After the stainless steel gear pump wears certain wear and tear, it has to carry on good inspection and maintenance, repair and repair according to certain way and principle, arrange and set up in time.
The main surface wear of the stainless steel gear pump is the circular arc working face in the oil absorption section. If there is slight wear, but oil Shixiu grinding deburring after use. The pump body is made of cast iron casting blank, and new parts should be replaced when serious wear is worn.
The end cover of stainless steel gear pump is made of cast iron. After wear phenomenon, it can be milled and leveled on the flat slightly. When worn seriously, it should be grinded and grinded on the surface grinder. The contact between the end cover and the pump body should be no less than the allowable difference of 85%. flatness, the verticality tolerance of the end face to the center line of the hole, the allowable difference of the parallelism between the two ends and the parallel tolerance of the two axis hole center line, all of which are 0.01mm. After grinding, the surface roughness of Ra should not be more than 1.25. If the two sides of the pump gear are repaired by grinding, the width of the pump body should also be changed, which is equal to the size removed from the two ends of the gear. After reprocessing, the two ends of the pump body should meet the standard technical requirements.
The wear of the shaft of the stainless steel gear pump is mainly due to the friction and wear between the two ends of the shaft and the support needle roller, which makes the diameter of the shaft smaller. If it is slightly worn, the diameter of the shaft can be increased by plating a layer of hard chromium, so that the shaft can be repaired. If the shaft wear serious, should be 45 steel or 40Cr steel to manufacture, the shaft blank of coarse and fine car after heat treatment to the bearing parts, the hardness is HRC60-65, and then by grinding, the bearing parts with surface roughness Ra is less than 0.32μ m; shaft roundness and cylindricity tolerance of 0.005mm; matched with the gear positions according to the degree of Ra H7/h6, the surface roughness should be less than 0.63.
Stainless steel gear pump has the advantages of wide application range, strong corrosion resistance, transport of high viscosity, low noise, high efficiency characteristics. We can customize all kinds of stainless steel gear pump flow, pressure, can meet the needs of different customers. The stainless steel gear pump can transport the lubrication of a corrosive medium, medium viscosity can be either that can be used in different industries, and give full play to the role of good value in the industry, but in use will wear a certain condition, the main wear parts of gear tooth is, involute gear face and two plane. When slight wear is worn, the tooth surface can be worn with oil stone, and the two ends are flat on the plate to polish the light. A new gear should be replaced when the gear tooth surface is badly worn. If only the two ends of the gear are worn, the light can be grinded on a plane grinder. The reasons for the wear of the stainless steel gear pump are mainly in the following main aspects.
After maintenance of parts in the stainless steel gear pump, the bearing roller should be replaced. The requirement for rolling needle is: the size error of all roller needles should not exceed 0.003mm, the length allowance is 0.1mm, and the clearance between the shaft and the shaft should be about 0.0lmm. When the needle is assembled, it should be filled in the bearing housing according to the quantity requirement, and the needle needles should be arranged parallel to each other.
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