Journal of Textile Research ›› 2024, Vol. 45 ›› Issue (11): 199-206.doi: 10.13475/j.fzxb.20231006101

• Machinery & Equipment • Previous Articles     Next Articles

Design of cooked cocoon conveying device based on cocoon feeding trolley

LOU Hao1, LÜ Wangyang1,2, CHEN Wenxing2, JIANG Wenbin1,2()   

  1. 1. College of Textile Science and Engineering (International Institute of Silk), Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
    2. National and Local Joint Engineering Laboratory of Textile Fiber Materials and Processing Technology, Hangzhou, Zhejiang 310018, China
  • Received:2023-10-17 Revised:2024-05-26 Online:2024-11-15 Published:2024-12-30
  • Contact: JIANG Wenbin E-mail:hfjjwb@163.com

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Abstract:

Objective In recent years, the development of China's cocoon and silk industry has stagnated due to the lack of production equipment. In the process of raw silk processing, some problems exists, such as low degree of automation, high labor cost, untimely delivery of cocoons and unbalanced distribution in the transportation of cooked cocoons. Therefore, it is important to develop a device that can replace manual labor to facilitate automatic conveying of cooked cocoons.

Method In order to solve the conveying problem of cooked cocoons and improve the production efficiency, an automatic conveying device for cooked cocoons was designed. By analyzing the convenional cocoon feeding method, the necessary conditions of the cocoon feeding process were obtained and analyzed. According to the theory of mechanical principles, the mechanism and device to replace the manual cocoon feeding action were designed. The feasibility and structural parameters of the device were determined by calculation and analysis.

Results The automatic conveying device of cooked cocoon was mainly composed of cocoon feeding trolleys, sliding contact line, a fixed track, columns and side frames. The communication between the components of the device and the operation of the control device were carried out by programmable logic controller (PLC) controller. A conveying device with a set of PLC controller, equipped with N cocoon cart, together for 6 groups of automatic silk reeling machine was responsible for supplying cooked cocoon. According to the production process of the silk reeling workshop and the structural characteristics of the automatic conveying device, the operation flow of the automatic conveying device was formulated, including the operation logic of the cocoon feeding trolley. By comparing different power supply modes and transmission modes, the sliding contact line was selected as the power supply mode of the cocoon feeding trolley, and a motor was used as the driving part of the cocoon feeding trolley. The cocoon feeding trolley was mainly composed of a positioning mechanism, a collector driving mechanism, a running mechanism, a tipping bucket mechanism and a single-chip microcomputer controller. The parameters of the running mechanism of the cocoon feeding trolley were determined by calculation, and the functions of independent on-orbit operation, automatic loading and unloading of cooked cocoons and communication of the cocoon feeding trolley were realized. Finite element analysis of the stiffness and strength of the fixed track was carried out using ANSYS, and the stiffness and strength of the track were verified to be within the safe range.

Conclusion The structure design of the automatic conveying device for cooked cocoon is proved reasonable. The design of the suspended track improves the utilization rate of the workshop space. The sliding contact line mobile power supply device can realize the whole process of continuous power supply for the cocoon cart. The design of the running mechanism of the polyamide fiber friction wheel improves the mobility of the cocoon cart. The structural design of the track reduces the length of the contact line between the polyamide fiber friction wheel and the track, and reduces the wear caused by the speed difference between the inside and outside of the polyamide fiber friction wheel during operation. The design of the positioning mechanism of the cocoon feeding trolley ensures the safety and stability of the cocoon feeding trolley running on the track. The cocoon feeding trolley can replace 6 cocoon feeding workers, thus improving production efficiency and reducing costs. Compared with the conventional way of sending cocoons, the automatic conveying device of cooked cocoons effectively solves the problems of untimely supply of cooked cocoons in the head position of automatic silk reeling machine and unbalanced distribution of cooked cocoons in different positions, and realizes the on-demand distribution and timely supply of cooked cocoons.

Key words: sliding contact line, mobile power supply, cook cocoon, friction drive, silk reeling, cocoon feeding trolley

CLC Number: 

  • TS142.3

Fig.1

Preparation schematic diagram of cooked cocoon conveying device"

Fig.2

Track structure"

Fig.3

Speed difference of gear train at track turning"

Fig.4

Operation principle diagram of conveying device"

Tab.1

Characteristics of different power supply modes"

驱动方式 供能时效/h 噪声 寿命/a 成本 污染
铅酸蓄电池供电 6~8 无 3~6 一般 有
钛酸锂电池供电 8~12 无 8~10 高 有
镉镍蓄电池供电 5~8 无 15~20 较高 有
滑触线供电 持续 无 50 低 无
链传动 — 有 2 高 无
带传动 — 有 3~10 高 无
齿轮传动 — 有 2 高 无
电动机 — 无 10~15 低 无

Fig.5

Sliding contact line structure"

Fig.6

Cocoon feeding trolley structure.(a)Front view; (b)Right view; (c)Steel frame engineering drawing; (d)Cocoon feeding trolley working condition"

Fig.7

Operating mechanisms. (a)Drive mechanism; (b)Mode of operation; (c)Friction wheel structure; (d)Friction wheel installation method"

Tab.2

Transmission gear parameters of running mechanism"

类型 模数
m		 齿数
z		 压力角
α/(°)		 分度圆直
径d/mm
主动齿轮 2.5 22 20 55
从动齿轮 2.5 28 20 70

Fig.8

Collector drive frame"

Fig.9

Simplified diagram of track load"

Fig.10

Track digital model pre-processing"

Fig.11

Multi-step loading sequence"

Tab.3

Stress and deflection changes of track"

时间/
s		 最小应力/
MPa		 最大应力/
MPa		 最小挠度/
mm		 最大挠度/
mm
1 7.53×10-4 147.31 0 582.36×10-3
2 9.69×10-4 147.33 0 582.42×10-3
3 1.08×10-3 147.33 0 582.48×10-3
4 1.71×10-3 147.33 0 582.51×10-3
5 9.40×10-4 147.31 0 582.53×10-3
6 9.40×10-4 147.31 0 582.53×10-3
7 1.71×10-3 147.33 0 582.51×10-3
8 1.08×10-3 147.33 0 582.48×10-3
9 9.69×10-4 147.33 0 582.42×10-3
10 7.53×10-4 147.31 0 582.36×10-3

Fig.12

Bending stress nephogram"

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