Tractor three-purpose lubricating oil composition and preparation method of tractor three-purpose lubricating oil composition

Abstract

The invention relates to a tractor three-purpose lubricating oil composition, which comprises (a) at least one mineral base oil with higher viscosity index; (b) at least one viscosity index improving agent; (c) at least one pour inhibitor; (d) at least one EP-antiwear additive; (e) at least one antioxidant; (f) at least one friction improving agent; (g) at least one clean dispersing agent; (h) at least one antirust agent; (i) at least one anti-foaming agent. The tractor three-purpose lubricating oil composition has excellent high-low-temperature performance, thermal oxidization stability, EP-antiwear performance, anti-corrosion performance, anti-rust performance and anti-emulsification anti-foaming performance, can meet the requirements of a general hydraulic system, a transmission system and a braking system of a large-and-middle-sized tractor and engineering machinery, can realize the comprehensive lubrication protection on the hydraulic and gear transmission, power output and braking components; long service life is realized; the improvement of the operation stability of the equipment is facilitated.

Description

technical field [0001] The invention relates to a lubricating oil, in particular to a tractor three-purpose lubricating oil composition and a preparation method thereof. Background technique [0002] For the lubricating oil used in agricultural tractors, the early tractor chassis had a simple structure, and most of them were driven by general gears, and the tractor horsepower range was small, so APIGL-4 grade vehicle gear oil was mainly used. With the rapid development of medium and high horsepower tractors, With the development and upgrading of tractor chassis technology, most modern tractors use power shift transmission, meshing sleeve shift, clutch shift and wet brake device, etc. At the same time, the chassis space is more compact, so that each system of the tractor must share a fuel tank , so the oil must have better extreme pressure performance and friction performance, not only to meet the lubrication protection of gear transmission and hydraulic system, but also to m...

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Problems solved by technology

[0003] The development of lubricating oil for tractors in my country started relatively late, and the quality of oil used by various domestic tractor companies is uneven, mainly based on the N100D transmission and hydraulic dual-purpose oil developed in the 1980s. And the development and use of power shift gearboxes and CVT continuously variable transmissions have made N100D hydraulic transmission dual-purpose oil unable to meet the requirements of today's tractor system lubrication. In addition to requiring oils with good high and low temperature performance, thermal oxidation stability, and load bearing It also requires the oil to have certain friction characteristics, increase the smoothness of shifting, reduce tractor braking noise, and prolong the service life of equipment

[0004] So far, there is no ideal three-purpose lubricating oil composition for tractors

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