Barrier-Fluid Pulsation Damping for Solid-Laden Pump Pipelines
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing pulsation damping systems are inadequate for effectively reducing large pressure surges and fluctuations in pipelines, particularly in piston pumps, and are not suitable for conveying fluids with solids due to clogging issues and reduced damping effectiveness.
Innovation Solution
A pulsation damping system with a secondary pipeline containing an incompressible barrier fluid, such as hydraulic oil, and a volume-changing body that transfers pressure surges to the barrier fluid, which is then dissipated through throttles and a volume storage tank, preventing clogging and maintaining effective damping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a throttle resistor or compensation chamber is used in known pulsation dampers, then pressure pulsations can be reduced, but the components tend to clog when conveying fluids with solids
Solution Approach 1:
The patent introduces a barrier fluid as an intermediary substance that fills the compensation chamber and surrounds the piston. This barrier fluid acts as a mediator between the pumped fluid (containing solids) and the compensation chamber, preventing solids from entering and clogging the throttle resistor or compensation chamber while still allowing pressure pulsations to be effectively dampened through the barrier fluid's compression and expansion.
2Object-affected harmful factors
If the compensation chamber is made large enough to avoid clogging, then the damping effect decreases significantly
Solution Approach 1:
The barrier fluid serves as an intermediary that allows the compensation chamber to maintain a smaller, more effective size for pressure pulsation damping while preventing clogging. The barrier fluid's properties (viscosity, flow characteristics) are optimized to provide both clogging prevention and effective damping without requiring excessive chamber volume.
Solution Approach 2:
The patent changes the physical parameters of the system by introducing a barrier fluid with specific properties (viscosity, compressibility) that optimize both the damping effect and clogging prevention. The barrier fluid's parameters are selected to provide adequate flow resistance to prevent solid particle passage while maintaining effective pressure pulsation absorption in a compact chamber.
3Reliability
If a throttle resistor is used to dampen pressure pulsations, then pressure fluctuations are reduced, but the throttle point wears out quickly due to abrasive solids
Solution Approach 1:
The barrier fluid acts as a protective intermediary layer between the abrasive solids in the pumped fluid and the throttle resistor. By preventing solid particles from directly contacting the throttle resistor, the barrier fluid eliminates wear and extends the service life of the throttle component while maintaining its pressure pulsation damping function.
4Reliability
If gas is used in the compensation chamber, then pressure pulsations can be compensated, but the gas compressibility results in small pressure changes compared to the fluid
Solution Approach 1:
The patent transitions from using compressible gas to using an incompressible or low-compressibility barrier fluid (such as hydraulic oil) in the compensation chamber. This hydraulic approach provides much larger and more effective pressure changes in response to pressure pulsations, significantly improving the damping effect compared to gas-based systems.
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 system effectively compensates for large pressure surges and fluctuations, preventing clogging and ensuring long-lasting performance even with fluids containing solids, by transferring pulsation energy into heat and maintaining pressure equilibrium.
Implementation Method 1
an increase in pressure is compensated for by a compression of the volume of gas in the chamber
Implementation Method 2
a volume storage tank in which a gas volume is formed, the pressure of which can be equalized to a pressure prevailing in the main pipeline
Implementation Method 3
When flowing through the throttle, part of the pulsation energy can in particular be converted into heat as a result of the pressure loss in the flow resistance
Implementation Method 4
part of the pulsation energy can in particular be converted into heat as a result of the pressure loss in the flow resistance
Implementation Method 5
the barrier fluid at least partially absorbs the pressure surge and is forced by the volume change body through the throttle located in the branch pipe into the volume storage tank
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a pulsation damping system (100) for reducing pressure oscillations in pipelines, in particular in the suction and/or high-pressure field of piston pumps, having a volume modification body (1) arranged in a main pipeline (10), and a volume storage container (2, 25) fluidically connected to the volume modification body (1) via at least one auxiliary pipeline (3, 3a, 3b, 3c) which is fluidically separated from the main pipeline (10). At least one throttle valve (4a, 4b) is arranged in the at least one auxiliary pipeline (3, 3a, 3b, 3c).