Gas lubrication end face mechanical seal structure for pyramid-shaped deep composite groove

A compound groove and arhat technology, which is applied to the sealing of the engine, mechanical equipment, engine components, etc., can solve the problems of insufficient air film stiffness, high air film stiffness, and high leakage rate, so as to weaken the eddy current effect and improve the bearing capacity and gas pressure. Effect of Membrane Stiffness, Strong Pumping Action

Active Publication Date: 2019-01-18
ZHEJIANG UNIV OF TECH
View PDF9 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 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 compound groove like 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
  • Gas lubrication end face mechanical seal structure for pyramid-shaped deep composite groove
  • Gas lubrication end face mechanical seal structure for pyramid-shaped deep composite groove
  • Gas lubrication end face mechanical seal structure for pyramid-shaped deep composite groove

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 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

[0041] 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.

[0042] 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

[0044] 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

The invention provides a gas lubrication end face mechanical seal structure for pyramid-shaped deep composite grooves. The structure includes a moving ring and a static ring, in the moving ring and the static ring, the end face of at least one sealing ring is provided with the pyramid-shaped deep composite grooves spirally and evenly distributed in the circumference direction, and the grooves gradually become narrows from upstream to downstream; the pyramid-shaped deep composite grooves are composed of base dynamic pressure grooves and pyramid-shaped grooves, the bottom surfaces of the base dynamic pressure grooves are provided with the pyramid-shaped grooves, and the depth of the pyramid-shaped grooves gradually become narrows from upstream to downstream; the pyramid-shaped grooves are formed through splicing of several rows of secondary grooves, and the adjacent secondary grooves of the same row are separated by a sealing weir whose depth is same as that of each base dynamic pressuregroove; the secondary grooves on one side of the downstream are astride on the sealing weir between the two secondary grooves of the adjacent row on one side of the upstream and connected with the secondary grooves on the two sides of the sealing weir on one side of the upstream. The downstream of the end face is provided with a sealing dam.

Description

[0001] This application is a divisional application of the invention patent application with the application number 201510329342.2, the application date is June 15, 2015, and the invention title is "a deep groove gas lubricated end face mechanical seal structure with composite grooves resembling a stacked Arhat". technical field [0002] 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 [0003] 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 advan...

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
Patent Type & Authority Applications(China)
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 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