旋转多臂变速运动规律建模及其对开口机构传动影响

doi:10.13475/j.fzxb.20181203707

纺织学报 ›› 2019, Vol. 40 ›› Issue (12): 127-133.doi: 10.13475/j.fzxb.20181203707

旋转多臂变速运动规律建模及其对开口机构传动影响

袁汝旺¹^,²(), 祝雷雷¹^,², 吕雪奎³, 杨佳敏³

1.天津工业大学机械工程学院, 天津 300387
2.天津工业大学天津市现代机电装备技术重点实验室, 天津 300387
3.江苏金龙科技股份有限公司, 江苏苏州 215500

收稿日期:2018-12-17 修回日期:2019-08-13 出版日期:2019-12-15 发布日期:2019-12-18
作者简介:袁汝旺(1979—),男,讲师,博士。主要研究方向为纺织机械设计与机构学。E-mail:yuanruwang@tjpu.edu.cn。
基金资助:
天津市自然科学基金项目(18JCYBJC20200)

Modeling of rotary shifting motion characteristics of electronic dobby and influence thereof on shedding mechanisms driving

YUAN Ruwang¹^,²(), ZHU Leilei¹^,², LÜ Xuekui³, YANG Jiamin³

1. School of Mechanical Engineering, Tiangong University, Tianjin 300387, China
2. Tianjin Key Laboratory of Advanced Mechatronics Equipment Technology, Tiangong University, Tianjin 300387, China
3. Jiangsu Jinlong Technology Co., Ltd., Suzhou, Jiangsu 215500, China

Received:2018-12-17 Revised:2019-08-13 Online:2019-12-15 Published:2019-12-18

摘要/Abstract

摘要：

针对电子多臂开口对不同织造工艺的适应性问题,分析旋转变速机构构型及其运动特性,从运动合成角度提出基于固定凸轮-滑块的旋转变速机构运动学分析与设计方法,建立适于产品系列化设计的旋转变速疏密化正弦运动规律模型及其相对运动传动模型,探讨连杆参数变化对机构性能与开口工艺的影响。结果表明:转子臂与偏心连杆相对运动为近似等角速比传动,提综臂运动特征值由0.000开始连续变化无突变;随疏密化调节系数增加,凸轮廓线、压力角、曲率半径、提综臂运动特征值及其相对主轴静止时间均减小;合理选择疏密化调节系数获得加速度或扭矩最优运动规律,可满足不同织造工艺需求,并为电子多臂机系列化设计提供理论基础与技术参考。

关键词: 电子多臂机, 旋转变速运动规律, 开口机构, 疏密化正弦规律

Abstract:

In order to address the adaptability of electronic dobby shedding to different weaving technologies, the construction and motion characteristics of the rotary shifting mechanism were analyzed. Methods for kinetically analyzing and designing the mechanism based on the fixed cam-slider combination were proposed, and a rotary shifting density sinusoidal motion curve model and a relative motion transmission model were established to facilitate the serialized design of the products. Then the influence of the changes in the linkage parameters on the performance of the rotary shifting mechanism and the workmanship of the shedding was investigated. The results show that the relative motion between the rotator arm and the eccentric link can be approximated as the constant angular speed ratio transmission, where the jacklever's motion eigenvalue starts from 0.000 and changes continuously along with the density adjustment coefficient without abrupt changes. The cam contour, pressure angle, curvature radius, the motion eigenvalue of the jacklever and its time of relative stillness to the main shaft are all reduced. A proper selection of the density adjustment coefficient can facilitate achieving an optimal pattern of the changing acceleration speed or torque to meet the needs of different weaving technologies, thereby laying a theoretical groundwork and providing a technical reference to the serialized design of electronic dobby.

Key words: electronic dobby machine, rotary shifting motion characteristic, shedding mechanism, density sinusoidal motion curve

中图分类号:

TS1031

袁汝旺, 祝雷雷, 吕雪奎, 杨佳敏. 旋转多臂变速运动规律建模及其对开口机构传动影响[J]. 纺织学报, 2019, 40(12): 127-133.

YUAN Ruwang, ZHU Leilei, LÜ Xuekui, YANG Jiamin. Modeling of rotary shifting motion characteristics of electronic dobby and influence thereof on shedding mechanisms driving[J]. Journal of Textile Research, 2019, 40(12): 127-133.

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l₁/mm	l₂/mm	l'₄/mm	l₅/mm	l₆/mm	ψ/rad
116.000	57.717	20.000	165.000	95.000	1.903 2
φ₁₀/rad	φ₂₀/rad	φ₄₀/rad	∠EOC'/rad	X/mm	Y/mm
π/2	3.760 8	π/2	0.724 5	185.100	39.850

b	V_m	A_m	T_m
0.000	2.000 0	6.283 2	8.162 2
0.134	1.763 7	5.888 0	5.772 4
0.410	1.418 4	7.384 0	4.194 7
0.500	1.333 3	8.753 4	4.299 3

l₄/mm	λ_max	λ_min	Δλ=λ_max-λ_min	\|λ_max-1\|	\|λ_min-1\|
56	0.933	0.740	0.193	0.067	0.260
58	1.000	0.779	0.221	0.00	0.221
60	1.071	0.819	0.252	0.071	0.181

b值	最大极径/mm	最大压力角/(°)	最小曲率半径/mm
0.000	88.244	45.24	27.942
0.134	86.143	40.56	25.227
0.410	80.578	30.55	14.801

阈值m	角位移/ (°)	相对织机主轴静止转角/(°)
阈值m	角位移/ (°)	0.000	0.134	0.410
1.000	24.06	154	142	112
0.990	23.78	176	164	132
0.975	23.49	192	188	148
0.950	22.86	204	202	162

旋转多臂变速运动规律建模及其对开口机构传动影响

Modeling of rotary shifting motion characteristics of electronic dobby and influence thereof on shedding mechanisms driving

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