Squeeze film damper with novel outer ring structure

Abstract

The invention relates to a squeeze film damper with a novel outer ring structure. The squeeze film damper comprises a fixed damper outer ring, a fixed elastic support base and a damper inner ring arranged on the inner ring of the damper outer ring, wherein the damper inner ring is connected with the elastic support base through an elastic support, and a rotor is arranged on the inner ring of the damper inner ring; an oil film is filled between the inner ring of the damper outer ring and the outer ring of the damper inner ring; an oil supply hole communicated with the oil film is arranged on the damper outer ring; a plurality of oil film counter bores are evenly distributed on the inner ring of the damper outer ring in the circumferential direction; and lubricating oil entering the oil filmcan immediately fill the oil film counter bores under the action of vortexes existing in the oil film counter bores; the vortex effect in the oil film counter bores can hinder the flow of the lubricating oil, completeness of the oil film is guaranteed, more vibration energy can be absorbed through the vortex effect of the oil film counter bores, oil film damping is improved, oil film rigidity isreduced, and stability of a rotor system is improved.

Description

technical field [0001] The invention relates to the technical field of squeeze oil film dampers, in particular to a squeeze oil film damper with a novel outer ring structure. Background technique [0002] The unbalanced force generated by the gravity of the rotor system, manufacturing and assembly errors and other unbalanced factors of the aero-engine and the rotor passing through the critical speed often cause strong vibration of the rotor system, resulting in a decrease in the working stability of the engine. According to statistics, the aero-engine Structural strength failures related to vibration account for more than 90% of the total failures. In order to reduce the vibration of the rotor system, a squeeze oil film damper is usually used at the rotor support to suppress the vibration of the rotor system. [0003] Squeeze oil film damper has the advantages of simple structure, good vibration reduction effect, effectively reducing rotor vibration, reducing external force...

AI Technical Summary

Problems solved by technology

The above improvements are all achieved through the external damper structure and control structure, which increases the complexity of the damper structure

Due to the compact size of the aero-engine, higher requirements are placed on the structural size design and assembly of the damper, and there will be problems such as high maintenance costs in long-term use

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