混合励磁井下涡轮发电机设计及试验研究

The design and experimental study of the hybrid excitation downhole turbogenerator

针对现有井下发电机功率小、耐高温性能差的问题,设计了一种混合励磁井下涡轮发电机。给出了该发电机的设计方案和计算步骤,分析了高温环境对涡轮发电机的影响及采取的措施,并对其导轮及涡轮型式对发电量的影响做了分析。通过试验研究了高温、高压、钻井泵排量与涡轮发电机性能的关系。结果表明,高压对发电机输出功率无影响,效率随温度的升高而明显下降,在实验室条件下,发电机功率能够满足系统供电要求。

In light of the low power and poor high temperature resistance of existing downhole generators,a kind of hybrid excitation generator was designed.The design scheme and calculation procedure of the generator were formulated.The effect of high temperature environment on the turbogenerator and the measures to be taken were analyzed.The effect of the guide wheel and the turbine type on the power generation was also discussed.Through the experiment the relationship between high temperature,high pressure,drilling pump displacement and the performance of the turbogenerator was studied.The result indicated that high pressure had no effect on the output power of the generator.The efficiency decreased remarkably with the increase of temperature.In laboratory conditions the power of the generator could meet the needs of system power supply.