SU22416A1 - Packing rings for pistons and spools of steam and gas machines - Google Patents

Description

The invention relates to packing grooved rings for pistons and spools of steam and gas machines with radial channels pressed against the walls of the cylinder by the action of steam supplied under the rings.

Packing rings for pistons and spools are compressed during idling and form a gap at the cylinder walls, which reduces the resistance of the piston when it moves in the cylinder while the machine is moving without steam.

In FIG. 1 and 2 depict a front view of the packing ring in the extended and compressed positions; FIG. 3- detail of the ring in cross section; FIG. 4-front view of a piston with a packing ring; FIG. 5 is a cross-sectional view along cd of FIG. four; FIG. 6 is a detail of the edge of the ring with rings in a cross section along cd of FIG. four; FIG. 7 is a cross section of ef in FIG. eight; FIG. 8-cross-section of a cylinder with a piston and rings in a compressed position.

The rim of the piston or working spool of the steam or gas machines is supplied with two annular grooves 7, 7, into which two split packing rings 4, 4 are placed. The recesses 2, together with the lower surface of the grooves 7 on the rim of the piston, form annular channels, which communicate with the cylinder cavity through the radial channels 1 in the rim of the piston. The recess 2 in the rings 4 communicates with the recesses 5 of the radial channels 3 located along the periphery of the piston disk in the intervals between the channels 1. The recesses 5 do not reach around the rings to the joints and near the latter are bounded above by flat surfaces 6.

When the machine is running without steam, the rings 4, 4 are compressed and form a gap 8 above the upper surface of the rim of the piston, through which air trapped in the cylinder can pass from one side of the piston to the other without resisting it by reciprocating movement. the cylinder of steam penetrates through the channels 1 into the annular recess 2 and presses the ring 4 against the walls of the cylinder. At the same time, the steam penetrates through the channels 3 into the annular recesses 5, reducing the pressure of the rings on the walls of the cylinder and facilitating their advancement along the cylinder.

The subject matter of the invention.

Packing rings for pistons and spools of steam and gas machines, characterized in that they are fitted

on the piston or the spool in such a way that during idling they are compressed, forming annular gaps at the cylinder walls, in order to reduce the resistance at the specified course of the machine.

Fp c. 2 ,, 3 S 3 Д-.х. fig / - 2 figl GG..l d - h /