| 小孔节流静压气体球轴承自激振动现象的研究 |
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| 引用本文： | 郭良斌,王祖温. 小孔节流静压气体球轴承自激振动现象的研究[J]. 机床与液压, 2006, 0(8): 66-68 |
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| 作者姓名： | 郭良斌 王祖温 |
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| 作者单位： | 武汉科技大学城建学院,武汉,430070;大连海事大学机电与材料工程学院,大连,116026 |
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| 基金项目： | 国家自然科学基金;武汉科技大学校科研和教改项目 |
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| 摘 要： | 分析了单供气孔小孔节流静压气体球轴承在不同供气压力下的动态刚度和阻尼特性，及轴承发生自激振动的频率范围。结果表明，承载质量一气膜系统是一个强非线性的振动系统，系统的动态参数随着扰动频率及工作点的变化而变化。从能量传输的角度看，气膜负阻尼可以理解为气膜非定常力对于承载质量在振动一个周期内作正功，使物体振动加剧，最终产生气锤自激振动。
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| 关 键 词： | 静压气体球轴承 小孔节流 气锤自激 |
| 文章编号： | 1001-3881(2006)8-066-3 |
| 收稿时间： | 2005-11-14 |
| 修稿时间： | 2005-11-14 |
Study on Pneumatic Hammer in Externally Pressurized Spherical Gas Bearings with Single Orifice Compensation |
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| GUO Liangbin,WANG Zuwen. Study on Pneumatic Hammer in Externally Pressurized Spherical Gas Bearings with Single Orifice Compensation[J]. Machine Tool & Hydraulics, 2006, 0(8): 66-68 |
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| Authors: | GUO Liangbin WANG Zuwen |
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| Affiliation: | 1. College of Urban Construction, Wuhan University of Science and Technology, Wuhan Hubei 430070, China; 2. Electromechanies and Materials Engineering College, Dalian Maritime University, Dalian Liaoning 116026, China |
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| Abstract: | Dynamic stiffness and damping of externally - pressurized spherical gas - lubricated bearing with single orifice compensation were analyzed in different supply pressure. Vibration frequency of the present gas bearing was confirmed. The mechanism system consist of load mass and gas film is a strong nonlinear vibration system. Parameters of the system will be changed along with variety of operation point and perturbation frequency. From the point of view of energy transmission, negative damping of the gas film can be apprehended that non - stationary force of gas film made positive power to oscillation mass in an oscillation cycle. Amplitude of vibration is augmented and pneumatic hammer is occurred subsequently. |
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| Keywords: | Externally pressurized gas bearing Orifice compensation Pneumatic hammer |
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