单螺杆压缩机机械密封的研究与改进-流体机械及工程专业论文.docxVIP

摘 要 本文介于金昊空压机厂单螺杆压缩机漏油严重的现象，设计出双列反向螺旋槽 上游泵送机械密封，对其进行了解析计算，并运用有限元软件 ANSYS 及 FLUENT， 对稳态密封环的温度场、稳态端面之间的压力场进行了模拟，得出了该密封环的压 力场、温度场分布。研究了不同的摩擦副配对材料、密封介质压力、主轴转速等对 密封端面温度的影响；并讨论了密封腔压力、转速、密封介质的粘度对机械密封的 一些稳定性能参数的影响，为设计、优化机械密封提供了理论指导作用。模拟结果 证明了该设计的正确性，变 转速或变压力条件下，所设计的新型密封性能良好,端 面温升及摩擦功耗都较低，较普通的机械密封性能好，较单列的螺旋槽上游泵送机 械密封性能也有所改善，满足工业的应用要求。最后对新型机械密封进行了经济性 的分析，使其在功能和经济上均达到要求。同时，本文对于解决其他机械密封的泄 露问题，具有一定的指导意义和应用价值。 关键词：新型机械密封；解析计算；数值模拟；变工况；工业应用 - I - Abstract According to the serious phenomenon of outlet leakage for single screw compressor of the Jinhao Air Compressor Company, design the dual column reverse spiral groove upstream pumping mechanical seal, and analytical calculation was carried out. Use the finite element software ANSYS and FLUENT,simulate the steady-state temperature field of the sealing ring, the steady-state pressure field between the end, obtain the pressure field, temperature field distribution of the sealing ring. Study the effects of different pairs of friction materials, sealed medium pressure, spindle speed on temperature of the seal faces; and discuss the effect of the seal chamber pressure, speed, the viscosity of the sealing medium on some of the stability parameters of mechanical seal , for the design and optimization of mechanical seal provides a theoretical guide. Simulation results prove the correctness of the design, on the conditions of variable speed or variable pressure, the performance of the new designed sealing is good, face temperature and friction power is relatively low, better than the performance of ordinary mechanical seal, compared to the single spiral groove upstream pumping mechanical seal,the performance is also improved,meet industrial application requirements. Finally, do the economic analysis for the new mechanical seals, make it functionally and economically meet the requirements. At the same time, to solve leak problems of the other mechanical seal, this paper can provide a certain guiding significance and application value. Ke