The rolling bearing lubrication knowledge - bearing

Can also play the heat, reducing the contact stress, absorb vibration, to prevent corrosion, and so on. Bearing the commonly used grease lubrication oil lubrication and two classes. In addition, also have the use of solid lubricant lubrication. Choose which kind of lubrication, this is related to the speed of the bearing, the general use of rolling bearing dn value ( D for the rolling bearing inside diameter, mm; N as the bearing rotating speed; r / min) The speed of the bearing size. Suitable for grease lubrication and the dn value of the lubrication pump line column in the table below can be used for reference when selecting lubrication method. Suitable for grease lubrication and oil lubrication of dn value ( Table value x 104) ( mm·r/min) 1. Grease lubricated with grease is a kind of viscous gel material, so the lubricating film strength is high, can bear larger load, not easy to loss, easy to seal a fatliquoring can maintain quite a long time. Wave illegally bearing with fat mass general for bearing internal space volume of 1/3 to 2/3. For those inconvenience often add lubricant, or those who do not allow the loss of lubricating oil and cause pollution for industrial machinery products, the lubrication method is appropriate. Its disadvantage is that only applies to a low d. Value. Will be the main performance index of the grease for males and drop point. Bearing the dn value of large, load hours, choose the larger cone into the grease; Conversely, the smaller should choose whom grease. In addition, the working temperature of the bearing should be less than lubrication bulge hotspot, for mineral oil lubrication expansion, should be low 10 ~ 20 t; Should be low 20 ~ 30 ℃. 2. Oil lubrication in high speed under the condition of high temperature, grease lubrication can not meet the requirements can be used when the lubricating oil. Lubricating oil is the main features of viscosity, the higher the speed, should choose the lower the viscosity of lubricating oil; The greater the load, should choose the higher the viscosity of lubricating oil. According to the working temperature and dn value, can choose the viscosity of the lubricating oil should have value, then according to the viscosity of lubricating oil products directory to select the corresponding brand lubricating oil. Oil lubrication, the lubrication methods have the following kinds: 1) The oil bath lubrication bearing local into lubricating oil, when the bearing static, oil level should be higher than the lowest occupied the center of the body. Because this method is not suitable for high speed, stirring intense when the oil will cause a lot of energy loss, so that cause the oil and bearings overheating. 2) Drip lubrication is suitable for the need to ration oil bearing parts, drops of oil should be appropriately controlled, excessive oil liquid cause the increase of bearing temperature, to make the drops of oil flow, often use viscosity oil L - AN15 smaller total loss system. 3) Splash lubrication which is usually closed in the gear bearing lubrication methods, namely using the gear rotating sealing device of the bearing is in order to prevent dust, water, acid gas, and other debris into the bush and prevent loss of lubricant. Sealing device can be divided into two types: contact and non-contact.