Method for eliminating friction pair of refrigerator inverter compressor by adopting magnetic bearing

A technology of magnetic levitation bearing and variable frequency compressor, which is applied to liquid variable-capacity machinery, mechanical equipment, variable-capacity pump components, etc. The effect of reliability and service life

Inactive Publication Date: 2016-02-24
CHANGHONG HUAYI COMPRESSOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The friction pair between the thrust surface of the crankshaft and the thrust surface of the crankcase has traditionally been improved by improving lubrication, replacing sliding friction with rolling fri

Method used

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  • Method for eliminating friction pair of refrigerator inverter compressor by adopting magnetic bearing
  • Method for eliminating friction pair of refrigerator inverter compressor by adopting magnetic bearing
  • Method for eliminating friction pair of refrigerator inverter compressor by adopting magnetic bearing

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Example Embodiment

[0029] A method for using magnetic suspension bearings to eliminate friction pairs of refrigerator inverter compressors is characterized by including the following steps:

[0030] Step 1: The distance between the lower surface of the permanent magnet rotor and the lower surface of the stator iron core is one, which is greater than the distance two between the upper surface of the permanent magnet rotor and the upper surface of the stator iron core;

[0031] Step 2: The centerline of the permanent magnet rotor is below the centerline of the stator core, generating magnetic eccentricity in a specific direction;

[0032] Step 3: Under the above-mentioned specific magnetic eccentricity, a magnetic pulling force F that is opposite to the direction of gravity, that is, upward, is generated on the permanent magnet rotor;

[0033] Step 4: Under the action of the upward magnetic pulling force F on the permanent magnet rotor, lift the crankshaft so that the thrust surface of the crankshaft leave...

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PUM

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Abstract

The invention relates to a method for eliminating friction pair of a refrigerator inverter compressor by adopting a magnetic bearing. The method comprises the following steps: step one, enabling the distance I between the lower surface of a permanent magnet rotor and the lower surface of a stator core to be greater than the distance II between the upper surface of the permanent magnet rotor and the upper surface of the stator core; step two, enabling the center line of the permanent magnet rotor to be below the center line of the stator core to produce magnetic eccentricity in a specific direction; step three, generating an upward magnetic pull force F opposite to the gravity direction on the permanent magnet rotor under the action of the specific magnetic eccentricity; disappearing a friction pair between a crankshaft thrust surface and a crankcase thrust surface and between the upper surface of an inner hole of the permanent magnet rotor and the lower surface of a crankcase axle hole, so that the friction pair at the position disappears and cannot generate friction heat any more, and heating of the compressor is reduced. The method can greatly improve the reliability and the service life of the inverter compressor, thus having broad market space.

Description

technical field [0001] The invention relates to the field of refrigeration compressors for refrigerators, in particular to a method for eliminating friction pairs of frequency conversion compressors for refrigerators by using magnetic suspension bearings. Background technique [0002] For refrigerator inverter compressors, the general variable speed range is 1200-4500 rpm. The higher the speed, the greater the load, the greater the friction work, and the greater the noise. The smaller the friction work, the better the mechanical efficiency of the compressor, and reducing the friction pairs is more beneficial to reducing noise. At present, there are 5 mechanical friction pairs in the frequency conversion compressor of the refrigerator, the thrust surface of the crankshaft and the thrust surface of the crankcase, the outer circle of the long axis of the crankshaft and the shaft hole of the crankcase, the large hole of the connecting rod and the outer circle of the crank throw ...

Claims

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Application Information

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IPC IPC(8): F04B39/00
CPCF04B39/0044
Inventor 盛正堂周晓文尹小兵李勍胡小强张超叶鹏翟竞魁胡健李淮亮
Owner CHANGHONG HUAYI COMPRESSOR CO LTD
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