US1473391A

US1473391A - Turbine-gate-operating mechanism

Info

Publication number: US1473391A
Application number: US578393A
Authority: US
Inventors: Taylor Harvey Birchard
Original assignee: Individual
Current assignee: Individual
Priority date: 1922-07-29
Filing date: 1922-07-29
Publication date: 1923-11-06
Anticipated expiration: 1940-11-06

Description

Nov. .6, 1923. 1,473,391

7 H. B. TAYLOR TURBINE GATE OPERATING MECHANISM 2 Sheets-Sheet 1.

7 Filed July 29. 1922 Nov. 6 1923.

H. B. TAYLOR TURBINE GATE OPERATING MECHANISM 2 Sheets-Sheet 2 Filed July 29 Q 1922 mini Ill/ll wig Patented Nov. 6, 1923.

umren STATES imam HARVEY BInoHAnn TAYLOR, or PHILADELPHIA, PENNSYLVANIA.

TURBINE-GATE-OPER-ATING MECHANISM.

Application filed July 29, 1922. Serial No. 578,393.

:' ing rings by fluid pressure in a pair of operating cylinders having parallel pistons on opposites sides of the ring. This has involved a considerable extension of the overall dimensions necessary for the operating mechanism and has required the running of long piping connections to the opposite cylin'ders.

The object of the present invention is to provide operating mechanism of reduced overall dimensions such that both cylinders may be compactly assembled within a single chamber alongside of the operating ring and with short fluid pressure pipe connections between the cylinders.

In the accompanying drawings illustrating the invention *ig. 1 is a plan view of a portion of a turbine gate operating mechanism,

Fig. 1 is a diagram illustrating the action of the operating forces in the Fig. 1'mecha nism,

Fig. 2 is a view similar to Fig. 1 showing a different form of turbine.

Fig. 3 is a vertical sectional view on line 3-3 of Fig. 2, and 1 F ig. 4 is a vertical sectional view 'on line 4-4 of Fig. :2. a

In the plan view shown in Fig.1 the in vention is illustrated as applied to the ordinary conventional setting of turbine with a downward discharge and with the operating ring inside the guide vane circle. In this structure a pit'liner 5 with flange 6 surrounds the floor plate 7 of the turbine cover plate above which is mounted the operating mechanism. The stems of the guide vanes extend upward through the cover plate-and have keyed thereon the arms 8 connected by links 9 of the operating ring 10 turning on bearings 11 supported from the turbine cover plate.

To move the operating ring 10 and ad ustableguide vanes the cylinders A and B are provided having their axes on the same side of the operating ring and meeting at an angle 0: which in the specific embodiment r cries. I

shown is less than 90. This permits the cylinders A, B to be chamber close together and thus saves in the overall dimensions of the operating mechanism. This chamber is provided by an extension 12 of the pit liner 5, the head ends of the cylinders A,1B being fastened to the wallsof the xtension at 13, 14.

' In order to rotate the operating ring 10 to move the vanes, fluid pressure is admitted to cylinders A, B. :For clockwise movementof the operating ring pressure is admitted through the pipe opening 15 to the rod end of cylinder A and the head end of cylinder B while pressure is exhausted from the opposite ends of these cylinders through pipe opening 16, the

pipe openings

15 and 16 being connected to any desired remote point of supply and control. To reverse the move ment of ring 10 pressure will be supplied through pipe opening 16 and exhausted through pipe opening 15' The

crossover piping

15, 16 is arranged as a single casting bolted to the two cylinders and it may also be desirable, for instance in small in .stallations, to form the cylinders A, B as a single casting. I p

With the cylinders A, B thus located together, housing means for the cylinders need be provided only on one side of the pit linerv in the most convenient location with relation to the remainder of the installation. The cross connections of piping between the cylinders is also simplified and shortened and in case of inspection orrepair'both cylinders are accessible at the same time in a single compartment.

positioned in a single With the operating mechanism of this invention there is a small resultant sid thrust produced by the. action of the rods c. 6 against the on the operating ring bearing is also equal to F -l-F The arrangement comprising this'invention requires a somewhat greater side thrust F on the bearing than two par.

bearings 11 supporting the opcrating ring. This is shown chagrammatr allel cylinders, but this side thrust is very much smaller than that which would be produced by a single cylinder. It will he noted from the diagram of Fig. 1 that for the particular angle a employed in Fig. 1 the value of F is considerably less than either F or F and is therefore quite small in comparison with the sum of F and F In general F and F will not be exactly equal owing to the area of the piston rod or piston trunk. In cases where F is approximately equal to F as shown in dotted lines in Fig. 1, the side thrust on the hearing would amount to approximately It is therefore seen that a very convenient and compact arrangement of the operating cylinders and pistons can be secured by this invention without causing any excessive side thrust against the operating ring hearing.

In the modification shown in Figs. 2, 3 and 4: the invention is illustrated in connection with an inverted turbine with the operating ring outside of the vane circle. In this turbine the flow enters horizontally through the speed ring 20 and guide vanes .21 and then turns upwardly to pass through the runner (Fig. The pit liner 25 by its lower flange :26 supports the turbine casing ring 27 through which pass the stems 28 of the movable guide vanes 21. An operating ring 30 rotates in bearings 31 formed on the inner surface of the pit. liner 25 and this operating ring carries studs 32 linked as indicated at 33 to the arms 3 of guide vane stems 528. The pit liner 25 is sup-ported from the speed vane ring 20 as shown.

To move the operating ring 30 and adjustable guide vanes 21 cylinders A. I3 are provided positioned in the chamber 4'12 formed by extensions of the pit liner 2'5 and connected by rods 0,, b to the operating ring. The rods 0/. 7) have their axes at an angle a greater than the-angle a (Fig. 1) but less than 90. Crossover pipes 35, 36 are provided for connecting the opposite ends of the cylinders A, B to pressure and exhaust as in Fig. 1 and the operation of this mechanism is in general similar to the described operation of the Fig. 1 mechanism.

In both the structures on": Fig. 1 and 2 the chamber containing the operation eyt inders A B, or-A, B are shown located adjacent the small portion of the volute cas ing as indicated in dotted lines at r, v. where there is ample room for these cylinders. The mechanism of thisinvention is thus easily adaptable to the special conditions of'incliviidual inqallations and while the invention has been illustrated in connecpit and operating mechanism tion with specific structures it not con fined thereto but is intended to cover such modifications thereof as fall within the scope of the appended claims.

I claim 1. A hydraulic turbine having a series of gates and a pair of operating cylinders for actuating said gates, said cylinders having non-parallel axes.

2. A hydraulic turbine having a series of gates and a pair of operating cylinders for actuating said gates, said cylinders having non-parallel axes and being located closely adjacent to each other.

3. A hydraulic turbine having av tar-sine contained within said pit, and a" pair of operating cylinders :tor actuating said mechanism, said cylinders having non-parallel arcs and being contained within a single recess in the wall of. said pit.

1. In a hydraulic turbine a gate operating mechanism comprising a pair of cylinder containing fluid pressure operated pistons connected to an operating ring, said cylinders having non-parallel aXes.

5. In a hydraulic turbine a gate operating mechanism comprising a. pair of cylinders containing fluid pressure operated pistons connected to an operating ring, said cylinders having non-parallel axes and being located closely adjacent to each other.

6. In a hydraulic turbine a gate operating mechanism comprising a pair of cylinders containing fluid operated pistons connected to an operating ring by means of pin connections, the axes of said cylinders being non-parallel and substantially tangent to a circle about the turbine axis containing said pin connections.

7. In a turbine gate operating mechanism the combination with an operating ring of a pair of oi 'ierating cylinders the-rotor having axes on the same side of said ring and meeting at an angle of less than 90.

8. In a turbine gate operating mechanism the combination with a turbine pit of an operating ring rotatably mounted within said pit, a chamber forming a recess in the wall of said pit and a plurality of non-parallel operating cylinders positioned in said chamber and connected to move said operating ring.

9. A hydraulic I turbine ha ring a turbine pit liner and operating mechanism contained within said liner. and a pair of open ating cylinders i'or actuating said mechanism. said cylinders'hemg containedwithin a s ngle chamber-formed by an extension of the walls ot li.ner;-- i

' i niiivnr Bison-Ann Tarpon.