Heat dissipation structure of brushless excitation generator

Abstract

The utility model relates to the technical field of excitation generators, and especially relates to a brushless excitation generator heat radiation structure. The brushless excitation generator heat dissipation structure comprises a lower shell and a main shaft, a rectifying ring, a main exciter and an auxiliary exciter are sequentially arranged on the main shaft from left to right, a cooling cavity is formed in the bottom end of the lower shell, and a ventilation groove communicated with the cooling cavity is formed in the lower shell; the first wind blade is fixedly arranged on the main shaft in a sleeving mode and located between the rectifying ring and the main exciter; the second wind blade is fixedly arranged on the main shaft in a sleeving mode and located between the main exciter and the auxiliary exciter; the water cooling assembly is embedded in the cooling cavity; the front end cover is installed at the front end of the lower shell through screws, and a first guide pipe communicated with the cooling cavity is installed on the front end cover; the rear end cover is installed at the rear end of the lower shell through screws, and a second guide pipe communicated with the cooling cavity is installed on the rear end cover. The brushless excitation generator heat radiation structure provided by the utility model has the advantages of good heat radiation performance and convenience in stable movement of a unit.

Description

Technical Field

[0001] This utility model relates to the field of excitation generator technology, and in particular to a heat dissipation structure for a brushless excitation generator. Background Technology

[0002] A brushless excitation generator is a type of excitation generator. Its brushless excitation system is also called rotating silicon excitation because the silicon rectifier is mounted on the rotor shaft and rotates with the shaft during operation. This excitation method has two excitation generators, called the main exciter and the auxiliary exciter. The rotor power of the main generator is supplied by the three-phase AC power output from the rotor of the main exciter generator, which is rectified by the rotating silicon rectifier mounted on the main shaft. The rotor of the auxiliary exciter generator has permanent magnet poles and is coaxial with the main generator. The stator output voltage of the auxiliary exciter generator is input to an automatic voltage regulator. The output voltage of the automatic voltage regulator controls the stator excitation winding of the main exciter generator, so that the rotor of the main exciter generator has voltage output.

[0003] During the generation of a single generator, heat is generated inside the unit, which can lead to excessively high internal temperatures and affect power generation efficiency. This is especially true when using a brushless excitation generator, where excessively high temperatures can easily damage the rectifier tubes inside the rectifier ring. However, existing brushless excitation generators mainly rely on a single cooling fan for heat dissipation, resulting in low heat dissipation efficiency.

[0004] Therefore, it is necessary to provide a new heat dissipation structure for brushless excitation generators to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a heat dissipation structure for a brushless excitation generator with excellent heat dissipation performance.

[0006] The heat dissipation structure of the brushless exciter generator provided by this utility model includes: a lower housing and a main shaft rotatably mounted on the lower housing. The main shaft is provided with a rectifier ring, a main exciter and an auxiliary exciter from left to right. A cooling cavity is opened at the bottom of the lower housing, and a ventilation slot communicating with the cooling cavity is opened inside the lower housing.

[0007] One fan blade is fixedly sleeved on the main shaft and located between the rectifier ring and the main exciter;

[0008] Two fan blades are fixedly sleeved on the main shaft and located between the main exciter and the auxiliary exciter;

[0009] A water-cooling assembly is embedded within the cooling cavity;

[0010] A front cover is installed on the front end of the lower housing by screws, and a conduit communicating with the cooling chamber is installed on the front cover;

[0011] The rear end cover is installed at the rear end of the lower housing by screws, and a second conduit communicating with the cooling chamber is installed on the rear end cover. An upper housing that covers the lower housing is installed between the rear end cover and the front end cover by screws. An air-cooling component is also embedded on the rear end cover.

[0012] Preferably, the wind direction of both wind blade one and wind blade two is towards the main exciter.

[0013] Preferably, the water-cooling assembly includes a sealing plate, a water tank, a circulating pump, a circulating water pipe, and heat exchange fins. The sealing plate is installed at the bottom of the lower housing with screws and seals the cooling chamber. The water tank is fixedly installed at the bottom of the sealing plate and is filled with coolant. Multiple semiconductor coolers are embedded at the bottom of the water tank. The circulating pump is fixedly installed on the outer wall of the water tank. The inlet of the circulating pump is connected to the water tank, and the outlet of the circulating pump is connected to the circulating water pipe. The circulating water pipe is installed at the top of the sealing plate, and the end of the circulating water pipe away from the circulating pump is connected to the water tank. Several heat exchange fins are evenly installed on the circulating water pipe.

[0014] Preferably, the circulating water pipe is in a continuously curved S-shape, and the heat exchange plate is composed of two opposing baffles snapped onto the S-shaped circulating water pipe, and each of the two opposing baffles has multiple ventilation holes.

[0015] Preferably, a drive shaft is rotatably mounted on the front end cover, one end of the drive shaft is connected to the main shaft via a coupling, and the other end of the drive shaft is equipped with a pulley.

[0016] Preferably, the outer side wall of the upper housing is formed into continuous folds.

[0017] Preferably, the air-cooled assembly includes a ventilation duct, which is embedded in the rear end plate of the rear end cover. From left to right, a first filter screen, a second filter screen, and a mounting plate are sequentially embedded in the ventilation duct. A rotating rod is rotatably mounted on the mounting plate, along with a drive motor for rotating the rotating rod. A third fan blade is fixedly sleeved on the rotating rod between the second filter screen and the mounting plate, with the fan blade pointing inwards towards the rear end cover. A stirring rod is fixedly sleeved on the rotating rod between the second filter screen and the first filter screen. Activated carbon particles are filled inside the ventilation duct between the second filter screen and the first filter screen.

[0018] Compared with related technologies, the heat dissipation structure of the brushless excitation generator provided by this utility model has the following advantages:

[0019] Beneficial effects:

[0020] 1. This utility model provides a heat dissipation structure for a brushless exciter generator. By symmetrically installing fan blades one and two on both sides of the column exciter on the main shaft, when the main shaft rotates to generate electricity, the fan blades one and two rotate synchronously, drawing the cold air cooled by the cooling components in the cooling chamber into the main exciter through the front and rear ends. Then, the hot air enters the cooling chamber from the ventilation slot for recooling, forming a cooling cycle inside the unit, thereby dissipating heat from the rectifier ring, main exciter, and auxiliary exciter in the lower casing.

[0021] 2. An air-cooling component is installed on the rear cover. By using the ventilation pipe, filter screen one, filter screen two, mounting plate, rotating rod, drive motor, fan blade three, stirring rod and activated carbon particles, the air inside the lower shell can be further cooled by blowing air, and the activated carbon particles can filter and dry the air drawn into the lower shell. Attached Figure Description

[0022] Figure 1 A schematic diagram of a preferred embodiment of the heat dissipation structure for the brushless excitation generator provided by this utility model;

[0023] Figure 2 An exploded structural diagram of the heat dissipation structure of the brushless excitation generator provided by this utility model;

[0024] Figure 3 A schematic diagram of the internal structure of the heat dissipation structure for the brushless excitation generator provided by this utility model;

[0025] Figure 4 for Figure 3 The diagram shows the structure of the air-cooled component.

[0026] Figure 5 A schematic diagram of the internal air circulation of the heat dissipation structure of the brushless excitation generator provided by this utility model.

[0027] Numbered in the diagram: 1. Lower housing; 101. Cooling chamber; 102. Ventilation slot; 2. Main shaft; 21. Rectifier ring; 22. Main exciter; 23. Auxiliary exciter; 3. Fan blade one; 4. Fan blade two; 5. Water-cooled assembly; 51. Sealing plate; 52. Water tank; 521. Semiconductor cooler; 53. Circulating pump; 54. Circulating water pipe; 55. Heat exchanger; 6. Front cover; 61. Conduit one; 62. Drive shaft; 63. Pulley; 7. Rear cover; 71. Conduit two; 8. Upper housing; 9. Air-cooled assembly; 91. Ventilation pipe; 92. Filter screen one; 93. Filter screen two; 94. Mounting plate; 95. Rotating rod; 96. Drive motor; 97. Fan blade three; 98. Stirring rod; 99. Activated carbon granules. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0029] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0030] Please see Figures 1 to 5 The present invention provides a heat dissipation structure for a brushless excitation generator, which includes: a lower housing 1, a main shaft 2, a first fan blade 3, a second fan blade 4, a water cooling assembly 5, a front end cover 6, a rear end cover 7, an upper housing 8, and a wind cooling assembly 9.

[0031] The main shaft 2 is rotatably mounted on the lower housing 1. From left to right, the main shaft 2 is provided with a rectifier ring 21, a main exciter 22 and an auxiliary exciter 23. A cooling chamber 101 is provided at the bottom of the lower housing 1. A ventilation slot 102 communicating with the cooling chamber 101 is provided inside the lower housing 1.

[0032] Fan blade 3 is fixedly sleeved on the main shaft 2 and located between the rectifier ring 21 and the main exciter 22; Fan blade 4 is fixedly sleeved on the main shaft 2 and located between the main exciter 22 and the auxiliary exciter 23.

[0033] The water-cooling assembly 5 is embedded in the cooling cavity 101. The water-cooling assembly 5 includes a sealing plate 51, a water tank 52, a circulating pump 53, a circulating water pipe 54, and heat exchange plates 55. The sealing plate 51 is installed at the bottom of the lower housing 1 by screws and seals the cooling cavity 101. The water tank 52 is fixedly installed at the bottom of the sealing plate 51. The water tank 52 is filled with coolant. Multiple semiconductor coolers 521 are embedded at the bottom of the water tank 52. The circulating pump 53 is fixedly installed on the outer wall of the water tank 52. The inlet end of the circulating pump 53 is connected to the water tank 52. The outlet end of the circulating pump 53 is connected to the circulating water pipe 54. The circulating water pipe 54 is installed at the top of the sealing plate 51. The end of the circulating water pipe 54 away from the circulating pump 53 is connected to the water tank 52. Several heat exchange plates 55 are evenly installed on the circulating water pipe 54.

[0034] The front cover 6 is installed on the front end of the lower housing 1 by screws, and a conduit 61 communicating with the cooling chamber 101 is installed on the front cover 6; the rear cover 7 is installed on the rear end of the lower housing 1 by screws, and a conduit 71 communicating with the cooling chamber 101 is installed on the rear cover 7. An upper housing 8 that covers the lower housing 1 is installed between the rear cover 7 and the front cover 6 by screws, and an air-cooling component 9 is also embedded on the rear cover 7.

[0035] Among them, the wind direction of wind blade 3 and wind blade 4 is towards the main exciter 22.

[0036] It should be noted that during operation, the rotation of the main shaft 2 drives the rotors of the main exciter 22 and the auxiliary exciter 23 to rotate, thereby generating electricity. This also drives the fan blades 3 and 4 to rotate synchronously. During rotation, the cold air located in the cooling chamber 101 is drawn into the front cover 6 through duct 1 61 and into the rear cover 7 through duct 2 71. Then, it flows through the auxiliary exciter 23 and the rectifier ring 21 to the main exciter 22. After passing through the main exciter 22, the hot air undergoing heat exchange enters the cooling chamber 101 through the ventilation slot 102, and then... The heat exchanger 55 and the circulating water pipe 54 exchange heat, thereby cooling the hot air. The air is then transported back to the lower housing 1 through the first conduit 61 and the second conduit 71 for heat dissipation, thus forming an internal cooling cycle. The circulating water pipe 54 is continuously circulated by the circulating pump 53, which circulates the coolant cooled by the semiconductor cooler 521 in the water tank 52, thereby cooling the hot air into cold air for heat dissipation and cooling. Furthermore, the air can be further cooled by drawing in external low-temperature gas through the air-cooling component 9 on the rear cover 7, thereby improving the cooling efficiency.

[0037] In the embodiments of this utility model, please refer to Figure 1 and Figure 2 The circulating water pipe 54 is in a continuously curved S-shape. The heat exchange plate 55 is composed of two opposing baffles that are snapped onto the S-shaped circulating water pipe 54, and both opposing baffles are provided with multiple ventilation holes.

[0038] It should be noted that when hot air flows into the cooling chamber 101 from the ventilation slot 102 and enters the first conduit 61 and the second conduit 71 through the multiple through holes of the S-shaped circulating water pipe 54 and the heat exchange plate 55, the S-shaped circulating water pipe 54 can increase the contact area with the air, thereby facilitating the cooling of the hot air into cooling air to dissipate heat and cool the rectifier ring 21, the main exciter 22 and the auxiliary exciter 23 inside the lower housing 1.

[0039] In the embodiments of this utility model, please refer to Figure 1 and Figure 2 A drive shaft 62 is rotatably mounted on the front cover 6. One end of the drive shaft 62 is connected to the main shaft 2 via a coupling, and the other end of the drive shaft 62 is equipped with a pulley 63.

[0040] It should be noted that the power unit is connected to the pulley 63 via a belt, which drives the drive shaft 62 to rotate. The drive shaft 62 drives the main shaft 2 to rotate via a coupling, which in turn drives the rotors of the main exciter 22 and the auxiliary exciter 23 to rotate, thereby cutting the magnetic field to generate electricity.

[0041] In the embodiments of this utility model, please refer to Figure 1 and Figure 2The outer wall of the upper shell 8 is formed into continuous folds.

[0042] It should be noted that after the upper shell 8 seals the lower shell 1, the pleats increase the contact area with the outside air, which facilitates heat dissipation.

[0043] In the embodiments of this utility model, please refer to Figure 1 and Figure 4 The air-cooled assembly 9 includes a ventilation duct 91, which is embedded in the rear end plate of the rear end cover 7. From left to right, a filter screen 92, a filter screen 93, and a mounting plate 94 are sequentially embedded in the ventilation duct 91. A rotating rod 95 is rotatably mounted on the mounting plate 94, and a drive motor 96 is used to drive the rotating rod 95 to rotate. A fan blade 97 is fixedly sleeved on the rotating rod 95 between the filter screen 93 and the mounting plate 94. The airflow direction of the fan blade 97 is towards the rear end cover 7. A stirring rod 98 is fixedly sleeved on the rotating rod 95 between the filter screen 93 and the filter screen 92. Activated carbon particles 99 are filled in the ventilation duct 91 between the filter screen 93 and the filter screen 92.

[0044] It should be noted that when the main shaft 2 rotates to generate electricity, the drive motor 96 is started synchronously. The drive motor 96 drives the fan blade 3 97 to rotate through the rotating rod 95, drawing cold air from the outside into the rear cover 7 for heat dissipation. The outside air can be filtered and dehumidified by passing through filter screen 1 92, filter screen 2 93 and activated carbon particles 99, thereby drawing dry and clean cold air into the lower shell 1 for heat dissipation. At the same time, the rotating rod 95 drives the stirring rod 98 to stir the activated carbon particles 99 so that they can fully contact the air for filtration.

[0045] The working principle of the heat dissipation structure for the brushless excitation generator provided by this utility model is as follows:

[0046] When in use, the main shaft 2 rotates, driving the rotors of the main exciter 22 and the auxiliary exciter 23 to rotate, thereby generating electricity. This drives the fan blades 3 and 4 to rotate synchronously. During rotation, the cold air in the cooling chamber 101 is drawn into the front cover 6 through the first duct 61 and into the rear cover 7 through the second duct 71. Then, it flows through the auxiliary exciter 23 and the rectifier ring 21 to the main exciter 22. After passing through the main exciter 22, the hot air undergoes heat exchange and enters the cooling chamber 101 through the ventilation slot 102. When the hot air passes through the heat exchange plate 55 and the circulating water pipe 54, the circulating water pipe 54 continuously circulates the coolant cooled by the semiconductor refrigerator 521 in the water tank 52 through the circulating pump 53, thereby cooling the hot air into cold air and dissipating heat.

[0047] Furthermore, when the main shaft 2 rotates to generate electricity, the drive motor 96 is started synchronously. The drive motor 96 drives the fan blades 97 to rotate through the rotating rod 95, drawing cold air from the outside into the rear cover 7 for heat dissipation. The outside air can be filtered and dehumidified by passing through the filter screen 92, the filter screen 93 and the activated carbon particles 99, thereby drawing dry and clean cold air into the lower shell 1 for heat dissipation. At the same time, the rotating rod 95 drives the stirring rod 98 to stir the activated carbon particles 99 so that they can fully contact the air for filtration, thereby achieving efficient heat dissipation for the brushless excitation generator as a whole.

[0048] The circuits and controls involved in this utility model are all existing technologies, and will not be described in detail here.

[0049] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A heat dissipation structure for a brushless excitation generator, comprising: The lower housing (1) and the main shaft (2) rotatably mounted on the lower housing (1) are provided with a rectifier ring (21), a main exciter (22) and an auxiliary exciter (23) from left to right on the main shaft (2). A cooling cavity (101) is provided at the bottom end of the lower housing (1), and a ventilation slot (102) communicating with the cooling cavity (101) is provided inside the lower housing (1). Its characteristic is that it further includes: The first fan blade (3) is fixedly sleeved on the main shaft (2) and located between the rectifier ring (21) and the main exciter (22); The second fan blade (4) is fixedly sleeved on the main shaft (2) and located between the main exciter (22) and the auxiliary exciter (23); A water-cooled assembly (5) is embedded in the cooling cavity (101); The front end cover (6) is installed on the front end of the lower housing (1) by screws, and a conduit (61) communicating with the cooling chamber (101) is installed on the front end cover (6); The rear end cover (7) is installed at the rear end of the lower housing (1) by screws, and the rear end cover (7) is equipped with a second conduit (71) communicating with the cooling chamber (101). The rear end cover (7) and the front end cover (6) are connected by screws to an upper housing (8) that covers the lower housing (1). The rear end cover (7) is also fitted with an air-cooling component (9).

2. The brushless excitation generator heat dissipation structure according to claim 1, characterized by The wind direction of the first (3) and the second (4) wind blades are both towards the main exciter (22).

3. The brushless excitation generator heat dissipation structure according to claim 1, characterized by The water-cooling assembly (5) includes a sealing plate (51), a water tank (52), a circulating pump (53), a circulating water pipe (54), and heat exchange plates (55). The sealing plate (51) is installed at the bottom of the lower housing (1) by screws and seals the cooling chamber (101). The water tank (52) is fixedly installed at the bottom of the sealing plate (51). The water tank (52) is filled with coolant. Multiple semiconductor coolers (521) are embedded at the bottom of the water tank (52). A circulation pump (53) is fixedly installed on the outer wall of the water tank (52). The inlet end of the circulation pump (53) is connected to the water tank (52), and the outlet end of the circulation pump (53) is connected to a circulation water pipe (54). The circulation water pipe (54) is installed on the top of the sealing plate (51), and the end of the circulation water pipe (54) away from the circulation pump (53) is connected to the water tank (52). Several heat exchange plates (55) are evenly installed on the circulation water pipe (54).

4. The brushless excitation generator heat dissipation structure according to claim 3, characterized by The circulating water pipe (54) is in a continuously curved S-shape. The heat exchange plate (55) is composed of two opposing baffles that are snapped onto the S-shaped circulating water pipe (54), and both opposing baffles are provided with multiple ventilation holes.

5. The brushless excitation generator heat dissipation structure according to claim 1, characterized by A drive shaft (62) is rotatably mounted on the front end cover (6). One end of the drive shaft (62) is connected to the main shaft (2) via a coupling, and the other end of the drive shaft (62) is equipped with a pulley (63).

6. The brushless excitation generator heat sink structure according to claim 1, characterized by The outer side wall of the upper shell (8) is formed into continuous folds.

7. The brushless excitation generator heat sink structure according to claim 1, characterized by The air-cooled assembly (9) includes a ventilation pipe (91), which is embedded in the rear end plate of the rear end cover (7). The ventilation pipe (91) contains, from left to right, a filter screen one (92), a filter screen two (93), and a mounting plate (94). A rotating rod (95) is rotatably mounted on the mounting plate (94), and a drive motor (96) is used to drive the rotating rod (95) to rotate. A fan blade three (97) is fixedly sleeved on the rotating rod (95) between the filter screen two (93) and the mounting plate (94). The airflow direction of the fan blade three (97) is towards the rear end cover (7). A stirring rod (98) is fixedly sleeved on the rotating rod (95) between the filter screen two (93) and the filter screen one (92). Activated carbon particles (99) are filled in the ventilation pipe (91) between the filter screen two (93) and the filter screen one (92).

Images