Bearing Test Rig Actuator Segmentation for Misalignment Stiffness
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Solution Overview
Problem
Current testing rigs for crankshaft bearings fail to accurately replicate the dynamic load and angular misalignment conditions experienced by engine bearings, leading to reduced system stiffness and performance.
Innovation Solution
A two-directional radial load and misalignment testing device that applies vertical and horizontal loads, along with first and second misalignment loads, to simulate the operational conditions of engine bearings, using a combination of hydraulic actuators and pivotable hydrostatic joints to maintain system stiffness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If angular misalignment is simulated under high load and speed, then the ability to evaluate dynamic misalignment effects is improved, but system stiffness is reduced
Solution Approach 1:
The testing system is segmented into multiple independent actuators: vertical actuator for radial load, horizontal actuator for radial load, first misalignment actuator for angular misalignment in one direction, and second misalignment actuator for angular misalignment in the other direction. This segmentation allows each actuator to perform its specific function independently, enabling comprehensive bearing evaluation while maintaining system stiffness through proper structural design.
2Measurement precision
If multiple actuators are added to replicate instantaneous load and angular misalignment histories, then testing accuracy is improved, but device complexity increases
Solution Approach 1:
Each actuator in the system is designed with multi-functionality to reduce overall complexity. The vertical and horizontal actuators can apply radial loads while also contributing to misalignment simulation when coordinated with the dedicated misalignment actuators. This universal design approach allows the system to achieve high testing accuracy for both load and angular misalignment histories without proportionally increasing device complexity.
Data Source
AI summary
A testing rig and method of testing a bearing with the rig, wherein the rig includes a bearing housing, wherein said bearing housing includes an opening and a drive shaft extending into said opening, wherein the drive shaft is rotatable around a bearing axis. The testing rig also includes a vertical actuator mounted on the bearing housing for applying a vertical load to the bearing housing and a horizontal actuator mounted on the bearing housing for applying a horizontal load to the bearing housing. In addition, the testing rig includes a first misalignment actuator coupled to the first actuator for applying a first misalignment load to the bearing housing and a second misalignment actuator coupled to the bearing housing for applying a second misalignment load to the bearing housing.