Design and technical standard of FRP submerged pump oil seal

[Asia Pump Network News] FRP submerged pump oil seal design options, bearing housing gland and seal between the seal structure for the labyrinth seal, the labyrinth seal plus a dust ring, the sealing performance is poor. Therefore, it is very necessary to improve the structure of crude oil seal and develop a new type of oil seal structure with excellent sealing performance and long service life. FRP liquid pump seal design and technical standards are as follows: FRP liquid pump seal design and technical standards Pump operation due to the oil level limit, the lower end of the nut immersed in the oil pool, the lubricant stirred up along the gland The surface drip, drip directly to the rotating shaft, a lot of oil accumulated on the shaft, driven by the rotating shaft, the oil crawling along the shaft, into the gap between the gland and the shaft labyrinth seal, labyrinth seal larger gap, and seal resistance smaller, oil Once into the labyrinth is difficult to get back, and thus constantly thrown along the axis, the formation of oil accumulation in the shaft end, the labyrinth and dust ring can not play a sealing effect, that oil spills. From the above analysis we can see that the main problem of the crude oil seal structure is that the bearing lock nut is too big and the labyrinth sealing gap is too big to be effective sealing effect. The new anti-leak oil structure should meet the following requirements: First of all, to ensure the sealing part of the combination. Meanwhile, the structure is compact, the system is simple, the manufacture and maintenance are easy to use, the finished product is low, the work is reliable, and the service life is long. The main reason for the oil spill, should start with the following two aspects to improve to prevent oil spills. The depth of immersion of the bearing lock nut (the relative distance between the fluid level and the lock nut) is an important factor affecting the amount of oil thrown off. Reduce the nut diameter, can reduce the oil immersion depth, reduce oil mixing, thereby reducing the amount of oil fell on the shaft, indirectly reducing oil leakage. Sealing principle point of view can consider packing or blocking, separation, leads to or injection and flow resistance, reverse transport, and combinations of these programs and other methods. First of all, you can take a mechanical seal. According to mechanical seal performance, scope of application, life expectancy, mechanical seal can be applied, but the mechanical seal price is high, complex structure, the required space, disassembly inconvenience, not suitable for such a small space structure. Second, consider the use of lead-out or injection method to achieve the sealing requirements, but the need for auxiliary devices, the structure is complex, and therefore undesirable. Consider the use of packing and blocking methods, because of the longer life expectancy, some contact seals such as felt ring, gear ring, seals, seals and other contact with the shaft wear and tear, limited life expectancy, not suitable for high-speed long-cycle operation, and easy Axis occurs, and thus ruled out. Above is the FRP submerged pump oil seal design and technical standards, hope that through the above description, can help you to study a better FRP submerged pump products. Further reading: IFAT China Guangzhou exhibition industry leaders building water pump manufacturers ranking article belongs to Internet industry (Xiamen) Co., Ltd. All are welcome to reprint, please indicate the source and author of: Asian pumps Network Editor: lindj (QQ / WeChat:) Starting: http://beng.liuti.cn/ (Service Hotline:)

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