THE VAN DEVENTER TURBINE.

Rangitikei Advocate and Manawatu Argus, Volume XXXVI, Issue 10401, 15 July 1912, Page 2

THE VAN DEVENTER TURBINE.

The attention of American eng:ineers baa recently been very devoted to the Improvement cif the steam tnrbine. The Parsons turbine, as everybody knows nowadays, is aocnated by the pressure .of steam blowing upon tiny aaea era ° g j. on the periphery of a ./"Jig tndinally to its axis. Nicola Tesla a new tnrbine Is actnatod by the vt OGBity of "steam exerting a dragging pewit onfa number of disca strung aide by side £on a single shaft. The Tesla turbine is very, much smaller than a Parsons tbrbine in propoi Sfonto fhe S power it ' the "herring-bone special tnrbine patented last month by Mr Van Deventer, of New x , eclipses .be ®s.l.. mo " m 1 paotaasa. A one ho.se pow on the new principle, con ® a r ily Shinh tb “• -* tfc7lß fcwo rot ? M ‘nnnia ha b3d moving The rotSr ft 'fte closed baud> The rf practically SSnJS** r of equal The oogs are ir < , hbt V-shaped, at angles tho nlisr Steam la admitted to i, ®ar ><* eh am her in which they , Impinges on the point where *" e mash. The V formation cf .« vanes or cogs ensures that the ds&am shall exercise its expansive /•pushing power on the whole breadth ” * i Of each oog. while the simple expedient of.placing the exhaust outlet on the opposite aide of the gear chamber to the steam inlet, secures a practically straight run through for the steam, while allowing t>W> expansions per second at 2000 revolutions per 1 minute. WO packing whatever is used. The casing of the motor :is set a tiny fraction of an inch outside the rotors, and the steam forms a cushion between the meshing teeth. The motor is. therefore, almost silent in its operation. The great power developed in eo small la compass is explained by the fact that there are 80,000 impacts agalnatSfchel'gear teeth a minute, and the same number of expansions in the grooves. As compared with electric motors the new turbine is smaller for the same horsse-power, and it is 20 eo 50 per cent more economical to operate than turbines of the same type; as it obviates all leakage, and utilises the whole expansive power of the steam.