Skip to main content

Causes of Overheating in Diesel Generator

This article will guide you to learn the cause of overheating in a diesel generator.

The operating temperature of diesel generator has a clear allowable range. If it exceeds or falls below the allowable temperature range, the diesel generator may be damaged and even cause accidents. There are many reasons for the overheating of diesel generators.
1. The diesel generator does not operate in accordance with the prescribed technical conditions, such as too high stator voltage, increased iron loss, too large load current, increased copper loss in stator winding, too low frequency, which will slow down the speed of cooling fan and affect the heat dissipation of generator, and the power factor is too low. It will increase the rotor excitation current and then cause the rotor to heat. Users should check that the monitoring instrument’s instructions are correct. If the monitor is abnormal, must carry on the necessary adjustment and the processing, causes the generator to operate according to the stipulated technical condition.
2. The three-phase load current of the diesel generator is unbalanced, and the over-loaded one-phase winding will overheat. If the difference of the three-phase current exceeds the rated current by 10 percent, it is a serious phase current imbalance, and the three-phase current imbalance will produce a negative sequence magnetic field, thus increasing the loss. Causes the magnetic pole winding and hoop and other parts to heat. The three-phase load should be adjusted to keep the current balance as far as possible.
3. The air duct is blocked by dust and the air is not well ventilated, which makes it difficult for the diesel generator to dissipate heat.
4. If the inlet air temperature is too high or the inlet water temperature is too high, the cooler will be blocked. The inlet or inlet temperature should be lowered to remove the clogging in the cooler. Before the fault is eliminated, the generator load should be limited to reduce the generator temperature.
5. Bearings with too much or too little grease should be added as prescribed, usually 1 / 2 / 1 / 3 of the bearing chamber (upper limit of low speed and lower limit of high speed), and should not exceed 70% of the bearing room.
6. Bearing wear. If the wear is not serious, the bearing will overheat locally, and if the wear is serious, the stator and rotor may be friction, which will cause the stator and rotor to overheat. Bearings should be checked for noise, if any stator and rotor friction, should immediately stop for repair or replacement of bearings.

标签：

Comments

Post a Comment

Popular posts from this blog

What Is the Difference Between Electric Motor and Electric Generator

An electric motor is an electrical machine that converts electrical energy into mechanical energy. Most electric motors operate through the interaction between the motor's magnetic field and winding currents to generate force. In certain applications, such as in regenerative braking with traction motors, electric motors can be used in reverse as generators to recover energy that might otherwise be lost as heat and friction. An electric generator operates in the reverse direction, converting mechanical energy into electrical energy. Electric generator can be divided into various type, open type, silent type, trailer type, portable type and container type, etc. Electric generator is mainly composed of diesel engine & alternator. Electric generator set is mainly composed of engine, alternator, control module, and common base. Electric generator :- Electric generator is a type of machine which converts mechanical input (energy) into electrical output (
1 comment
Read more

Engine Fault Code Messages - Volvo Penta Engine

Volvo Penta Engine Fault Code When a malfunction has occurred and the diagnostic system has generated one or more fault codes, these are read out differently depending on the equipment used. Please refer to “Fault code messages”. If the system indicates that a fault code has been set: 1 Cut engine speed to idle, or shut the Volvo engine off. 2 For DCU/DU Read the fault code from the display, please refer to Reading fault codes via the DCU or Reading fault codes via the DU. For CIU press the diagnostic button and read the fault code, by observing the flashing of the diagnostic lamp. Refer to Reading fault codes via the diagnostic lamp, CIU. 3 Look up the fault code in the Fault Code Register chapter and take the recommended measures. Reading fault codes via the DU (Display Unit) Depending on the severity of the fault the text, either WARNING! or ALARM STOP (a buzzer sounds) will be shown on the display 1 Press any button to come to the fault list. The f
Post a Comment
Read more

Types of Diesel Engine and Application of Diesel Generator

This article will guide you to learn diesel engine types and important role of diesel generator. If you are interested, please keep reading.  What Are Diesel Engines? A type of internal combustion engine more accurately known as a compression ignition engine is designed to provide power by compressing the fuel at high temperature and significant pressure until it ignites. Diesel engines are either two-stroke or four-stroke .   ‘Stroke’ means the movement of the piston in the engine. Two-stroke This engine uses one stroke in each direction.   The first stroke being compression, which results in the ignition of the compressed fuel.   The return stroke brings new fuel into the cylinder. Four-stroke This engine has one compression stroke and one exhaust stroke and each one of those has a return stroke – hence, four-stroke. The compression stroke compresses the fuel/air mixture prior to ignition.   The exhaust stroke pushes the burnt gases out the exhaust. The
Post a Comment
Read more