Opposed Screw Compressor Non-Interference System
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing screw compressors with roller element bearings result in large and costly fluid machines for HVAC&R applications, and there is a need for a more cost-effective and precisely aligned fluid machine that minimizes friction.
Innovation Solution
A fluid machine design featuring a casing with independently supported first and second rotors, where spacers are used to maintain axial clearances and prevent rotor interference, allowing for precise positioning and reduced friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If roller element bearings are used to precisely position rotors and minimize friction, then rotor positioning precision and friction reduction are improved, but device size and cost increase
Solution Approach 1:
The patent removes the transmission mechanism (gears, belts, or chains) from the system, allowing both rotors to be independently supported by simple bearings directly in the casing. This extraction of the transmission component eliminates the need for complex synchronized positioning while maintaining rotor positioning precision through direct bearing support.
Solution Approach 2:
The patent divides the rotor support system into independent segments, with each rotor having its own independent bearing support. This segmentation allows each rotor to be positioned and supported independently without requiring a complex interconnected transmission system, reducing overall device complexity while maintaining positioning precision.
2Loss of energy
If roller element bearings are used to minimize friction during high speed operation, then friction reduction is improved, but device size and cost increase
Solution Approach 1:
By removing the transmission mechanism that would require additional bearings and support structures, the patent reduces the number of friction points in the system. The independently supported rotors eliminate the need for transmission gears or belts, thereby reducing overall friction and energy loss while simplifying the device.
3Stability of the object's composition
If transmission gears are used to synchronize rotor movement, then rotor synchronization is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts and removes the transmission synchronization mechanism (gears, belts, or chains) entirely. Instead, it achieves rotor synchronization through a different approach: both rotors are driven directly by the same power source (motor or engine) through independent but synchronized mounting on the same drive shaft or through independent motors controlled to run in sync, eliminating the need for mechanical transmission components.
Solution Approach 2:
The patent replaces the mechanical transmission synchronization system with either direct mechanical coupling to a common power source or independent motor control systems. This substitution eliminates complex mechanical gears while maintaining synchronization through simpler means—either through shared rotational drive or through electronically controlled independent motors.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A fluid machine includes a first rotor rotatable about a first axis. The first rotor has a first portion and a second portion. A second rotor is rotatable about a second axis. The second rotor includes a first portion and a second portion. At least one spacer is associated with the first rotor and the second rotor to limit intermeshing engagement between the first rotor and the second rotor.