Vehicle Track Tensioner Pressure Indication Without Oil Contact
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Solution Overview
Problem
Conventional track systems for vehicles face issues with oil leaks, oil contamination, and reduced durability due to the reliance on oil pressure indicators, which are prone to failure when oil becomes soiled with dust or debris.
Innovation Solution
A track system that includes a tensioner with a hydraulic cylinder and accumulator, and an indicator that conveys the pressure of the hydraulic fluid without direct contact, thereby reducing oil leaks and contamination and improving durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If conventional oil pressure indicators are used to indicate tensioner load, then the indicator can provide pressure information, but the indicator becomes prone to oil leaks and contamination when oil mixes with dust or debris
Solution Approach 1:
A magnetic coupling mechanism serves as an intermediary between the hydraulic fluid chamber and the indicator. The magnetic field transfers pressure information from the hydraulic fluid to the indicator without requiring direct physical contact or penetration of the fluid seal, thereby eliminating oil leaks and contamination while maintaining reliable pressure indication.
Solution Approach 2:
The conventional mechanical or direct-contact pressure indication system is replaced with a magnetic field-based indication system. The magnetic coupling allows pressure information to be transmitted through the chamber wall without mechanical penetration, substituting a non-contact magnetic field for a contact-based mechanical system and thereby improving reliability.
2Measurement precision
If the indicator contacts the hydraulic fluid to measure pressure, then direct pressure measurement is achieved, but oil leaks and contamination occur
Solution Approach 1:
The magnetic coupling mechanism acts as an intermediary that transmits pressure information from the hydraulic fluid to the external indicator without the indicator contacting the fluid. The magnetic field penetrates the chamber wall to convey pressure data while the fluid remains sealed, eliminating leaks and contamination while maintaining measurement precision.
Solution Approach 2:
Direct mechanical contact measurement is replaced with a magnetic field-based measurement system. The magnetic coupling allows the indicator to sense pressure changes in the hydraulic fluid through the chamber wall without physical contact, substituting a non-contact magnetic sensing mechanism for a contact-based mechanical system.
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
The solution effectively provides a reliable indication of tensioner pressure, reducing oil-related issues and enhancing the overall durability and performance of the track system.
Implementation Method 1
a tensioner configured to control a tension of the track, the tensioner comprising a hydraulic cylinder and a hydraulic accumulator in fluid communication with the hydraulic cylinder and configured to receive hydraulic fluid
Data Source
AI summary
A track system for a vehicle (e.g., an agricultural vehicle), wherein the track system is configured to provide an indication that is representative of a pressure of a hydraulic fluid inside a tensioner while reducing oil leeks, oil contamination and improving durability of the track system. For instance, the track system includes a track that comprises a ground-engaging outer surface and an inner surface opposite to the ground-engaging outer surface, a track-engaging assembly configured to drive and guide the track around the track-engaging assembly and comprising a plurality of track-contacting wheels, a tensioner configured to control a tension of the track, and an indicator configured to convey an indication that is representative of a pressure of a hydraulic fluid inside the tensioner without contacting the hydraulic fluid.