Cardan shaft flatness requirements and maintenance

For the speed-up gearbox doubly-fed generator set, the mechanical energy is transmitted from the input shaft of the gearbox connected to the hub, and the large torque energy input by the wind wheel is converted into a small rotation by the speed-up gearbox. The distance form is transmitted to the generator by the coupling. The drive system mainly includes high and low shafts, gearboxes, braking devices, etc. Brakes are divided into electromagnetic brakes, hydraulic brakes, and manual brakes, which are devices that stop the fan from working. The high-speed and low-speed shafts are connected with the gearbox and the generator through couplings.

The coupling has good vibration absorption effect and convenient maintenance. The diaphragm coupling is suitable for low-torque transmission. The function of the fan transmission system is to transfer the mechanical energy converted from the wind wheel to the generator for power generation. For the double-speed gearbox The feeder unit and gearbox are the key components of the transmission system and can be used to increase speed. For the permanent magnet direct drive unit, due to its relatively simple structure, it mainly refers to the transmission shaft and other components. In order to improve the fatigue life of the diaphragm, TC4 forgings have high requirements for the grades of the high-magnification structure and the low-magnification structure when processing the diaphragm. Many domestic titanium alloy manufacturers cannot meet this requirement. For diaphragm forgings, designers generally put forward high requirements for the flatness of the forgings shipped by the forging factory. In order to meet the flatness requirements of the forgings, some manufacturers use heat treatment or mechanical means after heat treatment to forcibly control the deformation of the forgings. Make the forging itself have a large internal stress, so that the processing produces stress release, causing a large amount of deformation of the forging, so that the forging is scrapped. At present, the use of titanium alloy materials in domestic flexible coupling equipment has just started.

Titanium alloy is an ideal flexible coupling material that has undergone long-term testing. It has low density, high specific strength, and certain corrosion resistance. These advantages can improve the overall performance of the product. In order to make titanium alloy materials more stable and more widely used in flexible coupling equipment, it is also necessary for users, design units, material development and production units, equipment manufacturers and maintenance manufacturers to work together to accumulate the use of titanium alloy materials for a long time. Data and experience. With the development of flexible coupling technology, the improvement of titanium alloy forging and processing technology, and the breakthrough of the bottleneck restricting the development of my country's titanium alloy industry, it is believed that the application prospects of titanium alloy materials in flexible coupling equipment are becoming wider and wider. .