US358374A

US358374A - Rotary engine

Info

Publication number: US358374A
Authority: US
Publication date: 1887-02-22
Anticipated expiration: 1904-02-22

Description

J' BEYSTRUM s sheetssheen 1.. RIOTARY ENGINE.I l Patented Feb. 22, 1887 lll/lill (No ModeL) (Nb Model.) 3 sheets-sheet 2;

J. BBYSTRUM. ROTARY ENGINE.

No. 358,374. y Patented Feb. 22, 1887.

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A (No Model.) 3 sheet-sheen a..

' J. BEYSTRUM.

- ROTARY ENGINE.

Patented Feb. 2 2

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UNITED STATES PATENT GEEicE.

JOHN BEYsTRUM, or rirrsuae, PENNSYLVANIA.v

ROTARY ENGINE.

SPECIFICATION forming part of Letters Patent No. 358.374, dated FebruaryZZ, 1887.

Application filed August 6, 1886. Serial No. 2l0,185. (No model.)

To all whom it may concern:

- B e it known that I, JOHN BEYsrRUM, of Pittsburg, in the county of Allegheny and State of-Pennsylvania, have invented a new and useful Improvement in Rotary Engines; and I do hereby declare the following to be a full, clear, and eXact description thereof.

My invention relates to rotary steam-engines, its principal objects being to provide a simple and positive means of operating the pistons within the engine-cylinder and rotary head, to confine the steam within the steam-charnloer and pack the chamber, to guide, support, and pack the pistons in their movement within the cylinder and rotary head, and tolubricate the bearings of the piston-journals.

My invention consists, essentially, in combining with the engine-cylinder a rotary piston-head secured ccncentrically upon the power-shaft and eccentrically within the cylinder, astationary pin extending through the cylinder-head and extending into the space within the piston-head, arms or vpitmen journaled on said pin, and sliding pistons pivoted at the outer ends of the pitmen and sliding through the piston-head, the pitmen acting to' hold the pistons in contact with the interior wall of the cylinder as the piston-head rotates therein.

It also consists in means for lubricating the journals of the pitrneu through the stationary pin on which they are mounted.

.It also consists in certain other improvements in the construction of the engine and the parts thereof. v

To enable others skilled in the art to make and use my invention, I Will describe the same more fully, referring to the accompanying drawings, in which- Figure 1 is a vertical central section of my improved rotary engine. Fig. 2 is a plan view, partly in section, of the bed-plate. Fig. 3V is an end View, the cylinder-head and side disk being removed, and the lower half being shown in section. Fig. 4 is a perspective View of the pistons removed from the head. Fig. 5 is a perspective view of part of lthe side disk; and Fig. 6 is a sectional view of the stationary pin and pitmen, showing the manner of lubricating the journals thereof.

' Like letters of reference indicate like parts in each.

The engine shown is a compound engine having the live-steam cylinder A and the eX- haust-steam cylinder B, the steam passing from. one cylinder to the other through port-s or passagesin the bed-plate C, on which the cylinders are supported, as hereinafter particularly described.

The construction of the cylinders is the same, the exhaust-cylinder and parts contained therein being increased in width according to the necessary enlargement of the steam-space therein. i

The cylinders A B are secured at opposite ends of the bed-plate C, and the power-shaft D extends between the two cylinders, carrying the band wheel or pulley d, from which the rotary motion generated in the engine is transmitted. The cylinders are bolted to the bed-plate at b and are formed of the cylinderbody c and the cylinder-heads a a2, the head a. having the hub c3 extending out therefrom, within which isjournaled the power-shaft D, thejournals for said shaft being shown at d at the outer ends of the hubs a3. carries at each end the rotary piston-head E, which is provided with a collar, f, extending within the enlargement aAk of the hub c3 and keyed to the shaft, as at f, the shafts not eX- tending into the piston-head, for the reason that the space therein is required for the operation of the pistons.

The piston-head E is provided with the side plates or disks, F F', which arerigidly attached to the piston-head, and in the preferred construction t-he collar f is found as part of 'the disk F, and the disk is secured rigidly to the piston-head by bolts. These disks or plates F F are of greater diameter than the steamspace K of the cylinder, and extend into annular recesses Kthereiu, formed between the cylinder-body c and the cylinder-heads a c2,

The shaft D f the annular recesses K and the side plates, F

F', being concentric with the power-shaft D.

the reception and operation of the stationary pin P, and the pistons G G', pitinen or arms H H', hereinafter described, and has the guideslots e, in which the pistons slide. The pistonhead is mounted on the power-shaft D, eccentrically to the steamspace K of the cylinder, the piston being in contact with the interior wall, k, thereof at the base of the steam-space, and, if desired, a spring or steam actuated packing-plate, K', at the base of the cylinder' bears against the piston-head, steam being admitted between the plate K, through holes K5, from the cored-out portion K, which communicates with the steam-inlet L, as shown in the drawings.

Ports Z Z m m' communicate with the steamspace K through the interior walls, k, on each side of the point of contact with the pistonhead-the ports Z' m' near said point of contact, and the ports Z m at points just below a line drawn horizontally through the center of the cylinder-space K, the ports Z' m communicating with the ports Z m. These ports communicate through the slide-valve N with the steaminlet L and the exhaust-passages M M', on each side thereof, in the bed-plate C, the steam entering at L, passing thence through the central opening, n, in the slide-valve into the port Z, and through said port and the auxiliary port Z' into the steam-space K, and thence through the ports m m' and around one end of theslide-valve into the exhaust-passage M, and on the reversal of the engine, by the movement of the slide-valve, the steam passing in the opposite direction through the steam-space and exhausting from the ports Z into the exhaust-passage M'. The valve N is operated by a lever, n', by means of the rod n, extending through the stuffing-box n3, its movement being limited by the setscrew a'.

Extending in the interior of the pistonhead E at the center of the interior space, K, of the cylinder is the stationary pin P, supported in the collar a5 on the cylinder-head a2, the side plate, F', having a central opening, f2, to permit it to rotate around the collar a5. Journaled on said pin are the pitmen or arms H H', the pitman H having the singlejournal h, and the pitman H' having the two journals h'; and journaled at the outer ends of the pitmen are the pistons G G', the pitmen having journals h, through which pins h* pass. As the steam passing into the space K through the ports Z Z' presses against the pistons it forces them around the steam-space,imparting the rotary motion to the piston-head, and as the head rotates the pistons are projected out of the head and drawn into it by the pitmen journaled to the stationary pin P, the pitmen turning on the pin and the pistons swinging slightly on the ends of the pitmen and being held in contact with the Walls k of the cylinder by the pitmen, the movement of the pitnen and pistons being indicated by dotted mes.

To accommodate for the necessary swinging of the pistons on the pitmen, on account ot' the different centers of the piston-head and the stationary pin,the steam-space K is slightly higher than wide, and when the head is turned in the position shown in Fig. 3, as the guideslots e extend radially from the center of the head and the pistons are projected on that line, the pitmen conform to that line, though working from the pin P asa center, and hence the distance from the pin p to the wall k at that point is less than at a line drawn through the centers of both the head and the pin P, where the pitmen and pistons are necessarily 011 the same line. As the steam presses against the pistons where theyprojectbeyond the pistou-head and thus causes the rotation of the engine, one or the other piston is always projected beyond the head and receives thepressure of the steam. The piston passes the lower steam-port, Z', before it is projected far beyond the head at the commencement of its stroke,and back-jnessure upon it is thus prevented, and when a greater surface of piston is exposed steam is supplied through both ports Z Z', and in like manner the steam is first exhausted through both ports m m', and the port m' receives the exhaust-steam until the piston is almost withdrawn at the end of its stroke. As the side plates, F F', rotate with the piston-head and pistons, I form in their inner faces guiding-grooves 1*, in which the edges of the pistons move, the pistons being thus supported in their stroke by the side plates, as well as the piston-heads and in order to close the upper ends of these grooves and prevent the escape of steam through them between the cylinder body and plate, I form at the outer ends of the pistons the lips g', which extend a short distance beyond the interior wall, 7c, of the cylinder, and as the pistons are held continuously in contact with the wall 7c, they thus prevent the escape of steam around them. In order to allow for slight irregularity in the interior wall, 7c, of the cylinder, or in regular movement of the pitmen or pistons,I form spring-actuated packing-bars g2 at the ends of the pistons, these bars pressing against the interior wall, 1c, continuously; and t-o form steam-tight joints between the pistons and the bases of the grooves r in the side plates in which they slide I provide spring-actuated packing-bars r in the side edges of the pistons, all the edges of the pistons exposed to the steam-pressure being thus suitably packed.

In order to lubricate the journals h h' h2 of the pitmen, I form in the stationary pin P the bore p, extending centrally from the outer end past the journals h h', and secure at the outer end of the pin the oil-cup p', communicating therewith. Extending through the lower part of the pin P and com municating with the bore p are the oil-holes s s'-the oil-hole s in the center of thejournal h and the oil-holes s' within thej onrnals/ the oil-holes thus furnishing oil to lubricate these journals. It is necessary also to lubricate the journals h2, and to aecomplish this I form the oil-holes s', extending from the pin P through the body of the pitnlan H to thejournal h' thereof, andI provide the pitman H' with the web or body h3, fitting close to the journal hof the pitman E, and form through said journal h the oil-hole sa, and

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opposite said hole the oil-hole 3*, extending through the web h3 to the journal h2 of said pitman H', the end of the hole st, next the hole s3, being enlarged to catch any oil passing through the same and feed it to said journal h2.

In Fig. 2 is shown the bed-plate C, illustrating the manner in which the steam enters the cylinder A, and passes thence Vto the exhaustcylinder B. The steam enters through the supply-pipe tinto the central steam-inlet, L, in the bed-plate, and rising thence through the port c and the central opening, a, in the slide-Valve N to the port Z or lm, according to the position of said valve. After passing through the cylinder A it passes through the port c or c'L into the exhaust-passage M orM, at the side of the central steam-inlet, L. These passages M M', after passing beyond the steaminlet L, which is closed by an end wall, unite in the longitudinal passage M2, which extends within the bed-plate to the exhaust-cylinder B, and the steam enters through the central port, b3, and valve N into that cylinder, and after passing through the same passes through the port b' or bZ into the exhaust-passage U or U', on each side of the passage N. The passages U U' then unite at the end of the bedplate and communicate with the steam-outlet U2, to which the exhaust-pipe u is connected.

The slide-valves N in the two cylinders are connected by the rod N2, to which the lever N' is keyed, and which extends'to the opposite end of the engine and operates the slidevalve therein.

When the engine is in operation, steam enters at the port t, passes into the steam-inlet L, thence through the ports Z Z into the cylinder-space K, or the live-steam cylinder a, and pressing .against thepistons G G imparts a rotary motion to the piston-head and through it to the power-shaft, and passes out through the ports m m' into the exhaust-passages M or M' in the bed-plato. It then passes through the longitudinal passage M2 to the exhauststeam cylinder B, and passes through the same course therein, the pressure of the expanded exhaust-steam being thus utilized to increase the power of the engine, and to cause the more even rotation of the shaft than where power is only applied at one side of the point from which the rotary motion generated is.

transmitted to the mechanism to be operated. rIhe engine is simple in construction, and as there are but few parts it is not liable to wear or get out of order. Practical operation has proved that a speed as high as fifteen hundred revolutions per minute can be obtained.

' What I claim as my invention is- 1. In rotary engines, the combination, with kthe piston-head secured concentrically to the power-shaft and rotating within the steamspace eccentrically therein, of the stationary pin extending in the center of the steam-space and within the piston-head and being supported therein by a collar formed on the inner side of the cylinder-head, the pitmen journaled thereon, and the pistons pivoted to the pitmen and sliding within the piston-head, substantially as and for the purposes set forth.

2. In rotary engines, the combination, with the cylinder, of the piston-head rotating Within the steam-space thereof and having side plates or disks provided with guiding-grooves and the sliding pistons fitting into said grooves and having spring-actuated packing-bars on their side edges Within said guiding-grooves, substantially as and for the purposes set forth.

3. In rotary engines, the combination, with the cylinder, of the hollow piston-head E, secured concentrically on the power-shaft and rotating eccentrically Within the cylinder, the side plate, F', thereof having the central opening, f2, and the stationary pin I), extending through said opening into the rotating pistonhead, substantially as and for the purposes set forth.

4t. In rotary engines, the combination of the cylinder having the hub a3 extending out at one side thereof, the power-shaft D, j ournaled in said hub, the piston-head E, and the side plate or disk, F, rigidly secured to the pistonhead and provided with the collar f, secured to the power-shaft within the hub a, substantially as and for the purposes set forth.

5. In rotary engines, the combination of the stationary pin I), extending through the cylinder-head and having the central bore, p, and oiling-hole s, and the pitman H, mounted on the pin I?, by means of the journal h, and having the journal and provided with the oil-hole s, extending from the journal h to the journal h2, substantially as and for the purposes as set forth.

6. In rotary engines, the combination, with the stationary pin P, extending through the cylinder-head and having the central bore, p, and oiling-hole s, of the pitmen H H', mounted o n said pin, said pitman H having the oil-hole s3 in its journal lr, and said pitman H' having the oil-hole s* opposite said oil-hole s3 and extending to the journal h2 of said pitman, substantially as and for the purposes set forth.

7. The bed-plates for compound rotary en gines, having the supply-pipe t, central steaminlet, L, and exhaust-passages M M' at the sides of theinlet L, said exhaust-passages M M' uniting in the longitudinal passage M, leading through the bed-plate to the exhaust-steam inlet at the opposite end of the bed-plate, substantially as and for the purposes set forth.

8. In rotary engines, the combination of the bed-plate, the live-steam cylinder A at one end, the exhaust-steam cylinder B at the other IOO IIO

end, and the power-shaft D, carrying rotary piston-heads in said cylinders and having the band-wheel secured thereto between said cylinders, substantially as and for the `purposes set forth.

In testimony whereof I, the said JOHN BEY- STRUM, have hereunto set my hand.

JOHN BEYSTRUM. Witnesses:

JAMES I. KAY, J. N. COOKE.