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08-10
Learn more about diesel generators together
1. The basic equipment of diesel generator set includes six systems, which are oil lubrication system; Fuel oil system; Control and protection system; Cooling and heat dissipation system; Exhaust system; Starting system;

2 diesel generator set to use professional oil, because oil is the blood of the engine, if the use of unqualified oil will lead to the engine bearing bush bite death, gear teeth, crankshaft deformation fracture and other serious accidents, until the whole machine scrap. The new machine needs to replace the oil and oil filter after a period of time, because the new machine in the run-in period will inevitably have impurities into the oil pan, so that the oil and oil filter physical or chemical changes.

3. When the customer installs the unit, the exhaust pipe should be tilted down 5-10 degrees, mainly to prevent rain from entering the exhaust pipe and avoid major accidents. General diesel engines are equipped with a manual oil pump and exhaust bolts, the role of which is used to remove the air in the fuel line before starting.

4. The automation level of diesel generator sets is divided into manual, self-starting, self-starting and automatic mains power conversion cabinet, remote control (remote control, telemetry, remote monitoring).

5. The output voltage standard of the generator is 400V instead of 380V, because the output line has voltage drop loss.

6. The use of the diesel generator set must be smooth air, the output of the diesel engine is directly affected by the amount of air and air quality, and the generator must have enough air to give cooling. So the use of the field must be smooth air.

7. In the installation of oil filter, diesel filter, oil and water separator should not be used to screw the above three tools too tight, but only by hand to do not leak? Because if the sealing ring is too tight, under the action of oil bubble and body heating, it will thermal expansion and produce a lot of stress. Cause damage to filter shell or separator shell itself. What is more serious is that the screw of the body is damaged beyond repair.
08-10
How do you use a diesel generator in extreme cold
Diesel generator set in the high altitude plateau area and in the extreme cold climate conditions under the operation of how to use diesel generator set.

Diesel generator set matching engine, especially natural intake engine when used in plateau area, due to the thin air cannot be like in the sea level so much fuel combustion and lose some power, for natural intake engine, general every 300 m rise about 3% power loss, so in plateau does work, Low power should be used to prevent smoke and excessive fuel consumption.

Operating in cold climate conditions: add auxiliary starting equipment (fuel heater, oil heater, water jacket heater, etc.) Use fuel heater or electric heater to heat the cooling water and fuel oil and lubricating oil of the cold engine, so that the whole engine can be heated up so that it can start smoothly.

The mixture (or air) entering the cylinder is heated with an intake preheater (electric or FLAME preheater) to increase the compression endpoint temperature and improve ignition conditions. The method of electric heating is to install the electric plug or electric wire in the intake pipe to directly heat the air intake, which does not consume the oxygen in the air and does not pollute the air intake.

Adopt high energy battery, such as current nickel metal hydride battery and nickel cadmium battery. Heat or insulate batteries. If the temperature in the equipment room drops below 0 ° C, equip a battery heater. To maintain the capacity and output power of the battery.
08-10
Diesel generator set some technical questions and answers
1. What are the conditions for the parallel use of two generating sets? What device is used for parallel work?

Answer: THE CONDITION THAT USES PARALLEL MACHINE IS TWO MACHINE INSTANTANEOUS voltage, FREQUENCY, PHASE IS same. Commonly known as "three at the same time". A special parallel device is used to complete the parallel work. Generally, fully automatic cabinets are recommended. Try not to manually parallel the machine. Because the success or failure of manual integration depends on human experience.

2, what is the power factor of the three-phase generator? Can a power compensator be added to increase the power factor?

A: The power factor is 0.8. No, because the charging and discharging of capacitors will cause fluctuations in the small power supply. And unit oscillation.

3. Why do we require customers to tighten all electrical contact parts after the unit runs for 200 hours?

Answer: Diesel generator set is a vibration working device. And a lot of domestic production or assembly of the machine should use double nuts of useless. The use of spring gaskets is useless, once the electrical fasteners loose, will produce a great contact resistance, resulting in abnormal operation of the unit.

4. Why must the generator room be clean and the ground free from floating sand?

Answer: if the diesel engine inhales dirty air, the power will fall; If the generator inhales sand and other impurities, the insulation between the stator gap will be damaged, and the heavy will lead to burn.

5, why since 2002, our company generally does not recommend users to use neutral grounding when installing?

Answer: 1) The self-regulation function of the new generation generator is greatly enhanced; 2) In practice, it is found that the lightning failure rate of neutral grounding unit is high; 3) High grounding quality requirements, ordinary users can not do. Unsafe working ground is not as good as ungrounded; 4) The unit with neutral ground will cover up the leakage fault and grounding error of the load, and these faults and errors can not be exposed in the case of large current power supply of the mains.
08-10
Can the fault be judged according to the oil pressure gauge of the generator set?
First, the oil pressure is always low

Diesel generator engine no matter at low speed or high speed, low temperature or high temperature, oil pressure gauge always indicates below 0.1mpa. And accompanied by oil pressure alarm light flashing, this is the oil pressure is too low: the reason should be checked from the following aspects: first unscrew the oil ruler. See whether the oil in the oil pan is enough, whether the oil is too thin; Secondly, the oil pressure gauge and the induction plug are out of order, and the induction plug wire will be removed directly from the iron. At this time, if the oil pressure returns to normal (or remove the induction plug, briefly start the engine) or the oil is ejected from the oil channel, the pressure is very sufficient, the finger can not press, indicating that the induction plug is damaged; Replace the test with a good oil pressure gauge. If the oil pressure is normal, the crude oil pressure gauge is damaged. Check again whether the process oil plug on the body is loose, whether the oil pipe is broken, whether the pressure valve is stuck, whether the oil filter is blocked, etc. (remove the oil induction plug, start the engine briefly, if there are bubbles in the middle of the oil spray from the channel, then the oil inlet pipeline intake); Finally, check whether the oil pump is seriously worn.

Second, the oil pressure suddenly drops to zero

When the diesel generator engine is working, the oil pressure gauge indicator drops from normal value to zero suddenly, accompanied by the oil pressure indicator light flashing. At this time, we should first check whether there is oil in the oil pan. If there is no oil, it indicates that the oil pipe is broken, cracked or the oil pan oil discharge screw plug is loose, resulting in oil leakage. Secondly, check whether the oil pressure gauge and induction plug are damaged. Then check the oil pump drive shaft, drive pin is broken so that the oil pump stops working. Finally, check whether the oil filter is blocked by foreign bodies, whether the screw plug of the cleaning oil chamber of the connecting rod bearing is loose, and remove it in time.

Three, the oil pressure suddenly increased many

When the diesel generator engine runs at medium and high speed, the oil pressure gauge indicates a sudden increase from the normal value, and exceeds the pressure limiting value of the pressure limiting valve by 0.5~ 0.6mpa, and the oil pressure can not quickly drop to the specified value after the engine speed is reduced. At this time, we should first check whether the oil pressure gauge is damaged (after engine flameout, the oil pressure gauge is still indicating pressure, that is, the pressure gauge is damaged); Then check whether the main oil channel is blocked after the table (can unscrew the main oil channel process screw plug dredge); Check whether the pressure limiting valve and oil return valve are stuck and cannot be opened; Check whether the nozzle hole of the rotor type fine oil filter is blocked, resulting in all oil from the crude filter into the main oil passage, resulting in oil pressure rise.
08-10
About excess electricity generated by diesel generator sets
Diesel generating set is driven by diesel engine running, when diesel generating set equipment using the external and internal coil with electric loop formation, produce current which will generate electromagnetic force resistance torque, but by the principle of conservation of energy, consume much power drag torque will be how much extra do the work, the dry speed stability of diesel generator set, Electromagnetic negative force to do more work means that the negative torque is large, colloquially, that is, the greater the power of the use of electrical equipment, the more difficult it is to turn the diesel engine.

When there is no use of electrical equipment, diesel generator set inside the coil, no current coil to generate electromagnetic torque, but diesel generating sets of bearings, belts, there will be Yin, torque and power consumption of diesel engine, the other is a four-stroke diesel engine itself, only one power stroke, maintain its rapid operation also to have fuel consumption, The efficiency of diesel engine as a heat engine of internal combustion engine is also limited.

When the diesel generator power is large and the electrical power is small, these losses may be greater than the power of the electrical equipment. Diesel engine power is difficult to do small, so the minimum power of diesel generator set is a few kilowatts, for millions of power construction and, this load can be ignored, the above analysis confirms what you say that the consumption of electrical oil does not exist, but it will not consume more oil, That is to say, diesel generator sets in the operation of the load hours a few flat no excess power will be wasted.

Chongqing wankeda Co., Ltd.

Learn more about diesel generators together

How do you use a diesel generator in extreme cold

Diesel generator set some technical questions and answers

Can the fault be judged according to the oil pressure gauge of the generator set?

About excess electricity generated by diesel generator sets

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