旋流纺纤维气流引导装置的设计
摘要
旋流纺纱是在利用喷射气流加工纤维的技术、并针对克服喷气纺纱方法所存在问题的基础上发明的一种新型纺纱方法。它以梳辊牵伸机构代替喷气纺纱中的罗拉牵伸机构,具有牵伸速度快、效率高,牵伸部件磨损小等优点。
本文在大量前期实验和理论分析的基础上,重新设计了闭合式旋流纺的纺纱工艺流程,设计了压辊、纤维引导管道和纤维气流引导装置,将纤维集聚装置汇聚好的纤维引导出来。
纤维气流引导装置内部流场的速度和压强分布状态决定了涤纶长丝和纤维在纱道内的运动状态,对纤维的引导至关重要。本文应用流体计算软件ANSYS CFX对纤维气流引导装置内气流流动特征进行三维数值模拟,根据计算结果对其内部的气流速度和压强分布进行分析;并选择喷射孔出口速度和喷射孔倾角作为研究参数,考察它们对纤维气流引导装置内气流流动特征的影响。最终得出如下结论:
1、纤维气流引导装置与纤维引导管道和压辊配合,可以较好地将汇聚后的纤维引出闭合式纤维集聚装置。
2、压缩空气经过喷射孔后在纤维气流引导装置内部形成旋转气流,向纱道出口螺旋推进。
3、切向速度沿纤维气流引导装置纱道的轴向与径向存在差异,会造成涤纶长丝上的捻度不匀,对引导纤维不利。
4、轴向速度在靠近管壁处较大,对包缠纤维的自由端可以起牵伸作用;同时容易引起涤纶长丝和纤维与壁面碰撞,造成引出的纤维的伸直平行度恶化。
5、径向速度较小,波动较大,这有利于包缠纤维的边缘自由尾端在气流作用下膨胀,从而使纤维在切向气流作用下获得更多的包缠捻度。
6、随着喷射孔倾角的增大,纤维气流引导装置纱道进气端的负压减小,不利于吸入纤维和涤纶长丝;对应截面内的最大切向速度随着增大,对涤纶长丝的旋转加捻增强。当纤维气流引导装置的喷射孔倾角为45°时,对纤维的引导较为有利。
7、喷射孔出口速度增大,切向速度和轴向速度随之增大,纤维气流引导装置纱道进气端的负压也越大。
Swirl spinning is a new-type spinning process. It uses jet air to process fibers in order to resolve the matters in air-jet spinning. It substitutes roller drafting system with combing roller drafting system, which ensures the drafting system of swirl spinning with high speed, high efficiency, little abrasion, and so on.
On the basis of large former experiment and theoretical analysis, loading roller, fiber guiding pipe and fiber-guiding device were designed and the closed swirl spinning process was improved.
The flow field’s distribution of fiber-guiding device are very important for guilding fiber. A three-dimensional computational fluid dynamics model was developed to simulate the flow field inside the fiber-guiding device with ANSYS CFX. Flowing state, distributing of static pressure and velocity and so on were characterized and analyzed.Finally, results were got as follows:
1. Fiber-guiding device working with fiber guiding passage and loading roller can well guild the converged fiber.
2. Compressive air through the jet orifice comes into being three-dimensional whirly airflow.
3. The reason of twist irregularity of filament is that the tangential velocity at different position is different.
4. The axial velocity near the wall is larger,which can draft to the free end wrapped fibers;At the same time it also easily leads to collision among polyester filament yarn, fiber and the wall,and leads to deteriorate of the straight parallel for derived fibers.
5. The radial velocity is small and volatile.It makes the edge open-trail end fibers in the main nozzle begin to expand to let filament get more wrapper fibers.
6. The negative pressure in the inlet decreases with increasing the jet orifice angle.The tangential velocity increases along with increasing the jet orifice angle.It is better when jet orifice angle is 45 degree.
7. When the velocity at the exit of jet orifice enhances, the tangential velocity,the axial velocity and the negative pressure in the inlet are greater.
本文在大量前期实验和理论分析的基础上,重新设计了闭合式旋流纺的纺纱工艺流程,设计了压辊、纤维引导管道和纤维气流引导装置,将纤维集聚装置汇聚好的纤维引导出来。
纤维气流引导装置内部流场的速度和压强分布状态决定了涤纶长丝和纤维在纱道内的运动状态,对纤维的引导至关重要。本文应用流体计算软件ANSYS CFX对纤维气流引导装置内气流流动特征进行三维数值模拟,根据计算结果对其内部的气流速度和压强分布进行分析;并选择喷射孔出口速度和喷射孔倾角作为研究参数,考察它们对纤维气流引导装置内气流流动特征的影响。最终得出如下结论:
1、纤维气流引导装置与纤维引导管道和压辊配合,可以较好地将汇聚后的纤维引出闭合式纤维集聚装置。
2、压缩空气经过喷射孔后在纤维气流引导装置内部形成旋转气流,向纱道出口螺旋推进。
3、切向速度沿纤维气流引导装置纱道的轴向与径向存在差异,会造成涤纶长丝上的捻度不匀,对引导纤维不利。
4、轴向速度在靠近管壁处较大,对包缠纤维的自由端可以起牵伸作用;同时容易引起涤纶长丝和纤维与壁面碰撞,造成引出的纤维的伸直平行度恶化。
5、径向速度较小,波动较大,这有利于包缠纤维的边缘自由尾端在气流作用下膨胀,从而使纤维在切向气流作用下获得更多的包缠捻度。
6、随着喷射孔倾角的增大,纤维气流引导装置纱道进气端的负压减小,不利于吸入纤维和涤纶长丝;对应截面内的最大切向速度随着增大,对涤纶长丝的旋转加捻增强。当纤维气流引导装置的喷射孔倾角为45°时,对纤维的引导较为有利。
7、喷射孔出口速度增大,切向速度和轴向速度随之增大,纤维气流引导装置纱道进气端的负压也越大。
Swirl spinning is a new-type spinning process. It uses jet air to process fibers in order to resolve the matters in air-jet spinning. It substitutes roller drafting system with combing roller drafting system, which ensures the drafting system of swirl spinning with high speed, high efficiency, little abrasion, and so on.
On the basis of large former experiment and theoretical analysis, loading roller, fiber guiding pipe and fiber-guiding device were designed and the closed swirl spinning process was improved.
The flow field’s distribution of fiber-guiding device are very important for guilding fiber. A three-dimensional computational fluid dynamics model was developed to simulate the flow field inside the fiber-guiding device with ANSYS CFX. Flowing state, distributing of static pressure and velocity and so on were characterized and analyzed.Finally, results were got as follows:
1. Fiber-guiding device working with fiber guiding passage and loading roller can well guild the converged fiber.
2. Compressive air through the jet orifice comes into being three-dimensional whirly airflow.
3. The reason of twist irregularity of filament is that the tangential velocity at different position is different.
4. The axial velocity near the wall is larger,which can draft to the free end wrapped fibers;At the same time it also easily leads to collision among polyester filament yarn, fiber and the wall,and leads to deteriorate of the straight parallel for derived fibers.
5. The radial velocity is small and volatile.It makes the edge open-trail end fibers in the main nozzle begin to expand to let filament get more wrapper fibers.
6. The negative pressure in the inlet decreases with increasing the jet orifice angle.The tangential velocity increases along with increasing the jet orifice angle.It is better when jet orifice angle is 45 degree.
7. When the velocity at the exit of jet orifice enhances, the tangential velocity,the axial velocity and the negative pressure in the inlet are greater.
引文
1.朱立成.旋流纺闭合式纤维集聚机构的设计.江南大学硕士学位论文.2008
2.顾闻彦.圆盘式旋流纺纱机的工艺参数对纺纱质量的影响.江南大学硕士学位论文.2005
3.葛明桥,顾闻彦,袁敏发,等.圆盘式旋流纺纱方法[J].纺织学报,2005,26(2):92-94
4. Ge Mingqiao,Gu Wenyan,Yuan Minfa,etal.Disc swirl spinning: a novel approach [J].Indian Journal of Fibre & Textile Research,2007,32(6):179-183
5.顾闻彦,葛明桥,李永贵,等.圆盘式旋流纺的加捻气压对成纱的影响[J].纺织学报,2005,26(3):41-43
6.李永贵,庄建国,葛明桥.圆盘式旋流纺涤棉包芯纱的研究[J].上海纺织科技,2005,33(11):22-23
7.葛明桥,庄建国,李永贵,等.旋流纺输送管道形状和尺寸对成纱质量的影响[J].纺织学报,2006,27(10):84-88
8.顾闻彦,庄建国,葛明桥.圆盘式旋流纺输送管道流场与成纱质量的关系[J].纺织学报,2006,27(12):48-51
9.顾闻彦,朱立成,葛明桥.圆盘式旋流纺纱机输送管道的数值解析与设计[J].纺织学报,2008,29(12):87-91
10.朱立成,顾闻彦,葛明桥.旋流纺闭合式纤维集聚机构的设计[J].纺织学报,2008,29(6):105-108
11. Pouresfandiari F., Fushimi S.,Sakaguchi A.,Saito H.,Toriumi K.,Nishimatsu T. Spinning Conditions and Characteristics of Open-End Rotor Spun Hybrid Yarns. Textile Research Journal.72, No.1:61+,10 pages(Jan. 2002)
12. Wang J,Huang X.Parameters of Rotor Spun Slub Yarn.Textile Research Journal.72,No.1:12+,5 pages (Jan. 2002)
13.王善元主编.变形纱[M].上海:上海科学技术出版社,1992:348～388
14. MengHe Miao,etal.Air interlaced yarn structure and properties.Textile Res. J,1995,65(8):433～440
15. Brayshaw J.,Hill M.,Cuthbert S.The Impact of Draft Distribution on the Mass Evenness ofAir Jet Yarns. Textile Technology International.2000.31-35
16. Murata Vortex Spinning NO.851MVS. Textile Industry of Indian,2003,42(9)
17. G.Maylor. MVS Spinning: A New Spin on Textile Processing. Australian Cottongrower,2002,23(1)
18. W.N.Rozelle. Vortex Spinning Gains Strength in US textile. Textile World,1999,149(9),73-74
19.李桂华,陈葵阳,于修业.喷气纺纱与涡流纺纱的成纱机理及产品开发[J].纺织导报,2004(3):52-55
20.王善元,于修业.新型纺织纱线[M].东华大学出版社2007年8月第一版;84,123,125,137
21. Anon.New Spinning Technology Ready for Market Update. Textile Month,1996,(9),10-12
22. N.W.Rozelle. Spinning Meet Market Pressures. Textile World,1994, 144(12),41-48,79
23. P.Owen.Export Growth by World Leader. Thinking. Textile Month,1994,(11),7pages
24. Anon. Spinning Machinery Market in Recession. Textile Month,1993, (7),5-6
25. V.Colussi. A More Flexible Way to Open-end Spinning. International Textile Bulletin,2004,50(1),46-48
26. Anon.Future Concepts Merge with Present Reality. Textile Month,1992, (1),33-36
27. P.Artzt,T.Herter,H.Preininger.Possibilities of Direct Conditioning in Rotor Spinning. International Textile Bulletin-Yarn Forming,1990,36(3rdquarter),4-22
28. New-wave Thinking. Textile Month,1992,(1),33-36
29.杨端秀,唐雯.Autocoro360:转杯纺中的先驱[J].国外纺织技术.2004(10):34-35
30. S.Weider,Jie Fang,Xu-Chu Cai.High Performance Spinner R40. Textile Technology Overseas(China), Textile Month,2004(4),22-23
31.汤龙世等.BD-330型转杯纺纱机结构性能及纺纱工艺[J].棉纺织技术.2004,32(4):44-46
32.李裕斌等.新型BT903转杯纺纱机的性能与工艺质量分析[J].山东纺织科技. 2004,45(2):4-6
33.王义博等. BT902和BT903转杯纺纱机的性能及使用[J].棉纺织技术.2003,31(1):17-20
34.徐惠君.转杯纺纱技术的发展(一)[J].上海纺织科技,2006,34(12):28-29
35.葛明桥,王嘉华,陈嘉.旋流加捻器[P].中国专利:ZL一95209706.0,1996-10-9
36.葛明桥,家元良幸,田上秀一.インタ-レ-ス系の交络角度[J],日本纤维机械学会志,1998,51(9):175-181
37.葛明桥,家元良幸,田上秀一.インタ-レ-ス系の交络强度と构造の关系[J],日本纤维机械学会志,1998,51(10):193-198
38.葛明桥,家元良幸,田上秀一.インタ-レ-ス系の静的交络强度[J],日本纤维机械学会志,1999,52(7):51-56
39.葛明桥,李永贵.网络器内空气压力平衡点的研究[J],纺织学报,2002,23(4):24-25
40.中国纺织总会科技发展部标准处.棉纺织(一)A .见:中国纺织总会科技发展部标准处.纺织品标准汇编C.北京:中国标准出版社,1996.1-20.
41. RIGAS F,SKLAVOUNOS S.Experimentally validated 3-D simulationof shock waves generated by dense explosives inconfined complex geometries [J].Journal of Hazardous Materials,2005,121(1-3):23-30.
42.张雅,刘淑艳,保国.雷诺应力模型在三维湍流流场计算中的应用[J].空动力学报,2005,20(4):572-576
43. Nallasamy M.Turbulence models and their applications to the prediction of internal flows:a review.Computers and Fluids.1987,15(2):151-194
44. Sloan DG,Smith PJ.,Smoot LD.,Modeling of swirl in turbulent flow systems.Prog.Energy Comb.Sci.1986,12(3):163-250
45. Guo BY.,Langrish TAG.,Fletcher DF.Numerical Simulation of Unsteady Turbulent Flow in Axisymmetric Sudden Expansions ASME J.Fluids Eng.2001,123:574-587
46. Jochmann P.,Sinigersky A.,Hehle M.,Schafer O.,Koch R.,Bauer H.J.Numerrical Simulation of a precessing Vortex breakdown.int.J.Heat Fluid Flow.2006,27:192-203
47. Spall RE,Ashby BM.A numerical study of vortex breakdown in turbulent swirling flows.ASME J.Fluids Eng.2000;122(1):179-183
48. Bradshaw P.Effects of streamline curvature on turbulent flow.AGARDograph Report No.169,1973
49. Weber R.,Visser BW.,Boysan F.Assessment of turbulence modeling for engineering prediction of swirling vortices in the near burner zone.Int.J.Heat Flow 1990,11(3):225-235
50. Nagendra D.Numerical simulations of an isothermal confined swirling jet in a dump combustor .Retrieved,from the World Wide Wed:https://engineering.purdue.edu,2001
51.郁崇文,张文赓,喷气纺引导装置中气流场的分布规律[J].中国纺织大学学报,1996,22(4):47-57.
52.章友鹤,发展新型纺纱技术,是纺纱技术进步的必然趋势,浙江棉纺织通讯,2001,93 (8):11
2.顾闻彦.圆盘式旋流纺纱机的工艺参数对纺纱质量的影响.江南大学硕士学位论文.2005
3.葛明桥,顾闻彦,袁敏发,等.圆盘式旋流纺纱方法[J].纺织学报,2005,26(2):92-94
4. Ge Mingqiao,Gu Wenyan,Yuan Minfa,etal.Disc swirl spinning: a novel approach [J].Indian Journal of Fibre & Textile Research,2007,32(6):179-183
5.顾闻彦,葛明桥,李永贵,等.圆盘式旋流纺的加捻气压对成纱的影响[J].纺织学报,2005,26(3):41-43
6.李永贵,庄建国,葛明桥.圆盘式旋流纺涤棉包芯纱的研究[J].上海纺织科技,2005,33(11):22-23
7.葛明桥,庄建国,李永贵,等.旋流纺输送管道形状和尺寸对成纱质量的影响[J].纺织学报,2006,27(10):84-88
8.顾闻彦,庄建国,葛明桥.圆盘式旋流纺输送管道流场与成纱质量的关系[J].纺织学报,2006,27(12):48-51
9.顾闻彦,朱立成,葛明桥.圆盘式旋流纺纱机输送管道的数值解析与设计[J].纺织学报,2008,29(12):87-91
10.朱立成,顾闻彦,葛明桥.旋流纺闭合式纤维集聚机构的设计[J].纺织学报,2008,29(6):105-108
11. Pouresfandiari F., Fushimi S.,Sakaguchi A.,Saito H.,Toriumi K.,Nishimatsu T. Spinning Conditions and Characteristics of Open-End Rotor Spun Hybrid Yarns. Textile Research Journal.72, No.1:61+,10 pages(Jan. 2002)
12. Wang J,Huang X.Parameters of Rotor Spun Slub Yarn.Textile Research Journal.72,No.1:12+,5 pages (Jan. 2002)
13.王善元主编.变形纱[M].上海:上海科学技术出版社,1992:348～388
14. MengHe Miao,etal.Air interlaced yarn structure and properties.Textile Res. J,1995,65(8):433～440
15. Brayshaw J.,Hill M.,Cuthbert S.The Impact of Draft Distribution on the Mass Evenness ofAir Jet Yarns. Textile Technology International.2000.31-35
16. Murata Vortex Spinning NO.851MVS. Textile Industry of Indian,2003,42(9)
17. G.Maylor. MVS Spinning: A New Spin on Textile Processing. Australian Cottongrower,2002,23(1)
18. W.N.Rozelle. Vortex Spinning Gains Strength in US textile. Textile World,1999,149(9),73-74
19.李桂华,陈葵阳,于修业.喷气纺纱与涡流纺纱的成纱机理及产品开发[J].纺织导报,2004(3):52-55
20.王善元,于修业.新型纺织纱线[M].东华大学出版社2007年8月第一版;84,123,125,137
21. Anon.New Spinning Technology Ready for Market Update. Textile Month,1996,(9),10-12
22. N.W.Rozelle. Spinning Meet Market Pressures. Textile World,1994, 144(12),41-48,79
23. P.Owen.Export Growth by World Leader. Thinking. Textile Month,1994,(11),7pages
24. Anon. Spinning Machinery Market in Recession. Textile Month,1993, (7),5-6
25. V.Colussi. A More Flexible Way to Open-end Spinning. International Textile Bulletin,2004,50(1),46-48
26. Anon.Future Concepts Merge with Present Reality. Textile Month,1992, (1),33-36
27. P.Artzt,T.Herter,H.Preininger.Possibilities of Direct Conditioning in Rotor Spinning. International Textile Bulletin-Yarn Forming,1990,36(3rdquarter),4-22
28. New-wave Thinking. Textile Month,1992,(1),33-36
29.杨端秀,唐雯.Autocoro360:转杯纺中的先驱[J].国外纺织技术.2004(10):34-35
30. S.Weider,Jie Fang,Xu-Chu Cai.High Performance Spinner R40. Textile Technology Overseas(China), Textile Month,2004(4),22-23
31.汤龙世等.BD-330型转杯纺纱机结构性能及纺纱工艺[J].棉纺织技术.2004,32(4):44-46
32.李裕斌等.新型BT903转杯纺纱机的性能与工艺质量分析[J].山东纺织科技. 2004,45(2):4-6
33.王义博等. BT902和BT903转杯纺纱机的性能及使用[J].棉纺织技术.2003,31(1):17-20
34.徐惠君.转杯纺纱技术的发展(一)[J].上海纺织科技,2006,34(12):28-29
35.葛明桥,王嘉华,陈嘉.旋流加捻器[P].中国专利:ZL一95209706.0,1996-10-9
36.葛明桥,家元良幸,田上秀一.インタ-レ-ス系の交络角度[J],日本纤维机械学会志,1998,51(9):175-181
37.葛明桥,家元良幸,田上秀一.インタ-レ-ス系の交络强度と构造の关系[J],日本纤维机械学会志,1998,51(10):193-198
38.葛明桥,家元良幸,田上秀一.インタ-レ-ス系の静的交络强度[J],日本纤维机械学会志,1999,52(7):51-56
39.葛明桥,李永贵.网络器内空气压力平衡点的研究[J],纺织学报,2002,23(4):24-25
40.中国纺织总会科技发展部标准处.棉纺织(一)A .见:中国纺织总会科技发展部标准处.纺织品标准汇编C.北京:中国标准出版社,1996.1-20.
41. RIGAS F,SKLAVOUNOS S.Experimentally validated 3-D simulationof shock waves generated by dense explosives inconfined complex geometries [J].Journal of Hazardous Materials,2005,121(1-3):23-30.
42.张雅,刘淑艳,保国.雷诺应力模型在三维湍流流场计算中的应用[J].空动力学报,2005,20(4):572-576
43. Nallasamy M.Turbulence models and their applications to the prediction of internal flows:a review.Computers and Fluids.1987,15(2):151-194
44. Sloan DG,Smith PJ.,Smoot LD.,Modeling of swirl in turbulent flow systems.Prog.Energy Comb.Sci.1986,12(3):163-250
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