20kw diesel generator,20kw diesel generator engine set for sale

Electromagnetic factors: reactive or excitation current time adjustment, carbon brushes spark significant change. When exciter commutator, brush and commutator segments poor contact, the contact resistance is too large; oxide film Bohou commutator or slip ring uneven, causing the carbon brush current imbalances in the distribution; or sudden load changes, and burst leading to a short circuit between the commutator chip voltage distribution anomaly; unit overload and unbalanced; Selection unreasonable carbon brushes, carbon brush spacing ranging; carbon brush quality problems, and so on.

      Mechanical factors: Commutator center errors, rotor imbalance; large unit vibration; commutation inter-chip insulation protruding or commutator segment protruding; carbon brush contact surface not smooth grinding, or commutator surface roughness caused by poor contact; commutator surface dirty; each commutation pole under the air gap ranging; carbon brush spring pressure on uneven or size unfit; carbon brushes in the brush holders too loose occur beating or too tight carbon brush in the brush holder He was stuck like. Unit operating speed to reduce vibration or improve, sparks will be reduced.

      Chemical factors: unit operating in corrosive gases, or unit operation space lack of oxygen on the surface of the commutator and brushes in contact with the copper layer of naturally formed oxide film destruction of the already formed approximately linear resistor commutation no longer exist, the process of re-contacting surface oxide film is formed in the commutator spark intensified. Commutator (or slip ring) is corrosive acid gas or oil. Brushes and commutator is pollution

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