Compressor Counterweight Cover for Oil Flow Control
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Solution Overview
Problem
Compressors in cooling, refrigeration, and heat-pump systems experience reduced efficiency due to excessive oil circulation caused by rotating counterweights, which leads to undesirable windage and oil circulation, affecting heat transfer and overall system performance.
Innovation Solution
The implementation of a counterweight cover that shields the counterweights from oil splashing and circulation, reducing viscous drag and oil circulation by restricting oil flow, and incorporating an upper counterweight cover with anti-rotation features and a suction baffle to direct suction gas effectively, thereby minimizing interaction between the counterweights and oil.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If counterweights are added to the drive shaft to reduce vibration, then the vibration and operational reliability are improved, but oil circulation and windage increase due to counterweight rotation
Solution Approach 1:
The patent extracts the harmful interaction between counterweights and oil by introducing a counterweight cover that isolates the rotating counterweights from the oil environment. The cover creates a physical barrier that prevents oil from contacting the counterweights during rotation, thereby eliminating the harmful windage and circulation effects while preserving the counterweight's vibration-reduction function.
Solution Approach 2:
The counterweight cover acts as an intermediary element between the rotating counterweights and the oil. This intermediate component allows the counterweights to rotate freely for vibration balancing while preventing direct interaction with oil, thus mediating between the beneficial rotational motion and the harmful oil contact.
2Stability of the object's composition
If counterweights rotate to balance the drive shaft, then vibration is reduced, but viscous drag and energy loss increase due to oil circulation
Solution Approach 1:
The counterweight cover extracts the harmful viscous drag interaction by creating a physical separation between the rotating counterweights and the oil. This isolation allows the counterweights to rotate without generating significant windage or circulating oil, thereby eliminating the energy loss while maintaining the drive shaft's rotational balance.
3Object-generated harmful factors
If the counterweight cover restricts oil flow to reduce circulation, then oil circulation and windage are reduced, but the structure becomes more complex
Solution Approach 1:
The counterweight cover is implemented as a simple shell-like structure that encloses the counterweights. This thin-walled enclosure effectively restricts oil flow and prevents circulation without adding significant structural complexity to the compressor. The cover can be integrated with existing components like the housing or bearing assembly.
Solution Approach 2:
The counterweight cover serves multiple functions simultaneously: it isolates counterweights from oil, reduces windage, maintains structural integrity, and can serve as a mounting surface for other components. This multi-functionality justifies the added structural element by delivering multiple benefits from a single component.
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
This solution enhances the operational efficiency of compressors by reducing oil circulation and windage, improving heat transfer, and maintaining consistent system performance by minimizing the impact of counterweight rotation on oil distribution.
Implementation Method 1
rotation of the counterweight may cause undesirable windage and/or oil circulation due to rotation within a shell of the compressor. Excessive oil circulation reduces the overall efficiency of the cooling, refrigeration, or heat-pump system, as oil within each system prevents optimal heat transfer within the condenser unit and evaporator unit of each system.
Implementation Method 2
incorporating an upper counterweight cover with anti-rotation features and a suction baffle to direct suction gas effectively, thereby minimizing interaction between the counterweights and oil.
Implementation Method 3
a drive shaft may be used to impart a force on and drive the compression mechanism. In order to reduce vibration of the compressor, such a drive shaft may include one or more counterweights that are sized and positioned relative to the drive shaft to rotationally balance the drive shaft.
Implementation Method 4
The implementation of a counterweight cover that shields the counterweights from oil splashing and circulation, reducing viscous drag and oil circulation by restricting oil flow
Data Source
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AI summary
A counterweight cover for a compressor is provided and may include an annular body having a recess at least partially defined by an outer circumferential portion, an inner circumferential portion, and an upper portion connecting the outer circumferential portion and the inner circumferential portion. A suction baffle may be disposed on the annular body and may direct a flow of suction gas within the compressor.