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End-face-sealed friction surface temperature measuring method

A friction surface and end-face sealing technology, applied in thermometers, measuring devices, measuring heat, etc., can solve the problems of difficulty in machining near-surface blind holes, poor measurement accuracy and reliability of end-face sealing friction surface temperature, and achieve good stability, The effect of high measurement accuracy

Active Publication Date: 2011-07-20
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention proposes a method for measuring the temperature of the friction surface of the end seal in order to solve the problems of poor measurement accuracy and reliability of the existing end seal friction surface temperature, difficulty in processing blind holes near the surface, etc.

Method used

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  • End-face-sealed friction surface temperature measuring method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment one: Image 6It is the installation state of the end face seal of a single hard static ring in the device. The main shaft 6-1 passes through the end cover 6-5 of the device to be sealed, and extends into the sealing chamber housing 6-13 of the device. The end cover 6-5 of the sealed equipment is connected with the sealing chamber housing 6-13 by bolts 6-4. The static ring 6-8 of the end face seal is supported in the inner hole on the right side of the end cover 6-5 of the sealed equipment, and the connection between the static ring 6-8 and the end cover 6-5 of the sealed equipment is realized by the O-ring 6-7. between the seals. The other end surface of the static ring 6-8 is in contact with the sealing end surface of the moving ring 6-9, and the other end of the moving ring 6-9 is supported by the elastic element 6-10 to obtain a certain end surface specific load; the elastic element 6-10 is composed of The moving ring seat 6-11, which doubles as the fun...

Embodiment 2

[0029] Embodiment two: Figure 7 It is the installation state of the end face seal with bellows rigid stationary ring in the device. The difference from Example 1 is that the structural form of the end face seal has changed. The original static ring 6-8 is changed to a bellows base 7-7, bellows 7-8 and static ring 7-10 assembly, and the original dynamic Ring 6-9, elastic element 6-10 and moving ring seat 6-11 change moving ring 7-11 into. The temperature measurement system at the end face of the static ring is still composed of thermocouple temperature sensors and the static ring; four thermocouple temperature sensors 7-9, 7-16 (there are two not shown in the figure) are evenly distributed circumferentially on the back of the static ring In the blind hole with a diameter of φ1 opened in the axial direction, the distance from the bottom surface of the blind hole to the friction end faces of the moving ring 7-11 and the static ring 7-10 is 1mm, 2mm, 3mm and 4mm respectively, an...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K7/04
Inventor 孙见君涂桥安刘士国徐静华洁李佳
Owner NANJING FORESTRY UNIV
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