The stainless steel gear pump must be inspected and repaired after certain wear and tear, and maintenance and repair according to certain way and principle, and timely arrangement and setting.
The surface wear of the stainless steel gear pump is mainly the circular working face of the oil-absorbing zone. If slight abrasion occurs, use oil stone to remove burr. The pump body is made of cast iron casting blank, and new parts should be replaced when serious wear occurs.
The end cover of stainless steel gear pump is made of cast iron, and after the wear and tear, it can be slightly polished on the flat plate, and it should be smoothed on the surface grinding machine when the wear is serious. After grinding the end cover connected to the pump body with the plane of the contact shall be not less than 85%. The flatness tolerance, end face hole centerline straightness tolerance and both ends of the parallel degree of tolerance and both of the center line of the shaft hole parallelism tolerance is 0.01 mm. The surface roughness after grinding should not be greater than 1. 25μ M. If two end face grinding repair, internal gear pump, pump body, also want to change the width and the size of the gear grinding out on both ends are equal, the pump body after reprocessed two end should reach the standard of technical requirements.
The abrasion of the shaft in the stainless steel gear pump is mainly caused by the friction and wear between the two ends of the shaft and the supporting roller, making the shaft diameter smaller. If it is slightly worn, the diameter of the shaft can be increased by plating a layer of hard chrome, so that the shaft can be repaired. If worn axis, it should be 45 steel or 40 cr steel to manufacture, shaft blank after the coarse and fine car, bearing parts to heat treatment, hardness of HRC60-65, and then after grinding, make bearing fit parts surface roughness Ra no greater than 0.32 & mu; M; The roundness of the shaft and the tolerance of the cylinder are 0.005mm; According to H7/h6 and surface roughness Ra should not be greater than 0.63&mu. M.
Stainless steel gear pump has wide application scope, strong corrosion resistance, high viscosity, low noise, high efficiency characteristics. Our company can customize various flow and pressure of the stainless steel pump, can meet the needs of different customers. Lubricity of stainless steel pump can transport corrosive medium, can both viscosity of medium height, can be used in different industries, and give full play to the role of the good value in the industry, but in use, there will be a certain wear gear wear and tear parts mainly on both ends of the tooth meshing, working surface and involute gear plane. When slightly worn, the tooth surface can be grinded with oil stone, and the two ends are polished on the flat plate. New gear should be replaced when gear tooth surface is badly worn. If it is only worn on both ends of the gear, it can be polished and polished on the surface grinding machine. The cause of wear of stainless steel gear pump is mainly in the following main aspects.
After repair of parts in stainless steel gear pump, the bearing roller should be replaced. The requirement for the needle roller is: the size error of the whole needle diameter should not exceed 0.003mm, the length tolerance is 0.1mm, and the clearance between the shaft and the shaft should be about 0.0 LMM. When the needle roller is assembled, the bearing shell should be filled according to the quantity, and the needle should be arranged in parallel.
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