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Turbo compressor and turbo refrigerator comprising same

A technology of turbo compressors and refrigerants, applied in refrigerators, compressors, irreversible cycle compressors, etc., can solve the problems of complex bearing structure, mechanical loss, etc., achieve miniaturization, suppress rotation deflection, and shorten shaft effect on length

Active Publication Date: 2020-11-13
MITSUBISHI HEAVY IND THERMAL SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, the structure of the bearing may become complicated due to the installation of the lubricating oil system, or mechanical loss may be caused by the friction of the bearing.

Method used

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  • Turbo compressor and turbo refrigerator comprising same
  • Turbo compressor and turbo refrigerator comprising same
  • Turbo compressor and turbo refrigerator comprising same

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Embodiment Construction

[0032] Hereinafter, a turbo compressor according to an embodiment of the present invention will be described.

[0033] Such as figure 1 As shown, the turbo compressor 1 is one of the machines constituting the refrigerant circuit 3 of the turbo refrigerator. The refrigerant circuit 3 includes: a turbo compressor 1; a condenser 70 for condensing the refrigerant compressed by the turbo compressor 1; an expansion valve 74 for expanding the refrigerant condensed by the condenser 70; and an evaporator 76 for making the refrigerant compressed by the expansion valve 74 The expanded refrigerant evaporates. The turbo compressor 1 converts the low-pressure gas refrigerant evaporated in the evaporator 76 into a high-temperature and high-pressure gas refrigerant.

[0034] Such as figure 2 As shown, the turbo compressor 1 is configured to include a casing 10 forming its outer casing, a compression section 12 having a plurality of impellers 12A, an electric motor 14, a shaft 15, radial ...

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Abstract

Provided are a turbo compressor and a turbo refrigerator comprising the same with which the length of a shaft in an axial direction can be shortened, rotational shake accompanying rotation of the shaft is suppressed, and a device can be made small. The turbo compressor comprises a compressor part which compresses refrigerant; a shaft (15) which drives the compressor part around an axis of rotationX; a magnetic bearing (30A) which has provided thereto an iron core part (32) comprising a plurality of teeth parts (34) formed at equiangular intervals around the axis of rotation X, and, a plurality of coils (36) respectively wound around the plurality of teeth parts (34), and said magnetic bearing (30A) allows the shaft (15) to pass through and supports said shaft (15) without contacting the same; an auxiliary bearing which allows the shaft (15) to pass through; and a displacement sensor (50) which detects displacement of the shaft (15), wherein the displacement sensor (50) is provided between neighboring coils (36).

Description

technical field [0001] The present invention relates to a turbo compressor and a turbo refrigerator including the turbo compressor. Background technique [0002] In turbo compressors, contact bearings such as rolling bearings are sometimes used to rotatably support a shaft that rotationally drives a compression mechanism. In this case, the installation of the lubricating oil system may complicate the structure of the bearing or cause mechanical loss due to friction of the bearing. [0003] Therefore, for the purpose of omitting a lubricating oil system or reducing mechanical loss, magnetic bearings, which are non-contact bearings, are sometimes used instead of rolling bearings. [0004] As a structure of a fluid machine using a magnetic bearing, for example, as disclosed in Patent Document 1 image 3 in the structure. According to this configuration, the auxiliary bearing and the displacement sensor are provided on both sides of the magnetic bearing along the axial directi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/058F04D29/059
CPCF04D29/058F04D29/059F25B1/053F25B49/022F04D17/122F04D29/5806F04D25/06F25B9/06
Inventor 长谷川泰士上田宪治大村真太郎
Owner MITSUBISHI HEAVY IND THERMAL SYST
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