The wear of the shaft in the stainless steel circular arc 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 0.63μ M. Health level self-priming pump
The shaft seal of YCB stainless steel circular arc gear pump is designed in two forms. One is mechanical seal, the other is packing seal. It can be determined according to the specific usage and user requirements. The user can consider the circular arc gear pump when the economic condition is allowed. It is suitable for transporting lubricating oil with viscosity of 5&times, 10-6 ~ 1.5&times, 10-3m2/s (5-1500cSt) and temperature below 200 c. The scope of application of YCB series of stainless steel circular arc gear pumps. After preliminarily determining the use of circular arc gear pump, we should further confirm its seal: one is alloy steel mechanical seal, the other is high temperature packing seal, which can be determined according to user specific working condition.
The YCB stainless steel circular arc gear pump is equipped with a safety valve for overload protection, and the full reflux pressure of the safety valve is 1.5 times the rated discharge pressure of the pump. It can also be adjusted in accordance with the actual needs in the range of allowable discharge pressure. However, it is noted that this safety valve can not work as a pressure relief valve for a long time and can be installed on the pipeline when needed. In the material aspect, the circular arc gear pump can have the common cast steel material, has the tin bronze impeller material, has the stainless steel corrosion resistant material. A copper gear can be used to transport low internal liquid, such as gasoline, benzene, etc. Besides the common motor, this series pump can also be equipped with the same specifications of the explosion-proof motor according to the needs of the user.
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