Latest Trends in Hydraulic Systems

The common applications of the hydraulic system perform lifting, holding and gripping. Hydraulic systems will transmit power using the pressure of incompressible fluids. In most of the cases, the fluid is taken from a reservoir using pumps. These are simple, safe, and economic systems that can be controlled easily and accurately. Providing constant force regardless of the speed is an advantage of the hydraulic system.


Types Of Hydraulic Systems: 

Open loop hydraulic system and closed loop hydraulic system are the two types of hydraulic system. In an open loop system, when the actuating mechanism is idle, there will be fluid flow but no pressure. For a closed loop system, when the pump operates there will be pressure for fluids. The fluid will flow continuously between the pump and the actuator without entering into the reservoir for a closed loop system. Whereas, for an open loop system, the fluid flow from the actuator to the reservoir and then fresh fluid flow towards the pump inlet. Open loop systems use a directional control valve and closed-loop system use an additional pump called charge pump or feed pump. Less heat generation is the advantage of open loop hydraulic system and precise response of actuation is the advantage of the closed-loop hydraulic system.

1.    Hybrid actuation systems


Hybrid Actuation System (HAS) is ideal for harsh power generation environments such as those used with solar panels, wind turbines, and hydroelectric dams. HAS can be combined with an integrated Intellinder sensor, that eliminates the complexity of gun drilling and unprotected external sensors. This system improves efficiency without any complex maintenance.

2.    Smart user interfaces

The hydraulic industry is moving forward to create user interface applications. Already, Parker has succeeded in developing a UX Toolkit software tool that simplifies all applications of the machine. This application included core machine functions, smart control systems, diagnostics or prediction applications that decrease downtime, or GPS monitoring and navigation applications. Using Parker’s pro display HMI module, the desired features can be centralized into a single display and a uniform user interface.

3.    Load sensing valve technology


EQA (Electric Flow Amplifier) EcoFormance technology bring advancements in load sensing valves by improving the machine control. This technology is used in mining, forest and construction machines. Similarly, IQAN connect is another product by Parker that monitor and control mobile machines.

4.    Expandable SKF Quickgrip Bolt


These new generation bolts are used to connect two rotating flanges quickly, reliably and easily. These SKF Quickgrip Bolts can be applied to all types of critical applications such as propulsion systems. It eliminates potential slippage and it can transfer both heavy radial and axial loads.

5.    Hydraulic Design Tools


Most of the current generation hydraulic design tools included one-dimensional modeling. But, soon the industry will convert into two dimensional or 3D modeling. This will improve the project quality and resiliency. This technology can locate and illustrate patterns of flow discharge, water surface elevations, depth, velocity, and shear stress. Thus, it provides accurate data for the planning and design team.


Five key technology trends presented by Parker Hannifin that are shaping the future of hydraulics:

1. Innovative heavy-duty vehicle technology


New generation load sensing valves: Parker’s EQA EcoFormance electric flow amplifier technology is a significant advancement in load sensing valves. By automatically adapting the meter-out pressure to the load conditions, machine control is greatly improved. This is especially useful for functions with slew or jib movements, or digger arms with over-centre movement.

Electro-hydraulic control: Parker’s IQAN Connect is a totally electronic approach that replaces mechanical and electromechanical systems for controlling and monitoring hydraulics in mobile machines. This digital ecosystem ties together Parker’s smart hydraulics and electronics products, resulting in a synergy of intelligent components and customisable software that delivers next generation connectivity while providing flexibility in design and development.

Accurate mobile diagnostics: Abnormal temperature and pressure levels can adversely impact the function of hydraulic lines and pump systems in heavy mobile machinery. Parker’s SensoNODE BlueTM sensors give users an advanced condition monitoring solution that provides accurate readings without excessive wiring, allowing for mobile diagnostics with the cab door closed.


2. A smart user interface to improve machine efficiency


Parker has been building a new presence in industrial Internet platforms and ecosystems by developing a software platform for advanced and flexible user interface design. This enables machine manufacturers to increase machine functionality and efficiency and to create new types of business. Developing smart applications requires a robust software platform for the HMI device. Parker’s UX Toolkit software tool enables easier development of demanding applications for machine instrumentation, control and adjustment. The applications can include supporting applications for core machine functions, smart control systems, diagnostics or prediction applications that decrease downtime, or GPS monitoring and navigation applications. Solutions helping end-users to improve performance and efficiency include applications for mobile hands-free devices, logbooks, usage monitoring, and task management (for example managing bus lines).


3. Energy-saving hydraulic systems using drive controlled pumps

Modern industrial machinery is creating ever-increasing demands on hydraulics to provide more efficient and quieter solutions with a smaller footprint, while maintaining the traditional benefits of hydraulic systems such as high power density, precise control and enduring performance. But these benefits come with the high cost of inefficient energy allocation, heat generation and noise.

Conventional hydraulic power units require oversized pumps and motors to ensure performance during a system’s highest duty cycle demands. In today’s eco-conscious and globally competitive economic environment, a transition to systems in which power is precisely modulated to the requirements of specific tasks within highly complex hydraulic systems is essential. This is where drive controlled pump (DCP) technology can provide a solution to address the challenges of more demanding applications, rising energy costs and greater environmental requirements.


4. Variable speed drives become simpler and more efficient


Variable speed pump drives save up to 70% energy compared to conventional drive solutions. Parker has developed a new, innovative variation of its drive controlled pump. The combination of an optimised axial piston pump with two displacement volumes and a very compact synchronous servo motor offers decisive advantages over common variable speed pump systems:

• Low torque due to de-stroking in pressure holding, resulting in reduced acquisition costs for the motor and frequency converter.

• High traverse speed through up-stroking when in rapid drive mode.

• High operating pressure, high productivity and high energy efficiency.


5. New hybrid actuation system ideal for renewable energy applications

Parker has developed a hybrid actuation system (HAS) that is ideal for renewable energy actuation applications such as those used with solar panels, wind turbines and hydroelectric dams. The new hybrid design combines the controllability of traditional electromechanical actuators with the power density, longer life and resistive force capabilities of traditional hydraulic systems. The result is an improved actuation system for wind and hydro and other renewable energy systems, with a wider range of capabilities.

The hybrid design of this high efficiency, modular system is a fully self-contained system with no hydraulic hoses or power units. Hybrid hydraulics achieve exceptional economies of scale, with the ability to move over a megawatt from a single point. This makes HAS a good choice for large or small arrays.


Hydraulic Machines and Fluid Power: Home Assignment

Blog on Latest Trends in Hydraulic Systems

Group Information:

Vivek Sanap: Roll no. 6


Sanket Lavalekar: Roll no. 8


Arya Sapre: Roll no. 9


Sarja Daware: Roll no. 12


Soham Sathe: Roll no. 21

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