管柱脱落是自由式管柱结构经常发生的一种现象,这是由于正常运转时转子旋转对定子产生的摩擦扭矩方向实际上是定子及油管的连接螺纹的卸扣方向,如果摩擦力矩大于油管扣的上扣扭矩,油管就脱扣。当尾管很重时,还会出现螺纹掳扣。当管柱脱落时,通过作业重新连接好就能***生产。如果未发生螺纹掳扣,可以采取对扣方式打捞,如果发生掳扣,必须下打捞工具进行打捞。Column shedding is a common phenomenon of free tube structure, which is due to the direction of rotation of the friction torque generated by the stator rotor during normal operation is actually a stator and tubing connection1 screw shackle direction, if the friction torque is greater than the pipe le on torque, oil pipe tripping. When the tail pipe is very he***y, there will also be a thread caption. When the pipe column falls off, the production can be restored by reconnecting the work. If the le is not threaded, it can be salvaged by the way of the le. If the le occurs, the fishing tool must be salvaged.
B、转子B, rotors转子的结构也非常简单,主体是钢制杆件,一般外涂耐磨耐蚀的铬合金材料。其作用是传递动力和写定子形成密封腔。The structure of the rotor is also very simple, the main body is steel rod, generally coated with abrasion resistant and corrosion resistant chromium alloy material. Its function is to transfer power and write the stator to form a seal c***ity.C、回转筒C, rotary barrel回转筒也就是一根内径较大的油管或空心定子筒,接在定子的上部以给转子和抽油杆杆柱以较大的回旋空间,防止转子和抽油杆因偏心运动磨擦磨损油管。A rotary cylinder is also an oil tube or hollow stator barrel with larger inner diameter. It is connected to the upper part of the stator to provide larger swirl space for the rotor and sucker rod string, so as to prevent the rotor and sucker rod from attrition wear due to eccentric wear.

G型单螺杆泵型号在加热炉燃烧系统中的应用 目前,有些中小型钢铁厂和其它冶金加工厂在没有气体燃料(如煤气)的条件下,仍在使用液体燃料。而液体燃料为广泛采用的是重油。比如加热炉燃烧系统在重油的输送及喷燃过程中,选择合适的泵机组对炉子的正常工作很重要。由于重油的正常工作粘度一般都比较高(80 ℃时在50×102-6m2/s以上) ,而且随着温度的变化,其粘度的变化比较大。这就要求我们应该选择合适的泵种以适应这些介质的输送,使之稳定而无故障地运行。尤其是重油的喷燃,泵机组输送压力的恒定很重要。根据调查发现,目前采用外啮合齿轮泵(称齿轮泵)的用户仍居多。其实在这些系统中如果采用G型单螺杆泵则是有更多优点。

现将在现场采用同规格的G型单螺杆泵及齿轮泵在完全相同工况条件下并在输送出口压力为1 MPa时进行了简单的对比,测量了这样两组数据:当输送重油粘度约为75×102-6m2/ s时,齿轮泵出口压力表的指针跳动幅度为±0.16,三螺杆泵出口压力表的指针跳动幅度为±0.05,双螺杆泵出口压力表的指针跳动的幅度为±0.04 ;而当输送重油粘度约为150×102-6m2/ s时,齿轮泵出口压力表的指针跳动幅度为±0.22,三螺杆泵出口压力表的指针跳动的幅度为±0.06,双G型单螺杆泵出口压力表的指针跳动的幅度为±0.04。这说明,G型单螺杆泵在重油的输送和喷燃过程中,介质的输送压力很稳定。并且随着介质粘度的加大,G型单螺杆泵(尤其是双螺杆泵)的无脉动特点相比之下更为明显。