Mechanical seal ring with maple-leaf-like grooves

A technology of mechanical seals and seal rings, which is applied in the direction of engine seals, mechanical equipment, engine components, etc., can solve the problems of non-bidirectional rotation of the spiral groove, poor dynamic pressure effect, and unsatisfactory sealing performance, so as to achieve stable operation and good conduction. Flow effect, small leakage effect

Active Publication Date: 2016-10-12
云南流体规划研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most widely used groove type in non-contact mechanical seals is the spiral groove. The spiral groove has good air film stiffness and strong bearing capacity, but due to the non-structural symmetry of the groove type, the spiral groove cannot rotate in both directions.
Under some working conditions, it is required that the seal ring can rotate in both directions, but the current bidirectionally rotatable seal ring has problems such as poor dynamic pressure effect and unsatisfactory sealing performance under low-speed and low-pressure conditions. How to solve these problems has become a new research topic today. groove hot spot

Method used

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  • Mechanical seal ring with maple-leaf-like grooves
  • Mechanical seal ring with maple-leaf-like grooves
  • Mechanical seal ring with maple-leaf-like grooves

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as figure 1 , figure 2 with image 3 As shown, a mechanical seal ring with imitation maple leaf-shaped grooves has six imitation maple leaf-shaped grooves evenly distributed in the circumferential direction of the end face of the seal ring 1, and the imitation maple leaf-shaped grooves are composed of one radial linear groove and five arc grooves (arc groove Ⅰ2-arc groove Ⅴ7), arc groove Ⅰ2-arc groove Ⅳ6 are symmetrically distributed on both sides of the radial linear groove 4, the arc groove Ⅰ2 is the same as the arc groove Ⅳ6, and the arc groove Ⅱ3 is the same as the arc groove The line groove III5 is the same, the arc groove V7 is connected with the radial linear groove 4 close to the inner diameter end of the sealing ring 1, the high pressure side is at the outer diameter of the sealing ring 1, and the radial linear groove 4 opens at the edge of the outer diameter of the sealing ring 1. The maple leaf-shaped groove is radially symmetrical to the central axis...

Embodiment 2

[0034] Referring to the structure of Embodiment 1, the arc grooves are replaced with rectangular grooves.

[0035] A mechanical seal ring with imitation maple leaf-shaped grooves, two imitation maple leaf-shaped grooves are evenly distributed in the circumferential direction of the end face of the seal ring, and the imitation maple leaf-shaped grooves are composed of one radial linear groove and five rectangular grooves (rectangular groove Ⅰ- Rectangular groove V), rectangular groove I-rectangular groove IV are symmetrically distributed on both sides of the radial linear groove, rectangular groove I is the same as rectangular groove IV, rectangular groove II is the same as rectangular groove III, and rectangular groove V is close to the radial linear groove The inner diameter end of the sealing ring is connected, the high-pressure side is on the outer diameter of the sealing ring, and the radial linear groove opens on the edge of the outer diameter of the sealing ring. The edg...

Embodiment 3

[0040] Referring to the structure of embodiment 1, the arc groove is replaced with a spiral groove.

[0041]A mechanical seal ring with maple-leaf-like grooves, 50 maple-leaf-like grooves are evenly distributed in the circumferential direction of the end face of the seal ring, and the maple-leaf-like grooves are composed of one radial linear groove and five spiral grooves (spiral groove I- spiral groove V), spiral groove I-spiral groove IV are symmetrically distributed on both sides of the radial linear groove, spiral groove I is the same as spiral groove IV, spiral groove II is the same as spiral groove III, and spiral groove V is close to the radial linear groove The inner diameter end of the sealing ring is connected, the high-pressure side is on the outer diameter of the sealing ring, and the radial linear groove opens on the edge of the outer diameter of the sealing ring. The line shape of the imitation maple leaf-shaped groove edge is a spiral line.

[0042] The circumf...

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Abstract

The invention relates to a mechanical seal ring with maple-leaf-like grooves. 2-50 maple-leaf-like grooves are circumferentially and evenly distributed in one end surface of the seal ring and are 1-100 mu m deep; each maple-leaf-like groove comprises a radial linear groove and five grooves, four of the five grooves are symmetrically distributed on two sides of the radial linear groove, another groove is connected with one end, close to the inner diameter of the seal ring, of the radial linear groove, and the radial linear groove is opened in the edge of the outer diameter of the seal ring; and the maple-leaf-like grooves are symmetric about the radial central axis. The seal ring is applicable to one-way rotation and two-way rotation machinery, is used for liquid sealing or dry gas sealing, can effectively reduce abrasions of seal end surfaces, has the relatively good flow guiding effect, the better opening force and the smaller leakage amount, has the better sealing effect and dynamic pressure performance, runs more stably and is wider in application range, and the cost is saved.

Description

technical field [0001] The invention relates to a mechanical seal ring with a groove of a special shape, in particular to a mechanical seal ring with a groove imitating a maple leaf, which can be used for the sealing of rotating machines such as compressors, expanders, and pumps, and belongs to the technical field of fluid mechanical shaft seals . Background technique [0002] At present, non-contact mechanical seals have become the preferred shaft end seals for rotary fluid machinery due to their excellent performances such as non-contact, low wear, low energy consumption, and good stability. Various fluid dynamic pressure grooves are opened on the sealing ring, and a stable liquid film or gas film can be formed on the end face of the sealing ring. have a decisive role. The most widely used groove type in non-contact mechanical seals is the spiral groove. The spiral groove has good air film stiffness and strong bearing capacity, but due to the non-structural symmetry of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/16F16J15/42
CPCF16J15/164F16J15/42
Inventor 宋鹏云邹伟
Owner 云南流体规划研究院有限公司
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