Independent fan room of rolling boat
By installing mufflers at the air inlet and outlet ends of the independent fan room of the car and adding muffler boards, the problem of difficult fan noise is solved, and better noise reduction effect and ventilation system efficiency are achieved.
Patent Information
- Application Number
- CN202421810956.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-07-30
Smart Images
Figure CN222591776U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of ship ventilation, in particular to an independent fan room of a roll-on / roll-off ship. Background Art
[0002] The cargo hold of a ro-ro ship is used to load cars, so the starting, stopping, driving and loading of the vehicles will generate exhaust gas, and the personnel working in the cargo hold also need a good air environment. Therefore, the cargo hold ventilation system is relied upon to provide necessary replacement and protection, and the cargo hold ventilation system is also a key inspection system for shipowners and classification societies.
[0003] For the mechanical ventilation system of a RoRo ship, there are generally two installation types for fans and system accessories, one is the hull structure fan room, and the other is an independent fan room.
[0004] The structural fan room is a very traditional cargo hold ventilation solution, where the fan, damper and silencer are all arranged in the structural air duct. The structural fan room has a high noise reduction capability and can select fans with relatively high wind pressure. It is more flexible to use, but it occupies a large space and is heavy.
[0005] Later, with the development of the shipbuilding industry, independent fans were invented after the traditional structural fan room. The wind room is compact, easy to install and maintain, easy to arrange, and light in weight. Independent fan rooms are widely used on PCTC ships. Of course, the disadvantage is that the space that can be optimized is small, the static pressure of the fan dare not consider too much margin, and the noise optimization plan is limited.
[0006] At present, most of the independent fan rooms used on ro-ro ships have open lower inlets. After the fresh air is sent into the cargo hold ventilation duct through the fan, silencer, and damper, it is finally sent into the cargo hold through the ventilation openings on the duct wall. The lower air inlet and the height restrictions of the fan room limit the design measures of the fan room in terms of noise control. The noise generated by the fan can be directly transmitted through the open inlet at the bottom of the fan room. Usually, the noise of the cargo hold fan on the ro-ro ship exceeds 100 decibels, but the noise of the fan 1 meter away is generally required not to exceed 85 decibels. This contradiction is also the difficulty in designing this system. Utility Model Content
[0007] In order to solve the above technical problems, the utility model provides an independent fan room for a roll-on / roll-off ship. Without affecting the overall height of the independent fan room after installation and without changing the main structure of the independent fan room, the silencer and the silencer plate are optimized and reasonably arranged, so that the static pressure selection margin of the fan is wider, the noise around the fan room is reduced, and the actual effectiveness of the cargo hold ventilation system and the noise environment of the entire ship are optimized.
[0008] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:
[0009] An independent fan room of a roll-on / roll-off ship comprises an independent fan room cover, a blower, a fan outlet silencer, an opening and closing damper and a fan inlet silencer, wherein a lower opening of the fan room air inlet is provided at the lower end of the independent fan room cover, the top end of the blower extends into the independent fan room cover from the lower opening of the fan room air inlet, the fan inlet silencer is fixedly arranged at the top end of the blower, the upper end of the opening and closing damper is fixedly arranged at the bottom end of the blower, the lower end of the opening and closing damper is connected to a fan unit base fixedly arranged at the outside of a deck opening, a fan outlet silencer base is fixedly arranged at the inside of the deck opening, and the upper end of the fan outlet silencer is fixedly arranged at the bottom end of the fan outlet silencer base; a ventilation opening is opened at the lower part of the duct wall of the cargo hold air supply duct.
[0010] Furthermore, a plurality of silencer sheets are provided inside the lower opening of the air inlet of the fan room and around the circumference of the air supply fan, and the intervals between two adjacent silencer sheets are the same.
[0011] Furthermore, a plurality of deck openings are spaced apart within the cargo hold air supply duct on the first deck below the fan outlet silencer, and a plurality of ventilation openings are spaced apart at the lower portion of the side wall of the cargo hold air supply duct below the deck opening, and one ventilation opening is located within the width of one deck opening.
[0012] Furthermore, a plurality of toggle plates are connected between an outer side wall of the blower located outside the independent blower room cover and a bottom end of the independent blower room cover.
[0013] Furthermore, the fan inlet silencer and the fan outlet silencer have the same height.
[0014] The utility model of the independent fan room of the roll-on / roll-off ship first moves the silencer under the fan of the fan room unit from under the fan to the inside of the air duct for installation, so that the height of the fan room can save the height of the silencer; secondly, a silencer of the same height is installed at the air inlet end of the fan, so that when the overall height of the fan room remains unchanged, the inlet / outlet of the fan are both installed with silencers, the inlet end is in the fan room, and the outlet end is in the air duct; thirdly, based on the open lower air inlet of the fan room, single-piece silencer panels are installed at equal distances. The noise originally transmitted directly from the open inlet is optimized by the absorption of the silencer panel, thereby better improving the noise around the fan room.
[0015] Compared with the prior art, the advantages of the utility model are:
[0016] 1. The height of the wind turbine room remains unchanged before and after optimization, because the aesthetics of the ship, the control of the center of gravity of the equipment, the regulatory requirements of the driving line of sight, etc. are all factors that restrict the height of the independent wind turbine room from being too high;
[0017] 2. The silencer at the fan outlet is cleverly arranged inside the air duct, saving space for installing the silencer at the fan inlet. At the same time, the installation of the fan inlet silencer also optimizes the noise level around the fan room;
[0018] 3. The open inlet at the bottom of the fan room is equipped with a silencer, which does not affect the appearance, has a high degree of integration, a compact structure, and optimizes the noise value around the fan room. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a structural side view of the independent fan room of the roll-on / roll-off ship described in the utility model;
[0020] Figure 2 This is a structural front view of the independent fan room of the roll-on / roll-off ship described in the utility model;
[0021] Figure 3 yes Figure 1 Middle DD direction view.
[0022] Among them, 1-independent fan room cover, 2-air supply fan, 3-fan outlet silencer, 4-opening and closing wind damper, 5-deck opening, 6-lower opening of fan room air inlet, 7-ventilation opening, 8-cargo hold air supply duct, 9-fan unit base, 10-fan outlet silencer base, 11-fan inlet silencer, 12-silencer plate, 13-cargo ship deck. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0024] like Figure 1-Figure 3As shown, an independent fan room of a ro-ro ship is provided with a deck opening on a ro-ro ship deck 13 located at the top of the cargo hold air supply duct, comprising an independent fan room cover 1, a blower 2, a blower outlet silencer 3, an opening and closing damper 4 and a blower inlet silencer 11, a blower room air inlet lower opening 6 is provided at the lower end of the independent fan room cover 1, a plurality of silencer sheets 12 are provided inside the blower room air inlet lower opening 6 and around the blower 2, and the intervals between two adjacent silencer sheets 12 are the same; the top end of the blower 2 extends from the blower room air inlet lower opening 6 into the independent fan room cover 1, the blower inlet silencer 11 is fixedly arranged at the top end of the blower 2, and the upper opening and closing damper 4 is provided with a plurality of silencer sheets 12; the upper opening and closing damper 4 is provided with a plurality of silencer sheets 12; the upper end of the blower 2 extends from the blower room air inlet lower opening 6 into the independent fan room cover 1, the blower room air inlet silencer 11 is fixedly arranged at the top end of the blower 2, and the upper opening and closing damper 4 is provided with a plurality of silencer sheets 12; ... The end is fixed to the bottom end of the air supply fan 2, the lower end of the opening and closing damper 4 is connected to the fan unit base 9 fixed to the outside of the deck opening 5, and the base of the fan outlet silencer 3 is fixed on the inner side of the deck opening 5, the upper end of the fan outlet silencer 3 is fixed to the bottom end of the fan outlet silencer base 10, and the fan inlet silencer 11 and the fan outlet silencer 3 have the same height; on the first deck below the fan outlet silencer 3, a plurality of deck openings 5 are spaced apart within the range of the cargo hold air supply duct, and a plurality of ventilation openings 7 are spaced apart at the lower part of the side wall of the cargo hold air supply duct 8 below the deck opening 5, and one ventilation opening 7 is located within the width of one deck opening 5.
[0025] A plurality of toggle plates are connected between the outer side wall of the blower 2 located outside the independent blower room casing 1 and the bottom end of the independent blower room casing 1 .
[0026] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. An independent fan room for a ro-ro ship, with a deck opening on the ro-ro ship deck located at the top of the cargo hold air supply duct, characterized in that: It includes an independent fan room cover, a blower, a fan outlet silencer, an opening and closing damper and a fan inlet silencer. A fan room air inlet lower opening is provided at the lower end of the independent fan room cover, the top end of the blower extends into the independent fan room cover from the fan room air inlet lower opening, the fan inlet silencer is fixedly arranged at the top end of the blower, the upper end of the opening and closing damper is fixedly arranged at the bottom end of the blower, the lower end of the opening and closing damper is connected to a fan unit base fixedly arranged on the outside of a deck opening, a fan outlet silencer base is fixedly arranged on the inside of the deck opening, the upper end of the fan outlet silencer is fixedly arranged at the bottom end of the fan outlet silencer base; a ventilation opening is opened at the lower part of the duct wall of the cargo hold air supply duct.
2. The independent wind turbine room for a roll-on / roll-off ship according to claim 1 is characterized in that: A plurality of silencer sheets are arranged inside the lower opening of the air inlet of the fan room and around the circumference of the air supply fan, and the intervals between two adjacent silencer sheets are the same.
3. The independent wind turbine room for a roll-on / roll-off ship according to claim 2 is characterized in that: A plurality of deck openings are spaced apart within the cargo hold air supply duct on the first deck below the fan outlet silencer, and a plurality of ventilation openings are spaced apart at the lower portion of the side wall of the cargo hold air supply duct below the deck opening, with one ventilation opening being within the width of one deck opening.
4. The independent wind turbine room for a roll-on / roll-off ship according to claim 1 is characterized in that: A plurality of toggle plates are connected between the outer side wall of the blower located outside the independent blower room cover and the bottom end of the independent blower room cover.
5. The independent wind turbine room for a roll-on / roll-off ship according to claim 1 is characterized in that: The fan inlet silencer and the fan outlet silencer have the same height.