Method and device for determining service life of bearing

A technology for bearing life and life, applied in the field of bearings, can solve the problems of inaccurate judgment of the operation status of the transmission system, difficult bearing life in the bogie gearbox, etc., and achieve the effects of accurate bearing life, good operating conditions, and improved reliability.

Active Publication Date: 2019-07-12
CRRC QINGDAO SIFANG CO LTD
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, for the bearings in the transmission system, at present, the calculation of its life is relatively general, and there is a certain deviation between the calculated life value and the actual life of the bearing, which leads to inaccurate judgments on the operating conditions of the transmission system including the bearing.
For example: for some speci

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and device for determining service life of bearing
  • Method and device for determining service life of bearing
  • Method and device for determining service life of bearing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0056] At present, rail transportation tools include: trains, subways, trams, etc., which bring great convenience to people's travel. Among them, the bogie is one of the important results of the rail vehicle, and the life of the bearing in the gearbox on it directly determines the efficiency and reliability of the entire transmission system and even the entire rail vehicle. In general, bearing life refers to the cumulative running time when fatigue expansion first occurs in the inner and outer rings or rolling elements of the bearing. It can be understood that there is generally an exponential relationship between the bearing life and the equivalent dynamic load it bears. Therefore, in order to accurately calculate the bearing life, it is necessary to calculate the equivalent dynamic load on the bearing as accurately as possible.

[0057] However, the inventor's research has found that the bogie gearbox is due to its special working conditions, that is, it must bear the variab...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The embodiment of the invention discloses a method and a device for determining the service life of a bearing. Through load spectra comprising motor output torques under multiple different working time lengths under various working conditions, for a target working condition, an equivalent average load under the target working condition is calculated by using the motor output torque corresponding to each working time length, in combination with the current vibration load and the meshing load of the bearing, therefore the service life of the bearing is determined based on the equivalent averageload. In this way, due to the introduction of the motor output torques of different working time lengths under each working condition, the obtained equivalent average load not only considers the vibration load caused by the random irregularity of a wheeltrack, but also reflects the variable torque load transmitted from the motor, so that the calculated service life of the bearing is more accurate,and the operation conditions of the transmission system can be better determined, thereby improving the operation reliability of the transmission system.

Description

technical field [0001] The invention relates to the technical field of bearings, in particular to a method and device for determining bearing life. Background technique [0002] Bearings, as an important part of the transmission system in mechanical equipment, are mainly used to support the mechanical rotating body, reduce the friction coefficient of the mechanical rotating body during motion, and ensure the rotation accuracy of the mechanical rotating body. For the entire transmission system, or even the entire mechanical equipment (such as rail transit trains), the life of the bearing is related to the efficiency and reliability of the entire transmission system and mechanical equipment. Therefore, if the life of the bearing can be accurately determined, there will be It is beneficial to effectively evaluate the use status of the transmission system and mechanical equipment. It should be noted that the bearing life can refer to the cumulative running time when the inner a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01M13/045
CPCG01M13/045
Inventor 侯建文董晓红张月军
Owner CRRC QINGDAO SIFANG CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap