alternator introduce

Generators are mechanical equipment that converts other forms of energy into electrical energy. They are driven by water turbines, steam turbines, diesel engines, or other power machinery, which convert the energy generated by water flow, airflow, fuel combustion or nuclear fission into mechanical energy and transmit it to the generator. The generator is then converted into electrical energy. Generators have a wide range of applications in industrial and agricultural production, national defense, technology, and daily life. There are many forms of generators, but their working principles are based on the laws of electromagnetic induction and electromagnetic force. Therefore, the general principle of their construction is to use appropriate magnetic and conductive materials to form magnetic circuits and circuits that conduct electromagnetic induction with each other, in order to generate electromagnetic power and achieve the purpose of energy conversion. Generators are usually composed of stators. The rotor is composed of rotor, generator (Figure 2) end cover, bearings, and other components. The stator is composed of stator core, wire wrapped winding, machine base, and other structural components that fix these parts. The rotor is composed of rotor core (or magnetic pole, magnetic choke) winding, protective ring, central ring, sliding ring, fan, and shaft. The stator and rotor of the generator are connected and assembled by bearings and end cover, allowing the rotor to rotate in the stator, The motion of cutting magnetic lines of force generates induced electromotive force, which is led out through wiring terminals and connected to the circuit to generate electric current. The diesel generator is driven by the diesel engine, and the generator (Figure 4) converts the energy of diesel into electrical energy. In the cylinder of the diesel engine, clean air filtered by the air filter is fully mixed with high-pressure atomized diesel injected by the fuel injector. Under the compression of the piston upward, the volume shrinks and the temperature rapidly increases, reaching the ignition point of diesel. Diesel is ignited, and the mixed gas burns violently. The volume rapidly expands, pushing the piston downward, which is called "work". The gasoline generator is driven by the gasoline engine, which converts the energy of gasoline into electrical energy. In the cylinder of the gasoline engine, the mixed gas burns violently, causing the combustion of the mixture. The volume rapidly expands, pushing the piston down to do work. Whether it is a diesel generator or a gasoline generator, each cylinder works in a certain order, and the thrust acting on the piston is converted into the force that drives the crankshaft to rotate through the connecting rod, thereby driving the crankshaft to rotate. By coaxially installing the brushless synchronous AC generator with the crankshaft of the power machine, the rotor of the generator can be driven by the rotation of the power machine, Using the principle of electromagnetic induction, the generator will output induced electromotive force, which can generate current through a closed load circuit)

Installation method of generator/generator assembly

Disassembly and assembly of automotive silicon rectifier generator 1. Inspection before disassembly (1) Clean the exterior of the generator; (2) Hand held pulley test for axial and radial clearance of bearings before testing; (3) Rotate the rotor and check for bearing resistance, noise, and any friction or abnormal noise between the rotor and stator. When significant resistance is found, remove the brush and try again to determine whether the resistance comes from the brush or the bearing; (4) Rotate the rotor shaft to visually inspect the runout of the pulley to determine if the rotor shaft is bent; (5) Check for cracks and damage in the casing, hanging feet, and other parts. 2. Disassemble the silicon rectifier generator. (1) Remove the rear bearing cover and oil seal, and unscrew the rotor shaft fastening nut; (2) Remove the fastening screws of the front and rear end covers to separate the front end cover with the rotor from the rear end cover with the stator, and make the same mark on the front and rear end covers and the stator core for easy reassembly; (3) Remove the fastening nut of the pulley, remove the pulley, fan, and half round key, separate the rotor from the front cover, and be careful not to pull the stator coil lead wire off; (4) Remove the front bearing cover and take out the front bearing; (5) Remove the protective cover from the rear cover; (6) Remove the connecting nut between the stator coil wire end and the neutral wire end on the component board, separate the stator from the component board (heat dissipation plate), and remove the stator assembly; (7) Remove the nuts securing the component board assembly and the armature terminal on the rear cover, and remove the component board assembly. 3. Assembly of the generator. (1) First, add No. 1-3 composite calcium based grease to the bearing, but the amount of grease filled in the bearing should not be too much to avoid overflow and splashing on the slip ring, causing poor contact of the electric brush; (2) Assemble the bearings of the front and rear end covers separately (201 # 203 #); (3) Install the rectifier component board onto the rear cover (do not miss the insulation pad); (4) Install the stator assembly onto the rear end cover and connect it to the rectifier component board (the four wiring terminals on the stator winding should be natural and not forcefully pulled or folded to avoid rotor scratches); (5) Install the rotor assembly onto the stator and rear end cover; (6) Combination connection of front and rear end covers (note that the nut of the connecting bolt is facing the fan, and the connecting bolt should be tightened diagonally. While tightening, rotate the rotor to check if it scratches the stator, so as to avoid burning the rotor and stator. If there is a phenomenon of rotor scraping the stator, use a wooden hammer to strike the generator casing for adjustment); (7) Assemble the half round key, fan, pulley, and rotor shaft front and rear fixing nuts; (8) Assemble the brush holder assembly (note that the position of the brush holder and the copper slip ring on the rotor shaft should be aligned, and one brush should not eat two slip rings, which will prevent power generation); (9) The assembled generator should rotate flexibly, without any jamming, scraping or collision sounds, and the rotor shaft should not have any movement

BMW 6 Series introduce

The BMW 6 Series is a car specially designed by BMW Germany for sophisticated drivers. It was introduced in 1976 and discontinued in 1989. During this period, its sales reached 86000 units, making it the most successful box car in BMW's history After a 14 year hiatus, BMW decided to revive the 6 Series and once again enter this large luxury sports car market, showcasing the core concept of the BMW 6 Series in GT racing, combining the advantages of sports cars and luxury RVs The previous models of BMW's sporty two door cars have also perfectly achieved this integration. In terms of exterior design, the 6 Series maintains the typical dynamic style of BMW Coupe, with a long hood, low roof lines, and front and side skirts giving the car a dynamic and elegant posture. To distinguish it from other models, the headlights, engine cover, radiator grille, and front air vents have all been redesigned. By introducing new elements such as LED brake lights in the tail light design, in addition to greatly reducing reaction time, the size and brightness can be adjusted according to different environments. The BMW v8 engine provides power for the 6 Series. BMW is known for its advanced technological development, and a series of LED brake lights have been introduced. The application of high-tech projects has maintained BMW's leading position in the automotive industry. The 6 Series has also adopted many advanced scientific research achievements. The new 6 Series has a body length of 4820mm and a width of 1800mm, which is even wider than the 5 Series. Such a large body shape will inevitably increase the weight of the body, and excessive body weight will greatly affect the acceleration and handling of the 6 Series. Therefore, BMW has used a large amount of aluminum alloy and composite materials on the body of the 6 Series, In order to achieve the goal of reducing weight, carbon fiber reinforced plastic materials are 50% lighter than steel and 35% lighter than aluminum, which can effectively reduce the weight of the vehicle body. The rigidity is three times that of other materials in the central control area (10 sheets), and the collision resistance and safety are quite good, which has always been an ideal material for the automotive industry. However, due to the lack of stamping equipment, carbon fiber used to be produced manually. BMW has developed a set of stamping equipment with a self weight of 200 tons and a pressure of 1800 tons, which is the world's first mass-produced carbon fiber roof, and has begun trial use on the new 6 series. The 6 series also uses an overhead display (hud) system that is only available on aircraft, which can directly display some important information. Projected onto the windshield of the car, including navigation direction, speed, and active cruise control display. The core functions related to driving in the car are operated through the i-drive controller and buttons attached to the steering wheel, but the i-drive control button is placed on the right side of the gear lever and requires arm extension to reach. Other secondary functions and comfort equipment control are arranged in a distance that is easily accessible to the other (2) cars and front seat passengers, Very convenient. Users can also choose a panoramic glass roof that is much larger than a regular electric sunroof, allowing more sunlight to enter the luxurious interior of the car. Dynamic driving and active steering systems are optional equipment for the 6 Series, which can greatly eliminate the body roll caused by vehicle turning and increase the comfort of passengers inside the car. The active steering system, on the other hand, changes the steering ratio based on the vehicle speed through a stepper motor. At lower speeds, the steering sensitivity increases, and larger wheel turns can be achieved by turning the steering wheel at a smaller angle. This situation is very useful for drivers driving on urban roads or parking and turning around. As the speed increases, the steering becomes more sensitive. Accurate, ensuring driving stability and comfort. The BMW 6 Series engine is equipped with Dynamic Stability Control (DSC) and Dynamic Traction Control (DTC) systems. In addition, the Driving Dynamics Control (DDC) technology used in the BMW M3 and M5 models is also used in the new 6 Series, which is controlled through a "SPORT" button located on the center console The DDC function can increase the sensitivity of the throttle response, improve acceleration ability, and provide a more direct response to the power assisted steering mechanism, thereby increasing the driving pleasure of the driver. In terms of power, there is also the option to choose a sequential manual transmission (SMG), which can be changed by the paddles on the steering wheel or the gear lever. As for the interior, we have always trusted BMW. The 6 Series adheres to BMW's consistent style, perfectly combining luxury and practicality. The bright colors are more in line with its sporty characteristics, and there are multiple configurations to choose from. As a representative of luxury cars, the BMW 6 Series [2] also has many commendable features. In terms of sound configuration, the new BMW 6 Series is equipped with 8 features. A hi fi sound system with speakers, 9 space seats, and 6 CDs create a home theater effect