Experimental Evaluation of the Cross Roller Bearing Resistance Moment in Vacuum

IF 0.5 4区工程技术 Q4 ENGINEERING, MECHANICAL Journal of Friction and Wear Pub Date : 2023-08-14 DOI:10.3103/S1068366623020095

M. V. Prozhega, E. O. Konstantinov, E. O. Reschikov, A. Yu. Albagachiev, N. I. Smirnov, N. N. Smirnov

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Abstract—

Roller bearings with crossed rollers are actively used in the swivel mechanisms of manipulators and other units due to the combination of high rigidity and increased load capacity. When designing new mechanisms, an important characteristic is the resistance moment, the value of which can be significantly influenced by operating conditions, such as the environment, the amount and type of lubricant, load, etc. In the presented study, the resistance moment and the friction coefficient of a cross-roller bearing were investigated at various temperatures, pressure in the chamber, load, and amount of lubricant. To test a bearing with crossed rollers of size RA 6008 in the temperature range from –40 to +100°C in vacuum conditions, technological equipment was designed and manufactured, a method for measuring the resistance moment was developed, and a full factorial experiment was carried out to assess the degree of influence of various factors on the resistance moment at a fixed VNIINP-284 (AMETHYST) grease amount. The test results showed that the moment of resistance and the coefficient of friction decrease with an increase in the grease amount from 60 to 230 mg, a decrease in air pressure in the test chamber from 10⁵ Pa to 1.33 × 10^–3 Pa leads to an increase in the friction coefficient and the resistance moment of the bearing, while an increase in temperature operation of a bearing with grease from 25 to 100°С leads to a decrease in the resistance moment and friction coefficient, and a decrease in temperature to –40°C leads to their increase.

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真空中十字滚子轴承阻力矩的实验评定

摘要:具有交叉滚子的滚子轴承由于具有高刚度和增加的承载能力，在机械臂和其他单位的旋转机构中得到了积极的应用。在设计新的机构时，一个重要的特性是阻力矩，其值会受到运行条件的显著影响，如环境、润滑剂的数量和类型、负载等。在本研究中，研究了不同温度、腔内压力、载荷和润滑剂用量下交叉滚子轴承的阻力矩和摩擦系数。为在-40 ~ +100℃的真空条件下测试尺寸为RA 6008的交叉滚子轴承，设计并制造了工艺设备，开发了阻力矩的测量方法，并进行了全因子试验，在固定VNIINP-284 (AMETHYST)润滑脂量下，评估了各因素对阻力矩的影响程度。测试结果表明,抵抗力矩和摩擦系数减少油脂量的增加从60岁提高到230毫克,减少空气压力在测试室从105年球季爸爸1.33×Pa导致增加轴承的摩擦系数和阻力矩,而温度的增加操作的轴承润滑脂从25到100°С导致减少阻力矩和摩擦系数,温度降低到-40°C会导致它们的增加。

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来源期刊

Journal of Friction and Wear ENGINEERING, MECHANICAL-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

1.50

自引率

28.60%

发文量

审稿时长

6-12 weeks

期刊介绍： Journal of Friction and Wear is intended to bring together researchers and practitioners working in tribology. It provides novel information on science, practice, and technology of lubrication, wear prevention, and friction control. Papers cover tribological problems of physics, chemistry, materials science, and mechanical engineering, discussing issues from a fundamental or technological point of view.