A disc type structure self-excitation generator and its installation method

Abstract

A disc type structure self-excitation generator and its installation method, the generator rotor is installed on the flywheel through the connecting shaft, the generator stator is connected to the flywheel shell through the generator shell, the generator structure is compact, the length is greatly shortened compared with the traditional self-excitation generator, the generator can be directly installed on the engine power output end without using the generator foot, the length of the internal combustion generator set is greatly shortened, and it is especially suitable for occasions with higher requirements for the length of the generator set; the generator shell machine base has good heat dissipation effect and high strength, the fan blades are installed on the connecting shaft, the fan blades rotate to generate negative pressure, cold air is sucked from the air inlet, the cold air exchanges heat with the equipment in the generator to become hot air, and finally is discharged through the air outlet, the whole heat dissipation channel is reasonably arranged, the space utilization rate is high, and good heat dissipation effect can be achieved in the generator.

Description

Technical Field

[0001] This invention relates to the field of generator technology, and in particular to a disc-type self-excited generator and its installation method. Background Technology

[0002] Existing generators obtain kinetic energy from an engine and convert it into electrical energy. For example, Chinese Patent Publication No. CN208835930U describes a naturally cooled DC brushless electrically excited auxiliary generator structure, including a heat dissipation shell, a front cover, and a rear heat dissipation end cover. The key feature is that one end of the heat dissipation shell is fixedly connected to the front cover, and the other end is fixedly connected to the rear heat dissipation end cover. The heat dissipation shell, front cover, and rear heat dissipation end cover form a cavity. A brushless rotor is disposed within the cavity and fitted onto one end of a shaft. A coupling is installed at the other end of the shaft, and the other end of the coupling is fixedly connected to the engine flywheel. A stator is fixed to the inner wall of the heat dissipation shell, and an excitation assembly is fixed to the inner wall of the rear heat dissipation end cover. Heat dissipation fins are provided on the heat dissipation shell, front cover, and rear heat dissipation end cover. A transfer plate is fixedly connected to the front cover, and the other end of the transfer plate is fixedly connected to the engine flywheel housing. This traditional generator structure is large and has poor heat dissipation. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a disc-type self-excited generator and its installation method, which has a compact structure, small size and good heat dissipation effect.

[0004] To solve the above-mentioned technical problems, the technical solution of the present invention is: a disc-type self-excited generator, comprising an engine and a generator connected to the engine. The engine includes a flywheel located at one end of the engine shaft and a flywheel housing protecting the flywheel. The generator includes a generator main stator core, a generator main stator coil, a rotor core, an exciter stator core, an exciter stator coil, an exciter rotor coil, and a generator housing. The generator housing includes a side panel, an end panel located at one end of the side panel, and a mating opening located at the other end of the side panel. The side panel includes a base and a plurality of first hundred blades distributed around the circumference of the base. The gap between adjacent first hundred blades forms an air outlet. The base is fixedly connected to the flywheel housing by bolts. The end panel is provided with a plurality of second hundred blades. The gap between adjacent second hundred blades forms an air inlet. The inner side of the end panel extends inward to form a mounting base. The rotor core is connected to the end face of the flywheel through a connecting shaft passing through the mating opening of the side panel. The connecting shaft includes a first flange, a second flange, and a connecting first flange. The first flange is connected to a second flange. The first flange is conical and has several ventilation holes on its surface. The outer edge of the first flange has several fan blades evenly distributed around its circumference. Each fan blade includes a blade body and a movable baffle plate on one side of the blade body. The inner side of the generator housing has a fixed baffle plate. The movable baffle plate cooperates with the fixed baffle plate. The fixed baffle plate and the inner side of the generator housing form a gas flow channel communicating with the air outlet. The air inlet, ventilation holes, fan blades, gas flow channel, and air outlet form a heat dissipation channel inside the generator. The second flange is fixedly connected to the rotor core. The generator main stator core is fixed to the frame with bolts. The generator main stator coil is fixed to the generator main stator core. The generator rotor coil is located on the outside of the rotor core and corresponds to the generator stator coil. The exciter rotor coil is located on the inside of the rotor core. The exciter stator core is fitted onto the mounting base. The exciter stator coil is located on the outside of the exciter stator core and corresponds to the exciter rotor coil. The generator rotor of this invention is mounted on the flywheel via a connecting shaft, and the generator stator is connected to the flywheel housing via the generator housing. This generator has a compact structure and its length is significantly shorter than that of traditional self-excited generators. It can be directly mounted to the engine power output end without using generator feet, greatly reducing the length of the internal combustion generator set. It is particularly suitable for applications with higher requirements for generator set length. The generator housing base has good heat dissipation and high strength. The fan blades are mounted on the connecting shaft. The rotation of the fan blades generates negative pressure, drawing in cold air from the air inlet. The cold air exchanges heat with the equipment inside the generator and becomes hot air before finally being discharged through the air outlet. The entire heat dissipation channel is reasonably designed and has high space utilization, which can achieve a good heat dissipation effect inside the generator.

[0005] As an improvement, the second flange is connected to the inner side of the rotor core via a connecting positioning element. The connecting positioning element includes a first connecting plate and a second connecting plate located outside the first connecting plate. A step is formed at the connection between the first connecting plate and the second connecting plate. A step groove is provided on the inner side of the second flange. The step and the step groove cooperate. The first locking screw passes through the rotor core and is threaded to the first connecting plate. The second locking screw passes through the rotor core and the second connecting plate and is threaded to the second flange.

[0006] As an improvement, the first locking screw locks the rectifier diode to the outer surface of the rotor core.

[0007] As an improvement, one end of the mounting base is provided with a stop, and the other end of the mounting base is provided with an annular groove. A retaining spring is provided in the annular groove, and the retaining spring and the stop clamp the exciter stator core.

[0008] As an improvement, the fan blades are connected into a single impeller via a connecting ring.

[0009] The installation method of this invention includes the following steps: (1) Fix the connecting shaft to the flywheel, and fix the first flange of the connecting shaft to the flywheel with bolts; (2) Install the fan blades onto the first flange of the connecting shaft; (3) The rotor core, generator main rotor coil, rectifier diode and exciter rotor coil are combined to form the generator rotor; (4) Install the generator rotor onto the second flange of the connecting shaft; (5) Install the generator main stator core onto the inside of the frame, install the generator main stator coil onto the generator main stator core, and install the exciter stator core onto the mounting base to form the generator stator; (6) The generator stator is fixed to the flywheel housing through the generator housing.

[0010] The beneficial effects of this invention compared to the prior art are: The generator rotor of this invention is mounted on the flywheel via a connecting shaft, and the generator stator is connected to the flywheel housing via the generator housing. This generator has a compact structure and its length is significantly shorter than that of traditional self-excited generators. It can be directly mounted to the engine power output end without using generator feet, greatly reducing the length of the internal combustion generator set. It is particularly suitable for applications with higher requirements for generator set length. The generator housing base has good heat dissipation and high strength. The fan blades are mounted on the connecting shaft. The rotation of the fan blades generates negative pressure, drawing in cold air from the air inlet. The cold air exchanges heat with the equipment inside the generator and becomes hot air before finally being discharged through the air outlet. The entire heat dissipation channel is reasonably designed and has high space utilization, which can achieve a good heat dissipation effect inside the generator. Attached Figure Description

[0011] Figure 1 This is a partial schematic diagram of the invention.

[0012] Figure 2 This is a schematic diagram of the airflow direction of the heat dissipation channel you invented.

[0013] Figure 3 This is a sectional view of the connecting axis.

[0014] Figure 4 This is a schematic diagram showing the connection between the flywheel and the connecting shaft.

[0015] Figure 5 This is a schematic diagram showing the connection between the shaft, flywheel, and fan blades.

[0016] Figure 6 This is a schematic diagram showing the connection between the shaft, flywheel, fan blades, and generator rotor.

[0017] Figure 7 This is a schematic diagram showing the connection between the shaft, flywheel, fan blades, generator rotor, and generator stator. Implementation

[0018] The present invention will now be further described with reference to the accompanying drawings.

[0019] A disc-type self-excited generator includes an engine and a generator connected to the engine.

[0020] like Figure 1 As shown, the engine includes a flywheel 13 located at one end of the engine shaft and a flywheel housing 2 protecting the flywheel 13. The flywheel 13 is located at one end of the engine, one end of the flywheel housing 2 is connected to the engine housing, and the other end of the flywheel housing 2 is provided with a connecting seat and connected to the generator housing 1, so that the various units of the engine can be connected to form a whole. The end face of the flywheel 13 is provided with an annular groove, and an annular mounting plate is provided in the annular groove. The radially outer side of the annular mounting plate is connected to the flywheel 13 by bolts.

[0021] like Figures 1 to 3As shown, the generator includes a main stator core 2, a main stator coil 3, a rotor core 6, an exciter stator core 9, an exciter stator coil 8, an exciter rotor coil 7, and a generator housing 1. The generator housing 1 is made of aluminum alloy and includes a side panel, an end panel at one end of the side panel, and a mating opening at the other end of the side panel. The mating opening is connected to the flywheel housing 2 by bolts, allowing the flywheel 13 to be connected to the generator rotor. The side panel includes a die-cast aluminum alloy base 102 and several first louvers 101 distributed around the circumference of the base 102. The first louvers 101 are integrally formed with the base 102. The louvers on the generator housing 1 not only improve strength but also enhance heat dissipation. The gap between adjacent first louvers 101 forms an air outlet 103. The base 102 is fixedly connected to the flywheel housing 2 by bolts. The high strength of the base 102 can strengthen the connection between the generator housing 1 and the flywheel housing 2. The end panel is provided with several second louvers 104. The gap between adjacent second louvers 104 forms an air inlet 105. The air inlet 105 and the air outlet 103 are approximately distributed at 90 degrees. The inner side of the end panel extends inward to form a mounting base 106, which is integrally formed with the entire generator housing 1.The rotor core 6 is connected to the end face of the flywheel 13 via a connecting shaft 14 passing through a side panel opening. The connecting shaft 14 includes a first flange 142, a second flange 143, and a connecting plate 144 connecting the first flange 142 and the second flange 143. The connecting plate 144 is conical and has several ventilation holes 141 on its surface. The conical structure of the connecting plate 144 provides high connection strength and avoids the installation of the rotor coil. The ventilation holes 141 can serve as heat dissipation channels for airflow. The radial inner side of the first flange 142 is fixed to the radial inner side of the annular mounting plate by bolts, and the radial outer side of the first flange 142 is connected to the wind turbine by bolts. The flywheel 13 drives the connecting shaft 14, and the connecting shaft 14 drives the wind turbine to rotate. The wind turbine includes fan blades 12 evenly distributed around its circumference and a connecting ring. The connecting ring connects the individual fan blades 12 into a single unit. The fan blade 12 includes a blade body and a movable baffle 11 located on the side of the blade body near the generator. The wind turbine is constructed in an annular shape, with the movable wind baffle 11 having an L-shaped cross-section. The vertical portion of the movable wind baffle 11 is welded to the blade body, which strengthens the overall structural strength of the wind turbine. The inner side of the generator housing 1 is provided with an annular fixed wind baffle 10. This wind baffle is Z-shaped, with one end bolted to the base 102 and the other end pointing towards the horizontal portion of the movable wind baffle 11. A certain gap is maintained between the movable wind baffle 11 and the fixed wind baffle 10 to ensure the fan blades 12 can rotate. The fixed baffle and... A gas flow channel 15 is formed on the inner side of the generator housing 1, which is connected to the air outlet 103. The air outlet 103 serves as the outlet end of the gas flow channel 15. The gap between the fixed baffle plate 10 and the end face of the wind turbine forms the inlet end of the gas flow channel 15. The fan blades 12 point towards this inlet end, so that the airflow generated by the rotation of the fan blades 12 directly enters the gas flow channel 15. The air inlet 105, ventilation hole 141, fan blades 12, gas flow channel 15 and air outlet 103 form a heat dissipation channel inside the generator.The second flange 143 is connected to the inner side of the rotor core 6 via a connecting positioning component. The connecting positioning component includes a first connecting plate and a second connecting plate located outside the first connecting plate. A step is formed at the connection between the first and second connecting plates. A step groove is provided on the inner side of the second flange 143, and the step mates with the step groove. A first locking screw passes through the rotor core 6 and is threaded onto the first connecting plate. A second locking screw passes through the rotor core 6 and the second connecting plate and is threaded onto the second flange 143. The first locking screw locks the rectifier diode onto the outer surface of the rotor core 6. The radial outer side of the generator main stator core 2 is connected via... The generator is bolted to the base 102. The generator main stator coil 3 is fixed on the radial inner side of the generator main stator core 2. The generator rotor coil is located on the radial outer side of the rotor core 6 and corresponds to the generator stator coil. The exciter rotor coil 7 is located on the radial inner side of the rotor core 6. The exciter stator core 9 is sleeved on the mounting base 106. The exciter stator coil 8 is located on the radial outer side of the exciter stator core 9 and corresponds to the exciter rotor coil 7. One end of the mounting base 106 is provided with a stop, and the other end of the mounting base 106 is provided with an annular groove. A retaining spring is provided in the annular groove. The retaining spring and the stop clamp the exciter stator core 9.

[0022] When the generator rotor rotates under the drive of the engine, the residual magnetic voltage of the generator main stator is supplied to the automatic voltage regulator. The automatic voltage regulator controls the output of the excitation current to the exciter stator. Under the action of the magnetic field, the exciter rotor generates voltage and is rectified into DC by the rectifier diodes and supplied to the rotating generator main rotor. Under the action of the main magnetic field, the generator main stator voltage rises and reaches a stable voltage rating.

[0023] The installation method of this invention includes the following steps: (1) such as Figure 4 As shown, the connecting shaft 14 is fixed to the flywheel 13, and the first flange 142 of the connecting shaft 14 is fixed to the flywheel 13 by bolts; (2) such as Figure 5 As shown, the fan blade 12 is mounted onto the first flange 142 of the connecting shaft 14; (3) Combine the rotor core 6, the generator main rotor coil, the rectifier diode and the exciter rotor coil 7 to form the generator rotor; (4) such as Figure 6 As shown, the generator rotor is mounted onto the second flange 143 of the connecting shaft 14; (5) Install the generator main stator core 2 into the inner side of the frame 102, install the generator main stator coil 3 onto the generator main stator core 2, and install the exciter stator core 9 onto the mounting base 106 to form the generator stator; (6) For example Figure 7As shown, the generator stator is fixed to the flywheel housing 2 via the generator housing 1.

[0024] The generator rotor of this invention is mounted on the flywheel 13 via the connecting shaft 14, and the generator stator is connected to the flywheel housing 2 via the generator housing 1. This generator has a compact structure and its length is significantly shorter than that of traditional self-excited generators. It can be directly mounted to the engine power output end without using generator feet, which greatly shortens the length of the internal combustion generator set. It is particularly suitable for occasions with higher requirements for generator set length. The generator housing 1 and the base 102 have good heat dissipation effect and high strength. The fan blades 12 are mounted on the connecting shaft 14. The rotation of the fan blades 12 generates negative pressure, which draws in cold air from the air inlet 105. After the cold air exchanges heat with the equipment inside the generator and becomes hot air, it is finally discharged through the air outlet 103. The entire heat dissipation channel is reasonably set up and has a high space utilization rate, which can play a good heat dissipation role inside the generator.

Claims

1. A disc-type self-excited generator, comprising an engine and a generator connected to the engine, wherein the engine includes a flywheel disposed at one end of the engine shaft and a flywheel housing protecting the flywheel, and the generator includes a generator main stator core, a generator main stator coil, a rotor core, an exciter stator core, an exciter stator coil, an exciter rotor coil, and a generator housing; characterized in that: The generator housing includes a side panel, an end panel at one end of the side panel, and a mating opening at the other end of the side panel. The side panel includes a base and several first hundred blades distributed circumferentially around the base. The gap between adjacent first hundred blades forms an air outlet. The base is fixedly connected to the flywheel housing by bolts. The end panel has several second hundred blades, and the gap between adjacent second hundred blades forms an air inlet. The inner side of the end panel extends inward to form a mounting base. The rotor core is connected to the end face of the flywheel through a connecting shaft passing through the mating opening of the side panel. The connecting shaft includes a first flange, a second flange, and a connecting plate connecting the first flange and the second flange. The connecting plate is conical and has several ventilation holes on its surface. The outer edge of the first flange has several circumferentially evenly distributed fan blades. Each fan blade includes a blade body and a movable baffle plate on one side of the blade body. The inner side of the generator housing has a fixed baffle plate. The movable baffle plate cooperates with the fixed baffle plate. The fixed baffle plate and the inner side of the generator housing form a gas flow channel communicating with the air outlet. The air inlet, ventilation holes, fan blades, gas flow channels, and air outlet form a heat dissipation channel inside the generator. The second flange is fixedly connected to the rotor core. The generator main stator core is fixed to the frame with bolts. The generator main stator coil is fixed on the generator main stator core. The generator rotor coil is located on the outside of the rotor core and corresponds to the generator stator coil. The exciter rotor coil is located on the inside of the rotor core. The exciter stator core is fitted onto the mounting base. The exciter stator coil is located on the outside of the exciter stator core and corresponds to the exciter rotor coil. The second flange is connected to the inner side of the rotor core through a connecting positioning component. The connecting positioning component includes a first connecting plate and a second connecting plate located on the outside of the first connecting plate. A step is formed at the connection between the first connecting plate and the second connecting plate. The inner side of the second flange is provided with a step groove. The step and the step groove cooperate. The first locking screw passes through the rotor core and is threadedly connected to the first connecting plate. The second locking screw passes through the rotor core and the second connecting plate and is threadedly connected to the second flange.

2. A disc-type self-excited generator according to claim 1, characterized in that: The first locking screw locks the rectifier diode to the outer surface of the rotor core.

3. A disc-type self-excited generator according to claim 1, characterized in that: One end of the mounting base is provided with a stop, and the other end of the mounting base is provided with an annular groove. A retaining spring is provided in the annular groove, and the retaining spring and the stop clamp the exciter stator core.

4. A disc-type self-excited generator according to claim 1, characterized in that: The fan blades are connected into a single wind turbine via a connecting ring.

5. A method for installing a disc-type self-excited generator as described in claim 1, characterized in that, Includes the following steps: (1) Fix the connecting shaft to the flywheel, and fix the first flange of the connecting shaft to the flywheel with bolts; (2) Install the fan blades onto the first flange of the connecting shaft; (3) The rotor core, generator main rotor coil, rectifier diode and exciter rotor coil are combined to form the generator rotor; (4) Install the generator rotor onto the second flange of the connecting shaft; (5) Install the generator main stator core onto the inside of the frame, install the generator main stator coil onto the generator main stator core, and install the exciter stator core onto the mounting base to form the generator stator; (6) The generator stator is fixed to the flywheel housing through the generator housing.

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