Speed-adjustable and voltage-adjustable electric fan of air suction seed-metering device

Abstract

The utility model provides a speed-adjustable and voltage-adjustable fan of an air suction seed-metering device, which comprises a direct-current motor, a heat dissipation bearing seat connected with the direct-current motor and a fan impeller matched with the heat dissipation bearing seat, and the height of the center of a blade of the fan impeller is larger than the diameter of a seed suction hole of the seed-metering device. The utility model has the advantages of small volume, stable wind power and high continuous operation stability, each seed-metering device is provided with an independent electric fan, the function of closing single-row seeding at any time can be realized, the pressure can be adjusted according to different seeded crops, the excessive seeding of crop seeds with light specific gravity is avoided, the single seed rate is fully ensured, the compatible range of seeded crops is large, and the seeding efficiency is high. The wind power range is wide in adjustment, and the multi-line working effect is high in consistency.

Description

Technical Field

[0001] The utility model relates to the technical field of high-speed DC negative pressure fans, in particular to a speed- and voltage-adjustable electric fan for an air suction seeding device. Background Art

[0002] Existing pneumatic seeders derive their pneumatic power from an axial fan connected to a universal joint connected to the tractor's power output shaft. This complex structure is affected by tractor power, resulting in fluctuating wind speeds depending on the engine throttle. Wind interruptions can occur due to tractor gear shifting. Furthermore, due to the tractor's carrying structure (when turning at the end of the field during seeding, the tractor's hydraulic suspension system must be used to lift the seeder more than 40 centimeters off the ground), excessive lifting angles can force power outages, stalling the fan, disrupting wind power, and causing seeds to fall from the seed tray. Even with towed operation, the engine idles during turns, causing the fan to stall or the wind speed to drop from the seed tray, causing seeds to fall to the ground. Furthermore, the turning radius must be kept tight, otherwise the universal joint shaft will exceed the transmission angle, damaging transmission components or the fan. After turning, the seeder must be driven a certain distance again to allow the seed tray to re-engage the seeds before seeding can resume. This can lead to missed seeds and wasted seeds. And affected by the length of the suction pipe, the 2nd to 12th rows of the seeder need to be connected to an air suction port through a pipe, so that the wind force of each seeding device is inconsistent. The farther the seeding device is from the fan, the longer the pipe is and the smaller the wind force is.

[0003] In view of this, the present utility model is proposed. Utility Model Content

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and provide an electric blower with adjustable speed and voltage for an air-suction seeding device. This solves the problems of the existing seeding machines, such as complicated transmission components, complex structure, high cost, easy damage, difficult operation, seed waste, unstable and continuous wind power, inconsistent wind power of each seeding device, and limited compatible tractor models. The utility model also saves fuel consumption. Existing air-suction seeding machines require an engine speed of more than 1500 rpm to operate, while the present utility model does not limit the engine speed, thus saving seed consumption. Because the wind power of the utility model is continuous and stable, the seed tray will not be unable to absorb seeds even if the power is not turned off when the machine is parked. There is no need to turn around and set the engine speed each time and then drive a distance to refill the seed tray. Therefore, the present utility model is simple to operate and easy to install, improving operating efficiency.

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is: an electric fan with adjustable speed and voltage for an air suction seed metering device, including a DC motor, a heat dissipation bearing seat connected to the DC motor, and a fan impeller matched with the heat dissipation bearing seat, and the center height of the fan impeller blades is higher than the diameter of the seed suction hole of the seed metering device.

[0006] Preferably, the electric blower is also provided with a motor driver with adjustable speed and voltage.

[0007] Preferably, a dustproof gasket is further provided between the heat dissipation bearing seat and the fan impeller.

[0008] Preferably, the fan impeller is covered with a fan casing on the outside, the fan casing has an opening in the center, an annular groove coaxial with the central axis of the fan impeller is arranged along the periphery of the opening, and the opening is covered with a pressure cover, which is gap-fitted with the annular groove.

[0009] Preferably, the center of the fan housing is designed to be flanged inwards and embedded in the center of the fan impeller.

[0010] Preferably, at least two square air outlets are provided around the fan housing.

[0011] Preferably, the blades of the fan impeller adopt a seven-blade involute centrifugal structure design.

[0012] After adopting the above technical solution, the utility model has the following beneficial effects compared with the prior art:

[0013] (1) It has a small size, stable wind power, and high stability in continuous operation. Each seeding device is equipped with an independent electric fan, which can realize the function of shutting down single-row sowing at any time. The pressure can be adjusted according to the different crops sown to avoid excessive sowing of light-weight crop seeds, fully ensuring the single-seed rate. It has a large compatible range of sowing crops, a wide range of wind power adjustment, and high consistency in the working effect of multiple rows.

[0014] (2) By flexibly adjusting the motor speed, the negative pressure can be accurately adjusted according to different seed characteristics and sowing requirements, effectively reducing missed and reseeding phenomena, improving sowing uniformity and accuracy, and ensuring good growth and yield of crops.

[0015] (3) It can adapt to different terrains, soil conditions and sowing operations of various seed types, improve the application range and operation flexibility of the air-suction seeder, and enhance its applicability.

[0016] (4) Adjust the speed according to the actual sowing needs to avoid the electric fan running at an unnecessary high speed, reduce energy waste, and lower agricultural production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1This is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the components of the utility model;

[0019] Figure 3 This is a schematic diagram of the fan impeller structure of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the motor driver of the utility model.

[0021] In the figure: 1-DC motor, 2-heat dissipation bearing seat, 3-dustproof gasket, 4-fan impeller, 5-fan housing, 6-pressure cover, 7-motor driver. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments to facilitate understanding of the present invention.

[0023] like Figures 1 to 3 As shown, the DC motor 1 of the present invention can be a DC high-speed motor with optional voltages of 12V, 24V, 36V, or 48V. The voltage is determined by the number of sowing rows. The DC motor 1 is connected to the fin heat dissipation bearing seat 2 and cooperates with the fan impeller 4. The fan impeller 4 is covered with a fan housing 5 on the outside. There is an opening in the center of the fan housing 5. An annular groove coaxial with the central axis of the fan impeller 4 is provided along the periphery of the opening. The opening is covered with a pressure cover 6, which is in clearance with the annular groove. At the same time, a dustproof gasket 3 is provided between the heat dissipation bearing seat 2 and the fan impeller 4 to prevent dust from entering the interior of the electric fan, thereby extending the service life of the electric fan. The blades of the fan impeller 4 adopt a seven-blade involute centrifugal structure design, with a blade center height of 16mm and an edge height of 8mm. This space is higher than the maximum seed suction hole diameter of the seed meter, allowing impurities smaller than the seed suction hole diameter to be discharged. The center of the fan housing 5 is designed with an inward flange and embedded in the center position of the fan impeller 4, making the electric fan suction force stronger. Square exhaust ports are provided around the fan housing 5 to allow air to be discharged smoothly from around the fan impeller 4, achieving high suction pressure and good exhaust and heat dissipation effects.

[0024] like Figure 4 As shown, the speed- and voltage-adjustable motor driver 7 enables the utility model to have better performance and higher efficiency, and at the same time is more compact in size, making the entire drive system more streamlined, which is particularly beneficial for miniaturization and integrated applications. The stability and durability in harsh environments are also significantly improved, achieving extremely high sowing accuracy and increasing multi-type sowing functionality.

[0025] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. An air suction seed metering device with adjustable speed and voltage electric fan, characterized in that: The invention comprises a DC motor (1), a heat dissipation bearing seat (2) connected to the DC motor (1), and a fan impeller (4) matched with the heat dissipation bearing seat (2), wherein the center height of the blades of the fan impeller (4) is higher than the diameter of the seed suction hole of the seed metering device.

2. The air suction seed metering device with adjustable speed and voltage according to claim 1, characterized in that: The electric fan is also provided with a motor driver (7) capable of adjusting speed and voltage.

3. The speed-adjustable and voltage-adjustable electric blower for air-suction seeding device according to claim 2, characterized in that: A dustproof gasket (3) is also provided between the heat dissipation bearing seat (2) and the fan impeller (4).

4. The speed-adjustable and voltage-adjustable electric blower for air-suction seed metering according to any one of claims 1 to 3, characterized in that: The fan impeller (4) is covered with a fan housing (5) on the outside, the fan housing (5) has an opening in the center, and an annular groove coaxial with the central axis of the fan impeller (4) is provided along the periphery of the opening, and the opening is covered with a pressure cover (6) which is in clearance fit with the annular groove.

5. The speed-adjustable and voltage-adjustable electric blower for an air-suction seed metering device according to claim 4, characterized in that: The center of the fan housing (5) is designed to be turned inwards and embedded in the center of the fan impeller (4).

6. The speed-adjustable and voltage-adjustable electric blower for an air-suction seed metering device according to claim 5, characterized in that: At least two square air outlets are arranged around the fan housing (5).

7. A speed- and voltage-adjustable electric blower for air-suction seed metering according to any one of claims 1 to 3, 5 to 6, characterized in that: The blades of the fan impeller (4) are designed with a seven-blade involute centrifugal structure.

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