JP6029174B2 - Anti-vibration structure for marine equipment and ship equipped with the same - Google Patents

Description

  The present invention relates to a vibration isolation technique for marine equipment in a ship.

  Patent Document 1 discloses a vibration isolator that is provided between a hull and a prime mover installed on the hull and suppresses transmission of vibration from the prime mover to the hull. This vibration isolator has a vibration isolating structure that absorbs vertical vibrations by a coil spring and absorbs horizontal vibrations by a mesh spring.

JP 2011-196441 A

  In the vibration isolator as described above, since the structure is complicated, it is difficult to finely adjust the vibration generator (prime mover) and correct it after installation. Furthermore, if the vibration generating device is different, it is necessary to change the structure of the vibration isolating device, and the versatility is poor. Further, the overall height of the vibration isolator increases, and the height fluctuation due to creep increases. In view of the above, the present invention provides a technique that can be finely adjusted according to the vibration generating force of marine equipment serving as a vibration generator, and that can improve the creep properties by reducing the overall height of the vibration isolator. .

In Claim 1, it is a structure which is provided in the attachment part to the hull of marine equipment, and is anti-vibration for marine equipment, Comprising: The said marine equipment and the clearance gap provided between the said marine equipment and the mounting surface of a hull A vibration isolating material is formed by pouring liquid synthetic rubber and then curing so as to come into contact with each of the mounting surfaces of the hull with a predetermined area, and the vibration isolating material is a fastener. In a state where the installation bolts are installed, liquid synthetic rubber is poured into a mold that is installed on the mounting base side of the hull and cured. The shape and thickness of the anti-vibration material are determined by the shape of the form frame, and the marine equipment is attached to the mounting surface of the hull via the anti-vibration material. The structure is fastened and fixed .

  In claim 2, the contact area of the vibration isolator with respect to the mounting surface of the marine equipment and the hull is set so that the natural frequency of the vibration isolator does not resonate with the acoustic vibration generated by the marine equipment. Is.

In claim 3, the surface of the portion where the liquid synthetic rubber is poured into the synthetic rubber casting surface is subjected to a surface treatment for peeling the cured vibration isolating material, The inner surface is subjected to a surface treatment for facilitating peeling when removing the formwork .

In Claim 4, it is a ship provided with the anti-vibration structure of the marine equipment as described in any one of Claim 1 to 3, Comprising: The said marine equipment is attached to the position spaced apart from the flame | frame of the said hull. is there.

  ADVANTAGE OF THE INVENTION According to this invention, fine adjustment is attained according to the vibration force of the marine equipment used as a vibration generator, and the creep height can be improved by reducing the overall height of the vibration isolator.

It is a figure which shows the attachment part to the hull of marine equipment, and shows embodiment which installed the main engine and generator supported by the common platform on the hull. It is an expanded sectional view of an attaching part. It is a perspective view which shows a mode that a vibration isolator is installed in an attaching part. It is a perspective view of a vibration isolator. It is a figure which shows piping of the main engine. It is a figure which shows the positional relationship of the main engine (or main power generation engine) and the hull frame of a ship. It is a figure which shows another form of marine equipment, and shows embodiment which installed the vibration isolator in the model in which a main generator engine and a main generator (or a main engine and a deceleration reverse rotation machine) are directly connected to the fuselage. It is a figure which shows another form of marine equipment, and shows embodiment which installed the vibration isolator in the exhaust pipe fixing | fixed part of the engine (main engine or main power generation engine). It is a figure which shows another form of marine equipment, and embodiment which installed the vibration isolator in the support part of the ventilation fan of an engine room is shown. It is a figure which shows another form of marine equipment, and shows embodiment which installed the vibration isolator in the piping fixing | fixed part of the pump. It is an expanded sectional view which shows another form of an attaching part.

  The marine equipment is equipment that is provided in the marine vessel, and refers to a device that becomes a vibration generation source by vibrated force unique to the equipment. That is, marine equipment is equipment that is required to have a vibration-proof structure that suppresses transmission of vibration to the hull in the ship. The marine equipment of the present embodiment includes a prime mover such as a main engine that drives a propeller via a speed reducer, a main generator engine that drives a main generator, or an auxiliary engine that drives an electric motor, and a prime mover (main engine, main generator). Engine or auxiliary engine) exhaust pipe, engine room ventilation fan, piping connected to pumps, or air conditioning equipment.

  As shown in FIG. 1, the marine equipment 1 is installed on the hull 2 via a vibration isolator 3. The vibration isolator 3 is made of synthetic rubber. As a kind of synthetic rubber, what is necessary is just to be able to be used for marine equipment. As shown in FIGS. 1 and 2, the marine equipment 1 here is a main engine 11 and a generator 12 installed on a common floor 10. The anti-vibration material 3 is sandwiched in a gap provided between the lower surface of the common platform 10 that is the mounting surface on the marine equipment 1 side and the upper surface of the mounting table 20 that is the mounting surface on the hull 2 side, so that the marine equipment An anti-vibration structure is provided between 1 and the hull 2. Then, with the vibration isolator 3 disposed, the common platform 10 is fastened and fixed to the installation base 20 using the installation bolts 4 and nuts 5 and 5, and the marine equipment 1 is directly fastened to the hull 2. Thus, the marine equipment 1 is directly attached to the hull 2.

  As shown in FIG. 3, the vibration isolator 3 is provided with a gap between the marine equipment 1 and the hull 2 in a state where the installation bolts 4 (fasteners) are installed on the marine equipment 1 and the hull 2. Molding is performed by pouring liquid synthetic rubber into a mold 6 provided on the (mounting table 20) and curing it. The mold 6 has an arbitrarily designed enclosure shape, and is a molding mold installed on the lower surface side, that is, on the installation base 20 side, and determines the three-dimensional shape (planar shape and thickness) of the vibration isolator 3. To do. The mold 6 is removed after the vibration isolator 3 is molded. In the mounting table 20, the surface of the portion into which the liquid synthetic rubber is poured is subjected to a surface treatment for peeling the cured vibration isolator 3. Similarly, the inner surface of the mold 6 is subjected to a surface treatment for facilitating peeling when the mold 6 is removed.

  As shown in FIG. 4, the natural frequency of the vibration isolator 3 is determined by the contact area of the vibration isolator 3 with the common floor 10 and the installation base 20. This natural frequency is set to a value according to the vibration force of the marine equipment 1. More specifically, it is set to a value that does not resonate with the vibration in the acoustic range generated by the marine equipment 1, and is set to ensure soundproofing by attenuating the vibration in the acoustic range. Moreover, it is good also as a shape which provided the notch toward the one side of the vibration isolator 3 from the installation bolt 4 in order to make it easy to remove the vibration isolator 3 in the case of re-construction.

  As described above, when the vibration isolator 3 is molded, the surface shape can be changed to finely adjust the area of the contact surface, and the natural frequency can be set to an arbitrary continuous value. it can. Thereby, it is possible to provide the optimal vibration isolator 3 for preventing the vibration generated by the marine equipment 1. In particular, it is possible to effectively reduce the noise in the living room space by reducing the vibration in the acoustic range that leads to noise.

  By forming the vibration isolator 3 at the time of installation, the thickness of the vibration isolator 3 can also be arbitrarily adjusted. For this reason, considering the weight distribution of the marine equipment 1, etc., the thickness is partially increased or decreased according to the arrangement of the vibration isolator 3, or the mold 6 is divided to partially increase the hardness. By changing, an optimal mounting structure can be realized. Furthermore, fine adjustment can also be easily performed by adding or removing the vibration isolator 3 after construction, and matching with the marine equipment 1 can be easily improved. In addition, by performing a peeling treatment on the surface on which the vibration isolator 3 is applied, the re-installation of the vibration isolator 3 is simplified and readjustment is facilitated, and the vibration isolator 3 is replaced. The effort at the time can also be reduced.

  Moreover, weather resistance and oil resistance are securable by comprising the vibration isolator 3 with a synthetic rubber. And since vibration-proof property can be ensured with the simple structure which arrange | positions the vibration-proof material 3 between the marine equipment 1 and the hull 2, the number of parts required for a vibration-proof structure can be reduced. Furthermore, since the thickness of the vibration-proof material 3 can be reduced by molding the vibration-proof material 3 with a synthetic rubber having a high vibration-proof capability, the amount of creep proportional to the thickness can be reduced. In addition, when the clearance gap between the marine equipment 1 and the hull 2 is large when installing the vibration isolator 3, arrange | position a metal spacer between the vibration isolator 3 and the marine equipment 1. Thus, the thickness of the vibration isolator 3 can be kept small.

  As shown in FIG. 5, since the amount of creep of the vibration isolator 3 can be reduced and the vibration isolating effect of the vibration isolator 3 can be sufficiently expected, the fixed pipe 11a can be adopted as the pipe of the main engine 11. . Thereby, cost can be reduced compared with the case where flexible piping is used.

  As shown in FIG. 6, the marine equipment 1 in the engine room of the marine vessel is attached via installation bolts provided at positions separated from the frames 21, 22, and 23 of the hull 2. The frames 21, 22, and 23 are main frames that are passed in the width direction of the hull 2, and have a skeleton structure provided over the entire hull 2. The mounting table 20 is provided between the frames 21, 22, and 23. By arranging the marine equipment 1 at a position away from the frames 21, 22, and 23, it is possible to avoid direct vibration transmission to the frames 21, 22, and 23, and to reduce the living room by the damping effect at the frames 21, 22, and 23 It is difficult to transmit vibration to the space. Thus, the anti-vibration effect can be enhanced by disposing the marine equipment 1 away from the frames 21, 22, and 23.

  FIG. 7 shows an embodiment in which the marine equipment 1 in which the main generator engine and the main generator are directly connected to the fuselage is installed on the hull 2 via the vibration isolator 3. In this embodiment, the main power generation engine and the main generator are directly connected to the fuselage, so that the positional relationship in the height direction does not change. Also in this case, the same effects as those of the above-described embodiment including the common platform 10 are obtained. In addition, the marine equipment 1 in which the main engine 11 and the speed reducer / reverse gear are directly connected to the fuselage also have the same effects as those of the above-described embodiment including the common platform 10.

  FIG. 8 shows an embodiment in which the exhaust pipe 40 of the main engine 11 (or main power generation engine) is installed on the hull 2 via the vibration isolator 3. The marine equipment here is an exhaust pipe 40 fixed to the main engine 11 (or main power generation engine), and vibrates when the main engine 11 (or main power generation engine) vibrates. And the vibration-isolating material 3 is arrange | positioned in the attachment part to the hull 2 of the exhaust pipe 40, and it can suppress that the vibration of the exhaust pipe 40 is transmitted to the hull 2. FIG. Furthermore, the natural frequency (contact area with the exhaust pipe 40) of the vibration isolator 3 at this time is set to a value that does not resonate with the natural frequency of the exhaust pipe 40. Thereby, the sound region can be improved by suppressing the vibration in the acoustic range caused by the vibration of the exhaust pipe 40. The same configuration can be applied to the exhaust pipes of other prime movers such as the main power generation engine and the auxiliary engine.

  FIG. 9 shows an embodiment in which the ventilation fan 50 in the engine room is installed on the hull 2 via the vibration isolator 3. The marine equipment here is a ventilation fan 50 for exhausting air in the engine room. The shape of the vibration isolator 3 at this time is formed in an annular shape according to the shape of the flange that supports the ventilation fan 50, and the natural frequency of the vibration isolator 3 (with the flange that supports the ventilation fan 50). The contact area) is set to a value that does not resonate with the natural frequency of the ventilation fan 50. Thereby, the sound region can be improved by suppressing the vibration in the acoustic range caused by the vibration of the ventilation fan 50.

  FIG. 10 shows an embodiment in which a pipe 61 of a pump 60 for circulating cooling water or lubricating oil or the like is installed on a mounting portion of a hull 2 (for example, a ceiling surface of an engine room) via a vibration isolator 3. The marine equipment here is a pipe 61 of the pump 60. The piping 61 extends upward from the side of the pump 60, further extends downward from the upper side of the tank 62, and is connected to the upper surface of the tank 62. The natural frequency (contact area with the pipe 61) of the vibration isolator 3 at this time is set to a value that does not resonate with the natural frequency of the pipe 61. Thereby, the sound region can be improved by suppressing the vibration in the acoustic range caused by the vibration of the pipe 61.

  In addition to marine equipment as described above, it is also possible to install the vibration isolator 3 in a vibration generating device such as an auxiliary engine for driving an electric motor or an air outlet of an air conditioner. The anti-vibration structure including the anti-vibration material 3 can be applied to all marine equipment that can be a vibration generation source. Further, as shown in FIG. 11, in addition to disposing the vibration isolator 3 between the marine equipment 1 and the hull 2, the vibration isolator is attached to the mounting portion on the hull 2 side, that is, the nut 5 fastening portion to the installation bolt 4. The material 3 may be disposed. In this case, vibration from the marine equipment 1 to the hull 2 is vibrated by the vibration isolator 3 disposed between them, and vibration transmitted to the hull 2 side via the installation bolt 4 is transmitted to the hull 2 and the nut. The vibration isolating material 3 disposed between 5 can prevent vibrations, and the effect of preventing vibration transmission to the hull 2 side can be enhanced.

  1: Marine equipment, 2: Hull, 3: Anti-vibration material, 4: Installation bolt, 10: Common floor, 20: Installation base

Claims (4)

It is a structure that is provided at the mounting portion of the marine equipment to the hull and dampens the marine equipment,
It hardens | cures after pouring liquid synthetic rubber into the clearance gap provided between the said ship equipment and the mounting surface of a ship body so that it may contact with each of the said ship equipment and the mounting surface of a ship body with a predetermined area. With vibration-proof material molded by
The vibration-proof material is molded by pouring liquid synthetic rubber into a mold installed on the installation base side of the hull in a state where installation bolts that are fasteners are installed,
The mold is an enclosed shape, and a lower surface side is a molded mold placed on the installation base side, and the shape of the mold determines the planar shape and thickness dimension of the vibration isolator,
The marine equipment has a structure in which the marine equipment is fastened and fixed to the mounting surface of the hull via the vibration isolator .   The contact area of the vibration isolator with respect to the mounting surface of the marine equipment and the hull is set such that the natural frequency of the vibration isolator is a value that does not resonate with the acoustic vibration generated by the marine equipment. The anti-vibration structure for marine equipment according to claim 1. The surface of the portion where the liquid synthetic rubber is poured into the mounting surface on the synthetic rubber pouring side is subjected to a surface treatment for peeling the cured vibration-proofing material, and the inner surface of the mold is provided with a mold. The anti-vibration structure for marine equipment according to claim 1 or 2, wherein a surface treatment for facilitating peeling is performed when removing the frame . It is a ship provided with the anti-vibration structure for marine equipment according to any one of claims 1 to 3,
The marine equipment is attached to a position separated from a frame of the hull.

Images