【作者】 王换斌；

【导师】 秦泗吉；

【作者基本信息】 燕山大学 ， 材料加工工程， 2012， 硕士

【摘要】 机械压力机生产效率高、成形精度高，是先进的成形设备，作为大型机械压力机关键零部件的动压油膜轴承，其合理设计是保证整机可靠运行、减少维护的技术关键。目前针对低速重载动压油膜轴承的研究一般限于轧机设备，用于机械压力机的相关研究工作与其在实际生产中的应用程度相比较少，这方面的研究对提高压力机的设计制造水平，延长使用寿命、减少修复有重要的实际意义。针对“齐二机床”生产的2500吨大型多工位压力机动压油膜轴承进行应力、变形分析，对轴瓦强度、刚度作出评估；对轴承油膜压力、温度分布进行仿真，对轴承运行情况作出评估；最后试验验证轴承油膜温度模拟的正确性。介绍了2500吨多工位压力机主体的主要零部件，建立了主体模型，采用有限元软件进行了静力学仿真，得到各轴瓦在压机均载与偏载时的应力、变形分布，经过分析，各轴瓦强度、刚度满足使用要求，各偏心轴倾斜量在0.11mm左右，轴承支承精度良好。改变轴瓦厚度，对轴瓦强度、刚度、支承精度影响很小。在载荷反向位置对轴瓦开油槽，对轴瓦强度、刚度基本无影响。对2500吨压机动压油膜轴承中的油膜进行了流场分析，得到压力分布、温度分布，油膜最大压力98.3MPa，最高温度57.2℃，轴承运行情况良好。分析了转速、相对间隙、供油压力对压力分布、温度分布、承载力的影响。根据相似理论确定了试验轴承，并对试验轴承进行了仿真。对试验轴承进行了试验，测出了温度。模拟结果与试验结果基本吻合，间接验证了压机油膜轴承温度模拟分析的可信度。更多还原

【Abstract】 Mechanical presses, which have high production efficiency and high formingprecision, are advanced forming equipments. As the key parts of large mechanical presses,the hydrodynamic oil film bearings are very important. Their reasonable designs are keytechnologys which ensure that the mechanical presses operate reliably and reducemaintenance. At present, the researches on hydrodynamic oil film bearings with low speedand heavy load are generally limited to the rolling mill. Compared to their applications inthe actual production, researches on hydrodynamic oil film bearings applied onmechanical presses are much fewer. Researches in this area have important practicalsignificance for improving the design and manufacture of presses, extending the servicelife, and reducing repairs.The stress and the deformation of the hydrodynamic oil film bearings applied on2500 tons large transfer press made by“Qier Machine Tool Group Company”are analyzed,and the strength and stiffness are evaluated. The pressure and temperature distributions ofthe oil film are simulated to assess the operation of the bearing. At last, some tests aretaken to verify the correctness of the oil film temperature simulation.The main parts of 2500 tons transfer press are introduced and the main structuremodel is established. The finite element static analysis of the main structure is done to getthe stress and deformation distributions of each bearing with the press under uniform loadand partial load. Through the analysis, the strength and stiffness of each bearing meetrequirements. The tilt of each eccentric shaft is about 0.11mm, and the precisions ofbearings are better. Changing the thickness of bearings has little effect on the strength,stiffness, and support accuracy of bearings. Opening tanks on bearings at the reverseposition of the load has no influence on the strength and stiffness of bearings.The oil film flow field of hydrodynamic oil film bearing applied on 2500 tonstransfer press is simulated to obtain the pressure distribution and temperature distribution.The maximum of oil film pressure is 98.3MPa, the maximum of oil film temperature is57.2℃, and the bearing operates well. The influences of the speed, the relative gap, and outside oil pressure on the pressure distribution, temperature distribution, and bearingcapacity are analyzed.Based on the similarity theory, the test bearing is determined, and is simulated. Thetest bearing is tested to measure the temperature. The simulation and experimental resultscoincide and indirectly verify the credibility of the temperature simulation analysis of theoil film bearing applied on the transfer press.更多还原