Totally-closed fan-cooled three-phase asynchronous motor

Abstract

The invention discloses a totally-closed fan-cooled three-phase asynchronous motor, and relates to the technical field of three-phase asynchronous motors. The device comprises a shell, a rotating shaft is arranged in the shell, a protective cover is fixedly installed on one side of the shell, evenly-distributed fan blades are fixedly installed at the end, close to the protective cover, of the rotating shaft, and symmetrically-distributed fixing rods are fixedly installed in the protective cover. A fixed ring is jointly and fixedly mounted on the opposite sides of the two fixed rods, a movable pipe rotationally penetrates through the interior of the fixed ring, the rotating shaft penetrates through the movable pipe, connecting rods which are annularly distributed are fixedly mounted on the outer side of the movable pipe, and a rotating ring is jointly and fixedly mounted at the ends, away from the movable pipe, of the multiple connecting rods. Wind power can be adjusted by adjusting the size of the coincidence gap between the barrier plate and the heat dissipation groove, and the situation that the internal temperature of the motor is too low, and consequently an insulating material is embrittled is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of three-phase asynchronous motors, in particular to a fully enclosed self-fan-cooled three-phase asynchronous motor. Background Art

[0002] A three-phase asynchronous motor, also known as a three-phase induction motor, is an electric motor powered by a three-phase AC power supply. Its working principle is based on the law of electromagnetic induction. A rotating magnetic field is generated in the stator winding through a three-phase current, thereby driving the rotor to rotate. Specifically, when a three-phase AC power supply is applied to the stator winding of the motor, a rotating magnetic field is formed in the stator core. The direction and size of this rotating magnetic field change with the power supply frequency. Since the rotor and the stator's rotating magnetic field rotate in the same direction, but the actual speed of the rotor is slightly lower than the synchronous speed of the rotating magnetic field, there is a slip rate, which is the origin of the word "asynchronous". When the three-phase asynchronous motor is in use, it usually needs a cooling fan to dissipate the heat of the motor. However, the fan is usually installed on the rotating shaft inside the motor, and the wind force of the fan cannot be adjusted. When the motor is used in an environment with low external temperature, the fan continues to cool the motor. Excessive cooling may cause the internal temperature of the motor to be too low, which will make the insulation material of the motor brittle and reduce its insulation performance, thereby increasing the risk of insulation breakdown. In addition, too low a temperature may also affect the performance of the lubricant inside the motor, resulting in poor lubrication effect, increased mechanical wear and failure rate. In view of the above problems, the inventor proposes a fully enclosed self-fan-cooled three-phase asynchronous motor to solve the above problems. Summary of the invention

[0003] In order to solve the problem that the wind force of the fan cannot be adjusted; the purpose of the present invention is to provide a fully enclosed self-fan-cooled three-phase asynchronous motor.

[0004] In order to solve the above technical problems, the present invention adopts the following technical scheme: a fully enclosed self-fan-cooled three-phase asynchronous motor, comprising a shell, a rotating shaft is arranged inside the shell, a protective cover is fixedly installed on one side of the shell, and evenly distributed fan blades are fixedly installed on one end of the rotating shaft close to the protective cover, symmetrically distributed fixing rods are fixedly installed inside the protective cover, and a fixing ring is fixedly installed on opposite sides of two fixing rods, a movable tube rotates inside the fixing ring and penetrates through it, the rotating shaft penetrates the movable tube, and an annularly distributed connecting rods are fixedly installed on the outer side of the movable tube, and a rotating ring is fixedly installed on one end of a plurality of connecting rods away from the movable tube, wherein evenly distributed blocking plates are fixedly installed on the outer sides of two connecting rods, two groups of evenly distributed heat dissipation grooves are opened on one side of the shell close to the protective cover, and the blocking plate and the heat dissipation groove are used in combination, a large gear is fixedly arranged on the outer side of the rotating ring, a small gear is meshed and connected to the top of the large gear, and a rotating rod is fixedly arranged in the middle of the small gear.

[0005] Preferably, a heat sink is detachably mounted on one side of the protective cover, and the surface of the heat sink is provided with evenly distributed holes, a filter plate is fixedly mounted inside the protective cover, the surface of the heat sink is provided with symmetrically distributed first slots, a pull plate is movably mounted inside the first slot, the pull plate is distributed in an L-shape, the pull plate and the first slot are fixedly connected by a spring, symmetrically distributed positioning holes are provided inside the protective cover, the pull plate and the positioning holes are used in combination, the surface of the filter plate is provided with symmetrically distributed through slots, and the pull plate passes through the through slots.

[0006] Preferably, a limiting rod is fixedly installed inside the first empty slot, and the limiting rod passes through the pull plate.

[0007] Preferably, a dustproof plate is fixedly mounted on one side of the pull plate close to the spring, and symmetrically distributed second empty slots are provided inside the heat dissipation plate, and the dustproof plate and the second empty slots are used in conjunction with each other.

[0008] Preferably, symmetrically distributed positioning rods are fixedly mounted on one side of the heat sink close to the protective cover, and symmetrically distributed positioning grooves are provided on one side of the protective cover close to the heat sink, and the positioning rods are movably clamped in the positioning grooves.

[0009] Preferably, a first protective box is fixedly mounted on the top of the protective cover, and the pinion is located in the first protective box.

[0010] Preferably, a worm wheel is fixedly provided at one end of the rotating rod away from the pinion gear, and a worm is meshingly connected to the outer side of the worm wheel.

[0011] Preferably, a second protective box is fixedly mounted on the top of the protective cover, and the worm rotates and penetrates the second protective box.

[0012] Preferably, a third slot is formed at the top of the protective cover, and the pinion gear passes through the third slot.

[0013] Preferably, a stabilizing plate is fixedly mounted on the top of the protective cover, and the rotating rod rotates through the stabilizing plate.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention can adjust the wind force by adjusting the size of the overlap gap between the blocking plate and the heat dissipation slot, thereby preventing the insulation material from becoming brittle due to excessively low internal temperature of the motor; 2. The present invention can quickly disassemble and assemble the heat dissipation plate, making it convenient for the staff to clean the dust on the surface of the filter plate, thereby improving the cleaning efficiency; 3. When the pull plate is in an idle state, the dustproof plate of the present invention can block the first empty slot to prevent dust from entering the protective cover through the first empty slot, thereby increasing the service life of the filter plate. When the pull plate moves, the dustproof plate enters the second empty slot, thereby allowing the pull plate to move smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 It is a schematic diagram of the structure of the protective cover and the heat sink of the present invention.

[0018] Figure 3 It is a schematic diagram of the structure inside the protective cover of the present invention.

[0019] Figure 4 It is a schematic diagram of the blocking plate structure of the present invention.

[0020] Figure 5 It is a schematic diagram of the structure of the heat dissipation slot of the present invention.

[0021] Figure 6 It is a schematic diagram of the structure of the pull plate and the positioning hole of the present invention.

[0022] In the figure: 101, shell; 102, rotating shaft; 103, protective cover; 104, fan blade; 105, fixing rod; 106, fixing ring; 107, movable tube; 108, connecting rod; 109, rotating ring; 110, blocking plate; 111, heat dissipation groove; 112, large gear; 113, small gear; 114, rotating rod; 201, heat dissipation plate; 202, filter plate; 203, first empty slot; 204, pull plate; 205, spring; 206, positioning hole; 207, through slot; 3, limit rod; 4, dustproof plate; 41, second empty slot; 5, positioning rod; 51, positioning slot; 6, first protective box; 7, worm wheel; 71, worm; 8, second protective box; 9, third empty slot; 10, stabilizing plate. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Example: Figure 1-6 As shown, the present invention provides a fully enclosed self-fan-cooled three-phase asynchronous motor, including a housing 101, a rotating shaft 102 is arranged inside the housing 101, a protective cover 103 is fixedly installed on one side of the housing 101, and evenly distributed fan blades 104 are fixedly installed on one end of the rotating shaft 102 close to the protective cover 103, and symmetrically distributed fixing rods 105 are fixedly installed inside the protective cover 103, and fixing rings 106 are fixedly installed on opposite sides of the two fixing rods 105, and a movable tube 107 is rotatably penetrated inside the fixing ring 106, and the rotating shaft 102 penetrates the movable tube 107, and the movable tube 107 An annularly distributed connecting rod 108 is fixedly installed on the outer side, and a rotating ring 109 is fixedly installed on one end of the multiple connecting rods 108 away from the movable tube 107, wherein evenly distributed blocking plates 110 are fixedly installed on the outer sides of two connecting rods 108, and two groups of evenly distributed heat dissipation grooves 111 are opened on the side of the shell 101 close to the protective cover 103, and the blocking plates 110 and the heat dissipation grooves 111 are used together, and a large gear 112 is fixedly provided on the outer side of the rotating ring 109, and a small gear 113 is meshed and connected to the top of the large gear 112, and a rotating rod 114 is fixedly provided in the middle of the small gear 113.

[0025] A heat sink 201 is detachably mounted on one side of the protective cover 103, and the surface of the heat sink 201 is provided with evenly distributed holes, a filter plate 202 is fixedly mounted inside the protective cover 103, the surface of the heat sink 201 is provided with symmetrically distributed first slots 203, a pull plate 204 is movably mounted inside the first slot 203, the pull plate 204 is L-shaped, the pull plate 204 and the first slot 203 are fixedly connected by a spring 205, symmetrically distributed positioning holes 206 are disposed inside the protective cover 103, the pull plate 204 and the positioning holes 206 are used in conjunction with each other, symmetrically distributed through slots 207 are disposed on the surface of the filter plate 202, and the pull plate 204 penetrates the through slots 207.

[0026] A limiting rod 3 is fixedly installed inside the first slot 203 , and the limiting rod 3 passes through the pulling plate 204 .

[0027] By adopting the above technical solution, the pull plate 204 can be positioned to prevent it from falling from the first empty slot 203 .

[0028] A dustproof plate 4 is fixedly mounted on one side of the pull plate 204 close to the spring 205 , and symmetrically distributed second slots 41 are provided inside the heat dissipation plate 201 , and the dustproof plate 4 and the second slots 41 are used in conjunction with each other.

[0029] By adopting the above technical solution, when the pull plate 204 is in an idle state, the dustproof plate 4 can block the first empty slot 203 to prevent dust from entering the protective cover 103 through the first empty slot 203, thereby increasing the service life of the filter plate 202. When the pull plate 204 moves, the dustproof plate 4 enters the second empty slot 41, so that the pull plate 204 can move smoothly.

[0030] A symmetrically distributed positioning rod 5 is fixedly mounted on one side of the heat sink 201 close to the protective cover 103 , and a symmetrically distributed positioning groove 51 is opened on one side of the protective cover 103 close to the heat sink 201 , in which the positioning rod 5 is movably clamped.

[0031] By adopting the above technical solution, the fitting angle of the heat sink 201 is made more accurate, and it is convenient for the pull plate 204 to enter the positioning hole 206 .

[0032] A first protective box 6 is fixedly mounted on the top of the protective cover 103 , and the pinion 113 is located in the first protective box 6 .

[0033] By adopting the above technical solution, it is possible to avoid the pinion 113 being directly exposed to the outside, thereby increasing its service life.

[0034] A worm wheel 7 is fixedly provided at one end of the rotating rod 114 away from the pinion gear 113 , and a worm 71 is meshingly connected to the outer side of the worm wheel 7 .

[0035] By adopting the above technical solution, the rotating rod 114 can be self-locked to prevent the rotating rod 114 from rotating on its own.

[0036] A second protection box 8 is fixedly mounted on the top of the protection cover 103 , and the worm 71 rotates and penetrates the second protection box 8 .

[0037] By adopting the above technical solution, the worm wheel 7 and the worm 71 are prevented from being directly exposed to the outside, thereby increasing their service life. At the same time, the worm 71 can be supported to enable it to rotate smoothly.

[0038] A third slot 9 is formed at the top of the protective cover 103 , and the pinion gear 113 passes through the third slot 9 .

[0039] By adopting the above technical solution, the small gear 113 and the large gear 112 can mesh smoothly.

[0040] A stabilizing plate 10 is fixedly mounted on the top of the protective cover 103 , and the rotating rod 114 rotates and penetrates the stabilizing plate 10 .

[0041] By adopting the above technical solution, the stability of the rotating rod 114 is improved.

[0042] Working principle: In actual use, the rotating rod 114 is driven to rotate, which drives the small gear 113 to rotate, and the small gear 113 drives the large gear 112 to rotate, and the large gear 112 rotates the rotating ring 109, and the rotating ring 109 drives the connecting rod 108, the movable tube 107 and the blocking plate 110 to rotate. When the wind force of the fan blade 104 needs to be reduced, the blocking plate 110 is rotated to achieve the overlap with the heat dissipation groove 111. When the blocking plate 110 and the heat dissipation groove 111 completely overlap, the blocking plate 110 can block the wind generated by the fan blade 104 to prevent it from entering the interior of the housing 101, so that the wind force can be adjusted by adjusting the size of the overlapping gap between the blocking plate 110 and the heat dissipation groove 111; the staff presses The two pull plates 204 make the two pull plates 204 move towards each other. At this time, the pull plates 204 are detached from the positioning holes 206, realizing the disassembly of the heat sink 201, making it convenient for the staff to clean the dust on the surface of the filter plate 202, so that the external cold air can better enter the protective cover 103 from the holes on the surface of the heat sink 201. When the heat sink 201 needs to be installed, the pull plates 204 are pressed again. The pull plates 204 can squeeze the springs 205 during the movement, and then the heat sink 201 and the protective cover 103 are fitted together. At this time, stop applying pressure to the pull plates 204, so that the springs 205 release their elastic force to drive the pull plates 204 to reset, until the pull plates 204 are re-stuck in the positioning holes 206, completing the installation of the heat sink 201.

[0043] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A fully enclosed self-fan-cooled three-phase asynchronous motor, comprising a housing (101), characterized in that: A rotating shaft (102) is provided inside the shell (101); a protective cover (103) is fixedly mounted on one side of the shell (101); evenly distributed fan blades (104) are fixedly mounted on one end of the rotating shaft (102) close to the protective cover (103); symmetrically distributed fixing rods (105) are fixedly mounted inside the protective cover (103); fixing rings (106) are fixedly mounted on opposite sides of two fixing rods (105); a movable tube (107) is rotatably penetrated inside the fixing ring (106); the rotating shaft (102) penetrates the movable tube (107); and annularly distributed connecting rods (107) are fixedly mounted on the outside of the movable tube (107). 108), a rotating ring (109) is fixedly mounted on one end of the plurality of connecting rods (108) away from the movable tube (107), wherein evenly distributed blocking plates (110) are fixedly mounted on the outer sides of two of the connecting rods (108), two groups of evenly distributed heat dissipation grooves (111) are provided on a side of the housing (101) close to the protective cover (103), the blocking plates (110) and the heat dissipation grooves (111) are used in conjunction with each other, a large gear (112) is fixedly mounted on the outer side of the rotating ring (109), a small gear (113) is meshedly connected to the top of the large gear (112), and a rotating rod (114) is fixedly mounted in the middle of the small gear (113).

2. A fully enclosed self-fan-cooled three-phase asynchronous motor as claimed in claim 1, characterized in that: A heat sink (201) is detachably mounted on one side of the protective cover (103); the surface of the heat sink (201) is provided with evenly distributed holes; a filter plate (202) is fixedly mounted inside the protective cover (103); the surface of the heat sink (201) is provided with symmetrically distributed first slots (203); a pull plate (204) is movably mounted inside the first slot (203); the pull plate (204) is distributed in an L-shaped state; the pull plate (204) and the first slot (203) are fixedly connected via a spring (205); the interior of the protective cover (103) is provided with symmetrically distributed positioning holes (206); the pull plate (204) and the positioning holes (206) are used in combination; the surface of the filter plate (202) is provided with symmetrically distributed through slots (207); the pull plate (204) passes through the through slots (207).

3. A fully enclosed self-fan-cooled three-phase asynchronous motor as claimed in claim 2, characterized in that: A limiting rod (3) is fixedly installed inside the first empty slot (203), and the limiting rod (3) passes through the pull plate (204).

4. A fully enclosed self-fan-cooled three-phase asynchronous motor as claimed in claim 2, characterized in that: A dustproof plate (4) is fixedly mounted on one side of the pull plate (204) close to the spring (205), and symmetrically distributed second slots (41) are provided inside the heat dissipation plate (201), and the dustproof plate (4) and the second slots (41) are used in conjunction with each other.

5. A fully enclosed self-fan-cooled three-phase asynchronous motor as claimed in claim 4, characterized in that: A symmetrically distributed positioning rod (5) is fixedly mounted on one side of the heat dissipation plate (201) close to the protective cover (103), and a symmetrically distributed positioning groove (51) is provided on one side of the protective cover (103) close to the heat dissipation plate (201), and the positioning rod (5) is movably clamped in the positioning groove (51).

6. A fully enclosed self-fan-cooled three-phase asynchronous motor as claimed in claim 1, characterized in that: A first protection box (6) is fixedly mounted on the top end of the protection cover (103), and the pinion gear (113) is located in the first protection box (6).

7. A fully enclosed self-fan-cooled three-phase asynchronous motor as claimed in claim 1, characterized in that: A worm wheel (7) is fixedly provided at one end of the rotating rod (114) away from the pinion gear (113), and a worm (71) is meshingly connected to the outer side of the worm wheel (7).

8. A fully enclosed self-fan-cooled three-phase asynchronous motor as claimed in claim 7, characterized in that: A second protection box (8) is fixedly mounted on the top end of the protection cover (103), and the worm (71) rotates and penetrates the second protection box (8).

9. A fully enclosed self-fan-cooled three-phase asynchronous motor as claimed in claim 1, characterized in that: A third empty slot (9) is formed at the top of the protective cover (103), and the pinion gear (113) passes through the third empty slot (9).

10. A fully enclosed self-fan-cooled three-phase asynchronous motor as claimed in claim 9, characterized in that: A stabilizing plate (10) is fixedly mounted on the top end of the protective cover (103), and the rotating rod (114) rotates and penetrates the stabilizing plate (10).

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