阅读说明：本技术 一种船用燃气轮机排气蜗壳的引射装置 (Ejector device of exhaust volute of marine gas turbine ) 是由 施红 季雷 张倩维 康传智 胡亮春 王蛟 于 2021-07-28 设计创作，主要内容包括：本发明公开一种船用燃气轮机排气蜗壳的引射装置,该装置中设计了由内向外环套设置、且可调节引射面积的多级喷嘴,最中心的一级波瓣喷嘴与方转圆内喷管管口贯通相接、其余三个波瓣喷嘴高度可调地活动套设在其外部；该设计解决了船用燃气轮机在不同工况下烟气速度不同导致的箱装体引射冷却问题,提高了燃气轮机不同工况下烟气能量的利用效率：在保证燃气轮机不同工况下引射能力的同时有效降低了不同工况下排气的压力损失；同时可针对不同工况下燃气轮机箱装体内的温度进行良好的控制。(The invention discloses an injection device of a marine gas turbine exhaust volute, wherein a multistage nozzle which is arranged from inside to outside in a ring sleeve mode and can adjust injection area is designed in the injection device, a centremost first-stage lobe nozzle is communicated with a square-turn round inner nozzle pipe orifice, and the other three lobe nozzles are movably sleeved outside the injection device in a height-adjustable mode; this design has been solved marine gas turbine and has been drawn and penetrate the cooling problem at the box packing body that the flue gas velocity difference leads to under different work condition, has improved the utilization efficiency of flue gas energy under the different work condition of gas turbine: the injection capacity of the gas turbine under different working conditions is ensured, and the exhaust pressure loss under different working conditions is effectively reduced; meanwhile, the temperature in the gas turbine box package under different working conditions can be well controlled.)

1. The ejector device of the exhaust volute of the marine gas turbine is characterized by comprising a multi-stage nozzle, a flue gas guiding device and a control module;

the flue gas guiding device comprises a square-to-round inner spray pipe and a base, the base is fixedly connected with the outer surface of the exhaust volute of the gas turbine, and the square-to-round inner spray pipe is communicated with the exhaust port;

the multistage nozzle comprises a first-stage lobe nozzle, a second-stage lobe nozzle, a third-stage lobe nozzle and a fourth-stage lobe nozzle which are sequentially sleeved in a ring from inside to outside, the first-stage lobe nozzle is communicated with the orifice of the square-turn round inner spray pipe, and the other three lobe nozzles are movably sleeved outside the square-turn round inner spray pipe in a height-adjustable manner;

the control module comprises a first-level height regulating component, a second-level height regulating component, a third-level height regulating component, a current meter, a motor and a main controller, wherein the motor and the current meter are electrically connected with the main controller respectively, a speed measuring end of the current meter extends into the square-to-circle inner spray pipe, and the first-level height regulating component, the second-level height regulating component and the third-level height regulating component respectively control the heights of the second-level lobe nozzle, the third-level lobe nozzle and the fourth-level lobe nozzle through the motor in a corresponding mode.

2. The ejector device of the exhaust volute of the marine gas turbine as claimed in claim 1, wherein the primary height adjusting and controlling assembly at the bottom of the secondary lobe nozzle comprises a primary connecting ring, a support rod and a primary hydraulic rod, the bottom of the secondary lobe nozzle is fixed above the primary connecting ring, the bottom of the support rod is fixedly connected with the base, the top of the primary hydraulic rod is fixedly connected with the bottom of the primary connecting ring, and the primary hydraulic rod can be retracted into the inner cavity of the support rod under the action of the motor.

3. The ejector device of the exhaust volute of the marine gas turbine as claimed in claim 1, wherein the secondary height adjusting and controlling assembly at the bottom of the tertiary lobe nozzle comprises a secondary connecting ring, a supporting rod, a primary hydraulic rod and a secondary hydraulic rod, the bottom of the tertiary lobe nozzle is fixed above the secondary connecting ring, the bottom of the supporting rod is fixedly connected with the base, the top of the secondary hydraulic rod is fixedly connected with the bottom of the secondary connecting ring, and the primary hydraulic rod and the secondary hydraulic rod can both retract into the inner cavity of the supporting rod under the action of a motor.

4. The ejector device of the exhaust volute of the marine gas turbine as claimed in claim 1, wherein the tertiary height adjusting and controlling assembly at the bottom of the four-stage lobe nozzle comprises a tertiary connecting ring, a support rod, a primary hydraulic rod, a secondary hydraulic rod and a tertiary hydraulic rod, the bottom of the four-stage lobe nozzle is fixed above the tertiary connecting ring, the bottom of the support rod is fixedly connected with the base, the top of the tertiary hydraulic rod is fixedly connected with the bottom of the tertiary connecting ring, and the primary hydraulic rod, the secondary hydraulic rod and the tertiary hydraulic rod can be retracted into the inner cavity of the support rod under the action of a motor.

5. The ejector device of the exhaust volute of the marine gas turbine as claimed in claim 2, wherein a plurality of sets of primary height adjusting and controlling auxiliary members are arranged at the bottom of the primary connecting ring, each primary height adjusting and controlling auxiliary member comprises an auxiliary support rod and a primary telescopic rod arranged at the top of the auxiliary support rod, the bottom of the auxiliary support rod is fixedly connected with the base, the top of the primary telescopic rod is fixedly connected with the bottom of the primary connecting ring, the primary telescopic rod and the primary hydraulic rod have the same length, the auxiliary support rod and the support rod have the same length, and the primary telescopic rod can be passively retracted into the inner cavity of the auxiliary support rod.

6. The ejector device of the exhaust volute of the marine gas turbine as claimed in claim 3, wherein a plurality of sets of secondary height adjusting and controlling auxiliary members are arranged at the bottom of the secondary connecting ring, each secondary height adjusting and controlling auxiliary member comprises an auxiliary support rod, a primary telescopic rod and a secondary telescopic rod, the bottom of the auxiliary support rod is fixedly connected with the base, the top of the secondary telescopic rod is fixedly connected with the bottom of the secondary connecting ring, the lengths of the primary telescopic rod and the secondary telescopic rod are respectively the same as those of the primary hydraulic rod and the secondary hydraulic rod, the lengths of the auxiliary support rod and the support rod are the same, and the primary telescopic rod and the secondary telescopic rod can be passively retracted into the inner cavity of the auxiliary support rod.

7. The ejector device of the exhaust volute of the marine gas turbine as claimed in claim 4, wherein two sets of three-level height adjusting and controlling auxiliary members are arranged at the bottom of the three-level connecting ring, each three-level height adjusting and controlling auxiliary member comprises an auxiliary support rod, a first-level telescopic rod, a second-level telescopic rod and a third-level telescopic rod, the bottom of the auxiliary support rod is fixedly connected with the base, the top of the third-level telescopic rod is fixedly connected with the bottom of the three-level connecting ring, the lengths of the first-level telescopic rod, the second-level telescopic rod and the third-level telescopic rod are respectively equal to the lengths of the first-level hydraulic rod, the second-level hydraulic rod and the third-level hydraulic rod, the length of the auxiliary support rod is equal to that of the support rod, and the first-level telescopic rod, the second-level telescopic rod and the third-level telescopic rod can be passively retracted into the inner cavity of the auxiliary support rod.

Technical Field

The invention belongs to the technical field of ship gas turbines, particularly relates to an environment control device for a ship gas turbine box assembly, and particularly relates to an injection device for an exhaust volute of a ship gas turbine.

Background

The structure and the pneumatic performance of the exhaust ejector of the marine gas turbine are important directions for the technical research of ship loading of the gas turbine. The gas turbine has high working temperature during operation and large heat dissipation capacity on the surface of the combustion chamber. Therefore, when the gas turbine operates in the closed casing, the combustion chamber releases heat by surface radiation and convection heat transfer, and the flange joint has a high-temperature gas leakage phenomenon, so that the temperature of the inner surface of the casing and the temperature of air in the casing are rapidly increased, and the temperature of accessories such as an electric control element, a starter and the like mounted on the gas turbine exceeds the use limit. Meanwhile, when the temperature in the box body is too high, the heat exchange amount of the outer surface of the box body to the engine room is increased, the condition is obviously not favorable for safety production of workers, and the health of the workers can be obviously harmed.

Therefore, it is necessary to perform a cooling process on the gas turbine casing, and conventionally, the cooling of the gas turbine casing is performed in two ways: (1) when the machine is stopped, a fan is adopted to carry out air entraining to carry out forced cooling on the box body; (2) when the injection cooling device works, the exhaust kinetic energy of the gas turbine is adopted to inject air in the environment to inject and cool the box-packed body. The 34 th volume 9 th of Shanghai university of transportation reports discloses a mathematical model about a gas turbine exhaust injection cooling system and a calculation article thereof, and a schematic diagram of a multistage exhaust injection cooling device is disclosed in the mathematical model, cooling air is injected by high-temperature gas in a pipe from gaps of diffuser rings at all stages, so that the wall surface of an exhaust pipe is isolated from the gas, the heat convection of hot gas to the wall surface is reduced, the wall surface temperature is reduced, the infrared radiation of the wall surface is effectively inhibited, and under the operating condition, the device is subjected to the coupling heat transfer effects of forced heat convection, heat conduction and radiation heat transfer between the pipe wall and the gas, and the environment of a box body can be effectively improved.

However, it should be noted that when the injection cooling method is used, the injection amount becomes a target parameter for the structural design of the injector and the box body thereof. The excessive injection amount can cause the structure size of the air inlet pipeline to be too large, and the structural arrangement of the box body in the engine room is not facilitated. If the injection amount is too small, the injection capacity of the injector is insufficient, so that the temperature of the surface of the box and the temperature of internal accessories are too high, and further the operation fault of the gas turbine is caused. Therefore, the injection cooling device disclosed in the prior art has the defect of nonadjustable injection capacity. In addition, when the gas turbine operates, different operation conditions of low speed and high speed exist, and the exhaust performance of the gas turbine differs under different operation conditions, so that different operation conditions are faced, and the ejector structure with reasonable design meets the ejection requirement under the full-envelope operation condition to become the bottleneck of the design of the existing ejector, thereby solving the technical problem which needs to be solved urgently at present in the field.

Disclosure of Invention

The invention aims to provide an environment control device for a marine gas turbine box assembly, in particular to an injection device for an exhaust volute of a marine gas turbine, which comprehensively considers the working states of the marine gas turbine under different working conditions, controls the speed of flue gas flowing out of a nozzle, improves the injection capability of the flue gas on the premise of reducing the exhaust pressure loss of the gas turbine and the loads of other components of an exhaust system, and further effectively controls the temperature in the gas turbine box assembly.

The technical scheme disclosed by the invention is as follows: an injection device of a gas turbine exhaust volute for a ship comprises a multi-stage nozzle, a flue gas guiding device and a control module; the flue gas guiding device comprises a square-to-round inner spray pipe and a base, the base is fixedly connected with the outer surface of the exhaust volute of the gas turbine, and the square-to-round inner spray pipe is communicated with the exhaust port; the multistage nozzle comprises a first-stage lobe nozzle, a second-stage lobe nozzle, a third-stage lobe nozzle and a fourth-stage lobe nozzle which are sequentially sleeved from inside to outside, the first-stage lobe nozzle is communicated with the orifice of the square-turn round inner spray pipe, and the other three lobe nozzles are movably sleeved outside the square-turn round inner spray pipe in a height-adjustable manner; the control module comprises a first-level height regulating component, a second-level height regulating component, a third-level height regulating component, a current meter, a motor and a main controller, wherein the motor and the current meter are electrically connected with the main controller respectively, a speed measuring end of the current meter extends into the square-turn-round inner spray pipe, and the first-level height regulating component, the second-level height regulating component and the third-level height regulating component are respectively controlled by the motor to correspondingly control the heights of the second-level lobe nozzle, the third-level lobe nozzle and the fourth-level lobe nozzle.

Further, the one-level height control subassembly of second grade lobe nozzle bottom includes one-level go-between, bracing piece and one-level hydraulic stem, and second grade lobe nozzle bottom is fixed in one-level go-between top, bracing piece bottom and base fixed connection, one-level hydraulic stem top and one-level go-between bottom fixed connection, and under the motor effect, the one-level hydraulic stem can be collapsible to in the bracing piece inner chamber.

Further, the second grade height control subassembly of tertiary lobe nozzle bottom includes second grade go-between, bracing piece, one-level hydraulic stem and second grade hydraulic stem, and tertiary lobe nozzle bottom is fixed in second grade go-between top, bracing piece bottom and base fixed connection, second grade hydraulic stem top and second grade go-between bottom fixed connection, and under the motor effect, one-level hydraulic stem and second grade hydraulic stem all can contract to the inner chamber of bracing piece in.

Further, the tertiary high regulation and control subassembly of level four lobe nozzle bottom includes tertiary go-between, bracing piece, one-level hydraulic stem, second grade hydraulic stem and tertiary hydraulic stem, and level four lobe nozzle bottom is fixed in tertiary go-between top, bracing piece bottom and base fixed connection, tertiary hydraulic stem top and tertiary go-between bottom fixed connection, and under the motor effect, one-level hydraulic stem, second grade hydraulic stem and tertiary hydraulic stem all can contract to the inner chamber of bracing piece in.

Further, be equipped with the high regulation and control auxiliary member of several sets of one-level bottom the one-level go-between, the high regulation and control auxiliary member of one-level includes auxiliary support pole and establishes the one-level telescopic link at its top, auxiliary support pole bottom and base fixed connection, one-level telescopic link top and one-level go-between bottom fixed connection, the one-level telescopic link is the same with the length of one-level hydraulic stem, auxiliary support pole is the same with the length of bracing piece, the one-level telescopic link can contract passively to the auxiliary support pole inner chamber in.

Further, be equipped with high regulation and control auxiliary member of several groups second grade bottom the second grade go-between, the high regulation and control auxiliary member of second grade includes auxiliary support rod, one-level telescopic link and second grade telescopic link, auxiliary support rod bottom and base fixed connection, second grade telescopic link top and second grade go-between bottom fixed connection, the length of one-level telescopic link and second grade telescopic link is the same with the length of one-level hydraulic stem and second grade hydraulic stem respectively, auxiliary support rod is the same with the length of bracing piece, one-level telescopic link and second grade telescopic link all can contract passively to in auxiliary support rod's the inner chamber.

Further, be equipped with two sets of tertiary high regulation and control auxiliaries bottom tertiary go-between, tertiary high regulation and control auxiliaries includes auxiliary support pole, one-level telescopic link, second grade telescopic link and tertiary telescopic link, auxiliary support pole bottom and base fixed connection, tertiary telescopic link top and tertiary go-between bottom fixed connection, one-level telescopic link, the length of second grade telescopic link and tertiary telescopic link respectively with the one-level hydraulic stem, the length correspondence of second grade hydraulic stem and tertiary hydraulic stem is the same, auxiliary support pole is the same with the length of bracing piece, one-level telescopic link, second grade telescopic link and tertiary telescopic link all can contract to auxiliary support pole's inner chamber passively in

Compared with the prior art, the invention has the following advantages:

1. the injection device of the gas turbine exhaust volute can adjust injection states according to different working conditions, in the low-speed working condition, smoke is accelerated through the smaller lobe nozzles to improve injection capacity of the low-speed working condition, the using number of the lobe nozzles is gradually increased along with the rising of working condition grades, the smoke can be enabled to slow down through the multistage lobe nozzles to restrain the injection capacity exceeding requirements, the device can effectively reduce pressure loss of an exhaust system under different working conditions while ensuring the injection capacity of the gas turbine under different working conditions, and the working efficiency of the gas turbine is improved;

2. the lobe nozzle with the adjustable area is designed, so that the problem of ejection cooling of the box body caused by different flue gas velocities of the gas turbine under different working conditions is solved, the utilization efficiency of the flue gas energy of the gas turbine under different working conditions is improved, and the temperature in the box body can be well controlled;

3. besides the design of the active lifting first-level, second-level and third-level height regulating and controlling components, the lifting auxiliary first-level, second-level and third-level height regulating and controlling auxiliary pieces are further designed, and the stability of the lobe nozzle in position regulation and control and the using process can be effectively improved.

Drawings

FIG. 1 is a schematic structural diagram of an ejector of an exhaust volute of a gas turbine for a ship in an initial state;

FIG. 2 is a schematic illustration of the eductor apparatus of FIG. 1 with the secondary, tertiary, and quaternary lobe nozzles removed;

FIG. 3 is a diagram of the use state of the ejector device when the marine gas turbine is in 40% -65% working condition;

FIG. 4 is a diagram of the use state of the ejector device when the marine gas turbine is in 65% -85% working condition;

FIG. 5 is a diagram of the use state of the ejector device when the marine gas turbine is in 85% -100% working condition;

FIG. 6 is a schematic structural view of a multi-stage nozzle;

wherein, 1-a multi-stage nozzle, 2-a smoke gas guiding device and 3-a control module;

21-square-rotating round inner spray pipe, 22-base;

11-first-stage lobe nozzle, 12-second-stage lobe nozzle, 13-third-stage lobe nozzle and 14-fourth-stage lobe nozzle;

31-a primary height regulating component, 32-a secondary height regulating component, 33-a tertiary height regulating component, 34-a flow meter, 35-a motor, 36-a main controller, 37-a primary height regulating auxiliary component, 38-a secondary height regulating auxiliary component and 39-a tertiary height regulating auxiliary component;

311-primary connecting ring, 312-supporting rod, 313-primary hydraulic rod;

321-a secondary connecting ring, 322-a secondary hydraulic rod;

331-a three-level connecting ring, 332-a three-level hydraulic rod;

371-auxiliary supporting rod, 372-primary telescopic rod;

381-two-stage telescopic rod;

391-three-stage telescopic rod.

Detailed Description

The technical solution of the present invention is further described below with reference to the accompanying drawings, but not limited thereto, and any modification or equivalent replacement of the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention shall be covered by the protection scope of the present invention.

In order to adapt to different use working conditions of the gas turbine, the working load of the gas turbine can be reduced while the cooling effect of a box body is ensured, and the pressure loss of an exhaust system is reduced, the injection device is further improved in the embodiment, and the novel injection device of the exhaust volute of the marine gas turbine is designed;

the injection device comprises a multi-stage nozzle 1, a flue gas guiding device 2 and a control module 3;

the flue gas guiding device 2 comprises a square-to-round inner spray pipe 21 and a base 22, the base 22 is fixedly connected with the outer surface of the exhaust volute of the gas turbine, and the square-to-round inner spray pipe 21 is communicated with an exhaust port of the exhaust volute;

the multistage nozzle 1 consists of four lobe nozzles sequentially sleeved from inside to outside, the four lobe nozzles are similar in shape and different in size, a first-stage lobe nozzle 11, a second-stage lobe nozzle 12, a third-stage lobe nozzle 13 and a fourth-stage lobe nozzle 14 are sequentially arranged from inside to outside, the first-stage lobe nozzle 11 is communicated with a nozzle of a square-turn round inner spray pipe 21, and the second-stage lobe nozzle 12, the third-stage lobe nozzle 13 and the fourth-stage lobe nozzle 14 are movably sleeved outside the first-stage lobe nozzle 11 in a height-adjustable mode;

control module 3 includes one-level height regulation and control subassembly 31, second grade height regulation and control subassembly 32, tertiary height regulation and control subassembly 33, velocity meter 34, motor 35 and main control unit 36, motor 35 and velocity meter 34 respectively with main control unit 36 electric connection, the end that tests the speed of velocity meter 34 extends to and is used for surveing the flue gas velocity of flow in the square circle spray tube 21, one-level height regulation and control subassembly 31, second grade height regulation and control subassembly 32 and tertiary height regulation and control subassembly 33 are respectively by motor control correspondence carry out the height adjustment work of second grade lobe nozzle 12, tertiary lobe nozzle 13 and level four lobe nozzle 14.

The primary height regulating component 31 at the bottom of the secondary lobe nozzle 12 comprises a primary connecting ring 311, a supporting rod 312 and a primary hydraulic rod 313, the bottom of the secondary lobe nozzle 12 is fixed above the primary connecting ring 311, the bottom of the supporting rod is fixedly connected with the base 22, the top of the primary hydraulic rod 313 is fixedly connected with the bottom of the primary connecting ring 311, and the primary hydraulic rod 313 can be retracted into the inner cavity of the supporting rod 312 under the action of the motor 35.

The second grade height control subassembly 32 of tertiary lobe nozzle 13 bottom includes second grade go-between 321 and from supreme bracing piece 312, one-level hydraulic stem 313 and the second grade hydraulic stem 322 that set gradually down, and tertiary lobe nozzle 13 bottom is fixed in second grade go-between 321 top, bracing piece 312 bottom and base 22 fixed connection, and second grade hydraulic stem 322 top and second grade go-between 321 bottom fixed connection, under the effect of motor 35, all can contract to in the inner chamber of bracing piece 312 by first grade hydraulic stem 313 and second grade hydraulic stem 322.

The three-level height adjusting and controlling assembly 33 at the bottom of the four-level lobe nozzle 14 comprises a three-level connecting ring 331, a supporting rod 312, a first-level hydraulic rod 313, a second-level hydraulic rod 322 and a three-level hydraulic rod 332 which are sequentially arranged from bottom to top, the bottom of the four-level lobe nozzle 14 is fixed above the three-level connecting ring 331, the bottom of the supporting rod 312 is fixedly connected with the base 22, the top of the three-level hydraulic rod 332 is fixedly connected with the bottom of the three-level connecting ring 331, and the first-level hydraulic rod 313, the second-level hydraulic rod 322 and the third-level hydraulic rod 332 can be retracted into an inner cavity of the supporting rod 312 under the action of the motor 35.

In order to promote second grade lobe nozzle 12, tertiary lobe nozzle 13 and the motion stability of level four lobe nozzle 14 in the altitude mixture control process, still be equipped with two sets of one-level height control auxiliary members 37 bottom one-level go-between 311, one-level height control auxiliary members 37 includes auxiliary support rod 371 and establishes the one-level telescopic link 372 at its top, auxiliary support rod bottom and base 22 fixed connection, one-level telescopic link 372 top and one-level go-between 311 bottom fixed connection, one-level telescopic link 372 is the same with the length of one-level hydraulic stem 313, auxiliary support rod 371 is the same with the length of bracing piece 312, one-level telescopic link 372 can contract passively to in the auxiliary support rod 371 inner chamber.

Be equipped with two sets of second grade height control auxiliaries 38 bottom second grade go-between 321, second grade height control auxiliaries 38 includes from supreme auxiliary support pole 371 that sets gradually down, one-level telescopic link 372 and second grade telescopic link 381, auxiliary support pole 371 bottom and base 22 fixed connection, second grade telescopic link 381 top and second grade go-between 321 bottom fixed connection, the length of one-level telescopic link 372 and second grade telescopic link 381 is the same with the length of one-level hydraulic stem 313 and second grade hydraulic stem 322 respectively, auxiliary support pole 371 is the same with the length of bracing piece 312, one-level telescopic link 372 and second grade telescopic link 381 all can contract passively to the inner chamber of auxiliary support pole 371.

Be equipped with two sets of tertiary height regulation and control auxiliary members 39 bottom tertiary go-between 331, tertiary height regulation and control auxiliary members 39 include from supreme auxiliary support pole 371 that sets gradually down, one-level telescopic link 372, second grade telescopic link 381 and tertiary telescopic link 391, auxiliary support pole 371 bottom and base 22 fixed connection, tertiary telescopic link 391 top and tertiary go-between 331 bottom fixed connection, one-level telescopic link 372, the length of second grade telescopic link 381 and tertiary telescopic link 391 respectively with one-level hydraulic stem 313, the length correspondence of second grade hydraulic stem 322 and tertiary hydraulic stem 332 is the same, auxiliary support pole 371 is the same with the length of bracing piece 312, one-level telescopic link 372, both passive retractions of second grade telescopic link 381 and tertiary telescopic link 391 are to the inner chamber of auxiliary support pole 371.

The first level height control auxiliary 37, the second level height control auxiliary 38 and the third level height control auxiliary 39 are disposed at positions corresponding to each other, and in order to further ensure the stability of the movement process, as shown in fig. 1, the height control auxiliary is disposed at a side opposite to the height control assembly.

The control device judges the working condition of the gas turbine at the moment according to the smoke speed at the center of the flue measured by the flow meter 34, and drives the motor to adjust the position of the hydraulic rod, so that the height of the multi-stage lobe nozzle is positioned at the position suitable for the current working condition.

Specifically, the method comprises the following steps:

(1) when the working condition of the marine gas turbine is between 0 and 40 percent

When the flow meter 34 measures that the flow value of the flue gas is in a 0-40% working condition of the gas turbine at the moment, the main controller 36 drives the motor 35 to work, so that all the hydraulic rods and the telescopic rods are located at the lowest position, specifically as shown in fig. 1, and at the moment, the four lobe nozzles are located at the same height position;

(2) when the working condition of the marine gas turbine is between 40 and 65 percent

When the flow meter 34 measures that the flow value of the flue gas is in 40% -65% of the working condition of the gas turbine at the moment, the main controller 36 drives the motor 35 to control the primary hydraulic rods 313 on the primary height regulating component 31, the secondary height regulating component 32 and the tertiary height regulating component 33 to fully extend out, and drives the primary height regulating auxiliary component 31, the secondary height regulating auxiliary component 38 and the primary telescopic rods 372 on the tertiary height regulating auxiliary component 39 to fully extend out, specifically as shown in fig. 3, at the moment, the secondary lobe nozzle 12, the tertiary lobe nozzle 13 and the quaternary lobe nozzle 14 are located at the same height position and are all higher than the primary lobe nozzle 11;

(3) when the working condition of the marine gas turbine is between 65 and 85 percent

When the flow meter 34 measures that the flow numerical value of the flue gas is in a 65% -85% working condition of the gas turbine, the main controller 36 drives the motor 35 to control the primary hydraulic rod 313 of the primary height regulating and controlling component 31 to completely extend out, so as to drive the primary telescopic rod 372 on the primary height regulating and controlling auxiliary component 37 to completely extend out, and the primary hydraulic rod 313 and the secondary hydraulic rod 322 on the secondary height regulating and controlling component 32 and the tertiary height regulating and controlling component 33 to completely extend out, so as to drive the primary telescopic rod 372 and the secondary telescopic rod 381 on the secondary height regulating and controlling auxiliary component 38 and the tertiary height regulating and controlling auxiliary component 39 to completely extend out, specifically as shown in fig. 4, at this time, the secondary lobe nozzle 12 is higher than the primary lobe nozzle 11, and the tertiary lobe nozzle 13 and the quaternary lobe nozzle 14 are at the same height position and are higher than the secondary lobe nozzle 12;

(4) when the working condition of the marine gas turbine is between 85 and 100 percent

When the flow meter 34 measures that the flow rate value of the flue gas is in 85% -100% working condition of the gas turbine, the main controller 36 drives the motor 35 to control the primary hydraulic rod 313 of the primary height adjusting and controlling component 31 to completely extend out, and drives the primary telescopic rod 372 on the primary height adjusting and controlling auxiliary component 37 to completely extend out; the motor 35 simultaneously controls the primary hydraulic rod 313 and the secondary hydraulic rod 322 on the secondary height adjusting and controlling assembly 32 to completely extend out, and drives the primary telescopic rod 372 and the secondary telescopic rod 381 on the secondary height adjusting and controlling auxiliary part 38 to completely extend out; the primary hydraulic rod 313, the secondary hydraulic rod 322 and the tertiary hydraulic rod 332 on the motor-controlled tertiary height adjusting and controlling assembly 33 all extend out completely, and the primary telescopic rod 372, the secondary telescopic rod 381 and the tertiary telescopic rod 391 on the tertiary height adjusting and controlling auxiliary part 39 are all driven to extend out completely; specifically, as shown in fig. 5, the secondary lobe nozzle 12 is arranged higher than the primary lobe nozzle 11, and the tertiary lobe nozzle 13 is arranged higher than the secondary lobe nozzle 12; the four-stage lobe nozzle 14 is arranged higher than the three-stage lobe nozzle 13;

according to the use method, the injection device disclosed in the embodiment can adjust the use mode according to different working condition conditions, when the marine gas turbine is in a low-speed working condition and the mass flow of the flue gas is small, the flue gas is accelerated by the small lobe to improve the injection capacity of the low-speed working condition, and the requirement of cooling the box body under the low-speed working condition is met. Under the high-speed working condition and when the mass flow of the flue gas is larger, the flue gas is restrained from exceeding the required injection capacity through the speed reduction of the multi-stage lobe nozzle, the cooling requirement of a box body under the high-speed working condition is met, meanwhile, the working load of a gas turbine is reduced, and the pressure loss of an exhaust system is reduced.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.