CN104213968A - Underwater multi-phase jet flow silencing and noise reducing device - Google Patents
Underwater multi-phase jet flow silencing and noise reducing device Download PDFInfo
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- CN104213968A CN104213968A CN201410300473.3A CN201410300473A CN104213968A CN 104213968 A CN104213968 A CN 104213968A CN 201410300473 A CN201410300473 A CN 201410300473A CN 104213968 A CN104213968 A CN 104213968A
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Abstract
The invention provides an underwater multi-phase jet flow silencing and noise reducing device, which comprises a tubular casing, wherein four oval cone-shaped through holes are formed in the outer wall of the tubular casing in the annular direction, the outer wall hole diameter is greater than the inner wall hole diameter, the end surface is in an oval shape, the major-minor axis ratio is 1.5:1 to 2.5:1, a gradually reducing spray pipe is fixedly arranged in the casing, the front end of the gradually reducing spray pipe is provided with an annular hole plate, the middle part of the gradually reducing spray pipe is provided with a round tube section, the back end of the gradually reducing spray pipe is provided with a gradually reducing spray nozzle, four through holes are annularly formed in the outer wall surface of the round tube section, the annular hole plate is connected with a front spray pipe, an inner catheter is arranged on the axial line of the casing and is fixedly arranged on the inner wall of the gradually reducing spray pipe, the front part of the inner catheter is provided with a blade, and a porous spray head is fixedly arranged on the inner wall of the outlet end of the inner catheter. The underwater multi-phase jet flow silencing and noise reducing device is used for underground vehicle exhaust, the structure of the device is compact, the device can be directly arranged in an exhaust pipe system and does not occupy the external space, the airflow pulsation, the turbulent and jet flow noise and the bubble noise are eliminated, the noise reducing frequency band is from the pulsation low frequency being 200Hz to the turbulent and jet flow generated high frequency being 5000Hz, and the noise reducing effect is higher than 18dB.
Description
Technical field
The present invention relates to a kind of noise eliminating silencer of multiple-phase jet under water, for Thermal Power Underwater Vehicle System toxic emission noise reduction.
Background technique
The high pressure-temperature waste gas that the thermal power system of submarine navigation device gives off enters in water through jet pipe, forms serious jet noise.Because the propagation of sound depends on the compressibility of medium, in water, the velocity of sound is about 4.4 times of THE VELOCITY OF SOUND IN AIR conventionally, and the velocity of propagation of underwater noise is more much bigger than the speed of a ship or plane of sail body in water.When the large quantity of exhaust gas producing when the thermodynamic device work of submarine navigation device enters at a high speed in water by outer pipe, form complicated gas flow, gas-liquid two-phase flow field structure and with exhaust emission noise, its sound pressure level is high, frequency band is wider, not only underwater environment is caused to noise pollution, also reduced the disguise of self simultaneously, to contained underwater sound equipment formation self noise interference itself, limited the overall performance of submarine navigation device again.
Underwater exhaust process relates to complicated Multiphase Flow, with laminar flow turn twist, the complicated phenomenon such as vorticla motion and change of flow state, its formation of noise mechanism is different from the mechanism of production of air exhaust sound.For the special water high speed exhausting problem of this class, conventional air exhausting silencer method cannot directly be used.Existing underwater exhaust denoising device is exhaust silencer structure of modification in air mostly, although this has saved design time, its soundproof effect is often difficult to arrive index of correlation, has even increased the acoustic pressure of some frequency range, becomes new noise source.Its design principle of existing noise eliminating silencer is mainly based on air noise-cancelling theory, patent 201010238161.6 has designed a kind of flat silencing apparatus, this silencing apparatus is mainly to utilize the combination of expansion chamber structure to eliminate the noise, air-flow is after expansion chamber, acoustic impedance changes, the acoustic reflection of some characteristic frequency of propagating along pipeline is gone back, reach noise elimination object.The silencing apparatus of this Patent design is mainly used in automobile emission, and the flowing medium relating to is mainly air, so this structure is not suitable for the elimination of bubble-liquid two-phase jet noise.
Patent 200620084872.1 has designed a kind of motor silencing apparatus peculiar to vessel, this silencing apparatus has adopted a kind of U-shaped tubular construction, the waste gas that motor gives off is through muffler internal container, and in inner bag, be provided with a plurality of acoustical panels, this silencing apparatus has still adopted traditional air silencer design principle, is mainly by change pipe section and length, to control acoustic reactance size to eliminate the noise.This muffler shell is immersed in water, but main or take gas as main in silencing apparatus, and relief opening is placed in air, so this structure is the simple transplanting of conventional air acoustic wave filter structure.
Not yet find that there is at present the multiple-phase jet denoising device that is directed to submarine navigation device high-speed gas jet.
Summary of the invention
The object of this invention is to provide a kind of noise eliminating silencer of multiple-phase jet under water, to overcome the deficiencies in the prior art.
A multiple-phase jet noise eliminating silencer, is characterized in that this device comprises the cylindrical housings of a tubulose under water, and this housing is evenly offered 4 through holes at outer wall hoop;
Above-mentioned through hole is elliptic conic shape through hole, and the size in outer wall aperture is greater than the size in inwall aperture; And the inside and outside aperture of ellipse hole end face is shaped as ellipse, and major and minor axis ratio is between between 1.5:1 to 2.5:1;
The inwall that is positioned at both sides, through hole front and back at housing is offered two annular grooves;
In annular groove rear end, shoulder block is set, front end be provided with shoulder block;
In described housing, be fixed with convergent jet pipe, this convergent jet pipe front end is that annular oriffice, middle part are that cylindrical section, rear end are negative throat noz(zle), and described annular oriffice is arranged between above-mentioned annular groove and shoulder block;
Described cylindrical section outer wall hoop is evenly offered 4 through holes, and lays respectively at the below of above-mentioned ellipse hole internal face;
In between the annulus of annular oriffice, evenly have 4 apertures, on the sector ring board between aperture, offer many group apertures;
The medial axis of 4 described through holes and the medial axis of 4 through holes are positioned on the same cross section radially of this device;
On the end face that annular oriffice contacts with shoulder block, offer two ring annular grooves,
Described aperture is connected with respectively preposition jet pipe towards a side of rear end, and the straight length diameter of this preposition jet pipe is identical with orifice diameter, and straight length rear end is connected with negative throat noz(zle);
Between annular groove and shoulder block, annular oriffice is installed, the inner ring sleeve of this annular oriffice is put the rear end at described convergent jet pipe; In between the annulus of annular oriffice, evenly have an aperture, on the sector ring board between described aperture, offer many group apertures, on the end face that annular oriffice contacts with shoulder block, offer two ring annular grooves;
Described aperture is connected with respectively rearmounted jet pipe towards a side of front end, and the straight length diameter of this postposition jet pipe is identical with orifice diameter, and straight length front end is connected with negative throat noz(zle); And rearmounted jet pipe and one of them preposition jet pipe have same axis, and the orifice size of preposition jet pipe is less than the diameter of rearmounted jet pipe;
On the axis of described housing, have inner catheter via preposition fin, to be fixed on the inwall of convergent jet pipe, the front portion of this inner catheter is provided with blade, on the inwall of inner catheter outlet end, via rearmounted fin, is fixed with a porous nozzle;
And there are preposition snap ring and rearmounted snap ring to be installed on respectively in above-mentioned two annular grooves.
The through hole of the cylindrical section outer wall of above-mentioned convergent jet pipe is elliptic conic shape hole, elliptic cross-section major and minor axis ratio is between between 1.5:1 to 2.5:1, the flow area of through hole (opening at the macropore aperture of outer surface section area) is less than the flow area of through hole, and the passage medial axis of through hole is vertical with the medial axis of convergent jet pipe.
The duct of above-mentioned through hole is cylindrical, and the inwall of cylindrical bore have an edge and convergent V-type jet pipe cylindrical section cross section tangent.
The port outward edge of the negative throat noz(zle) of above-mentioned convergent jet pipe rear end is provided with 6 " V " type fins; And two air-flow jet pipes are set respectively between two V-type fins.
The circular groove of above-mentioned annular oriffice front-end face is mazy type circular groove; The circular groove of above-mentioned annular oriffice is also mazy type circular groove.
Above-mentioned inner walls outlet end offers annular groove, and annular groove, also have a colored type fold honeycomb duct that is installed on housing outlet end, this flower type fold honeycomb duct is by being installed on snap ring in the outlet of annular groove and being installed on snap ring in the location of annular groove and positioning.
Above-mentioned colored type fold honeycomb duct cross section is circular, 16 petal fold sheets, consists of; Each petal fold sheet end face is arc rib, and the end of arc rib is radially connected with two laminar body, and the laminar body of adjacent two petal fold sheets are connected by inner side arc rib; The radius of arc of arc rib is greater than the radius of arc of inner side arc rib; And petal fold sheet is flaring type structure along jet axial direction, and gradient is 1-2 °.
Above-mentioned shower nozzle by exterior edge face be provided with the semicircle end socket of perforate, canalis spinalis from Jet Axis to flaring and straight length along forms; And semicircle head opening area is not less than the perforated area of the large end of canalis spinalis; The Taper Pipe gradient of canalis spinalis is 5-7 °.
The present invention is directed to the flow field characteristic of High-speed Gas-jets under Water,, temperature high large for Gas Jet momentum, developed the multiple-phase jet denoising device that is applicable to submarine navigation device vent systems, and this apparatus structure is compact, can directly be installed in air outlet duct system, not take outer space.This denoising device is based on flow control principle, air-flow is entered to denoising device starts until air-flow is discharged the whole process that forms bubble controls, the combination of employing various structures, eliminate gas, rapid jet noise and bubble noise, the high frequency 5000Hz of noise reduction frequency range from pulsation low frequency 200Hz to rapid jet generation, noise reduction is more than 18dB.
Accompanying drawing explanation
Fig. 1 is general structure schematic diagram of the present invention.
Fig. 2 is the structural representation (Fig. 2 A stereogram, Fig. 2 B side view, Fig. 2 C sectional view) of housing.
Fig. 3 is the structural drawing (Fig. 3 A stereogram, Fig. 3 B front view) of flower type fold honeycomb duct.
Fig. 4 is the structural drawing (Fig. 4 A stereogram, Fig. 4 B sectional view) of porous nozzle.
Fig. 5 is the stereogram of convergent jet pipe.
Fig. 6 is the side view of convergent jet pipe.
Fig. 7 is the front elevation of convergent jet pipe.
Fig. 8 is the A-A sectional view (wherein through hole 15-c is cylindrical bore) of Fig. 6.
Fig. 9 is the A-A sectional view (wherein through hole 15-c is elliptic conic shape duct) of Fig. 6.
Figure 10 is the front view of annular oriffice.
Figure 11 is sectional view of the present invention.
Wherein, 1, housing, 1-a, through hole, 1-b, annular groove, 1-c, annular groove, 1-d, annular groove, 1-e, shoulder block, 1-f, shoulder block, 1-h, annular groove, 2, snap ring in outlet, 3, flower type fold honeycomb duct, 3-a, petal fold sheet, 3-b, arc rib, 4, snap ring in location, 5, rearmounted snap ring, 6, annular oriffice, 6-a, aperture, 6-b, aperture, 6-c, circular groove, 7, rearmounted jet pipe, 8, preposition jet pipe, 9, preposition snap ring, 10, blade, 11, inner catheter, 12, preposition fin, 13, rearmounted fin, 14, porous nozzle, 14-a, semicircle end socket, 14-b, canalis spinalis, 15, convergent V-type jet pipe, 15-a, V-type fin, 15-b, air-flow jet pipe, 15-c, through hole, 15-d, annular oriffice, 15-e, circular groove.
Embodiment
Below in conjunction with accompanying drawing, the present invention is elaborated:
In overall pattern shown in Fig. 1, have: snap ring 2, flower type fold honeycomb duct 3, the interior snap ring 4 in location, rearmounted snap ring 5, annular oriffice 6, rearmounted jet pipe 7, preposition jet pipe 8, preposition snap ring 9, blade 10, inner catheter 11, preposition fin plate 12, rearmounted fin tube 13, porous nozzle 14, convergent V-type jet pipe 15 in housing 1, outlet.
Housing 1 is the shell of multiple-phase jet noise eliminating silencer under water, in all parts are all wrapped in;
Flower type fold honeycomb duct 3 is installed on the outlet end of housing 1, by exporting snap ring 4 in interior snap ring 2 and location, positions;
Four corresponding circle eyelet weldings of the ring flat-plate leading flank of annular oriffice 6 connect rearmounted jet pipe 7, and annular oriffice 6 contacts with 5 of rearmounted snap rings, offer annular seal groove on surface of contact;
On the annulus orifice plate trailing flank of convergent V-type jet pipe 15 front ends, four corresponding circle eyelet weldings connect preposition jet pipe 8, and rearmounted jet pipe 7, preposition jet pipe 8 nozzle medial axis are consistent, and the orifice size of preposition jet pipe 8 is less than the diameter of rearmounted jet pipe 7;
Convergent V-type jet pipe 15 is fixed in housing 1 by preposition snap ring 9, and be positioned at the rear (take outlet end as rear end) of blade 10, blade 10 and convergent V-type jet pipe 15 spans (blade 10 is to the distance of annular oriffice 15-d) are not less than the diameter length of 1/2 housing 1;
Blade 10 is welded on the hoop of inner catheter 11, has 12 blades;
Convergent V-type jet pipe 15 is connected by four preposition fins 12 with inner catheter 11, porous nozzle 14 is connected by four rearmounted fins 13 with inner catheter 11, finally by preposition fin 12 and rearmounted fin 13, convergent V-type jet pipe 15, inner catheter 11 and porous nozzle 14 is coupled together.
Fig. 2 is the structural drawing of housing 1, and cylindrical shell 1 is offered 4 through hole 1-a at outer wall hoop; Through hole 1-a is elliptic cone hole structure, and the aperture size that housing 1 outer wall is corresponding is greater than the size that inwall is corresponding; Through hole 1-a aperture end face is shaped as ellipse, and major and minor axis ratio is between (being similar to the elliptic conic shape through hole 15-c of the jet pipe shown in Fig. 9) between 1.5:1 to 2.5:1; Housing 1 inwall is offered four annular groove 1-b, 1-c, 1-d, 1-h; Front end at annular groove 1-d is provided with shoulder block 1-e, in annular groove 1-h rear end, shoulder block 1-f is set.
Fig. 3 is the structural drawing of flower type fold honeycomb duct, and the structure of flower type fold honeycomb duct 3 is comprised of 16 petal fold sheet 3-a; Petal fold sheet 3-a exterior edge face is rounded edges 3-b, and rounded edges 3-b sectional shape is circular arc, larger near the rounded edges 3-b radius of arc of outer radius, less near the interior rounded edges radius of arc of inner radius; Petal fold sheet 3-a is flaring type structure along jet axial direction, and gradient is 1-2 °.
Fig. 4 is the structural drawing of porous nozzle, and porous nozzle 14 comprises semicircle end socket 14-a and canalis spinalis 14-b; Semicircle end socket 14-a perforated area is not less than the perforated area of the large end of canalis spinalis 14-b; The Taper Pipe gradient of canalis spinalis 14-b is 5-7 °.
Fig. 5-9th, the schematic diagram of convergent jet pipe.
Fig. 5 is stereogram, and Fig. 6 is side view, and Fig. 7 is front elevation, and Fig. 8,9 is the A-A sectional views in two kinds of different ducts.Convergent jet pipe 15 front ends are annular oriffice 15-d; In between the annulus of annular oriffice 15-d, have 4 apertures, orifice diameter is identical with preposition jet pipe 8 straight length diameters, offers many group apertures on the annular slab between aperture is adjacent;
As Fig. 9, convergent jet pipe 15 cylindrical section outer wall annulars are offered 4 elliptic conic shape through hole 15-c, elliptic cross-section major and minor axis ratio is between between 1.5:1 to 2.5:1, through hole 15-c duct and 15 cylindrical section internal faces are tangent, through hole 15-c overlaps with the center line of through hole 1-a at outer wall center, and the flow area of through hole 15-c is less than the flow area of through hole 1-a;
Or as Fig. 8, the duct of above-mentioned through hole 15-c is cylindrical, and the inwall of cylindrical bore have an edge and convergent V-type jet pipe 15 cylindrical section cross sections tangent, also be outermost apart from a nozzle axis edge farthest the radial direction in cylindrical section, and this edge and cylindrical section cross section tangent.
Convergent jet pipe 15 front ends have V-type negative throat noz(zle), and nozzle edge has 6 V-type fin 15-a, and two little airflow jet pipe 15-b are set between two V-type fin 15-a;
On annular oriffice 15-d, offer two mazy type circular groove 15-e.
When maze-type structure is immersed under water, liquid forms pendular ring in mazy type circular groove, plays low leakage seal action.Mazy type circular groove 15-e and shoulder block 1-f end contact, owing to having pendular ring in mazy type circular groove, in rotary course, have one deck liquid film between two faces of contact, plays the effect of rotary lubrication.
Figure 10 is the front view of annular oriffice 6, and the annular oriffice 15-d structure of its structure and convergent jet pipe 15 is similar.In between the annulus of annular oriffice 6, evenly have 4 aperture 6-a, offer many group aperture 6-b on the sector ring board between described aperture 6-a, two ring annular groove 6-c are offered in the annular oriffice 6 submarginal positions of front-end face; The circular groove 6-c of above-mentioned annular oriffice 6 is also mazy type circular groove.
Figure 11 is sectional view of the present invention, to demonstrate working principle of the present invention.
During High Temperature High Pressure waste gas process denoising device, in region I, air-flow is divided into two strands, and one air-flow is through blade 10, and one air-flow enters inner catheter 11;
Fluid force drive vane 10 rotations of the airflow function of process blade 10 on blade 10, because blade 10, inner catheter 11, porous nozzle 14, convergent V-type jet pipe 15, preposition jet pipe 8 all link together by different Placements, therefore above structure is rotated together;
The blade 10 air-flow portion of energy of flowing through act on blade rotary, speed and pressure decrease, aperture and preposition jet pipe 8 through annular oriffice 15-d enters in the II of region subsequently, the air-flow entering in preposition jet pipe 8 is injected in the negative throat noz(zle) of rearmounted jet pipe 7 correspondences through the nozzle of convergent, due at preposition jet pipe 8, airspeed between rearmounted jet pipe 7 nozzles is larger, pressure is lower than the ambient pressure of housing 1, extraneous seawater offers 4 cavitys in through hole 1-a inflow region II on housing 1, due to inside and outside differential pressure effect, the seawater that enters cavity has certain initial velocity, the duct of this cavity seawater part via through holes 15-c enters convergent V-type jet pipe 15 inwalls, through hole 15-c of the present invention can adopt two kinds of structures shown in Fig. 8 or Fig. 9,
When through hole 15-c adopts the cylinder type Tangential Channel shown in Fig. 8, its structural advantage is that liquid enters after structure 15, due to through hole 15-c and inwall tangent, and the rotation of convergent V-type jet pipe 15, the seawater entering in convergent V-type jet pipe 15 rotates with tube wall, can form liquid film at the internal face of convergent jet pipe 15, near the seawater generation heat exchange of the gas that enters convergent V-type jet pipe 15 wall; Therefore not only can reduce gas temperature, also can form liquid film boundary layer at the edge of 15-a, reduce this place's spray gas flow jet intensity.
When through hole 15-c adopts the elliptic conic shape passage perpendicular to convergent jet pipe 15 axis, its structural advantage is that liquid enters after structure convergent jet pipe 15, liquid enters the center region of 15 air-flows of flowing through, because oval-shaped passageway is conducive to liquid film fragmentation, therefore the close central axis annex in convergent jet pipe 15 passages forms a large amount of droplets, these droplets momentum under action of high-speed airflow increases, not only reduce the gas flow temperature in convergent jet pipe 15 pipes, also reduced the air-flow tubulence energy intensity in convergent jet pipe 15 pipes simultaneously.
The air-flow that enters inner catheter 11 partly penetrates through the hole of porous nozzle 14, forms micropore jet, due to porous nozzle 14 cavity body structures, can eliminate gas; Part air-flow enters in convergent V-type jet pipe 15 through inner catheter 11 and the flaring passage before porous nozzle 14, together with converging to, cooling blast in convergent V-type jet pipe 15 sprays through V-type fin 15-a, the fluid section of the region II of flowing through enters in air-flow jet pipe 15-b, and inject and converge in air-flow, V-structure in conjunction with V-type fin 15-a, inside and outside air-flow and extraneous seawater blending are violent, jet core region reduces, and formed a large amount of small bubble with seawater blending near nozzle, reduced the two phase flow noise of gas jet in water;
Together with the fluid of region II and III converges to, enter region IV, and inject in seawater through flower type fold honeycomb duct 3, due to petal fold sheet 3-a shaped flat, seawater and bubble interact in long and narrow passage, and a large amount of fluid energies has dissipated.
Originally directly the high pressure-temperature waste gas of discharge has not only reduced temperature after denoising device, also can eliminate pulsation simultaneously, reduces jet intensity, when flowing through every section of region of device, segmentation dissipation energy, has reduced gas simultaneously and has injected the bubble volume in water, effectively controls submerged jet noise.
Claims (8)
1. a multiple-phase jet noise eliminating silencer under water, is characterized in that this device comprises the cylindrical housings (1) of a tubulose, and this housing (1) is evenly offered 4 through holes (1-a) at outer wall hoop;
Above-mentioned through hole (1-a) is elliptic conic shape through hole, and the size in outer wall aperture is greater than the size in inwall aperture; And the inside and outside aperture of ellipse hole (1-a) end face is shaped as ellipse, and major and minor axis ratio is between between 1.5:1 to 2.5:1;
The inwall that is positioned at both sides, through hole (1-a) front and back at housing (1) is offered two annular grooves (1-h, 1-d);
In annular groove (1-h) rear end, shoulder block (1-f) is set, at the front end of (1-d), is provided with shoulder block (1-e);
In described housing (1), be fixed with convergent jet pipe (15), this convergent jet pipe (15) front end is that annular oriffice (15-d), middle part are that cylindrical section, rear end are negative throat noz(zle), and described annular oriffice (15-d) is arranged between above-mentioned annular groove (1-h) and shoulder block (1-f);
Described cylindrical section outer wall hoop is evenly offered 4 through holes (15-c), and lays respectively at the below of above-mentioned ellipse hole (1-a) internal face;
In between the annulus of annular oriffice (15-d), evenly have 4 apertures (15-g), on the sector ring board between aperture (15-g), offer many group apertures (15-f);
The medial axis of described 4 through holes (1-a) and the medial axis of 4 through holes (15-c) are positioned on the same cross section radially of this device;
On the end face that annular oriffice (15-d) contacts with shoulder block (1-f), offer two ring annular grooves (15-e),
The side of described aperture (15-g) towards rear end is connected with respectively preposition jet pipe (8), and the straight length diameter of this preposition jet pipe (8) is identical with aperture (15-g) diameter, and straight length rear end is connected with negative throat noz(zle);
Between annular groove (1-d) and shoulder block (1-e), annular oriffice (6) is installed, the inner ring sleeve of this annular oriffice (6) is put the rear end at described convergent jet pipe (15); In between the annulus of annular oriffice (6), evenly have 4 apertures (6-a), on sector ring board between described aperture (6-a), offer many group apertures (6-b), on the end face that annular oriffice (6) contacts with shoulder block (1-e), offer two ring annular grooves (6-c);
Described aperture is connected with respectively rearmounted jet pipe (7) towards a side of front end, and the straight length diameter of this postposition jet pipe (7) is identical with orifice diameter, and straight length front end is connected with negative throat noz(zle); And rearmounted jet pipe (7) has same axis with one of them preposition jet pipe (8), and the orifice size of preposition jet pipe (8) is less than the diameter of rearmounted jet pipe (7);
On the axis of described housing (1), there is inner catheter (11) via preposition fin (12), to be fixed on the inwall of convergent jet pipe (15), the front portion of this inner catheter (11) is provided with blade (10), on the inwall of inner catheter (11) outlet end, via rearmounted fin (13), is fixed with a porous nozzle (14);
And there are preposition snap ring (9) and rearmounted snap ring (5) to be installed on respectively in above-mentioned two annular grooves (1-h) and annular groove (1-d).
2. a kind of noise eliminating silencer of multiple-phase jet under water as claimed in claim 1, the through hole (15-c) that it is characterized in that the cylindrical section outer wall of above-mentioned convergent jet pipe (15) is elliptic conic shape hole, elliptic cross-section major and minor axis ratio is between between 1.5:1 to 2.5:1, the flow area of through hole (15-c) is less than the flow area of through hole (1-a), and the passage medial axis of through hole (15-c) is vertical with the medial axis of convergent jet pipe (15).
3. a kind of noise eliminating silencer of multiple-phase jet under water as claimed in claim 1, the duct that it is characterized in that above-mentioned through hole (15-c) is cylindrical, and the inwall of cylindrical bore have an edge and convergent V-type jet pipe (15) cylindrical section cross section tangent.
4. a kind of noise eliminating silencer of multiple-phase jet under water as claimed in claim 1, is characterized in that the port outward edge of the negative throat noz(zle) of above-mentioned convergent jet pipe rear end is provided with 6 " V " type fins (15-a); And two air-flow jet pipes (15-b) are set respectively between two V-type fins (15-a).
5. a kind of noise eliminating silencer of multiple-phase jet under water as claimed in claim 1, is characterized in that the circular groove (15-e) of above-mentioned annular oriffice (15-d) front-end face, is mazy type circular groove; The circular groove (6-c) of above-mentioned annular oriffice (6) is also mazy type circular groove.
6. a kind of noise eliminating silencer of multiple-phase jet under water as claimed in claim 1, it is characterized in that above-mentioned housing (1) inwall outlet end offers annular groove (1-b), and annular groove (1-c), also have a colored type fold honeycomb duct (3) that is installed on housing (1) outlet end, this flower type fold honeycomb duct (3) positions by being installed on the interior snap ring (2) of outlet of annular groove (1-b) and being installed on snap ring (4) in the location of annular groove (1-c).
7. a kind of noise eliminating silencer of multiple-phase jet under water as claimed in claim 6, is characterized in that above-mentioned colored type fold honeycomb duct (3) cross section is circular, is comprised of 16 petal fold sheets (3-a); Each petal fold sheet (3-a) end face is arc rib (3-b), and the end of arc rib (3-b) is radially connected with two laminar body, and the laminar body of adjacent two petal fold sheets (3-a) are connected by inner side arc rib; The radius of arc of arc rib is greater than the radius of arc of inner side arc rib; And petal fold sheet (3-a) is flaring type structure along jet axial direction, and gradient is 1-2 °.
8. a kind of noise eliminating silencer of multiple-phase jet under water as claimed in claim 1, it is characterized in that above-mentioned shower nozzle (14) by exterior edge face be provided with the semicircle end socket (14-a) of perforate, canalis spinalis (14-b) from Jet Axis to flaring and straight length along forms; And semicircle end socket (14-a) perforated area is not less than the perforated area of the large end of canalis spinalis (14-b); The Taper Pipe gradient of canalis spinalis (14-b) is 5-7 °.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104179557A (en) * | 2014-06-28 | 2014-12-03 | 山东省科学院海洋仪器仪表研究所 | Elliptic taper pore channel type underwater multiphase jet flow muffling noise reduction device |
| CN112196653A (en) * | 2020-10-12 | 2021-01-08 | 六安科亚信息科技有限公司 | Non-linear automobile exhaust pipe with inner wall self-cleaning function |
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