US1150747A - Axial-flow pump and turbine. - Google Patents

Description

E. F. DELERY.

AXlAL FLOW PUMP AND TURBINE.

APPLICATION FILED NOV. 10, I913.

- PatentedAug. 17,19

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EUGENE FRANK DELERY, OF NEW ORLEANS, LOUISIANA.

AXIAL-FLOW PUMP AND TURBINE.

App1icationfi1edNovember 10, 1913.

To all whom it may concern:

Be it known that I, EUGENE FRAN DELIiRY, a citizen of the United States, residing at New Orleans, in the parish of Orleans and State of" Louisiana, .have invented new and useful Improvements in Axial-Flow Pumps and Turbines, of which the following is a specification.

My invention relates to improvements in axial flow pumps and turbines and consists in means of guiding the flow of liquid from the suction opening of the pump or turbine to the wheel or runner thereof and thence to the discharge opening of the pump or turbine with the least possible agitation or change of velocity of the liquid, at the same time making use of the shortest possible shaft with a consequent reduction of vibration in the runner, shaft, and bearings. I attain these objects by means of the mechanisms illustrated in the accompanylng drawings in which Figure l is a half section and half elevation of a double unit (or two units) of a pump or turbine connected to a' common suction pipe' at 10 by the suction volutes 1, which discharge through the runner or runners 2 to the discharge volutes 3 and thence to the discharge pipe or pipes, in the case of a pump. Fig. 2 is a threequarter elevation and quarter section of a single pump or turbine showing entrance volute 1, balanced runner 2, diffusion vanes and diffusion vane chamber 4; and discharge volute 3, in the case of a pump. Fig. 3 is a plan view of one form of runner to be used in connection with this form of pump or turbine. Figs. 4, 5, 6, and 7 are elevations of different runners with shroud rings broken away in order to show the characteristic forms of the blades which may be used with this type of pump or turb ne.

Similar numerals refer to similar parts in all figures and the word runner is to be interpreted tomean the wheel or rotor of the pump or turbine and the word volute to mean a spirally formed tubular fluid passage, not necessarily the volute of a circle.

The following is a list of the numerals and the parts to which they refer.

1 is a suction volute in the case of a pump or the discharge volute in the case of a turbine other than an outward flow radial discharge turbine.

2 is the runner in the case of either pump or turbine Specification of Letters Patent.

Patented Aug. 1'7, 1915.

Serial No. 800,116.

3 is the discharge volute in the case of a pump or the suction volute in the case of aan axial flow turbine.

The method of operation in the case ofa pump is as follows: The fluid is admitted from the suction pipe at 10 to the suction volute or volutes 1, each of which is so shaped that it wraps around the shaft in a tubular spiral path and has an annular opening, on the side next the runner, of constant-width to the runner two (2), and a constantly decreasing cross sectional area in a spiral direction around the shaft, said sections being taken on planes at right angles to the plane of revolution and radially spaced around the origin of the spiral,

-the form of these sections to be such as to place the centers of areas in such a position as to leave space at the center of the spiral for stuffing boxes, bearings, and shaft.

I intend wherever I see fit to omit the use new, I will, therefore, only state that I in-.

tend to use this pump or turbine, as the .case may be, with either a blade of curved cross sectiorr as shown in Figs. 4, 5, 6, or with a blade which has a screw form as in Fig. 7, preference being given to a blade of curved cross section and so formed that its advancing edge is approximately a straight line and in which the curvature of its cross sections taken at right angles to the radii and on different arcs of revolution constantly diminish with their distance from the center of revolution and when projected on a plane lltllii .the distance therefrom increases.

at right angles to the radius and parallel to the axis of the shaft will give sections approximately as shown in Figs. 5 and 6, in which the angles of curvature are more nearly parallel to the axis of the shaft near the center of revolution and tend to curve at right angles to the axis of the shaft as These forms of blades are not new, neither is the form of runner nor is the.use of diffusion blades in pumps and turbines new and I therefore do not claim these things in themselves but I do claim their use in connection with this form of pump or turbine.

When used as a turbine the mode of operation islthe opposite of the method just de- I scribed, that is; the fluid would enter at 3 pass through 4 and 2, or only 2, thence to the discharge' I claim:

1. An axial flow pump or turbine com prising a rotor chamber having suction and discharge volutes gradually decreasing cross sectionally and designed to impart to fluid passing therethrough a rotary motion of constant velocity, and registering with the rotor chamber by means of an annular opening of constant width in the side of the volutes next to the rotor chamber and forming a part thereof and adapted to impart to the fluid an axial component of flow.

2. In an axial flow pump or'turbine, comprising a casing having a cylindrical rotor chamber, a shaft journaled in suitable bearings and a rotor upon the shaft within said chamber, said casing being provided with suction and discharge volutes which are gradually decreasing cross sectionally and designed to impart to the fluid passing therethrough a rotary motion of constant velocity and registering with the rotor chamber'by means of an annular opening of con stant width in the side of the volute next to the rotor chamber and forming a part thereof 7 and adapted to impart to the fluid an axial component of flow.

EUGENE FRANK DELERY Witnesses:

ALEXANDER ALLISON, J r., DAVID P. NIcoLL.

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