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Aerial Working Platform Worm Gear Slew Drive For Solar Tracker CE Certificate

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LUOYANG MONTON BEARING SCIENCE & TECHNOLOGY CO.,LTD.

Aerial Working Platform Worm Gear Slew Drive For Solar Tracker CE Certificate

Country/Region	china
City & Province	luoyang henan
Categories	Work Platforms

Product Details

The slewing drive is a gearbox that can safely hold radial and axial loads, as well as transmit a torque for rotating. The rotation can be in a single axis, or in multiple axes together.

Slewing drives are made by manufacturing gearing, bearings, seals, housing, motor and other auxiliary components and assembling them into a finished gearbox.

Introduction:

By adopting slewing bearing as its core component, slewing drive can bear axial force, radial force and tilting moment simultaneously. Slewing drive is widely applied in modular trailers, all types of cranes, aerial working platform, solar tracking systems and wind power systems.

Electric and planetary gearboxes can be designed according to customer’s requirements. Slewing drive has the advantage for saving space in facilities, max load capacity in a compact design, extensive lifespan, and reduced maintenance costs.

Glossary

1) Tilting Moment Torque: Torque is the load multiplied by distance between the position of load and the center of slewing bearing. If the torque generated by load and distance is greater than the rated tilting moment torque, slewing drive will be overturned.

2) Radial load: Load vertical to the axis of slewing bearing

3) Axial load: Load parallel to the axis of slewing bearing

4) Holding torque: It is the reverse torque. When the drive is rotating reversely, and parts are not damaged,

5) The maximum torque achieved is called holding torque.

6) Self-locking: Only when loaded, the slewing drive is not able to reverse rotate and thus called self-locking.

--Customer can choose the motor according to our already designed slewing drive connect dimension.

--We can design the connect structure according to customer’s motor connect dimension.

--We can help to provide the whole parts with Hydraulic motor, DC motor, AC motor, Stepper or Servo motor.
WEA series slewing drive,slew drive is a new series of slewing product, also named as slewing reducer. It is commonly composed of worm, slewing bearing, housing, motor adapter, end cap and other components. By adopting slewing bearing as its core component, slewing drive can bear axial force, radial force and tilting moment simultaneously. Comparing with SE series slewing drive, WEA series have the advantages of better protective performance, great transmission torque, better impact resistance and long working life.

WEA series slewing drive is widely applied in the relatively rotary parts of machinery and solar energy field. Solar tracking system Rotary chassis of aerial working machinery Truck crane Rock drill, drilling machine Grasping wood machine, code molding machine.

Model	External Dimensions					Installation Dimensions				Mounting Hole Data
Pdf.format	L1	L2	L3	H2	D0	D2	D3	D4	D5	n1	M1	T1	T2	n2	M2	T3
	mm									Inner Ring				Outer Ring
WEA9	424	330	180	108	360	175	146	222.5	270	15	M16	30	62	16	M16	30
WEA12	509	370	222.5	108	445	259	229	310	358	19	M16	30	62	18	M16	30
WEA14	544	380	240	108	480	295	265	342	390	23	M16	30	56	18	M16	30
WEA17	534	405	285	108	570	365.1	332	430	479.4	20	M16	32	62	20	M16	32
WEA21	762	483	350	130	693	466.7	425	540	574.2	35	M20	40	70	36	M20	40
WEA25	861	513	399	130	793	565	525	630	675	35	M20	40	70	36	M20	40

Model	Rated Ourput Torque kN.m	Tilting Moment Torque kN.m	Static Axial Load kN	Static Radial Load kN	Dynamic Axial Load kN	56Dynamic Radial Load kN	Holding Torque kN.m	Gear Radio	Output Speed RPM	Self-locking Gears	Weight kg
WEA9	8	33.9	550	205	130	110	38.7	62:1	＜3	Yes	53kg
WEA12	9.5	54.3	725	270	180	140	43	79:1	＜3	Yes	66.8kg
WEA14	10.8	67.8	920	343	220	190	48	86:1	＜3	Yes	75kg
WEA17	12.96	135.6	1110	414	268	220	72.3	104:1	＜2	Yes	96kg
WEA21	28.7	203	1595	596	340	270	105.8	90:1	＜1.5	Yes	172kg
WEA25	34.2	310	1850	690	440	320	158.3	104:1	＜1.5	Yes	202kg

Enclosed housing slewing drive, slew drive mainly apply to the relatively high condition for high requirement for dust-proof, rain-proof and aniti-corrosion occasion. Precision grade IP65.
Note

1.Different motors(AC,DC,Hydraulic) can be designed according to customer’s requirement.

2.Shaft opposite to motor can choose to be hex head or not hex head.

History
The slewing drive is a modernized take on the worm drive mechanism that dates back many centuries and was widely used during the Renaissance Era. Pappus of Alexandria (3rd century AD),

a Greek mathematician is credited for an early version of the endless screw, which would later evolve into the worm drive.This mechanism was also used by Leonardo da Vinci as a component in many

of his designs for machines.It can also be found in the notebooks of Francesco di Giorgio of Siena.Many slewing drive concepts found prominence with the emergence of larger scale construction and

engineering in the height of the Greek and Roman Empires.

Technology
Traditional worm gear with a 4-start worm.

Slewing drives function with standard worm technology, in which the worm on the horizontal shaft acts as the driver for the gear. The rotation of the horizontal screw turns a gear about an axis perpendicular to the screw axis.

This combination reduces the speed of the driven member and also multiplies its torque; increasing it proportionally as the speed decreases.The speed ratio of shafts depends upon the relation of the number of

threads on the worm to the number of teeth in the worm wheel or gear.

As technology has improved, more slewing drives are using hourglass worm technology, in which the worm is shaped to engage more teeth in the gear.This increased tooth engagement results in greater

strength, efficiency and durability.

Performance characteristics
Because of their multiple uses, slewing drives come in a variety of model sizes, performance ranges and mounting characteristics.

The drives are well suited for applications that require both load holding and rotational torque from the same gear box.

They can also be made with dual axes of rotation, (turning axes at the same time) or with dual drives on the same axis, (two worm threads driving the same ring gear in one axis).

Materials
The specifications for drives and gears varies depending on the material the gear is composed of. However, a majority of the drives and gears commonly used are composed of steel and phosphor bronze.

According to an extensive series of tests by the Hamilton Gear & Machine Co., chill-cast nickel-phosphor bronze ranked first in resistance to wear and deformation. Number two on the list was SAE No. 65 bronze.For bronze gears a good casting should have the following minimum physical characteristics:

Applications
There are many applications in which the slewing drive can be utilized, primarily because it is perfect for applications that require both load-holding power and rotational torque strength.

Typical slewing drive applications include but are not limited to:Solar trackers,wind turbines,Man lifts,Hydraulic Machinery, Telescopic Handlers, Digger Derricks, Lifts, Cranes, Drilling equipment, Military Equipment.