A compressor crankshaft counterweight automatic adjusting device, a refrigeration device and a damping method

By installing an automatically adjusting counterweight device on the compressor crankshaft and using an electromagnet and power supply unit to adjust the position of the counterweight, the vibration problem of the variable frequency compressor at different speeds and resonant frequencies is solved, achieving a balance between rotational inertial force and reciprocating inertial force and reducing vibration.

CN117627895BActive Publication Date: 2026-06-09QINGDAO WANBAO COMPRESSOR
View PDF 2 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
QINGDAO WANBAO COMPRESSOR
Filing Date
2023-10-23
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

The existing crankshaft counterweight method for compressors cannot effectively balance the rotational inertial force and reciprocating inertial force of variable frequency compressors at different speeds, and cannot reduce vibration when the speed frequency and resonant mode frequency coincide.

Method used

An automatic counterweight adjustment device for the compressor crankshaft is adopted. The counterweight is controlled by an electromagnet and a power supply unit to move under the action of centrifugal force. When the rotational speed frequency and the resonant mode frequency coincide, the position of the counterweight is adjusted by electromagnetic force to balance the rotational inertial force and the reciprocating inertial force.

Benefits of technology

It achieves adaptive adjustment of the counterweight position at different speeds, balances rotational inertia and reciprocating inertia, reduces compressor vibration in different directions, and improves the user experience of refrigeration equipment.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN117627895B_ABST
    Figure CN117627895B_ABST
Patent Text Reader

Abstract

This invention provides an automatic crankshaft counterweight adjustment device for compressors, a refrigeration device, and a vibration reduction method, relating to the field of compressor noise reduction technology. The automatic crankshaft counterweight adjustment device, refrigeration device, and vibration reduction method of this invention allow the counterweight to move relative to the crankshaft under centrifugal force as the compressor operates at different speeds. This moves the counterweight closer to or further away from the crankshaft's rotational center, balancing the rotational and reciprocating inertial forces at different speeds, thus achieving adaptive adjustment of the counterweight. Simultaneously, when the compressor's rotational speed frequency coincides with the resonant mode frequencies in different directions, the power supply unit changes the current output to the electromagnet's coil. The electromagnet then uses magnetic force to push the counterweight closer to or further away from the crankshaft's rotational center, balancing the unbalanced forces such as reciprocating and rotational inertial forces in different directions, reducing the excitation force transmitted by the compressor mechanism in different directions, and thereby reducing vibration in different directions.
Need to check novelty before this filing date? Find Prior Art