Advantages and application of NTN bearing

2022年7月14日

Rolling fag bearings

2022年7月25日

IKO bearing limit speed

The speed of IKO bearing speed depends on some specific conditions

The speed of IKO bearing speed depends on some specific conditions .

including the stability or strength of cage structure, lubrication conditions of cage surface, centrifugal force and rotary force acting on the rolling element, manufacturing accuracy and other factors.

factors that limit the IKO bearing speed, such as seals and greases that seal IKO bearings.

The experience obtained from laboratory tests and practical applications shows that for technical reasons.

the cost of maintaining the operating temperature of IKO bearings at an acceptable level is too high, the high speed that IKO bearings can achieve is limited.

In the case of grease lubrication there are more other factors to be considered, such as the lubrication conditions of the guide guide surface of the cage and the shear strength of the lubricant.
These factors depend on the foundation of the grease and the thickener. The friction of some open ball IKO bearings is very low.
the reference speed listed in the product table may be higher than the limit speed.
In this case, it is necessary to compare the allowable speed and limit IKO bearing speed obtained by calculating IKO bearing, and take the lower value between them.
Please note that in order for IKO bearing to work normally at high IKO bearing speed, it must bear a given small load.
In the case of grease lubrication there are more other factors to be considered, such as the lubrication conditions of the guide guide surface of the cage and the shear strength of the lubricant.
These factors depend on the foundation of the grease and the thickener.
The friction of some open ball IKO bearings is very low, and the reference IKO bearing speed listed in the product table may be higher than the limit IKO bearing speed.
In this case, it is necessary to compare the allowable speed and limit IKO bearing speed obtained by calculating IKO bearing, and take the lower value between them.
Please note that in order for IKO bearing to work normally at high IKO bearing speed, it must bear a given small load.

In the case of grease lubrication • there are more other factors to be considered.

such as the lubrication conditions of the guide guide surface of the cage and the shear strength of the lubricant.

These factors depend on the foundation of the grease and the thickener.

The friction of some open ball IKO bearings is very low, and the reference speed listed in the product table may be higher than the limit speed.

In this case, it is necessary to compare the allowable IKO bearing speed and limit speed obtained by calculating IKO bearing.

take the lower value between them. Please note that in order for IKO bearing to work normally at high IKO bearing speed, it must bear a given small load.

The experience gained from laboratory tests and practical applications shows

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The experience gained from laboratory tests and practical applications shows that for technical reasons .

the cost of maintaining the operating temperature of IKO bearings at an acceptable level is too high, the maximum IKO bearing speed that ik0 bearings can achieve is limited.

Grease lubrication; There are more other factors to be considered, such as the lubrication condition of the guide guide surface of the cage and the shear strength of the lubricant.
These factors depend on the foundation of the grease and the thickener. The friction of the open ball ik0 bearing is very low.
the reference speed listed in the product table may be higher than the limit IKO bearing speed.
In this case, it is necessary to compare the allowable IKO bearing speed and limit IKO bearing speed obtained by calculating IKO bearing, and take the lower value between them.
Please note that ik0 bearing must bear a given minimum load in order to work normally at high IKO bearing speed. At very low IKO bearing speed.
It is impossible to form an elastic hydrodynamic lubrication film on the contact surface between the rolling element and the raceway.
In these applications, lubricants containing extreme pressure (EP) additives are usually used to swing back and forth. In the reciprocating motion mode, the direction of rotation of IKO bearings has changed before rotating one to one turn.
Because the IKO bearing speed of 1k0 bearing is zero at the moment of reverse rotation; Therefore, a good hydraulic lubrication film cannot be maintained.
In these cases, in order to obtain a boundary lubricating film that can bear the load; Lubricants containing EP additives should be used. Under the condition of reciprocating oscillation.
it is impossible to give a A specific rated IKO bearing speed or limited IKO bearing speed.
Because the maximum speed that can be achieved does not depend on heat balance; It depends on the inertia force acting on ik0 bearing.
During each reverse rotation; The rolling element may slide for a short distance due to inertia, resulting in wear between the rolling element and the raceway.
The allowable acceleration and deceleration depend on the quality of rolling elements and cages, the inflammation type and amount of lubricant used, working clearance and TKO bearing load.
For example, in the configuration of connecting rod tk0 bearing; 1k0 bearings with preload and lighter and smaller rolling elements are usually used.
It is impossible to give general guidance on the IKO bearing speed of reciprocating IKO bearings;
carefully analyze the movement according to individual situations.

Troubleshooting method of limit IKO bearing speed noise of IKO outer spherical bearing

Of course, in the monitoring and diagnosis of outer spherical bearing faults, the use of vibration is much easier and more reliable than noise.

Therefore, vibration is undoubtedly the main research direction.

However, this is no longer a problem of bearing itself, but a problem of bearing application, which should be another matter.

Due to the direct correlation between IKO bearing vibration and noise, it can be said to be synonymous under certain conditions.
so in production and use, “vibration reduction and noise reduction” are always connected together, “low vibration bearing” is often habitually called “low noise bearing”, which is why.
Controlling bearing noise by controlling IKO bearing vibration not only directly captures the source and causes of noise, but also because it is relatively simple to realize.
such as measuring vibration is less affected by environmental conditions, foundation vibration is easy to separate.
it is easy to be applied in production practice. The measurement noise requires high environmental conditions and low background noise.
it must be generally carried out in the anechoic room with high construction cost.
From the fact that peeling, indentation, corrosion, crack, wear, etc.
will be reflected in the vibration measurement of the outer spherical bearing, it can be seen that the bearing vibration is very sensitive to the damage of IKO bearing.
Therefore, the bearing can measure the vibration by using a special bearing vibration meter (frequency analyzer, etc.).
the specific abnormal situation can not be inferred from the frequency division.
Because the measured values are different due to the service conditions of the bearing or the installation position of the senson.

Troubleshooting methods of limit IKO bearing speed noise of IKO outer spherical bearing

it is necessary to analyze and compare the measured values of each machine in advance to determine the judgment standard.
The speed of IKO bearing is mainly limited by the temperature rise caused by friction heating inside IKO bearing.
When the speed exceeds a certain limit, the bearing will not continue to rotate due to burns, etc.
The limit speed of the outer spherical bearing refers to the limit value of continuous rotation without friction and heat causing burns.
Therefore, the limit IKO bearing speed of IKO bearing depends on various factors such as the type, size and accuracy of bearing, lubrication mode, material and type of cage, load conditions, etc.
The limit speed of various bearings when grease lubrication and oil lubrication are respectively contained in the size table of each outer spherical bearing.
its value represents the limit value of the speed of the standard designed bearing when rotating under general load conditions.
In addition, the lubricant may be superior to other properties but not suitable for high-speed rotation according to its type and brand.
In the process of using IKO bearing, due to improper operation, insufficient lubrication, rust and corrosion, and some other factors such as current, external materials, eccentricity, etc.
the service life of outer spherical bearing is greatly reduced.
in the process of using bearings, it is necessary for Guangdong Guangzhou Yuezhou trading company to remind everyone to have a sufficient understanding of the preventive measures of bearings.

From the requirements of IKO bearing speed, the following points can be determined:

Ball bearings have higher limit speed and rotation accuracy than roller bearings, so IKO bearing speed should be preferred at high speeds.
Under the condition of the same inner diameter, the smaller the outer diameter, the smaller the rolling element, and the smaller the centrifugal inertia force added by the rolling element on the outer ring raceway during operation.
it is suitable for working at a higher speed. Therefore, at high speed, it is advisable to choose IKO bearing speed with smaller outer diameter in the same diameter series.
If a bearing with small outer diameter is used and the bearing capacity cannot meet the requirements, the same bearing can be installed in parallel, or a wide series of bearings can be considered.
The material and structure of cage have a great influence on the bearing speed.
The solid cage allows a higher speed than the stamping cage, and the bronze solid cage allows a higher speed.

Limit speed and friction coefficient of bearing

The speed of the bearing is mainly limited by the temperature rise caused by friction and heat inside the bearing.
When the speed exceeds a certain limit, the bearing will not continue to rotate due to burns, etc.
The limit speed of the bearing refers to the limit value of continuous rotation without friction and heat causing burns.
Therefore, the limit speed of the bearing depends on the type, size and accuracy of the bearing, as well as the lubrication method, the quality and quantity of lubricant, the material and type of cage, load conditions and other factors.
the limit speed of various bearings when grease lubrication and oil lubrication (oil bath lubrication) are respectively contained in the bearing size table.
its value represents the limit value of the speed of the standard designed bearing when rotating under general load conditions (c/p>=13, fa/fr < =0.25).
In addition, the lubricant may be superior to other properties but not suitable for high-speed rotation according to its type and brand.

According to the requirements of working speed on bearings, let me tell you the following points:

Ball bearings have higher limit speed and rotation accuracy than roller bearings, so ball bearings should be preferred at high speeds.
Under the condition of the same inner diameter, the smaller the outer diameter, the smaller the rolling element.
the smaller the centrifugal inertia force that the rolling element adds to the foreign raceway during operation, so it is suitable for working at a higher speed.
Therefore, at high speed, it is advisable to choose bearings with smaller outer diameter in the same diameter series.
If a bearing with small outer diameter is used and the bearing capacity cannot meet the requirements, the same bearing can be installed in parallel, or a wide series of bearings can be considered.
The material and structure of the cage have a great impact on the bearing speed.
The solid cage allows a higher speed than the stamping cage, and the bronze solid cage allows a higher speed.
generally speaking, deep groove ball bearings, angular contact bearings and cylindrical roller bearings should be selected in working occasions with high speed;
Tapered roller bearings can be used at low speed. The limiting speed of tapered roller bearings is generally about 65% of deep groove ball bearings, 70% of cylindrical roller bearings, and 60% of angular contact ball bearings.
The limit speed of thrust ball bearing is low, so it can only be used at low speed.

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Advantages and application of NTN bearing

Rolling fag bearings

IKO bearing limit speed

The speed of IKO bearing speed depends on some specific conditions

The experience gained from laboratory tests and practical applications shows

Troubleshooting method of limit IKO bearing speed noise of IKO outer spherical bearing

Troubleshooting methods of limit IKO bearing speed noise of IKO outer spherical bearing

From the requirements of IKO bearing speed, the following points can be determined:

Limit speed and friction coefficient of bearing

According to the requirements of working speed on bearings, let me tell you the following points:

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