Integrated Multi-Gear Pump Control for Automatic Gear Switching
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Solution Overview
Problem
Users of multi-gear pumps face difficulties in designing control programs for gear switching due to lack of familiarity with the pumps' operation, leading to a need for an improved intrinsic control system that reduces programming efforts and allows for automatic gear control.
Innovation Solution
Integration of a gear control module within the control board or frequency converter of the multi-gear pump, which automatically switches gears based on predefined conditions and user-input signals, eliminating the need for external programming and allowing for adaptive control without requiring users to be proficient in PLC programming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a PLC is used to control gear switching in multi-gear pumps, then the gear control function can be implemented, but the device complexity and programming effort increase significantly for users
Solution Approach 1:
The patent merges the gear control function directly into the pump's intrinsic control system by integrating a gear control module into the control board or frequency converter. This combines the pump control and gear switching control into a single unified system, eliminating the need for separate PLC programming while maintaining automatic gear switching capability based on pressure and flow conditions.
Solution Approach 2:
The pump's control system performs self-service by automatically determining when to switch gears based on monitored pressure and flow conditions. The gear control module autonomously compares actual operating conditions against predefined thresholds and executes gear switching without requiring external PLC intervention, allowing the system to self-regulate its own operation.
2Adaptability or versatility
If users implement gear control through external PLC programming, then flexible control is achieved, but the ease of operation deteriorates due to programming requirements
Solution Approach 1:
The control system provides self-service by automatically adapting to different operating conditions through predefined pressure and flow thresholds. The system monitors its own performance parameters and autonomously adjusts gear selection based on real-time conditions, eliminating the need for users to program control logic while maintaining flexible adaptive control.
Solution Approach 2:
The patent implements adaptability through parameter-based control where the gear control module adjusts operational parameters (gear selection) based on changes in system conditions (pressure and flow). By using configurable threshold parameters, the system maintains versatility in responding to different operating scenarios without requiring complex programming, simply by adjusting parameter values.
3Extent of automation
If a separate PLC system is used for gear control, then the control function is independent, but the device complexity and wiring requirements increase
Solution Approach 1:
The patent combines the gear control functionality with the pump's existing control infrastructure by integrating the gear control module into the control board or frequency converter. This merger consolidates multiple control functions into a single integrated unit, eliminating the need for separate PLC hardware and reducing wiring complexity while preserving automatic gear switching capability.
Data Source
Figure 1~2
Figure 3~5
AI summary
Disclosed is a multi-gear pump having a plurality of gears, including at least a high gear and a low gear, with the multi-gear pump comprising a gear control module, wherein the gear control module is integrated in a control board (3) or a frequency converter (4) of a driving motor of the multi-gear pump, and is configured to switch the gear of the multi-gear pump from the high gear to the low gear when a low-gear condition is satisfied within one control period, and to switch the gear of the multi-gear pump from the low gear to the high gear when a high-gear condition is satisfied within one control period.