外文翻译采煤机

1、installed motor power of shearer loaders and armoured face conveyors (AFC), more sophisticated support control systems and longer face length, in order to reduce costs and achieve higher productivity. These efforts have resulted in higher output and previously unseen face advance rates. The trend towards “bigger and better” equipment and layout schemes, however, is rapidly nearing the limitations of technical and economical feasibility. To realise further productivity increases, organ。

2、earersfor thin seam of China are reviewed， and the main technical parameters， general structure， serialization anddevelopment trend of such sheares are introduced Keywords： thin seam； shearer； electrical haulage； multi motor driving； transverse arrangement German Eickhoff company and American JOY company, the mid 70s in 20 centuries develops a direct current to lead to adopt coal machine one after another.Henceforth, each mainly adopted coal machine a research a manufacturing a。

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4、derground longwall coal mining has been on increasing the installed motor power of shearer loaders and armored face conveyors (AFC) ,more sophisticated support control systems and longer face length , in order to reduce costs and achieve higher productivity .These efforts have resulted in higher output and previously unseen face advance rates. The trend towards “bigger and better ” equipment and layout schemes, however, is rapidly nearing the limitations of technical and economical fea。

5、earersfor thin seam of China are reviewed， and the main technical parameters， general structure， serialization anddevelopment trend of such sheares are introduced Keywords： thin seam； shearer； electrical haulage； multi motor driving； transverse arrangement German Eickhoff company and American JOY company, the mid 70s in 20 centuries develops a direct current to lead to adopt coal machine one after another.Henceforth, each mainly adopted coal machine a research a manufacturing a。

6、u 221008, China chenhaocumttom.com AbstractThe paper presented the double Switched Reluctance motors parallel drive system for the electrical traction in shearer. The system components, such as the Switched Reluctance motor, the main circuit of the power converter and the controller, were described. The control strategies of the closed-loop rotor speed control with PI algorithm and balancing the distribution of the loads with fuzzy logic algorithm were given. The tests results we。

7、types of coal-cutting equipment used in coal mines are shearers and plows. Plows are used in low seams, 42in. or less. The unit consists of steel construction equipped with carbon-tipped bits. This passive steel unit is engaged to a guiding system on the face conveyor. An endless round link chain powered by synchronized electric drives on each end of the face conveyor pulls the plow body at speeds between 120 and 420 ft/min along the face. For the cutting process the plow has to be。