Slewing drive, English name: Slewing drive, Chinese other names: rotary gear device, rotary drive, rotary speed reducer, rotary dial, mainly used in aerospace, tower cranes, excavators, construction machinery, satellite receiving systems, solar tracking system And many other industries. In particular, the rapid development of solar photovoltaic power generation industry in recent years has been widely used.
The size and size of the rotary drive are different. The size and type of the rotary drive are based on the approximate raceway diameter of the slewing ring: WD-080, WD-0130, WD-0170, WD-0223, WD-0343, WD-0419, WD- 0478, WD-0625 and other specifications, the domestic model naming standard according to the approximate raceway diameter of the slewing bearing, in inches (1 inch = 25.4mm), divided into: SE3, SE7, SE9, SE12, SE14, SE17, SE21, SE25 and other specifications. The "WD" in the foreign model designation means: the abbreviation of Worm and Drive; the "SE" in the domestic model designation stands for: the abbreviation of Slewing and Enclose. Whichever method is used, the corresponding mounting dimensions and performance parameters of each model are the same.
At present, there is no uniform standard for the actual use of the slewing drive in the solar industry. However, most of the actual use of the slewing drive is based on the actual area of ​​use of the solar panel. The commonly accepted standard is the name of the domestic model. The actual solar energy of the SE3 is used as an example. Board usage area: 3-5 m2, SE5 at 6-9 m2 SE7 at 10-17 m2, SE9 at 18-30 m2, SE12 at 31-45 m2, SE14 at 46-60 m2, SE17 at 61-95 m2 SE21 is 96-120 m2 and SE25 is 120-160 m2.
Of course, this is not an absolute standard. For reference, most of the manufacturers of slewing drives adopt the above standards to recommend reference standards for customer selection.
The main components of the slewing drive are: slewing ring, worm, casting base and some standard parts such as bearings. In the solar photovoltaic power generation industry, rotary drive devices are generally equipped with DC planetary gear motors or AC geared motors; hydraulic motors are mainly used as power drive systems on construction machinery.
The application of the slewing drive device in the silicon crystal battery assembly can meet the user's requirements. The tracking accuracy can be less than 0.3. However, the application requirements for the condensing tracking system are high, and it is difficult to meet the requirements. The progress of the tracking power generation system is below 0.1 degree, so there is an urgent need to develop a high-accuracy tracking rotary device on the market. Although some manufacturers of rotary drive devices believe that there can be no return clearance, they cannot be satisfied in actual use. Requirements, only slightly improved, high-precision slewing drives are urgently needed and are a bottleneck encountered in the industry. I believe there will be solutions in the near future.