Reducer bearings are special bearings used in all kinds of reducers. There are also self-aligning roller bearings used in large reducers, such as 24044, 24048 and so on. Cylindrical roller bearings are widely used in small reducers.
cylindrical roller bearing
Single row cylindrical roller bearing without outer ring
Single row cylindrical roller bearing without inner ring
Double row cylindrical roller bearing without outer ring
Reducer is a kind of power transmission mechanism, which uses the speed converter of gear to reduce the number of turns of power source to the required number of turns, and get larger torque. The bearing of reducer plays the role of supporting the gear shaft or connecting rod between rotation, because the cylindrical roller bearing can get continuous and stable supporting torque within the effective size range, And it has a certain amount of axial movement. Nu NJ type cylindrical roller bearings are usually installed in the supporting positions at both ends of the shaft, while double row eccentric bearings are used as the supporting positions in the reducer. Because they are not concentric up and down, smaller installation positions can be obtained, so that the reducer products can be small and lightweight
There are many types of reducer bearings, including rolling bearings and cylindrical roller bearings. There are many bearing series of reducer, such as SKF Bearing, FAG bearing, NSK bearing, NTN bearing and Timken bearing.
On the one hand, the function of the reducer bearing is to keep the gear lubricating oil inside the bearing from losing in use, so as to ensure that the bearing is in the lubricating state. On the other hand, it is to protect the dust or harmful gas outside the bearing from entering the bearing cavity, so as to prevent damage to the bearing. The bearing can support the gear shaft or connecting rod in the reducer.
In addition, the reducer model size is different, the bearing model is also different. Reducer is a kind of transmission mechanism, which needs to transfer torque to the working machine through shaft and bearing. Therefore, the transmission efficiency and quality is directly related to the bearing. The sliding quality and service life of the bearing will affect the overall quality and performance of the reducer.
Reducer is one of the main equipment of the enterprise. Once there is a fit clearance in the operation process, it will cause serious damage to the transmission shaft and transmission gear, and cause a major shutdown accident. The enterprise will suffer huge economic losses. Once the bearing chamber of reducer is worn, the replacement cost of components is high and the manufacturing cycle is long. The general repair method is machining after disassembly and repair welding or reaming and inlaying steel sleeve, which is time-consuming and expensive. In western countries, polymer composites are often used to solve the wear problem of reducer bearing housing
This kind of problem is generally difficult to repair and solve by repair welding process, the weldability of cast iron is not good, and it is easy to cause more serious secondary damage to the parts during welding, so the replacement cost is high and the time is long.