What are the advantages and disadvantages of deep groove ball bearings compared to plain bearings

First, with sliding bearings.

Compared to deep groove ball bearings.

Advantages: 1. The radial clearance is relatively small, and the centripetal angular contact bearing can be preloaded and the preload can be used to eliminate the clearance, and the operation accuracy is high;

2. Under general conditions, rolling bearings.

The efficiency is comparable to that of hydrodynamic lubrication bearings, but higher than that of mixed lubrication bearings;

3. For the shaft diameter of the same size, the width of the rolling bearing is smaller than that of the sliding bearing, which can make the axial direction of the machine.

Compact structure; 4. High degree of standardization, batch production, less lubricant consumption, easy sealing, easy maintenance, no need for useful non-ferrous metals, low cost.

Second, compared with sliding bearings, the disadvantages of deep groove ball bearings:

1. Vibration and noise are large;

2. The radial size is larger than that of sliding bearing;

3. Poor ability to withstand impact loads;

4. The bearing life is low under high-speed and heavy-load loads.

2. The radial clearance is relatively small, and the centripetal angular contact bearing can be preloaded and preloaded to eliminate the clearance, and the operation accuracy is high;

3. Under normal conditions, the efficiency of rolling bearings is comparable to that of hydrodynamic lubricated bearings, but higher than that of mixed lubricated bearings;

4. For the shaft diameter of the same size, the width of the rolling bearing is smaller than that of the sliding bearing, which can make the axial structure of the machine compact;

5. High degree of standardization, batch production, less lubricant consumption, easy sealing, easy maintenance, no need for useful non-ferrous metals, low cost.

Second, compared with sliding bearings, the disadvantages of deep groove ball bearings:

1. Vibration and noise are large;

2. The radial size is larger than that of sliding bearing;

3. Poor ability to withstand impact loads;

4. The bearing life is low under high-speed and heavy-load loads.

It is characterized by low frictional resistance and high rotational speed, and can be used for parts that bear radial load or combined load of radial and axial at the same time, and can also be used for parts that bear axial load.

Deep groove ball bearings are arranged in the raceway grooves on the inner and outer rings to form an arc, the radius of which is slightly larger than the radius of the ball. In addition to radial loads, axial loads in both directions can also be applied. It is suitable for applications with low friction torque, high-speed rotation, low noise and low vibration.

Types of deep groove ball bearings.

1. Deep groove ball bearing with dust cover.

Generally, it is used in the condition that it is difficult to lubricate alone, and it is inconvenient to place the lubricating oil circuit and check the lubrication situation, and the lithium grease that is usually injected into the bearing is 1 4 1 3 of the internal space of the bearing.

2. Deep groove ball bearings with sealing rings.

Its performance, grease filling, use and bearing with dust cover are basically the same, the difference is that there is a large gap between the dust cover and the inner ring, the gap between the sealing lip and the inner ring of the non-contact sealing ring is small, and there is no gap between the sealing lip and the inner ring of the contact sealing ring bearing, and the sealing effect is good, but the friction coefficient has increased.

3. There are stop grooves and deep groove ball bearings with stop rings.

In addition to the radial load function, the deep groove ball bearing with snap ring can also limit the axial displacement of the bearing, simplify the structure of the bearing seat and reduce the bearing size. Generally, it is mostly used in automobiles, tractors and other working parts with small axial load.

4. There are deep groove ball bearings with ball notch.

There is a notch in the inner and outer rings on one side, which allows more balls to be loaded and increases its radial load capacity. However, due to the small axial load capacity, it cannot run at high speeds. If there is a large axial load, it needs to be used in conjunction with general deep groove ball bearings.

Summary. 1. The similarities between the two are deep groove ball bearings and cylindrical roller bearings, which mainly bear radial loads and can bear a small part of the axial load. What is the difference between deep groove ball bearings and cylindrical roller bearings?

How to choose between the two? 2. The difference between the two is 1. The ultimate speed of deep groove ball bearings is high, the axial load bearing capacity is relatively large, and the radial load bearing capacity is relatively small. 2. The use limit speed of cylindrical roller bearings is not as high as that of deep groove ball bearings, and the analysis of metal stamping processing can not bear the axial load, but the radial load bearing capacity is relatively large.

What are the differences and similarities between cylindrical roller bearings and deep groove ball bearings? What was the basis for the choice?

1. The similarities between the two are deep groove ball bearings and cylindrical roller bearings, which mainly bear radial loads and can bear a small part of the axial load. What is the difference between deep groove ball bearings and cylindrical roller bearings? How to choose between the two?

2. The difference between the two is 1. The ultimate speed of deep groove ball bearings is high, the axial load bearing capacity is relatively large, and the radial load bearing capacity is relatively small. 2. The use limit speed of cylindrical roller bearings is not as high as that of deep groove ball bearings, and the analysis of metal stamping processing can not bear the axial load, but the radial load bearing capacity is relatively large.

1. The similarities between the two are deep groove ball bearings and cylindrical roller bearings, which mainly bear radial loads and can bear a small part of the axial load. What is the difference between deep groove ball bearings and cylindrical roller bearings? How to choose between the two?

2. The difference between the two is 1. The ultimate speed of deep groove ball bearings is high, the axial load bearing capacity is relatively large, and the radial load bearing capacity is relatively small. 2. The use limit speed of cylindrical roller bearings is not as high as that of deep groove ball bearings, and the analysis of metal stamping processing can not bear the axial load, but the radial load bearing capacity is relatively large.

How to choose between the two? Cylindrical roller bearings are preferred in the case of low speed and heavy load, and deep groove ball bearings are preferred in the case of high speed and light load.

Same: Both prevent the tilting of the rollers or the friction between the rollers, effectively preventing the increase of rotational torque.

Selection basis: on the parts that bear the radial load or the combined load of the radial and axial directions at the same time, it can also be used to select the deep groove ball bearing on the parts that bear the axial load. Cylindrical roller bearings are selected for bearing a certain degree of axial load in one direction.

The differences are as follows: First, the guidance is different.

1. Cylindrical roller bearing: It is a radial rolling bearing of cylindrical rollers. The internal structure of cylindrical roller bearings adopts rollers arranged in parallel, and the rollers are equipped with spacer retainers or isolation blocks.

2. Deep groove ball bearing: mainly used to bear radial load, but when the radial clearance of the bearing is increased, it has the performance of a certain angular contact ball bearing, and can bear the combined load of radial and axial directions.

Second, the characteristics are different.

1. Cylindrical roller bearing: the roller is in line contact with the raceway or the line contact is repaired, with large radial bearing capacity, which is suitable for bearing heavy loads and impact loads. The coefficient of friction is small, suitable for high speed, and the ultimate speed is close to that of deep groove ball bearings.

N-type and N-type can move axially, can adapt to the change of the relative position of the shaft and the shell caused by thermal expansion or installation error, and can be used as a free end support.

2. Deep groove ball bearing: deep groove ball bearing has a simple structure, and it is easy to achieve high manufacturing accuracy compared with other types, so it is convenient for mass production in series, and the manufacturing cost is also low, and it is very common to use. In addition to the basic type, deep groove ball bearings also have various variant structures.

Third, the application is different.

1. Cylindrical roller bearings: large and medium-sized motors, rolling stock, machine tool spindles, internal combustion engines, generators, gas turbines, reduction boxes, rolling mills, vibrating screens and lifting and transportation machinery.

2. Deep groove ball bearings: can be used in gearboxes, instrumentation, motors, household appliances, internal combustion engines, transportation vehicles, agricultural machinery, construction machinery, construction machinery, roller skates, yo-yos, etc.

The moving bearing has a large bearing capacity, good anti-vibration, long life and low noise. In particular, liquid-lubricated bearings can operate at very high speeds, with better vibration absorption, higher stability, higher rotation accuracy, and low friction resistance, so they can often show their characteristics best in high-precision, high-speed, heavy-load, and heavy-pulse occasions.

Answer]: Compared with sliding bearings, the main advantages of rolling bearings are slip: small friction factor, sensitive start-up and high efficiency; Simple lubrication and sealing; Standardized production, good interchangeability and bridge.

The main disadvantages are: poor anti-impact load pin waxing ability; High vibration and noise at high speeds; Limited working life; The radial dimensions are larger.

Compared with the skin height of the rolling rotten ruler bearing, () cannot be used as a sliding bearing in the following points.

a.Small radial dimensions.

b.Start the Rongli group easy.

c.Smooth operation and low noise.

d.It can be used at high speeds.

Correct answer: B

1. Long life, suitable for high speed;

2. Shock and vibration resistance; oil film vibration absorption;

3. The structure is simple and can be used for crankshafts;

4. High bearing capacity (heavy load).

Disadvantages: The starting resistance is large, and the lubrication and maintenance are more complex than rolling bearings.