metallurgy, plastics machinery and other industries.

Double row tapered roller bearing outer (or inner) as a whole. Two inner (or outer) face close to the middle spacers, clearance by the thickness of the spacer to adjust, and can also be used to adjust the thickness of spacer double row tapered roller bearings are preloaded.
Tapered roller bearings mainly bear radial diameter and axial joint load. Load bearing capacity depends on the outer ring raceway angle, angle greater carrying capacity. These bearings are separable bearings, rolling bearing according to the number of rows into single row, double row and four row tapered roller bearings. Single row tapered roller bearing clearance to be adjusted during installation the user; double row and four row tapered roller bearing clearance in the factory according to user requirements is given, not to be user adjusted.
Tapered roller Backing bearings have tapered inner and outer ring raceway, Tapered Roller arranged in between. All conical surface projection lines are the same point on the bearing axis together. This design makes tapered roller bearings particularly suitable for combined (radial and axial) loads. Most of the axial load bearing capacity is determined by the contact angle α; α angle increases, the higher the axial load capacity. Angle size calculation factor e; e larger the contact angle the greater the bearing axial load greater applicability.
Tapered roller Roller bearing are usually separated type, namely the belt roller and cage assembly of inner components can be composed with tapered conical outer inner (outer) installed separately.
Tapered roller bearings are widely used in automotive, mill, mining, metallurgy, plastics machinery and other industries.
Power transformer is the function of power transmission, voltage conversion and insulation isolation, as a major soft magnetic components, power supply technology and power electronics technology has been widely used. According to the size of the power transmission, power transformers can be divided into several files: 10kVA above for high-power, 10kVA ~ 0.5kVA to medium power, 0.5kVA ~ 25VA for the low-power, 25VA following micro-power. Different transmission power, power transformer design are not the same, it should be self-evident. It was based on its main function is to power transmission, the English name "Power Transformers" translated as "Power Transformer", in many literature is still in use. What is called "power transformer" or called "Power Transformer" is good? Pending technology terminology of authority to choose and decide.
In almost all electronic products should be used, it is simple in principle but according to different occasions (for different purposes) of the transformer winding process will be different requirements. The main function of the transformer: voltage conversion; impedance transformation; isolation; regulator (magnetic saturation transformers), etc., the general shape of the iron core transformer used with the E-and C-type core.
A transformer ---- stationary electromagnetic devices
A voltage-transformer can be converted into AC power with the frequency of another voltage AC power
The main components of the voltage is set in a core and two windings on the core.
Transformer
A coil connected to a power receiving AC power, is called the primary winding, also known as the primary winding.
A coil connected to the load, send AC power, is called the secondary winding, also known as the secondary winding.
The primary winding of the secondary winding