CN-121980687-A - Load processing method for checking service life of automobile hub bearing

CN121980687ACN 121980687 ACN121980687 ACN 121980687ACN-121980687-A

Abstract

The invention belongs to the technical field of bearing life checking, and particularly relates to a load processing method for checking the life of an automobile hub bearing. The method comprises the steps of S1, dividing the running working conditions into straight running, left turning and right turning according to road conditions, dividing each road condition into different working conditions according to vehicle speeds, S2, determining total mileage of different working conditions according to probability distribution and planning mileage of different road conditions, determining the value of dynamic parameters of different working conditions according to the number of working conditions of different road conditions and the value range of each dynamic parameter of corresponding road conditions, S3, determining the running time of an automobile under different working conditions according to the total mileage of different working conditions and the vehicle speeds thereof, calculating the load born by an automobile hub bearing under different working conditions according to the dynamic parameters of different working conditions, and S4, determining the load spectrum of the hub bearing according to the running time and the load. The method solves the technical problem that the load spectrum is simpler to group, so that the checking result and the engineering actual difference are larger in the prior art.

Inventors

YU HAIBO
ZHENG HONGWEI
JIA SONGYANG
WANG HAIWEI
PAN LONG
ZHANG YANYONG
LIU JINGXU
SUN YAQIONG
YANG YUFENG

Assignees

洛阳轴承集团股份有限公司
洛阳东升轴承有限公司

Dates

Publication Date: 20260505
Application Date: 20260403

Claims (10)

1. A load handling method for checking the life of an automotive hub bearing, the method comprising: S1, dividing the running condition of the automobile in full load into straight running, left turning and right turning according to road conditions, and dividing each road condition into different working conditions according to different speeds; s2, determining total mileage of different working conditions according to probability distribution and planning mileage of different road conditions, wherein the probability distribution is probability distribution obeyed by the ratio distribution of the predetermined total mileage of different working conditions to the planning mileage of the road conditions to which the working conditions belong; Determining the values of the dynamic parameters of different working conditions according to the number of working conditions of different road conditions and the value ranges of the dynamic parameters of corresponding road conditions; s3, determining the running time of the automobile under different working conditions according to the total mileage and the speed of the automobile under different working conditions; And S4, determining the load spectrum of the hub bearing according to the running time and the load.
2. The load processing method for checking the life of a hub bearing of an automobile according to claim 1, wherein the probability distribution in S2 is a normal distribution.
3. The load handling method for automotive hub bearing life verification of claim 1, wherein the kinetic parameters include an impact coefficient and a cornering acceleration coefficient; for the same road condition, the larger the vehicle speed is, the larger the impact coefficient of the corresponding working condition is; For the road conditions of left turning and right turning, the larger the vehicle speed is, the larger the absolute value of the turning acceleration coefficient corresponding to the working condition is; For the road conditions of left turning and right turning, the impact coefficients of corresponding working conditions with the same vehicle speed are the same, and the turning acceleration coefficients of corresponding working conditions with the same vehicle speed are absolutely the same but in opposite directions.
4. A load handling method for automotive hub bearing life verification according to claim 1 or 3, wherein the load on the hub bearing comprises radial and axial forces.
5. The load handling method for automotive hub bearing life verification of claim 4, wherein said radial force Calculated according to the following formula: Wherein, the Is the impact coefficient; Full weight for the tire; the weight acceleration is g, the height of the full-load mass center is H, and the tread is T.
6. The load handling method for automotive hub bearing life verification of claim 4, wherein said axial force Calculated according to the following formula: Wherein, the Is the impact coefficient; Full weight for the tire; the weight acceleration is g, the height of the full-load mass center is H, and the tread is T.
7. The load processing method for checking the service life of an automobile hub bearing according to claim 1, wherein the method for determining the value of the dynamic parameter of the different conditions according to the number of the conditions of the different conditions and the value range of each dynamic parameter of the corresponding conditions comprises the steps of equally dividing the value range of the dynamic parameter according to the number of the conditions of the corresponding conditions of the road to obtain the value of the dynamic parameter of the different conditions under the condition of the road.
8. The load handling method for checking the life of an automobile hub bearing according to claim 1, wherein S3 further comprises calculating the rotational speeds of the hub bearing under different conditions according to the speeds of the hub bearings under different conditions; correspondingly, in S4, the load spectrum is also obtained in combination with the hub bearing rotational speed.
9. A load handling method for automotive hub bearing life verification as recited in claim 3 in which the vehicle speed range is for straight road conditions The range of the impact coefficient is 。
10. A load handling method for automotive hub bearing life verification as claimed in claim 3, wherein the vehicle speed range is for left-turn and/or right-turn road conditions The range of the impact coefficient is The absolute value of the turning acceleration coefficient is in the range of G is gravitational acceleration.

Description

Load processing method for checking service life of automobile hub bearing Technical Field The invention belongs to the technical field of bearing life checking, and particularly relates to a load processing method for checking the life of an automobile hub bearing. Background The automobile hub bearing mainly bears the weight of the automobile body and the carrying objects. For passenger vehicles, the hub bearings use ball bearings because the load is generally relatively light, but the vehicle speed is high, and for commercial or engineering vehicles, the hub bearings use tapered roller bearings because the load is generally high, but the vehicle speed is relatively low. Aiming at different vehicle types and different working conditions, the life analysis of the hub bearing which is closer to the real situation is very important. The proper size of the hub bearing can meet the normal service life of the vehicle, and the high use cost caused by overlarge allowance can be avoided. When the service life of the hub bearing is checked, the load spectrum of the bearing needs to be acquired, and two main means are available for load acquisition at present. One is to obtain a bearing load spectrum under real road through experiments, such as the chinese patent application publication No. CN 111896255A. The other is to carry out theoretical calculation according to the load of the vehicle, and the method can develop a load spectrum under the condition of only knowing the parameters of the designed vehicle, so that the method is very convenient and can be widely applied. For example Tong Chengpeng et al, published in 6 of 2021, hunan engineering institute, in the section "heavy truck hub bearing life estimation based on endurance test load spectrum", which is characterized by that it adopts the method to draw load spectrum and make bearing life estimation, in which two working conditions of "good" and "poor" are set in straight line section, and its vehicle speed is 80km/h and 60km/h respectively. The current load spectrum settings have no fixed criteria and often depend on the designer's experience. In the prior art, the working conditions are divided into 6 simple working conditions of impact straight line, no-impact straight line, left turning, right turning, left sharp turning and right sharp turning at most. The speed, the duration of each working condition or the mileage are set to be different, so that the final calculated service life of the bearing is greatly different. Or the most disfiguring working condition is selected during calculation, so that the bearing is larger in selected size, the allowance is overlarge, and certain additional cost is increased. Disclosure of Invention The invention aims to provide a load processing method for checking the service life of an automobile hub bearing, which aims to solve the technical problems that when a load spectrum is set in service life checking in the prior art, the load spectrum is simply grouped, and the checking result and engineering actual difference are large. In order to solve the technical problems, the technical scheme of the load processing method for checking the service life of the automobile hub bearing provided by the invention is that the load processing method for checking the service life of the automobile hub bearing comprises the following steps: S1, dividing the running condition of the automobile in full load into straight running, left turning and right turning according to road conditions, and dividing each road condition into different working conditions according to different speeds; s2, determining total mileage of different working conditions according to probability distribution and planning mileage of different road conditions, wherein the probability distribution is probability distribution obeyed by the ratio distribution of the predetermined total mileage of different working conditions to the planning mileage of the road conditions to which the working conditions belong; Determining the values of the dynamic parameters of different working conditions according to the number of working conditions of different road conditions and the value ranges of the dynamic parameters of corresponding road conditions; s3, determining the running time of the automobile under different working conditions according to the total mileage and the speed of the automobile under different working conditions; And S4, determining the load spectrum of the hub bearing according to the running time and the load. Compared with the prior art which decomposes 6 groups of working conditions at most, the method has the advantages that when the load spectrum is grouped, the corresponding mileage distribution proportion of different working conditions is set based on engineering experience, so that the method is more in line with engineering experience practice, the checking result of the bearing is more in line with practice, and more accurate judgment basis