WO2019134065A1 - Ensemble palier apte à produire de l'électricité et palier apte à produire de l'électricité - Google Patents

Ensemble palier apte à produire de l'électricité et palier apte à produire de l'électricité Download PDF

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Publication number
WO2019134065A1
WO2019134065A1 PCT/CN2018/070007 CN2018070007W WO2019134065A1 WO 2019134065 A1 WO2019134065 A1 WO 2019134065A1 CN 2018070007 W CN2018070007 W CN 2018070007W WO 2019134065 A1 WO2019134065 A1 WO 2019134065A1
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WO
WIPO (PCT)
Prior art keywords
bearing
electrode layer
piezoelectric
layer
generating electricity
Prior art date
Application number
PCT/CN2018/070007
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English (en)
Chinese (zh)
Inventor
关冉
朱干军
Original Assignee
舍弗勒技术股份两合公司
关冉
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 舍弗勒技术股份两合公司, 关冉 filed Critical 舍弗勒技术股份两合公司
Priority to PCT/CN2018/070007 priority Critical patent/WO2019134065A1/fr
Publication of WO2019134065A1 publication Critical patent/WO2019134065A1/fr

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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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
    • H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators

Definitions

  • the present invention relates to the field of bearings, and more particularly to bearing assemblies capable of generating electricity and bearings capable of generating electricity.
  • a huge challenge for bearings with sensors is the power supply of the sensor.
  • the power supply methods of the prior art bearing sensors include external wire power supply, button battery mounted on the bearing, electromagnetic-based small generator integrated in the bearing, and electromagnetic field wireless charging.
  • External wire power supply is not suitable for sensors mounted on rotating parts, such as sensors mounted on rolling elements and rotating rings.
  • An object of the present invention is to overcome the problems of the above-described power supply method that cannot be applied to a rotating component of a bearing, high maintenance cost, complicated structure, and magnetization of a bearing component, and a bearing component capable of generating electricity and a bearing including the bearing component are proposed.
  • a bearing assembly capable of generating electricity, comprising a bearing component and a piezoelectric power generator disposed to the bearing component,
  • the piezoelectric power generating device includes:
  • a piezoelectric layer disposed on the bearing member for generating a charge by receiving a force change of the bearing member when the bearing including the bearing member is operated;
  • first electrode layer and a second electrode layer wherein the first electrode layer and the second electrode layer are respectively disposed on opposite sides of the piezoelectric layer for collecting electric charges generated by the piezoelectric layer to extract current ;as well as
  • a circuit board connected to the first electrode layer and the second electrode layer for rectifying a current drawn by the first electrode layer and the second electrode layer.
  • the piezoelectric power generating device further includes a power storage component disposed on the circuit board for storing power.
  • the bearing fitting further includes a sensor mounted to the bearing component and powered by the piezoelectric generator.
  • the piezoelectric power generating device further includes an insulating layer between the first electrode layer and the bearing member; and/or
  • the piezoelectric power generating device further includes a wear layer disposed on a side of the second electrode layer away from the piezoelectric layer.
  • the bearing component is a bearing ring or race or rolling body.
  • the bearing component is a bearing inner ring, at least the piezoelectric layer, the first electrode layer and the second electrode layer are disposed on an inner circumferential surface of the bearing inner ring; and / or
  • the bearing component is a bearing outer ring, and at least the piezoelectric layer, the first electrode layer and the second electrode layer are disposed on an outer circumferential surface of the bearing outer ring.
  • the bearing component is a race of a thrust bearing, and at least the piezoelectric layer, the first electrode layer, and the second electrode layer are disposed on an axially outer end surface of the race.
  • the bearing component is a rolling body, and the rolling body is a cylindrical roller, a tapered roller or a drum roller.
  • the rolling body is provided with an axial hole, and the piezoelectric generating device is disposed in an axial hole of the rolling body.
  • the invention also provides a bearing capable of generating electricity comprising a bearing fitting according to the invention.
  • the bearing fitting is a bearing fitting that rotates when the bearing is in operation.
  • the piezoelectric power generating device is integrated into the bearing member, and an external power source is not required, and in particular, power supply to the rotating member of the bearing can be realized in a simple and reliable manner.
  • Piezoelectric generators can generate electricity continuously without the need for regular maintenance.
  • the piezoelectric power generator has a simple structure and basically has no load torque increase.
  • the bearing fittings and bearings of the present invention are also not magnetized for power supply reasons.
  • Fig. 1 shows a perspective view of an example of a bearing to which the present invention can be applied.
  • FIG. 2A shows a schematic view of a bearing capable of generating electricity in accordance with a first embodiment of the present invention.
  • Fig. 2B shows a partial enlarged view of Fig. 2A.
  • FIG. 3A shows a schematic view of a rolling body of a bearing capable of generating electricity according to a second embodiment of the present invention.
  • Fig. 3B shows a partial enlarged view of Fig. 3A.
  • an exemplary bearing 100 to which the present invention may be applied includes an inner race 10, an outer race 20, and rolling bodies 30.
  • the inner ring 10 has an inner circumferential surface 10A for attachment to a mounting object (for example, a shaft), an outer circumferential surface away from the inner circumferential surface 10A, and an axial end surface 10C that connects the inner circumferential surface 10A and the outer circumferential surface.
  • the bearing shown in Figure 1 is a cylindrical roller bearing.
  • the inner ring 10 includes a flange projecting radially outward from its raceway surface, and the mark 10B indicates an outer peripheral surface of the flange that is not in contact with the rolling bodies 30.
  • one of the inner ring 10 and the outer ring 20 is fixed and the other is rotated.
  • the one fixed in the inner ring 10 and the outer ring 20 is referred to as a fixed ring
  • the one in the inner ring 10 and the outer ring 20 is referred to as a rotating ring.
  • both the inner ring 10 and the outer ring 20 may be referred to as a rotating ring.
  • Piezoelectric power generation although low in energy conversion efficiency, is a very good solution for bearings because the bearing components themselves are periodically deformed during operation, and the sensors on the bearings usually only require low power requirements (eg mW level).
  • a piezoelectric power generator (hereinafter sometimes simply referred to as "power generating device") is provided in the inner ring 10 as a rotating ring, particularly in the inner circumference of the inner ring 10. surface.
  • the power generating device includes an insulating layer 12, a first electrode layer 13, a piezoelectric layer 14, a second electrode layer 15, and an abrasion resistant layer which are disposed in order from the radially outer side toward the radially inner side in the inner ring 10 (for example, made of bearing steel).
  • Layer 16 The insulating layer 12 serves to separate the first electrode layer 13 from the inner ring 10 made of a conductive material.
  • the insulating layer 12 may be omitted.
  • the first and second electrode layers 13, 15 are used to collect the charge generated by the piezoelectric layer 14.
  • the piezoelectric layer 14 is a functional layer that generates electrical energy using a positive piezoelectric effect.
  • the wear layer 16 serves to prevent wear or damage of the power generating device, particularly when the inner ring 10 of the bearing 100 is mounted to the mounting object. Typically, the wear layer 16 can also function as an insulation.
  • the inner peripheral surface 10A of the inner ring 10 is relatively fixedly attached to the mounting object, and therefore, wear or damage of the power generating device can be prevented as compared with the outer peripheral surface of the inner ring 10 to which the power generating device is attached. Further, the radial contact force of the inner peripheral surface 10A of the inner ring 10 is usually much smaller than that of the outer peripheral surface (i.e., the raceway surface), and thus mounting the power generating device to the inner peripheral surface 10A of the inner ring 10 can protect the piezoelectric particularly. Layer 14 is not stressed.
  • the power generating device of the present invention further includes a circuit board (for example, a printed circuit board) which can be disposed, for example, on a circumferential surface of the inner ring 10 near the axial end surface (for example, the outer peripheral surface 10B).
  • the power generating device of the present invention further includes a power storage component, which may be, for example, a supercapacitor or a rechargeable battery for storing electric power generated by the piezoelectric layer 14.
  • the power storage component can be connected or set to a circuit board.
  • the two electrode layers 13, 15 can collect the opposite polarity charges generated by the piezoelectric layer 14 and output a current.
  • the output power is rectified by a power control circuit on the board and stored in a power storage component to provide voltage stabilized power.
  • the insulating layer 12 may be an oxide layer
  • the electrode material of the two electrode layers 13, 15 may be brass
  • the piezoelectric layer 14 may be a piezoelectric ceramic
  • the wear layer 16 may include a chrome plating layer.
  • circuit board may be disposed at one axial end or both axial ends of the inner ring 10.
  • first electrode layer 13, piezoelectric layer 14, second electrode layer 15, and wear layer 16 may be formed by coating, printing, bonding, welding, or the like.
  • a piezoelectric generator or a component thereof prepared in advance to the bearing fitting of the present invention (for example, the inner ring 10).
  • the piezoelectric power generating device integrated in the inner ring 10 supplies power to a temperature sensor mounted to the inner ring 10, which can be used, for example, to monitor bearing operating conditions and measure the inner ring 10 and the outer ring 20 The temperature difference between them.
  • a temperature sensor mounted to the inner ring 10 can be powered by a wire.
  • the invention is not limited to these specific applications.
  • the rolling elements 30 preferably have a center hole extending in the axial direction of the rolling elements.
  • the insulating layer 32 of the power generating device, the first electrode layer 33, the piezoelectric layer 34, the second electrode layer 35, and the wear layer 36 may be sequentially disposed.
  • the insulating layer 32, the first electrode layer 33, the piezoelectric layer 34, and the second electrode layer 35 have substantially the same as the insulating layer 12, the first electrode layer 13, the piezoelectric layer 14, and the second electrode layer 15 in the first embodiment.
  • the circuit board 37 of the power generating device of the second embodiment may be mounted in the center hole of the rolling body 30.
  • the circuit board 37 may be substantially cylindrical and mounted within the central bore of the rolling body 30 on the inside of the wear layer 36.
  • one function of the wear layer 36 is insulation, and the other function is to prevent the second electrode layer 15 or the piezoelectric layer 14 from being worn or damaged when the circuit board 37 is mounted to the center hole.
  • the power generating device according to the present invention may be generally provided on one of the rolling bodies 30 in the bearing 100.
  • the invention is not limited thereto.
  • One application example of the rolling body 30 integrated with the power generating device is to supply power to the acceleration sensor mounted to the rolling body 30, and by mounting the acceleration sensor to the rolling body 30, higher measurement accuracy/sensitivity can be obtained.
  • the power generating device is integrated in the inner ring 10 or the rolling elements 30, self-powering of the inner ring 10 or the rolling elements 30 is achieved, and no external power source is required.
  • piezoelectric power generation has high energy efficiency and basically no load torque increases.
  • the power generating device is provided on the inner ring 10.
  • the outer ring 20 may also be a rotating ring.
  • the power generating device of the present invention can be placed on the outer ring 20.
  • it is provided in an area of the outer ring that does not come into contact with the rolling elements 30.
  • it is provided on the outer peripheral surface of the outer ring 20.
  • the provision of the power generating device on the inner circumferential surface or the outer circumferential surface of the ferrule in the present application means that the piezoelectric layer and its related layer (electrode layer and possible insulating layer and wear layer) are disposed inside the ferrule.
  • the peripheral surface or the outer peripheral surface, such as a circuit board, may, but need not, be disposed on the inner circumferential surface or the outer circumferential surface.
  • the present application is not limited to providing the power generating device to the rotating ring of the bearing, and the power generating device of the present invention may be provided in the fixed ring of the bearing.
  • the rolling elements are preferably not balls for the purpose of not obstructing or damaging the raceway surface of the rolling elements.
  • Rolling elements suitable for use in the present invention may preferably be cylindrical rollers, tapered rollers or drum rollers.
  • the bearing of the present invention is not limited to the form shown in Fig. 1, and for example, the present invention can also be applied to a thrust bearing.
  • the power generating device of the present invention can be disposed on the axially outer end surface of the race or the collar (i.e., in the axial direction away from the surface of the rolling body).
  • the bearing of the present invention may also have no ferrule (for example, the inner and outer rings shown in Fig. 1).
  • the bearing of the present invention may also include only rolling elements and cages.
  • the power generating device may not directly provide the power storage means, and directly supply power to the sensor after the circuit board rectifies the current drawn from the first electrode layer and the second electrode layer.
  • the power supply object of the power generating device of the present invention is not limited to the sensor.
  • the insulating layer or the wear resistant layer may be omitted or a new insulating layer or wear layer may be added.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)

Abstract

L'invention concerne un ensemble palier apte à produire de l'électricité, l'ensemble palier comprenant des éléments paliers (10, 20, 30) et un générateur d'énergie piézoélectrique disposé au niveau des éléments paliers (10, 20, 30), le générateur d'énergie piézoélectrique comprenant : une couche piézoélectrique (14, 34) disposée sur les éléments paliers (10, 20, 30) afin de produire une charge au moyen du support du changement de force des éléments paliers (10, 20, 30) lors de l'actionnement du palier (100) comprenant les éléments paliers (10, 20, 30) ; une première couche d'électrode (13, 33) et une seconde couche (15, 35), la première couche d'électrode (13, 33) et la seconde couche d'électrode (15, 35) étant disposées respectivement des côtés opposés de la couche piézoélectrique (14, 34) afin de capter la charge produite par la couche piézoélectrique (14, 34) en vue d'extraire du courant ; et une carte de circuit imprimé (37) connectée à la première couche d'électrode (13, 33) et à la seconde couche d'électrode (15, 35) afin de redresser le courant extrait par la première couche d'électrode (13, 33) et par la seconde couche d'électrode (15, 35).
PCT/CN2018/070007 2018-01-02 2018-01-02 Ensemble palier apte à produire de l'électricité et palier apte à produire de l'électricité WO2019134065A1 (fr)

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PCT/CN2018/070007 WO2019134065A1 (fr) 2018-01-02 2018-01-02 Ensemble palier apte à produire de l'électricité et palier apte à produire de l'électricité

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PCT/CN2018/070007 WO2019134065A1 (fr) 2018-01-02 2018-01-02 Ensemble palier apte à produire de l'électricité et palier apte à produire de l'électricité

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112747031A (zh) * 2021-02-04 2021-05-04 浙江师范大学 一种滑动轴承
CN112747032A (zh) * 2021-02-04 2021-05-04 浙江师范大学 一种自发电监测的滚子轴承
CN112780669A (zh) * 2021-02-04 2021-05-11 浙江师范大学 一种带监测装置的滚子轴承

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01172623A (ja) * 1987-12-26 1989-07-07 Nec Corp 軸受け
CN202946532U (zh) * 2012-11-20 2013-05-22 浙江大学 一种压电发电滚动轴承单元
CN203962683U (zh) * 2014-06-05 2014-11-26 浙江师范大学 一种温度自监测的圆锥滚子轴承组件
CN105179476A (zh) * 2015-06-02 2015-12-23 孙美娜 用于小负载的具有集成变速功能的推力球轴承
DE102015216611A1 (de) * 2015-08-31 2017-03-02 Schaeffler Technologies AG & Co. KG Radlagereinheit für eine Fahrzeugachse
CN206150566U (zh) * 2016-11-08 2017-05-10 南京大学 一种基于压电膜供能的发电鞋

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01172623A (ja) * 1987-12-26 1989-07-07 Nec Corp 軸受け
CN202946532U (zh) * 2012-11-20 2013-05-22 浙江大学 一种压电发电滚动轴承单元
CN203962683U (zh) * 2014-06-05 2014-11-26 浙江师范大学 一种温度自监测的圆锥滚子轴承组件
CN105179476A (zh) * 2015-06-02 2015-12-23 孙美娜 用于小负载的具有集成变速功能的推力球轴承
DE102015216611A1 (de) * 2015-08-31 2017-03-02 Schaeffler Technologies AG & Co. KG Radlagereinheit für eine Fahrzeugachse
CN206150566U (zh) * 2016-11-08 2017-05-10 南京大学 一种基于压电膜供能的发电鞋

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112747031A (zh) * 2021-02-04 2021-05-04 浙江师范大学 一种滑动轴承
CN112747032A (zh) * 2021-02-04 2021-05-04 浙江师范大学 一种自发电监测的滚子轴承
CN112780669A (zh) * 2021-02-04 2021-05-11 浙江师范大学 一种带监测装置的滚子轴承
CN112780669B (zh) * 2021-02-04 2022-07-15 浙江师范大学 一种带监测装置的滚子轴承

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