Small glare Any glare that is glaring is glare, and it is easy to adjust the eye. In severe cases, it can damage the retina and cause blindness. High-quality lighting technology must be equipped with special technical measures to eliminate direct and reflected glare on the luminaire. The light source should be diffused as much as possible, and the loss of light energy can be minimized. It is often said that the "soft" light enters people's field of vision. High illuminance The so-called illuminance, that is, the height of light emitted by the illuminator on the table. Properly high illumination without glare can make the eye feel relaxed when looking at objects. Uniform illumination Natural light has the best illuminance distribution. In the human visual observation range, the uniformity is 100% from the center to the edge, so that not only the visual effect is good, but also the long-term observation is not easy to fatigue. When the uniformity of illumination distribution of artificial light reaches 60% or more, it has little effect on human eye adaptability and visual effect. When the uniformity is less than 50%, the visual effect and visual fatigue of the human eye will be significantly worsened and aggravated. Observation function The purpose of lighting is to observe. If you provide deep convenience for observation, such as using special technology, you can install an excellent optical magnifying glass at the appropriate position of the desk lamp, which can make the eyes look easy and observe the naked eye. . Green lamps are coming out. In the information age, visual health is too important. To protect your eyes, you should not only pay attention to visual hygiene, but also ignore the use of light science. The incidence of eye diseases is on the rise, such as decreased vision, myopia, cataracts, etc., as well as "presbyopia" eyes, "green light" eyes occur in advance, except for a small number of genetic factors, mostly visual health The result of a combination of factors such as visual optics.
The full ceramic ball bearings listed below are supplied with rings and balls made from zirconium dioxide (ZrO2). These zirconia bearings are available as full complement (no cage) or with cages made from PTFE, PEEK or 316 stainless steel.
These are non magnetic, non-conductive and highly corrosion resistant to most chemicals although ZrO2 bearings are not recommended for prolonged contact with steam. Full complement bearings or those with a 316 stainless cage can be used up to 400°C while bearings with a PEEK or PTFE cage can cope with temperatures of up to 250°C. For temperatures below -70°C, PTFE or 316 stainless steel cages are preferred. Standard radial clearance for full ceramic bearings is C0 but other clearances can be supplied to order.
ZrO2 ceramic bearings are generally used for their extreme temperature capabilities, excellent corrosion resistance or non-magnetic properties. Other sizes can be supplied on request.
The Description of Ceramic Bearings: Cermic Ball Bearing,Full Ceramic Bearing,Hybrid Ceramic Bearing,Self-Aligning Full Ceramic Ball Bearing Shijiazhuang Longshu Mechanical & Electrical Equipment Trading Co., Ltd. , https://www.longsbearings.com
Compared to steel, Ceramic ball Bearings have many specific advantages. They offer superior corrosion and heat resistance, higher dimensional stability, and lower density, which facilitate high speed. Ceramics are superior to steel in heat and corrosion resistance, and are lightweight and extremely hard as well. Consequently, ceramic rolling bearings can be used in environments where conventional steel bearings cannot. That is to say, the superiority of these bearings makes it possible that they can be applied in some special environments.
Firstly, they can be used in corrosive environments. Compared to stainless steel bearings, hybrid and all Ceramic Bearing lasted three and twenty times longer respectively. It is presumed that water readily adheres to silicon nitride and forms a better lubrication film, leading to extended bearing life.
Secondly, they can be performed in corrosive agents. Generally, silicon nitride has excellent corrosion resistance. However, corrosion resistance varies depending on the type and quantity of sintering additives, and certain corrosive agents decrease in hardness and flexural strength. In such situation, it is can be proved that the carbide-based ceramic bearings are the most effective.
Thirdly, they can be used in high-temperature vacuum. An all-silicon nitride Ball Bearing with a self-lubricating laminated cage (mainly composed of MoS2) and with MoS2-coated rings and balls proved superior in durability in a high-temperature vacuum environment. Compared with the hybrid bearings, the all-ceramic bearing was superior in both dynamic frictional torque and life.
Fourthly, they can be performed with poor lubrication. As ceramics are extremely hard and have outstanding wear resistance, they outperform other materials in bearing life without lubrication. According to a test, the steel bearing seized within a short period while the hybrid and all 627 Ceramic Bearings, though sustaining wear, did not. And the all-ceramic bearing sustained considerably less wear than the hybrid bearing, indicating that its endurance life is much longer.