A marine gas turbine casing

Abstract

The present application relates to a kind of marine gas turbine box, including gas turbine box;The gas turbine box is made of box skeleton and sound insulation wallboard five-face sealed box;The gas turbine box is provided with maintenance door and air inlet baffle;Gas turbine box top is provided with air inlet, exhaust port, cooling air port.The present application meets the thickness of sound insulation wallboard under the condition, high-performance sound insulation board, sound-absorbing felt, damping material, thermal blanket and other materials are sandwiched in a certain order and fixed to sound insulation wallboard, obtain a kind of marine gas turbine box.It not only solves the sound insulation and heat insulation of gas turbine box, anti-external impact, box lightweight, good sealing and corrosion resistance problem, but also can guarantee the safe operation of gas turbine device, while also improving the working conditions of operating personnel and reducing the pollution to surrounding environment.

Description

Technical Field

[0001] This invention belongs to the technical field of marine gas turbine power units, and specifically relates to a marine gas turbine housing. Background Technology

[0002] Since the 1970s, gas turbine power plants have been widely used in marine propulsion, industrial peak-shaving power generation, compressed natural gas pipelines, offshore platform power generation, and distributed energy power plants due to their superior performance, small size, high power density, fast start-up, and convenient maintenance. A gas turbine consists of three main components: a compressor, a combustion chamber, and a gas turbine. The compressor consumes mechanical power to increase the pressure of the air flowing through it. The compressed high-pressure air flows into the combustion chamber, where the chemical energy stored in the fuel is converted into heat energy to heat the working fluid. At this point, the high-pressure air becomes high-temperature, high-pressure gas. After flowing into the gas turbine, some of the heat and pressure energy in the high-temperature, high-pressure gas is converted into mechanical work to drive the compressor, accessories, and external loads.

[0003] Gas turbine units have three main noise sources during operation: intake noise, noise radiated from the gas turbine casing (compressor, combustion chamber, and gas turbine), and exhaust noise. The energy levels of these noise sources vary depending on the distance from different points around the gas turbine, the energy level of the noise sources, and the interference and superposition of sound waves from different sources. Typically, the airborne noise level generated by most gas turbines can reach 130 dB(A) to 150 dB(A).

[0004] Because gas turbines generate significant noise during operation, they can cause considerable harm to operators. Furthermore, the large amount of heat radiation from the outer surface of the gas turbine casing and heat leakage at the casing connection flanges all negatively impact the safe operation of marine gas turbine units, the working conditions of operators, and the surrounding environment. Therefore, a major improvement has been made in the overall design of gas turbines: the adoption of a "boxed" design concept.

[0005] A gas turbine enclosure is a complete and independent sealed enclosure and integral load-bearing base that houses the gas turbine unit. The enclosure has become an important component of the gas turbine plant, not only enclosing the main components of the gas turbine but also the intake and exhaust systems. The gas turbine enclosure comprises a base frame, enclosure, heating system, ventilation and cooling system, fire protection system, vibration dampers, and flexible connectors. The structural design of the enclosure wall panels is particularly important. Besides the ventilation and cooling system, considerations must be given to the airborne sound insulation, thermal insulation, material compatibility, rigidity, resistance to external impact, fire resistance, airtightness, resistance to nuclear contamination, resistance to biological and chemical contamination, ease of disassembly and assembly, and ease of routine maintenance of the enclosure wall panels.

[0006] Currently, existing marine gas turbine enclosures are assembled from a main frame and multiple steel wall panels. The main frame is welded from different steel profiles and serves as a load-bearing frame to withstand external impact loads. The wall panels include the front side panel, side panel, top panel, rear side panel, top panel, inlet flange, outlet flange, and inlet baffle, all of which are bolted to the main frame. To ensure good sound and heat insulation and overall rigidity, the wall panel frame is welded to the outer steel plate to form a load-bearing structural component. Insulation, sound insulation, sound absorption, and damping materials are sandwiched inside the wall panels. Two layers of sealing gaskets are also installed between the wall panels and the main frame to ensure the enclosure's airtightness and airtightness. The existing enclosure wall structure is composed of stacked components such as perforated steel plates, single-layer thermal insulation material, sound insulation panels, single-layer sound-absorbing material, damping material, and steel plates. Ultra-fine glass wool is chosen as the thermal and sound-absorbing material. This results in a limited number of layers of internal sandwich materials and a simple manufacturing process, significantly limiting the sound and thermal insulation performance of the enclosure. With the rapid development of gas turbine technology, the requirements for radiated noise limits are becoming increasingly stringent. The octave band center frequency for airborne noise measurement is in the range of 31.5Hz to 8000Hz, and the A-weighted sound pressure level radiated noise measured 1 meter outside the gas turbine enclosure is specified to be ≤90dB(A) to ensure a safe working environment for personnel and the surrounding environment during unit operation. However, due to the limited installation space, weight constraints, and high maintenance costs of marine gas turbine units, severe corrosion of the metal materials in the marine environment, and limitations on the thickness of the enclosure walls, the existing gas turbine enclosure technology can no longer meet these higher requirements. Summary of the Invention

[0007] The purpose of this invention is to provide a marine gas turbine enclosure that can solve problems such as air noise, heat radiation, wall panel rigidity, external impact, fire resistance, and sealing performance during gas turbine operation.

[0008] A marine gas turbine enclosure includes a gas turbine enclosure; the gas turbine enclosure is a sealed enclosure with five sides composed of an enclosure frame and sound insulation wall panels; the gas turbine enclosure is provided with a maintenance door and an air intake baffle; the top of the gas turbine enclosure is provided with an air intake, an exhaust port and a cooling air inlet.

[0009] Furthermore, the main body of the gas turbine housing is made of composite materials; the main body of the housing is formed by an integrated process of the housing frame and the outer panel, which improves the sealing performance of the main body of the wall panel; the composite materials include, but are not limited to, carbon fiber reinforced resin materials, glass fiber materials, and materials combining carbon fiber and glass fiber.

[0010] Furthermore, the soundproof wall panel is a composite panel composed of an outer panel, damping material, sound-absorbing felt A, sound insulation board, sound-absorbing felt B, fiberglass plate, fiber composite board, thermal insulation blanket A, sound-absorbing felt C, thermal insulation blanket B, and inner perforated plate, which are stacked and fixed in sequence. These materials are safe to use, environmentally friendly and pollution-free, fireproof and flame-retardant, non-toxic, water-repellent, have good environmental adaptability, and do not emit toxic gases when burned.

[0011] Furthermore, the soundproof wall panel uses two layers of high-temperature resistant insulation blankets, including insulation blanket A and insulation blanket B, which effectively reduces the heat transfer from the box to the outside.

[0012] Furthermore, the sound insulation wall panel adopts a four-layer board structure including fiber composite board, fiberglass board, outer panel and sound insulation board. The four-layer sound insulation board structure can effectively reduce transmitted sound energy and block the propagation of sound. The sound insulation wall panel is divided into outer layer and inner layer by fiber composite board to avoid sound bridge and thermal bridge caused by direct connection.

[0013] Furthermore, the soundproof wall panel uses three layers of materials with high sound absorption coefficients, including sound-absorbing felt A, sound-absorbing felt B, and sound-absorbing felt C, which can effectively increase the energy radiation attenuation rate inside the enclosure wall panel.

[0014] Furthermore, the inner surface of the outer panel is coated with a vibration-damping and sound-absorbing material, which can prevent the outer panel from forming a regenerative sound source due to vibration. When the sound propagates in it, it rubs against the surrounding medium and converts some of the sound energy into heat energy.

[0015] Furthermore, the soundproof wall panel uses high-density soundproof board and damping material to maximize sound transmission loss.

[0016] Furthermore, the box frame is composed of box vertical beams, box horizontal beams and an outer frame, the outer frame including outer vertical beams and outer horizontal beams.

[0017] Furthermore, the inner frame is composed of an inner horizontal beam, an inner vertical beam, the long side of the L-shaped frame, and the side of the L-shaped frame. After the fiber composite board is laid on the outer frame, the inner frame is then installed into the main body of the box and bonded and fixed.

[0018] The beneficial effects of this invention are as follows:

[0019] (1) The main body of the gas turbine housing is made of composite materials, including but not limited to carbon fiber reinforced resin materials, glass fiber and carbon fiber and glass fiber composite materials, which have strong corrosion resistance;

[0020] (2) Except for the maintenance door and air intake baffle on the main body of the box, the box frame and the outer panel are formed into the main body of the box using an integrated process, which improves the sealing performance and overall rigidity.

[0021] (3) The sound insulation wall panel adopts double-layer high temperature resistant insulation material, which is conducive to the selection of sound absorption, sound insulation and damping materials, while reducing the transfer of heat from the inside to the outside of the box.

[0022] (4) The sound insulation wall panel adopts a four-layer sound insulation board structure, which effectively reduces the transmitted sound energy and blocks the propagation of sound. The sound insulation wall panel is divided into an outer layer and an inner layer by composite fiberboard, avoiding sound bridges and thermal bridges caused by direct connection.

[0023] (5) The sound insulation wall panel is made of three layers of high sound absorption coefficient material, which effectively increases the energy radiation attenuation rate inside the box wall panel;

[0024] (6) In order to avoid the outer panel from forming a regenerative sound source due to vibration, a vibration damping and sound-absorbing damping material is sprayed on the inner surface of the outer panel. When the sound propagates in it, it rubs against the surrounding medium and converts some of the sound energy into heat energy, thereby achieving the purpose of vibration reduction and sound absorption.

[0025] (7) The sound transmission loss is proportional to the mass of the sound insulation wall panel. The sound insulation wall panel uses a high-density sound insulation board and damping material to maximize the sound transmission loss.

[0026] (8) These heat insulation, sound insulation, sound absorption and damping materials are safe to use, environmentally friendly and pollution-free, fireproof and flame-retardant, non-toxic, water-repellent, environmentally adaptable, and do not emit toxic gases when burning.

[0027] By adopting the above technical solution, and under the condition of meeting the thickness requirements of the soundproof wall panel, high-performance soundproof panels, sound-absorbing felt, damping materials, and heat insulation blankets are sandwiched and fixed inside the soundproof wall panel in a certain order, resulting in a marine gas turbine enclosure. This not only solves problems related to sound and heat insulation, resistance to external impacts, lightweight enclosure, good sealing, and corrosion resistance of the gas turbine enclosure, but also ensures the safe operation of the gas turbine unit, while improving the working conditions of operating personnel and reducing pollution to the surrounding environment. Attached Figure Description

[0028] Figure 1 A schematic diagram of the existing marine gas turbine enclosure structure;

[0029] Figure 2 This is a schematic diagram of the external shape of the marine gas turbine housing of the present invention;

[0030] Figure 3 For the present invention Figure 2 AA sectional view of the sound insulation wall panel;

[0031] Figure 4 This is a schematic diagram of the main structure of the box body of the present invention;

[0032] Figure 5 For the present invention Figure 3 View B of the inner skeleton. Detailed Implementation

[0033] The present invention will now be further described with reference to the accompanying drawings.

[0034] like Figure 1 As shown, Figure 1 This is a schematic diagram of the existing marine gas turbine enclosure structure, which is a frame structure. It includes an enclosure formed by wall panels 10 assembled onto the main frame 2 of the enclosure. The wall panels 10 include components such as front side wall panel 3, 10 side wall panels 4, 2 top wall panels 5, rear side wall panel 6, air intake flange 7, exhaust flange 8, and air intake baffle 9. The main frame 2 of the enclosure is a spatial frame made of multiple steel beams and steel columns welded together and installed on the gas turbine base frame.

[0035] Figure 2 The diagram shows the external shape of the gas turbine housing of the present invention. The gas turbine housing 11 is composed of a housing frame 16 and a sound insulation wall panel 29 forming a sealed housing with five sides. The gas turbine housing 11 is provided with a maintenance door 13 and an air intake baffle 9. The top of the gas turbine housing 11 is provided with an air inlet 28, an exhaust outlet 30, and a cooling air inlet 12.

[0036] Figure 3 for Figure 2The AA cross-sectional view of the sound insulation wall panel 29 shows that the sound insulation wall panel 29 is a composite panel formed by sequentially stacking and fixing the following materials: outer panel 15, damping material 17, sound-absorbing felt A18, sound insulation board 19, sound-absorbing felt B20, fiberglass plate 21, fiber composite board 22, thermal insulation blanket A23, sound-absorbing felt C24, thermal insulation blanket B25, and inner perforated plate 26. As can be seen from the figure:

[0037] (1) The main body 14 of the gas turbine housing 11 is made of composite materials, including but not limited to carbon fiber reinforced resin materials, glass fiber materials and carbon fiber and glass fiber composite materials;

[0038] (2) Two layers of high-temperature resistant insulation blankets are used, including insulation blanket A23 and insulation blanket B25, which effectively reduces the heat transfer from the box to the outside.

[0039] (3) The sound insulation wall panel 29 adopts a four-layer sound insulation board structure including fiber composite board 22, fiberglass board 21, outer panel 15 and sound insulation board 19. The four-layer board structure can effectively reduce transmitted sound energy and block the propagation of sound. The sound insulation wall panel 29 is divided into outer layer and inner layer by fiber composite board 22 to avoid sound bridge and thermal bridge caused by direct connection.

[0040] (4) The use of three layers of high sound absorption coefficient materials, including sound-absorbing felt A18, sound-absorbing felt B20 and sound-absorbing felt C24, can effectively increase the energy radiation attenuation rate inside the box wall panel.

[0041] (5) In order to avoid the outer panel 15 from forming a regenerative sound source due to vibration, a vibration damping and sound-absorbing damping material 17 is sprayed on the inner surface of the outer panel 15. When the sound propagates in it, it rubs against the surrounding medium and converts part of the sound energy into heat energy.

[0042] (6) The sound transmission loss is proportional to the mass of the sound insulation panel 29. The sound insulation panel 19 with a larger density and the damping material 17 are used to maximize the sound transmission loss.

[0043] Figure 4 This is a structural schematic diagram of the main body of the box. The main body 14 of the box is integrally formed by the outer panel 15 and the box frame 16. The main body 14 of the box is made of composite material. The box frame 16 is composed of box vertical beams 16a, box horizontal beams 16b and outer frame 16c. The outer frame 16c includes outer vertical beams 16e and outer horizontal beams 16d. The structural form of the box vertical beams 16a and box horizontal beams 16b includes, but is not limited to, the "square tube" shown in the figure.

[0044] Figure 5 for Figure 3The inner frame 27 is shown in view B. The inner frame 27 consists of an inner horizontal beam 27a, an inner vertical beam 27b, an L-shaped frame long side 27c, and an L-shaped frame side 27d. After the fiber composite board 22 is laid on the outer frame 16c, the inner frame 27 is installed into the main body 14 of the box and bonded in place. The structural shapes of the inner horizontal beam 27a and the inner vertical beam 27b include, but are not limited to, the "square tubes" shown in the figure.

[0045] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A marine gas turbine housing, characterized in that, Includes a gas turbine housing (11); the gas turbine housing (11) is a sealed housing with five sides composed of a housing frame (16) and sound insulation wall panels (29); the gas turbine housing (11) is provided with a maintenance door (13) and an air intake baffle (9); the top of the gas turbine housing (11) is provided with an air inlet (28), an exhaust outlet (30), and a cooling air inlet (12); The sound insulation wall panel (29) is a composite panel composed of an outer panel (15), damping material (17), sound-absorbing felt A (18), sound insulation board (19), sound-absorbing felt B (20), fiberglass plate (21), fiber composite board (22), heat insulation blanket A (23), sound-absorbing felt C (24), heat insulation blanket B (25), and inner perforated board (26) stacked and fixed in sequence; these materials have the characteristics of being safe to use, environmentally friendly and pollution-free, fireproof and flame-retardant, non-toxic, water-repellent, adaptable to the environment, and not emitting toxic gases when burning; The sound insulation wall panel (29) uses two layers of high temperature resistant heat insulation blankets, including heat insulation blanket A (23) and heat insulation blanket B (25), which effectively reduces the heat transfer from the box to the outside; The sound insulation wall panel (29) adopts a four-layer board structure including fiber composite board (22), fiberglass board (21), outer panel (15) and sound insulation board (19). The four-layer board structure can effectively reduce transmitted sound energy and block the propagation of sound. The sound insulation wall panel (29) is divided into outer layer and inner layer by fiber composite board (22) to avoid sound bridge and thermal bridge caused by direct connection.

2. The marine gas turbine housing according to claim 1, characterized in that, The main body (14) of the gas turbine housing (11) is made of composite material; the main body (14) is formed by the housing frame (16) and the outer panel (15) using an integrated process to improve the sealing performance of the main body of the wall panel; the composite material includes carbon fiber reinforced resin material, glass fiber material and material combining carbon fiber and glass fiber.

3. The marine gas turbine housing according to claim 1, characterized in that, The sound insulation wall panel (29) is made of three layers of materials with high sound absorption coefficients, including sound-absorbing felt A (18), sound-absorbing felt B (20) and sound-absorbing felt C (24), which can effectively increase the energy radiation attenuation rate inside the box wall panel.

4. A marine gas turbine housing according to claim 3, characterized in that, The inner surface of the outer panel (15) is coated with a vibration damping and sound-absorbing damping material (17), which can prevent the outer panel from forming a regenerative sound source due to vibration. When the sound propagates in it, it rubs against the surrounding medium and converts some of the sound energy into heat energy.

5. A marine gas turbine housing according to claim 4, characterized in that, The sound insulation wall panel (29) uses a high-density sound insulation board (19) and damping material (17) to maximize sound transmission loss.

6. A marine gas turbine housing according to claim 1 or 2, characterized in that, The box frame (16) is composed of box vertical beams (16a), box horizontal beams (16b) and outer frame (16c), and the outer frame (16c) includes outer vertical beams (16e) and outer horizontal beams (16d).

7. A marine gas turbine housing according to claim 6, characterized in that, The inner frame (27) is a load-bearing component consisting of an inner horizontal beam (27a), an inner vertical beam (27b), an L-shaped frame long side (27c), and an L-shaped frame side (27d). After the fiber composite board (22) is laid on the outer frame (16c), the inner frame (27) is installed into the box body (14) and bonded and fixed.

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