Note ntn railway bearing heating assembly

Web Design And Seo For www.china-webdesign.com

thrust bearing - China Manufacturer

Thank you for inquiry my thrust bearing, Tel : 0086-0379-64390888, E-mail: liuping@lyzyc.cc

http://www.lyzycbearing.com/key-thrust-ball-bearings-41/

Replacement ntn bearing the most common, there are two ways: one is acetylene oxygen railway bearing direct heat; another oil immersion heating small bearings to thermal expansion, expand the bearing bore diameter, so that the assembly. These methods are widely used in the long-term maintenance of equipment, basically meet and solve the problem of the bearing assembly in the equipment maintenance. However, these two kinds of methods to ensure that the bearings in the heating process, the temperature of the heated area evenly, it is difficult to determine. Because the traditional acetylene oxygen heating are single gas burners and heating process is just a rule of thumb, the the railway bearing temperature warmed added to the number of degrees right difficult to grasp. Temperature be ntn bearings produce annealed to reduce the mechanical properties of the bearing; temperature is too low, the thermal expansion value is not enough, difficult to assemble. Equipment repair, repairman sometimes enough warming to the bearings, bearing wear less than the correct position, forced to take down the heavy equipment, thus increasing the labor intensity. To this end, we offer you the way t o change the tradition of bearing.cylindrical bearings
Electrically heated alternative heating acetylene oxygen. The plane electric furnace design a cylindrical electric furnace, named bearing electric heater, different power and specifications can be designed according to different railway bearing diameter bearing electric heater (Best Scope ntn bearing diameter φ300mm / more) . This heating device has the following advantages: thermal radiation is uniform, stable, heat bearing surface without soot, clean, clean, easy to measure and control the bearing temperature.
Ntn bearing surface is heated using infrared thermometer for temperature monitoring. The heating value of the bearing assembly is generally controlled at 100 ° C to 120 ° C is appropriate. The thermal expansion of steel within this temperature value, the bearing, easy bearing assembly, the value of this temperature will n ot change the mechanical properties of the bearing, and high reliability.
The heating temperature of the imported bearings, bearing size, the required amount of interference by reference. Hot charging job-related considerations are as follows:
(A) does the bearing is heated to above 120 ℃;china bearing company
(B), ntn bearing no direct contact with the sump at the bottom, it is best to consider the railway bearing on the metal mesh platform, or the bearing hanged;
(C) the bearing heated to higher than the desired temperature of 20 ° C -30 ° C, so that the operation is not to occur inner ring cools, it is difficult to install;
(D) after installation, the bearing cools down, the width direction is also contracted, so use the spindle nut, or other suitable method, so that the fastening, to prevent a gap is generated between the inner ring and the bearing shoulder block.
The imported bearing temperature checks are generally known from the shell appearance speculate. However, the use of oil hole, the direct measurement of the temperature of the bearing outer ring, more accurate. ntn bearing temperature operation began to rise gradually, without exception, usually 1 to 2 hours after stable. If bad due to the of railway bearings or installation, the bearing temperature will rise sharply, and abnormally high temperatures. The reason lubricant such as excessive bearing clearance is too small, poor installation, sealing device friction is too large. High-speed rotation of the occasion, choose the wrong of railway bearing lubrication method is also its causes.abec 7 bearings