JP2892745B2 - Bearing oil cut rub check device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to a bearing oil drain rub check device that rotatably supports, for example, a rotor of a rotary electric machine.

(Prior Art) Conventionally, as an example of this type of bearing oil draining rub check device, there is one configured as shown in FIG. An oil drain fin 3 for preventing bearing oil from scattering is disposed at the center of a bearing oil drain 2 on which the rotating shaft 1 is rotatably supported. In such a configuration, a microphone 7 for collecting sound is installed in the vicinity of the rotating shaft 1 and the oil-cutting fin 3 that are likely to be in contact with each other, and the audio signal collected by the microphone 7 is converted by the amplifier 8. The signal is amplified and output to the speaker 9. The sound generated by the speaker 9 is transmitted to the maintenance and inspection staff 10
A method of judging whether or not the rotating shaft 1 and the oil cutting fin 3 are in contact with each other has conventionally been generally used.

(Problems to be Solved by the Invention) However, in the configuration of FIG. 2, since the system is based only on the hearing of the maintenance inspector 10, when the rotating shaft 1 and the oil-cutting fin 3 are slightly in contact with each other, It is difficult to judge only by the hearing of the maintenance and inspection staff 10 in the problem that only the skilled maintenance and inspection personnel 10 can judge, and in the high rotation speed range where the rotation speed of the rotating shaft 1 is 300 RPM or more. For this reason, even if a known vibration monitoring device for a rotating body is used, it is not possible to determine a state in which the rotating shaft 1 is in contact with the oil-cutting fins 3 based on a change in the numerical value.

SUMMARY OF THE INVENTION An object of the present invention is to provide a bearing oil draining rub check device capable of reliably determining whether or not a rotary shaft is in contact with an oil draining fin.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a bearing oil drain that rotatably supports a rotating shaft of a rotating body, and a device between the bearing oil drain and the rotating shaft. Oil fins disposed in a gap existing in the fin to prevent scattering of bearing oil, a heat transfer body for transmitting heat generated by the oil fins, and a temperature detector for detecting the temperature of the heat transfer body And a temperature recording type for recording the temperature detected by the temperature detector.

(Operation) According to the present invention, the heat generated by the oil-cutting fins is input to the temperature detector via the heat transfer body, where a temperature change is detected, and the detection result is recorded on the temperature recorder. Therefore, by monitoring the recorded result, it is possible to reliably determine the contact between the rotating shaft and the oil-cut fin, and to provide a bearing oil-cut lab check device that can take countermeasures before a serious accident occurs. .

(Example) Hereinafter, an example of the present invention will be described with reference to FIG. That is, a bearing oil drain 2 that rotatably supports a rotating shaft 1 of a rotating body, and a plurality of oil drains for preventing bearing oil from scattering in a gap existing between the bearing oil drain 2 and the rotating shaft 1. The fins 3 are respectively provided along the outer peripheral surface of the rotating shaft 1. And, on the entire circumference of each oil drain fin 3,
In order to guide the heat generated here to the outside of the bearing oil drainer 2, a plurality of heat transfer members 4 having good thermal conductivity, for example, made of a metal material are provided at intervals. At the end of each heat transfer body 4, a temperature detector 5 for detecting the temperature of the heat transfer body 4 is provided.
Is connected to a temperature recorder 6 for recording this detection result.

In such a configuration, the temperature of the oil drain fins 3 is always detected by the temperature detector 5 via the heat transfer body 4, and the detection result is always recorded by the temperature recorder 6. In this case, when the rotating shaft 1 and the oil-cutting fin 3 are not in contact with each other, the temperature of the oil-cutting fin 3 is the same as the ambient temperature. However, if the rotating shaft 1 and the oil-cutting fins 3 come into contact for any reason, the oil-cutting fins 3 gradually generate heat due to frictional heat with the rotating shaft 1 and become higher than the ambient temperature around the oil-cutting fins 3. . Along with this, a temperature change appears in the result of the temperature recorder 6, so that the temperature recorder 6
By monitoring the result, the contact state between the rotary shaft 1 and the oil-cut fins 3 can be reliably determined. Further, it can be used for factor analysis when unstable vibration occurs. In addition, a plurality of heat transfer bodies 4
Are arranged at intervals on the oil-cutting fins 3, so that the detected temperature is different between the portion where the rotating shaft 1 and the oil-cutting fins 3 are in contact and the portion where they are not in contact. By adopting a configuration in which the location of each heat transfer body 4 corresponds to the result of the temperature recorder 6, the contact portion can be found earlier.

In the above-described embodiment, the plurality of heat transfer members 4 are provided on the oil-cut fins 3 and the heat detectors 4 are provided with the respective temperature detectors 5. However, depending on the application, the heat transfer members 4 are not necessarily required. The present invention is not limited to the case in which a plurality of the temperature detectors 5 are provided. And any configuration may be used as long as the configuration can be recorded in the temperature recorder 6.

[Effects of the Invention] According to the present invention, the heat generated by the oil-cutting fins is input to a temperature detector via a heat transfer body, where a temperature change is detected, and the detection result is recorded on a temperature recorder. Therefore, by monitoring the recorded results, it is possible to reliably determine the contact between the rotating shaft and the oil-cut fins, and to provide a bearing oil-cut lab check device that can take countermeasures before a serious accident occurs. Can be provided.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a bearing oil cutting rub checking device according to the present invention, and FIG. 2 is a block diagram showing an example of a conventional bearing oil cutting rub checking device. DESCRIPTION OF SYMBOLS 1 ... Rotating body, 2 ... Bearing oil drain, 3 ... Oil drain fin, 4 ... Heat transfer body, 5 ... Temperature detector, 6 ... Temperature recorder.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI G01K 1/16 G01K 1/16

Claims (1)

(57) [Claims] A bearing oil drain rotatably supporting a rotary shaft of a rotating body; and an oil disposed in a gap between the bearing oil drain and the rotary shaft for preventing bearing oil from scattering. A cutting fin, a heat transfer element for transmitting heat generated by the oil cutting fin, a temperature detector for detecting the temperature of the heat transfer element, and a temperature recording type for recording the temperature detected by the temperature detector. Bearing oil cut lab check device.