Single-row air suction type seed fan

Abstract

The utility model provides a single line air suction type seed sowing fan, including zinc plate upper shell, fan blade, air guide wheel, motor body shell, double balanced axle, stator, rotor cover, PCB board, magnet cover, white conductor, blue conductor and yellow conductor, air guide wheel is nested in galvanized sheet upper shell inside lower end through a plurality of screws, fan blade is encapsulated between zinc plate upper shell and air guide wheel, and fan blade is fixed in double balanced axle outside upper end through fan blade flange nut and gasket, this design has solved the problem that the existing seed sowing fan often exists low efficiency, easy to block, maintenance frequently, short life etc. For example, the traditional fan motor is not high in efficiency, dust and moisture are easy to enter the bearing and cause failure, and the problems of insufficient air volume and air pressure, the single line air suction type seed sowing fan structure compact, high efficiency of the utility model design is applicable to various brand seed sowing device, has improved the reliability and economy of sowing operation.

Description

Technical Field

[0001] This utility model is a single-row air-suction seed metering fan, belonging to the field of agricultural sowing technology. Background Technology

[0002] In agricultural sowing operations, air suction seed metering devices are widely used in precision sowing. They use a fan to generate negative pressure to adsorb seeds and achieve single-seed sowing.

[0003] Existing seed metering fans often suffer from problems such as low efficiency, easy clogging, frequent maintenance, and short lifespan. For example, traditional fan motors are inefficient, dust and moisture easily enter the bearings leading to malfunctions, and insufficient airflow and pressure affect seed metering accuracy and reliability. Therefore, there is an urgent need for a single-row air-suction seed metering fan to solve the aforementioned problems. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a single-row air suction seed metering fan to solve the problems mentioned in the background technology. The single-row air suction seed metering fan designed in this utility model has a compact structure, high efficiency, and is suitable for various brands of seed metering devices, thereby improving the reliability and economy of sowing operations.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: A single-row air-suction seed fan includes a zinc plate shell, a fan blade, a guide wheel, a motor housing, a double-balance shaft, a stator, a rotor sleeve, a PCB board, a magnet sleeve, white wires, blue wires, and yellow wires. The guide wheel is nested inside the lower end of the zinc plate shell by multiple screws. The fan blade is encapsulated between the zinc plate shell and the guide wheel, and is fixed to the upper end of the double-balance shaft by a fan blade flange nut and a gasket. The upper and lower ends of the motor housing are respectively precision-installed with a first end cover and a second end cover. A first bearing and a second bearing are respectively installed inside the first end cover and the second end cover. The two ends of the double-balance shaft are supported by the first bearing and the second bearing, respectively. The stator is insulated and fixed inside the motor housing by an injection-molded wire frame and a wire frame with columns. The rotor sleeve is interference-fitted onto the outside of the double-balance shaft, and the rotor sleeve is concentrically arranged with the stator. The magnet sleeve is embedded in the rotor sleeve. A balance copper ring is press-fitted to the end of the rotor sleeve. The PCB board... The board is fixed inside the motor housing by insulating pads, and the PCB board solder points are connected to the corresponding solder points on the wire frame by welding. One end of the white, blue and yellow wires is soldered to the PCB board, and the other end of the white, blue and yellow wires is led out through the wire guard post as the three-phase input lines of the motor, which are connected to the banana plug male connector.

[0006] Furthermore, the zinc plate outer shell has a drainage outlet and a fan hood opening on its side.

[0007] A blade partition is provided between the fan blade and the guide wheel, and the blade partition is sleeved outside the double balance shaft. The fan blade is a centrifugal aluminum alloy impeller.

[0008] A wave spring is provided at the connection between the second end cover and the second bearing, and a stainless steel sleeve is press-fitted into the center hole of the second end cover.

[0009] The stator is wound with enameled wire, and the ends of the enameled wire are soldered to the wire frame with columns.

[0010] The magnet sleeve is made of high-temperature resistant bonded neodymium iron boron.

[0011] A sealing film is provided at the connection between the first end cap and the first bearing, and a sealing film is also provided at the connection between the second end cap and the second bearing.

[0012] The beneficial effects of this utility model are as follows: This utility model provides a single-row air-suction seed metering fan. Because it incorporates a galvanized steel outer shell, fan blades, guide vanes, fan blade spacers, a first end cover, a first bearing, a motor housing, a second bearing, a wave spring, a second end cover, sealing sheets, a stainless steel sleeve, a double balance shaft, a rotor sleeve, a magnet sleeve, a balance copper ring, and a stator, its structure is reasonable. Its motor efficiency reaches 92%. It uses a 0.35mm non-oriented silicon steel stator and a high-temperature resistant bonded neodymium iron boron rotor, resulting in rapid heat dissipation and stable operation. Furthermore, the optimized fan blade design achieves an air volume of 120m³ / h, an air pressure of 10kPa, an efficiency of 45%, and a speed of 24000rpm. It exhibits low vibration and low noise, making it suitable for various seed metering devices. Additionally, the bearing seal and drainage port design extend its lifespan, requiring no maintenance for life and achieving a lifespan of up to 20,000 hours. Moreover, the overall structure is lightweight and robust, employing aluminum alloy die-casting parts and a riveted structure, making it easy to install and highly practical. Attached Figure Description

[0013] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0014] Figure 1 This is a schematic diagram of the structure of a single-row air-suction seed metering fan according to the present invention;

[0015] Figure 2 This is an enlarged structural diagram of the galvanized steel outer shell of a single-row air-suction seed metering fan according to this utility model.

[0016] Figure 3 This is an enlarged structural diagram of the second end cover of a single-row air-suction seed metering fan according to the present invention;

[0017] Figure 4 This is a schematic diagram of the split structure of the double balance shaft of a single-row air suction seed metering fan according to the present invention;

[0018] Figure 5 This is a schematic diagram of the disassembled injection molding frame structure of a single-row air suction seed metering fan according to the present invention;

[0019] Figure 6 This is a schematic diagram of the stator structure of a single-row air-suction seed metering fan according to the present invention.

[0020] In the diagram: 1-Galvanized steel plate shell, 2-Fan flange nut, 3-Fan blade, 4-Gasket, 5-Screw, 6-Guide wheel, 7-Fan blade spacer, 8-First end cover, 9-First bearing, 10-Insulating gasket, 11-Motor housing, 12-PCB board, 13-Wire guard spacer, 14-Second bearing, 15-Wave spring, 16-Second end cover, 17-Sealing film, 18-Stainless steel sleeve, 19-Double balance shaft, 20-Rotor sleeve, 21-Magnet sleeve, 22-Balance copper ring, 23-Injection molded wire frame, 24-Stator, 25-Wire frame with column, 26-Enameled wire, 27-White conductor, 28-Blue conductor, 29-Yellow conductor, 30-Banana head male connector. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] Please see Figures 1-6This utility model provides a technical solution: a single-row air-suction seed fan, comprising a zinc plate shell 1, fan blades 3, guide vanes 6, a motor housing 11, a double balance shaft 19, a stator 24, a rotor sleeve 20, and a PCB. The motor housing consists of a plate 12, a magnet sleeve 21, a white wire 27, a blue wire 28, and a yellow wire 29. A guide wheel 6 is nested inside the lower end of the galvanized steel outer shell 1 by multiple screws 5. A fan blade 3 is encapsulated between the galvanized steel outer shell 1 and the guide wheel 6, and is fixed to the upper end of the double balance shaft 19 by a fan blade flange nut 2 and a washer 4. A first end cover 8 and a second end cover 16 are precisely installed at the upper and lower ends of the motor housing 11, respectively. A first bearing 9 and a second bearing 14 are installed inside the first end cover 8 and the second end cover 16, respectively. The double balance shaft 19 is supported at both ends by the first bearing 9 and the second bearing 14, respectively. The stator 24 is insulated and fixed inside the motor housing 11 by an injection-molded wire frame 23 and a wire frame with columns 25. A rotor sleeve 20 is interference-fitted onto the outside of the double balance shaft 19, and the rotor sleeve 20 is concentric with the stator 24. A magnet sleeve 21 is embedded in the rotor sleeve 20. A balance copper ring 22 is press-fitted to the end of the rotor sleeve 20. (PCB) The PCB board 12 is fixed inside the motor housing 11 by insulating gaskets 10, and the solder joints of the PCB board 12 are soldered to the corresponding solder joints on the cable tray 25. One end of the white wire 27, blue wire 28, and yellow wire 29 are soldered to the PCB board 12, and the other end of the white wire 27, blue wire 28, and yellow wire 29 are led out through the cable guard post 13 as the three-phase input lines of the motor, which are connected to the banana plug male connector 30. This design solves the problems of low efficiency, easy clogging, frequent maintenance, and short lifespan that often exist in existing seeding fans. For example, traditional fan motors are inefficient, dust and moisture easily enter the bearings, causing failures, and there are problems with insufficient air volume and air pressure.

[0023] As the first embodiment of this utility model: a drain outlet and a fan hood opening are provided on the side of the zinc plate shell 1. The drain outlet can discharge a small amount of liquid water that is accidentally sucked in in time, avoiding accumulation inside the fan; while the fan hood opening is combined with the internal air duct, so that the dust or foreign objects thrown out by centrifugal force can be directly discharged to the outside of the machine body, forming a self-cleaning channel.

[0024] A blade spacer 7 is provided between the fan blade 3 and the guide wheel 6, and the blade spacer 7 is sleeved on the outside of the double balance shaft 19. The fan blade 3 is a centrifugal aluminum alloy impeller. The added blade spacer 7 is used to precisely define the axial installation position of the fan blade 3, ensuring optimal airflow clearance between the fan blade and the volute. The fan blade 3 is a centrifugal aluminum alloy impeller made with a riveted structure. This design achieves lightweight while ensuring structural strength.

[0025] A wave spring 15 is provided at the connection between the second end cover 16 and the second bearing 14. A stainless steel sleeve 18 is press-fitted into the center hole of the second end cover 16. The added wave spring 15 provides a stable axial preload for the bearing, which can effectively eliminate axial movement that may occur during high-speed operation and improve the smoothness of operation. The stainless steel sleeve 18, as a wear-resistant bushing of the shaft, can protect the end cover from wear and further extend its service life.

[0026] The stator 24 is wound with enameled wire 26, and the ends of the enameled wire 26 are welded to the column frame 25. The stator 24 is made of high-performance 0.35mm non-oriented silicon steel sheets to ensure high magnetic permeability and low iron loss. The ends of the enameled wire 26 are welded to the column frame 25, which realizes reliable electrical connection and insulation.

[0027] The magnet sleeve 21 is made of high-temperature resistant bonded neodymium iron boron. The magnetic material used in the added magnet sleeve 21 can maintain stable magnetic properties in high-temperature environments, ensuring that the motor efficiency does not decrease when working under continuous high load.

[0028] A sealing film 17 is provided at the connection between the first end cap 8 and the first bearing 9, and a sealing film 17 is also provided at the connection between the second end cap 16 and the second bearing 14. By adding the sealing film 17 at the connection between the first end cap 8 and the first bearing 9, and the sealing film 17 at the connection between the second end cap 16 and the second bearing 14, these two key sealing films 17 work together with the rubber cap sealing structure of the end cap to form an effective sealing barrier. This can significantly prevent dust, moisture and other contaminants from entering the bearing cavity, fundamentally extending the service life of the bearing and achieving lifetime maintenance-free operation of the product.

[0029] As a second embodiment of this utility model: First, the rotor assembly is assembled. The rotor sleeve 20 is pressed into the middle of the double balance shaft 19, then the magnet sleeve 21 is embedded in the rotor sleeve 20, and finally the balance copper ring 22 is pressed onto the end of the rotor sleeve 20 to complete the high-precision dynamic balance rotor assembly.

[0030] Next, the stator 24 is assembled with the motor housing. Enamelled wire 26 is wound onto the stator 24, and then the stator 24 assembly is insulated and fixed inside the motor housing 11 using the injection-molded wire frame 23 and the post-supported wire frame 25. The ends of the enamelled wire 26 are soldered to the corresponding solder points on the post-supported wire frame 25.

[0031] Next, the bearing end cover system is assembled. The first bearing 9 is pressed into the first end cover 8, and a sealing film 17 is installed at the connection. The second bearing 14 is placed into the bearing chamber of the second end cover 16, and a wave spring 15 is installed. At the same time, a stainless steel sleeve 18 is pressed into the center hole of the second end cover 16, and another sealing film 17 is installed on the contact surface with the bearing. Subsequently, the assembled first end cover 8 and second end cover 16 are precisely pressed into the upper and lower ends of the motor housing 11, respectively.

[0032] Next, final assembly is performed. The rotor assembly of the dual-balance shaft 19 is passed through the inner rings of the first bearing 9 and the second bearing 14 at both ends, completing the installation of the power core. The PCB board 12 is fixed inside the motor housing 11 using insulating pads 10, and its solder points are soldered to the solder points leading out from the cable tray 25. One end of the white wire 27, blue wire 28, and yellow wire 29 is soldered to the PCB board 12, and the other end passes through the cable guard post 13 and connects to the banana plug male connector 30, forming a complete three-phase power input interface.

[0033] Finally, the airflow module is assembled. The fan blade spacer 7, guide wheel 6, fan blade 3, and gasket 4 are sequentially fitted or aligned with the front end of the double balance shaft 19 already installed on the motor housing 11. Then, the fan blade flange nut 2 is used to lock it in place. Next, the guide wheel 6 is fixed to the inside of the galvanized steel outer shell 1 using multiple screws 5. Finally, the galvanized steel outer shell 1 with the guide wheel 6 assembled is joined to the motor housing 11 and secured with screws, completing the assembly of the entire fan.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0035] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A single-row air-suction seed fan, comprising a zinc plate shell (1), fan blades (3), a guide vane (6), a motor housing (11), a double balance shaft (19), a stator (24), a rotor sleeve (20), a PCB board (12), a magnet sleeve (21), white wires (27), blue wires (28), and yellow wires (29), characterized in that: The guide wheel (6) is nested inside the lower end of the galvanized steel plate shell (1) by multiple screws (5). The fan blade (3) is encapsulated between the galvanized steel plate shell (1) and the guide wheel (6), and the fan blade (3) is fixed to the upper end of the double balance shaft (19) by the fan blade flange nut (2) and the washer (4). The motor body shell (11) is precisely installed with a first end cover (8) and a second end cover (16) at the upper and lower ends, respectively. The first end cover (8) and the second end cover (16) are respectively installed with a first bearing (9) and a second bearing (9). 14), the two ends of the double balance shaft (19) are supported by the first bearing (9) and the second bearing (14) respectively. The stator (24) is insulated and fixed inside the motor housing (11) by the injection-molded wire frame (23) and the wire frame with column (25). The rotor sleeve (20) is interference-fitted to the outside of the double balance shaft (19), and the rotor sleeve (20) and the stator (24) are concentrically arranged. The magnet sleeve (21) is embedded in the rotor sleeve (20). The end of the rotor sleeve (20) is press-fitted with a balance copper ring (22). The PCB The board (12) is fixed inside the motor housing (11) by an insulating pad (10), and the solder joints of the PCB board (12) are connected to the corresponding solder joints on the wire frame (25) by welding. One end of the white wire (27), blue wire (28) and yellow wire (29) is soldered to the PCB board (12), and the other end of the white wire (27), blue wire (28) and yellow wire (29) is led out through the wire guard post (13) as the three-phase input line of the motor, which is connected to the banana head male connector (30).

2. The single-row air-suction type seed-metering fan according to claim 1, characterized in that: The zinc plate shell (1) has a drain outlet and a hood opening on its side.

3. The single-row air-suction type seed-metering fan according to claim 1, characterized in that: A blade partition (7) is provided between the fan blade (3) and the guide wheel (6), and the blade partition (7) is sleeved outside the double balance shaft (19). The fan blade (3) is a centrifugal aluminum alloy impeller.

4. The single-row air-suction type seed-metering fan according to claim 1, characterized in that: A wave spring (15) is provided at the connection between the second end cap (16) and the second bearing (14), and a stainless steel sleeve (18) is press-fitted into the center hole of the second end cap (16).

5. The single-row air-suction type seed-metering fan according to claim 1, characterized in that: The stator (24) is wound with enameled wire (26), and the ends of the enameled wire (26) are welded to the post frame (25).

6. The single-row air-suction type seed-metering fan according to claim 1, characterized in that: The magnet sleeve (21) is made of high-temperature resistant bonded neodymium iron boron.

7. The single-row air-suction type seed-metering fan according to claim 1, characterized in that: A sealing film (17) is provided at the connection between the first end cap (8) and the first bearing (9), and a sealing film (17) is also provided at the connection between the second end cap (16) and the second bearing (14).

Images