Gear Unit Lubricant Level Control for Reduced Power Loss
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Solution Overview
Problem
Existing gear units face challenges in adapting to varying conditions and requirements, particularly in maintaining reliable lubrication levels under changing temperatures, which affects their reliability, maintenance, and cost-effectiveness.
Innovation Solution
A gear unit design incorporating a toothed wheel, a lubricant reservoir, a displacement body, and a temperature-dependent actuator that adjusts the lubricant level by moving the displacement body in response to thermal changes, eliminating the need for external controllers and allowing for flexible integration in various applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a fixed lubricant level is maintained in the reservoir, then the gear unit structure is simple, but power loss increases due to insufficient lubrication at high temperatures
Solution Approach 1:
The patent applies the dynamics principle by making the lubricant level adjustable rather than fixed. The displacement body can change its position within the reservoir based on operating conditions, allowing the lubricant level to be dynamically optimized for different temperature and speed conditions, thereby reducing power loss without requiring a completely complex external control system
Solution Approach 2:
The actuator automatically adjusts the displacement body position based on temperature and rotation speed conditions without external intervention. This self-service mechanism responds to changing operating conditions by wetting or drying the actuator, which triggers automatic adjustment of the lubricant level, eliminating the need for complex external controllers while optimizing lubrication
2Reliability
If the lubricant level is increased to ensure adequate lubrication, then lubrication reliability improves, but power loss increases due to splashing at high rotation speeds
Solution Approach 1:
The patent implements dynamics by enabling the lubricant level to vary dynamically with operating conditions. At high rotation speeds, the actuator adjusts the displacement body to lower the lubricant level, reducing splashing losses. At low speeds or high temperatures, the lubricant level is increased to ensure adequate lubrication, thus resolving the contradiction between reliability and energy loss
Solution Approach 2:
The system changes the lubricant level parameter in response to changing operating conditions (temperature and rotation speed). The actuator detects these conditions and adjusts the displacement body position accordingly, optimizing the lubricant level parameter to balance adequate lubrication with minimal splashing losses under different operational scenarios
3Reliability
If manual adjustment of lubricant level is used, then device complexity is low, but maintenance requirements increase and reliability decreases
Solution Approach 1:
The actuator provides automatic self-service adjustment of the lubricant level based on temperature and rotation speed conditions. The actuator is wetted by the lubricant and automatically responds to changing conditions by adjusting the displacement body position, eliminating the need for manual intervention and external controllers, thus improving reliability without significantly increasing complexity
Solution Approach 2:
The system incorporates feedback through the actuator that is directly exposed to the lubricant and sensing the operating conditions (temperature and speed). This feedback mechanism enables automatic adjustment of the lubricant level in response to actual operating conditions, improving reliability while maintaining relatively simple system architecture
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 enables reliable and automatic adjustment of lubricant levels, reducing maintenance needs and operational losses, while maintaining efficiency across different operating conditions and scenarios.
Implementation Method 1
The rise and drop in temperature are caused by thermal conduction between the actuator and the lubricant
Implementation Method 2
The displacement of lubricant is caused, for example, by immersing the displacement body or by enlarging the displacement body, thereby leading to a rise in the lubricant level
Data Source
AI summary
A gear unit includes a toothed wheel, a reservoir receiving lubricant for lubricating the toothed wheel, a displacement body configured to set a lubricant level in the reservoir, and an actuator configured to move the displacement body as a function of a temperature as the displacement body is wetted with the lubricant.