SU1286818A1 - Packing unit of suction dredge rotor wheel - Google Patents

Abstract

The invention relates to pump construction and improves the efficiency of washing the seals by reducing the pressure losses of the flushing medium (PS) and controlling the flow rate of the PS. In the central part 9 of the washing chamber (PC) are located the edges of the body part 4, connected to the second body part 3, To the peripheral part 10 of the PC are connected the branch pipes 2 of the PS. In the annular rib 8

Description

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FIG. 3

Holes 11 are formed, distributed around its circumference, so that the PS is evenly supplied to flush the gap seals 5 and 6. Splitting the PC with ribs allows eliminating the circulation-screw movement in it, which reduces the pressure loss when the PS is applied to the seals. Seal1

The invention relates to pump construction and can be used in ground pumps.

The purpose of the invention is to increase the efficiency of washing the seals by reducing the pressure loss of the flushing medium and controlling its flow rate.

Fig L depicts the sealing unit of the impeller impeller pump, a longitudinal section; figure 2 - section aa in figure 1; in fig. 3 - sealing unit of the impeller of the soil pump with conical slit seals and the washing chamber moving in the axial direction, longitudinal section.

The sealing assembly of the impeller I of the soil pump contains an annular washing chamber connected to the nozzles 2 for supplying the washing medium and limited by housing parts 3 and 4, which form with the impeller 1 slit seals 5 and 6, one of which. parts 4 is provided with radial ribs 7 and annular rib 8 that surrounds them peripherally. Ribs 7 and 8 of body part 4 are located in the central part 9 of the washing chamber and are connected to the second body part 3, Branch pipes 2 supplying the washing medium to the peripheral part 10 of the chamber, and 11p holes are made in the annular rib 8

The gap seals 5 and 6 may be tapered. Body parts 3 and 4, bounding the washing chamber, are mounted with axial displacement relative to the impeller (FIG. 3).

The impeller 1 includes a wear-resistant sleeve 12, which forms with slot 3 and 4 slotted seals

Neither 5 and 6 can be made conical, and parts 3 and 4, limiting the CC, are mounted with the possibility of axial movement relative to the impeller 1, which allows changing the gaps of the seals 5 and 6 and adjusting the flow rate of the PS. 1 hp f-ly, 3 ill.

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5 and 6 (Fig, -3). The washing chamber, limited by parts 3 and 4, is moved in the pump cover 3 by means of bolts 14. The connections 2 for supplying the washing medium are connected to flexible pipes 5 and sealed relative to the cover 13 by an epiploon 16 (FIG. 3).

The sealing assembly of the impeller of the centrifugal pump works as follows.

When the flushing medium is supplied through the nozzles 2, it enters the peripheral part 10 of the washing chamber, from where it passes through the holes 11 to the slotted seals 5 and 6. Each nozzle 2 (figure 2) supplies water to two adjacent holes 1. Through the distribution of the holes 1 Along the circumference of the annular rib 8, the medium for washing the slotted seals 5 and 6 is supplied uniformly along the circumference, which increases the efficiency of the washing.

Separation of the washing chamber by the rib 8 with the holes 11 and the radial ribs 7 allows eliminating the circulation-screw movement in the washing chamber, which reduces pressure losses when the flushing medium is supplied to the seals 5 and 6 and increases the washing efficiency.

In a submersible pump with conical slit seals 5 and 6 p), the washer chamber can be moved axially in the pump cover 13 by means of bolts 14 relative to the impeller 1. Due to this, the gaps of the seals 5 and 6 change, allowing the flow rate to be adjusted. flushing medium and increase the efficiency of washing (fig.Z).

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Claims (2)

1. Sealing the impeller assembly, primer pump wheels, containing an annular flushing chamber in communication with the flushing medium supply nozzles and limited by casing parts forming slotted seals with the impeller, with this one of the parts is provided with radial ribs and an annular circumference surrounding them. an edge, characterized in that, in order to increase the efficiency of washing the seals by reducing the pressure losses of the washing medium, the edges of the body part are located in the central five 0 t5 The second part of the flushing chamber is connected to the second body part, the nozzles for supplying the flushing medium are connected to the peripheral part of the chamber, and holes are made in the annular rib. 2. The POP-1 assembly, characterized in that, in order to regulate the flow rate of the flushing medium, the slit seals are made conical, and the body parts restricting the flushing chamber are mounted with the possibility of axial movement relative to the impeller. Phi2.1 eleven FIG. 2