Welding repairs on diesel generator steel workpieces are mainly for repairing cracks and compensating for wear dimensions. Due to the wide variety of steels, various elements contained in the weld will have a certain influence on the weld repair, so the weldability varies greatly. Among them, the change in carbon content is the most significant. Low carbon steel and low carbon alloy steel have less tendency to harden during weld repair and have good weldability; weldability decreases with increasing carbon content
Aluminum and aluminum alloy aluminum oxide is easier to oxidize than copper. It forms a dense and refractory alumina film with high melting point. It is difficult to melt during welding, hindering the fusion of matrix metal, easily causing weld metal slag, reducing mechanical properties and resistance. Corrosive; aluminum has a large gas absorption, liquid aluminum can dissolve a large amount of hydrogen, when it is rapidly cooled and solidified, hydrogen can not be precipitated, and pores are easily generated
The function of the generator set radiator is to dissipate the heat carried by the cooling water into the atmosphere to lower the temperature of the cooling water. The heat sink must have sufficient heat dissipation area and be made of a material with good thermal conductivity. Its structure is shown in Figure 1(a). It consists of a water tank (some with air-steam valves), a core and a drain tank. composition. The upper and lower water tanks are used to store cooling water, and a water inlet for injecting cooling water is opened at the top of the upper water tank, and the water tank cover is closed.
Diesel generator valve drive is mainly composed of camshaft, timing gear, tappet, push rod, rocker arm and rocker shaft. The function of the valve train is to open and close the intake and exhaust valves at a specified time (gas timing) and order (fire order), and to ensure a certain degree of opening.
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