First, the pump shaft is supported by a single row of radial ball bearings. The bearing can be lubricated with lubricating oil - the oil quantity is controlled between the markings of the oil marker post; It can also be lubricated with grease - it can be added when assembling the water pump. It is supplemented by disassembling the front cover and rear cover during use; The screw plug at the upper end of the pump body is used for filling and water diversion or connecting the vacuum pump for air extraction and water diversion.
Secondly, the diesel engine mixed flow pump is mainly composed of pump cover, impeller, packing chamber, pump body, pump shaft, shaft sleeve, bearing body (diameter ≤ 350mm) or bearing frame (diameter ≥ 400mm). The shaft sleeve is used to protect the pump shaft. It can be replaced in time after wear.
The third is that the pump cover is respectively connected with the pump body and the water inlet pipe. There should be a proper clearance between the pump cover plane and the impeller plane. If the clearance is too small, friction will occur; Excessive clearance will cause a large amount of pressure water in the pump body to return, reducing the efficiency of the pump. The appropriate clearance for actual use is 0.3~0.7mm (push the pump shaft to the inlet end of the pump). The clearance can be adjusted by increasing or decreasing the thickness of the paper pad.
Finally, in order to expand the application range of the pump and meet the different requirements of users, the outer diameter of the impeller can be cut or the impeller with different performance can be replaced. The shaft seal device is composed of packing, packing gland, packing ring and stuffing box on the pump body. Its function is to prevent air from being sucked into the pump and water from flowing out of the pump too much along the shaft.
