How to classify eccentric bearings? How to look at the model of eccentric bearing

One is a double-layer double-row tapered roller eccentric bearing;

Cylindrical rollers are single-layer raceway cylindrical roller bearings with small clearance or negative clearance, which are mainly installed on both sides of the printing plate cylinder and the embossing cylinder of the printing machine;

The other is a double-layer raceway with an eccentric negative clearance cylindrical roller bearing unit with internal and external eccentricity, which is installed on both sides of the rubber cylinder of the printing press.

Due to its special structure, hollow cylindrical roller bearings have strong vibration absorption capacity, long precision life and overload protection functions compared with conventional rolling bearings.

Summary. Eccentric bearing designations are usually made up of letters and numbers, with different letters and numbers representing different specifications and characteristics. Here are some common eccentric bearing models and their meanings:

YET: Spherical eccentric bearings for SKF. Among them, "Y" stands for spherical shape, "E" stands for reinforced type, and "T" stands for eccentric sleeve.

sa: represents the length and size of the eccentric sleeve, usually a number representing the aperture size is added at the end, such as: represents the internal structure of the eccentric sleeve, where "h" represents the flange shape, "c" represents the spherical shape.

AEL: Represents the spherical bearing with eccentricity function launched by NTN company, where "A" represents the spherical surface of the outer ring with a fitting eccentric device, "E" represents the reinforced type, and "L" represents the light duty type. na：

Represents bolt type eccentric bearing, where "N" represents bolt type and "A" represents the main structure of the bearing.

Eccentric bearing designations are usually made up of letters and numbers, with different letters and numbers representing different specifications and characteristics. Here are some common eccentric bearing models and what they mean: yet:

Spherical eccentric bearings for SKF. Among them, "Y" stands for spherical shape, "E" stands for reinforced type, and "T" stands for eccentric sleeve. sa：

Representing the length and shape of the eccentric sleeve, the number representing the aperture is usually added at the end, such as: representing the internal structure of the eccentric sleeve, where "H" represents the flange shape and "C" represents the spherical appearance. ael：

On behalf of NTN company, the spherical bearing with eccentricity function is launched, in which "A" represents the spherical surface of the outer ring with a fitting eccentric device, "E" represents the enhanced type, and "Noisy L" Daichang wheel watch light duty type. NA: stands for bolt-type eccentric bearing, where "N" represents bolt-type and "A" represents the main structure of the bearing.

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The common models listed above.

There are many bearings commonly used in automobiles, and from the perspective of the use position, there are mainly the following three:

1. Wheel bearings

The wheel bearing is mainly load-bearing and precisely guides the rotation of the hub, which bears both axial and radial loads, and is a very important component.

Second, the clutch release bearing

Clutch release bearing is a more important part of the automobile, it is installed between the clutch and the transmission, the separation bearing seat is loosely sleeved on the tubular extension part of the bearing cover of the first shaft of the transmission, through the return spring to make the shoulder of the sensitive release bearing always against the release fork, and retreat to the last position, and the end of the release lever (separation finger) to maintain a clearance of about 3 4mm.

Because the clutch pressure plate, the release lever and the engine crankshaft run synchronously, and the separation fork can only move axially along the clutch output shaft, it is obviously not possible to directly use the separation fork to dial the separation lever, and the release lever can be made to move along the clutch output shaft axially while rotating through the separation bearing, so as to ensure that the clutch can be engaged smoothly, the separation is soft, and the wear is reduced, so that the service life of the clutch and the entire transmission train can be extended.

3. Sliding bearings

Plain bearings can be classified as follows:

According to the bearing structure: round bearing, elliptical bearing, three-leaf bearing, stepped bearing, tilt pad bearing and foil bearing, etc.

According to the type of lubricant: oil-lubricated bearings, grease-lubricated bearings, water-lubricated bearings, gas bearings, solid lubricated bearings, magnetic fluid bearings and electromagnetic bearings.

According to the direction of the load that can be carced: radial (centripetal) plain bearings and thrust (axial) plain bearings.

According to the bearing material: bronze bearing, cast iron bearing, plastic bearing, gemstone bearing, powder metallurgy bearing, self-lubricating bearing and oil-impregnated bearing.

According to the thickness of the lubricating film: film lubricated bearings and thick film lubricated bearings;

Plain bearings are bearings that work under sliding friction. It has many advantages, such as: smooth operation, reliable and noise-free.

Under the condition of liquid lubrication, the sliding surface is separated by the lubricating oil without direct contact, so that the friction and surface wear are reduced, and the oil film has a certain vibration absorption ability. However, the friction resistance is relatively large when starting.

Plain bearings are generally used in low-speed and heavy-load conditions, or in operating parts where maintenance and lubrication are difficult. The part of the shaft that is supported by a bearing is called a journal, and the part that matches the journal is called a bearing. The bearing lining is a layer of anti-friction material, which is a layer of material that is cast on the inner surface to improve the friction properties of the bearing surface.

The bearing of the branch belt is divided into split type and integral structure. The material of the bearing pad and bearing lining is collectively referred to as the sliding bearing material.

Millions of car purchase subsidies.

The first is the limitation of size. Often, the space in which bearings can be mounted is limited. In most cases, the shaft diameter (or bearing bore) is limited by the mechanical design or other design.

Therefore, the choice of bearing type and size is determined according to the inner diameter of the bearing. As a result, the main size tables of standard bearings are compiled according to the international standard bore dimensions.

The size of the standard INA bearing is varied, in the design of the mechanical device is best to use the standard bearing (this design to the bearing is easy to purchase, here to say a digression, some imported bearing catalog on the model does have, but some non-standard bearings in Chinese mainland is not in stock, sometimes ** will be a long time, so in the bearing selection to consider the cost of time and the cost of later replacement) bearing load, the load applied to the bearing, its nature, size, direction is changeable. Typically, the base load rating is shown on the size chart. However, axial load and radial load are also important factors in selecting suitable bearings.

When ball and needle roller bearings are of comparable size, needle roller bearings usually have a higher load capacity and are subject to greater vibration and shock loads.

The allowable speed is determined according to the type of bearing, size, accuracy, cage type, load, lubrication method, and cooling method. The allowable speed of standard precision bearings under oil and grease lubrication is listed on the bearing table. In general, deep groove ball bearings, self-aligning ball bearings and cylindrical roller bearings are suitable for high-speed operation.

Bearing tolerances, bearing dimensional accuracy and rotational accuracy are based on ISO and JIS standards. For machinery that requires high precision and high speed, bearings with an accuracy of 5 or more are recommended, while deep groove ball bearings, radial thrust ball bearings, or cylindrical roller bearings are suitable for machines with high running accuracy. Rigidity, when the rolling elements and raceway contact surfaces of the bearing are compressed, elastic deformation will occur.

Some machines need to minimize elastic deformation. Roller bearings produce less elastic deformation than ball bearings.

Installation and disassembly, some applications require frequent disassembly and installation to ensure that regular inspection and maintenance can be carried out. Bearings that can be mounted separately in the inner and outer rings, such as cylindrical bearings, needle roller bearings, and tapered bearings, are ideal for this application.

Self-aligning ball bearings and self-aligning roller bearings with tapered bore also simplify the installation procedure with the help of bushings.