A high-efficiency energy-saving direct-current brushless motor

Abstract

The application relates to the technical field of brushless motors, and discloses a high-efficiency energy-saving direct-current brushless motor which comprises a driving shaft, the outer wall of the driving shaft is fixedly connected with a hollow column one, the inner wall of the hollow column one is fixedly connected with a magnet, the end, away from the driving shaft, of the hollow column one is fixedly connected with a connecting ring one, and the high-efficiency energy-saving direct-current brushless motor further comprises a stator mechanism which comprises a connecting ring three rotatably connected to the inner wall of the connecting ring one through a bearing, and the end, away from the connecting ring one, of the connecting ring three is fixedly connected with a bottom plate. Through the arrangement of the stator mechanism, when the motor is reversed, the airflow direction is automatically switched along with the reversal of the fan blades; at this time, the conical net effectively prevents dust from invading from the back; and the self-cleaning function is realized by using the reverse airflow. The structure ensures the long-term smoothness of the ventilation system, makes the motor still have excellent thermal management performance under complex working conditions, and improves the environmental adaptability and operation reliability of the equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of brushless motor, in particular to a high-efficiency energy-saving DC brushless motor. BACKGROUND

[0002] The brushless DC motor is composed of a motor body and a driver, and is a typical mechatronic product. Since the brushless DC motor operates in a self-control mode, it does not need to add a starting winding to the rotor like a synchronous motor under heavy load starting of frequency conversion speed regulation, and it also does not produce oscillation and out-of-step when the load suddenly changes.

[0003] The patent application with the application number CN201720754129.0 discloses a high-efficiency energy-saving DC brushless motor, which comprises an inner stator core fixedly arranged in an outer rotor core, an excitation winding arranged on the inner stator core, an inner rotor rotatably arranged in the inner stator core, and a machine shell sleeved on the outer rotor core. The inner rotor is fixedly provided with a permanent magnet, one end of the outer rotor core is provided with a driving circuit, and the driving circuit provides driving current for the excitation winding. The high-efficiency energy-saving DC brushless motor has the advantages of long service life, high controllability, high efficiency, adjustability, low energy consumption, low noise, etc., and can be widely applied in many fields.

[0004] In the existing brushless motor, due to the lack of heat dissipation mechanism, under the condition of continuous high load, the temperature in the motor increases cumulatively, and with the long-term effect of thermal stress, the working temperature of the permanent magnet is easy to exceed its critical threshold, which causes the irreversible demagnetization phenomenon of the permanent magnet, and further causes the performance degradation of the motor and even the functional failure, resulting in the decrease of the service life of the motor, which is not conducive to the long-time use of the equipment. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a high-efficiency energy-saving DC brushless motor to solve the problems in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a high-efficiency energy-saving DC brushless motor, comprising a driving shaft, the outer wall of the driving shaft is fixedly connected with a hollow column one, the inner wall of the hollow column one is fixedly connected with a magnet, and the end of the hollow column one away from the driving shaft is fixedly connected with a connecting ring one, further comprising:

[0007] The stator mechanism comprises a connecting ring three rotationally connected to the inner wall of the connecting ring one through a bearing, the end of the connecting ring three away from the connecting ring one is fixedly connected with a bottom plate, the side of the bottom plate away from the connecting ring three is fixedly connected with an outer shell, the outer wall of the bottom plate is fixedly connected with a hollow column four, and the outer wall of the hollow column four is provided with a notch two, after the coil is electrified, the magnet and the hollow column one are driven to rotate through the control of the current of the coil, through the setting of the stator mechanism, when the motor reverses, the airflow direction will automatically switch along with the reversal of the fan blade, at this time, the conical net effectively blocks the invasion of dust from the back, and the self-cleaning function is realized by using the reverse airflow, and the structure ensures the long-term smoothness of the ventilation system, so that the motor can still maintain excellent heat management performance under complex working conditions, and the environmental adaptability and operation reliability of the equipment are improved.

[0008] According to the above technical scheme, the outer wall of the hollow column one is fixedly connected with a fan blade, the end of the fan blade away from the hollow column one is fixedly connected with a hollow column three, and the outer wall of the hollow column three is rotationally connected with the hollow column four through a bearing, the rotation of the fan blade drives the flow of the gas in the equipment, and the fan blade arranged between the hollow column three and the hollow column one rotates synchronously along with the operation of the motor, guiding the external cooling airflow to penetrate the motor cavity along the preset path, rapidly cooling the coil and the magnet, compared with the passive cooling mode, the active cooling can control the core components within the safety threshold, effectively prolonging the continuous operation time of the equipment and reducing the magnetic flux decay phenomenon caused by temperature rise.

[0009] According to the above technical scheme, the outer wall of the hollow column one is fixedly connected with a lifting plate, the outer wall of the lifting plate is provided with a ventilation hole one, and the outer wall of the hollow column one is provided with a notch one, the lifting plate and the ventilation hole one divide the gas in the hollow column three, and play the role of hollow gas flow direction, through the setting of the lifting plate and the ventilation hole one, the space in the hollow column one can be divided into two parts, most of the dust is intercepted through the ventilation hole one in the air inlet stage, and part of the airflow forms a self-cleaning air curtain through the shunt design, continuously blowing the surface dust of the ventilation hole one, so that the core components can be kept clean, and the accumulation of dust on the lifting plate is avoided, the operation temperature of the motor is effectively controlled, and the equipment can work stably for a long time.

[0010] According to the above technical scheme, the end of the lifting plate away from the hollow column one is fixedly connected with a hollow column two, the inner wall of the hollow column two is fixedly connected with a connecting ring two, the inner wall of the connecting ring two is fixedly connected with the hollow column one, and the outer wall of the hollow column two is fixedly connected with the hollow column three, the hollow column two and the connecting ring two cooperate with the lifting plate to divide the gas in the hollow column three into two parts.

[0011] According to the above technical solution, a ventilation hole 2 is provided at the end of the hollow column 2 away from the lifting plate. The ventilation hole 2 penetrates the hollow column 2 and extends to the lifting plate. The ventilation hole 2 allows the gas in the hollow column 3 to circulate with the outside gas. By setting the hollow column 2, the airflow inside the equipment is divided into two parts by the lifting plate. The other part of the airflow will be discharged through the ventilation hole 2 on the hollow column 2. Since the ventilation hole 2 is located on the periphery of the entire equipment, some heat generated by passive heat dissipation will accumulate near the hollow column 2. The fast-flowing airflow can quickly carry away the temperature on the hollow column 2, further enhancing the heat dissipation function of the equipment, effectively extending the continuous operation time of the equipment, and reducing the magnetic flux attenuation phenomenon caused by temperature rise.

[0012] According to the above technical solution, a ventilation opening is provided on the side of the base plate near the coil, and a ventilation groove is provided on the inner wall of the ventilation opening. The ventilation groove penetrates the base plate and extends into the interior of the outer shell. The ventilation opening and the ventilation groove allow the gas inside the hollow column to exchange with the gas in the outer shell.

[0013] According to the above technical solution, a conical mesh is fixedly connected to the inner wall of the outer shell, and the inner wall of the conical mesh is fixedly connected to the outer shell. The conical mesh is used to filter impurities in the gas.

[0014] According to the above technical solution, the outer wall of the outer shell is provided with a second ventilation opening and a third ventilation opening. The inner wall of the outer shell is fixedly connected with an annular plate, the end of which is far from the outer shell is arc-shaped, which can play a role in the direction of gas flow inside the working outer shell.

[0015] Compared with the prior art, the present invention provides a high-efficiency and energy-saving brushless DC motor, which has the following beneficial effects:

[0016] 1. This invention uses fan blades positioned between hollow column three and hollow column one. As the motor operates, the fan blades rotate synchronously, guiding external cooling airflow through the motor cavity along a preset path to rapidly cool the coils and magnets. Compared to passive heat dissipation, active heat dissipation keeps the temperature of core components within a safe threshold, effectively extending the continuous operating time of the equipment and reducing the magnetic flux attenuation caused by temperature rise.

[0017] 2. By setting up a lifting plate and a ventilation hole, the space inside the hollow column can be divided into two parts. During the air intake stage, most of the dust is intercepted through the ventilation hole. At the same time, the diversion design allows part of the airflow to form a self-cleaning air curtain, which continuously blows away the dust accumulated on the surface of the ventilation hole. This not only keeps the core components clean, but also prevents dust from accumulating on the lifting plate, effectively controls the motor operating temperature, and enables the equipment to maintain long-term stable operation.

[0018] 3、The hollow column two is arranged, with the lifting plate, the air flow in the equipment is divided into two parts, another part of the air flow is discharged through the ventilation hole two on the hollow column two, because the position of the ventilation hole two is in the peripheral part of the whole equipment, so some heat generated by passive heat dissipation is accumulated near the hollow column two, and the fast flowing air flow can quickly take away the temperature on the hollow column two, further heat dissipation function of the equipment, effectively prolongs the continuous operation time of the equipment, and reduces the magnetic flux decay phenomenon caused by temperature rise.

[0019] 4、The stator mechanism is arranged, when the motor is reversed, the air flow direction is automatically switched with the reversal of the fan blade, the conical net effectively blocks the invasion of dust from the back, and the self-cleaning function is realized by using the reverse air flow, the structure ensures that the ventilation system is long-term unobstructed, so that the motor can still maintain excellent thermal management performance under complex working conditions, and the environmental adaptability and operation reliability of the equipment are improved. DETAILED DESCRIPTION

[0020] The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and are used to explain the application, and do not constitute a limitation on the application. In the drawings:

[0021] Figure 1 It is a schematic diagram of the overall structure of the application;

[0022] Figure 2 It is an exploded view of the overall structure of the application;

[0023] Figure 3 It is a cross-sectional view of the internal structure of the application;

[0024] Figure 4 It is an exploded view of the internal structure of the application;

[0025] Figure 5 It is a schematic diagram of the internal structure of the application;

[0026] Figure 6 It is a schematic diagram of the stator mechanism of the application;

[0027] Figure 7 It is a cross-sectional view of the stator mechanism of the application Figure 1 ;

[0028] Figure 8 It is a cross-sectional view of the stator mechanism of the application Figure 2 ;

[0029] Figure 9 It is an enlarged view of A in the application Figure 8

[0030] ​In the figure: 1, drive shaft; 101, hollow column one; 102, magnet; 103, notch one; 104, lifting plate; 105, ventilation hole one; 106, connecting ring one; 107, fan blade; 108, hollow column two; 109, hollow column three; 1010, connecting ring two; 1011, ventilation hole two; 2, stator mechanism; 201, hollow column four; 202, bottom plate; 203, coil; 204, connecting ring three; 205, notch two; 206, ventilation opening one; 207, ventilation groove; 208, ventilation opening two; 209, ventilation opening three; 2010, annular plate; 2011, conical net; 2012, shell. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments of the present application.

[0032] Examples of the described embodiments are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0033] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or integrated; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0034] Embodiment one: refer to Figures 1-5The application provides the technical scheme: a high-efficiency and energy-saving direct-current brushless motor, which comprises a driving shaft 1, the outer wall of the driving shaft 1 is fixedly connected with a hollow column one 101, the inner wall of the hollow column one 101 is fixedly connected with a magnet 102, the end, away from the driving shaft 1, of the hollow column one 101 is fixedly connected with a connecting ring one 106, the outer wall of the hollow column one 101 is fixedly connected with a fan blade 107, the end, away from the hollow column one 101, of the fan blade 107 is fixedly connected with a hollow column three 109, the outer wall of the hollow column three 109 is rotationally connected with a hollow column four 201 through a bearing, when the fan blade 107 is reversed, the rotating fan blade 107 inhales the external gas from a ventilation hole two 1011, the inhaled airflow carries away the heat on the hollow column two 108 and passes through the fan blade 107, and finally the high-temperature gas is discharged in a gap two 205, the outer wall of the hollow column one 101 is fixedly connected with a lifting plate 104, the outer wall of the lifting plate 104 is provided with a ventilation hole one 105, the outer wall of the hollow column one 101 is provided with a gap one 103, the lifting plate 104 and the ventilation hole one 105 divide the gas in the hollow column three 109, and play the role of the flowing direction of the hollow gas, the end, away from the hollow column one 101, of the lifting plate 104 is fixedly connected with a hollow column two 108, the inner wall of the hollow column two 108 is fixedly connected with a connecting ring two 1010, the inner wall of the connecting ring two 1010 is fixedly connected with the hollow column one 101, and the outer wall of the hollow column two 108 is fixedly connected with the hollow column three 109, the hollow column two 108 and the connecting ring two 1010 are matched with the lifting plate 104, so that the gas in the hollow column three 109 is divided into two parts, the end, away from the lifting plate 104, of the hollow column two 108 is provided with the ventilation hole two 1011, the ventilation hole two 1011 penetrates through the hollow column two 108 and extends to the lifting plate 104, when the motor works, with the entry of the current, the magnet 102 is driven to move through a coil 203, the moving magnet 102 drives the hollow column one 101 to rotate, the rotating hollow column one 101 drives the fan blade 107 to rotate, and then the external gas is inhaled between the hollow column three 109 and the hollow column one 101 through the rotation of the fan blade 107, when the airflow moves to the area of the lifting plate 104, part of the airflow accelerates to pass through the outside of the lifting plate 104 under the extrusion of the lifting plate 104, and the other part of the airflow passes through the inside of the lifting plate 104 through the ventilation hole one 105, the airflow passing through the inside of the lifting plate 104 is isolated from the dust outside the ventilation hole one 105 when passing through the ventilation hole one 105, and the airflow enters the inside of the motor through the gap one 103, the airflow passing through the outside of the lifting plate 104 carries away the dust accumulated on the ventilation hole one 105 under the extrusion acceleration of the lifting plate 104, and carries away the heat on the hollow column two 108 through the high-speed airflow.

[0035] Example two: please refer to Figures 6-9On the basis of embodiment one, the application provides technical solutions: the stator mechanism 2 comprises a connecting ring three 204 rotatably connected to the inner wall of the connecting ring one 106 through a bearing, the connecting ring three 204 is fixedly connected with a bottom plate 202 at one end away from the connecting ring one 106, the bottom plate 202 is fixedly connected with an outer shell 2012 at one side away from the connecting ring three 204, the outer wall of the bottom plate 202 is fixedly connected with a hollow column four 201, the outer wall of the hollow column four 201 is provided with a notch two 205, after the coil 203 is electrified, the magnet 102 and the hollow column one 101 are driven to rotate by controlling the current of the coil 203, the side of the bottom plate 202 close to the coil 203 is provided with a ventilation opening one 206, the inner wall of the ventilation opening one 206 is provided with a ventilation groove 207, the ventilation groove 207 penetrates through the bottom plate 202 and extends to the inside of the outer shell 2012, the ventilation opening one 206 and the ventilation groove 207 enable the gas in the hollow column four 201 to exchange with the gas in the outer shell 2012, with the working of the equipment, the airflow near the coil 203 will be sent into the outer shell through the ventilation opening one 206 and the ventilation groove 207, the airflow in the outer shell will discharge the high-temperature gas from the motor through the ventilation opening two 208, the inner wall of the outer shell 2012 is fixedly connected with a conical net 2011, the inner wall of the conical net 2011 is fixedly connected with the outer shell 2012, the conical net 2011 is used for filtering impurities in the gas, the outer wall of the outer shell 2012 is provided with the ventilation opening two 208, the outer wall of the outer shell 2012 is provided with a ventilation opening three 209, the inner wall of the outer shell 2012 is fixedly connected with a ring-shaped plate 2010, one end of the ring-shaped plate 2010 away from the outer shell 2012 is in the shape of a circular arc, so as to play a role of the flowing direction of the gas in the outer shell 2012, when the motor is reversed, due to the reversal of the fan blade 107, the gas will enter the outer shell from the ventilation opening two 208, part of the gas in the outer shell will be filtered through the conical net 2011, and another part of the gas will pass through the surface of the conical net 2011, and carry away the dust on the surface, and discharge the dust through the ring-shaped plate 2010 and the ventilation opening three 209, and the gas entering the equipment will be discharged from the notch one 103 between the coil 203 and the magnet 102, the gas discharged from the notch one 103 will pass through the ventilation hole one 105, and under the rotation of the fan blade 107, the high-temperature gas will be discharged from the notch two 205.

[0036] It is to be noted that, in the present text, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0037] Finally, it should be noted that the above-mentioned only constitutes preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications, equivalent replacements, improvements and the like of the technical solutions described in the foregoing embodiments can still be made. Any modifications, equivalent replacements, improvements and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A high-efficiency and energy-saving brushless DC motor, comprising a drive shaft (1), wherein a hollow column (101) is fixedly connected to the outer wall of the drive shaft (1), a magnet (102) is fixedly connected to the inner wall of the hollow column (101), and a connecting ring (106) is fixedly connected to the end of the hollow column (101) away from the drive shaft (1), characterized in that, Also includes: The stator mechanism (2) includes a connecting ring three (204) rotatably connected to the inner wall of the connecting ring one (106) via a bearing. A base plate (202) is fixedly connected to one end of the connecting ring three (204) away from the connecting ring one (106). A shell (2012) is fixedly connected to one side of the base plate (202) away from the connecting ring three (204). A hollow column four (201) is fixedly connected to the outer wall of the base plate (202). A notch two (205) is opened on the outer wall of the hollow column four (201). After the coil (203) is energized, the magnet (102) and the hollow column one (101) are rotated by controlling the current of the coil (203). A fan blade (107) is fixedly connected to the outer wall of the hollow column one (101). A hollow column three (109) is fixedly connected to the end of the fan blade (107) away from the hollow column one (101). The outer wall of the hollow column three (109) is rotatably connected to the hollow column four (201) through a bearing. The rotation of the fan blade (107) drives the flow of gas inside the equipment. A lifting plate (104) is fixedly connected to the outer wall of the hollow column one (101). A ventilation hole (105) is opened on the outer wall of the lifting plate (104), and a notch (103) is opened on the outer wall of the hollow column one (101). The lifting plate (104) and the ventilation hole (105) divert the gas inside the hollow column three (109) and play the role of the direction of hollow gas flow. The lifting plate (104) is fixedly connected to a hollow column two (108) at the end away from the hollow column one (101). A connecting ring two (1010) is fixedly connected to the inner wall of the hollow column two (108). The inner wall of the connecting ring two (1010) is fixedly connected to the hollow column one (101). The outer wall of the hollow column two (108) is fixedly connected to the hollow column three (109). With the cooperation of the lifting plate (104), the hollow column two (108) and the connecting ring two (1010) allow the gas in the hollow column three (109) to be divided into two parts. The hollow column 2 (108) has a ventilation hole 2 (1011) at the end away from the lifting plate (104). The ventilation hole 2 (1011) passes through the hollow column 2 (108) and extends to the lifting plate (104). The ventilation hole 2 (1011) allows the gas in the hollow column 3 (109) to circulate with the gas in the outside.

2. The high-efficiency and energy-saving brushless DC motor according to claim 1, characterized in that: The base plate (202) has a ventilation opening (206) on the side near the coil (203). The inner wall of the ventilation opening (206) has a ventilation groove (207). The ventilation groove (207) penetrates the base plate (202) and extends into the interior of the outer shell (2012). The ventilation opening (206) and the ventilation groove (207) allow the gas in the hollow column (201) to exchange with the gas in the outer shell (2012).

3. The high-efficiency and energy-saving brushless DC motor according to claim 2, characterized in that: A conical mesh (2011) is fixedly connected to the inner wall of the outer shell (2012). The inner wall of the conical mesh (2011) is fixedly connected to the outer shell (2012). The conical mesh (2011) is used to filter impurities in the gas.

4. The high-efficiency and energy-saving brushless DC motor according to claim 3, characterized in that: The outer wall of the outer shell (2012) is provided with a second ventilation opening (208) and a third ventilation opening (209). An annular plate (2010) is fixedly connected to the inner wall of the outer shell (2012). The end of the annular plate (2010) away from the outer shell (2012) is arc-shaped, which can play a role in the direction of gas flow inside the working outer shell (2012).

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