Various types of bearing installation

Bearing is installed correctly, affecting the accuracy, life expectancy, performance. Therefore, the oil-free compound bushing design and assembly department for the bearing installation to fully study. Hope to install in accordance with operating standards. The usual criteria for the project are as follows:
 
(1), cleaning bearing and bearing related parts
(2), check the size of related components and finishing conditions
(3), installation
(4), after installing the bearing inspection
(5), supply of lubricant
 
Hope that soon before the installation, just open the bearing packaging. General grease lubrication, not cleaning, direct filling grease. Lubricant lubrication, generally do not have to clean, but the instrument or high-speed bearings, etc., to use clean oil wash, in addition to sliding oil-free bearings to paint the rust inhibitor on the bearings. Remove the rust-proof bearings, easy to rust, so sliding self-lubricating bearings can not be placed ignored. Furthermore, the bearings that have been sealed with grease are not cleaned for direct use.
 
Bearing installation method, due to the bearing structure, with the different conditions, in general, due to mostly shaft rotation, so the inner ring needs interference fit. Cylindrical bore bearings, multi-press press-in, or multi-purpose hot-loaded method. Cone hole the occasion, directly mounted on the tapered shaft, or with the sleeve installed.
 
When mounted to the housing, the general clearance with more than the outer ring has an amount of interference, usually press into the press, or also after the installation of cold shrink fit method. With dry ice as a coolant, shrink fit with the installation of occasions, the moisture in the air will condense on the bearing surface. Therefore, the need for appropriate anti-rust measures.
 
1, cylindrical hole bearing installation
(1) press into the press method
Small bearings widely used presses press into the method. The pad pad into the inner ring, with a press quietly pressed to the inner ring and close contact with the shaft so far. The pad on the outer ring pad to install the inner ring is caused by indentation on the raceway, crushed the reason, so absolutely prohibited.
When operating, it is best to grease the mating surfaces beforehand. The last resort to hammer the installation with the occasion, to pad in the inner pad pad operation. This practice has repeatedly become the cause of bearing operation, therefore, limited to the situation with a small amount of interference can not be used for large amount of interference, or medium and large bearings.
 
Such as deep groove ball bearings such as non-separable bearings, inner ring, outer ring are required to install the occasion of the interference, pad pad, with a screw or hydraulic pressure, the inner ring and the outer ring simultaneously press. Self-aligning ball bearing outer ring is easy to tilt, even if it is not interference fit, it is best to pad pad installation.
Such as cylindrical roller bearings, tapered roller bearings, such as the separation of bearings, the inner ring, the outer ring can be installed on the shaft and the shell, respectively, the installation of the inner and outer rings are combined, the key is steady Steady to close the two in order to make the center of the two do not deviate, barely pressed will cause raceway surface injury.
 
(2) hot-loaded method
Large bearings require a lot of force when pressed, so they are hard to press in. Therefore, the bearing in the oil heating, so that expansion, and then installed on the shaft of the hot-filled method is widely used. Using this method, you can not increase the bearing undue force, to complete the operation in a short time.
 
Bearing heating temperature to bearing size, the required amount of interference as a reference. Hot work related notes are as follows:
(a) Do not heat bearings above 120 ° C;
(b) For bearings not to directly contact the bottom of the sump, it is a good idea to place the bearing on a metal mesh table or to suspend the bearing;
(c) heat the bearing to a temperature 20 ° C to 30 ° C above the required temperature so that the inner ring will not become cold during operation, making it difficult to install;
(d) After installation, the bearing cools down and contracts in the width direction, so use a shaft nut or other suitable method to fasten it.
(__ to prevent the gap between the inner ring and the bearing block shoulder.
 
3, running check
After the bearing has been installed, check the operation to check that it is installed correctly. Small machines can be rotated by hand to confirm that they are rotating smoothly. Inspection items due to foreign body, scars, indentation caused by poor operation, due to poor installation, the installation of poor processing due to the uneven rotation torque generated by the clearance is too small, the installation of the error caused by friction and so on a large torque and so on . If there is no abnormality you can start the power running.
 
Because large-scale machinery can not be rotated manually, turn off the power immediately after no-load startup, and perform inertial operation to check for any vibration, noise, contact of rotating parts, etc., and confirm that there is no abnormality and enter the power running.
 
Power operation, starting from no-load low-speed, slowly raised to the rated conditions of operation. Test run during the inspection, whether there is abnormal noise, bearing temperature transfer, lubricant leakage and discoloration and so on. In the test run if found to be abnormal, should immediately stop running, check the machine, if necessary, remove the bearing inspection.
 
Bearing temperature test generally speculate from the shell can be seen. However, the use of oil holes, direct measurement of bearing outer ring temperature, more accurate. Bearing temperature began to run gradually increased, if no exception, usually 1 to 2 hours after the stable. If due to poor bearing or installation, the bearing temperature will rise sharply, abnormal temperature. The reasons such as excessive lubricant, bearing clearance is too small, poor installation, sealing device friction is too large. High-speed rotation of the occasion, the bearing lubrication method selection error is also the reason.
2, tapered bore bearing installation
Cone bearing is fixed directly to the inner cone tapered shaft, or with adapter sleeve, demount the sleeve mounted to the cylindrical shaft. Large-scale self-aligning bearing hydraulic installation.

Hunan Jintai Hardware and Machinery Co.,Ltd. is a professional manufacturer on various kind of bearings over 15 years China factory.
We are making all kinds of slide bearings including DU PTFE composit bushing, DX POM composite bushing,bimetal bushing,wrapped bronze bushing, cast sliding bushings and wear plate bearing pad, sintered bronze bushing and sintering parts, ball transfer bearings, etc.
The shapes of bearings can be in sleeve, flanged, spherical, plate, washer, pad, ring, square etc.
Base materials in carbon steel, harden steel, iron, stainless steel, bronze, brass, copper, bronze-steel alloy.Lubricant materials in PTFE, teflon, POM, nylon, plastic, oil, graphite, grease, MoS2, etc.
Export to America,Canada,Brazil,Peru,Argentina,Chile,Paraguay,Europe,Finland,France,Germany,Italy,Spain,Sweden,
Britain,Estonia,Ukraine,Turkey,Austrial,Russia,Korea,Malaysia,Singapore,Thailand,Egypt,Kenya,Somali,
Congo,Zimbabwe,South Africa,etc.