CN102409469B - Weft insertion apparatus in jet loom - Google Patents
Weft insertion apparatus in jet loom Download PDFInfo
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- CN102409469B CN102409469B CN201110270922.0A CN201110270922A CN102409469B CN 102409469 B CN102409469 B CN 102409469B CN 201110270922 A CN201110270922 A CN 201110270922A CN 102409469 B CN102409469 B CN 102409469B
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
- D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
- D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
- D03D47/3006—Construction of the nozzles
- D03D47/302—Auxiliary nozzles
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Abstract
本发明提供一种喷射织机中的引纬装置,其中引纬装置包括具有喷射孔(23)的引纬用辅助喷嘴(21),从所述喷射孔中喷射空气喷射以输送纬纱引导通道(14)中的纬纱(Y)。所述喷射孔(23)是锥形的,以便孔(23)的截面积朝向辅助喷嘴(21)的空气喷射方向减小。喷射孔(23)的锥形角(γ)与喷射孔(23)的加工偏向角(β)的比例(A),γ/β=A,具有由不等式(1)表示的关系:A≥A0 …(1),其中A0是在辅助喷嘴(21)的喷射压力从引纬用最大压力(Pmax)变化为引纬用最小压力(Pmin)时,喷射偏向角(δ)的变化范围(△δmax)变成0时的γ/β的值。
The invention provides a weft insertion device in a jet loom, wherein the weft insertion device comprises an auxiliary nozzle (21) for weft insertion with a spray hole (23) from which an air jet is injected to convey the weft thread guide channel ( 14) in the weft (Y). The injection hole (23) is tapered so that the cross-sectional area of the hole (23) decreases toward the air injection direction of the auxiliary nozzle (21). The ratio (A) of the taper angle (γ) of the injection hole (23) to the machining deflection angle (β) of the injection hole (23), γ/β=A, has a relationship expressed by the inequality (1): A≥A0 ...(1), where A0 is the variation range (△δmax ) becomes the value of γ/β when 0.
Description
技术领域 technical field
本发明涉及一种喷射织机中的引纬装置,其中所述引纬装置包括具有喷射孔的引纬用辅助喷嘴,从喷射孔中喷射空气以输送纬纱引导通道中的纬纱。 The present invention relates to a weft insertion device in a jet loom, wherein the weft insertion device includes an auxiliary nozzle for weft insertion having a spray hole from which air is sprayed to convey weft yarn in a weft yarn guide passage. the
背景技术 Background technique
如图9(a)、图9(b)和图9(c)所示类型的引纬用辅助喷嘴11的喷射孔111指向纬纱引导通道14,纬纱引导通道14由形成在变形筘12的筘齿13中的纬纱引导孔131的阵列形成。辅助喷嘴11处的喷射时刻与在纬纱引导通道14中穿行的纬纱Y的穿行时刻匹配。纬纱引导通道14中的纬纱Y通过来自喷射孔111的空气喷射作用输送到引纬端部。参考标记T为经纱。
The
在喷嘴中要被从喷射孔111喷射的空气的内部压力(即辅助喷嘴11内部的空气压力)如由图3的曲线图中的波形Np所示那样变化。
The internal pressure of the air to be injected from the
在日本特开专利公开号No.3-97939中公开的引纬用辅助喷嘴中,如图9(c)的喷射孔111所示的那样,喷嘴孔(喷射孔)是锥形的,以便孔的截面积朝着空气喷射的方向减小。
In the auxiliary nozzle for weft insertion disclosed in Japanese Laid-Open Patent Publication No. 3-97939, as shown in the
本申请的发明人进行了一项实验, 以便在公开在日本特开专利公开号No.3-97939中的锥形喷射孔111中顶角θ与加工偏向角ψ之间的关系表示为θ/2=1.3×ψ的情况下,观察当改变喷嘴的内部压力时喷射偏向角δ的变化。如图9(c)所示,加工偏向角ψ是当沿着变形筘12的延伸方向观察时引纬方向Lo与喷射孔111的轴线之间的角度,并且喷射偏向角δ是当沿着变形筘12的延伸方向观察时引纬方向Lo与空气喷射方向线C之间的角度。空气喷射方向线C是指示在空气喷射中喷射压力最大的方向的线。空气喷射方向线C不与喷射孔111的轴线112一致。如下面所述,空气喷射的方向C或者喷射偏向角δ根据喷嘴的内部压力变化。
The inventors of the present application conducted an experiment so that the relationship between the apex angle θ and the machining deflection angle ψ in the
为了测量空气喷射方向线C,例如使用在日本特开专利公开号No.9-176937中公开的用于测量空气喷射方向的测量设备。 To measure the air jet direction line C, for example, a measuring device for measuring the air jet direction disclosed in Japanese Laid-Open Patent Publication No. 9-176937 is used. the
图10是表示实验结果的曲线图。图10中的横坐标表示喷嘴的内部压力,并且纵坐标表示喷射偏向角δ的变化△δ。截头圆锥形状的喷射孔111的轴线112是具有顶角θ的圆锥的轴线,其中圆锥通过延长截头圆锥的母线(侧线)来形成。在图10的曲线图中,喷嘴的内部压力为Pmax时的喷射偏向角δ表示为纵坐标处的0°。曲线△δ表示喷射偏向角δ相对于喷嘴内部压力变化的变化,即,当喷嘴内部压力从Pmax下降时,喷射偏向角δ如何基于Pmax变化。如从曲线△δ显而易见的,当喷嘴内部压力是引纬用最小压力Pmin时,喷射偏向角δ沿着负方向变化(即,空气喷射远离筘移动的方向)。
Fig. 10 is a graph showing experimental results. The abscissa in FIG. 10 represents the internal pressure of the nozzle, and the ordinate represents the change Δδ of the injection deflection angle δ. The
引纬用最小压力Pmin是指来自辅助喷嘴11的空气喷流以能够定义空气喷流中的空气喷射方向线C的方式到达纬纱引导通道14所需要的最小压力。在小于最小压力Pmin的压力处,来自辅助喷嘴11的空气喷射在到达纬纱引导通道14之前扩散,从而不能对纬纱Y提供有效的牵引力。
The minimum pressure Pmin for weft insertion refers to the minimum pressure required for the air jet from the
根据图10的曲线图,当喷嘴内部压力从最大压力Pmax下降到最小压力Pmin时,喷射偏向角δ沿着负方向变化。因此,空气喷射方向线C更可能从纬纱引导通道14向上偏离。当喷嘴内部压力的最大压力Pmax(或者供应空气到辅助喷嘴11的空气罐的压力)设定地较低以减少空气消耗时,减小了辅助喷嘴11的牵引力。因此,当在纬纱Y的末端通过辅助喷嘴11后完成从辅助喷嘴11的空气喷射时,喷射偏向角δ的变化△δ对纬纱Y的穿行位置的负面影响变得显著。
According to the graph of FIG. 10, when the nozzle internal pressure drops from the maximum pressure Pmax to the minimum pressure Pmin, the injection deflection angle δ changes in the negative direction. Therefore, the air jet direction line C is more likely to deviate upward from the
发明内容 Contents of the invention
本发明的目的是提供一种引纬用辅助喷嘴,即使当对辅助喷嘴供应空气的空气罐中的压力设定得较低以减少空气喷射强度时,也以高可靠性确保空气喷射方向保持在纬纱引导通道中。 The object of the present invention is to provide an auxiliary nozzle for weft insertion that ensures that the direction of the air injection is maintained at in the weft guide channel. the
根据本发明的一个方面,提供一种喷射织机中的引纬装置。引纬装置包括具有喷射孔23的引纬用辅助喷嘴21,从该喷射孔中喷射空气以输送纬纱引导通道14中的纬纱Y。喷射孔23是锥形的,以便孔23的截面积朝向辅助喷嘴21的空气喷射方向减小。喷射孔23的锥形角γ与喷射孔23的加工偏向角β的比例A,γ/β=A,具有由不等式(1)表示的关系:
According to one aspect of the present invention, a weft insertion device in a jet loom is provided. The weft insertion device includes an
A≥A0 …(1) A≥A0 ... (1)
其中A0是在辅助喷嘴21的喷射压力从引纬用最大压力(Pmax)变化为引纬用最小压力(Pmin)时,喷射偏向角(δ)的变化范围(△δmax)变成0时的γ/β的值。
where A0 is γ when the range of change (Δδmax) of the jet deflection angle (δ) becomes 0 when the jet pressure of the
在一个实施例中,比例A为2.5或更大。 In one embodiment, ratio A is 2.5 or greater. the
在另一个实施例中,比例A为3或更大。 In another embodiment, ratio A is 3 or greater. the
在又一个实施例中,比例A为4.5或更小。 In yet another embodiment, Ratio A is 4.5 or less. the
在再一个实施例中,喷射孔是截头圆锥的形状。 In yet another embodiment, the injection holes are frusto-conical in shape. the
当在本文中使用时,引纬用最大压力是指喷嘴内部压力的最大值。 As used herein, the maximum pressure for weft insertion refers to the maximum value of the internal pressure of the nozzle. the
引纬用最小压力是指来自辅助喷嘴的空气喷流以能够定义空气喷流中的空气喷射方向的方式到达纬纱引导通道所需要的最小压力。 The minimum pressure for weft insertion is the minimum pressure required for the air jet from the auxiliary nozzle to reach the weft guide channel in such a way that the direction of the air jet in the air jet can be defined. the
锥形角γ定义为喷射孔的母线与喷射孔的轴线之间的角。 The taper angle γ is defined as the angle between the generatrix of the injection hole and the axis of the injection hole. the
附图说明 Description of drawings
图1(a)为表示根据本发明的一个实施例的引纬用辅助喷嘴的一部分和变形筘的一部分的主视图; Figure 1 (a) is a front view showing a part of the auxiliary nozzle for weft insertion and a part of the deformed reed according to an embodiment of the present invention;
图1(b)为沿着线1b-1b剖开的图1(a)的剖视图; Fig. 1(b) is a sectional view of Fig. 1(a) taken along line 1b-1b;
图2(a)为辅助喷嘴的局部侧视图; Figure 2(a) is a partial side view of the auxiliary nozzle;
图2(b)为沿着线2b-2b剖开的图2(a)的剖视图;
Figure 2(b) is a cross-sectional view of Figure 2(a) taken along
图2(c)为沿着线2c-2c剖开的图2(b)的剖视图;
Figure 2(c) is a cross-sectional view of Figure 2(b) taken along
图3为表示喷嘴内部压力的变化的曲线图; Fig. 3 is a graph showing changes in pressure inside a nozzle;
图4为表示喷嘴内部压力与喷射仰角的变化之间的关系的曲线图; Fig. 4 is a graph showing the relationship between nozzle internal pressure and changes in jet elevation angle;
图5为表示喷嘴内部压力与喷射偏向角的变化之间的关系的曲线图; Fig. 5 is a graph showing the relationship between the nozzle internal pressure and the variation of the jet deflection angle;
图6为表示比例A与喷射仰角的变化范围之间的关系的曲线图; Fig. 6 is a graph showing the relationship between the ratio A and the variation range of the jet elevation angle;
图7为表示比例A与喷射偏向角的变化范围之间的关系的曲线图; Fig. 7 is a graph showing the relationship between the ratio A and the variation range of the injection deflection angle;
图8(a)为表示引纬用辅助喷嘴的一部分和变形筘的一部分的局部剖视图; Fig. 8(a) is a partial sectional view showing a part of the auxiliary nozzle for weft insertion and a part of the deformed reed;
图8(b)为假想平面上的交点的曲线图; Figure 8(b) is a graph of intersection points on an imaginary plane;
图9(a)为引纬装置的侧视图; Figure 9(a) is a side view of the weft insertion device;
图9(b)为图9(a)的局部侧视图; Figure 9(b) is a partial side view of Figure 9(a);
图9(c)为沿着线9c-9c剖开的图9(b)的剖视图;以及
Figure 9(c) is a cross-sectional view of Figure 9(b) taken along
图10为表示当比例A为1.3时喷射偏向角的变化的曲线图。 Fig. 10 is a graph showing changes in the injection deflection angle when the ratio A is 1.3.
具体实施方式 Detailed ways
将参考图1至图8描述本发明的实施例。包括引纬用辅助喷嘴的引纬装置的整体结构与图9中的结构相同。 An embodiment of the present invention will be described with reference to FIGS. 1 to 8 . The overall structure of the weft insertion device including the auxiliary nozzle for weft insertion is the same as that in FIG. 9 . the
图1(a)为引纬用辅助喷嘴21的一部分和变形筘12的一部分的主视图。图1(b)为沿着线1b-1b剖开的图1(a)的剖视图。图2(a)为辅助喷嘴21的末端的侧视图。当沿着引纬方向Lo观察时,辅助喷嘴21的末端是圆形或弓形的。图2(b)为沿着线2b-2b剖开的图2(a)的剖视图。图2(c)为沿着线2c-2c剖开的图2(b)的剖视图。
FIG. 1( a ) is a front view of a part of the
在图中提供了单个辅助喷嘴21。然而,如本领域的技术人员认识到的那样,在纬纱装置中,每个辅助喷嘴21可以针对每特定数量的筘齿13定位。
A single
如图2(b)所示,引纬用辅助喷嘴21是管状的并且辅助喷嘴21的末端是封闭的。辅助喷嘴21的末端部变得更小,以便辅助喷嘴21沿着引纬方向Lo的宽度向上变得更小。在辅助喷嘴21的末端部形成有板状的平坦部22。平坦部22的外表面221稍微向上朝向以面向引纬方向Lo。外表面221与每个经纱T延伸的方向平行。
As shown in FIG. 2( b ), the
如图2(b)和图2(c)所示,平坦部22包括与辅助喷嘴21中的空气供应通道211连通的喷射孔23。喷射孔23构造为锥形,其中孔的截面积朝着空气喷射的方向减小。也就是说,喷射孔23是截头圆锥形的孔。圆锥通过延长喷射孔23的截头圆锥的母线(侧线)来形成,并且圆锥(或者喷射孔23)的轴线231相对于参考线L1倾斜,该参考线L1垂直于管状的辅助喷嘴21的轴线212。
As shown in FIGS. 2( b ) and 2 ( c ), the
如图2(b)所示,参考线L1与轴线231之间的角度定义为当沿着织机的前后方向并且与变形筘12(见图9(a))的延伸方向垂直的方向观察时的加工仰角α。轴线231稍微向上朝向。从喷射孔23实际喷射的空气的喷射方向与轴线231不一致。因此,喷射仰角ε与加工仰角α不一致。
As shown in Fig. 2(b), the angle between the reference line L1 and the
如图2(c)所示,加工偏向角β定义为引纬方向Lo(在附图中从左到右的方向,如沿着图9的引纬方向)与轴线231之间的角度。与加工仰角α和喷射仰角ε之间的关系相似,喷射偏向角δ与加工偏向角β不一致。
As shown in FIG. 2( c ), the machining deflection angle β is defined as the angle between the weft insertion direction Lo (the direction from left to right in the drawing, such as along the weft insertion direction in FIG. 9 ) and the
通过延长喷射孔23的截头圆锥的母线(侧线)而形成的圆锥的锥形角定义为圆锥的母线与轴线231之间的角度γ。
The taper angle of the cone formed by extending the generatrix (side line) of the truncated cone of the
在该实施例中,比例A即γ/β的值被设定为3.6。图4的曲线图中的曲线E0表示当比例A为3.6时喷射仰角ε相对于喷嘴内部压力变化的变化△ε。如图2(b)所示,喷射仰角ε是当沿着引纬方向Lo观察时空气喷射方向线C与参考线L1之间的角度。为了测量空气喷射方向线C,例如使用如在日本特开专利公开号No.9-176937中公开的用于测量空气喷射方向的测量设备。 In this embodiment, the ratio A, ie, the value of γ/β is set to 3.6. A curve E0 in the graph of FIG. 4 represents a change Δε of the injection elevation angle ε with respect to a change in the pressure inside the nozzle when the ratio A is 3.6. As shown in Fig. 2(b), the jet elevation angle ε is the angle between the air jet direction line C and the reference line L1 when viewed along the weft insertion direction Lo. To measure the air jetting direction line C, for example, a measuring device for measuring the air jetting direction as disclosed in Japanese Laid-Open Patent Publication No. 9-176937 is used. the
曲线E1表示当比例A为1.3时喷射仰角ε相对于喷嘴内部压力变化的变化△ε。横坐标表示喷嘴内部压力,而纵坐标表示喷射仰角ε的变化△ε。在该曲线图中,在喷嘴内部压力为Pmax时的喷射仰角表示为纵坐标处的0°。喷射仰角ε的正变化△ε>0是当喷嘴内部压力为最大压力Pmax时喷射仰角比空气喷射方向线C更加向上指向的情况。 Curve E1 represents the change Δε of the injection elevation angle ε with respect to the change in the pressure inside the nozzle when the ratio A is 1.3. The abscissa indicates the pressure inside the nozzle, and the ordinate indicates the change Δε of the jet elevation angle ε. In this graph, the injection elevation angle at the nozzle internal pressure Pmax is represented as 0° on the ordinate. A positive change of the injection elevation angle ε Δε>0 is a case where the injection elevation angle is directed more upward than the air injection direction line C when the nozzle internal pressure is the maximum pressure Pmax. the
如从曲线E0与曲线E1之间的比较而显而易见的,喷射仰角ε的正变化△ε>0在比例A为3.6时比当比例A为1.3时更小。也就是说,空气喷射方向线C从喷嘴内部压力为最大压力Pmax的情况向上变化的幅度在比例A为3.6时比在比例A为1.3时更小。这就意味着3.6的比例A比1.3的比例A优选,以阻止空气喷射方向线C从纬纱引导通道14向上偏离。
As is apparent from the comparison between the curve E0 and the curve E1, the positive change Δε>0 of the injection elevation angle ε is smaller when the ratio A is 3.6 than when the ratio A is 1.3. That is, the range in which the air injection direction line C changes upward from the case where the nozzle internal pressure is the maximum pressure Pmax is smaller when the ratio A is 3.6 than when the ratio A is 1.3. This means that a ratio A of 3.6 is preferred over a ratio A of 1.3 in order to prevent the upward deviation of the air jet direction line C from the
图5的曲线图中的曲线Do是当比例A为3.6时空气喷射的喷射偏向角δ相对于喷嘴内部压力变化的变化△δ。喷射偏向角δ是当沿着变形筘12(见图9(a))的延伸方向观察时如图2(c)中所示的空气喷射方向线C与引纬方向Lo之间的角度。曲线D1是当比例A为1.3时喷射偏向角δ相对于喷嘴内部压力变化的变化△δ。横坐标表示喷嘴内部压力,纵坐标表示喷射偏向角δ的变化△δ。 The curve Do in the graph of FIG. 5 is the change Δδ of the injection deflection angle δ of the air injection with respect to the change in the pressure inside the nozzle when the ratio A is 3.6. The jet deflection angle δ is the angle between the air jet direction line C shown in Fig. 2(c) and the weft insertion direction Lo when viewed along the extending direction of the deformed reed 12 (see Fig. 9(a)). Curve D1 is the change Δδ of the injection deflection angle δ with respect to the change of the pressure inside the nozzle when the ratio A is 1.3. The abscissa represents the internal pressure of the nozzle, and the ordinate represents the change Δδ of the jet deflection angle δ. the
在该曲线图中,喷嘴内部压力为Pmax时的喷射偏向角δ表示为纵坐标处的0°。喷射偏向角δ的正变化,即△δ>0,意味着空气喷射方向线C比当喷嘴内部压力为最大压力Pmax时更接近变形筘12。喷射偏向角δ的负变化,即△δ<0,意味着空气喷射方向线C比当喷嘴内部压力为最大压力Pmax时更远离变形筘12地移动。当喷射偏向角δ的负变化△δ<0更大时,空气喷射方向线C更大程度地移动远离变形筘12的纬纱引导通道14。
In this graph, the jet deflection angle δ when the nozzle internal pressure is Pmax is expressed as 0° at the ordinate. A positive change in the jet deflection angle δ, ie Δδ > 0, means that the air jet direction line C is closer to the
如从曲线D0与曲线D1之间的比较而显而易见的,喷射偏向角δ的变化△δ在比例A为3.6时总是正的,并且随着喷嘴内部压力变小,变化△δ的值变大。当比例A为1.3时,喷射偏向角δ的变化△δ在高压侧是正的,但在低压侧是负的。因为空气喷射方向线C是向上指向的,所以如果空气喷射方向线C移动远离变形筘12,则喷射偏向角δ的变化△δ更可能从纬纱引导通道14向上偏离。
As is apparent from the comparison between the curve D0 and the curve D1, the change Δδ of the injection deflection angle δ is always positive when the ratio A is 3.6, and the value of the change Δδ becomes larger as the nozzle internal pressure becomes smaller. When the ratio A is 1.3, the change Δδ of the injection deflection angle δ is positive on the high pressure side but negative on the low pressure side. Since the air jet direction line C is directed upwards, the change Δδ of the jet deflection angle δ is more likely to deviate upward from the
图5的曲线图表示当喷嘴内部压力在低压侧时,空气喷射方向线C从纬纱引导通道14的偏离在比例A为3.6时比当比例A为1.3时更不可能发生。
The graph of FIG. 5 shows that when the nozzle internal pressure is on the low pressure side, the deviation of the air injection direction line C from the
图6的曲线图中的曲线Z表示喷射仰角ε相对于比例A的变化在最大压力Pmax和最小压力Pmin之间的变化范围△εmax。变化范围△εmax是当喷嘴内部压力从引纬用最大压力Pmax下降到引纬用最小压力Pmin时喷射仰角ε的变化。优选的是,将最小压力Pmin在能够利用如在日本特开专利公开号No.9-176937中公开的用于测量空气喷射方向的测量设备来测量空气喷射方向线C的范围内设定为尽可能低的压力。横坐标表示比例A,而纵坐标表示喷射仰角ε的变化范围△εmax。根据曲线Z,比例A越大,喷射仰角ε的变化范围△εmax就变得越小。这意味着更大值的比例A是更优选的,以阻止空气喷射方向线C从纬纱引导通道14向上偏离。
The curve Z in the graph of FIG. 6 represents the variation range Δεmax of the variation of the injection elevation angle ε with respect to the ratio A between the maximum pressure Pmax and the minimum pressure Pmin. The change range Δεmax is the change of the spray elevation angle ε when the internal pressure of the nozzle drops from the maximum pressure Pmax for weft insertion to the minimum pressure Pmin for weft insertion. It is preferable to set the minimum pressure Pmin as much as possible within a range capable of measuring the air jetting direction line C using a measuring device for measuring the air jetting direction as disclosed in Japanese Laid-Open Patent Publication No. 9-176937. Possibly low pressure. The abscissa indicates the ratio A, and the ordinate indicates the variation range Δεmax of the injection elevation angle ε. According to the curve Z, the larger the ratio A is, the smaller the variation range Δεmax of the injection elevation angle ε becomes. This means that a larger value of the ratio A is more preferred in order to prevent the air jet direction line C from deviating upwards from the
图7的曲线图中的曲线H表示喷射偏向角δ相对于比例A的变化的变化范围△δmax。变化范围△δmax是当喷嘴内部压力从引纬用最大压力Pmax下降到引纬用最小压力Pmin时喷射偏向角δ的变化。横坐标表示比例A,而纵坐标表示喷射偏向角δ的变化范围△δmax。喷射偏向角δ的正变化范围,即△δmax>0,意味着与当喷嘴内部压力为最大压力Pmax时的情况相比,空气喷射方向线C更接近变形筘12。喷射偏向角δ的负变化范围,即△δmax<0,意味着与当喷嘴内部压力为最大压力Pmax时的情况相比,空气喷射方向线C更远离变形筘12地移动。
Curve H in the graph of FIG. 7 represents the variation range Δδmax of the variation of the injection deflection angle δ with respect to the ratio A. In FIG. The change range Δδmax is the change of the jet deflection angle δ when the internal pressure of the nozzle drops from the maximum pressure Pmax for weft insertion to the minimum pressure Pmin for weft insertion. The abscissa indicates the ratio A, and the ordinate indicates the variation range Δδmax of the injection deflection angle δ. A positive change range of the jet deflection angle δ, ie, Δδmax>0, means that the air jet direction line C is closer to the
如从曲线H而显而易见的,当比例A为2或更小时,喷射偏向角δ的变化范围△δmax是负的。在比例A为2或更小的情况下,比例A越小,喷射偏向角δ的负变化范围(△δmax<0)就变得越大。随着喷射偏向角δ的负变化范围(△δmax<0)变大,空气喷射方向线C移动进一步远离变形筘12。因为空气喷射方向线C是面向上方的,所以如果空气喷射方向线C移动远离变形筘12,那么空气喷射方向线C更可能从纬纱引导通道14向上偏离。
As is apparent from the curve H, when the ratio A is 2 or less, the variation range Δδmax of the injection deflection angle δ is negative. In the case where the ratio A is 2 or less, the smaller the ratio A is, the larger the negative variation range (Δδmax<0) of the injection deflection angle δ becomes. As the negative variation range of the jet deflection angle δ (Δδmax<0) becomes larger, the air jet direction line C moves further away from the
如果将当喷嘴内部压力从最大压力Pmax变化为最小压力Pmin时喷射偏向角δ的变化范围△δmax变为0时的比例定义为A0,则当比例A为A0或者更大时,喷射偏向角δ的变化范围△δmax是正的。在比例A为A0或者更大的值的情况下,随着比例A更大,喷射偏向角△δ的正变化范围(δmax>0)变得更大。喷射偏向角△δ的正变化范围(δmax>0)表示与喷嘴内部压力为最大压力Pmax的情况相比,空气喷射方向线C更靠近变形筘12的情况。因为加工仰角α是面向上方的,所以随着空气喷射方向线C接近变形筘12,空气喷射方向线C变得更低。因此,随着空气喷射方向线C接近变形筘12,喷射仰角ε在向上方向的变化被抵消,以促进空气喷射方向线C在纬纱引导通道14中的定位。
If the ratio when the nozzle internal pressure is changed from the maximum pressure Pmax to the minimum pressure Pmin is defined as the ratio when the variation range Δδmax of the injection deflection angle δ becomes 0, then when the ratio A is A0 or greater, the injection deflection angle δ The variation range of △δmax is positive. In the case where the ratio A is a value of A0 or more, as the ratio A is larger, the range of positive variation (δmax>0) of the injection deflection angle Δδ becomes larger. The positive change range (δmax>0) of the jet deflection angle Δδ indicates that the air jet direction line C is closer to the
A0的值大于2但是小于2.5,在该实施例中,A0为2.2。如从图7显而易见的,当比例A>A0时,喷射偏向角δ的变化范围△δmax总是正的。因此,通过确定加工偏向角β和锥形角γ使得比例A等于或大于比例A0,使得即使当喷嘴内部压力变为最小压力Pmin时,喷射偏向角δ的变化范围△δmax也不会变负,从而促进空气喷射方向线C在纬纱引导通道14中的定位。
The value of A0 is greater than 2 but less than 2.5, in this embodiment, A0 is 2.2. As is apparent from FIG. 7, when the ratio A>A0, the variation range Δδmax of the injection deflection angle δ is always positive. Therefore, by determining the machining deflection angle β and the taper angle γ so that the ratio A is equal to or greater than the ratio A0, so that even when the nozzle internal pressure becomes the minimum pressure Pmin, the variation range Δδmax of the injection deflection angle δ does not become negative, The positioning of the air jet direction line C in the weft
当正变化范围(△δmax>0)更大时,空气喷射方向线C下降,并且促进了空气喷射方向线C在纬纱引导通道14中的定位。因此,当比例A为3时,与比例A为2.5的情况相比,空气喷射方向线C更容易定位在纬纱引导通道14中。
When the positive variation range (Δδmax>0) is larger, the air jetting direction line C is lowered, and the positioning of the air jetting direction line C in the
如果比例A超过3.6,那么正变化范围(△δmax>0)的增量变得更小。当比例A为4.5时,正变化范围△δmax>0几乎是稳定的。当加工偏向角β为常数时,比例A越小,锥形角γ越小。当锥形角γ越小时,更容易加工喷射孔23。因此,4.5或更小的比例A是期望的。
If the ratio A exceeds 3.6, the increment of the positive variation range (Δδmax>0) becomes smaller. When the ratio A is 4.5, the positive variation range Δδmax>0 is almost stable. When the processing deflection angle β is constant, the smaller the ratio A is, the smaller the taper angle γ is. When the taper angle γ is smaller, it is easier to process the
如图8(a)所示,与纬纱引导通道14的后壁面141同平面的假想平面142和从喷射孔111喷射的空气的空气喷射方向线C之间的交点定义为Cn。
As shown in FIG. 8( a ), the intersection point between an
图8(b)为表示在比例A为1.3、2、2.5、3以及的3.6情况下,当如图3的波形Np中所示的喷嘴内部压力从引纬用最大压力Pmax变化为引纬用最小压力Pmin时交点Cn的变化的曲线图。横坐标x表示引纬方向Lo,而纵坐标y表示向上方向。x-y坐标平面表示假想平面142。
Figure 8(b) shows that when the ratio A is 1.3, 2, 2.5, 3 and 3.6, when the internal pressure of the nozzle as shown in the waveform Np of Figure 3 changes from the maximum pressure Pmax for weft insertion to that for weft insertion The graph of the change of the intersection point Cn at the minimum pressure Pmin. The abscissa x indicates the weft insertion direction Lo, and the ordinate y indicates the upward direction. The x-y coordinate plane represents an
当喷嘴内部压力为最大压力Pmax时,在比例A为1.3、2、2.5、3以及3.6的情况下,交点Cn的位置变得几乎相同。因此,该交点共同表示为Co。 When the nozzle internal pressure is the maximum pressure Pmax, the position of the intersection point Cn becomes almost the same in the cases where the ratio A is 1.3, 2, 2.5, 3, and 3.6. Therefore, this point of intersection is collectively denoted Co. the
交点C0和C1是当比例A为1.3时交点的变化。交点C0和C2是当比例A为2时交点的变化。交点C0和C3是当比例A为2.5时交点的变化。交点C0和C4是当比例A为3时交点的变化。交点C0和C5是当比例A为3.6时交点的变化。 The intersection points C0 and C1 are the changes of the intersection point when the ratio A is 1.3. The points of intersection C0 and C2 are the changes in the point of intersection when the ratio A is 2. The intersections C0 and C3 are the changes in the intersection when the ratio A is 2.5. The intersection points C0 and C4 are the changes of the intersection points when the ratio A is 3. The intersections C0 and C5 are the changes in the intersection when the ratio A is 3.6. the
交点C0是当喷嘴内部压力为最大压力Pmax时的交点。交点C1、C2、C3、C4和C5是当喷嘴内部压力为最小压力Pmin时的交点。 The intersection point C0 is an intersection point when the pressure inside the nozzle is the maximum pressure Pmax. Intersection points C1, C2, C3, C4, and C5 are intersection points when the pressure inside the nozzle is the minimum pressure Pmin. the
当比例A为1.3时,交点C1从后壁面141向上偏离。
When the ratio A is 1.3, the intersection point C1 deviates upward from the
当比例A为2时,交点C2处于后壁面141的上缘143附近。
When the ratio A is 2, the intersection point C2 is near the upper edge 143 of the
当比例A为2.5时,交点C0和C3处于后壁面141内。
When the ratio A is 2.5, the intersection points C0 and C3 are within the
当比例A为3时,交点C0和C4处于后壁面141内。
When the ratio A is 3, the intersection points C0 and C4 are within the
当比例A为3.6时,交点C0和C5处于后壁面141内。
When the ratio A is 3.6, the intersection points C0 and C5 are within the
在交点Cn从后壁面141向上偏离的情况下,在纬纱Y的穿行位置上的负面影响变得显著,并且可能发生纬纱穿行速度的下降以及引纬失败。当比例A为2时,交点C2处于后壁面141的上缘143附近,而当比例A为2.5时,交点C3处于后壁面141内。也就是说,当比例A为2.5时,以高可靠性阻止交点Cn从后壁面141向上偏离。
In the case where the intersection point Cn deviates upward from the
当比例A为3时,交点C0和C4都定位在后壁面141内。因此,当比例A为3.0时,以更高的可靠性阻止交点Cn从后壁面141向上偏离。
When the ratio A is 3, both intersections C0 and C4 are located within the
当比例A为3时,交点C4定位在后壁面141的上缘143内侧。当比例A为3.6时,交点C5定位在比交点C4更靠内侧(或更低)。也就是说,当比例A为3.6时,以甚至更高的可靠性阻止交点Cn从后壁面141向上偏离。
When the ratio A is 3, the intersection point C4 is located inside the upper edge 143 of the
上述实施例具有下列的优点。 The above-described embodiment has the following advantages. the
(1)如图7所示,A0为在辅助喷嘴21处进行空气喷射时当喷嘴内部压力从最大压力Pmax变化为最小压力Pmin时,当喷射偏向角δ的变化范围△δmax变为0时的γ/β的值。A0的值大于2但是小于2.5。当比例A大于A0的值时,喷射偏向角δ的变化范围△δmax为正的。在变化范围△δmax为正的情况下,即使当在空气喷射端部处喷嘴内部压力从最大压力Pmax变化为最小压力Pmin时,空气喷射方向线C也接近变形筘12,并且由于图4中示出的喷射仰角ε的变化△ε的增加导致的影响被抵消。因此降低了空气喷射方向线C从纬纱引导通道14向上偏离的可能性。
(1) As shown in Figure 7, A0 is when the internal pressure of the nozzle changes from the maximum pressure Pmax to the minimum pressure Pmin when the air injection is performed at the
因此,满足比例A的不等式: Therefore, the inequality for the proportion A is satisfied:
γ/β= A ≥ A0 γ/β= A ≥ A0
的引纬用辅助喷嘴21降低了从喷射孔23喷射的空气的空气喷射方向线C由于喷嘴内部压力的下降而从纬纱引导通道14偏离的可能性。
The
(2)当比例A为2.5时的喷射偏向角δ的变化范围△δmax大于在 比例A为A0时的喷射偏向角δ的变化范围△δmax。辅助喷嘴21处的空气喷射完成时的喷嘴内部压力低于引纬用最小压力Pmin,空气喷射方向线C在该最小压力下是可测量的。当比例为A0时,当喷嘴内部压力变得低于最小压力Pmin时,喷射偏向角δ的变化范围△δmax可能变为负的。A为2.5或更大的构成促进空气喷射方向线C以高可靠性在纬纱引导通道14中的定位。
(2) The variation range Δδmax of the injection deflection angle δ when the ratio A is 2.5 is larger than the variation range Δδmax of the injection deflection angle δ when the ratio A is A0. The nozzle internal pressure at which the air injection at the
(3)当比例A为3时的喷射偏向角δ的变化范围△δmax大于在比例A为2.5的情况下的喷射偏向角δ的变化范围△δmax。因而,A为3或更大的构成促进空气喷射方向线C以更高的可靠性在纬纱引导通道14中的定位。
(3) The variation range Δδmax of the injection deflection angle δ when the ratio A is 3 is larger than the variation range Δδmax of the injection deflection angle δ when the ratio A is 2.5. Thus, the configuration in which A is 3 or more facilitates the positioning of the air jetting direction line C in the
(4)即使当比例A大于4.5时,正变化范围△δmax保持几乎稳定。通常,喷射孔23由电火花加工来形成。当加工偏向角β为常数时,比例A越小,锥形角γ越小。当锥形角γ越小时,越容易加工喷射孔23。因此,A为4.5或更小的构造有利于促进喷射孔23的加工。
(4) Even when the ratio A is larger than 4.5, the positive variation range Δδmax remains almost stable. Usually, the
本发明也可以实施在下面的实施例中。 The present invention can also be practiced in the following examples. the
喷射孔可以是截头椭圆锥的形状的孔。 The injection hole may be a hole in the shape of a frusto-elliptical cone. the
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Also Published As
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JP2012062604A (en) | 2012-03-29 |
JP5553443B2 (en) | 2014-07-16 |
EP2431507B1 (en) | 2012-10-03 |
CN102409469A (en) | 2012-04-11 |
EP2431507A1 (en) | 2012-03-21 |
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