SU100318A2 - Steam distribution mechanism for compound pump - Google Patents

Description

In auth. St. L1 98534 describes a steam distribution mechanism for a compound pump with one multi-disk asymmetric steam distribution valve. A special feature of this steam distribution mechanism is that, in order to exclude in-depth or indefinite sweep of weft pressure on the operation of steam distribution, the cavity between spool disks of different diameters at all positions of the spool is constantly in communication with the atmosphere.

In the process of experimental studies, it was found that in the steam distribution mechanism it is not sufficiently reliable to move the spool to the extreme position in the direction of small diameter discs. The present invention is directed to eliminating this disadvantage of the steam distribution mechanism according to ed. St. No. 98534.

The invention consists in the fact that the chamber of a large-diameter spool disc is connected to the high-pressure cylinder by an additional channel, which are blocked by the high-pressure piston of the cylinder

dav.1eni with the lowest bottom piston.

FIG. Figure 1 shows a schematic vertical section of a pump CKiiii, of a gold pump, whose steam distribution. The mechanism of the mechanism is in the extreme right position; in fig. 2 - the same as the priest; the zolopik in the extreme position.

A cavity is formed in the housing of the pump, in which the multidisk hollow valve 2 moves with disks 2, 3, 4, 5, 6, and 7. The fresh steam is transferred to the valve through channel 8. In the walls of the housing / there is a channel 9, at one end, withdrawal into channel 14 connected to the low pressure cylinder and the other to the spool cavity at some distance from the chamber W of the large-diameter zolotnkoy disk. The channel 11 is at one end brought into the cavity of the zonal intercept at some distance from the chamber 12 of the spool disc of small diameter. Channel 13 departs from Qi, a thyidra of high Io, and channel 15 leaves the cylinder of the LOW pressure of the channel 14. In addition, channel 15 leaves the high pressure cylinder, but the steam from the cylinder passes through

channel 16 in the body of the spool into the chamber 10 of the spool disc 7 of large diameter. Channel 17 connects the low pressure cylinder to the chamber 10 of the internal disk of a bore diameter.

The post 18 inside the spool forms a channel, co-ing the joint between the; 1, spool-type dnskamn of different diameters with the atmosphere. In the wall of the high-pressure cylinder, channel 19, a co-section of high pressure with a chamber} 0 of the slide disk of bore diameter, passes. The channel 19 is closed by a high-pressure piston 20. Low pressure porn 21 controls channel 17 overlap.

The action of the steam distributor mechanism is as follows.

1 in the position of the gold maker 2 (phi 1 1) in the extreme ira of the position of the fresh pair of channels b. and 8 is supplied under the high pressure cylinder 20 and is displaced. Couples from above the high-pressure cy-tindra space to channel 13 through the annular space between the disks 4 and 5 flow into the channel 14 and it will squeeze into the low pressure cylinder.

The piston 20 opens the channels 19 and n at 13 in the upper position. The channel 19 is blocked by the disk 7 of the technical tool at the indicated position of the zolotoyk. According to kiaa.tu, 13 fresh steam enters the chamber 72 of the spool disc of the maximum diameter and holds the spool in the extreme right position.

In the extreme upper position, the piston 20 of the cylinder of the highest pressure opens the canal. 15 jr. Fresh steam from it through the channel} 16 in the body of the disk 7 enters the chamber 10. Since the pressure between the spool discs of different diameters is constant with the atmosphere fresh steam from the side of chamber 10 acts on a large area of the n spool. moves toward the small disks. As soon as the edge of the spool disc 7 opens the drip 19, the fresh steam through the pic, 1 unit of g enters the cavity 10, I will act on the piston 7. This ensures the reliability of the non-mixing of the spool to the outermost part of the small disks.

In this position of the steam distribution, turn on the mechanism of fresh steam 1sh to channel 8 through the co.1 die recess between the zoloto) n; new discs 4 and 5 will enter the drip 13 and the piston 20 will act on it, moving it downwards The low pressure channels 8, 8 and 14 will go under the piston 21 of the low pressure cylinder. Moving up, porpgen 21 will open channel 17 and connect {it camera 10 with the center of low pressure. The subnormal space of the cylinder) P13 of the pressure at this time is coherent with the atmosphere by channel 14, the cavity between the spool disc, 5 p 6 and the cavity 18.

As only the edge of the piston 20 will open channel 13, fresh steam will flow through it into the chamber number 12 of a small-diameter spool valve. At this time, channel 19 will be blocked by the piston 20. Since chamber 10 will communicate with the low pressure cylinder, the force on the spool in the direction of the spool disks of larger diameter will be greater than in the opposite direction and slide in the direction of the large-diameter spool disk. Cyc; automatic steam distributor 1n repeat.

Before me invented

Steam distribution. A mechanism for compauid-pasas according to aut. St. Nb 98534, in order that, in order to improve the reliability of changes (the spool valve is at the extreme position in the direction of small-diameter disks and by adding additional steam to the large-diameter disk chamber, the camera of the slide valve a large diameter is connected to the high pressure cylinder with an additional channel, covered by the high pressure cylinder piston at the bottom of the piston.

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