DE547C - Turbine with switched on intermediate blades - Google Patents

Description

1877.

Class 88.

SCHNEIDER & JAQUET in NEUDORF near STRASBOURG i. E. Turbine with switched on intermediate blades.

• Patented in the German Empire from September 4, 1877 ^a ^ ·

The turbines of all previous systems are characterized in their efficiency by the following Causes impaired:

If the turbines work over backwater, the water jet follows the concave side of the Driving wheel blades and only touches the convex side of the opposite blades at the bottom, so that a layer of air forms in the middle of the convex surface of the blade; work the Turbines in the backwater, the air layer formed is displaced by water, the continuous one Water jet broken, and the usefulness significantly reduced.

In the previous systems, too, the water must flow through too quickly prevent the inlet openings from closing before the latter has given its power to the drive wheel large in proportion to the outflow of the drive wheel, so that the water jet forced itself and so stopped the movement of the drive wheel.

Furthermore, as a result of this, the drive wheels of the previous turbines had to be as high as possible to prevent the water from flowing through too quickly.

Finally, the previous systems made an expensive foundation necessary, mostly the water would have to be led into another, artificial bed for a long time.

The construction of the turbine shown in the accompanying drawing remedied the above problems. The shape of the stator blades B, and the through Treibradschaufeln c and the switched intermediate blades α is achieved, that the water, c, and with full pressure against the blades α passed, furnishes to the latter its power abfliefst due to the great AusflufsöfFnungen as dead weight, and prevents the accumulation of air layers on the convex sides of the drive wheel blades.

The number of switched-on intermediate blades and their height depends on the size the turbine, the variable water level and the gradient. The arrangement of the Intermediate blades are achieved so that the turbine operates at the lowest water level, as at highest "backwater of 1 to 1.5 m with the same beneficial effect (proportional to the existing Favor) works.

What is especially valuable in the case of small water gradients is that through the construction the height of the drive wheel can be considerably reduced without reducing the power of the turbine changes.

The track socket d, connected to the turbine housing by means of a lug e cast on it, and intended to accommodate the cast-iron stand f , allows the turbine to be fully assembled without any foundation being placed in the water bed.

The turbines already designed according to this system have, like the samples with dynamometers, as well as tests made with various other turbines in the same river bed have, 10 pCt. Benefit more than any other previous construction.

For this purpose ϊ sheet of drawings.