Bearing residual life estimating method and device
A technology for evaluating devices and bearings, applied in the field of bearings, it can solve the problems of inconstant load, inaccurate fatigue life, changes, etc., and achieve the real effect of remaining life
Inactive Publication Date: 2018-03-27
SCHAEFFLER TECH AG & CO KG
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[0009] The above calculation method obtains the fatigue life of the bearing under standard working conditions. Under standard working conditions, the load on the bearing is considered to be constant, but in the actual operation of the bearing, the actual load on the bearing is not constant and changes.
Moreover, the above calculation method does not take into account the actual operating conditions and installation conditions such as the external load of a single bearing, lubrication state, operating temperature, and rotational speed. Therefore, the fatigue life calculated by the existing method is not accurate, resulting in inaccurate assessment of the remaining life of the bearing. precise
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[0031] In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0032] This embodiment provides an evaluation method for bearing remaining life, refer to figure 1 As shown, the evaluation method includes the following steps:
[0033] S10: Obtain the real-time load of the bearing when the bearing is running;
[0034] S20: Determine the time period passed between two adjacent real-time loads, and the load equivalent value and the number of rotations corresponding to the time period;
[0035] S30: According to the number of running cycles and the corresponding fatigue life, obtain the damage degree corresponding to each load equivalent value to obtain the actual damage degree of the bearing. The total number of laps, the actual damage degree is the sum of each damage degree;
[0036] S40: Obtain the re...
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The invention provides a bearing residual life estimating method and device. The estimating method includes acquiring real time load of the bearing when the bearing runs; determining a time duration between two adjacent real time load and a load equivalent value and an operation circle number corresponding to the time duration; acquiring damage level corresponding to the load equivalent value according to the operation circle number and the corresponding fatigue service life so as to acquire the actual damage level of the bearing; and acquiring the residual life of the bearing according to theactual damage level and the operation circle of the bearing. The scheme provided by the invention can estimate the residual life of the bearing accurately.
Description
technical field [0001] The invention relates to the field of bearings, in particular to a method and device for evaluating the remaining life of a bearing. Background technique [0002] Bearing life is the lifespan of a bearing, i.e. the total number of revolutions a bearing can run before failing. [0003] In most cases of normal use, the form of bearing failure is fatigue damage of the bearing parts on the rolling surface used for rolling contact. Therefore, the bearing life generally refers to the fatigue life of the bearing. [0004] At present, the fatigue life of bearings is generally obtained by the general formula of bearing life formulated in "ISO 281 Rolling Bearings. Rated Dynamic Load and Rated Life" (hereinafter referred to as "ISO 281"). The general formula is: [0005] in [0006] Among them, L nm is the fatigue life of the bearing, a 1 is the life correction factor based on reliability, a ISO is the life correction factor based on factors such as lu...
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Login to View More IPC IPC(8): G01M13/04
CPCG01M13/04
Inventor 马子魁魏来黄运生吉尔森·阿瑞玛刘泳
Owner SCHAEFFLER TECH AG & CO KG