CN200997679Y

CN200997679Y - Acoustically-transparent dome

Info

Publication number: CN200997679Y
Application number: CN 200620157458
Authority: CN
Inventors: 王远; 郭林发; 梅启勇
Original assignee: ZHONGCHUAN HEAVY INDUSTRY HAISHENG SCIENCE-TECHNOLOGY Co Ltd
Current assignee: ZHONGCHUAN HEAVY INDUSTRY HAISHENG SCIENCE-TECHNOLOGY Co Ltd
Priority date: 2006-11-20
Filing date: 2006-11-20
Publication date: 2007-12-26
Anticipated expiration: 2016-11-20

Abstract

An acoustic-permeability kuppe is composed of a kuppe body (1), which is made of the polyurethane rubber, and is the subelliptical ball shape, of which the horizontal cross section is a circle with gradually increased radius from the top of the kuppe body (1) to the opening part. A transverse stiffener (2) and a longitudinal stiffener (3) are arranged in intercross in the kuppe body (1).

Description

The entrant sound kuppe

Technical field

The utility model relates to a kind of parts of underwater installation acoustic array, particularly a kind ofly is made up of polyurethane rubber and reinforcement, can satisfy broadband underwateracoustic basic matrix performance requirement entrant sound kuppe.

Background technology

Kuppe is the vitals of underwater installation acoustic array.The purposes of kuppe main one is the protection transducer, the 2nd, and acoustic array flow noise when reducing to navigate by water.The general requirement of kuppe is: (1) has good sound translative performance, and the transducer directivity is not caused distortion (the insertion loss of trying one's best little); (2) resistance to vibration that satisfies the requirement of the regulation speed of a ship or plane is arranged; (3) good line style is arranged.From kuppe-analysis of transducer interaction parameter as can be known, make kuppe satisfy the regulation requirement, acoustic array performance and kuppe cover membrane material density, thickness and transducer operating frequency are in close relations, under the certain situation of transducer frequency, improve the kuppe performance, just should adopt low-density material, make the kuppe acoustic characteristic impedance as far as possible near seawater, kuppe thickness is as far as possible little.So selecting the design of suitable kuppe material and version is the key factor that can the kuppe design meet the demands.Kuppe mostly was reinforced composite (fiberglass) and stainless steel material in the past.The sound translative performance of fiberglass is better than fiberglass, but because the fiberglass kuppe mostly is hand pasting forming, guarantees the uniformity of its thickness and do not produce bubble to have big difficulty, and the bubble that produces the acoustical behavior of kuppe is influenced is very big; Though secondly the density of fiberglass is littler than stainless steel, being close to is the twice of water, and its internal acoustic field environment is also comparatively complicated.Because stainless steel material density is higher, little to the requirement of cover film thickness, too small thickness and cause stainless steel diversion cover surface rigidity very poor, the internal acoustic field of stainless steel diversion cover is more complicated than fiberglass simultaneously

Summary of the invention

The purpose of this utility model provides the entrant sound kuppe that a kind of acoustical behavior satisfies the new material of underwater installation acoustic array index request.

The purpose of this utility model is achieved in that a kind of entrant sound kuppe, comprise pod body 1, pod body 1 adopts polyurethane rubber to make, be shaped as semielliptical, its horizontal cross-section is the gradually big circle of radius from pod body 1 top to peristome, is provided with cross one another transverse stiffener 2 and vertical stiffener 3 in pod body 1.Transverse stiffener 2 and vertical stiffener 3 adopt band steels to make, and the pod body of being made by polyurethane 1 coats.

Entrant sound kuppe provided by the utility model, adopted polyurethane rubber as main body, auxiliary structure with stiffener is because polyurethane rubber has lower density, its acoustic characteristic impedance is close to consistent with seawater, so adopt polyurethane rubber to have significantly advantage as kuppe.(1) has good sound translative performance; (2) because it is soft, thus when making kuppe with it, under the situation of sound wave bombardment or sea slap, its stressed than the rigidity cover be little, thereby reduced the kuppe breakage that causes by impact; (3) when the speed of a ship or plane is higher, the noise of kuppe mainly is to be caused by the disturbance of covering outer fluid, these disturbances cause the flexural vibrations of cover film, as compressional wave, be delivered to the kuppe the inside by water, because rubber is a kind of damping material, just can reduce the noise that kuppe self takes place so make kuppe with rubber; (4) rubber has less modulus of elasticity, and the high frequency waves that the partial water turmoil causes will promptly be lost energy by the loss of the shear in the rubber, and low frequency wave also will promptly be lost energy by the reflection on cover border, so rubber cover can improve signal to noise ratio; (5) rubber have self-cleaning, anticorrosion, characteristic such as do not pollute; (6) the rubber kuppe is easy to moulding, and good process means can effectively suppress the generation of bubble; (7) adopt band steel as stiffener, the spacing of stiffener rationally is set, can effectively reduce the insertion loss of kuppe; (8) stiffener is coated in the polyurethane rubber, and the noise that its self-vibration produces greatly reduces.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.

Fig. 1 is a structural representation of the present utility model.

Embodiment

The utility model adopts following structure: a kind of entrant sound kuppe, comprise pod body 1, pod body 1 adopts polyurethane rubber to make, be shaped as semielliptical, its horizontal cross-section is the gradually big circle of radius from pod body 1 top to peristome, is provided with cross one another transverse stiffener 2 and vertical stiffener 3 in pod body 1.Transverse stiffener 2 and vertical stiffener 3 adopt band steels to make, and the pod body of being made by polyurethane 1 coats.

Pod body 1 is shaped as semielliptical in the utility model, and cross sectional shape is not isometrical circle, can reduce the acoustic waveform distortion, improves signal to noise ratio:

This device under the prerequisite that satisfies rigidity intensity, reduces the physical dimension of member as far as possible during design when making, especially in the size of acoustic radiation direction; The layout of transverse stiffener 2 is avoided the transducer radiating surface; Vertically the quantity of stiffener 3 is few as far as possible, can be uniform, because high-frequency transducer is at pod body 1 tip position, vertically stiffener 3 does not extend to the top; Adopt the distortion of proprietary frock and Heat Treatment Control stiffener during welding.

Pod body 1 adopts the mode of a form of mould, the temperature-time of control perfusion, and the flowability of reinforcement rubber produces to avoid too much bubble.

Claims

1, a kind of entrant sound kuppe, comprise pod body (1), it is characterized in that: pod body (1) adopts polyurethane rubber to make, be shaped as semielliptical, its horizontal cross-section is the gradually big circle of radius from pod body (1) top to peristome, is provided with cross one another transverse stiffener (2) and vertical stiffener (3) in pod body (1).

2, entrant sound kuppe according to claim 1 is characterized in that: transverse stiffener (2) and vertical stiffener (3) adopt band steel to make, and are coated by the pod body of being made by polyurethane (1).