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China hydraulic pump manufacturers,
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Increase the fuel pressure, high-pressure injection, to achieve the best atomization, high-pressure pump is the power source for critical uses as jacks, upsetting head, a Zhahua, extruders and other hydraulic devices.
????????High-pressure pump installation sequence is as follows: During the installation of the high-pressure pump being, in order to avoid debris to fall into the machine, all units should cover the perforations. The unit on the basis of anchor bolts buried in between the base and the base, using a pair of wedge pad for correction. Correction shaft and motor shaft concentricity, on the road linking the outer shaft, the allowable deviation 0.1 mm; two coupling plane gap should ensure that 2 to 4 mm, (a small pump to take a small value) gap should be uniform, allowing difference 0.3 mm. After the connected piping and determine the motor direction of rotation, connect the coupling, and then check it again concentric aromatic shaft. After the actual test run the unit 2 to 3 hours, for a final check, if no adverse phenomenon, is considered qualified to install. In the commissioning process, check the bearing temperature and vibration are as follows: Loosen the coupling large, with a horizontal instrument were placed on the electric oil pump shaft and the base, by adjusting the wedge pad, correction unit level, tighten the bolt appropriate to Anti-around. In order to prevent pipeline debris into the pump, to the newly installed pipeline should be installed in the pump glue filter, the effective cross-section should be greater than 2 to 3 times the suction pipe section.
High pressure pumps for direct injection engines, the fuel pressure by the fuel pump to 3--4bar, into the high pressure fuel pump, high-pressure fuel pump output pressure 120--200bar then computer-controlled engine pushed high pressure jet After pressurizing the fuel nozzle spray to these cylinders. By high-pressure direct fuel injection into the combustion chamber, making it completely atomized, achieve full combustion. It works by computer control, precise fuel is injected directly into the combustion chamber, so this is its advantage. Compared to conventional fuel injection system, direct injection system has more game thermodynamic effects. Because the gasoline direct injection system and driving conditions can be accurately controlled fuel injection quantity according to the engine needs, allowing plenty of air and almost complete combustion, thereby enhancing work efficiency. It is in the interests of users, while improving vehicle dynamics, improved fuel efficiency, thereby reducing fuel consumption and reduce carbon dioxide emissions, fuel economy and environmental protection to achieve a double effect I theoretically, direct injection combustion engine has two modes: points layer combustion and homogeneous combustion. In general, the normal running state, the engine is smooth running condition, stratified combustion state, then the state only around the spark plug preferably hydrocarbon mixture is ignited, this time around the fresh air as well as from the exhaust gas recirculation The gas forms a good heat protection, reduce the cylinder wall heat to enhance the thermal efficiency. Greatly reduces fuel consumption and exhaust emissions. Under acceleration running state, the engine operating conditions in a more intense, this time using the homogeneous combustion state, the combustion chamber filled with a homogeneous mixture of oil and gas, complete combustion to provide a strong impetus. Local high-pressure tubing joints abnormal vibration, resulting in oil spills, is quite complex. Due to the high pressure tubing connected to a high pressure pump and injection machine, belonging to the fuel injection system, a very important role.
