Non-standard bearing manufacturing limit speed determination method is what?

Non-standard bearing manufacturing limit speed determination method is what? Source: bearing | last updated: - 2020 08 - 31 non-standard bearing limit speed determination method is what? Non-standard bearing speed first by fever makes the temperature rise of bearing internal conflict constraints; When the speed beyond a certain boundary; Because of the bearing would burn rather than continuous rotation. Bearing limit rotational speed is not fever and can cause burns clash between successive rotation of boundary values. Therefore; Bearing limit speed depends on the type, scale, and precision bearing as well as the method of smooth, smooth agent, maintains quality and quantity of data and a variety of factors such as type and load conditions. All kinds of bearing oil fat smooth and smooth ( Oil bath smooth) When the limit speed of separation is shown in the table bearing dimension; Its numerical show specification to describe bearing in load conditions (usually C / P> =13,Fa/Fr< = 0. 25 or so) When rotation speed boundary value. The other; Smooth agent according to the different varieties and trademarks; Can also is superior to other functions but is not suitable for high speed rotation. Corrects the limit speed load condition C/P< 13 ( The equivalent dynamic load P C beyond simply additional dynamic load of 8% or so) ； Or accept the composition of the load of axial load to surpass 25% of radial load; To make corrections in the type of limit speed. Na na * = f1 f2 * n here: after correcting the limit speed; RPM f1: correcting coefficient related to the load condition of f2: and correcting coefficient of the load on the n: usually load under the condition of limit speed; rpm ( With reference to the bearing dimension tables) C: the ultimate additional dynamic load; N { kgf} P: equivalent dynamic load. N { kgf} Fr: radial load; N { kgf} Fa: axial load; N { kgf} With seals ball bearing limit speed with a touch of sealing ring ( RS) Ball bearing limit speed were sealing ring touch surface linear velocity constraints; Promised to linear velocity depends on the rubber sealing ring material non-standard bearing high temperature phenomenon are handled when non-standard bearing temperature rises, 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.