Air suction type electric drive seeder fan driving and power supply system and seeder

Abstract

The utility model relates to an air suction type electric drive seeder fan driving and power supply system and a seeder, and the air suction type electric drive seeder fan driving and power supply system comprises a PTO input shaft, a step-up gear box mechanically connected to the output end of the PTO input shaft, and a generator mechanically connected to the output end of the step-up gear box, the generator is electrically connected with a fan motor used for driving the centrifugal fan to rotate, and the fan motor is a variable frequency motor. According to the utility model, the technical problem that the wind pressure is unstable due to the fluctuation of the rotating speed of the engine when the existing seeding machine turns and / or turns around can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of seed drills, in particular to a fan drive and power supply system of an air-suction electric-driven seed drill and a seed drill. Background Art

[0002] Typically, electric seed drills are pneumatically driven, with their seeding mechanism typically consisting of a negative pressure blower, a fertilizer dispensing mechanism, and a seeding mechanism. Both the fertilizer dispensing and seeding mechanisms are driven by DC motors. Because the seed drill's blower is too powerful to be directly powered by the tractor's 12V power supply, it is typically driven directly by the tractor's PTO drive shaft through a speed-increasing gear or by a hydraulic motor.

[0003] As the existing seed drill fan drive method, when turning around in the field, the engine speed may drop, resulting in unstable wind pressure of the fan, wasting seeds and increasing planting costs. The hydraulic motor drive has the problems of complex hydraulic pipelines, insensitive motor speed adjustment and unstable fan speed. Utility Model Content

[0004] The utility model aims to solve the technical problem that when an existing seed drill is turned and / or turned around, wind pressure is unstable due to engine speed fluctuation, and provides an air suction electric drive seed drill fan drive and power supply system and a seed drill.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] On the one hand, the utility model provides an air-suction electric-driven seeder fan drive and power supply system, including a PTO input shaft, a speed-increasing gearbox mechanically connected to the output end of the PTO input shaft, and a generator mechanically connected to the output end of the speed-increasing gearbox, the generator being electrically connected to a fan motor for driving the centrifugal fan to rotate, and the fan motor being a variable frequency motor.

[0007] The beneficial effects of the present utility model are as follows: the generator is connected to the tractor PTO input shaft through a speed-increasing gearbox, thereby increasing the rotation speed to a speed range within which the generator can generate electricity; the PTO input shaft indirectly drives the generator to generate electricity and stabilizes the voltage within a certain range, and the centrifugal fan of the seed drill is driven by a fan motor, which is a variable frequency motor and can accurately control the fan speed, so as to improve the technical problem of unstable wind pressure caused by engine speed fluctuation when the existing seed drill turns and / or turns around.

[0008] On the basis of the above technical solution, the present invention can also be improved as follows.

[0009] Furthermore, the fan drive and power supply system of the air-suction electric-driven seeder also includes a rectifier and a voltage regulator, which is electrically connected to the generator and also electrically connected to the fan motor.

[0010] The beneficial effect of adopting the above further solution is that the three-phase AC power generated by the generator is rectified by the rectifier and voltage stabilizer, and the AC power is converted into DC power, so as to realize controllable variable speed and voltage regulated DC power generation through the rectifier and voltage stabilizer.

[0011] Furthermore, a motor controller is provided between the rectifier and the blower motor, and the motor controller is electrically connected to both the rectifier and the blower motor.

[0012] The beneficial effect of adopting the above further solution is that the motor controller can operate in a wide voltage range while being able to output rated power, and allows the DC voltage to fluctuate with a certain amplitude to form a protective effect on the circuit.

[0013] Furthermore, the rectifier regulator is also electrically connected to a DC / DC converter, the DC / DC converter is arranged in parallel with the motor controller, and the DC / DC converter is electrically connected to a display terminal.

[0014] The beneficial effect of adopting the above further solution is: converting high-voltage direct current of 72V and above into stable 12V direct current through a DC / DC converter and supplying it to low-voltage equipment such as a display terminal, while using the display terminal to monitor the working status and fault status of the DC / DC converter.

[0015] Furthermore, the display terminal is simultaneously signal-connected to the rectifier regulator and the motor controller.

[0016] The beneficial effect of adopting the above further scheme is: the fault diagnosis information and working status of the rectifier regulator and motor controller can be viewed through the display terminal, and the fan speed can be indirectly set through the display terminal, and the fan speed can be adjusted to provide the most suitable wind pressure for the seed drill.

[0017] Furthermore, the DC / DC converter is used to electrically connect the control system of the seed drill.

[0018] The beneficial effect of adopting the above further solution is: high-voltage direct current of 72V and above is converted into stable 12V direct current through a DC / DC converter to power low-voltage equipment such as a control system.

[0019] Furthermore, the DC / DC converter is also used to electrically connect the fertilizer discharge motor and the seed discharge motor of the seeder.

[0020] The beneficial effect of adopting the above further solution is: high-voltage direct current of 72V and above is converted into stable 12V direct current through a DC / DC converter to power low-voltage equipment such as fertilizer motors and seed motors.

[0021] Furthermore, the DC / DC converter is connected in parallel with a battery.

[0022] The beneficial effect of adopting the above further solution is: the control systems such as the motor controller, rectifier regulator, and display terminal can be powered on and awakened by the battery, and power can be provided by the battery to ensure that each low-voltage device can start and resume normal operation.

[0023] Furthermore, the fan motor belt is connected to the centrifugal fan.

[0024] The beneficial effect of adopting the above further solution is that the belt connection method is used to facilitate disassembly and assembly.

[0025] On the other hand, the utility model provides a seeder, comprising the aforementioned air-suction electric drive seeder fan drive and power supply system. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural diagram of the fan drive and power supply system of the air-suction electric-driven seeder of the present utility model.

[0027] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0028] 1. PTO input shaft; 2. Speed ​​increasing gearbox; 3. Generator; 4. Centrifugal fan; 5. Fan motor; 6. Rectifier and voltage regulator; 7. Motor controller; 8. DC / DC converter; 9. Display terminal; 10. Control system; 11. Fertilizer discharge motor; 12. Seed discharge motor; 13. Battery. DETAILED DESCRIPTION

[0029] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0030] On the one hand, the utility model provides a fan drive and power supply system for an air-suction electric-driven seed drill, as described in detail below.

[0031] Example 1

[0032] like Figure 1A fan drive and power supply system of an air-suction electric-driven seed drill includes a PTO input shaft 1, a speed-increasing gearbox 2 mechanically connected to the output end of the PTO input shaft 1, and a generator 3 mechanically connected to the output end of the speed-increasing gearbox 2. The generator 3 is electrically connected to a fan motor 5 for driving a centrifugal fan 4 to rotate. The fan motor 5 is a variable frequency motor.

[0033] The beneficial effects of this embodiment are as follows: the generator 3 is connected to the tractor PTO input shaft 1 through the speed-increasing gearbox 2, thereby increasing the rotation speed to a speed range within which the generator 3 can generate electricity; the PTO input shaft 1 indirectly drives the generator 3 to generate electricity and stabilizes the voltage within a certain range, and the centrifugal fan 4 of the seed drill is driven by the fan motor 5, which is a variable frequency motor and can accurately control the fan speed, so as to improve the technical problem of unstable wind pressure caused by engine speed fluctuation when the existing seed drill turns and / or turns around.

[0034] As a specific solution of the above embodiment, the tractor's PTO input shaft 1 is splined to the speed-increasing gearbox 2 on the planter, and the output shaft of the speed-increasing gearbox 2 is connected to the generator 3. The speed-increasing gearbox increases the PTO speed to the rated speed of the generator, allowing the generator 3 to generate full power.

[0035] The fan motor 5 may be an AC motor or a permanent magnet motor to improve the reliability and life of the fan.

[0036] Example 2

[0037] like Figure 1 On the basis of Example 1, the fan drive and power supply system of the air suction electric drive seed drill further includes a rectifier voltage regulator 6, which is electrically connected to the generator 3 and is also electrically connected to the fan motor 5.

[0038] The beneficial effect of adopting the preferred solution in the above embodiment is that the three-phase AC power generated by the generator 3 is rectified by the rectifier and voltage stabilizer 6 to convert the AC power into DC power, so as to realize controllable variable speed and voltage stabilized DC power generation through the rectifier and voltage stabilizer 6.

[0039] In the prior art, the PTO speed output by the PTO input shaft 1 will decrease when the tractor is turning or making a U-turn, or the PTO speed will increase due to a sudden reduction in the tractor load, resulting in a sudden increase or decrease in the rectified voltage, affecting the normal operation of the fan motor 5. In the embodiment of the utility model, a voltage stabilizing circuit and a control algorithm having a rectifier regulator 6 are used to stabilize the voltage change caused by the engine speed from 800 to 2500 rpm within the normal operating range of the fan motor 5.

[0040] The DC voltage output by the generator 3 and the rectifier regulator 6 is 72V or above, so as to facilitate the selection of the generator 3 and the fan motor 5.

[0041] Example 3

[0042] like Figure 1 On the basis of embodiments 1 and 2, a motor controller 7 is provided between the rectifier regulator 6 and the fan motor 5 , and the motor controller 7 is electrically connected to both the rectifier regulator 6 and the fan motor 5 .

[0043] The beneficial effect of adopting the preferred solution in the above embodiment is that the motor controller 7 can operate over a wide voltage range while still being able to output rated power, allowing for a certain amplitude of DC voltage fluctuation to provide circuit protection. The motor controller 7 can invert DC power into AC power to drive the fan motor 5.

[0044] Example 4

[0045] like Figure 1 On the basis of Examples 1-3, the rectifier and voltage regulator 6 is further electrically connected to a DC / DC converter 8, which is arranged in parallel with the motor controller 7. The rectifier and voltage regulator 6 outputs stable DC power to the motor controller 7 and the DC / DC converter 8, and the low-voltage output end of the DC / DC converter 8 is electrically connected to the display terminal 9 to power the display terminal 9.

[0046] The beneficial effect of adopting the preferred solution in the above embodiment is that high-voltage DC power of 72V or above is converted into stable 12V DC power through the DC / DC converter 8 and supplied to low-voltage equipment such as the display terminal 9, while the display terminal 9 is used to monitor the working status and fault status of the DC / DC converter 8.

[0047] The display terminal 9 can be a touch screen or a host computer. The DC / DC converter 8 can communicate with the display terminal 9 via a field bus such as CAN or RS485 to view its working status and fault status.

[0048] In this embodiment, under the action of the rectifier and voltage stabilizer 6, the voltage stabilizing circuit having the rectifier and voltage stabilizer 6 stabilizes the voltage change caused by the engine speed from 800 to 2500 rpm within the normal operating range of the DC / DC converter 8.

[0049] Example 5

[0050] like Figure 1 On the basis of embodiments 1-4, the display terminal 9 is simultaneously signal-connected to the rectifier regulator 6 and the motor controller 7 . Figure 1 In the figure, the connection relationship between the display terminal 9 and the rectifier regulator 6 is not shown separately.

[0051] The beneficial effect of adopting the preferred scheme in the above embodiment is that the fault diagnosis information and working status of the rectifier regulator 6 and the motor controller 7 can be viewed through the display terminal 9, and the fan speed can be indirectly set through the display terminal 9, and the fan speed can be adjusted to provide the most suitable wind pressure for the seed drill.

[0052] As a specific embodiment of the above embodiment, the generator 3 and the rectifier-voltage regulator 6 have voltage regulation mode, torque mode, overheat protection, and fault diagnosis functions, and can communicate with the display terminal 9 via a field bus such as CAN or RS485. Fault diagnosis information for the generator 3 and the rectifier-voltage regulator 6 can be viewed through the display terminal 9.

[0053] The motor controller 7 features speed and torque operating modes, as well as protections for overvoltage, undervoltage, and overheating, as well as fault diagnosis. It communicates with the display terminal 9 via a fieldbus such as CAN or RS485. The speed of the fan motor 5 is set and adjusted via the display terminal 9 to provide the optimal wind pressure for the planter. The operating status and fault status of the fan motor 5 can also be viewed on the touch screen. While still capable of outputting rated power, the motor controller 7 operates across a wide voltage range, allowing for a certain degree of DC voltage fluctuation.

[0054] Example 6

[0055] like Figure 1 On the basis of embodiments 1-5, the low-voltage output end of the DC / DC converter 8 is used to electrically connect to the control system 10 of the seed drill to supply power to the control system 10 .

[0056] The beneficial effect of adopting the preferred solution in the above embodiment is that the high-voltage direct current of 72V and above is converted into stable 12V direct current by the DC / DC converter 8 to power low-voltage equipment such as the control system 10.

[0057] Example 7

[0058] like Figure 1 On the basis of Examples 1-6, the low-voltage output end of the DC / DC converter 8 is also used to electrically connect the fertilizer motor 11 and the seed motor 12 of the seeder to power the fertilizer motor 11 and the seed motor 12.

[0059] The beneficial effect of adopting the preferred solution in the above embodiment is that the high-voltage direct current of 72V and above is converted into stable 12V direct current through the DC / DC converter 8 to power low-voltage equipment such as the fertilizer motor 11 and the seed motor 12.

[0060] Example 8

[0061] like Figure 1On the basis of embodiment 1-7, the DC / DC converter 8 is connected in parallel with a battery 13.

[0062] The beneficial effect of adopting the preferred solution in the above embodiment is that the control systems such as the motor controller 7, the rectifier regulator 6, and the display terminal 9 can be powered on and awakened by the battery 13, and power is provided by the battery 13 to ensure that each low-voltage device can start and resume normal operation.

[0063] The rated power of the DC / DC converter 8 can be selected according to the number of sowing rows of the seeder, and is not restricted by the power of the generator of the tractor itself, forming a closed system with independent energy use of the seeder, reducing the wiring harness connection and pipeline connection between the seeder and the tractor, and only the PTO input shaft 1 is mechanically connected, which is very convenient to use.

[0064] Example 9

[0065] like Figure 1 Based on Examples 1-8, the fan motor 5 is connected to the centrifugal fan 4 by a belt.

[0066] The beneficial effect of adopting the preferred solution in the above embodiment is that the belt connection method is used to facilitate disassembly and assembly.

[0067] It should be noted that the output shaft of the fan motor 5 and the input shaft of the centrifugal fan 4 are both coaxially fixedly connected with pulleys, and a belt is simultaneously sleeved and tensioned on the two pulleys to drive the centrifugal fan 4 through the belt connection under the drive of the fan motor 5.

[0068] On the other hand, the present invention provides a seed drill, which is described in detail below.

[0069] Example 10

[0070] A seeder includes an air-suction electric-driven seeder fan drive and power supply system as described in Examples 1-9.

[0071] The beneficial effect of adopting the preferred solution in the above embodiment is that it solves the problem of unstable wind pressure in the air suction seeder caused by large fluctuations in the engine speed, and also solves the problem of limited power consumption in a seeder with a large number of rows.

[0072] Among them, the electricity used by the fan motor 5 and the seed drill is provided by the generator 3, and the mechanical energy of the PTO input shaft 1 is converted into electrical energy;

[0073] The generator 3 has a voltage stabilization function, which stabilizes the voltage within the range where the fan motor 5 and the DC / DC converter can operate normally, and the voltage generated by the generator 3 is a DC power of 72V or above;

[0074] The motor controller 7, rectifier regulator 6, and DC / DC converter 8 all have protection and fault diagnosis functions and can communicate with the display terminal 9 on the planter. The display terminal 9 can be used to set the functions of the equipment at each node and view information;

[0075] The battery 13 connected in parallel to the output end of the DC / DC converter 8 can wake up low-voltage control devices such as the motor controller 7;

[0076] The seeder is only mechanically connected to the tractor traction and PTO input shaft 1 and other transmission mechanisms, without other hydraulic and electrical connections, and is easy to use.

[0077] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0078] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0079] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0080] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0081] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0082] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A fan drive and power supply system for an air-suction electric-driven seed drill, characterized in that: The invention comprises a PTO input shaft (1), a speed-increasing gearbox (2) mechanically connected to the output end of the PTO input shaft (1), and a generator (3) mechanically connected to the output end of the speed-increasing gearbox (2); the generator (3) is electrically connected to a fan motor (5) for driving a centrifugal fan (4) to rotate; the fan motor (5) is a variable frequency motor.

2. The air suction type electric drive seed drill fan drive and power supply system according to claim 1, characterized in that: The air suction type electric drive seed drill fan drive and power supply system further comprises a rectifier voltage regulator (6), wherein the rectifier voltage regulator (6) is electrically connected to the generator (3) and is also electrically connected to the fan motor (5).

3. The air suction type electric drive seed drill fan drive and power supply system according to claim 2, characterized in that: A motor controller (7) is provided between the rectifier voltage regulator (6) and the fan motor (5), and the motor controller (7) is electrically connected to both the rectifier voltage regulator (6) and the fan motor (5).

4. The fan drive and power supply system of an air suction electric drive seed drill according to claim 3, characterized in that: The rectifier voltage regulator (6) is also electrically connected to a DC / DC converter (8), and the DC / DC converter (8) is arranged in parallel with the motor controller (7). The rectifier voltage regulator (6) outputs stable direct current to supply the motor controller (7) and the DC / DC converter (8), and the low-voltage output end of the DC / DC converter (8) is electrically connected to a display terminal (9) to supply power to the display terminal (9).

5. The air suction type electric drive seed drill fan drive and power supply system according to claim 4, characterized in that: The display terminal (9) is simultaneously signal-connected to the rectifier regulator (6) and the motor controller (7).

6. The air suction type electric drive seed drill fan drive and power supply system according to claim 4, characterized in that: The low-voltage output end of the DC / DC converter (8) is used to electrically connect to the control system (10) of the seed drill to supply power to the control system (10).

7. The air suction type electric drive seed drill fan drive and power supply system according to claim 6, characterized in that: The low-voltage output end of the DC / DC converter (8) is also used to electrically connect the fertilizer discharge motor (11) and the seed discharge motor (12) of the seed drill to supply power to the fertilizer discharge motor (11) and the seed discharge motor (12).

8. A fan drive and power supply system for an air-suction electric-driven seed drill according to any one of claims 4 to 7, characterized in that: The DC / DC converter (8) is connected in parallel with a battery (13).

9. The fan drive and power supply system of an air suction electric drive seed drill according to any one of claims 1 to 7, characterized in that: The fan motor (5) is belt-connected to the centrifugal fan (4).

10. A seed drill, characterized in that: It comprises a fan drive and power supply system for an air-suction electric-driven seeder as described in any one of claims 1-9.

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