天然气涡旋压缩机增压装置供油系统压力和流量的优化控制
发布时间：2019-05-15 15:46
【摘要】：涡旋压缩机是一种新型高效、低噪、高可靠性的容积式压缩机,相比其它形式的压缩机在很多方面有着较大的优势,特别是在小排气量、低压缩比的情况下,涡旋压缩机的性能更为突出。目前涡旋压缩机的应用领域日趋广泛,如制冷空调、动力工程、石油化工等领域。涡旋压缩机是天然气增压装置的主要部件之一,供油系统为涡旋压缩机提供了良好的密封、润滑、冷却和降噪声等作用,然而当机组内润滑油的量不足或过量时会产生副作用:润滑油过量就会产生搅拌、积存等副作用,会使压缩机的功耗增加,压缩性能降低;润滑油的流量不足,摩擦副产生的热量就不能被及时带走,就会产生热裂纹,从而引起泄漏。到目前为止,大部分的研究主要集中在喷油对涡旋压缩机性能的影响,而对润滑油的状态及供油系统的油量对涡旋压缩机的性能影响尚没有进行深入的研究。 本文整体考虑涡旋压缩机供油系统,应用流体力学和润滑理论,建立了涡旋压缩机供油系统流量分配模型,并运用等价电路法对分配模型进行了简化,具体步骤为:由伯努力方程得出油在管道中的流动压降数学模型,进而推导出电机转速与压降之间、电机转速与耗油量之间的数学模型及内部润滑系统的功耗计算公式。在所得结论的基础上对主要辅助设备的阻力损失进行了计算。最后对增压装置的电机选用和齿轮泵的选用进行了设计计算。 以机械密封动环与静环啮合面之间的摩擦副及密封机理为基础,对机械密封各主要参量给出了计算公式,建立了冲洗量与电机转速之间的数学模型,在转速较低的情况下,忽略密封件与流体搅拌产生和轴承侧传入的热量,可对模型进行简化。最后对机械密封产生的热量给出了不同的算法。 根据相关数学模型,应用simulink软件包模块图并将其封装成仿真模型,将这些子系统仿真模型按照工作过程及相关理论做了有机的连接,进行了仿真研究。由研究结果可知:第二循环油路的仿真结果和实验结果基本一致,从而验证了压降与电机转速之间的数学模型的正确性和可行性;第一循环回路耗油量与仿真结果相吻合。研究结果为涡旋压缩机的供油量的控制提供了一定的理论依据。 以仿真结果为理论依据,对供油系统设计了控制方案,实验方案,本文对后续工作提出展望,使得涡旋压缩机的工作性能进一步提高,在涡旋压缩机供油系统向着智能化发展方向的研究具有一定的参考价值。
[Abstract]:The scroll compressor is a new type of high-efficiency, low-noise and high-reliability volumetric compressor. Compared with other types of compressors, the scroll compressor has a great advantage in many respects, especially in the case of small air displacement and low compression ratio, the performance of the scroll compressor is more prominent. At present, the application field of the scroll compressor is becoming more and more extensive, such as refrigeration air-conditioning, power engineering, petrochemical industry and other fields. the scroll compressor is one of the main components of the natural gas pressurization device, and the oil supply system provides good sealing, lubrication, cooling and noise reduction and the like for the scroll compressor, The side effects such as accumulation can increase the power consumption of the compressor, the compression performance is reduced, the flow rate of the lubricating oil is insufficient, the heat generated by the friction pair cannot be taken away in time, and the heat crack can be generated, and the leakage can be caused. So far, most of the research has focused on the effect of oil injection on the performance of the scroll compressor, and the influence of the state of the lubricating oil and the oil quantity of the oil supply system on the performance of the scroll compressor has not been deeply studied. In this paper, the flow distribution model of the oil supply system of the scroll compressor is established by considering the oil supply system of the scroll compressor, the fluid mechanics and the lubrication theory, and the equivalent circuit method is used to simplify the distribution model. The mathematical model of the flow pressure drop between the speed and pressure drop of the motor, the mathematical model between the speed of the motor and the fuel consumption and the power consumption of the internal lubrication system are derived. Formula. The resistance loss of the main auxiliary equipment is made on the basis of the obtained conclusion. Finally, the selection of the motor and the selection of the gear pump are designed. Based on the friction pair and the sealing mechanism between the mechanical seal ring and the engaging surface of the stationary ring, the formulas for calculating the main parameters of the mechanical seal are given, and the mathematical model between the flushing quantity and the rotating speed of the motor is established. In the low case, it is possible to ignore the heat generated by the seal and the fluid agitation and the side of the bearing, The type is simplified, and the heat generated by the mechanical seal is finally given. according to the relevant mathematical model, the multi-system simulation model is applied to the simulation model according to the relevant mathematical model, and the simulation models of the subsystems are organically connected according to the working process and the related theory The simulation results show that the simulation results of the second circulating oil circuit are consistent with the experimental results, and the correctness and feasibility of the mathematical model between the pressure drop and the motor speed are verified. The results of the study are consistent with the simulation results. The results of the study are as follows: the control of the oil supply quantity of the scroll compressor Based on the simulation results, the control scheme and experimental scheme of the oil supply system are designed, and the prospect of the follow-up work is put forward in this paper, so that the scroll compression The working performance of the machine is further improved, and the oil supply system of the scroll compressor is in the direction of intelligent development
【学位授予单位】：兰州理工大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH45
本文编号：2477613
[Abstract]:The scroll compressor is a new type of high-efficiency, low-noise and high-reliability volumetric compressor. Compared with other types of compressors, the scroll compressor has a great advantage in many respects, especially in the case of small air displacement and low compression ratio, the performance of the scroll compressor is more prominent. At present, the application field of the scroll compressor is becoming more and more extensive, such as refrigeration air-conditioning, power engineering, petrochemical industry and other fields. the scroll compressor is one of the main components of the natural gas pressurization device, and the oil supply system provides good sealing, lubrication, cooling and noise reduction and the like for the scroll compressor, The side effects such as accumulation can increase the power consumption of the compressor, the compression performance is reduced, the flow rate of the lubricating oil is insufficient, the heat generated by the friction pair cannot be taken away in time, and the heat crack can be generated, and the leakage can be caused. So far, most of the research has focused on the effect of oil injection on the performance of the scroll compressor, and the influence of the state of the lubricating oil and the oil quantity of the oil supply system on the performance of the scroll compressor has not been deeply studied. In this paper, the flow distribution model of the oil supply system of the scroll compressor is established by considering the oil supply system of the scroll compressor, the fluid mechanics and the lubrication theory, and the equivalent circuit method is used to simplify the distribution model. The mathematical model of the flow pressure drop between the speed and pressure drop of the motor, the mathematical model between the speed of the motor and the fuel consumption and the power consumption of the internal lubrication system are derived. Formula. The resistance loss of the main auxiliary equipment is made on the basis of the obtained conclusion. Finally, the selection of the motor and the selection of the gear pump are designed. Based on the friction pair and the sealing mechanism between the mechanical seal ring and the engaging surface of the stationary ring, the formulas for calculating the main parameters of the mechanical seal are given, and the mathematical model between the flushing quantity and the rotating speed of the motor is established. In the low case, it is possible to ignore the heat generated by the seal and the fluid agitation and the side of the bearing, The type is simplified, and the heat generated by the mechanical seal is finally given. according to the relevant mathematical model, the multi-system simulation model is applied to the simulation model according to the relevant mathematical model, and the simulation models of the subsystems are organically connected according to the working process and the related theory The simulation results show that the simulation results of the second circulating oil circuit are consistent with the experimental results, and the correctness and feasibility of the mathematical model between the pressure drop and the motor speed are verified. The results of the study are consistent with the simulation results. The results of the study are as follows: the control of the oil supply quantity of the scroll compressor Based on the simulation results, the control scheme and experimental scheme of the oil supply system are designed, and the prospect of the follow-up work is put forward in this paper, so that the scroll compression The working performance of the machine is further improved, and the oil supply system of the scroll compressor is in the direction of intelligent development
【学位授予单位】：兰州理工大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH45
【参考文献】
相关期刊论文 前10条
1 赵兴艳,刘振全;涡旋压缩机润滑系统润滑油量优化分析[J];甘肃工业大学学报;1997年02期
2 屈宗长;程志明;王迪生;;车用涡旋空调压缩机含油量优化[J];河北工业科技;1998年04期
3 彭旭东,谢友柏,顾永泉;机械密封端面温度的确定[J];化工机械;1996年06期
4 王福生,孟晓风;一种气体压力控制方法及应用[J];测控技术;2001年04期
5 王东;黄效国;过跃;;基于MATLAB/SIMULINK的阀控缸模块化建模与研究[J];机床与液压;2009年09期
6 周剑锋;顾伯勤;;机械密封环的传热特性分析[J];机械工程学报;2006年09期
7 刘振全,杜桂荣;涡旋压缩机理论机构模型[J];机械工程学报;1999年02期
8 杨育民,乔宗亮;带背压机构的涡旋压缩机润滑系统的研究[J];流体工程;1993年10期
9 陈志明;熊则男;徐博;;润滑油对涡旋压缩机压缩过程的影响[J];流体机械;1995年04期
10 曾涛;润滑对机械密封性能的影响[J];流体机械;2001年09期
相关硕士学位论文 前1条
1 余鹏飞;天然气涡旋压缩机增压装置供油系统的研究[D];兰州理工大学;2008年
，本文编号：2477613
本文链接：https://www.wllwen.com/kejilunwen/jixiegongcheng/2477613.html
