The excellent shaft builds middle,driving machinery rate is one of important five excellent shafts links in five mining area driving speed also is able to effect having many to the face taking the place of.

Verifying mechanical efficiency of the longitudinal gearing along the ship in navigating by the use of experimental method;

Synchronous detection technology for the surface mechanical efficiency of beam units

In the paper, the design theory and mechanical efficiency of the booster are discussed.

This paper describes a kind of testboard,which can be used to measure engine and other dynamic mechanical power by combining modern sensor technology with eletronic technology,and presents its princible and features.

The effect of speed ratio on machine efficiency;

An analysis of the relationship between machine efficiency and speed ratio, especially for two essential situations of the speed change of inclined plane and lever, is made and quantitative relationship is obtained.