Pressure Pulsation Damper with Throttled Chamber Connection
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Solution Overview
Problem
Existing pressure pulsation dampers for hydraulic installations face challenges with stiffness requirements for high working pressures, leading to reduced reactivity and damping efficiency, and are prone to wear and complex safety requirements, especially when using displaceable separating diaphragms.
Innovation Solution
An apparatus employing a '1-chamber principle with damping throttle' connects the working and compensation chambers via a line device with a defined cross-sectional profile, allowing for adjustable damping by varying the throttle design, which relieves the elastic separating diaphragm from quasi-static pressure and enables effective damping of pressure pulsations without preloading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the elastic separating diaphragm is designed to be relatively stiff for high working pressures, then the strength requirement is met, but the reactivity and damping efficiency of the apparatus deteriorates
Solution Approach 1:
A throttling device is introduced as an intermediary element between the working chamber and compensation chamber. This throttling device controls the fluid exchange, allowing the separating diaphragm to remain stiff for strength while the throttling effect provides the necessary damping action. The throttling device mediates between the strength requirement and damping requirement by controlling the rate of fluid flow.
Solution Approach 2:
The invention utilizes hydraulic principles by introducing a throttling device that controls fluid flow between chambers. The throttling effect creates a pressure difference that enables damping without requiring the separating diaphragm to be flexible, thus maintaining strength while achieving damping efficiency through hydraulic flow control.
2Adaptability or versatility
If displaceable separating diaphragms are used to compensate for pressure changes, then pressure compensation is achieved, but wear and tolerance sensitivity increase
Solution Approach 1:
The invention extracts the displacement function from the separating diaphragm itself. Instead of the diaphragm moving to compensate for pressure changes, the compensation is achieved through fluid exchange controlled by the throttling device. This removes the wear-prone moving components while maintaining pressure compensation capability.
Solution Approach 2:
The mechanical displacement system (movable diaphragm) is replaced with a fluid-based compensation system. The throttling device controls fluid flow to achieve volume compensation without mechanical movement of the separating diaphragm, eliminating wear and tolerance sensitivity issues associated with moving parts.
3Force
If preloading with high pressures is applied to the compensation chamber, then damping force is increased, but safety requirements and costs increase
Solution Approach 1:
The invention transitions from a static preloading system to a dynamic damping system. Instead of applying constant high pressure for preloading, the throttling device dynamically controls fluid flow based on operating conditions, providing necessary damping force only when needed. This reduces safety requirements while maintaining damping effectiveness.
Solution Approach 2:
The damping force is not fixed through preloading but is dynamically adjusted through the throttling device. The throttling effect creates variable pressure differences based on flow conditions, allowing the system to provide appropriate damping force without the safety concerns of permanent high-pressure preloading.
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 design simplifies construction, reduces production costs, ensures durability and reliability, and allows for adaptable damping across a wide pressure range, minimizing wear and maintaining fluid-tightness, while optimizing the elastic behavior of the separating diaphragm for improved pressure pulsation damping.
Implementation Method 1
the dynamic pressure profile in a first chamber, the working chamber, is transferred to a second chamber, the compensation chamber, which generally closed off from the surroundings and acts as mating spring, by the elasticity of a separating diaphragm
Implementation Method 2
a dynamic pressure profile in the compensation chamber is delayed (that is to say damped) in relation to the dynamic working pressure profile (pressure profile in the working chamber), resulting in a pressure difference Δp between compensation chamber and working chamber
Data Source
AI summary
An apparatus (1) for damping pressure pulsations, includes: a working chamber (5) to which a working pressure (p1) is or can be applied; and a compensation chamber (6) which is separated from the working chamber (5) by an at least partially elastic separating diaphragm (4). The apparatus (1) is distinguished in that working chamber (5) and compensation chamber (6) are connected to one another in a fluid-conducting manner via at least one line device (7).