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/*728*90 created on 2018/5/16*/ var cpro_id = "u3440131"; Home>Bearing knowledge>Selection of bearing data Selection of bearing information
The selection of bearing data is carried out by the designer according to the bearing condition and the functional requirements of the bearing parts. The rolling bearing is mainly composed of the ferrule; the rolling body; the holding frame and other parts; the parts and materials can be divided into: /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';
(1) ferrule and roll body data,
(2) adhere to the information,
(3) Other parts such as rivets; dust cover; sealing ring and other information.
The materials used in the above-mentioned parts are various; because they are different in physical and mechanical functions; therefore, they have different characteristics; they are used in different working conditions and environments. The selection of bearing materials is appropriate or not. It is related to whether it can satisfy the function and application requirements of the organization; it has a decisive influence on the bearing operation function and the fatigue life. Usually, the data is selected correctly; only cooperation and installation, smoothness and protection are normal; the bearing will be obtained. Outstanding work function and satisfactory reliability.
Here is a brief description of the bearing ferrule, rollover and the use of the data back.
1. For ferrules and tumbling materials (1) High carbon chrome bearing steel Most bearing ferrules and tumbling bodies are made of special steel. High carbon chrome bearing steels (GCr15 and GCr15SiMn and ZGCr15 and ZGCr15SiMn) are used to make ferrules. Rolling body; the hardness of its parts is as follows:
The ferrules and rollers made with GCr15 and ZGCr15 data are HRc61~65; the steel balls are HRc62~66.
The ferrules and rollers made of GCr15SiMn and ZGCr15SiMn data are HRc60~64, and the steel balls are HRc60~66.
Bearings made of high carbon steel chrome bearing steel are generally suitable for operating temperatures of -40 to 130 degrees; oil and grease are smooth and normal. Satisfied with the usual mechanical requirements.
High carbon chromium bearing steel bearing parts after high temperature backfire; its customary operating temperature can be as high as 250 degrees.
Follow the progress of exercise skills; high-carbon chrome bearing steel can use different training methods; such as vacuum training skills can greatly change the quality of steel; especially the oxygen content in steel and its non-metallic inclusions Significant reductions. Bearings made from this high carbon chrome bearing steel; their fatigue life can be multiplied.
According to many experimental data, the GCr15, GCr15SiMn, ZGCr15, ZGCr15SiMn bearing steels are made in different training methods.
(2) Ferrules and rolling bodies made of carburized bearing steel for carburized bearing steel; the hardness is: HRc60~64 for ferrule and rollover; usually suitable for working temperature of -40~140 degrees Celsius; oil It is smooth and normal with grease; it can be used under large shock oscillation conditions; such as bearings for rolling stock and rolling mills; but the heat treatment process of this steel is more complicated.
(3) The tumbling body of the ferrule made of heat-resistant bearing steel for heat-resistant bearing steel; its hardness: HRc60~64 for ferrule and roller; HRc61~65 for steel ball; under smooth and normal condition; suitable for operation The temperature is 120~250 degrees Celsius; such as aeroengine, gas turbine and other spindle operating conditions.
(4) Corrosion-resistant bearing steel is made of corrosion-resistant bearing steel to make ferrule and roll; its hardness is: ferrule and roll body should not be lower than HRc58; suitable for corrosive medium such as water, nitric acid, chemical reagent; temperature is - 253~350 degrees Celsius.
2. Adhere to the use of materials (1) most of the bearings are selected steel brackets; the most widely used is low carbon steel stamping wave shape, basket shape, box shape and other support frame; suitable for bearing with high carbon chromium bearing steel Conditions and environment, the brackets stamped with medium carbon stainless steel plates are suitable for bearing conditions and environment with corrosion-resistant bearing steel.
(2) Excellent surface quality with non-ferrous metals. Work under high temperature conditions; silicone bronze can be used to make solid frame; operating temperature can reach 315 degrees Celsius, because aluminum is lower in strength than brass; lighter in weight; therefore commonly used aluminum The generation of brass fabrics adheres to the frame; the first application is for high speed, light weight, corrosion resistance and other working conditions.
(3) The use of engineering plastics to make the frame; these years have been carried out; the first is because it has a certain corrosion resistance; self-smooth function; friction resistance. The vertebral tossing is not the worst. The reinforced nylon 66 currently used is the most widely used; it can continue to operate at a temperature scale of -40 to 120 degrees Celsius.
PTFE has high strength; self-smoothing function is good; continuous operation temperature can reach 300 degrees Celsius; phenolic adhesive tape has high mechanical strength; outstanding wear-resisting and heat-resisting function; but costly; suitable for high-speed rotation; operating temperature It is -40~150 degrees Celsius; instantaneous can be as high as 180 degrees Celsius.
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Selection of bearing information
Source: China Bearing Network Time: 2014-02-27