General purpose motor

Large capacity, generally ready-made catalog motors are small and medium-sized equipment, typically ranging from 1 to 500 kilowatts. All common motor types have one thing in common, which is that their energy efficiency, reliability, and fault free operation are crucial to productivity.

Generally speaking, high-performance motor specific bearings integrate material and design innovation, which can extend the bearing's lifespan by 2-3 times. Their characteristics include:

Reduce friction, vibration, and noise levels

Improve operational accuracy

Improve load and speed levels

Adopting extremely clean steel and unique heat treatment process

Electric insulated bearings are special products in addition to sealing, standard bearings, and lubricating grease products, which can protect motors from stray currents and help improve motor performance.

Deep groove ball bearing

Deep groove ball bearings are the most widely used type of bearing and highly multifunctional. This type of bearing has the characteristic of low friction, optimized for low noise and low vibration, thus achieving high speed. They can adapt to radial and axial loads in two directions, are easy to install, and have lower maintenance requirements compared to other types of bearings.

Suitable for high-speed and ultra high speed applications, and requires almost no maintenance. It is a common type of bearing product in motor bearing applications.

In addition to the motor and generator industries, the application of deep groove ball bearings also includes:

Agriculture

Material transportation

Industrial gearbox

Food and Beverage

Industrial pump

Industrial fan

Two wheeled and three wheeled vehicles

Sedans and light trucks

Hybrid ceramic bearings

Hybrid ceramic bearings are assembled from bearing steel rings and bearing grade silicon nitride rolling elements (Si3N4), and the bearings have electrical insulation properties.

Silicon nitride rolling elements can provide higher bearing performance even under harsh working conditions, thereby extending the service life of bearings.

Hybrid ceramic deep groove ball bearing

Cylindrical roller bearings

There are various designs, series, variations, and sizes of cylindrical roller bearings. The main design differences lie in the number of roller columns and the design and materials of the inner/outer ring flanges and retainers.

Bearings can cope with the challenges of radial heavy loads and high-speed applications. Adapting to axial displacement (except for bearings with flanges on both the inner and outer rings), they provide high stiffness, low friction, and long service life.

Cylindrical roller bearings also offer sealed or split designs. In sealed bearings, the rollers are protected against contamination, water, and dust, retaining lubricant while eliminating contamination. This results in lower friction and longer service life. Split type bearings are mainly used for difficult to reach bearing configurations, such as crankshafts, which can simplify maintenance and replacement.

Characteristics and advantages

High load-bearing capacity

High stiffness

Allow radial displacement

Except for bearings with inner and outer ring flanges.

Low friction

Open edge design

Together with the roller end design and surface finish, it promotes the formation of a lubricating oil film, resulting in lower friction and higher axial load-bearing capacity.

Long service life

The logarithmic curve profile of the roller reduces the edge stress at the contact between the roller and the raceway, as well as the sensitivity to misalignment and axial deflection.

Improve operational reliability

The surface treatment of the contact surface between the roller and the raceway is beneficial for the formation of a hydrodynamic lubricating oil film.

Separable and interchangeable

The separation components of cylindrical roller bearings are interchangeable. This facilitates installation, disassembly, maintenance, and inspection.

INSULATED BEARINGS

For motors, generators, and related equipment, when there is current passing through the bearings, it poses a risk to these devices. This not only causes damage to the contact surface between the rolling elements and the raceway inside the bearing (electrocorrosion), but also leads to rapid deterioration of the lubricating grease. Another additional risk comes from high-frequency currents caused by inherent parasitic capacitance in motors and generators. If the equipment uses a frequency converter, the risk of damage will further increase.

The design of insulated bearings is used to prevent current from passing through the bearings. A layer of insulating aluminum oxide coating is sprayed on the inner surface of their inner ring or the outer surface of their outer ring through a complex plasma spraying process, and this insulation layer has high-quality smoothness. Compared to other insulation methods, insulated bearings are a highly cost-effective solution.

Bearing characteristics

Prevent electrical corrosion

By integrating insulation performance into bearings, insulated bearings can improve reliability and extend the normal operation time of machines by eliminating electrical corrosion problems.

High resistance

The minimum resistance of the alumina coating is 200M Ω and can withstand up to 3000 V DC voltage.

Consistent electrical performance

Plasma sprayed coatings typically have hygroscopicity, making it easy for condensed water to penetrate into the interior of the coating. To prevent this impact, the bearings are encapsulated with a unique sealing agent.

Angular contact ball bearing

The inner and outer raceway of angular contact ball bearings are offset relative to each other in the direction of the bearing axis. This indicates that this type of bearing is designed to carry combined loads, namely radial loads plus axial loads.

The axial load-bearing capacity of angular contact ball bearings increases with the increase of contact angle. The angle between the line connecting the contact point between the steel ball and the raceway on the radial plane (i.e. the direction in which the combined load is transmitted from one raceway to another) and the perpendicular line of the bearing axis.

The main applications of angular contact ball bearings are as follows:

Industrial pump

Industrial gearbox

renewable energy

compressor

Industrial motors and generators

Trucks, trailers, and buses

Metallurgical industry