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System and method for measuring motor bearings consumption of railway vehicles

一种电机轴承、轨道车辆的技术，应用在机械轴承测试、轴承、轴和轴承等方向

Active Publication Date: 2019-05-28
ALSTOM TRANSPORT TECH SAS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main disadvantage of such systems based on mechanical measurement of motor vibrations is that new sensors must be added, and when these sensors fail, the system can stop the motor being monitored
In addition, electrical measurements such as phase current analysis are used, but these techniques require powerful boards for timely analysis

Method used

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  • System and method for measuring motor bearings consumption of railway vehicles
  • System and method for measuring motor bearings consumption of railway vehicles
  • System and method for measuring motor bearings consumption of railway vehicles

Examples

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Embodiment Construction

[0026] Briefly, the system of the invention comprises: a tone wheel fixed to the motor rotor shaft of a rail vehicle, which rotates under the action of a plurality of bearings; and a speed sensor fixed to the stationary part of the motor itself and facing said tone wheel .

[0027] If the bearings start to wear out due to the rotational movement of the shaft, the shaft will move radially towards the fixed part of the motor, causing the tone wheel to move towards or away from the transducer.

[0028] It is known that the vibration of the rotor produces an air gap variation between the teeth of the tone wheel and the sensor, which produces a modulation in the sine wave measured by the sensor.

[0029] In fact, said sensor is commonly used in prior art systems to indirectly measure the speed of a rail vehicle by measuring the speed of a tonewheel which produces a quasi-sine wave as the teeth and grooves of the tonewheel alternately pass in front of it.

[0030] In prior art syst...

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Abstract

The invention relates to a system and method for measuring motor bearings consumption of railway vehicles. The system for measuring motor bearings consumption of railway vehicles, comprises: a phonicwheel (2), arranged to be fixed to a shaft of a rotor, having a profile including an alternation of teeth and holes; a sensor (4), arranged to measure a punctual air-gap between the teeth of the phonic wheel (2) and said sensor (4) during rotation of the shaft, said sensor (4) generating a basic sinusoidal signal function of said profile, wherein the basic sinusoidal signal is superimposed to a modulating wave, representative of a radial motion of the shaft, the basic signal and the modulating wave forming a complete signal; characterized in that the sensor (4) further comprises: a control unit (4a) arranged to measure a maximum and a minimum amplitude value of the complete signal, said maximum and minimum amplitude values representing the maximum and minimum air-gap between the phonic wheel (2) and the sensor (4), and for calculating an air-gap swing value; memory means (4b) arranged to store said air-gap swing value; wherein said sensor (4) is arranged to send to an external controlunit (6) said air-gap swing value when the shaft stops rotating.

Description

technical field [0001] The present invention relates to a system and method for measuring bearing loss of rail vehicle motors. Background technique [0002] Condition Based Maintenance (CBM) of traction motors for rail vehicles is a very demanding task. It not only needs to eliminate the faults of the overall operation service to prevent customers from having a bad impression of the reliability of the rail operator, But also need to avoid unnecessary maintenance, in order to save costs. [0003] Dedicated sensors to detect and monitor possible motor faults are often integrated into rail vehicle systems. [0004] Bearings are a more vulnerable component to these failures. To achieve the early detection of motor bearing failures, several techniques have been used, usually based on temperature sensors, accelerometers, microphones, etc., and generally using mechanical measurements. [0005] Document US4835467A discloses a magnetoresistive sensor generating a DC biased speed s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H11/02
CPCG01P3/481G01P21/02G01M13/021G01M13/04G01B7/14G01B7/144F16C17/246B60L2200/26G01N3/56
Inventor 达维德·巴里尼贾科莫·马卡利
Owner ALSTOM TRANSPORT TECH SAS
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