Coating material used for preventing locking of engine crankshaft, and preparation method and usage method thereof

Abstract

The invention discloses a coating material used for preventing locking of an engine crankshaft, and a preparation method and a usage method thereof. Raw materials of the coating material are composedof, by weight, PAG polyether base oil, modified plant-based synthetic ester oxidation sunflower seed oil, epoxy resin, organic molybdenum, tungsten disulfide powder, tungsten diselenide powder, graphite fluoride powder, polyphenyl, a flame retardant, an anti-wear agent, and an antioxidant. The coating material is applied to a crankshaft journal surface or / and a bearing surface between a crankshaftjournal and a bearing bush (tile), and can provide adequate lubrication under the condition that effective lubrication cannot be provided due to inferior quality of engine oil or adequate lubricationcannot be provided between a crankshaft and a connecting rod when engine oil reduces; and the coating material can withstand a protective coating that is extremely high in temperature, not easy to wash off and burned out, has excellent waterproof, rust proof, anti-corrosion and anti-fretting wear characteristics on metal parts, can form solid dry film lubrication in the environment above 200 DEGC, can play the role of lubricating and preventing metal sintering from being stuck at a temperature of up to 1400 DEG C, and effectively avoids occurrence of the phenomenon that dry friction is generated between the tile and the crankshaft to eventually lead to the locking between the crankshaft and the connecting rod.

Description

technical field [0001] The invention relates to the field of coating materials, in particular to a coating material used for preventing engine crankshafts from locking. Background technique [0002] The piston and connecting rod mechanism are connected to the crankshaft. The crankshaft bears the pressure generated when the fuel mixture is burned through the piston and the connecting rod, and converts the reciprocating motion of the piston into rotary motion. A sliding part between the crankshaft and the connecting rod is called the bearing bush, which together with the oil forms a sliding bearing. Sliding friction is used between the crankshaft of the four-stroke engine and the big end of the connecting rod. There are two semicircular tiles (that is, bearing bushes) in the big end of the connecting rod. The tiles and the oil together form a sliding bearing. The tiles are made of thin steel sheets, and a friction-reducing alloy layer is cast on the inside of the steel sheet....

AI Technical Summary

Problems solved by technology

Once there is not only no oil between the crankshaft and the connecting rod, but even the friction-reducing alloy layer lubrication is lost, it will cause the crankshaft and the connecting rod to lock up

And when the temperature is too high, the radial radius of the crankshaft increases, and the bearing bush (tile) swells tightly, which is also one of the reasons for the locking between the crankshaft and the connecting rod. In addition, insufficient lubrication caused by poor-quality engine oil is also easy lead to deadlock

[0003] Therefore, what needs to be solved is how to avoid dry friction between the tiles and the crankshaft and eventually cause the crankshaft and the generation of locking phenomenon between the connecting rod