Hydraulic Piston Compressor Damping for Noise and Load
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Solution Overview
Problem
Piston compressors face inefficiencies due to residual volume or dead space at the top dead center, leading to re-expansion and reduced delivery volume, along with increased component loading and noise emissions, especially when using hydraulic drives with ionic fluids.
Innovation Solution
A method for operating a piston compressor that involves dynamically controlling the hydraulic medium in the first volume based on the position and rotational angle of the hydraulic piston and the pressure in the cylinder, using suitable valves to prevent reciprocating piston strikes and adjust the compression ratio through a hydraulic damping unit, which connects to a reservoir to manage hydraulic medium levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If hydraulic drive with ionic fluid is used to compress the medium, then the dead space in the cylinder can be reduced to a minimum and delivery volume is increased, but additional component loads and sound emissions are generated due to liquid strike
Solution Approach 1:
The patent applies beforehand cushioning by introducing a damping unit with damping medium into the hydraulic circuit before the reciprocating piston reaches the reversal point. The damping unit absorbs the kinetic energy of the hydraulic medium and piston through viscous resistance, preventing the liquid strike and mechanical contact before they occur. This resolves the contradiction by maintaining the hydraulic drive's high delivery volume while eliminating the harmful sound emissions and component loads.
2Productivity
If hydraulic drive with ionic fluid is used to compress the medium, then the dead space in the cylinder can be reduced to a minimum and delivery volume is increased, but additional component loads are generated due to mechanical contacts in the reversal points
Solution Approach 1:
The damping unit is positioned in the hydraulic circuit to act before the reciprocating piston reaches the reversal point, absorbing kinetic energy through viscous resistance of the damping medium. This prevents mechanical contact between the piston and cylinder head/bottom, thereby reducing component loads while maintaining the high delivery volume advantage of hydraulic drive.
Solution Approach 2:
The damping unit acts as an intermediary element in the hydraulic circuit, mediating between the hydraulic piston and the reciprocating piston. It transforms the direct mechanical contact problem into a controlled energy dissipation process through the damping medium, protecting the compressor components from excessive loads while preserving the compression efficiency.
3Ease of operation
If hydraulic drive is used, then an oil filling quantity must be controlled and compensated for due to internal leakage in the hydraulic circuit
Solution Approach 1:
The damping unit is designed to be partially filled with damping medium, and the remaining volume is automatically filled with hydraulic medium during operation. The system self-regulates the fluid levels through pressure equalization and volume compensation, eliminating the need for external control systems to monitor and adjust oil filling quantity despite internal leakage in the hydraulic circuit.
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 approach reduces sound emissions and component loading by minimizing hydraulic medium imbalances, optimizing the compression process, and extending the service life of compressor components while allowing for more efficient energy use and reduced vibrations.
Implementation Method 1
In this case, kinetic energy is dissipated in the form of vibrations. In addition to reducing undesired fluctuation or oscillation of the vehicle, this also enables the reduction of component loads and sound emissions.
Data Source
AI summary
The invention relates to a method for operating a piston compressor (100) having a reciprocating piston (111) in a cylinder (110), wherein an inlet valve (112) and an outlet valve (113) are provided in the cylinder (110) on the side of a medium (b) which is to be compressed and conveyed, wherein the reciprocating piston (111) is moved to and fro by way of a hydraulic drive (120, 121) with a hydraulic piston (120) with the use of a hydraulic medium (a) in a first volume (141), with which the reciprocating piston (111) is loaded on the side of the hydraulic drive (120, 121), wherein, if required, hydraulic medium (a) is fed into the first volume (141) and/or is discharged from the first volume (141) in a manner which is dependent on a position of the hydraulic piston (120) and/or a rotational angle ((p) of a shaft (121) which is provided for moving the hydraulic piston (120) in relation to a position (x) of the reciprocating piston (120) and/or a pressure (p) in the first volume (141), and to a piston compressor (100) of this type.