Reinforced graphite packing (stainless steel wire reinforced graphite packing, nickel wire reinforced graphite packing)
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Reinforced graphite packing (stainless steel wire reinforced graphite packing, nickel wire reinforced graphite packing)
The graphite packing is woven from a stainless steel wire reinforced graphite wire into a flexible and high-strength braided packing. The excellent sealing properties achieved with the combination of other packings make it an excellent sealing material, especially at high pressures. It is also a unique universal sealing packing. Recommended for petroleum equipment, power plants, chemicals, steel mills, etc. Suitable for hot water, high temperature, high pressure, steam, heat exchange medium, ammonia, hydrogen, organic solvents, hydrocarbons, cryogenic liquids and other media. It is also a unique universal sealing packing.
Packing, also known as sealing packing, is usually woven from a softer thread, usually with a square or rectangular, rounded strip filled in the sealed cavity to achieve a seal. The packing seal was firstly plugged with fibers such as cotton and linen in the leakage passage to prevent leakage of the liquid, and was mainly used as a shaft seal for the water lifting machine. Due to the wide source of fillers, easy processing, low price, reliable sealing and simple operation, it is still used today. Packing is now widely used in rotary shaft seals for centrifugal pumps, compressors, vacuum pumps, mixers and marine propellers, piston pumps, reciprocating compressors, reciprocating shaft seals for refrigerators, and rotary seals for various valve stems. .
Edit this paragraph packing structure and principle introduction of enhanced graphite packing (stainless steel wire reinforced graphite packing, nickel wire reinforced graphite packing)
The packing seal is filled in the stuffing box by the packing, and the packing is pressed against the surface of the shaft through the packing gland. Since the surface of the shaft is always rough, it can only partially fit with the filler, while the part is not in contact, which forms numerous labyrinths. When the pressurized medium passes through the surface of the shaft, the medium is throttled multiple times, and the "maze effect" is used to achieve the seal. The sealing and friction of the filler and the surface of the shaft are similar to those of the sliding bearing. The solid should have sufficient liquid for lubrication to ensure a certain life of the seal, the so-called "bearing effect". This shows a good packing seal, which is a combination of the labyrinth effect and the bearing effect. The pressing force of the packing against the shaft is produced by tightening the gland bolts. Reinforced graphite packing (stainless steel wire reinforced graphite packing, nickel wire reinforced graphite packing). Because the packing is an elastoplastic body, when subjected to axial compression, friction is generated, so that the pressing force is gradually reduced along the axial direction, and at the same time The radial pressing force causes the packing to adhere to the surface of the shaft to prevent leakage of the medium. The distribution of the radial pressing force is from the outer end (gauge) to the inner end. It is firstly sharply decremented and then flattened. The distribution of the medium pressure gradually decreases from the inner end to the outer end. When the external medium pressure is zero, the leakage is very high. Less, leaks greater than zero. With the continuous emergence of new materials, the structure of the packing structure has also changed a lot, which will undoubtedly promote the application of packing sealing more widely. The material used as the packing should have the following characteristics: certain elastoplasticity. When the packing is axially compressed, it can generate a large radial pressing force to obtain the seal; when the machine and the shaft have vibration or the shaft has jump and eccentricity, it can have a certain compensation capacity (following); chemical stability Sex. It is neither corroded by the medium, swelled, or contaminated with the medium; impervious. The medium has some penetration into most of the fibers, so the packing structure is required to be dense. Therefore, it is necessary to impregnate and fill various lubricants and fillers when making the filler; the self-lubricating property is good, the friction coefficient is small and wear-resistant; temperature resistance . When the friction is heated, it can withstand a certain temperature; the disassembly is convenient; the manufacturing is simple and the price is low. Reinforced graphite packing (stainless steel wire reinforced graphite packing, nickel wire reinforced graphite packing)
