An electric motor gear speed-variable generator set

Abstract

The present invention discloses a motor gear-variable generator set, which includes a transmission speed-changing system, a torque system, a reduction box base, a reduction box upper seat and a generator. The generator set disclosed by the present invention is conducive to the generator working more smoothly and labor-saving by adding an inertia wheel with a larger mass, adopts a two-stage speed change system, avoids the rapid change of the rotation speed, and can make energy conduction more stable, safe and reliable; at the same time, an advanced process is adopted to prepare a high-silicon steel sheet with a Si content of 5-6wt.% for making an iron core, and the advantages of low iron loss, high magnetic permeability and low magnetostriction coefficient of high-silicon steel are utilized to further reduce the loss of electric energy. The generator set has the characteristics of high efficiency and low loss, and the overall structure is simple, convenient for disassembly and transportation, long service life, and has significant economic benefits and use value.

Description

Technical Field

[0001] The present invention relates to a generator set, in particular to a motor gear speed-variable generator set. Background Art

[0002] With the depletion of non-renewable energy sources like coal and oil, humanity urgently needs to explore new power generation resources and generator sets to provide the electricity needed for production and daily life. Currently, the most widely used power generation resources are hydropower and wind power, which are naturally derived, low-cost, and low-pollution. However, hydropower and wind energy vary greatly around the world, and different flow rates (wind speeds) also place different requirements on generator sets. Therefore, there is an urgent need for a generator set that can be universally applied in various conditions, with smooth energy transmission, safety, and reliability.

[0003] Silicon steel, on the other hand, is a crucial magnetic material used in the power and telecommunications industries to manufacture generators, motors, transformers, mutual inductors, relays, and other electrical instruments, accounting for approximately 90-95% of all magnetic materials. Because magnetic materials inevitably experience losses during use, improving the magnetic properties of silicon steel, particularly reducing iron loss, is crucial for energy conservation and improving electrical efficiency. It has been estimated that reducing iron loss in silicon steel sheets by just 0.1% in my country could save 4-5 billion kilowatt-hours of electricity annually.

[0004] As the silicon content increases, the performance of the iron core made of silicon steel also improves significantly. When the silicon content reaches 6.5wt.%, the iron loss can be greatly reduced, the magnetic permeability can be increased, and the magnetostriction coefficient is almost zero. Therefore, high silicon steel has broad application prospects.

[0005] However, silicon steel is difficult to prepare, especially high-silicon steel. As the Si content increases, high-silicon steel becomes both hard and brittle, making it difficult to prepare using traditional methods. Consequently, there have been no major breakthroughs in its preparation and use. In recent years, with the emergence of new technologies, scholars from various countries have developed a variety of methods to prepare high-silicon steel, such as CVD and rapid solidification. However, these methods are costly and have poor surface quality, making them unsuitable for industrial mass production.

[0006] Therefore, how to provide an efficient generator set and improve the preparation process of high-silicon steel to produce advanced core materials is of great practical significance for ensuring my country's power supply. Summary of the Invention

[0007] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a high-efficiency and low-loss motor-gear variable-speed generator set, which is achieved through the following technical solutions:

[0008] The utility model relates to a motor gear speed-variable generator set, comprising a transmission speed-variable system, a torque system, a reduction box base, a reduction box upper seat and a generator.

[0009] The transmission speed change system consists of an electric motor, a first coupling, a primary transmission driving gear, a primary transmission intermediate gear, a primary transmission driven gear, a secondary transmission driving gear, and a secondary transmission driven gear; the torque system consists of an inertia wheel, an electromagnetic device, an electromagnetic device driving gear, and a second coupling.

[0010] The first coupling connects the output shaft of the electric motor and the axle of the primary transmission driving gear, and the primary transmission driving gear, the primary transmission intermediate gear, the primary transmission driven gear, the secondary transmission driving gear, and the secondary transmission driven gear are meshed with each other in sequence; the secondary transmission driven gear and the inertia wheel are on the same axle, the electromagnetic device and the electromagnetic device driving gear are on the same axle, the secondary transmission driven gear and the electromagnetic device driving gear are meshed with each other, and the inertia wheel and the electromagnetic device are connected in non-fixed contact. The second coupling connects the axle of the secondary transmission driven gear and the input shaft of the generator.

[0011] Furthermore, the iron core of the generator is formed by stacking high-silicon steel sheets, and the Si content of the high-silicon steel sheets is 5-6wt.%.

[0012] Furthermore, the preparation method of the high silicon steel sheet is:

[0013] (1) Using 99.6 wt.% pure industrial Fe, 99 wt.% pure metallic Si, and 21 wt.% boron ferroboride as raw materials, and considering the ignition loss of each element, the amount of each raw material required to prepare high silicon steel with a Si content of 5-6 wt.% is calculated;

[0014] (2) Melting the prepared raw materials in a vacuum induction furnace at a temperature of 1250-1400°C, repeatedly melting for 4-6 times to obtain a molten alloy ingot;

[0015] (3) hot forging the smelted alloy ingot at 900-1100°C, and performing hot forging roughing and drawing for 3 times. The forging temperature of the first two roughing and drawing is strictly controlled not to be lower than 900°C. After the third roughing and drawing, hot forging is stopped. After the temperature drops to 700-850°C, cold forging is started to obtain a flat rectangular forging. The forging is then annealed at a temperature of 700-800°C for 1-2 hours.

[0016] (4) hot rolling the forging at 920-1000°C, annealing after rolling to the limit, the annealing temperature is 800-1000°C, the annealing time is 1-2 hours, and then cold rolling is performed at a temperature of 200-300°C to obtain a cold-rolled high silicon steel sheet;

[0017] (5) Cutting the cold-rolled high-silicon steel sheet.

[0018] The beneficial effects of the present invention are as follows: First, the motor gear speed-variable generator set provided by the present invention is installed on a reduction box body composed of an upper seat and a base, which is convenient for disassembly and transportation, and is convenient for lubrication and heat dissipation through the gear oil in the box to increase the service life of the gear set. Secondly, the inertia wheel has a large mass and can store kinetic energy to transmit rotational inertia to the output end, which is conducive to smoother and more labor-saving operation of the generator; and the electromagnetic device, under the power of the wheel shaft, will also give the inertia wheel a certain additional driving force to increase the rotational inertia. Thirdly, the use of a two-stage speed change system avoids the rapid change of the rotation speed, which can make the energy conduction more stable, safe and reliable, and will not cause more energy loss. Finally, high silicon steel sheets with a Si content of 5-6wt.% are prepared by advanced technology and used to make iron cores. The advantages of low iron loss, high magnetic permeability and low magnetostriction coefficient of high silicon steel are utilized to further reduce the loss of electric energy, which has significant economic benefits and use value. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a front view of a motor-gear variable speed generator set in Example 1;

[0020] Figure 2 This is a top view of the AA section of a motor-gear variable-speed generator set in Example 1;

[0021] The names of the accompanying drawings are: 1 motor, 2 first coupling, 3 primary transmission driving gear, 4 reduction housing base, 5 reduction housing upper seat, 6 primary transmission intermediate gear, 7 primary transmission driven gear, 8 secondary transmission driving gear, 9 secondary transmission driven gear, 10 inertia wheel, 11 electromagnetic device, 12 electromagnetic device driving gear, 13 second coupling, 14 generator. DETAILED DESCRIPTION

[0022] The following are preferred embodiments of the present invention.

[0023] Example 1

[0024] like Figure 1-2 The motor gear speed-variable generator set shown includes a transmission speed-variable system, a torque system, a reduction gear box base 4, a reduction gear box upper base 5 and a generator 14.

[0025] The transmission speed change system consists of an electric motor 1, a first coupling 2, a first-stage transmission driving gear 3, a first-stage transmission intermediate gear 6, a first-stage transmission driven gear 7, a second-stage transmission driving gear 8, and a second-stage transmission driven gear 9; the torque system consists of an inertia wheel 10, an electromagnetic device 11, an electromagnetic device drive gear 12, and a second coupling 13.

[0026] The first coupling 2 connects the output shaft of the motor 1 and the axle of the primary transmission driving gear 3, and the primary transmission driving gear 3, the primary transmission intermediate gear 6, the primary transmission driven gear 7, the secondary transmission driving gear 8, and the secondary transmission driven gear 9 are meshed with each other in sequence; the secondary transmission driven gear 9 and the inertia wheel 10 are on the same axle, the electromagnetic device 11 and the electromagnetic device drive gear 12 are on the same axle, the secondary transmission driven gear 9 and the electromagnetic device drive gear 12 are meshed with each other, and the inertia wheel 10 and the electromagnetic device 11 are connected in non-fixed contact. The second coupling 13 connects the axle of the secondary transmission driven gear 9 and the input shaft of the generator 14.

[0027] The iron core of the generator 14 is made of stacked high-silicon steel sheets, the Si content of the high-silicon steel sheets is 5 wt.%, and the preparation method is as follows:

[0028] (1) Using 99.6 wt.% pure industrial Fe, 99 wt.% pure metallic Si, and 21 wt.% boron ferroboride as raw materials, and considering the ignition loss of each element, the amount of each raw material required to prepare high silicon steel with a Si content of 5 wt.% was calculated.

[0029] (2) The prepared raw materials are melted in a vacuum induction furnace at a temperature of 1300°C, and the melting is repeated 4 times to obtain a molten alloy ingot;

[0030] (3) The smelted alloy ingot is hot forged at 1000℃, and the hot forging roughing and drawing is performed three times. The forging temperature of the first two roughing and drawing is strictly controlled not to be lower than 900℃. After the third roughing and drawing, the hot forging is stopped. After the temperature drops to 700℃, cold forging is started to obtain a flat rectangular forging. The forging is then annealed at 700℃ for 2h.

[0031] (4) The forging is hot rolled at 950°C, annealed after rolling to the limit, the annealing temperature is 800°C, the annealing time is 2h, and then cold rolled at 200°C to obtain a cold-rolled high silicon steel sheet;

[0032] (5) Cutting of cold-rolled high silicon steel sheets.

[0033] Example 2

[0034] The same as Example 1, except that the core of the generator 14 is made of stacked high-silicon steel sheets, the Si content of the high-silicon steel sheets is 6 wt.%, and the preparation method is:

[0035] (1) Using 99.6 wt.% pure industrial Fe, 99 wt.% pure metallic Si, and 21 wt.% boron ferroboride as raw materials, and considering the ignition loss of each element, the amount of each raw material required to prepare high silicon steel with a Si content of 6 wt.% was calculated.

[0036] (2) The prepared raw materials are melted in a vacuum induction furnace at a temperature of 1400°C and repeatedly melted 6 times to obtain a molten alloy ingot;

[0037] (3) The smelted alloy ingot is hot forged at 1100℃, and the hot forging roughing and drawing is performed three times. The forging temperature of the first two roughing and drawing is strictly controlled not to be lower than 900℃. After the third roughing and drawing, the hot forging is stopped. After the temperature drops to 850℃, cold forging is started to obtain a flat rectangular forging. The forging is then annealed at 800℃ for 1h.

[0038] (4) The forging is hot rolled at 1000°C, annealed after rolling to the limit, the annealing temperature is 1000°C, the annealing time is 1h, and then cold rolled at 300°C to obtain a cold-rolled high silicon steel sheet;

[0039] (5) Cutting of cold-rolled high silicon steel sheets.

Claims

1. A motor gear speed-variable generator set, comprising a transmission speed-variable system, a torque system, a reduction gearbox base, a reduction gearbox upper base, and a generator, characterized in that: The transmission speed change system consists of an electric motor, a first coupling, a primary transmission driving gear, a primary transmission intermediate gear, a primary transmission driven gear, a secondary transmission driving gear, and a secondary transmission driven gear; the torque system consists of an inertia wheel, an electromagnetic device, an electromagnetic device driving gear, and a second coupling; the first coupling connects the output shaft of the electric motor and the axle of the primary transmission driving gear, and the primary transmission driving gear, the primary transmission intermediate gear, the primary transmission driven gear, the secondary transmission driving gear, and the secondary transmission driven gear are meshed with each other in sequence; the secondary transmission driven gear and the inertia wheel are on the same axle, the electromagnetic device and the electromagnetic device driving gear are on the same axle, the secondary transmission driven gear and the electromagnetic device driving gear are meshed with each other, the inertia wheel and the electromagnetic device are connected in non-fixed contact, and the second coupling connects the axle of the secondary transmission driven gear and the input shaft of the generator; The iron core of the generator is made of stacked high silicon steel sheets, and the Si content of the high silicon steel sheets is 5-6wt.%; The preparation method of the high silicon steel sheet is: (1) Using 99.6 wt.% pure industrial Fe, 99 wt.% pure metallic Si, and 21 wt.% boron ferroboride as raw materials, and considering the ignition loss of each element, the amount of each raw material required to prepare high silicon steel with a Si content of 5-6 wt.% is calculated; (2) Melting the prepared raw materials in a vacuum induction furnace at a temperature of 1250-1400°C, repeatedly melting for 4-6 times to obtain a molten alloy ingot; (3) hot forging the smelted alloy ingot at 900-1100°C, and performing hot forging roughing and drawing for 3 times. The forging temperature of the first two roughing and drawing is strictly controlled not to be lower than 900°C. After the third roughing and drawing, hot forging is stopped. After the temperature drops to 700-850°C, cold forging is started to obtain a flat rectangular forging. The forging is then annealed at a temperature of 700-800°C for 1-2 hours. (4) hot rolling the forging at 920-1000°C, annealing after rolling to the limit, the annealing temperature is 800-1000°C, the annealing time is 1-2 hours, and then cold rolling is performed at a temperature of 200-300°C to obtain a cold-rolled high silicon steel sheet; (5) Cutting the cold-rolled high-silicon steel sheet.

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