Dynamic pressure bearing, high-speed fluid power machinery and high-speed centrifugal compressor

A dynamic pressure bearing and bearing technology, applied in the field of dynamic pressure bearings, can solve the problems of small bearing capacity, easy deformation, unstable operation, etc., and achieve the effects of improving rigidity and stability, reducing vibration and reducing operating noise.

Inactive Publication Date: 2013-10-23
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to ensure the high-speed rotation and stability of the compressor, sliding bearings are used to support the rotating main shaft. The dynamic pressure sliding bearing is a commonly used bearing structure. However, due to the l

Method used

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  • Dynamic pressure bearing, high-speed fluid power machinery and high-speed centrifugal compressor
  • Dynamic pressure bearing, high-speed fluid power machinery and high-speed centrifugal compressor
  • Dynamic pressure bearing, high-speed fluid power machinery and high-speed centrifugal compressor

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Embodiment Construction

[0041] Attached below Figure 1-5 The present invention is described:

[0042]Although the dynamic pressure bearing proposed in this application can also be applied to ordinary high-speed fluid power machinery, it is especially suitable for heavy-duty high-speed fluid power machinery, because it can not only bear heavy loads, but also ensure that the rotor runs at high speed under heavy loads. It maintains relatively high efficiency and operation safety and stability, and at the same time greatly prolongs the service life of the bearing and improves economic benefits. Take the high-speed centrifugal compressor as an example below to describe the present invention in detail:

[0043] Such as figure 1 As shown, the motor rotor of this high-speed centrifugal compressor is a cantilever structure, and the impeller 2 adopts two stages, which are directly installed on the cantilever end of the motor rotor in a direct connection, and are set in the same direction; the motor is a DC ...

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Abstract

The invention discloses a centrifugal compressor. A rotating shaft of a motor stretches into a closed cavity of the compressor from a box body to be directly connected with an impeller, and a rotating shaft of the compressor is located in a shell through dual radial bearings. The dual radial bearings enable the rotating shaft to have the advantages of large rigidity, high carrying capacity, less deformation after carrying, stability in operation and the like. The dual radial bearings also adopt three special oil wedge slots to support the rotating shaft, so that the rotating shaft can operate stably in a high-speed rotating process.

Description

technical field [0001] The invention relates to a dynamic pressure bearing used in high-speed fluid dynamic machinery, especially a dynamic pressure bearing used in a centrifugal compressor directly driven by a motor, and also relates to a high-speed fluid dynamic bearing with the dynamic pressure bearing. Mechanical and high speed centrifugal compressors. Background technique [0002] At present, centrifugal compressors in the field of air conditioning use fixed-frequency AC motors or variable-frequency AC motors to increase the speed to the design speed through the speed-increasing gear, and drive the impeller to rotate to do work on the incoming gas, thereby increasing the gas pressure. In order to ensure the high-speed rotation and stability of the compressor, sliding bearings are used to support the rotating main shaft. The dynamic pressure sliding bearing is a commonly used bearing structure. However, due to the limitation of the overall size of the compressor, the exi...

Claims

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Application Information

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IPC IPC(8): F16C17/00F16C33/12F16C33/10F04D29/046
Inventor 蒋楠刘华张治平钟瑞兴蒋彩云谢蓉傅鹏闫秀兵
Owner GREE ELECTRIC APPLIANCES INC
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