Their rollers and the outer wheels are arranged in a right angle intersecting intersecting. They can bear the load from all directions at the same time (such as axial, thrust or momentum hormones, etc.). Because of the linear contact between the roller and the track surface, the possibility of the axis to bear the load and the elastic deformation is very small. This type of bearing is widely used in industrial robots, working machines and medical facilities. It needs high rigidity, high speed and high speed to ensure precise occasions.
In cross roller bearings, cylindrical rollers are perpendicular to each other through spacer retainers on the top, so 1 cross roller bearings can bear all loads of radial load, axial load and torque load. Ring size is the minimum limit of miniaturization, especially very thin type is small size close to the limit, and has high rigidity, so the most suitable for use in industrial robot joint or rotating parts, machining center machine rotary table, hand rotating parts, precision rotary table, medical machine, metering device, IC manufacturing equipment etc.
1. Excellent rotation accuracy
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Jiang Yi, an academician of the Chinese Academy of Engineering and a professor at Tsinghua University, said that the air has different dry and humid temperatures and its ability to contain water vapor is different. Since the dry air can hold more water vapor, and the water evaporates into a gas, it absorbs heat. Therefore, the dry air can provide the required cooling capacity for the air conditioner during the process from the dry to the tide. The energy of this kind of dry air is “dry air energy†– this is inexhaustible, clean and pollution-free in the arid regions of northwest China.
After on-site inspection of the “Indirect Evaporative Cooling Water Machineâ€, “Indirect Evaporative Cooling Air Treatment Machine†and equipment operation site of Xinjiang Green Messenger Air Environment Technology Co., Ltd., the expert group organized by the Ministry of Construction believed that “dry air energy†was used as the driving energy source. The indirect evaporative cooling air conditioning system can save about 70% energy compared with the traditional air conditioner, and because of the continuous delivery of fresh air, there is no indoor pollution problem caused by the traditional air conditioner.
The equipment operation data of Xinjiang Green Messenger Air Environment Technology Co., Ltd. in Urumqi, Shihezi and Aksu show that the "dry air" air conditioning unit can control the indoor temperature of large buildings between 22 °C and 28 °C.
Zhang Fulin, director of the Science and Technology Department of the Ministry of Science and Technology of the Ministry of Construction, said that China has made important breakthroughs in the use of “dry air energy†and has a special significance in the current situation of heavy energy conservation and emission reduction in the construction industry. Scientific research institutions and enterprises that have undertaken the development of "indirect evaporative chillers" and "indirect evaporative refrigerating air handlers" should strive to enhance the competitiveness of products in terms of functions and costs, so that they can be widely promoted in the northwest region with abundant dry air resources. .
It is reported that the "dry air energy" indirect evaporative cooling air conditioning system has been promoted and applied in Xinjiang and other places nearly 1 million square meters.
The inner structure of the Cross Roller Bearing is arranged in 90 degrees perpendicular to each other by the roller.
The roller is equipped with a spacer or isolation block between the rollers to prevent the rolling of the rollers from being examined each other. In addition, the phenomenon of roller contact or locking will not occur. At the same time, because the inner and outer ring is a segmented structure, the clearance can be adjusted, even if the preload is applied, high accuracy rotation motion can also be achieved.
2. Simplification of operation and installation
The outer ring or inner ring, which is divided into 2 parts, is fixed together after loading the roller and the holder, so the operation is very simple.
3. Bear large axial and radial load
The roller is arranged vertically through the spacer retainer on a 90 degree V groove rolling surface.
4. Greatly save the installation space
The size of the inner and outer ring cross Roller Bearing is miniature minimal, especially ultra-thin structure is small size close to the limit, and has high rigidity, so the most suitable for industrial robot joints or rotating parts, machining center of the rotary table, the robot rotating parts, precision rotary table, medical instrument IC, measuring equipment, manufacturing device widely used.
5. high speed ability
6. reducing shaft length and machining cost, thermal expansion leads to a limited change in geometric size.
7. the nylon separator is used, the moment of inertia is low, the starting torque is low, and the angle degree is easy to control.
8. optimization of pretightening force, large rigidity, high precision of guiding roller
9. carbon steel provides excellent impact resistance and surface abrasion resistance
10. simple but fully lubricated
Dry air is also an energy source that can be used for air conditioning and refrigeration: the “dry air indirect evaporation chiller†jointly developed by Tsinghua University and Xinjiang First Company has recently passed the research and development results of the Ministry of Construction in Urumqi. Experts believe that this move marks an important breakthrough in the use of "dry air energy" in China.