High-Density Solids Pump Variable Hydraulic Drive Control
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Solution Overview
Problem
Existing thick matter pumps lack optimal operation efficiency due to fixed pump parameter settings, which do not account for varying total drive volume flow setpoints, leading to suboptimal performance and energy inefficiency.
Innovation Solution
A method for operating a thick matter pump with a hydraulic drive system featuring a variably adjustable first and second drive pump, allowing for independent adjustment of pump parameters to generate a total drive volume flow, with automatic determination of setpoints based on the total drive volume flow setpoint, enabling optimal operation across different flow ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If fixed pump parameter settings are used, then device complexity is reduced, but operation efficiency deteriorates
Solution Approach 1:
The patent applies dynamics by transitioning from fixed pump parameter settings to variable parameter control. The control system dynamically adjusts pump parameters (such as displacement, speed, or pressure) based on real-time operating conditions and total drive volume flow setpoints, allowing the system to adapt to varying demands and maintain optimal efficiency across different operating ranges.
Solution Approach 2:
The patent implements parameter changes by modifying pump operating parameters (displacement, speed, or pressure) as a function of the total drive volume flow setpoint. The control system calculates optimal parameter values based on the desired flow rate and adjusts the pump accordingly, enabling efficient operation across the full range of possible flow rates rather than being constrained to fixed settings.
2Device complexity
If single pump operation is used, then device complexity is reduced, but adaptability deteriorates
Solution Approach 1:
The patent applies segmentation by dividing the drive pump function into multiple independent pumps. Instead of relying on a single pump to cover the entire flow range, the system uses multiple pumps that can be individually controlled and combined in various configurations. This segmentation allows each pump to operate within its optimal range while the collective system achieves broad adaptability across all required flow rates.
Solution Approach 2:
The patent implements universality by designing a control system that can universally manage multiple pumps in different operational modes. The same control system handles single-pump operation, dual-pump operation, sequential activation, and parallel operation, making the system versatile enough to adapt to various flow demands without requiring different hardware configurations.
3Ease of operation
If equal parameter setpoints are used for both pumps, then control simplicity is improved, but energy efficiency deteriorates
Solution Approach 1:
The patent applies local quality by assigning different parameter setpoints to different pumps based on their individual characteristics and the specific operating conditions. Rather than applying a uniform control strategy to all pumps, the system optimizes each pump's parameters (displacement, speed, or pressure) independently according to its role in meeting the total drive volume flow setpoint, thereby minimizing energy consumption for each pump's specific task.
Solution Approach 2:
The patent implements parameter changes by dynamically adjusting each pump's operating parameters based on the total drive volume flow setpoint and the desired operational mode. The control system calculates optimal parameter values for each pump individually, allowing them to operate at peak efficiency points rather than forcing equal parameter settings that would compromise overall energy efficiency.
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
This approach allows for improved thick matter pump operation by optimizing pump parameter settings, enhancing efficiency and energy management, particularly by adjusting pump speeds and swivel angles in response to changing flow demands, thereby maximizing hydraulic drive system efficiency and reducing energy consumption.
Implementation Method 1
The hydraulic drive system has a hydraulic circuit (4) with hydraulic fluid (HF), a variably operable first drive pump (5) and a variably operable second drive pump (7) for driving the slurry conveying system (2)
Data Source
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AI summary
The invention relates to a method for operating a high-density solids pump (1), - the high-density solids pump (1) comprising: - a high-density solids delivery system (2), the high-density solids delivery system (2) being designed to deliver high-density solid matter (DS) with a delivery volume flow (QF) that can be variably adjusted, and – a hydraulic drive system (3), the hydraulic drive system (3) for driving the high-density solids delivery system (2) having: - a hydraulic circuit (4) having a hydraulic fluid (HF), - a first drive pump (5) which can be variably operated, and – a second drive pump (7) which can be variably operated, - the first drive pump (5) being designed for variable operation with at least one variably adjustable first pump parameter (P5) and the second drive pump (7) being designed for variable operation, independent of the first pump parameter (P5), with a second variably adjustable pump parameter (P7) for generating a variably adjustable total drive volume flow (QA) of the hydraulic fluid (HF) in the hydraulic circuit (4), - the method comprising the following steps: - determining a total drive volume flow target value (QAS) for the total drive volume flow (QA), - determining a first parameter target value (P5S) for the first pump parameter (P5) and a second parameter target value (P7S) for the second pump parameter (P7) dependent on the total drive volume flow target value (QAS) determined, the first parameter target value (P5S) and the second parameter target volume (P7S) differing from each other if the total drive volume flow target value (QAS) determined is in at least one total drive volume flow target value range (QASB1, QASB2, QASB3, QASB1') from a set (0, QASB1, QASB2, QASB3, QASB4, QASB1', QASB2', QASB3') of possible total drive volume flow target values (QAS), and – delivering the high-density solids (DS) with the delivery volume flow (QF) with a delivery volume flow target value (QFS) by generating the total drive volume flow (QA) with the determined total drive volume flow target value (QAS) by adjusting the first pump parameter (P5) to the first parameter target value (P5S) determined and the second pump parameter (P7) to the second parameter target value (P7S) determined.