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Method of installing EDA bearings, bearing, conditions, with structure and, in general, due to rotate, so the inner ring interference fit is required. Bearings with a cylindrical bore, multi-purpose press press, or use the hot charging method. Tapered bore, directly installed in the taper shaft, or sleeve installation.
The wear failure refers to the failure of the relative sliding friction between the surfaces due to the surface of metal wear and the. Continuous wear will cause the tapered roller bearing parts gradually damaged, and eventually lead to loss of precision bearing size and other related topics. Wear may affect the shape changes, increased clearance and surface morphology changes, may affect the lubricant or its pollution to a certain extent and cause lubrication complete loss of function, so that the EDA bearing the loss of rotational accuracy and can not operate normally. Wear failure is one of the common failure mode of bearings, according to wear form is usually divided into the abrasive wear and adhesive wear the most common.
Mounted to the housing, general clearance, there is interference in the outer ring, usually with presses into, or have shrink fit method of installing cooling. Using dry ice as a cooling agent, shrink fit occasion, the moisture in the air condenses on the bearing surface. So, need appropriate antirust measures.
The main reason of tapered roller bearing failure are two factors deficiency and overload. When the load exceeds the limit strength of the material as a result of parts breaking overload fracture. Overload causes the main host of sudden failure or improper installation. EDA bearing parts of the micro cracks, shrinkage, bubbles, large foreign materials, organizations and local overheating burn defect in defect caused by fracture in severe shock or vibration overload also, known as the defect fracture. It should be noted, bearing in the manufacturing process, the raw materials into the factory inspection, casting and heat treatment quality control, process control through instruments and accurate analysis of the existence of the defect, the future must still strengthen control. But in general, failure mostly overload failure bearing fracture usually thrown.
Install the tapered roller bearing is correct or not, affect the accuracy, performance, service life. Therefore, the design and assembly departments for bearing installation to fully study. Want to be installed according to the operating standard.
Bearing in the work, because the effect of external or internal factors, so that the original clearance change, accuracy, and even cause "killed" called the clearance change failure. External factors such as excessive interference, the installation is not in place, the temperature rise caused by the expansion of the quantity, instantaneous overload, internal factors such as residual austenite and residual stress is not chaos state are mainly caused by failure of the clearance change.
EDA bearings coated with anti rust oil with good lubricity, bearings for general purpose bearing or filling grease, can not directly use cleaning. But for the instrument bearing or bearing for high-speed rotation, cleaning oil with clean antirust oil wash, the bearing is easy to rust, not long time placed.
Clean the bearing and shell, no burr scars or machining left. The housing absolute no abrasive (SiC, Al2O3) sand, chip etc..
Tapered roller bearings are generally made by casting, heat treatment, machining, grinding and assembling multi-channel processes. The process is reasonable, advanced sex, not chaos will also affect the life of the bearing. The effect of heat treatment and grinding process quality of finished bearings, often has a more direct relationship with the bearing failure. Study on bearing surface modification layer of work in recent years, the relationship between grinding and surface quality of bearing close.
The main task of the service life of the bearing, is based on the analysis of data and failure forms of the large amount of background material,, identify the main factors causing bearing failure, so as to put forward the improvement measures, extending the service period of EDA bearings, to avoid premature failure of the tapered roller bearing a sudden.