SU35854A1 - Steam distribution mechanism for direct action machines - Google Patents

Description

The invention relates to steam distribution mechanisms for direct action machines (water or air pumps, etc.), with the main spool override, which the steam is admitted to by the working piston opening the steam lines at the end of its stroke. In the proposed mechanism, in order to distribute steam under the auxiliary spool on the working surface of the main spool, there are cavities: one for inlet of fresh steam into the left side of the auxiliary spool, another for letting in fresh steam to its right side and a third transverse well for alternate release a pair of left and right side spool.

In the schematic drawing of FIG. 1 shows a longitudinal section of a steam distribution mechanism; FIG. 2- (Longitudinal section of the steam cylinder; Fig. 3 - mirror of the main spool; Fig. 4 - view of the main spool from below; Fig. 5 - its side view, and Fig. 6 - its top view.

The steam distribution mechanism is placed in the top cover (Fig. 1), mounted on the steam cylinder of the pump. The cover consists of a body /, a sleeve 4 pressed into it, a main steam distribution valve 3 and

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auxiliary spool 2. The chamber 7 in which the spools are placed is closed on both sides by covers 6. In the body of the housing and bushings there are a JO channel communicating with the atmosphere, a channel 77 communicating with the upper part of the steam cylinder, 72 communicating with the lower part of the steam cylinder, channel 75, which is connected to window 24 in the steam cylinder (Fig. 2), channel 74, which is connected to window 25 in the lower part of the steam cylinder, channel / 5, which is connected to chamber cavity 7 to the left of spool 2, and channel J6. communicating with the cavity of chamber 7 to the right of spool 2. Channels 70, / 7 and 72 exit into the mirror of the spool each with two windows.

Fresh steam from the boiler through channel 8 enters chamber 7 between the collar of spool 2 and above spool 5. Suppose that at this moment both spools are in the extreme right position (Fig. 1); the through window 7 (9 in the spool 3 coincides with the channel window / 2 on the mirror and fresh steam from chamber 7 through channel 72 enters the lower part of the steam cylinder under the piston, which therefore rises. The upper part of the steam cylinder communicates with the atmosphere through the channel 77, the recess 19 (Fig. 1 and 4) on

spool 3 and channel JO. The piston moves up and, not a return by 8-9 mm to the top dead center, opens a window 24 with its lower ring (Fig. 2) through which steam from the lower cavity of the cylinder passes through the channel / 5 (during the lid and in the sleeve) and the recess 2 / (Fig. 1 and 4) and, having entered the channel / b on the right side of the spool 2, moves it to the left. Together with the spool 2, the spool 5 also moves to the left. When the spool 2 is moved by half of its stroke under the action of fresh steam, the channel / b (Fig. 1) is closed by the spool 3 and the spool 2 continues its movement to the left cover 6 under the action of steam expansion, located on the right side of spool 2. When the 3 mm spool does not reach the left cover 6, the recess 22 (on the spool) matches the window of channel J6 and the steam working on the right side of spool 2 is released into the atmosphere through the JO channel ( Fig. 1, 3 and 4). It communicates equally with the atmosphere and the cavity to the left of spool 2 through channel 75, recess 20 (on the spool), channel 4 in the body of the lid and window 26 in the lower part of the cylinder, which is in communication with the atmosphere at this position.

In the left position of the spool 2, fresh steam from chamber 7 through the through window / 7 in spool 3 (Fig. 1, 4, 5, 6), which coincides at this moment with channel 7 /, enters the upper part of the steam cylinder, causing the piston to descend. In this case, the lower part of the cylinder communicates with the atmosphere through the channel / 2, the recess / 9 (on the slide) and the channel JO.

The piston moves down. No income of 8-9 kg to the bottom cover, the piston with its upper ring opens a window 25 in the cylinder (Fig. 2) and steam from the upper cavity of the cylinder through this window, through channel M, recess 20 and channel / 5 enters the left side of slide 2, move it to the right; the valve 3 moves along with it, just as when moving to the left. When the spools under the action of fresh steam are moved to half their stroke, they continue their movement under the effect of the expansion of steam located on the left side of spool 2, since the fresh steam inlet is stopped due to the shutdown of channel 75 of spool 3. If the spool 2 does not reach 2 mm until the right cover 6, the recess 22 coincides with the window 75 on the mirror and the working steam on the left side of spool 2 is exhausted to the atmosphere in a feces 10. Equally in communication with the atmosphere and the cavity on the right side of spool 2 through channel J6, angle kill 27, channel J3 and the upper part of the cylinder, which is connected to the atmosphere by channel 77, recess J9 and channel W. Fresh steam again raises the piston and further work takes place in the same order as described above.

The subject matter of the invention.

A steam distribution mechanism for direct action machines (water or air pumps, etc.) with a main spool auxiliary, to which the steam is injected with a working piston opening the steam drive channels at the end of its stroke, characterized in that the distribution of steam under the secondary spool 2 is produced by the main spool 3, provided for this purpose on its working surface with a recess 20 for letting in fresh steam from channel 4 through channel 75 to the left side of spool 2, a recess 27 for letting fresh steam in from channel 75 through channel 76 to its right side and transverse recesses — for alternately connecting channels 75 and 76 s; channel W for releasing steam. to the author's testimony of E. A. Gerasim on JSS 35854

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