CN104195727A - Main jet of air jet loom - Google Patents
Main jet of air jet loom Download PDFInfo
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- CN104195727A CN104195727A CN201410406062.2A CN201410406062A CN104195727A CN 104195727 A CN104195727 A CN 104195727A CN 201410406062 A CN201410406062 A CN 201410406062A CN 104195727 A CN104195727 A CN 104195727A
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- wefting insertion
- air
- yarn
- nozzle core
- flow path
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Abstract
The invention discloses a main jet of an air jet loom. The main jet comprises a jet body (10), a jet core (20) and a yarn guide tube (30), a jet core body (21) is provided with a wefting insertion flow channel area (210), and the wefting insertion flow channel area (210) comprises a conical cavity (211) and a thin and long round cavity (212). The main jet further comprises a wefting insertion composite member (23), the wefting insertion composite member (23) comprises a wefting insertion component (231) and a sealing piece (232), the wefting insertion component (231) is hollow and is arranged in the wefting insertion flow channel area (210), and the sealing piece (232) is located between the wall of the wefting insertion component (231) and the wall of the conical cavity (211). The inner diameter of a hollow cavity of the wefting insertion component can be manufactured according to the thickness of weft yarn so that the main jet can adapt to the weft yarn with different thicknesses.
Description
Technical field:
The present invention relates to air-jet loom, in particular to a kind of main burner of air-jet loom.
Background technology:
Air-jet loom is to adopt jet-stream wind weft traction to pass through the shuttleless loom of shed open, its operation principle is to utilize air as wefting insertion medium, with the compressed air stream ejecting, weft yarn being produced to frictional traction draws, weft yarn was treated to shed open, reached the object of wefting insertion by the jet of jet generation.In prior art, air-jet loom generally adopts main burner to add the filling insertion way of irregular box, the structure of main burner is mainly made up of nozzle body, nozzle core, taper sheath and yarn-guide tube, and main burner rectification effect, negative pressure wefting insertion effect and the weft yarn acceleration effect of this type are all better, thereby uses wider.
Affect the factor of jet loom for drawing weft yarn effect except the structure of main burner, the size of supply gas pressure also has considerable impact to the wefting insertion effect of main burner.But current, supply gas pressure only just can be adjusted to some extent for the yarn without type, and the structure of used in jet loom main burner can't change, the problem existing is like this exactly, under the supply gas pressure of main flow, the wefting insertion better performances of this main burner performance, and its wefting insertion performance can not meet the running of high-speed air-jet looms under low supply gas pressure, main manifestations is that main burner exit flow speed is lower, and then the speed of weft yarn flight is also lower, obviously can greatly limit like this operating efficiency that rotating speed exceedes the high-speed air-jet looms of 1000r/min.
For above-mentioned technical problem, Granted publication CN 202107855U, the disclosure of the invention in January 11 2012 Granted publication day a kind of for the main nozzle of jet loom under low supply gas pressure, comprise nozzle body, in it, be provided with nozzle core, between nozzle core outside and nozzle body inner chamber, form air chamber and rectifier tank, in nozzle body, be positioned at the nozzle core other end and be provided with taper sheath, between taper sheath and rectifier tank curved surface, form subsonic speed accelerating region, the described nozzle body other end is provided with yarn-guide tube, yarn-guide tube inner chamber and taper sheath and the nozzle core port of export form throat, it is characterized in that: on the vertical section of the central axis through described nozzle body, taking the central axis of described nozzle body as x axle, the straight line of the starting point by rectifier tank curved surface and vertical section intersection is y axle, x axle and y axle intersection point are 0 point, set up rectangular coordinate system, described rectifier tank curved surface and vertical section intersection be shaped as y=17 × x
2÷ 60-17 × x ÷ 10+3.5, described throat opening area is 4.8mm
2.This invention, by given rectifier tank curve form, increases throat opening area, improves main burner exit flow speed, improves the suffered tractive force of weft yarn and flying speed, adapts to the running of air-jet loom.
The shape of the wefting insertion flow path area of the main burner described in foregoing invention is fixed, and wefting insertion flow path area mainly comprises a conical cavity and elongated circular cavity, and when wefting insertion, weft yarn enters elongated circular cavity through the conical cavity of wefting insertion flow path area, then enters yarn-guide tube.In real operation, due to the difference of weave cotton cloth material, required weft yarn has dividing of thickness.If elongated circular cavity internal diameter designs too smallly, heavy filling/pick yarn is difficult to pass through; If elongated circular cavity internal diameter designs greatlyr, though can ensure that thicker weft yarn also can pass through, still, in the time that thinner weft yarn passes through described elongated circular cavity, weft yarn may be along with air-flow drift in elongated circular cavity, and weft yarn is advanced unstable.In addition, carry thinner weft yarn to be unfavorable for improving the speed that weft yarn is carried with the larger elongated circular cavity of internal diameter.
Summary of the invention:
Technical problem solved by the invention: the wefting insertion flow path area in main nozzle of jet loom of the prior art, because shape is fixed, may not meet compared with the guiding of heavy filling/pick yarn, especially the elongated circular cavity in wefting insertion flow path area, allow to meet compared with the guiding of heavy filling/pick yarn, but, for for fine weft, it is just excessive that wefting insertion flow path area seems, when pressure differential one timing at wefting insertion flow path area two ends, excessive wefting insertion flow path area is unfavorable for the raising of weft yarn transporting velocity, and weft yarn is advanced also unstable therein.
The invention provides following technical scheme: a kind of main burner of air-jet loom, comprise nozzle body, be arranged on the nozzle core in nozzle body, be arranged on the yarn-guide tube being connected with nozzle core in nozzle body, in described nozzle body, offer air flow inlet, described nozzle core comprises nozzle core main body and taper sheath, between described nozzle core main body and taper sheath, be provided with subsonic speed accelerating region, in described nozzle core main body, offer air chamber, rectifier tank, described air flow inlet is communicated with air chamber, described air chamber is communicated with rectifier tank, described rectifier tank is communicated with subsonic speed accelerating region, described subsonic speed accelerating region is communicated with yarn-guide tube, described nozzle core main body is provided with wefting insertion flow path area, described wefting insertion flow path area comprises conical cavity and elongated circular cavity, described conical cavity is in communication with the outside, described elongated circular cavity is communicated with yarn-guide tube.Described main burner also comprises wefting insertion sub-assembly, and described wefting insertion sub-assembly comprises wefting insertion parts and seal, described wefting insertion parts hollow, and described wefting insertion sub-assembly is arranged in described wefting insertion flow path area, and described seal is between wefting insertion parts and conical cavity wall.
By technique scheme, when wefting insertion, the high pressure draught that air accumulator provides enters main burner by air flow inlet, air motion direction disorder in air chamber is unordered, after rectifier tank, air-flow becomes the direct current along axis direction from high-speed eddy, and the air-flow after rectification enters subsonic speed accelerating region, then enters yarn-guide tube.Due to the effect of high velocity air, can form negative pressuren zone at nozzle core and yarn-guide tube intersection, the existence of negative pressure makes ambient atmosphere take weft yarn and enters wefting insertion flow path area, and enter in the cavity of wefting insertion parts, cavity through wefting insertion parts enters yarn-guide tube again, high velocity air and weft yarn be fully effect in yarn-guide tube, and weft yarn is guided.Wherein, the large I of the internal diameter of the cavity of wefting insertion parts is made according to the thickness of weft yarn, to adapt to the different weft yarn of thickness, for example, guides thicker weft yarn, and the wefting insertion parts that cavity internal diameter is larger are installed in wefting insertion flow path area; Guide thinner weft yarn, the wefting insertion parts that cavity internal diameter is less are installed in wefting insertion runner.So, under the certain prerequisite of the pressure differential at wefting insertion flow path area two ends, the existence of wefting insertion parts can improve the flow through speed of wefting insertion flow path area of weft yarn, can not slow down than excessive the advance unstable or speed of weft yarn that causes of weft yarn because of wefting insertion flow path area.Wherein, the existence of seal can improve the sealing between wefting insertion parts and wefting insertion flow path wall.
Further illustrate as of the present invention, described wefting insertion parts comprise conus portion and cylindrical portion, described sealing member sheathing is at conus portion outer surface, and described conus portion is positioned at the conical cavity of wefting insertion flow path area, and described cylindrical portion is positioned at the elongated circular cavity of wefting insertion flow path area.
As a further improvement on the present invention, described conus portion outer surface is provided with projecting edge, and described projecting edge is for carrying out spacing to seal.
As a further improvement on the present invention, in described elongated circular cavity, offer internal thread, the cylindrical portion of described wefting insertion parts is provided with external screw thread, and described wefting insertion sub-assembly is threaded connection in wefting insertion flow path area.On the end face of the conus portion of described wefting insertion parts, offer strip groove.The existence of the strip groove personnel that are convenient to operation install or change wefting insertion sub-assembly with screwdriver.
As a further improvement on the present invention, the cylindrical portion of described wefting insertion parts is given prominence to described nozzle core main body, and the cylindrical portion of described outstanding nozzle core main body is positioned at yarn-guide tube, and described cylindrical portion excircle and yarn-guide tube inwall form cavum laryngis.Air-flow enters cavum laryngis after subsonic speed accelerating region, can meet or exceed local velocity of sound in the air velocity in cavum laryngis exit.
Brief description of the drawings:
Below in conjunction with accompanying drawing, the present invention is described further:
Fig. 1 is the structural representation of the main burner of a kind of air-jet loom of the present invention;
Fig. 2 is the enlarged drawing at B place in Fig. 1;
Fig. 3 is A-A sectional drawing in Fig. 1;
Fig. 4 is the structural representation of wefting insertion parts in Fig. 2;
Fig. 5 is the structural representation of observing wefting insertion parts gained in Fig. 4 from left side;
Fig. 6 is the structural representation of seal in Fig. 2.
Symbol description in figure:
10-nozzle body; 101-air flow inlet;
20-nozzle core; 201-subsonic speed accelerating region; 202-air chamber; 203-rectifier tank; 204-cavum laryngis; 210-wefting insertion flow path area; 211-conical cavity; The elongated circular cavity of 212-; 21-nozzle core main body; 22-taper sheath; 23-wefting insertion sub-assembly; 231-wefting insertion parts; 2311-conus portion; 2312-cylindrical portion; 2313-projecting edge; 2314-strip groove; 232-seal;
30-yarn-guide tube.
Detailed description of the invention:
As shown in Figure 1, a kind of main burner of air-jet loom, comprise nozzle body 10, be arranged on the nozzle core 20 in nozzle body 10, be arranged on the yarn-guide tube 30 being connected with nozzle core 20 in nozzle body 10, in described nozzle body 10, offer air flow inlet 101, described nozzle core 20 comprises nozzle core main body 21 and taper sheath 22, between described nozzle core main body 21 and taper sheath 22, be provided with subsonic speed accelerating region 201, in described nozzle core main body 21, offer air chamber 202, rectifier tank 203 (as shown in Figure 3), described air flow inlet 101 is communicated with air chamber 202, described air chamber 202 is communicated with rectifier tank 203, described rectifier tank 203 is communicated with subsonic speed accelerating region 201, described subsonic speed accelerating region 201 is communicated with yarn-guide tube 30.
As shown in Figure 1, described nozzle core main body 21 is provided with wefting insertion flow path area 210, and described wefting insertion flow path area 210 comprises conical cavity 211 and elongated circular cavity 212, and described conical cavity 211 is in communication with the outside, and described elongated circular cavity 212 is communicated with yarn-guide tube 30.In described elongated circular cavity 212, offer internal thread.
As shown in Figure 1 and Figure 2, described main burner also comprises wefting insertion sub-assembly 23, and described wefting insertion sub-assembly 23 comprises wefting insertion parts 231 and seal 232 (as shown in Figure 6), described wefting insertion parts 231 hollows.As shown in Figure 4, Figure 5, described wefting insertion parts 231 comprise conus portion 2311 and cylindrical portion 2312, described conus portion 2311 outer surfaces are provided with projecting edge 2313, on the end face of the conus portion 2311 of described wefting insertion parts 231, offer strip groove 2314, the cylindrical portion 2312 of described wefting insertion parts 231 is provided with external screw thread.
As shown in Figure 1 and Figure 2, described wefting insertion sub-assembly 23 is arranged in described wefting insertion flow path area 210, described seal 232 is sleeved on conus portion 2311 outer surfaces, described seal 232 is between wefting insertion parts 231 and conical cavity 211 walls, and described cylindrical portion 2312 is threaded connection in the elongated circular cavity 212 of wefting insertion flow path area 210.
As shown in Figure 1, the outstanding described nozzle core main body 21 of cylindrical portion 2312 of described wefting insertion parts 231, the cylindrical portion 2312 of described outstanding nozzle core main body 21 is positioned at yarn-guide tube 30, and described cylindrical portion 2312 excircles and yarn-guide tube 30 inwalls form cavum laryngis 204.
When wefting insertion, the high pressure draught that air accumulator provides enters main burner by air flow inlet 101, air motion direction disorder in air chamber 202 is unordered, after rectifier tank 203, air-flow becomes the direct current along axis direction from high-speed eddy, and the air-flow after rectification enters subsonic speed accelerating region 201, along with constantly dwindling of throat's 204 areas, air velocity in throat 204 exits can meet or exceed local velocity of sound, meets wefting insertion needs.Due to the effect of high velocity air, can form negative pressuren zone at nozzle core 20 and yarn-guide tube 30 intersections, the existence of negative pressure makes ambient atmosphere take weft yarn and enters wefting insertion flow path area 210, and enter in the cavity of wefting insertion parts 231, cavity through wefting insertion parts 231 enters yarn-guide tube 30 again, high velocity air and weft yarn be in the interior abundant effect of yarn-guide tube 30, and weft yarn is guided.
Above content is only preferred embodiments of the present invention, for those of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, and this description should not be construed as limitation of the present invention.
Claims (6)
1. the main burner of an air-jet loom, comprise nozzle body (10), be arranged on the nozzle core (20) in nozzle body (10), be arranged on the yarn-guide tube (30) being connected with nozzle core (20) in nozzle body (10), in described nozzle body (10), offer air flow inlet (101), described nozzle core (20) comprises nozzle core main body (21) and taper sheath (22), between described nozzle core main body (21) and taper sheath (22), be provided with subsonic speed accelerating region (201), in described nozzle core main body (21), offer air chamber (202), rectifier tank (203), described air flow inlet (101) is communicated with air chamber (202), described air chamber (202) is communicated with rectifier tank (203), described rectifier tank (203) is communicated with subsonic speed accelerating region (201), described subsonic speed accelerating region (201) is communicated with yarn-guide tube (30), described nozzle core main body (21) is provided with wefting insertion flow path area (210), described wefting insertion flow path area (210) comprises conical cavity (211) and elongated circular cavity (212), described conical cavity (211) is in communication with the outside, described elongated circular cavity (212) is communicated with yarn-guide tube (30), it is characterized in that: also comprise wefting insertion sub-assembly (23), described wefting insertion sub-assembly (23) comprises wefting insertion parts (231) and seal (232), described wefting insertion parts (231) hollow, described wefting insertion sub-assembly (23) is arranged in described wefting insertion flow path area (210), described seal (232) is positioned between wefting insertion parts (231) and conical cavity (211) wall.
2. the main burner of a kind of air-jet loom as claimed in claim 1, it is characterized in that: described wefting insertion parts (231) comprise conus portion (2311) and cylindrical portion (2312), described seal (232) is sleeved on conus portion (2311) outer surface, described conus portion (2311) is positioned at the conical cavity (211) of wefting insertion flow path area (210), and described cylindrical portion (2312) is positioned at the elongated circular cavity (212) of wefting insertion flow path area (210).
3. the main burner of a kind of air-jet loom as claimed in claim 2, is characterized in that: described conus portion (2311) outer surface is provided with projecting edge (2313).
4. the main burner of a kind of air-jet loom as claimed in claim 2, it is characterized in that: in described elongated circular cavity (212), offer internal thread, the cylindrical portion (2312) of described wefting insertion parts (231) is provided with external screw thread, and described wefting insertion sub-assembly (23) is threaded connection in wefting insertion flow path area (210).
5. the main burner of a kind of air-jet loom as claimed in claim 4, is characterized in that: on the end face of the conus portion (2311) of described wefting insertion parts (231), offer strip groove (2314).
6. the main burner of a kind of air-jet loom as claimed in claim 2, it is characterized in that: the outstanding described nozzle core main body (21) of cylindrical portion (2312) of described wefting insertion parts (231), the cylindrical portion (2312) of described outstanding nozzle core main body (21) is positioned at yarn-guide tube (30), and described cylindrical portion (2312) excircle and yarn-guide tube (30) inwall form cavum laryngis (204).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410406062.2A CN104195727A (en) | 2014-08-18 | 2014-08-18 | Main jet of air jet loom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410406062.2A CN104195727A (en) | 2014-08-18 | 2014-08-18 | Main jet of air jet loom |
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| Publication Number | Publication Date |
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| CN104195727A true CN104195727A (en) | 2014-12-10 |
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| CN201410406062.2A Pending CN104195727A (en) | 2014-08-18 | 2014-08-18 | Main jet of air jet loom |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0069272A2 (en) * | 1981-07-02 | 1983-01-12 | Nissan Motor Co., Ltd. | A weft inserting nozzle of an air-jet type weaving loom |
| BE904260A (en) * | 1986-02-21 | 1986-08-21 | Picanol Nv | Apparatus for the insertion of weft threads in GAAP at airjet weaving machines and adjustable blowers. |
| CN202107855U (en) * | 2011-06-20 | 2012-01-11 | 苏州大学 | Jet loom main nozzle used under a low air-supply pressure |
| CN203174280U (en) * | 2013-04-16 | 2013-09-04 | 苏州大学 | Main nozzle structure of jet type textile machine |
| CN203715837U (en) * | 2013-12-10 | 2014-07-16 | 苏州大学 | Main spray nozzle structure of air-jet loom |
-
2014
- 2014-08-18 CN CN201410406062.2A patent/CN104195727A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0069272A2 (en) * | 1981-07-02 | 1983-01-12 | Nissan Motor Co., Ltd. | A weft inserting nozzle of an air-jet type weaving loom |
| BE904260A (en) * | 1986-02-21 | 1986-08-21 | Picanol Nv | Apparatus for the insertion of weft threads in GAAP at airjet weaving machines and adjustable blowers. |
| US4813460A (en) * | 1986-02-21 | 1989-03-21 | Picanol N.V. | Device for the insertion of weft threads into the shed of air-looms and adjustable blowers used to this end |
| CN202107855U (en) * | 2011-06-20 | 2012-01-11 | 苏州大学 | Jet loom main nozzle used under a low air-supply pressure |
| CN203174280U (en) * | 2013-04-16 | 2013-09-04 | 苏州大学 | Main nozzle structure of jet type textile machine |
| CN203715837U (en) * | 2013-12-10 | 2014-07-16 | 苏州大学 | Main spray nozzle structure of air-jet loom |
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Effective date of abandoning: 20170301 |
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