论文部分内容阅读
集肤效应电热抽油杆工作时 ,电流只沿内壁流过 ,外壁无电流 ,且杆外也无电磁场存在 ,故可安全应用。电热杆的交流阻抗远大于导线的电阻 ,因此主要发热体为抽油杆 ,可快速有效地加热杆外的原油 ,而导线不会过热 ,有利于导线的绝缘与保护。通过对电热杆所受电磁力的分析 ,推导出了抽油杆内表面单位面积上所受电磁力的计算公式 ,从而得知电热杆工作时将产生沿径向向外的径向振动 ,振动频率为 1 0 0Hz。但由于振幅较小 ,这种振动不会对抽油杆的强度和密封产生明显的不利影响
Skin effect Electric sucker rod work, the current flows only along the inner wall, the outer wall without current, and there is no electromagnetic field outside the rod, it can be safely applied. AC rod resistance is much larger than the resistance of the wire, so the main heating element is a sucker rod, which can quickly and effectively heat crude oil outside the rod, while the wire will not overheat, which is conducive to the insulation and protection of the wire. By analyzing the electromagnetic force of the electric heating rod, the formula of the electromagnetic force per unit area of the inner surface of the sucker rod is deduced, and the radial vibration and vibration The frequency is 100Hz. However, due to the small amplitude, this vibration does not have a significant adverse effect on the strength and sealing of the sucker rod