The factory teaches you how to adjust the sewage suction pump
Vacuum squeegee cavitation is a honeycomb cavity that appears on the surface of a part after working for a certain period of time. When the area and depth of the cave develop to a certain degree, parts will lose their working efficiency. Although it is not a major factor affecting the life of the fuel injection system, it should also cause hazing. The following parts are prone to cavitation. High-pressure pipeline. When the pressure in the tubing drops sharply, bubbles are likely to form and cavitational erosion occurs on the inner wall of the tubing. Therefore, an appropriate oil valve should be fitted. The plunger sleeve is flush with the oil drain screw at the oil hole. Outside the oil return hole of the P-type pump plunger sleeve, there is a loose, hardened steel oil retaining ring, also to prevent cavitation. Column cold and plunger sleeve. Using a plunger with a stepped, wedge or wedge spiral groove, such a shape can control the pressure characteristics of the unloading process, thereby reducing pressure fluctuations in the winding. A special groove or additional special hole is provided below the oil return hole on the inner surface of the plunger sleeve to prevent cavitation.
The vacuum suction truck changes the shape and direction of the oil return hole, and can change the state of the oil flow during the oil unloading process, thereby eliminating the cavitation phenomenon near the oil hole, the plunger surface and the oil hole. Injector body and injector. The use of a slit filter on the injector can reduce or prevent cavitation in the injector. The double-cone needle valve also relieves the degree of cavitation erosion by the mouth J. This needle valve has been widely used. Outlet valve sealing washer. The use of soft copper gaskets can reduce the cavitation erosion. Some injection pump outlet valves cooperate with the top surface of the oil discharge valve fixing seat, thus eliminating the seal gasket and fundamentally eliminating the cavitation erosion phenomenon.
For a new fuel injection pump or a newly commissioned fuel injection pump for a vacuum suction truck, the drive bolts on the coupling can be loosened and removed, and then the camshaft can be rotated along the working direction of the camshaft of the injection pump to make the fuel supply on the injection pump. The timing plate is aligned with the fuel supply automatic regulator and the final tightening of the drive bolts. For the old fuel injection pump, due to varying degrees of wear of the various components, the timing of fuel supply to the reference cylinder (first cylinder) has changed. That is, after the fuel supply timing plate and the oil supply automatic regulator are aligned with each other, the first cylinder oil pipe connector has no movement. So you cannot use the first method to adjust.
The vacuum sewer truck should turn the crankshaft to align the flywheel and the oil supply scribing line on the flywheel housing, and the fuel injection pump timing mark is in the same direction. Remove the drive bolt on the coupling, remove the high pressure fuel pipe on the first cylinder, push the throttle control arm to the maximum fuel supply position, and rotate the camshaft along the working direction of the injection pump to the oil surface in the first cylinder oil pipe connector. Move to the end, finally install the drive bolts and tighten. After the advancement angle of fuel supply is adjusted, the diesel engine shall be started, and the early or late start time of fuel supply shall be judged according to the operating conditions (stability of operation, sound emitted, and smoke emission), and adjusted empirically. Loosen the drive bolts on the coupling and rotate the camshaft of the fuel injection pump properly (if it is too late, it should be turned in the direction opposite to the camshaft; if it is too early, it should be turned in the direction of the camshaft).
Consult the image of the sewage suction truck, the price of the sewage suction truck, the function of the sewage suction truck, and the use of the sewage suction truck.
Hubei Cheng Li Special Purpose Vehicle Co., Ltd., Sales Manager Chen Xin, Contact Tel: Welcome to visit us!
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