Everyone knows that the speed of a car turbocharger is high. How high is it? The answer is 120,000 to 160,000 revolutions per minute. At such a high speed, the centrifugal force is proportional to the square of the angular velocity of rotation. Even if a grain of rice is heavier, the impeller, shaft and bearing will bear a huge weight. The principle is simple, but there are high requirements for the robustness and reliability of the material.
Turbocharger bearings are one of the key components for reliable operation of automotive turbochargers. Nowadays, floating bearings are commonly used in automotive turbocharger bearings.
Floating bearing is actually a ring sleeved on the shaft. A double oil film is formed between the ring and the shaft, the ring and the bearing seat. The ring floats between the shaft and the bearing seat with a gap of 0.05-0.1mm. , When the turbocharger is working, the bearing rotates between the bearing seat and the shaft.
Through the principle of the turbocharger, it can be known that when the turbocharger is running, an axial retraction force will be generated, the direction is towards the compressor side, and a thrust bearing is provided on the compressor side. The bearing is provided with oil holes to ensure that it is on the thrust surface. Cooling and lubrication.