Common Rail Spray Circuit With Pressure Accumulators for Stable Boom Pressure
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Solution Overview
Problem
Agricultural applicators face challenges in maintaining consistent boom pressure during variations in ground speed, leading to undesirable spray quality due to fluctuations in pressure across boom sections.
Innovation Solution
A common rail product circuit with pressure accumulators is implemented, allowing for adjustments in circuit pressure to maintain a predetermined range, ensuring consistent spray quality by regulating the operation of the product pump and nozzle valves, and utilizing pressure accumulators to stabilize pressure deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the product pump is controlled to provide a desired product flow rate, then the productivity is improved, but the boom pressure stability deteriorates when ground speed varies
Solution Approach 1:
The pressure accumulator stores agricultural product in advance at high pressure, ready to be quickly released when pressure drops due to sudden speed increases. This preliminary storage of pressurized product allows the system to respond immediately to pressure variations without waiting for the pump to adjust, thereby maintaining boom pressure stability while preserving productivity.
Solution Approach 2:
The pressure accumulator acts as a cushion by absorbing pressure fluctuations before they propagate through the boom system. When the pump generates excessive pressure during sudden deceleration, the accumulator absorbs the excess energy; when pressure drops during acceleration, it releases stored energy. This beforehand cushioning protects the spray system from pressure instability while maintaining continuous product flow.
2Adaptability or versatility
If the ground speed varies suddenly, then the adaptability to field conditions is improved, but the spray quality deteriorates due to pressure variations
Solution Approach 1:
The pressure accumulator serves as an intermediary element between the product pump and the boom spray system. It decouples the pump's output from the boom's pressure requirements, allowing the boom to maintain consistent pressure even when ground speed changes. The accumulator mediates the interaction between variable speed conditions and constant pressure requirements, protecting spray quality while enabling speed adaptability.
Solution Approach 2:
The system utilizes hydraulic principles through the pressure accumulator, which stores agricultural product under pressure and releases it on demand to maintain constant boom pressure. This hydraulic approach allows rapid response to pressure changes without mechanical adjustments to the pump or boom, ensuring consistent spray quality regardless of ground speed variations.
3Stability of the object's composition
If the pump responds quickly to pressure changes, then the pressure stability is improved, but the response time to speed changes becomes insufficient
Solution Approach 1:
The pressure accumulator performs preliminary action by pre-storing agricultural product at high pressure, ready for immediate release. When pressure drops due to sudden acceleration, the accumulator instantly releases stored product without waiting for the pump to respond. This preliminary preparation enables pressure stabilization that is independent of pump response time, effectively decoupling pressure stability from pump speed limitations.
Solution Approach 2:
The hydraulic system leverages the incompressibility of liquid agricultural product and the elastic energy storage capability of the pressure accumulator to provide instantaneous pressure compensation. This hydraulic mechanism responds faster than mechanical pump adjustments, achieving rapid pressure stabilization that overcomes the inherent response time limitations of the pump system.
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
The solution effectively maintains consistent boom pressure, improving spray quality by minimizing pressure fluctuations and ensuring consistent droplet sizes and spray patterns even during changes in ground speed.
Implementation Method 1
at least one pressure accumulator provided in fluid communication with the common rail product circuit, with the at least one pressure accumulator being configured to adjust a circuit pressure of the agricultural product within the common rail product circuit in response to pressure deviations from a predetermined pressure range
Data Source
AI summary
A product application system for an agricultural applicator includes a boom assembly including a plurality of boom sections, with each boom section being pivotably coupled to at least one adjacent boom section. The system also includes a common rail product circuit spanning across a length of the boom assembly, a product pump configured to supply an agricultural product through the common rail product circuit, and a plurality of nozzle assemblies provided in association with each of the boom sections. Each nozzle assembly across the plurality of boom sections is individually coupled to the common rail product circuit. In addition, the system includes at least one pressure accumulator provided in fluid communication with the common rail product circuit, with the pressure accumulator(s) being configured to adjust a circuit pressure of the agricultural product within the common rail product circuit in response to pressure deviations from a predetermined pressure range.