Multi-Stage Compressor Vane Linkage for Roller Contact Stability
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Solution Overview
Problem
Conventional two-stage rotary rotor compressors experience insufficient contact stress between the high-pressure-stage vane and the roller during startup and operation under small pressure differences, leading to potential detachment and abnormal noise, as well as damage to the roller and vane.
Innovation Solution
A multi-stage compressor design featuring a linkage structure between the first-stage and second-stage cylinders, where the second vane moves in correlation with the first vane, ensuring continuous contact with the roller through a connecting rod, sliding grooves, and pin shafts, maintaining contact and reducing noise and damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a two-stage compressor is used to reduce pressure difference and improve compression efficiency, then the contact stress between the high-pressure-stage vane and roller becomes insufficient under small pressure difference conditions, leading to vane detachment and abnormal noise
Solution Approach 1:
A linkage structure is introduced as an intermediary mechanism between the first-stage and second-stage vanes. This linkage structure includes a connecting rod with first and second sliding grooves, and corresponding pin shafts that connect to the vanes. The linkage structure transmits the movement of the first-stage vane to the second-stage vane, ensuring the second vane maintains proper contact with the roller even when pressure difference is small, thereby preventing vane detachment and abnormal noise while preserving the compression efficiency benefits of two-stage compression
2Device complexity
If the second-stage vane operates independently without linkage to the first-stage vane, then the device complexity is reduced, but the vane may strike the roller causing abnormal noise and damage during startup and operation
Solution Approach 1:
The linkage structure performs preliminary action by pre-positioning and guiding the second-stage vane through the movement transmission from the first-stage vane. During startup and operation, the linkage structure ensures the second vane is already in the correct position and movement trajectory before it could potentially strike the roller, preventing abnormal noise and damage. The sliding grooves and pin shafts provide smooth guidance that eliminates sudden impacts
Data Source
AI summary
The present disclosure provides a multi-stage compressor and an air conditioner having the same. The multi-stage compressor includes: a first-stage cylinder including a first-stage compression cavity and a first vane disposed in the first-stage compression cavity; a second-stage cylinder including a second-stage compression cavity and a second vane disposed in the second-stage compression cavity, wherein a refrigerant flowing out from the first-stage compression cavity enters the second-stage compression cavity; a linkage structure disposed between the first vane and the second vane, so that the second vane is capable of moving with a movement of the first vane and maintain contact with a roller in the second-stage compression cavity.