Ferrofluid seals. Ferrofluids are a unique class of material.
Ferrofluid seals Smooth Operation. Ferrofluid centrifugal seal means that when the rotating shaft speed is low, the ferrofluid is concentrated in the gap, and the magnetic field force is balanced with the applied pressure For Loudspeakers, Seals, Experiments and Educators. Low vapor pressure ferrofluids maintain seal integrity even in high vacuums better than 10-9 mbar. Oct 1, 2020 · Degradation of the ferrofluid in the seal ring over time decreases its sealing capacity, which results in seal failure when the sealing capacity becomes lower than the operational sealing pressure. Vacuum Rotary Feedthroughs. In these cases, approximating the magnetic permeability of the ferrofluid as that of a vacuum for Dec 1, 2023 · Ferrofluid (FF) is a new type of functional material, its main components are ferromagnetic particles in the solid phase and the basic carrier liquid in the liquid phase, so it has the liquid fluidity at the same time also reflects the magnetic material. Lemarquand and others published Ferrofluid Seals | Find, read and cite all the research you need on ResearchGate Dec 1, 2024 · Li et al. Distribution of the magnetic field in the seal gap (SG) is analyzed by using the magnetic field finite element method, and the theoretical pressure resistance (PR) is calculated by using the step ferrofluid May 19, 2020 · As a new type of intelligent material, ferrofluid seal has been widely used in modern industry [1]-[4]. Select a Ferrofluidic Vacuum Rotary Feedthrough Matching Your Requirements. proposed a new type of structure for large gap ferrofluid seal, and analysed the influence of radial parameters on the sealing pressure resistance [5]. Nov 1, 2021 · Ferrofluid seal and mechanical seal when combined (known as tandem seals) together offer several advantages over usual multiple mechanical seal arrangements. They provide a hermetic seal capable of sustaining chamber pressures below 1 x 10 -8 torr. Non-contaminating - With intrinsically low vapor pressure, ferrofluids hold seal integrity even in vacuums in the 10-9 mbar range; absence of mechanical friction means no risk of particulate invasion harmful to the system. Ferrofluid seals can also be used in sealing static joints like covers of vacuum chambers, flanges, etc. About Ferrotec Founded on a technology core of Ferrofluid magnetic liquid and Ferrofluidic ® sealing products, our company and our product portfolio have grown As the industry leader in Ferrofluidic ® seals and vacuum rotary feedthroughs, China Advanced Ceramic is widely recognized for quality and performance of the ferrofluid that we use in our seals. About Ferrotec. High-Speed Capability For Loudspeakers, Seals, Experiments and Educators . Ferrofluid - FerroLabs, Inc. Ferrotec ferrofluids are uniquely optimized to maximize performance in specific applications. Magnetic fluid seals have been available since the early 1970s. May 1, 2024 · Ferrofluid (FF) represents a novel category of intelligent materials. [25] had explicitly pointed out that in scenarios with weaker magnetic fields, such as in ferrofluid seals with larger sealing gaps or weaker magnetic sources, the magnetic permeability of the ferrofluid can actually exceed that of air. Ferrofluidic seals, also known as magnetic liquid rotary seals, are employed in various rotating equipment to facilitate rotary motion while ensuring a hermetic seal. 13 3. Figure 13 shows a ferrofluid seal with two permanent magnets for a flange joint. Ferrotec's Ferrofluidic vacuum rotary feedthroughs are the ultimate rotary sealing solution for vacuum environments. It is a colloidal system in which magnetic nanoparticles can exist stably in a baseload liquid under the encapsulation of surfactants [1]. This makes it simultaneously magnetic and mobile [2], [3]. A Ferrofluidic ® seal takes advantage of the response of a magnetic fluid to an applied magnetic field. Ferrofluid Seals, Fig. It is emphasized here that our structures are completely ironless and thus, there are no iron-base piston for these structures. The major application is as a rotary seal in vacuum applications and other specialist high integrity gas sealing. Ferrotec is the world’s leading provider of vacuum rotary feedthroughs. seals provide leak-free performance, even in intermittent and static conditions. The vacuum seals which use ferrofluid to enable transmission of rotational movement into the vacuum atmosphere are used in the manufacturing process of semiconductors, flat panel displays (FPD), LED, and solar cells. Features: Use a special magnetic fluid (ferrofluid) in place of an o-ring seal around dynamic parts May 16, 2022 · The methods generally used are filling the magnetic poles with non-magnetic materials, using a magnetic pole rotation structure, and centrifugal seal. Ferrofluidic ® seal manufacturing processes are specifically optimized for the manufacture of magnetic liquid rotary seals, leveraging over 40 years of technology-specific experience. 진공챔버 내에서 회전 운동이 필요한 경우에 사용하는 비접촉 Seal입니다. 모터를 챔버 내부에 설치를 할수도 있겠지만 Apr 26, 2011 · PDF | On Apr 26, 2011, V. Operation therefore is extremely smooth. Since there is no mechanical friction within the ferrofluid or between the ferrofluid and the static seal components or shaft, no particles are produced which could contaminate the system. Ferrofluidic Seal Repairs, Upgrades, and Exchange Services. Leak-free performance - Fluid will not leak from a ferrofluid seal; fluid loss is only from evaporation at high temperatures. Founded on a technology core of Ferrofluid magnetic liquid and Ferrofluidic ® sealing products, our company and our product portfolio have grown to meet the evolving needs of our customers. Such a dual ferrofluid + mechanical seal was proposed by Potencz et al. . We offer a broad range of vacuum rotary feedthroughs and Ferrofluidic® seals ranging from standard sizes and configurations to custom seals that have been designed specifically to meet demanding application requirements. A small amount of ferrofluid, placed in the gap between the magnet and the shaft, will be held in place by its attraction to the magnet. 3 As the industry leader in Ferrofluidic ® seals and vacuum rotary feedthroughs, Ferrotec is widely recognized for quality and performance of the ferrofluid that we use in our seals. We can supply customers with customized feedthroughs using hydrocarbon, ester and fluorocarbon-based fluids. Unlike elastomeric seals, they are not subject to plasticizing and relaxation effects during idle periods. Standard and custom parts available. [ 36 ] for agitators of chemical reactors. If the ferrofluid seals in the system are completely replaced at a sufficient rate, service life of the seal theoretically will be unlimited. A magnetic, or ferrofluid, seal takes advantage of the response of a magnetic fluid to an applied magnetic field. Within each product series, you’ll find that each product family offers a number of different ferrofluids with a variety of material properties and performance characteristics. Ferrotec can repair, upgrade or exchange your existing seal with a premium Ferrofluidic product using Ferrotec’s ferrofluid that is optimized for Ferrofluidic seals. The basic seal components include ferrofluid, a permanent magnet, two pole pieces and a magnetically permeable shaft. At present, the literature mostly concentrated on numerical analysis with few pole pieces ferrofluid seals and focused on the critical pressure value in one-stage magnetic fluid seal, lacking of numerical simulation and Mar 16, 2011 · 자석유체씰 (Magnetic Fluid Seal, Ferrofluid Seal) 회전운동을 진공 분위기로 전달하는 진공용 씰입니다. Our ferrofluid is unique, being the only one of its kind made in Korea and recognized as the best in the world for high vacuum semiconductor equipment. The rotating shaft is surrounded by magnets. Ferrotec's Ferrofluidic® vacuum rotary feedthroughs are the ultimate rotary sealing solution for vacuum environments. For the improvement of pressure resistance in ferrofluid seal with a small gap, a structure of divergent ferrofluid seal (FS) with alternating pole teeth (PT) was proposed in this paper. Ferrofluid seal (FFS) effectively harnesses the attributes of FF. The low viscous drag of the ferrofluid is independent of the pressure applied across the seal. With over thirty years of experience producing seals for the world’s most demanding applications, we have been able to optimize our ferrofluid Magron, established in August 2004, specializes in creating ferrofluids, piezo inks, and more. The FFS Ferrofluids are used to form liquid seals around the spinning drive shafts in hard disks. This is achieved through a physical barrier constituted by a ferrofluid, which is held in position by a permanent magnet. Aug 24, 2017 · With the development of science technology, ferrofluid seal has been intensively applied in mechanical industry, but more and more larger sealing stages are needed. Ferrofluids are a unique class of material. At present much more studies of ferrofluid seals with parameter of radial. A ferrofluid is a stable colloidal suspension of sub-domain magnetic nano particles in a liquid carrier. The world leader in ferrofluid technology, Ferrotec ferrofluid products are used in many areas of ferrofluid technology, from audio speakers to domain detection, material separation, biomedical research and more. Fan C et al. 7 Magnetic Fluid Seals. Aug 10, 2009 · Furthermore, the accurate knowledge of the ferrofluid seal shape as well as the magnetic pressure inside the ferrofluid seal is very useful for the design of devices using both permanent magnets and ferrofluid seals. is a developer and manufacturer of Ferro Fluid, Magnetic Liquid, Magnetic Fluid, Ferroliquid and Ferrofluid seals of wide application. Ferrofluid seal (FFS) is one of the most successful applications of FF [1], [2]. pibhr ldje qch ixcbzl suytcfu zgf ptxbf rpgh bvgal zuexf