Vertical Motor Thrust Bearing Cooling via Oil Deflector
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Solution Overview
Problem
Conventional vertical motors with water cooling systems for spherical thrust bearings face issues such as unavailability of suitable water sources, contamination leading to premature failures, and leakage contaminating the oil sump, necessitating an improved cooling method.
Innovation Solution
Incorporating an oil deflector in the oil sump to guide heated lubricating oil from the thrust bearing into a narrow gap between the deflector and the sump wall, where it can cool down before being re-circulated, potentially aided by fins and directed air flow for enhanced heat exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a water cooling system is used to cool the thrust bearing, then the cooling effect is improved, but the risk of contamination and premature failure increases
Solution Approach 1:
The patent introduces an oil deflector as an intermediary component between the thrust bearing and the oil sump wall. The deflector creates a controlled gap that channels hot oil away from the bearing while allowing cooler oil to flow back, establishing a thermal circulation path without requiring external water cooling systems.
Solution Approach 2:
The system uses the lubricating oil itself as the cooling medium, eliminating the need for separate water cooling systems. The oil naturally circulates through the gap created by the deflector, absorbing heat from the thrust bearing and dissipating it along the sump wall, thereby serving its own cooling needs.
2Temperature
If water cooling passages are immersed in the oil sump, then the cooling efficiency is improved, but the complexity of the system increases
Solution Approach 1:
The patent extracts the cooling function from a separate water cooling system and integrates it into the existing lubrication system. By removing the need for external water passages and cooling mechanisms, the design simplifies the overall system while maintaining effective cooling through the oil deflector's gap structure.
3Temperature
If water with contaminants is used for cooling, then the cooling capability is improved, but the harmful effects increase
Solution Approach 1:
The patent maintains homogeneity by using the same lubricating oil for both lubrication and cooling functions. This eliminates the interface between different fluids (water and oil) that would otherwise create contamination risks, ensuring that only clean, system-appropriate oil contacts the thrust bearing throughout the cooling cycle.
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 method effectively cools the lubricating oil, reducing the risk of premature failures and maintaining the integrity of the thrust bearing by utilizing the oil's pumping ability to facilitate cooling and re-circulation, while minimizing the need for water-based cooling systems.
Implementation Method 1
the oil deflector configured to guide oil received from the thrust bearing to the gap to allow oil to flow down along the inside surface of the wall
Implementation Method 2
allow oil to flow down along the inside surface of the wall
Data Source
AI summary
Vertical motors having a thrust bearing and an oil deflector positioned in an oil sump in which the thrust bearing is located are disclosed. Oil flowing through the thrust bearing may be spread across the oil deflector and directed down along an inside surface of a wall of the oil sump to allow the oil to cool. The oil deflector may be polished sheet metal. In some embodiments, a plurality of fins may be arranged around an outside surface of the wall to provide additional heat exchange. A fan may additionally be provided to direct air flow between the plurality of fins to further facilitate the heat exchange. Methods of cooling a thrust bearing in a vertical motor are also provided, as are other aspects.