Rotary Compressor Vane Guide and Auxiliary Bearing
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Solution Overview
Problem
Existing rotary compressors with rotating vanes face challenges in accurately orienting the vanes at high speeds, leading to potential fluid leaks and reduced structural stability due to complex guide mechanisms and lack of consideration for vane strength and rigidity.
Innovation Solution
A simplified guide structure using slots and grooves for vane orientation, combined with an auxiliary bearing that supports rotational motion, reduces wear and enhances structural stability by minimizing relative speed between the vanes and stationary components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a complex guide mechanism (vane guide and vane bush) is used to accurately position the vane, then the positioning accuracy is improved, but the device complexity and production cost increase
Solution Approach 1:
The patent extracts and eliminates the complex guide mechanism (vane guide and vane bush) from the compressor structure. Instead of using separate guide components, the invention integrates the guiding function into the rotor slots and cylinder bore, thereby reducing the number of parts while maintaining accurate vane positioning throughout the compression cycle.
Solution Approach 2:
The rotor slots and cylinder bore are designed to serve multiple functions: they provide structural support, guide vane movement, and maintain positioning accuracy simultaneously. The rotor slots guide the vane during rotation while the cylinder bore provides the compression chamber and guides the vane tip, eliminating the need for dedicated guide components.
2Productivity
If the vane rotates at high speed with the rotor, then the compression efficiency is improved, but the structural stability and reliability of the vane decrease due to centrifugal force and wear
Solution Approach 1:
The patent incorporates a bearing directly into the vane structure at its rotating end, before wear or failure can occur. This preliminary protective measure ensures that the vane maintains structural stability and reliable positioning even during high-speed rotation, preventing centrifugal force from causing misalignment or failure.
Solution Approach 2:
The bearing acts as an intermediary element between the vane and the rotor slots/cylinder bore. It mediates the high-speed rotational motion, reducing direct friction and wear between the vane and guiding surfaces, thereby maintaining vane reliability and positioning accuracy during high-speed operation.
3Strength
If the vane is designed with high strength and rigidity structure, then the structural stability is improved, but the ease of manufacture and assembly decrease
Solution Approach 1:
The patent merges the vane and bearing into a single integrated component. The bearing is formed as an integral part of the vane structure, eliminating the need for separate manufacturing and assembly steps. This integration maintains the necessary strength and rigidity for high-speed operation while simplifying the manufacturing process and reducing assembly complexity.
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 proposed solution achieves accurate vane orientation and enhanced structural stability, reducing fluid leaks and wear, while maintaining a simple structure that does not increase the number of components, thus improving the reliability and productivity of the compressor.
Implementation Method 1
reduces wear and enhances structural stability by minimizing relative speed between the vanes and stationary components
Data Source
AI summary
A rotary compressor is provided that may include a cylinder; a chamber eccentrically formed in the cylinder and accommodating a predetermined working fluid; a rotor rotatably received in the chamber and arranged so as to be concentric to the cylinder; first and second bearings disposed on upper and lower portions, respectively, of the cylinder so as to close the chamber, and which support a drive shaft of the rotor; a plurality of vanes movably installed on the rotor in a radial direction thereof, and protruding from the rotor up to an inner circumferential surface of the cylinder so as to divide the chamber into a plurality of compression spaces; first and second guide grooves which, in order to accommodate a portion of the vanes, are formed on respective surfaces, facing the chamber, of the first and second bearings so as to be concentric to the chamber, and guide the plurality of vanes while the rotor is rotating so that the plurality of vanes continuously protrude up to the inner circumferential surface of the cylinder; and an auxiliary bearing which is provided in at least one of the first guide groove or the second guide groove and rotating with the plurality of vanes.