US802911A - Turbine. - Google Patents

Description

PATENTED OCT. 24, 1905.

H. BURRILL TURBINE. APPLICATION FILED SEPT. 2, 19oz.

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Specification of Letters Patent.

Patented Oct. 24, 1905.

Application filed September 2, 1902. Serial No. 121,873.

To all whom it may concern.-

Be i t known that I, HIRAM BURRILL, a citizen of the United States, residing at Sangerville,

in the county of Piscataquis and State of Maine, have invented certain new and useful Improvements in Turbines; and I do hereby declare the following to be a full, clear, and

exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

In the accompanying drawings, Figure 1 is a side elevation of the turbine water-wheel, a portion of the casing and the wheel being shown in vertical section for more clearly revealing the interior construction. Fig. 2 is a detail perspective view of a fragment of the turbine-wheel.

The turbine forming the subject-matter of the present invention is so constructed that water may be intro'd need to the wheel in given quantities and in such a manner that the different streams of water striking the buckets will pass through the wheel mechanism in unbroken columns. The structure is also so arranged that the water, whatever the quantity, is always introduced at the top of the turbine-wheel, so that the wheel always receives the full flow of the water-power passed through the turbine.

The turbine-wheel is inclosed in a cylindrical casing l, which is arranged in any suitable manner in the penstock of a flume. Projecting outwardly from the casing 1 are upper and lower horizontal flanges 2 and 3, between which is mounted an adjustable gate 4. The cylindrical portion of the casing 1 extends upwardly half the distance between the said flanges 2 and 3, the upper half of said distance being left open. The gate 4 is preferably of cylindrical form, being provided with a main ring portion which extends entirely around that portion of the casing 1 which projects above the lowerflange 3. The gate is adapted to be raised and lowered, so as to reduce or increase the space above the cylindrical portion of the casing 1, through which water is permitted to pass to the turbine-wheel 5, rotatably mounted within the casing.

A series of vertical partitions 6 are arranged between the upper and lower flanges 2 and 3 all the way round the turbine, the said partitions being preferably arranged tangentially with respect to the turbine, and thus being in position to direct columns of .water in a tangential manner against the buckets of the wheel 5.

The shaft 15 of the turbine-wheel engages the bearing 14:, which is provided with a suitable packing-gland 27 and is supported at its lower end by a cone-bearing 28, which is supported in position in the lower part of the casing 1 by means of a spider 29. The lower end of the shaft 15 is formed with a conicalshaped bearing-recess 30 for engaging and resting upon the said cone-bearing 28. The top of the casing is closed by a conical-shaped cover, as 31. 1

The turbine-wheel is formed with a down wardly-curved central web portion 32, which carries at its outer periphery a curved flange 33. This flange is of sufficient diameter at its upper edge to fill the casing 1 and is of substantially cyma-recta shape, being curved inwardly and downwardly toward the webbed portion 32, and thence it is further curved inwardly and downwardly below the said web, the portion of the flange beneath the web being curved oppositely to the portion of the flange above the said web, making the said flange approximately S-shaped in cross-section, as clearly shown in Fig. 1. A series of cupped or shell-shaped blades 3 project outwardly from the said flange 33, the said blades increasing in width from the upper edge of the flange 33 to the lower edge thereof and extending a short distance below the said lower edge of the flange. Said blades thus produce a series of passages through which the water supplied to the wheel 5 must travel, each of said passages having the flange 33 as its inner wall, and the said inner wall being of cyrnarecta form causes the transverse area of the respective passages to increase gradually toward the lower end thereof, and therefore packing of the water and the resultant dead-weight is prevented. Moreover, the inwardly-curved portion of the inner wall of the passage at its outlet end presents no abrupt edges or angles against which the column of water may contact and become broken. The blades are spaced apart at equal distances, and therefore the width of each passage between any two blades-that is, the distance horizontally from blade to bladeis the same throughout the length of the passage, and the cyma-recta wall produces a gradual increase in the depth of each passage from top to bottom, the depth of the passage being understood to be the distance horizontally at any given point from the outer edge of the and blades forming passages, each of which blades to the inner wall to which the blades is oi the same width throughout its length are secured. and" of gradually-increasing depth from the Having thus fully described my invention, upper to the lower end. 5 what 1 claim as new, and desire to secure by In testimony whereof I hereunto aflix my 5 Letters Patent, issignature in presence of two Witnesses.

A turbine comprising a casing, a wheel HIRAM BURRILL. mounted therein and formed With an annular, Witnesses: cyma-recta flange and blades spaced apart on HIRAM WoRs'rER,

10 the outer surface of the flange, said flange STANLEY J DIFFIN.

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