Design and finite element analysis of the film stripping device for a spring-tooth residual film recovery machine

doi:10.3969/j.issn.1004-1524.20240465

Acta Agriculturae Zhejiangensis ›› 2026, Vol. 38 ›› Issue (4): 788-797.DOI: 10.3969/j.issn.1004-1524.20240465

• Biosystems Engineering • Previous Articles Next Articles

Design and finite element analysis of the film stripping device for a spring-tooth residual film recovery machine

TANG Kaibo¹^,²(), WANG Min¹^,^*(), LU Yongtao¹, YING Yukun¹, HE Yuze¹, WANG Jiliang¹, CAO Silin¹, TANG Zhikun¹^,², HUO Shang¹^,², LIU Peifeng¹^,², LU Chao¹^,²

¹ Institute of Mechanical Equipment, Xinjiang Academy of Agricultural and Reclamation Science, Shihezi 832000, Xinjiang, China
² College of Mechanical and Electrical Engineering, Shihezi University, Shihezi 832099, Xinjiang, China

Received:2024-05-26 Online:2026-04-25 Published:2026-05-08
Contact: WANG Min

Abstract

Abstract:

A scraper-type film stripping device was developed to tackle the problems of film leakage and unsatisfactory stripping performance in the operation of spring-tooth residual film recovery machines. The device is structurally composed of a scraper, a rotating shaft and other auxiliary mechanisms. By integrating the structural parameters of the machine frame and the operating principle of the film stripping device, its key structural parameters were determined via theoretical analysis and calculation, and the optimal operating rotational speed was obtained as 187 r·min^-1. Modal analysis and transient dynamic analysis were performed on the device using ANSYS software. The first order to the sixth order mode shapes were acquired through modal analysis, and the results demonstrate that the minimum natural frequency of the film stripping plate is 6.22 Hz, which exceeds the frequency generated by external periodic loads, thereby avoiding resonance failure. The transient dynamic analysis results show that the total deformation of the film stripping plate is 3.32×10^-2 m, and its maximum equivalent stress is 1.204 7×10^-1 MPa. Field experiments were implemented to test the operational performance of the film stripping device. The measured film stripping rate reached 87.88% and the film entanglement rate was 1.73%, which satisfy the operational specifications of agricultural film-stripping equipment. The proposed design features a simple structure and high reliability, which can reduce film leakage during stripping operations, and improve the stripping performance and operating efficiency of the device.

Key words: film stripping device, design, modal analysis, transient dynamic analysis

CLC Number:

S238

TANG Kaibo, WANG Min, LU Yongtao, YING Yukun, HE Yuze, WANG Jiliang, CAO Silin, TANG Zhikun, HUO Shang, LIU Peifeng, LU Chao. Design and finite element analysis of the film stripping device for a spring-tooth residual film recovery machine[J]. Acta Agriculturae Zhejiangensis, 2026, 38(4): 788-797.

Figures/Tables 12

Fig.1 Structure diagram of the spring-tooth type residual film recycling machine 1, Film picking device; 2, Film stripping device; 3, Spring teeth; 4, Rack.

Fig.2 Structure diagram of the film stripping device 1, Active sprocket; 2, Rotating shaft; 3, Film striping plate; 4, Reinforcing rib; 5, Bearing seat.

Fig.3 Schematic diagram of film stripping 1, Spring teeth; 2, Film striping plate; 3, Rotating shaft; 4, Residual film.

Fig.4 Distribution diagram of spring teeth shaft

Fig.5 Top view of the film stripping device 1, Rotating shaft; 2, Film striping plate; 3, Reinforcing rib; 4, Pressure plate.

Fig.6 Analysis of the force on the spring tooth

Fig.7 Structure diagram of film stripping roller

Fig.8 Force diagram of residual film 1, Residual film; 2, Stripping roller.

Fig.9 Mesh generation results

Fig.10 The first six mode shape diagrams of the first 6 steps of the film striping plate

Fig.11 Total deformation (left) and stress deformation (right) of transient dynamics

Table 1 Film stripping rate and film entanglement rate in field experiments Unit: %

编号 No.	脱膜率 Film stripping rate	缠膜率 Film entanglement rate
1	87.14	1.49
2	88.26	2.06
3	88.19	1.74
4	86.73	2.21
5	88.79	1.67
6	88.17	1.21
平均值Mean	87.88	1.73

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Design and finite element analysis of the film stripping device for a spring-tooth residual film recovery machine

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