Prediction method of leakage rate of contact mechanical seal

A technology of mechanical seals and predictive methods, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as changes, leakage, backlog of spare parts, etc.

Active Publication Date: 2012-04-11
NANJING FORESTRY UNIV
View PDF2 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the problems of frequent replacement or backlog of spare parts or massive leakage of mechanical seals used in long-period operating equipment in the field of process industry due to actu...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Prediction method of leakage rate of contact mechanical seal
  • Prediction method of leakage rate of contact mechanical seal
  • Prediction method of leakage rate of contact mechanical seal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0089] In order to further understand the content, characteristics and effects of the present invention, the following examples are cited hereby, and in conjunction with the attached Figure 14 The details are as follows:

[0090] From the perspective of the contact mechanical seal structure, predicting the leakage rate of the contact mechanical seal needs to know the leakage rate of the main seal (between the end faces of the dynamic and static rings) and the leakage rate of the secondary seal (the O-ring of the dynamic ring and the contact surface, the O-ring of the static ring and the contact surface). between surfaces) leakage rate.

[0091] Through the experiment, the wear amount of the main seal interface of the dynamic and static rings of the mechanical seal, the law of the fractal parameters of the surface morphology changing with time, and the law of the elastic modulus of the O-rings for the moving and static rings changing with time.

[0092] (1) Leakage rate of ma...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a prediction technology of a leakage rate of an existing contact mechanical seal. By utilizing a seal interface topography evolvement rule in the wear process of a movable ring and a stationary ring, and a contact compression stress variation rule of primary and secondary seal interfaces due to the wear-down of the movable ring and the stationary ring and the stress relaxation of an O-shaped ring, the topography parameters of the seal interfaces and loads on the movable ring and the stationary ring seal interfaces, the O-shaped ring and the internal diameter and external diameter contact interfaces of the O-shaped ring are determined after the mechanical seal runs for a certain time, and the characteristic sizes of percolation channels between the movable ring and the stationary ring seal interfaces and the O-shaped ring and the internal diameter and external diameter contact interfaces of the O-shaped ring are obtained by a percolation theory, a contact mechanics theory and a fractal theory at the moment, the effect of surface tension and centrifugal force of the sealed medium is considered, and then the leakage state of the existing contact mechanical seal is predicated by a Navier-Stokes equation. The method is simple and practical, the accident problems caused by frequent replacement or expiration of the mechanical seal can be effectively solved, and the safety and reliability of equipment are improved.

Description

technical field [0001] The invention belongs to the technical field of mechanical seal safety, and in particular relates to a technology for judging the leakage state of an in-service contact mechanical seal including a main seal of a dynamic and static ring end face and an O-ring secondary seal, and improving the safety and reliability of equipment. Background technique [0002] The invention of the mechanical seal provides a very effective means to solve the sealing problem of the power input shaft of the fluid machinery in the process industry. Due to its simple contact surface structure, convenient manufacture, stable sealing performance, no adjustment during operation, low power loss, no wear on the shaft or sleeve surface, strong vibration resistance, and high sealing parameters, mechanical seals are widely used in electric power, In the equipment of process industries such as shipbuilding, aerospace, petrochemical and so on. [0003] The connection status of the mech...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G06F19/00
Inventor 孙见君於秋萍陶丹萍涂桥安马晨波王衍李佳华洁
Owner NANJING FORESTRY UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap