High and low voltage dual-output generator for high-altitude environments

Abstract

This utility model discloses a high- and low-voltage dual-output generator for high-altitude environments, comprising a high-voltage generator and a low-voltage generator. The high-voltage generator has a built-in high-voltage stator and a high-voltage rotor, and its outer casing is mounted via a high-voltage front end cover and a high-voltage rear end cover. A high-voltage junction box is located outside the outer casing. The low-voltage generator has a built-in low-voltage fan, a low-voltage rotor, and a low-voltage stator, and its rear end cover is located at the rear. A low-voltage junction box is located externally. The key feature is that a coupling is installed at the rear end of the high-voltage rotor, and the low-voltage rotor is mounted to the coupling via coupling plates, thus connecting the shaft systems of the high-voltage and low-voltage generators. The low-voltage stator is fixedly connected to the high-voltage rear end cover. The beneficial effects of this utility model are: when applied in high-altitude areas with insufficient power grid coverage, the generator only needs to be combined with a diesel engine to form a unit, which can simultaneously meet the mixed power needs of industrial high-voltage 10kV and civilian low-voltage 400V, reducing space occupation.

Description

Technical Field

[0001] This utility model relates to the field of power generation equipment technology, and in particular to a high- and low-voltage dual-output generator for use in high-altitude environments. Background Technology

[0002] Areas above 2500 meters in altitude account for 26% of my country's land area, where conventional power grid coverage is insufficient, necessitating the use of diesel generator sets for power supply. Existing diesel generator sets are generally single-voltage models. Dual-output models can simultaneously meet the power needs of industrial high-voltage 10.5kV and residential low-voltage 400V, filling the power gap in medium-sized communities / mining areas. A single unit replaces the traditional "high-voltage generator + step-down transformer" combination. This centralized, high-power solution can reduce operation and maintenance costs by over 45%. The dual-output design reduces transformer layers, decreasing equipment investment by 20%-30%, and shrinking the footprint by 40%-50%, while improving overall energy efficiency by 12%-15%.

[0003] With the continued deepening of China's Western Development Strategy, major projects such as railways and ultra-high-voltage power grids in high-altitude areas have significantly increased their demand for stable power supply, and the annual growth rate of related equipment procurement is expected to reach more than 15%. Integrated wind, solar and energy storage projects require flexible peak-shaving power sources. Traditional diesel generator sets are gradually being phased out due to environmental restrictions. Dual-output generators can be compatible with high and low voltage grid-connected and off-grid modes, filling the gap in the volatility of new energy sources. High-altitude mining areas, border base stations and other scenarios have a high dependence on emergency power. This utility model can cover medium-sized operating areas, and its market demand accounts for more than 30%.

[0004] Existing high-altitude generators have the following drawbacks: 1. Single-voltage output is insufficient to meet the diverse voltage levels required in high-altitude areas; 2. The traditional combination of a high-voltage generator and a step-down transformer involves multiple transformer stages, high equipment investment, high maintenance costs, and significant energy loss; 3. The rigid coupling connection results in poor shaft reliability and vibration transmission problems. This invention consists of a 10.5kV high-voltage generator and a 400V low-voltage generator, connected by a coupling. Applied to high-altitude areas with insufficient power grid coverage, the generator only needs to be combined with a diesel engine to form a unit that can simultaneously meet the mixed power demands of industrial 10.5kV high voltage and residential 400V low voltage. This reduces space requirements and solves the technical problems of single voltage, poor shaft reliability, and significant vibration associated with traditional generators in high-altitude environments. It also reduces energy loss caused by multiple transformer stages, improving overall efficiency by over 12%. Summary of the Invention

[0005] The purpose of this invention is to provide a dual-voltage generator for high-altitude environments, suitable for altitudes above 3000 meters, capable of simultaneously outputting 10.5kV high voltage and 400V low voltage. It directly provides both high and low voltages for different applications, eliminating the need for step-up and step-down transformers, reducing intermediate steps, lowering investment, and improving efficiency. This invention employs a coupling with coupling plates for a rigid-flexible connection, effectively reducing vibration during operation.

[0006] The technical solution adopted in this utility model is as follows: a high-voltage and low-voltage dual-output generator for high-altitude environments, comprising a high-voltage generator and a low-voltage generator; the high-voltage generator includes: a high-voltage front end cover, a high-voltage stator, a high-voltage rotor, a high-voltage junction box, a high-voltage rear end cover, and a coupling; the low-voltage generator includes: a low-voltage fan, a low-voltage rotor, a low-voltage stator, a low-voltage junction box, and a low-voltage rear end cover; the high-voltage generator has a built-in high-voltage stator and a high-voltage rotor, and its outer casing is installed through the high-voltage front end cover and the high-voltage rear end cover, with a high-voltage junction box installed outside the outer casing; the low-voltage generator has a built-in low-voltage fan, a low-voltage rotor, and a low-voltage stator, with a low-voltage rear end cover at the rear of the low-voltage generator, and a low-voltage junction box externally, characterized in that: the coupling is installed at the rear end of the high-voltage rotor, and the low-voltage rotor is installed with the coupling through coupling plates, realizing the connection between the shaft systems of the high-voltage generator and the low-voltage generator, while the low-voltage fan is also installed and fixed on the coupling, and the low-voltage stator is installed and fixedly connected to the high-voltage rear end cover.

[0007] Furthermore, the high- and low-voltage dual-output generator also includes a mounting bracket, which is located at the lower end of the high-voltage generator and the low-voltage generator, and the connection and fixation are strengthened by adding the mounting bracket.

[0008] Furthermore, the high-voltage generator outputs 10kV voltage and adopts a double-bearing structure, while the low-voltage generator outputs 400V voltage and adopts a single-bearing structure.

[0009] Furthermore, the high-voltage stator mainly consists of a high-voltage frame, a high-voltage stator core, and high-voltage coils; the high-voltage rotor consists of a high-voltage shaft, a high-voltage front bearing, a high-voltage fan, a high-voltage rotor core, high-voltage rotor coils, a high-voltage exciter rotor, and a high-voltage rear bearing; the high-voltage frame contains the high-voltage stator core and high-voltage coils.

[0010] Furthermore, the low-voltage stator mainly consists of a low-voltage frame, a low-voltage stator core, and low-voltage coils, while the low-voltage rotor consists of a coupling plate, a bushing, a low-voltage shaft, a low-voltage rotor core, low-voltage rotor coils, a low-voltage exciter rotor, and low-voltage bearings; the low-voltage frame contains the low-voltage stator core and low-voltage coils.

[0011] Furthermore, the high-voltage generator shaft is connected to the diesel engine. During operation, the diesel engine is connected to the high-voltage generator shaft to drive the high-voltage generator to generate electricity. At the same time, the coupling at the rear end of the high-voltage generator is connected to the coupling plate of the low-voltage generator, driving the low-voltage generator at the rear end to rotate and generate electricity.

[0012] The beneficial effects of this utility model are: when applied in high-altitude areas with insufficient power grid coverage, the generator only needs to be combined with a diesel engine to form a unit, which can simultaneously meet the mixed power demand of industrial high voltage 10kV and civil low voltage 400V, reducing space occupation, solving the technical problems of traditional generators with single voltage and poor shaft system reliability in high-altitude environments, reducing the power loss caused by multi-stage transformers, and improving the overall efficiency by more than 12%. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the high-voltage stator of this utility model; Figure 3 This is a schematic diagram of the high-pressure rotor of this utility model; Figure 4 This is a schematic diagram of the low-pressure rotor of this utility model; Figure 5 This is a schematic diagram of the low-voltage stator of this utility model; In the diagram: 1 High-voltage front cover, 2 High-voltage stator, 3 High-voltage rotor, 4 High-voltage junction box, 5 High-voltage rear end cover, 6 Coupling, 7 Low-voltage fan, 8 Low-voltage rotor, 9 Low-voltage stator, 10 Low-voltage junction box, 11 Low-voltage rear end cover, 12 Mounting bracket, 21 High-voltage frame, 22 High-voltage stator core, 23 High-voltage coil, 31 High-voltage shaft, 32 High-voltage front bearing, 33 High-voltage fan, 34 High-voltage rotor core, 35 High-voltage rotor winding, 36 High-voltage exciter rotor, 37 High-voltage rear bearing, 81 Coupling plate, 82 Shaft sleeve, 83 Low-voltage shaft, 84 Low-voltage rotor core, 85 Low-voltage rotor coil, 86 Low-voltage exciter rotor, 87 Low-voltage bearing, 91 Low-voltage frame, 92 Low-voltage stator core, 93 Low-voltage stator coil. Detailed Implementation

[0014] A dual-voltage output generator for high-altitude environments comprises a high-voltage generator and a low-voltage generator. The high-voltage generator includes a high-voltage front cover, a high-voltage stator, a high-voltage rotor, a high-voltage junction box, a high-voltage rear cover, and a coupling. The low-voltage generator includes a low-voltage fan, a low-voltage rotor, a low-voltage stator, a low-voltage junction box, and a low-voltage rear cover. The high-voltage generator houses the high-voltage stator and high-voltage rotor, with the outer casing mounted via the high-voltage front and rear covers. A high-voltage junction box is located outside the outer casing. The low-voltage generator houses the low-voltage fan, low-voltage rotor, and low-voltage stator, with a low-voltage rear cover at the rear and a low-voltage junction box externally. The key feature is that the coupling is installed at the rear end of the high-voltage rotor, and the low-voltage rotor is mounted to the coupling via coupling plates, connecting the shaft systems of the high-voltage and low-voltage generators. Simultaneously, the low-voltage fan is also mounted and fixed on the coupling, and the low-voltage stator is installed and fixedly connected to the high-voltage rear cover.

[0015] Furthermore, the high- and low-voltage dual-output generator also includes a mounting bracket, which is located at the lower end of the high-voltage generator and the low-voltage generator, and the connection and fixation are strengthened by adding the mounting bracket.

[0016] Furthermore, the high-voltage generator outputs 10kV voltage and adopts a double-bearing structure, while the low-voltage generator outputs 400V voltage and adopts a single-bearing structure.

[0017] Furthermore, the high-voltage stator mainly consists of a high-voltage frame, a high-voltage stator core, and high-voltage coils; the high-voltage rotor consists of a high-voltage shaft, a high-voltage front bearing, a high-voltage fan, a high-voltage rotor core, high-voltage rotor coils, a high-voltage exciter rotor, and a high-voltage rear bearing; the high-voltage frame contains the high-voltage stator core and high-voltage coils.

[0018] Furthermore, the low-voltage stator mainly consists of a low-voltage frame, a low-voltage stator core, and low-voltage coils, while the low-voltage rotor consists of a coupling plate, a bushing, a low-voltage shaft, a low-voltage rotor core, low-voltage rotor coils, a low-voltage exciter rotor, and low-voltage bearings; the low-voltage frame contains the low-voltage stator core and low-voltage coils.

[0019] Furthermore, the high-voltage generator shaft is connected to the diesel engine. During operation, the diesel engine is connected to the high-voltage generator shaft to drive the high-voltage generator to generate electricity. At the same time, the coupling at the rear end of the high-voltage generator is connected to the coupling plate of the low-voltage generator, driving the low-voltage generator at the rear end to rotate and generate electricity.

[0020] The advantages of this utility model are: multi-scenario compatibility: synchronously outputting power at different voltage levels to meet the mixed power supply needs of industrial high-voltage equipment (such as mining machinery and large motors) and civil low-voltage facilities (lighting and communication base stations); Comprehensive energy efficiency optimization: It integrates high and low voltage dual-circuit output. The high voltage side 10.5kV is used for long-distance power transmission and directly supplies power to 10.5kV mining equipment. The low voltage side 400V power supply to the living area is directly connected to the terminal equipment, reducing the power loss caused by multi-stage transformers (comprehensive efficiency improvement of 12%-15%). Dynamic load distribution: The intelligent control system can adjust the power distribution between high and low voltage sides as needed to adapt to load fluctuations and avoid overload or power waste caused by the single output of traditional units; High-precision dynamic coupling technology is adopted: through the coordinated fixing system composed of couplings and connecting plates, the axial-radial six-degree-of-freedom precise alignment of the high and low voltage dual power generation sections is achieved, ensuring the seamless connection of the energy transmission interface; The working principle of this utility model is as follows: a high-voltage and low-voltage dual-output generator for high-altitude environments and its shaft connection structure, mainly comprising two parts: a high-voltage generator and a low-voltage generator. The high-voltage generator part includes: a high-voltage front end cover 1, a high-voltage stator 2, a high-voltage rotor 3, a high-voltage rear end cover 4, a high-voltage junction box 5, and a coupling 6; the low-voltage generator part includes: a low-voltage fan 7, a low-voltage rotor 8, a low-voltage stator 9, a low-voltage junction box 10, a low-voltage rear end cover 11, and a mounting bracket 12. The key feature is that the coupling 6 is installed at the rear end of the high-voltage rotor 3, and the low-voltage rotor 8 is connected to the coupling 6 via a coupling plate 81 to achieve shaft connection. Simultaneously, the low-voltage fan 7 is also installed and fixed on the coupling 6; the low-voltage stator 9 is installed and fixedly connected to the high-voltage rear end cover 5, and the connection between the two is further strengthened by adding the mounting bracket 12.

[0021] The high-voltage stator coil 23 is embedded in the high-voltage stator core 22 and then fixed to the high-voltage frame 21. It adopts a double-layer anti-corona structure and adds a nano-alumina insulation layer between the winding turns to better adapt to the high-altitude environment. The high-voltage front end cover 1 and the high-voltage rear end cover 4 are fixed at both ends of the high-voltage frame 21. The high-voltage rotor 3 is fixed to the high-voltage front end cover 1 and the high-voltage rear end cover 4 through the high-voltage front bearing 32 and the high-voltage rear bearing 37. All of the above together form the main body of the high-voltage generator section. The high-voltage generator section has a double bearing structure and generates 10.5kV electricity.

[0022] The rear end of the low-voltage rotor 8 is fixed to the low-voltage rear end cover 11 via a low-voltage bearing 87. The low-voltage rear end cover 11 is then bolted to the low-voltage stator 9, which is bolted to the high-voltage rear end cover 5. An additional bracket 12 is added at the lower end to connect the two, enhancing stability and effectively reducing vibration during operation. The front end of the low-voltage rotor 8 is bolted to the coupling 6 via a coupling plate 81, which is then fixed to the high-voltage shaft 31. This secures the low-voltage generator section, which is a single-bearing structure and generates 400V electricity.

[0023] Its working principle is as follows: The diesel engine rotates, driving the high-voltage shaft 31 to rotate, which in turn drives the high-voltage rotor 3 to rotate, causing the high-voltage stator 2 to generate 10.5kV high-voltage electricity. The coupling 6, fixed to the high-voltage shaft 31, rotates along with it. The coupling plate 81, bolted to the coupling 6, also rotates along with it, ultimately driving the low-voltage rotor 8 to rotate, and the low-voltage stator 9 to generate 400V low voltage. This allows the invention to simultaneously output both 10.5kV and 400V, solving the problem of traditional single-voltage output failing to meet the multi-voltage power needs of high-altitude areas. The coupling plate 81 on the low-voltage generator rotor 8 is connected to the high-voltage generator rotor 3 via the coupling 6. This connection is a non-rigid shaft connection. The coordinated fixing system formed by the coupling and the connecting plate achieves precise alignment of the high and low voltage dual-generation parts in six degrees of freedom (axial and radial), ensuring a seamless connection of the energy transmission interface and effectively solving the vibration transmission problem caused by the rigid connection of traditional dual-voltage generator couplings.

Claims

1. A dual-voltage output generator for high-altitude environments, comprising a high-voltage generator and a low-voltage generator; the high-voltage generator includes: a high-voltage front cover, a high-voltage stator, a high-voltage rotor, a high-voltage junction box, a high-voltage rear cover, and a coupling; the low-voltage generator includes: The generator comprises a low-pressure fan, a low-pressure rotor, a low-pressure stator, a low-pressure junction box, and a low-pressure rear end cover; a high-pressure generator has a built-in high-pressure stator and a high-pressure rotor, with the outer casing mounted via a high-pressure front end cover and a high-pressure rear end cover, and a high-pressure junction box located outside the outer casing; a low-pressure generator has a built-in low-pressure fan, a low-pressure rotor, and a low-pressure stator, with a low-pressure rear end cover located at the rear of the generator and a low-pressure junction box located externally, characterized in that: a coupling is installed at the rear end of the high-pressure rotor, and the low-pressure rotor is installed to the coupling via coupling plates, realizing the connection between the shaft systems of the high-pressure generator and the low-pressure generator; at the same time, the low-pressure fan is also installed and fixed on the coupling, and the low-pressure stator is installed and fixedly connected to the high-pressure rear end cover.

2. The high- and low-voltage dual-output generator for plateau environments according to claim 1, characterized in that: The high- and low-voltage dual-output generator also includes a mounting bracket, which is located at the lower end of the high-voltage generator and the low-voltage generator. The connection and fixation are strengthened by adding the mounting bracket.

3. The high- and low-voltage dual-output generator for plateau environments according to claim 2, characterized in that: The high-voltage generator outputs 10kV voltage and adopts a double-bearing structure, while the low-voltage generator outputs 400V voltage and adopts a single-bearing structure.

4. The high- and low-voltage dual-output generator for plateau environments according to claim 3, characterized in that: The high-voltage stator mainly consists of a high-voltage frame, a high-voltage stator core, and high-voltage coils; the high-voltage rotor consists of a high-voltage shaft, a high-voltage front bearing, a high-voltage fan, a high-voltage rotor core, high-voltage rotor coils, a high-voltage exciter rotor, and a high-voltage rear bearing; the high-voltage frame contains the high-voltage stator core and high-voltage coils.

5. The high- and low-voltage dual-output generator for plateau environments according to claim 4, characterized in that: The low-voltage stator is mainly composed of a low-voltage frame, a low-voltage stator core, and low-voltage coils. The low-voltage rotor is composed of coupling plates, bushings, a low-voltage shaft, a low-voltage rotor core, low-voltage rotor coils, a low-voltage exciter rotor, and low-voltage bearings. The low-voltage frame contains the low-voltage stator core and low-voltage coils.

6. The high- and low-voltage dual-output generator for plateau environments according to claim 5, characterized in that: The high-voltage generator shaft is connected to the diesel engine. During operation, the diesel engine drives the high-voltage generator to generate electricity. At the same time, the coupling at the rear end of the high-voltage generator is connected to the coupling plate of the low-voltage generator, which drives the low-voltage generator at the rear end to rotate and generate electricity.

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