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Mobile Hydraulics
TECHNOLOGY UPDATES
Giant conveyors walk to work

Time certainly is money in mining. So it’s imperative at RWE Power AG’s Garzweiler and Inden lignite open-pit mines in Germany to transfer mined material from the excavation site to conveyors as quickly as possible. However, one problem inevitably arises: when a particular excavation site is finished, all the massive digging and conveyor equipment must be shifted to a new excavation site.

In this recent Hydraulics & Pneumatics case history, we learn how each conveyor station is supported by legs that each uses three hydraulic cylinders to periodically walk closer to the excavation site. The mine operator recently worked with Bosch Rexroth to update this solution with the latest electrohydraulic drive and control technology.

Read the whole story.


More on efficiency, control, and performance.



Attachments boost business growth

Although most contractors realize they can increase utilization of compact equipment by using attachments, there are those who have turned it into almost an art. Such contractors have managed to take a small fleet of carriers and convert them into multipurpose workhorses capable of taking on most any task a project owner or general contractor can dish out.

This Equipment Today article details how a number of contractors are using different attachments to expand the range of work they can perform, to help keep work flowing in challenging economic times.

The Bosch Rexroth View: Mobile equipment users need to be versatile and flexible in the way they use technology to enhance their competitive value, and investigate how the right investments in system upgrades can expand their business horizons.

Read the whole story.


More on efficiency,serviceability and performance.



Sealing systems take the heat

Excessive pressures and temperatures, as well as fluid incompatibility, have always spelled trouble for hydraulic cylinder seals. Tighter emissions regulations for mobile equipment are leading to a new generation of diesel engines that run hotter and will likely need high-temperature catalytic oxidizers. That will subject hydraulics to more heat.

Also, more machine operators turning to so-called environmentally friendly hydraulic fluids, but bio oils often aren’t so friendly to traditional seals. And to get more work out of smaller, lighter actuators, hydraulic-equipment manufacturers continue to push pressures ever higher.

This Machine Design article takes an in-depth look at the current state of hydraulic sealing systems. The good news: the next generation of mobile equipment should run cleaner, and probably use less fuel than today’s machines -- and there are new sealing systems designs and materials in development to work in these conditions.

Read the whole story.


More on efficiency, reliability, and performance.



Going with the flow – only faster

While over the years mobile hydraulic systems have become much more responsive to the operator’s input, opportunities remain to improve this aspect of mobile equipment performance. For example, most conventional flow-sharing systems control the supply pressure of the valve control through hydro-mechanical systems.

The advent of more sophisticated and precise flow control system that replaces hydro-mechanical systems with integrated electronic flow control is examined in this recent Diesel Progress North America article. Bosch Rexroth’s Electrohydraulic Flow Matching system, which is based on integrating multiple Rexroth components including the A10VO pump, an electrohydraulic load-sensing valve, and the BODAS controller platform is reviewed in detail, demonstrating how electronic flow control can be more precise and respond much faster to operator commands.

Read the whole story at Diesel Progress Online. Subscription required.


More on efficiency, reliability, control, and performance.



Take control of crash rates

In 2005, more than 6500 transportation accidents occurred in the construction industry, according to the most recently available figures. With foresight and proper planning an safety practices, contractors can reduce their companies’ fleet crash risk and protect their financial security by mitigating liability and workers’ compensation exposures.

In this recent article in Construction Executive, we learn several key tips for improving safety and reducing risk, including hiring drivers with clean driving records, comparing crash rates, evaluating and updating company safety policies and supporting ongoing safety training as a routine element of fleet operations.

The Bosch Rexroth View: Smart electrohydraulics, a range of controls, and innovative valves and smart sensing combine to make an operator’s job easier, safer, and more productive. Plus, electrohydraulics offer better traction control, antislip operation, and motion-limiting movements of articulated elements for safer, more productive machines.

Read the whole story.


More on efficiency, reliability, control, and performance.



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