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。

Based on the analysis of the profile of building cooling loads three cooling schemes are put forward in which screw chillers air-source heat pump and direct-fired LiBr absorption chillers are adopted as cooling sources for the air-conditioning system respectively .

在对建筑冷负荷特点进行分析的基础上，给出了 3 种夏季空调方案，分别以 螺杆式制冷机组、风冷 热泵和直燃式溴化锂冷水机组作为空调系统的冷源。

This paper describes the influences of such factors as axial speed outlet pressure and media on the suction performance of three screw pump and tells about the methods of and basis on how to decide cavitation point during test .

文章阐述了轴向速度、排出压力、介质等因素对 三 螺杆 泵吸上性能的影响，并介绍了试验时判定发生汽蚀工况点的方法和依据。

The systematic theory and the basic analytic process for the three screw pump that established by the investigations give directions to the future investigation .

通过这些研究工作，为 螺杆 泵的理论研究奠定了一 个基础理论系统和基本分析研究过程。为以后对其 进行更加深入的研究打一个铺垫。

The Design and Research of the Three Stations Vertical Injection Equipment for Rubber Stator of Screw Drill and Screw Pump and Simulation of 3D Dynamic Process

螺杆钻具和螺杆 泵橡胶定子的 三工位立式注射成型设备的设计研究与三维动态模拟

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。

Based on a comparison of the initial investment annual operating costs and station area between three design schemes adopts the screw compressor water source heat pump system supplying cooling water for the pharmaceutical production and serving as cold and heat source for the air conditioning system .

比较了该制冷站 3 种设计方案的初投资、年运行费用和占地面积后，确定采用 螺杆式压缩机水源 热泵 机组系统，为制药生产提供冷却水，同时作为空调冷热源。

Three kinds of pumps hydraulic jet pump electrical submersible pump ( ESP ) and screw pump have been used for artificial production in the oilfield and the hydraulic jet pump driven by processed production waste water has showed the best performance .

该油田采用过的人工举升采油方式有射流泵、电潜泵和 螺杆 泵采油 3种，其中以用生产污水为动力液的射流泵采油效果最好。

Discussion on Suction Performance of Three Screw Pump

三 螺杆 泵吸上性能初探

The serials of 135 three screw pump is the positive displacement pump with high technica .

135型 三 螺杆 泵1w_369是一种技术含量相当高的容积式泵。