High Temperature Bearings

High temperature bearing is a kind of bearing that can withstand high temperature. There are many kinds of high temperature bearing, according to different needs and different environments, different types of bearings can be installed.

In transmission systems such as kiln vehicle, blast furnaces or painting equipment, bearings must work at extremely high temperatures, or must withstand extreme temperature differences, ordinary bearings are not suitable. High temperature bearings mainly meet the requirements of various working conditions through optimization design of bearing materials, structure, internal process dimensions and lubrication conditions.

High temperature bearing can be divided into: ordinary structure high temperature bearing and special structure high temperature bearing. High temperature bearings are widely used in high temperature operation machinery such as metallurgy, kiln, glass, blast furnace, painting equipment, etc.

Ordinary structure high temperature bearing: mainly refers to the bearing designed according to the common bearing structure, using high temperature resistant materials such as high temperature resistant bearing steel, etc., mainly including:

-- High temperature graphite bearings

-- High temperature oven bearings

-- High temperature deep groove ball bearing

-- High temperature pillow block bearing

-- High temperature insert ball bearing unit

-- High temperature bearing hot air blower hot oil pump

-- High temperature resistant self-aligning ball bearings,

-- High temperature resistant spherical roller bearings,

-- High temperature thrust ball bearings

-- High temperature cylindrical roller bearing

-- High temperature tapered roller bearing 

-- High temperature spherical plain bearing

-- High temperature angular contact ball bearing etc. ...

High-temperature bearings refer to bearings whose operating temperature is above 150°C. As the chromium bearing steel is used at a temperature exceeding 150℃~C, its hardness will drop sharply, the size will be unstable, and the bearing will not work normally. Therefore, for bearings whose working temperature is 150℃~E～250℃, if the rings and rolling elements are still made of ordinary high-carbon chromium bearing steel, the bearing parts must be subjected to special tempering treatment, which should generally be higher than Tempering is performed at a working temperature of 50°C. The bearing steel that has been tempered according to the above requirements can be used normally at working temperature. However, due to the decrease in hardness after tempering, the bearing life is reduced. When the bearing operating temperature is higher than 250°C, it must be made of high-temperature bearing steel.

Depending on the variety and material, the high temperature resistance is different:

--  Generally, high temperature bearing steel bearings are up to 600°C;

--  Zirconia bearings can withstand 700~900°C;

--  Silicon nitride bearings can reach 1200°C.

--  High temperature resistance of ordinary bearing steel: 150-200℃ (the structure is full of rolling elements, the service life is short, and the maintenance cost is high)

-- High-temperature alloy steel: 300-500℃ (its structure includes cage and full rolling elements; the service life is more than one year, recommended)

-- Silicon nitride ceramic rolling element: 800-1200℃ (its structure is full of rolling elements, long service life, high cost)

If your use environment does not exceed 500 ℃, you can use the second material

High temperature bearings are mainly used in aviation jet engines, gas turbines, nuclear reactor systems, X-ray tube tungsten disks, and high-speed aircraft, rockets, and spacecraft.

Features of high temperature bearings:

1. Lifetime lubrication, no grease is added during use.

2. High cost performance, and the quality is dozens of times higher than that of ordinary bearings.

3. It has won the trust of customers with its long service life.

4. High-temperature bearings are widely used in machinery under high-temperature operations such as metallurgy, furnaces, glass, blast furnaces, painting equipment, etc.