SU1620689A1 - Stator of centrifugal compressor - Google Patents

Abstract

The invention relates to a compressor. The goal is to increase the efficiency of the compressor. The stator includes a housing 1, a diaphragm 2 installed therein, forming a diffuser 3 with blades 4 having double curvature, a turning section 5 and a return guide 6 with flat radial plates 7. The inflection point of the curvature of the center line of each blade 4 is located on diameter d, constituting a certain amount from the diameter di of the arrangement of the input edges of the 8 vanes. The thickness of the blades at the output is also a certain amount of the thickness of the blades on the average diameter d, and the radial length (the thickness of the plates 7 is 0.05-o I .. (dt-dt) 0.1 of the radial extent -L -2-z-Si blades. The choice of specific dimensions and profiling of the blades provides axial flow out of the diffuser blades and reduction of turbulent flow pulsations at the exit of the plates, which contributes to increasing the efficiency of the compressor 3 or 5 (L

Description

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The invention relates to the field of compressor engineering and can be used in the stators of centrifugal compressors.

The purpose of the invention is to increase the efficiency of the compressor.

FIG. 1 shows a longitudinal section of the stator; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. one.

The centrifugal compressor stator includes a housing 1, a diaphragm 2 installed therein with forming a diffuser section 3 with blades 4 installed in it, a rotary section 5 and a return guide 6 and flat radial plates 7. The vanes 4 of the diffuser section 3 are made with double curvature, the inflection point of the midline a – o of each of which is located on a diameter of 1.09 - 1.28 dia di of the location of their input edges 8, the ratio of the thickness L 3 at the exit of the blades 4 to the thickness of & 2 on the average diameter c / 0 3 .. 2.0, the radial plates 7 are installed in the return guide 6, and their

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radial extent is 0.05 ... 0.1 times the radial extent

3 g-blades 4 diffuser section 3.

The stator operates as follows.

When rotating the impeller of the compressor, the flow enters the diffuser part /

current 3 with blades 4, the double curvature of which with minimal hydraulic losses provides the axial direction of the flow velocity at the exit from the diffuser. Then the flow smoothly rotates in the rotary section 5 and enters the return guide vane 6 with flat radial plates 7, where the turbulization of the flow associated with its rotation decreases. Thus, the guide is reduced.

Equal losses in the stator of the compressor, which contributes to increasing its efficiency.

Claims (1)

Invention Formula A centrifugal compressor stator, comprising a casing, a diaphragm installed therein with a downward section and a return guide device, and a radial plate, characterized in that, in order to increase the compressor efficiency, the diffuser vanes are made with a double curvature, the inflection point of the middle line of each of which is located on a diameter of 1.09 ... 1.28 diameters of the location of their input edges, the ratio of the thickness of the blades at the output and the average di meter of diffuser 0,3 ... 2, the radial plates are mounted in reverse the guide apparatus, and their radial extent is 0.05 ... 0.1 times the radial extent of the diffuser vanes. 5-5  Eri L