bearingengineer

It is very important to identify or predict the failure of bearings in operation without disassembly inspection, which is very important to improve productivity and economy. The main identification methods are as follows: 1) Identify by sound. Recognition by sound requires rich experience. Must be fully trained to be able to distinguish between bearing sound and non-bearing sound. To this end, we should try our best to carry out this work by special personnel. The sound of the bearing can be clearly heard by sticking a listening device or a listening stick on the housing. 2) Identification by working temperature. This method is a comparative identification method, which is only used in situations where the operating state is not changing much. Therefore, it is necessary to record the temperature continuously. When a fault occurs, the temperature will not only rise, but also change irregularly. This method is suitable to be combined with voice recognition method. 3) Identify by the stat...

 (1) Disassemble and clean the crankshaft components to ensure that the internal oil passage of the crankshaft is clean and smooth. (2) Carry out flaw detection on the crankshaft. If there is any crack, it must be replaced. Carefully check the crankshaft journal, connecting rod journal and their transition arcs, and all surfaces shall be free of scratches, burns and bumps. (3) Check the crankshaft main journal and connecting rod journal, and repair them according to the repair level after the size exceeds the limit. Repair of crankshaft journal is as follows: (4) Check the hardness requirements of crankshaft journal and connecting rod journal, which must meet the technical requirements. Otherwise, it should be reprocessed to meet the use requirements. (5) The radial circular runout of the crankshaft and the radial runout of the thrust face to the common axis of the main journal must meet the technical requirements. Otherwise, it must be corrected. (6) The parallelism of the connect...

Rust-the corrosion of metal, has brought huge losses to machinery manufacturing, especially the corrosion of precision parts such as bearing products, which not only affects the accuracy and surface roughness, but also reduces the service life, even scrapped and can not be used. Bearing rust prevention is an important work, especially the rust prevention between processes. For example, there are many processes for bearing after pickling, cleaning and grinding in heat treatment workshop. When the product is not produced by assembly line, it will be stored in the intermediate warehouse after one-time sequential processing, so the bearing rings stored between processes must be rustproof. Traditional rust prevention methods and their shortcomings The following methods are generally used for rust prevention between bearing processes: 1. Immerse in the rust-proof tank Immersing the bearing ring in the aqueous solution of 5% sodium nitrite and 0.6% sodium carbonate has a good antirust effect,...

Check the regular maintenance of the equipment, operation inspection and the removed bearing during the replacement of the peripheral parts, so as to judge whether it can be used again or whether the use condition is better than bad. Carefully investigate and record the removed bearings and their appearance. In order to understand and investigate the remaining amount of lubricant, clean the bearings well after sampling. Secondly, check the rolling surface, rolling surface and matching surface and the wear state of the holder. To judge whether the bearing can be used again, it should be decided after considering the degree of bearing damage, machine performance, importance, operating conditions, inspection cycle, etc. Inspection results, if the bearing is found to be damaged and abnormal conditions, the content of the injury section to find out the cause, formulate countermeasures. In addition, the inspection result, if there are the following defects, the bearing can not be used again,...

Bearing is one of the most easily damaged parts in small and medium-sized motors. Bearing damage may lead to noise, increased vibration, increased temperature, decreased equipment accuracy, and even motor damage. In order to prolong the service life of bearings, the following elements should be paid attention to in the process of motor installation and use: 1. the installation of coupling When using the coupling to connect the motor and equipment, it is necessary to avoid the axial force generated during installation from damaging the bearing. It is suggested that for the size of interference fit, heat sleeves should be used or installed on the shaft end face of the non-axial extension end to protect the bearing from the influence of large axial force. 2. the bearing lubrication About 36% of bearing damage is caused by poor lubrication or improper use of grease. Small and medium-sized motors (80-355) should be replaced with grease after six months of continuous operation. If the grease...

The following is the most comprehensive bearing introduction manual, which can be used as necessary information for bearing knowledge training: 1. Composition of Bearing Bearings are generally composed of inner ring, outer ring, roller and cage. For sealed bearings, it also includes lubricant and sealing ring (or dust cover). 2. the classification of bearings According to the direction of bearing load: Radial bearings: can bear loads perpendicular to the shaft, some can only bear pure radial loads, and most can also bear axial loads in a certain direction. Thrust bearing: it mainly bears the load along the axial direction. According to the design, it can support unidirectional or bidirectional pure axial load, and some can bear additional radial load. According to the types of rolling elements: Ball bearing: The rolling body is a ball, which has the advantages of low friction coefficient, high limit speed and insensitivity to installation error and deflection, but its bearing capacity ...

Basic knowledge of bearings Bearing is an indispensable part of mechanical equipment, which is mainly used to support the rotating body, reduce friction and ensure the efficient operation of machinery. Understanding the basic concepts, types and applications of bearings is very important for people engaged in mechanical design, maintenance and operation. basic concept Bearings are components that support relative rotating shafts, and usually consist of inner rings, outer rings, rolling bodies and cages. The inner ring is closely matched with the shaft and rotates with it, while the outer ring is in transition fit with the bearing seat, which mainly plays a supporting role. Rolling bodies roll between the inner and outer rings to reduce friction and maintain the stability of movement. The working principle of bearing is to replace sliding friction by rolling friction, thus reducing friction loss and improving mechanical efficiency. Type of bearing There are many kinds of bearings, whi...