Triple-Gear Pump Valve Sequencing for Low-Pulsation Switching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing pump systems experience significant pressure pulsation on the outlet side when switching between series and parallel states due to rapid changes in flow rate caused by the operation of a single variable throttle valve.
Innovation Solution
A pump system with a first and second throttle valve configuration, where the second valve is closed before the first, allowing gradual changes in flow rate and pressure when transitioning between series and parallel states, minimizing pressure pulsation by controlling the opening and closing of these valves over a period of about 2 seconds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single variable throttle valve is used to switch between series and parallel states, then the switching operation is simple, but the flow rate changes rapidly causing significant pressure pulsation
Solution Approach 1:
The single throttle valve is segmented into two throttle valves (first and second throttle valves) that operate in sequence. This segmentation allows the flow rate transition to be divided into multiple controlled stages, preventing rapid flow changes and reducing pressure pulsation while maintaining relatively simple device structure.
Solution Approach 2:
The first throttle valve is operated in advance to gradually adjust the flow rate before the state switching is completed. This preliminary action prepares the system for the upcoming state change, ensuring that when the second throttle valve operates, the flow rate transition is already buffered, thereby minimizing pressure pulsation.
2Object-affected harmful factors
If the variable throttle valve is operated gently to reduce pressure pulsation, then pressure stability improves, but the switching operation takes a long time
Solution Approach 1:
The switching process is divided into periodic stages: first the first throttle valve is operated to gradually adjust flow, then the second throttle valve is operated to complete the switching. This periodic, multi-stage action allows each valve to operate at optimal speed for its specific function, achieving both fast overall switching and smooth flow transition with minimal pressure pulsation.
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 gradual valve operations reduce pressure pulsation on the outlet side, enabling smooth transitions between states in a short time, maintaining stable flow rates and pressures without sudden fluctuations.
Implementation Method 1
a first throttle valve (4) and a second throttle valve (5)... when a degree of opening of the first throttle valve (4) and a degree of opening of the second throttle valve (5) are controlled in a specific manner
Data Source
Figure 1
Figure 2
AI summary
A pump system (1) includes: a triple-gear pump which pressurizes a fluid using three gears (3a, 3b and 3c); an outlet flow path (R4) which guides the fluid from a first pressure-increasing portion (A) to an outlet; a first flow path (R1) which guides the fluid from the first pressure-increasing portion to a second pressure-increasing portion (B); a second flow path (R2) which guides the fluid from the second pressure-increasing portion to the outlet flow path; a third flow path (R3) connected to the first flow path and the second flow path; a first valve device (4) provided in the first flow path; a second valve device (7) provided in the second flow path, and a control device (8) which controls the first valve device. When the first pressure-increasing portion and the second pressure-increasing portion are switched from a parallel state to a series state, the control device causes the first valve device to open after the second valve device is closed.