WO2016005550A1 - Unité de palier à capteurs pour détection de charges de choc - Google Patents

Unité de palier à capteurs pour détection de charges de choc Download PDF

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Publication number
WO2016005550A1
WO2016005550A1 PCT/EP2015/065801 EP2015065801W WO2016005550A1 WO 2016005550 A1 WO2016005550 A1 WO 2016005550A1 EP 2015065801 W EP2015065801 W EP 2015065801W WO 2016005550 A1 WO2016005550 A1 WO 2016005550A1
Authority
WO
WIPO (PCT)
Prior art keywords
sensors
signal
bearing
rolling elements
locations
Prior art date
Application number
PCT/EP2015/065801
Other languages
English (en)
Inventor
Sebastian Ziegler
Andreas Clemens Van Der Ham
Original Assignee
Aktiebolaget Skf
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 Aktiebolaget Skf filed Critical Aktiebolaget Skf
Publication of WO2016005550A1 publication Critical patent/WO2016005550A1/fr

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Classifications

    • 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
    • F16C19/522—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions related to load on the bearing, e.g. bearings with load sensors or means to protect the bearing against overload
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • F03D80/70—Bearing or lubricating arrangements
    • 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
    • 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
    • F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/0009—Force sensors associated with a bearing
    • G01L5/0019—Force sensors associated with a bearing by using strain gages, piezoelectric, piezo-resistive or other ohmic-resistance based sensors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00—Testing of machine parts
    • G01M13/04—Bearings
    • 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
    • F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
    • F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
    • 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
    • F16C2300/00—Application independent of particular apparatuses
    • F16C2300/10—Application independent of particular apparatuses related to size
    • F16C2300/14—Large applications, e.g. bearings having an inner diameter exceeding 500 mm
    • 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
    • F16C2360/00—Engines or pumps
    • F16C2360/31—Wind motors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

Definitions

  • the invention relates to a bearing unit provided with sensors and processing means for detecting a shock load on the bearing.
  • the bearing unit may be used for condition monitoring of wind turbines, underwater turbines and other rotating applications where the bearing is subject to shock loading.
  • Condition monitoring of wind turbines is an important issue, in particular in the case of off-shore wind parks which are difficult to access by maintenance staff.
  • Bearings for use in wind turbines in particular main shaft bearings holding a rotor, have very large dimensions and have to support immense loads while reliably operating under a wide range of environmental conditions. Replacement is complicated and expensive and should be avoided as far as possible. It is therefore very important to provide reliable estimates of bearing lifetime, which is usually done using parameters measured by sensor systems on the bearing. It is known to provide temperature sensors, strain sensors, vibration- or acoustic emission sensors and acce I ero meters on bearing rings.
  • the sensors correlate the strain/displacement on the bearing side face with individual roller loads by means of a mathematical model.
  • the peak-to-peak values of the sensor signal correspond to the roller load.
  • shock/transient loads are important contributions to lifetime estimates of bearings and other components in wind turbines. These happen e.g. during emergency shutdown, swivelling of the wind turbine nacelle, manoeuvres, abrupt changes in wind conditions or turbulences.
  • the frequency of the shock/transient loads is significantly higher than the roller pass frequency dominating the sensor signals corresponding to the roller load.
  • Reliable shock detection is further important to trigger emergency stops of a wind turbine or other machine in which the bearing is mounted. Accelerometers are used to detect shocks in many applications. However these do not allow quantification of the load on the bearing.
  • a strain gauge to a structure which is carrying the load, this could be a shaft or a surrounding component. However this is not possible with a bearing because the load is continuously changing in a macroscopic scale caused by the rollers passing by.
  • the invention relates to a bearing comprising an inner ring, an outer ring and at least one row of rolling elements arranged between the raceways in a cage, wherein a predetermined equidistant angular spacing of the rolling elements is maintained by the cage.
  • the rolling elements may in particular be cylindrical, spherical or toroidal rollers. However, the invention is not limited to any particular type of rolling elements.
  • the bearing further includes at least two sensors attached to one of the bearing rings at different predetermined angular locations. The sensors are configured to generate a signal having one signal component with a frequency of the rolling elements passing by the locations of the sensors. It is proposed that the predetermined angular locations of the at least two sensors are chosen such that phase angles of said one signal component are different.
  • the components corresponding to the roller pass frequency in the two signals cancel each other out at least partially when the signals of the sensors are summed, such that the weight of the other components in the signal, in particular the contributions of transient or shock loads, is increased correspondingly.
  • the invention is suitable for use on main shaft bearings of wind turbines but may be applied to any kind of bearing.
  • the bearing has a small ratio of ring width to bearing diameter, the ratio being preferably below 0.1 .
  • the phase angle of the i th sensor corresponds to i/n * 360°.
  • the locations of the sensors are equidistantly distributed over the period length of the rollers.
  • "corresponds to” relates to an equivalence relation, wherein phase angles differing by integer multiples of 360° and angular differences between angular locations on the circumference of the rings differing by integer multiples of the pitch or spacing between adjacent rollers are considered equivalent. In cases where more than two sensors are used, it is possible to detect uneven deformations or higher multipole moments of the deformations of the ring.
  • only two sensors are used and the predetermined angular locations are chosen so as to correspond to an uneven integer multiple of one half of the angular spacing between the rolling elements such that the components with the frequency of the rolling elements have opposing phase angles in the signals of the at least two sensors.
  • these could be arranged with phase angles of 120° between adjacent sensors and in embodiments with four sensors, these could be arranged with phase angles of 90° between each two of adjacent sensors.
  • the sensor locations need not be homogeneously distributed over the circumference of the bearing ring. What counts is the distribution over the period of the rollers within the equivalence relation defined above.
  • the bearing unit of the invention further comprises signal processing means configured to sum up signals of the at least two sensors and to detect a shock load acting on the bearing, based on the sum signal.
  • the summing may be done by software using digitalized signals or using an electronic circuit.
  • the sensors used in the inventive bearing unit are sensors which can detect elastic deformation of the bearing ring due to the passage of the rolling elements.
  • the sensors are formed as fibre-Bragg gratings in an optical sensing fibre, which is attached to an outer circumferential surface of the bearing outer ring.
  • the optical sensing fibre may also be attached to an inner circumferential surface of the bearing inner ring.
  • the optical sensing fibre is provided in a circumferential groove in the inner/outer bearing ring.
  • strain gauges are used, whereby the sensors may be provided in a sensor package having a housing and optionally further sensors such as a vibration sensor, a temperature sensor, an acoustic emission sensor, an accelerometer or the like.
  • the at least two strain gauges may be mounted to a circumferential surface of one of the bearing rings, or to a side face of one of the bearing rings.
  • the at least two strain gauges are provided in a recess of the bearing ring.
  • the bearing When the at least two sensors are attached to an axially oriented side face of a bearing ring, the bearing preferably has angled raceways, tapered raceways or spherical raceways.
  • the rolling element bearing is a type of bearing that is adapted to withstand not only radial loads, but also axial loads. In such bearings, deformation of the bearing ring due to the passage of rolling elements is more readily detectible at the axial side face of a bearing ring.
  • the sensorized bearing unit as descried above lends itself to the implementation of a method for detecting a shock load on a rolling element bearing. The invention proposes that the method comprises the steps of:
  • ⁇ providing a ring of the bearing with at least two sensors, located at different predetermined angular locations, wherein the sensors are configured to generate a signal having one signal component with a frequency of the rolling elements passing by the locations of the sensors, wherein the predetermined angular locations of the at least two sensors are chosen such that phase angles of said one signal component are different;
  • the method may further comprise storing or forwarding a signal indicating the detected shock load.
  • Fig. 1 is a schematic representation of a bearing according to the invention
  • Fig. 2 is a series of graphs showing different types of load signals obtained by sensors of a main shaft bearing of a wind turbine;
  • Fig. 3 is a series of graphs showing the signals obtained by sensors of the bearings according to Fig. 1 and of a sum thereof; and Fig. 4 illustrates a network of wind turbines equipped with bearings according to Fig. 1 and a control- and monitoring server.
  • Fig. 1 is a schematic representation of a bearing unit 10 according to the invention.
  • the bearing 1 0 is a double row taper roller bearing with an outer ring 10a and an inner ring 10b which have tapered raceways.
  • the bearing 10 is designed for use as a main shaft bearing for a wind turbine and has a very large diameter of up to 2 - 4m.
  • At least one row of rollers 12 is arranged between the raceways of the rings 10a, 10b in a cage 14, wherein a predetermined equidistant angular spacing ⁇ 2 of the rolling elements 1 2 is maintained and defined by the cage 14.
  • the invention is not limited to any specific kind of rolling element bearing and the bearing 1 0 can have one or two rows of rolling elements and the rolling elements can be balls or spherical, cylindrical or toroidal rollers.
  • Two strain sensors 1 6, 1 6' are attached to an axially oriented side face of the bearing outer ring 10a at different predetermined angular locations, wherein the sensors 1 6 ,1 6' are configured to generate a signal having one signal component with a frequency of the rollers 12 passing by the locations of the sensors 16 ,1 6'.
  • the latter frequency is sometimes referred to as the roller pass frequency.
  • the predetermined angular locations of the at least two strain sensors 16, 1 6' are chosen such that phase angles of said one signal component are different.
  • the angular spacing ⁇ of the sensors 16, 16' differs from an integer multiple of the angular spacing ⁇ 2 between the angular locations of the rollers 1 2, which is equal to the 360° divided by the number of rollers.
  • the predetermined angular locations are chosen so as to correspond to an uneven integer multiple of one half of the angular spacing ⁇ 2 between the rolling elements 1 2 such that the components with the frequency of the rolling elements 12 have opposing phase angles in the signals of the at least two sensors 1 6, 16'.
  • the sensors 16, 16' are formed as strain gauges and are embedded in pertinent recesses in the outer ring 1 0a of the bearing 10 and are integrated in a sensor housing containing basic signal processing and energy harvesting means as well as a wireless or wired communication interface for communication the direct results or the pre-processed results to an outside monitoring unit 18.
  • the monitoring unit 18 may be arranged in a nacelle of the wind turbine or in a remote server 20 (Fig. 4) for maintenance data.
  • the monitoring unit 18 is a signal processing means configured to sum up signals of the at least two sensors 16, 16' and to detect a shock load acting on the bearing 10, based on the sum signal as shown in further detail in Fig. 3.
  • the monitoring unit 1 8 implements a method for monitoring a wind turbine having a bearing 10 as shown in Fig. 1 .
  • the method comprises the steps of summing the signals in order to obtain a signal sum; evaluating the signal sum so as to detect shock load; storing information on the shock load in a storage unit of the monitoring unit 18 and forwarding a signal relating to the shock load to a remote maintenance data server 20 (Fig. 4) storing data used for calculating the expected remaining bearing lifetime.
  • a shock load is detected once the sum signal exceeds a predetermined threshold value ⁇ , which may depend on an average value of the signal in the last few minutes or second.
  • the detection of a shock load may lead to an emergency stop of the windmill and to a swivelling of the windmill head.
  • the threshold for the emergency stop can be set to a higher value than the threshold ⁇ used for identifying the shock events which are accounted for in the context of the lifetime calculation.
  • Fig. 2 is a series of graphs showing different types of load signals obtained by sensors 16, 16' of a main shaft bearing of a wind turbine.
  • Periodic oscillating signal components as illustrated in the uppermost graph exist mainly due to the passing rollers at the roller pass frequency and at lower frequencies due to a mass imbalance of the rotor and due to the wings passing the tower.
  • the load signal of the sensors further comprises stochastic components due to regular hydrodynamic and aerodynamic forces as illustrated in the graph in the middle and transient events caused a stop of the windmill or a swivelling of the windmill head as illustrated in the graph on the bottom of Fig. 2.
  • the transient events result in a peak with a width of the order of several seconds. Shock loads can be caused e.g.
  • Fig. 3 is a series of graphs showing the signals obtained by sensors of the bearings according to Fig. 1 and of a sum thereof.
  • the uppermost graph is a signal of the first sensor 16 and the second graph from the top is a signal of the second sensor 16'.
  • Both sensor signals contain a basic sinusoidal component of the signal caused by the passing rollers, wherein these components have opposing phases for the two components.
  • the lowermost graph is a sum of the two signals from the sensors 16, 16'. Due to the opposite phases, the basic roller-pass components of the signals cancel each other out such that the weight of the remaining components, in particular of a peak in the signal stemming from a shock event as illustrated on the right-hand side of the graphs in Fig. 3, increases such that the evaluation of the remaining components and the detection of transient or shock loads is facilitated.
  • the threshold ⁇ is illustrated as well.
  • the visualization of sensor signals in Fig. 3 shows that the sensor signal of the sensor 16 and the sensor signal of sensor 16' can be summed up and will then partially cancel each other out. A shock load will lead to a peak in both sensor signals and in the sum signal, where it can then be reliably detected and quantified.
  • Fig. 4 illustrates a network of wind turbines 22 equipped with bearings 10 and monitoring units 18 according to Fig. 1 and a control- and monitoring server 20.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Combustion & Propulsion (AREA)
  • Wind Motors (AREA)

Abstract

L'invention concerne une unité de palier comprenant un palier à éléments roulants doté d'au moins deux bagues (10a, 10b) et d'au moins une rangée d'éléments roulants (12) disposée entre les bagues dans une cage (14), un espacement angulaire équidistant prédéfini (δ2) des éléments roulants (12) étant maintenu par la cage (14), et au moins deux capteurs (16, 16') fixés à l'une des bagues (10a) de palier à différents emplacements angulaires prédéfinis, les capteurs (16, 16') étant conçus de manière à produire un signal comportant une composante de signal ayant une fréquence des éléments roulants (12) passant par les emplacements des capteurs (16, 16'). On propose que les emplacements angulaires prédéfinis des deux, ou plus, capteurs (16, 16') soient choisis de telle sorte que les angles de phase de ladite composante de signal soient différents et l'unité comprend en outre un moyen de traitement de signal (18) conçu pour additionner les signaux des deux, ou plus, capteurs (16, 16') et pour détecter une charge de choc agissant sur le palier sur la base du signal de somme.
PCT/EP2015/065801 2014-07-10 2015-07-10 Unité de palier à capteurs pour détection de charges de choc WO2016005550A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1412295.6A GB2528646A (en) 2014-07-10 2014-07-10 Generator assembly
GB1412295.6 2014-07-10

Publications (1)

Publication Number Publication Date
WO2016005550A1 true WO2016005550A1 (fr) 2016-01-14

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PCT/EP2015/065801 WO2016005550A1 (fr) 2014-07-10 2015-07-10 Unité de palier à capteurs pour détection de charges de choc

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WO (1) WO2016005550A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019200780A1 (de) * 2019-01-23 2020-07-23 Robert Bosch Gmbh Führungswagen für eine Streckenführung, Streckenführung mit dem Führungswagen, und Verfahren zur Ermittlung einer Last des Führungswagens
US20210131894A1 (en) * 2019-11-05 2021-05-06 Aktiebolaget Skf Bearing unit having at least two kinds of sensing elements mounted on a housing
US11566670B1 (en) 2021-12-16 2023-01-31 Regal Beloit America, Inc. Sensor bearing housing

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020108328B3 (de) * 2020-02-25 2021-05-20 Schaeffler Technologies AG & Co. KG Verfahren zur Herstellung eines Wälzlagersystems und System zur Ermittlung einer Anzahl von Sensoren und Sensorpositionen in einem Wälzlagersystem

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10041093A1 (de) * 2000-08-22 2002-03-14 Bosch Gmbh Robert Sensoranordnung in einem Wälzlager und Verfahren zur Auswertung des Ausgangssignals der Sensoranordnung
FR2901018A3 (fr) * 2006-05-12 2007-11-16 Renault Sas Procede de mesure des parametres d'adherence entre la voie d'un vehicule et la chaussee
US20110125421A1 (en) * 2008-04-10 2011-05-26 Ntn Corporation Wheel bearing with sensor
FR2961871A1 (fr) * 2010-06-25 2011-12-30 Renault Sa Roulement de roue de vehicule automobile comprenant un capteur d'efforts
US20130322801A1 (en) * 2010-12-06 2013-12-05 Aktiebolaget Skf Load sensing on the basis of transverse deformation

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Publication number Priority date Publication date Assignee Title
US5952587A (en) * 1998-08-06 1999-09-14 The Torrington Company Imbedded bearing life and load monitor
WO2011148846A1 (fr) * 2010-05-24 2011-12-01 Ntn株式会社 Roulement de roue instrumenté

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10041093A1 (de) * 2000-08-22 2002-03-14 Bosch Gmbh Robert Sensoranordnung in einem Wälzlager und Verfahren zur Auswertung des Ausgangssignals der Sensoranordnung
FR2901018A3 (fr) * 2006-05-12 2007-11-16 Renault Sas Procede de mesure des parametres d'adherence entre la voie d'un vehicule et la chaussee
US20110125421A1 (en) * 2008-04-10 2011-05-26 Ntn Corporation Wheel bearing with sensor
FR2961871A1 (fr) * 2010-06-25 2011-12-30 Renault Sa Roulement de roue de vehicule automobile comprenant un capteur d'efforts
US20130322801A1 (en) * 2010-12-06 2013-12-05 Aktiebolaget Skf Load sensing on the basis of transverse deformation

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019200780A1 (de) * 2019-01-23 2020-07-23 Robert Bosch Gmbh Führungswagen für eine Streckenführung, Streckenführung mit dem Führungswagen, und Verfahren zur Ermittlung einer Last des Führungswagens
US20210131894A1 (en) * 2019-11-05 2021-05-06 Aktiebolaget Skf Bearing unit having at least two kinds of sensing elements mounted on a housing
US11692888B2 (en) * 2019-11-05 2023-07-04 Aktiebolaget Skf Bearing unit having at least two kinds of sensing elements mounted on a housing
US11566670B1 (en) 2021-12-16 2023-01-31 Regal Beloit America, Inc. Sensor bearing housing

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Publication number Publication date
GB201412295D0 (en) 2014-08-27
GB2528646A (en) 2016-02-03

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