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<p>Why should hydraulic pressure use seals? The reason is very simple. The oil leakage from the high-pressure cavity of the hydraulic cylinder to the relatively low-pressure cavity is called internal leakage. Of course, there is also a problem called external leakage, which is the oil leakage of the hydraulic cylinder to the outside, there are many consequences brought by leakage, which will not be described in detail here. There are many sealing methods adopted by hydraulic cylinders, including Gap sealing, rubber sealing ring sealing, combined sealing, etc. </p><p><br></p><p>What are the types of <a href="https://www.dshseals.com/products" rel="noopener noreferrer" target="_blank">hydraulic cylinder sealing rings</a> that Dongsheng rubber and plastic will introduce to you? Sealing rings play a key role in the sealing of hydraulic cylinders and are essential, what kinds of sealing rings are there? O-ring seal.</p><p><br></p><p> The O-ring is named because its cross section resembles an O-ring. In most cases, it is made of rubber, such as dsh rubber, fluorine rubber, silica gel, etc. , but it is not as good as polyurethane in overall wear resistance. It is known that the hydraulic cylinder system generally plays the role of static sealing.</p><p><br></p><p> Second, U-shaped sealing ring. In fact, this kind of sealing ring belongs to a kind of lip-type sealing ring. This kind of sealing ring is often used in combination because it is easy to roll when working alone, the sealing resistance of this kind of sealing ring will gradually increase with the increase of working pressure, so the U-shaped sealing ring is more suitable for use in hydraulic cylinders with relatively low working pressure or low moving speed. </p><p><br></p><p>Third, V-shaped sealing ring. V-shaped sealing ring is actually a combined sealing product. Its supporting ring and pressure ring can make it better adapt to various working environments and produce more efficient sealing effect. And the V-shaped sealing ring can produce accumulation effect, and accumulate different numbers of V-shaped sealing rings according to different working pressures. The function of the pressure ring can well adjust the wear compensation of the sealing ring during work. Because the structure of this sealing ring is relatively complex and the friction resistance is large, therefore, it is suitable for use in hydraulic cylinders with low transportation speed and high working pressure. </p><p><br></p><p>Fourth, YX-shaped sealing ring. Yx-shaped sealing ring also belongs to the category of lip-shaped sealing ring. The characteristic of YX-shaped sealing ring is that the aspect ratio of its cross section is greater than 2, because the non-working lip of YX-shaped sealing ring is slightly longer than the working lip, therefore, its stability in work is higher. YX-shaped sealing ring is divided into shaft and hole. Because it has the characteristic of not rolling easily, it is suitable for high-speed and high-pressure hydraulic cylinders. </p><p><br></p><p>Fifth, lace sealing ring. This kind of sealing ring strictly belongs to the range of combined seals. He is the combination of O-ring and Y-ring, and he also has the characteristics of these two seals. In the work of hydraulic cylinder, since the function of pressure oil is that the O-ring generates deformation and always squeezes and propels the sealing lip of the Y-ring to make it close to the sealing surface and together with the initial contact stress to prevent the leakage of pressure oil. </p><p><br></p><p>Sixth, the whole of the gramophone ring is similar to the above. The Gramophone ring is the combination of the O-ring and the square seal ring, which has the difference between the hole and the shaft. In the operation mechanism, it is the same as the lace seal ring, therefore, it is also suitable for hydraulic cylinders with high pressure and high speed. </p>
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