阅读说明：本技术 一种船舶机舱风机降噪结构及安装方法 (Noise reduction structure of ship engine room fan and installation method ) 是由 王成 黄光兵 于 2020-10-19 设计创作，主要内容包括：本发明公开了一种船舶机舱风机降噪结构及安装方法；所述船舶机舱风机降噪结构包括设置在船舶机舱内的结构风道、竖立设置在船舶机舱甲板上且连通所述结构风道的风道管、设置在所述风道管上方的风机、连接在所述风机与所述风道管之间进风通道,所述进风通道由依次连接在所述风机与所述风道管之间的过渡安装板、弹性伸缩管和防火风闸所组成,在所述船舶机舱甲板上位于所述进风通道的外围沿周向竖立设置有若干数量的支架,在所述支架与所述过渡安装板之间设置隔振器。本发明可以有效降低风机噪音风对船舶机舱的影响。(The invention discloses a noise reduction structure of a ship engine room fan and an installation method; structure of making an uproar falls in marine engine room fan is including setting up the structure wind channel in marine engine room, erectting the setting on marine engine room deck and intercommunication the wind channel pipe, the setting in structure wind channel are in the fan, the connection of wind channel pipe top the fan with inlet air duct between the wind channel pipe, inlet air duct is by connecting gradually the fan with transition mounting panel, the flexible pipe of elasticity and fire prevention air brake between the wind channel pipe constitute marine engine room on-board is located inlet air duct's periphery is erect along circumference and is provided with the support of a plurality of quantity the support with set up the isolator between the transition mounting panel. The invention can effectively reduce the influence of the noise wind of the fan on the ship engine room.)

1. The utility model provides a structure of making an uproar falls in marine engine room fan, its characterized in that, including setting up the structure wind channel in marine engine room, erect the setting on marine engine room deck and communicate the wind channel pipe, the setting in structure wind channel are in the fan of wind channel pipe top, connect the fan with inlet air duct between the wind channel pipe, inlet air duct is by connecting gradually the fan with transition mounting panel, the flexible pipe of elasticity and fire prevention air brake between the wind channel pipe constitute marine engine room on-board is located inlet air duct's periphery is erect along circumference and is provided with the support of a plurality of quantity the support with set up the isolator between the transition mounting panel.

2. The noise reduction structure for the marine engine room fan is characterized in that the elastic extension tube comprises an upper rubber flange, a lower rubber flange and a drum-shaped rubber tube connected between the upper rubber flange and the lower rubber flange, rigid flange rings are respectively connected to the back faces of the upper rubber flange and the lower rubber flange, and the elastic extension tube fixes the upper rubber flange on the fan flange of the fan and fixes the lower rubber flange on the air brake flange of the fireproof air brake through a connecting bolt and the rigid flange rings.

3. The noise reduction structure of the marine engine room fan as claimed in claim 1, wherein the vibration isolator is a BE type rubber vibration isolator.

4. The noise reduction structure of the marine engine room fan is characterized in that the BE-type rubber vibration isolator comprises a metal shell, a metal core arranged in the metal shell, and a rubber body connected between the metal shell and the metal core, wherein the metal shell is connected with the bracket, and the metal core is connected with the transition mounting plate.

5. The noise reduction structure of the marine engine room fan as claimed in claim 4, wherein the BE type rubber vibration isolator is provided with a vibration isolation frequency fine adjustment device, and the vibration isolation frequency fine adjustment device comprises an expansion sleeve arranged at the lower end of the metal core, a conical tension disc arranged in an inner taper hole of the expansion sleeve, and an adjusting bolt connected between the conical tension disc and the metal core for fine adjustment of vibration isolation frequency.

6. The noise reduction structure of the marine engine room fan as claimed in claim 5, wherein a plurality of open slots are axially formed in the expansion sleeve.

7. The noise reduction structure for the marine engine room fan as claimed in claim 5, wherein a through internal threaded hole is formed on the central axis of the metal core, and an upper threaded end of the adjusting bolt is connected to the internal threaded hole; the lower end of the metal shell is provided with a hollow space which can be used for operating the adjusting bolt, and the bolt head at the lower part of the adjusting bolt is positioned in the hollow space.

8. The noise reduction structure of the marine engine room fan as claimed in claim 6, wherein a locking piece is arranged between the adjusting bolt and the conical tension disc; an anti-rotation pin is arranged on the outer conical surface of the conical tensioning disc and is in sliding fit with the open slot; and a belleville spring assembly is arranged between the conical tensioning disc and the metal core.

9. A method for installing a noise reduction structure of a marine engine room fan according to any one of claims 1 to 8, comprising the steps of:

(1) installation of the fan and the vibration isolation device: installing a support serving as a vibration isolation device and a BE type rubber vibration isolator connected with the support on a deck of a ship cabin, connecting the lower end of a fireproof air brake with an air duct pipe of the deck of the ship cabin, sequentially installing a transition mounting plate and an elastic telescopic pipe on a fan flange at the lower end of a fan, integrally hoisting the fan to the BE type rubber vibration isolator arranged on the support, fixing the BE type rubber vibration isolator and the transition mounting plate by using screws, and connecting the lower end of the elastic telescopic pipe with the upper end of the fireproof air brake;

(2) starting a fan and testing noise: arranging a noise tester at a preset position of a ship engine room, and starting a fan to perform noise test;

(3) fine adjustment of vibration isolation frequency: finely adjusting the vibration isolation frequency by rotating an adjusting bolt on the BE type rubber vibration isolator, observing the change condition of the noise value measured by a noise tester, and adjusting the noise value to BE minimum by adjusting the adjusting bolt; after the adjustment is completed, the lock tongue of the anti-loosening locking piece is turned over and attached to the side face of the hexagonal head of the adjusting bolt, so that the adjusting bolt is locked.

Technical Field

The invention relates to the technical field of ship design and manufacture, in particular to a noise reduction structure of a ship cabin fan and an installation method.

Background

4 cabin fans of the 40000 ton self-unloading ship are arranged in a left fan room and a right fan room, the fans are connected with a lower fireproof air brake through a flange, the fireproof air brake is connected with a lower structural air pipe through the flange, and the structural air pipe is arranged on a deck. When noise calculation is carried out, the fact that the fan and the accessories below the fan are rigidly connected through the same medium when the fan works normally is found, noise of the fan is transmitted to a part of cabins of a deck to be high, and the noise of the part of cabins exceeds the standard.

In order to solve the above problems, it is necessary to perform vibration isolation treatment on the fan to reduce the noise rigidly transmitted when the fan is operated.

Disclosure of Invention

In order to solve the problems, the invention provides a noise reduction structure of a ship cabin fan and an installation method thereof, and aims to reduce the influence of noise wind of the fan on the ship cabin. The specific technical scheme is as follows:

the utility model provides a structure of making an uproar falls in marine engine room fan, includes the structure wind channel that sets up in marine engine room, erects the setting and just communicates on marine engine room deck the wind channel pipe in structure wind channel, set up the fan of wind channel pipe top, connect the fan with inlet air channel between the wind channel pipe, inlet air channel is by connecting gradually the fan with transition mounting panel, the flexible pipe of elasticity and fire prevention air brake between the wind channel pipe constitute marine engine room on-board is located inlet air channel's periphery is erect along circumference and is provided with the support of a plurality of quantity the support with set up the isolator between the transition mounting panel.

Preferably, the fans are arranged in a left fan room and a right fan room of the ship, and two fans are arranged in each fan room.

The invention discloses a fireproof air brake system, which comprises an elastic extension pipe and a fireproof air brake, wherein the elastic extension pipe comprises an upper rubber flange, a lower rubber flange and a drum-shaped rubber pipe connected between the upper rubber flange and the lower rubber flange, rigid flange rings are respectively connected to the back sides of the upper rubber flange and the lower rubber flange, the upper rubber flange is fixed on a fan flange of a fan through a connecting bolt and the rigid flange rings, and the lower rubber flange is fixed on an air brake flange of the fireproof air brake.

Preferably, the vibration isolator is a BE type rubber vibration isolator.

Preferably, the BE type rubber vibration isolator comprises a metal shell, a metal core arranged in the metal shell, and a rubber body connected between the metal shell and the metal core, wherein the metal shell is connected with the bracket, and the metal core is connected with the transition mounting plate.

As a further improvement of the invention, the BE type rubber vibration isolator is provided with a vibration isolation frequency fine adjustment device, and the vibration isolation frequency fine adjustment device comprises a section of expansion sleeve arranged at the lower end of the metal core, a conical tension disc arranged in an inner conical hole of the expansion sleeve, and an adjusting bolt connected between the conical tension disc and the metal core and used for fine adjustment of vibration isolation frequency.

In the invention, a plurality of open slots are axially arranged on the expansion sleeve, so that the expansion sleeve part forms a split structure; when the adjusting bolt is rotated, the opening degree of the expansion sleeve of the split structure can be adjusted, so that the rigidity of the rubber body is changed, and the aim of finely adjusting the vibration isolation frequency is fulfilled.

Preferably, a through internal threaded hole is formed in the central axis of the metal core, and the upper threaded end of the adjusting bolt is connected to the internal threaded hole; the lower end of the metal shell is provided with a hollow space which can be used for operating the adjusting bolt, and the bolt head at the lower part of the adjusting bolt is positioned in the hollow space.

Preferably, an anti-loosening locking sheet is arranged between the adjusting bolt and the conical tensioning disc; an anti-rotation pin is arranged on the outer conical surface of the conical tensioning disc and is in sliding fit with the open slot; and a belleville spring assembly is arranged between the conical tensioning disc and the metal core.

A method for installing a noise reduction structure of a ship engine room fan comprises the following steps:

(1) installation of the fan and the vibration isolation device: installing a support serving as a vibration isolation device and a BE type rubber vibration isolator connected with the support on a deck of a ship cabin, connecting the lower end of a fireproof air brake with an air duct pipe of the deck of the ship cabin, sequentially installing a transition mounting plate and an elastic telescopic pipe on a fan flange at the lower end of a fan, integrally hoisting the fan to the BE type rubber vibration isolator arranged on the support, fixing the BE type rubber vibration isolator and the transition mounting plate by using screws, and connecting the lower end of the elastic telescopic pipe with the upper end of the fireproof air brake;

(2) starting a fan and testing noise: arranging a noise tester at a preset position of a ship engine room, and starting a fan to perform noise test;

(3) fine adjustment of vibration isolation frequency: finely adjusting the vibration isolation frequency by rotating an adjusting bolt on the BE type rubber vibration isolator, observing the change condition of the noise value measured by a noise tester, and adjusting the noise value to BE minimum by adjusting the adjusting bolt; after the adjustment is completed, the lock tongue of the anti-loosening locking piece is turned over and attached to the side face of the hexagonal head of the adjusting bolt, so that the adjusting bolt is locked.

The invention has the beneficial effects that:

firstly, according to the noise reduction structure and the installation method of the ship cabin fan, the BE type rubber vibration isolator is provided with the vibration isolation frequency fine adjustment device which is combined with noise reduction calculation, so that the noise reduction effect after the fan is installed can BE optimized to the maximum extent.

Secondly, according to the noise reduction structure of the marine engine room fan and the installation method of the noise reduction structure, the vibration isolator with the vibration isolation frequency fine adjustment device is simple in structure and good in reliability.

Thirdly, according to the noise reduction structure of the marine engine room fan and the installation method thereof, the vibration isolation frequency fine adjustment device can adjust the vibration isolation frequency in the vertical direction and the horizontal direction at the same time, so that the reduction or improvement of the bidirectional frequency is realized.

Drawings

FIG. 1 is a schematic view of a noise reduction structure for a marine nacelle fan of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 relating to the connection of a fan to the deck of a marine vessel;

FIG. 3 is a schematic structural view (bottom view) of the transition panel portion of FIG. 2;

figure 4 is a schematic structural view of the isolator of figure 2;

fig. 5 is a schematic layout (top view) of four fans on the deck of a ship's nacelle.

In the figure: 1. the structure air duct comprises a structure air duct body, 2, a ship cabin deck, 3, an air duct pipe, 4, a fan, 5, an air inlet channel, 6, a transition mounting plate, 7, an elastic telescopic pipe, 8, a fireproof air brake, 9, a support, 10, a vibration isolator, 11, an upper rubber flange, 12, a lower rubber flange, 13, a drum-shaped rubber pipe, 14, a rigid flange ring, 15, a connecting bolt, 16, a fan flange, 17, an air brake flange, 18, a metal shell, 19, a metal core, 20, a rubber body, 21, a vibration isolation frequency fine adjustment device, 22, an expansion sleeve, 23, a conical tension disc, 24, an adjusting bolt, 25, an open slot, 26, an internal thread hole, 27, a hollow space, 28, an anti-loosening locking sheet, 29, a vibration isolation device, 30, a screw, 31, an anti-rotation pin, 32 and a butterfly spring.

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

Example 1:

fig. 1 to 5 show an embodiment of a noise reduction structure for a ship cabin fan according to the present invention, which includes a structural air duct 1 disposed in a ship cabin, an air duct pipe 3 vertically disposed on a deck 2 of the ship cabin and communicated with the structural air duct 1, a fan 4 disposed above the air duct pipe 3, and an air intake channel 5 connected between the fan 4 and the air duct pipe 3, wherein the air intake channel 5 is composed of a transition mounting plate 6, an elastic extension tube 7, and a fireproof air gate 8 sequentially connected between the fan 4 and the air duct pipe 4, a plurality of brackets 9 are vertically disposed on the periphery of the air intake channel 5 on the deck 2 of the ship cabin along a circumferential direction, and a vibration isolator 10 is disposed between the brackets 9 and the transition mounting plate 6.

Preferably, the fans 4 are arranged in two left and right fan rooms of the ship, and two fans 4 are arranged in each fan room.

In this embodiment, the elastic extension tube 7 includes an upper rubber flange 11, a lower rubber flange 12 and a drum-shaped rubber tube 13 connected between the upper rubber flange 11 and the lower rubber flange 12, and the flange backs of the upper rubber flange 11 and the lower rubber flange 12 are respectively connected with a rigid flange ring 14, and the elastic extension tube 7 fixes the upper rubber flange 11 on a fan flange 16 of the fan 4 and fixes the lower rubber flange 12 on an air brake flange 17 of the fireproof air brake 8 through a connecting bolt 15 and the rigid flange ring 14.

Preferably, the vibration isolator 10 is a BE type rubber vibration isolator.

Preferably, the BE type rubber vibration isolator comprises a metal shell 18, a metal core 19 arranged in the metal shell 18, and a rubber body 20 connected between the metal shell 18 and the metal core 19, wherein the metal shell 18 is connected with the bracket 9, and the metal core 19 is connected with the transition mounting plate 6.

As a further improvement of this embodiment, the BE type rubber vibration isolator 10 is provided with a vibration isolation frequency fine-tuning device 21, and the vibration isolation frequency fine-tuning device 21 includes a section of expansion sleeve 22 disposed at the lower end of the metal core 19, a conical tension disc 23 disposed in an inner conical hole of the expansion sleeve 22, and an adjusting bolt 24 connected between the conical tension disc 23 and the metal core 19 for fine tuning of vibration isolation frequency.

In this embodiment, the expansion sleeve 22 is provided with a plurality of opening grooves 25 along the axial direction, so that the expansion sleeve 22 partially forms a split structure; when the adjusting bolt 24 is rotated, the opening degree of the expanding sleeve 22 with the split structure can be adjusted, so that the rigidity of the rubber body 20 is changed, and the aim of finely adjusting the vibration isolation frequency is fulfilled.

Preferably, a through-going female screw hole 26 is provided on the central axis of the metal core 19, and the upper screw end of the adjusting bolt 24 is connected to the female screw hole 26; the lower end of the metal shell 18 is provided with a hollow space 27 for operating the adjusting bolt 24, and the lower bolt head of the adjusting bolt 24 is located in the hollow space 27.

Preferably, an anti-loosening locking sheet 28 is arranged between the adjusting bolt 24 and the conical tensioning disc 23; an anti-rotation pin 31 is arranged on the outer conical surface of the conical tensioning disc 23, and the anti-rotation pin 31 is in sliding fit with the open slot 25; a belleville spring assembly 32 is arranged between the conical tension disc 23 and the metal core 19.

Example 2:

an installation method of the noise reduction structure of the marine engine room fan according to embodiment 1 includes the steps of:

(1) installation of the fan and the vibration isolation device: a support 9 serving as a vibration isolation device 29 and a BE type rubber vibration isolator 10 connected with the support 9 are installed on a ship cabin deck 2, the lower end of a fireproof air brake 8 is connected with an air duct pipe 3 of the ship cabin deck 2, a transition mounting plate 6 and an elastic telescopic pipe 7 are sequentially installed on a fan flange 16 at the lower end of a fan 4, then the fan 4 is integrally hoisted to the BE type rubber vibration isolator 10 arranged on the support 9, the BE type rubber vibration isolator 10 is fixed with the transition mounting plate 6 through a screw 30, and the lower end of the elastic telescopic pipe 7 is connected with the upper end of the fireproof air brake 8;

(2) starting a fan and testing noise: arranging a noise tester at a preset position of a ship engine room, and starting a fan 4 to carry out noise test;

(3) fine adjustment of vibration isolation frequency: finely adjusting the vibration isolation frequency by rotating an adjusting bolt 24 on the BE type rubber vibration isolator 10, observing the change condition of the noise value measured by a noise tester, and adjusting the noise value to BE minimum by adjusting the adjusting bolt 24; after the adjustment, the locking tongue of the anti-loose locking piece 28 is turned over and abuts against the hexagonal head side surface of the adjusting bolt 24, so that the adjusting bolt 24 is locked.

Example 3:

when the noise reduction structure of the ship engine room fan is designed, according to the optimized noise reduction arrangement structure of the fan, noise calculation software is adopted to recalculate the noise reduction effect, so that the noise isolation effect meets the design requirement; meanwhile, the vibration isolation frequency is finely adjusted during installation, so that the noise value is further minimized.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.