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SKF has introduced a new generation of BMH sensor bearings; this bearing is insensitive to external electromagnetic field disturbances; it can therefore be used on high-performance AC motors. It can double the anti-interference of electrostatic discharge; resistance to high-frequency electromagnetic fields Disturbing ability can even advance twice. /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';
BMH sensor bearings and their components are equipped with sensor roll bearings that provide accurate data on the motion of rotating or axially moving parts. Sensor bearings are used to monitor speed, acceleration, direction of rotation, orientation and temperature on the machine. And conditioning; the sensor housing, the pulse ring and the bearing are mechanically tightly connected. Depending on their layout; the SKF sensor bearing device acts as an incremental pulse transmitter and machine control device for the motor. Suitable for asynchronous motors. This kind of bearing equipment is compact in layout; it can reliably regulate electrical equipment; it can supply bearings for specifications of 15, 20, 25, 30, 40 and 45 mm shaft diameters; The shaft diameter is supplied to the applicable product.
Sensor bearing layout:
a. Bearing b. Magnetized pulse ring c. Sensor ring d. Electrical wiring is based on sensor bearing skills; SKF has developed a range of products; such as steering and tumbling equipment; they are now validated in industrial applications. The standard layout of the tumbling equipment is with a rotating outer ring, fixed The inner ring and the combined sensor; can be equipped with different components on the outer ring according to the detailed application conditions; for the triangular pulley or the gear pulley.
The advancement of the new electronic skill sensor bearing motor makes its power density larger and larger; the layout scale becomes more and more compact. In addition, more and more inverters are used; they are used for electric motors in a variable speed drive system. Manipulation. Both trends hide a risk; that is, the general sensor bearing will be affected by the disturbance factor; the signal quality of the sensor will be greatly affected. In order to eliminate the effects of these disturbances; SKF has gone. A new way; developed a new BMH sensor bearing; this kind of bearing is largely insensitive to external electromagnetic field disturbances. Regarding signal detection; instead of using a general Hall sensor; A high-frequency induction micro-coil equipped with a touchless operation on the sensor ring; they send corresponding signals to the signal processing electronics.
The canonical sensor bearing acts as an incremental pulse transmitter inducting an electrical "standard specification" in the microcoil sensor; it changes when the bridge of the metal pulse ring passes; then the phase difference of this signal is treated as a Digital signal. This enables signal identification and signal handling independent of the fundamental electromagnetic field. This skill can be used to apply BMH sensor bearings on high-performance AC motors; signal quality is not lost.
The new sensor bearing is less subject to less disturbing high-resolution tumbling equipment: two 6201 radial ball bearings are concealed in one housing; the combined sensor can transmit 512 or 1024 signals per rotation.
BMH sensor bearings extend SKF's product offerings; BMH 6206 bearings are now in the industry for the first time. Comparative experiments on AC motors are indicated; on standard BMB 6206 bearings; when current strength is 300 A The loss of signal quality is now present; the new BMH 6206 bearing still delivers excellent quality signals at currents of 830 A (the maximum current strength that can be reached on the experimental equipment used). The painters have a wider use of the motor's depiction. In this way, the sensor bearings can be placed in direct locations; for example, in a motor brake device or around a stator coil.
The layout of the BMH sensor bearing allows it to be used under extreme conditions; even in the presence of intense oscillations and drastic changes in temperature. Because of the electronic signal handling; the new bearings are widely compatible with existing gauge bearings. Therefore, the replacement of the bearings does not require too much expense. The layout and drawing cooperation to select the appropriate materials also simplifies the installation work; for example, the plastic casing can carry an axial force of up to 5000kN in a determined part.
The strengths of the new sensor bearing:
â— According to DIN EN 61000-4-2; double the anti-interference of electrostatic discharge; from 4kV/8kV to 8kV/15kV (touch discharge/air discharge).
â— According to DIN EN 61000-4-3; twice the anti-interference of high-frequency electromagnetic fields; from 10V/m to 30V/m.
â— According to DIN EN 61000-4-8; high resistance to magnetic fields with dynamic frequency of power.
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BMH sensor bearing
Source: Bearing network time: 2013-02-24