KOYO outer spherical bearing high temperature caused by the failure of the basic phenomena

1. When KOYO outer spherical bearing temperature too high what phenomenon? ( 1) 。 ( 2) 。 Bright, light plate machine by hydraulic mechanical fault indicates the instrument temperature, bearing temperature signal relay action. ( 3) 。 The thermometer plate ( Inflating the thermometer) Black stitches overlap or more yellow and yellow needle. ( 4) 。 Bearing temperature fault signal. 2. KOYO outer spherical bearing high temperature causes: ( 1) 。 May be KOYO outer spherical bearing of the cooling water, high temperature phenomenon. ( 2) 。 It is possible that KOYO outer spherical bearing oil degradation, the CPC degradation, oil itself is not clean or run. Such as moisture in the oil increase can cause the acidity of the oil, can reduce oil lubrication, the bearing shell eroded, causing the KOYO outer spherical bearing temperature rise phenomenon. 3. KOYO outer spherical bearing high temperature occurs when handling. When KOYO outer spherical bearing temperature, the first to determine whether there is an error action, if the temperature is indeed rising, should immediately do the following treatment: ( 1) 。 Check the cooling water pressure, water flow and pipeline system is normal. If water is likely to be lower filter blockage, cannot be handled in a timely manner, to stop treatment, when confirm can work, then put into use. ( 2) 。 Should be to check if the governor oil pressure, oil pressure is low can lead to cooling water hydraulic valve closed. ( 3) 。 Check for different bearing, bearing and testing degrees whether there are abnormal. ( 4) 。 Take oil whether there is a change of color, sample observation and test to see whether metamorphism. If confirm the degradation new oil should be replaced downtime. ( 5) 。 Check the oil standard oil level is normal, if abnormal, check that the sump oil discharge valve is shut. If the matter, should fill oil, if is the sealant mat permeability oil, should stop processing. Contact fatigue failure refers to the KOYO outer spherical bearing working surface under the role of alternating stress and failure. Contact fatigue spalling occurred in bearing working surface, often accompanied by fatigue crack, first of all, from the maximum cyclic shear stress under contact surface produce & shy; , and then extended to form a different flake shape, such as dot to pitting corrosion or pitting spalling, peel into small sheet according to the shallow flaking. Due to spalling surface expands gradually, and often to deep extension, forming deep spalling. Deep spalling is & shy; Contact fatigue failure of fatigue source. KOYO outer spherical bearing in the work, because of the influence of the external or internal factors, change the original fit clearance, lower accuracy, and the change of 'killed' called clearance failure. The external factors such as interference, large amount of installation does not reach the designated position, temperature rise caused by expansion & shy; Expansion amount, instantaneous overload, etc. , internal factors such as residual austenite and the residual stress in a state of flux and so on all is the main reason for the failure caused by clearance changes. KOYO outer spherical bearing failure of the main reason is that defects and overload two factors. When the loads more than material strength limit fracture caused by parts called overload fracture. Overload reason mainly is the main engine failure or improper installation. Micro cracks of bearing parts & shy; , shrinkage cavity, bubbles, large foreign impurities, overheating organizations and local burns and other defects during the impact overload or violent vibration will cause fracture in defect, known as defect fracture. It should be pointed out that imported bearing in the process of manufacturing, for raw materials into the & shy; Factory reinspection, forging and heat treatment quality control, process control through instrument analysis of the existence of the above defects and correct still must strengthen control in the future. But in general, usually bearing fracture failure mostly overload & shy;