Journal of Jilin University(Engineering and Technology Edition) ›› 2019, Vol. 49 ›› Issue (4): 1228-1235.doi: 10.13229/j.cnki.jdxbgxb20181110

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Effects of vibration mode on interface adhesion law of rice threshed mixtures

Chao CHENG1,2(),Jun FU1,2(),Xin⁃long TANG3,Zhi CHEN2,4,Lu⁃quan REN1,2   

  1. 1. Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130022, China
    2. College of Biological and Agricultural Engineering, Jilin University, Changchun 130022, China
    3. Agriculture Test Station, Jilin University, Changchun 130062, China
    4. National Machinery Industry Co. , Ltd. , Beijing 100080, China
  • Received:2018-11-09 Online:2019-07-01 Published:2019-07-16
  • Contact: Jun FU E-mail:chengchao17@mails.jlu.edu.cn;fu_jun@jlu.edu.cn

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Abstract:

During cleaning process of rice combine, the rice threshed mixtures could adhere to or block the sieve surface. In order to study the interface adhesion law of rice threshed mixtures under different vibration modes, three modes of vibration test bench were designed, including linear vibration, circular arc vibration and jitter. The adhesive mass on working face under three vibration modes kept stable when the vibration time exceeded 15 s. When the vibration amplitude was increased from 10 mm to 30 mm, the adhesive mass on the working face under three vibration modes was effectively reduced. As the vibration frequency was increased from 2 Hz to 3.5 Hz, the adhesive mass on the working face under three vibration modes was quickly reduced. The acceleration peak value of linear vibration working face was obviously higher than that of circular arc vibration and jitter. The linear vibration working face has the best anti-adhesion effect. The influences of test factors on the anti-adhesion capabilities of linear vibration working face in descending order are amplitude, frequency and vibration time. The influence of test factors on the anti-adhesion capabilities of circular arc vibration and jitter working face in descending order are frequency, amplitude and vibration time.

Key words: agricultural mechanization engineering, rice threshed mixtures, cleaning sieve, vibration mode, interface adhesion

CLC Number: 

  • S225.4

Fig.1

Picture of linear vibration test rig"

Fig.2

Schematic diagram of linear vibration test rig"

Fig.3

Picture of circular arc vibration test rig"

Fig.4

Schematic diagram of circular arc vibration test rig"

Fig.5

Picture of jitter test rig"

Fig.6

Schematic diagram of jitter test rig"

Fig.7

Sticky materials in rice threshed mixtures"

Fig.8

Change rule of weight of adhesion on vibration working face along vibration time"

Fig.9

MDR vibration acceleration testing device"

Fig.10

Time domain curves of center acceleration of vibration working face"

Fig.11

Change rule of weight of adhesion on vibration working face along vibration amplitude"

Fig.12

Peak acceleration curve of vibration working face with amplitude"

Fig.13

Change rule of weight of adhesion on vibration working face along vibration frequency"

Fig.14

Peak acceleration curve of vibration working face with vibration frequency"

Table 1

Orthogonal experimental scheme and results"

试验序号

振动

时间/s

 振幅/mm 振频/Hz y 1/g y 2/g y 3/g
1 10 25 3 1.535 1.552 1.573
2 10 30 3.5 1.342 1.424 1.455
3 10 35 4 1.006 1.051 1.062
4 15 25 3.5 1.341 1.526 1.507
5 15 30 4 1.128 1.339 1.324
6 15 35 3 1.214 1.304 1.325
7 20 25 4 1.206 1.256 1.287
8 20 30 3 1.228 1.441 1.462
9 20 35 3.5 1.121 1.362 1.393

Table 2

Range analysis result of weight of adhesion on working face under linear vibration"

指标 振动时间/s 振幅/mm 振频/Hz
最优组合 20 35 4
y 11 1.294 1.361 1.326
y 12 1.228 1.233 1.268
y 13 1.185 1.114 1.113
R 1 0.109 0.247 0.212
主次因素 振幅＞振频＞振动时间

Table 3

Range analysis result of weight of adhesion on working face under circular arc vibration"

指标 振动时间/s 振幅/mm 振频/Hz
最优组合 10 35 4
y 21 1.342 1.445 1.432
y 22 1.390 1.401 1.437
y 23 1.353 1.239 1.215
R 2 0.047 0.206 0.217
主次因素 振频＞振幅＞振动时间

Table 4

Range analysis result of weight of adhesion on working face under jitter vibration"

指标 振动时间/s 振幅/mm 振频/Hz
最优组合 10 35 4
y 31 1.363 1.456 1.453
y 32 1.385 1.414 1.452
y 33 1.381 1.260 1.224
R 3 0.022 0.196 0.229
主次因素 振频＞振幅＞振动时间
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