1. Working principle of right-angle planetary gearboxes
The working principle of right-angle planetary gearboxes is based on the special design of planetary gears. Planetary gears can not only rotate around their own rotation axis (autorotation) like fixed-axis gears, but also rotate around the axis of other gears (revolution) with the planetary carrier. This design enables the gearbox to achieve efficient transmission when the input shaft and output shaft are at right angles.
2. Basic structure of planetary gearbox
1. Planet carrier: The planetary carrier is a disc-shaped structure with three shafts evenly fixed on it. These shafts are distributed at an angle of 120 degrees and remain parallel to each other. The rotating shaft of the planetary carrier is installed inside the bearing, and the other end is connected to the low-speed shaft flange, which is connected to the main shaft of the wind wheel.
2. Planetary gears: The three planetary gears are installed on the three shafts of the planetary carrier and can rotate freely around their respective axes, ensuring the flexibility and efficiency of the gearbox.
3. Ring gear: The ring gear is an internal gear whose internal teeth mesh with the planetary gears. When the planet carrier rotates, the planetary gear rolls along the inner teeth of the ring gear.
4. Sun gear: The sun gear is the high-speed output shaft, and its tooth design meshes with all planetary gears to ensure efficient transmission.
3. Advantages of right-angle planetary gearboxes
1. High-precision transmission: The continuous advancement of manufacturing technology has made the transmission accuracy of right-angle planetary gearboxes higher and higher. The use of advanced processing technology and precision assembly technology can control the tooth profile error of the gear within a very small range, thereby ensuring that the rotation accuracy of the output shaft reaches the micron level.
2. Diversified customization capabilities: Many manufacturers provide customized services for right-angle planetary gearboxes, and can adjust the reduction ratio, output torque, external dimensions and other parameters according to the special requirements of customers to meet different application requirements.
3. High efficiency and energy saving: The right-angle planetary gearbox adopts an efficient lubrication system and optimized internal structure design. The lubricating oil can form a good oil film between each friction pair to reduce energy loss; the reasonable structural layout reduces unnecessary mechanical resistance and improves the overall transmission efficiency.
4. Compactness and flexibility: Right-angle planetary gearboxes are simple in design, reliable in performance and extremely cost-effective. They can be integrated into applications through a variety of connection methods, providing a variety of installation options, increasing design flexibility. In addition, right-angle planetary gearboxes can be installed and used in any mounting position, which provides users with greater design flexibility.
5. High load capacity and long life: The planetary gear system of the right-angle planetary gearbox has a high load capacity and can work stably under heavy loads and challenging environments. Its design allows for lifetime lubrication, which further extends its service life.
6. Multiple installation methods: Right-angle planetary gearboxes usually provide a variety of installation methods, such as flange mounting, shaft mounting, etc., to meet different application requirements.
4. Selection principles of right-angle planetary gearboxes
1. Reduction ratio selection: First, you need to determine the required reduction ratio. The reduction ratio is the ratio of the input speed to the output speed. Selecting a suitable reduction ratio can achieve the required output speed. The selection of the reduction ratio should ensure that the value of the servo motor's rated torque multiplied by the reduction ratio is less than the rated output torque of the similar reducer provided in the product sample, and the required maximum working torque is less than 2 times the rated output torque.
2. Accuracy requirements: Select the appropriate accuracy level according to the application scenario's requirements for transmission accuracy. Accuracy levels are usually divided into general accuracy, high accuracy and ultra-precision levels. Users should select the appropriate accuracy level according to actual needs.
3. Power requirements: Select the rated power of the planetary gear reducer according to the power of the drive motor and the required output power in the application scenario. The rated power of the reducer should be greater than or equal to the required output power to ensure the normal operation of the equipment.
4. Reliability requirements: Select a planetary gear reducer with high reliability and long life. Reliability includes the quality of the reducer, the manufacturing process, the durability of the parts, etc.
5. Installation requirements: Consider the installation space and layout requirements of the planetary gear reducer and select the appropriate size and form. Right-angle planetary gearboxes usually have different installation forms, such as flange type, bearing type, flange bearing type, etc. Select the appropriate installation form according to the actual situation.
6. Maintenance requirements: Consider the maintenance requirements of the planetary gear reducer and choose a model that is easy to maintain and repair. Maintenance requirements include sealing performance, parts replacement, etc.
Source:https://plaza.rakuten.co.jp/yixing/diary/202505130000/