Bidirectional Servo Hydraulic Drive for Smooth Pressure Intensification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Hydraulic pressure intensifiers with switching blocks introduce structural complexity and mechanical stress peaks due to pressure shocks when switching working fluid, leading to pressure fluctuations and reduced safety and design simplicity.
Innovation Solution
A bidirectional servo-driven hydraulic pump with pressure and position control for plunger pistons, coupled with a heat exchanger for temperature adjustment and a feed system to manage working fluid pressure, eliminates switching block-induced shocks and allows gentle pressure build-up, simplifying the design and enhancing safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a switching block is used to alternate loading of working piston surfaces, then the pressure intensifier can switch working fluid, but structural complexity increases and mechanical stress peaks occur due to pressure shocks
Solution Approach 1:
The patent removes the switching block from the hydraulic system entirely. Instead of using a separate switching component to alternate loading of piston surfaces, the system uses the bidirectional servo drive to directly control pump rotation, eliminating the need for mechanical switching blocks and their associated complexity
Solution Approach 2:
The patent replaces the mechanical switching block system with an electro-hydraulic control system. The bidirectional servo drive uses electrical signals to control pump rotation direction, substituting mechanical switching components with an electrically controlled hydraulic system that achieves the same function without mechanical complexity
2Ease of operation
If a switching block is used to switch working fluid, then pressure alternation is achieved, but mechanical stress peaks and pressure fluctuations increase reducing safety
Solution Approach 1:
The patent employs a dynamic control approach where the bidirectional servo drive continuously adjusts pump rotation in real-time. This dynamic control allows smooth transitions between pressure states without the abrupt switching actions that cause stress peaks, thereby improving system reliability and safety
Solution Approach 2:
The system uses feedback from pressure sensors and position sensors to continuously monitor system state. The control unit processes this feedback information and adjusts the servo drive accordingly, enabling closed-loop control that prevents excessive pressure fluctuations and maintains system safety
3Reliability
If a bidirectional servo-driven pump is used, then pressure build-up is gentle and switching shocks are avoided, but system complexity may increase due to servo control requirements
Solution Approach 1:
The bidirectional servo-driven pump serves multiple functions: it generates hydraulic pressure, controls flow direction, and enables precise position control of the plunger. By integrating these functions into a single component with intelligent control, the system avoids adding separate complexity while achieving smooth pressure build-up
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 solution reduces pressure fluctuations, minimizes mechanical stress, and achieves cost-effective, reliable high-pressure systems with controlled pressure build-up and optimal temperature management, ensuring safer and more efficient operation.
Implementation Method 1
a constant flow rate pump (11) which can be driven bidirectionally, i.e. reversibly, by a servo drive (12)
Implementation Method 2
at least one heat exchanger (52, 53) in the guide means (3) and/or in the vessel (10) for adjusting the temperature of the working fluid is positioned
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a hydraulic drive for a pressure intensifier of a high-pressure device, in particular for a water jet cutting system, consisting essentially of a hydraulic pump which delivers a constant volume of working fluid per revolution, driven by an electric servo drive, operatively connected to a control and/or measuring signal controlled or switchable electrical supply. In order to create a hydraulic drive for a pressure booster of a high-pressure fluid device, which causes low pressure fluctuations and shocks in the high-pressure system and thus reduces the peaks in material stress and ensures greater safety, as well as simplifying the system design and having economic advantages, it is provided according to the invention that the servo drive for the Bidirectional high-pressure pump, i.e. formed as a reversible motor, and in this way loading of the pressure booster with working fluid can be reversed, with control of the control parameters and/or the switching parameters of the electrical supply of the servo drive based on signals from measuring devices of the pressure and/or pressure curve of the working fluid and/or or pressure and pressure profile of the high-pressure fluid and/or based on the position of the plunger in the pressure intensifier.