Reciprocating steam engine with an oscillating cylinder. Drawing, description

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Piston steam engine with oscillating cylinder. Tips for a modeler

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Piston steam engine with oscillating cylinder
Piston steam engine with a rocking cylinder: 1 - steam inlet pipe (copper tube, solder in hole B of part 2; solder a similar pipe in hole G of steam outlet), 2 - engine frame (steel sheet 4 mm thick), 3 - M4 nut, 4 - spring pressing plate 6 to frame 2, 5 - cylinder swing axis (steel wire with a diameter of 4 mm with M4 thread), 6 - plate (bronze, soldered on parts 16), 7 - flywheel, 8 - crank axis (steel wire with a diameter 4 mm), 9 - bronze bearing bush, 10 - crank pin (steel wire 4 mm in diameter, pressed into parts 11), 11 - crank web (steel sheet 5 mm thick, pressed and riveted onto parts 8), 12 - plate balancer, 13 - piston rod, 14 - bottom cover of the cylinder with a guide hole for the piston rod (make four holes with a diameter of 2 mm to purge the under-piston space), 15 - piston (fit to the inner size of the cylinder, make two sealing grooves in accordance with the figure) , 16 - cylinder (metal tube with a diameter of 16 x 1 mm and a length of 50 mm), 17 - the upper blind cover of the cylinder (solder into part 16 after assembly, like part 14)

Shown below is a prism installed in place of a plate as recommended in the book Technical Creativity.

The steam engine he built is easily reproducible in almost any conditions. Its advantage is the absence of complex, requiring precision processing and assembly of elements for distributing the inlet and outlet of steam from the cavity of the working cylinder. The main requirements for the quality of manufacturing of the components of this engine are the ease of movement of all moving parts, the absence of jamming, as well as a good fit of the piston to the working surface of the cylinder.

Particular attention should be paid to grinding the rubbing surfaces of the plate and frame soldered to the cylinder in the area of the inlet and exhaust holes. Here we can recommend the solution proposed in the book "Technical Creativity" (publishing house "Young Guard", Moscow, 1956), where drawings and a description of just such a design (only slightly smaller and powered by compressed air) were published. There, not just a plate was soldered onto the cylinder, but a special prism with two relatively narrow friction belts spaced apart in height. This provides not only improved lapping and less mechanical losses, but also better clamping of the zones that act as a spool and are under the influence of steam pressure (the greater the pressure, the stronger the rubbing parts must be compressed).

This steam engine can be installed on model ships in any position convenient for layout. Torque transmission - rubber belt or gears; depending on this, a pulley or gear is fixed behind the flywheel on the shaft.

Such a steam engine works well when powered by a soldered tin-boiler heated by dry alcohol tablets. In this case, however, it is necessary to strictly observe the safety rules for medium-pressure steam generators.

Author: V. Abramov

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