Motor bearing choose matching learned, improper collocation harm is big

Motor bearing is always a product more topic of discussion, different electrical products need to match the corresponding bearing, bearing choose not to at that time, there may be a direct impact on motor performance problems such as noise, vibration, serious when, affect the service life of the motor. Deep groove ball bearing is one of the most widely used bearing type, special operation environment of the motor will have different requirements for bearing, if necessary, deal with bearing materials, manufacturing process and puts forward specific requirements. Deep groove ball bearing noise can be through the conduction structure or air medium. Rotation of the deep groove ball bearing itself is the source of the source of sound or vibration, bearing vibration or noise, mainly from the natural vibration of rolling bearings and bearing vibration of the internal relative motion. In the actual use process, the selection of the bearing grease, filling quantity, bearing installation and maintenance, and use all have direct influence on bearing operation. In motor design stage, manufacturing stage and the client's use and maintenance phase, should be carried out on the bearing and standardize the necessary maintenance, avoid the quality problem caused by bearing motor. Motor bearing selection should focus on elements 1 motor bearing special specifications of the special material: choose low requirements, good rust resistance, or work in a corrosive environment such as salt water is recommended to choose stainless steel bearing; Low temperature tempering processing: using temperature is higher, more than 150 degrees, the requirements of the bearing ring adopts high temperature tempering heat treatment method, normal heat treatment of tempering temperature for 3 hours, 160 degrees, high temperature tempering according to actual condition choose 180 degrees or 220 degrees or 250 degrees, etc. Low freezing treatment: after quenching, tempering, before adding low temperature of 70 degrees below zero frozen processing technology, main purpose is to reduce the residual austenite content inside the ring, improve the stability of the bearing dimension precision. 2 motor bearing seal structure and selection of material bearing seal to prevent bearing parts within the lubricant leakage, and to prevent external dust, water, foreign bodies, such as harmful objects into bearing internal, can make the bearing under the condition of required, safe and durable. When the following situations, can give priority to choose to make filling grease sealed bearing. Low does not require bearings for permanent operation. Low low engine speed, load, temperature operating conditions. Low demand of low production cost. Add lubricant has a difficult part, or later don't need to add lubricant. Use of such bearings, bearing shell ( Box) And seal design to simplification, greatly reduce the manufacturing cost: use condition is harsh, even for a long time, it is widely adopted by such as household appliances, vehicles, motor industry. 3 choose deep groove ball bearings with grease at the shaft of the motor in addition to the rolling contact, there are quite a sliding contact. So the main purpose of the bearing is, reduce the friction and abrasion, each part of the bearing does not produce high temperature burning fuse. Proper lubrication, lubricants or not, directly affect the bearing performance and durability greatly, and so on. In general, have the following the role of grease. Low to reduce friction and wear; Low friction heat conduction, remove bearing heating due to friction, needed by the mediation of lubricant and conduction of heat to it or take away, and makes the bearing temperature drop, lubricants, bearings and thus to maintain a long run. Low to lessen the local stress concentration. The classification of the grease grease is mineral oil or synthetic oil lubricating oil as base oil, joined the thickener and becomes a solid shape, as a carrier to keep the base oil, the other in order to improve the performance and reassembled and adding various additives. As a result, the nature of the grease consists of base oil, thickener and additive type and composition to decide. Grease classification there are many ways, most commonly classified by the type of thickening agent, points of two kinds of metal soap and the soap base. By new thickening agent, additives are constantly developed, and have great improved the performance of grease, so the selected grease, actual fully grasp the latest different grease necessary features. 4 motor bearing installation and use of the rolling bearing is precision components, installation and use should be regulated. Bearings when installation should make ring force, that is, when pressed on the shaft bearings, bearing inner ring should stress, it is the bearing outer ring stress; While at the same time satisfy the shaft and bearing assembly, must ensure that the bearing inner and outer circle stress at the same time. Any conditions, bearing cage should not be affected by external forces. 5 motor bearing vibration and noise level choose deep groove ball bearing noise can be through the conduction structure or air medium. Rotation of the deep groove ball bearing itself is the source of the source of sound or vibration, bearing vibration or noise mainly comes from the natural vibration of bearings and bearing vibration of the internal relative motion. The natural vibration - — Bearing inner and outer ring for thin wall ring, itself has its inherent vibration mode, usually motor bearings between the first natural frequency in a few KHz. Bearing vibration of the relative movement of internal - Inside and outside the ring and real surface geometry of the steel ball surface, such as roughness and waviness, these will affect the bearing of sound and vibration, of which the biggest effect on the surface of the steel ball ball.