双热源作用下螺杆泵定子非稳态温度场数值模拟

为了进一步探讨螺杆泵在油气田开发中出现的高温破坏问题,基于汽车滑移理论,采用单向解耦法,以GLB500和DGLB500螺杆泵为例分析定子温度场分布规律及散热性能,研究不同过盈量、转速下的定子增温。结果表明:螺杆泵定子温度场沿长轴对称分布,最高温度点位于定子橡胶衬套厚壁中心处,考虑摩擦生热时,最高温度点沿短轴方向向定子中心偏移;等壁厚螺杆泵散热性能较好且比较均匀,常规螺杆泵长轴方向散热能力优于短轴方向;不考虑摩擦生热时,定子增温与转子转速正相关,随定转子过盈量的增加呈抛物线趋势增加;在双热源作用下,定子增温随过盈量和转速急剧增加,并且等壁厚螺杆泵表现更为敏感。

Numerical simulation on unsteady temperature field of progressive cavity pump stator with double heat source

In order to investigate the problem of high-temperature destruction in oil and gas field production,based on the auto-mobile sliding theory,a single direction decoupling solution strategy was proposed for determining temperature distribution and heat dispersion performance in the stator of the GLB500 and DGLB500 pumps.The stator temperature increase was analyzed over different interference,rotational speed and friction coefficient.The results show that the stator temperature field of progressive cavity pumps distributes symmetrically along the long axis,and the highest temperature point locates at the center of the thick wall of stator rubber bushing.When the friction heat is considered,the highest temperature point shifts to the stator center along the direction of the short axis.The heat dispersion performance of the iso-wall thickness progressive cavity pump is good and more uniform.And the dispersion performance of the conventional progressive cavity pump in long axis is better than the short one.When the friction heat is neglected,the temperature increase of stator correlates with rotational speed positively,it increases in parabolic trend along with interference.Under the effect of double heat sources,the temperature increase of stator rises sharply with interference and rotational speed,moreover,the iso-wall thickness progressive cavity pump is more sensitive to them.