Diesel engine crosshead lubricating oil supply device

Abstract

The invention discloses a lubricating oil supply device for a crosshead of a diesel engine, which comprises a circular flange installed in the middle of the bottom of the cylinder body and provided with a round hole for the piston rod to pass through. One side of the circular flange has a notch surface. The first The oil passage communicates with the notch surface and the end surface of the circular flange away from the cylinder block. One end of the crosshead is connected to the rod head of the piston rod, and the other end is connected to the small end of the connecting rod arranged on the crankshaft. The rod head of the piston rod is provided with a The second oil passage connected with the lubricating oil passage of the crosshead also includes a coil spring tube wound on the piston rod that communicates with the first oil passage and the second oil passage, and an oil pipe that communicates with the first oil passage and the external oil supply pipeline . Helical spring tube structure is adopted, which is simpler in structure than joint hinge tubes and telescopic sleeves; since the total volume of the helical spring tube remains unchanged when compressed and extended, the oil supply pressure in the tube is relatively stable; both ends of the helical spring tube are respectively connected to the French Blue connection, no relative movement occurs at the connection, the seal is more reliable, and there is no leakage.

Description

technical field [0001] The invention relates to a lubricating oil supply device for a crosshead of a diesel engine, in particular to an oil supply device for lubricating a crosshead of a low-speed diesel engine. Background technique [0002] In the low-speed diesel engine bearings, the crosshead is an important part used to connect the piston and the connecting rod. The load of the crosshead bearing is very high and the working conditions are extremely harsh. The movement between the crosshead pin and the bearing is a swing, and the swing angle is very small, and the angular velocity is not large, especially at the top and bottom dead center positions of the piston, the angular velocity is zero, so it is not like the high-speed rotating shaft and the bearing. It is as easy to form and maintain the necessary hydrodynamic oil film as it is in between. In addition, for two-stroke low-speed diesel engines, since the load on the crosshead bearing is basically continuous downward...

AI Technical Summary

Problems solved by technology

Although the structure of the oil supply device is relatively simple, the telescopic tube connected to the slider reciprocates up and down with the crosshead, so that the volume inside the tube changes with time, resulting in unstable oil supply pressure in the tube

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