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Acoustic emission measuring device, power transmission device, and rolling bearing device

A technology of a power transmission device and a measuring device, applied in the fields of rolling bearing devices and power transmission devices, can solve the problems of unusable devices, weak AE signals, and high operating costs, and achieve the effects of easing the use limit, reducing operating costs, and reducing energy loss.

Inactive Publication Date: 2008-03-26
JTEKT CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the above-mentioned conventional device with an AE sensor, a power supply for amplifying the AE signal is required on the transmission side, and there is a problem of high running cost.
In addition, since the AE signal is transmitted using the transmission antenna, a large arrangement space for arranging the above-mentioned transmission antenna is required on the transmission side, and when the arrangement space on the transmission side of the device is small, there is a problem that the device cannot be used.
[0005] In addition, in order to avoid the above-mentioned space problem, that is, in order to ensure a sufficient arrangement space on the transmitting side, if the AE sensor is installed on the stationary body closest to the rotating body, the problem of the arrangement of the transmitting antenna can be solved, but there are the following problems : The AE signal becomes weak, the effective AE signal cannot be captured by the AE sensor, and the abnormality of the rotating body cannot be accurately judged

Method used

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  • Acoustic emission measuring device, power transmission device, and rolling bearing device
  • Acoustic emission measuring device, power transmission device, and rolling bearing device
  • Acoustic emission measuring device, power transmission device, and rolling bearing device

Examples

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Embodiment Construction

[0069] Hereinafter, the present invention will be described in detail by way of illustration.

[0070] FIG. 1 is a diagram showing the appearance of a part of an acoustic emission (AE) measurement device according to a first embodiment of the present invention.

[0071] This AE measuring device has a first coil storage box 2 and a second coil storage box 3 . The first coil storage box 2 has a substantially cylindrical shape. The above-mentioned first coil storage box 2 is fixed to an end surface at one axial end of the rotating shaft 1 and rotates synchronously with the rotating shaft 1 . The second coil storage box 3 has substantially the same shape as the first coil storage box 2 . The second coil storage box 3 is arranged adjacent to the first coil storage box 2 in the axial direction of the first coil storage box 2 with a slight gap therebetween. The above-mentioned second coil storage box 3 is fastened on the clamping part 4 by the nut 5, and is in a static state relat...

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PUM

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Abstract

An acoustic emission measuring device in which a piezoelectric element (63) used as an AE sensor is secured to the inner ring (62) of a ball bearing (61) fixedly fitted onto a rotating shaft (60). The axial end face of a roughly tire-shaped case (65), which is capable of rotating in synchronism with the inner ring (62) and storing a firs coil in which a current flows from the piezoelectric element (63), is secured to the inner ring (62). The axial end face of a roughly tire-shaped case (66) for storing a second coil is secured to an outer ring (64). The first coil and the second coil are oppositely disposed on the radial outer side of the rotating shaft (60) so that the first coil and the second coil can face to each other in the radial direction.

Description

technical field [0001] The invention relates to an acoustic emission measuring device. Furthermore, the present invention relates to a power transmission device having a power transmission member and an acoustic emission sensor (AE sensor). Furthermore, the invention relates to a rolling bearing arrangement with a rolling bearing and an acoustic emission sensor (AE sensor). Background technique [0002] Conventionally, as a device with an AE sensor provided with an acoustic emission (hereinafter referred to as AE) measuring device, there is a device described in Japanese Patent Application Laid-Open No. 9-26414. [0003] This device with AE sensor frequency-modulates the AE signal from the AE sensor installed on the rotating body in the FM modulation circuit, and amplifies the modulated AE signal, and then performs it wirelessly via the transmitting antenna and the receiving antenna. send receive. Furthermore, the AE signal received by the receiving antenna is input to th...

Claims

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Application Information

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IPC IPC(8): G01N29/14G01M13/02G01M13/04F16C19/52F16C41/00
Inventor 村上功小熊规泰
Owner JTEKT CORP
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