German tos rakovnik seals, tos rakovnik models, tos rakovnik prices

tos rakovnik seals are devices that prevent fluid leakage, consisting of at least one pair of end faces perpendicular to the axis of rotation. These faces remain in contact and slide relative to each other under the action of fluid pressure and the elastic force (or magnetic force) of a compensation mechanism, along with auxiliary seals. Mechanical seals where the elastic loading mechanism and auxiliary seal are metal bellows are referred to as metal bellows seals. In light-duty seals, rubber bellows are sometimes used as auxiliary seals; however, since the elastic force of rubber bellows is limited, springs are generally required to supplement the loading force. Mechanical seals are commonly abbreviated as "mechanical seals".

tos rakovnik seal operating principle

A mechanical seal is a shaft sealing device that achieves leak prevention by maintaining contact between one or more pairs of end faces sliding relative to each other perpendicular to the shaft, under the action of fluid pressure and the elastic force (or magnetic force) of a compensation mechanism, supplemented by auxiliary seals. A typical mechanical seal structure consists of a stationary ring (static ring), a rotating ring (dynamic ring), an elastic element spring seat, set screws, a rotating ring auxiliary O-ring, and a stationary ring auxiliary O-ring. An anti-rotation pin is fixed to the gland to prevent the stationary ring from rotating. The rotating ring and stationary ring may also be referred to as compensating rings or non-compensating rings, depending on whether they possess axial compensation capability.

tos rakovnik seal system composition

1) Seal chamber: In the past, seal chambers housing mechanical seals were designed as stuffing boxes for soft packing seals. They are unsuitable for mechanical seals, not only due to their small size and narrow clearances, but also because the simple cylindrical shape is inappropriate. International standards for enlarged mechanical seal chambers have been established. Furthermore, companies such as Durametallic in the US and the Fluid Engineering Study Group in the UK are researching rational mechanical seal chamber designs. These designs should facilitate fluid flow and heat dissipation, while also aiding in the removal of solid particles to create a favorable environment for the seal. 2) Volatile organic compound (VOC) emission control system: Previously, attention was focused only on eliminating visible fluid leaks, neglecting the control of invisible volatile emissions. This has led to environmental pollution and posed risks to equipment and personnel. Organizations such as the Sealing Technology Committee of the Society of Tribologists and Lubrication Engineers (STLE) in the US have developed guidelines for controlling volatile emissions in rotating machinery, compressors, and screw systems equipped with mechanical seals, including SP-30 (1994), SP-32 (1990), and SP-33 (1991). SP-30 is implemented in three phases. It clearly defines barrier fluids and buffer fluids, clarifying misconceptions. A barrier fluid is introduced between dual seals to completely block process fluid from leaking into the surrounding environment. The pressure of the barrier fluid is always higher than that of the sealed process fluid. A buffer fluid serves as a lubricant or cushion between dual seals, and its pressure is always lower than that of the sealed process fluid. 3) Auxiliary system integration: Mechanical seal auxiliary systems require integration of cooling, heating, and flushing systems. Pump circulation needs optimization, and condition monitoring systems are being studied and resolved. Auxiliary system integration is specified in the API-682 standard. 4) Gas barrier seal system: Traditionally, liquid barriers were used to seal liquids or gases in barrier seal systems. To simplify bulky liquid barrier systems, gas barriers are now used to seal liquids or gases. Gas barrier seal systems may employ spiral groove gas seals with barrier gas, floating bushings with barrier gas, etc., to seal both gases and liquids.

tos rakovnik seal troubleshooting

1) Main factors causing oil seal leakage: Poor sealing of the oil seal is the primary factor causing leakage. When the shaft wears and forms grooves, even replacing it with a new oil seal fails to achieve sealing because the contact pressure between the oil seal lip and the shaft decreases, resulting in an insufficient interference fit between the oil seal lip diameter and the shaft diameter after installation. Taking the crankshaft oil seal of the S195 diesel engine as an example, the main reasons for poor sealing are analyzed as follows: (1) Poor manufacturing quality of the oil seal; (2) Poor quality of the shaft or bearing; (3) Improper use and maintenance; (4) Improper installation; (5) Improper storage, leading to adverse effects from environmental contamination. 2) Countermeasures for leakage due to poor oil seal sealing: Acquire basic knowledge to identify counterfeit and inferior products, and purchase high-quality, standard-compliant oil seals. During installation, if the outer surface of the shaft diameter has low roughness or defects such as rust spots, corrosion, or burrs, polish it smooth with fine sandpaper or an oil stone; apply clean engine oil or lubricating grease to the oil seal lip or the corresponding position on the shaft diameter. Apply sealant to the outer ring of the oil seal, wrap the keyway area on the shaft with hard paper to avoid scratching the oil seal lip, and use special tools to rotate and press the oil seal inward. Never hammer or force it in to prevent deformation of the oil seal or breakage of the spring, which would cause failure; if the lip flips, the spring detaches, or the oil seal tilts, it must be removed and reinstalled. Note: Do not arbitrarily tighten the inner spring when the shaft diameter is not worn and the oil seal spring tension is sufficient. Oil seals used in machinery generally operate under harsh conditions, with large environmental temperature differences, abundant dust, and frequent vibration causing constantly changing stress on components; therefore, frequent inspection, maintenance, and upkeep are required. If the shaft diameter and bearing are severely worn, or if the oil seal rubber ages or the spring fails, repair and replace the corresponding parts promptly. Troubleshoot abnormal heating in components or assemblies immediately; avoid overspeeding or overloading the machinery to prevent increased temperature at the oil seal lip, rubber aging, and premature lip wear. Regularly check the engine oil level; if there are excessive impurities in the engine oil, such as alloy powder or metal iron filings, completely replace it with new engine oil. The brand and quality of the replacement engine oil must meet seasonal requirements. It is recommended to add Metraile Super Sealant & Lubricant to the engine oil. It is an excellent gearbox additive that forms an inert material film on components, which can reduce oil seal leakage, extend the service life of oil seal gears, and reduce gearbox noise. The use of this Metraile super sealant lubricant will not contaminate the oil or cause deterioration.

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