Circular arc gear pump disassembly and assembly

Circular arc gear pump disassembly and assembly - 2021 03 - 04 Luo Ronggang ( Zenith steel thermal power plant) One, the disassembly of the pump 1, removing the shaft end coupling, such as found with tight available tongbang gently knock, or remove by puller, not with a heavy hammer percussion. 2, removing the pump shaft end cap, and then removing the flexible graphite ring or mechanical seal. 3, remove the front and back cover, then remove the gasket. 4, remove the bearing seat, take out the main, driven shaft gear. 5, remove the main, thrust nut on the driven shaft, remove the left-handed and right-handed gear. Remove the relief valve: 6, first remove the protective cap, gasket and the nut, and then choose the adjusting bolt. Remove the spring and the valve core. Finally remove the body and gasket. Two, pump inspection after opening will check each parts, such as found that the wear must be behind the repair or replacement parts to assembly. Three, the repackaging of the pump assembly sequence is the opposite of disassembly sequence. At the same time pay attention to the following points: 1, all parts must be made until they have passed the check assembly. 2, into the pump body parts must be clean, and coated with lubricating oil, the assembly may not be into the dirt and sundries. 3, upper and lower bearing and the main and the passive gear assembly, each pair of bearing the difference in size and thickness of each pair of gears, shall not be greater than zero. 005mm。 4, the gear side clearance application gasket adjustment, clearance is too large to drain back, lower the efficiency; Is too small, easy to make the pump temperature too high or killed. 5, with dedicated sleeve assembly flexible graphite ring or mechanical seal ring. Flexible graphite must take put down light. It is strictly prohibited to tamper with disorderly use, in case of broken or deformation. 6, after the assembly, the application of hand rotation gear, uneven weight or rushed not a phenomenon.