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Engineering Group Research Article Article ID: igmin152

Development of a Mechanical Seal Closed Design Model

Information Engineering SensorsArtificial Intelligence
Serhii Shevchenko *
Affiliation

Affiliation

    Pukhov Institute for Modelling in Energy Engineering, General Naumov Str. 15, 03164 Kyiv, Ukraine

DOI10.61927/igmin152 Fulltext HTML Fulltext PDF Cite this article
DOI10.61927/igmin152 Fulltext HTML Fulltext PDF Cite this article

Abstract

The operating experience of mechanical seals shows that as a result of angular deformations of the rings, the wear of the contact surfaces along the radius is uneven. When designing mechanical seals, it is necessary to calculate the amount of expected leakage through the seal, friction power consumption, as well as the possible durability of the unit. These calculated dependencies and estimates are obtained based on the constructed mechanical seal model. In the area of hydrodynamic load support in the case of a confusor joint or a converging film, the slope of the pressure diagram is such that a decrease in the film thickness increases the hydrodynamic support. This is referred to as enabling stable non-contact sealing operation. The execution of the rubbing surfaces of the interface of the end pair should ensure the formation of the calculated confusor shape of the sealing gap in all modes of operation and axisymmetric pressure fields during the rotation of the rotor.

Figures

Scheme of the end gap of the sealing unit after it enters the liquid friction mode with the determining influence of hydrostatic forces. Let’s introduce the following definitions: r, z, are radial, axial, and angular coordinates; ur, uz, uφ are the radial, axial, and angular velocities of the medium flow; ω is the angular velocity of rotation of the ring; p1,p2 - pressure before and after the seal; Fn is the force of the elastic spring element; h0 - the average gap between the sealing surfaces; la, lb are the body heights of ring A and ring B, respectively; θ - the angle of non-parallelism of the sealing surfaces of the rings; r1, r2 - inner and outer radii of the sealing surfaces of the rings. Figure 1: Scheme of the end gap of the sealing unit after it...
The location of the sealing surfaces of the mechanical seal rings and the diagram of the pressure of the sealed liquid: a - Confusor open joint, b - Diffuser open joint, c - Confusor joint with contact, d - Diffuser joint with contact. Figure 2: The location of the sealing surfaces of the mechan...
Scheme of the end gap of the sealing unit after it enters the liquid friction mode with the determining influence of hydrostatic forces. Let’s introduce the following definitions: r, z, are radial, axial, and angular coordinates; ur, uz, uφ are the radial, axial, and angular velocities of the medium flow; ω is the angular velocity of rotation of the ring; p1,p2 - pressure before and after the seal; Fn is the force of the elastic spring element; h0 - the average gap between the sealing surfaces; la, lb are the body heights of ring A and ring B, respectively; θ - the angle of non-parallelism of the sealing surfaces of the rings; r1, r2 - inner and outer radii of the sealing surfaces of the rings. Figure 1: Scheme of the end gap of the sealing unit after it...
The location of the sealing surfaces of the mechanical seal rings and the diagram of the pressure of the sealed liquid: a - Confusor open joint, b - Diffuser open joint, c - Confusor joint with contact, d - Diffuser joint with contact. Figure 2: The location of the sealing surfaces of the mechan...
Scheme of the end gap of the sealing unit after it enters the liquid friction mode with the determining influence of hydrostatic forces. Let’s introduce the following definitions: r, z, are radial, axial, and angular coordinates; ur, uz, uφ are the radial, axial, and angular velocities of the medium flow; ω is the angular velocity of rotation of the ring; p1,p2 - pressure before and after the seal; Fn is the force of the elastic spring element; h0 - the average gap between the sealing surfaces; la, lb are the body heights of ring A and ring B, respectively; θ - the angle of non-parallelism of the sealing surfaces of the rings; r1, r2 - inner and outer radii of the sealing surfaces of the rings. Figure 1: Scheme of the end gap of the sealing unit after it...
The location of the sealing surfaces of the mechanical seal rings and the diagram of the pressure of the sealed liquid: a - Confusor open joint, b - Diffuser open joint, c - Confusor joint with contact, d - Diffuser joint with contact. Figure 2: The location of the sealing surfaces of the mechan...

References

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