According to the rolling element structure, slewing bearings are divided into two series: crossed roller slewing bearings and four-point contact ball slewing bearings. According to the gear form, they can be divided into three types: without ring gear, with internal teeth, and with external teeth. , can install seals, pressure oil cups, and adjust the torque in a small range, and the accuracy can reach P5/P4/P2 levels to adapt to various types of working conditions.
Customized design and processing of various types of high-precision non-standard bearings with an outer diameter ranging from 20mm to 2000mm. We have been working with many universities and scientific research institutions for many years. Research institutes, high-end machine tool manufacturing companies, mechanical research institutes and other institutions cooperate to jointly develop major equipment and assist customers in sample and mass production.
The classification of slew plate bearings is as follows:
1. External ring gear slew plate bearing (XSA series)
p>2. Internal ring gear slew bearing (XSI series)
3. Crossed roller slew bearing (XSU series)
4. Four-point contact ball of external ring gear Slewing bearings (VSA series)
5. Four-point contact ball slewing bearings with internal ring gear (VSI series)
6. Four-point contact ball slewing bearings (VSU series)
7. Crossed roller slew plate bearings (XSU08 series)
Slew plate bearings can simultaneously bear large radial loads, axial loads and overturning moments and other comprehensive loads, integrating support, rotation, transmission, It has multiple functions such as fixing in one, and has a compact structure, easy installation and easy maintenance. It is usually used in heavy-load and low-speed situations such as cranes, excavators, rotary tables, wind turbines, astronomical telescopes, tank turrets and other devices. Applications Very extensive.
I feel like I’ve said it all but can’t grasp the point. Does the so-called size compare with the electric fan? There are two types of fan leaves. I have forgotten the specific theory, but the purpose of the fan is to generate greater wind, and the purpose of wind power generation is to make more use of wind energy and generate a force that makes it rotate, which is the direction generated by the curvature of the fan leaves. Side force. But there is a problem with wind energy. It blows over a large area. If the fan surface is too large, firstly, the force of pushing back is too great and the wind turbine will fall over. Secondly, the wind energy utilization rate is too low (the fan surface is too large). Most wind energy cannot be converted into side thrust). How to calculate it specifically can be read in a document. This knowledge is necessary for every document. Last year I built a small wind turbine. This part is part of the theory, but I really can’t remember it clearly. The fan blades used are only 12% efficient. Is it very big? His lateral pressure is too small compared to the vertical pressure. Moreover, the purpose of the fan is to generate wind in a larger area. Because the area is not enough, the function of swinging the head is added. I put this thing on the wind turbine without discussing whether it can be erected (this can be done by digging a deeper foundation and changing the bracket material. , to reduce the fan area - the entire large circle area, the science is to sacrifice a certain part of the performance in exchange for what you want most(the desired result), but the efficiency is really too low. As I said before, the efficiency of the small wind turbine I made is only about 12%, which is far behind the highest efficiency of 50+! !