JP2006194221A - Anti-friction bearing fitment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an anti-friction bearing fitment which realizes space saving and plans to reduce a built-in man power of detecting mechanism. <P>SOLUTION: In the anti-friction bearing fitment, used for a compressor fitment of fuel cell, comprising a pair of anti-friction bearing fitments 4 which bear a rotary shaft 3 to which parts of compressor or the like are fixed, the anti-friction bearing 4 comprises an outer ring of spiral wound gasket 12 in which an outside rolling face 12a is formed in inner periphery, an inner ring of spiral wound gasket 13 in which an inside rolling face 13a is formed in outer periphery, and a plurality of ball 15 accommodated between both rolling faces through retainer 14 in such a manner of freely rolling, and a sensor holder 23, formed in one end of the outer ring of spiral wound gasket 12 in a circle with sheet steel, is attached, furthermore, a detector 26 consisting of synthetic resin is integrally molded to this sensor holder 23, then a sensor 27 is embedded in this detector 26, and a rotating speed of the compressor is made to be detected by attaching a rotary element 22 consisting of a magnetic encoder facing this sensor 27 to the inner ring of spiral wound gasket 13 simultaneously. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a rolling bearing device that supports a rotating shaft to which components such as an impeller compressor are fixed, and more particularly to a rolling bearing device used in a compressor device for a fuel cell.

  A fuel cell is a power generation device that takes out electric energy by chemically reacting hydrogen and oxygen supplied from the outside, and is a solid that is generally applied to, for example, a fuel cell for an automobile by an electrolyte used in the fuel cell. It is classified into a polymer type, a phosphate electrolyte type, a molten carbonate type, and a solid oxide type. Regardless of the type of fuel cell, both sides of the electrolyte or electrolyte membrane are sandwiched between both cathode (oxygen electrode) and anode (fuel electrode) electrodes, and oxygen in the air is supplied as the oxidant gas to the cathode side. At the same time, a unit cell in which hydrogen is supplied as fuel gas to the anode side is formed as a single cell, and each cell through separators is stacked to form a stack.

  There are a turbocharger system in which the compressor is driven by an exhaust gas turbine and a motor drive system in which the compressor is driven by a motor in order to supply air by pumping to the cathode side of such a fuel cell. Further, when supplying oxygen and hydrogen to the fuel cell, for example, in the case of a solid polymer type or the like, it is necessary to react by adding water vapor even in a direct hydrogen type that uses hydrogen directly as a fuel. Furthermore, for example, in a reformed fuel type using gasoline or the like as the fuel, very high temperature steam is required. Since water vapor is required in this way, a compressor that pumps water vapor is generally used for the purpose of increasing energy efficiency.

  FIG. 4 shows the overall configuration of a direct hydrogen type system that uses direct hydrogen as a fuel cell. The fuel cell stack 51 has a structure in which a fuel electrode 52 and an oxidant electrode 53 are arranged to face each other with a solid polymer electrolyte membrane interposed therebetween, and are further sandwiched by separators, and a plurality of layers are stacked. Further, the humidifier 54 humidifies the fuel gas and the oxidant gas when the fuel gas and the oxidant gas are adjacent to the pure water through the semipermeable membrane and the water molecules pass through the semipermeable membrane. Is going.

  Hydrogen is stored in the hydrogen tank 55, and this hydrogen is regulated by the fuel pressure regulating valve 56, and then passes through the ejector pressure feeder 57, the supply side water separator 58, and the humidifier 54, and to the fuel cell stack 51. It is supplied from the fuel inlet 52 a of the fuel electrode 52. The mixed gas of hydrogen and water vapor discharged from the fuel outlet 52 b of the fuel electrode 52 passes through the discharge-side water separator 59 and the flow path shutoff valve 60 and is mixed with the raw fuel gas by the ejector pump 57. This mixed gas is circulated to the fuel electrode 52 of the fuel cell stack 51 through the supply side water separator 58 and the humidifier 54.

  Further, a purge pipe 63 that is purged with hydrogen at the purge branching part 62 is branchedly connected to the pipe 61 between the discharge side water separator 59 and the flow path cutoff valve 60, and the purge gas cutoff valve 64 is connected to the purge pipe 63. And a purge gas catalyst 65 are provided.

  The air as the oxidant is supplied from the oxidant inlet 53a to the oxidant electrode 53 of the fuel cell stack 51 through the humidifier 54 by the pressure feeder 66. Exhaust gas discharged from the oxidant outlet 53 b of the oxidant electrode 53 contains water vapor and liquid water, and liquid water is separated by the water separator 67. The water separator 67 is provided with an air purge pipe 68 and a purge gas shut-off valve 69 for supplying air at the time of hydrogen purge. Air is supplied to the purge gas catalyst 65 and discharged outside during the hydrogen purge. An air exhaust pipe 70 is branched and connected to the air purge pipe 68, and an air pressure regulating valve 71 is provided in the air exhaust pipe 70.

  Further, the power generation state of the fuel cell stack 51 is detected by a sensor (not shown), and feedback is received so that the hydrogen pressure and the air pressure are adjusted by the fuel pressure regulating valve 56 and the air pressure regulating valve 71 according to the power generation state in response to this detection signal. In addition to being controlled, feedback control is performed so that the air flow rate is adjusted by the rotational speed of the pressure feeder 66.

  Further, in such a fuel cell system, it is necessary to send vaporized fuel, fuel gas, high-temperature fuel or compressed air between the devices, and various pressure feeders such as a pressure feed pump and a turbocharger are used. These pumps often incorporate a bearing.

  For example, FIG. 5 is a cross-sectional view showing an example of a rolling bearing device used in such a pressure feeder. The rolling bearing device 80 includes a housing 81 and a rotary shaft 82 fitted in the housing 81. And a pair of rolling bearings 83 and 83 that rotatably support the rotary shaft 82 with respect to the housing 81.

  One end portion of the rotary shaft 82 protrudes from one rolling bearing 83, and an impeller 84 is attached to the tip end side thereof. A seal portion is provided between the back surface of the impeller 84 and the rolling bearing 83. The seal portion is disposed between a bush 85 externally attached to the rotary shaft 82, a sealing member 86 mounted in a groove formed on the outer peripheral surface of the bush 85, and the back plate 87 and the rolling bearing 83. Baffle 88. Here, the sealing member 86 seals a gap between the outer peripheral surface of the bush 85 and the inner peripheral surface of the back plate 87. The end of the bush 85 is in contact with the side surface of the inner ring 84 of the rolling bearing 83.

In this rolling bearing device 80, the impeller 84 rotates as the rotary shaft 82 rotates at high speed, and the water vapor sucked from the water vapor suction port 89 is pressurized by the impeller 84, and is formed by the impeller housing 90 and the back plate 87. The water is discharged from the water vapor outlet 92 through the pressure volute 91.
JP 2004-47473 A

  In such a conventional fuel cell system, the power generation state of the fuel cell stack 51 is detected by a sensor, and the hydrogen pressure and the air pressure are adjusted by the fuel pressure regulating valve 56 and the air pressure regulating valve 71 according to the power generation state in response to this detection signal. Although the feedback control is performed so that the air flow rate is adjusted by the rotation speed of the pressure feeder 66, the rotation speed of the pressure feeder (compressor) 66 is detected and abnormal heat is generated during power generation. It is necessary to separately provide a detection / adjustment mechanism for detection or detection / adjustment of the fuel mixture ratio. In addition, power supply equipment for driving these detection mechanisms is required, which not only complicates the system itself, but also increases the number of assembling steps and adjustment steps, thereby saving space and reducing costs. It was an impediment.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a rolling bearing device that realizes space saving and reduces the number of assembling steps of a detection mechanism.

  In order to achieve the object, the invention according to claim 1 of the present invention is a rolling bearing device used in a compressor device of a fuel cell, and is a cylindrical housing, and is fitted into the housing, and the compressor device is In a rolling bearing device comprising: a rotating shaft to which the components are fixed; and a rolling bearing that is interposed between the rotating shaft and the housing and rotatably supports the rotating shaft with respect to the housing. The rolling bearing includes an outer ring having an outer rolling surface formed on the inner periphery, an inner ring having an inner rolling surface opposed to the outer rolling surface on the outer periphery, and a cage between both rolling surfaces. A plurality of rolling elements accommodated in a freely rolling manner, a sensor provided at one end of the outer ring, and a rotating element mounted on the inner ring opposite to the sensor, the operating state of the compressor device being Sen It was to be detected by.

  Thus, a rolling bearing device used in a compressor device of a fuel cell, which is a cylindrical housing, a rotary shaft that is fitted into the housing and to which components of the compressor device are fixed, the rotary shaft and the housing, In a rolling bearing device having a rolling bearing that is interposed between the rolling bearing and rotatably supports the rotating shaft with respect to the housing, the rolling bearing has an outer ring having an outer rolling surface formed on the inner circumference, and an outer circumference. An inner ring formed with an inner rolling surface, a plurality of rolling elements accommodated between the rolling surfaces via a cage, a sensor provided at one end of the outer ring, and a sensor Rolling bearing device that has a rotating element mounted on the inner ring and that detects the operating state of the compressor device by means of a sensor, thus saving space and reducing the number of assembly steps for the detection mechanism It is possible to provide.

  According to a second aspect of the present invention, a sensor holder formed in an annular shape by pressing a steel plate is attached to one end portion of the outer ring, and a detection portion made of synthetic resin is integrally molded on the sensor holder. Since the sensor is embedded in the detection unit, it is possible to simplify the power supply circuit, the periphery of the wiring, and the surroundings, thereby improving the reliability.

  According to a third aspect of the invention, the rotating element comprises a magnetic encoder in which magnetic powder is mixed in an elastomer and magnetic poles N and S are alternately magnetized in the circumferential direction, and the outer ring is arranged outside the inner ring. Since it is integrally joined to the core metal fitted to the diameter surface, the rotation speed of the compressor can be detected without installing a separate detection mechanism, and the air flow rate of the compressor is adjusted based on this detection signal. Feedback control.

  Further, as in the invention described in claim 4, if a seal that is in sliding contact with the inner ring is attached to the other end of the outer ring, and a seal is disposed between the sensor and the rolling element. Further, it is possible to prevent foreign matters such as water vapor from entering the inside of the bearing from the outside, and it is possible to prevent malfunction of the sensor due to grease leaking from the rolling element side.

  Further, if the sensor includes a temperature sensor for detecting the ambient temperature of the rolling bearing as in the invention described in claim 5, it is possible to prevent a decrease in grease life due to a high temperature and the durability of the rolling bearing. In addition to improving the performance of the fuel cell, abnormal heat generation during power generation of the fuel cell can be detected, and a plurality of factors required for the compressor device for the fuel cell can be managed.

  A rolling bearing device according to the present invention is a rolling bearing device used in a compressor device for a fuel cell, and includes a cylindrical housing, a rotary shaft that is fitted in the housing, and to which the components of the compressor device are fixed, In a rolling bearing device including a rolling bearing interposed between the rotating shaft and the housing and rotatably supporting the rotating shaft with respect to the housing, the rolling bearing has an outer rolling on the inner periphery. An outer ring having a surface formed therein, an inner ring having an inner ring surface facing the outer rolling surface on the outer periphery, and a plurality of rolling elements accommodated between the both rolling surfaces via a cage. A moving body, a sensor provided at one end portion of the outer ring, and a rotating element mounted on the inner ring facing the sensor and detecting the operation state of the compressor device by the sensor In, it is possible to achieve space saving, provides a rolling bearing device which aimed to reduce the built-steps of the detection mechanism.

  A rolling bearing device used in a compressor device of a fuel cell, which is a cylindrical housing, a rotary shaft that is fitted in the housing and to which the components of the compressor device are fixed, and between the rotary shaft and the housing A rolling bearing device including a rolling bearing that rotatably supports the rotating shaft with respect to the housing, wherein the rolling bearing includes an outer ring having an outer rolling surface formed on an inner circumference, and an outer circumference. An inner ring formed with an inner rolling surface facing the outer rolling surface, and a plurality of rolling elements accommodated between the rolling surfaces via a cage so as to freely roll, and one end of the outer ring. A sensor holder that is formed into an annular shape by pressing a steel plate is attached to the part, and a detection part made of synthetic resin is integrally molded in the sensor holder, and the sensor is embedded in the detection part. The rotational speed of the compressor and configured to detect by the sensor rotation element consisting of a magnetic encoder that faces the sensor attached to the inner ring.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a longitudinal sectional view showing an embodiment of a rolling bearing device according to the present invention, and FIG. 2 is an enlarged view of a main part showing a bearing portion of FIG. In addition, the same code | symbol is attached | subjected to the same component and the same site | part, and the overlapping description is abbreviate | omitted.

  The rolling bearing device 1 includes a housing 2, a rotating shaft 3 fitted into the housing 2, and a pair of rolling bearings 4 and 5 that rotatably support the rotating shaft 3 with respect to the housing 2. .

  One end of the rotating shaft 3 protrudes from one rolling bearing 5, and an impeller 7 is attached to the tip end side via a fixing nut 6. A small-diameter portion 2 a is formed on the inner periphery of the housing 2, and faces the shoulder portion 3 a of the rotating shaft 3 through a slight radial clearance to form a so-called labyrinth seal 8. The labyrinth seal 8 closes the back surface 7 a of the impeller 7 and the rolling bearing 5. A lid member 19 is attached to the housing 2. A shaft seal 19a slidably contacting the rotary shaft 3 is attached to the inner periphery of the lid member 19, and the opening of the housing 2 is closed.

  In this rolling bearing device 1, the impeller 7 rotates as the rotary shaft 3 rotates at high speed, and the water vapor sucked from the water vapor suction port 9 is pressurized by the impeller 7, and is formed by the impeller housing 10 and the housing 2. It is pumped through the pressure volute 11.

  Here, the pair of rolling bearings 4 and 5 are deep groove ball bearings, and as shown in an enlarged view in FIG. 2, outer rings 12 and 12 ′ having an outer rolling surface 12a formed on the inner periphery and inner rolling on the outer periphery. Inner rings 13 and 13 'formed with a running surface 13a, and rolling elements (balls) 15 and 15 accommodated between the rolling surfaces 12a and 13a via the cages 14 and 14 so as to roll freely. Yes. An inner ring contact type seal 16 is attached to one end portion of the outer ring 12 of the rolling bearing 4, and a rotational speed detection device 21, which will be described later, is attached to the other end portion. The lubricating grease sealed inside the bearing is prevented from leaking to the outside, and foreign matter such as water vapor is prevented from entering the bearing from the outside. On the other hand, seals 16 and 16 are attached to both ends of the outer ring 12 ′ of the rolling bearing 5 to prevent the lubricating grease sealed inside the bearing from leaking to the outside, and foreign matters such as water vapor from the outside are inside the bearing. To prevent intrusion.

  Further, spacers 17 and 18 are mounted between the outer rings 12 and 12 'and between the inner rings 13 and 13', and the pair of rolling bearings 4 and 5 are positioned. That is, the outer rings 12 and 12 ′ are positioned and fixed in the axial direction while being sandwiched between the spacer 17, the housing 2 and the lid member 19, and the inner rings 13 and 13 ′ are fixed to the shoulder 18 and the shoulder of the rotary shaft 3. It is positioned and fixed while being sandwiched between the portion 3a and the fixing nut 20. The pair of rolling bearings 4 and 5 may be angular ball bearings, and preload may be applied to the rolling bearings 4 and 5 by the spacers 17 and 18. Thereby, the shake of the rotating shaft 3 can be suppressed and the rigidity of the rolling bearing device 1 can be improved.

  The seal 16 in the present embodiment is formed of polyacryl rubber, fluorine rubber, or ethylene / propylene rubber (EPDM) having excellent heat resistance and chemical resistance. Among them, ethylene / propylene rubber is a terpolymer of ethylene, propylene, and a diene monomer for crosslinking, and enables sulfur crosslinking (vulcanization) by copolymerizing a third component that is a non-conjugated diene monomer. It is low-cost and has chemical resistance equivalent to polyacrylic rubber. This prevents deterioration and wear of the seal 16 due to organic gas during long-term operation, prevents water vapor from entering the bearing, and further prevents grease from leaking outside the bearing. can do.

  FIG. 3 shows the rolling bearing 4 according to the present embodiment, where (a) is a longitudinal sectional view and (b) is a side view of (a). The rolling bearing 4 is provided with a rotational speed detector 21 at one end of the outer ring 12. The rotational speed detection device 21 includes a rotating element 22 mounted on the outer diameter surface of the inner ring 13 serving as a rotating wheel, and a sensor holder 23 fitted to the inner diameter surface of the outer ring 12 serving as a fixed wheel.

  The rotating element 22 is integrally joined to the outer diameter surface of a cylindrical cored bar 22a fitted to the inner ring 13, and is attached to the outer diameter surface of the inner ring 13 via the cored bar 22a. The rotating element 22 is composed of a magnetic encoder in which magnetic powder is mixed in an elastomer such as rubber and the magnetic poles N and S are alternately magnetized in the circumferential direction. The rotating element 22 is not limited to this, and may be a multi-pole magnetized with a ferromagnetic thin film or the like.

  On the other hand, the sensor holder 23 includes covers 24 and 25 formed by pressing a corrosion-resistant stainless steel plate and the like, and a detection unit 26 held in the covers 24 and 25. In particular, the covers 24 and 25 are formed of a non-magnetic steel plate, for example, an austenitic stainless steel plate (JIS standard SUS304 or the like) so as not to adversely affect the sensing performance of the sensor 27 described later. Is preferred. Further, a claw-like locking piece 24a is bent radially inward at one place in the circumferential direction of the cover 24 and is fitted in a recess 25a formed in the cover 25. It can be prevented from moving out in the axial direction and being displaced in the circumferential direction.

  The detection unit 26 is formed by injection molding synthetic resin, and an electronic circuit component 28 including a sensor 27 and an electronic circuit board is embedded. That is, the sensor 27, the electronic circuit component 28, and the harness 29 connected thereto are integrally molded. This sensor 27 is opposed to the rotating element 22 via a predetermined radial gap (air gap), and magnetic detection such as a Hall element, a magnetoresistive element (MR element), etc., whose characteristics change according to the flow direction of the magnetic flux. It is composed of elements. In addition, the electronic circuit component 28 includes an IC in which a waveform shaping circuit for adjusting the output waveform of the magnetic detection element is incorporated.

  Here, the detection unit 26 is made of a synthetic resin such as a bisphenol A type epoxy resin excellent in chemical resistance and heat resistance, and uses methyl nadic acid anhydride (MNA) as a curing agent. In addition to the above synthetic resins, thermosetting polyimide resins such as phenol resins and bismaleimide polyimide resins, or photocurable resins can be exemplified. Examples of the curing agent include isophoronediamine (IPD), diaminodiphenylmethane (DDM), diaminodiphenylsulfone (DDS), BF monophenylamine, and other imidazoles.

  The sensor 27 detects a magnetic change due to the rotation of the rotating element 22 attached to the inner ring 13 and outputs an output waveform (pulse signal) to measure the rotational speed of the rolling bearing 4, that is, the rotational speed of the rotating shaft 3. It has come to be. This rotational speed detection device 21 can detect the rotational speed of a compressor (not shown) and perform feedback control so as to adjust the air flow rate and the like. Further, since the rotational speed detecting device 21 is built in the rolling bearing 4 that supports the rotating shaft 3, a rolling bearing device that realizes space saving and reduces the number of steps for assembling the detecting mechanism is provided. it can.

  Here, the example in which the rolling bearing 4 includes the rotation speed detection device 21 that detects the rotation speed of the rotating shaft 3 is illustrated, but it is necessary for the detection mechanism required for the fuel cell compressor device, that is, feedback control. By detecting the ambient temperature data in the vicinity of the rolling element 15, outer ring 12, and inner ring 13 that change due to an abnormal detection mechanism, such as abnormal heat generation during power generation, and transmitting it to the control circuit, the grease life is reduced due to high temperatures. Can be monitored and controlled. Various sensors for detecting the mixing ratio of the fuel can be incorporated in the rolling bearing. Therefore, not only can the man-hours for incorporating and adjusting the detection mechanism be reduced, but also the power generated by the fuel cell can be supplied to various sensors, and the power supply circuit, wiring and surroundings can be simplified, Can be improved.

  Reference numeral 30 denotes a shield plate fitted to the inner diameter surface of the cover 24. The steel plate is formed into an annular shape as a whole in a substantially L-shaped section by pressing. The shield plate 30 prevents grease sealed inside the bearing from leaking into the rotational speed detection device 21 to prevent the sensor 27 from malfunctioning, and prevents foreign matter such as water vapor from entering the bearing from the outside. ing. The seal structure is not limited to the non-contact type shield plate 30, but may be a contact type seal having a seal lip that is in sliding contact with the core metal 22 a of the inner ring 13.

  The embodiment of the present invention has been described above, but the present invention is not limited to such an embodiment, and is merely an example, and various modifications can be made without departing from the scope of the present invention. Of course, the scope of the present invention is indicated by the description of the scope of claims, and further, the equivalent meanings described in the scope of claims and all modifications within the scope of the scope of the present invention are included. Including.

  The rolling bearing device according to the present invention is used in a compressor device for a fuel cell, and can be applied to a rolling bearing device that supports a rotating shaft to which components such as a compressor are fixed.

It is a longitudinal section showing one embodiment of a rolling bearing device concerning the present invention. It is a principal part enlarged view which shows the bearing part of FIG. (A) is a longitudinal cross-sectional view which shows embodiment of the rolling bearing which concerns on this invention. (B) is a side view of (a). It is a figure which shows the whole structure of the conventional fuel cell system. It is a longitudinal cross-sectional view which shows the conventional rolling bearing apparatus.

Explanation of symbols

1 ... Rolling bearing device 2 ... Housing 2a ... ·········· Small diameter part 3 ·····································・ ・ ・ ・ ・ ・ Shoulders 4, 5, ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Rolling bearings 6, 20, ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Fixed Nut 7 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Impeller 7a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Back 8 ..... Labyrinth seal 9 ..... Water vapor inlet 10 ...・ ・ ・ ・ ・ ・ Impeller housing 11 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Pressure volute 12, 12 ′ ... outer ring 12a ... outer rolling surface 13, 13 '...・ ・ ・ ・ Inner ring 13a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Inner rolling surface 14 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Retainer 15 ・・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Rolling element 16 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Seal 17, 18 ・ ・ ・ ・ ・ ・ ・ ・・ ・ ・ ・ ・ ・ ・ Spacer 19 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Lid member 19a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Shaft seal 21... Rotation speed detector 22 ... Rotation element 22a・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Core 23 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Sensor holder 24, 25 ・ ・ ・ ・······················ Cover 24a・ Recess 26 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Detector 27 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Sensor 28 ... Electronic circuit components 29 ... Harness 30 ... ...... Shield plate 51 ... ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Fuel cell stack 52 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Fuel electrode 52a ... Fuel inlet 52b ... Fuel outlet 53 ...・ ・ ・ ・ ・ ・ ・ ・ ・ Oxidant electrode 53a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Oxidant inlet 53b ・ ・・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Oxidant outlet 54 ・ ・ ・ ・ ・ ・ Humidifier 55 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Hydrogen tank 56 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Fuel pressure regulating valve 57 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・Ejector pump 58 ... Supply side water separator 59 ... Discharge side water separation 60 ... Flow-off valve 61 ... Piping 62 ... ... Purge branch 63 ... Purge piping 64, 69 ... ... Purge gas shutoff valve 65 ... Purge gas catalyst 66 ...・ ・ ・ ・ ・ ・ ・ ・ Pressure feeder 67 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Water separator 68 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・Air purge pipe 70 ... Air exhaust pipe 71 ... Air pressure regulating valve 80 ... Rolling bearing device 81 ... Housing 82 ...・ ・ ・ ・ ・ ・ ・ ・ ・ Rotating shaft 83 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Rolling bearing 84 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・・ ・ ・ ・ ・ ・ Impeller 85 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Bushing 86 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Sealing member 87 ・..... Back plate 88 ...・ ・ ・ ・ ・ ・ Baffle 89 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Water vapor inlet 90 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Impeller housing 91 ···················· Pressurized volute 92 ···················

Claims (5)

A rolling bearing device used in a compressor device of a fuel cell,
A cylindrical housing, and a rotary shaft that is fitted into the housing and to which the components of the compressor device are fixed;
In a rolling bearing device comprising a rolling bearing interposed between the rotating shaft and the housing and rotatably supporting the rotating shaft with respect to the housing,
The rolling bearing includes an outer ring having an outer rolling surface formed on the inner periphery, an inner ring having an inner rolling surface opposed to the outer rolling surface on the outer periphery, and a cage between both rolling surfaces. A plurality of rolling elements accommodated so as to be freely rollable, a sensor provided at one end of the outer ring, and a rotating element that faces the sensor and is mounted on the inner ring. Is detected by the sensor.   A sensor holder formed in an annular shape by pressing a steel plate is attached to one end of the outer ring, and a detection unit made of synthetic resin is integrally molded in the sensor holder, and the sensor is embedded in the detection unit. The rolling bearing device according to claim 1.   The rotating element is composed of a magnetic encoder in which magnetic powder is mixed in an elastomer and magnetic poles N and S are alternately magnetized in the circumferential direction, and is integrally joined to a core metal fitted to the outer diameter surface of the inner ring. The rolling bearing device according to claim 1 or 2.   The rolling bearing device according to any one of claims 1 to 3, wherein a seal that slides on the inner ring is attached to the other end of the outer ring, and a seal is disposed between the sensor and the rolling element.   The rolling bearing device according to claim 1, wherein the sensor includes a temperature sensor that detects an ambient temperature of the rolling bearing.

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