Pneumatic Seed Drill Riser Pipe Vertical Alignment
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Solution Overview
Problem
Pneumatic seed distribution machines face uneven distribution when operating on slopes due to misalignment of the riser pipe, causing seeds to hit the distributor head off-center and resulting in uneven seed distribution.
Innovation Solution
An inclination sensor calculates the deviation of the riser pipe from the vertical position and adjusts it using connected adjustment elements, such as a ball-and-socket-like connecting element or elastic area, to ensure central impact on the distributor head, with an electronic on-board computer transmitting signals for precise alignment and vibration prevention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the riser pipe is aligned vertically when the machine is level, then the seed hits the distributor head centrally and distributes evenly, but when driving across a slope the riser pipe becomes misaligned and the seed distribution becomes uneven
Solution Approach 1:
The riser pipe is made adjustable through a ball-and-socket joint connection that allows dynamic repositioning. The adjustment elements enable the riser pipe to be realigned vertically even when the machine operates on slopes, maintaining central impact on the distributor head and ensuring uniform seed distribution across all discharge lines.
Solution Approach 2:
An inclination sensor continuously monitors the riser pipe's angular position and provides feedback to the control system. Based on this feedback, the adjustment elements automatically or manually reposition the riser pipe to maintain vertical alignment, ensuring consistent seed distribution regardless of machine orientation on slopes.
2Adaptability or versatility
If adjustment elements are added to the riser pipe connection, then the riser pipe can be realigned vertically on slopes, but the device complexity increases
Solution Approach 1:
A ball-and-socket joint is introduced at the riser pipe connection point, providing dynamic adjustability with minimal structural complexity. This universal joint allows the riser pipe to be repositioned in any orientation while maintaining a relatively simple overall conveying line structure compared to more complex mechanical adjustment systems.
Solution Approach 2:
The conveying line is segmented into fixed portions and an adjustable riser pipe portion. This segmentation allows the adjustment function to be isolated to specific components (ball-and-socket joint and adjustment elements) rather than requiring complexity throughout the entire conveying line structure.
3Manufacturing precision
If the inclination sensor continuously monitors and adjusts the riser pipe position, then vertical alignment is maintained, but excessive vibration may occur during frequent adjustments
Solution Approach 1:
The inclination sensor provides continuous feedback on the riser pipe's angular deviation from vertical. The control system uses this feedback to determine when adjustment is necessary, enabling precise control that minimizes unnecessary adjustments and reduces vibration while maintaining accurate vertical alignment.
Solution Approach 2:
The system applies adjustment only when the inclination sensor detects deviation beyond a predetermined threshold, rather than continuously adjusting. This partial action approach reduces the frequency of adjustments and minimizes vibration while still maintaining sufficient vertical alignment for proper seed distribution.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Ensures even seed distribution across discharge lines by maintaining the riser pipe's vertical alignment, regardless of machine orientation, thereby stabilizing the seed flow and preventing excessive vibration during adjustments.
Implementation Method 1
the inclination sensor (13), which acts on two intersecting axes, is arranged on the riser (2) in order to be able to determine the position or inclination of the riser (2) to the vertical (12) in any direction
Implementation Method 2
an elastic area (11) is arranged in the conveying line (1) at the lower end of the riser pipe (2), which can also be designed like a ball joint in a manner not shown
Data Source
Figure 1~3
AI summary
At least one inclination sensor (13) is arranged on the machine. A riser tube (2) with a broadcasting head (4) is arranged on the chassis (6) of the machine by means of a ball-head or universal joint. At least two adjusting elements (2) are arranged between the chassis and the riser tube. Based on the data from the inclination sensor, the adjusting elements set the riser tube to a substantially vertical position.