JPH03226641A - Abnormality monitoring apparatus for bearing - Google Patents
Abnormality monitoring apparatus for bearingInfo
- Publication number
- JPH03226641A JPH03226641A JP2300090A JP2300090A JPH03226641A JP H03226641 A JPH03226641 A JP H03226641A JP 2300090 A JP2300090 A JP 2300090A JP 2300090 A JP2300090 A JP 2300090A JP H03226641 A JPH03226641 A JP H03226641A
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- temperature
- pad
- amount
- bearing pad
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000012544 monitoring process Methods 0.000 title claims abstract description 8
- 230000005856 abnormality Effects 0.000 title abstract description 11
- 239000000498 cooling water Substances 0.000 claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000012806 monitoring device Methods 0.000 claims description 14
- 239000003921 oil Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 3
- 101100450138 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) hat-2 gene Proteins 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
Landscapes
- Mounting Of Bearings Or Others (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
Description
この発明は、例えば水車の軸受のように、軸と一体に形
成されたカラーを支持する軸受パッドの外筒部に水室を
備え、この水室に冷却水を流通させて軸受パッドを直接
水冷する軸受において、軸受の状態を監視する軸受の異
常監視装置に関する。This invention provides a water chamber in the outer cylindrical part of a bearing pad that supports a collar formed integrally with the shaft, such as a bearing of a water turbine, and cools the bearing pad directly by water cooling water flowing through the water chamber. The present invention relates to a bearing abnormality monitoring device for monitoring the condition of a bearing.
第３図は従来の水車の軸受の縦断面図である。
第３図において、軸１と一体に形成されたカラー１ａを
支持する軸受パッド２と、この軸受パッド２を収納する
油槽３と、油槽３内に満たされた潤滑油（以下油という
）４とを備えて軸受が構成され、軸１に生じる半径方向
の力を受けながら軸１は定められた軸受間隙Ｇをもって
支持されている。
軸受パッド２には外筒部に水室６を備え、水室６には入
口配管７と出口配管８とを備え、適量の冷却水を流通さ
せ、軸受パッド２を直接冷却するように構成されている
。軸受パッド２には、軸受パッドの温度を測定する温度
センサ５を備えている。
水車運転中ば機械的な損失により熱が発生すＺが、軸受
パッド２の発生熱量の増減は、軸１と軸受パッド２との
間隙の増減と密接に関連していＺ軸１と軸受パッド２と
の間隙は、小さすぎると軸受パッド２の焼き付をおこし
、大きすぎると軸振動を引き起こすために、運転中の軸
受間隙Ｇはある幅の範囲内に保持することが重要である
。
ここで、運転中にこの軸受間隙Ｃを監視することば掻め
て困難であるから、従来は軸受の異常を監視する手段と
して、軸受パッド２の温度を温度センサ５により測定し
て間接的に軸受の状態を監視していた。FIG. 3 is a longitudinal sectional view of a conventional water turbine bearing. In FIG. 3, a bearing pad 2 supporting a collar 1a formed integrally with the shaft 1, an oil tank 3 housing this bearing pad 2, and a lubricating oil (hereinafter referred to as oil) 4 filled in the oil tank 3 are shown. The shaft 1 is supported with a predetermined bearing gap G while receiving a radial force generated on the shaft 1. The bearing pad 2 is equipped with a water chamber 6 in its outer cylinder, and the water chamber 6 is equipped with an inlet pipe 7 and an outlet pipe 8, and is configured to allow an appropriate amount of cooling water to flow through it to directly cool the bearing pad 2. ing. The bearing pad 2 is equipped with a temperature sensor 5 that measures the temperature of the bearing pad. Heat is generated due to mechanical loss during operation of the water turbine.The increase or decrease in the amount of heat generated by the bearing pad 2 is closely related to the increase or decrease in the gap between the shaft 1 and the bearing pad 2. If the gap G is too small, it will cause seizure of the bearing pad 2, and if it is too large, it will cause shaft vibration, so it is important to maintain the bearing gap G within a certain width range during operation. Here, since it is extremely difficult to monitor the bearing gap C during operation, conventionally, as a means of monitoring abnormalities in the bearing, the temperature of the bearing pad 2 is measured by a temperature sensor 5, and the bearing is indirectly was monitoring the condition.
しかしながら、軸受温度センサ５は軸受パッド２と軸１
との接触面の温度を直接測定できないので、測定温度が
一定であっても、冷却水９の温度変化で軸受パッド２の
内径が変わることムこよって生じる軸受間隙Ｇの変化を
的確に監視できないという問題があった。
また、冷却水９の流量が変わると、持ら去られる熱量が
変化するため、測定された軸受パッド２の温度が一定で
あっても、軸受パッドの発生熱量は必ずしも一定ではな
いという問題もあった。従って、従来のように軸受パッ
ド２の温度を監視するだけでは軸受間隙や発生熱量の変
化を的確に把握できず、軸受の異常状態を監視するには
不十分であった。
この発明は、軸受パッドの発生熱量の大部分が冷却水に
より持ち出されることに着目し、軸受パッドの温度及び
軸受冷却水の発生熱量を測定して軸受の状態を総合的に
監視する軸受の異常監視装置を提供することを目的とす
る。However, the bearing temperature sensor 5 is connected to the bearing pad 2 and the shaft 1.
Since the temperature of the contact surface cannot be directly measured, even if the measured temperature is constant, changes in the bearing gap G caused by changes in the internal diameter of the bearing pad 2 due to changes in the temperature of the cooling water 9 cannot be accurately monitored. There was a problem. Additionally, if the flow rate of the cooling water 9 changes, the amount of heat carried away changes, so even if the measured temperature of the bearing pad 2 is constant, the amount of heat generated by the bearing pad is not necessarily constant. Ta. Therefore, simply monitoring the temperature of the bearing pad 2 as in the past has not been able to accurately grasp changes in the bearing gap or the amount of heat generated, and has been insufficient to monitor abnormal conditions of the bearing. This invention focuses on the fact that most of the heat generated by the bearing pad is carried away by the cooling water, and the present invention measures the temperature of the bearing pad and the amount of heat generated by the bearing cooling water to comprehensively monitor the condition of the bearing. The purpose is to provide a monitoring device.
上記目的は、軸と一体に形成されたカラーを支持する軸
受パッドと、この軸受パッドを収納する油槽と、この軸
受パッドの外筒部ムこ配置された水室とを備え、この水
室に冷却水を流通させて前記軸受パッドを直接水冷する
軸受において、前記軸受ハンドの温度を測定する温度セ
ンサと、前記冷却水の軸受出口及び入口温度を測定する
温度センサと、前記冷却水量を測定する流量計と、これ
らの温度センサ及び流量計からの測定値を入力させて前
記軸受パッドの発生熱量と軸受間隙とを求めるとともに
、求められた軸受間隙に対応して軸受パッドの温度及び
発生熱量が予め定められた値を超えたとき警報を発する
総合監視装置とからなり、この総合監視装置により前記
軸受間隙及び前記軸受ハンドの発生熱量を測定して前記
軸受の状態を監視することによって達成される。The above object includes a bearing pad that supports a collar that is formed integrally with the shaft, an oil tank that houses this bearing pad, and a water chamber that is placed in the outer cylindrical part of this bearing pad. In a bearing that directly cools the bearing pad by flowing cooling water, a temperature sensor that measures the temperature of the bearing hand, a temperature sensor that measures the bearing outlet and inlet temperatures of the cooling water, and a temperature sensor that measures the amount of the cooling water. The amount of heat generated by the bearing pad and the bearing gap are determined by inputting the measured values from the flowmeter, these temperature sensors, and the flowmeter, and the temperature and amount of heat generated by the bearing pad are calculated in accordance with the determined bearing gap. This is achieved by monitoring the condition of the bearing by measuring the amount of heat generated by the bearing gap and the bearing hand using the comprehensive monitoring device that issues an alarm when a predetermined value is exceeded. .
軸受パッドの水室に冷却水を流通させ、軸受パッドを直
接水冷する軸受において、軸受パッドの温度を測定する
温度センサと、冷却水の軸受出口及び入口温度を測定す
る温度センサと、冷却水の流量を測定する流量計と、こ
れらの温度センサ及び流量計からの測定値を入力させて
前記軸受パッドの発注熱量と軸受間隙とを求めるととも
に、求められた軸受間隙に対応して軸受パッドの温度及
び発生熱量が予め定められた値を超えたとき警報を発す
る総合監視装置とからなり、この総合監視装置により前
記軸受間隙を測定するとともに前記軸受パッドの発生熱
量を測定して、前記軸受パッドの温度及び発生熱量が前
記軸受間隙に対し規定値を超えないように監視するので
、冷却水の流量または温度が変わっても、軸受の異常を
的確に監視できる。In a bearing that directly cools the bearing pad by flowing cooling water through the water chamber of the bearing pad, there is a temperature sensor that measures the temperature of the bearing pad, a temperature sensor that measures the bearing outlet and inlet temperatures of the cooling water, and a temperature sensor that measures the bearing outlet and inlet temperatures of the cooling water. A flowmeter that measures the flow rate, and the measured values from these temperature sensors and flowmeters are input to determine the amount of heat ordered for the bearing pad and the bearing gap, and the temperature of the bearing pad is determined in accordance with the determined bearing gap. and a comprehensive monitoring device that issues an alarm when the amount of heat generated exceeds a predetermined value.This comprehensive monitoring device measures the bearing gap, measures the amount of heat generated by the bearing pad, and measures the amount of heat generated by the bearing pad. Since the temperature and amount of heat generated are monitored so as not to exceed the specified values for the bearing gap, abnormalities in the bearing can be accurately monitored even if the flow rate or temperature of the cooling water changes.
以下図面に基づいてこの発明の詳細な説明する。第１図
はこの発明の実施例による異常監視装置を備えた軸受の
縦断面図である。第１図において第３図と同じ部位は同
じ番号を付している。
第１図において、軸ｌと一体に形成されたカラーｌａを
支持する軸受パッド２と、この軸受パッド２を収納する
油槽３と、油槽３内に満たされた油４とを備えて軸受が
構成され、軸１に生じる半径方向力を受けながら軸１は
定められた軸受間隙Ｇをもって支持されている。軸受パ
ッド２の外筒部には水室６が設けられ、水室６には入口
配管７と出口配管８とを通して適量の冷却水９を流し、
軸受パッド２を冷却する構造となっている。
この発明の実施例による軸受の異常監視装置は、軸受ハ
ツト２の温度を測定する温度センサ５と、冷却水９の軸
受入口温度を測定する温度センサ１０と、軸受出口温度
を測定する温度センサ１１と、冷却水９の流量を測定す
る流量計１３とを備え、これらの温度センサ５．１０．
１１及び流量計１３からの測定値を入力させて軸受パッ
ド２の発生熱量と軸受間隙とを求めるとともに、求めら
れた軸受間隙に対応して軸受パッドの温度及び発生熱量
が予め定められた値を超えたとき警報を発する総合監視
装置１２とから構成される。
第２図は軸受間隙をパラメータとして軸受パッド温度と
軸受パッド発生熱量との関係を示す図である。第２図に
おいて、軸受間隙が小さくなれば、同一の軸受パット温
度に対して軸受パッド発生熱量が大きくなることがわか
る。発生熱量が一定の値を超えると油膜切れなどの問題
を起こすので、第２図の斜線の範囲Ａ内で軸を運転する
必要がある。軸受パッド２の発生熱量は冷却水の流量と
冷却水出口温度及び冷却水人口温度とから求められ、軸
受間隙Ｇは軸受パッド温度と冷却水入口温度から求める
ことができるので、総合監視装置１２により軸受の状態
を把握し、総合監視装置１２は軸受が第２図の領域Ａの
範囲外で運転されるとき警報を発する。
冷却水の温度は、季節により５°Ｃ〜２０６Ｃに変化し
、この温度変化により軸受間隙が変化するので、軸受の
発生熱量も変化する。例えば、冷却水の温度が２０°Ｃ
から５°Ｃに変化した場合、冷却水の温度が低いことか
ら軸受は温度上昇しないが、軸受間隙が小さくなるので
発生熱量が増加し、従って冷却水の出口と入口との温度
差が増加して、確実に軸受の異常を発見する。The present invention will be described in detail below based on the drawings. FIG. 1 is a longitudinal sectional view of a bearing equipped with an abnormality monitoring device according to an embodiment of the present invention. In FIG. 1, the same parts as in FIG. 3 are given the same numbers. In FIG. 1, the bearing is composed of a bearing pad 2 that supports a collar la formed integrally with a shaft l, an oil tank 3 that houses this bearing pad 2, and oil 4 filled in the oil tank 3. The shaft 1 is supported with a predetermined bearing gap G while being subjected to a radial force generated on the shaft 1. A water chamber 6 is provided in the outer cylindrical portion of the bearing pad 2, and an appropriate amount of cooling water 9 is flowed into the water chamber 6 through an inlet pipe 7 and an outlet pipe 8.
It has a structure that cools the bearing pad 2. The bearing abnormality monitoring device according to the embodiment of the present invention includes a temperature sensor 5 that measures the temperature of the bearing hat 2, a temperature sensor 10 that measures the bearing inlet temperature of the cooling water 9, and a temperature sensor 11 that measures the bearing outlet temperature. and a flow meter 13 for measuring the flow rate of the cooling water 9, and these temperature sensors 5.10.
11 and the flowmeter 13 to determine the amount of heat generated by the bearing pad 2 and the bearing gap, and set the temperature and amount of heat generated of the bearing pad to predetermined values corresponding to the determined bearing gap. and a comprehensive monitoring device 12 that issues an alarm when the limit is exceeded. FIG. 2 is a diagram showing the relationship between the bearing pad temperature and the amount of heat generated by the bearing pad using the bearing gap as a parameter. In FIG. 2, it can be seen that as the bearing gap becomes smaller, the amount of heat generated by the bearing pad increases for the same bearing pad temperature. If the amount of heat generated exceeds a certain value, problems such as lack of oil film will occur, so it is necessary to operate the shaft within the shaded range A in FIG. The amount of heat generated by the bearing pad 2 can be determined from the flow rate of the cooling water, the cooling water outlet temperature, and the cooling water population temperature, and the bearing gap G can be determined from the bearing pad temperature and the cooling water inlet temperature. Ascertaining the condition of the bearing, the comprehensive monitoring device 12 issues an alarm when the bearing is operated outside of area A in FIG. The temperature of the cooling water changes from 5°C to 206°C depending on the season, and this temperature change changes the bearing gap, so the amount of heat generated by the bearing also changes. For example, if the cooling water temperature is 20°C
If the temperature changes from 5°C to 5°C, the temperature of the bearing will not rise because the temperature of the cooling water is low, but the bearing gap will become smaller, so the amount of heat generated will increase, and therefore the temperature difference between the outlet and inlet of the cooling water will increase. to ensure that bearing abnormalities are detected.
この発明によれば、軸受バッドの温度を測定する温度セ
ンサと、冷却水の軸受出口及び入口温度を測定する温度
センサと、冷却水の流量を測定する流量計と、これらの
温度センサ及び流量計からの測定値を入力させて軸受の
状態を監視する総合監視装置からなり、軸受ハツトの温
度が正常でも、軸受バッドの発生熱量及び軸受間隙から
軸受の異常を発見して警報を発することができる。従っ
て、季節に関係なく、さらに冷却水の流量にも関係なく
軸受の異常を的確に把握することがでる。According to the present invention, a temperature sensor that measures the temperature of a bearing bud, a temperature sensor that measures the bearing outlet and inlet temperatures of cooling water, a flowmeter that measures the flow rate of cooling water, and these temperature sensors and flowmeters are provided. It is a comprehensive monitoring device that monitors the condition of the bearing by inputting measured values from the bearing. Even if the temperature of the bearing hat is normal, it can detect abnormalities in the bearing from the amount of heat generated in the bearing bud and the bearing gap and issue an alarm. . Therefore, it is possible to accurately detect abnormalities in the bearing regardless of the season or the flow rate of the cooling water.
第１図はこの発明の実施例による異常監視装置を備えた
軸受の縦断面図、第２図は軸受の軸受パッド温度と軸受
パッド発生熱量との関係を示す図、第３図は従来の軸受
の縦断面図である。
１：軸、２：軸受パッド、３：油槽、４：油、５．１０
，１１：温度センサ、７：入口配管、８：出口配管、９
：冷却水、１２：総合監視装置、１３：流量計、Ｇ：軸
受間隙。
ト とFIG. 1 is a longitudinal cross-sectional view of a bearing equipped with an abnormality monitoring device according to an embodiment of the present invention, FIG. 2 is a diagram showing the relationship between the bearing pad temperature and the amount of heat generated by the bearing pad, and FIG. 3 is a diagram of a conventional bearing. FIG. 1: Shaft, 2: Bearing pad, 3: Oil tank, 4: Oil, 5.10
, 11: Temperature sensor, 7: Inlet piping, 8: Outlet piping, 9
: Cooling water, 12: Comprehensive monitoring device, 13: Flow meter, G: Bearing gap. To and
Claims (1)
と、この軸受パッドを収納する油槽と、この軸受パッド
の外筒部に配置された水室とを備え、この水室に冷却水
を流通させて前記軸受パッドを直接水冷する軸受におい
て、前記軸受パッドの温度を測定する温度センサと、前
記冷却水の軸受出口及び入口温度を測定する温度センサ
と、前記冷却水量を測定する流量計と、これらの温度セ
ンサ及び流量計からの測定値を入力させて前記軸受パッ
ドの発生熱量と軸受間隙とを求めるとともに、求められ
た軸受間隙に対応して軸受パッドの温度及び発生熱量が
予め定められた値を超えたとき警報を発する総合監視装
置とからなり、この総合監視装置により前記軸受間隙及
び前記軸受パッドの発生熱量を測定して前記軸受の状態
を監視することを特徴とする軸受の異常監視装置。1) A bearing pad that supports a collar that is formed integrally with the shaft, an oil tank that houses this bearing pad, and a water chamber that is placed in the outer cylinder of this bearing pad, and cooling water is supplied to this water chamber. In a bearing in which the bearing pad is directly cooled by water flowing through the bearing pad, a temperature sensor that measures the temperature of the bearing pad, a temperature sensor that measures the bearing outlet and inlet temperatures of the cooling water, and a flow meter that measures the amount of the cooling water. , input the measured values from these temperature sensors and flow meters to determine the amount of heat generated by the bearing pad and the bearing gap, and the temperature and amount of heat generated by the bearing pad are determined in advance in accordance with the determined bearing gap. a comprehensive monitoring device that issues an alarm when a certain value is exceeded; and the comprehensive monitoring device monitors the condition of the bearing by measuring the amount of heat generated in the bearing gap and the bearing pad. monitoring equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2300090A JP2765157B2 (en) | 1990-02-01 | 1990-02-01 | Bearing abnormality monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2300090A JP2765157B2 (en) | 1990-02-01 | 1990-02-01 | Bearing abnormality monitoring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03226641A true JPH03226641A (en) | 1991-10-07 |
| JP2765157B2 JP2765157B2 (en) | 1998-06-11 |
Family
ID=12098243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2300090A Expired - Lifetime JP2765157B2 (en) | 1990-02-01 | 1990-02-01 | Bearing abnormality monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2765157B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314996A (en) * | 2014-08-20 | 2015-01-28 | 兖矿集团有限公司 | A crusher and a bearing pedestal thereof |
| JP2015219098A (en) * | 2014-05-16 | 2015-12-07 | 株式会社ジェイテクト | Defect detection method and defect detection system |
| CN107782467A (en) * | 2017-10-20 | 2018-03-09 | 哈尔滨电机厂有限责任公司 | Large-sized water turbine generator thrust bearing thermal losses measuring system |
| CN108007691A (en) * | 2018-01-05 | 2018-05-08 | 广东省智能制造研究所 | A kind of electro spindle high-speed bearing thermal power test device and method |
| CN115539518A (en) * | 2022-11-28 | 2022-12-30 | 国能大渡河检修安装有限公司 | Multivariable hydroelectric generating set thrust bearing temperature regulation and control method |
-
1990
- 1990-02-01 JP JP2300090A patent/JP2765157B2/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015219098A (en) * | 2014-05-16 | 2015-12-07 | 株式会社ジェイテクト | Defect detection method and defect detection system |
| CN104314996A (en) * | 2014-08-20 | 2015-01-28 | 兖矿集团有限公司 | A crusher and a bearing pedestal thereof |
| CN107782467A (en) * | 2017-10-20 | 2018-03-09 | 哈尔滨电机厂有限责任公司 | Large-sized water turbine generator thrust bearing thermal losses measuring system |
| CN107782467B (en) * | 2017-10-20 | 2023-04-25 | 哈尔滨电机厂有限责任公司 | Large-scale hydraulic generator thrust bearing heat loss measurement system |
| CN108007691A (en) * | 2018-01-05 | 2018-05-08 | 广东省智能制造研究所 | A kind of electro spindle high-speed bearing thermal power test device and method |
| CN108007691B (en) * | 2018-01-05 | 2024-05-24 | 广东省智能制造研究所 | Device and method for testing thermal power of high-speed bearing of electric spindle |
| CN115539518A (en) * | 2022-11-28 | 2022-12-30 | 国能大渡河检修安装有限公司 | Multivariable hydroelectric generating set thrust bearing temperature regulation and control method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2765157B2 (en) | 1998-06-11 |
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