SU1559221A1 - Turbine machine shaft seal - Google Patents

Abstract

This invention relates to a compressor industry and a turbine industry. The purpose of the invention is to reduce the overflow between the rotor and the stator in turbomachines. The turbomachine shaft seal contains an annular chamber 1, made in the case 2 of the turbomachine, and an annular row of blades 3 placed on the rotor 4 of the turbomachine and entering with a gap in the chamber 1. In the case 2 there are additional chambers 5, and on the rotor 4 there are additional annular rows of blades 6, entering with a gap in the corresponding annular chambers 5. In one of the walls 7 of each annular chamber 1, holes 8 are made coaxially with the axis 9 of the rotor 4, informing each annular chamber 1 with a subsequent chamber 5 and displaced in each subsequent chamber five with respect to the previous chamber 1 in the direction opposite to the rotation of the rotor 4. Each annular chamber 1, 5 is provided with a radial partition 10 installed in front of the hole 8 and displaced relative to it in the direction of rotation of the rotor 4. The gap between each radial partition 10 and the corresponding annular row blades 3 are smaller than the gap between the bottom 11 of the chamber 1 and the annular row of blades 3. The chambers 1, 5 together with the annular rows of the blades 3, 6 and the radial partitions 10 form a multi-stage vortex pump that pumps the working fluid A discharge pressure from the larger towards the smaller, lower-pressure side in the direction of the larger through holes 8. Thus, provided leakages decrease. 2 Il.

Description

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a row of blades 3 placed on the rotor 4 of the turbomachine and entering with a gap in the chamber 1. In the case 2 additional chambers 5 are made; and on the rotor there are additional annular rows of blades 6 entering the corresponding annular chambers 5 with a gap the walls 7 of each annular chamber 1 are provided with holes 8 coaxially with the rotor axis 9 of the rotor k, communicating each annular chamber 1 with a subsequent chamber 5 and displaced in each subsequent chamber 5 with respect to the previous one; the camera 1 in the direction opposite to the rotation; rotor k. Each annular chamber 1, 5 is provided with a radial partition 10, mounted 9221

in front of the hole 8 and offset relative to it in the direction of rotation of the rotor. The gap between each radial partition 10 and the corresponding annular row of blades 3 is smaller than the gap between the bottom 11 of the chamber 1 and the annular row of blades 3 "Chambers 1 5 together with the annular rows

The 13 blades 3, 6 and the radial partitions 10 form a multi-stage vortex pump that pumps the working body, which flows from the side of the greater pressure to the side of the smaller one, with

15 of the lower pressure side in the larger guard through the openings 8. This thereby ensures a reduction in the overflows. 2 Il.

The invention relates to compressor building and turbine construction.

The purpose of the invention is to reduce crossings between the rotor and the stator in turbomachines.

FIG. 1 shows the turbomachine shaft seal, longitudinal section; in fig. 2 - the same cross section

The turbomachine shaft seal contains an annular chamber 1, made in the case 2 of the turbomachine, and an annular row of blades 3 placed on the rotor 4 of the turbomachine and with additional clearance in the chamber 1. In the case 1, additional annular chambers 5 are made annular rows of blades 6, entering with a gap in the corresponding annular chambers 5 "

In one of the walls 7 of each annular chamber 1, holes 8 are made coaxially with axis 9 of the rotor k of the turbomachine, connecting each annular chamber 1 with the subsequent chamber 5 and displaced in each subsequent chamber 5 relative to the previous chamber 1 in the direction opposite to the rotation of the rotor k of the turbomachine .

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Each annular chamber 1 and 5 is provided with a radial partition 10 mounted in front of the opening 8 and displaced relative to it in the direction of rotation of the rotor k of the turbomachine. (The gap between each radial partition 10 and the corresponding annular row of blades 3 is smaller than the gap between

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the bottom 11 of the chamber 1 and the annular row of blades 3.

When the rotor k rotates the turbomachine, each annular chamber t and 5 with a corresponding annular row of blades 3 and 6 and radial partitions 10 forms a vortex pump, pumping the working fluid through the openings 8 from the lower side towards greater pressure than reducing the flow of working fluid between the rotor 4 and the hull 2 turbomachine. The presence of several annular chambers 1 and 5 with corresponding annular rows of blades 3 and 6 makes it possible to prevent leakages with significant pressure differences.

Claims (1)

Formula invented shadows A turbomachine shaft seal, comprising an annular chamber made in the turbomachine body and an annular row of blades located on the turbomachine rotor and entering with a chamber clearance, characterized in that, to reduce the leakage, additional annular chambers are made in the body The Turbo-rotor's rotor contains additional annular rows of blades that enter into the corresponding chambers with a gap, and in one of the walls of each annular chamber there are holes coaxially with the rotor axis, informing each annular chamber with moving and displaced in each subsequent chamber relative to the previous one in the direction opposite to the rotation of the rotor of the turbomachine, each annular chamber is provided with a radial partition installed in front of the orifice and displaced relative to it in the direction of rotation of the rotor and the corresponding annular row of blades is smaller than the gap between the bottom of the chamber and the annular row of blades. Faye. 2