Troubleshooting Methods for a Gasoline Generator That Won't Start

Troubleshooting Methods for a Gasoline Generator That Won't Start:

1.Monitor Instrument Panel: During generator operation, regularly check the instrument panel for any abnormal indications. If any anomalies occur, make adjustments to ensure the generator maintains its normal working condition.

2.Balance Three-Phase Load: Adjust the three-phase load of the generator to ensure balanced current across all phases.

3.Lubricate Bearings: Follow the specified guidelines for adding oil to the bearings. Avoid overfilling or underfilling; typically, the oil level should be around 70% of the bearing chamber capacity.

4.Check for Bearing Friction: Frequently inspect the bearings for any signs of friction or unusual noises. If issues are detected, promptly shut down the generator for inspection and potential bearing replacement.

5.Inspect Parallel Leads: Check the parallel leads of the stator windings for any breaks or disconnections. If any are found, address them promptly.

6.Examine Stator Core Insulation: Inspect the insulation of the stator core for damage. If any issues are identified, perform necessary repairs to eliminate short-circuit faults between laminations.

7.Cooling System Maintenance: Reduce the intake air and cooling water temperatures, and clear any obstructions in the generator's cooling system to maintain efficient cooling.

8.Clear Air Passages: Ensure that air passages are free from obstructions to maintain proper ventilation.

About Generator Brushes (Carbon Brushes):

1.Brush Structure: Gasoline generators commonly use two types of brushes: natural graphite brushes and electro-graphite brushes.

·Natural Graphite Brushes: These brushes are made from natural graphite powder as the base material, with additives like resin and coal tar (or asphalt). They are manufactured through a process involving mixing, pressing, curing, and machining. The specific resistance of the brushes can vary depending on the proportions of the raw materials used, limiting their application to specific generator models.

·Electro-Graphite Brushes: Electro-graphite brushes are further divided into regular electro-graphite brushes and metal-graphite brushes. Regular electro-graphite brushes are primarily made from a blend of coke, wood charcoal, graphite powder, and additives like coal tar (or asphalt). They undergo two stages of baking, initially at 1300°C to form their shape and then at temperatures above 2500°C to convert the amorphous carbon in the composition into synthetic graphite.

·Metal-Graphite Brushes: Metal-graphite brushes use metal powders such as copper, silver, tin, and lead, combined with graphite powder as their raw materials. They undergo grinding, mixing, pressing, curing (or baking), and machining to form the final product.

2.Brush Functions: Brushes in a generator serve various critical functions, including:

·Input Current: They transfer external current (excitation current) to the rotating rotor.

·Output Current: They convey static electric charges on the main shaft to the ground.

·Commutating: In rectifier generators, they help change the direction of current flow.

Brushes are typically used in conjunction with a brush holder, which secures them in place and allows for easy replacement when needed.