Method for improving lubricating property of linear contact fluid under high roll ratio

Abstract

The invention relates to a method for improving the lubricating property of a linear contact fluid under a high roll ratio. The method comprises the following steps of: setting two objects forming reverse shape contact into a contact object I and a contact object II respectively, and controlling the linear speed and the roll ratio value of the surfaces of the contact object I and the contact object II which are practically paired; and coating an oleophilic coating on the contact object I, coating an oleophobic coating on the contact object II, filling lubricating oil between the contact object I and the contact object II, and applying a load of which the highest hertzian contact pressure is not less than 0.5GPa in a linear contact area, so that the lubricating property of the improved linear contact fluid is formed. The method is of an important application value to the linear contact lubrication in gear driving and worm gear driving under high speed, high load and high roll ratio, the friction energy consumption and surface temperature increasing in the mechanical driving lubrication can be greatly reduced, the lubricating state of mechanical driving is greatly improved, the anti-agglutinating capability, the wear-resistant property and the working performance of the surfaces of driving parts are obviously improved, and the service life of the parts is prolonged.

Description

technical field [0001] The invention relates to the field of gear transmission and worm and worm gear transmission, in particular to a method for improving the lubrication of a fluid contacting a line with a large slip-to-roll ratio. Background technique [0002] The lubrication problem is a key technical problem and technical bottleneck in high-speed, heavy-duty, high-power gear transmission, especially in worm gear transmission. It restricts the further improvement of the quality of these mechanical transmissions and restricts the further development of these mechanical transmissions. [0003] The fluid lubrication in gear transmission and worm gear transmission belongs to the off-line contact lubrication with large slip-to-roll ratio. The disadvantage of this kind of lubrication is that it is difficult to form a lubricating oil film, which reduces the bearing capacity of the contact area, increases the friction coefficient, increases energy consumption, and generates heat....

AI Technical Summary

Problems solved by technology

Although these technical means can alleviate the lubrication problems in gear transmission and worm gear transmission, such as making the formed lubricating oil film thicker, reducing the friction coefficient of the contact area, reducing the friction energy consumption and friction heat in the contact area, and making the gear However, they have not fundamentally solved the lubrication problem in these mechanical transmissions, so they cannot overcome the technical bottleneck of lubrication, and cannot greatly improve the lubrication quality of these mechanical transmissions

[0005] The technical problems faced by the contact fluid lubrication with large slip-to-roll ratio are: (1) high shear rate and large shear stress of the lubricating oil film; (2) large friction coefficient in the contact area; (3) large frictional energy consumption in the contact area, The frictional temperature rise is high; (4) The viscosity of the lubricating oil decreases at high temperature, and the bearing capacity of the contact area is significantly reduced; (5) The high temperature in the contact area reduces the shear strength of the contact surface interface of the lubricating oil, causing the lubricating oil film to slip on the contact surface. The bearing capacity of the lubricating oil film in the contact area is greatly reduced; (6) The significant decrease in the bearing capacity of the lubricating oil film in the contact area makes it easier for the two contact surfaces to directly contact, which further increases the friction coefficient of the contact area, and the friction temperature rises further. The oil film is thinner and the interface slip of the lubricating oil film is more serious, so a vicious cycle is formed, which eventually leads to the failure of the lubricating oil film in the contact area, and the sharp rise of the temperature in the contact area, resulting in the failure of bonding and severe wear of the contact surface at high temperature

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