The development trend of bearing fault diagnosis technology

<p>Normally, the rotating shaft is supported by two bearings in the radial and axial directions.&nbsp;The bearing on one side is known as the fixed end bearing.&nbsp;It bears two kinds of radial and axial loads and ACTS as the relative axial displacement between the fixed shaft and the bearing box. The other hand is known as the free end, which only conveys the radial load and may be moved relative to the axial direction.</p><p><br></p><p>&nbsp;The most appropriate bearings are bearings that can bear the joint load, as an example, deep groove ball bearings, centering roller bearings and double-row or diagonal touch ball bearings or <a href="https://www.wxingbearing.com/" target="_blank">stainless steel tapered roller bearings</a>.A combination of radial bearings bearing an easy radial load, like cylindrical roller bearings without a retaining edge on the inner and outer rings, combined with deep groove ball bearings or four-point touch ball bearings or even two-way thrust bearings, can also be used as fixed ending bearings. At this stage, the second bearing provides bidirectional axial positioning, but must be set up at a radial distance in the posture box. When the length of the free end posture changes as a result of thermal expansion of the shaft, no extrusion will occur in the bearing. Axial displacement can occur in the bearing interior, bearing ring and bearing seat.</p><p><br></p><p>&nbsp;"Cross fixing" means a bearing arrangement where each bearing is placed one way into the shaft and at the contrary direction. This combination is mainly used for short axes. All radial bearings which can withstand axial load in a minumum of one management are applicable, such as deep groove and angular contact ball bearings, tapered roller bearings, and NJ cylindrical roller bearings.&nbsp;When angular contact ball bearings or tapered roller bearings have been used, preload should be applied in certain cases.Selection of posture configuration.&nbsp;Research on hybrid diagnosis technologyIntelligent analysis technology is an increasingly important research management of imported bearing fault diagnosis technology. It is a developing tendency of intelligent fault diagnosis research to unite many different different smart technologies into a hybrid analysis system.The combination methods mainly incorporate the combination of rule-based expert system and neural network, the combination of case-based reasoning and neural network and fuzzy logic, the combination of neural network and expert system, etc..2) multi-information combination and multi-level analytical integrationContain all kinds of diagnosis knowledge in the information base, combine all sorts of fault data in the database, and make comprehensive analysis and decision according to different fault situations, and find the fault points.The advice obtained from the state monitoring is revised, and then the hierarchical diagnosis model is united to generate the identification according to the inference level blending thickness and depth. It further integrates the signal tracking processing at the status monitoring to the identification system, carries out online data processing and online diagnosis reasoning, realizes the transformation from non-real-time diagnosis to real time diagnosis, and also realizes the unification of data diagnosis and intelligent diagnosis.3) remote collaborative diagnosisRemote combined identification of imported bearing fault based on Web would be to unite the imported bearing analysis technology with computer network technology, and utilize thousands of central computers as servers to set up status tracking points on the key equipment of their enterprise and collect the status data of the equipment.To establish an analytical and diagnostic centre in a scientific research institute with strong technical strength to provide remote technical assistance and guarantee to get enterprises. The characteristics of cross-region remote cooperative diagnosis are the network sharing of test data, analytical methods and diagnostic knowledge, so it's required to enable the core part of traditional diagnostic technologies (i.e., signal acquisition, signal analysis and diagnostic expert system) to run remotely on the network.4) mix of diagnosis and controlIt is the maximum aim of diagnosis technology to ascertain the operation style or plan of the gear according to the current health condition of the equipment and finally predict the failure in order to avoid the occurrence of the fault.It is combined identification system and control system farther, set of observation, identification, control and direction in one.&nbsp;It's developed from a single identification into the dispersed diagnosis in the system, the great deal of data, the kind, the corresponding also requires many different data processing and identification reasoning method of combined, in short, at the future study should further research on diagnosis theory and processes, establish an entire set of directing theory and procedure system of fault diagnosis, the diagnostic theory and the procedure can be applied to the true formation, at the exact same time to strengthen the study of mobile diagnostic and monitoring tool, fault identification is committed to produce a simple platform,Establish a humanized man-machine working environment, improve the efficiency of diagnosis, enhance people's gear management awareness, promote the application and advancement of imported bearings and other equipment error diagnosis technology.</p>