## 5 Seed Displacer Seed-Filling Performance Bench Tests
### Test Results and Analysis  
Since the nine groups of four-factor, three-level orthogonal tests did not have enough degrees of freedom for multifactorial ANOVA, a tenth group of non-replicated experiments was added to allow for the analysis of the results of subsequent experimental studies. The results of the test on seed-filling performance of the seeder are shown in Table 4. The test results of each evaluation index of seed-filling performance are analyzed as follows. (1) Analysis of the results of the suction seed compliance test  
Through the results of extreme difference analysis in Table 5, it can be seen that the factors affecting the seed absorbing pass rate of the seed displacer are, in order of priority, seed disk style \(A>\) fan negative pressure value \(C>\) origin disk rotation speed B \(>\) hole diameter D, and the best parameter combinations are A\({}_{2}\)B\({}_{2}\)C\({}_{3}\)D\({}_{3}\). From the F-value, it can be seen that the impact of the seed disk style A on the seed-absorbing pass rate of the seed displacer is significant, which proves that the linear serrated disk can effectively improve \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline  & & \multicolumn{4}{c}{**Considerations**} & \multicolumn{4}{c}{**Test Indicators**} \\ \cline{2-7}
**Test No.** & **Seed Dispenser** & **Seed Discharge** & **Fan Negative** & **Hole Diameter** & **Suction Pass** & **Leakage Rate L**, \\  & **Style A** & **rpm** & **C, pa** & **D, mm** & **Rate X, \%** & **\%** \\ \hline
1 & 1 & 1 & 1 & 1 & 87.40 & 6.14 \\
2 & 1 & 2 & 2 & 2 & 89.89 & 5.79 \\
3 & 1 & 3 & 3 & 3 & 90.72 & 5.29 \\
4 & 2 & 1 & 2 & 3 & 94.16 & 4.32 \\
5 & 2 & 2 & 3 & 1 & 95.13 & 3.97 \\
6 & 2 & 3 & 1 & 2 & 93.20 & 4.77 \\
7 & 3 & 1 & 3 & 2 & 91.97 & 2.29 \\
8 & 3 & 2 & 1 & 3 & 90.95 & 3.14 \\
9 & 3 & 3 & 2 & 1 & 91.30 & 1.48 \\
10 & 1 & 2 & 2 & 1 & 90.02 & 5.34 \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Orthogonal test results. \begin{table}
\begin{tabular}{c c c c c} \hline \hline  & & \multicolumn{4}{c}{**Considerations**} \\ \cline{2-5}
**Level (of Achievement etc.)** & **Seed Dispenser Style** & **Seed Discharge Disk** & **Fan Negative Pressure** & **Hole Diameter D,** \\  & **A** & **Speed B, rpm** & **Value C, Pa** & **mm** \\ \hline
1 & A flat disk & 30 & \(-1500\) & 1.0 \\
2 & Linear serrated disk & 40 & \(-2000\) & 1.1 \\
3 & Circular sawtooth & 50 & \(-2500\) & 1.2 \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Seed-filling performance factor levels. the seed-filling performance of the seed displacer to improve further the origin absorbing pass rate of the seed displacer. (2) Analysis of leakage rate test results  
From the results of the extreme difference analysis in Table 6, it can be seen that the factors affecting the leakage rate of the seeder are, in order of precedence, seed discharging disk style A \(>\) fan negative pressure value C \(>\) seed releasing disk rotational speed B \(>\) diameter of the holes D, and the optimal parameter combinations are A3B3C3D1. From the F-value, it can be seen that the seed discharging disk style A and the negative pressure value of the fan C have a very significant effect on the leakage rate of the seeder. So, it is essential to reasonably control the negative pressure value in the chamber cavity to ensure that seeds can be accurately and steadily adsorbed at the hole in the air chamber, thus reducing the leakage rate of the seeder.