End-face-sealed friction surface temperature measuring method

Abstract

The invention relates to an end-face-sealed friction surface temperature measuring method. N axial blind holes with the diameter of 1 are uniformly distributed and processed in the same diameter at the back of the seal face of a stationary seal ring along the circumferential direction; the distance from the bottoms of the blind holes to the end faces of a rotating seal ring and the stationary seal ring are respectively h1, h2..., hn mm; thermocouple temperature sensors are buried in the blind holes by adopting insulating glue; and the signal wires of the thermocouple temperature sensors are led out along the inner hole wall of an end cover of a sealed device. The temperatures measured in n positions in the testing process are regressed into a temperature-distance end face depth curve shown as the expression: T=f (h), thus the end face temperature in the position h=0, namely the end face friction temperature is obtained by utilizing an extrapolation method. The blind holes are formed, thereby ensuring the integrality of a seal end face; and the depths of the blind holes are not specially limited, thereby overcoming the difficulty in processing the blind hole which is infinitely close to a friction end face, and overcoming the influence of heat resistance on measurement. Thus, the end-face-sealed friction surface temperature measuring method has high measuring precision and good stability, and is suitable for a field device to monitor the end-face-sealed friction surface temperature and a testing device to measure various end-face-sealed friction surface temperatures.

Description

technical field

[0001] The invention belongs to the technical field of end face seal measurement and control, and in particular relates to a measurement technology for the friction temperature between seal end faces of an end face seal device, especially a test device for developing a new type of end face seal or evaluating its performance. Background technique

[0002] The end face seal is an important functional element for mechanical equipment to prevent leakage, save energy, and control environmental pollution. According to the different forms of the sealing surface, it is divided into flat and modified end faces. Due to its simple structure and stable performance, end face seals are widely used in devices in the fields of electric power, ships, aerospace, petrochemical and other fields. The connection state of the end face seal in the device is as follows: figure 1 shown. The power of the driving equipment usually adopts the main shaft 1-1 to pass through the end cove...

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