Troubleshooting of bearing seal
A. Improper assembly method
Bearing and shaft diameter or the housing bore interference is small, the use of press-fit assembly method. The easiest way is to use copper and hand hammer, according to a certain order symmetrically beat bearings with interference fit race, well pressed into the bearing. In addition, a soft metal hammer into the casing by hand or pressed into the press. If improper operation, it will make the race to crack deformation, or hammering at the hands of non-interference with the race, will make the raceways and rolling elements bearing indentation or indirectly be destroyed.
B. assembly temperature abuse
Bearing in the assembly, if interference with the shaft diameter is large, the general assembly of thermal installation method. Coming into bearing oil drums filled with oil, machine oil drums external heating with hot water or flame, the process requires heating the oil temperature control in 80 ℃ ~ 90 ℃, generally not more than 100 ℃, has no more than 120 ℃. Set in the journal quickly removed after bearing heat. If the temperature control caused by improper heating temperature is too high, then make bearing temper caused the hardness decreased, the operation of the bearing to wear, spalling, and even cracking.
C. improper assembly gap adjustment
Rolling into radial clearance and axial clearance gap, its purpose is to ensure the normal operation of the rolling elements and compensate for thermal elongation and lubrication.
For adjustable bearing clearance is concerned, because of the gap between the axial and radial clearance proportional relationship, it means that as long as you can adjust the axial clearance required to obtain radial clearance, and cut it generally mounted in pairs, i.e., one end or both ends of the shaft) Thus, only need to adjust an axial bearing clearance can. General use shimming axial gap, and some can also be used to adjust the screw or thrust ring. Bearing query
Seals for bearings is extremely important if there is a problem, then seal area will cause seal bearing a great impact, if irregular, lack of meat, small cracks and other defects are not possible
Bearing tightness test cylinder seals are assembled on site and assembling connections and reliability assessment. The sealed cylinder cylinder ports and connections, there are between cylinder piston rod chamber and the rod chamber) on the dynamic and static seals and seal status.
Pressure bearing tightness test is great, especially for rodless cavity pressure test, without tooling bear, the rod chamber pressure test, and by acting on the piston rod on a lot of pressure, if only by the cylinder port connection is absolutely impossible to bear, therefore, usually after such a pressure test cylinder is assembled carefully, before entering the assembly machine commissioning stage.
A. Improper assembly method
Bearing and shaft diameter or the housing bore interference is small, the use of press-fit assembly method. The easiest way is to use copper and hand hammer, according to a certain order symmetrically beat bearings with interference fit race, well pressed into the bearing. In addition, a soft metal hammer into the casing by hand or pressed into the press. If improper operation, it will make the race to crack deformation, or hammering at the hands of non-interference with the race, will make the raceways and rolling elements bearing indentation or indirectly be destroyed.
B. assembly temperature abuse
Bearing in the assembly, if interference with the shaft diameter is large, the general assembly of thermal installation method. Coming into bearing oil drums filled with oil, machine oil drums external heating with hot water or flame, the process requires heating the oil temperature control in 80 ℃ ~ 90 ℃, generally not more than 100 ℃, has no more than 120 ℃. Set in the journal quickly removed after bearing heat. If the temperature control caused by improper heating temperature is too high, then make bearing temper caused the hardness decreased, the operation of the bearing to wear, spalling, and even cracking.
C. improper assembly gap adjustment
Rolling into radial clearance and axial clearance gap, its purpose is to ensure the normal operation of the rolling elements and compensate for thermal elongation and lubrication.
For adjustable bearing clearance is concerned, because of the gap between the axial and radial clearance proportional relationship, it means that as long as you can adjust the axial clearance required to obtain radial clearance, and cut it generally mounted in pairs, i.e., one end or both ends of the shaft) Thus, only need to adjust an axial bearing clearance can. General use shimming axial gap, and some can also be used to adjust the screw or thrust ring. Bearing query
Seals for bearings is extremely important if there is a problem, then seal area will cause seal bearing a great impact, if irregular, lack of meat, small cracks and other defects are not possible
Bearing tightness test cylinder seals are assembled on site and assembling connections and reliability assessment. The sealed cylinder cylinder ports and connections, there are between cylinder piston rod chamber and the rod chamber) on the dynamic and static seals and seal status.
Pressure bearing tightness test is great, especially for rodless cavity pressure test, without tooling bear, the rod chamber pressure test, and by acting on the piston rod on a lot of pressure, if only by the cylinder port connection is absolutely impossible to bear, therefore, usually after such a pressure test cylinder is assembled carefully, before entering the assembly machine commissioning stage.
