刚柔耦合式小麦脱粒弓齿设计及试验

doi:10.13229/j.cnki.jdxbgxb20190569

Abstract

Abstract:

In order to solve the problems of low threshing rate and high damage rate in wheat threshing, standard bow teeth for wheat threshing were designed Innovatively, and the threshing interface was analyzed. The new rigid flexible coupling bow teeth wheat threshing test bed was designed. The quadratic regression orthogonal tests were carried out to compare the performance of the new bow teeth with that of traditional wheat threshing bow teeth. The results show that the damage rate using the rigid flexible coupling bow teeth is significantly reduced, and the maximum reduction is 1.04%, the threshing rate using the rigid flexible coupling bow teeth was significantly increased, and its maximum increase is 4.64%. The influence degree of test factors on the damage rate of the rigid flexible coupling bow teeth is successively from large to small: drum speed, feeding amount and threshing clearance. Regression model of damage rate of rigid flexible coupling bow teeth was established. The optimal operation parameter combination for minimal damage rate is obtained by response surface analysis, which drum speed is 350 r/min, threshing clearance is 30 mm, and feeding amount is 6 kg/s. The influence degree of test factors on threshing rate of rigid flexible coupling bow teeth was successively from large to small: drum speed, threshing clearance and feeding amount. Regression model of threshing rate of rigid flexible coupling bow teeth was established. The optimal operation parameter combination for maximal threshing rate is obtained by response surface analysis, which drum speed is 600 r/min, threshing clearance is 10 mm, and feeding amount is 3.5 kg/s.

Key words: agricultural mechanization engineering, threshing, bow tooth, rigid flexible coupling, test optimization

CLC Number:

S225.39

Jun FU,Yi-chen ZHANG,Chao CHENG,Zhi CHEN,Xin-long TANG,Lu-quan REN. Design and experiment of bow tooth of rigid flexible coupling for wheat threshing[J].Journal of Jilin University(Engineering and Technology Edition), 2020, 50(2): 730-738.

Figures/Tables 12

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References 21

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水平	滚筒转速 x₁/(r·min^-1)	脱粒间隙 x₂/mm	喂入量 x₃/(kg·s^-1)
r	600	30	6
1	535	22.4	5.35
0	350	20	3.5
-1	165	12.6	1.65
-r	100	10	1

试验编号	试验因素			试验指标/%
试验编号	x₁	x₂	x₃	y₁₁	y₁₂	y₂₁	y₂₂
1	1	1	1	1.28	0.35	94.98	99.12
2	1	1	-1	1.08	0.42	95.71	99.29
3	1	-1	1	1.21	0.43	96.23	99.41
4	1	-1	-1	1.45	0.49	96.26	99.46
5	-1	1	1	1.18	0.39	94.74	98.92
6	-1	1	-1	0.83	0.38	95.39	98.53
7	-1	-1	1	1.25	0.35	94.45	98.83
8	-1	-1	-1	1.02	0.37	94.19	98.51
9	r	0	0	1.29	0.49	96.53	99.72
10	-r	0	0	0.81	0.43	94.12	98.76
11	0	r	0	0.92	0.36	95.29	98.95
12	0	-r	0	1.29	0.41	96.34	99.36
13	0	0	r	1.35	0.31	95.34	99.03
14	0	0	-r	1.25	0.37	96.43	98.89
15	0	0	0	1.11	0.34	96.51	99.08
16	0	0	0	1.02	0.35	96.00	99.16
17	0	0	0	0.99	0.36	96.20	99.05

试验指标	标准弓齿损伤率y₁₁		刚柔耦合式弓齿损伤率y₁₂
试验指标	F₁₁	P₁₁	F₁₂	P₁₂
模型	13.29	0.01	22.97	0.01
x₁	42.45	0.05	67.80	0.05
x₂	24.73	0.05	24.10	0.05
x₃	10.03	0.10	41.95	0.05
x₁x₂	0.05	0.25	50.00	0.05
x₁x₃	12.32	0.10	18.00	0.05
x₂x₃	10.05	0.10	0.50	0.25
x₁²	0.51	0.25	162.30	0.01
x₂²	0.28	0.25	5.78	0.25
x₃²	24.49	0.05	15.68	0.05
失拟项	1.69	0.25	2.80	0.25

试验指标	标准弓齿脱净率y₂₁		刚柔耦合式弓齿脱净率y₂₂
试验指标	F₂₁	P₂₁	F₂₂	P₂₂
模型	11.24	0.01	35.13	0.01
x₁	57.78	0.01	380.71	0.01
x₂	9.68	0.05	21.71	0.05
x₃	17.06	0.10	12.24	0.10
x₁x₂	9.93	0.10	12.56	0.10
x₁x₃	0.75	0.25	33.44	0.05
x₂x₃	0.70	0.25	0.10	0.25
x₁²	23.23	0.01	2.13	0.05
x₂²	4.51	0.10	0.43	0.25
x₃²	3.02	0.05	30.30	0.05
失拟项	2.34	0.25	2.66	0.25

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Design and experiment of bow tooth of rigid flexible coupling for wheat threshing

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