Coal chemical industry with a high ash water circulation pump mechanical seal and bearing box component design

The design of the coal chemical industry with a high ash water circulation pump mechanical seal:

will make high ash water circulation water pump to achieve stable, long-term, reliable operation, must be carefully designed high quality mechanical seal. How to use a new material, new technology, improve the 杋 machinery seal of high temperature resistant, resistant to high pressure and resistance to abrasion is an important research direction.

high ash shaft seal of high pressure water pump mechanical seal, the United States API682 mechanical seal standard is not applicable, must have a unique design method. Using single end face, built-in type, spring, balanced, container type mechanical seal, the main sealing materials ( Dynamic and static ring with high strength, high wear resistance materials, spring of imported hartz C alloy, sealing ring using fluorine rubber and ptfe Ⅴ ring; This mechanical seal design pressure for 12 - 25 mpa, design temperature is 350 ℃, can meet the requirements of working condition of use. For high temperature and high pressure mechanical seal design we have applied for a patent, the patent characteristics: on the ring and static ring end face to open several uniform fluid dynamic pressure groove, when sealing ring spinning, tank can make the liquid cooling strongly with the seals it far away during this cooling, at the beginning of the sealing ring is formed on the surface and the slot number equal the comet lubrication wedge. It can satisfy the transmission medium of high temperature and high pressure to keep for a long time without leakage, and can satisfy the 杋 machinery seal of high reliability, high stability and flexibility under the condition of high pressure to follow, so as to improve the service life of pump.

mechanical seal cooling by API PLAN32 irrigation, cooling scheme of the mechanical seal chamber, which is formed by head and 杋 sealing gland in the head end design high wear-resisting throttling of hard alloy ring, cooperate with pump shaft, wear-resisting throttling ring between the head and asked the gap should be calculated according to the temperature curve of the selected material design. The device should be equipped with independent pressurized water system, machine seal washing water pressure should be bigger than the outlet pressure of the pump 0. About 2 mpa.

coal with high ash water water pump bearing box component design

high-pressure ash water circulation pump work when the inlet pressure is very high, the impeller under axial force and radial force, bearing housing components must be designed, want to consider thrust bearing can bear a large axial force, bearing housing and shaft must have high strength, stiffness and reliability, before and after bearing must be able to bear all of the axial force and radial force. Since the water pump at the inlet pressure when debugging, not with pressure difference before and after impeller cover plate pointing in the pump suction, and at the inlet pressure, the pressure difference between the before and after impeller cover plate direction pointing to the driver side of the pump, so in bearing box drive side design with the double row angular contact ball bearings and a reverse installation with double row angular contact ball bearing of single row angular contact ball bearings, and the radial force all by the design of the pump is installed in bearing box at the front of the cylindrical roller bearing.

high ash water circulation pump working temperature is high, bearing box should design a larger tank, thin oil lubrication bearing lubrication is adopted. To bearing cooling and lubricating oil, well bearing box must also have a larger water cooling cavity design, cooling water is calculated after heat shield, make to the motor temperature to the temperature of the motor can withstand.

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