CN114160325A - Ejector adaptive to variable working condition adjustment - Google Patents
Ejector adaptive to variable working condition adjustment Download PDFInfo
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- CN114160325A CN114160325A CN202111265664.7A CN202111265664A CN114160325A CN 114160325 A CN114160325 A CN 114160325A CN 202111265664 A CN202111265664 A CN 202111265664A CN 114160325 A CN114160325 A CN 114160325A
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- primary flow
- guide pipe
- probe
- distance adjusting
- annular
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
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- Jet Pumps And Other Pumps (AREA)
Abstract
The invention relates to an injector adaptive to adjustment under variable working conditions, which comprises a primary flow guide pipe, wherein one end of the primary flow guide pipe is connected with a nozzle, the other end of the primary flow guide pipe is in threaded connection with one end of a probe through a probe gland, the other end of the probe extends into the throat part of the nozzle, a premixing chamber is coaxially sleeved on the periphery of the primary flow guide pipe, the premixing chamber is in clearance fit with the primary flow guide pipe, one end of the premixing chamber is in threaded connection with a distance adjusting element, the distance adjusting element is connected with the primary flow guide pipe through a connecting mechanism, a diffusion chamber is fixed at the other end of the premixing chamber, and the nozzle extends into a first flow passage of the diffusion chamber.
Description
Technical Field
The invention relates to the technical field of ejectors, in particular to an ejector adaptive to variable working condition adjustment.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art. The ejector is a component which can increase the pressure of the ejection fluid without directly consuming electric energy or mechanical energy. In a jet refrigeration system, it functions as a compressor in a conventional vapor compression refrigeration system. In addition, the ejector is also widely applied to occasions of LNG cold energy recovery, seawater desalination, SOFC fuel cells and the like, wherein primary flow with certain pressure pumps secondary flow with lower pressure to recover energy.
Since the inside of the ejector transfers energy through supersonic fluid collision, and the internal mixing process is very complicated, the ejector is generally designed to be a fixed structure designed for a fixed working condition. However, in the CFD simulation, it is found that the ejector of the fixed structure has a poor operation effect on variable working conditions, which greatly reduces the injection ratio μ of the ejector, and even causes the ejector not to work normally, thereby reducing the coefficient of performance of the system. Researches of scholars at home and abroad show that structural parameters of the ejector have important influence on the performance of the ejector, particularly the adjustment of two structural parameters of the throat Area (AR) and the nozzle pitch (NXP) of the nozzle is focused, and the adjustment of the two parameters can basically realize the adjustment of the working conditions (temperature and load) of the system.
In the prior art, there are ejectors capable of automatic adjustment, for example, chinese patent nos. CN106861961B and CN110841821B disclose an ejector capable of automatically adjusting the nozzle throat Area (AR) and the nozzle pitch (NXP) according to the change of the primary flow pressure, and taking the description of chinese patent No. CN106861961B about automatic adjustment as an example, the patent mentions that when the primary flow pressure increases, the adjusting effect of the ejector is that NXP decreases and AR increases. As can be seen from the CFD simulation, the primary flow pressure varies and the optimum performance of the ejector is maintained under otherwise constant conditions, the inventors have found that the adjustment of the ejectors NXP and AR is not a simple relationship as described in the patent, and that the exact opposite adjustment may occur under the same variation, and in a manner completely opposite to that described in the chinese patent with publication number CN 110841821B. In summary, the above-mentioned injector can only be adjusted linearly according to the set relationship, the injector cannot achieve the best injection effect under variable working conditions, and the best structure of the injector cannot be found, and in addition, the above-mentioned two patents do not consider the conditions of the actual experiment, and the designed injector must be connected with other components in the system in a matching manner in the experiment process, so that in the process of automatic adjustment, the telescopic device described in the patent must be interfered by the connecting component thereof, and the reliability of automatic adjustment is affected.
In addition, chinese patent with publication number CN201827162U discloses a steam jet pump with adjustable nozzle position, which can adjust the nozzle position along the axial direction of the jet pump as required by screwing nuts to control the position of the steam chamber on the positioning screw, but it needs to adjust the nuts on both sides of the flange, and the adjusting elements are many, and cannot be adjusted synchronously and inaccurately. Chinese patent No. CN203670313U discloses an ejector pump with an adjustable nozzle position, but it needs to make a spiral groove suitable for rolling of a ball, and the structure is complex, and there is no rectification process before the secondary flow enters the ejector to be ejected, which may cause the secondary flow to be turbulent and affect the performance of the ejector.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an ejector adaptive to variable working condition adjustment, which can be used for randomly adjusting the structure of the ejector and finding out the optimal structural parameters.
In order to achieve the purpose, the invention adopts the following technical scheme:
the embodiment of the invention provides an injector adaptive to variable working condition adjustment, which comprises a primary flow guide pipe, wherein one end of the primary flow guide pipe is connected with a nozzle, the other end of the primary flow guide pipe is in threaded connection with one end of a probe through a probe gland, the other end of the probe extends into the throat part of the nozzle, a premixing chamber is coaxially sleeved on the periphery of the primary flow guide pipe and is in clearance fit with the primary flow guide pipe, one end of the premixing chamber is in threaded connection with a distance adjusting element, the distance adjusting element is connected with the primary flow guide pipe through a connecting mechanism, a diffusion chamber is fixed at the other end of the premixing chamber, and the nozzle extends into a first flow passage of the diffusion chamber.
Optionally, a centering ring is arranged inside the primary flow conduit, and the probe passes through the centering ring and is in clearance fit with the centering ring.
Optionally, an internal threaded pipe is arranged at the end part of the primary flow guide pipe connected with the probe, the internal threaded pipe is in threaded connection with a probe gland, the probe gland is in threaded connection with the probe, and a sealing filler is filled between the probe gland and the end surface of the primary flow guide pipe opposite to the probe gland;
furthermore, the end surface of the probe gland close to the primary flow guide pipe is an annular conical surface, and the section area of one end close to the primary flow guide pipe is larger than that of the other end.
Optionally, one end of the probe extends into the throat of the nozzle, and the other end of the probe is provided with a screwing structure matched with the wrench.
Optionally, a primary flow inlet pipe is arranged on the pipe wall of the primary flow conduit, and the primary flow inlet pipe is communicated with the second flow channel in the primary flow conduit.
Optionally, a third flow channel with a diameter larger than the outer diameter of the primary flow conduit is arranged in the premixing chamber, the primary flow conduit passes through the premixing chamber through the third flow channel, the third flow channel is provided with an annular blocking platform, and the primary flow conduit passes through the annular blocking platform and is in clearance fit with the annular blocking platform so that the primary flow conduit can move along the axis direction of the primary flow conduit and the coaxiality of the primary flow conduit and the premixing chamber is ensured.
Optionally, the part of the premixing chamber on one side of the annular baffle table is in threaded connection with a conduit gland, a sealing filler is filled between the conduit gland and the end face opposite to the annular baffle table, and the space of a third flow passage on the other side of the annular baffle table is communicated with a secondary flow inlet pipe connected to the premixing chamber;
furthermore, the end surface of the guide pipe gland close to the annular blocking platform is an annular conical surface, and the cross-sectional area of one end close to the annular blocking platform is larger than that of the other end.
Optionally, the connection mechanism includes a distance adjusting flange sleeved on the periphery of the primary flow guide pipe, a gap is formed between the distance adjusting flange and the primary flow guide pipe, the distance adjusting flange is fixedly connected with the distance adjusting element through a connecting piece, an annular boss located between the distance adjusting flange and the distance adjusting element is arranged on the pipe wall of the primary flow guide pipe, a ball is arranged between the annular boss and the distance adjusting element, and a ball is arranged between the annular boss and the distance adjusting flange.
Optionally, a first annular groove is formed in the end face, close to the annular boss, of the distance adjusting element, a plurality of first circular grooves are formed in the end face, close to the distance adjusting element, of the annular boss, and balls between the annular boss and the distance adjusting element are placed in the first annular groove and the first circular grooves;
the end face of the distance adjusting flange, which is close to the annular boss, is provided with a second annular groove, the end face of the annular boss, which is close to the distance adjusting flange, is provided with a plurality of second circular grooves, and balls between the annular boss and the distance adjusting flange are placed in the second annular groove and the second circular grooves.
Optionally, the premixing chamber is connected with the diffusion chamber by a flange structure.
The beneficial effects of the invention are as follows:
1. according to the ejector disclosed by the invention, one end of the probe is in threaded connection with the primary flow guide pipe through the probe gland, the other end of the probe extends into the throat part of the nozzle, the area of the throat part of the nozzle can be adjusted by rotating the probe, the premixing chamber is in threaded connection with the distance adjusting element, and the primary flow guide pipe can be driven to move along the axis direction of the primary flow guide pipe by rotating the distance adjusting element, so that the adjustment of the nozzle distance is realized, the throat area and the nozzle distance can be independently and randomly adjusted, the structure of the ejector can be randomly adjusted, and the optimal structural parameters can be conveniently found to achieve the optimal ejection effect.
2. According to the ejector disclosed by the invention, the secondary flow inlet pipe is communicated with the third flow channel of the premixing chamber, and the third flow channel and the primary flow guide pipe form a longer horizontal annular channel, so that a buffer area is provided for the flow of the secondary flow, and the flow field of the secondary flow can be more uniform.
3. According to the ejector, the balls are arranged, so that the primary flow guide pipe cannot rotate along with the rotation of the distance adjusting element and the distance adjusting flange, the requirement for adjusting the nozzle distance is met, and convenience is provided for the follow-up primary flow guide pipe to be connected into a system pipeline.
4. According to the ejector, the probe and the distance adjusting element are connected through the threads, so that the ejector is convenient to adjust and accurate and reliable in adjustment.
5. The ejector is provided with the probe gland, the guide pipe gland and the sealing packing, and the end surfaces of the probe gland and the guide pipe gland are annular conical surfaces, so that the dynamic sealing of the probe and the primary flow guide pipe in the moving process is ensured.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a schematic view of the overall structure of embodiment 1 of the present invention;
FIG. 2 is a sectional view showing the whole structure of embodiment 1 of the present invention;
FIG. 3 is a schematic view of an assembly of a primary flow conduit, probe gland, probe and nozzle according to example 1 of the present invention;
FIG. 4 is a schematic view of the probe gland and the sealing packing sealing principle in embodiment 1 of the present invention;
FIG. 5 is a schematic view of the assembly of the primary flow conduit, the pre-mixing chamber, the distance adjusting nut and the connecting mechanism according to example 1 of the present invention;
the device comprises a primary flow guide pipe 1, a premixing chamber 2, a diffusion chamber 3, a nozzle 4, a probe gland 5, a probe 6, a centering ring 7, a primary flow inlet pipe 8, a secondary flow inlet pipe 9, a guide pipe gland 10, a screwing structure 11, a distance adjusting nut 12, a distance adjusting flange 13, an annular boss 14, a ball 15, a second connecting bolt 16, a sealing filler 17, a radial sealing surface 17-1, an axial sealing surface 17-2, a first connecting bolt 18, a locking nut 19 and a protrusion 20.
Detailed Description
Example 1
The embodiment provides an injector adaptive to variable working condition adjustment, as shown in fig. 1-2, the injector comprises a primary flow conduit 1, a premixing chamber 2 is coaxially sleeved on the periphery of the primary flow conduit 1, a diffusion chamber 3 coaxially arranged with the premixing chamber 2 is fixed at one end of the premixing chamber 2, a first flow passage is arranged in the diffusion chamber 3, a second flow passage is arranged in the primary flow conduit 1, and a third flow passage is arranged in the premixing chamber 3. The diameter of the third flow channel is larger than the outer diameter of the primary flow conduit 1, so that the primary flow conduit 1 passes through the premixing chamber through the third flow channel, the first flow channel, the second flow channel and the third flow channel being used for the flow of liquid or gas.
As shown in fig. 3, one end of the primary flow conduit 1 is provided with a nozzle 4, and the nozzle 4 extends into the interior of the first flow channel in the diffusion chamber 3. In this embodiment, the nozzle 4 is a laval nozzle, and the laval nozzle is butt-welded to the primary flow duct 1.
The other end of the primary flow conduit 1 is provided with an internal thread pipe which is coaxial with the primary flow conduit, and the internal thread pipe is fixedly connected with the probe gland 5 through threads.
A probe 6 is arranged in a second flow channel in the primary flow guide pipe 1, and the probe 6 and the primary flow guide pipe 1 are coaxially arranged.
The end part of the probe 6 with the needle tip extends into the throat space of the Laval nozzle, and the other end of the probe 6 penetrates through the end part of the primary flow conduit 1 and the probe gland 5 and is in threaded connection with the probe gland 5.
The probe 6 stretches out to the outside tip of probe gland 5 and is provided with to twist structure 11 with spanner assorted, twist structure 11 and be interior hexagonal hole for twist structure 11 and can cooperate with interior hexagonal spanner, in some other embodiments, twist structure 11 and be the cube structure, make and twist the structure and can cooperate with ordinary spanner, and the skilled person in the art can set up the form of twisting structure 11 according to actual need.
By rotating the probe 6, the probe 6 can move in the direction of its own axis, thereby changing the relative position of the tip portion of the probe and the throat of the laval nozzle, and thus changing the throat area AR of the laval nozzle available for the passage of liquid or gas.
Further, in order to ensure the coaxiality of the probe 6 assembled with the primary flow guide pipe 1, a centering ring 7 is arranged in the primary flow guide pipe, the centering ring 7 is arranged at the end part, close to the nozzle 4, of the second flow passage and is fixedly connected with the inner wall of the primary flow guide pipe 1, and the probe 6 penetrates through the centering ring 7 and is in clearance fit with the centering ring, so that the movement of the probe 6 along the axis direction of the probe 6 cannot be influenced by the centering ring 7. The probe is assembled through the centering ring 7 and the probe gland 5, so that two-point centering is realized, and the coaxiality of the probe 6 is ensured.
In order to ensure the dynamic sealing of the probe 6 during the moving process, a sealing packing 17 is arranged between the probe gland 5 and the end surface opposite to the primary flow guide pipe 1.
In this embodiment, the end surface of the probe gland 5 close to the primary flow guide tube 1 is an annular conical surface, and the cross-sectional area of the end close to the primary flow guide tube is larger than that of the other end.
As shown in fig. 4, when the probe gland 5 presses the packing, the force F acting on the packing is decomposed into a horizontal force F2 and a vertical force F1, the horizontal force applied to the packing can ensure the radial sealing of the probe 6 during the movement, the contact surface of the packing with the primary flow conduit 1 is a radial sealing surface 17-1, the vertical force applied to the packing can ensure the axial sealing of the probe during the movement, and the contact surface of the packing 17 with the probe gland is an axial sealing surface 17-2.
The tube wall of the primary flow conduit 1 is connected with a primary flow inlet tube 8, and the primary flow inlet tube 8 is communicated with the second flow channel and is used for introducing primary flow liquid or gas into the second flow channel.
An annular blocking platform is arranged in the third flow channel, the primary flow guide pipe 1 penetrates through the annular blocking platform and is in clearance fit with the annular blocking platform, the annular blocking platform can ensure the coaxiality of the primary flow guide pipe 1 and the premixing chamber, and the annular blocking platform cannot hinder the movement of the primary flow guide pipe 1 along the axis direction of the annular blocking platform due to the clearance fit.
The space of the third flow passage at one side of the annular baffle table close to the diffusion chamber is used as a passage for flowing secondary flow liquid or gas, the premixing chamber 3 is connected with a secondary flow inlet pipe 9, the secondary flow inlet pipe 9 is communicated with the part of the third flow passage at one side of the annular baffle table close to the diffusion chamber, the third flow passage and the primary flow guide pipe form a longer horizontal annular passage, a buffer area is provided for the flowing of the secondary flow, and the flow field of the secondary flow can be more uniform.
The circulation track of the secondary flow is completely matched with the flow channel set during CFD simulation, so that the accuracy of the simulation result and the real experiment result can be ensured.
The other side of the annular baffle table is provided with a guide pipe gland 10, the guide pipe gland 10 is in threaded connection with the premixing chamber 3, and the primary flow guide pipe 1 penetrates through the guide pipe gland 10 and then enters the inside of the third channel.
In order to realize dynamic sealing when the primary flow conduit 1 moves along the axis of the primary flow conduit, a sealing filler 17 is filled between the end faces of the conduit gland 10 opposite to the annular baffle table.
The end surface of the catheter gland 10 close to one side of the annular blocking platform is an annular conical surface, the cross-sectional area of one end close to the annular blocking platform is larger than that of the other end, the sealing principle of the catheter gland is the same as that of the probe gland, and repeated description is omitted here.
As shown in fig. 5, one end of the premixing chamber 2 is fixedly connected with the diffusion chamber 3, the other end is in threaded connection with a distance adjusting element, the distance adjusting element adopts a distance adjusting nut 12, the distance adjusting nut 12 is in furnace temperature connection with the outer peripheral surface of the end part of the premixing chamber, the distance adjusting nut 12 is connected with the primary flow conduit 1 through a connecting mechanism, and the primary flow conduit 1 can be driven to move along the axis direction of the primary flow conduit 1 through the connecting mechanism.
The connecting mechanism comprises a distance adjusting flange 13, the distance adjusting flange 13 is sleeved on the periphery of the primary flow guide pipe 1, and a gap exists between the distance adjusting flange 13 and the primary flow guide pipe 1, so that the distance adjusting flange can rotate around the axis of the distance adjusting flange, and the distance adjusting flange 13 does not hinder the primary flow guide pipe 1 from moving along the axis of the distance adjusting flange.
The roll adjustment flange 13 is connected with the roll adjustment nut fixing device 12 through a connecting piece, the connecting piece adopts a plurality of first connecting bolts 18 which are evenly distributed along the circumference, the first connecting bolts 18 pass through the roll adjustment nut 12 and the roll adjustment flange 13 and then are screwed with locking nuts 19, and locking and fixing between the roll adjustment nut 12 and the roll adjustment flange 13 are achieved.
The outer peripheral surface of the primary flow guide pipe 1 is integrally provided with an annular boss 14, the annular boss 14 is located between a distance adjusting flange 13 and a distance adjusting nut 12, a plurality of balls 15 which are uniformly distributed along the circumference are arranged between the distance adjusting flange 13 and the annular boss 14, and a plurality of balls 15 which are uniformly distributed along the circumference are arranged between the distance adjusting nut 12 and the annular boss 14.
In order to carry out spacingly to ball 15, prevent that ball 15 from dropping, the terminal surface that roll adjustment component is close to cyclic annular boss is equipped with first ring channel, the terminal surface that cyclic annular boss is close to roll adjustment component is equipped with a plurality ofly and the first circular recess of ball assorted, the groove face of first circular recess is the sphere, preferred four first circular recesses that set up, circumference evenly distributed is followed to first circular recess, first ring channel and first circular recess are put into to the ball between cyclic annular boss and the roll adjustment component, it is corresponding, set up four balls between cyclic annular boss and the roll adjustment component.
The terminal surface that roll adjustment flange is close to cyclic annular boss is equipped with the second ring channel, and the terminal surface that cyclic annular boss is close to roll adjustment flange is equipped with a plurality ofly and ball assorted second circular recess, and is preferred, sets up four second circular recesses, and the groove face of second circular recess is the sphere, and a plurality of second circular recesses are along circumference evenly distributed, and the ball between cyclic annular boss and the roll adjustment flange is put into second ring channel and second circular recess. Correspondingly, four balls are arranged between the annular boss and the distance adjusting flange.
The ball is limited by the circular groove, and the ball 15 is prevented from falling off.
In this embodiment, through setting up ball 15, primary flow pipe 1 can not rotate along with the rotation of roll adjustment nut 12 and roll adjustment flange 13, provides convenience for follow-up primary flow pipe 1 access system pipeline when having satisfied the regulation demand of nozzle distance.
One end of the premixing chamber 2 is in threaded connection with a distance adjusting nut 12, the other end of the premixing chamber is provided with a flange plate, the end part of the diffusion chamber 3, which is used for being connected with the premixing chamber 2, is also provided with a flange plate, and the premixing chamber 2 and the diffusion chamber 3 are detachably and fixedly connected through a flange and a plurality of second connecting bolts 16 which are uniformly distributed along the circumference.
In order to ensure the sealing effect between the premixing chamber 2 and the diffusion chamber 3, the end surface of the premixing chamber 2 is provided with an annular protrusion 20, the annular protrusion 20 is embedded into an annular groove arranged on the end surface of the diffusion chamber 3, and a sealing filler is arranged between the protrusion and the groove surface of the groove.
The first flow path in the diffusion chamber 3 comprises a tapered section, a cylindrical section and a diffusion section, and the Laval nozzle extends into the tapered section.
In this embodiment, let in once flowing liquid or gas in the second runner of once flowing pipe through once flowing inlet pipe 8, let in twice flowing liquid or gas in the third runner of premixing room 2 through twice flowing inlet pipe 9, 6 one end of probe passes through probe gland threaded connection with once flowing pipe 1, the other end stretches into the throat of nozzle, through rotating the probe, can adjust the area of nozzle throat, premixing room threaded connection has pitch nut 12, rotate pitch nut 12, can drive once flowing pipe 1 and move along its self axis direction, and then realized the regulation of nozzle pitch, throat area and nozzle pitch can independently be adjusted wantonly, and then can adjust the sprayer structure wantonly, and can compare with the result of CFD simulation under the structure of difference, conveniently find optimum structural parameter in order to reach best injection effect.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (10)
1. The injector is characterized by comprising a primary flow guide pipe, wherein one end of the primary flow guide pipe is connected with a nozzle, the other end of the primary flow guide pipe is in threaded connection with one end of a probe through a probe gland, the other end of the probe extends into the throat of the nozzle, a premixing chamber is coaxially sleeved on the periphery of the primary flow guide pipe, the premixing chamber is in clearance fit with the primary flow guide pipe, one end of the premixing chamber is in threaded connection with a distance adjusting element, the distance adjusting element is connected with the primary flow guide pipe through a connecting mechanism, a diffusion chamber is fixed at the other end of the premixing chamber, and the nozzle extends into the first flow passage of the diffusion chamber.
2. The variable condition tuning injector of claim 1, wherein the primary flow conduit is internally provided with a centering ring, and the probe passes through the centering ring and is in clearance fit with the centering ring.
3. The ejector adapting to the adjustment under the variable working conditions as claimed in claim 1, wherein the end part of the primary flow guide pipe connected with the probe is provided with an internal thread pipe, the internal thread pipe is in threaded connection with a probe gland, the probe gland is in threaded connection with the probe, and a sealing filler is filled between the probe gland and the end surface of the primary flow guide pipe opposite to the probe gland;
furthermore, the end surface of the probe gland close to the primary flow guide pipe is an annular conical surface, and the section area of one end close to the primary flow guide pipe is larger than that of the other end.
4. The injector adapting to the adjustment under the variable working conditions as claimed in claim 1, wherein one end of the probe extends into the throat part of the nozzle, and the other end of the probe is provided with a screwing structure matched with a wrench.
5. The injector adapting to the adjustment of the variable working conditions as claimed in claim 1, wherein the tube wall of the primary flow conduit is provided with a primary flow inlet tube, and the primary flow inlet tube is communicated with the second flow passage in the primary flow conduit.
6. The injector adaptive to variable operation condition regulation according to claim 1, wherein a third flow passage having a diameter larger than an outer diameter of the primary flow conduit is provided in the premixing chamber, the primary flow conduit passes through the premixing chamber through the third flow passage, the third flow passage is provided with an annular baffle, and the primary flow conduit passes through the annular baffle and is in clearance fit with the annular baffle.
7. The injector adapting to the adjustment under the variable working conditions as claimed in claim 6, wherein the premixing chamber part on one side of the annular baffle platform is in threaded connection with a guide pipe gland, a sealing filler is filled between the guide pipe gland and the end surface opposite to the annular baffle platform, and the space of the third flow passage on the other side of the annular baffle platform is communicated with a secondary flow inlet pipe connected to the premixing chamber;
furthermore, the end surface of the guide pipe gland close to the annular blocking platform is an annular conical surface, and the cross-sectional area of one end close to the annular blocking platform is larger than that of the other end.
8. The injector adapting to the adjustment under the variable working conditions as claimed in claim 1, wherein the connecting mechanism comprises a distance adjusting flange sleeved on the periphery of the primary flow guide pipe, a gap is formed between the distance adjusting flange and the primary flow guide pipe, the distance adjusting flange is fixedly connected with the distance adjusting element through a connecting piece, an annular boss located between the distance adjusting flange and the distance adjusting element is arranged on the pipe wall of the primary flow guide pipe, a ball is arranged between the annular boss and the distance adjusting element, and a ball is arranged between the annular boss and the distance adjusting flange.
9. The injector adapting to the adjustment under the variable working conditions as claimed in claim 1, wherein the end surface of the distance adjusting element close to the annular boss is provided with a first annular groove, the end surface of the annular boss close to the distance adjusting element is provided with a plurality of first circular grooves, and balls between the annular boss and the distance adjusting element are placed in the first annular groove and the first circular grooves;
the end face of the distance adjusting flange, which is close to the annular boss, is provided with a second annular groove, the end face of the annular boss, which is close to the distance adjusting flange, is provided with a plurality of second circular grooves, and balls between the annular boss and the distance adjusting flange are placed in the second annular groove and the second circular grooves.
10. The variable condition tuning injector of claim 1, wherein the premixing chamber is coupled to the diffusion chamber by a flange arrangement.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111265664.7A CN114160325B (en) | 2021-10-28 | 2021-10-28 | Ejector adaptive to variable working condition adjustment |
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| CN202111265664.7A CN114160325B (en) | 2021-10-28 | 2021-10-28 | Ejector adaptive to variable working condition adjustment |
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| CN114160325A true CN114160325A (en) | 2022-03-11 |
| CN114160325B CN114160325B (en) | 2022-10-04 |
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| JP2004298694A (en) * | 2003-03-28 | 2004-10-28 | Tsuneishi Shipbuilding Co Ltd | Liquid droplet jetting nozzle and method for modifying surface of structure using the same |
| CN201705741U (en) * | 2010-05-28 | 2011-01-12 | 杜战奇 | Sprayer capable of adjusting the distance between a nozzle and a mixing chamber inlet and the nozzle critical section |
| CN102121482A (en) * | 2011-01-26 | 2011-07-13 | 双良节能系统股份有限公司 | Nozzle-adjustable steam ejector |
| CN102513247A (en) * | 2011-12-31 | 2012-06-27 | 中能东讯新能源科技(大连)有限公司 | Ejector with adjustable nozzle throat area |
| CN204025368U (en) * | 2014-06-23 | 2014-12-17 | 泛科轴承集团有限公司 | Internal and external cycle labyrinth sealed roller bearing units |
| US20190015855A1 (en) * | 2015-08-28 | 2019-01-17 | Regents Of The University Of Minnesota | Nozzles and methods of mixing fluid flows |
| CN105363582A (en) * | 2015-12-16 | 2016-03-02 | 山东大学 | Needle control device capable of adjusting area of ejector nozzle and ejector |
| US20180202893A1 (en) * | 2016-11-18 | 2018-07-19 | Brian Jeffrey Birch | Wind tunnel with an effective variable nozzle for testing various aerospace specific sensors and probes |
| CN207393591U (en) * | 2017-10-30 | 2018-05-22 | 上海新源动力有限公司 | A kind of fuel battery engine system adjustable aperture and nozzle away from injector |
| CN208373371U (en) * | 2018-05-15 | 2019-01-15 | 威海新元化工有限公司 | A kind of adjustable venturi-type eductors |
| CN109701791A (en) * | 2018-12-27 | 2019-05-03 | 集美大学 | A kind of structure of adjustable injector nozzle position |
| CN111822167A (en) * | 2019-03-26 | 2020-10-27 | 桂林航天工业学院 | Adjustable ejector |
| CN112901566A (en) * | 2021-03-30 | 2021-06-04 | 上海羿沣氢能科技有限公司 | Fuel cell ejector with adjustable working nozzle |
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| CN114160325B (en) | 2022-10-04 |
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