The influencing factors of spherical roller bearing friction factor analysis

Bearing durable - at ease Self-aligning roller bearing electricity department author for your explanation: the influencing factors of spherical roller bearing friction factor analysis 1. Surface properties: because of pollution, chemical heat treatment, plating and lubricant, etc. , over the surface of the metal surface to form a layer of thin film ( Such as oxidation film, sulfide film, phosphating film, cadmium chloride film, Gu film, film, aluminum film, etc. ) , make the surface layer and the substrate of different nature. If the surface film on certain actual contact area is still rather than the surface film on substrate materials, at the same time can make the shearing strength of the surface film is lower than the shear strength of substrate material; On the other hand because of the existence of surface film adhesion and are less, so the friction and friction factor can be reduced. Surface film thickness has a great influence on the friction factor also. If the surface of the film is too thin, the film is easy to be crushed by direct contact with the substrate material; If the surface of the film is too thick, on the one hand, due to the membrane soft make real contact area increases, on the other hand, two dual peak on the surface film on the surface of the micro the furrows of the effect is more outstanding. It is clear that there are a surface film deserves to find the best thickness of the ball. 2. Self-aligning roller bearing properties of materials: metal friction pair of friction factor and varies with the nature of the matching material. Generally speaking, the same big metal friction pair metal or solubility, prone to stick, its friction coefficient is larger; On the other hand, the friction factor is smaller. Friction materials with different properties of different structure. If the graphite has the stable layer structure and the bonding force between the small, easy to slide, so the friction factor is small; And diamond match friction pair as the actual contact area due to the high hardness, small and not sticky, the friction factor is lesser also. 3. Temperature: the surrounding medium temperature on the friction factor, the influence of surface layer is mainly due to the nature of the material, which is caused by the change of bowdoin and others test showed that many metals ( Such as molybdenum, tungsten, chin, etc. ) Friction factor, and its compounds in the surrounding medium temperature is 700 ~ 800 ℃ when the minimum value. Appear this kind of phenomenon is make shear strength decreased with initial temperature, temperature rise and make further yield point caused a sharp drop in real contact area increases because of the many. But when polymer friction pair or pressure processing, friction factor with the change of the temperature there will be a great value. 4. Relative motion speed: under normal circumstances, the sliding velocity can cause surface heating and temperature rise, which changes the nature of the surface layer, so the friction factor is bound to change. 5. Surface roughness: in plastic contact condition, because of the effect of surface roughness on the actual contact area is very small, so that friction factor can hardly influenced by the surface roughness. For the dry friction pair of elastic or elastic-plastic contact, when the surface roughness value is very small, mechanical action are smaller, and the molecular force effect is larger; And vice versa. Visible, friction factor along with the change of surface roughness has a minimum. By the visible and the influence of temperature on the friction factor is changeful, due to the specific conditions, material properties, the influence of the change in the oxide film and make the temperature and the relationship between the friction factor becomes very complex. Bearing comfortable and durable, )