高速冲槽机上冲槽模具质量的改进

针对原电机定子扇形片冲槽模具在高速冲槽机上使用后出现的各种质量问题,分别从模具主要工作零件的结构、材质的使用及制造工艺等方面进行改进。解决了崩刃、凹模炸裂和卸料不畅等问题,使冲片的合格率达100%。同时提高了模具的使用寿命,降低了模具成本。

Numerical and Experimental Modelling of Gas Flow and Heat Transfer in the Air Gap of an Electric Machine. Part II: Grooved Surfaces

The study deals with the cooling of a high-speed electric machine through an air gap with numerical and experimental methods.The rotation speed of the test machine is between 5000-4000 r/rain and the machine is cooled by a forced gas flow through the air gap.In the previous part of the research the friction coefficient was measured for smooth and grooved stator cases with a smooth rotor.The heat transfer coefficient was recently calculated by a numerical method and measured for a smooth stator-rotor combination.In this report the cases with axial groove slots at the stator and/or rotor surfaces are studied.Numerical flow simulations and measurements have been done for the test machine dimensions at a large velocity range.At constant mass flow rate the heat transfer coefficients by the numerical method attain bigger values with groove slots on the stator or rotor surfaces.The results by the numerical method have been confirmed with measurements.The RdF-sensor was glued to the stator and rotor surfaces to measure the heat flux through the surface,as well as the temperature.

液力变矩器涡轮叶片定位槽冲槽机设计与研究

针对液力变矩器的涡轮外环叶片定位槽的冲槽加工,手工单头冲槽机无法实现精准和高效冲槽加工。为解决该问题,以YB系列液力变矩器为研究对象,着重从冲槽工艺分析、整机结构和工装夹具设计等方面对冲槽机进行设计与研究,开发一种涡轮叶片定位槽冲槽机,可实现回转类零件槽孔加工,提高了对液力变矩器的制造精度和效率。