Graphite sealing element frictional force and sealing pressure testing device and method

A graphite sealing and testing device technology, applied in the testing of mechanical parts, testing of machine/structural parts, measuring devices, etc., can solve problems such as high friction, failure to reach sealing pressure, difficult tool control, etc., and achieve service life. Long, reliable and intuitive effect

Active Publication Date: 2015-05-13
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the torque is too small, the designed sealing pressure cannot be reached, and when the torque is too large, it will cause excessive friction and make tool control difficult

Method used

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  • Graphite sealing element frictional force and sealing pressure testing device and method

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Embodiment Construction

[0024] In order to have a clearer understanding of the technical features, objectives and effects of the present invention, specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0025] Such as figure 1 As shown, the present invention provides a testing device 100 for graphite seal friction and sealing pressure. The testing device is provided with a hydraulic cylinder center tube 1 and a friction center tube 2, a hydraulic cylinder center tube 1 and a friction center tube 2 The outer diameters of the two are the same, and the internal spaces of the two communicate with each other and form a through-pipe inner space 3. The two ends of the pipe inner space 3 are respectively closed by threaded plugs 4; the plug 4 at one end is connected to the first pump 5 through the pipeline connection. The sliding sleeve close to the outer wall of the friction center tube 2 is provided with a friction outer tube 6, and between the inne...

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Abstract

The invention relates to a graphite sealing element frictional force and sealing pressure testing device. The graphite sealing element frictional force and sealing pressure testing device comprises a hydraulic central tube and a frictional central tube, an in-tube space is formed inside the hydraulic central tube and the frictional central tube, and both ends of the in-tube space are closed and connected with a first pump through pipes; a frictional external tube slidingly sleeves the outer wall of the frictional central tube; an accommodating space for accommodating graphite sealing elements is formed between the frictional external tube and the frictional central tube; communicating passages are formed between the accommodating space and the in-tube space; the frictional external tube is threadedly connected with a fastening nut; an external tube sleeves the hydraulic central tube; the first end and the second end of the external tube are threadedly connected with an upper connector and a lower connector respectively in a sealed mode; the outer wall of the hydraulic central tube is provided with a ring-shaped protrusion, which is attached to the inner wall of the external tube in a sealed mode to divide a ring-shaped space into a first cavity and a second cavity; the first cavity is connected with a second pump through pipes. The graphite sealing element frictional force and sealing pressure testing device can help obtain the corresponding relationship among the parameters of fastening torque, roughness, sealing pressure and frictional force.

Description

Technical field [0001] The invention relates to a testing device and a testing method for the performance of a graphite seal, in particular to a testing device and a testing method for the friction and sealing pressure of the graphite seal. Background technique [0002] Valves used in the petrochemical industry, and thermal packers used in the oil extraction industry, work in a high temperature and high pressure working environment. In this high temperature and high pressure environment, sealing is usually a difficult problem to solve, and the quality of the sealing effect directly affects the performance of the tool. However, in the high temperature and high pressure environment, the general O-ring seal cannot work normally, and the graphite ring is generally compressed for sealing at present. The graphite ring seal currently in use applies a certain torque to the graphite ring to compress the graphite ring and then seal it. However, the relationship between the torque and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/00
Inventor 田野
Owner PETROCHINA CO LTD
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