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Links 1 through 10 of 12 WHYPS's Bookmarks

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Directional control valves (DCV) are one of the most fundamental parts in hydraulic system. They allow fluid flow into different paths from one or more sources. They usually consist of a spool inside a cylinder which is mechanically or electrically controlled. The movement of the spool restricts or permits the flow, thus it controls the fluid flow.

But in a proportional valve it allow infinite positioning of spools, thus providing infinitely adjustable flow volumes. Either stroke-controlled or force-controlled solenoids are used to achieve the infinite positioning of spools.

An advantage of Proportional control valves when compared with ordinary “Bang-Bang” Directional Control valves are as follows.

Smoother operation of the system because the rate of opening and closing of the valve can be controlled by the amplifier. Self-switching conventional valves are available but they are difficult to setup and can give consistent performance.

The reduction of shock in the system can extend the life of hydraulic components, seals, coolers and filters, improve machine performance and product quality, reduce operator fatigue(noise, vibration and harshness)

Valves can be positioned for optimum hydraulic performance without regard to access for manual adjustment. This can also simplify machine design because of the removal of access restrictions

In proportional valves hydraulic remote control is possible, the use of proportional valves does away with the need to run high pressure hydraulic lines to the operators control station

Valves can be continuously adjusted during the machine cycle allowing flow or pressure to be precisely matched to the process requirements. This can significantly simplify that would otherwise have to use multiple (fixed setting) valves with selection via solenoid or cam operated valves

Accuracy and reputability of the total system can be improved by the use of electrical feedback transducers (position, force, velocity, flowetc.)and the signal to proportional valve can be automatically adjusted

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Volvo debuted the all-new flagship of its wheel loader range. The new L350H is the star of ConExpo. The new L50H has 10-percent improvement in fuel efficiency and also in design. It also has next-generation hydraulics fitted with it and is powered by a Tier 4 Final D16J engine, for high torque at low rpm. The ideal partner for quarry production, the L350H now comes with a higher capacity 7.3 cubic meters (9.5 cubic yards) rock bucket, for maximum performance.
- See more at: https://www.whyps.com/News/Hydraulic-industry-articles/volvo-ce-redesigned-l350h/72782

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This year Komatsu Autonomous Haulage Vehicle was the winner of Load and haul award. Unlike from its 930E and 830E autonomous models, Komatsu developed this vehicle exclusively as an unmanned vehicle. By distributing equal load to the four wheels, both when the vehicle is loaded and unloaded, and by adopting four-wheel drive, retarder and steering, the vehicle will be able to shuttle in both forward and reverse travel directions, thereby eliminating the need for K-turns at loading and unloading sites.

- See more at: https://www.whyps.com/News/Hydraulic-industry-articles/komatsu-mining-magazine-load-and-haul-winner/72774

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Parker 594TJ features the TOUGHJACKET™ Polyurethane cover for best abrasion resistance and is rated to 4,000 psi constant pressure for applications in the construction industry, especially for those working with telescoping boom applications requiring a durable and light weight bonded assembly solution. When bonded, these thermoplastic hose assemblies simplify the installation process, allow for a smooth operation and improve the overall strength and stability of the hose. Parker 594TJ is SAE 100R19 compliant and features four-spiral wire hose performance in a high tensile two-wire braid construction

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The i4.0 Upgrade Kit connects existing machines, modules or lines without sufficient connectivity to Industry 4.0 topologies. Their data can be automatically processed in superordinated systems and can be used for condition monitoring and data mining purposes. The implementation does not require any modifications of the existing automation solution. The web-based configuration of the i4.0 Upgrade Kit can be carried out without any specific programming skills.

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CAT Launched 980L Medium Wheel Loader
On January 20, 2017 CAT launched its all new 980L medium wheel loader, which boasts a number of new features over its predecessor. The new Cat® 980L medium wheel loader applies proven technologies systematically and strategically to meet our customers’ high expectations for reliability, productivity, fuel efficiency, and long service life. The new 980L medium wheel loader is more powerful and fuel-efficient than its predecessor, featuring significant drive-train and hydraulic-system refinement, operator safety and convenience enhancements, proven Z-bar linkage, Cat Performance Series buckets, and options such as automatic traction control, enhanced ride control system, and Cat Connect Technologies.

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