SKF has introduced a new generation BMH sensor bearing

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SKF has introduced a new generation of BMH sensor bearings, the bearings are not sensitive to external electromagnetic interference, and therefore can be used in high-performance AC motor. The anti-jamming capability of its electrostatic discharge can be doubled or even triple, anti-interference ability of high-frequency el ectromagnetic fields.ball bearing suppliers
BMH sensor bearing their parts
Equipped with a rolling bearing of the sensor can provide accurate data on the member of the rotary or axial movement of the motion process. Use sensor bearing on the machine s speed, acceleration, rotation direction, position and temperature monitoring and adjusting the sensor housing, the pulse ring, and the bearing is mechanically tightly connected. Depending on its structure, SKF sensor bearing apparatus plays an incremental pulse transmitter of the motor and machine control means. Its special design is mainly applied to the induction motor. Such a bearing apparatus compact structure, the electrical equipment can be reliably adjusted, can provide the bearing of the standard specification for 15,20,25,30,40 and 45 mm shaft diameter, can also be provided for the various other shaft diameter applicable products.
T he sensor bearing structure:
a. bearing b. magnetized pulsar ring c. sensor ring d. electrical wiring
In sensor bearing technology based on, SKF has developed a range of products, such as the steering device and the rolling device or the like, they have been verified in industrial applications. The standard structure of the rolling device with a rotating outer ring, the fixed inner ring and an integrated sensor can be equipped with different elements on the outer ring according to the specific application for the sheave or gear pulley.roller bearing
Sensor bearing of the new electronic technologies
The motor advances made its increasing power density, more compact size structure. In addition, more and more use of the converter, control their speed adjustable drive system for an electric motor. Both trends are hidden is a danger, that ordinary sensor bearings will be subject to interfer ence factors, sensor signal quality will be greatly affected. In order to eliminate the impact of these disturbances, SKF walk a new road, developed an entirely new BMH sensor bearing, this bearing largely insensitive to external electromagnetic interference. For the detection of the signal, instead of using the conventional Hall sensor, but the use of the micro-coil sensor. On the sensor ring integrated installation of a non-contact work miniature coils of the high frequency induction, and their corresponding signals are transmitted to the signal processing electronic device.
Standard sensor bearings as incremental pulse transmitter
Induction in the "standard model" of an electrical micro-coil sensor, and it is through the bridge in a pulse of the metal ring will change, and then the phase difference of this signal is processed as a digital signal. This can be independent, free from basic fields affect the signal recognition and signal processing. Using this technology can be used in high-performance AC motor the BMH sensor bearing against loss of signal quality.
New sensor bearing less susceptible to interference
High resolution rolling device: two 6201-type ball bearings to the heart hidden within a housing,
The integration of the sensor each time the rotation can be transmitted 512 or 1,024 signal
BMH sensor bearing expand the the SKF company s product supply varieties BMH 6206 bearing the first industrial application. Comparative tests showed that in AC motor the standard BMB 6206 bearings, when the current intensity of 300 A, there have been a loss of signal quality, while BMH 6206-type bearings in the current intensity of 830A ( the test apparatus used to achieve the maximum current strength) while still being able to provide a good quality signal. This performance enables designers have broader application in the design of the motor. Thus, the sensor bearing can be installed in some direct a porti on, such as the installation or mounted next to the stator coils in the motor braking means. BMH sensor bearing structure so that it can be used under extreme working conditions, even under conditions of strong vibration and extreme temperature changes. Because of the electronic signal processing, the new bearing and existing standard bearing having a wide range of compatibility, therefore, the replacement of the bearings do not need to spend much cost. Structural design simplifies assembly work with the selection of a suitable material, such as plastic chassis at a certain site can host the axial force up to 5000kN.
New sensor bearing advantages:
● in accordance with DIN EN 61000-4-2 standard, anti-interference of the electrostatic discharge doubling from 4kV/8kV to 8kV/15kV (contact discharge / air discharge).
● in accordance with DIN EN 61000-4-3 standard, the anti-interference of high-frequency electromagnetic field triple, from 10V / m to 30V / m.
● high on power frequency magnetic field interference immunity in accordance with DIN EN 61000-4-8 standard.angular contact bearings