US638260A

US638260A - Steam-turbine.

Info

Publication number: US638260A
Application number: US69120998A
Authority: US
Inventors: James Harry Keighly Mccollum
Original assignee: Individual
Current assignee: Individual
Priority date: 1898-09-17
Filing date: 1898-09-17
Publication date: 1899-12-05
Anticipated expiration: 1916-12-05

Description

nufsaagao.' Patented nec. 5, |899.

J. H. K. MCCLLUM.

STEAM TURBINE.

(Application filed Sept. 17, 1898.)

(No Model.)

.ul IHM* @M0/1g SW mi Nonms Farms w.. Puo'roumm WASHINGTON. o. c.

. niTn-n STATES PATENT Tirion,

STEAM-TURBINE.

snoI'FIcA'rIoN forming part of Letters Patent No. 638,260, dated December 5, 1899;

Application iiled September 171898. Serial No. 691,209. (No model.)

To all whom it may concern: I

Beit known that I, JAMES HARRY KEIGHLY MCCOLLUM, electrician, of the city of Toronto, in the county of York, in the Province of Ontario, Canada, have in vented certain new and useful Improvements in Steam-Turbines, of which the following is a specification.

My invention relates to improvements in steam-turbines, and more particularly toY those of the Parsons type; and the object of the invention is to design a simple and effectual arrangement for introducing the steam into the diderent cylinders whereby the engine may be effectively reversed at the same speed when required; and it consists, essentially, of separating the three cylinders and providing ends for the saine, the steam-inlet pipes being arranged on one side, so as to introduce the steam into each cylinder at the front end and exhaust at the rear end and at the other side to introduce the steam into the rear end first and exhaust at the front end into the next succeeding cylinder `and ending at the low-pressure one, the parts being constructed and arranged in detail as hereinafter more particularly explained.

The drawing represents a sectional plan, showing my improved engine.

A is the high-pressure cylinder, B is the intermediate cylinder, and C is the low-pressure cylinder, which, as will be noticed, are all of increasing diameters, starting at `the high-pressure cylinder. The cylinders A, B, and C are provided with suitable heads a 0;',

' b b, and c c.

D is the main shaft, which extends through the three cylinders and is provided with suitable packing and bearings. The shaft in the cylinders is provided with drums A', B', and C,as indicated by dotted lines, and obliquelyset wings a2, b2, and c2, secured to such dru ms. To the inside of the cylinders are secured alternately with the Wings the `directing-vanes a3, b3, and ci?, respectively. The vvanes and wings are arranged identically to that of the Parsons engine.

E is the main inlet steam-pipe, and E is a branch pipe leading from the port e of the valve-chest F to the port e at the front end of the cylinder A.

E2 is a pipe leading from the port e2 at the rear end of the cylinder A to a port e3 at the front end of the cylinder B;

E3 is a pipe leading from a port c4 at the rear end of the cylinder B to a port c5 at the front end of the cylinder C.

e6 is a iinal exhaust-port, and E4 is the pipe leading therefrom at the rear end of the cylinder C.

fis a port in the valve-chest F at the opposite side to' that of the port e.

F is a pipe leading from the port f to the port f at the rear end ofthe cylinder A.

F2 is a pipe leading from the port f2 at the front end ofthe cylinder to the port f3 at the rear end of the cylinder B.

- F3 is a pipe leading from the port f4 at the front end of the cylinder B to the port f5 at the rear end of the cylinder C.

f6 is the final exhaust-port on this side, from which leads the exhaust-pipe F4.

It will be noticed that on each side of the cylinders, which are separated, as shown, the exhaust-pipe from one cylinder is the inletpipe to the next succeedingeXpansion-cylinder and that the ports are larger at the exit than at the entrance, as usual, but the eX- haust-port at the exit end of the steam-pipe is equal to the inlet-port of the next succeeding cylinder. All the ports at each side are provided with slide-valves or anyother suitable form of valve, those on one side being -designed to be acted simultaneously, so as to throw open all the inlet-ports and 'the exhaust-ports. The same may be said of the other side.

The valve controlling the ports e e2 c3 e4 e5 e6 I designate 2 8 4 5 6 7. The valves controlling the ports ff2f3f4f5f on the o pposite side I designate 8 9 lO 11 12 13. The valves 2 and 3 I connect together by a valve-rod G, which is connected to a rocking bar I-I, suitably pivoted on the frame of the machine and operated either by hand or by a steampiston l, as indicated. The valves 4 and 5 are connected by a rod tl,rwhich is connected to the rod G by a lever j, suitably pivoted. The valves 6 and 7 are connectedby a rod K, which is connected to the rod J bythe lever la.

On the opposite side the Valves 8 and 9 are connected together by the rod L, which is connected to the rocking bar H at one end and at the other to the lever Z. The valves 10 IOO and 1l are connected together by the rod N, which is connected at one end to the lever t and at the other end to the lever fn. The valves 12 and 13 are connected together by the rod N', which is connected at one end to the lever n.

O is the throttle-valve, Whichlis connected by the rod o to the steam-cylinder P, bywhich the throttle-valve is controlled.

Although I have shown all the cylinders on the one shaft, it will ot' course be understood that they might be on different shafts, if desired.

The operation of my invention is as follows: In the drawing the throttle-valve O is arranged so as to leave the port e-uncovered, and the rocking arm H is also placed in such a position that all the ports e', c2, c3, e4, e5, and e are left uncovered by their respective slide-valves. It will therefore be quite clear that the course of the steam from the steampipe E through the pipes and various cylinders out through the exhaust-port will cause the drums in the various cylinders to be rotated in the direction indicated by arrow. To reverse, it is necessary to tilt the rocking bar on its pivot, soas to throw all the valves open on the opposite side to that hereinbefore mentioned and close those that were open on the other side. By manipulating the throttle-valve O so as to close the port e and open the port f, which has previously been closed, the course of the steam is directed through the pipes and cylinders on the opposite side, hereinbefore referred to, and as the steam first enters each cylinder at the rear instead of the front the rotation of the Wings on the drum of each cylinder will of course be, in the opposite direction to that indicated by arrow, and consequently impart a like rotary movement to the shaft.

In this specification, which describes simply my invention, it will of course be understood that the forms of the pipes, valves, and other details of construction may be varied without departing from the spirit ot' my invention.

What I claim as my invention is l. The combination With the high, intermediate and low pressure cylinders provided with stationary directing-vanes and the alternately-arranged rotating vanes or wings attached to the driving-shaft each cylinder being separated and provided with suitable heads, ot' suitable ports at the frontand rear of each cylinder of increasing size from the smallest to the largest, suitable valves for such ports and suitable pipes at one side of increasingv size from the smallest to the largest connecting the ports, such pipes being connected from the rear end of one cylinder to the front end of the next succeeding cylinder and having the iin al exhaust at the rear end of the last cylinder and suitable pipes at the opposite side of increasing size from the high-pressure to the low-pressure cylinder and having the inlet-pipe leading into the rear of the cylinder and the outlet or exhaust at the front of the cylinder or vice versa to the pipes at the opposite side and a suitable throttle-valve for admitting the steam into the high-pressure cylinder from either steampipe as and for the purpose specified.

' 2. The combination With the high, intermediate and low pressure cylinders provided with stationary directing-vanes and the alternately-arranged rotating vanes or Wings attached to the driving-shaft each cylinder being separated and provided with suitable heads, of suitable ports at the front and rear of each cylinder of increasing size from the smallest to the largest, suitable valves for lsuch ports and suitable pipes at one side of increasing size from the smallest to the largest connecting the ports, such pipes being connected from the rear end of one cylinder to the front end of the next succeeding cylinder and having the final exhaustat the rear end of the last cylinder and suitable pipes at the opposite side of increasing size from the high-pressure to the low-pressure cylinder and having the inlet-pipe leading into the rear of the cylinder and the outlet or exhaust at the front of the cylinder or v'ice versa to the pipes at the opposite side, a suitable throttle-valve for admitting the steam into the high-pressure cylinder trom either steampipe and means whereby when the one set of valves is closed on one sidethe opposite set ot' valves on the other side of the cylinders is simultaneously opened as and for the purpose specified.

JAMES HARRY KEIGHLY MCCOLLUBL Vitnesses:

B. BOYD, A. A. McADAM.

IOO