Mute pumps are mainly used for water treatment, environmental protection, medical treatment, industrial control, scientific research laboratories, etc., which are required to meet the needs of small size, low noise and low power consumption, and can be widely used for lifting, transferring, pressurizing, spraying, spraying and water recycling , Transportation and other purposes. Although some miniature pumps also have self-priming capability, the maximum height of self-priming actually means that the height of water can be raised after "adding priming", which is different from "self-priming" in the true sense. Such as the subject of self-priming suction of 2 meters, the actual only 0.5 meters; and mini self-priming pump BSP27250S is different, its self-priming height of 5 meters, without diversion case, you can pump below 5 meters The water pumped up. And the volume is small, is the real sense of the "miniature self-priming pump", and the noise is quite small, the basic can be called a quiet pump.
Second, Cheng Chong and four-stroke engine work Principle A, two-stroke engine work principle the piston from the bottom stop to the top stop movement, it will complete the intake and compression process, the first stroke of reciprocating piston motion. The piston moves from the top dead center to the bottom dead center, it will complete the combustion expansion (work) and the exhaust working process, belongs to the piston reciprocating movement second stroke. When the piston moves from bottom to top and all vents and vents are closed, the exhaust and ventilation process is terminated and the fresh combustible mixture in the cylinder will begin to compress. At the same time, as the piston moves up, the capacity of the crankcase under the piston gradually increases, which causes the pressure in the crankcase to drop and forms a vacuum. When the vacuum of the crankcase reaches a certain degree, the reed valve automatically opens, the combustible mixture atomized by the carburetor is sucked into the crankcase. As the piston continues its upward motion, it will be near the TDC when an electric spark from the spark plug ignites the compressed combustible mixture. At this time the burning gas rapidly expand, so that the temperature and pressure of the combustion chamber rise sharply, forcing the piston down movement, piston that is through the connecting rod, crankshaft for useful work. When the piston moves from the top stop to the bottom stop, the pressure in the crankcase will increase with the decrease of the volume, and the reed valve will gradually close automatically. As the piston descends to the vent opening, exhaust gases are discharged into the atmosphere through the vent, the exhaust pipe, and the silencer. When the piston continues down to the vent opening, the precompressed fresh combustible mixture in the crankcase enters the cylinder through the vent and drives the exhaust gas in the cylinder to further discharge, this process is called scavenging. The engine then completes a working cycle. 4-stroke b, principle of four-stroke engine the first stroke -- intake stroke: When the piston is at a specified crank angle just before TDC, the intake valve opens and the combustible mixture is sucked into the cylinder. When the piston moves from the top dead center to the bottom dead center, the exhaust valve closes at a specified crankshaft angle at the top dead center, and the cylinder volume above the piston increases, make the cylinder to form a degree of vacuum mixture to continue through the intake valve intake intake. The intake valve closes when the piston reaches a specified crank angle after the BDC, at which point the intake process is completed. The second stroke-compression stroke: the piston from the bottom stop to the top stop movement, when the intake process is finished, the intake valve and the exhaust valve are closed, this time the cylinder's flammable mixture is compressed. On the compression stroke, when the piston moves up to a specified crank angle before the top dead center, a spark will be generated between the spark plug electrodes, which will be ignited by the compressed combustible mixture. The burning combustible mixture causes the temperature and pressure in the cylinder to rise rapidly, and the piston moves from the top dead center to the bottom dead center under the action of the high temperature and high pressure, and the connecting rod drives the crankshaft to rotate for useful work. The fourth stroke-exhaust stroke: in the combustion expansion stroke, when the piston to the lower stop before a specified crankshaft angle, exhaust valve open, exhaust gas through the exhaust valve began to discharge. The crankshaft continues to rotate and pushes the piston from the bottom to the top. Push the exhaust gas out of the cylinder. This exhaust process is terminated when the exhaust valve is closed at a specified crankshaft angle after the piston line has reached TDC.
Motorcycle power devices are used in the internal combustion engine; people use diesel-fuel engine is known as the diesel engine, and the use of gasoline-fuel engine is known as gasoline engine. Because of the advantages of light weight, small volume, low noise, low vibration, easy starting and low cost, gasoline engine is widely used as its power device.
Two-stroke and four-stroke engine two-stroke engine for two-stroke engines and four-stroke engine: That is, the piston up and down reciprocating movement of two strokes to complete a work cycle of the engine. Four-stroke engine: where the engine crankshaft every rotation, that is, the piston up and down four-stroke reciprocating movement to complete a work cycle of the engine. Working cycle is the engine by the intake, compression, combustion expansion (work) , exhaust stroke composed of the work process. The process by which an engine completes one intake, compresses, works, and exhausts is called a work cycle, also known as a cycle.
Second, Cheng Chong and four-stroke engine work Principle A, two-stroke engine work principle the piston from the bottom stop to the top stop movement, it will complete the intake and compression process, the first stroke of reciprocating piston motion. The piston moves from the top dead center to the bottom dead center, it will complete the combustion expansion (work) and the exhaust working process, belongs to the piston reciprocating movement second stroke. When the piston moves from bottom to top and all vents and vents are closed, the exhaust and ventilation process is terminated and the fresh combustible mixture in the cylinder will begin to compress. At the same time, as the piston moves up, the capacity of the crankcase under the piston gradually increases, which causes the pressure in the crankcase to drop and forms a vacuum. When the vacuum of the crankcase reaches a certain degree, the reed valve automatically opens, the combustible mixture atomized by the carburetor is sucked into the crankcase. As the piston continues its upward motion, it will be near the TDC when an electric spark from the spark plug ignites the compressed combustible mixture. At this time the burning gas rapidly expand, so that the temperature and pressure of the combustion chamber rise sharply, forcing the piston down movement, piston that is through the connecting rod, crankshaft for useful work. When the piston moves from the top stop to the bottom stop, the pressure in the crankcase will increase with the decrease of the volume, and the reed valve will gradually close automatically. As the piston descends to the vent opening, exhaust gases are discharged into the atmosphere through the vent, the exhaust pipe, and the silencer. When the piston continues down to the vent opening, the precompressed fresh combustible mixture in the crankcase enters the cylinder through the vent and drives the exhaust gas in the cylinder to further discharge, this process is called scavenging. The engine then completes a working cycle. 4-stroke b, principle of four-stroke engine the first stroke -- intake stroke: When the piston is at a specified crank angle just before TDC, the intake valve opens and the combustible mixture is sucked into the cylinder. When the piston moves from the top dead center to the bottom dead center, the exhaust valve closes at a specified crankshaft angle at the top dead center, and the cylinder volume above the piston increases, make the cylinder to form a degree of vacuum mixture to continue through the intake valve intake intake. The intake valve closes when the piston reaches a specified crank angle after the BDC, at which point the intake process is completed. The second stroke-compression stroke: the piston from the bottom stop to the top stop movement, when the intake process is finished, the intake valve and the exhaust valve are closed, this time the cylinder's flammable mixture is compressed. On the compression stroke, when the piston moves up to a specified crank angle before the top dead center, a spark will be generated between the spark plug electrodes, which will be ignited by the compressed combustible mixture. The burning combustible mixture causes the temperature and pressure in the cylinder to rise rapidly, and the piston moves from the top dead center to the bottom dead center under the action of the high temperature and high pressure, and the connecting rod drives the crankshaft to rotate for useful work. The fourth stroke-exhaust stroke: in the combustion expansion stroke, when the piston to the lower stop before a specified crankshaft angle, exhaust valve open, exhaust gas through the exhaust valve began to discharge. The crankshaft continues to rotate and pushes the piston from the bottom to the top. Push the exhaust gas out of the cylinder. This exhaust process is terminated when the exhaust valve is closed at a specified crankshaft angle after the piston line has reached TDC.
car engine,motorcycle engine assembly, 450cc,250cc
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