Silencing air brake for fan of large loading cabin of ship

Abstract

The utility model discloses a silencing air brake for a fan of a ship large loading cabin, which relates to the technical field of ventilation of ship large loading cabins, and comprises a fixed shell and an axial flow fan, and further comprises a fastener and a silencing air brake body, and the silencing air brake body comprises an outer shell, a connecting end face, an outer sound absorption layer, a perforated plate, an inner sound absorption layer, a perforated plate and a dredging mechanism. The silencing air brake for the fan of the large loading cabin of the ship can be installed and debugged according to specific requirements of the ship, accurate control over air volume can be achieved by adjusting the position and the angle of the air brake baffle, meanwhile, noise generated when the fan runs is effectively reduced through the sound absorption material layer, and the noise reduction effect is good. The safety and reliability of the device are further improved through the arrangement of the protective net, and the device is simple in structure and convenient to operate and has good practicability and popularization value.

Description

Technical Field

[0001] This utility model relates to the field of ventilation technology for large loading compartments of ships, specifically a silencer for a fan in a large loading compartment of a ship. Background Technology

[0002] A windbreak is a device installed on a ship's ventilation duct. It is a gate that can block the flow of air and effectively prevent the ventilation duct from becoming a channel for heat conduction, smoke conduction, or even the spread of flames.

[0003] Noise control of ventilation systems in large loading compartments of ships is a crucial aspect of engineering design and a key indicator of its design quality. Currently, the primary method for noise reduction in large loading compartment ventilation systems is to install silencing devices within the ventilation shaft. This method allows airflow while reducing noise, and can be used to reduce noise from the intake and exhaust ports of various aerodynamic equipment or transmitted along ducts. However, due to limitations imposed by the reinforcement of ship bulkheads and deck structures, installing silencing devices within the ventilation shaft places certain requirements on layout and on-site construction, failing to adequately meet the specific needs of large loading compartment fans. Therefore, a silencing damper for large loading compartment fans in ships is urgently needed to address these issues. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a silencer for a ship's large loading compartment fan, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A silencer damper for a ship's large loading compartment fan includes a fixed shell and an axial flow fan, wherein the axial flow fan is disposed inside and connected to the fixed shell, and further includes:

[0007] Fastener, one side of which is connected to one end of the fixed shell;

[0008] The soundproof damper body is connected to the other side of the fastener and communicates with the inside of the fixed shell;

[0009] The silencer damper body includes:

[0010] The outer casing is connected to a fastener at one end;

[0011] Connect the end face to the other end of the outer casing;

[0012] The outer sound-absorbing layer is connected to the inner wall of the outer shell;

[0013] Perforated plate, connected to the inner side of the outer sound-absorbing layer;

[0014] The inner sound-absorbing layer is connected to the outer shell. The inner sound-absorbing layer is divided into two parts: a fixed sound-absorbing layer and a rotating sound-absorbing layer. The fixed sound-absorbing layer and the rotating sound-absorbing layer are connected by a spherical arc surface.

[0015] A perforated plate is connected to the outer side of the inner sound-absorbing layer, and an annular air duct is formed between the perforated plate and the perforated plate.

[0016] The unblocking mechanism is connected at one end to the rotating sound-absorbing layer on the inner sound-absorbing layer and at the other end to the outer shell. It is used to block or open the annular air duct.

[0017] As a further embodiment of this utility model: the unblocking mechanism includes:

[0018] The air damper baffle is located inside the annular air duct. There are two sets of air damper baffles, which are symmetrically located on both sides of the rotating sound-absorbing layer. The air damper baffle is arc-shaped, and the cross-section of the air damper baffle and the rotating sound-absorbing layer is circular.

[0019] A rotating shaft passes through and connects to the rotating sound-absorbing layer and the airlock baffle; the rotating shaft also passes through the outer shell and is rotatably connected to it.

[0020] The actuator is connected to the housing, and its output end is connected to the rotating shaft;

[0021] The limit switch, connected to the perforated plate, is used to limit the maximum rotation angle of the damper.

[0022] As a further embodiment of this utility model, a protective net is connected to the other end of the fixed shell.

[0023] As a further embodiment of this utility model, the outer shell is made of hot-dip galvanized steel sheet with a thickness of 0.75mm.

[0024] As a further embodiment of this utility model: both the perforated plate and the porous plate are metal porous plates with a hole diameter of 5mm and a perforation rate of 18%.

[0025] As a further aspect of this utility model: the inner sound-absorbing layer and the outer sound-absorbing layer are sound-absorbing material layers with a density of 64 kg / m³. 3 It is made of glass wool, and the surface of the glass wool is covered with a layer of glass cloth fibers.

[0026] Compared with the prior art, the beneficial effects of this utility model are:

[0027] The silencer damper for the large loading compartment fan of this utility model can be installed and debugged according to the specific needs of the ship. By adjusting the position and angle of the damper baffle, the air volume can be precisely controlled. At the same time, the sound-absorbing material layer effectively reduces the noise generated during the operation of the fan. The protective net further improves the safety and reliability of the device. This utility model has a simple structure, is easy to operate, and has good practicality and promotion value. Attached Figure Description

[0028] Figure 1 This is a longitudinal sectional view of a silencer for a ship's large loading compartment fan, as described in this utility model embodiment.

[0029] Figure 2 This is a cross-sectional view of a silencer for a ship's large loading compartment fan in an embodiment of this utility model.

[0030] Figure 3 for Figure 1 A cross-sectional view along the AA direction when the central windbreak is fully open.

[0031] Figure 4 for Figure 1 A cross-sectional view along the BB direction when the central windbreak is fully closed.

[0032] In the diagram: 1. Outer shell; 2. Outer sound-absorbing layer; 3. Perforated plate; 4. Inner sound-absorbing layer; 5. Perforated plate; 6. Air damper baffle; 7. Rotating shaft; 8. Actuator; 9. Limiter; 10. Connecting end face; 11. Fastener; 12. Silencing air damper body; 13. Axial flow fan; 14. Protective net; 15. Fixed shell. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] In this embodiment of the utility model, please refer to Figures 1 to 4 A silencer damper for a ship's large loading compartment fan includes a fixed housing 15 and an axial flow fan 13, wherein the axial flow fan 13 is disposed inside and connected to the fixed housing 15, and further includes:

[0035] Fastener 11 is connected to one end of the fixed shell 15 on one side;

[0036] The soundproof damper body 12 is connected to the other side of the fastener 11 and communicates with the inside of the fixed shell 15;

[0037] The silencer body 12 includes:

[0038] The outer casing 1 is connected at one end to the fastener 11;

[0039] The connecting end face 10 is connected to the other end of the outer casing 1;

[0040] The outer sound-absorbing layer 2 is connected to the inner wall of the outer shell 1;

[0041] Perforated plate 3 is connected to the inner side of outer sound-absorbing layer 2;

[0042] The inner sound-absorbing layer 4 is connected to the outer shell 1. The inner sound-absorbing layer 4 is divided into two parts: a fixed sound-absorbing layer and a rotating sound-absorbing layer. The fixed sound-absorbing layer and the rotating sound-absorbing layer are connected by a spherical arc surface.

[0043] The porous plate 5 is connected to the outer side of the inner sound-absorbing layer 4, and the porous plate 5 and the perforated plate 3 form an annular air duct.

[0044] The unblocking mechanism is connected at one end to the rotating sound-absorbing layer on the inner sound-absorbing layer 4 and at the other end to the outer shell 1, and is used to block or open the annular air duct.

[0045] The fixed shell 15 is connected to the outer shell 1 by fastener 11. The axial flow fan 13 is started, which draws air in from one end of the fixed shell 15 and discharges it through the annular air duct. The noise is absorbed and reflected by the outer sound-absorbing layer 2 and the inner sound-absorbing layer 4. The opening and closing degree of the annular air duct can be adjusted as needed by the control of the blocking mechanism.

[0046] As one embodiment of this utility model, please refer to Figures 1 to 4 The unblocking mechanism includes:

[0047] The air damper 6 is located inside the annular air duct. There are two sets of air dampers 6, which are symmetrically located on both sides of the rotating sound-absorbing layer. The air damper 6 is arc-shaped, and the cross-section of the air damper 6 and the rotating sound-absorbing layer is circular.

[0048] A rotating shaft 7 passes through and connects to the rotating sound-absorbing layer and the airlock baffle 6, and the rotating shaft 7 passes through the outer shell 1 and is rotatably connected to it;

[0049] Actuator 8 is connected to housing 1, and its output end is connected to rotating shaft 7;

[0050] Limiter 9, connected to perforated plate 3, is used to limit the maximum rotation angle of damper 6.

[0051] Actuator 8 is used to drive the rotating shaft 7 to rotate, thereby controlling the position of the damper 6 and the rotating sound-absorbing layer, and adjusting the opening and closing degree of the annular air duct as needed. Limiter 9 limits the maximum rotation angle of the damper 6 to ensure that the annular air duct can be completely closed when the damper 6 is rotated to the vertical state.

[0052] As one embodiment of this utility model, please refer to Figure 1 and Figure 2 The other end of the fixed shell 15 is connected to a protective net 14.

[0053] The protective net 14 is used to prevent foreign objects from entering the axial flow fan 13 and to protect the safe operation of the axial flow fan 13.

[0054] In one embodiment of this utility model, the outer shell 1 is made of hot-dip galvanized steel sheet with a thickness of 0.75mm, which has good corrosion resistance and structural strength; the perforated plate 3 and the porous plate 5 are both metal porous plates with a pore diameter of 5mm and a perforation rate of 18%. This design can effectively reduce noise while ensuring smooth airflow; the inner sound-absorbing layer 4 and the outer sound-absorbing layer 2 are sound-absorbing material layers with a density of 64kg / m³. 3 It is made of glass wool, and the surface of the glass wool is covered with a layer of glass cloth fibers. This material has excellent sound absorption properties and can effectively absorb the noise generated by the fan.

[0055] The working principle of this utility model is as follows: When the silencer damper for the ship's large loading compartment fan is in operation, the axial flow fan 13 starts, drawing air in from one end of the fixed shell 15 and discharging it through the silencer damper body 12. Noise is absorbed and reflected by the outer sound-absorbing layer 2 and the inner sound-absorbing layer 4 after passing through the perforated plate 3 and the porous plate 5. Through the control of the blocking mechanism, the damper baffle 6 can adjust the opening and closing degree of the annular air duct as needed. When the damper baffle 6 is open, the airflow can be smoothly discharged through the annular air duct; when the damper baffle 6 is closed, the airflow is blocked, thereby achieving flexible adjustment of the air volume. At the same time, the fixed sound-absorbing layer and the rotating sound-absorbing layer of the inner sound-absorbing layer 4 can adjust the sound absorption effect according to the change of airflow, further reducing noise. The entire device, through optimized structural design and material selection, achieves good noise reduction effect and air volume adjustment function while ensuring ventilation efficiency, and is suitable for the use of ship's large loading compartment fans.

[0056] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0057] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A silencer for a ship's large loading compartment ventilation fan, comprising a fixed shell and an axial flow fan, wherein the axial flow fan is disposed inside and connected to the fixed shell, characterized in that, Also includes: Fastener, one side of which is connected to one end of the fixed shell; The soundproof damper body is connected to the other side of the fastener and communicates with the inside of the fixed shell; The silencer damper body includes: The outer casing is connected to a fastener at one end; Connect the end face to the other end of the outer casing; The outer sound-absorbing layer is connected to the inner wall of the outer shell; Perforated plate, connected to the inner side of the outer sound-absorbing layer; The inner sound-absorbing layer is connected to the outer shell. The inner sound-absorbing layer is divided into two parts: a fixed sound-absorbing layer and a rotating sound-absorbing layer. The fixed sound-absorbing layer and the rotating sound-absorbing layer are connected by a spherical arc surface. A perforated plate is connected to the outer side of the inner sound-absorbing layer, and an annular air duct is formed between the perforated plate and the perforated plate. The unblocking mechanism is connected at one end to the rotating sound-absorbing layer on the inner sound-absorbing layer and at the other end to the outer shell. It is used to block or open the annular air duct.

2. The silencer for a ship's large loading compartment fan according to claim 1, characterized in that, The unblocking mechanism includes: The air damper baffle is located inside the annular air duct. There are two sets of air damper baffles, which are symmetrically located on both sides of the rotating sound-absorbing layer. The air damper baffle is arc-shaped, and the cross-section of the air damper baffle and the rotating sound-absorbing layer is circular. A rotating shaft passes through and connects to the rotating sound-absorbing layer and the airlock baffle; the rotating shaft also passes through the outer shell and is rotatably connected to it. The actuator is connected to the housing, and its output end is connected to the rotating shaft; The limit switch, connected to the perforated plate, is used to limit the maximum rotation angle of the damper.

3. A silencer for a ship's large loading compartment fan according to claim 1, characterized in that, A protective net is connected to the other end of the fixed shell.

4. A silencer for a ship's large loading compartment fan according to claim 1, characterized in that, The outer shell is made of hot-dip galvanized steel sheet with a thickness of 0.75mm.

5. A silencer for a ship's large loading compartment fan according to claim 1, characterized in that, Both the perforated plate and the porous plate are metal porous plates with a pore diameter of 5 mm and a perforation rate of 18%.

6. A silencer for a ship's large loading compartment fan according to claim 1, characterized in that, The inner and outer sound-absorbing layers are sound-absorbing material layers with a density of 64 kg / m³. 3 It is made of glass wool, and the surface of the glass wool is covered with a layer of glass cloth fibers.

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