WE SERIES SLEW DRIVE
| TYPE |
Parameter |
| Output torque |
Overturning moment |
Holding torque |
Axial static load |
Radial static load |
Axial dynamic load |
Radial dynamic load |
Reduction ratio |
Accuracy class |
Weight |
| WE9 |
8 kN.m |
35.6 kN.m |
38.7 kN |
578 kN |
215 kN |
136 kN |
115 kN |
62:1 |
<=0.15° |
48.5 Kg |
| 5904 lbf.ft |
26300 lbf.ft |
29000 lbf.ft |
129900 lbf |
48300 lbf |
30600 lbf |
25900 lbf |
| WE12 |
9.5 kN.m |
57 kN.m |
43 kN |
760 kN |
280 kN |
190 kN |
148 kN |
79:1 |
<=0.15° |
61 Kg |
| 7011 lbf.ft |
42100 lbf.ft |
32000 lbf.ft |
17100 lbf |
62900 lbf |
42700 lbf |
33300 lbf |
| WE14 |
10.8 kN.m |
71.2 kN.m |
48 kN |
960 kN |
360 kN |
230 kN |
200 kN |
86:1 |
<=0.13° |
68 Kg |
| 7970 lbf.ft |
52600 lbf.ft |
35000 lbf.ft |
215800 lbf |
80900 lbf |
51700 lbf |
44900 lbf |
| WE17 |
12.96 kN.m |
142.4 kN.m |
72.3 kN |
1166 kN |
435 kN |
280 kN |
231 kN |
104:1 |
<=0.1° |
90 Kg |
| 9564 lbf.ft |
105000 lbf.ft |
53400 lbf.ft |
262000 lbf |
97800 lbf |
62900 lbf |
51900 lbf |
| WE21 |
28.7 kN.m |
203 kN.m |
105.8 kN |
1598 kN |
640 kN |
385 kN |
335 kN |
90:1 |
<=0.1° |
169 Kg |
| 21180 lbf.ft |
150000 lbf.ft |
78100 lbf.ft |
359000 lbf |
144000 lbf |
87000 lbf |
75000 lbf |
| WE25 |
34.2 kN.m |
310 kN.m |
158.3 kN |
2360 kN |
945 kN |
590 kN |
470 kN |
104:1 |
<=0.1° |
199 Kg |
1.The slewing drives of outstanding quality are forged with stringent standards.
Quality is the lifeline of Luoyang Longda Bearing. We are fully aware that even the slightest defect may lead to serious consequences. Therefore, starting from the strict screening of raw materials, we have embarked on the ultimate pursuit of quality. All the raw materials entering the factory have to undergo multiple inspections to ensure that their quality fully meets the requirements.
During the production process of the slewing drives, the company has introduced an advanced quality management system to ensure that there are detailed inspection records and accurate raw material analysis reports for each process. We have also successfully passed the ISO 9001 quality management system certification in Germany.
2.Thoughtful service ensures worry-free after-sales.
"Elaborate manufacturing and serving the global" is by no means a self-righteous slogan, but an action guide deeply engraved in the hearts of every Longda employee. We have a professional, enthusiastic and energetic elite team. Whenever customers encounter problems in slewing drive product selection, installation and commissioning, or after-sales maintenance, they can obtain all-round technical support and solutions at the first time.
3.The SE series slewing drives are integrated slewing transmission devices that organically combine slewing bearings, reducers, brakes, motors and other components together. They can provide precise and reliable slewing motion control for various types of equipment and are widely used in fields such as construction machinery, solar power generation, port machinery and building machinery.
Slewing Drive: Outstanding Performance, Driving Unlimited Possibilities
In the era of rapid development of industrial automation today, slewing drive, as a crucial mechanical transmission component, is playing an indispensable and important role. With its unique design and excellent performance, it is widely used in numerous fields, endowing various mechanical equipment with precise, stable, and efficient slewing motion capabilities.
I. Basic Principle of Slewing Drive
The core working principle of the slewing drive is based on gear transmission. It generally consists of an inner ring gear, an outer gear, a slewing bearing, a driving device, and other parts. The outer gear is connected to the power source. When the power is activated, the outer gear starts to rotate and transmits the slewing motion to the slewing bearing through meshing with the inner ring gear, thereby driving the load to achieve a smooth rotation. This structural design enables the slewing drive to bear large radial forces, axial forces, and overturning moments, providing a solid guarantee for the reliable operation of large mechanical equipment under complex working conditions.
II. Outstanding Performance Highlights
(I) High Load-bearing Capacity
The slewing drive possesses remarkable high load-bearing characteristics. Whether it is the huge axial load when a heavy-duty crane lifts tens or even hundreds of tons of heavy objects, or the overturning moment that a wind turbine withstands in the howling wind, the slewing drive can handle them with ease. It uses high-strength alloy steel materials to manufacture the ring gear and the gear, and through precise heat treatment processes, the surface hardness and core toughness are strengthened to ensure that under extreme heavy-load conditions, the components will not experience deformation, fracture, or other failure situations, guaranteeing the continuous and stable operation of the equipment.
(II) High-precision Slewing Drive
In many industrial scenarios, precise slewing positioning is of crucial importance. For example, when an industrial robot conducts precision assembly tasks, the slewing drive, relying on high-precision gear processing technology, can achieve a tooth surface meshing accuracy of up to the micrometer level. In combination with an advanced control system, it can achieve precise rotation at extremely small angles, and the repeat positioning accuracy error is controlled within a very small range, meeting the production processes with strict requirements for operational accuracy and greatly improving product manufacturing quality and consistency.
(III) High Reliability and Stability
Facing harsh operating environments, such as the dusty mine mining sites, the long-term and high-intensity continuous operation of port loading and unloading equipment, and the seawater erosion and wind and wave impacts on offshore platforms, the slewing drive demonstrates extremely high reliability with its excellent sealing design and robust structure. High-quality seals effectively block the intrusion of impurities such as dust, water, and salt into the interior, preventing lubrication failure and component corrosion; the integrated compact structural design reduces the risk of loosening of connecting components, ensuring stable slewing performance even during long-term and high-intensity operation, reducing equipment maintenance frequency and improving overall production efficiency.
(IV) Multiple Transmission Ratios Available
Different application scenarios have various requirements for slewing speed. The slewing drive is designed with multiple transmission ratios to provide users with flexible choices. On a material sorting conveyor line that requires rapid slewing adjustment, a slewing drive with a smaller transmission ratio can be selected to achieve high-speed and efficient steering actions, improving sorting efficiency; for large astronomical telescopes and other equipment with extremely high requirements for precision and slow slewing speed, a model with a large transmission ratio is adopted to ensure precise control during fine adjustments, meeting diverse industrial and scientific research needs.
III. Wide Range of Application Fields
(I) Construction Machinery
In the fields of construction machinery such as excavators, cranes, and loaders, the slewing drive is the key to realizing the flexible rotation of the upper part of the vehicle. With the slewing drive, the operator of an excavator can precisely control the digging bucket to perform excavation operations in different directions and quickly switch the digging angle, greatly improving excavation efficiency; a crane, by virtue of its stable load-bearing and high-precision slewing, can smoothly lift and transport heavy objects to the designated positions, ensuring the safety and order of the site. Whether it is the construction of high-rise buildings or the erection of bridges, it is inseparable from the strong support of the slewing drive.
(II) Wind Power Generation
As an important representative of clean energy, the nacelle of a wind turbine needs to adjust its angle in real-time according to the wind direction to obtain the maximum wind energy. The slewing drive is installed between the tower and the nacelle. In a complex and changeable outdoor environment, it can reliably bear the huge weight of the nacelle and blades, accurately track wind direction changes, ensure that the wind turbine is always in the optimal power generation state, contribute to the development of global green energy, and can operate stably even under extreme climatic conditions such as heavy rainstorms, low temperatures, and severe cold, ensuring the continuous output of electricity.
(III) Industrial Automation Production Lines
On automated production lines, such as the welding, painting, and assembly links in automobile manufacturing, the slewing drive provides precise motion control for various robotic arms and turntables. The robotic arms carry tools to quickly and accurately switch between different workstations. Through the precise slewing of the slewing drive, multi-angle processing and assembly of complex components are realized, significantly improving the automation degree and production efficiency of the production line, reducing labor costs, and simultaneously ensuring high-precision and consistent product quality.
(IV) Satellite Communication and Aerospace Equipment
At a satellite communication ground station, the slewing drive is used to adjust the direction of the parabolic antenna to accurately point at the satellite, ensuring stable signal transmission without being affected by the Earth's rotation and weather changes; the deployment and adjustment mechanism of the solar panels of aerospace vehicles also rely on the slewing drive. In the extreme space environment, it achieves precise orientation of the solar panels to continuously supply power to the vehicle, facilitating humanity's great journey of exploring the universe. Its high reliability is one of the key guarantees for the success of aerospace missions.
IV. Key Points of Installation and Maintenance
(I) Installation Convenience
When designing the slewing drive, great consideration has been given to installation convenience. It usually adopts standardized installation interfaces and dimensions to adapt to various host equipment. Its compact structure reduces the installation space requirements, and detailed installation guidelines are attached, enabling technicians to complete the installation and commissioning work quickly and accurately. Some slewing drives also have self-positioning and self-calibration functions, further simplifying the installation process and shortening the equipment commissioning period.
(II) Simple Daily Maintenance
To ensure long-term stable operation, the daily maintenance of the slewing drive is relatively simple. Regularly check the sealing condition and replace worn seals in a timely manner to prevent impurity intrusion; according to the operating time and working conditions, quantitatively replenish high-quality grease to ensure good lubrication of the gears and the slewing bearing, reducing friction and wear; through daily inspections, pay attention to whether there are abnormal sounds and vibrations in the components, and detect and handle potential faults early to maintain the efficient operation of the equipment at a low maintenance cost.
V. Outlook on Development Trends
With the continuous progress of science and technology, slewing drives are also moving towards intelligence, lightweight, and high-performance. In terms of intelligence, built-in sensors monitor the operating status in real-time and transmit the data to the control system to achieve fault warning, automatic diagnosis, and adaptive adjustment, further enhancing the reliability of equipment operation and the level of intelligent management; lightweight design utilizes new materials and optimized structures to reduce self-weight while ensuring load-bearing capacity, reducing equipment energy consumption and transportation costs; the continuously improved high-performance indicators will meet the more stringent requirements for slewing transmission in emerging fields such as deep-sea exploration and high-speed rail transit in the future, continuously expanding the application boundaries and injecting a steady stream of power into global.
With its outstanding performance and wide adaptability, the slewing drive has already become the core transmission force in modern industry. Whether it is facilitating the upgrading of traditional industries or promoting breakthroughs in emerging technologies, it will continue to play a crucial role and write a glorious chapter in mechanical transmission in different fields.
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2.Thoughtful service ensures worry-free after-sales.
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