitude can be reduced by 11 %.This finding may have practical significance in the roller’s design for maintaining the stability of coal mining machine’s operation.更多还原