CN214366396U

CN214366396U - Miniature gas turbine

Info

Publication number: CN214366396U
Application number: CN202022616892.1U
Authority: CN
Inventors: 靳普
Original assignee: Individual
Current assignee: Liu Muhua
Priority date: 2020-11-13
Filing date: 2020-11-13
Publication date: 2021-10-08
Anticipated expiration: 2030-11-13

Abstract

A micro gas turbine comprises a combustion chamber, a heat exchanger, an air compressor, a Tesla turbine and a starting integrated motor, wherein the heat exchanger is a multi-cavity heat exchange device and comprises at least two heat exchange units, each heat exchange unit comprises an input plate and an output plate, the side surfaces of the input plate and the output plate are hermetically connected through a buckling device, and a heat exchange cavity is defined between a pair of adjacent input plates and output plates. The utility model discloses a miniature gas turbine can solve current tesla turbine pressure drop ratio and hang down, easily causes loss of pressure, the problem of system inefficiency, simultaneously, solves the problem that current heat exchanger temperature gradient is big, easy spalling.

Description

Miniature gas turbine

Technical Field

The utility model belongs to a gas turbine technical field, concretely relates to miniature gas turbine.

Background

The existing heat exchanger is composed of two parallel plates with large area, and the temperature gradient from the inlet end to the outlet end of the heat exchange plate is large due to heat exchange with a combustion chamber; because the area of the heat exchange plate is large, the periphery of the plate has no constraint force, and the plate is easy to be burst from the middle part due to the large air pressure in the plate. The two sides of an upper plate and a lower plate of a heat exchange plate of a traditional heat exchanger are welded or riveted, and the welding seam is long due to overlong plates, so that air leakage is easy to occur, and the process requirement is high. Therefore, the service life of the existing heat exchanger is limited, the heat exchanger is difficult to stably operate for a long time under working conditions such as the field and the like, and the manufacturing and maintenance costs are high.

Further, a tesla turbine is a bladeless, fluid shear driven turbine, which is referred to as a bladeless turbine. Tesla turbines use boundary layer effects, where the fluid is influenced by viscous forces and forms a very thin boundary layer at the edge of the pipe wall or other object, where the velocity of a stationary surface is 0 and increases further from the surface. By utilizing the effect, the liquid moving at high speed can drive a group of turntables to rotate. The mechanical efficiency of a tesla turbine can reach 95%, which is much higher than that of a conventional blade turbine. However, the pressure drop ratio of the existing tesla turbine is difficult to break through 2, namely, the gas compressor pressurizes gas, and high-pressure gas has large pressure loss after acting on the turbine, so when the tesla turbine is used in systems such as power generation or heating, the thermal efficiency is not high, and energy waste is caused.

Disclosure of Invention

The technical solution problem of the utility model is that: the defects of the prior art are overcome, the micro gas turbine is provided, the problems that the existing Tesla turbine is low in pressure drop ratio, pressure loss is easy to cause, and system efficiency is low can be solved, and meanwhile, the problems that an existing heat exchanger is large in temperature gradient and easy to spall are solved.

The technical solution of the utility model is that: a micro gas turbine comprises a combustion chamber, a heat exchanger, an air compressor, a Tesla turbine and a starting integrated motor, wherein the heat exchanger is a multi-cavity heat exchange device and comprises at least two heat exchange units, each heat exchange unit comprises an input plate and an output plate, the side surfaces of the input plate and the output plate are hermetically connected through a buckling device, and a heat exchange cavity is defined between a pair of adjacent input plates and output plates.

Furthermore, fins are arranged on the inner walls of the input plate and the output plate in the heat exchange cavity.

Further, the fins are integrally formed with the input plate or the output plate; alternatively, the first and second electrodes may be,

the fins are fixed to the input plate or the output plate.

Further, the fins are wave-shaped plates or straight plates.

Furthermore, the buckling device comprises a first surrounding baffle, a second surrounding baffle and a side wall perpendicular to the first surrounding baffle, the second surrounding baffle and the side wall are parallel to each other, the cross sections of the first surrounding baffle, the second surrounding baffle and the side wall form a concave shape, and the edges of the input plate and the output plate are embedded into a clamping groove formed among the first surrounding baffle, the second surrounding baffle and the side wall.

Further, the tesla turbine is a tandem tesla turbine comprising at least two tesla turbine units disposed on a rotating shaft and at least two radial bearings;

the Tesla turbine unit comprises: the shell is arranged on the rotating shaft, and a medium inlet and a medium outlet are formed in the shell; the rotating shafts are arranged on the rotating shafts, the rotating shafts are fixedly connected with the rotating shafts, gaps are formed between every two adjacent rotating disks in the rotating shafts, and exhaust holes are uniformly distributed around the center on each rotating disk in the rotating shafts;

the at least two radial bearings are arranged on the rotating shaft;

the medium outlet of the upper stage tesla turbine unit communicates with the medium inlet of the lower stage tesla turbine unit.

Further, the series Tesla turbine comprises a motor, and a rotating shaft of the motor is connected with the rotating shaft through a coupler; alternatively, the first and second electrodes may be,

the rotating shaft of the motor is the rotating shaft.

Further, the tesla turbine is a multistage tesla turbine comprising at least two tesla turbine units;

the Tesla turbine unit comprises: the device comprises a rotating shaft, at least two radial bearings and a shell arranged on the rotating shaft and the at least two radial bearings, wherein a medium inlet and a medium outlet are formed in the shell; the rotating shafts are arranged on the rotating shafts, the rotating shafts are fixedly connected with the rotating shafts, gaps are formed between every two adjacent rotating disks in the rotating shafts, and exhaust holes are uniformly distributed around the center on each rotating disk in the rotating shafts; the at least two radial bearings are arranged on the rotating shaft; the medium outlet of the upper stage tesla turbine unit communicates with the medium inlet of the lower stage tesla turbine unit.

Further, each Tesla turbine unit comprises a motor, and a rotating shaft of the motor is connected with the rotating shaft through a coupling; alternatively, the first and second electrodes may be,

the rotating shaft of the motor is the rotating shaft.

Compared with the prior art, the utility model the advantage lie in:

1. the utility model discloses a miniature gas turbine, its heat exchanger make a plurality of (2 at least) less heat transfer cavitys with a great heat transfer cavity, couple together less heat transfer cavity, and deformation between two big boards turns into the little deformation of multi-disc platelet to add the pretightning force at the middle part of board, reduce and warp, ensure long-life, high reliability. It should be noted that the utility model discloses the heat transfer board is not simply reducing the size, but to arbitrary traditional heat transfer board, the utility model discloses the heat transfer board size all reduces to one tenth or one dozen on its original, due design size basis.

2. The utility model discloses a micro gas turbine, the increase of its heat exchanger heat transfer cavity makes temperature gradient reduce between the adjacent board, refers to fig. 4, reduces the atmospheric pressure in the single cavity, prevents the spalling.

3. The utility model discloses a miniature gas turbine, its heat exchanger adopt multi-chamber formula heat transfer board, can make the welding seam shorten, simple process and difficult gas leakage.

4. The utility model discloses a miniature gas turbine, its heat exchanger pressure head exert pressure in the direction of perpendicular to heat transfer board, prevent that the heat transfer board from preventing the spalling because of receiving the protruding deformation of atmospheric pressure effect, improving device life, reduce the maintenance cost.

5. The utility model discloses a miniature gas turbine, its Tesla turbine fall pressure ratio is high, reduces the pressure drop loss, and the system is overall efficient.

6. The utility model discloses a miniature gas turbine, the gas after its tesla turbine compression can obtain make full use of, but the energy saving.

7. The utility model discloses a miniature gas turbine, the medium entry of every grade tesla turbine unit of its tesla turbine sets up the nozzle, has increased the gas flow rate.

8. The utility model discloses a miniature gas turbine, its multistage tesla turbine are at the micron order for serial-type tesla turbine axle clearance, and the assembly difficulty hardly guarantees the axiality, assembles the complicated condition of operation, the utility model discloses a multistage tesla turbine easily guarantees the axiality, avoids the error accumulation, and the assembly is simple.

9. The Tesla turbine of the micro gas turbine of the utility model is especially suitable for small motors (such as 1KW), and has higher dimensional precision; the manufacturing work and the assembly process are simple; but the modularization production, production efficiency is high.

10. The utility model discloses a miniature gas turbine, its tesla turbine carousel both sides face sets up spiral air groove, realizes the quick through-flow of carousel both sides air, both can conduct gas, can prevent air blockage again, gather.

Drawings

FIG. 1 is a schematic view of a micro gas turbine according to the present invention;

FIG. 2 is a schematic view of a heat exchange unit of the micro gas turbine of the present invention, in which the fins of the heat exchanger are wave-shaped plates;

FIG. 3 is a schematic structural view of a heat exchange unit in which fins of a heat exchanger are straight plates in a micro gas turbine according to the present invention;

FIG. 4 is a schematic end view of one embodiment of a heat exchanger for a micro gas turbine according to the present invention;

FIG. 5 is a schematic cross-sectional view of one embodiment of a heat exchanger in a micro gas turbine according to the present invention;

FIG. 6 is a schematic end view of another embodiment of a heat exchanger for a micro gas turbine according to the present invention;

fig. 7 is a schematic cross-sectional view of another embodiment of a heat exchanger in a micro gas turbine according to the present invention.

FIG. 8 is a schematic view of a tandem Tesla turbine according to the present invention;

FIG. 9 is a schematic view of a first stage Tesla turbine unit of a tandem Tesla turbine in a micro gas turbine according to the present invention;

FIG. 10 is a schematic illustration of the turbine inlet and outlet path in the top view of FIG. 8;

FIG. 11 is a schematic view of a multi-stage Tesla turbine according to the present invention;

FIG. 12 is a schematic view of a single Tesla turbine unit of a multistage Tesla turbine according to the present invention;

FIG. 13 is a schematic view of the turbine inlet and outlet path from the top of FIG. 11;

fig. 14 is a schematic view of an air groove provided in a rotor disk of a turbine according to the present invention.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

A micro gas turbine comprises a combustion chamber 105, a heat exchanger 101, an air compressor 102, a Tesla turbine 100 and an ignition and integration type motor 103. The external air is introduced into the compressor 102 to be pressurized and then enters the heat exchanger 101, the heat exchanger 101 is heated, the introduced air is heated and then introduced into the combustion chamber 105, the gas after being combusted in the combustion chamber 105 pushes the Tesla turbine 100 to do work, and the gas exhausted after being done in the Tesla turbine 100 and the gas pressurized by the compressor 102 can be introduced into the heat exchanger 101 again to be circulated. The starting integrated motor 103 can be used as a motor to drive the compressor to rotate, and the compressor can be separated from the compressor after the compressor can work independently and used as a motor to be driven by the rotating shaft of the tesla turbine 100 to generate power.

For the heat exchanger, the heat exchanger is multi-chamber formula heat transfer device, and it makes a plurality of (2 at least) less heat transfer cavitys with a great heat transfer cavity, couples together less heat transfer cavity, and the deformation between two big boards turns into the little deformation of multi-disc platelet to add the pretightning force in the middle part of board, reduce and warp, ensure long-life, high reliability. It should be noted that the utility model discloses the heat transfer board is not simply reducing the size, but to arbitrary traditional heat transfer board, the utility model discloses the heat transfer board size all reduces to one tenth or one dozen on its original, due design size basis. As shown in fig. 2 to 7, the multi-cavity heat exchange device includes at least two heat exchange units, each heat exchange unit includes an input plate 10 and an output plate 20, the side surfaces of the input plate 10 and the output plate 20 are hermetically connected by a fastening device 30, and a heat exchange cavity 50 is defined between a pair of adjacent input plates 10 and output plates 20.

Fins 11 are arranged on the inner walls of the input plate 10 and the output plate 20 in the heat exchange cavity 50; the fins 11 are integrally formed with the input plate 10 or the output plate 20; alternatively, the fin 11 is fixed to the input plate 10 or the output plate 20. Preferably, the fins 11 are wave-shaped plates or straight plates. The fins 11 can increase the residence time of the gas in the heat exchange cavity, so that the gas can exchange heat sufficiently.

The buckling device 30 comprises a first surrounding barrier 31, a second surrounding barrier 32 and a side wall 33 perpendicular to the first surrounding barrier, the first surrounding barrier 31, the second surrounding barrier 32 and the side wall 33 are in a concave shape in cross section, and the edges of the input plate 10 and the output plate 20 are embedded into a clamping groove 34 formed among the first surrounding barrier 31, the second surrounding barrier 32 and the side wall 33. Screw holes are formed in the tops of the first enclosing barrier 31 and the second enclosing barrier 32, a pressure head 40 is arranged on the outer sides of the input plate 10 and the output plate 20, one end of the pressure head 40 is attached to the input plate 10 or the output plate 20, the other end of the pressure head is fixed to a cross beam 41, and adjusting bolts are arranged at two ends of the cross beam 41. The adjusting bolt is in threaded connection with the screw hole and is used for adjusting the pre-tightening force of the pressure head on the input plate and the output plate.

Preferably, the heat exchange units are stacked, and a sealing plate 35 is arranged between adjacent heat exchange units and between the fastening devices 30 for sealing.

Preferably, the cross section of the heat exchange device is rectangular, fan-shaped or cylindrical. When the input board 10 and the output board 20 have circular cross sections, the fastening device 30 is a disc-shaped flange, referring to fig. 6 and 7, the first enclosing barrier 31 and the second enclosing barrier 32 are mutually parallel circular shells protruding from the end faces of the flange, and the clamping groove 34 is defined between two adjacent circular shells and the end faces of the flange. When the heat exchange plate is installed, the input plate 10 and the output plate 20 of the present invention are installed outwards gradually from the axis.

Preferably, when the heat exchange device is arranged to receive solar heating, the part of the outer surface of the heat exchange device which does not receive reflected light is covered with the water tank to reduce heat loss.

Preferably, the utility model discloses a multi-chamber formula heat transfer device is applicable to heat transfer occasions such as light and heat, nuclear energy.

The processing method of the multi-cavity heat exchange device comprises the following steps:

s100), fixing the input plate 10 or the output plate 20 on a 3D printer workbench, starting the 3D printer loaded with the fin model, adjusting the printing direction and position, and printing the fins 11 one by one;

alternatively, the first and second electrodes may be,

starting a 3D printer loaded with an input plate 10 or output plate 20 model with fins 11 on a workbench, adjusting the printing direction and position, and printing the input plate 10 and output plate 20 with fins 11;

alternatively, the first and second electrodes may be,

processing an input plate 10 and an output plate 20 with fins 11 on an original plate by electric spark cutting or chemical etching or linear cutting;

s200), the input plate 10 is opposite to the output plate 20, the fins 11 are positioned in the heat exchange cavity 50, the edges of the input plate 10 and the output plate 20 are clamped in the clamping grooves 34, and the adjacent input plate 10 and the output plate 20 are connected into a whole;

s300), pressing the pressing head 40 against the outer walls of the input plate 10 and the output plate 20, screwing the bolt on the cross beam 41 into the screw hole, and applying a preset pretightening force;

s400), repeating the steps S200) -S300), and installing other heat exchange units until all the heat exchange units are stacked.

Preferably, when the cross section of the heat exchange device is rectangular or fan-shaped, a sealing plate 35 is arranged between adjacent buckling devices 30 for sealing.

Referring to fig. 2, the heat exchange mode is that gas introduced into the heat exchange cavity 50 from the inlet of the heat exchanger 101 is heated by the heating input plate 10, so as to achieve the purpose of heat exchange; the heated gas is output from the outlet of the heat exchanger 101. The output temperature of output plate 20 after heat exchange is reduced compared to input plate 10. If the heat exchange units are multi-layer, the gas output by the output plate 20 of the first layer is continuously heated by the heat exchange mode of the heat exchange units of the first layer until the gas is discharged from the heat exchange units of the last layer. Specifically, the previous stage heat exchange unit heats the next stage heat exchange unit in a heat radiation manner. The means of heating input plate 10 include thermal energy heating collected by a solar collection device, nuclear power emission heating, and the like.

Referring to fig. 1, the working process of the gas turbine of the present invention is: after entering the compressor 102, a working medium is compressed, then enters an inlet at one end of the heat exchanger 101, enters the combustion chamber 105 from an outlet at the other end for combustion after heat exchange and temperature rise, then enters the tesla turbine 100 to push the tesla turbine to rotate and do work, and the tesla turbine 100 drives the coaxial starting integrated generator 103 to generate electricity; the gas discharged from the tesla turbine 100 may be recycled into the heat exchanger 101 together with the gas pressurized by the compressor 102. The inlet and the outlet of the heat exchanger 101 can be respectively arranged on two end faces of the heat exchange cavity; the inlet and outlet of the heat exchanger 101 are remote from each other, such as on opposite sides, to extend the path of the working fluid.

Preferably, the tesla turbine is a tandem tesla turbine comprising at least two tesla turbine units arranged on a rotating shaft and at least two radial bearings 130; the Tesla turbine unit comprises: a rotating shaft 110, a housing 120 disposed on the rotating shaft 110, the housing 120 having a medium inlet 170 and a medium outlet 180; a plurality of turntables 191 arranged in the housing 120, the plurality of turntables 191 are fixedly connected to the rotating shaft 110, a gap is arranged between every two adjacent turntables 191 in the plurality of turntables 191, and exhaust holes 192 are uniformly distributed around the center on each turntable 191 in the plurality of turntables 191; the at least two radial bearings 130 are disposed on the rotating shaft 110; the media outlet 180 of the previous stage tesla turbine unit communicates with the media inlet 170 of the next stage tesla turbine unit.

The working principle of the tandem tesla turbine is as follows: the high velocity fluid media enters the interior of the first stage tesla turbine housing 120 through a media inlet 202 provided in the housing 120 and into the gap between adjacent discs 191. Due to the fluid boundary effect, the fluid medium drives the rotating disk 191 to rotate at high speed, thereby driving the rotating shaft 110 to rotate. The fluid medium passes through the exhaust holes 192 of each of the rotating disks 191 in turn and finally exits the housing 120 through the medium outlet 180 provided in the housing 120, passing through the conduit into the medium inlet 170 … … of the next stage tesla turbine unit until exiting from the medium outlet 180 of the last stage tesla turbine unit.

Preferably, the housings 120 of the various stages of tesla turbine units are fixed together; the media outlet 180 of the previous stage tesla turbine unit is connected by piping to the media inlet 170 of the next stage tesla turbine unit.

Preferably, a motor 103 is provided, the tandem tesla turbine and the motor 103 form a micro gas turbine, and a rotating shaft of the motor 103 is connected with the rotating shaft 110 through a coupling 140; alternatively, the rotating shaft of the motor 103 is the rotating shaft 110, that is, the rotating shaft of the motor 103 is coaxial with the rotating shaft 110 of the tandem tesla turbine.

Preferably, the motor 103 is a generator, and the rotation shaft 110 rotates to drive the rotation shaft of the motor 103 to rotate so as to realize motor power generation.

Further preferably, the motor 103 is an initiation integrated motor, and at this time, when the tandem tesla turbine is initially started, the motor 103 may be started in a start mode to rotate the rotating shaft 110 of the tandem tesla turbine, and when the rotating speed of the tesla turbine is increased to a preset rotating speed, the operating mode of the motor 103 may be switched to a power generation mode.

Preferably, the tandem tesla turbine includes a thrust bearing 150, the thrust bearing 150 is disposed in any one tesla turbine unit, the thrust bearing 150 includes a thrust disk 160 and a stator, and the thrust disk 160 is disposed on the rotating shaft 110; the thrust bearing 150 is a bearing for restricting the movement of the rotating shaft 110 in the axial direction, and the radial bearing 130 is a bearing for restricting the movement of the rotating shaft in the radial direction.

It is further preferred that the at least two radial bearings 130 and/or the thrust bearing 150 are non-contact bearings, such as air bearings, magnetic bearings, gas-magnetic hybrid bearings, etc.

Preferably, two radial bearings 130 are located at the front end of the first stage tesla turbine unit and the rear end of the last stage tesla turbine unit, respectively, and are located outside the housing 120 of the tesla turbine unit.

Preferably, the tesla turbine is a multistage tesla turbine comprising at least two tesla turbine units arranged on a rotating shaft; the Tesla turbine unit comprises: the rotating shaft 110, at least two radial bearings 130 and the housing 120 arranged on the rotating shaft 110 and the at least two radial bearings 130, wherein the housing 120 is provided with a medium inlet 170 and a medium outlet 180; a plurality of turntables 191 arranged in the housing 120, the plurality of turntables 191 are fixedly connected to the rotating shaft 110, a gap is arranged between every two adjacent turntables 191 in the plurality of turntables 191, and exhaust holes 192 are uniformly distributed around the center on each turntable 191 in the plurality of turntables 191; the at least two radial bearings 130 are disposed on the rotating shaft 110; the media outlet 180 of the previous stage tesla turbine unit communicates with the media inlet 170 of the next stage tesla turbine unit.

The working principle of the multistage tesla turbine is as follows: the high velocity fluid media enters the interior of the first stage tesla turbine housing 120 through a media inlet 202 provided in the housing 120 and into the gap between adjacent discs 191. Due to the fluid boundary effect, the fluid medium drives the rotating disk 191 to rotate at high speed, thereby driving the rotating shaft 110 to rotate. The fluid medium passes through the exhaust holes 192 of each of the rotating disks 191 in turn and finally exits the housing 120 through the medium outlet 180 provided in the housing 120, passing through the conduit into the medium inlet 170 … … of the next stage tesla turbine unit until exiting from the medium outlet 180 of the last stage tesla turbine unit.

Preferably, the media outlet 180 of the previous stage tesla turbine unit is connected to the media inlet 170 of the next stage tesla turbine unit by a pipe.

Preferably, each tesla turbine unit is provided with a motor 103, the tesla turbine unit and the motor 103 form a micro gas turbine, and a rotating shaft of the motor 103 is connected with the rotating shaft 110 through a coupling; alternatively, the rotating shaft of the motor 103 is the rotating shaft 110, that is, the rotating shaft of the motor 103 is coaxial with the rotating shaft 110 of the multistage tesla turbine.

Further preferably, the motor 103 is a start-up integrated motor, at this time, when the tesla turbine unit is initially started, the motor 103 may be started in a start mode to rotate the rotating shaft 110 of the tesla turbine unit, and when the rotating speed of the tesla turbine unit is increased to a preset rotating speed, the operating mode of the motor 103 may be switched to a power generation mode.

Preferably, each tesla turbine unit comprises a thrust bearing 150, said thrust bearing 150 comprising a thrust disc 160 and a stator, said thrust disc 160 being arranged on said rotating shaft 110; the thrust bearing 150 is a bearing for restricting the movement of the rotating shaft 110 in the axial direction, and the radial bearing 130 is a bearing for restricting the movement of the rotating shaft in the radial direction.

Preferably, two radial bearings 130 are located outside the two end turntables, respectively.

Preferably, the number of discs 191 in each stage of the tesla turbine unit may be equal or individually equal or unequal.

The utility model discloses a multistage tesla turbine accessible increases the quantity increase airflow of carousel 191, through increasing the progression increase pressure ratio.

Assuming that the gas pressure at the working medium inlet is 20 times of atmospheric pressure, and the gas pressure can be reduced by 2 times by each stage of Tesla turbine unit, the discharge pressure can be close to the atmospheric pressure by 4-5 stages of Tesla turbine units, and the pressure drop loss is very small.

For a Tesla turbine, the preferred embodiment is as follows

Preferably, the media inlet 170 of each stage of tesla turbine units is provided with a nozzle to increase the gas flow rate.

Preferably, the connection position of the rotating shaft 110 and the housing 120 is sealed, so as to prevent the working medium from leaking. The outside of serial-type tesla turbine sets up the safety cover, and the safety cover can be soaked in water tank or pond and cool down.

Preferably, the rotating shaft 110 is supported in a stator (not shown) by at least one pair of radial bearings 130.

Preferably, the turntable 191 is a circular disk.

Preferably, the air discharge holes 192 on each disk 191 are coaxially arranged.

Preferably, the rotary plate 191 is fixed to the rotary shaft 110 by a key connection or the like.

Preferably, a spacer 193 is disposed between two adjacent rotating discs 191, and the spacer 193 is used for adjusting the size of the gap between two adjacent rotating discs 191.

Preferably, the turntable 191 is made of steel or carbon fiber material or high-temperature resistant epoxy resin.

Preferably, spiral air grooves 194 are formed in two side faces of the rotary plate 191 to achieve rapid through flow of air on two sides of the rotary plate 191, so that air can be conducted, and air blockage and accumulation can be prevented.

Further preferably, the air grooves 194 may be formed by forging, rolling, etching, or stamping.

The utility model discloses a serial-type tesla turbine accessible increases the quantity increase airflow of carousel 191, through increasing the progression increase pressure ratio.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. The micro gas turbine is characterized by comprising a combustion chamber, a heat exchanger, an air compressor, a Tesla turbine and a starting integrated motor, wherein the heat exchanger is a multi-cavity heat exchange device and comprises at least two heat exchange units, each heat exchange unit comprises an input plate and an output plate, the side surfaces of the input plate and the output plate are hermetically connected through a buckling device, and a heat exchange cavity is defined by the adjacent input plates and the output plates.

2. The micro gas turbine according to claim 1, wherein fins are provided on inner walls of the input plate and the output plate in the heat exchanging chamber.

3. The micro gas turbine according to claim 2, wherein the fin is integrally formed with the input plate or the output plate; alternatively, the first and second electrodes may be,

the fins are fixed to the input plate or the output plate.

4. The micro gas turbine according to claim 2, wherein the fin is a corrugated plate or a straight plate.

5. The micro gas turbine according to claim 1, wherein the fastening means comprises a first rail, a second rail and a side wall perpendicular thereto, the first rail, the second rail and the side wall are formed in a concave shape in cross section, and the input plate and the output plate are inserted at edges thereof into a fastening groove formed between the first rail, the second rail and the side wall.

6. The micro gas turbine according to claim 1, wherein the tesla turbine is an in-line tesla turbine comprising at least two tesla turbine units disposed on a rotating shaft and at least two radial bearings;

the at least two radial bearings are arranged on the rotating shaft;

7. The micro gas turbine according to claim 6, wherein the in-line Tesla turbine comprises an electric motor having a shaft coupled to the shaft; alternatively, the first and second electrodes may be,

the rotating shaft of the motor is the rotating shaft.

8. The micro gas turbine according to claim 1, wherein the tesla turbine is a multi-stage tesla turbine comprising at least two tesla turbine units;

9. The micro gas turbine according to claim 8, wherein each tesla turbine unit comprises an electric motor having a shaft coupled to the shaft by a coupling; alternatively, the first and second electrodes may be,

the rotating shaft of the motor is the rotating shaft.