Study on Optimization of Pump Shaft Transmission System of Plastic Centrifugal Pump

Table 11

Structure and dimension of the pump shaft.

Size code	Design basis	Can it be optimized?
d 1	Match with impeller threaded hole	N
d 2	Greater than the minimum design diameter of the pump shaft, according to the standard of relief groove	N
d 3	Select the diameter reference shaft seal	N
d 4	Refer to the bearing inner ring size	N
d 5	2∼4 mm larger than the bearing inner ring hole size	N
d 6	Refer to the bearing inner ring size	N
d 7	Refer to the dimensions of the through cover and sealing ring	N
d 8	Cooperate with coupling	N
X 1	The sum of X1 and X2 is the depth of the impeller thread hole	N
X 2	According to the relief groove	N
X 3	Greater than shaft seal length	Y
X 4	Less than 1 mm of the bearing width	N
X 5	According to the cantilever length equal to the support span	Y
X 6	Less than 1 mm of the bearing width	N
X 7	Greater than the thickness of the through cover	Y
X 8	Cooperate with the coupling	N