How to choose the bearing type
发布时间:2019-03-06 09:22:25
Generally speaking, the choice of bearing steps may be summarized as:
1. According to the bearing working conditions (including the type of load direction and load, speed, lubrication way and the orientation of coaxial degree requirements, or not, installation and maintenance, environment temperature, etc.), choose the basic type, tolerance grade, and bearing clearance;
2. According to the working conditions of the bearing and force situation and life requirements, through the calculate and determine the bearing type, or according to the demands of the selected bearing model, calculating the life again;
3. The calculation of the selected bearing load rating and extreme speed.
Choose bearing limit rotational speed is the main factor, dacron life and load capacity, other factors help determine bearing type, structure, size and tolerance grade and clearance for the final solution.
1. The type selection
All kinds of rolling bearing with different characteristics, suitable for different usage of various kinds of machinery. Choosing a bearing type,
Usually the following factors should be considered. : generally choose when to withstand a load thrust thrust bearings, angular contact bearings for high speed applications typically use ball bearings, under heavy radial load, using roller bearing. In a word, using personnel from different manufacturers, many of the bearing products, choose the appropriate type.
• bearing of machinery space and location
In mechanical design, generally make sure of the size of the shaft, then choose rolling bearing according to the size of the shaft. Using ball bearing is usually small axis, the axis selects roller bearings. However, when the diameter of the bearing in the machine direction is restricted, choose needle roller bearing, special light and ultra light series of ball or roller bearings; When the bearing in the axial position of the machine is restricted, can choose a narrow, narrow range of ball or roller bearings.
• bearing the load size, direction and nature
The most important factor of load is bearing. Roller bearing is used to carry heavy load, the ball bearing used in light or medium under load, carburizing steel bearing manufacturing or bainite hardening, can withstand the shock and vibration load.
In the direction of the load, under pure radial load, can choose deep groove ball bearings, cylindrical roller bearing or needle roller bearing. Small pure axial load, can choose the thrust ball bearings; Under high pure axial load, can choose thrust roller bearings. When load bearing radial and axial, angular contact ball bearing is generally selected or tapered roller bearing.
, the bearing performance
When the shaft centerline is different from the center line of the bearing seat, Angle error, or because of the axis of two supporting spacing of larger axial rigidity with smaller, easily bend or tilt, can choose good self-aligning properties of self-aligning ball or spherical roller bearings, as well as outside of the ball bearing. Such bearing on the shaft bent slightly tilted or circumstances, to maintain a normal work.
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