Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Mechanical sealing structure of gas lubricating end face with human pyramid-like combined groove deep grooves

A technology of end face mechanical seal and sealing structure, which is applied in the direction of engine sealing, mechanical equipment, engine components, etc., can solve the problems of insufficient air film stiffness, high air film stiffness, and low leakage rate, etc., to reduce the eddy current effect and improve Effect of bearing capacity and air film stiffness, strong pumping action

Active Publication Date: 2015-09-16
ZHEJIANG UNIV OF TECH
View PDF15 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to overcome the problems of high leakage rate and insufficient gas film stiffness when the dry gas seal operates under high-speed and high-pressure conditions, and provides a fluid dynamic pressure on the end surface under high-speed and high-pressure conditions, which has high gas film stiffness and low leakage rate. Mechanical seal structure of deep gas end face with composite groove similar to stacked Arhat

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
  • Mechanical sealing structure of gas lubricating end face with human pyramid-like combined groove deep grooves
  • Mechanical sealing structure of gas lubricating end face with human pyramid-like combined groove deep grooves
  • Mechanical sealing structure of gas lubricating end face with human pyramid-like combined groove deep grooves

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] see figure 1 , figure 2 and image 3, a mechanical seal structure with gas lubricated end faces of deep grooves similar to stacked Arhat composite grooves, including a dynamic ring and a static ring of a mechanical seal. The other side of the end face of the ring is the low-pressure side, that is, the downstream side, which is characterized in that: the end face of at least one seal ring in the moving ring and the static ring is provided with a plurality of deep grooves that are evenly distributed along the circumferential direction, resembling composite grooves of arhats. The deep-groove like stacked Arhat compound groove is composed of basic dynamic pressure groove 4 and stacked Arhat-shaped groove 1, the basic dynamic pressure groove 4 is opened upstream of the end face, and the bottom surface of the basic dynamic pressure groove 4 is processed with a stacked Arhat-like groove. Groove 1, the upstream sub-grooves 11, 13 and 15 of the adjacent two rows of grooves in...

Embodiment 2

[0040] refer to Figure 5 and Figure 6 The difference between this embodiment and Embodiment 1 is that in the arhat-like groove, the sub-groove on the downstream side and the sub-groove on both sides of the sealing weir on the upstream side straddled by the base The fan-shaped sealing weirs with the same depth of dynamic pressure grooves are separated.

[0041] The sub-grooves 11, 13, 15 in the upstream row are separated from the sub-grooves 21, 23 in the adjacent downstream row by a sealing dam 42 that is equal in depth to the foundation dynamic pressure groove 4, and the sub-grooves 21, 23 in the middle row are separated from the adjacent sub-grooves. The downstream row sub-grooves 3 are separated by a sealing dam 41 whose depth is equal to that of the basic dynamic pressure groove 4, and the rest of the structure and implementation are the same as in the first embodiment.

Embodiment 3

[0043] refer to Figure 7 and Figure 8 , the difference between this embodiment and Embodiment 1 is that the sub-slots 21 and 23 of the middle row are respectively embedded between the adjacent upstream row of sub-slots 11 and 13 and 13 and 15, and the downstream row of sub-slots 3 It is embedded between the sub-slots 21 and 23 in the middle row, and the rest of the structure and implementation are the same as in the first embodiment.

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

A mechanical sealing structure of a gas lubricating end face with human pyramid-like combined groove deep grooves comprises a moving ring and a static ring which are in mechanical seal. The end face of at least one seal ring between the moving ring and the static ring is provided with a plurality of human pyramid-like combined groove deep grooves spirally evenly distributed in the circumferential direction, and the human pyramid-like combined groove deep grooves are gradually narrowed from the upstream part to the downstream part. The human pyramid-like combined groove deep grooves are composed of basic dynamic pressure grooves and human pyramid-like grooves. The bottom surfaces of the basic dynamic pressure grooves are provided with the human pyramid-like grooves, and the depths of the human pyramid-like grooves become shallow gradually from the upstream part to the downstream part. The human pyramid-like grooves are formed by splicing multiple rows of sub-grooves, the adjacent sub-grooves on the same row are separated through sealing weirs with the depths equal to that of the basic dynamic pressure grooves, the sub-grooves on one downstream side stride over the sealing weirs between two sub-grooves of adjacent rows on the upstream side and are communicated with the sub-grooves on the two sides of the sealing weirs on the upstream side, and a sealing dam is arranged on the downstream part of the end face.

Description

technical field [0001] The invention relates to a fluid dynamic pressure type gas lubrication end face mechanical seal structure of a rotary fluid machine, in particular to a composite groove deep end face seal structure containing a basic dynamic pressure groove and a superimposed Arhat-like groove, which is suitable for various compressors, Gas film end face seal at the shaft end of rotating machinery such as fans, pumps and reactors. Background technique [0002] Since the development of dry gas seals in the 1960s, they have been widely used in medium and high-speed rotating machinery such as centrifugal compressors and fans due to their unique performance advantages. The dry gas seal is to open a dynamic pressure groove with a spiral, straight line or arc line on the sealing end surface. When the dynamic ring rotates, the gas medium is pumped into the sealing end surface by using the strong dynamic and static pressure effect of the dynamic pressure groove. The gas enter...

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): F16J15/34F16J15/54
CPCF16J15/164F16J15/40F16J15/3412
Inventor 彭旭东江锦波孟祥铠白少先李纪云
Owner ZHEJIANG UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com