Alternating-current generator with heat dissipation and air guide structure

Abstract

The utility model relates to the technical field of generators, and particularly discloses an alternating current generator with a heat dissipation and air guide structure. Comprising a generator rotating shaft which is rotationally sleeved with a front end shaft cover and a rear end shaft cover. The front end shaft cover and the rear end shaft cover are coaxially and fixedly connected, and the front end shaft cover and the rear end shaft cover are each provided with a first air outlet hole and an air inlet hole. A cover cap is fixedly arranged on the rear end shaft cover, and the interior of the cover cap is communicated with a first air outlet hole in the rear end shaft cover; the rectification assembly is fixedly installed in the cover cap, and a heat dissipation channel is arranged in the cover cap. The heat dissipation channel passes through the rectification assembly and the cover cap. The heat dissipation channel corresponds to the first air outlet hole in the rear end shaft cover and is communicated with the interior and the exterior of the cover cap. An air draft assembly is fixedly arranged on the cover cap, and the air draft assembly is connected with and matched with the heat dissipation channel and used for pushing air in the cover cap to flow along the heat dissipation channel. According to the utility model, the heat dissipation channel and the air exhaust assembly are arranged, so that hot air in the generator and cold air outside form cold and hot air exchange, and the heat dissipation effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field related to generators, and specifically discloses an AC generator with a heat dissipation and air guiding structure. Background Art

[0002] The car AC generator is the main power source of the car and is driven by the engine. When it works normally, it supplies power to all electrical devices except the starter. If there is excess energy, it will charge the battery.

[0003] Searching the prior art, the patent application with publication number CN214101039U discloses a new type of automobile AC generator with high efficiency exhaust. It includes a housing, a block, a stator core, a first fixing frame and a second fixing frame; housing: a through hole is provided in the middle of the right side, the left side of the housing is fitted with the right side of the housing cover, a mounting shell is provided in the middle of the left side of the housing cover, a power supply seat is installed at the front end of the outer side of the mounting shell, there are two blocks and they are respectively arranged at the upper and lower ends of the housing, the upper and lower ends of the outer side of the stator core are provided with a slot, the slot is connected with the block, the stator core is rotatably connected with a rotor, the first fixing frame is arranged at the bottom end of the outer side of the housing cover, and the second fixing frame is arranged at the bottom end of the outer side of the housing, wherein: it also includes a first exhaust port and a second exhaust port.

[0004] In this technical solution, heat is dissipated by setting a straight exhaust vent on the shell cover without any function of adjusting the wind direction. Since a large number of oil pipes and wiring harnesses are installed in the car engine compartment, when the generator is working, hot air is continuously output through the exhaust vents and blows toward the oil pipes and wiring harnesses, causing rapid aging of the oil pipes and wiring harnesses under high temperature, which can easily cause vehicle failure. Utility Model Content

[0005] The utility model aims to solve the problems mentioned in the above background technology and invents an AC generator with a heat dissipation and air guiding structure.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An AC generator with a heat dissipation and air guiding structure comprises a front-end shaft cover and a rear-end shaft cover, wherein a generator shaft is rotatably installed between the front-end shaft cover and the rear-end shaft cover, a rotor assembly is coaxially fixed on the generator shaft, a stator assembly is sleeved on the rotor assembly, and a stator assembly is fixedly arranged between the front-end shaft cover and the rear-end shaft cover, the rotor assembly comprises an upper claw pole and a lower claw pole, a first fan blade is fixedly arranged on the upper claw pole, and a second fan blade is fixedly arranged on the lower claw pole; both the front-end shaft cover and the rear-end shaft cover are provided with an air inlet hole; the rear-end shaft cover is provided with a first air outlet hole, and the air inlet holes on the front-end shaft cover and the rear-end shaft cover are both connected with the first air outlet hole; a cover cover is fixedly arranged on the rear-end shaft cover, and the interior of the cover cover is connected with the first air outlet hole; a guide groove is arranged in the cover cover; a guide pipe is fixedly connected to the cover cover, and the guide pipe is connected to both the guide groove and the pipeline.

[0008] Preferably, a rectifier assembly is installed in the cover, and the rectifier assembly includes a rectifier and a regulator. The rectifier is fixedly arranged in the cover, and the rectifier and the regulator are both electrically and fixedly connected; a plurality of second air outlet holes are provided on the rectifier, and the second air outlet holes correspond to the first air outlet holes.

[0009] Preferably, a plurality of heat sinks are fixedly disposed on the rectifier, and the plurality of heat sinks are evenly surrounded at the electrical connection between the rectifier and the generator shaft.

[0010] Preferably, the regulator faces the guide groove.

[0011] Preferably, the guide tube and the cover form a volute structure, and the direction of the volute structure matches the flow direction of the gas in the cover.

[0012] Preferably, the inner wall of the connecting point between the guide pipe and the guide groove is a smooth, convex and irregular curved surface, and the curved surface extends into the guide pipe.

[0013] Preferably, the guide pipe and the guide groove both protrude in a direction away from the rear end shaft cover of the cover and form a protrusion, and the protrusion and the cover together form a clearance groove.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] First, by setting up a guide pipe, the guide pipe connects the pipeline and changes the flow direction of the hot air flowing out of the guide pipe, preventing the hot air from directly blowing the oil pipe and wiring harness, ensuring the safety of the car and reducing the probability of car failure.

[0016] Second, a smooth and raised irregular curved surface is provided at the connection point between the guide tube and the guide groove. The cross section of the guide tube is suddenly reduced at the curved surface, which accelerates the gas flow rate while a large amount of gas flows along the surface of the protrusion, so that the gas is discharged more concentratedly, thereby improving the heat dissipation efficiency.

[0017] Third, the recess formed by the protrusion and the cover can reduce the installation space when installing the cover, preventing the cover from conflicting with the installation position of other parts in the engine compartment of the car. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0019] Figure 2 This is a schematic diagram of a rectifier assembly of the utility model;

[0020] Figure 3 It is a schematic diagram of the stator assembly and the rotor assembly of the utility model;

[0021] Figure 4 It is a schematic diagram of the internal structure of the utility model;

[0022] Figure 5 It is a partial structural schematic diagram of the utility model;

[0023] Figure 6 It is a schematic diagram of the claw pole structure of the utility model.

[0024] In the figure: 1. generator shaft; 2. guide tube; 3. stator; 4. front shaft cover; 5. rear shaft cover; 6. pulley; 7. upper claw pole; 8. lower claw pole; 9. first fan blade; 10. second fan blade; 11. rectifier; 12. cover; 13. curved surface; 14. second air outlet; 15. heat sink; 16. regulator; 17. first air outlet; 18. air inlet; 19. limit frame; 20. guide groove; 21. clearance groove. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-Figure 6 The utility model provides an embodiment: an AC generator with a heat dissipation and air guide structure, comprising a front shaft cover 4 and a rear shaft cover 5. The generator shaft 1 is coaxially rotatably installed between the front shaft cover 4 and the rear shaft cover 5. The generator shaft 1 passes through the front shaft cover 4 and the rear shaft cover 5, and the front shaft cover 4 and the rear shaft cover 5 are coaxially fixedly connected by a plurality of sets of matching bolts and nuts.

[0027] A pulley 6 is fixedly mounted on the portion of the generator shaft 1 that passes through the front end shaft cover 4, and the pulley 6 is connected to the power source through a belt.

[0028] The stator assembly is fixedly mounted between the front shaft cover 4 and the rear shaft cover 5. The stator assembly includes two annular limit frames 19, and the two limit frames 19 are coaxial with the generator shaft 1. The front shaft cover 4 is fixedly connected to one of the limit frames 19, and the rear shaft cover 5 is fixedly connected to the other limit frame 19. The stator 3 is installed between the two limit frames 19, and the two ends of the stator 3 correspond to the two limit frames 19 one by one, and the corresponding ends of the stator 3 are coaxially fixedly connected to the limit frames 19. The inner circumference of the stator 3 is rotatably sleeved with the rotor assembly, and the rotor assembly is coaxially fixedly mounted on the generator shaft 1.

[0029] The rotor assembly includes an upper claw pole 7 and a lower claw pole 8, which are coaxially fixed on the generator shaft 1, and the upper claw pole 7 and the lower claw pole 8 are closed and matched. The upper claw pole 7 corresponds to the front end shaft cover 4, and the lower claw pole 8 corresponds to the rear end shaft cover 5. The first blade 9 is evenly fixed on the upper edge of the end surface of the upper claw pole 7 away from the lower claw pole 8 in the circumferential direction. The second blade 10 is evenly fixed on the upper edge of the end surface of the lower claw pole 8 away from the upper claw pole 7 in the circumferential direction.

[0030] The end of the rear end shaft cover 5 away from the front end shaft cover 4 is coaxially fixedly connected to the cover 12. The cover 12 is equipped with a rectifier assembly.

[0031] The rectifier assembly includes a rectifier 11 and a regulator 16. The rectifier 11 is bolted into the cover 12. The rectifier 11 is used to convert AC to DC. The regulator 16 is screwed to the rectifier 11 and is electrically connected to the rectifier 11 for providing current to the rotor assembly. The rectifier 11 is both rotationally connected to the generator shaft 1 and electrically connected to the generator shaft 1. The rectifier 11 is also electrically connected to the stator 3 for current conversion. A plurality of heat sinks 15 are fixedly connected to the rectifier 11. The plurality of heat sinks 15 are used for heat dissipation of the rectifier 11. The plurality of heat sinks 15 are evenly surrounded at the electrical connection between the rectifier 11 and the generator shaft 1. A plurality of second air outlets 14 are provided on the rectifier 11 for circulating hot air.

[0032] A plurality of air inlet holes 18 are provided on the front shaft cover 4 and the rear shaft cover 5. The plurality of air inlet holes 18 on the front shaft cover 4 are all oriented toward the generator shaft 1 and are evenly distributed along the circumference of the front shaft cover 4. The first fan blade 9 is used to push the hot air generated by the heat of the stator assembly and the rotor assembly to flow toward the rear shaft cover 5. The first fan blade 9 also inhales the cold air outside the front shaft cover 4 through the plurality of air inlet holes 18 on the front shaft cover 4 and blows the cold air toward the stator assembly and the rotor assembly.

[0033] The multiple air inlet holes 18 on the rear end shaft cover 5 are all facing the generator shaft 1 and are evenly distributed along the circumference of the rear end shaft cover 5. The rear end shaft cover 5 also has multiple first air outlet holes 17, which are all opened in a direction parallel to the central axis of the generator shaft 1, and the first air outlet holes 17 correspond to the second air outlet holes 14. The multiple first air outlet holes 17 on the rear end shaft cover 5 are evenly distributed at the end of the rear end shaft cover 5 away from the front end shaft cover 4. The second fan blades 10 inhale the cold air outside the rear end shaft cover 5 through the multiple air inlet holes 18 on the rear end shaft cover 5, and the cold air is pushed toward the rectifier 11 and the regulator 16 by the second fan blades 10 through the multiple first air outlet holes 17 on the rear end shaft cover 5, so as to dissipate heat and cool down the rectifier 11 and the regulator 16. The second fan blades 10 are also used to push the hot air blown from the stator assembly and the rotor assembly, and the hot air flows to the multiple second air outlet holes 14 on the rectifier 11 through the multiple first air outlet holes 17 on the rear end shaft cover 5.

[0034] The cover 12 is fixedly equipped with a guide pipe 2 and a guide groove 20. The guide pipe 2 is fixedly connected with the cover 12 and forms a volute structure, which matches the airflow direction of the hot air in the cover 12 and is used to flow out the hot air in the cover 12. The hot air includes the hot air generated by the rectifier 11 and the regulator 16, and the hot air flowing from the multiple first air outlet holes 17 on the rear end shaft cover 5 to the multiple second air outlet holes 14 on the rectifier 11. All the hot air finally flows out of the cover 12 through the guide pipe 2.

[0035] The guide groove 20 is connected to the guide pipe 2 and the inside of the cover 12. The regulator 16 is directly opposite to the guide groove 20. The guide groove 20 is used to guide the hot air flowing from the regulator 16, so that the hot air generated by the heat of the regulator 16 flows directly to the guide pipe 2 through the guide groove 20, thereby improving the heat dissipation efficiency of the regulator 16. A clamping block is arranged on the outer circumference of the end of the guide pipe 2 away from the cover 12. Through the clamping block, the guide pipe 2 can be clamped and sealed to install the pipeline, thereby changing the flow direction of the hot air flowing out of the guide pipe 2, preventing the hot air from directly blowing the oil pipe and the wiring harness, ensuring the safety of the vehicle, and reducing the probability of vehicle failure.

[0036] The guide pipe 2, the guide groove 20, and the connection between the two all protrude in the direction of the cover 12 away from the rear end shaft cover 5 and form a protrusion. The end of the cover 12 away from the rear end shaft cover 5 and the protrusion together form a clearance groove 21, which can reduce the installation space when installing the cover 12 and prevent the cover 12 from conflicting with the installation position of other parts in the engine compartment of the automobile.

[0037] The inner wall of the connection between the guide pipe 2 and the guide groove 20 is provided with a smooth, convex and irregular curved surface 13, which extends along the direction of the connection into the guide pipe 2, and is used to change the flow direction and flow velocity of the gas.

[0038] Working principle:

[0039] Before using the alternator, the alternator is first fixed somewhere by bolts or other fixing methods, and then the pulley 6 is connected to the power source through a belt. Finally, the pipeline is fixedly connected to the guide pipe 2 and communicated.

[0040] When in use, the power source starts to work. The power source drives the pulley 6 to rotate, the pulley 6 drives the generator shaft 1 to rotate, and the generator shaft 1 drives the rotor assembly to rotate. At this time, the stator assembly cuts the magnetic flux lines generated by the rotor assembly to generate electricity. During the power generation process, due to mechanical friction and the thermal effect of current, both the rotor assembly and the stator assembly will generate a certain amount of heat.

[0041] The rotor assembly drives the first blade 9 and the second blade 10 to rotate synchronously. When the first blade 9 rotates, the first blade 9 pushes the hot air generated by the stator assembly and the rotor assembly to flow to the second blade 10. At the same time, under the rotation of the second blade 10, the second blade 10 pushes the hot air generated by the stator assembly and the rotor assembly to flow through the first air outlet 17 to the second air outlet 14 on the rectifier 11. After passing through the second air outlet 14, it flows through the guide pipe 2 to the connected pipeline and is discharged from the engine compartment of the car, thereby realizing the airflow guidance of the hot air generated by the stator assembly and the rotor assembly to prevent direct blowing of the oil pipe and the wiring harness.

[0042] At the same time, driven by the first blade 9 and the second blade 10, the heat generated by the rectifier 11 in the cover 12 is dissipated through the heat sink 15 to generate hot air, which flows through the guide pipe 2 to the connected pipe and is discharged from the engine compartment of the car, thereby achieving heat dissipation of the rectifier 11; the hot air generated by the regulator 16 is blown to the guide groove 20, then flows from the guide groove 20 to the guide pipe 2, and finally flows through the guide pipe 2 to the connected pipe and is discharged from the engine compartment of the car, thereby achieving heat dissipation of the regulator 16.

[0043] At the same time, due to the reduction of gas in the front shaft cover 4 and the rear shaft cover 5 and the push of the first blade 9 and the second blade 10, the cold air outside the front shaft cover 4 enters the front shaft cover 4 through the air inlet 18 on the front shaft cover 4, and is pushed by the first blade 9 to the rotor assembly and the stator assembly, thereby achieving the purpose of cooling and dissipating the rotor assembly and the stator assembly. The cold air outside the rear shaft cover 5 enters the rear shaft cover 5 through the air inlet 18 on the rear shaft cover 5, and then the cold air is pushed by the second blade 10 to the first air outlet 17, and the cold air is blown to the rectifier assembly through the first air outlet 17, thereby achieving the purpose of cooling and dissipating the rectifier 11 and the regulator 16.

[0044] When the hot air flows from the cover 12 to the guide tube 2 and flows out through the guide tube 2, since the curved surface 13 is provided at the connection between the cover 12 and the guide tube 2, and the curved surface extends all the way into the guide tube 2, the cross-sectional area of ​​the hot air flow first decreases from large and then increases from small, and the gas flow rate accelerates when the hot air flows through the curved surface 13. According to Bernoulli's formula, the gas pressure flowing through the curved surface 13 is low. At this time, the flow rate of the hot air in the cover 12 is slower than the flow rate of the hot air flowing through the curved surface 13, so the gas pressure in the cover 12 is high. As a result, a large amount of high-pressure gas in the cover 12 flows to the curved surface 13 at a low pressure, and the gas is discharged from the guide tube 2 through the curved surface 13, thereby increasing the heat dissipation efficiency.

[0045] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. An AC generator with a heat dissipation and air guide structure, comprising a front shaft cover (4) and a rear shaft cover (5), wherein a generator shaft (1) is rotatably mounted between the front shaft cover (4) and the rear shaft cover (5), a rotor assembly is coaxially fixed on the generator shaft (1), a stator assembly is sleeved on the rotor assembly, and the stator assembly is fixedly arranged between the front shaft cover (4) and the rear shaft cover (5), characterized in that: The rotor assembly comprises an upper claw pole (7) and a lower claw pole (8), wherein a first blade (9) is fixedly arranged on the upper claw pole (7), and a second blade (10) is fixedly arranged on the lower claw pole (8); an air inlet hole (18) is provided on the front end shaft cover (4) and the rear end shaft cover (5); a first air outlet hole (17) is provided on the rear end shaft cover (5), and the air inlet holes (18) on the front end shaft cover (4) and the rear end shaft cover (5) are both connected to the first air outlet hole (17); a cover (12) is fixedly arranged on the rear end shaft cover (5), and the interior of the cover (12) is connected to the first air outlet hole (17); a guide groove (20) is arranged inside the cover (12); and a guide pipe (2) is fixedly connected to the cover (12), and the guide pipe (2) is connected to both the guide groove (20) and the pipeline.

2. The AC generator with a heat dissipation and air guide structure according to claim 1, characterized in that: A rectifier assembly is installed in the cover (12), the rectifier assembly comprising a rectifier (11) and a regulator (16), the rectifier (11) is fixedly arranged in the cover (12), the rectifier (11) and the regulator (16) are both electrically connected and fixedly connected; a plurality of second air outlet holes (14) are provided on the rectifier (11), and the second air outlet holes (14) correspond to the first air outlet holes (17).

3. The AC generator with a heat dissipation and air guide structure according to claim 2, characterized in that: A plurality of heat sinks (15) are fixedly arranged on the rectifier (11), and the plurality of heat sinks (15) are evenly arranged around the electrical connection between the rectifier (11) and the generator shaft (1).

4. The AC generator with a heat dissipation and air guide structure according to claim 2, characterized in that: The regulator (16) faces the guide groove (20).

5. The AC generator with a heat dissipation and air guide structure according to claim 1, characterized in that: The flow guide tube (2) and the cover (12) form a volute structure, and the direction of the volute structure matches the flow direction of the gas in the cover (12).

6. The AC generator with a heat dissipation and air guide structure according to claim 1, characterized in that: The inner wall of the connecting point between the flow guide pipe (2) and the flow guide groove (20) is a smooth, convex and irregular curved surface (13), and the curved surface (13) extends into the flow guide pipe (2).

7. The AC generator with a heat dissipation and air guide structure according to claim 1, characterized in that: The guide tube (2) and the guide groove (20) both protrude in a direction away from the rear end shaft cover (5) from the cover (12) to form a protruding portion, and the protruding portion and the cover (12) together form a clearance groove (21).

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