Bearing use and storage

Core Tip: Precautions for use Rolling bearings have higher precision than general mechanical parts, so care should be taken when using them. 1) Keep the bearings and their surroundings clean 2) Careful use
Precautions for use
Rolling bearings have higher precision than general mechanical parts, so care should be taken when using them.
1) Keep the bearings and their surroundings clean
2) Careful and careful when using
If it is used carelessly to give the bearing a strong impact, the bearing will be injured, indented, broken and injured.
3) Use the right tools
4) Pay attention to the rust prevention of the bearing
Avoid using it in wet areas, and wear gloves if you don't get sweat on it.
5) Users should be familiar with bearings
6) Develop operating specifications for bearing use
a, the preservation of bearings
b, cleaning of bearings and their surroundings
c. Inspection of the size and processing quality of the installation site
d, installation work
e, post-installation check
f, disassembly work
g, maintenance (regular inspection)
h, lubricant supplement
Bearing storage
The bearings are coated with an appropriate amount of anti-rust oil and packaged with anti-rust paper. As long as the package is not damaged, the quality of the bearing will be guaranteed.
However, for long-term storage, it is recommended to store on a shelf 30cm above the ground at a temperature below 65% and a temperature of about 20 degrees Celsius. In addition, {TodayHot} storage places should avoid direct sunlight or touch with cold walls.
Bearing installation
Pre-installation precautions
1) Bearing preparation
Since the bearings are rust-proofed and packaged, do not open the package until installation.
In addition, the anti-rust oil coated on the bearing has good lubricating properties, and can be used directly for bearings for general purpose or for bearings filled with grease without cleaning. However, for instrument bearings or bearings for high-speed rotation, the cleaning oil should be washed with a clean cleaning oil. The bearing is prone to rust and cannot be placed for a long time.
2) Inspection of the shaft and the casing
Clean the bearing and the casing to confirm the burrs left by scratches or machining. There must be no abrasive (SiC, Al2O3, etc.) sand or chips in the outer casing.
Secondly, check whether the size, shape and processing quality of the shaft and the casing are in accordance with the drawings.
Before installing the bearing, apply mechanical oil to each mating surface of the tested shaft and the outer casing.
Bearing installation method
The mounting method of the bearing varies depending on the type of bearing and the fitting conditions.
Since the shaft is generally rotated, the inner ring and the outer ring can respectively adopt an interference fit and a clearance fit, and when the outer ring rotates, the outer ring adopts an interference fit.

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Bearing seal type

Core Tip: In order to keep the bearing in good lubrication condition and normal working environment, give full play to the working performance of the bearing and prolong the service life, it must have a suitable seal for the rolling bearing.
In order to maintain good lubrication conditions and normal working environment, fully utilize the bearing performance and extend the service life, the rolling bearing must have a proper seal to prevent leakage of lubricant and invasion of dust, moisture or other dirt. .

Bearing seals can be divided into self-contained seals and external seals. The so-called bearing self-contained seal is to manufacture the bearing itself into a device with sealing performance. Such as bearings with dust cover, sealing ring and so on. The sealing space is small, the installation and disassembly are convenient, and the cost is relatively low.

The so-called bearing-incorporated sealing performance device is manufactured into a sealing device having various properties inside the {TodayHot} such as the mounting end cap.

The choice of bearing seals should consider the following main factors:
1. Bearing lubricant and type (grease and lubricant);
2. The working environment of the bearing, the size of the occupied space;
3. The advantage of the support structure of the shaft allows angular deviation;
4. The circumferential speed of the sealing surface;
5. The working temperature of the bearing;
6. Manufacturing costs.

The external seal is divided into two types: non-contact type and contact type. The description is as follows:

1) Non-contact seal
A non-contact seal is one in which the seal does not touch its relatively moving parts and has a suitable clearance. This form of seal, which generates almost no frictional heat during operation, is free of wear and is particularly suitable for high speed and high temperature applications. Non-contact seals are commonly used in various forms such as gap type, labyrinth and washer type, and are used in different occasions.
The gap of the non-contact seal is preferably as small as possible.

2) Contact seal
A contact seal is a seal in which the seal is in contact with its relatively moving parts and has no gaps. Since the seal is in direct contact with the fitting, the friction is large during work, and the heat generation is large, which is easy to cause poor lubrication, and the contact surface is easily worn, thereby causing a decrease in sealing effect and performance. Therefore, it is only suitable for medium and low speed working conditions. Contact seals are commonly used in the form of felt seals, cup seals, etc., and are used in different applications.

According to the working conditions of the bearing and the working environment, the sealing degree is often used in engineering design to achieve a better sealing effect.

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