CN1030509C

CN1030509C - Auxiliary nozzle used in jet loom

Info

Publication number: CN1030509C
Application number: CN92109163A
Authority: CN
Inventors: 石川洋彦
Original assignee: Toyoda Automatic Loom Works Ltd
Current assignee: Toyota Industries Corp
Priority date: 1992-08-04
Filing date: 1992-08-04
Publication date: 1995-12-13
Anticipated expiration: 2007-08-04
Also published as: CN1082637A

Abstract

The present invention relates to an auxiliary nozzle used in jet looms, which is used on jet looms which make abb fly by airflow. The abb is parallel arranged mutually at intervals along the direction of insertion wefts. The auxiliary nozzle used in jet looms is provided with a plurality of jet holes; generally the whole of the jet holes is distributed in a circle. The problem of no effective action on the abb exists from the upper end of the nozzle to far and jet flow diffusion of the central distance of the holes of the appearance. Therefore, in the present invention, the provided auxiliary nozzle used in jet looms configures the jet holes of the auxiliary nozzle into the holes of both ends in the horizontal direction of the nozzle. The central distance is longer than the central distance of the holes positioned on both of the two ends in the length direction of the nozzle. The present invention can increase the distribution of jet flows in the flying direction of the abb, and can enhance the flying force of the abb.

Description

Auxiliary nozzle used in jet loom

The invention relates to the pilot jet of used in jet loom, it is used in by air-flow and makes on the air-jet loom of weft yarn flight, and along the wefting insertion direction, several nozzles are each other across being set up in parallel, they respectively have a plurality of spray-holes, particularly about making the auxiliary nozzle used in jet loom of spray-hole high-efficient disposition.

There is the so-called shower formula nozzle of several spray-holes to compare in upper end with situations such as pilot jet with single hole near pilot jet, improved the aerojet characteristic, promptly owing to pressure change produces up and down, the spray angle variation of left and right directions is reduced is desirable, but has following point.

For example: special public clear 55-36735 communique, shown in the 6th figure to the 10 figure, pilot jet 1 ' on opened several spray-holes 2 ', and they are concentrated in together, integral body is done circular.Each spray-hole 2 ' make is the structure of angle α (with reference to the 7th figure), torsion angle β (with reference to the 8th figure) upwards, produce thus and give injection fluid with suitable flight effect weft yarn W, simultaneously, because of having improved aforementioned aerojet characteristic, just can be more suitable give and weft yarn flight effect.But, because the outward appearance bore dia becomes big, thus from nozzle 1 ' the upper end to outer view hole centre distance L ' (shown in the 6th figure), be increase tendency, so elongated to the distance of weft yarn W from the aerojet center.

Certainly, can make pilot jet 1 ' close weft yarn W, even seldom, and make it pilot jet 1 in nearer distance ' jet weft yarn is had an effect, but also be subjected to restriction with phase configuration such as weft yarn, flight guiders, even be in flight position state, can not make the injection stream effect near weft yarn W.This be because, if leave only 1～2mm of weft yarn, so correspondingly injection stream has just spread, flight forces reduces, and will strengthen injection stream in order to compensate, with regard to irrational amount of fluid consumed that increased.

As mentioned above, the purpose that the shower formula nozzle of several spray-holes is arranged is in order to improve the aerojet characteristic, but make the jet diffusion owing to strengthening to the distance of weft yarn from the injection center of this type of plural spray-hole, so exist jet invalid to the weft yarn effect, the result can not improve the problem of weft yarn flight forces.

The present invention is exactly in order to solve this class problem, its objective is provides pilot jet a kind of used in jet loom, improved the spray-hole arrangement on shower formula nozzle basis, it is based on such viewpoint: if increase the jet distribution that directive weft yarn heading is a weft direction, just can increase the weft yarn flight forces.

Nozzle structure therefore of the present invention is: the arrangement of the plural spray-hole of pilot jet, the hole centre distance at nozzle horizontal direction two ends is longer than the hole centre distance at the two ends that are in the nozzle length direction.

Also have in order to shorten the distance of several spray-hole self-injection centers to weft yarn, along with the shortening of two stomidium centre distances of aforesaid nozzle length direction, the configured in one piece that makes the total spray-hole is more near the upper end of nozzle.

Furtherly, for the same velocity flow profile that makes the jet that ejects from plural spray-hole becomes pancake along the wefting insertion direction of aforementioned weft yarn, just make the spray-hole configured in one piece become flat.

And, point to desirable same spray site in order to make plural spray-hole, give and the independent angle of each spray-hole oneself textural.

The pilot jet of said structure, its plural spray-hole be we can say the grow crosswise state of (flat) of integral body that is configured as, so, the outer view hole center of nozzle is near upper end of nozzle, thereby make jet act on weft yarn effectively, and the same velocity flow profile of jet is weft yarn heading or flat in the horizontal direction, be in the state that increases flight forces, make jet more effective the effect of weft yarn.

With reference to the accompanying drawings, further specify the present invention by description to the embodiment of the invention.

Fig. 1 is near the front elevation of the spray-hole configuration the expression pilot jet upper end;

Fig. 2 is the plane of expression stream band distribution;

Fig. 3 is the side view of the 2nd figure;

Fig. 4 is the front elevation of the pilot jet of other embodiment of expression near the configuration of upper end spray-hole;

Fig. 5 is the side cut away view of Fig. 4;

Fig. 6 is a front elevation of representing the spray orifice of pilot jet close upper end configuration in the past;

Fig. 7 is the side cut away view of Fig. 6;

Fig. 8 is the section plan of Fig. 6;

Fig. 9 is the plane of the velocity flow profile state of presentation graphs 6;

Figure 10 is the side view of Fig. 9.

Describe the embodiment that the present invention is specialized in detail with Fig. 1 to Fig. 3 below.

Several air injection type pilot jets 1 of the present invention are set up in parallel along wefting insertion direction space.In the upper end of each pilot jet several spray-holes 2 are arranged, integral body is flat form is arranging, and as shown in Figure 1, the nozzle length direction is made as the Y direction that is:, and horizontal direction is made as directions X.So, being configured to of hole: be positioned at the centre distance x of two stomidiums 2 of directions X, than the centre distance y length of two stomidiums 2 that are positioned at the Y direction.In addition, for the injection center of shortening plural spray-hole distance,, make whole plural spray-holes configurations more near upper end of nozzle along with the shortening of nozzle length direction two stomidium centre distances to weft yarn.Therefore, when configuration as shown in Figure 6 when pilot jet had the spray-hole of same perforated area in the past, because plural spray-hole is flat, configuration, can make spray-hole more close upper end configuration, its result, can make from nozzle 1 upper end to outside the distance L at view hole center than the distance L ' weak point of nozzle in the past shown in Figure 6.

Because the change of weaving conditions such as the rotating speed of loom, weft yarn kind, the compressed-air actuated pressure of supplying with pilot jet also should change, change according to this pressure, also change at Fig. 7 and upwards angle α, torsion angle β shown in Figure 8, but owing to be the jet rose structure, can make the variation of these angles very little, simultaneously, because distance L can reduce, make the injection center near weft yarn W, injection stream just acts on weft yarn when diffusion is little, so can utilize the energy of aerojet efficiently.In addition, because plural spray-hole horizontal direction hole centre distance x is big, all be the flat configuration, the result as shown in Figure 2, the same velocity flow profile of injection stream just becomes flat form, and it becomes the extension shape along the heading of weft yarn W, so, the distance of injection stream contact weft yarn is elongated, can improve flight forces.And whole in the past rounded configuration spray-holes, the velocity flow profile of injection stream becomes the chevron shape as Fig. 9 and Figure 10, thus particularly express on Fig. 9 like that, the part of contact weft yarn, the velocity flow profile of particularly impelling its flight impels flight insufficient at utmost point top.

And, according to the present invention, because in upper end (from the distance L of upper end) near nozzle 1, and plural spray-hole 2 is concentrated, so that the time that all spray-holes 2 enter in the weft yarn opening elongated, thus can be for a long time give with weft yarn W with the flight effect, become good state.

Pilot jet of the present invention not only is confined to the foregoing description.For example, as Fig. 4 and other embodiment shown in Figure 5, plural spray-hole 2 all is the flat configuration, simultaneously, points to desirable same point for making each spray-hole 2 on injection direction, preferably can make each spray-hole that independently angle [alpha] is arranged separately ₁, α ₂..., can make the air-spray diffusion littler thus.

As mentioned above, because the present invention can diminish the distance from the upper end of pilot jet to spray-hole configuration center (center of outer view hole),, can make the energy efficient of aerojet act on weft yarn so jet flow centre-to-centre spacing weft yarn is near; Be flat by same velocity flow profile again, broaden along the amplitude that contacts with weft yarn of weft yarn heading and can improve flight forces, furtherly, all form flat near the spray-hole on the nozzle, the wefting insertion time in the weft yarn opening can extend, and receives extraordinary effect.

Claims

1, a kind of auxiliary nozzle used in jet loom, along the wefting insertion direction of weft yarn, the space plural number is set up in parallel, and their each comfortable upper ends nearby are provided with plural spray-hole; It is characterized in that: the configuration of above-mentioned plural spray-hole is that the hole centre distance that is positioned at nozzle horizontal direction two ends is longer than the hole centre distance that is positioned at nozzle length direction two ends.

2, according to the auxiliary nozzle used in jet loom of putting down in writing in the claim 1, it is characterized in that: in order to shorten from the injection center of above-mentioned plural spray-hole to the distance of aforementioned weft yarn, along with the centre distance shortening of two stomidiums that are positioned at aforementioned nozzle length direction, the integral body of aforementioned plural spray-hole is configured in the upper end of more approaching nozzle.

3, according to the auxiliary nozzle used in jet loom of record in the claim 1, it is characterized in that:, make aforementioned plural spray-hole configured in one piece become flat for the same velocity flow profile that makes aforementioned plural spray-hole ejection jet becomes flat along the wefting insertion direction of above-mentioned weft yarn.

4, according to the auxiliary nozzle used in jet loom of record in the claim 1, it is characterized in that: aforementioned plural spray-hole, point to desirable same point for making their injection directions separately, give their angles independently separately.