The damage of stainless steel long axis pump frame to explosion proof motor

Long axis pump manufacturers Lijia pump has many kinds of explanation we usually use the explosion-proof motor series and type, and naming are used to distinguish the base of this point, we should all know, explosion-proof electric machine base is generally used to distinguish the type of motor, but if the stainless steel long shaft pump explosion-proof motor base damage or deformation what harm to the motor?

1, the machine two check mouth concentricity is too bad, so that both ends of the bearings can not run on the same axis of normal operation and premature damage.

2, the air gap between the fixed and the rotating is uneven, resulting in vibration and electromagnetic noise.

3, the foot is not in a plane, and is easy to damage the concentricity between drag device. If depending on the anchor bolt (or anchor) hold, it is easy to make the foot fracture. In 1970s, ijB5 used a refinery of Yanshan 2160kw explosion-proof motor, because the base not aging, deformation in the operation, so that a foot pulled off in the welding plate. The outer visible welding stress when the legacy of the great.

4, the main reason for the deformation of the stainless steel long axis pump motor frame is the stiffness difference. The stiffness of another problem can not be ignored is that with the iron core and winding one becomes a stator, the force in a torque force under the action of the same or very close to the natural frequency of vibration when the change of frequency and base it is to produce resonance. Resonance makes the deformation of the frame increase rapidly. When the resonance occurs, the stress on the base of the frame may increase to the dangerous value, which makes the frame damage or produce greater deformation.

5, the frame is easy to produce uneven deformation in the radial direction, if the base in the iron core due to deformation and uneven contraction, then the stator core uneven radial force. The motor stator pole number, because the narrow and the magnitude of the deformation of rollers is greater than 2, and the air gap, 4 very small, so the sweeping bad will happen to them on the head is not surprising. The iron core is squeezed unevenly and there is a hidden danger of "turning a blind eye", that is, the consumption of iron loss will be increased somehow, and the harm will not need to be neglected.