Liquid film lubrication zero-leakage mechanical seal with double rows of grooves

Abstract

The invention provides a liquid film lubrication zero-leakage mechanical seal with double rows of grooves, relates to the technical field of friction and lubrication of mechanical seals, and solves the technical problems that general groove shapes cannot achieve complete sealing and zero leakage. The liquid film lubrication zero-leakage mechanical seal with the double rows of grooves comprises a sealing ring (1), L-shaped grooves (2) and spiral grooves (3). The liquid film lubrication zero-leakage mechanical seal with the double rows of grooves can be used in the situation that the mechanicalseal of a fluid machine is required to realize the zero escape of a sealed medium. The liquid film lubrication zero-leakage mechanical seal with the double rows of grooves realizes the zero escape ofthe sealed medium, and has strong durability and low maintenance cost.

Description

technical field [0001] The invention relates to the technical field of friction and lubrication of mechanical seals, in particular to a liquid film lubricated zero-leakage mechanical seal with double rows of grooves. Background technique [0002] With the development of petroleum and petrochemical industries in the direction of no pollution, long cycle, low energy consumption and high efficiency, the mechanical seals of fluid machinery need to meet the requirements of zero leakage, long life and low operation and maintenance costs. Ordinary spiral grooves or T-shaped grooves have a high dynamic pressure effect, so that too much liquid is pumped into the end face of the seal ring, causing seal leakage, while the original figure-of-eight spiral grooves will be damaged due to the outer groove under the pressure of the seal liquid. The hydrodynamic pressure effect is relatively strong, causing the inner spiral groove to fail to seal the liquid and eventually leak. [0003] In t...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a liquid film lubricated zero-leakage mechanical seal with double rows of grooves, by setting L-shaped grooves distributed along the outer diameter of the seal ring and spiral grooves distributed along the inner diameter of the seal ring on the end surface of the seal ring. The liquid pumps the sealing liquid to the sealing end face through the outer L-shaped groove, and pumps the sealing liquid back to the outer diameter through the inner spiral groove to seal the sealing liquid. Through the cooperation of the inner and outer double grooves, a dynamic pressure effect is generated in the end face groove. Form a stable liquid film to achieve the purpose of non-contact operation of the liquid film lubricated mechanical seal, and finally achieve zero leakage, which solves the technical problem that the existing groove shape cannot achieve complete sealing and zero leakage

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