Cycloidal gear motor BWD2(12) i=17 2.2kw

Cycloidal gear motor BWD2(12) i=17 2.2kw

Cycloidal gear motors BWD - this is a high quality of manufacture and ease of operation.

Models:

• BWD1 BWD2 BWD3 BWD4 BWD5 BWD6 BWD7 BWD8 BWD9 BWD10 BWD11 BWD12

The coefficient of speeds:

9   11   17   23   29   35   43   59   71   87

Cycloid transmission (planetary-terminal) differs from others in that 67% of the tooth area of cycloidal discs is in contact at any given time. This allows the cycloid transmission to withstand the highest impact loads, which can be up to 500% of the rated torque of the gearbox.

Any other type of transmission has an overlap coefficient ten times less, as a result of which manufacturers of general industrial drives focus on an overload capacity of no more than 200% of the rated torque.

Features of the cycloidal gearbox

• High extraction coefficient and high level of efficiency
• If the cycloidal gearbox is equipped with a single-stage transmission, the exhaust coefficient can reach up to 1:87 and the efficiency will be more than 90%. If this transmission equipment is equipped with multi-stage control, the exhaust coefficient will be higher.
• Compact structure and small size.
• The cycloidal gearbox is equipped with the principle of planetary control, the input and output shafts are located on the same axis, so the gearbox has a small size.
• Smooth running and low noise.
• Reliable performance and long service life.
• The main components of the cycloidal gearbox are made of high-carbon chrome-plated steel material and these products have a high level of strength. Moreover, the friction of the second kind of some gear contacts makes the gearbox durable.
• The cycloidal gearbox has a rational design and is easy to maintain.

Cycloid pinion gear motor

The cycloid coaxial gearbox, operating on the principle of a planetary drive with a small tooth difference, as well as the engagement of a cycloid pinwheel, is an innovative transmission equipment and drive gearbox widely used in the field of textile printing, light and food industries, metallurgy, mines, petrochemical industry, lifting and transport, engineering equipment, etc.

Specifications

• Highly standardized modular design
• High-grade materials ensure the durability of the product
• High strength, compact design
• Long service life
• Low noise level
• High efficiency
• Large radial load capacity
• Axial load up to 5% of radial load

How does the planetary gear reducer work?

The rotation from the electric motor is transmitted by means of an involute transmission to the eccentric shafts of the cycloid discs. Depending on the gearbox size and its design, there may be two or three eccentric shafts.

Needle bearings are mounted on eccentric shafts, on the outer cage of which cycloid discs are supported. Cycloid discs are supported through roller angular contact bearings on the input shaft and on the flange of the gearbox. Cycloidal discs perform a complex movement – plane-parallel rotation and rotation around their axis. At the same time, the peripheral surface of the disks describes a mathematical curve – a cycloid, which is where the second (Europeanized) name of this type of gearboxes came from. Making such a complex movement, the pins (teeth of the cycloid gear) enter the corresponding slots on the gearbox housing. The eccentric shafts spun by the input shaft of the gearbox around their axis due to the plane-parallel movement of the cycloidal discs are forced to move along a concentric circle in space, thereby turning the flange of the output shaft of the gearbox.

The use of planetary gearboxes

The principle on which the cycloid gearbox works was back at the beginning of the last century. However, the level of technology at that time did not allow manufacturing parts with the required accuracy. Now, taking full advantage of the capabilities of modern technological equipment, it is possible to realize the key advantages that distinguish the cycloidal gearbox. Exactly:

• High efficiency, up to 90%. And, therefore, low friction and heating losses;
• The possibility of implementing both very low and very high gear ratios in one stage;
• The minimum possible number of steps, which entails record compactness and minimum weight;
• Low noise level and low moment of inertia;

The load distribution inside the gearbox allows for high wear resistance and the ability to withstand five-fold overloads compared to the rated torque. 

There are many design options for a cycloid gearbox: The high-speed shaft rotates two or three eccentrics, which roll cycloidal discs along the inner surface of the gearbox housing. The more correct name for the teeth of cycloidal discs is caps, hence their second name – planetary gearboxes. 

If, during rolling, the cycloidal discs move clockwise inside the gearbox housing, then at the same time they slowly rotate counterclockwise around their own axis. 

This rotation is transmitted to the output shaft of the gearbox by means of the drive pins. The gear teeth of conventional gearboxes work on bending. The elements of the pinion gearbox work on compression, which causes a significantly higher margin of safety. In addition, the configuration of the cycloidal discs and the inner surface of the stationary gear ring ensures simultaneous contact of up to 66% of the teeth at any given time. This fact causes high resistance to shock overloads, reaching 500% of the nominal