JP2006329231A - Bearing device with sensor - Google Patents

Bearing device with sensor Download PDF

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JP2006329231A
JP2006329231A JP2005150009A JP2005150009A JP2006329231A JP 2006329231 A JP2006329231 A JP 2006329231A JP 2005150009 A JP2005150009 A JP 2005150009A JP 2005150009 A JP2005150009 A JP 2005150009A JP 2006329231 A JP2006329231 A JP 2006329231A
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Prior art keywords
sensor
bearing device
bearing
axle box
temperature
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JP2005150009A
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Japanese (ja)
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Hiroshi Nakao
宏志 中尾
Ikunori Sakatani
郁紀 坂谷
Koichi Morita
耕一 森田
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NSK Ltd
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NSK Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
    • F16C19/525—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions related to temperature and heat, e.g. insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
    • F16C19/38—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers
    • F16C19/383—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
    • F16C19/385—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings
    • F16C19/386—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings in O-arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2233/00—Monitoring condition, e.g. temperature, load, vibration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/10—Railway vehicles

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bearing device with a sensor for accurately detecting the temperature of a bearing even when the bearing is distant from the sensor. <P>SOLUTION: The bearing device 10 with the sensor comprises the sensor 14 for detecting the operating condition of the bearing 13. The sensor 14 consists of a sensor casing 15 mounted on a shaft box 12 of the bearing device 10 and a temperature detecting part 18 arranged on the sensor casing 15. The sensor casing 15 is mounted on the outer peripheral face of the shaft box 12, and a heat conductive member 26 is arranged between the sensor casing 15 and the shaft box 12. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、センサ付軸受装置に関するものであり、特に、軸受装置や機械装置等の運転状態を検知して、これらの異常を検出するセンサ付軸受装置に関する。   The present invention relates to a sensor-equipped bearing device, and more particularly, to a sensor-equipped bearing device that detects operating conditions of a bearing device, a mechanical device, and the like to detect these abnormalities.

従来、鉄道車両や自動車等の車軸を支持する軸受装置や機械設備等では、少なくとも温度センサを備えたセンサ付軸受装置が使用される（例えば、特許文献１参照。）。センサ付軸受装置は、温度センサが検出する温度から軸受装置や機械設備等の温度を推定して、軸受の焼付きや機械装置の異常を検出する。   2. Description of the Related Art Conventionally, a bearing device with a sensor including at least a temperature sensor is used in a bearing device, a mechanical facility, or the like that supports an axle of a railway vehicle or an automobile (see, for example, Patent Document 1). The sensor-equipped bearing device estimates the temperature of the bearing device, machine equipment, and the like from the temperature detected by the temperature sensor, and detects seizure of the bearing and abnormality of the machine device.

例えば、図３に示されるように、特許文献１に記載のセンサ付軸受装置１００では、図示しない車輪を固定した車軸１０１を軸箱１０２に対して回転可能に支持するための複列の円錐ころ軸受１０３が、車軸１０１と軸箱１０２との間に配置されている。また、車軸１０１の軸端には、速度検出用リング１０４が取り付けられたエンドキャップ１０５が固定されており、軸箱１０２のカバー１０６にボルト止めされたセンサ１０７は、速度検出用リング１０４の外周面と対向するようにして配置される。なお、センサ筐体１０８内には、図示しない、速度センサ、温度センサ、加速度センサが含まれている。   For example, as shown in FIG. 3, in the sensor-equipped bearing device 100 described in Patent Document 1, a double-row tapered roller for rotatably supporting an axle 101 on which a wheel (not shown) is fixed with respect to an axle box 102. A bearing 103 is disposed between the axle 101 and the axle box 102. An end cap 105 to which a speed detection ring 104 is attached is fixed to the shaft end of the axle 101, and a sensor 107 bolted to the cover 106 of the axle box 102 is connected to the outer periphery of the speed detection ring 104. Arranged to face the surface. The sensor housing 108 includes a speed sensor, a temperature sensor, and an acceleration sensor (not shown).

特表２００１−５００５９７号公報Special table 2001-500707 gazette

しかしながら、上記特許文献１のセンサ付軸受装置１００では、速度を検出できると共に、軸受の温度を検出可能であるが、センサ１０７が軸箱１０２に固定されたカバー１０６に取り付けられるため、軸受１０３との距離が遠くなり、軸受１０３の正確な軸受温度を検出することは困難であった。   However, in the sensor-equipped bearing device 100 of Patent Document 1 described above, the speed can be detected and the temperature of the bearing can be detected. However, since the sensor 107 is attached to the cover 106 fixed to the axle box 102, Thus, it is difficult to detect the accurate bearing temperature of the bearing 103.

本発明は、上述した事情に鑑みてなされたものであり、その目的は、軸受とセンサとの距離が遠くても、軸受温度を正確に検出することができるセンサ付軸受装置を提供することにある。   The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a sensor-equipped bearing device that can accurately detect a bearing temperature even when the distance between the bearing and the sensor is long. is there.

（１） 軸受の運転状態を検知するセンサを備えたセンサ付軸受装置であって、センサは、軸受装置の軸箱に取り付けられるセンサ筐体と、センサ筐体に配設される温度検出部と、を有し、センサ筐体は、軸箱の外周面に取り付けられると共に、センサ筐体と軸箱との間に熱伝導性部材を配設することを特徴とするセンサ付軸受装置。
（２） 熱伝導性部材は、シリコン樹脂であることを特徴とする（１）に記載のセンサ付軸受装置。
（３） 熱伝導性部材は、シリコン樹脂に熱伝導物質を添加したものであることを特徴とする（２）に記載のセンサ付軸受装置。
（４） 熱伝導性部材は、発泡金属であることを特徴とする（１）に記載のセンサ付軸受装置。
（５） センサ筐体の軸箱への取付面が突出していることを特徴とする（１）〜（４）のいずれかに記載のセンサ付軸受装置。
（６） センサは、センサ筐体に配設される振動検出部をさらに有することを特徴とする（１）〜（５）のいずれかに記載のセンサ付軸受装置。 (1) A sensor-equipped bearing device including a sensor for detecting an operation state of the bearing, wherein the sensor includes a sensor housing attached to a shaft box of the bearing device, and a temperature detection unit disposed in the sensor housing. The sensor housing is attached to the outer peripheral surface of the axle box, and a heat conductive member is disposed between the sensor casing and the axle box.
(2) The sensor-equipped bearing device according to (1), wherein the heat conductive member is a silicon resin.
(3) The sensor-equipped bearing device according to (2), wherein the heat conductive member is obtained by adding a heat conductive material to silicon resin.
(4) The sensor-equipped bearing device according to (1), wherein the thermally conductive member is a foam metal.
(5) The sensor-equipped bearing device according to any one of (1) to (4), wherein a mounting surface of the sensor housing to the axle box protrudes.
(6) The sensor-equipped bearing device according to any one of (1) to (5), wherein the sensor further includes a vibration detection unit disposed in the sensor housing.

本発明のセンサ付軸受装置によれば、センサ筐体は、軸箱の外周面に取り付けられると共に、センサ筐体と軸箱との間に熱伝導性部材を配設するため、センサ筐体と軸箱との有効接触面積が広くなり、軸受とセンサとの距離が遠くても、軸受温度を正確に検出することができる。これにより、軸受の異常を精度良く検知して軸受装置の信頼性を向上することができる。   According to the bearing device with a sensor of the present invention, the sensor casing is attached to the outer peripheral surface of the axle box, and the heat conductive member is disposed between the sensor casing and the axle box. The effective contact area with the axle box is increased, and the bearing temperature can be accurately detected even when the distance between the bearing and the sensor is long. Thereby, the abnormality of a bearing can be detected accurately and the reliability of a bearing apparatus can be improved.

以下、本発明に係るセンサ付軸受装置の一実施形態について図面を参照して詳細に説明する。   Hereinafter, an embodiment of a bearing device with a sensor according to the present invention will be described in detail with reference to the drawings.

図１は本発明に係るセンサ付軸受装置の一実施形態を説明するための一部切欠正面図、図２は図１に示すセンサ付軸受装置の要部拡大断面図である。   FIG. 1 is a partially cutaway front view for explaining an embodiment of a sensor-equipped bearing device according to the present invention, and FIG. 2 is an enlarged sectional view of a main part of the sensor-equipped bearing device shown in FIG.

本実施形態のセンサ付軸受装置１０は、図１に示すように、鉄道車両用軸受装置であり、図示しない車輪を固定した車軸１１を、不図示の台車に装備された軸箱１２に対して回転自在に支持するための軸受１３が、車軸１１と軸箱１２との間に配置されている。   As shown in FIG. 1, the sensor-equipped bearing device 10 according to the present embodiment is a railway vehicle bearing device, and an axle 11 having a wheel (not shown) fixed thereto is connected to an axle box 12 mounted on a cart (not shown). A bearing 13 for rotatably supporting is arranged between the axle 11 and the axle box 12.

軸受１３には、種々の部材の重量等によるラジアル荷重と任意のアキシアル荷重とが負荷される。なお、軸受１３は、複列円すいころ軸受、複列の深溝玉軸受、アンギュラ玉軸受、円筒ころ軸受や、単列の転がり軸受を組み合わせたもの等、公知の各種転がり軸受を使用することができ、転がり軸受の具体構成は図示省略する。   The bearing 13 is loaded with a radial load and an arbitrary axial load due to the weight of various members. The bearing 13 may be a variety of known rolling bearings such as a double row tapered roller bearing, a double row deep groove ball bearing, an angular ball bearing, a cylindrical roller bearing, or a combination of a single row rolling bearing. The specific configuration of the rolling bearing is not shown.

そして、軸受１３の負荷圏側に位置する、即ち、車軸１１の中心０を通過する水平面Ｐより上方に位置する軸箱１２の外周側部に、センサ１４が取り付けられている。   And the sensor 14 is attached to the outer peripheral side part of the axle box 12 located in the load zone side of the bearing 13, ie, located above the horizontal surface P which passes through the center 0 of the axle 11.

センサ１４は、アルミニウム合金製の軸箱１２と同一材料からなるセンサ筐体１５と、センサ筐体１５の底部に配置される基板取り付け部１５ａと、基板取り付け部１５ａ上に取り付けられるプリント基板１７と、プリント基板１７の裏面（軸箱１２側）に実装される温度検出部としてのサーミスタや温度ＩＣ等の温度検出素子１８と、プリント基板１７の上面に実装されていて軸受１３の振動を測定する振動検出部としての振動検出素子１９と、温度検出素子１８と振動検出素子１９とから出力される測定信号を外部に伝送するため、センサ筐体１５に取り付けられるケーブルグランド２０から外部へ引き出される信号ケーブル２１と、を備える。   The sensor 14 includes a sensor housing 15 made of the same material as the aluminum alloy axle box 12, a substrate mounting portion 15a disposed at the bottom of the sensor housing 15, and a printed circuit board 17 mounted on the substrate mounting portion 15a. A temperature detection element 18 such as a thermistor or a temperature IC mounted on the back surface (axle box 12 side) of the printed circuit board 17 and a vibration detection of the bearing 13 mounted on the upper surface of the printed circuit board 17 are measured. In order to transmit the measurement signal output from the vibration detection element 19 as the vibration detection unit, the temperature detection element 18 and the vibration detection element 19 to the outside, a signal drawn out from the cable gland 20 attached to the sensor housing 15 Cable 21.

センサ筐体１５は、断面長方形の箱状体に形成されるもので、プリント基板１７を取り付ける基板取り付け部１５ａと、基板取り付け部１５ａから軸箱１２に向けて突出形成される取付部１５ｂと、基板取り付け部１５ａを囲繞するように形成される周壁１５ｃと、周壁１５ｃの上部開口を閉塞するカバー部材１５ｄと、を有する。また、センサ筐体１５には、信号ケーブル２１を取り出すための不図示の取り出し孔が形成されており、ケーブルグランド２０は、信号ケーブル２１を基板取り付け部１５ａから引き出すように、周壁１５ｃに取り付けられる。なお、カバー部材１５ｄは、ねじ２７によって周壁１５ｃの開口端部にねじ締結される。   The sensor housing 15 is formed in a box-shaped body having a rectangular cross section, and includes a board mounting portion 15a for mounting the printed circuit board 17, a mounting portion 15b formed to project from the board mounting portion 15a toward the axle box 12, The peripheral wall 15c is formed so as to surround the board attachment portion 15a, and the cover member 15d closes the upper opening of the peripheral wall 15c. The sensor housing 15 is formed with a take-out hole (not shown) for taking out the signal cable 21, and the cable gland 20 is attached to the peripheral wall 15c so as to pull out the signal cable 21 from the board attaching portion 15a. . The cover member 15d is screwed to the opening end portion of the peripheral wall 15c by a screw 27.

基板取り付け部１５ａは、平面視長方形状に形成されており、その上面にプリント基板１７を固定している。また、基板取り付け部１５ａの中央部には、軸箱１２に向けて凹部２２が形成されており、この凹部２２に、プリント基板１７の裏面に実装された温度検出素子１８が嵌め込まれるように配置される。さらに、温度検出素子１８と凹部２２との間に形成される隙間には、熱伝導性部材２３が充填されている。なお、プリント基板１７上には、温度検出素子１８、振動検出素子１９の他に、信号増幅用のアンプや抵抗、コンデンサ等の電子部品が実装されている。   The board attaching portion 15a is formed in a rectangular shape in plan view, and the printed board 17 is fixed on the upper surface thereof. Further, a concave portion 22 is formed in the central portion of the board mounting portion 15a toward the axle box 12, and the temperature detecting element 18 mounted on the back surface of the printed circuit board 17 is fitted into the concave portion 22 so as to be fitted. Is done. Further, a heat conductive member 23 is filled in a gap formed between the temperature detection element 18 and the recess 22. In addition to the temperature detection element 18 and the vibration detection element 19, electronic components such as a signal amplification amplifier, a resistor, and a capacitor are mounted on the printed circuit board 17.

取付部１５ｂは、断面長方形状に形成され、そのコーナー部にはそれぞれボルト挿通孔１５ｅが形成される。そして、取付部１５ｂの軸箱１２側の端面には、基板取り付け部１５ａから軸箱１２に向けて突出する取付面１６が形成されている。   The attachment portion 15b is formed in a rectangular cross section, and a bolt insertion hole 15e is formed at each corner portion. And the attachment surface 16 which protrudes toward the axle box 12 from the board attachment part 15a is formed in the end surface at the side of the axle box 12 of the attachment part 15b.

このように構成されるセンサ１４は、取付部１５ｂの取付面１６を軸箱１２の外周面であるセンサ筐体取付面２４と当接させた状態で、ボルト挿通孔１５ｅを介して軸箱１２にボルト締結される。また、基板取り付け部１５ａの裏面がセンサ筐体取付面２４近傍に配置されるように、センサ筐体１５を軸箱１２に取り付ける。   The sensor 14 configured as described above has the shaft box 12 through the bolt insertion hole 15e in a state where the mounting surface 16 of the mounting portion 15b is in contact with the sensor housing mounting surface 24 which is the outer peripheral surface of the shaft box 12. The bolt is fastened. In addition, the sensor housing 15 is attached to the axle box 12 so that the back surface of the substrate attachment portion 15a is disposed in the vicinity of the sensor housing attachment surface 24.

また、センサ１４は、センサ筐体１５が軸箱１２に取り付けられた状態において、基板取り付け部１５ａの裏面をセンサ筐体取付面２４に密着させることは加工精度の点からコスト高になり易いため、基板取り付け部１５ａの裏面をセンサ筐体取付面２４と所定の隙間を存して取り付けている。そして、この基板取り付け部１５ａとセンサ筐体取付面２４との隙間、即ち、センサ筐体１５の基板取り付け部１５ａ及び取付部１５ｂと、軸箱１２のセンサ筐体取付面２４と、により形成される空間部２５には、熱伝導性部材２６が配設されている。   Further, in the sensor 14, in the state where the sensor housing 15 is attached to the axle box 12, it is easy to increase the cost from the viewpoint of processing accuracy to bring the back surface of the substrate attachment portion 15 a into close contact with the sensor housing attachment surface 24. The back surface of the substrate attachment portion 15a is attached to the sensor housing attachment surface 24 with a predetermined gap. A gap between the substrate mounting portion 15a and the sensor housing mounting surface 24, that is, the substrate mounting portion 15a and the mounting portion 15b of the sensor housing 15 and the sensor housing mounting surface 24 of the axle box 12 is formed. A heat conductive member 26 is disposed in the space portion 25.

熱伝導性部材２３，２６は、シリコン樹脂のように熱伝導性を有し、取付時にセンサ筐体１５と軸箱１２とが密着するように適度な弾性を有することが望ましく、シリコン樹脂単体でも良いが、シリコン樹脂に熱伝導物質を添加したもので、例えば、シリコン樹脂にシリカ等の粉末や金属粉等の熱伝導物質を添加したものを使用することにより、熱伝導率を高くしてさらに熱伝導性能を向上させることができる。また、熱伝導性部材２６として発泡金属を使用してもよい。発泡金属としては、例えば、内部に多数の孔を有する銅合金、ステンレス鋼、アルミニウム合金等が挙げられる。さらに、熱伝導性部材２６は、空間部２５に直接充填してもよいが、板状の熱伝導性部材を基板取り付け部１５ａの裏面に接着等の接合手段でもって取り付けておけば取り扱いが容易になるので好ましい。   The heat conductive members 23 and 26 have heat conductivity such as silicon resin, and desirably have appropriate elasticity so that the sensor housing 15 and the axle box 12 are in close contact with each other. Although it is good, the heat conductivity is added to the silicon resin. For example, by using the silicon resin with the addition of the heat conduction material such as silica powder or metal powder, the thermal conductivity is further increased. Heat conduction performance can be improved. A metal foam may be used as the heat conductive member 26. Examples of the foam metal include a copper alloy having a large number of holes inside, a stainless steel, and an aluminum alloy. Furthermore, the heat conductive member 26 may be directly filled into the space 25, but if a plate-like heat conductive member is attached to the back surface of the substrate attachment portion 15a by a bonding means such as adhesion, it is easy to handle. This is preferable.

このように構成されるセンサ付軸受装置１０では、空間部２５に収納された熱伝導性部材２６が、基板取り付け部１５ａの裏面と、センサ筐体取付面２４とに密着するため、センサ筐体１５と軸箱１２との有効接触面積が広くなり、軸受１３の温度は、軸箱１２から熱伝導性部材２６を介して温度検出素子１８に効率よく伝達され、検出される。これにより、温度検出素子１８は正確な軸受温度を検出することができる。   In the sensor-equipped bearing device 10 configured as described above, the heat conductive member 26 housed in the space portion 25 is in close contact with the back surface of the substrate mounting portion 15a and the sensor housing mounting surface 24. The effective contact area between the shaft box 12 and the axle box 12 is increased, and the temperature of the bearing 13 is efficiently transmitted from the axle box 12 to the temperature detecting element 18 via the heat conductive member 26 and detected. Thereby, the temperature detection element 18 can detect an accurate bearing temperature.

従って、本実施形態のセンサ付軸受装置１０によれば、センサ筐体１５は、軸箱１２のセンサ筐体取付面２４に取り付けられると共に、センサ筐体１５と軸箱１２との間に熱伝導性部材２６を配設するため、センサ筐体１５の取付部１５ｂに加え、熱伝導性部材２６を介して熱が伝わるので、有効接触面積が広くなり、軸受温度を効率良く温度検出素子１８に伝達することができるので、軸受１３とセンサ１４との距離が遠くても、温度検出素子１８が軸受温度を正確に検出することができる。これにより、軸受１３の異常を精度良く検知することで軸受装置１０の信頼性を向上することができる。   Therefore, according to the sensor-equipped bearing device 10 of the present embodiment, the sensor casing 15 is attached to the sensor casing mounting surface 24 of the axle box 12 and heat conduction is performed between the sensor casing 15 and the axle box 12. Since the heat conductive member 26 is provided and heat is transmitted through the heat conductive member 26 in addition to the mounting portion 15b of the sensor housing 15, the effective contact area is widened, and the bearing temperature is efficiently transferred to the temperature detecting element 18. Therefore, even if the distance between the bearing 13 and the sensor 14 is long, the temperature detecting element 18 can accurately detect the bearing temperature. Thereby, the reliability of the bearing device 10 can be improved by accurately detecting the abnormality of the bearing 13.

また、本実施形態のセンサ付軸受装置１０によれば、取付部１５ｂに基板取り付け部１５ａから軸箱１２に向けて突出する取付面１６を形成するため、基板取り付け部１５ａとセンサ筐体取付面２４との間に空間部２５を形成することができ、この空間部２５に熱伝導性部材２６を配設することができる。これにより、熱伝導性部材２６を介して軸受温度を効率良く温度検出素子１８に伝達することができる。   Further, according to the sensor-equipped bearing device 10 of the present embodiment, since the mounting surface 16 that protrudes from the substrate mounting portion 15a toward the axle box 12 is formed on the mounting portion 15b, the substrate mounting portion 15a and the sensor housing mounting surface are formed. A space 25 can be formed between the space 24 and the heat conductive member 26 can be disposed in the space 25. As a result, the bearing temperature can be efficiently transmitted to the temperature detection element 18 via the heat conductive member 26.

また、本実施形態のセンサ付軸受装置１０によれば、取付部１５ｂに基板取り付け部１５ａから軸箱１２に向けて突出する取付面１６を形成するため、軸箱１２のように鋳物の肌のままで精度が出ていない表面であっても、センサ１４を軸箱１２に有効接触面積を広く確保した状態で容易に取り付けることができる。   Further, according to the sensor-equipped bearing device 10 of the present embodiment, the mounting surface 16 that protrudes from the board mounting portion 15a toward the axle box 12 is formed on the attachment portion 15b. The sensor 14 can be easily attached to the axle box 12 in a state in which an effective contact area is secured widely even on a surface that is not accurate.

また、本実施形態のセンサ付軸受装置１０によれば、温度検出素子１８を基板取り付け部１５ａの凹部２２に嵌め込むように配置し、さらに、温度検出素子１８と凹部２２との間に熱伝導性部材２３を充填するため、温度検出素子１８が軸受温度をより正確に検出することができる。   Further, according to the sensor-equipped bearing device 10 of the present embodiment, the temperature detection element 18 is disposed so as to be fitted into the concave portion 22 of the substrate mounting portion 15 a, and further, heat conduction is performed between the temperature detection element 18 and the concave portion 22. Since the conductive member 23 is filled, the temperature detecting element 18 can detect the bearing temperature more accurately.

また、本実施形態のセンサ付軸受装置１０によれば、振動検出素子１９をプリント基板１７の上面側に取り付けているため、裏面側に取り付けた温度検出素子１８に軸受温度が伝わり易くなるので、温度検出素子１８が軸受温度をより正確に検出することができる。   Further, according to the sensor-equipped bearing device 10 of the present embodiment, since the vibration detection element 19 is attached to the upper surface side of the printed circuit board 17, the bearing temperature is easily transmitted to the temperature detection element 18 attached to the back surface side. The temperature detecting element 18 can detect the bearing temperature more accurately.

また、本実施形態のセンサ付軸受装置１０によれば、センサ１４を軸箱１２の外周面に取り付けるため、センサ筐体１５を軸箱１２に収納できない場合においても、簡単にセンサ１４を軸箱１２に配置することができる。   Further, according to the sensor-equipped bearing device 10 of the present embodiment, since the sensor 14 is attached to the outer peripheral surface of the axle box 12, even when the sensor housing 15 cannot be accommodated in the axle box 12, the sensor 14 is easily attached to the axle box. 12 can be arranged.

また、本実施形態のセンサ付軸受装置１０によれば、熱伝導性部材２６にシリコン樹脂単体、あるいはシリコン樹脂にシリカ等の粉末や金属粉等の熱伝導物質を添加したものを使用するため、軸受１３の軸受温度を温度検出素子１８に効率良く伝達することができる。   In addition, according to the sensor-equipped bearing device 10 of the present embodiment, since the heat conductive member 26 is made of a silicon resin alone, or a silicon resin added with a heat conductive material such as silica powder or metal powder, The bearing temperature of the bearing 13 can be efficiently transmitted to the temperature detecting element 18.

また、本実施形態のセンサ付軸受装置１０によれば、熱伝導性部材２６に内部に多数の孔を有する銅合金、ステンレス鋼、アルミニウム合金等の発泡金属を使用するため、熱伝導係数が大きく、適度な弾性があるので、軸受１３の軸受温度を温度検出素子１８に効率良く伝達することができる。   Further, according to the sensor-equipped bearing device 10 of the present embodiment, the heat conductive member 26 is made of foam metal such as copper alloy, stainless steel, aluminum alloy or the like having a large number of holes therein, so that the heat conduction coefficient is large. Since there is appropriate elasticity, the bearing temperature of the bearing 13 can be efficiently transmitted to the temperature detecting element 18.

また、本実施形態のセンサ付軸受装置１０によれば、温度検出素子１８と振動検出素子１９とを有するため、軸受１３の軸受温度の検出に加えて、軸受１３の振動も検出することができるので、異常振動等による車両不具合を未然に検知することができる。   Further, according to the sensor-equipped bearing device 10 of the present embodiment, since the temperature detecting element 18 and the vibration detecting element 19 are provided, the vibration of the bearing 13 can be detected in addition to the detection of the bearing temperature of the bearing 13. Therefore, it is possible to detect a vehicle malfunction due to abnormal vibration or the like.

また、本実施形態のセンサ付軸受装置１０によれば、センサ１４は、センサ筐体１５を単一の部品とし、プリント基板１７を取り付け後にカバー部材１５ｄを取り付ける構造としているために、部品点数を低減できると共に、組立性を向上することができる。   Further, according to the sensor-equipped bearing device 10 of the present embodiment, the sensor 14 has a structure in which the sensor housing 15 is a single component and the cover member 15d is attached after the printed circuit board 17 is attached. It can be reduced and the assemblability can be improved.

なお、本発明は、前述した実施形態に限定されるものではなく、適宜、変形、改良等が可能である。
例えば、基板取り付け部は、カバー部材を取り付けることで断面略長方形状に形成されるが、これに限定されずに、円形状や半円形状であってもよい。
また、センサの取り付け位置は、本実施形態のように、軸受外輪の軸方向長さ内に取り付けることが好ましく、外輪の軌道面の軸方向中央に取り付けることで、軸受温度をより正確に測定でき、好ましい。
また、センサ筐体の取付面に、その周縁に沿った樹脂製リングを取り付けてもよく、この取付面に防水用のシリコン樹脂等を塗布することで、防水性を向上することができる。
また、軸箱の材質は、アルミニウム合金に限定されるものではなく、鉄製であってもよい。また、センサ筐体の材質もアルミニウム合金に限定されず、ステンレス鋼等であってもよい。しかしながら、アルミニウム合金製のセンサ筐体の方が、熱伝導性が良いので好ましい。
また、本実施形態では、センサ付軸受装置として、鉄道車両用軸受装置を例示したが、これに限定されず、自動車用軸受装置にも適用可能である。
さらに、センサの取り付け部は、負荷圏側の方が温度検知性能上好ましいが、ケーブルの取り回し等により非負荷圏側に設けてもよい。 In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably.
For example, the substrate attachment portion is formed in a substantially rectangular cross section by attaching a cover member, but is not limited thereto, and may be circular or semicircular.
Also, the sensor mounting position is preferably mounted within the axial length of the bearing outer ring, as in this embodiment, and the bearing temperature can be measured more accurately by mounting at the center of the outer ring raceway surface in the axial direction. ,preferable.
Further, a resin ring along the periphery of the sensor housing may be attached to the attachment surface of the sensor casing, and waterproofing can be improved by applying a waterproof silicone resin or the like to the attachment surface.
The material of the axle box is not limited to aluminum alloy, and may be made of iron. The material of the sensor housing is not limited to aluminum alloy, and may be stainless steel or the like. However, an aluminum alloy sensor housing is preferred because of its good thermal conductivity.
In the present embodiment, the railway vehicle bearing device is exemplified as the sensor-equipped bearing device.
Further, the sensor mounting portion is preferably on the load zone side in terms of temperature detection performance, but may be provided on the non-load zone side by cable handling or the like.

本発明に係るセンサ付軸受装置の一実施形態を説明するための一部切欠正面図である。It is a partially cutaway front view for demonstrating one Embodiment of the bearing apparatus with a sensor which concerns on this invention. 図１に示すセンサ付軸受装置の要部拡大断面図である。It is a principal part expanded sectional view of the bearing apparatus with a sensor shown in FIG. 従来のセンサ付軸受装置の断面図である。It is sectional drawing of the conventional bearing apparatus with a sensor.

符号の説明Explanation of symbols

１０ センサ付軸受装置
１１ 車軸
１２ 軸箱
１３ 軸受
１４ センサ
１５ センサ筐体
１５ａ 基板取り付け部
１５ｂ 取付部
１５ｃ 周壁
１５ｄ カバー部材
１５ｅ ボルト挿通孔
１６ 取付面
１７ プリント基板
１８ 温度検出素子（温度検出部）
１９ 振動検出素子（振動検出部）
２０ ケーブルグランド
２１ 信号ケーブル
２２ 凹部
２３，２６ 熱伝導性部材
２４ センサ筐体取付面
２５ 空間部
２７ ねじ DESCRIPTION OF SYMBOLS 10 Bearing apparatus with a sensor 11 Axle 12 Shaft box 13 Bearing 14 Sensor 15 Sensor housing 15a Board attachment part 15b Attachment part 15c Perimeter wall 15d Cover member 15e Bolt insertion hole 16 Attachment surface 17 Printed circuit board 18 Temperature detection element (temperature detection part)
19 Vibration detector (vibration detector)
20 Cable gland 21 Signal cable 22 Recess 23, 26 Thermally conductive member 24 Sensor housing mounting surface 25 Space 27 Screw

Claims (6)

軸受の運転状態を検知するセンサを備えたセンサ付軸受装置であって、
前記センサは、前記軸受装置の軸箱に取り付けられるセンサ筐体と、前記センサ筐体に配設される温度検出部と、を有し、
前記センサ筐体は、前記軸箱の外周面に取り付けられると共に、前記センサ筐体と前記軸箱との間に熱伝導性部材を配設することを特徴とするセンサ付軸受装置。 A bearing device with a sensor provided with a sensor for detecting an operation state of the bearing,
The sensor has a sensor housing attached to the axle box of the bearing device, and a temperature detection unit disposed in the sensor housing,
The sensor housing is attached to an outer peripheral surface of the axle box, and a thermally conductive member is disposed between the sensor casing and the axle box. 前記熱伝導性部材は、シリコン樹脂であることを特徴とする請求項１に記載のセンサ付軸受装置。   The sensor-equipped bearing device according to claim 1, wherein the heat conductive member is a silicon resin. 前記熱伝導性部材は、シリコン樹脂に熱伝導物質を添加したものであることを特徴とする請求項２に記載のセンサ付軸受装置。   The sensor-equipped bearing device according to claim 2, wherein the heat conductive member is obtained by adding a heat conductive material to silicon resin. 前記熱伝導性部材は、発泡金属であることを特徴とする請求項１に記載のセンサ付軸受装置。   The sensor-equipped bearing device according to claim 1, wherein the thermally conductive member is a foam metal. 前記センサ筐体の前記軸箱への取付面が突出していることを特徴とする請求項１〜４のいずれかに記載のセンサ付軸受装置。   The sensor-equipped bearing device according to claim 1, wherein a mounting surface of the sensor housing to the axle box protrudes. 前記センサは、前記センサ筐体に配設される振動検出部をさらに有することを特徴とする請求項１〜５のいずれかに記載のセンサ付軸受装置。   The sensor-equipped bearing device according to claim 1, wherein the sensor further includes a vibration detection unit disposed in the sensor housing.
JP2005150009A 2005-05-23 2005-05-23 Bearing device with sensor Pending JP2006329231A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020101269A (en) * 2018-12-25 2020-07-02 株式会社荏原製作所 Rotating machine device
RU209221U1 (en) * 2020-08-26 2022-02-08 Тирсан Кардан Санайи Ве Тиджарет Аноним Ширкети PTO SHAFT SUPPORT WITH TEMPERATURE MEASUREMENT

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020101269A (en) * 2018-12-25 2020-07-02 株式会社荏原製作所 Rotating machine device
JP7216544B2 (en) 2018-12-25 2023-02-01 株式会社荏原製作所 rotating machinery
RU209221U1 (en) * 2020-08-26 2022-02-08 Тирсан Кардан Санайи Ве Тиджарет Аноним Ширкети PTO SHAFT SUPPORT WITH TEMPERATURE MEASUREMENT

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