| 摘要 |
Modern turbochargers use speed sensors to determine the shaft speed during operation. In order to replace a speed sensor in a turbocharger with journal bearings separated by a spacer the tip of the speed sensor must be withdrawn from a window in the spacer and replaced through the same window. If the spacer turns while the sensor is removed then the window will be out of alignment with the axis of the sensor and the sensor cannot be re inserted through the window. An insert is provided for preventing rotation of the window in the spacer while the sensor is withdrawn. The insert also prevents wear to the speed sensor from the fluctuating contact forces transmitted from the shaft to the bearing spacer and subsequently to the speed sensor. Accordingly the durability of the speed sensor is improved the rate of failure and need for sensor replacement is reduced. |
