Theory of binary spiral-grooved gas bearings

Emel’yanov, A. V.; Emel'Yanov, I. A.

doi:10.1007/bf02697748

Cited by 4 publications

(4 citation statements)

References 3 publications

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“…where Ω is the textured region. It is assumed that the gas film between the two mating rings is an isothermal flow, and the ideal gas state equation is expressed as: where R is the ideal gas constant, equal to 8.31 cm 3 MPa/ mol K, T is the absolute temperature of this sealing system and is taken as 300 K. M is the average molar mass of gas which is equal to 29 g/mol. Substituting Eq.…”

Section: Governing Equationsmentioning

confidence: 99%

“…However, internal leakage and adhesive wear may increase dramatically for mechanical seals operating under conditions of high fluid pressure, high speed and great centrifugal force [1]. Surface texture, fabricated on one or both of the sealing faces, has been proven to be an attractive means to improve the interfacial performance [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

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Comparative research on gas seal performance textured with microgrooves and microdimples

Shi

Zhang

Chen

et al. 2019

J Braz. Soc. Mech. Sci. Eng.

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The purpose of this paper is to compare the effects of different surface texture patterns on the performance of mechanical gas seals. Firstly, two types of surface texture, i.e., the patterns of microgrooves and microdimples, are constructed, and the steady-state Reynolds equation for compressible Newtonian fluid is employed and solved considering the collective effect of adjacent textures. Then, comparative analysis of different seal parameters such as the load-carrying force, gas film stiffness and gas leakage between microgrooves and microdimples is presented. Finally, two property-evaluating parameters are defined and different texture shapes and main parameters are compared. The results indicate that texture shapes with a straight edge perform better performance than those with a round edge. Furthermore, microgrooves 2 interpenetrating high-pressure side with texture depth of 3 µm may be the best choice in engineering practice, especially under small seal clearance and high rotation speed conditions.

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Section: Governing Equationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparative research on gas seal performance textured with microgrooves and microdimples

Shi

Zhang

Chen

et al. 2019

J Braz. Soc. Mech. Sci. Eng.

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show abstract

“…In the vast majority of cases, the rotor disc is smooth while the stator disc has a specific profile that determines the bearing characteristics, as for example load carrying capacity and friction coefficient. In this analysis, we consider a doubly profiled configuration shown in figure 1 that has been presented recently [1,5]. It has spiral shaped grooves in both bearing components and is therefore called a double sided spiral groove bearing (SGB) in contrast to the (one-sided) classical SGB [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…4 Results Figure 3 shows a typical pressure distribution in the double sided SGB. In [1,5] the special case of identical geometrical parameters in the stator and the rotor disc (α S = α R , κ S = κ R , γ S = γ R ) was analysed by an approximate analytical method. We applied the particle swarm optimization method for that configuration and calculated the optimal parameter sets for the classical and the double sided SGB with respect to load carrying capacity A.…”

Section: Introductionmentioning

confidence: 99%

Optimization of the double sided spiral groove thrust bearing: A comparison to approximate analytical solutions

Lehn¹,

Schweizer²

2015

Proc Appl Math and Mech

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Reliable high performance bearings are essential in rotordynamics. As speeds and loads are continuously increased the demands on bearing technology grow simultaneously. Optimization of bearing characteristics becomes more important under these circumstances. For hydrodynamic thrust bearings, recently a special design has been presented, which is supposed to enhance the load carrying capacity by 60% compared to the best known thrust bearing type. The bearing consists of two spiral grooved surfaces and is therefore called a double sided spiral groove bearing. Early calculations of the bearing performance base on approximate analytical methods.In order to verify those results, a detailed numerical model of the bearing is presented by the authors. With the help of a particle swarm optimization method, optimal bearing parameters are determined and a comparison is drawn to other thrust bearing designs. It is shown that previously published results overestimate the performance of the double sided spiral groove bearing severly.

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Generalized Reynolds equation for fluid film problems with arbitrary boundary conditions: application to double-sided spiral groove thrust bearings

Lehn

Schweizer

2015

Arch Appl Mech

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Theory of binary spiral-grooved gas bearings

Cited by 4 publications

References 3 publications

Comparative research on gas seal performance textured with microgrooves and microdimples

Comparative research on gas seal performance textured with microgrooves and microdimples

Optimization of the double sided spiral groove thrust bearing: A comparison to approximate analytical solutions

Generalized Reynolds equation for fluid film problems with arbitrary boundary conditions: application to double-sided spiral groove thrust bearings

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