How to install high speed bearings
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234407BM 234706BM 234406BM 517/2860V/YA 5610/2500 517/1720X1V 527/1181M 510/1180M 517/930 510/670 590/560 510/500 52780 59080 517/368M 51760U 517/238 6207-2ZN 6206-2ZN 6205-2ZN 6204-2ZN 6203-RZ 6203-2ZN 6202N 6202-2ZN 6201-2ZN 6200ZZ 6200-2ZN 62/32-ZN 62/32-Z 62/32N 62/32-2Z 62/32-2RZ 62/32-2RS 62/28-2RZ 62/22-2RZ 61996 61992 61988 61984
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High speed bearing installation adjustment and cooperation:
1. coordination and clearance due to the high speed bearings for high speed bearing according to requirements of high-precision bearings and according to requirements of high-temperature bearing, so when you consider its fit and clearance, and to take into account the following points:
(1) size change when rising from room temperature to high temperature and hardness changes;
(2) high speed centrifugal force caused by the forces of change and shape change.
In short, at high speed and high temperature conditions, from coordination and clearance on select to strive to maintain the accuracy and performance of the bearing, it is difficult.
In order to ensure the Raceway and small deformation of bearing after installation, interference interference can not be made too large, and thermal expansion of high speed centrifugal force and under high temperatures or normal pressure of offsetting the mating surfaces. Or combined with relaxation, so interference must be in consideration of the above factors carefully calculated under the premise of, effective interference at room temperature under constant speed for high speed bearing may be invalid.
If the result of this contradiction is too big (usually only in the super high speed that make it such a situation) only take the ring of lubrication and lubrication measures of static pressure lubrication with a double, while the value of such programmes is likely to make bearings of DMN break 3 million mark.
High temperature thermal expansion, or offsetting the mating surfaces of the normal pressure. Or combined with relaxation, so interference must be in consideration of the above factors carefully calculated under the premise of, effective interference at room temperature under constant speed for high speed bearing may be invalid.
If the result of this contradiction is too big (usually only in the super high speed that make it such a situation) only take the ring of lubrication and lubrication measures of static pressure lubrication with a double, while the value of such programmes is likely to make bearings of DMN break 3 million mark.
In considering the high speed bearing clearance should not only take into account all these factors, and taking into account the effect of thermal elongation of the shaft on clearance, required bearing in working condition, that is best at working temperatures of clearance, this clearance, the outer ball Groove Center, is exact on the formation of the State. Due to the high speed bearing sought to reduce the relative sliding and internal friction, it is best not to do the inner and outer rings to the relative displacement along an axis method to adjust the clearance of the ball bearing.
In considering when combined with interference and clearance of the bearing, pay attention to the deformation of materials under high temperature becomes soft and easy features, and many times from room temperature to high temperature caused by temperature change of a certain possibility of permanent deformation.
2. on the part of host requirements
Requirements for high speed bearing bearing dynamic balancing of rotating systems are precision, axis and hole mounting dimensions of the bearing position should be higher than the normal requirements of accuracy and precision, particularly with axes and abutments of the verticality of the hole or shaft, and when considering these issues, also must be noted when the bearing operation of high speed and high temperature factors.
Axis support system requires both high rigidity and light quality as much as possible, to overcome this contradiction, such as reduced surface roughness and surface hardening, such as measures to improve the support rigidity, with hollow shafts to reduce the quality.
1. coordination and clearance due to the high speed bearings for high speed bearing according to requirements of high-precision bearings and according to requirements of high-temperature bearing, so when you consider its fit and clearance, and to take into account the following points:
(1) size change when rising from room temperature to high temperature and hardness changes;
(2) high speed centrifugal force caused by the forces of change and shape change.
In short, at high speed and high temperature conditions, from coordination and clearance on select to strive to maintain the accuracy and performance of the bearing, it is difficult.
In order to ensure the Raceway and small deformation of bearing after installation, interference interference can not be made too large, and thermal expansion of high speed centrifugal force and under high temperatures or normal pressure of offsetting the mating surfaces. Or combined with relaxation, so interference must be in consideration of the above factors carefully calculated under the premise of, effective interference at room temperature under constant speed for high speed bearing may be invalid.
If the result of this contradiction is too big (usually only in the super high speed that make it such a situation) only take the ring of lubrication and lubrication measures of static pressure lubrication with a double, while the value of such programmes is likely to make bearings of DMN break 3 million mark.
High temperature thermal expansion, or offsetting the mating surfaces of the normal pressure. Or combined with relaxation, so interference must be in consideration of the above factors carefully calculated under the premise of, effective interference at room temperature under constant speed for high speed bearing may be invalid.
If the result of this contradiction is too big (usually only in the super high speed that make it such a situation) only take the ring of lubrication and lubrication measures of static pressure lubrication with a double, while the value of such programmes is likely to make bearings of DMN break 3 million mark.
In considering the high speed bearing clearance should not only take into account all these factors, and taking into account the effect of thermal elongation of the shaft on clearance, required bearing in working condition, that is best at working temperatures of clearance, this clearance, the outer ball Groove Center, is exact on the formation of the State. Due to the high speed bearing sought to reduce the relative sliding and internal friction, it is best not to do the inner and outer rings to the relative displacement along an axis method to adjust the clearance of the ball bearing.
In considering when combined with interference and clearance of the bearing, pay attention to the deformation of materials under high temperature becomes soft and easy features, and many times from room temperature to high temperature caused by temperature change of a certain possibility of permanent deformation.
2. on the part of host requirements
Requirements for high speed bearing bearing dynamic balancing of rotating systems are precision, axis and hole mounting dimensions of the bearing position should be higher than the normal requirements of accuracy and precision, particularly with axes and abutments of the verticality of the hole or shaft, and when considering these issues, also must be noted when the bearing operation of high speed and high temperature factors.
Axis support system requires both high rigidity and light quality as much as possible, to overcome this contradiction, such as reduced surface roughness and surface hardening, such as measures to improve the support rigidity, with hollow shafts to reduce the quality.
