WO2020082957A1

WO2020082957A1 - Miniature gas turbine electricity generator set

Info

Publication number: WO2020082957A1
Application number: PCT/CN2019/107386
Authority: WO
Inventors: 靳普; 于宁; 童江龙; 任立磊
Original assignee: 至玥腾风科技集团有限公司
Priority date: 2018-10-21
Filing date: 2019-09-24
Publication date: 2020-04-30
Also published as: CN109057968A

Abstract

A miniature gas turbine electricity generator set, comprising an electricity generator (1), a gas compressor (2), a turbine (3), a combustion chamber (4), and a nozzle (9). The electricity generator (1), the gas compressor (2), and the turbine (3) are mounted on a rotating shaft. An outlet of the nozzle (9) is inserted into the combustion chamber (4). An exhaust end of the gas compressor (2) is in communication with the combustion chamber (4). An exhaust end of the combustion chamber (4) is in communication with the turbine (3). Also comprised is a regenerator (5). Provided within the regenerator (5) are a first channel and a second channel separated from and tightly attached to each other. An inlet of the first channel is in communication with the exhaust end of the gas compressor (2). An outlet of the first channel is in communication with the combustion chamber (4). An inlet of the second channel is in communication with an exhaust end of the turbine (3). Air entering the combustion chamber (4) can be preheated via the regenerator (5) to increase the temperature of the air in the combustion chamber (4), thus increasing combustion efficiency, reducing the content of pollutants in exhaust, and at the same time, reducing the temperature of the exhaust discharged.

Description

Miniature gas turbine generator set

Technical field

The invention relates to the technical field of engine equipment, in particular to a micro gas turbine generator set.

Background technique

When the micro gas turbine generator set is working, it first continuously sucks air from the atmosphere through the compressor and compresses the air. The compressed air passes through the air passage or pipeline to lead it into the combustion chamber, and the gas atomized by the nozzle in the combustion chamber After mixing, it burns to generate high-temperature and high-pressure gas; the generated high-temperature and high-pressure gas then enters the turbine to expand and work, pushing the turbine to rotate and driving the compressor and generator to rotate together at high speed, which partially converts the chemical energy of the gas or liquid fuel into Mechanical work, and output electrical work.

Before the compressed air enters the combustion chamber, its temperature is increased only by compression, and no further heating is performed, which causes the temperature when it enters the combustion chamber is not high enough, which makes the combustion efficiency low and increases the concentration of pollutants in the exhaust gas; In addition, the high-temperature and high-pressure gas discharged from the turbine is generally discharged as tail gas.

In order to solve the above-mentioned problems, an additional regenerator is generally selected. The regenerators in the current technology are mostly circular and take up a lot of space; especially when they are used in vehicles, it is inconvenient to install and arrange. Another point is that the heat exchange efficiency and size of the regenerator in the current technology are fixed and cannot be assembled at will according to different heat exchange requirements. Only a regenerator can be redesigned, and the cost of the regenerator and the micro gas turbine generator is added.

Summary of the invention

The object of the present invention is to provide a micro gas turbine generator set with high combustion efficiency, low pollution, and small occupied space.

To achieve the above object, the present invention provides a micro gas turbine generator set, including a generator, a compressor, a turbine, a combustion chamber and a regenerator;

The generator, the compressor and the turbine are located in the casing and are fixedly installed on the rotating shaft in sequence. The regenerator has a flat structure and is sleeved outside the casing; the compressor The air inlet end communicates with the outside world, the air outlet end communicates with the inlet of the second medium channel of the regenerator, and the outlet of the second medium channel of the regenerator communicates with the air inlet end of the combustion chamber; The inlet end of the turbine is in communication, and the outlet end of the turbine is in communication with the inlet of the first medium channel of the regenerator, and the outlet of the first medium channel is in communication with the outside world.

Further, it also includes a flue gas duct, the inlet of the flue gas duct communicates with the outlet of the first medium channel, the outlet of the flue gas duct communicates with the outside world, and the flue gas duct and the regenerator The outer wall is snug.

Further, the outlet of the flue gas duct and the intake end of the compressor are arranged on the same side or opposite sides; preferably, the flue gas duct is arranged on at least any one of the four side surfaces of the regenerator.

Further, the rotating shaft includes a first rotating shaft and a second rotating shaft, the generator is disposed on the first rotating shaft, the compressor and the turbine are disposed on the second rotating shaft; the first The rotating shaft and the second rotating shaft are connected by a coupling.

Further, the coupling includes a shaft body and a clamping rib;

The clamping ridge is a protrusion formed to extend outward in the radial direction of the shaft body;

The protrusion is a strip-shaped structure, its extending direction is parallel to the axis of the shaft body, and its length matches the length of the shaft body;

One end of the first rotating shaft and one end of the second rotating shaft are provided with blind holes matched with the coupling; both ends of the coupling are respectively inserted into the two blind holes.

Further, the regenerator includes a housing and multiple heat exchange plates;

The housing includes an upper bottom surface, a lower bottom surface, and a side surface opposite to each other. A first opening and a second opening are respectively provided on the other opposite side surface. The first opening and the second opening form a penetration of the housing Channel; the lower bottom surface is provided with a parallel first bottom opening and a second bottom opening;

Each of the heat exchange plates includes a first heat exchange element, a second medium guide plate and a second heat exchange element that are fixedly connected in sequence. The structure of the first heat exchange element and the second heat exchange element are the same. A heat exchange element and a second heat exchange element both include a first medium guide plate I, a heat exchange fin and a first medium guide plate II which are fixedly connected in sequence;

The heat exchange fins of the first heat exchange element and the heat exchange fins of the second heat exchange element of adjacent heat exchange plates form a first medium channel; the heat exchange fins of the first heat exchange element of each heat exchange plate The heat exchange fins of the sheet and the second heat exchange element form a second medium channel; the first medium channel is provided with a first medium channel inlet and a first medium channel outlet, and the second medium channel is provided with a second medium channel inlet and a second Media channel exit;

A plurality of heat exchange plates fixedly connected in sequence are placed in the housing, the first medium channel inlet faces the first opening, the first medium channel outlet faces the second opening, and the second The medium channel inlet is open toward the first bottom, and the second medium channel outlet is open toward the second bottom.

Further, it includes a bearing lubrication system. The bearing lubrication system includes:

The first oil passage, the second oil passage, the first bearing and the second bearing coaxially arranged with the second rotating shaft, the bearing sleeve, the oil injection ring and the abutment device;

Along the axial direction of the second rotating shaft, the first bearing and the second bearing are arranged on the second rotating shaft at a predetermined interval, wherein the rotors of the first bearing and the second bearing are fixedly connected to the second rotating shaft , The stator is in contact with the inner surface of the bearing sleeve, the bearing sleeve is provided with a positioning stop, a side of the first bearing stator is in contact with a side of the positioning stop, and a side of the rotor is in contact with the positioning Component abutment;

Along the radial direction of the second rotating shaft, the oil injection ring is located between the bearing sleeve and the second rotating shaft, and the outer surface of the oil injection ring is in contact with the inner surface of the bearing sleeve, One side of the oil injection ring is in contact with one side of the stator of the second bearing;

Along the axial direction of the second rotating shaft, the abutment device abuts the other side of the positioning stop and the other side of the fuel injection ring;

The first oil passage penetrates the bearing sleeve, and its outlet faces the first bearing;

A second oil passage penetrates the bearing sleeve and the oil injection ring, and its outlet faces the second bearing.

Further, the abutment device is an elastic device or a spring.

Further, it includes a fuel supply device, the fuel supply device includes a nozzle and a nozzle sealing flange, the flange surface of the nozzle sealing flange is fixed to the inner wall of the casing, and the flange neck is fixed to the outer wall of the combustion chamber Connection; the nozzle body of the nozzle is fixedly connected to the inner wall of the combustion chamber, the channel formed by the outer wall of the combustion chamber and the inner wall of the combustion chamber communicates with the air inlet hole on the nozzle body, the nozzle body passes through the nozzle mounting hole of the casing in turn, nozzle sealing method Flange flange, flange neck of the nozzle sealing flange, placed inside the combustion chamber after the combustion chamber wall; the inner diameter of the flange neck of the nozzle sealing flange is larger than the outer diameter of the nozzle body, the method of the nozzle body and the nozzle sealing flange There is a gap between the blue plates.

Further, including a sealing ring, the nozzle includes a nozzle body and a nozzle flange that are fixedly connected or integrally formed; a nozzle mounting flange and a nozzle mounting hole matched with the nozzle flange are provided on the casing;

The nozzle mounting hole of the lower part of the nozzle body passing through the casing is placed in the casing; the fastener passes through the fastening holes of the nozzle flange and the nozzle mounting flange to connect the nozzle flange and the nozzle mounting method Blue

The nozzle body, the nozzle flange and the nozzle mounting flange form an annular sealing cavity, and the sealing ring is placed in the annular sealing cavity;

There is a gap between the nozzle flange and the nozzle mounting flange, and there is a gap between the nozzle body and the nozzle mounting hole.

The micro gas turbine generator set provided by the invention has the following beneficial technical effects:

(1) The micro gas turbine generator set of the present invention heats the high-pressure gas at the compressor outlet by heating the high-temperature gas discharged from the turbine outlet by setting a regenerator to increase the temperature of the high-pressure gas and improve the combustion efficiency while reducing the turbine The temperature of the exhaust gas reduces the pollution of the high-temperature exhaust gas to the air, and realizes the energy recovery of the high-temperature exhaust gas of the gas. In addition, the regenerator is provided as a flat-shaped shell, the flat-shaped shell and the connection parts make the The applied regenerator can be used as a heat exchange unit, and through the shell is provided with connecting parts for connecting two shells to each other, according to different heat exchange requirements, multiple heat exchange units can be assembled to realize the heat recovery The modular design of the heat exchanger avoids the problem of redesigning the regenerator for different heat exchange requirements in the prior art. In addition, the flat structure shell makes the micro gas turbine as a whole flat structure, easy to stabilize It is placed to solve the problem that the existing micro gas turbine cylinder shape is not easy to place, and it is more suitable for related transportation such as cars tool.

(2) The micro gas turbine generator set of the present invention is provided with an exhaust flue, so that the exhaust gas of the micro gas turbine is discharged in a predetermined direction, so that it can be flexibly applied to various scenarios, especially related vehicles such as automobiles.

(3) The micro gas turbine generator set of the present invention adopts a coupling with a clamping rib, and inserts both ends of the shaft body into the two shafts to be connected respectively, through the clamping provided on the side of the shaft body The convex ribs are adapted to engage with the two shafts to be connected to transmit rotational energy; processing, production and installation are relatively simple, saving time and cost; in addition, the length of the protrusion matches the length of the shaft body, which can increase the protrusion and The connection strength of the shaft body ensures the transmission of rotational energy.

(4). The micro gas turbine generator set of the present invention is provided with a bearing lubrication system, so that during the operation of the micro gas turbine, the rotation of the second rotating shaft, thermal expansion and contraction and other factors will cause the second bearing to be minute on the second rotating shaft The movement of the distance; the preload force of the elastic abutment device exerts an axial force on the fuel injection ring, so that the fuel injection ring always stays close to the second bearing, and the outlet of the oil path always faces the second bearing and provides the bearing Lubricating oil improves the utilization rate and lubricating effect of lubricating oil. In addition, the elastic abutment device applies a preload to the angular contact ball bearing, eliminating the axial clearance of the bearing, reducing noise and vibration during bearing operation, and improving bearing rigidity And bearing rotation accuracy. In addition, the oil return path is set to realize the recovery of lubricating oil, to avoid the leakage of lubricating oil and affect the performance of the whole machine.

(5) In the micro gas turbine generator set of the present invention, by providing a sealing structure in the fuel supply device, there is a gap between the nozzle flange and the nozzle mounting flange, and there is a gap between the nozzle body and the nozzle mounting hole; The gap value is reserved for deformation caused by vibration and temperature difference; it can avoid the reduction of service life due to deformation of the nozzle, casing and other related components.

BRIEF DESCRIPTION

Figure 1 is an overall front view of a micro gas turbine generator set in the present invention;

Figure 2 is a cross-sectional view taken along line A-A in Figure 1;

3 is an overall plan view of the micro gas turbine generator set of the present invention;

4 is a cross-sectional view taken along line C-C in FIG. 3;

Figure 5 is a perspective view of the coupling;

6 is a perspective view of a coupling of a preferred embodiment;

7 is a schematic diagram of the structure of a regenerator;

8 is a schematic structural diagram of a housing of a regenerator;

9 is a schematic diagram of the structure of the heat exchange plate;

10 is a schematic structural view of the first heat exchange element in the heat exchange plate;

11 is a schematic structural view of the second heat exchange element of the heat exchange plate;

12 is a cross-sectional view of two adjacent heat exchange plates;

Figure 13 is an enlarged view of part E in Figure 12;

14 is an enlarged view of part B in FIG. 2;

15 is an enlarged view of part D in FIG. 4.

Reference mark:

1. Generator, 2. Compressor, 3. Turbine, 4. Combustion chamber, 5. Regenerator, 6. First rotating shaft, 7, Second rotating shaft, 8, Coupling, 9, Nozzle, 10. Chassis, 11, seals, 12, nozzle sealing flange, 13, fasteners; 14, bearing sleeves, 15, oil injection ring, 16, abutment device, 17, first oil passage, 18, second oil Road, 19, fixed distance ring, 20, first bearing, 21, second bearing, 22, exhaust duct, 23, oil return path;

101, nozzle mounting flange; 102, lip;

110, housing, 111, first opening, 112, second opening, 113, first bottom opening, 114, second bottom opening;

120, heat exchange plate, 121, first heat exchange element, 122, second heat exchange element, 123, second medium guide plate, 124, first medium passage, 125, second medium passage;

1211, first medium deflector I, 1212, heat exchange fins, 1213, first medium deflector II;

1241, the first medium channel inlet, 1242, the first medium channel outlet;

1251, second medium channel inlet, 1252, second medium channel outlet;

141. First oil accumulation groove, 142, positioning stop, 143, positioning element, 144, lubricating oil supply pipe;

181, the first branch, 182, the second oil reservoir, 183, the oil hole;

231, the first oil return branch, 232, the second oil return branch, 233, the third oil return branch;

41. The outer wall of the combustion chamber, 42. The inner wall of the combustion chamber, 43. The inner and outer wall channels;

81. Shaft main body, 82, snap-fit convex edge, 83, rounded corner;

91. Nozzle body, 92, nozzle flange, 93, air inlet.

detailed description

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", The azimuth or positional relationship indicated by "radial", "circumferential", etc. is based on the azimuth or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the device or element referred to It must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise stated, "plurality" means two or more.

In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connected", "connected", and "abutment" should be understood in a broad sense, for example, it can be a fixed connection, It can also be a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two components. For those of ordinary skill in the art, the specific meaning of the above terms in the present invention can be understood in specific situations.

Please refer to FIG. 1 to FIG. 4, this embodiment provides a micro gas turbine generator set, which includes a generator 1, a compressor 2 and a turbine 3 which are coaxially connected and arranged in sequence, and the combustion chamber 4 is provided in the turbine 3 The end far away from the compressor 2; the generator 1, the compressor 2, the turbine 3 and the combustion chamber 4 are all arranged in the casing 10. The generator 1 and the compressor 2 are connected via a first rotating shaft 6, a second rotating shaft 7 and a coupling 8; two ends of the coupling 8 are connected to the first rotating shaft 6 and the second rotating shaft 7 respectively to realize the first rotating shaft 6 and The second rotating shaft 7 rotates synchronously.

When the micro gas turbine generator set is started from a static state, the starter is required to drive the micro gas turbine to rotate or the generator is set as a heuristic integrated motor, and the heuristic integrated motor is converted into an electric motor to drive the micro gas turbine to rotate, after being accelerated to be able to operate independently, Only the starter is disconnected or the heuristic integrated motor is converted into a generator.

During operation, the compressor 2 continuously draws air from the atmosphere and compresses the air. The compressed air passes through the air passage or pipeline to the combustion chamber 4 and atomizes in the combustion chamber 4 through the nozzle 9 The gas is mixed and burned to generate high-temperature and high-pressure gas; the generated high-temperature and high-pressure gas then enters the turbine 3 to expand and work, pushing the turbine 3 to rotate and driving the compressor 2 and the generator 1 to rotate together at high speed, realizing gas or liquid fuel The chemical energy is partly converted into mechanical work, and electrical work is output.

In the present invention, the compressor 2 and the turbine 3 are installed on the second rotating shaft 7, and the generator 1 is installed on the first rotating shaft 6. The first rotating shaft 6 and the second rotating shaft 7 are connected by a coupling 8 to realize the first A rotating shaft 6 and the second rotating shaft 7 rotate synchronously and transmit energy. As shown in FIG. 5, the coupling 8 includes a shaft body 81 and an engaging rib 82. The engaging rib 82 is provided on the side surface of the shaft body 81.

Specifically, the shaft main body 81 is made of metal and is a cylinder; the two round faces of the cylinder are called the bottom face, and the surrounding faces are called the side faces;

In use, grooves matching the coupling 8 are formed on the end surfaces of the two shafts to be connected, and the ends of the shaft main body 81 are inserted into the grooves provided on the two shafts to complete the installation. Processing, production and installation are relatively simple, saving time and cost.

In a preferred embodiment, the engaging rib 82 is a protrusion formed to extend outward in the radial direction of the shaft body 81. Specifically, the protrusion formed on the side surface of the cylinder extending outward in the radial direction of the cylinder is a clamping ridge 82. The shaft body 81 and the clamping rib 82 have an integrated structure, and can be finished by die casting.

The protrusion is a bar-shaped structure, and its extending direction is parallel to the axis of the shaft body 81; it can also be understood that the length direction of the bar-shaped structure is parallel to the axis of the shaft body 81.

In a preferred embodiment, the length of the protrusion matches the length of the shaft body 81, that is, the length of the protrusion is equal to the length of the shaft body 81, so as to increase the connection strength between the protrusion and the shaft body 81, thereby achieving The protrusion breaks during the rotation of energy.

The cross section of the protrusion or it is understood that the projection of the protrusion on a plane perpendicular to the axis of the shaft body 81 may be a polygon; specifically, a rectangle, a triangle, or the like.

In one embodiment, the surface of the protrusion away from the shaft body 81 is a curved surface; preferably, the projection of the protrusion on the surface perpendicular to the axis of the shaft body 81 is semicircular. The convex side is set as a curved surface to reduce wear during installation and rotation, and extend the service life of the coupling 8.

In order to improve the strength of the transmission after installation, in one embodiment, there are a plurality of protrusions, and the plurality of protrusions are evenly distributed on the side of the shaft body 81; the uniform distribution here is understood to be distributed at equal intervals. The evenly distributed clamping ribs 82 can evenly decompose the shearing force generated by the rotation to each clamping rib 82 when transmitting the rotational energy, to avoid the snapping rib 82 from breaking, thereby extending the coupling 8 service life.

Specifically, there are four protrusions, and the four protrusions are arranged on the side surface of the shaft body 81 in a cross shape.

For the convenience of installation, a rounded corner 83 is formed at the junction of the end surface of the shaft body 81 and its side surface, that is, a rounded corner 83 is formed at the junction between the end surface of the shaft main body 81 and its side surface; the connection between the raised end surface and the raised side surface is provided There is a rounded corner 83, that is, a rounded corner 83 is provided at the junction of the convex end face and the side face. The side surface of the protrusion refers to the side of the protrusion away from the shaft body 81. The protrusion and the rounded corner 83 provided on the shaft main body 81 can play a certain guiding role, which is convenient for inserting the protrusion into the shaft to be connected.

In a preferred embodiment, as shown in FIG. 6, the diameter of the middle section of the shaft body 81 is set to be smaller than the diameter of the front and rear sections of the shaft body. Specifically, the diameter of the middle section of the shaft body is 40% -60%, preferably 50% of the diameter of the front and rear sections of the shaft body. Set the diameter of the middle section of the shaft body to be smaller than the diameters of the front and back sections of the shaft body, and set the diameter of the portion of the blind hole where the shaft body is not inserted into the first and second shafts to be smaller than the blindness of the shaft body into the first and second shafts The diameter of the hole part, when the first rotating shaft and the second rotating shaft are not concentric, or when vibration occurs during rotation, the lower-cost coupling is preferentially damaged to avoid damage to the high-cost bearings connected to the first rotating shaft and the second rotating shaft.

This example discloses a transmission mechanism including a coupling as in the above-mentioned embodiment. Specifically, the first rotating shaft 6 and the second rotating shaft 7 are included. One end of the first rotating shaft 6 and one end of the second rotating shaft 7 are provided with blind holes matching the coupling 8; the two ends of the coupling 8 are respectively inserted In two blind holes.

In the specific installation and use, a blind hole matching the above-mentioned coupling 8 is opened for each end surface of the first rotating shaft 6 close to the second rotating shaft 7 and the end surface of the second rotating shaft 7 close to the first rotating shaft 6, only the coupling The two ends of the shaft device 8 are inserted into the blind holes opened on the first rotating shaft 6 and the second rotating shaft 7, respectively, to realize the connection of the first rotating shaft 6 and the second rotating shaft 7, so that the first rotating shaft 6 and the second rotating shaft 7 rotate synchronously .

The high-temperature and high-pressure gas discharged from the turbine 3 is generally discharged as tail gas. In order to improve the combustion efficiency of the combustion chamber 4, in the present invention, energy recovery is performed on the high-temperature exhaust gas.

7-13, this embodiment provides a regenerator. By setting the regenerator, the high-temperature gas discharged from the turbine outlet is used to heat the high-pressure gas at the compressor outlet to increase the temperature of the high-pressure gas and improve the combustion efficiency. At the same time, the temperature of the turbine exhaust is reduced, the pollution of high-temperature exhaust gas to the air is reduced, and the energy recovery of the high-temperature exhaust gas of the gas is realized. As shown in FIG. The hot plate 120 is fixedly disposed in the housing 110.

Specifically, as shown in FIG. 8, the housing includes an upper bottom surface, a lower bottom surface, and an opposite side surface, and a first opening 111 and a second opening 112 are respectively provided on the other opposite side surface, so that the first opening 111 and The second opening 112 forms a through channel of the housing; the first bottom opening 113 and the second bottom opening 114 are provided in parallel on the lower bottom surface, and the first bottom opening 113 and the second bottom opening 114 are respectively provided near both ends of the lower bottom surface. The shell is arranged in a block shape. Compared with the existing regenerator with a ring-shaped structure, it is easy to place smoothly and takes up a small volume, which is convenient for modular use. The flat-shaped structure and connection parts make the The applied regenerator can be used as a heat exchange unit, and through the shell is provided with connecting parts for connecting two shells to each other, according to different heat exchange requirements, multiple heat exchange units can be assembled to realize the heat recovery The modular design of the heat exchanger avoids the problem of redesigning the regenerator for different heat exchange requirements in the prior art. In addition, the flat structure shell makes the micro gas turbine as a whole flat structure, easy to stabilize It is placed to solve the problem that the existing miniature gas turbine cylinder shape is not easy to place. It is more suitable for vehicles such as automobiles and the flat structure of the heat exchange unit is easy to process and has a high yield. It solves the problem of regenerators Mass production issues have indirectly reduced manufacturing costs.

Specifically, as shown in FIG. 9, each heat exchange plate 120 includes a first heat exchange element 121, a second medium guide plate 123 (as shown in FIG. 11), and a second heat exchange element 122 that are fixedly connected in sequence. In this embodiment, the first heat exchange element 121 and the second heat exchange element 122 have the same structure; and the first heat exchange element 121 and the second heat exchange element 122 each include a first medium guide plate I 1211 that is fixedly connected in sequence The heat exchange fins 1212 and the first medium deflector II 1213 are shown in FIG. 10.

As shown in FIG. 12, it is a schematic sectional view of the heat exchange fins 1212 in two adjacent heat exchange plates 120, and FIG. 13 is an enlarged view of the part E in FIG. 12. As shown in FIG. 13, the heat exchange fins 1212 of the first heat exchange element 121 and the heat exchange fins 1212 of the second heat exchange element 122 of the adjacent heat exchange plate 120 form a first medium channel 124; as a preferred implementation For example, the heat exchange fins 1212 are formed into a corrugated shape. The peaks of the heat exchange fins 1212 of the first heat exchange element 121 and the second heat exchange element 122 of two adjacent heat exchange plates 120 are opposite to each other. The wave trough is opposed, and the channel opposite the wave trough is formed as the first medium channel 124. The heat exchange fins 1212 of the first heat exchange element 121 and the heat exchange fins 1212 of the second heat exchange element 122 of each heat exchange plate 120 form a second medium channel 125; as a preferred embodiment, the heat exchange fins The fins 1212 are formed in a corrugated shape. The peaks of the heat exchange fins 1212 of the first heat exchange element 121 and the second heat exchange element 122 of each heat exchange plate 120 are opposite to the wave peak, the wave valley is opposite to the wave valley, and the wave valley is opposite to the wave valley The channel is formed as the second medium channel 125. As shown in FIG. 9, the first medium channel 124 is provided with a first medium channel inlet 1241 and a first medium channel outlet 1242, and the second medium channel 125 is provided with a second medium channel inlet 1251 and a second medium channel outlet 1252. By providing the first medium deflector, the second medium deflector and the heat exchange fins, the first medium channel and the second medium channel are formed, so that the first medium and the second medium flow in different directions, which increases Heat exchange area improves heat exchange efficiency. By providing the second medium deflector 123, the first medium and the second medium flow in opposite directions, thereby further improving the heat exchange efficiency.

In a preferred embodiment, the first medium channel 124 and the second medium channel 125 are arranged in parallel.

A plurality of heat exchange plates 120 fixedly connected in sequence are placed in the housing 110, the first medium channel inlet 1241 faces the first opening 111, the first medium channel outlet 1242 faces the second opening 112, and the second medium channel inlet 1241 faces the first The bottom opening 113 and the second medium channel outlet 1242 face the second bottom opening 114. The above arrangement can cause the first medium and the second medium to flow in different directions.

Specifically, forty heat exchange plates 120 can be selected, and the forty heat exchange plates 120 are fixedly connected in sequence and placed in the housing 110. The number of heat exchange plates 120 can be set according to specific heat exchange requirements, and is not limited here.

In a preferred embodiment, the heat exchange plate 120 is trapezoidal, the first medium channel inlet 1241 and the first medium channel outlet 1242 are respectively arranged on the two waists of the trapezoid, the second medium channel inlet 1251 and the second medium channel outlet 1252 are set on the bottom of the trapezoid.

More specifically, the trapezoid is an isosceles trapezoid.

The heat-exchanging fins 1212 are corrugated heat-exchanging fins, which can be processed by a bending process or a stamping process.

In a preferred embodiment, the height of the first medium channel 124 is 0.15-3 mm; specifically, it may be 0.15 mm, 0.8 mm, 1 mm, 2.5 mm, or 3 mm. The height is the distance between the wave trough and the wave trough of the heat exchange fins 1212 that are opposed to the first heat exchange element 121 and the second heat exchange element 122 of two adjacent heat exchange plates 120.

In a preferred embodiment, the height of the second medium channel 125 is 0.1-2 mm; specifically, it may be 0.1 mm, 1 mm or 2 mm. This height is the distance between the troughs of the heat exchange fins 1212 of the first heat exchange element 121 and the second heat exchange element 122 of each heat exchange plate 120.

In a preferred embodiment, the plate thickness of the heat exchange fins 1212 is 0.02-2mm; specifically, it may be 0.02mm, 0.05mm, 0.1mm, 0.15mm, 0.2mm, 0.5mm, 1mm, 1.5mm or 2mm .

In a preferred embodiment, the distance from the crest to the trough of the corrugated heat exchange fin is 1.5-5 mm; specifically, it may be 1.5 mm, 2 mm, 3 mm, 4 mm, or 5 mm.

In a preferred embodiment, in order to realize the modular design of the regenerator 5, the housing includes connection parts for connecting the two housings with each other, which can be assembled according to different heat exchange requirements. A heat exchange unit realizes the modular design of the regenerator, avoiding the problem that the existing technology needs to redesign the regenerator for different heat exchange requirements.

Another embodiment of the present invention provides a micro gas turbine, as shown in FIG. 2, which includes a compressor 2, a combustion chamber 4, a turbine 3 and a regenerator 5 as in the above embodiment, a first medium channel inlet 1241 and The first medium channel outlet 1242 communicates with the outlet of the turbine 3 and the outside atmosphere, so as to reduce the temperature of the high-temperature gas flowing out of the turbine 3 and discharge it as exhaust gas outside the gas turbine. The second medium channel inlet 1251 and the second medium channel outlet 1252 communicate with the outlet of the compressor 2 and the inlet of the combustion chamber 4, respectively, to heat the gas compressed by the compressor and deliver it to the combustion chamber to increase the gas entering the combustion chamber Temperature, which in turn increases fuel utilization. As shown in FIG. 2, in a preferred embodiment, the smoke exhaust duct 22 is further included, and the smoke exhaust duct 22 has a flat structure. The flat structure can be understood as a rectangular or elliptical cross-sectional view perpendicular to the extending direction of the exhaust duct 22. The exhaust duct 22 is in close contact with the outer wall of the regenerator 5 and is located on at least any one of the four sides of the regenerator 5. Preferably, the smoke exhaust duct 22 is rectangular in a cross-sectional view perpendicular to the extending direction of the smoke exhaust duct 22, and the wall surface of the smoke exhaust duct 22 where the rectangular long side is located is in close contact with the outer wall of the regenerator 5. By setting the exhaust flue, the exhaust gas of the micro gas turbine is discharged according to a predetermined direction, so that it can be flexibly applied to various scenarios, especially related vehicles such as automobiles.

In the gas turbine work project, in order to ensure the relevant rotating parts, radial bearings are required. In order to ensure the normal operation of the bearings, a bearing lubrication system is required.

Referring to FIG. 14, this embodiment provides a bearing lubrication system. The bearing is preferably an angular contact ball bearing. The lubrication system includes a second rotating shaft 7, a first bearing 20, and a second bearing 21. The first bearing 20 and the second bearing Both bearings 21 have a stator and a rotor. On the second rotating shaft 7 and in the axial direction of the second rotating shaft 7, the first bearing 20 and the second bearing 21 are provided on the second rotating shaft 7 at a predetermined interval, and the rotors of the first bearing 20 and the second bearing 21 It is fixedly connected to the second rotating shaft 7; the bearing sleeve 14 is sleeved on the first bearing 20 and the second bearing 21, and its inner surface is in contact with the stators of the first bearing 20 and the second bearing 21.

The bearing sleeve 14 is provided with a positioning stop 142. The positioning stop 142 is provided near one end of the bearing sleeve 14. The positioning stop 142 is a protrusion extending inward from the inner surface of the bearing sleeve 14.

A side surface of the stator of the first bearing 20 abuts a side surface of the positioning stop 142, and a side surface of the rotor of the first bearing 20 abuts the positioning element 143 fixed on the second rotating shaft 7.

Along the radial direction of the second rotating shaft 7, the oil injection ring 15 is located between the bearing sleeve 14 and the second rotating shaft 7. The outer surface of the oil injection ring 15 is in contact with the inner surface of the bearing 14. One side of the stator of the second bearing 21 abuts;

Along the axial direction of the second rotating shaft 7, the abutment device 16 abuts the other side of the positioning stop 142 and the other side of the injection ring 5, that is, both ends of the abutment device 16 respectively contact the other side of the positioning stop 142 One side is in contact with the other side of the injection ring 15.

The first oil passage 17 is provided through the bearing sleeve 14 and its outlet faces the first bearing 20; the second oil passage 18 is provided through the bearing sleeve 14 and the oil injection ring 15 and its outlet faces the second bearing 21.

Specifically, the second oil passage 18 is composed of a first branch 181 and a second branch communicating with each other. The first branch 181 is provided in the bearing sleeve 14, and the second branch 181 is provided in the fuel injection ring 15. More specifically, a first branch 181 is provided in the bearing sleeve 14 and on the side close to the second bearing 21. The inlet of the first branch 181 communicates with the first oil accumulation groove 141, which is provided on the outer surface of the bearing sleeve 14. The first oil accumulation groove 141 is provided to store lubricating oil to provide sufficient lubrication for the bearing lubrication oil.

The first branch 181 is a vertically arranged through hole. In a preferred embodiment, the first branch 181 is a vertically arranged cylindrical hole.

In this embodiment, the oil injection ring 15 has a cylindrical cylindrical structure; the second branch includes a second oil accumulation groove 182 and an oil hole 183 that communicate in sequence.

Specifically, the outer wall of the fuel injection ring 15 is recessed inwardly to form a second oil accumulation groove 182. The second oil accumulation groove 182 has an annular structure and is provided along the outer periphery of the oil injection ring 15. The oil hole 183 penetrates the oil injection ring 15 and communicates with the second oil accumulation groove 182. Due to the high operating temperature of the second bearing, a large amount of lubricating oil and cooling are required. The ring-shaped second oil reservoir can store lubricating oil in advance, thereby continuously providing lubricating oil to the bearing and improving the effect of lubricating and cooling.

The width of the second oil accumulation groove 182 in the axial direction of the fuel injection ring 15 is larger than the diameter of the first branch 181 which is a cylindrical hole vertically provided on the bearing sleeve 14. During the working process, the rotation of the second rotating shaft and other factors will cause the bearing sleeve and the injection ring to move on the second rotating shaft at a small distance. The outlet width of the first branch is smaller than the inlet width of the second branch; When a small distance of displacement occurs, the first branch and the second branch are always in communication, and then continue to provide lubricating oil to the bearing to achieve lubrication and cooling.

In a preferred embodiment, there are multiple oil holes 183, which are distributed at equal intervals. Specifically, three oil holes 183 may be selected.

Specifically, the contact device 16 is an elastic device, preferably a spring.

A first oil accumulation groove 141 is formed on the outer surface of the bearing sleeve 14, and the first oil accumulation groove 141 communicates with the inlets of the lubricating oil supply pipe 144, the first oil passage 17, and the second oil passage 18, respectively.

In order to ensure the normal operation of the micro gas turbine, it is necessary to ensure that the compressor 2 and the turbine work at a predetermined position and a predetermined axial distance. In a preferred embodiment, the distance ring 19 is also included; the distance ring 19 is along the second axis of rotation 7 is set in the radial direction, the distance ring 19 is located between the second rotating shaft 7 and the abutment device 16 and fixedly connected to the second rotating shaft 7; and the distance ring 19 is located between the first bearing 20 and the second bearing 21 Both end surfaces of the distance ring 19 are in contact with the rotors of the first bearing 20 and the second bearing 21, respectively. By setting a distance ring, axial positioning is achieved to avoid that the distance between the first bearing and the second bearing is less than the predetermined distance, which causes the first branch and the second branch to not be fully connected, resulting in insufficient lubricant supply.

In order to improve the fluidity of the lubricating oil and increase the lubrication and cooling effect, an oil return system was also added.

Specifically, the oil return system includes a first oil return branch 231, a second oil return branch 232, a third oil return branch 233 and an oil return path 23, a first oil return branch 231, and a second oil return branch 232 and one end of the third oil return branch 233 communicate with one end of the oil return path 23, the other end of the first oil return branch 231 communicates with the outer surface of the first bearing 20, and the other end of the second oil return branch 232 One end passes through the bearing sleeve 14 to communicate with the inner cavity of the bearing sleeve 14, the third oil return branch 233 communicates with the outer surface of the second bearing 21, and the other end of the oil return path 23 communicates with the recovery oil drum, by providing an oil return system In order to prevent lubricating oil from flowing into one end of the turbine, it will be burned by high-temperature gas, and carbon deposits will be generated, which will cause the performance of the whole machine to decrease and the exhaust pollution to increase.

The specific working process of the bearing lubrication system is as follows: the lubricating oil supply pipe 144 supplies lubricating oil into the first oil reservoir 141; since the inlets of the first oil passage 17 and the second oil passage 18 both communicate with the first oil reservoir 141 Therefore, the lubricating oil can be continuously sent to the first oil passage 17 and the second oil passage 18; furthermore, the lubricating oil can be continuously supplied to the first bearing 20 and the second bearing 21 to reduce the first bearing 20 and the second bearing 21 Friction and temperature. The lubricating oil discharged from the first bearing 20 and the second bearing 21 flows through the first oil return branch 231, the second oil return branch 232, the third oil return branch 233, and the oil return path 23 to the recovery tank.

During the working process, the rotation of the second rotating shaft and other factors will cause the second bearing to move a small distance on the second rotating shaft; the preload force of the elastic abutment device exerts an axial force on the fuel injection ring to make the fuel injection The ring always keeps close to the bearing, and the outlet that reaches the oil path always faces the bearing, and provides lubricating oil to the bearing to improve the utilization rate and lubricating effect of the lubricating oil. In addition, the elastic abutment device applies a preload to the angular contact ball bearing, eliminating the axial clearance of the bearing, reducing noise and vibration during bearing operation, and improving bearing rigidity and bearing rotation accuracy. In addition, the oil return path is set to realize the recovery of lubricating oil, to avoid the leakage of lubricating oil and affect the performance of the whole machine.

In addition, during the working process, the combustion chamber 4 and the turbine 3 not only have a high operating temperature, but also withstand the thermal shock caused by the drastic temperature change when the gas turbine is started and stopped, and the working conditions are poor. And since one end of the nozzle 9 is connected to the fuel supply device, and one end is inserted into the combustion chamber 4; therefore, the nozzle 9 and the casing 10 need to be sealed.

Specifically, as shown in FIG. 15, the nozzle sealing structure includes a nozzle 9, a casing 10 and a sealing ring 11.

Specifically, the nozzle 9 includes a nozzle body 91 and a nozzle flange 92 that are fixedly connected or integrally formed.

The casing 10 is provided with a nozzle mounting flange 101 and a nozzle mounting hole that are fitted with the nozzle flange 92.

The lower part of the nozzle body 91 passes through the nozzle mounting hole of the casing 10 and is placed in the casing 10; the fastener 13 passes through the fastening holes of the nozzle flange 92 and the nozzle mounting flange 101 to connect the nozzle flange 92 and the nozzle mounting flange 101.

Nozzle body 91, nozzle flange 92 and nozzle mounting flange 101 form an annular sealing cavity, and sealing ring 11 is placed in the annular sealing cavity; there is a gap between nozzle flange 92 and nozzle mounting flange 101, which is the nozzle flange 92 and the gap between the nozzle mounting flange 101 up and down; there is a gap between the nozzle body 91 and the nozzle mounting hole, the gap is the gap between the nozzle body 91 and the nozzle mounting hole in the circumferential direction.

Specifically, the outer diameter of the fastener 13 is smaller than the fastening holes on the nozzle flange 92 and the nozzle mounting flange 101, so that between the fastener 13 and the fastening holes on the nozzle flange 92 and the nozzle mounting flange 101 Form a gap.

In a preferred embodiment, the height of the seal cavity is smaller than the height of the elastic seal 11;

And / or the width of the seal cavity is smaller than the width of the elastic seal 11.

In a preferred embodiment, the gap between the nozzle flange 92 and the nozzle mounting flange 101 is 0.1-0.2 mm; specifically, it may be 0.1 mm, 0.15 mm or 0.2 mm.

And / or the gap between the nozzle body 91 and the nozzle mounting hole is 0.1-0.2 mm on one side; specifically, it may be 0.1 mm, 0.15 mm or 0.2 mm.

The sealing ring 11 may be an elastic sealing ring or a graphite sealing ring. The sealing ring 11 is a lip-shaped sealing ring, and the lip 102 of the lip-shaped sealing ring faces the cabinet 10.

In a preferred embodiment, the annular seal cavity and the seal ring 11 are trapezoidal in cross section.

The setting of the above gaps can avoid a small amount of relative displacement between the combustion chamber and the casing caused by the vibration of the micro gas turbine generator set and the temperature difference between the inside and outside of the combustion chamber; however, the existence of the gap will cause the nozzle and the casing to be tightly sealed. As a result, a sealing ring is provided in the sealing cavity surrounded by the nozzle flange, the nozzle mounting flange and the nozzle body to play a sealing role.

The invention aims to provide a miniature gas turbine generator set, including a generator, a compressor and a turbine, a combustion chamber and a nozzle; the generator, the compressor and the turbine are installed on a rotating shaft; the nozzle The outlet end is inserted into the combustion chamber; the exhaust end of the compressor communicates with the combustion chamber, and the exhaust end of the combustion chamber communicates with the turbine; it also includes a regenerator; the regenerator It has a first channel and a second channel that are isolated from each other and are close to each other; the inlet of the first channel communicates with the exhaust end of the compressor, and the outlet of the first channel communicates with the combustion chamber; the first The inlet of the second channel communicates with the exhaust end of the turbine. Through the regenerator, the air entering the combustion chamber can be preheated to increase the temperature of the air entering the combustion chamber, thereby improving the combustion efficiency and reducing the content of pollutants in the exhaust; at the same time, it can also reduce the temperature of the exhaust.

In the description of this specification, reference to the descriptions of the terms "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" is meant to be combined with the implementation The specific features, structures, materials, or characteristics described in the examples or examples are included in at least one embodiment or example of the present invention. In this specification, the schematic expression of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art may understand that various changes, modifications, replacements, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, The scope of the invention is defined by the claims and their equivalents.

Claims

A micro-gas micro-gas turbine generator set, including a generator (1), a compressor (2), a turbine (3), a combustion chamber (4) and a regenerator (5);

The generator (1), the compressor (2) and the turbine (3) are located in the casing (10) and are fixedly installed on the rotating shaft in sequence, and the regenerator (5) has a flat structure , Sleeved outside the casing (10); the inlet end of the compressor (2) communicates with the outside world, and the outlet end communicates with the inlet (1251) of the second medium channel of the regenerator. The two medium channel outlet (1252) is in communication with the intake end of the combustion chamber; the exhaust end of the combustion chamber is in communication with the intake end of the turbine (3), and the exhaust end of the turbine (3) is connected with the recuperation The first medium channel inlet (1241) of the device communicates, and the first medium channel outlet (1242) communicates with the outside world.
The micro gas turbine generator set according to claim 1, further comprising a flue gas duct (22), an inlet of the flue gas duct (22) communicates with an outlet (1242) of the first medium channel, the The outlet of the smoke exhaust duct (22) communicates with the outside world, and the smoke exhaust duct (22) is in close contact with the outer wall of the regenerator (5).
The micro gas turbine generator set according to claim 1, characterized in that the outlet of the exhaust duct (22) and the inlet end of the compressor (2) are set on the same side or opposite sides; preferably, the exhaust duct (22) ) Is provided on at least any one of the four sides of the regenerator (5).
The micro gas turbine generator set according to claim 1, characterized in that the rotating shaft includes a first rotating shaft (6) and a second rotating shaft (7), and the generator (1) is disposed on the first rotating shaft (6) ), The compressor (2) and the turbine (3) are provided on the second rotating shaft (7); the first rotating shaft (6) and the second rotating shaft (7) pass through a coupling ( 8) Connect.
The micro gas turbine generator set according to claim 4, characterized in that: the coupling (8) includes a shaft body (81) and a clamping rib (82);

The clamping rib (82) is a protrusion formed to extend outward in the radial direction of the shaft body (81);

The protrusion is a strip-shaped structure, and its extending direction is parallel to the axis of the shaft body (81), and its length matches the length of the shaft body (81);

One end of the first rotating shaft (6) and one end of the second rotating shaft (7) are provided with blind holes matching the coupling; the two ends of the coupling (8) are respectively inserted in Two of the blind holes.
The micro gas turbine generator set according to claim 1, wherein the regenerator (100) includes a casing (110) and a plurality of heat exchange plates (120);

The housing includes an upper bottom surface, a lower bottom surface, and an opposite side surface, and the other opposite side surface is respectively provided with a first opening (111) and a second opening (112), the first opening (111) and the first opening Two openings (112) form a through channel of the housing; the lower bottom surface is provided with a parallel first bottom opening (113) and a second bottom opening (114);

Each of the heat exchange plates (120) includes a first heat exchange element (121), a second medium guide plate (123) and a second heat exchange element (122) fixedly connected in sequence, the first heat exchange element (121) and the second heat exchange element (122) have the same structure, and the first heat exchange element (121) and the second heat exchange element (122) each include a first medium guide plate I (1211) fixedly connected in sequence , Heat exchange fins (1212) and first medium deflector II (1213);

The heat exchange fins (1212) of the first heat exchange element (121) and the heat exchange fins (1212) of the second heat exchange element (122) of the adjacent heat exchange plate (120) form a first medium channel (124) The heat exchange fins (1212) of the first heat exchange element (121) and the heat exchange fins (1212) of the second heat exchange element (122) of each of the heat exchange plates (120) form a second medium channel (125); the first medium channel (124) is provided with a first medium channel inlet (1241) and a first medium channel outlet (1242), the second medium channel (125) is provided with a second medium channel inlet (1251) and the first Two medium channel outlet (1252);

A plurality of heat exchange plates (120) fixedly connected in sequence are placed in the housing (110), the first medium channel inlet (1241) faces the first opening (111), the first medium The channel outlet (1242) faces the second opening (112), the second media channel inlet (1241) faces the first bottom opening (113), and the second media channel outlet (1242) faces the second bottom Opening (114).
The micro gas turbine generator set according to claim 1, characterized in that it includes a bearing lubrication system, and the bearing lubrication system includes:

The first oil passage (17), the second oil passage (18), the first bearing (20) and the second bearing (21), the bearing sleeve (14) and the oil injection ring arranged coaxially with the second rotating shaft (7) (15) and abutment device (16);

In the axial direction of the second rotating shaft (7), the first bearing (20) and the second bearing (21) are arranged on the second rotating shaft (7) at a predetermined interval, wherein the first bearing (20) ) And the rotor of the second bearing (21) are fixedly connected to the second rotating shaft (7), the stator abuts against the inner surface of the bearing sleeve (14), and the bearing sleeve (14) is provided with a positioning stop ( 142), a side of the stator of the first bearing (20) abuts a side (142) of the positioning stop, a side of the rotor and a positioning element (143) fixed on the second rotating shaft (7) Abut;

In the radial direction of the second rotating shaft (7), the oil injection ring (15) is located between the bearing sleeve (14) and the second rotating shaft (7), the oil injection ring (15) ) The outer surface of the bearing sleeve (14) is in contact with the inner surface of the bearing sleeve (14), a side of the injection ring (15) is in contact with a side of the stator of the second bearing (21);

In the axial direction of the second rotating shaft (7), the abutment device (16) abuts the other side of the positioning stop (142) and the other side of the fuel injection ring (15);

The first oil passage (17) penetrates the bearing sleeve (14), and its outlet faces the first bearing (20);

A second oil passage (18) penetrates the bearing sleeve (14) and the fuel injection ring (15), and its outlet faces the second bearing (21).
The micro gas turbine generator set according to claim 7, wherein the abutment device (16) is an elastic device or a spring.
The micro gas turbine generator set according to claim 1, characterized by comprising a fuel supply device, the fuel supply device comprising a nozzle (9) and a nozzle sealing flange (12), the nozzle sealing flange (12) The flange surface is fixed to the inner wall of the casing (10), and the flange neck is fixedly connected to the outer wall of the combustion chamber (41); the nozzle body (91) of the nozzle (9) is fixedly connected to the inner wall of the combustion chamber (42), The inner and outer wall passages (43) formed by the outer wall (41) of the combustion chamber and the inner wall (42) of the combustion chamber communicate with the air intake hole (93) on the nozzle body (91), and the nozzle body (91) sequentially passes through the casing ( 10) Nozzle mounting hole, nozzle sealing flange (12) flange plate, nozzle sealing flange (12) flange neck, and combustion chamber inner wall (42) are placed in the combustion chamber (4); nozzle sealing method The inner diameter of the flange neck of the blue (12) is larger than the outer diameter of the nozzle body (91), and there is a gap between the nozzle body (91) and the flange of the nozzle sealing flange (12).
The micro gas turbine generator set according to claim 9, characterized in that it includes a sealing ring (11), and the nozzle (9) includes a nozzle body (91) and a nozzle flange (92) that are fixedly connected or integrally formed; The machine casing (10) is provided with a nozzle mounting flange (101) and a nozzle mounting hole matched with the nozzle flange (92);

The lower part of the nozzle body (91) passes through the nozzle mounting hole of the casing (10) and is placed in the casing (10); the fastener (13) passes through the nozzle flange (92) and the nozzle installation method The fastening hole of the blue (101) connects the nozzle flange (92) and the nozzle mounting flange (101);

The nozzle body (91), the nozzle flange (92) and the nozzle mounting flange (101) form an annular sealing cavity, and the sealing ring (11) is placed in the annular sealing cavity;

There is a gap between the nozzle flange (92) and the nozzle mounting flange (101), and there is a gap between the nozzle body (91) and the nozzle mounting hole.