Compressor Oil Supply Structure for Bi-Directional Shaft Rotation
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Solution Overview
Problem
Existing lubricating oil supply systems for reciprocating type compressors are not capable of supplying oil regardless of the rotational direction of the rotational shaft, limiting their efficiency in bi-directional operation modes.
Innovation Solution
A lubricating oil supply apparatus with a fixed portion and a rotational portion, where the rotational portion is coupled to the rotational shaft and includes a space portion that circles with respect to the rotational center, allowing oil to be supplied to the lubricating oil supply path regardless of the rotational direction, by using a tooth profile engagement mechanism that maintains constant speed and efficient oil flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a spiral groove structure is used for oil supply, then oil can be supplied efficiently in one rotational direction, but the compressor cannot operate efficiently in reverse rotation
Solution Approach 1:
The patent employs asymmetric tooth profiles on the pump gears where the pressure side has a different profile than the suction side. This asymmetric design allows the gears to effectively pump oil in one direction while preventing reverse rotation by creating mechanical interference, thus enabling unidirectional operation control in a bi-directional compressor system
Solution Approach 2:
The patent implements a dynamic oil supply system where the pump gears are selectively engaged or disengaged based on rotational direction. A control mechanism dynamically activates the oil pump only during forward rotation, allowing the compressor to operate efficiently in both directions while maintaining reliable lubrication when needed
2Adaptability or versatility
If the rotational shaft is designed for bi-directional operation, then operational flexibility is improved, but existing unidirectional oil pump structures cannot supply oil in reverse direction
Solution Approach 1:
The patent designs a universal oil supply system that can handle both forward and reverse rotation scenarios. The system includes a control mechanism that detects rotational direction and activates the appropriate oil pump configuration, ensuring reliable lubrication regardless of rotation direction while maintaining the bi-directional operational flexibility
Solution Approach 2:
The patent introduces a control mechanism as an intermediary between the bi-directional rotational shaft and the unidirectional oil pump. This mediator detects the rotational direction and selectively engages the oil pump only when rotation is in the correct direction, thereby preserving both operational flexibility and lubrication reliability
3Device complexity
If oil supply is restricted to one rotational direction, then pump structure simplicity is maintained, but compressor efficiency in high-speed and low-speed modes cannot be optimized independently
Solution Approach 1:
The patent implements dynamic control of the oil supply system based on operational mode. The control mechanism adjusts oil pump activation and flow rate according to whether the compressor is operating in high-speed or low-speed mode, enabling independent optimization of efficiency for each mode while adding minimal complexity to the pump structure
Solution Approach 2:
The patent varies operational parameters of the oil supply system based on compressor speed mode. In high-speed mode, the system provides higher oil flow rates, while in low-speed mode, it reduces flow rates or activates selective lubrication points, thereby optimizing compressor efficiency across different operating conditions without requiring completely different pump structures
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
Enables efficient lubrication of compressor components regardless of the rotational direction, allowing for optimized efficiency in both high-speed and low-speed operation modes, thereby enhancing the overall performance of the compressor.
Implementation Method 1
This structure may use a rotational force of the rotational shaft 50 and viscosity of oil
Data Source
AI summary
A lubricating oil supply apparatus may include a rotational portion that rotates together with a rotational shaft and a fixed portion that maintains a fixed location thereof and supplies oil through a space that circles with respect to a rotational center of the rotational portion, thereby supplying oil regardless of a rotational direction of the rotational shaft.