SU936A1 - Steam-driven steam engine with variable piston stroke - Google Patents

Description

Taking into account the fact that in steam locomotives, at high speed, the pressure on the piston is sometimes significantly less than the pressure in the boiler, due to low steam supply (especially in steam engines of the compounding system) and a rapid increase in the volume of the steam chamber in the cylinder from forced movement. a piston, a method is proposed for maintaining the locomotive's speed and power by changing the arms of the levers that transmit the force of the piston to the wheels, i.e. the crank arms at the point of application of force to the wheels.

FIG. 1 shows three projections of a locomotive drive wheel with a movable crank pin and a movable counterweight, and FIG. 2 shows a sliding piston of a locomotive.

The driving wheel of a locomotive has two opposite pairs of spokes arranged parallel to 1, 1 to 2, 2. Along parallel needles, with the help of a screw 5-4, with right and left threads, the nut pads 5 and b are moved. bearing the crank pin 7 on one side and the counterweight 8 on the other; the threading at the ends of the screw 3-4 is done in the opposite direction, and the screw itself passing through the wheel hub is reinforced with the ends in the wheel rim and fitted at the ends with cylindrical gears 9 and iO, which can engage when rotating the wheel with the gear arcs And and 12 controlled by the driver with the help of a lever that has three positions: central, when arcs ii to 12 do not touch gears 9 and 10, and two extreme ones: one that increases the distance of the crank pin and counterweight from the center of the wheel axis and, therefore, increases the application arm the force of the piston, and another, I reduce his ear.

The sliding piston of FIG. 2 consists of two disks 13 and / 4, which sit on the rods, of which the stem 16 of the second disk M is integral and enters the hollow rod 15 of the first disk 13; each rod is bonded to the frame; the disc shaft 13 with the outer frame / S, and the disc stem f4-with the inner frame 17. Both frames are linked by ends with a screw 19, having right and left slicing, so that when the screw 19 is rotated, one or the other side of the frame 17 and 18 is moved apart or piston discs, or shift them. Screw head 19 enters inside

crosshead 20 and ends with a bevel gear 21 coupled with the gear of a vertical shaft 22 carrying ratchet disks 23 to 24 to ratchet clutch 24 moved by rods 25. With the help of ratchets, screw 19 can rotate in one direction or another, and therefore piston disks can move apart or shift to increase or decrease the volume of the cylinder chamber.

Both of the above mechanisms are interconnected and controlled by the driver using a common lever or pneumatically.

SUBJECT OF THE PATENT.

Steam engine with variable piston stroke, characterized by using a mechanism for changing the crank arm, consisting of movable, between parallel wheel spokes, counterweights 8 and fingers 7 of the cranks, restarted using screw 5 - 4c and left-handed thread passing through a hub of a locomotive wheel and fitted with gears 9 to 10 for turning it in different directions when coupling to arcs 11 and 12, which mechanism is connected with the mechanism for changing the width of the piston consisting of sliding halves 13 and 14 n floor 15 and solid rods 16 with one input to another conductive frames 17 and 18 to be installed at a desired distance between them by means of screws 19 on the right and left-hand threads, the rotatable bevel gear 21-22 of the rods 25 through the ratchet clutch 25, 24.

to patent S. I. BEDNYAKOV No. 936.