Spiral Groove Face Seal Behavior and Performance in Liquid Lubricated Applications

2018 ◽  
Vol 61 (6) ◽  
pp. 1048-1056 ◽  
Author(s):  
Mathieu Rouillon ◽  
Noël Brunetière
Keyword(s):  
Face Seal ◽  
Spiral Groove ◽  
And Performance

Behavior of Hydrostatic and Hydrodynamic Noncontacting Face Seals

1968 ◽  
Vol 90 (2) ◽  
pp. 510-519 ◽  
Author(s):  
H. S. Cheng ◽  
C. Y. Chow ◽  
D. F. Wilcock
Keyword(s):  
Large Diameter ◽  
Initial Imperfection ◽  
Static Stability ◽  
Compressible Fluids ◽  
Face Seal ◽  
Spiral Groove ◽  
Design Data ◽  
Dynamic Tracking ◽  
Face Seals ◽  
Groove Seal

In this paper, the pressure generation and static stability of face-type seals are discussed and an expression is developed to estimate the effectiveness of hydrodynamic action in these seals. Some design data are presented for the hydrostatic step seal, hydrostatic-orifice compensated seal, hybrid spiral-groove seal, and the shrouded Rayleigh step seal. These data are applicable to large-diameter seals for compressible fluids. The seal ring distortions due to initial imperfection, pressure, and thermal expansion are discussed. Approaches to estimate and to minimize the effects of these distortions are outlined. Finally, the ability of a face seal to track the vibrations of the runner is also discussed and methods required to determine the dynamic tracking for rigid or flexible seals are described.

Effect of Surface Roughness on Performance of Spiral Groove Gas Film Face Seal

2012 ◽  
Vol 184-185 ◽  
pp. 180-183 ◽  
Author(s):  
Gang Ma ◽  
Wei Zhao ◽  
Xin Min Shen
Keyword(s):  
Surface Roughness ◽  
Three Dimensional ◽  
Great Influence ◽  
Face Seal ◽  
Dimensional Model ◽  
Spiral Groove ◽  
Three Dimensional Model ◽  
Three Dimensional Flow ◽  
Gas Face Seal ◽  
Effect Of Surface

The three dimensional model was established for studying performance of spiral groove gas face seal. According to machining features of different surface area, the seal face can be divided into three parts, rotor ring grooved area, rotor ring non-grooved area and static ring area. The effect of roughness on seal performance was analyzed based on calculation of three dimensional flow field. The analysis results show that the surface roughness of rotor ring grooved area has great influence on the seal performance, but the influence is little when roughness on non-grooved rotor ring surface and static ring surface. The influence must be considered when surface roughness of rotor ring grooved area bigger than 0.2μm. Roughness of rotor ring surface can increase the loading force while it also can cause the increase of leakage. It is important to select rational roughness when designing gas face seal.

Design and Performance of Compliant Thrust Bearings With Spiral-Groove Membranes on Resilient Supports

1981 ◽  
Vol 103 (3) ◽  
pp. 373-384 ◽  
Author(s):  
L. Licht ◽  
W. J. Anderson ◽  
S. W. Doroff
Keyword(s):  
Load Capacity ◽  
Journal Bearings ◽  
Spiral Groove ◽  
Thrust Bearings ◽  
Flexible Membranes ◽  
And Performance

Novel thrust bearings, with spiral-groove, flexible membranes mounted on resilient supports, were designed and their performance convincingly demonstrated. Advantages of surface compliance were thus combined with the superior load-capacity of the spiral-groove geometry. Loads of 127–150N (29–33 lb) were comfortably supported on an area 42 cm2 (6.5 in.2), at speeds 43,000–45,000 rpm and mean clearances 15–20 μm (600–800 μin.), by these self-acting and air-lubricated bearings. Support-worthiness was proved under exacting conditions, when tested in conjunction with foil journal-bearings and a 19N (4.3 lb)-rotor, excited in a pitching mode by a total unbalance of 43 μm.N (6100 μin.oz).

Analytical Investigation of the Spiral Groove Face Seal

1973 ◽  
Vol 95 (4) ◽  
pp. 499-510 ◽  
Author(s):  
H. J. Sneck ◽  
J. F. McGovern
Keyword(s):  
Mathematical Model ◽  
Parametric Design ◽  
Analytical Investigation ◽  
Performance Characteristics ◽  
Comprehensive Model ◽  
Inertial Effects ◽  
Face Seal ◽  
Spiral Groove ◽  
Design Studies

An analytical investigation of both a simplified and a comprehensive mathematical model of a spiral groove face seal, using the “narrow seal” approximation. The sealing fluid is assumed to be incompressible and Newtonian. The inertial effects associated with seal curvature are incorporated in the comprehensive model. The results of the analysis are programmed for computer computation in order to facilitate their application in parametric design studies. Performance characteristics are calculated for some particular seal designs.

Thermohydrodynamic Analysis of Spiral Groove Mechanical Face Seal for Liquid Applications

2012 ◽  
Vol 134 (2) ◽  
Author(s):  
Yifan Qiu ◽  
M. M. Khonsari
Keyword(s):  
Temperature Distribution ◽  
Thermal Behavior ◽  
Parametric Study ◽  
Three Dimensional ◽  
Mechanical Seal ◽  
Face Seal ◽  
Cfd Model ◽  
Spiral Groove ◽  
Mechanical Face Seal ◽  
Overall Performance

In this study, a three-dimensional thermohydrodynamic (THD) CFD model is developed to study the characteristics of an inward pumping spiral groove mechanical seal pair using a commercial CFD software CFD-ACE + . The model is capable of predicting the temperature distribution and pressure distribution of the seal pair. Based on the CFD model, a parametric study is conducted to evaluate the performance of the seal. It is found that thermal behavior plays an important role in the overall performance of a seal. The spiral groove parameter can be optimized to achieve desired performance. The optimization is dependent on the application requirement of the seal.

scholarly journals DESIGN AND PERFORMANCE TEST OF DIRECT SEED METERING DEVICE FOR RICE HILL

2021 ◽  
pp. 257-268
Author(s):  
Tian Liquan ◽  
Xiong Yongsen ◽  
Ding Zhao ◽  
Su Zhan
Keyword(s):  
Rice Field ◽  
Performance Test ◽  
Helix Angle ◽  
Direct Seeding ◽  
Movement Trajectory ◽  
Test Results ◽  
Spiral Groove ◽  
Seeding Rate ◽  
And Performance ◽  
Seed Metering Device

In order to meet the requirements of rice field precision direct seeding in rows and hills, a spiral grooved seed metering device for rice field precision direct seeding in hills is designed. The Matlab software is used to study the movement trajectory of rice buds in the spiral groove during the seeding process. Based on the quadratic regression-orthogonal rotation combination design, and taking the working speed of the seeding wheel, the spiral groove length and the helix angle of the spiral groove as the test factors, as well as the qualified rate of hill diameters, the qualified rate of hill grains and the miss-seeding rate as the indicators, the seed metering performance is tested by JPS-12 metering device test bench. The test data are analyzed by using Design-Expert 6.0.10 software to obtain a mathematical model between the factors and indicators. The test results show that when the spiral groove rise angle is 71.0°, the spiral groove length is 10.8mm, and the working speed of the metering wheel is 23.2r/min, the qualified rate of hill diameter, qualified rate of hill grains and miss-seeding rate are 91.06%, 94.64% and 3.64% respectively. The seeding performance meets the agronomic requirements of rice field seeding.

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