German Tlt-Turbo seals Tlt-Turbo models Tlt-Turbo prices

Tlt-Turbo seals are the customary term for general seals, simply referring to lubricating oil seals. They are mechanical components used to seal grease (oil is the most common liquid substance in transmission systems, and also refers to general liquid substances), isolating the parts requiring lubrication in the transmission components from the output parts to prevent lubricating oil leakage. Seals used for static sealing and dynamic sealing (generally reciprocating motion) are called oil seals. The representative form of oil seals is the TC oil seal, which is a double-lip oil seal with a self-tightening spring fully covered by rubber; the term 'oil seal' generally refers to this type of tc cased oil seal.

Tlt-Turbo seal principle

Mechanical seals are shaft sealing devices that achieve leak prevention by maintaining contact between one or several pairs of end faces sliding relative to each other perpendicular to the axis, under the action of fluid pressure and the elastic force (or magnetic force) of the compensation mechanism, supplemented by auxiliary seals. Common mechanical seal structures consist of stationary rings (static rings), rotating rings (dynamic rings), elastic element spring seats, set screws, rotating ring auxiliary O-rings, and stationary ring auxiliary O-rings. Anti-rotation pins are fixed on the gland to prevent the stationary ring from rotating. Rotating rings and stationary rings can also be referred to as compensation rings or non-compensation rings based on whether they have axial compensation capability.

Tlt-Turbo seal system composition

1) Gland housing: In the past, gland housings used for mechanical seals were stuffing boxes designed for soft packing seals. They are unsuitable for mechanical seals, not only because they are too small and have too narrow clearances, but also because their simple cylindrical shape is inappropriate. Standards for enlarged gland housings for mechanical seals have been established abroad. In addition, Durametallic Corporation in the United States and the Fluid Sealing Association (formerly the British Hydromechanics Research Group) are studying rational gland housings for mechanical seals. Their shapes should not only facilitate fluid flow and heat dissipation but also help remove solid particles, providing a favorable environment for the seal. 2) Volatile emission control system: In the past, attention was focused only on eliminating visible fluid leaks, while neglecting the control of invisible volatile emissions. This has led to environmental pollution and poses risks to equipment and personnel. Organizations abroad, such as the Sealing Technology Committee of the Society of Tribologists and Lubrication Engineers (STLE) in the United States, have developed guidelines for controlling volatile emissions from 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 stages. It clearly defines barrier fluids and buffer fluids, clarifying erroneous and confusing concepts. 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 is used between dual seals as a lubricant or cushion; its pressure is always lower than that of the sealed process fluid. 3) Supporting auxiliary systems: Auxiliary systems for mechanical seals require supporting components for cooling, heating, flushing, and other functions. Pump circulation needs optimization, and issues such as condition monitoring systems are being studied and resolved. The supporting requirements for auxiliary systems are specified in the API-682 standard. 4) Gas barrier seal system: In the past, liquid barriers were commonly 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, and other methods to seal gases and liquids.

Tlt-Turbo seal specifications and applications

1) Standard single-lip type: Generally used for sealing mineral oil, water, and other media on high- and low-speed rotating shafts and reciprocating motions. Standard oil seals are used in environments with less dust and impurities, resistant to media pressure< 0.05MPa, maximum linear speed 15m/s, reciprocating speed< 0.1m/s. 2) Standard double-lip type: In addition to the usage characteristics of the aforementioned S type oil seals, it also provides dust protection. Standard oil seals with a dust lip can prevent dust ingress, resistant to media pressure< 0.05MPa, linear speed ≤ 15m/s. 3) Springless type: Springless single-lip inner-cased rubber oil seal. Generally suitable for low-speed conditions where the sealing medium is lubricating grease. Linear speed ≤ 6m/s. 4) Outer-cased single-lip type: Single-lip outer-cased rubber oil seal with spring, featuring a thin waist, good followability, and good rigidity. Standard oil seals are used in environments with less dust and impurities, resistant to media pressure< 0.05MPa. For rotational axis speeds ≤ 15m/s. 5) Outer-cased double-lip type: Double-lip outer-cased rubber oil seal with a secondary lip, featuring a thin waist, good followability, high rigidity, and good concentricity. Standard oil seals with a dust lip can prevent dust ingress, resistant to media pressure< 0.05MPa. Rotational speed ≤ 15m/s. 6) Assembled single-lip type: Outer-cased oil seal assembled from inner and outer casings with rolled edges, featuring high installation precision, fast heat dissipation, and heavy-load characteristics. Suitable for heavy-load conditions under high temperature and high speed, media pressure ≤ 0.05MPa, maximum linear speed ≤ 15m/s. 7) Unidirectional return type (right-hand, left-hand): Angled ribs are manufactured on the air side of the lip, utilizing hydrodynamic principles to generate a unidirectional pumping action with a return effect. Related to the shaft's direction of rotation, the radial force is smaller than that of standard oil seals due to the return effect, reducing wear and heat generation, and extending service life. Suitable for media pressure< 0.05MPa, rotational speed ≤ 20m/s. 8) Pressure-resistant type: Short lip and short, thick waist, providing pressure resistance, working pressure ≤ 3MPa. Suitable for applications with media pressure ≤ 3MPa, suitable for shaft end oil seals of high-pressure pumps. Generally, the PV value ≤ 8. Rotational axis speed ≤ 15m/s.

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