Chinese screw pump manufacturers produce three-screw pumps, twin-screw pumps, and multiphase pumps.

1.  The adoption of integral screw shafts increases the  equivalent diameter of the critical crosssection by  nearly 50% and enhances strength by approximately 2.5  times compared to the previous split-type screw rotor  shafts. 

2.  Integral screw shafts eliminate the need for keyways,  ensuring that there is no reduction in shaft strength  due to the absence of keyways. Moreover, it eliminates  stress concentrations caused by keyway machining. 

3.  The unique profile design significantly increases the  maximum pressure within the single-stage screw rotor  sealing chamber. As a result, with the same outlet  pressure, the number of sealing chambers on the screw  rotor is reduced by 30% compared to conventional  screw designs. This reduction in sealing chambers  leads to a corresponding decrease in rotor length,  shortening the span between support points on the  screw rotor shaft by 25%. The rotor shaft experiences  an approximately 80% reduction in deflection under the  same load.

4.  The design aims for zero theoretically dynamic balance,  substantially reducing additional loads on the screw  rotor shaft (almost close to zero). This reduction leads  to a decrease in horizontal load on the rotor shaft of  approximately 30% to 60%. 

5.  The screw geometry design is based on rotor dynamics  research, resulting in the following improvements: a.  The loads on the screw rotor shaft transition from  externally symmetric cyclic stress to nearly symmetric  cyclic stress, withómax = -ómin. b.  The average stress,óm, approaches zero. c.  The absolute value of stress amplitude,óa,  decreases by approximately 30% to 60%. 

All of the above 5 points will greatly increase the fatigue  strength of the screw rotor shaft, thus avoiding fatigue  failure of the screw rotor shaft.

WGS offers a wide range of customized products  across various industries, ranging from individual  components to complete smart systems,  providing tailored solutions that best match the  specific needs.