Direct-driven permanent magnet frequency conversion aerator

Abstract

The utility model discloses a direct drive type permanent magnet frequency conversion aerator which comprises a pontoon, an installation frame, a motor and an impeller. The motor is fixed on the mounting frame through machine legs on two sides, and comprises a shell, and a rotor and a stator which are arranged in the shell; the rotor comprises a rotating shaft and a rotor frame arranged on the rotating shaft in a sleeving mode, and magnetic steel is arranged on the inner circumferential face of the rotor frame. The stator is fixed on the stator frame and is arranged in the rotor frame; the stator frame is fixedly connected with the shell; the two ends of the rotating shaft penetrate out of the shell and are connected with the impeller shaft through couplings. The impeller is fixed on the impeller shaft; and the machine legs are detachably connected with the mounting bosses on the two sides of the shell. According to the aerator disclosed by the utility model, the machine legs which are detachably connected are arranged on the motor, so that the machine legs with the corresponding center height can be selected according to the outer diameter of the impeller in the actual use process, at the moment, only one motor is needed to adapt to different types of impellers, the application range is wide, and the use cost of a user is saved.

Description

Technical Field

[0001] This utility model relates to the field of aerator technology, specifically to a direct-drive permanent magnet variable frequency aerator. Background Technology

[0002] In aquaculture, aerators are crucial equipment, primarily used to increase dissolved oxygen levels in the water to prevent oxygen deficiency. They also inhibit the growth of anaerobic bacteria, preventing water quality deterioration that could threaten the survival of fish and shrimp. Aerators include impeller aerators, paddlewheel aerators, spray aerators, air-filled aerators, suction aerators, and vortex aerators. Among these, paddlewheel aerators offer excellent oxygenation and promote water flow, making them suitable for various water types. Current paddlewheel aerators mainly consist of a float, mounting frame, motor, and impeller. During operation, the motor shaft is connected to the impeller shaft via couplings at both ends, driving the impeller to rotate and agitate the water, generating a large amount of water spray that dissolves air and forms dissolved oxygen. Currently, the motors used in waterwheel aerators on the market are usually internal rotor drive structures. Motors with this structure are large in size and heavy in weight. When the motor is in use, it is fixed on the mounting frame, which is in turn fixed on the floating vessel. This requires thickening the mounting frame and correspondingly increasing the volume of the floating vessel. As a result, assembling the waterwheel aerator is more laborious and also increases the manufacturing cost of the waterwheel aerator. Utility Model Content

[0003] To overcome the aforementioned problems in the existing technology, this utility model provides a direct-drive permanent magnet variable frequency aerator. This direct-drive permanent magnet variable frequency aerator includes a floating platform, a mounting frame, a motor, and an impeller. The components are connected using a specific structure, making installation very convenient for users. The motor is fixed to the mounting frame via feet on both sides, and these feet are detachably connected to the motor housing. This allows for the selection of feet with the corresponding center height based on the impeller's outer diameter during actual use. In this case, only one type of motor is needed to adapt to different impeller models, resulting in a wide range of applications and reduced user operating costs. Furthermore, the motor in this aerator has its stator located inside the rotor frame, making the overall structure compact and lightweight, thus reducing the overall size and weight of the aerator, lowering production and transportation costs. This type of motor also has high operating efficiency, further reducing user electricity expenses and offering good economic benefits. (External rotor structural design)

[0004] The technical solution of this application is as follows: a direct-drive permanent magnet variable frequency aerator, including a floating platform, a mounting frame, a motor, and an impeller; the mounting frame is fixed on the floating platform; the motor is fixed to the mounting frame via feet on both sides; the motor includes a housing, and a rotor and a stator disposed within the housing; the rotor includes a rotating shaft and a rotor frame sleeved on the rotating shaft; magnets are provided on the inner circumferential surface of the rotor frame; the stator is fixed on the stator frame and disposed inside the rotor frame; the stator frame is fixedly connected to the housing; both ends of the rotating shaft extend out from the housing and are connected to the impeller shaft via couplings; the impeller is fixed on the impeller shaft; a mounting boss is provided on each side of the housing, and the feet are detachably connected to the mounting boss.

[0005] Compared with existing technologies, the direct-drive permanent magnet variable frequency aerator of this application includes a floating platform, a mounting frame, a motor, and an impeller. The motor is fixed to the mounting frame via feet on both sides, and the feet are detachably connected to the motor housing. This allows for the selection of feet with the corresponding center height based on the outer diameter of the impeller during actual use. In this case, only one type of motor is needed to adapt to different impeller models (traditional aerators require different motors for different impellers), resulting in a wide range of applications and reduced user costs. Furthermore, the motor of the aerator of this application adopts an external rotor structure, with the rotor frame mounted on the motor shaft, driving the motor shaft to rotate. The stator is located inside the rotor frame. This external rotor design reduces the outer diameter of the stator, making the motor structure more compact and the overall weight lighter, thus reducing the size and weight of the aerator, facilitating user installation, reducing production and transportation costs, and offering good economic efficiency. Moreover, this type of motor has high operating efficiency, which helps reduce users' electricity expenses.

[0006] As an optimization, in the aforementioned direct-drive permanent magnet variable frequency aerator, the impeller shaft is fixed to the mounting frame via a bearing housing. The bearing housing supports the impeller shaft, ensuring its stability during rotation. Furthermore, the bearing housing includes a base fixed to the mounting frame and a top cover on top of the base; a rubber bearing sleeve is provided between the top cover and the base, and the rubber bearing sleeve is fitted onto the impeller shaft. Dividing the bearing housing into multiple detachable parts facilitates the installation and fixation of the impeller shaft.

[0007] As an optimization, in the aforementioned direct-drive permanent magnet variable frequency aerator, the coupling includes a connecting component and mounting sleeves A and B fixed on both sides of the connecting component; mounting sleeve A is fixed to the end of the rotating shaft, and mounting sleeve B is fixed to the end of the impeller shaft. The coupling with the above-described structure is simple in design and easy to manufacture; moreover, it facilitates connection with the impeller shaft and the rotating shaft.

[0008] As an optimization, in the aforementioned direct-drive permanent magnet variable frequency aerator, the mounting feet are fitted onto the mounting boss and secured with screws. The screw connection between the mounting feet and the mounting boss facilitates easy assembly and disassembly, making it simpler and more convenient to replace feet with different center heights, thus reducing implementation difficulty. Furthermore, the outer circumferential surface of the mounting boss has external splines, and correspondingly, the inner circumferential surface of the mounting feet has internal splines; the mounting feet and the mounting boss are positioned by the interaction of the internal and external splines. Furthermore, the center height of the mounting feet can be 50mm or 130mm. In aquaculture, paddlewheel aerators mainly use impellers with outer diameters of 450mm and 680mm; a 50mm center height mounting foot is suitable for a 450mm outer diameter impeller, and a 130mm center height mounting foot is suitable for a 680mm outer diameter impeller.

[0009] As an optimization, in the aforementioned direct-drive permanent magnet variable frequency aerator, the mounting frame includes a rectangular frame; the four corners of the rectangular frame are respectively fixed to the floating vessel; two crossbars are provided in the middle of the rectangular frame for mounting two machine feet. The mounting frame adopts a frame structure, which can save manufacturing materials and reduce production costs while ensuring the connection is firm.

[0010] As an optimization, in the aforementioned direct-drive permanent magnet variable frequency aerator, a floating platform is provided on each side of the motor, and an impeller is provided on each side of each floating platform.

[0011] Furthermore, the impeller includes a hub and a set of blades spaced apart on the outer circumferential surface of the hub; the hub is fitted onto the impeller shaft and secured with bolts. In this configuration, the connection structure is simple and easy to implement. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the direct-drive permanent magnet variable frequency aerator in Embodiment 1 of this application;

[0013] Figure 2 yes Figure 1 A schematic diagram of the structure of an aerator when the impeller is removed;

[0014] Figure 3 This is a cross-sectional view of the motor in Embodiment 1 of this application;

[0015] Figure 4 This is a structural schematic diagram of the motor (with its feet removed) in this application;

[0016] Figure 5 This is a schematic diagram of the structure of the foot in Embodiment 1 of this application;

[0017] Figure 6 This is a schematic diagram of the bearing housing in this application;

[0018] Figure 7 yes Figure 6 A schematic diagram of the bearing housing after the top cover has been removed;

[0019] Figure 8 This is a schematic diagram of the coupling in this application;

[0020] Figure 9 This is a schematic diagram of the direct-drive permanent magnet variable frequency aerator in Embodiment 2 of this application.

[0021] The labels in the attached diagram are as follows: 1-Floating vessel; 2-Mounting frame; 21-Rectangular frame; 22-Crossbar; 3-Motor; 31-Housing; 32-Stator; 33-Shaft; 34-Rotor frame; 35-Magnet; 36-Stator frame; 37-Foot; 371-Internal spline; 38-Mounting boss; 381-External spline; 4-Impeller; 41-Hub; 42-Blade; 5-Coupling; 51-Connecting piece; 52-Mounting sleeve A; 53-Mounting sleeve B; 6-Impeller shaft; 7-Bearing housing; 71-Base; 72-Top cover; 73-Rubber bearing sleeve. Detailed Implementation

[0022] The present application will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present application.

[0023] Example 1:

[0024] See Figures 1 to 3 The direct-drive permanent magnet variable frequency aerator in this embodiment includes a floating vessel 1, a mounting frame 2, a motor 3, and an impeller 4. The mounting frame 2 is fixed to the floating vessel 1. The motor 3 is fixed to the mounting frame 2 via feet 37 on both sides. The motor 3 includes a housing 31, and a rotor and a stator 32 disposed within the housing 31. The rotor includes a rotating shaft 33 and a rotor frame 34 sleeved on the rotating shaft 33. Magnets 35 are provided on the inner circumferential surface of the rotor frame 34. The stator 32 is fixed to the stator frame 36 and disposed inside the rotor frame 34. The stator frame 36 is fixedly connected to the housing 31. Both ends of the rotating shaft 33 extend out from the housing 31 and are connected to the impeller shaft 6 via a coupling 5. The impeller 4 is fixed to the impeller shaft 6. A mounting boss 38 is provided on each side of the housing 31, and the feet 37 are detachably connected to the mounting boss 38.

[0025] See Figure 6 and Figure 7In this embodiment, the impeller shaft 6 is fixed to the mounting frame 2 via a bearing seat 7. The bearing seat 7 provides support for the impeller shaft 6, ensuring its stability during rotation. Further, the bearing seat 7 includes a base 71 fixed to the mounting frame 2 and a top cover 72 on top of the base 71; a rubber bearing sleeve 73 is provided between the top cover 72 and the base 71, and the rubber bearing sleeve 73 is fitted onto the impeller shaft 6. Dividing the bearing seat 7 into multiple detachable parts facilitates the installation and fixation of the impeller shaft 6. During assembly, the rubber bearing sleeve 73 can be first fitted onto the impeller shaft 6, and the impeller 4 can be fixed to the impeller shaft 6. Then, the rubber bearing sleeve 73 can be placed on the base 71, the coupling 5 can be installed, and finally, the top cover 72 can be placed on the rubber bearing sleeve 73, and bolts can be used to tighten and fix the top cover 72 to the base 71. The operation is very convenient. Furthermore, a limiting block is provided on the outer side of the rubber bearing sleeve 73, and correspondingly, limiting grooves are provided on the base 71 and the top cover 72 to limit the rubber bearing sleeve 73.

[0026] See Figure 8 In this embodiment, the coupling 5 includes a connecting member 51, and mounting sleeves A 52 and B 53 fixed to both sides of the connecting member 51; mounting sleeve A 52 is fixed to the end of the rotating shaft 33, and mounting sleeve B 53 is fixed to the end of the impeller shaft 6. The coupling 5, with the above-described structure, is simple in design and easy to manufacture; moreover, it facilitates connection with the impeller shaft 6 and the rotating shaft 33. Mounting sleeve A 52 is fixed to the connecting member 51 and the rotating shaft 33 by bolts; mounting sleeve B 53 is fixed to the connecting member 51 and the impeller shaft 6 by bolts.

[0027] See Figure 4 and Figure 5 In this embodiment, the foot 37 is sleeved on the mounting boss 38 and fixed by screws. The foot 37 and the mounting boss 38 are connected and fixed by screws, which is easy to disassemble and assemble, making it simpler and more convenient to replace the foot 37 with different center heights, and the implementation difficulty is low. Furthermore, the outer peripheral surface of the mounting boss 38 is provided with an external spline 381, and correspondingly, the inner peripheral surface of the foot 37 is provided with an internal spline 371; the foot 37 and the mounting boss 38 are limited by the cooperation of the internal spline 371 and the external spline 381.

[0028] In this embodiment, the mounting frame 2 includes a rectangular frame 21; the four corners of the rectangular frame 21 are respectively fixed to the floating vessel 1; two crossbars 22 are provided in the middle of the rectangular frame 21 for mounting two machine feet 37. The mounting frame 2 adopts a frame structure, which can save manufacturing materials and reduce production costs while ensuring the connection is firm.

[0029] In this embodiment, the center height of the machine foot 37 is 130mm, corresponding to the outer diameter of the impeller 4 being 680mm. Furthermore, a floating platform 1 is provided on each side of the motor 3, and each floating platform 1 has one impeller 4 on the side closer to the motor 3 and two impellers 4 on the side farther from the motor 3. Each impeller 4 includes a hub 41 and a set of blades 42 spaced apart on the outer circumference of the hub 41; the hub 41 is fitted onto the impeller shaft 6 and secured with bolts. This connection structure is simple and easy to implement.

[0030] Example 2:

[0031] See Figure 9 Unlike Embodiment 1, in this embodiment, the center height of the machine foot 37 is 50mm, and the corresponding outer diameter of the impeller 4 is 450mm. Furthermore, a floating platform 1 is provided on each side of the motor 3, and an impeller 4 is provided on each side of each floating platform 1.

[0032] The foregoing general description of the utility model and its specific embodiments should not be construed as limiting the technical solution of the utility model. Those skilled in the art, based on the disclosure of this application, can add, reduce, or combine the disclosed technical features in the foregoing general description and / or specific embodiments (including examples) without departing from the constituent elements of the utility model, to form other technical solutions within the protection scope of this application.

Claims

1. A direct-drive permanent magnet variable frequency aerator, comprising a floating platform (1), a mounting frame (2), a motor (3), and an impeller (4); the mounting frame (2) is fixed to the floating platform (1); characterized in that: The motor (3) is fixed to the mounting bracket (2) by the machine feet (37) on both sides; the motor (3) includes a housing (31), and a rotor and a stator (32) disposed in the housing (31); the rotor includes a rotating shaft (33) and a rotor frame (34) sleeved on the rotating shaft (33); magnets (35) are provided on the inner circumferential surface of the rotor frame (34); the stator (32) is fixed on the stator frame (36) and disposed inside the rotor frame (34); the stator frame (36) is fixedly connected to the housing (31); the two ends of the rotating shaft (33) respectively pass through the housing (31) and are connected to the impeller shaft (6) through the coupling (5); the impeller (4) is fixed on the impeller shaft (6); a mounting boss (38) is provided on each side of the housing (31), and the machine feet (37) are detachably connected to the mounting boss (38).

2. The direct-drive permanent magnet variable frequency aerator according to claim 1, characterized in that: The impeller shaft (6) is fixed to the mounting bracket (2) by a bearing seat (7).

3. The direct-drive permanent magnet variable frequency aerator according to claim 2, characterized in that: The bearing housing (7) includes a base (71) fixed on the mounting bracket (2) and a top cover (72) on the top of the base (71); a rubber bearing sleeve (73) is provided between the top cover (72) and the base (71), and the rubber bearing sleeve (73) is sleeved on the impeller shaft (6).

4. The direct-drive permanent magnet variable frequency aerator according to claim 1, characterized in that: The coupling (5) includes a connector (51) and an A mounting sleeve (52) and a B mounting sleeve (53) fixed on both sides of the connector (51); the A mounting sleeve (52) is fixed to the end of the rotating shaft (33) and the B mounting sleeve (53) is fixed to the end of the impeller shaft (6).

5. The direct-drive permanent magnet variable frequency aerator according to claim 1, characterized in that: The foot (37) is fitted over the mounting boss (38) and secured with screws.

6. The direct-drive permanent magnet variable frequency aerator according to claim 5, characterized in that: The mounting boss (38) has an external spline (381) on its outer peripheral surface, and correspondingly, the foot (37) has an internal spline (371) on its inner peripheral surface; the foot (37) and the mounting boss (38) form a limit by the mutual cooperation of the internal spline (371) and the external spline (381).

7. The direct-drive permanent magnet variable frequency aerator according to claim 6, characterized in that: The center height of the foot (37) is 50mm or 130mm.

8. The direct-drive permanent magnet variable frequency aerator according to claim 1, characterized in that: The mounting frame (2) includes a rectangular frame (21); the four corners of the rectangular frame (21) are fixed to the floating vessel (1); the middle of the rectangular frame (21) is provided with two crossbars (22) for mounting two machine feet (37).

9. The direct-drive permanent magnet variable frequency aerator according to claim 1, characterized in that: Each of the motors (3) has a floating boat (1) on each side, and each floating boat (1) has an impeller (4) on each side.

10. The direct-drive permanent magnet variable frequency aerator according to claim 9, characterized in that: The impeller (4) includes a hub (41) and a set of blades (42) spaced apart on the outer circumferential surface of the hub (41); the hub (41) is fitted onto the impeller shaft (6) and locked in place by bolts.

Images