DE21706C - Expansion apparatus for steam engines - Google Patents

Description

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PATENT OFFICE

PATENT LETTERING

CLASS 14: Steam Engines.

WILLIAM VOIT in SAN FRANCISCO. Expansion apparatus for steam engines.

Patented in the German Empire on January 26, 1882.

The present expansion apparatus is mainly intended for direct-acting steam pumps, but can also be used with other steam engines.

In Fig. Ι is a vertical section through the Apparatus and partly also a vertical section through the high pressure cylinder of a compound machine, to which the apparatus is attached is shown.

Fig. 2 shows a side view of the apparatus.

P ¹ is the pipe which connects the apparatus with the steam boiler, S is the cylindrical valve housing, S ^ the steam inlet ^{valve and / i} the steam supply pipe for the valve body. S ² is a small stuffing box through which rod Q of the steam inlet valve goes. A small piston Q ^{1 is} attached to this rod Q and moves in the cylinder .S ^3. Y ¹ is a bracket which connects the valve housing 5 to the piston cylinder, S ³ . A small cylinder S ⁴ is molded with the cylinder ³ .S in one piece and connected to it through the channels / ^3/4. P ⁴ P ⁴ are tubes that / ⁴ connect the channels / ⁸ with the Hochdruckcylinder. E ¹ is a piston-shaped expansion valve which contains a small through- ^{channel / 5} so that the steam pressure on both sides of the same can equalize and water, which should collect on one of the two sides of the cylinder, can also flow through this channel. The slide rod T ^2, which is attached to E ^1, pushes with its front end loosely through a muff V ^s and is provided with adjustable stops uu. The oscillating lever V ² swings around a pin at its lower end, while the upper end is provided with a slot in which the pin V ⁴ attached to the piston rod slides. The expansion slide E ^{1 is} moved by this lever V ² , which moves back and forth uniformly with the main steam piston.

The mode of operation of this expansion apparatus is as follows: When the piston of the high-pressure cylinder begins its stroke, the valve S ^{1 is} in the position shown in FIG. 1. The steam enters the steam inlet duct of the machine and drives the main steam piston to the right. As soon as the lever V ² , which is moved with the piston rod, hits the adjustable stop u , the expansion slide Ε ^Λ also moves to the right. After the piston has exceeded half of the stroke, the slide E ¹ closes the channels / ³ and opens the channels / ⁴ , whereupon the steam flows from the steam cylinder into the housing S ^{4 of} the slide E ¹ , then through the channels "/ ⁴ enters under the piston Q , lifts it and thus closes the steam inlet valve S ¹ connected to this piston.

Can uu because of application of the adjustable stops of the steam at some desired location of the cylinder cut

and by closing the cocks / ⁶ the expansion apparatus can be set to its function.

Claims (1)

Patent Claims: i. An expansion apparatus for steam engines, consisting of the connection of the cylinder £ £ ³ S ¹ with the valves respectively. Piston S ¹ O ¹ and E \ p ⁶ channels / ^3/4/5 and the steam supply pipes P ^ with the shut-off valves. The connection of the expansion slide rod T ² with the adjustable stops uu, the sleeve V ^z , the lever F ² and the pins V ⁱ attached to the piston rod of the high-pressure cylinder to set the expansion slide E * in motion. For this purpose ι sheet of drawings.