High-power alternating-current generator

Abstract

The invention relates to the field of automobile alternating-current generators, and discloses a high-power alternating-current generator which comprises a machine shell, a rear end cover arranged behind the machine shell and a built-in machine shaft. A heat dissipation hole is formed in the rear end cover, a rotating block with a first fan blade is arranged in the hole, and the rotating block is rotationally installed on a supporting frame fixed to the rear end cover; a connecting groove is formed in the transmission shaft, the main shaft is inserted into the groove and is in transmission connection with the groove, and two ends of memory alloy in the groove are fixedly connected with the main shaft and the transmission shaft; the rotating block and the transmission shaft are in clutch transmission through the second butt joint assembly. A sliding sleeve with a second fan blade is arranged between the first fan blade and the second fan blade, is provided with a through hole and is in clutch transmission with the transmission shaft through a first butt-joint assembly; the sliding sleeve is provided with a groove, the rotating block is rotatably provided with a connecting rotating ring, the connecting rotating ring is fixedly connected with a supporting rod, and the supporting rod is inserted into the inserting groove. A mechanism for driving the transmission shaft to move is arranged between the transmission shaft and the sliding sleeve. After the temperature in the alternating-current generator rises, the transmission shaft drives the rotating block and the first fan blade through the second butt joint assembly, the two fan blades are stacked for heat dissipation, and the high-temperature requirement is met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile alternator, in particular to a high-power alternator. BACKGROUND

[0002] The automobile alternator technology is the core of the automobile power supply system, and its essence is to convert the mechanical energy of the engine into electrical energy to power the on-board electrical equipment and charge the battery.

[0003] The motor end cover with good heat dissipation performance disclosed in the patent CN118611315A includes two groups of symmetrical connection mechanisms, the connection mechanism includes an arc-shaped plate arranged in the cavity, the outer arc surface of the arc-shaped plate is fixedly installed with a round rod, the distal end of the round rod is movably connected with an extension head, the inner arc surface of the arc-shaped plate is fixedly installed with a capsule, the surface of the capsule is fixedly installed with a support plate, the surface of the support plate is fixedly installed with a limiting rod, the distal end of the limiting rod is fixedly installed with a bonding plate, and the inner portion of the bonding plate is fixedly installed with a magnetic block.

[0004] Based on the above technical features, the technical problem is that in the prior art, the end cover is mostly cooled by a fan blade, and the air cooling capacity is fixed and cannot meet the air cooling of the alternator under high temperature working conditions.

[0005] Therefore, it is necessary to solve the above problems by using a high-power alternator. SUMMARY

[0006] The present application aims to provide a high-power alternator to solve the problems in the background art.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a high-power alternator, comprising a casing, a rear end cover is installed on the casing, and a main shaft of the generator is rotatably installed in the casing;

[0008] A heat dissipation hole is formed in the rear end of the rear end cover, a rotating block is arranged in the heat dissipation hole, and a plurality of first fan blades are installed on the rotating block; a support frame is fixedly arranged at the rear end of the rear end cover, and the rotating block is rotatably installed on the support frame;

[0009] A transmission shaft is coaxially arranged at the rear end of the main shaft, a connecting groove is formed in the front end of the transmission shaft along the axial direction, the rear end of the main shaft is inserted into the connecting groove and is in transmission connection with the transmission shaft; a memory alloy is arranged in the connecting groove; one end of the memory alloy is fixedly connected with the main shaft, and the other end is fixedly connected with the transmission shaft;

[0010] The front end of the rotating block and the rear end of the transmission shaft are in clutch type transmission cooperation through a second butt joint assembly; a sliding sleeve is arranged between the rotating block and the transmission shaft, and a plurality of second fan blades are installed on the sliding sleeve.

[0011] The sliding sleeve is provided with a through hole along the axial direction of the transmission shaft for the transmission shaft to pass through; the sliding sleeve and the transmission shaft are in clutch type transmission cooperation through a first joint assembly;

[0012] The rear end of the sliding sleeve is provided with a plurality of insertion grooves along the axial direction of the transmission shaft, and the insertion grooves are uniformly distributed along the circumferential direction of the transmission shaft; the front end of the rotating block is rotatably connected to a connecting ring, the front end of the connecting ring is fixedly provided with a plurality of supporting rods, and the plurality of supporting rods correspond to the plurality of insertion grooves one by one; each transmission rod is inserted into the corresponding insertion groove and is in limiting sliding cooperation with the corresponding insertion groove;

[0013] The rear end of the transmission shaft and the sliding sleeve are provided with a driving mechanism for driving the sliding sleeve to slide close to or away from the rotating block.

[0014] Preferably, the second joint assembly comprises a second spline and a second key groove; the second spline is fixed to the front end of the rotating block, and the second key groove is provided in the rear end of the transmission shaft; the second spline and the second key groove are in clutch type transmission cooperation.

[0015] Preferably, the first joint assembly comprises a first spline and a first key groove; the first spline is composed of a plurality of protrusions fixed on the transmission shaft, and the plurality of protrusions are uniformly distributed along the circumferential direction of the transmission shaft; the first key groove is composed of a plurality of recesses provided on the inner wall of the sliding sleeve, and the plurality of recesses correspond to the plurality of protrusions one by one; each protrusion is in clutch type transmission cooperation with the corresponding recess.

[0016] Preferably, the driving mechanism comprises a plurality of gears; the plurality of gears correspond to the plurality of supporting rods one by one, and each gear is rotatably installed on the corresponding supporting rod; each insertion groove where the supporting rod is located is fixedly provided with a rack parallel to the transmission shaft, and each rack is in meshing cooperation with the gear in the insertion groove; the inner wall of the sliding sleeve is provided with a plurality of notches along the axial direction of the transmission shaft, and the plurality of notches correspond to the plurality of insertion grooves one by one; each notch is in communication with the corresponding insertion groove, and each gear is slidably inserted into the notch communicated with the insertion groove; the rear end of the transmission shaft is provided with a gear slot in meshing cooperation with the plurality of gears.

[0017] Preferably, the transmission shaft is provided with a clamping groove along the axial direction, and a clamping block is limitingly and slidably installed in the clamping groove; the clamping block is fixed to the inner wall of the connecting groove in the transmission shaft.

[0018] Preferably, the plurality of first vanes and the plurality of second vanes are distributed along the circumference of the main shaft, each first vane is rotatably installed on the rotating block, and each second vane is rotatably installed on the sliding sleeve; two adjacent first vanes correspond to one second vane; the rotating block is provided with a first annular groove with a front opening at the front end, and a first transmission mechanism for driving all the first vanes to rotate is installed in the first annular groove; the sliding sleeve is provided with a second annular groove with a rear opening at the rear end, and a second transmission mechanism for driving all the second vanes to rotate is installed in the second annular groove.

[0019] Preferably, the first transmission mechanism comprises a first sliding ring and a first annular magnet; the first sliding ring and the first annular magnet are coaxially and slidably installed in the first annular groove, the first annular magnet is located between the first sliding ring and the sliding sleeve, a plurality of first connecting blocks are fixedly arranged between the first sliding ring and the first annular magnet, the plurality of first connecting blocks are distributed along the circumference of the first sliding ring; a plurality of first fixed blocks are arranged in the first annular groove, the plurality of first fixed blocks are distributed along the circumference of the main shaft and are fixedly connected with the rotating block; each first fixed block is located between the first sliding ring and the first annular magnet, and a first spring is fixedly arranged between each first fixed block and the first sliding ring; a plurality of first fixed plates are fixedly arranged on the end face of the first sliding ring close to the first annular magnet, and a first push shaft is fixedly arranged on each first fixed plate along the radial direction of the main shaft; a first rotating shaft is fixedly arranged on each first vane, each first rotating shaft penetrates into the first annular groove along the radial direction of the main shaft and is rotatably connected with the rotating block; a first transmission plate with a first waist-shaped hole is fixedly arranged on each first rotating shaft, the plurality of first transmission plates correspond to the plurality of first push shafts one by one, each first push shaft penetrates into the first waist-shaped hole of the corresponding first transmission plate and abuts against the corresponding first transmission plate in transmission cooperation.

[0020] Preferably, the second transmission mechanism comprises a second sliding ring and a second annular magnet; the second sliding ring and the second annular magnet are coaxially and slidingly installed in the second ring groove, the second annular magnet is located between the second sliding ring and the sliding sleeve, a plurality of second connecting blocks are fixedly arranged between the second sliding ring and the second annular magnet; the plurality of second connecting blocks are uniformly distributed along the circumference of the second sliding ring; a plurality of second fixed blocks are arranged in the second ring groove, the plurality of second fixed blocks are uniformly distributed along the circumference of the main shaft and are fixedly connected with the sliding sleeve; each second fixed block is located between the second sliding ring and the second annular magnet, and a second spring is fixedly arranged between each second fixed block and the second sliding ring; a plurality of second fixed plates are fixedly arranged on the end face of the second sliding ring close to the second annular magnet, and a second push shaft is fixedly arranged on each second fixed plate along the radial direction of the main shaft; a second rotating shaft is fixedly arranged on each second fan blade, each second rotating shaft penetrates into the second ring groove along the radial direction of the main shaft and is rotationally connected with the sliding sleeve; a second transmission plate with a second waist-shaped hole is fixedly arranged on each second rotating shaft, the plurality of second transmission plates correspond to the plurality of second push shafts one-to-one, and each second push shaft penetrates into the second waist-shaped hole of the corresponding second transmission plate and abuts against the corresponding second transmission plate in transmission cooperation.

[0021] Preferably, the first annular magnet and the second annular magnet are magnetically repelled; a plurality of first limiting rods are fixedly arranged on the end of the first sliding ring close to the first annular magnet, the plurality of first limiting rods correspond to the plurality of first fixed blocks one-to-one, and each first limiting rod faces the corresponding first fixed block along the axial direction of the main shaft; a plurality of second limiting rods are fixedly arranged on the end of the second sliding ring close to the second annular magnet, the plurality of second limiting rods correspond to the plurality of second fixed blocks one-to-one, and each second limiting rod faces the corresponding second fixed block along the axial direction of the main shaft.

[0022] Preferably, the front end of the rotating block is fixedly provided with a transmission ring, and the transmission ring is coaxial with the main shaft; a wave-shaped ring groove is formed in the front end of the transmission ring, and a ring-shaped recessed groove is formed in the rear end of the sliding sleeve along the axial direction of the main shaft, the ring-shaped recessed groove is matched with the transmission ring and is used for plug-in connection of the transmission ring, and the groove bottom of the ring-shaped recessed groove is matched with the front end of the transmission ring and is used for abutting transmission cooperation with the transmission ring.

[0023] Technical effects and advantages of the present application:

[0024] First, the first fan blade is arranged on the rotating block, the second fan blade is arranged on the sliding sleeve, and the characteristics of the memory alloy are matched. When the temperature inside the automobile engine is not high and the heat dissipation demand is not large, the transmission shaft and the sliding sleeve are synchronously rotated through the first connecting assembly, the sliding sleeve drives the second fan blade to perform air cooling heat dissipation; when the temperature inside the automobile engine continues to rise, the transmission shaft and the rotating block are connected and driven through the second connecting assembly, so that the rotating block rotates, and the rotating block drives the first fan blade to rotate and then air cooling heat dissipation is performed; the air cooling fan blades are stacked twice, so that the air cooling heat dissipation capacity is improved, and then the air cooling heat dissipation of the alternator under high-temperature working conditions is met.

[0025] Second, the first fan blade and the second fan blade can rotate, the first fan blade and the second fan blade jointly block the heat dissipation hole when heat dissipation is not performed; when heat dissipation is performed, the first fan blade is driven to rotate through the first transmission mechanism, and the second fan blade is driven to rotate through the second transmission mechanism, so that the heat dissipation hole is opened to perform heat dissipation; when the alternator does not work, the heat dissipation hole is closed to adapt to the parking working condition. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a three-dimensional structure schematic diagram of the application;

[0027] Figure 2 It is a rear end cover assembly schematic diagram of the application;

[0028] Figure 3 It is a rear end cover internal schematic diagram of the application;

[0029] Figure 4 It is a first fan blade and a second fan blade three-dimensional schematic diagram of the application;

[0030] Figure 5 It is a rotating block and a sliding sleeve internal schematic diagram of the application;

[0031] Figure 6 It is an enlarged schematic diagram of A of the application; Figure 5

[0032] Figure 7 It is a rotating block front end schematic diagram of the application;

[0033] Figure 8 It is a connecting rotating ring schematic diagram of the application;

[0034] Figure 9 It is a transmission shaft schematic diagram of the application;

[0035] Figure 10 It is a transmission ring schematic diagram of the application;

[0036] Figure 11 It is a first transmission mechanism schematic diagram of the application;

[0037] ​Figure 12 Figure is a schematic diagram of the first transmission plate of the present application;

[0038] Figure 13 Figure is a schematic diagram of the first spring of the present application;

[0039] Figure 14 Figure is a schematic diagram of the sliding sleeve of the present application;

[0040] Figure 15 Figure is a schematic diagram of the second transmission mechanism of the present application.

[0041] In the figure: 1, the casing; 2, the rear end cover; 3, the main shaft; 4, the support frame; 5, the first fan blade; 6, the second fan blade; 7, the rotating block; 8, the sliding sleeve; 9, the transmission shaft; 10, the memory alloy; 11, the gear; 12, the rack; 13, the first transmission plate; 14, the first annular magnet; 15, the second annular magnet; 16, the connecting rotating ring; 17, the first sliding ring; 18, the transmission ring; 19, the gear slot; 20, the protruding block; 21, the first fixed block; 22, the first spring; 23, the first fixed plate; 24, the first waist-shaped hole; 25, the first limiting rod; 26, the annular sink; 27, the groove; 28, the insertion slot; 29, the second sliding ring; 30, the second spring; 31, the second limiting rod; 32, the second fixed block; 33, the second spline; 34, the second key slot; 35, the second fixed plate; 36, the second waist-shaped hole; 37, the second transmission plate. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0043] The present application provides a high-power alternator as shown in Figures 1 to 15 The present application provides a high-power alternator as shown in

[0044] The rear end of the rear end cover 2 is provided with a heat dissipation hole, which is a circular hole coaxial with the main shaft 3. A rotating block 7 is arranged in the heat dissipation hole, and the rotating block 7 is rotatably installed on a support frame 4 fixedly connected with the rear end of the rear end cover 2.

[0045] The rear end of the rotating block 7 is fixedly provided with a support shaft coaxial with the main shaft 3. The support shaft penetrates the support frame 4 and is rotatably connected with the support frame 4. A plurality of first fan blades 5 are rotatably installed on the rotating block 7 along the circumferential direction of the main shaft 3.

[0046] Each first fan blade 5 is a fan-shaped blade matched with the heat dissipation hole.

[0047] The rear end of the main shaft 3 is coaxially provided with a transmission shaft 9, and the front end of the transmission shaft 9 is axially provided with a connecting groove.

[0048] Specifically, an axial clamping groove is formed on the circumferential surface of the rear end of the main shaft 3, and a clamping block is slidingly installed in the clamping groove. The clamping block is fixed to the inner wall of the connecting groove in the transmission shaft 9.

[0049] A memory alloy 10 is arranged in the connecting groove, one end of the memory alloy 10 is fixedly connected with the transmission shaft 9, and the other end is fixedly connected with the main shaft 3. The memory alloy 10 is a multi-path memory alloy.

[0050] The front end of the rotating block 7 is in clutch type transmission cooperation with the rear end of the transmission shaft 9 through a second docking assembly.

[0051] Specifically, the second docking assembly includes a second spline 33 and a second key groove 34. The second spline 33 is fixed to the front end of the rotating block 7 and coaxially faces the transmission shaft 9. The second key groove 34 is formed on the rear end of the transmission shaft 9 along the axial direction of the transmission shaft 9. The second spline 33 and the second key groove 34 are in clutch type transmission cooperation, that is, when the second spline 33 is inserted into the second key groove 34, the second spline 33 rotates synchronously with the transmission shaft 9.

[0052] A sliding sleeve 8 is arranged between the rotating block 7 and the transmission shaft 9, a through hole is formed in the sliding sleeve 8 along the axial direction of the transmission shaft 9, and the through hole is a circular hole for the transmission shaft 9 to pass through.

[0053] A plurality of second fan blades 6 are rotatably installed on the outer wall of the sliding sleeve 8, and the plurality of second fan blades 6 are uniformly distributed along the circumferential direction of the main shaft 3. Each second fan blade 6 is a fan-shaped blade matched with the heat dissipation hole.

[0054] Corresponding to one second fan blade 6, two adjacent first fan blades 5 are arranged. In the initial state, the first fan blade 5 and the second fan blade 6 block the heat dissipation hole.

[0055] A plurality of insertion grooves 28 are formed on the rear end of the sliding sleeve 8 along the axial direction of the transmission shaft 9, and the plurality of insertion grooves 28 are uniformly distributed along the circumferential direction of the transmission shaft 9. A connecting ring 16 is rotatably installed on the front end of the rotating block 7, and a plurality of supporting rods are fixedly arranged on the front end of the connecting ring 16. The plurality of supporting rods correspond to the plurality of insertion grooves 28 one by one. Each transmission rod is inserted into the corresponding insertion groove 28 and is in limiting sliding cooperation with the corresponding insertion groove 28.

[0056] The rear end of the connecting ring 16 is a T-shaped ring block, a rotating groove is formed on the front end of the rotating block 7 along the circumferential direction of the main shaft 3, and the rotating groove is matched with the T-shaped ring block. The T-shaped ring block of the connecting ring 16 is limitingly and rotatably installed in the rotating groove.

[0057] The sliding sleeve 8 and the transmission shaft 9 are in clutch transmission through a first docking assembly.

[0058] Specifically, the first docking assembly comprises a first spline and a first key groove. The first spline is composed of a plurality of protrusions 20 fixed on the transmission shaft 9, and the plurality of protrusions 20 are uniformly distributed along the circumference of the transmission shaft 9. Each protrusion 20 is a long rectangular block, and each protrusion 20 is arranged along the axial direction of the transmission shaft 9. The first key groove is composed of a plurality of grooves 27 formed on the inner wall of the sliding sleeve 8. The plurality of grooves 27 correspond to the plurality of protrusions 20 one by one and match each other. Each groove 27 is in communication with the perforation in the sliding sleeve 8, and each groove 27 is formed along the axial direction of the main shaft 3. Each protrusion 20 is in clutch transmission with the corresponding groove 27, that is, after the protrusion 20 slides into the corresponding groove 27, the sliding sleeve 8 and the transmission shaft 9 rotate synchronously.

[0059] The cross-sectional outline of the rotating block 7 and the sliding sleeve 8 is a polygon, and the number of sides of the polygon matches the number of the first and second fan leaves 5 and 6.

[0060] The rear end of the transmission shaft 9 and the sliding sleeve 8 are provided with a driving mechanism, and the driving mechanism is used to drive the sliding sleeve 8 to slide close to or away from the rotating block 7.

[0061] Specifically, the driving mechanism comprises a plurality of gears 11. The plurality of gears 11 correspond to the plurality of support rods one by one. The front end of each support rod is provided with a notch slot along the radial direction of the main shaft 3, and each gear 11 penetrates the notch slot of the corresponding support rod and is rotatably connected with the corresponding support rod.

[0062] Each support rod is provided with an axis body transversely arranged in the notch slot, each axis body is fixedly connected with the support rod, and each gear 11 is rotatably arranged on the axis body of the corresponding notch slot. A torsional spring is arranged on each axis body, one end of each torsional spring is fixedly connected with the gear 11 on the axis body, and the other end of each torsional spring is fixedly connected with the support rod connected with the axis body. In the initial state, the rotating block 7 and the sliding sleeve 8 abut.

[0063] Each support rod is provided with a rack 12 fixedly arranged in the slot 28, and each rack 12 is in meshing engagement with the gear 11 in the slot 28.

[0064] A plurality of notches are formed on the inner wall of the sliding sleeve 8 along the axial direction of the transmission shaft 9, and the plurality of notches correspond to the plurality of slots 28 one by one. Each notch is in communication with the corresponding slot 28, and each gear 11 slides through the notch communicated with the slot 28. The rear end of the transmission shaft 9 is provided with a gear slot 19 composed of a plurality of annular grooves arranged along the circumference of the transmission shaft 9, and the gear slot 19 is used to mesh with the plurality of gears 11.

[0065] A first annular groove is formed in the front end of the rotating block 7 along the circumference of the main shaft 3, the groove opening of the first annular groove faces forward, a first transmission mechanism is installed in the first annular groove, and the first transmission mechanism is used to drive all the first vanes 5 to rotate.

[0066] A second annular groove is formed in the rear end of the sliding sleeve 8 along the circumference of the main shaft 3, the groove opening of the second annular groove faces backward, a second transmission mechanism is installed in the second annular groove, and the second transmission mechanism is used to drive all the second vanes 6 to rotate.

[0067] The first transmission mechanism and the second mechanism interact with each other and drive each other.

[0068] Specifically, the first transmission mechanism includes a first sliding ring 17 and a first annular magnet 14. The first sliding ring 17 and the first annular magnet 14 are both coaxially and slidingly installed in the first annular groove and are matched with the first annular groove, the first annular magnet 14 is located between the first sliding ring 17 and the sliding sleeve 8, a plurality of first connecting blocks are arranged between the first sliding ring 17 and the first annular magnet 14, the plurality of first connecting blocks are uniformly distributed along the circumference of the first sliding ring 17, and each first connecting block is fixedly connected with the first sliding ring 17 and the first annular magnet 14.

[0069] A plurality of first fixed blocks 21 are arranged in the first annular groove, the plurality of first fixed blocks 21 are uniformly distributed along the circumference of the main shaft 3 and are fixedly connected with the rotating block 7. Each first fixed block 21 is located between the first sliding ring 17 and the first annular magnet 14, and a first spring 22 and a first limiting rod 25 are arranged between each first fixed block 21 and the first sliding ring 17.

[0070] Each first limiting rod 25 is fixedly connected with the first sliding ring 17 and faces the corresponding first fixed block 21 along the axial direction of the main shaft 3. Each first spring 22 is sleeved on the first limiting rod 25 between the first fixed block 21 and the first sliding ring 17. One end of each first spring 22 is fixedly connected with the first sliding ring 17, and the other end of each first spring 22 is fixedly connected with the corresponding first fixed block 21.

[0071] Each first limiting rod 25 is used for sliding limiting of the first sliding ring 17.

[0072] The first sliding ring 17 is fixed with a plurality of first fixed plates 23 on the end face of the first annular magnet 14. Each first fixed plate 23 is fixed with a first push shaft along the radial direction of the main shaft 3. Each first fan blade 5 is fixed with a first rotating shaft. Each first rotating shaft penetrates into the first annular groove along the radial direction of the main shaft 3 and is rotationally connected with the rotating block 7. Each first rotating shaft is fixed with a first transmission plate 13 with a first waist-shaped hole 24. Each first transmission plate 13 is perpendicular to the first rotating shaft. The plurality of first transmission plates 13 correspond to the plurality of first push shafts. Each first push shaft penetrates into the first waist-shaped hole 24 of the corresponding first transmission plate 13 and abuts against the corresponding first transmission plate 13 for transmission.

[0073] To ensure the stability of the first sliding ring 17, a plurality of first limiting blocks are fixed on the outer wall of the first sliding ring 17. The plurality of first limiting blocks are uniformly distributed along the circumferential direction of the first sliding ring 17. A plurality of first guide grooves are formed on the inner wall of the first annular groove along the axial direction of the main shaft 3. The plurality of first guide grooves correspond to the plurality of first limiting blocks. Each first limiting block is located in the corresponding first guide groove and is in limiting sliding cooperation with the first guide groove.

[0074] Specifically, the second transmission mechanism includes a second sliding ring 29 and a second annular magnet 15. The second sliding ring 29 and the second annular magnet 15 are coaxially and slidingly installed in the second annular groove and are matched with the second annular groove. The second annular magnet 15 is located between the second sliding ring 29 and the rotating block 7. A plurality of second connecting blocks are arranged between the second sliding ring 29 and the second annular magnet 15. The plurality of second connecting blocks are uniformly distributed along the circumferential direction of the second sliding ring 29. Each second connecting block is fixedly connected with the second sliding ring 29 and the second annular magnet 15.

[0075] A plurality of second fixed blocks 32 are arranged in the second annular groove. The plurality of second fixed blocks 32 are uniformly distributed along the circumferential direction of the main shaft 3 and are fixedly connected with the sliding sleeve 8. Each second fixed block 32 is located between the second sliding ring 29 and the second annular magnet 15. A second spring 30 and a second limiting rod 31 are arranged between each second fixed block 32 and the second sliding ring 29.

[0076] Each second limiting rod 31 is fixedly connected with the second sliding ring 29 and faces the corresponding second fixed block 32 along the axial direction of the main shaft 3. Each second spring 30 is sleeved on the second limiting rod 31 between the second fixed block 32 and the second sliding ring 29. One end of each second spring 30 is fixedly connected with the second sliding ring 29. The other end of each second spring 30 is fixedly connected with the corresponding second fixed block 32.

[0077] Each second limiting rod 31 is used for limiting the sliding of the second sliding ring 29.

[0078] A plurality of second fixed plates 35 are fixedly arranged on the end face of the second annular magnet 15 close to the second sliding ring 29. Each second fixed plate 35 is fixedly arranged with a second push shaft along the radial direction of the main shaft 3. Each second fan blade 6 is fixedly arranged with a second rotating shaft. Each second rotating shaft penetrates into the second annular groove along the radial direction of the main shaft 3 and is rotationally connected with the sliding sleeve 8. Each second rotating shaft is fixedly arranged with a second transmission plate 37 with a second waist-shaped hole 36. Each second transmission plate 37 is perpendicular to the second rotating shaft. The plurality of second transmission plates 37 correspond to the plurality of second push shafts one by one. Each second push shaft penetrates into the second waist-shaped hole 36 of the corresponding second transmission plate 37 and abuts against the corresponding second transmission plate 37 for transmission.

[0079] To ensure the stability of the second sliding ring 29, a plurality of second limiting blocks can be fixedly arranged on the outer wall of the second sliding ring 29. The plurality of second limiting blocks are uniformly distributed along the circumferential direction of the second sliding ring 29. A plurality of second guide grooves are formed on the inner wall of the second annular groove along the axial direction of the main shaft 3. The plurality of second guide grooves correspond to the plurality of second limiting blocks one by one. Each second limiting block is located in the corresponding second guide groove and limits the sliding cooperation with the second guide groove.

[0080] To ensure the stability of the first fan blade 5 and the second fan blade 6 during rotation, a first annular metal plate capable of being magnetically attracted to the first annular magnet 14 can be fixedly arranged at the slot opening of the first annular groove. A second annular metal plate capable of being magnetically attracted to the second annular magnet 15 can be fixedly arranged at the slot opening of the second annular groove. The first annular metal plate and the second annular metal plate are located between the first annular magnet 14 and the second annular magnet 15.

[0081] In the initial state, the magnetic repulsion force between the first annular magnet 14 and the second annular magnet 15 is smaller than the elastic force of all the torsion springs.

[0082] The front end of the rotating block 7 is fixedly arranged with a transmission ring 18 coaxial with the main shaft 3. The front end of the transmission ring 18 is provided with a wave-shaped annular groove. The rear end of the sliding sleeve 8 is provided with an annular sunken groove 26 along the axial direction of the main shaft 3. The annular sunken groove 26 matches the transmission ring 18 and is used for plug-in connection of the transmission ring 18. The groove bottom of the annular sunken groove 26 matches the front end of the transmission ring 18 and is used for abutting transmission cooperation with the transmission ring 18. When the transmission ring 18 is inserted into the annular sunken groove 26 and contacts the groove bottom of the annular sunken groove 26, the transmission ring 18 is pushed to rotate by a certain angle, thereby making the first fan blade 5 and the second fan blade 6 in the initial state of misalignment.

[0083] Working principle: the automobile alternator will generate heat in the process of energy conversion. When the automobile alternator is not started, the temperature in the casing 1 is low, and the memory alloy 10 is in the initial contraction state; the rear end of the main shaft 3 is limited by the limiting cooperation of the clamping groove and the clamping block, and is coaxial with the transmission shaft 9 without relative rotation; the first fan blade 5 and the second fan blade 6 jointly block the heat dissipation holes on the rear end cover 2 to prevent external dust and impurities from entering the casing 1.

[0084] At the same time, the rotating block 7 is temporarily not rotated by being rotatably installed on the support frame 4 through the support shaft; the sliding sleeve 8 is sleeved on the transmission shaft 9 through the perforated sleeve, at this time the protruding block 20 is not inserted into the corresponding recess 27, and the second spline 33 is not inserted into the second key groove 34; the rotating block 7 and the sliding sleeve 8 abut, the first spring 22 and the second spring 30 are both in the stretched state, the first sliding ring 17 and the second sliding ring 29 do not axially slide, and the first push shaft and the second push shaft do not generate the pushing force to the first transmission plate 13 and the second transmission plate 37.

[0085] In the low-load power generation stage, i.e. low temperature / mild power supply, the power generation transmission is started, and after the engine is started, the main shaft 3 is rotated by the belt pulley, and the main shaft 3 drives the transmission shaft 9 to rotate by the transmission cooperation of the clamping groove and the clamping block. With the continuous power generation, the temperature inside the automobile alternator rises, and the temperature is transmitted to the memory alloy 10 through the transmission shaft 9 and the main shaft 3; when the first deformation temperature of the memory alloy 10 is reached, the memory alloy 10 is first stretched and pushes the transmission shaft 9 into the perforation in the sliding sleeve 8. At this time, the protruding block 20 on the transmission shaft 9 gradually slides into the recess 27 of the sliding sleeve 8, and the sliding sleeve 8 rotates synchronously with the transmission shaft 9 and drives the second fan blade 6 to revolve around the transmission shaft 9 through the second rotating shaft.

[0086] The sliding sleeve 8 is preliminarily cooled in the process of rotation. In the process of the transmission shaft 9 penetrating into the perforation of the sliding sleeve 8, the gear 11 meshes with the gear slot 19 to drive, and at the same time, the gear 11 rotates to drive the sliding sleeve 8 to slide in the axial direction away from the rotating block 7 due to the meshing of the gear 11 and the corresponding rack 12; the wave-shaped ring groove of the transmission ring 18 is separated from the bottom of the annular sunken groove 26.

[0087] In the process of the sliding sleeve 8 moving away from the rotating block 7, all the torsional springs are reversely twisted, the first annular magnet 14 and the second annular magnet 15 move away from each other, and the magnetic repulsion gradually weakens. When the magnetic repulsion is smaller than the elastic force of the first spring 22 and the elastic force of the second spring 30, the first sliding ring 17 slides to the first fixed block 21 under the action of the pulling force of the first spring 22 until the first limiting rod 25 abuts against the corresponding first fixed block 21; the second sliding ring 29 slides to the second fixed block 32 under the action of the pulling force of the second spring 30 until the second limiting rod 31 abuts against the corresponding second fixed block 32.

[0088] In the process of sliding the first sliding ring 17 close to the first fixed block 21, the first fixed plate 23 is driven, the first fixed plate 23 drives the first push shaft, the first push shaft pushes the first transmission plate 13 through the first waist-shaped hole 24, the first transmission plate 13 drives the first rotating shaft, and the first rotating shaft drives the first fan blade 5 to rotate by a certain angle. At the same time, the first annular magnet 14 gradually approaches the first annular metal plate and finally magnetically contacts the first annular metal plate.

[0089] Similarly, in the process of sliding the second sliding ring 29 close to the second fixed block 32, the second fixed plate 35 is driven, the second fixed plate 35 drives the second push shaft, the second push shaft pushes the second transmission plate 37 through the second waist-shaped hole 36, the second transmission plate 37 drives the second rotating shaft, and the second rotating shaft drives the second fan blade 6 to rotate by a certain angle. At the same time, the second annular magnet 15 gradually approaches the second annular metal plate and finally magnetically contacts the second annular metal plate.

[0090] It should be pointed out that the deflection directions of the first fan blade 5 and the second fan blade 6 are the same.

[0091] At this time, only the sliding sleeve 8 drives the second fan blade 6 to generate air flow, which carries away a small amount of heat in the casing 1 through the heat dissipation hole, meeting the low-load heat dissipation requirement. In this process, the sliding sleeve 8 drives the support rod to revolve around the transmission shaft 9 through the insertion slot 28, the support rod drives the connecting rotating ring 16 to rotate, and the rotating block 7 does not rotate.

[0092] In the high-load power generation stage, i.e. in a high-temperature environment / severe power supply, the temperature of the memory alloy 10 is further increased, and when the second deformation temperature of the memory alloy 10 is reached, the memory alloy 10 is stretched for the second time. At this time, the transmission shaft 9 penetrates the sliding sleeve 8, the second key groove 34 at the rear end of the transmission shaft 9 gradually approaches and finally interfaces with the second spline 33 of the rotating block 7, and the rotating block 7 starts to rotate synchronously with the transmission shaft 9. In this process, the sliding sleeve 8 continues to move forward by a distance and approaches the main heat generating components such as the rectifier. At the same time, the first fan blade 5 and the second fan blade 6 reach a suitable vertical distance; the rotating block 7 drives the first fan blade 5 to revolve around the transmission shaft 9, and the double-fan-leaf stacked heat dissipation starts, meeting the high-temperature high-load heat dissipation requirement.

[0093] In the temperature reduction recovery stage, i.e. in the load reduction / shut down, as the temperature decreases, the memory alloy 10 cools and shrinks. The transmission shaft 9 is pulled to move forward along the axial direction, the second spline 33 is first detached from the second key groove 34, and the transmission shaft 9 is disconnected from the rotating block 7; then the protruding block 20 is detached from the corresponding recess 27, and the transmission shaft 9 is disconnected from the sliding sleeve 8.

[0094] The transmission shaft 9 moves forward to drive the gear 11 to rotate reversely, the gear 11 drives the sliding sleeve 8 to slide to the direction of the rotating block 7 through the rack 12, the distance between the first annular magnet 14 and the second annular magnet 15 is reduced, and the magnetic repulsion force is increased; when the magnetic repulsion force between the first annular magnet 14 and the second annular magnet 15 is greater than the magnetic attraction force between the first annular magnet 14 and the first annular metal plate and the magnetic attraction force between the second annular magnet 15 and the second annular metal plate, the first annular magnet 14 is separated from the first annular metal plate, and the second annular magnet 15 is separated from the second annular metal plate; thereafter, the first sliding ring 17 again stretches the first spring 22, and the second sliding ring 29 again stretches the second spring 30. At the same time, the first sliding ring 17 drives the first fixed plate 23, the first fixed plate 23 drives the first push shaft, the first push shaft drives the first transmission plate 13 through the first waist-shaped hole 24, the first transmission plate 13 drives the first rotating shaft to rotate reversely, and the first rotating shaft drives the first fan blade 5 to rotate reversely and reset. At the same time, the second sliding ring 29 drives the second fixed plate 35, the second fixed plate 35 drives the second push shaft, the second push shaft drives the second transmission plate 37 through the second waist-shaped hole 36, the second transmission plate 37 drives the second rotating shaft to rotate reversely, and the second rotating shaft drives the second fan blade 6 to rotate reversely and reset.

[0095] In the process of sliding the sliding sleeve 8 to the rotating block 7, the transmission ring 18 gradually inserts into the annular sink groove 26 and finally contacts the groove bottom of the annular sink groove 26. After the transmission ring 18 contacts the groove bottom of the annular sink groove 26, with the sliding sleeve 8 continuing to approach the rotating block 7, the transmission ring 18 rotates by a certain radian and drives the rotating block 7 to rotate by a certain radian, and the rotating block 7 drives the first fan blade 5 and the second fan blade 6 to form an initial misalignment state, thereby again blocking the heat dissipation hole.

[0096] When the sliding sleeve 8 again contacts the rotating block 7, the whole body returns to the initial state, and waits for the next heat dissipation start.

[0097] Finally, it should be noted that: the above only describes the preferred embodiments of the present application and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A high-power alternator, comprising a casing (1) having a rear end cover (2) mounted thereon, and a main shaft (3) of an alternator rotatably mounted in the casing (1); characterized in that: a plurality of first fan blades (5) are mounted on a rotating block (7) provided in a rear end of the rear end cover (2), and the rotating block (7) is rotatably mounted on a support frame (4) fixedly arranged at the rear end of the rear end cover (2); a transmission shaft (9) is coaxially arranged at a rear end of the main shaft (3), a connecting groove is formed in a front end of the transmission shaft (9) along an axial direction, the rear end of the main shaft (3) is inserted into the connecting groove and is in transmission connection with the transmission shaft (9), and a memory alloy (10) is arranged in the connecting groove; one end of the memory alloy (10) is fixedly connected with the main shaft (3), and the other end is fixedly connected with the transmission shaft (9); a second butt joint assembly is arranged between a front end of the rotating block (7) and a rear end of the transmission shaft (9) for clutch-type transmission cooperation; a sliding sleeve (8) is arranged between the rotating block (7) and the transmission shaft (9), and a plurality of second fan blades (6) are mounted on the sliding sleeve (8); a plurality of through holes are formed in the sliding sleeve (8) along an axial direction of the transmission shaft (9) for the transmission shaft (9) to pass through; a first butt joint assembly is arranged between the sliding sleeve (8) and the transmission shaft (9) for clutch-type transmission cooperation; a plurality of insertion grooves (28) are formed in a rear end of the sliding sleeve (8) along an axial direction of the transmission shaft (9), and the insertion grooves (28) are uniformly distributed along a circumferential direction of the transmission shaft (9); a connecting ring (16) is rotatably mounted at the front end of the rotating block (7), a plurality of support rods are fixedly arranged at a front end of the connecting ring (16), and the support rods correspond to the insertion grooves (28) one by one; each transmission rod is inserted into a corresponding insertion groove (28) and is in limiting sliding cooperation with the corresponding insertion groove (28); and a driving mechanism is arranged between the rear end of the transmission shaft (9) and the sliding sleeve (8) for driving the sliding sleeve (8) to slide close to or away from the rotating block (7). The second butt joint assembly comprises a second spline (33) and a second key groove (34); the second spline (33) is fixed to the front end of the rotating block (7), and the second key groove (34) is formed in the rear end of the transmission shaft (9); and the second spline (33) and the second key groove (34) are in clutch-type transmission cooperation. The first butt joint assembly comprises a first spline and a first key groove; the first spline is composed of a plurality of protrusions (20) fixed to the transmission shaft (9), and the protrusions (20) are uniformly distributed along a circumferential direction of the transmission shaft (9); the first key groove is composed of a plurality of recesses (27) formed on an inner wall of the sliding sleeve (8), and the recesses (27) correspond to the protrusions (20) one by one; and each protrusion (20) is in clutch-type transmission cooperation with a corresponding recess (27). ​ ​ ​ ​ 2. A high power alternator according to claim 1, characterized in that: ​ 3. A high power alternator according to claim 1, characterized in that: ​ 4. A high power alternator according to claim 1, characterized in that: The driving mechanism comprises a plurality of gears (11); the plurality of gears (11) correspond to a plurality of support rods one by one, each gear (11) is rotationally installed on the corresponding support rod; a rack (12) parallel to the transmission shaft (9) is fixedly arranged in the slot (28) where each support rod is located, and each rack (12) is in meshing cooperation with the gear (11) in the slot (28) where it is located; a plurality of notches are formed on the inner wall of the sliding sleeve (8) along the axial direction of the transmission shaft (9), and the plurality of notches correspond to the plurality of slots (28) one by one; each notch is in communication with the corresponding slot (28), and each gear (11) is slidably penetrated through the notch communicated by the slot (28); the rear end of the transmission shaft (9) is provided with a gear slot (19) in meshing cooperation with the plurality of gears (11).

5. A high power alternator according to claim 1, characterized in that: The transmission shaft (9) is provided with a clamping groove in the axial direction, and a clamping block is limitingly and slidably installed in the clamping groove; the clamping block is fixed to the inner wall of the connecting groove in the transmission shaft (9).

6. A high power alternator according to claim 1, characterized in that: The plurality of first leaves (5) and the plurality of second leaves (6) are uniformly distributed along the circumferential direction of the main shaft (3), each first leaf (5) is rotationally installed on the rotating block (7), and each second leaf (6) is rotationally installed on the sliding sleeve (8); there is one second leaf (6) between two adjacent first leaves (5); the first rotating block (7) is provided with a first annular groove with a front slot in the front end, and the first annular groove is provided with a first transmission mechanism for driving all the first leaves (5) to rotate; the rear end of the sliding sleeve (8) is provided with a second annular groove with a rear slot, and the second annular groove is provided with a second transmission mechanism for driving all the second leaves (6) to rotate.

7. A high power alternator according to claim 6, characterized in that: The first transmission mechanism comprises a first sliding ring (17) and a first annular magnet (14); the first sliding ring (17) and the first annular magnet (14) are coaxially and slidably arranged in a first annular groove; the first annular magnet (14) is located between the first sliding ring (17) and the sliding sleeve (8); a plurality of first connecting blocks are fixedly arranged between the first sliding ring (17) and the first annular magnet (14); the first connecting blocks are evenly distributed along the circumference of the first sliding ring (17); a plurality of first fixed blocks (21) are arranged in the first annular groove; the first fixed blocks (21) are evenly distributed along the circumference of the main shaft (3) and are fixedly connected with the rotating block (7); each first fixed block (21) is located between the first sliding ring (17) and the first annular magnet (14); a first spring (22) is fixedly arranged between each first fixed block (21) and the first sliding ring (17); a plurality of first fixed plates (23) are fixedly arranged on the end face of the first sliding ring (17) close to the first annular magnet (14); a first push shaft is fixedly arranged on each first fixed plate (23) along the radial direction of the main shaft (3); a first rotating shaft is fixedly arranged on each first fan blade (5); each first rotating shaft penetrates into the first annular groove along the radial direction of the main shaft (3) and is rotatably connected with the rotating block (7); a first transmission plate (13) with a first waist-shaped hole (24) is fixedly arranged on each first rotating shaft; the first transmission plates (13) and the first push shafts are one-to-one corresponding; each first push shaft penetrates into the first waist-shaped hole (24) of the corresponding first transmission plate (13) and abuts against the corresponding first transmission plate (13) for transmission.

8. A high power alternator according to claim 7, characterized in that: The second transmission mechanism comprises a second sliding ring (29) and a second annular magnet (15); the second sliding ring (29) and the second annular magnet (15) are coaxially and slidingly arranged in the second ring groove; the second annular magnet (15) is located between the second sliding ring (29) and the sliding sleeve (8); a plurality of second connecting blocks are fixedly arranged between the second sliding ring (29) and the second annular magnet (15); the second connecting blocks are evenly distributed along the circumference of the second sliding ring (29); a plurality of second fixed blocks (32) are arranged in the second ring groove; the second fixed blocks (32) are evenly distributed along the circumference of the main shaft (3) and are fixedly connected with the sliding sleeve (8); each second fixed block (32) is located between the second sliding ring (29) and the second annular magnet (15); a second spring (30) is fixedly arranged between each second fixed block (32) and the second sliding ring (29); a plurality of second fixed plates (35) are fixedly arranged on the end face of the second sliding ring (29) close to the second annular magnet (15); a second push shaft is fixedly arranged on each second fixed plate (35) along the radial direction of the main shaft (3); a second rotating shaft is fixedly arranged on each second fan blade (6); each second rotating shaft penetrates into the second ring groove along the radial direction of the main shaft (3) and is rotationally connected with the sliding sleeve (8); a second transmission plate (37) with a second waist-shaped hole (36) is fixedly arranged on each second rotating shaft; the second transmission plates (37) correspond to the second push shafts one by one; each second push shaft penetrates into the second waist-shaped hole (36) of the corresponding second transmission plate (37) and abuts against the corresponding second transmission plate (37) for transmission.

9. A high power alternator according to claim 8, characterized in that: The first annular magnet (14) and the second annular magnet (15) are magnetically repelled; a plurality of first limiting rods (25) are fixedly arranged on the end of the first sliding ring (17) close to the first annular magnet (14); the first limiting rods (25) correspond to the first fixed blocks (21) one by one; each first limiting rod (25) faces the corresponding first fixed block (21) along the axial direction of the main shaft (3); a plurality of second limiting rods (31) are fixedly arranged on the end of the second sliding ring (29) close to the second annular magnet (15); the second limiting rods (31) correspond to the second fixed blocks (32) one by one; each second limiting rod (31) faces the corresponding second fixed block (32) along the axial direction of the main shaft (3).

10. A high power alternator according to claim 1, characterized in that: The front end of the rotating block (7) is fixedly provided with a transmission ring (18); the transmission ring (18) is coaxial with the main shaft (3); a wave-shaped ring groove is formed in the front end of the transmission ring (18); a ring-shaped recess (26) is formed in the rear end of the sliding sleeve (8) along the axial direction of the main shaft (3); the ring-shaped recess (26) matches the front end of the transmission ring (18) and is used for inserting the transmission ring (18); the bottom of the ring-shaped recess (26) matches the front end of the transmission ring (18) and is used for abutting against the transmission ring (18) for transmission.

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