等壁厚定子优势：
Advantages of stator with equal wall
thickness:
1.等壁厚定子是橡胶层薄而均匀，可以改善螺杆泵运行时的散热效果，不会产生热聚集效应，而温度是影响定子寿命的敏感元素之一，等壁厚定子因有良好的散热性能可以减缓橡胶的热老化，从而使用寿命比常规泵长。
1. Rubber layer of the stator with equal wall thickness is
thin and uniform which can improve the heat 1dissipation effect when the screw
pump operates and no thermal aggregation effect is produced. The temperature is
one of sensitive elements affecting lifetime of the stator. The stator with
equal wall thickness can slow down thermal ageing of the rubber because it has
good heat 1dispersion, as a result, its service life is longer than that of
conventional pump.
2.均匀并且薄的橡胶层在设备运行过程中抗变形能力好，因而等壁厚定子螺杆泵单级承受的压力高，在相同工况运行下，可以减少泵的级别和定转子之前过盈的配合量，同时运转扭矩和系统于常规泵型，从而提高泵的使用性能。
2. Uniform and thin rubber layer is with good anti-deforming
capability in the operation process of the equipment, so screw pump of the
stator with equal wall thickness bears high pressure based on1 single stage
which can reduce pump level and previous excess suitable quantity of stator and
rotor in case of operation under the same operating condition and operating
torque and system efficiency are higher than those of conventional pump to
improve pump usability.
等壁厚定子螺杆泵，又称作均匀弹性体，是将定子用金属管材加工成厚度均匀的螺杆泵定子，并在内表面均匀涂上一层橡胶基体。
常规螺杆泵定子是由浇铸在钢体泵筒内形成的，衬套内表面是双螺旋曲面，其厚度不均匀；等壁厚定子螺杆泵采用能满足定子泵筒尺寸精度及机械性能的铸造工艺加工定子泵筒，以金属取代常规定子薄厚不均的橡胶基体，或采用成型工艺使定子外观呈螺旋扭曲状，仅在内腔周围的金属表面保留一层薄的均匀橡胶层。
等壁厚定子螺杆泵的优点
(1)良好的散热特性，提高了螺杆泵的工作寿命。
(2)均匀的橡胶膨胀，提高了泵的工作稳定性。
(3)单级承压高，提高了系统效率。
(4)更广泛的适应性。能够适应含有较高浓度芳香烃的油井。
由于螺杆泵的衬套由橡胶制成，螺杆与衬套间的相对运动为滚动加滑动，为高粘度、高含砂、高含气的输送创造了有利的条件，加之螺杆泵的运动部件少，过流面积大，油流扰动小，使其能在高粘中工作。
螺杆泵优点：
1 结构简单，价格较低，节省设备采购经费。
2 地面装置结构简单，安装方便，占地面积小。
3 泵效高、节能、管理费用低。泵效可达90%，是现有机械采油设备中效率较高的机种之一。
