US996668A - Rotary engine. - Google Patents

Description

F. G. OLNEY.

ROTARY ENGINE.

APPLICATION FILED mm. 18. 1910.

Patented July 4, 1911.

2 SHEETS-SHEET 1.

1- ki l WIT/M55556 MVENTOZ F. U. OLNEY.

, ROTARY ENGINE.

APPLICATION FILED JUNE 18, 1910.

Patented July 4, 1911.

2 SHEETS-SHEET 2.

UNI ED STATES i-MEET OFF C -Y FREDERICK c. ommr, or SPOKANE, wasnmer'on, .nssreivon or-roarr-rrvnor n r gnpnnnrns T HENRY r. .IDOBLE, or'sromnn, wesnmeron.

eeaeee.

ROTARY ENGINE.

Specification of Letters Patent.

Application filed June 1B, 1910. v Serial No. 567,556.-

To all whom'it may concern:

Be it known that I, FREDERICK C. OLNEY, a citizen of the United States,'residing at Spokane, in the county of Spokane and State of Washington, have invented certain new and useful Improvements in Rotary Engines, of which the following is a specification.

. This invention'relates to improvements in rotary engines of that class characterized by a cylinder, a rotary piston working therein,

and an abutmentbetween the inlet and exhaust ports of the cylinder, said abutment being movable to permit the piston to pass.

The object of theinvention is to provide an improved speed controlling mechanism,

a cut oif valve being provided, and an actu- I 'ating connection between the same and a speed governor deriving its motion from the engine, said connection including a fluid pressure apparatus also driven by the en- In orderthat the invention may be fully understood, reference is had-to the accompanying drawings forming a part of this (specification, in which drawing- 1 Figure 1 is an elevation of the engine;

f Fig. 2 is a cross section, and Fig. 3 a vertical section of portions of the speed controlling apparatus; Fig. 4: is a Vertical section of the engine cylinder taken transversely of the shaft; Fig. 5 is a perspective view of the admission valve; Fig. 6 is a perspective .view of the cut ofl valve; Fig. 7 is a perspective view of the piston wing.

In the drawings, 1 denotes the cylinder of the engine through the center of which a shaft 2 extends. The cylinder has a base 3 which may be formed integral therewith. On the inside of the cylinder is concentrically mounted arotor comprising a disk 4 keyed or otherwise made fast on the shaft 2.

' The diameter of the rotor is less than the internal diameter of the cylinder so that an annular steam space 5 is had in the cylinder. Across this space extends a piston wing or blade 6 which is carried by the rotor, and from which it extends radially. The piston wing is rigidly fastened to the rotor and carries packing strips 7 at its ends which strips are in contact with. the end walls or heads of the cylinder whereby a steam-ti ht joint is had. The acking strips 'are orced outwardly against the cylinder end walls by springs 8 There is no packing between the outer end of'the wing and the cylinder wall, this being'a'groimd fit. .If desired,ftwo or more piston wings may be employed. .Inas- \much as the rotor is fast on the shaft, and

dent'that these parts will rotatetogether when steam or other fluid pressure is admit-- .ted into the, space 5. The engine will also operate asa compressor or pump upon applying power to the shaft 2.

In the base portion of the cylinder are ports 9 and 10, the former being the inlet and the latter the exhaust. Between these ports is located an abutment 11 which di vides the steam space 5 into two parts. This abutment is movable to permit the piston wing 6 to pass; drum'having formed in one side a segmental recess '12. The drum is mounted in a chamber made in the base port-ion of the cylinder and its diameter is such that its'periphery can come in cont-actwith the periphery of the rotor. The length of the drum is also such that it extends entirely across the steam space. It will therefore be evident that a partition is formedin the steam space between the inlet and exhaust ports except during the time the recessed portion is passing therethrough at which time the piston wing passes. a

The abutment is rotated from the shaft 2, said shaft'carrying on the outside of the cylinder, a spurgear 13 whichis in mesh with a similar gear 14 on a shaft 15 which carries the abutment, said shaft extending to the outside of the cylinder.

The inlet port 9 leads from a steam chest 16 formed in the base portion of the cylinder. The steam supply pipe 17 enters one end of the steam chest. In the steam chest is mounted a rotary admission valve comprising a hollow cylinder 18 open at its end which is opposite the entrance of the steam supply pipe. The opposite end of the cylinder is closed and has an axially extending stem 19 which passes out of the steam chest, and carries on the outside thereof a spur gear 20 which is in mesh with a similar gear 21, on the shaft 15. By-this gearing a rotary movement is imparted to the valve from. the shaft 2, said shaft being geared to the shaft 15 as already described. In the cylinthesteam entering said cylinder, and when the wing is fast on the rotor, it will be evider 18 is a slit 18 forming an outlet port for The abutment is a solid enters the steam space 5. .A cut-01f valve is chest and spaced from the wall thereof which leaves an annular space surrounding the cylinder. The blade 22 works in this space on one side of the port 9. On the other side of said port is an abutment 23 which bridges the space and extends into contact with the outer surface of the cylinder. Upon bringing the blade 22 closer to the port 9 the cut-ofl occurs earlier, and upon carrying the blade farther away from the port the cut-off takes place later. The

overnor-controlled means, heretofore reerred to, operate to advance the cut-off when the engine is running too slow, and to retard the cut-off when the engine is running too fast.

The blade 22 is carried by spaced rings 24 encircling the valve 18. From one of the rings extends a tubular stem 25 in which the stem 19 works. Power applied to the stem 25 rotates the blade. Means are rovided for rotating the blade in either direction to advance or retard the cut-01f. These means will now be described.

Geared to the shaft 2 by bevel gears 26 is a shaft 27 carrying an ordinary centrifugal governor 28. The governor shaft 27 is mounted in suitable bearing brackets 29 carried by the cylinder 1. The governor is operatively connected to a sleeve 30 slidably mounted on the governor shaft. To this sleeve is connected an arm 31 connected to the stem 32 of a piston valve having spaced heads 33 and 34 connected by a stem 35.

,This' piston valve works in a. cylindrical casing 36 which is entered intermediate its ends by a pipe 37 leading from a; small rotary pump 38 mounted on the shaft 27 soas to be operated by the rotation of said shaft. The inlet to the pump is apipe 39 leading from a tank or reservoir 40 mounted on a bracket 41 carried by the cylinder 1. The ends of the valve casing 36 are connected with the tank by pipes 42 and 43 respectively. The pipe 37 is the outlet of the pump 38, and it enters the valve casing so as to discharge between the heads 33 and 34.

-Opening into the casing 36 on opposite sides of the'inlet 37 are pipes 44 and 45 respectively which extend to and enter a cylinder 46. The tubular stem 25 extends through this cylinder concentrically and is formed therein with a radial blade or wing 47. In the cylinder 46 is an abutment 48 which extends from the cylinder wall to the surface of the stem 25, the latter being spaced from the cylinder wall, whereby an' annular space is had in the cylinder across .pressure on the blade 47 wi and 45' enter the cylinder on opposite sides of the abutment. It will be evident from the foregoing that whena fluid pressure is let into the cylinder through the 1pipe 44, the carry it around in the cylinder in one direction, and

when the fluid pressure entersthrough the pipe 45, the blade will travel in the opposite direction. Inasmuch as the blade is carried by the stem 25, the latter is rotated, whereby the blade 22 is shifted to vary the cut oif' in the manner hereinbefore described; The position of the valve in the casing 36 determines the fiow of the fluid pressure in the pipes 44 and 45, and as the position of the valve is controlled by the governor 28, it will be seen that changes in the s eed of the engine cause the valve to take different positions and thus let fluid pressure intothe cylinder 46 through one or the other of the pipes 44 and 45, the blade 22 thus being shifted in a direction according to which pipe is discharging into the cylinder. The pipe which is cut off from the casing 36 carries the exhaust fromthe cylinder 46 into one end of the casing from which the exhaust is carried to the tank by the pipe 42 or 43 according to which end of the casing the exhaust is entering.

The distance between the .valve heads 33 and 34, and the width of said heads is such that when the valve is in mid position, which is its position when the engine is running under normal speed, said heads only partly cover the inlet ends of the pipes 44 and 45, and thus establish communication between both of said pipes and the inlet 37. The fluid pressure therefore enters the cyl inder 46 on both sides of the abutment 48, and both sides of the blade 47 are therefore exposed to the pressure. The blade is therefore balanced, and no movement thereof takes place. The piston heads also leave the pipes 44 and 45 partly open to the spaces between the piston heads and the ends of the valve casing 36, so that the pressure can escape through the pipes 42 and 43.

It will be seen from the foregoing that the speed of the engine is under perfect control, the mechanism being reliable in operation and responding instantly to changes in the speed. If the speed becomes sufliciently great, the blade 22 will commence to cover the port 9 and thus reduce the steam supply, and if the speed continues to increase the port will eventually be entirely closed by the blade thus shutting ofl steam to the cylinder 1 altogether.

I claim:

1. The combination with a fluid motor, of a controlling device therefor, a fluid-operated actuating-means for said device, 'a pump for supplying-the motive fluid of the actuating means, and a governor-controlled valve in the motive fluid conduit to the actuating means, said valve comp-rising a casing having an inlet intermediate its ends connected to the pump, outlets to the actuating means on opposite sides of said inlet, and exhaust outlets connected to its ends, and a double-headed piston valve workin in the casing, said valve in its normal position establishing communication between the inlet and both outlets to the actuating means and lloetween said outlets and the exhaust outets.

2. The combination with a fluid motor, of

a controlling device therefor, a fluid oper-- ated actuating means for said device, a pump'for supplying the motive fluid of the actuating means, a reservoir to which the pump inlet is connected, and a governor-controlled valve in the motive fluid conduit to the actuating means, said valve comprising a casing having an inlet intermediate its ends connected to the pump outlet, outlets to the actuating means on opposite sides of said inlet, and exhaust outlets connected to its ends and discharging into the reservoir, and a double-headed piston valve working inthe casing,-said valve in its normal position establishing communication between the inlet and both outlets to the actuating means, and petween said outlets and the exhaust out ets.

In testimony whereof I afiix my signaturein presence of two witnesses.

FREDERICK o. OLNEY,

Witnesses:

H. E. SMITH, Nm'rm KING.

Images