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

Abstract

The invention provides a speed-adjustable and voltage-adjustable fan for 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 blade center height of the fan impeller is greater than the diameter of a seed suction hole of the seed-metering device. The device is small in size, stable in wind power and high in 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 achieved, pressure can be adjusted according to different seeded crops, excessive seeding of crop seeds with light specific gravity is avoided, the single seed rate is fully guaranteed, the compatible range of seeded crops is large, and the application range is wide. The wind power range is wide in adjustment, and the multi-line working effect is high in consistency.

Description

Technical Field

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

[0002] The air force of the existing air suction seeder comes from the axial flow fan driven by the universal transmission shaft connected to the tractor power output shaft, and the structure is complex. This structure will be affected by the tractor power, such as the wind force fluctuating due to the size of the engine throttle; the wind force will be interrupted due to the tractor shifting operation; affected by the carrying structure (when turning at the end of the field during sowing operations, the tractor hydraulic suspension system needs to be used to lift the seeder more than 40 cm off the ground), when the angle is too large when the seeder is lifted, the power output is forced to be interrupted, the fan stops working, the wind force is interrupted, and the seeds on the seeding plate fall off. Even for traction operations, the engine can only work at idle speed during the turning process, which will cause the fan to stop or the wind force of the seeding plate to drop, and all the seeds will fall to the ground; at the same time, the turning radius cannot be too small, otherwise the universal transmission shaft will exceed the transmission angle, damage the transmission components or the fan, and after turning, it is necessary to drive a distance again to allow the seeding plate to re-absorb the seeds before normal sowing operations can be performed, so there will be problems of missed sowing 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 invention is proposed. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and to provide an adjustable speed and voltage electric fan for an air-suction seeding device, so as to solve the problems that the transmission parts of the above-mentioned existing seeding machines are cumbersome, the structure is complex, the cost is high, the electric fan is easy to damage, the operation is difficult, the seeds are wasted, the wind force cannot work stably and continuously, the wind force of each seeding device is inconsistent, and the tractor models that can be matched are few; and the fuel consumption is saved. The existing air-suction seeding machine requires the engine to be set at a speed of more than 1500 revolutions before it can operate, while the present invention does not limit the engine speed, thus saving seed consumption. Because the wind force of the present invention is continuous and stable, the seed tray will not be unable to absorb the seeds when the power is not turned off when the machine is stopped, and there is no need to turn around and set the engine speed each time and then drive a distance again to replenish the seeds on the seeding tray. Therefore, the present invention is simple to operate, convenient to install, and improves the working efficiency.

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: an electric fan with adjustable speed and voltage for an air-suction seed metering device, comprising a DC motor, a heat dissipation bearing seat connected to the DC motor, and a fan impeller matched with the heat dissipation bearing seat, wherein 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 also provided between the heat dissipation bearing seat and the fan impeller.

[0008] Preferably, a fan casing is sleeved on the outer side of the fan impeller, 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-matched with the annular groove.

[0009] Preferably, the center of the fan housing is designed to be turned inward and embedded in the center position of the fan impeller.

[0010] Preferably, at least two square air outlets are arranged 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 present invention has the following beneficial effects compared with the prior art:

[0013] (1) Compact size, stable wind force, and high stability in continuous operation. Each seed meter 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 lighter crop seeds, fully ensuring the single seed rate, a wide range of compatible sowing crops, a wide range of wind force adjustment, and high consistency of working effects for 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 re-seeding 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 actual sowing needs to avoid the electric fan running at unnecessary high speed, reduce energy waste, and lower agricultural production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the components of the present invention;

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

[0020] Figure 4 It is a schematic diagram of the structure of the motor driver of the present invention.

[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 is further described below in conjunction with the accompanying drawings and specific embodiments to help understand the content of the present invention.

[0023] like Figures 1 to 3 As shown, the DC motor 1 of the present invention can be selected as a 12V, 24V, 36V, 48V DC high-speed motor, and the voltage size 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 sleeved with a fan housing 5 on the outside. The fan housing 5 has an opening in the center. An annular groove coaxial with the central axis of the fan impeller 4 is arranged along the periphery of the opening. The opening is covered with a pressure cover 6, which is matched with the annular groove gap. At the same time, a dustproof gasket 3 is arranged between the heat dissipation bearing seat 2 and the fan impeller 4 to prevent dust from entering the inside 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 a side height of 8mm. This space is higher than the maximum seed suction hole diameter of the seed meter, so that impurities smaller than the seed suction hole diameter can be discharged. The center of the fan housing 5 is designed with an inward flange, embedded in the center position of the fan impeller 4, so that the suction force of the electric fan is stronger. A square air outlet is provided around the fan housing 5, so that air can be discharged smoothly from around the fan impeller 4, achieving the effects of high suction pressure and good exhaust and heat dissipation.

[0024] like Figure 4 As shown, the motor driver 7 with adjustable speed and voltage enables the present invention 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 principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An adjustable speed and voltage electric fan for air suction seeding device, characterized in that: It 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 speed-adjustable and voltage-adjustable electric blower for air-suction seeding device according to claim 1 is 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 is characterized in that: A dustproof gasket (3) is also provided between the heat dissipation bearing seat (2) and the fan impeller (4).

4. A speed-adjustable and voltage-adjustable electric blower for air-suction seeding according to any one of claims 1 to 3, characterized in that: The fan impeller (4) is sleeved 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 arranged 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 air-suction seeding device according to claim 4 is 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 air-suction seeding device according to claim 5, characterized in that: At least two square air outlets are arranged around the fan housing (5).

7. A speed-adjustable and voltage-adjustable electric blower for air-suction seeding device 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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