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sensorized bearing unit

A technology of strain sensor and bearing, which is applied to bearing elements, rotating bearings, bearings, etc., can solve the problems of low strain sensitivity of foil strain sensors, and the sensor is not suitable for automatic installation and integration.

Inactive Publication Date: 2011-11-30
AB SKF
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] The attachment of foil strain sensors to the bearing surface is an essentially manual process, making these sensors unsuitable for automated installation and integration in a production line environment
In addition, foil strain sensors have very low strain sensitivity, which necessitates signal conditioning at low operating voltages in common with concurrently used electronic systems

Method used

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Examples

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Embodiment Construction

[0039] When it is necessary to measure the load acting on a rotating support component, one way to do this is to measure the deformation of the bearing rings in the bearings that support the component. This load causes deformation of the bearing ring, the deformation of which is measured by attaching one or more strain sensors to the surface of the bearing ring, for example to the outer circumference of the bearing outer ring. Strain sensors, such as plastic foil strain gauges, can be adhesively attached to bearing surfaces, but adhesive attachment is a time-consuming process and is usually accomplished manually. Its further disadvantage is that over time the adhesive can undergo creep, which impairs the reliability of the strain signal. Metal foil strain gages can also be applied whereby the perimeter of the metal foil strain gage is welded to the bearing surface using a specific solder spot pattern. Therefore, the spot welding process is relatively time-consuming and compli...

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Abstract

The invention defines a bearing unit comprising a bearing provided with one or more strain sensors, wherein the bearing comprises an inner ring and an outer ring, and wherein the one or more strain sensors (10) are included on a support member (12) Integrated sensing element (14). According to the invention, the supporting member is a thin plate made of metallic material and is only connected to the The surface of the bearing (5). The invention also defines a method of attaching the strain sensor (10) to the bearing surface (5).

Description

technical field [0001] The invention relates to a bearing or bearing unit provided with one or more sensors for measuring strain in the bearing. The invention also relates to a method of connecting one or more sensors to a bearing by means of a thermal joining process. Background technique [0002] Bearings are devices that allow forced relative motion between two parts. They can be used in many different types of machines to hold and support rotating parts such as the wheels of a vehicle, the blades on a windmill or the drum of a washing machine. A typical bearing includes inner and outer rings and a plurality of rolling elements, and may also include a cage to hold the rolling elements. [0003] In use, bearings are subjected to different loads, both static and dynamic. Static loads are primarily due to gravity supported by the bearings, and can also be due to preload of the mounting bearings. Dynamic loads are time dependent and due to operating conditions. [0004] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C19/52G01L1/22
CPCG01L5/0019F16C19/522F16C33/586Y10T29/49103
Inventor 亨德里克.A.莫尔约翰尼斯.F.范德桑登
Owner AB SKF
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