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General knowledge of heat transfer oil pump and selection of sealing structure

Heat transfer oil pump, also known as high-temperature centrifugal pump, can be divided into ry heat transfer oil pump, Bry air-cooled hot oil pump, ry air-cooled high-temperature centrifugal pump and ay single-stage and two-stage centrifugal oil pump. The temperature of transport medium is negative 45-420 ℃, the maximum flow can reach 600m3 / h, and the lift is 30-330m. The raw materials are generally cast iron, cast steel, stainless steel, etc.




When transporting the medium with high temperature, it is necessary to cool down. The common cooling methods include air cooling, electric fan cooling and water cooling. It is selected according to the different application temperature of the pump. During this period, electric fan cooling is especially suitable for areas with water shortage or poor water quality.




Ry heat transfer oil pump the pump has reasonable structure, excellent function and reliable operation. It is suitable for transporting high-temperature liquid without solid particles. Its corrosion resistance and application temperature depend on the data of the primary parts touching the medium. Ry air-cooled heat transfer oil pump.




Applicable scale of heat transfer oil pump.




1. Petroleum and chemical industry.




2. Oil industry.




3. Synthetic fiber industry.




4. Textile printing and dyeing workers, truck oil pump industry.




5. Plastics and rubber industry.




6. Paper industry.




7. Wood industry.




8. Construction industry.




In addition, the heat transfer oil pump is also widely used in machinery industry, food industry, pharmaceutical production, oil supply and circulation system of hot oil furnace and hot oil heating circulation system, and its functional scope (according to the planning point).




1. Cooling water is used to cool the shaft seal cavity, bearing or pump support according to the temperature and application requirements. The water volume of each pipeline is recommended to be 0.3-0.7m3/h and its pressure is 0.2-0.3mpa.




2. The sealing flushing is different according to the pump delivery medium and its working conditions such as temperature and pressure. The sealing liquid volume of each pump chamber is shown in the table below, which can be supplied internally or externally.




The sealing structures selected for centrifugal pumps are:.




1. Single face seal: write in flushing is selected. The flushing fluid is the second-line wax oil at the mercy of 100 ℃, and the pressure is 0.05 ~ 0.15Mpa higher than that in the sealing cavity. Hot water (soft water) is selected for quench outside the gland. The oil pump in the cab can usually be used for one cycle (ten months).




2. Metal bellows mechanical seal: compact structure and convenient installation. Under the same auxiliary system, the service life is 2 ~ 3 times that of the usual seal.




3. Double end face mechanical seal: cycle scouring and external cooling are selected, and the service life is 1.5 ~ 2 times that of single end face.




4. Hard to hard (YG6 / YG8, SiC / SiC, etc.) is selected as the conflict pair, which plays an excellent role in the medium with high viscosity and containing a few solid particles or the medium with crystallization.




1. The domestic centrifugal pump is provided with a cooling water jacket around the sealing cavity to cool with cold water, which can reduce the temperature of the sealing cavity to 200 ~ 250 ℃.




2. For single face seal, write type flushing is selected to introduce clean wax oil at the temperature of 100 ℃ from the outside (diesel oil is usually not necessary, because diesel oil is a finished product), which not only reduces the temperature, but also improves the working environment. It is an effective method.




3. Quench water is selected outside the gland, which can not only reduce the temperature, but also prevent the drainage pipeline from blocking.




The company specializes in producing various truck accessories, mainly including cab lifting oil pump, cab lifting oil cylinder, forklift tilt oil cylinder and steering oil cylinder. At present, the company is dominated by European truck accessories, such as Vlvo Volvo truck, Benz Benz truck, Scania skenia truck, man man truck, Renault Truck, Iveco Iveco truck, DAF Duff truck, etc http://www.hualongjx.cn/ 。


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