Novel motor for driving fishpond aerator

Abstract

The utility model discloses a novel motor for driving a fishpond aerator, which comprises a stator, a rotor, a motor casing and a rotating shaft and comprises the motor casing, an end cover is fixedly mounted at the bottom end of the motor casing, a transmission reduction gearbox is arranged below the end cover, an impeller is fixedly mounted at the output end of the transmission reduction gearbox, and the stator is mounted inside the motor casing. An inner circle stator groove coil of the stator adopts a low-harmonic sine concentric unequal-turn winding uniform distribution structure, a rotor is installed on an inner ring of the stator, sixteen starting cage strip aluminum casting grooves are formed in the end portion of an outer circle of the rotor, and a plurality of magnetic isolation bridges are arranged between the bottom end of each starting cage strip aluminum casting groove and the top end of a V-shaped groove. The stator coil of the motor adopts a low-harmonic sine concentric unequal-turn winding structure, so that a sine wave permanent magnet motor air-gap magnetic field is realized, the higher harmonic loss of the magnetic field is effectively reduced, the starting performance and the operation vibration of the motor are improved, the efficiency of the motor is improved, and the motor has the characteristics of high efficiency and high power factor and plays a role in saving energy and electricity.

Description

Technical Field

[0001] The utility model relates to the technical field of aerators, in particular to a new type of motor for driving a fish pond aerator. Background Technique

[0002] An aerator is a machine commonly used in fishery aquaculture. The impeller aerator has the functions of agitating water, increasing oxygen, mixing, and aerating. These functions are completed simultaneously during the operation of the machine. Its main function is to increase the oxygen content in the water to ensure that aquatic animals in the water do not lack oxygen. At the same time, it can also inhibit the growth of anaerobic bacteria in the water, desorb harmful gases in the water and discharge them, prevent the deterioration of the pond water and threaten the living environment of aquatic animals. In addition to increasing oxygen, the aerator also promotes the growth and reproduction of phytoplankton and improves the primary productivity of the pond.

[0003] When the aerator is working, a motor is needed for driving. The existing asynchronous starting permanent magnet motor includes a rotor motor housing, permanent magnets, and bar slots. There are multiple permanent magnets evenly distributed radially on the rotor motor housing. There are aluminum bars at the bar slots. When the motor starts, the aluminum bars are coupled with the stator rotating magnetic field to complete the starting process, and then the permanent magnet magnetic field is coupled with the stator magnetic field to realize the normal operation of the motor. Among them, the bar slot structure on the rotor adopts the same structure as that of an asynchronous motor. The bar slots are evenly distributed at the edge of the rotor body and have the same shape and size. This structure makes the air-gap magnetic field generated by the permanent magnets a square-wave magnetic field. When this method is applied to an asynchronous starting permanent magnet synchronous motor, the magnetic field contains a large amount of harmonics. The harmonic magnetic field generates high-order harmonic iron losses during the operation of the motor, and at the same time generates additional torque, causing motor vibration and noise, and the motor efficiency also decreases accordingly. Therefore, it is necessary to provide a new type of motor for driving a fish pond aerator to solve the above technical problems. Content of the Utility Model

[0004] To solve the above technical problems, the utility model provides a new type of motor for driving a fish pond aerator to solve the problems of high-order harmonic iron losses generated during the operation of the motor, additional torque causing motor vibration and noise, and the decrease of motor efficiency.

[0005] A new type of motor for driving a fish pond aerator provided by the utility model includes a motor housing: a end cover is fixedly installed at the bottom end of the motor housing, a transmission reduction gearbox is arranged below the end cover, an impeller is fixedly installed at the output end of the transmission reduction gearbox, a stator is installed inside the motor housing, the inner stator slot coils of the stator adopt a low-harmonic sine concentric unequal-turn winding uniform distribution structure, a rotor is installed inside the inner circle of the stator, sixteen starting cage bar cast aluminum slots are arranged on the outer surface of the rotor, a plurality of magnetic isolation bridges are arranged between the bottom end of each starting cage bar cast aluminum slot and the top end of the V-shaped slot respectively, a plurality of V-shaped slots are opened inside the rotor, a plurality of neodymium iron boron permanent magnets are arranged inside each V-shaped slot, the inner coil slots of the stator adopt low-harmonic sine concentric unequal-turn winding structure data, an output shaft is installed inside the inner circle of the rotor, a first sealing bearing is fixedly inlaid on the bottom surface of the end cover, and the bottom end of the output shaft penetrates through the first sealing bearing and extends below the first sealing bearing.

[0006] Preferably, a second sealing bearing is fixedly inlaid on the upper surface of the motor housing, the top end of the output shaft penetrates through the second sealing bearing and extends above the second sealing bearing, and a heat dissipation fin is fixedly installed at the top end of the output shaft.

[0007] Preferably, a threaded connection ring is fixedly connected to the outer surface of the motor housing, a protective cover is threadedly connected to the outer surface of the threaded connection ring, a plurality of heat dissipation holes are opened on the upper surface of the protective cover, and two groups of fixing holes are opened on the bottom surface of the end cover, and threads are opened on the inner walls of the two groups of fixing holes.

[0008] Preferably, a control box is fixedly installed on the outer surface of the motor housing, and heat dissipation fins arranged in a circular arrangement are fixedly connected to the outer surface of the motor housing.

[0009] Preferably, a magnetic isolation bridge is arranged between the bottom end of the motor rotor cast aluminum slot and the V-shaped slot, the diameter width of the magnetic isolation bridge is 1-2 mm, and the angle of each V-shaped slot is 150 degrees.

[0010] Preferably, a plurality of connecting rods are fixedly connected to the outer surface of the impeller, a connecting head is fixedly connected to one end of each connecting rod away from each other, and a floating ball is fixedly connected to the bottom end of each connecting head.

[0011] Compared with the related art, a new type of motor for driving a fish pond aerator provided by the utility model has the following beneficial effects:

[0012] The utility model is a highly efficient self-starting permanent magnet synchronous aerator motor driven by an aerator specifically designed for fishery fish ponds in response to the country's call for energy conservation and emission reduction. It can save more than 30% of electricity. The V-shaped grooves on the rotor are radially distributed, and the permanent magnets are arranged in an in-built magnetic circuit structure in the V-shaped grooves, with the magnetic steel grooves distributed in a V-shape. It combines the advantages of a series rotor structure and a parallel rotor structure. More permanent magnets can be installed on the rotor assembly than in the series and parallel magnetic circuit structures. The no-load leakage magnetic coefficient is small, improving the integrity and mechanical strength of the rotor assembly. It can change the motor magnetic field, making the magnetic field of the V-shaped angle stronger than that of the horizontal shape. Without a larger current, a greater driving force can be generated, making the motor run faster. It has characteristics such as a high power factor and high efficiency, achieving the effect of energy conservation and power saving. The stator coil uses a low-harmonic sine winding to achieve a sine-wave permanent magnet motor air-gap magnetic field. The sine-wave magnetic field makes the motor start-up performance better, reduces the running vibration and noise, improves the motor efficiency, and plays a role in energy conservation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 FIG. is a three-dimensional structure schematic diagram of the front view of the utility model;

[0014] Figure 2 FIG. is a cross-sectional view of the bottom view of the motor housing of the utility model;

[0015] Figure 3 FIG. is a cross-sectional view of the front view of the motor housing of the utility model;

[0016] Figure 4 FIG. is a three-dimensional structure schematic diagram of the bottom view of the motor housing of the utility model.

[0017] Reference numerals in the figures: 1, motor housing; 2, end cover; 3, fixing hole; 4, impeller; 5, connecting rod; 6, connector; 7, floating ball; 8, rotor; 9, stator; 10, output shaft; 11, first sealing bearing; 12, heat sink; 13, threaded connection ring; 14, protective cover; 15, heat dissipation hole; 16, heat dissipation fin; 17, second sealing bearing; 18, control box; 19, V-shaped groove; 20, neodymium iron boron permanent magnet; 21, magnetic isolation bridge; 22, transmission reduction box; 23, starting cage bar cast aluminum groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following further describes the utility model in conjunction with the drawings and embodiments.

[0019] Please refer to Figures 1 to 4, a new type of motor for driving a fish pond aerator, including a motor housing 1: a end cover 2 is fixedly installed at the bottom end of the motor housing 1, a transmission reduction gearbox 22 is provided below the end cover 2, an impeller 4 is fixedly installed at the output end of the transmission reduction gearbox 22, a stator 9 is installed inside the motor housing 1, the inner stator slot coil of the stator 9 adopts a low-harmonic sine concentric unequal-turn winding uniform distribution structure, a rotor 8 is installed inside the inner circle of the stator 9, sixteen starting cage bar cast aluminum slots 23 are provided at the outer circle end of the rotor 8, and a plurality of magnetic isolation bridges 21 are provided between the bottom end of each starting cage bar cast aluminum slot 23 and the top end of the V-shaped slot 19 respectively. A plurality of V-shaped slots 19 are formed inside the rotor 8, and a plurality of neodymium iron boron permanent magnets 20 are provided inside each V-shaped slot 19. A plurality of cast aluminum squirrel cage starting cage bars and non-magnetic magnetic steel pressing plates are provided at the top of the rotor outer circle. The stator assembly includes a stator core and a stator coil coaxially laminated by silicon steel sheets. The internal coil slot coil of the stator 9 adopts a low-harmonic sine concentric unequal-turn winding structure data. An output shaft 10 is installed inside the inner circle of the rotor 8. A first sealing bearing 11 is fixedly inlaid on the bottom surface of the end cover 2. The bottom end of the output shaft 10 penetrates through the first sealing bearing 11 and extends below the first sealing bearing 11. Through the V-shaped slots 19 provided in the rotor 8 and by placing the magnetic steel sheets 20 inside the V-shaped slots 19, the magnetic field of the V-shaped angle will be stronger than that of the horizontal type, and greater power can be generated.

[0020] In the specific implementation process, a second sealing bearing 17 is fixedly inlaid on the upper surface of the motor housing 1. The top end of the output shaft 10 penetrates through the second sealing bearing 17 and extends above the second sealing bearing 17. A heat dissipation blade 16 is fixedly installed at the top end of the output shaft 10. A threaded connection ring 13 is fixedly connected to the outer surface of the motor housing 1. A protective cover 14 is threadedly connected to the outer surface of the threaded connection ring 13. A plurality of heat dissipation holes 15 are provided on the upper surface of the protective cover 14. Through the setting of the heat dissipation blade 16, the motor can be assisted in heat dissipation. By using the cooperation of the protective cover 14 and the heat dissipation holes 15, the heat dissipation blade 16 can be protected, and the potential safety hazards during the operation of the motor can be reduced.

[0021] Preferably, a control box 18 is fixedly installed on the outer surface of the motor housing 1. A heat dissipation fin 12 arranged in a ring shape is fixedly connected to the outer surface of the motor housing 1. Two groups of fixing holes 3 are provided on the bottom surface of the end cover 2, and threads are provided on the inner walls of the two groups of fixing holes 3. A plurality of connecting rods 5 are fixedly connected to the outer surface of the impeller 4. One end of each connecting rod 5 away from each other is fixedly connected with a connecting head 6. A floating ball 7 is fixedly connected to the bottom end of each connecting head 6. A magnetic isolation bridge 21 is provided between the bottom end of the motor rotor cast aluminum slot 23 and the top end of the V-shaped slot. The diameter width of the magnetic isolation bridge 21 is 1-2 mm, and the angle of each V-shaped slot 19 is 150 degrees. The motor can be controlled for wiring through the control box 18. The heat dissipation fin 12 is beneficial to the heat inside the motor housing 1 to be dissipated outward. By using the cooperation of the connecting rods 5, the connecting heads 6 and the floating balls 7, the impeller 4 and the motor can be supported.

[0022] The working principle of a new type of motor for driving a fishpond aerator provided by the present utility model is as follows: The start and operation of a permanent magnet synchronous motor are formed by the interaction of magnetic fields generated by the stator winding, the rotor squirrel-cage winding, and the permanent magnet. When the motor is stationary, a three-phase symmetrical current is applied to the stator winding to generate a rotating magnetic field of the stator 9. The rotating magnetic field of the stator 9 rotates relative to the rotor 8, generating a current in the cage winding to form a rotating magnetic field of the rotor 8. The asynchronous torque generated by the interaction between the rotating magnetic field of the stator 9 and the rotating magnetic field of the rotor 8 causes the rotor 8 to start accelerating from a stationary state. During this process, the rotational speeds of the permanent magnet magnetic field of the rotor 8 and the rotating magnetic field of the stator 9 are different, generating an alternating torque. When the rotor 8 accelerates to a speed close to the synchronous speed, the rotational speeds of the permanent magnet magnetic field of the rotor 8 and the rotating magnetic field of the stator 9 are close to equal, and the speed of the rotating magnetic field of the stator 9 is slightly greater than that of the permanent magnet magnetic field of the rotor 8. Their interaction generates a torque to pull the rotor 8 into the synchronous operation state. In the synchronous operation state, no current is generated in the rotor winding. At this time, only the permanent magnet on the rotor 8 generates a magnetic field, which interacts with the rotating magnetic field of the stator 9 to generate a driving torque.

[0023] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0024] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present utility model.

Claims

1. A novel motor for driving a fishpond aerator, characterized in that, It includes a motor housing (1): A end cover (2) is fixedly installed at the bottom end of the motor housing (1). A transmission reduction gearbox (22) is provided below the end cover (2). An impeller (4) is fixedly installed at the output end of the transmission reduction gearbox (22). A stator (9) is installed inside the motor housing (1). The inner circle stator slot coils of the stator (9) adopt a low harmonic sine concentric unequal turn winding evenly distributed structure. A rotor (8) is installed inside the inner circle of the stator (9). Sixteen starting cage bar cast aluminum slots (23) are provided at the outer circle end of the rotor (8). A plurality of magnetic isolation bridges (21) are provided between the bottom end of each starting cage bar cast aluminum slot (23) and the top end of the V-shaped slot (19). A plurality of V-shaped slots (19) are opened inside the rotor (8). A plurality of neodymium iron boron permanent magnets (20) are provided inside each V-shaped slot (19). An output shaft (10) is installed inside the inner circle of the rotor (8). A first sealing bearing (11) is fixedly inlaid on the bottom surface of the end cover (2). The bottom end of the output shaft (10) penetrates through the first sealing bearing (11) and extends below the first sealing bearing (11).

2. A novel motor for driving a fishpond aerator according to claim 1, characterized in that, A second sealing bearing (17) is fixedly inlaid on the upper surface of the motor housing (1). The top end of the output shaft (10) penetrates through the second sealing bearing (17) and extends above the second sealing bearing (17). A heat dissipation fin (16) is fixedly installed at the top end of the output shaft (10).

3. A novel motor for driving a fish pond aerator according to claim 1, characterized in that, A threaded connection ring (13) is fixedly connected to the outer surface of the motor housing (1). A protective cover (14) is threadedly connected to the outer surface of the threaded connection ring (13). A plurality of heat dissipation holes (15) are opened on the upper surface of the protective cover (14). Two groups of fixing holes (3) are opened on the bottom surface of the end cover (2). Threads are provided on the inner walls of the two groups of fixing holes (3).

4. A novel motor for driving a fishpond aerator according to claim 1, characterized in that, A control box (18) is fixedly installed on the outer surface of the motor housing (1). Heat dissipation fins (12) arranged in a ring are fixedly connected to the outer surface of the motor housing (1).

5. A novel motor for driving a fishpond aerator according to claim 1, characterized in that, The diameter width of the magnetic isolation bridge (21) is 1 - 2 mm. The angle of each V-shaped slot (19) is 150 degrees.

6. A novel motor for driving a fishpond aerator according to claim 1, characterized in that, A plurality of connecting rods (5) are fixedly connected to the outer surface of the impeller (4). The mutually remote ends of each connecting rod (5) are fixedly connected to a connecting head (6). A floating ball (7) is fixedly connected to the bottom end of each connecting head (6).

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