As a component and a working device, a hydraulic cylinder, like all mechanical equipment, will inevitably have varying degrees of wear, fatigue, corrosion, loosening, aging, deterioration or even damage in its structural components during long-term operation. Phenomenon, which makes the performance and technical condition of the hydraulic cylinder deteriorate, and then directly causes the failure or even failure of the entire hydraulic equipment. Therefore, it is very important to eliminate and repair common problems in the daily work of hydraulic cylinders.
The so-called construction machinery repair kit is one of many seals, which is composed of RBB, PTB, SPGO, WR, KZT, dust seals and so on.
RBB\PTB: Piston rod seals and buffer seals maintain sealing contact between the hydraulic cylinder head and the reciprocating piston rod. Depending on the application, the rod seal system can consist of a rod seal and a buffer seal or only a rod seal. Rod seal systems for heavy-duty equipment generally consist of a combination of two seals, with a cushion seal positioned between the rod seal and the piston in the cylinder head. The piston rod seal determines the tolerance for the piston rod diameter d. In addition to their sealing function, rod seals provide a thin lubricating oil film on the piston rod for self-lubrication and lubricate the dust seal. Lubricants also prevent corrosion on the piston rod surface. However, the lubricant film must be thin enough to be sealed back into the cylinder on the return stroke. The selection and material selection of the piston rod sealing system is a complex task, which needs to consider the overall design and application conditions of the hydraulic cylinder. SKF offers a wide range of rod and cushion seals in different cross-sections, materials, series and sizes to suit a variety of conditions and applications.
SPGO: 1. Use and performance: standard bidirectional seal, wide application range. The friction resistance is very low, there is no crawling phenomenon, the wear resistance is strong, and the installation space is saved. 2. Standard material: sealing ring (filled with polytetrafluoroethylene PTFE), O-ring (nitrile rubber NBR or fluorine rubber FKM. 3. Working conditions:Diameter range: 20-1000mm, pressure range: 0 - 35MPa, temperature range: -30 to +200°C, speed: no more than 1.5m/s, medium: general hydraulic oil, retardant oil, water and others.
WR: Phenolic cloth support ring, wear-resistant ring, and guide ring are made of special desizing fine white cloth impregnated with phenolic resin, rolled by heating, and turned. It has high mechanical properties, good oil resistance, and low Excellent water absorption and high wear resistance, it can be widely used in wear-resistant support rings of hydraulic cylinders.
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KZT: 1. Use and performance: The antifouling ring is used in combination with the piston seal and the anti-wear ring to prevent the oil in the cylinder from being mixed with external impurities to cause the accumulation of pressure loss on the seal. bad, to ensure a long service life of the seal. When used in conjunction with rod seals and metal bushings, it prevents damage to the piston rod. At the same time, there is a cutout and oil pressure bypass groove to prevent the accumulation of oil pressure. 2. Standard material: sealing ring: filled with polytetrafluoroethylene PTFE.
Dust Seals: Hydraulic cylinders can perform in a variety of applications and environmental conditions, including exposure to dust, debris or external weathering. To keep these contaminants from entering the hydraulic cylinder components and hydraulic system, dust seals (also known as wiper rings, wiper rings or wipers) can be installed on the outside of the hydraulic cylinder head. The dust seal maintains a sealing contact force against the piston rod when the equipment is at rest (static, the piston rod does not move) and in use (dynamic, the piston rod reciprocates), while the tolerance of the piston rod diameter d is determined by the piston rod seal Sure. Without the dust seal, the returning piston rod could introduce contamination into the cylinder. The static sealing effect of the wiper seal at the outer diameter of the groove is also very important to prevent moisture or particles from entering the periphery of the wiper seal.
Post time: Feb-20-2023