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Mechanical seal arrangement having sliding surfaces of differing hardness

A technology of mechanical seals and sliding surfaces, applied in mechanical equipment, engine seals, engine components, etc., can solve the problem of high cost

Active Publication Date: 2015-11-18
EAGLEBURGMANN GERMANY GMBH &CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, particularly costly problems arise when diamond-coated sliding surfaces are used in slip rings

Method used

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  • Mechanical seal arrangement having sliding surfaces of differing hardness
  • Mechanical seal arrangement having sliding surfaces of differing hardness
  • Mechanical seal arrangement having sliding surfaces of differing hardness

Examples

Experimental program
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Effect test

Embodiment Construction

[0024] Refer to the following Figure 1 to Figure 3 A mechanical seal device 1 according to a preferred exemplary embodiment of the present invention is explained in detail.

[0025] figure 1 A mechanical seal device 1 for a power station feed pump is schematically shown, and the mechanical seal device 1 includes a rotating slip ring 2 and a stationary slip ring 3 . A sealing gap 4 is formed between the two slide rings 2 , 3 in a known manner. The rotary slip ring 2 is connected to a shaft bushing 8 via a rotary support ring 7 . The first pin 10 and the second pin 11 are provided for rotation and for torque transmission. The shaft bush 8 is disposed on the rotary shaft 5 .

[0026] The fixed slip ring 3 has a joint 9 fixed to the housing 6 via a fixed support ring 12 .

[0027] The mechanical seal 1 thus seals off the medium 13 to be conveyed by the power station supply pump from the environment 14 . The medium 13 in this exemplary embodiment is pure water. The low cond...

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Abstract

The invention relates to a mechanical seal arrangement comprising: a rotating slide ring (2) with a first sliding surface, and a stationary slide ring (3) with a second sliding surface, which delimit a sealing gap (4) between one another, the first and second sealing surfaces having differing hardness. The harder sealing surface (20) has a diamond coating and the softer sealing surface consists of carbon composite material and a mean initial roughness Ra1 (of the diamond coating (20)) is smaller than the mean initial roughness of the sliding surface made of carbon composite material.

Description

technical field [0001] The invention relates to a mechanical seal device with slip rings having different hardness and different initial roughness. Background technique [0002] Various forms of mechanical sealing devices are known in the prior art. For example, mechanical sealing slide rings provided with a diamond coating are known (cf. DE 20 2007 016 868 U1). Furthermore, US 2010 / 0061676 A1 discloses a mechanical seal with a DLC coating using pure water as a sliding lubricant. In the field of mechanical sealing devices, identical slip rings made of the same material (i.e. sliding surfaces with the same hardness) are frequently used, since it is conceivable that during the use of sliding surfaces with large differences in hardness, the A high degree of wear occurs on softer slip rings. For this reason, mechanical seal devices have previously been designed so that the slides in pairs have the same hardness. [0003] However, the problem of high cost arises particularly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/34
CPCF16J15/3496F04D29/126F04D29/026F16J15/162
Inventor J·奥茨切克A·克雷奇默C·斯科尔茨R·席克坦茨安德里亚斯·斯科鲁弗尔
Owner EAGLEBURGMANN GERMANY GMBH &CO KG
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