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Plasma-coated sealing elements

A technology of sealing components and plasma, which is applied in the direction of engine sealing, coating, engine components, etc., can solve the problems of sealing body wear, dynamic seals without lubricant research, etc.

Active Publication Date: 2019-12-17
CARL FREUDENBERG KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this has the disadvantage that although the wear of the sealing elements can be reduced, at the same time the sealing body is worn by abrasion
Dynamic seals using lubricants were not studied here

Method used

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  • Plasma-coated sealing elements
  • Plasma-coated sealing elements
  • Plasma-coated sealing elements

Examples

Experimental program
Comparison scheme
Effect test

example 10

[0103] Example 10: Determination of Surface Energy and Contact Angle

[0104] In order to determine the surface energy, contact angle measurements are carried out at the placed droplet. Here, the treatment was carried out analogously to the DIN 55660-2 standard of December 2011, except for the test climate. Measurements were performed at a temperature of 23-26°C. Water and diiodomethane were used as measuring liquids. According to the Owens-Wendt method, the surface energy was calculated based on the contact angles derived from the measurements. Here, the total surface energy is composed of polar and dispersed fractions.

[0105] Contact angle measurements were performed 1 day, 7 days and 30 days after the coating process. All surfaces were cleaned with ethanol before measurement. Since the matrix material is a multicomponent system, its individual components partially tend to migrate, and the measured value of the contact angle fluctuates around a maximum of 10° depend...

example 11

[0110] Example 11: Tribological properties without lubricant

[0111] To characterize the friction reduction of the coatings, coated and uncoated samples were moved on stainless steel plates (Ra = 1.062 μm) and subjected to the necessary force. For this, three specimens are placed into special holders which allow for each specimen a distance of approximately 6.5 mm from the counterpart 2 contact surface. The holder is laid down with the sample onto the counterpart and a mass of 1 kg is weighed out. The counterpart is then moved at a speed of 150mm / min and the force required to hold the holder in place is measured. The measurements were carried out three times sequentially and the average values ​​are summarized in Table 5. The results showed that the coating significantly improved the friction properties of the elastomer.

[0112] from example base Force [N] 1(V) FKM I 12.4 2 FKM I with layer 2 2.3 5(V) EPDM I 10.9 6 EPDM with lay...

example 12

[0118] Example 12: Tribological properties with lubricants

[0119] In order to characterize the properties of the lubricated sealing system, comparative experiments were carried out on a disc test rig (for this see also M. Sommer, W. Haas: "A new approach on grease tribology in sealing technology: Influence of the thickener particles (sealing A New Approach to Grease Tribology in Technology: The Effect of Thickener Particles), Tribology International, Vol. 103, November 2016, pp. 574-583). For this, a test piece consisting of FKM I was used, and a comparative test was carried out uncoated and coated with layer 2 (according to examples 1 and 2). A polyalkylene glycol oil of ISO viscosity class 460 (Klübersynth UH1 6-460) was used as lubricant. Temper the test device to 60°C. image 3 Results are shown with coated FKM (circles) and uncoated FKM (squares). A significant friction reduction due to the coating was also clearly observed in the lubricated sealing system. The ef...

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Abstract

The subject of the present invention is the use of a sealing element for dynamically sealing a sealing body in the presence of a lubricant, wherein said sealing element has an elastomeric matrix and a plasma coating, wherein said coating contains the elements carbon, oxygen, Silicon, hydrogen and optionally fluorine, wherein said coating has the following properties at least on the surface: C:Si molar ratio (at% / at%)>5, O:Si molar ratio (at% / at% )>3, and surface energy <50mN / m. The invention also relates to a sealing system, a sealing method, a sealing element and a method of manufacture thereof.

Description

technical field [0001] The invention relates to the use of a sealing element for dynamic sealing of a sealing body in the presence of a lubricant, wherein the sealing element comprises an elastomeric matrix and a plasma coating. The invention also relates to a sealing system, a sealing method, a sealing element and a method of manufacture thereof. Background technique [0002] In the field of sealing technology, moving machine parts in assemblies are sealed by means of suitable sealing elements (sealing objects). In the case of dynamic sealing, a movement of the sealing body to be sealed relative to the sealing element takes place. Exemplary dynamic seals are slide ring seals, radial shaft seal rings, labyrinth shaft seals, rod seals, O-rings or piston rings. In a dynamic seal, the moving interface is called the seal gap. Sealing elements adjoin machine components such as shafts, pistons or rods. Dynamic seals may contain lubricants. The lubricant is used in assemblies ...

Claims

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Application Information

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IPC IPC(8): C08J7/12B05D1/00F16J15/10
CPCB05D1/62C08J7/123F16J15/3284B05D7/02C08J7/06
Inventor F·冯·弗拉格斯特因M·艾德勒S·鲁兹T·世内兹K·哈尔斯特因K·菲勒B·特拉伯E·普莱姆
Owner CARL FREUDENBERG KG
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