Browsing by Author "Hannss, Jacqueline"

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Open Access
Multiphase conjugate heat transfer analyses on the assembly situation of rotary shaft seals
(2023) Hannss, Jacqueline; Grün, Jeremias; Olbrich, Christoph; Feldmeth, Simon; Bauer, Frank
Rotary shaft seals prevent the exchange of fluid at shaft passages. Their function and service life depend decisively on the temperature in the contact area between the sealing edge and the shaft. Since the temperature depends on both the generation of frictional heat in the contact area and the heat transfer to the surrounding sealing system, the design of the sealing system is crucial. Within the scope of this work, multiphase conjugate heat-transfer analyses were performed considering different assembly situations. The computed results were presented and contrasted to experimental data. This resulted in a valid model for predicting the temperature in the sealing system, which provided insight into the influence of the sealing surroundings on the contact temperature.
Open Access
Studies on 3D printed rotary shaft seals
(2024) Gohs, Marco; Hannss, Jacqueline; Bauer, Frank
Rotary shaft seals are an established standard for sealing rotating shafts [1]. The geometry has been optimized over decades and adapted to the material properties to ensure an optimum sealing capability [2]. With the widespread availability of 3D printing technologies, there is a growing interest in printable seals for replacement parts or prototypes. This means that failed parts can be replaced as quickly as possible and the development process can be significantly accelerated. However, geometries established for conventional production cannot be implemented as 3D printed variants without accepting severe functional restrictions. A seal that can be successfully 3D printed must therefore be specially adapted. The following findings provide an overview of the latest research and development in the field of 3D-printed rotary shaft seals.
Open Access
Using multiphase conjugate heat transfer analyses to predict the contact temperature of rotary shaft seals
(2024) Hannss, Jacqueline; Grün, Jeremias; Olbrich, Christoph; Feldmeth, Simon; Bauer, Frank
Rotary shaft seals are used to seal shaft passages and prevent the exchange of fluids. The performance and service life of rotary shaft seals is strongly dependent on the temperature in the contact area between the sealing edge and the rotating shaft. Multiphase conjugate heat-transfer analyses covering different assembly scenarios, for example additional bearings or different shaft geometries, were performed in the software Ansys CFX 2021 R2. A model for predicting the maximum temperature in the sealing contact and for determining the heat dissipation from the sealing contact to the surrounding geometry was developed. This model provides the ability to predict the influence of the design of the surrounding sealing system on the contact temperature. Thus, the surrounding geometry of rotary shaft seals can be optimally designed to reduce the contact temperature between the sealing ring and the shaft as much as possible in order to achieve a longer service life.