KR200494429Y1 - High rotation generator coupled with gas turbine for tank recovery vehicle - Google Patents

Abstract

A high-revving gas turbine generator for a rescue vehicle is provided. A high rotation gas turbine generator according to the present invention includes a power generation unit including a stator and a rotor, a shaft assembly coupled to the rotor to rotate the rotor, and an impeller for circulating air for cooling the power generation unit and the shaft assembly and a case surrounding the power generation unit, the shaft assembly, and the impeller, wherein the ratio of the length to the outer diameter of the rotor is 2.63 to 2.91, and the ratio of the length to the outer diameter of the stator is 1.09 to 1.21, wherein the A plurality of cooling holes are formed along the circumference of the case surrounding the impeller.

Description

HIGH ROTATION GENERATOR COUPLED WITH GAS TURBINE FOR TANK RECOVERY VEHICLE}

The present invention relates to a high rotation gas turbine generator. More particularly, it relates to a high-rotation gas turbine generator capable of simply and efficiently improving output capability.

BACKGROUND OF THE INVENTION Automobiles and electric vehicles driven by internal combustion engines require electric generators for the generation of electrical auxiliary power for operation of various electrical components and actuators of the vehicle.

The K-1 Rescue Tank, a Korean-style rescue tank, also requires an auxiliary power assembly to supply insufficient power when towing, welding, or cutting the faulty tank rearward, charging the mains battery, or activating the crew cabin heating. The driving method of the auxiliary power assembly is a gas turbine engine, and the mechanical energy of the gas turbine engine is converted into electrical energy through a generator and used as auxiliary power.

On the other hand, as the battlefield of a tank or vehicle has recently been advanced, the amount of power consumed is also increasing significantly. However, the existing auxiliary power assembly alone cannot cope with such a large-capacity power demand, and the demand for a generator capable of producing a larger-capacity power is increasing.

However, simply trying to increase the capacity of the generator increases the size of the generator, and the size and design of the other major components of the auxiliary power assembly, such as the power head, cup motor housing, turbine steering unit, voltage regulator, and gearbox, are also changed. There is a problem that must be

Accordingly, there is an urgent need for a generator with improved performance that can increase the capacity of the generator without affecting other components of the auxiliary power assembly.

Republic of Korea Patent Publication No. 10-1592502 (Notice on Feb. 11, 2016)

A technical problem to be solved through some embodiments of the present invention is to provide a high-rotation gas turbine generator with an improved capacity of the generator without affecting other components of the auxiliary power assembly.

Another technical problem to be solved through some embodiments of the present invention is to provide a high-rotation gas turbine generator capable of minimizing design changes and development costs while responding to large-capacity power demand.

Another technical problem to be solved through some embodiments of the present invention is to provide a high-rotation gas turbine generator that can replace imported goods and secure domestic manufacturing technology by commercializing generator products that have been dependent on existing imports with domestic technology.

The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

In order to solve the above technical problem, a gas turbine generator for a rescue vehicle according to embodiments of the present invention includes a power generation unit including a stator and a rotor, a shaft assembly coupled to the rotor to rotate the rotor, and the power generation and an impeller for circulating air for cooling of the part and the shaft assembly, and a case surrounding the power generation part, the shaft assembly, and the impeller, wherein the ratio of the length to the outer diameter of the rotor is 2.63 to 2.91, the The ratio of the length to the outer diameter of the stator is 1.09 to 1.21, and a plurality of cooling holes are formed along the circumference in a portion surrounding the impeller of the case.

In one embodiment, the shaft assembly includes a main shaft coupled to the rotor, and a gear shaft coupled to the main shaft, and a ratio of the length of the main shaft straight pipe portion of the main shaft to the outer diameter may be 5.99 to 6.62. have.

In one embodiment, the ratio of the outer diameter of the main shaft to the outer diameter of the gear shaft may be 0.40 to 0.44.

In one embodiment, the ratio of the width to the outer diameter of the impeller may be 0.26 to 0.28.

In one embodiment, a 100A rated current diode, and a capacitor assembly capable of accommodating four capacitors may be further included.

According to the technical configuration of the present invention described above, it is possible to improve the capacity of the generator without affecting other components of the auxiliary power assembly.

In addition, while securing a high-rotation gas turbine generator capable of responding to a large-capacity power demand, it is possible to minimize the design change and development cost required therefor.

In addition, since the generator product, which was dependent on existing imports, is commercialized with domestic technology, it has the effect of replacing imported products and securing domestic manufacturing technology.

1 is a view showing the overall configuration and specifications of the existing imported generator.
2 is a configuration diagram for explaining the main configuration of a high-rotation gas turbine generator according to the present invention.
3 is a view for showing the improved configuration of the stator and the rotor and the design dimensions thereof according to the present invention.
4 is a view for showing the configuration and design dimensions of the improved shaft assembly according to the present invention.
5 is a view for showing the configuration and design dimensions of the improved impeller according to the present invention.
6 is a view showing the configuration of an improved case in which cooling holes are formed around the impeller according to the present invention.
7 is a flowchart illustrating a design method of a high-rotation gas turbine generator according to the present invention.
8 is a view for further explaining the location and surrounding main components in the auxiliary power assembly of the high-rotation gas turbine generator according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the technical idea of the present invention is not limited to the following embodiments, but may be implemented in various different forms, and only the following embodiments complete the technical idea of the present invention, and in the technical field to which the present invention belongs It is provided to fully inform those of ordinary skill in the scope of the present invention, and the technical spirit of the present invention is only defined by the scope of the claims.

In adding reference numerals to the components of each drawing, it should be noted that the same components are given the same reference numerals as much as possible even though they are indicated on different drawings. In addition, in describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

Unless otherwise defined, all terms (including technical and scientific terms) used herein may be used with the meaning commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, terms defined in a commonly used dictionary are not to be interpreted ideally or excessively unless clearly defined in particular. The terminology used herein is for the purpose of describing the embodiments and is not intended to limit the present invention. As used herein, the singular also includes the plural unless specifically stated otherwise in the phrase.

In addition, in describing the components of the present invention, terms such as first, second, A, B, (a), (b) may be used. These terms are only for distinguishing the components from other components, and the essence, order, or order of the components are not limited by the terms. When a component is described as being “connected”, “coupled” or “connected” to another component, the component may be directly connected or connected to the other component, but another component is between each component. It should be understood that elements may be “connected,” “coupled,” or “connected.”

Hereinafter, some embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention relates to a generator of an auxiliary power assembly attached to a K-1 rescue vehicle, and the main components of the existing auxiliary power assembly, for example, a combustion chamber assembly, a turbine assembly, a gear box, a cup motor, a starter motor, and a turbine control unit A generator performance improvement plan that can improve the output capability of the overall auxiliary power assembly by about 20% or more by partially designing only the elements that do not affect the main components in the configuration of the generator without changing the voltage regulator, etc. We would like to propose a high-rotation gas turbine generator according to the

A generator is a device that is connected to an engine (eg, a gas turbine) through a shaft and converts mechanical energy transmitted through the shaft into electrical energy. The generator converts the kinetic energy of the conductor into electrical energy by the electromagnetic induction principle by forming a magnetic field therein and moving the conductor in the formed magnetic field.

A generator generally includes a stator, a rotor, an exciter, and a cooling device as main components.

Among them, the stator consists of an armature core, an armature winding surrounding it, and a stator frame.

The rotor consists of a pole core, a field winding, and a rotor yoke and a shaft.

An exciter is a device that supplies DC power so that a magnetic field can be formed in the coil of the rotor.

The cooling device is a device that circulates and cools the air inside the generator using outside air so that the temperature inside the generator does not rise too high.

As an existing discussion for improving the generator output (or capacity), two methods have been discussed: a method of increasing the diameters of the stator and the rotor, and a method of lengthening the axial length of the stator and the rotor.

Based on this, the following formula is derived by estimating the formula for calculating the expected capacity of the generator.

P = K * D ² * L * N [KVA, KW]

Here, K is the output coefficient of the generator, D is the rotor outer diameter or stator inner diameter, L is the length of the rotor iron core, N is the rated speed of the generator.

Based on the above calculation formula, in order to increase the generator capacity (or output), i) increase the rated rotation speed (N) of the generator, ii) increase the rotor outer diameter (D), iii) the rotor The length (L) of the iron core should be increased, or iv) the output coefficient (K) should be increased.

First, i) the rated rotation speed of the generator depends on the rotation speed of the engine (eg, gas turbine engine) connected to the generator, so it is not suitable as an independent performance improvement method.

Also, ii) increasing the rotor diameter inevitably increases the overall size and outer case diameter of the generator, so that other components around it, e.g., combustion chamber assembly, turbine assembly, gearbox, cup motor, starter motor, Since the shape and position of the turbine control unit, voltage regulator, etc. are inevitably changed, the design of the surrounding components must be changed, thereby increasing the overall development cost.

Therefore, in the present invention, iii) a design method to increase the length (L) of the rotor core and iv) a design method to increase the output coefficient, to improve the capacity of the high-rotation gas turbine generator.

According to the present invention, since it is not necessary to change the shape and position of other components around the generator, it is possible to achieve the original purpose of increasing the generator capacity while minimizing the overall design change factor and development cost.

Hereinafter, specific configurations and related embodiments of the present invention will be described with reference to the drawings.

1 is a view showing the overall configuration and specifications of the existing imported generator.

The existing generator 10 has a power generation capacity of 10kW, a starting voltage of 24V DC, a power generation voltage of 28V DC, and overvoltage conditions DC 32V or higher, and a rated rotational speed (RPM, Revolution Per Minute) is 12000 revolutions/minute.

In the present invention, without affecting the overall size and other specifications of the generator 10, it is proposed to significantly improve the power generation capacity compared to the existing one.

2 is a configuration diagram for explaining the main configuration of a high-rotation gas turbine generator according to the present invention. 2, the generator 100 according to the present invention includes a power generation unit 110, a shaft assembly 120, Shaft Assembly, an impeller 130, Impeller, a case 140, Outer Case), a diode 150, and a condenser assembly 160 (Condenser Assembly).

The power generation unit 110 is a component that produces electric energy by electromagnetic induction by rotating a rotor wound around a magnetic field in which a magnetic field is formed.

The shaft assembly 120 is a component that is coupled to the rotor of the power generation unit 110 and rotates the rotor using the rotational force of an engine (eg, a gas turbine engine).

The impeller 130 is a component that circulates the air inside the generator 100 so that the power generation unit 110 and the shaft assembly 120 are not overheated.

The case 140 is a case forming the external structure of the generator 100 . Among them, part A is a part surrounding the impeller 130 , and the specific configuration of part A will be described later with reference to FIG. 6 .

The diode 150 is a component for rectifying the AC electricity generated by the power generation unit 110 into DC electricity.

The condenser assembly 160 is a component composed of a condenser required for the generator 100 and a condenser case for accommodating the condenser.

As previously reviewed, to increase the power generation capacity of the generator 100, to minimize the design change and not to affect the surrounding components, a design method to increase the length (L) of the rotor core or increase the output coefficient It is appropriate to devise a design plan that allows

Accordingly, in the present invention, in order to increase the length (L) of the rotor core, while increasing the length of the rotor and the stator of the power generation unit 110, the shaft to support the increased length of the rotor and the stator Increase the length of assembly 120 . At the same time, structural design changes are made to the shaft assembly 120 so that the shaft assembly 120 can withstand the mechanical pressure and torsion according to the increased length.

However, through a number of experiments and empirical verification performed while carrying out the present invention, the proper maximum power generation capacity that can be obtained by increasing the length of the rotor and stator of the power generation unit 110 is about 20% based on the initial generation capacity of 10 kw was derived to be about 12kw increased (there may be a deviation of ±5% depending on the specifications of the product on which the generator is mounted).

Theoretically, the power generation capacity should increase linearly as the length of the rotor core increases, but in practice, the generation capacity increases linearly according to various resistance and loss factors as the length of the rotor core increases. According to the present invention, it is necessary to increase the length of the shaft assembly 120 as the rotor core is increased, and accordingly, the pressure and torsion applied to the shaft assembly 120 increase and eventually exceed a certain point. As the length of the rotor core increases, the efficiency of increasing the power generation capacity is greatly reduced.

In the present invention, through a number of experiments and trial and error, it was derived that the optimal power generation capacity increase that can be obtained by increasing the length of the rotor core is about 12 kw, which is an increase of about 20% based on the initial power generation capacity of 10 kw, and in the following Based on this, the related explanation will be continued.

In addition, in the present invention, in order to increase the output coefficient of the generator 100, a method of improving the performance of the impeller 130 to increase the cooling efficiency of the overall generator was applied. The output coefficient of the generator 100 is not determined by any one element and the overall system of the generator is harmonized to determine the output coefficient, but in the present invention, the cooling performance of the generator 100 is constant through several repeated experiments and demonstrations. It was verified that the output coefficient also increased when the level was improved.

The increase in the output coefficient through the improvement of the performance of the impeller 130 is different for each generator system, so that the increase cannot be determined as a predetermined value. However, it has been confirmed through a number of experiments that when the optimal design change is applied to the impeller 130 according to the present invention, it is possible to increase the output coefficient by approximately 3% at most.

In the present invention, by overlapping the method of increasing the length of the rotor and the stator of the power generation unit 110 and the method of improving the impeller 130 performance, the overall power generation capacity increases between about 18% and 28% (first generation of power generation) capacity of 10 kW) could be achieved.

Hereinafter, a detailed design method for each component of the generator 100 will be described in more detail with reference to the detailed drawings.

3 is a view for showing the improved configuration of the stator and the rotor and the design dimensions thereof according to the present invention. Referring to FIG. 3 , the power generation unit 110 (see FIG. 2 ) includes a stator 111 and a rotor 112 .

In the present invention, in order to achieve a power generation capacity improvement of about 20%, the length L1 of the stator 111 and the length L2 of the rotor 112 are each increased by 20% (±5% according to design specifications) may have deviations).

At this time, as the lengths (L1, L2) of the stator 111 and the rotor 112 increase, the lengths of the iron core (Armature core) of the stator 111 and the iron core (Pole core) of the rotor are increased by 20%, respectively, The number of windings wound around each iron core (armature core, pole core) is also increased by 20%.

On the other hand, in order not to affect the overall size and peripheral components of the generator 100, the inner diameter (D1) of the stator 111 and the outer diameter (D2) of the rotor maintain the previous size without design changes, and thus, the overall stator (111) and the diameter-to-length ratio (L1/D1, or L2/D2) of the rotor 112 are also increased by 20%.

Comparing this with the design specifications of the existing generator, it is compared as shown in Table 1 and Table 2 below.

Stator Design Specifications conventional generator Generator according to the present invention Length (L1) Inner diameter (D1) Ratio (L1/D1) Length (L1) Inner diameter (D1) Ratio (L1/D1) size 85.0mm 88.5mm 0.96 102mm 88.5mm 1.15 rate of change - - - +20% - +20%

However, there may be a deviation of ±5% in the dimensions and increase/decrease rate increased according to the design specifications.

Rotor design specification conventional generator Generator according to the present invention Length (L2) Outer diameter (D2) Ratio (L2/D2) Length (L2) Outer diameter (D2) Ratio (L2/D2) size 97mm 42mm 2.31 116.4mm 42mm 2.77 rate of change - - - +20% - +20%

However, there may be a deviation of ±5% in dimensions and increase/decrease rate according to design specifications. As an embodiment, the stator frame coupled to the stator also has a length of about 20% to match the increased iron core length and number of windings. can be increased.

As an embodiment, the length of the rotor Yoke coupled to the rotor may also be increased by about 20% to match the increased iron core length and the number of windings.

4 is a view for showing the configuration and design dimensions of the improved shaft assembly according to the present invention. Referring to FIG. 4 , the shaft assembly 120 (refer to FIG. 2 ) includes a main shaft 121 and a gear shaft 122 . Since the basic functions and definitions of the main shaft 121 and the gear shaft 122 are well known in the art, a detailed description thereof will be omitted here.

4 (a) is a view showing the external shape of the shaft assembly (120), FIG. 4 (b) is a view showing a longitudinal section of the shaft assembly (120). As shown in (a) and (b) of Figure 4, by assembling the gear shaft 122 inside the main shaft 121, the entire shaft assembly 120 is configured.

Previously, as the length L2 of the rotor 112 is increased in FIG. 3 , the length of the shaft assembly 120 coupled to the rotor 112 must also be increased by that much.

Specifically, in the present invention, the main shaft straight pipe part (L3) and the gear shaft straight bar part (L4) of the main shaft 121 that are directly coupled to the rotor 112 are changed to an increased length by the increased length of the rotor, respectively. do. On the other hand, since a separate change is not applied to the diameter (outer diameter or inner diameter) of the rotor 112 , a separate change is not applied to the central outer diameter D3 of the main shaft 121 accordingly.

Comparing this with the design specifications of the existing generator, it is compared as shown in Table 3 below.

main shaft
design specification conventional generator Generator according to the present invention Main shaft straight pipe
(L3) Gear shaft straight part
(L4) outside diameter
(D3) ratio
(L3/D3) Main shaft straight pipe
(L3) Gear shaft straight part
(L4) outside diameter
(D3) ratio
(L3/D3) size 130.5mm 97.2mm 23.8mm 5.48 150.5mm 117.2mm 23.8mm 6.3 rate of change - - - - +15.3% +20% - +15%

However, there may be a deviation of ±5% in the dimensions and increase/decrease rate increased according to the design specifications. Although indicated, it is obvious that the ratio of the gear shaft straight bar portion (L4) and the outer diameter (D3) is also changed correspondingly.

As an embodiment, as the axial lengths L3 and L4 of the main shaft 112 increase, the length of the gear shaft 122 assembled to the main shaft 112 may also be increased to a corresponding length.

On the other hand, when the length L2 of the rotor 112 increases, the weight of the rotor 112 also increases to the same length accordingly. For example, when the length L2 of the rotor 112 is increased by 20% as in the example of FIG. 3 , the overall weight of the rotor 112 also increases by 20%, and the The rotor load (ie the load applied by the rotor) will also increase by 20%.

Therefore, in order for the shaft assembly 120 to withstand the increased rotor load, a design change must also be made for the gear shaft 122 .

Specifically, in the present invention, the outer diameter D4 of the center of the gear shaft 122 is increased by about 20% to withstand a greater load. Since the gear shaft 122 is a solid structure with a full interior, if the outer diameter D4 of the gear shaft 122 is increased, it can withstand a larger load without being deformed.

Comparing this with the design specifications of the existing generator, it is compared as shown in Table 4 below.

shaft
assembly
design specification conventional generator Generator according to the present invention Main shaft outer diameter (D3) Gear shaft outer diameter (D4) ratio
(D4/D3) Main shaft outer diameter (D3) Gear shaft outer diameter (D4) ratio
(D4/D3) size 23.8mm 8.4mm 0.35 23.8mm 10.0mm 0.42 rate of change - - - - +20% +20%

However, the dimensions and the increase/decrease rate increased according to the design specifications may have a deviation of ±5% As an embodiment, as an additional supplement for the shaft assembly 120 to withstand a larger load, the main shaft 121 And the material of the gear shaft 122 may be changed to high-hardness alloy steel. The conventional shaft assembly 120 uses chromium molybdenum steel of SCM415, but by changing it to a higher hardness SCM420 material, durability against load (tensile strength, toughness, etc.) can be increased.

5 is a view for showing the configuration and design dimensions of the improved impeller according to the present invention. As mentioned above, in order to increase the output coefficient of the generator 100, it is possible to improve the performance of the impeller 130 to increase the cooling efficiency of the overall generator.

To this end, in the present invention, the impeller 130 width (W) is increased to increase the air circulation capacity and cooling capacity of the impeller 130 . When the width W of the impeller 130 is increased, the area of the fan FAN 131 increases by that much, so that the air circulation capacity and cooling capacity of the impeller 130 are increased. On the other hand, at this time, if the outer diameter (D5) of the impeller 130 is increased, the overall size of the generator 100 is increased and the surrounding components are affected, so the outer diameter (D5) of the impeller 130 is maintained in the existing design. .

Comparing this with the design specifications of the existing generator, it is compared as shown in Table 5 below.

impeller
design specification conventional generator Generator according to the present invention Impeller Width (W) Impeller Outer Diameter (D5) ratio
(W/D5) Impeller Width (W) Impeller Outer Diameter (D5) ratio
(W/D5) size 12.8mm 124mm 0.1 34.0mm 124mm 0.27 rate of change - - - +166% - +170%

However, the dimensions and the increase/decrease rate increased according to the design specifications may have a deviation of ±5% FIG. 6 is a view showing the configuration of an improved case in which cooling holes are formed around the impeller according to the present invention.

In the embodiment of FIG. 6 , in order to maximize the effect of improving the cooling efficiency of the impeller 130 , a case 140 in which a cooling hole H is formed around the impeller 130 is proposed. When the cooling hole H is formed around the impeller 130 , the air around the impeller 130 is better discharged to the outside, so that ventilation and air circulation inside and outside the generator 100 become more active. At this time, the cooling hole (H) is formed along the circumference of the portion (A, see FIGS. 2 and 6 together) surrounding the impeller 130 of the case 140.

As an embodiment, at this time, six cooling holes H may be formed at equal intervals along a circumference in a portion surrounding the impeller 130 .

On the other hand, in addition to the above components, the present invention also proposes various ancillary improvements for other components. Hereinafter, improvements of the diode 150 (see FIG. 2 ) and the capacitor assembly 160 (see FIG. 2 ) of the generator 100 (see FIG. 2 ) are described as examples of such ancillary improvements.

The generator 100 essentially includes a diode 150 . Here, the diode is an electronic device through which a current flows only when a voltage is applied in a certain direction, and is a two-terminal semiconductor device used to rectify an alternating current into a direct current or rectify a waveform of the alternating current into a specific shape. In the generator 100, the diode 150 is mainly used for the purpose of rectifying the AC current generated by the power generation unit 110 into a DC current.

In the method described above, when the present invention is applied to the power generation unit 110 , the shaft assembly 120 , and the impeller 130 , the amount of generated current increases accordingly. Accordingly, since the conventional 80A diode cannot handle the increased amount of current, in the present invention, the diode 150 specification is changed from 80A to 100A diode to match the increased amount of current, and the processing capacity of the diode 150 is increased. make it

Additionally, it is also necessary to improve the configuration of the capacitor assembly 160 to cover the increased amount of power generation (the amount of current generated by the generator). However, since the capacity increase of the capacitor is possible by increasing the number of capacitors even without changing the type of capacitor, the number of capacitors entering the capacitor assembly 160 is increased by about 20% by adding one from three to four. to be able to cover At this time, the size of the condenser assembly 160 for accommodating the condenser is also increased by about 34% to accommodate the four condensers.

According to the improved gas turbine generator described above, it is possible to significantly improve the capacity of the generator without affecting other components of the auxiliary power assembly. In addition, while securing a high-rotation gas turbine generator capable of responding to a large-capacity power demand, there is an advantage in that the required design change and development cost can be minimized. In addition, since the electric generator product for tanks, which had been dependent on existing imports, can be commercialized with the domestic technology according to the present invention, it is possible to expect an industrial effect that can replace imported goods and secure domestic manufacturing technology.

7 is a flowchart illustrating a design method of a high-rotation gas turbine generator according to the present invention. The design method of FIG. 7 may be performed using software driven by a computer device such as a generator design tool, but is not limited thereto. However, in this embodiment, for convenience of description, it is assumed that each step is performed by a computing device having software. The computing device at this time is a personal computer (PC), a workstation, a server (Server), a cloud server (Cloud Server), a smartphone (Smart Phone), a tablet (Tablet), a laptop (Laptop) or a notebook ( Notebook), but is not limited thereto.

In the embodiment of FIG. 7 , it is assumed that the computing device can perform the design method according to the present embodiment with reference to the reference table in which the dimensions of the existing generator described in Tables 1 to 5 are written.

In step S100 , the computing device determines the design stator length with a dimension increased by a predetermined ratio from the reference stator length described in the reference table with reference to the reference table. In addition, the computing device determines the design rotor length with a dimension increased by a predetermined ratio over the reference rotor length described in the reference table.

In this case, the reference stator length and the reference rotor length mean the stator length and rotor length of the existing generator described in the reference table, and the design stator length and the design rotor length are the stator length and rotor length designed according to the present invention. it means.

On the other hand, as shown in Tables 1 to 5 above, since the inner diameter of the stator and the outer diameter of the rotor are not changed in the present invention, the design derived by the present invention compared to the ratio of the length to the outer diameter of the existing stator described in the reference table The length to outer diameter ratio of the stator becomes larger.

In step S200, the computing device determines the design main shaft straight pipe length of the main shaft with a dimension increased by a predetermined length from the reference main shaft straight pipe length of the main shaft described in the reference table with reference to the reference table. Further, the computing device determines the design gearshaft straight rod length of the main shaft by a dimension increased by a predetermined length from the reference gearshaft straight rod length of the main shaft described in the reference table.

In this case, the standard main shaft straight pipe length and the reference gear shaft straight bar length mean the main shaft straight pipe part length and the gear shaft straight bar part length of the main shaft of the existing generator described in the reference table, and the design main shaft straight pipe part length and the design gear The length of the shaft straight part means the length of the main shaft straight pipe part and the gear shaft straight part length of the main shaft designed according to the present invention.

In addition, in order to withstand the increasing load of the rotor, the computing device determines the design outer diameter of the gear shaft with a dimension increased by a predetermined ratio from the reference outer diameter of the gear shaft described in the reference table with reference to the reference table.

In this case, the reference outer diameter of the gear shaft means the outer diameter of the center of the gear shaft of the existing generator described in the reference table, the design outer diameter of the gear shaft means the outer diameter of the center of the gear shaft designed according to the present invention.

On the other hand, as shown in Tables 1 to 5 above, since the outer diameter of the main shaft is not changed in the present invention, the design main shaft derived by the present invention compared to the existing main shaft straight pipe length to outer diameter ratio described in the reference table The straight pipe length to outer diameter ratio becomes larger. In addition, compared to the ratio of the outer diameter of the main shaft to the outer diameter of the gear shaft described in the reference table, the ratio of the outer diameter of the main shaft to the outer diameter of the gear shaft derived by the present invention becomes larger.

Also, as an embodiment, the computing device may change the material of the gear shaft to a high-hardness material having increased tensile strength and toughness compared to the materials described in the reference table.

In step S300 , the computing device determines the design impeller width with a dimension increased by a predetermined ratio from the reference impeller width described in the reference table with reference to the reference table.

In this case, the reference impeller width means the width of the impeller of the existing generator described in the reference table, and the design impeller width means the width of the impeller designed according to the present invention.

On the other hand, as seen in Tables 1 to 5 above, since the outer diameter of the impeller in the present invention is not changed, the design impeller width to outer diameter ratio derived by the present invention compared to the existing impeller width to outer diameter ratio described in the reference table is become bigger

In step S400, the computing device designs the case so that a cooling hole is formed in a portion surrounding the impeller of the case. In this case, the computing device may form a plurality of cooling holes along the circumference of a portion surrounding the impeller of the case, and more specifically, may form six cooling holes at equal intervals along the circumference.

In one embodiment, the computing device may additionally change the diode specifications of the generator to be higher than the specifications listed in the reference table.

In one embodiment, the computing device may additionally change the size of the capacitor assembly to be larger than the size described in the reference table, such that the capacitor assembly accommodates a larger number of capacitors.

8 is a view for further explaining the location and surrounding main components in the auxiliary power assembly of the high-rotation gas turbine generator according to the present invention.

Referring to FIG. 8 , it is shown that the improved gas turbine generator according to the present invention is assembled to the auxiliary power assembly 1000 . In the auxiliary power assembly 1000 , a gear box, a combustion chamber assembly, a turbine assembly, a cup motor, a starter motor, a voltage regulator, and a turbine control unit are located around the generator.

The use of other commonly known methods to increase the generating capacity of a generator greatly increases the volume of the generator and, accordingly, the surrounding components of the generator (eg, gearbox, combustion chamber assembly, turbine assembly, cup motor, starter). In order to adapt the size and location of the motor, voltage regulator and turbine control unit) to the larger generator volume, additional design changes must be made to the surrounding components as well. However, it is not preferable because it causes a very large design difficulty and an increase in cost.

On the other hand, according to the present invention, it is possible to increase the capacity of the generator by about 20% (15% to 25% if the error is taken into account), while maintaining the size of the generator without changing the design of the surrounding components. Accordingly, it is easy to design for a remarkably increase in the capacity of the generator compared to the prior art, and it is possible to significantly reduce the design cost and the manufacturing cost required therefor.

Although embodiments of the present invention have been described with reference to the accompanying drawings, those of ordinary skill in the art to which the present invention pertains can implement the present invention in other specific forms without changing the technical spirit or essential features. can understand that there is Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.

The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent range should be interpreted as being included in the scope of the technical ideas defined by the present invention.

100: gas turbine generator
110: power generation unit
111: stator 112: rotor
120: shaft
121: main shaft 122: gear shaft
130: impeller
140: generator case
150: diode
160: condenser assembly

Claims (5)

A gas turbine generator for a rescue vehicle having an increased capacity, comprising:
a power generation unit including a stator and a rotor;
an iron core of the rotor;
a shaft assembly coupled to the rotor to rotate the rotor;
an impeller for circulating air to cool the power generation unit and the shaft assembly; and
Including a case surrounding the power generation unit, the shaft assembly and the impeller,
The length of the rotor is increased to increase the length of the iron core,
The length of the stator is increased to increase the length of the iron core,
The shaft assembly includes a main shaft coupled to the rotor and a gear shaft coupled to the main shaft,
The straight pipe part of the main shaft and the straight bar part of the gear shaft are increased in length to correspond to the increase in the length of the rotor,
The central portion of the gear shaft has an increased outer diameter to withstand the increase in the rotor load as the length of the rotor increases,
A plurality of cooling holes are formed along the circumference on the circumferential surface of the portion surrounding the impeller of the case,
Gas Turbine Generator for Rescue Tanks. According to claim 1,
The ratio of the length of the main shaft straight pipe portion of the main shaft to the outer diameter is 5.99 to 6.62,
Gas Turbine Generator for Rescue Tanks. delete According to claim 1,
The ratio of the width to the outer diameter of the impeller is 0.26 to 0.28,
Gas Turbine Generator for Rescue Tanks. According to claim 1,
Diodes with a rated current of 100A; and
Further comprising a condenser assembly capable of accommodating four condensers,
Gas Turbine Generator for Rescue Tanks.

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