Rotating Gearbox Oil Temperature Sensing With Wireless Feedback
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Solution Overview
Problem
Mechanical components, such as gearboxes, lack effective condition monitoring systems to detect impending failure, which can lead to unexpected breakdowns despite regular maintenance, as current technologies do not provide timely information on temperature increases, vibration changes, and oil chemistry alterations.
Innovation Solution
A wireless gearbox temperature measurement device that rotates with the gearbox, using a thermistor to measure oil temperature and transmit data wirelessly via protocols like WiFi, Bluetooth, or Zigbee to a central device, allowing for real-time monitoring and alerting of potential failures through a control system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wireless temperature measurement device is installed in a rotating gearbox, then real-time temperature monitoring capability is improved, but the device must withstand alternating exposure to oil and atmosphere which complicates the measurement reliability
Solution Approach 1:
The patent applies the dynamics principle by designing a temperature measurement device that rotates with the gearbox, accepting and adapting to the dynamic environmental conditions of alternating oil and atmosphere exposure. The device is positioned in a rotating housing where it periodically submerges in and emerges from the lubricating oil, dynamically adapting to changing thermal and chemical environments while maintaining continuous temperature monitoring capability.
2Reliability
If periodic maintenance is performed on mechanical components, then component failures are avoided, but timely information on temperature increases and other failure indicators is not available
Solution Approach 1:
The patent implements feedback by continuously monitoring temperature and other condition parameters (vibration, oil chemistry) and transmitting this information in real-time to external monitoring systems. This feedback loop enables operators to detect impending failures through temperature increases and take corrective action before actual failure occurs, replacing the reactive periodic maintenance approach with proactive condition-based maintenance.
3Reliability
If mechanical components are monitored for condition, then timely failure prevention is achieved, but the complexity of the monitoring system increases
Solution Approach 1:
The patent applies universality by designing a multi-functional monitoring device that simultaneously measures multiple parameters (temperature, vibration, oil chemistry) using a single integrated sensor assembly. This universal approach consolidates what would otherwise require separate monitoring systems, reducing overall system complexity while providing comprehensive condition monitoring for predictive maintenance.
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 timely decision-making for maintenance and operation of gearboxes by providing critical temperature data, extending the life of mechanical components and reducing the risk of unexpected failures, with the ability to be retrofitted into existing gearboxes without significant modifications.
Implementation Method 1
a wireless transceiver in communication with a thermistor embedded within a sensor housing
Data Source
AI summary
A transmission in combination with a temperature measurement device and a device exterior to the transmission. The transmission includes a rotatable housing which drives a wheel of a vehicle, a wireless transceiver in communication with a thermistor embedded within molding, a battery embedded within the molding, and the molding resides within the housing. The temperature measurement device resides in a wall of the rotatable housing and the rotatable housing includes an interior volume. The interior volume of the rotatable housing is partially filled with oil for lubrication of transmission components residing within the interior volume of the housing. The temperature measurement device is rotated through the oil and out of the oil within the rotating housing when the rotating housing is in motion. The wireless transceiver is in communication with the device exterior to the transmission and communicates a temperature measurement from the temperature sensor and battery state of charge information to the device exterior to the transmission.