It's necessary to investigate the theory of the three screw pump.
所以对三螺杆泵的理论研究是非常必要的。
The main aim in this paper is the basic theory of the three screw pump.
于是在研究中主要是对三螺杆泵做基础理论的研究。
The theories established in this paper give directions to the current design and produce of the three screw pump; and also give solutions of the problems during usage.
本文的基础理论研究对当前的螺杆泵的设计生产都有很好的指导作用，对当前三螺杆泵使用中出现的问题有很好的解决效果。
By taking 135 three-screw pump as an example, the geometric parameter design, the forming of spiral surface and the characteristic of screw gearing are investigated.
以135型三螺杆泵为例，对螺杆几何参数设计、螺旋型面的形成、螺杆啮合特性进行了探讨。
Three mutual engagement of the screw in the pump cylinder for each lead of the formation of a sealed chamber, causing the seal between the suction mouth.
三根互相啮合的螺杆，在泵缸内按每个导程形成为一个密封腔，造成吸排口之间的密封。
The three-dimensional potential flow inside the impeller of a screw centrifugal pump was analysed by the boundary element method.
采用边界元法对螺旋离心泵叶轮中的三维势流进行了数值计算。
As long as the selection of appropriate, to maintain a rational, three-screw pump can ensure satisfactory operation.
只要选型得当，维护合理，三螺杆泵就可保证令人满意的运行。
Working state of a screw pump rod-line is analyzed using Finite element analysis method during broken working station, and three kinds of possible mechanical models are set up.
如何降低螺杆泵抽油杆的应力水平，提高工作寿命是石油开采设备研究中一个急需解决的力学问题。
Vertical three-screw pump adopts double seal mechanical seal and framework oil seal, no leakage.
立式三螺杆泵采用机械密封加骨架油封双重密封方式，无泄露。
Vertical three-screw pump smooth operation, low noise.
立式三螺杆泵运行平稳，噪音低。
Vertical three-screw pump internal simple and compact structure, high efficiency, strong self-priming capacity, energy saving effect is good;
立式三螺杆泵内部结构简单紧凑，效率高、具有很强的自吸能力、节能效果好；
Vertical three-screw pump internal simple and compact structure, high efficiency, strong self-priming capacity, energy saving effect is good;
立式三螺杆泵内部结构简单紧凑，效率高、具有很强的自吸能力、节能效果好；
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