CN202754137U - Low-noise sea chest - Google Patents
Low-noise sea chest Download PDFInfo
- Publication number
- CN202754137U CN202754137U CN 201220289148 CN201220289148U CN202754137U CN 202754137 U CN202754137 U CN 202754137U CN 201220289148 CN201220289148 CN 201220289148 CN 201220289148 U CN201220289148 U CN 201220289148U CN 202754137 U CN202754137 U CN 202754137U
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- accent
- division board
- cavity
- partition plate
- vertical
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- Withdrawn - After Issue
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Abstract
The utility model aims at providing a low-noise sea chest which comprises a cavity body, an inclined upper cover, a partition plate and a rotary box body cavity opening. The cavity body is connected with the inclined upper cover, an inner bottom plate is arranged at the bottom of the cavity body, the inner bottom plate is connected with the rotary box body cavity opening, and a concave grid sheet is arranged in the rotary box body cavity opening. The partition plate comprises a longitudinal partition plate and a vertical cavity opening partition plate, wherein the longitudinal partition plate and the vertical cavity opening partition plate are fixed on the inner bottom plate, rows of gas-liquid partition holes are arranged on the partition plate, and the cross sections of the gas-liquid partition holes on the vertical cavity opening partition plates are perpendicular to the water flow direction. A venting hole is arranged at the upper end of the cavity body, a seawater main pipe suction port is arranged at the lateral end of the cavity body, and the height of the venting port is higher than the sea level. The low-noise sea chest is simple in structure, good in economy, strong in practicability and complete in application functions.
Description
Technical field
The utility model relates to a kind of suction box of vibration radiation field of noise control.
Background technology
Suction box is usually located in stem, the ship and the bottom of stern, is that size approximately 1 meter square inside is equipped with the casing of water.It provides cooling water mainly for the main and auxiliary diesel engine of boats and ships, and fire demand water, pressure are cut a water, and wash water etc.It is one of main lifeblood of boats and ships, is directly connected to normal operation, crewman and the passenger's of boats and ships normal life and boats and ships and personal safety problem.Along with the Underwater Detection equipment improves, the noise of boats and ships and reliability requirement are also constantly improving at present, and for ensureing that boats and ships are long-term, normal operation, the design of low noise suction box structure is very necessary.
Suction box belongs to the cavity body structure of sinking type, when seawater flows through cavity body structure, can produce the stream Induced Oscillation phenomenon of whirlpool, fluid at the accent place, stream Induced Oscillation problem is a kind of time-dependent Fluid Flow in A, in this process, both comprised the separation of shearing laminar flow, generation and the evolution of swirling motion are arranged again, and they are simultaneous.Also be accompanied by simultaneously wave propagation and acoustic pressure forced oscillation, radiation of sound occurs.Because valve box structure directly links to each other with outer smoothness, between do not have impedance structure, sound wave directly is radiated in the water, makes the ship noise raising.Gu produce simultaneously stream-coupling, cause cavity body structure to destroy and endurance failure.Therefore suppress the stream Induced Oscillation of suction box, significant to boats and ships.
At present, the suction box that various ships adopts is the sea suction valve space of arranging alow, and the sea water pump that is used for main condenser sucks, and also has fire and general service pump, bilge water fire pump house steward.The position of suction box is to decide according to seawater house steward's position, and seawater house steward's position is to decide according to the layout of main frame.The seawater pipe should be tried one's best near the machine band sea water pump of main frame, the general place of close outside plate on the quarter.Spelter inside is housed makes the protection anode, the outside is equipped with grid and is prevented that rubbish from entering saltwater system.Be laid with mud hole (discharge orifice) in the clack box bottom in addition, breather hole is arranged at top.Such suction box is when ship rolling, and case maritime interior waters free surface rocks seriously, and fluid guide margin shear layer exsomatizes and produces whirlpool, stream Induced Oscillation phenomenon, and is unfavorable to stability of ship and sound stealth.The fixed type accent can't change the incoming flow angle of attack in good time with the change of ship course, cause flow separation phenomenon serious.
Summary of the invention
It is simple in structure that the purpose of this utility model is to provide, and both satisfied economy, satisfies again the low noise suction box of practicality.
The purpose of this utility model is achieved in that
The utility model low noise suction box, it is characterized in that: comprise cavity, the inclination loam cake, division board, the rotating box accent, cavity links to each other with the inclination loam cake, cavity is gone to the bottom and is tank top plate, tank top plate connects the rotating box accent, inner concave shape grid sheet is installed in the rotating box accent, division board comprises vertical division board and vertical accent division board, vertically division board is fixed on the tank top plate with vertical accent division board, gas-liquid separation hole in a row is set on the division board, and the cross-sectional plane in gas-liquid separation hole is perpendicular to water (flow) direction on the vertical accent division board, and the cavity upper end arranges air extractor vent, the cavity side arranges seawater house steward suction inlet, and the height of vent is higher than the sea level.
The utility model can also comprise:
1, also comprise rotary flange, tank top plate connects the rotating box accent by rotary flange, and the rotating box accent can be rotated by rotary flange.
2, described inclination loam cake and cavity side angulation are 45 degree.
Advantage of the present utility model is: the utility model is simple in structure, good economy performance, practical, application function is perfect.
Description of drawings
Fig. 1 is front elevation of the present utility model;
Fig. 2 is lateral plan of the present utility model;
Fig. 3 is locations of structures arrangement plan of the present utility model.
The specific embodiment
For example the utility model is described in more detail below in conjunction with accompanying drawing:
In conjunction with Fig. 1～3, all may arrange the suction box structure in boats and ships bow, middle part, stern both sides, take amidships topside typical case suction box structure as example, by reference to the accompanying drawings the utility model is described in more detail:
Inner concave shape grid sheet 9 is connected with rotating box accent 5 by bearing pin, is convenient to dismounting; Division board 3,4 is welded on the tank top plate; Arrange gas-liquid separation hole 7 in a row at division board; Loam cake 6 angles of inclination, inclination top are 45 °, guarantee that vent 1 is higher than the sea level; Rotating box accent 5 links to each other by rotary flange 8 with cavity.
Current are by detouchable inner concave shape grid sheet 9, pass through band hole vertical cavity mouth division board by accent 5, aperture disperses current and is separated into some draining posts, rise along fore and aft diaphragm 3 water levels with holes, underwater bubble is stopped, pools air pocket by the gas-liquid separation mouth, rise along inclination top loam cake 6, discharge the suction box casing until be higher than the vent 1 on sea level, seawater then flows into junctor band pump seawater house steward sucker 2, and the rotary flange 8 that links to each other with control system according to different courses, the in good time adjustment of sea situation changes the angle of attack.Finally reach the purpose of noise decrease, additional resistance.
1, construction parameter is chosen
According to division board position with holes, rotating box accent direction chamber type, the incoming flow angle of attack, shear layer are separated and swirling motion affect rule, select optimum low noise suction box parameter, design only inner concave shape grid shape.
2, arrange that vertical division board changes the chamber type
At first according to the low noise suction box cavity structure parameter that obtains, select the division board position.Down-flowing incoming direction division board in suction box is divided into some little spaces with suction box, reduces free surface and rocks rolling; Clack box is divided into little casing, and making cavity body structure is the dark chamber of deeply striding than large, controls or eliminate disadvantageous stream Induced Oscillation.Instruct the positional structure design of division board by it being carried out simulation calculation, make its flow field shear layer even, gradient is little.The certain altitude space is left with the clack box upper wall in the division board upper end, guarantees the passage of seawater.1/3 place, division board bottom lays aperture in a row, is used for stopping that the minute bubble that is mixed in the seawater flows into the pump band.
3, install inner concave shape grid sheet additional
In order to prevent that sea grass, the sea fouling products such as whetstone from entering grid or the orifice plate in the clack box in the case mouth.By designing suitable grid indent molded line, strengthen the area of contact of accent and seawater.The characteristic that dynamic head increased when concave inward structure took full advantage of the ship sailed onward increases seawater flow.With the pivot pin device inner concave shape grid is connected with bottom plating, is convenient to dismounting, remove contamination.The existence of accent place grid, so that case mouth place wall increases, the existence of grid sheet has suppressed the vibration of shear layer, thereby reduces radiated noise.
4, adopt clack box inclination loam cake
The loam cake of suction box adopts incline structure, and angle is decided to be 45 °, and the water inlet direction is low, and the water outlet direction is high, links to each other with vent at highest point.Vent will be higher than the seawater Free Planar, makes in the seawater bubble discharge smoothly the clack box space.Make underwater bubble directly enter vent along the inclination loam cake, be conducive to gas-liquid separation, reduce bubble and flow into the pump band.
5, rotating box accent structure
For ease of regulating the variation of the incoming flow angle of attack, subsideing the chamber and the bottom plating contact position is furnished with rotatable flange.The fluctuating force at accent guide margin and lagging edge place reduced to some extent when the angle of attack was 45 °, and the fluctuating force of side-walls weakens, for etc. the pulsating pressure in the high pitched tune chamber reduce more obvious.Therefore in good time in ship course and seawater incoming flow, by the control setup that links to each other with rotary flange, rotating box accent position, the change angle of attack reduces to flow the Induced Oscillation noise.
Rotation accent direction can be regulated the flow of controlling seawater.Control setup links to each other with rotary flange, by driving device, can change the accent incoming flow angle of attack at control cabin, reach regulate accent place seawater flow, than the purpose of rill Induced Oscillation noise.
Claims (3)
1. low noise suction box, it is characterized in that: comprise cavity, the inclination loam cake, division board, the rotating box accent, cavity links to each other with the inclination loam cake, cavity is gone to the bottom and is tank top plate, tank top plate connects the rotating box accent, inner concave shape grid sheet is installed in the rotating box accent, division board comprises vertical division board and vertical accent division board, vertically division board is fixed on the tank top plate with vertical accent division board, gas-liquid separation hole in a row is set on the division board, and the cross-sectional plane in gas-liquid separation hole is perpendicular to water (flow) direction on the vertical accent division board, and the cavity upper end arranges air extractor vent, the cavity side arranges seawater house steward suction inlet, and the height of vent is higher than the sea level.
2. low noise suction box according to claim 1 is characterized in that: also comprise rotary flange, tank top plate connects the rotating box accent by rotary flange, and the rotating box accent can be rotated by rotary flange.
3. low noise suction box according to claim 1 is characterized in that: described inclination loam cake and cavity side angulation are 45 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220289148 CN202754137U (en) | 2012-06-19 | 2012-06-19 | Low-noise sea chest |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220289148 CN202754137U (en) | 2012-06-19 | 2012-06-19 | Low-noise sea chest |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202754137U true CN202754137U (en) | 2013-02-27 |
Family
ID=47733333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220289148 Withdrawn - After Issue CN202754137U (en) | 2012-06-19 | 2012-06-19 | Low-noise sea chest |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202754137U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102765469A (en) * | 2012-06-19 | 2012-11-07 | 哈尔滨工程大学 | Low-noise sea chest |
| CN109569076A (en) * | 2019-01-25 | 2019-04-05 | 苏州飞驰环保科技股份有限公司 | Utilize the structure of cooling water channel cleaning sea water tank water inlet block outside host |
-
2012
- 2012-06-19 CN CN 201220289148 patent/CN202754137U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102765469A (en) * | 2012-06-19 | 2012-11-07 | 哈尔滨工程大学 | Low-noise sea chest |
| CN102765469B (en) * | 2012-06-19 | 2014-10-22 | 哈尔滨工程大学 | Low-noise sea chest |
| CN109569076A (en) * | 2019-01-25 | 2019-04-05 | 苏州飞驰环保科技股份有限公司 | Utilize the structure of cooling water channel cleaning sea water tank water inlet block outside host |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130227 Effective date of abandoning: 20141022 |
|
| RGAV | Abandon patent right to avoid regrant |