Sensorized Guide Bush Layout for Accurate Wear Detection
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Solution Overview
Problem
Existing guide devices for moving parts in sliding friction contact lack effective predictive maintenance capabilities, leading to potential critical malfunctions due to inadequate wear detection and communication.
Innovation Solution
A guide device comprising a metal bush with sensors exclusively disposed on one or two longitudinal sides, a wireless communication system to transmit wear information, and features like lubricant reservoirs and conductive strips for enhanced wear detection and communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensors are disposed in the central portion of the bush, then the device structure is simpler, but the detection of wear is less accurate because mechanical stresses are concentrated on the sides
Solution Approach 1:
The patent applies local quality by positioning sensors specifically on the longitudinal sides of the bush where mechanical stresses and wear occur most frequently. This localized sensor placement optimizes wear detection accuracy in the critical high-stress zones rather than distributing sensors uniformly or placing them in the central portion where wear is minimal.
2Ease of operation
If the detection system covers 360° wear detection, then assembly is simplified and orientation is not critical, but the device complexity and cost increase
Solution Approach 1:
The patent implements partial action by providing an optional angular range of detection (at least 3° about the central axis) rather than requiring full 360° coverage. This allows the detection system to focus on the critical wear zones where mechanical stresses concentrate, achieving sufficient wear detection capability with reduced system complexity and lower cost while still enabling predictive maintenance.
3Measurement precision
If multiple sensors are distributed over larger angular ranges, then wear detection accuracy improves, but the device cost and complexity increase
Solution Approach 1:
The patent applies partial action by configuring sensors to detect wear over a minimal adequate angular range (at least 3° about the central axis) rather than requiring extensive angular coverage. This provides the necessary wear detection precision in the critical stress zones while minimizing the number of sensors needed and reducing overall system complexity and cost.
Data Source
AI summary
A guide device includes: a metal component in the form of a bush provided with a friction surface intended to receive a mating part in frictional contact by sliding with oscillation; a wear sensing system of the friction surface having one or more sensors; and a wireless communication system connected to the detection system and configured to transmit information relating to the wear of the friction surface out of the guide device. The sensor or sensors are arranged exclusively on one longitudinal side or on two longitudinal sides of the bush, each longitudinal side being defined over at most two fifths of the length of the annular bush.