1. Principle of Diesel Generator: Diesel engine drives the generator to operate and convert diesel energy into electrical energy.
In the cylinder of the diesel engine, the clean air filtered by the air filter is fully mixed with the high pressure atomized diesel fuel injected by the injector. Under the upward pressure of the piston, the volume decreases and the volume decreases. the temperature rises rapidly, reaching the ignition point of diesel. Diesel ignites, the gas mixture burns violently, rapidly expands in volume and pushes the piston down, which is called "work".
2. Gasoline Generator: The gasoline engine runs the generator, converting gasoline energy into electrical energy.
In the cylinder of a gasoline engine, the gas mixture burns violently, expands rapidly in volume, and pushes the piston down to do work. Whether it is a diesel generator on a gasoline generator, each cylinder does work in a certain order. The thrust acting on the piston becomes the force that causes the crankshaft to rotate through the connecting rod, thereby causing the crankshaft to rotate.
By installing the brushless synchronous alternator coaxially to the crankshaft of the electric machine, the rotation of the electric machine can be used to drive the generator rotor. Using the principle of "electromagnetic induction", the generator. will produce an induced electromotive force. The charging circuit can generate current.
Detailed information:
Startup and execution of operations:
1 For units that have been closed. out of order for more than 24 hours, the test valve must first be opened and the oil pump must be started. For stopped unitsfor more than 7 days, the insulation resistance of the exciter and the operating circuit shall be measured and shall meet the requirements.
2. Start the fuel pump, release the air into the pipeline and observe whether the voltage is within the specified range. If it is normal, it can be officially launched.
3. Check whether the voltage of the starting power supply meets the requirements. If the voltage is normal, press the start button and release it after the diesel engine has run normally.
4. Once the diesel engine is running, observe the value indicated on the oil pressure gauge. When it exceeds the specified value, stop the oil pump, close the scavenge pump drain valve and tighten the front. clutch screw.
5. When the generator starts, it is considered that the generator and all electrical equipment are charged and the human body is not allowed to touch the parts undertension.
6. After starting the generator, the speed of the diesel engine should be gradually increased, and inspection should be carried out before power transmission.
7. Gradually adjust the speed of the diesel engine, but when adjusting, pay attention to whether the generator is operating normally. Under normal circumstances, the slip ring and commutator brushes should have no abnormal beating, sparking or noise.
8. Adjust the generator output voltage and frequency. The voltage value should be stable and reach 380V+-10V, and the frequency should reach 50Hz+-0.5Hz.
Baidu Encyclopedia——Generator
When installing the engine piston, special attention should be paid to the piston
1 Opening clearance inspection method: The opening clearance of the piston ring. of the diesel generator refers to the opening clearance of the piston. Once the segment is installed ins the cylinder, the space between the two ends of the ring opening is also called end space. It is used to prevent piston ring jamming. in the cylinder due to thermal expansion. When checking the piston ring opening gap, install the selected piston ring flat into the cylinder, use the piston head to push the piston ring to the unworn part of the cylinder, and then use a feeler gauge to measure aperture gap. If the deviation is greater than the specified value, another piston ring must be selected; if it is less than the specified value, a hand grinder or a fine flat file can be used to file the first end of the segment. When filing, you should pay attention to the smoothness of the ring mouth. After filing, remove the burrs on the outer mouth of the ring to prevent the sharp edges of the emouth of the ring does not fatigue the cylinder wall.
2. Side gap inspection method: The side gap of the diesel generator piston ring refers to the space between the ring and the plane side of the ring groove. When measuring, place the piston rings in their respective grooves. They must be able to rotate flexibly without any stagnation. Use a feeler gauge to measure the gap on one side. When detecting the side clearance of the scale ring, it should be installed in the cylinder with the piston and measured, and its value should conform to the regulations. If the side gap is too large, it will affect the sealing effect of the air ring, and it needs to be readjusted if the side gap is too small or the ring is wider than the groove of the ring, except the trapezoidal ring, it must be readjusted and ground. Rings of other shapes can be placed on the joint on a gase No. 0 on a platform or flat glass. When grinding, keep the ring close to the emery cloth and move it evenly. You can also use flat glass coated with abrasive sand and dripping oil for grinding.
3. Clearance inspection method: Diesel generator piston ring clearance refers to the space between the back of the piston ring and the bottom surface of the ring groove after the piston and piston ring are installed in the cylinder. For ease of measurement, the measurement value is generally based on the distance the piston ring falls into the ring groove under the shore. It is generally believed that this measurement value only needs to be greater than 0~0.35mm. If it is too small, the ring will get stuck in the cylinder. If the clearance is too low, it can be resolved by digging deeper piston ring grooves.
4. How to check the elasticity of the segpiston ring: To check the elasticity of the piston ring, place the piston on the elasticity tester, pull the operating handle and fix the handle when the piston ring is compressed to the specified opening space, then adjust the ladder to balance both ends. The corresponding scale of the scale is the elasticity value of the ring. Generally, this measurement is rarely performed. The repairman only needs to feel the elasticity with his hands, that is, whether the outer circle feels "hard" when pinched with his hands.
5. How to Check for Light Leaks: Light leaks refer to the degree to which light can penetrate between the ring and the cylinder wall when the piston ring is installed in the cylinder. When inspecting, place the piston ring horizontally in the cylinder, cover the inner circle of the ring with a circular plate, place a light source under the cylid, then check the light leakage space. It is necessary that there is light leakage space. within 30° at both ends of the piston ring opening space. If there is a light leak, there should be no more than two light leaks from the same piston ring, the total arc should not exceed 45°, and the light leak space should be less than 0.03mm. When the light leakage gap is less than 0.015mm, the arc can be relaxed appropriately, but it should not exceed 120°.
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Disassembly and assembly steps of Wuling automobile generator. Can anyone who knows help answer the question?
Hello, if there is a direction key on the piston of the car, this direction key shows the direction of the piston, which usually refers to the front of the engine. , the piston is installed before the'facility. The piston rings should be arranged in order from top to bottom according to the pressure ring, air ring and oil ring. They should be aligned at 45 degrees and remember to use an adjuster to align them. Third, the piston ring pneumatic ring has a slope. Third, when installing the piston, remember that the pin between the connecting rod and the piston must use a new circlip and tighten the circlip with it. a stirrup. Fourth, be sure to use clean hands in the steel body before installation. Apply engine oil evenly and apply a little engine oil evenly to the piston with the piston ring installed. Then use a clamp tube to insert the piston with the piston. Piston ring installed in the clamp tube. Align it with the steel body and gently tighten it with a hammer. By hitting the steel body, when the trackwe enter the steel body, the connecting rod begins to be connected. Haha, we hope your. The answer will be selected as the best answer!
1) Remove the cylinder head mounting screws. Note that the screws should be loosened crosswise from both ends towards the middle. 2) Remove the cylinder seal and pay attention to the installation direction of the cylinder seal. 3) Turn the engine over and remove the oil pan retaining screws (note that the screws should also be loosened from both ends towards the middle). 4) Remove the oil pan and oil pan gasket. 5) Loosen the primary oil filter fixing screws and disassemble the oil filter, oil pump gear and oil pump. 6) Dismantle the engine piston connecting rod group and rotate the crankshaft so that the pistons of the 1st and 4th engine cylinders are at bottom dead center. 7) Remove the nuts securing the connecting rods of cylinders 1 and 4 respectivelyment, remove the connecting rod bearing caps, pay attention to the connecting rod correspondence marks and put them back in order. 8) Use a rubber hammer or a hammer with a wooden handle to push out the piston rod from cylinders 1 and 4 respectively, catch it at the cylinder outlet with your hand and remove the piston rod. Pay attention to the. direction of piston installation. 9) Reinstall the connecting rod bearing cap, connecting rod bolts and nuts to their original positions. Connecting rods of different cylinders cannot be exchanged with each other. Use the same method to disassemble the piston and connecting rod groups of cylinders 2 and 3. 10) Remove the flywheel set from the engine crankshaft, loosen the flywheel fixing screws and remove the flywheel. The steering wheel is relatively heavy, so pay attention to safety when disassembling. Remove the front and rear crankshaft seal flanges and oil seals.11) Loosen the crankshaft main bearing cap fixing screws from both ends to the middle, and pay attention to the assembly mark and orientation of the main bearing cap and main bearing shells of different cylinders cannot not be exchanged with each other. 12) Raise the crankshaft, return the main bearing cover and seal to their original positions and tighten the mounting screws a little. Pay attention to the positioning of the crankshaft stopper and the installation direction of the opening. General Engine Installation: 13) Install all parts in reverse order of engine disassembly.