【作者】 郝明；

【导师】 蒋玮；

【作者基本信息】 大连理工大学 ， 机械电子工程， 2013， 硕士

【摘要】 核主泵是第三代核电站AP1000的关键部件之一,对于AP1000来说,它采用的是一种带屏蔽电机的屏蔽泵,为了避免核主泵屏蔽电机内定子线圈受到冷却液的腐蚀,需要在定子内部安装定子屏蔽套。现阶段定子屏蔽套在焊接完成后,主要是采用抽真空法或水压试验法来完成定子屏蔽套的装配。然而这两种方法难以实现定子屏蔽套与定子铁芯的无隙贴附,所以探索新的合适的装配方法十分必要。本文在国家973项目核主泵制造的关键科学问题(2009CB724300)资助下,基于液压胀形原理设计了一种可用于实现核主泵定子屏蔽套无隙贴附安装的液压试验台,该试验台与传统的方法相比简单易行,且能够实现胀形压力的精确控制。首先对试验台的液压系统进行了设计,该系统主要由推制、充液、增压三部分组成。其设计主要包括原理图设计、主要参数的确定、执行元件及其他辅助元器件的选择。与以往的技术相比,本系统采用了比例溢流阀、比例换向阀、位移传感器、压力变送器等元件,使胀形过程中压力与位移的控制更加精确；然后运用AMEsim软件对试验台的液压系统进行了性能仿真,采用hydraulic component design(HCD)库自行设计了增压器、定子外壳、喷油嘴的仿真模型,同时建立了推制、充液、增压部分的仿真模型,并研究了各部分的压力和位移特性曲线；接着运用PLC设计了液压试验台的电气控制部分,采用基本模块与特殊模块相结合的方法完成了液压试验台的控制,从而使整个试验台的控制过程更加灵活方便,在这一过程中完成了对装配过程中液压元件的启停控制和液压泵的压力与流量的实时控制,同时分别为开关量与比例阀、传感器设计了相应的控制流程图与控制程序,并初步设计了模糊控制器；最后,在完成整个试验台的原理设计后,选择了液压装置的总体配置形式和液压元件的配置方式,并完成了试验台的整体结构设计,设计了一种可应用于定子屏蔽套无隙贴附安装的新型固定形式。更多还原

【Abstract】 Nuclear Reactor Coolant Pump is one of the key components in API000. For AP1000it uses a shield pump with canned motor. In order to avoid coil corrosion, it is very important to shield the motor components from the coolant. Therefore, the stator is encased in corrosion-resistant cans to prevent the contact of stator windings from the reactor coolant. After the stator can was welded together from a piece of armor plate, the main methods to attach to the can set on the stator are the use of vacuum evaporation method and hydrostatic testing method. However, both methods are difficult to attach the two parts perfectly. It is necessary to explore a new method to make them attach together. Supported by the National Basic Research Program of China (2009CB724300), the paper uses the hydraulic bulge forming technology to design a hydraulic test bench to assemble the stator can. Compared with the traditional methods, the test bench can make the stator can and stator attached together perfectly and easily.Firstly, a hydraulic system was designed for the hydraulic test bench in the paper. This hydraulic system consists of a pushing part, liquid-filled part and pressure-boosting part, whose design includes principle design, main parameters calculation, the selection of actuators and other ancillary components. Compared with other techniques, the proportional relief valve, proportional directional control valve, displacement sensor, pressure transmitter and some other elements are used to ensure the accuracy of pressure and displacement control. Secondly, the characteristic of the hydraulic system is simulated by using AMESim software. With hydraulic component design (HCD), the supercharger, the stator and the oil injection nozzle model was built. After this, the model of pushing part, liquid-filled part and the pressure-boosting part are designed. The characteristic of the system, such as the pressure and the displacement were analyzed by simulation. Thirdly, the control system of the hydraulic test bench was designed by PLC. Compared with existing technologies, the control system is designed by the basic and analog module of PLC. The design allows the entire test bench control process more flexible and convenient. In the system, the tasks of real-time measuring of the pressure and the flow of hydraulic cylinder and the open and shut characteristic of hydraulic components are accomplished by PLC. In the control section, the control program of proportional valve and the control flow chart of switch signal are designed. In the same time, the fuzzy controller is preliminary designed. Finally, after completing the design of hydraulic system, the overall configuration forms of hydraulic devices and hydraulic components configuration mode are chosen to design the structure of the hydraulic bulging sets. In this process, a novel fixed mode which can be used for assembling stator can was designed.更多还原