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Stepped production of wound graphite gasket

A technology of wound gasket and manufacturing method, which is applied in the direction of engine sealing, engine components, mechanical equipment, etc., and can solve the problems that it is difficult to guarantee the performance of the gasket

Inactive Publication Date: 2002-10-23
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the wound gasket needs to be compressed to its optimal thickness to ensure that the gasket has sufficient assembly stress and good resilience performance, so as to ensure that the bolted flange connection is effective, otherwise, it is difficult to guarantee the performance of the gasket

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0005] The specific method for graded manufacturing of the graphite wound gasket of the present invention will be described in detail below in conjunction with the examples. Step 1: Determine the graded manufacturing parameters 1. The thickness of the steel strip and graphite strip can be determined according to the national standard GB4622.3-93 "Technical Conditions for Wound Gaskets", which can be 0.15~0.25mm and 0.3~1.0mm respectively. The general principle for choosing the thickness of the graphite ribbon is to gradually decrease with the increase of the pressure level. 2. Determination of the width of the steel strip and the graphite strip. For gaskets with a commonly used standard thickness of 4.5mm, the width of the steel strip is 5.1-5.3mm, and the width of the graphite strip is 6.0-6.2mm. 3. The forming angle of the steel strip is 75° to 80°, and the optimum value in this embodiment is 78°. 4. The winding tension force of the steel strip is recommended to be 10N-20N ...

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Abstract

The present invention provides a progressive production method of graphite wound gaskets, which is characterized by that according to the pressure classes of the flanges matched with gaskets the classification can be made, at the same time the influence of gasket diameter also is considered, so that the conventional gasket diameter can be divided into five classes, the pressure is divided into four classes, every diameter class is correspondent to four pressure classes, five diameter classes can be finely divided into 20 classes. According to the National Standard GB 4622.3-93 the steel band thickness, steel band width, graphite band thickness, graphite band width, steel band forming angle and steel band wound tension force parameters can be selected, and according to the formula for making graphite wound gaskets the wound tension force of 20 classes can be calculated.

Description

Technical field: [0001] The invention relates to a manufacturing method of a wound sealing gasket. Background technique: [0002] Spiral wound gasket is a kind of static gasket. At present, there is no standard pressure level and basis for the manufacturing process of this kind of gasket, that is, no matter what pressure level the gasket is suitable for, it is manufactured using the same process parameters. The main reason is that there is a lack of an effective grading method for wound gaskets in production, so that no matter the pressure is high or low, regardless of the allowable load of the bolt, the same winding parameters (thickness of filler, thickness of steel strip, winding force, etc.) are used for manufacturing. Sometimes even made empirically. However, the wound gasket needs to be compressed to its optimal thickness to ensure that the gasket has sufficient assembly stress and good resilience performance, so as to ensure that the bolted flange connection is effec...

Claims

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Application Information

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IPC IPC(8): F16J15/06F16J15/08F16J15/10
Inventor 仇性启周先军阎国超王宗明王丽娟陈彦泽
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)