Motor and strong heat dissipation structure thereof

Abstract

The utility model provides a motor and a strong heat dissipation structure thereof, which comprise a casing, a rear end cover arranged at the rear end of the casing, a sealing cavity formed by the casing and the rear end cover, a rotating shaft rotatably arranged in the sealing cavity and a driving source I for driving the rotating shaft to rotate, the rotating shaft penetrates through the rear end cover, a first fan blade and a second fan blade are arranged on the rotating shaft, and the second fan blade is arranged on the driving source I. The first fan blade is arranged in the sealing cavity and coaxially rotates with the rotating shaft, the second fan blade is arranged on the outer side of the rear end cover and fixedly connected with the rotating shaft, a net cover is further installed on the machine shell, the net cover is arranged on the outer side of the second fan blade, and cooling fins are annularly arranged on the outer ring of the machine shell. Therefore, the hot air in the sealing cavity circulates, the heat is uniformly distributed on the casing, the heat dissipation efficiency is improved in a sealed environment, the problem of overhigh temperature is reduced, and the service life of the motor is prolonged.

Description

Technical Field

[0001] The utility model relates to an electric motor, in particular to an electric motor and a strong heat dissipation structure thereof. Background Art

[0002] Motor heat dissipation is crucial to ensure stable operation of the motor, extend its service life, improve work efficiency and ensure equipment safety. Therefore, in the process of motor design and use, it is necessary to fully consider the heat dissipation problem and take effective heat dissipation measures.

[0003] At present, a Chinese patent with announcement number CN209516802U discloses a heat dissipation motor, including a casing, a rotating shaft, and a rear end cover. The rotor and the stator are both arranged in the casing. The rotating shaft passes through the rear end cover, and a fan is arranged at the tail. The rear end cover is provided with multiple ventilation holes, and the motor is cooled by the rotation of the fan and the ventilation holes.

[0004] The above patent still has shortcomings. The heat dissipation by opening vents and using fans cannot be applied to all environments. When the motor is used in a dusty or humid environment, dust or water can easily enter the cavity where the stator and rotor are placed, causing wear of the internal parts of the motor and loss of insulation resistance, resulting in damage to the motor. Therefore, the interior of the motor needs to be in a sealed state. However, when the interior of the motor is in a sealed state, only blowing the rear cover with a fan cannot efficiently dissipate the heat inside the motor. Utility Model Content

[0005] In view of this, the first object of the utility model is to provide a strong heat dissipation structure, which has the function of efficiently dissipating heat for a sealed cavity.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: a strong heat dissipation structure, including a casing, a rear end cover is arranged at the rear end of the casing, the casing and the rear end cover form a sealed cavity, and also include a rotating shaft rotatably arranged in the sealed cavity and a driving source for driving the rotating shaft to rotate, the rotating shaft passes through the rear end cover, and a first fan blade and a second fan blade are arranged on the rotating shaft, the first fan blade is arranged in the sealed cavity and rotates coaxially with the rotating shaft, the second fan blade is arranged on the outside of the rear end cover and is fixedly connected to the rotating shaft, the casing is also equipped with a mesh cover, the mesh cover is arranged on the outside of the second fan blade, and the outer ring of the casing is annularly provided with heat dissipation fins.

[0007] Through the above-mentioned technical means, by arranging the first fan blade in the sealed cavity, the hot air in the sealed cavity can be circulated, and the heat can be distributed more evenly on the casing, thereby increasing the heat dissipation efficiency in a sealed environment, thereby reducing the problem of local excessive temperature, and further increasing the heat dissipation efficiency through the heat dissipation fins. By arranging the second fan blade on the other side of the rear end cover, the air circulation near the rear end cover is accelerated, thereby increasing the cooling efficiency.

[0008] Preferably, a plurality of heat dissipation pipes are also provided on the rear end cover, and the heat dissipation pipes are installed on the inner side of the sealed cavity, and air holes are provided in the heat dissipation pipes. An air inlet is provided on the casing, and an air outlet is provided on the rear end cover. Both ends of the heat dissipation pipes are connected to the air inlet and the air outlet respectively, and the second fan blade drives the airflow from the air inlet to the air outlet.

[0009] Through the above technical means, by setting a heat dissipation pipe and passing the heat dissipation pipe through the inside of the sealed cavity, and by setting air holes, the heat dissipation area is increased, and the second fan blade is used to make the gas pass through the air holes, thereby further increasing the cooling efficiency.

[0010] Preferably, the rear end cover includes a fixed plate and a mounting ring, a bearing is provided between the rotating shaft and the fixed plate, the fixed plate is fixed to the casing by screws, an air outlet is provided on the mounting ring, the air inlet is connected to the air outlet, the air outlet is connected to the air hole, and the heat dissipation pipe is detachably connected to the rear end cover by screws.

[0011] Through the above technical means, by fixing the heat dissipation pipe on the mounting ring, the heat dissipation pipe and the mounting ring can be fixed in advance when splicing the motor, and then the fixing plate is installed on the casing, thereby making the installation of the heat dissipation pipe more convenient.

[0012] Preferably, the outer side of the mounting ring is circular and the inner side is polygonal, and flange mounting plates are provided at both ends of the heat dissipation pipe. The flange mounting plate on one side is fixed to the inner side of the mounting ring by screws, and the flange mounting plate on the other side is fixed to the inner wall of the fixing plate by screws.

[0013] Through the above technical means, by setting the inside of the mounting ring to be polygonal, the installation of the flange mounting plate is facilitated, and by setting the outside of the mounting ring to be circular, the installation between the mounting ring and the casing is facilitated.

[0014] Preferably, the outer surface of the rear end cover has a circular array of conical fins, and the air outlet is arranged between the conical fins.

[0015] By means of the above technical means, the heat dissipation area of ​​the rear end cover is increased through the tapered fins, thereby further increasing the heat dissipation efficiency.

[0016] Preferably, a step mounting portion and a threaded mounting portion are also provided on the rotating shaft, and the first fan blade includes blade one and a blade ring seat, and the blade one is arranged in a ring array on the blade ring seat, and key grooves are provided on the blade ring seat and the step mounting portion, and a retaining ring is provided on the threaded mounting portion, and the retaining ring fixes the blade ring seat to the step mounting portion.

[0017] Through the above technical means, the first fan blade is fixed to the step mounting portion through the retaining ring, thereby facilitating the installation and maintenance of the first fan blade.

[0018] Preferably, the second fan blade includes blade 2 and a blade base, and blade 2 is arranged in a circular array on the blade base. A sleeve hole is opened in the middle of the fan blade base, a pair of through holes are opened at the bottom of the sleeve hole, and a pair of threaded holes are opened on the rotating shaft. The fan blade base and the rotating shaft are fixedly connected by screws.

[0019] Through the above technical means, the second fan blade is installed on the rotating shaft through a pair of screws to prevent slipping between the second fan blade and the rotating shaft.

[0020] The second purpose of the utility model is to provide a motor for installing a strong heat dissipation structure.

[0021] A motor, wherein a stator and a rotor are arranged in a sealed cavity, and the driving source comprises a central shaft arranged in the center of the rotor, and the central shaft is integrally formed with a rotating shaft.

[0022] Compared with the prior art, the beneficial effects of the utility model are:

[0023] 1. By arranging the first fan blade on the rotating shaft, the air in the sealed cavity flows, so that the heat inside the motor is evenly distributed on the casing and transferred out through heat conduction. The heat dissipation speed is increased by arranging the heat dissipation fins in an annular manner. By arranging the conical fins on the rear end cover, the heat dissipation efficiency at the rear end cover is increased. By increasing the heat dissipation efficiency of the motor, the service life of the motor is extended;

[0024] 2. By arranging a heat dissipation pipe in the sealed cavity and guiding the gas through the air hole through the second fan blade, the heat propagation speed on the heat dissipation pipe is increased, and the heat dissipation efficiency is further increased;

[0025] 3. The first fan blade and the second fan blade are directly driven to rotate through the central shaft, so that heat is dissipated while the motor is outputting. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of an embodiment;

[0027] Figure 2 is a cross-sectional schematic diagram of an embodiment;

[0028] Figure 3 for Figure 2 Schematic diagram of part A;

[0029] Figure 4 The structure of the rear end cover is shown in Figure 1. Figure 1 ;

[0030] Figure 5 is a partial cross-sectional view of the second fan blade;

[0031] Figure 6 The structure of the rear end cover is shown in Figure 1. Figure 2 .

[0032] Figure numerals: 1, casing; 11, air inlet; 2, rear end cover; 21, heat dissipation pipe; 211, air hole; 212, flange mounting plate; 22, air outlet; 23, fixed plate; 231, conical fin; 24, mounting ring; 25, air outlet; 3; sealing chamber; 33, bearing; 34, first fan blade; 341, blade one; 342, blade ring seat; 35, second fan blade; 351, blade two; 352, fan blade base; 353, sleeve hole; 354, through hole; 4, rotating shaft; 41, step mounting portion; 42, threaded mounting portion; 43, keyway; 44, butt ring; 45, second fan blade mounting portion; 451, threaded hole; 5, mesh cover; 6, heat dissipation fin; 7, stator; 8, rotor; 81, center axis; 9, driving source one. DETAILED DESCRIPTION

[0033] The specific implementation modes of the present invention are further described below in conjunction with the accompanying drawings to make the technical solutions of the present invention easier to understand and grasp.

[0034] A strong heat dissipation structure, such as Figure 1 , Figure 2 As shown, it includes a casing 1, a rear end cover 2 is arranged at the rear end of the casing 1, the casing 1 and the rear end cover 2 form a sealed chamber 3, and also includes a rotating shaft 4 rotatably arranged in the sealed chamber 3 and a driving source 9 driving the rotating shaft 4 to rotate, the driving source 9 drives the rotating shaft 4 to rotate, the rotating shaft 4 passes through the rear end cover 2, and a bearing 33 is arranged between the rear end cover 2, and a first fan blade 34 and a second fan blade 35 are arranged on the rotating shaft 4, the first fan blade 34 is arranged in the sealed chamber 3 and rotates coaxially with the rotating shaft 4, and the second fan blade 35 is arranged on the outer side of the rear end cover 2, and a mesh cover 5 is also installed on the casing 1, and the mesh cover 5 is fixed to the casing 1 by a screw. On the shell 1, the second fan blade 35 is arranged on the inner side of the mesh cover 5, and the mesh cover 5 is used to reduce the entry of dust. The outer ring of the shell 1 is provided with heat dissipation fins 6 in a ring shape. When the rotating shaft 4 rotates, the first fan blade 34 makes the air inside the sealed cavity 3 flow, and transfers the generated heat to the shell 1 more evenly, and increases the heat dissipation efficiency through the heat dissipation fins 6 outside the shell 1. The second fan blade 35 sucks air into the mesh cover 5 and then blows it out, thereby dissipating the heat of the rear end cover 2, realizing multi-directional heat dissipation, and increasing the heat dissipation efficiency of the motor to avoid thermal expansion caused by excessive temperature and wear of the internal parts of the motor, thereby extending the service life of the motor.

[0035] like Figure 2 , Figure 4 , Figure 6As shown, a plurality of heat dissipation pipes 21 are further provided on the rear end cover 2. The material of the heat dissipation pipes 21 is preferably copper with good thermal conductivity. The heat dissipation pipes 21 are installed on the inner side of the sealed cavity 3. Wind holes 211 are provided in the heat dissipation pipes 21. An air inlet 11 is provided on the casing 1, and an air outlet 22 is provided on the rear end cover 2. Both ends of the heat dissipation pipe 21 are connected to the air inlet 11 and the air outlet 22 respectively. When the second fan blade 35 rotates, a negative pressure is formed at the air outlet 22, thereby driving the air flow from the air inlet 11 to the air outlet 22. When heat is generated inside the sealed cavity 3, the heat will be transferred through the heat dissipation pipes 21. At this time, the air flow passing through the wind holes 211 will accelerate the cooling of the heat dissipation pipes 21, thereby realizing accelerated heat dissipation of the sealed cavity 3 and further increasing the cooling efficiency.

[0036] The rear end cover 2 includes a fixing plate 23 and a mounting ring 24. The edge of the fixing plate 23 is fixed to the casing 1 by screws to form a sealed cavity 3. The mounting ring 24 is fixed to the tail of the fixing plate 23. An air outlet 25 is provided on the inner wall thereof. The air inlet 11 is connected to the air outlet 25, and the air outlet 25 is connected to the air hole 211. The air passes through the air inlet 11, the air outlet 25, the air hole 211 and the air outlet 22 in sequence. The sealing cavity 3 is still in a state of good sealing through the precise cooperation between the mounting ring 24 and the inner wall of the casing. The heat dissipation pipe 21 is detachably connected to the rear end cover 2 by screws. When the heat dissipation pipe 21 is installed, the heat dissipation pipe 21 can be installed on the mounting ring 24 first, and the two sides of the heat dissipation pipe 21 are respectively connected to the mounting ring 24 and the fixing plate 23. Then, the rear end cover 2 is installed as a whole in the casing 1, thereby increasing its installation accuracy and installation efficiency.

[0037] The outer side of the mounting ring 24 is circular and the inner side is polygonal. Flange mounting plates 212 are provided at both ends of the heat dissipation pipe 21. The flange mounting plate 212 on one side is fixed to the inner side of the mounting ring 24 by screws, and the flange mounting plate 212 on the other side is fixed to the inner wall of the fixed plate 23 by screws. By setting the outer side of the pressing ring to be circular, the overall installation of the rear end cover 2 is facilitated, and by setting the inner side of the mounting ring 24 to be polygonal, the installation of the flange mounting plate 212 is facilitated. The outer surface of the fixed plate 23 has a circular array of conical fins 231, and the air outlet 22 is arranged between the conical fins 231. The conical fins 231 have the same function as the heat dissipation fins 6, which is to increase the heat dissipation area.

[0038] like Figure 2 , Figure 3As shown, a step mounting portion 41 and a threaded mounting portion 42 are also provided on the rotating shaft 4. The diameter of the step mounting portion 41 is larger than that of the threaded mounting portion 42 and smaller than that of the rotating shaft 4. The first fan blade 34 includes a blade 1 341 and a blade ring seat 342. The blade 1 341 is arranged in an annular array on the blade ring seat 342. A key groove 43 is provided on the blade ring seat 342 and the step mounting portion 41. A retaining ring 44 is provided on the threaded mounting portion 42. When installing the first fan blade 34, first place the flat key in the key groove 43 of the step mounting portion 41, then put the blade ring seat 342 on the step mounting portion 41, and make the key groove 43 of the blade ring seat 342 fit into the flat key. Finally, the blade ring seat 342 is fixed to the step mounting portion 41 by rotating the retaining ring 44.

[0039] like Figure 2 As shown in Figure 5, the second fan blade 35 includes a second blade 351 and a blade base 352. The second blade 351 is arranged in a circular array on the blade base 352. A sleeve hole 353 is opened in the middle of the blade base 352. A second fan blade 35 mounting portion is also arranged on the side of the threaded mounting portion 42 away from the step mounting portion 41. The second fan blade 35 mounting portion is installed in cooperation with the sleeve hole 353. A pair of through holes 354 is opened at the bottom of the sleeve hole 353. A pair of threaded holes 451 is opened on the second fan blade 35 mounting portion. The blade base 352 is fixedly connected to the rotating shaft 4 by screws to prevent the second fan blade 35 and the rotating shaft 4 from slipping. When installing the screws, it is necessary to set spring washers on the screws to prevent the screws from loosening due to motor vibration.

[0040] A motor is provided with a stator 7 and a rotor 8 in a sealed cavity 3, the stator 7 is fixed on the inner wall of the sealed cavity 3, the rotor 8 rotates when power is supplied, a driving source 9 comprises a central shaft 81 arranged at the center of the rotor 8, the central shaft 81 is integrally formed with a rotating shaft 4 and is rotatably fixed by a bearing 33, and a first fan blade 34 and a second fan blade 35 are directly driven to rotate by the central shaft 81, thereby dissipating heat while the motor is outputting.

[0041] Of course, the above are only typical examples of the present invention. In addition, the present invention may have many other specific implementations. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A strong heat dissipation structure, comprising a housing (1), a rear end cover (2) being arranged at the rear end of the housing (1), the housing (1) and the rear end cover (2) forming a sealed cavity (3), wherein: The machine also comprises a rotating shaft (4) rotatably arranged in the sealed cavity (3) and a driving source (9) for driving the rotating shaft (4) to rotate, the rotating shaft (4) passing through the rear end cover (2), the rotating shaft (4) being provided with a first fan blade (34) and a second fan blade (35), the first fan blade (34) being arranged in the sealed cavity (3) and coaxially rotating with the rotating shaft (4), the second fan blade (35) being arranged outside the rear end cover (2) and fixedly connected to the rotating shaft (4), the housing (1) being further provided with a mesh cover (5), the mesh cover (5) being arranged outside the second fan blade (35), and the outer ring of the housing (1) being provided with heat dissipation fins (6) in an annular shape.

2. The strong heat dissipation structure according to claim 1 is characterized in that: The rear end cover (2) is also provided with a plurality of heat dissipation pipes (21), the heat dissipation pipes (21) are installed inside the sealed cavity (3), the heat dissipation pipes (21) are provided with air holes (211), the housing (1) is provided with an air inlet (11), the rear end cover (2) is provided with an air outlet (22), two ends of the heat dissipation pipe (21) are respectively connected to the air inlet (11) and the air outlet (22), and the second fan blade (35) drives the air flow from the air inlet (11) to the air outlet (22).

3. The strong heat dissipation structure according to claim 2 is characterized in that: The rear end cover (2) comprises a fixed disk (23) and a mounting ring (24); a bearing (33) is provided between the rotating shaft (4) and the fixed disk (23); the fixed disk (23) is fixed to the housing (1) by means of screws; an air outlet (25) is provided on the mounting ring (24); the air inlet (11) is in communication with the air outlet (25); the air outlet (25) is in communication with the air hole (211); and the heat dissipation pipe (21) is detachably connected to the rear end cover (2) by means of screws.

4. The strong heat dissipation structure according to claim 3 is characterized in that: The outer side of the mounting ring (24) is circular and the inner side is polygonal. Flange mounting plates (212) are provided at both ends of the heat dissipation pipe (21). The flange mounting plate (212) on one side is fixed to the inner side of the mounting ring (24) by screws, and the flange mounting plate (212) on the other side is fixed to the inner side wall of the fixing plate (23) by screws.

5. The strong heat dissipation structure according to claim 2 is characterized in that: The outer surface of the rear end cover (2) is provided with a circular array of conical fins (231), and the air outlet (22) is arranged between the conical fins (231).

6. The strong heat dissipation structure according to claim 1 is characterized in that: The rotating shaft (4) is also provided with a step mounting portion (41) and a threaded mounting portion (42); the first fan blade (34) comprises a blade one (341) and a blade ring seat (342); the blade one (341) is arranged on the blade ring seat (342) in an annular array; a key groove (43) is provided on the blade ring seat (342) and the step mounting portion (41); a retaining ring (44) is provided on the threaded mounting portion (42); the retaining ring (44) fixes the blade ring seat (342) on the step mounting portion (41).

7. The strong heat dissipation structure according to claim 1 is characterized in that: The second fan blade (35) comprises a second blade (351) and a fan blade base (352); the second blade (351) is arranged in a circular array on the fan blade base (352); a sleeve hole (353) is provided in the middle of the fan blade base (352); a pair of through holes (354) are provided at the bottom of the sleeve hole (353); a pair of threaded holes (451) are provided on the rotating shaft (4); and the fan blade base (352) and the rotating shaft (4) are fixedly connected by screws.

8. A motor, characterized in that: It also includes a strong heat dissipation structure as described in any one of claims 1 to 7, wherein a stator (7) and a rotor (8) are arranged in the sealed cavity (3), and the driving source (9) includes a central axis (81) arranged in the center of the rotor (8).

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