long stroke engine

Frequency conversion control system of long stroke non-beam pumping unit based on PLC;

基于PLC的无游梁长冲程抽油机变频控制系统

Optimum design of a long stroke variable torque pumping unit and simulation of its dynamic behaviors.;

扇形长冲程抽油机的优化设计与动力仿真

The speculation of the crank chain drive mobile wheel pumping unit with long stroke;

曲柄链条动滑轮式长冲程抽油机的初步构思

Based on engineering geological feature of tunnel setting,a finite element of entrance of Changchong tunnel is established,which can simulate the construction process under the bench method and CD method.

根据隧址区工程地质特征,建立了长冲隧道进口段的有限元模型;模拟了台阶分部法和CD工法开挖隧道的过程,通过对围岩的位移和应力特征、屈服接近度和支护结构受力特征的分析,从施工工序和施工力学角度对两种开挖方法进行了比较,结果表明设计推荐采用的CD工法较台阶分部法没有明显的优势。

Intelligent and long stroke pumping unit of JPCYJC model for cluster wells;

JPCYJC型丛式井智能长冲程抽油机设计

The lower super long stroke pumping unit with a cylinder chain is presented.

提出了一种可大幅度提高抽油杆冲程的圆柱链低矮式超长冲程抽油机 ,介绍了其工作原理、特制链轮的计算模型和计算方法 ,并对弹簧平衡系统进行了分析和计算。

This paper has collected Chinese long stroke pumping units(7 kinds of incremental stroke beam pumping units,9 kinds of incremental stroke blue elephants and 11 kinds of long stroke blue elephants),briefly introduced their structures.

本文集锦了我国长冲程抽油机（７种增大冲程游梁抽油机，９种增大冲程无游梁抽油机和１１种长冲程无游梁抽油机），扼要地介绍了它们的结构，通过对长冲程抽油机的用途、类型和优点分析，表明：增大冲程游梁抽油机是常规抽油机的发展方向；增大冲程无游梁抽油机是增大冲程抽油机的发展方向；长冲程无游梁抽油机是长冲程抽油机的发展方向，也是我国抽油机的发展方向。