Method for calculating ultimate bearing capacity of ball bearing under action of combined load
A technology of carrying capacity and combined load, applied in ball bearings, design optimization/simulation, special data processing applications, etc., can solve the problems such as the inability to consider the effect of speed conditions and combined loads, and achieve strong versatility and wide applicability. Effect
Active Publication Date: 2021-12-07
NORTHEASTERN UNIV
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Problems solved by technology
The traditional method cannot consider the effects of speed conditions and combined loads, so a method for calculating the axial and overturning ultimate bearing capacity of ball bearings under combined loads and arbitrary speeds is proposed
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[0110] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0111] 1. In order to obtain the axial or overturning limit bearing capacity of deep groove ball bearings under specific working conditions, the initial axial force F should be given in advance z or overturning moment Mx / y .
[0112] 2. According to the specific step size ΔF z or ΔM x / y , the axial force or overturning moment is gradually updated from small to large until the ball exceeds the raceway rib.
[0113] 3. Set the step size ΔF z or ΔM x / y Halve, repeat the process until the step size is less than the precision value ε ΔF or ε ΔM .
[0114] 4. When the ball just does not exceed the raceway rib, the calculated axial force or overturning moment is the axial or overturning limit bearing capacity of the ball bearing.
[0115] Taking SKF6011 deep groove ball bearing as the research object, Table 1 gives the detailed geometric an...
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The invention belongs to the technical field of mechanical design, and relates to a method for calculating ultimate bearing capacity of a ball bearing under the action of combined loads. According to the invention, initial axial force or overturning torque is given in advance, and the axial force or the overturning torque is gradually updated according to a step length from small to large until a contact ellipse climbs over a rib; then the step length is halved, and the process is repeated until the step length is smaller than a set precision value; and when the contact ellipse just does not climb over the rib, the obtained axial force or overturning torque is axial or overturning ultimate bearing capacity of a deep groove ball bearing. Therefore, technical support is provided for subsequent research of the bearing. According to the method, possible complex load conditions and rotating speed conditions possibly of the ball bearing are considered, the axial ultimate bearing capacity is considered, and the overturning ultimate bearing capacity is also considered. Compared with a traditional method which does not consider the action of the combined loads and has the rotating speed conditions, the method is wider in applicability and higher in universality.
Description
technical field [0001] The invention belongs to the technical field of mechanical design and relates to a method for calculating the ultimate bearing capacity of a ball bearing under combined load. Background technique [0002] At present, ball bearings have been widely used in rotor systems. However, due to installation errors, preload and abnormal load conditions, ball bearings inevitably bear a certain amount of radial and axial loads and overturning moments. When the axial load and overturning moment are large, the contact ellipse between the ball and the inner and outer raceways will be cut off by the raceway rib, and at the same time, stress concentration will occur, which will accelerate the damage of the bearing. In order to avoid the above situation as much as possible, it is necessary to analyze the axial and overturning limit load capacity of the ball bearing. [0003] The existing calculation of the ultimate bearing capacity of ball bearings generally adopts th...
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IPC IPC(8): G06F30/17G06F30/20F16C19/16G06F119/14
CPCG06F30/17G06F30/20F16C19/16G06F2119/14Y02T90/00
Inventor 马辉徐宏阳赵翔王鹏飞贺多
Owner NORTHEASTERN UNIV