Hydraulic Pulsation Damper With Flushable Dead-Space-Free Chamber
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Solution Overview
Problem
Existing damping devices for fluids face challenges in cleaning due to trapped fluid residue between the hydraulic accumulator's separating element and the accumulator wall, necessitating disassembly, cleaning, and reassembly, which is complex, expensive, and results in extended system downtime.
Innovation Solution
A damping device design with separably fixed housing components and a damper housing containing a second fluid chamber with a movable separating element, allowing for cleaning of the damper housing alone, eliminating the need for disassembly and reassembly of the hydraulic accumulator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the hydraulic accumulator is used as a damping device for fluids, then pressure pulsations are smoothed out, but fluid residue becomes trapped between the separating element and accumulator wall making cleaning impossible
Solution Approach 1:
The device is divided into two independent housing parts: a first housing part containing the hydraulic accumulator and a second housing part containing the damping chamber. This segmentation allows the damping chamber to be cleaned separately by removing only the second housing part, while the hydraulic accumulator remains intact and functional.
Solution Approach 2:
The damping chamber is extracted as a separate functional unit from the hydraulic accumulator. By providing a separate second housing part that can be removed, the fluid residue trapping problem is isolated to the removable damping chamber rather than the entire accumulator system.
2Ease of operation
If the damping device is cleaned by disassembling the hydraulic accumulator, then fluid residue is removed, but the process becomes complex and time-consuming
Solution Approach 1:
The housing is segmented into removable parts, specifically the second housing part containing the damping chamber can be separately removed for cleaning. This eliminates the need to disassemble the entire hydraulic accumulator, reducing cleaning complexity and time.
Solution Approach 2:
The damping chamber is extracted as a separate removable component. This allows cleaning operations to be performed on only the necessary part (second housing part) rather than the entire accumulator assembly, significantly reducing maintenance downtime.
3Reliability
If sealing elements are replaced during cleaning, then contamination is prevented, but costs and time increase
Solution Approach 1:
The housing is divided into separable parts with sealing elements located at the interface between the first and second housing parts. This segmentation allows sealing elements to be accessed and replaced by simply removing the second housing part, rather than requiring complete disassembly of the accumulator.
Solution Approach 2:
The second housing part containing the damping chamber is extracted as a separate unit. This extraction provides direct access to the sealing elements at the housing interface, enabling maintenance personnel to service seals without the complex disassembly previously required.
4Device complexity
If the same fluid is used in both the accumulator and damping chamber, then the system is simpler, but contamination occurs when changing fluids
Solution Approach 1:
The fluid system is segmented into two separate chambers: the first fluid chamber in the hydraulic accumulator and the second fluid chamber in the damping housing. This physical segmentation allows different fluids to be used in each chamber independently, enabling fluid changes in the damping chamber without affecting the accumulator fluid.
Solution Approach 2:
The second fluid chamber is extracted as a separate removable unit. This extraction enables the damping chamber to be isolated and its fluid changed independently from the accumulator, providing versatility for handling different fluids while maintaining system simplicity through modular design.
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
Enables efficient cleaning during operation by flushing the damper housing, reducing downtime and ensuring compliance with purity requirements without disassembly, while using a chemically neutral separation fluid to prevent contamination.
Implementation Method 1
a damping device for fluids exhibiting pressure pulsations, having the features of claim 1... at least one hydraulic accumulator, the accumulator housing of which includes a first movable separating element that separates a gas side from a first fluid space and can be pressurized by a fluid located in the first fluid space
Implementation Method 2
damping devices that incorporate a hydraulic accumulator providing a flexible pressure cushion... to smooth out pressure pulsations
Implementation Method 3
a damper housing with a second fluid space is provided as a component of the accumulator housing, which can be flowed through by the fluid subject to pressure pulsations and contains a second movable separating element that separates the second fluid space from the first fluid space of the hydraulic accumulator without dead space
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a damping device for fluids affected by pressure pulsations, comprising at least one hydraulic reservoir (2), the reservoir housing (4, 6) of which contains a movable separating element (18), which separates a gas side (14) from a fluid space (16) and can be pressurised by a fluid in the fluid space (16), which damping device is characterized in that a damper housing (34) having a second fluid space (38) is provided as a component of the reservoir housing (4, 6), through which fluid affected by pressure pulsations can flow, and contains a second movable separating element (40) which separates the second fluid space (38) from the first fluid space (16) of the hydraulic reservoir (2) without any dead space.