CN101829639B

CN101829639B - Injector with adjustable distance between nozzle and mixing chamber inlet and adjustable nozzle critical sectional area

Info

Publication number: CN101829639B
Application number: CN201010186622XA
Authority: CN
Inventors: 杜战奇
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-05-28
Filing date: 2010-05-28
Publication date: 2012-04-25
Anticipated expiration: 2030-05-28
Also published as: CN101829639A

Abstract

The invention discloses an injector with an adjustable distance between a nozzle and a mixing chamber inlet and an adjustable nozzle critical sectional area. The injector comprises a valve body and an injector body which is connected with the front end of the valve body and is provided with a mixing chamber and a driving fluid inlet, wherein a guide sleeve is arranged in the injector body and is communicated with an inner cavity of the valve body; a valve rod is axially arranged in the valve body and the guide sleeve; the back end of the valve body is provided with a nut; the valve rod is in threaded connection with the nut; the front end of the guide sleeve is provided with the nozzle and a valve core; the valve core is connected with the front end of the valve rod; the back end of the nozzle is connected with a sleeve provided with inside threads; the valve core is provided with a rotating wheel of which the rim is provided with outside threads; the sleeve is movably arranged in a guide groove on an inner wall of the guide sleeve through a sliding key; and the rotating wheel is connected with the sleeve through the threads. The injector has the advantages of adjustable distance between the nozzle and the mixing chamber inlet, adjustable nozzle critical sectional area, high injection efficiency, good energy-saving effect and wide application range.

Description

Nozzle and mixing chamber inlet distance and the long-pending adjustable injector of critical throat section

Technical field

The present invention relates to a kind of injector, be specifically related to the long-pending adjustable injector of a kind of nozzle and mixing chamber inlet distance and critical throat section.

Background technology

The injector of work under rigid condition has only been given play to maximum efficient at the condition of work Shi Caihui that meets design requirement.When the parameter drift-out design parameter of work, injection and fluid-mixing, if there is not artificial timely adjusting, ejector efficiency will sharply reduce.In order to improve ejector efficiency, must be adjusted.The regulative mode that is adopted at present mainly contains two kinds: a kind of is the valve of regulating on the working fluid pipeline; A kind of is the throat area that changes main jet, and this adjusting can realize through a tapered rod (pin) that extend in the nozzle.Adopting a plurality of compact injector parallel connections to replace an injector is the special case of a kind of regulative mode in back.In above-mentioned control method, the valve that turns down on the working fluid pipeline can cause restriction loss, and the acting ability of working fluid will reduce.Adopt a plurality of compact injector parallel connections to replace the method for an injector then can make device complicated.

Summary of the invention

The objective of the invention is deficiency, nozzle and the mixing chamber inlet distance and the long-pending adjustable injector of critical throat section of a kind of high efficiency, applied range, good energy-conserving effect is provided to the prior art existence.

Technical scheme of the present invention is: a kind of nozzle and mixing chamber inlet distance and the long-pending adjustable injector of critical throat section; Comprise the valve body that is provided with the working fluid import and be connected with the valve body front end and be provided with the ejector body of mixing chamber and driving fluid import; It is characterized in that: be provided with fairlead in the said ejector body, fairlead and said valve body be positioned on the same axis and with the intracavity inter-connection of valve body, a valve rod axially is set in said valve body and the fairlead; The rear end of valve body is provided with nut; Said valve rod is connected with nut thread, and the front end of said fairlead is provided with nozzle and the spool relative with nozzle, and spool is connected with the front end of valve rod; The rear end of said nozzle is fixedly connected the sleeve pipe that has feather key and internal thread; Be set with screwed runner on the wheel rim on the said spool, said sleeve pipe moves through feather key in the guide groove that is arranged on the fairlead inwall, and said runner rotates to be arranged in the sleeve pipe and through screw thread and is connected with sleeve pipe; The pitch of said nut is greater than the thread pitch of sleeve pipe, and the internal thread of nut is identical with the internal thread direction of sleeve pipe.

Be provided with seal between said valve rear end inwall and the valve rod.

The rear port of said valve body is provided with seal gland.

Said seal gland is threaded with valve body.

The present invention compared with prior art has the following advantages:

(1) injector nozzle of the present invention and mixing chamber inlet distance and critical throat section are long-pending adjustable, high efficiency;

(2) applied range owing to have regulatory function, makes and can not use the occasion of injector might use injector because of not satisfying the technological parameter requirement;

(3) working fluid consumption is few, and energy-saving effect is remarkable.

Through the accompanying drawing and the specific embodiment, technical scheme of the present invention is done further detailed description below.

Description of drawings

Fig. 1 is a structural representation of the present invention.

Fig. 2 is the syndeton sketch map of spool of the present invention, nozzle, sleeve pipe, feather key, runner and guide groove.

Description of reference numerals:

The 1-valve rod; The 2-nut; The 3-sealing gland;

The 4-seal; The 5-valve body; The 6-fairlead;

The 7-spool; The 8-nozzle; The 9-ejector body;

The import of 10-working fluid; The 11-mixing chamber; The import of 12-driving fluid;

The 13-guide groove; The 14-runner; The 15-sleeve pipe;

The 16-feather key.

The specific embodiment

As shown in Figure 1; The present invention includes the ejector body 9 that the valve body 5 that is provided with working fluid import 10 is connected with front end with valve body 5 and is provided with mixing chamber 11 and driving fluid import 12, be provided with fairlead 6 in the said ejector body 9, fairlead 6 and said valve body 5 be positioned on the same axis and with the intracavity inter-connection of valve body 5; Working fluid gets into fairlead 6 through the inner chamber of working fluid import 10 and valve body 5; In valve body 5 and fairlead 6, axially be provided with a valve rod 1, be provided with nut 2 in the rear end of valve body 5, valve rod 1 passes the screw of nut 2 and is connected with nut 2 through screw thread; Be provided with nozzle 8 and the spool 7 relative at the front end of fairlead 6 with nozzle 8; Spool 7 is connected with the front end of valve rod 1, and the rear end of nozzle 8 is fixedly connected the sleeve pipe 15 that has internal thread, is set with screwed runner 14 on the wheel rim on the spool 7; Said sleeve pipe 15 moves in the guide groove 13 that is arranged on fairlead 6 inwalls through feather key; Said runner 14 rotates to be arranged in the sleeve pipe 15 and through screw thread and is connected with sleeve pipe 15, and the pitch of said nut 2 is greater than the thread pitch of sleeve pipe 15, and the internal thread of nut 2 is identical with the internal thread direction of sleeve pipe 15.

For preventing that working fluid from leaking from valve rear end, between valve body 5 rear end inwalls and valve rod 1, be provided with seal 4.

For guaranteeing that seal 4 position does not at work change, prevent that seal 4 from being come off by the rear port of valve body 5, the rear port of valve body 5 is provided with seal gland 3, and seal gland 3 and valve body 5 are through being threaded.

Adjustable nozzles 8 is apart from the optimum distance of mixing chamber 11 inlets in the throat area of regulating nozzle 8 of the present invention.During adjusting; At first rotate the valve rod 1 that is meshed with nut 2 through screw thread through manual or electric operator; Valve rod 1 drives the spool 7 that is welded on its front end and when work radially rotates, moves forward and backward vertically; The runner 14 that rotates with spool 7 drives the sleeve pipe 15 that is meshed with it through screw thread, makes sleeve pipe 15 drive the guide groove 13 of nozzle 8 on fairlead 6 inwalls of the guide effect lower edge of feather key 16 and moves forward and backward.Because moving of spool 7 changed the relative distance between nozzle 8 and the spool 7, thereby adjusted the throat area of nozzle 8, nozzle 8 moves forward and backward along guide groove 13, has then adjusted nozzle 8 and the distance of mixing chamber 11 inlets and the flow area of driving fluid.In concrete work, can select best pitch according to the injector different parameters; The pitch of nut 2 should be greater than the thread pitch of sleeve pipe 15; And the internal thread of nut 2 is identical with the internal thread direction of sleeve pipe 15; When diminishing with the throat area that guarantees injector nozzle 8 of the present invention, nozzle 8 diminishes apart from the distance of mixing chamber 11 inlets, and the flow area of driving fluid diminishes; When the throat area of nozzle 8 became big, nozzle 8 became big apart from the distance of mixing chamber 11 inlets, and it is big that the flow area of driving fluid becomes.

Claims

1. the long-pending adjustable injector of nozzle and mixing chamber inlet distance and critical throat section; Comprise the valve body (5) that is provided with working fluid import (10) and be connected with valve body (5) front end and be provided with the ejector body (9) of mixing chamber (11) and driving fluid import (12); It is characterized in that: be provided with fairlead (6) in the said ejector body (9); Fairlead (6) and said valve body (5) be positioned on the same axis and with the intracavity inter-connection of valve body (5); In said valve body (5) and the fairlead (6) valve rod (1) is set axially, the rear end of valve body (5) is provided with nut (2), and said valve rod (1) is threaded with nut (2); The front end of said fairlead (6) is provided with nozzle (8) and the spool (7) relative with nozzle (8); Spool (7) is connected with the front end of valve rod (1), and the rear end of said nozzle (8) is fixedly connected the sleeve pipe (15) that has feather key (16) and internal thread, is set with screwed runner (14) on the wheel rim on the said spool (7); Said sleeve pipe (15) moves through feather key (16) and is arranged in the guide groove (13) on fairlead (6) inwall, and said runner (14) rotates to be arranged in the sleeve pipe (15) and also is connected with sleeve pipe (15) through screw thread; The pitch of said nut (2) is greater than the thread pitch of sleeve pipe (15), and the internal thread of nut (2) is identical with the internal thread direction of sleeve pipe (15).

2. nozzle according to claim 1 and mixing chamber inlet distance and the long-pending adjustable injector of critical throat section is characterized in that: be provided with seal (4) between said valve body (5) rear end inwall and the valve rod (1).

3. nozzle according to claim 2 and mixing chamber inlet distance and the long-pending adjustable injector of critical throat section, it is characterized in that: the rear port of said valve body (5) is provided with seal gland (3).

4. nozzle according to claim 3 and mixing chamber inlet distance and the long-pending adjustable injector of critical throat section, it is characterized in that: said seal gland (3) is threaded with valve body (5).