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Reasons for the Damage of Compound Crusher Motor

Author: HXJQTime: 8/21/2012 5:34:15 PM

The compound crusher is one of the most common equipment in crushing and sand making production line, while its motor is usually damaged; Hongxing machine experts holds view that there are many reasons lead to the damage of compound crusher motor; besides conventional failure cause of common motor power equipment, the running fault of compound crusher also can damage the motor, shown as follows:

1. The reliability and sensitivity of the automatic pressure switch; the starts and stops of compound crusher are normally controlled by the automatic pressure switch (pressure relay) directly driving alternating current contactor. The automatic pressure switch mostly adopts mechanical structure, which act on contact by the compress and release of spring. The congenital deficiencies or improper adjustment of automatic pressure switch can cause motor damage.

2. The electrical control (especially for low-power type) is relatively simple, they are generally work independently by stand-alone group and lying in un-professional operation occasions with torpid repair and maintance, which relatively increase in repeat expansion rate of failure.

Due to the compound crusher works in harsh conditions in long term, the wear of rotor bearing is exacerbated. The rotor is irreplaceable for crusher so that crusher cannot work without it. However, it is also fragile; the bearing rotor is not only expensive, but also replaced difficultly, often resulting in the cut-off loss.

How to take effective measures to improve the rotor bearing life is an important matter that our customers concern about, asking us pay more attention:

First, make correct choice of rotor-bearing model. Double row radial spherical roller bearing with strong bearing capacity and aligning performance, it is worthy being chosen. In addition, the rotor which is with design life of 5000 ~ 10000h is appropriate.

Second, improve the force status of crusher bearing. The impact load working on the bearing depends on the impulse acting on the rotor and the support flexibility of bearing. Increasing bearing support flexibility will reduce the impact load working on the bearings. To this end, we could add rubber sheet with appropriate thickness between the bearing and the support frame to improve the bearing support flexibility and to achieve the purpose of extending the service life.

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