Optimization of the Stirring Blade Structure of the Pumping Unit Based on the Improvement of Concrete Suction Efficiency

Table 5

The single-factor comparison scheme.

No.	Edge distance d (mm)	Installation angle α (°)	Rotation speed n (r/min)
1	—	40	20
2	—	40	25
3	—	40	30
4	—	40	35
5	—	35	25
6	—	45	25
7	—	50	25
8	50	40	25
9	40	40	25
10	30	40	25

“—” means that the mixing blade does not perforate.