CENTRIFUGAL COMPRESSOR

摘要

The invention relates to the field of compressor, and can be used in centrifugal compressors with an electric motor in which the rotor is mounted on magnetic bearings as well as the end seals used dry gas dynamic seals.; The technical result in the achievement of which the claimed utility model consists in selecting parameters of elements of the hydraulic system and the locations of magnetic bearings that provide the desired degree of compression of the natural gas passing through the compressor, and to achieve a predetermined performance of his work with a corresponding permissible value of vibration of the rotor condition.; To achieve said technical result, the centrifugal compressor preferably two-stage, containing equipped end plate with a central hole one-piece housing within which are situated forming a flow part elements in the form of a stator, comprising a diaphragm suction, reverse guiding unit with blades bezlopatochnye diffusers placed between the diaphragms, and a rotor with a shaft and two having vane impellers of the first and second stages mounted on a magnetic hem pnikah, namely on the two support and one thrust, wherein the first support bearing is located by driving the compressor and used as the end seals, dry gas dynamic sealing relation elements flowing part and aspect ratio defining the installation location reference magnetic bearing related dependencies in which:; d ₁ / D ₂ is selected in the range of from 0.33 to 0.36,; d ₂ / D ₂ is selected in the range of from 0.37 to 0.40,; δ / D ₂ is selected in the range of from 0.01 to 0.013,; D ₄ / d ₂ = D ₅ / D ₂ is selected in the range of from 1.7 to 1.8,; I ₁ / I is selected in the range of from 0.4 to 0.5,; I ₂ / I is selected in the range of from 0.3 to 0.5,; wherein: d ₁ - shaft diameter at the entrance to the impeller of the first stage;; d ₂ - the diameter of the shaft at the entrance to the impeller of the second stage;; δ - thickness of the blades of impellers of the first and second stages;; D ₂ - bezlopatochnogo diameter of the diffuser inlet;; D ₄ - bezlopatochnogo diameter of the diffuser outlet;; ₅ D - diameter of the inlet guide vanes in the return blade;; I - the distance between the axes of the reference magnetic bearings;; I ₁ - distance from the reference axis of the first magnetic bearing, disposed on the drive side of the compressor to the axis of the first stage impeller;; I ₂ - distance from the reference axis of the second magnetic bearing to the rotor axis of the second stage.; 1 bp f-ly