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Combined type sealing device with double end faces

A sealing device and combined technology, applied in the direction of engine sealing, engine components, mechanical equipment, etc., can solve the problems of loss of working ability of the seal, difficult to improve the service life, failure of the plane seal, etc., to achieve high working reliability, internal The effect of small temperature difference outside and stable sealing performance

Inactive Publication Date: 2011-05-25
江苏金鹰流体机械有限公司
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

Due to the wide end face of the flat seal, this kind of fluid is easy to form condensation between the sealing surfaces, so that the seal loses its working ability. A large amount of friction heat will be generated, which will cause the friction ring to be in a high-temperature friction state for a long time and cause thermal cracking, resulting in early failure of the plane seal, so it is difficult to improve the service life

Method used

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  • Combined type sealing device with double end faces
  • Combined type sealing device with double end faces

Examples

Experimental program
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Embodiment 1

[0021] Embodiment one: see attached figure 1 shown.

[0022] A double-face combined sealing device, installed in fluid conveying equipment, used to achieve shaft end sealing, including gland 1, shaft sleeve 2, driving ring 3, sealing ring 4, limit block 5, main seal 6, and auxiliary seal 7.

[0023] The main seal is in direct contact with the sealed fluid, and the secondary seal is in direct contact with the atmosphere.

[0024] The main seal 6 is a knife-edge seal, and the main seal 6 includes a pair of main friction rings 8 . The main friction ring 8 includes a driving ring 9 and a main static ring 10. The surface of any one main friction ring 8 that is in contact with another main friction ring 8 is its friction surface, and the friction surface is annular. The single friction surface of the driving ring 9 The side width is smaller than the unilateral width of the friction surface of the main static ring 10, and the unilateral width of the friction surface of th...

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Abstract

The invention relates to a combined type sealing device with double end faces, which is installed at fluid conveying equipment to realize the sealing of a shaft end. The combined type sealing device with the double end faces comprises a primary seal and a secondary seal, wherein the primary seal is in direct contact with fluid to be sealed, the secondary seal is in direct contact with the atmosphere, the primary seal comprises a pair of primary friction rings, and the secondary seal comprises a pair of secondary friction rings. Because the combined type sealing device with the double end faces, which is disclosed by the invention, adopts a double-seal structure, the operational reliability is high, and the combined type sealing device with the double end faces is suitable for sealing the shaft end of the conveying equipment of the fluid which has high viscosity and strong adhesiveness and is easy to polymerize.

Description

technical field [0001] The invention relates to a mechanical sealing device, in particular to a double-face combined sealing device. Background technique [0002] In the prior art, in the petroleum and petrochemical industry, for fluids with high viscosity, easy polymerization and strong adhesion, such as plastics, pulp, paint, rubber stock solution, etc., the shaft end seal form of the conveying equipment usually adopts ordinary mechanical seals. Sealing, that is, a flat sealing structure. In terms of service life, it is much lower than its seal life in ordinary low-viscosity stable fluids. Due to the wide end face of the flat seal, this kind of fluid is easy to form condensation between the sealing surfaces, so that the seal loses its working ability. A large amount of frictional heat will be generated, which will cause the friction ring to be in a high-temperature friction state for a long time and cause thermal cracking, resulting in early failure of the plane seal, so...

Claims

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Application Information

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IPC IPC(8): F16J15/16F16J15/52F16J15/46
Inventor 瞿国平房硕君
Owner 江苏金鹰流体机械有限公司
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