Whole working condition composite-structure sliding bearing

Abstract

The invention belongs to the technical field of sliding bearings, and discloses a whole working condition composite-structure sliding bearing. The sliding surface of the sliding bearing is provided with a triple composite texture; the three-layer composite texture comprises pit sets which are uniformly distributed in the sliding surface of the sliding bearing, and each pit set comprises a first pit, a second pit and a third pit; the first pits have the characteristics of being small in diameter and large in depth, and are suitable for the low-speed heavy-load working condition and capable of achieving the noise lowering and vibration reducing effects; the second pits have the characteristics of being large in diameter and small in depth, and is suitable for high-speed low-load working condition and capable of enabling the bearing to be in the dynamic pressure lubricating state more easily; and the third pits have the characteristics of being moderate in diameter and depth, is suitable for the medium-speed medium-high-load working condition and is used for transiting the suddenly-changed working condition within a short time and stabilizing the working state. According to the whole working condition composite-structure sliding bearing, the reasonable triple composite texture is designed on the sliding bearing, accordingly, the comprehensive performance of the sliding friction pair structure is improved, the friction coefficient and the wear rate are effectively decreased, oil film forming is accelerated, the carrying capacity and the abrasion resistance are improved, and the service life is prolonged.

Description

technical field [0001] The invention relates to the technical field of sliding bearings, in particular to an all-working-condition composite sliding bearing. Background technique [0002] The friction pair structure is an important structural form of rotating machinery, which directly affects the safety and stable operation of the equipment. With the development of various working machinery towards heavy load, precision and high speed, the requirements for the friction pair structure are constantly increasing. Machining regular topography (also known as surface texture) on the surface of the structure is an important technical means to improve the friction and lubrication performance. The traditional friction pair structure is suitable for high-speed, medium-low load conditions, and there are defects such as the increase of the friction coefficient under the high-speed and heavy-load conditions, the increase of heat generation, thermal deformation of the friction pair struct...

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Problems solved by technology

[0004] The invention focuses on solving the technical problems of wear resistance, vibration and noise reduction, and strength of the friction pair structure, and overcomes the fact that the friction pair structure with a single texture only acts on a specific working condition, and the friction under high-speed alternating loads in all working conditions Due to the disadvantages of severe wear, increased heat generation and easy failure of the oil film, a reasonable multiple texture is designed on the sliding bearing, so as to improve the comprehensive performance of the sliding friction pair structure, effectively reduce the friction coefficient and wear rate, accelerate the formation of the oil film, and increase the bearing capacity ability, wear resistance, and service life, and finally obtain a full-working-condition composite structure sliding bearing with strong wear resistance, low friction coefficient, good noise reduction and vibration reduction performance, and high load capacity

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