浮环轴承环速比的试验研究

Experimental Research on Ring Speed Ratio of Floating Ring Bearings

在浮环转子轴承系统静、动力学分析中,环速比是影响功耗、温升及转子轴承系统的稳定性和可靠性的重要指标。以水作为润滑介质,在工作转速1 000~10 000 r/min,载荷为45、75 N工况下,实验测量浮环轴承浮环的转速和环速比,并研究浮环转速和环速比随主轴转速的变化趋势。实验结果表明:浮环轴承能有效减小轴颈与轴瓦之间的相对速度,环速比与工作转速之间呈非线性关系;在重载工况下环速比随着主轴转速的升高快速下降,有进一步优化设计的需要,以维持环速比稳定,而在轻载工况下环速比随着主轴转速的升高而上升,说明浮环轴承更适合于高速轻载的场合。

The ring speed ratio of floating ring bearing is an important performance index which affects the power con- sumption and temperature rise,and the stability and reliability of the rotor bearing system.An experiment was designed to measure the floating ring speed and ring speed ratio of the floating ring bearing, with water as lubricant and under the shaft speed ranges between 1 000 r/rain to 10 000 r/min,the load of 45 N and 75 N respectively.The effects of shaft speed on the floating ring speed and ring speed ratio were investigated.The experimental results show that floating ring bearing can effectively reduce the relative speed between the journal and the bearing, and there is nonlinear relationship between ring speed ratio and shaft speed.Under the heavy static load condition, the ring speed ratio is decreased rapidly with the increasing of shaft speed,which indicates there is a need for further optimization to maintain a stable ring speed ratio.Under the light static load condition, the ring speed ratio is increased with the inereasirig of shaft speed, which indicates the floating ring bearing is more suitable for using at high speed light load condition.