Bearing Vibration Sensor Housing With Floating Ring Assembly
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Solution Overview
Problem
Existing detection devices for bearings, particularly those using piezoelectric materials, are complex to produce and assemble, with risks of film tearing and require intricate housing cavity creation, making them costly and prone to mechanical fixing issues.
Innovation Solution
A compact, inexpensive detection device with a metal housing body featuring a U-shaped cross-section, incorporating piezoelectric transducers and an elastic element for stress detection, which is simple to manufacture and assemble by using a snap-action coupling mechanism for secure attachment to the bearing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If piezoelectric films are directly glued on the stationary ring of the bearing, then vibration detection is enabled, but the production becomes complicated and there are risks of film tearing during assembly
Solution Approach 1:
The patent introduces an intermediate housing structure that houses the piezoelectric transducers and mediates between the bearing and the transducers. This intermediary structure eliminates the need for direct gluing of piezoelectric films to the bearing, thereby reducing production complexity and eliminating the risk of film tearing during assembly, while still enabling reliable vibration detection.
2Reliability
If a housing cavity is created in the bearing ring to accommodate piezoelectric plates, then detection functionality is achieved, but the production complexity increases due to cavity creation and component assembly
Solution Approach 1:
The patent segments the detection system into a separate housing unit that can be independently manufactured and then assembled to the bearing. This segmentation eliminates the need to create complex cavities within the bearing ring itself, reducing the structural complexity of the bearing while maintaining the detection functionality through the separate housing structure.
3Measurement precision
If spring elements are used to urge piezoelectric plates against bearing surfaces, then radial load detection is enabled, but the assembly process becomes more complex
Solution Approach 1:
The patent merges the spring urging mechanism with the housing structure itself, where the housing is designed to provide the necessary mechanical urging to the piezoelectric transducers through its configuration. This integration eliminates the need for separate spring components and their associated assembly steps, reducing assembly complexity while maintaining the precision of load detection.
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 provides high precision and reliability in detecting mechanical stresses, vibrations, and movements with reduced production complexity and assembly risks, enabling effective monitoring of bearing conditions.
Implementation Method 1
at least one piezoelectric transducer, in particular of the type designed to generate a potential difference or voltage in response to stresses or mechanical loads or vibrations
Data Source
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AI summary
A bearing detection device comprises: a housing body (2) having a substantially annular shape, prearranged for being fixed to a stationary ring (6a) of a bearing (6); and a detection arrangement on the housing body (2), comprising at least one piezoelectric transducer (10; 20). The detection arrangement further comprises: a floating body (7) having a substantially annular shape, which is mounted within the housing body (2) and is able to amplify mechanically vibrations of the bearing (6); a sensor unit (8) having a substantially annular shape, which is set in a substantially stationary position on the housing body (2), the supporting body (81) having a detection surface (8a) that is configured for receiving thereon, directly or via interposition of at least one further element, a corresponding surface of the floating body (7). The at least one piezoelectric transducer (10; 20) defines at least part of the detection surface (8a) and is configured for generating an electrical potential difference that is substantially proportional to the magnitude of a stress or force exerted by the floating body on the at least one piezoelectric transducer (10; 20).