Vane Rotary Compressor Hinge Oil Film Design
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Solution Overview
Problem
Conventional vane rotary compressors experience strike noise and reduced suction flow rates due to hinge friction and inner leakage, caused by the vane's tip striking the cylinder's inner surface during rotation, leading to inefficient compression and refrigerant flow.
Innovation Solution
The design includes a rotor with slots and vanes where the hinge portion is received within a hinge receiving portion on the rotor's outer surface, forming oil films on both sides of the friction point to reduce hinge friction and prevent delayed rotation, thereby enhancing compressor performance and reducing inner leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the vane tip is allowed to contact the cylinder inner surface during rotation, then compression efficiency is improved, but strike noise is generated and suction flow rate is reduced
Solution Approach 1:
The vane is designed with dynamic rotation capability around the rotor periphery, allowing the vane tip to maintain optimal contact with the cylinder inner surface during compression while the hinge portion rotates to prevent strike noise. This dynamic adjustment resolves the contradiction between maintaining compression efficiency and eliminating harmful strike noise.
Solution Approach 2:
The vane is divided into distinct functional segments: the hinge portion for rotation, the blade portion for compression, and the tip portion for contacting the cylinder. This segmentation allows each part to perform its specific function optimally without interfering with others, resolving the contradiction between compression efficiency and noise reduction.
2Ease of operation
If the hinge portion is hinge-coupled to the rotor outer surface, then vane rotation is enabled, but hinge friction increases causing delayed rotation and inner leakage
Solution Approach 1:
A hinge receiving portion is introduced as an intermediary structure between the hinge portion and the rotor outer surface. This intermediary component reduces direct friction by providing a dedicated interface that facilitates smoother rotation and reduces energy loss, while still enabling the necessary hinge coupling for vane rotation.
Solution Approach 2:
The hinge receiving portion modifies the geometric and surface parameters of the hinge interface, optimizing the contact characteristics to reduce friction. By changing the parameters of the hinge coupling interface, the system achieves easier rotation with reduced energy loss while maintaining operational capability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively minimizes strike noise and improves compressor performance by reducing hinge friction and inner leakage, ensuring smooth operation and efficient refrigerant compression.
Implementation Method 1
forming oil films on both sides of the friction point to reduce hinge friction
Data Source
AI summary
Disclosed herein is a vane rotary compressor in which a fluid such as a refrigerant is compressed while a volume of a compression chamber is reduced during rotation of a rotor. There is provided a vane rotary compressor capable of preventing a delay of rotation operation of a vane by respectively forming oil films on both sides of a hinge portion of the vane in a rotation direction thereof and smoothly sliding the hinge portion.