There are over 40 million acres of lawn across the United States, made up, primarily, of residential lawns, roadsides and golf courses. While many Americans maintain their own lawns, a growing number of contractors, landscapers and lawn care consultants are hired to do the job. For these working men and women, the more lawns maintained during the day, the more successful their businesses become. To mow faster and longer, specialized mowers are used to mow more grass with more precision.Transmissions: a driving force
As with any machine, a commercial mower’s primary function is to make a task easier, in this case, mowing grass. Via a network of hydraulic, mechanical, electrical and chemical processes, a mower is propelled by a simple push or pull by the operator. One such process is performed by transmissions, located near each wheel of the mower. These integrated drive systems pull power from the engine and create the torque and speed required to get a mower moving and to keep it moving. A combination of a hydraulic pump and motor can also be used if space allows.
For a smooth and comfortable ride, a quality drive system is required. Otherwise, the mower can begin to cog when the drive is placed under too large a load. Cogging can ruin the user experience and potentially result in a stuck mower. Nothing will set an operation back like stuck equipment.
Cogging can create problems for a user as the mower starts to move, but once the mower is in motion, the drive system’s job is not done. To maintain a fast, effective cut, a drive system must provide consistent power throughout a job. UCLA legend John Wooden said, “Be quick, but don’t hurry”. He used this sentiment while coaching his championship basketball teams, but the same can be echoed in the turf industry. Speed is important, but an ineffective cut, caused by an inferior drive system, wastes time.The gold standard
Parker’s HT Series is the pinnacle of drive systems in the turf industry. By coupling a Torqmotor and variable displacement pump, the HT Series delivers more power to the cutting deck, decreases fuel cost, and eliminates cogging. When used with Parker formulated HT-1000 transmission oil, oil change intervals are increased to 1000 hours; 2x longer than competitive drive systems. Find out more about this efficient drive system at parkerHT.com.
The Pump & Motor Division is a market leader in gear pump and low speed-high torque gerotor motors, that continues to blaze a trail in the industry by developing new technologies while maintaining the high level of service synonymous with Parker. Between its two locations in North Carolina and Tennessee, the division employs decades of industry experience to better serve you and your application.
Attending GIE 2019? Visit us in Louisville, KY October 16 – 18 at booth #10124 to see the HT transmission.
This article contributed by CT Lefler, marketing product manager, Pump & Motor Division, Parker Hannifin Corporation.
20 Sep 2019
The OEM landscape is continuously transforming. In a service industry that once focused on the tactical side of product function, the new shift now emphasizes on how to become the strategic revenue generator and competitive differentiator through the utilization of modern technological systems, such as IoT.
This pressure enhances the competitive environment, putting OEMs on a constant mission to expand their offerings and provide the best in class equipment to their customers to build new partnerships and enhance their current relationships. The key metric of this strategy is ensuring customer satisfaction. But we cannot simply neglect the importance of increased productivity, efficiency, and achieving appropriate returns on investment (ROI).
According to Bain’s projections, 6.8 million connected heavy construction machines will be shipped between 2018 and 2025. It is clear that the future largely depends on the Internet of Things (IoT) to power further data collection and analysis and overall innovation in the field. Yet this investment into IoT, like any strategic investment, must be assessed and the ROI is a critical measure before determining whether your organization should invest.
The top performance indicators for measuring the success of IoT for heavy equipment OEMs are:
Let’s take a look at how IoT can enhance an OEM's performance in these specific areas and how they connect back to the ROI attainment.
In today’s day and age, one of the most crucial aspects of obtaining an exceptional customer experience is to make sure that you are valuing and prioritizing the customers’ time. Predictive service helps address this problem. By utilizing IoT to forecast when a piece of heavy equipment may need repairs or service, even under unexpected circumstances, OEMs can better manage and accurately schedule downtime on machinery and equipment, ultimately delivering a better service experience to customers.
Better servicing not only leads to more satisfied customers, but it also provides operational gains. The benefit of an IoT solution for heavy equipment is that it helps the user better understand exactly what the problem is that needs to be examined from a remote location. This gives the technician a heads up and ensures they will have the right equipment, parts and skills to solve the issue and get things up and running again faster.
Providing accurate updates to service technicians also smooths over the process of meeting compliance requirements for companies with service level agreements. The embedded IoT sensors not only help with the predictive servicing on machinery, but they also enable automatic reporting on asset health and communicate when thresholds have been reached. This feature dramatically improves the chances of meeting SLAs.
In addition to remote monitoring, predictive maintenance detects possible failures ahead of time, so an OEM can take corrective action at the right time to avoid unscheduled maintenance and unplanned downtime, thus mitigating project risks and reducing costs. For an OEM, predictive maintenance data is useful in terms of quality issues. An OEM can track historical failure data so corrective action can be put in place to avoid unnecessary downtime for additional customers due to unforeseen quality issue.
Combining, storing, and analyzing heavy equipment data is the kind of ‘deep learning’ required to take predictive maintenance to the next level. Data gathered on a piece of heavy machinery allows OEM to go from predicting when a known failure mode might occur to preventing it. This new learning is then incorporated to improve engineering knowledge that in turn helps build better models. Taking this to the next level, as we better understand failure modes and their predictors, and collecting even more precious data on a per machine basis, can enable OEMs to model performance for individual machines in terms of operator utilization and environmental impact.
In addition to improving engineering and design concepts, OEMs can leverage data from an IoT solution for heavy equipment to create different types of equipment, with less simulation and modeling required. Using the real data from existing infrastructure, the options for finding new designs or even new uses for equipment can lead to new markets and new product lines for an OEM. This presents a massive opportunity for the OEM to ensure that they stay ahead of the competition.
OEMs realize that connected off-road equipment can help their customers reduce costs, increase productivity, and improve safety. These services not only add value for an OEM customer, they also increase brand loyalty, as other brands of equipment are not integrated with an existing IoT solution. Parker offers a customer-centric IoT solution, Mobile IoT, to meet the specific requirements of heavy equipment OEMs. As a result of implementing Parker’s Mobile IoT, OEMs are able to generate additional revenues not only from its data-driven offerings, but also from its core business through increased equipment sales and aftermarket services.
For OEMs, building an IoT platform in-house can be costly as well as require years of development. Working directly with Parker enables OEMs to benefit from comprehensive technology integration and data analytics expertise to create valuable machine designs for customers without the cost or risk of building out a solution in-house. Click here to learn more about how Parker is positively impacting OEMs around the world from an IoT perspective.
Article contributed by Clint Quanstrom, IoT general manager, and Kyri McDonough, marketing communications manager, Parker Hannifin Corporation.
Other related topics on Parker Mobile IoT solution:
19 Sep 2019
You may know that properly maintaining a hydraulic pump will ensure maximum efficiency and prevent damage, but did you know that it is especially critical to regularly monitor inlet conditions? Poor inlet conditions can result in cavitation—the second leading cause of pump failure.
What is cavitation and how can you prevent it?
While it’s common for people to think of a pump’s inlet as sucking in oil, in reality, it is atmospheric pressure doing the work. In essence, the weight of the atmosphere pushes the oil out of the reservoir and into a region of lower pressure—the inlet. Once the oil is forced from the reservoir and through the inlet, it then moves the volume of liquid into a region of decreasing volume to create flow. For this process to begin, there must be minimum pressure at the inlet of a hydraulic pump, as shown in the diagram below.
As you can see, the inlet of a pump plays a large role in how well it operates. Unfortunately, those designing and maintaining pump systems can become so focused on downstream flow that they overlook proper inlet maintenance. This can result in degradation of inlet function and serious problems such as cavitation.
Cavitation occurs when the absolute pressure on the inlet side of the pump is too low and air is drawn out of the solution, creating bubbles in the oil. As these bubbles get pushed around to the high-pressure outlet side of the pump, they collapse. This creates localized shock waves that blow bits of material out of the pump. It can also result in excessive heat and reduced lubrication that leads to friction and wear over time.
Cavitation can cause pump failure and it can damage other components of your system, which is why it is critical to examine the condition of the pump's inlet on a regular basis.
PSI versus PSIA. What’s the difference? PSI, or pounds per square inch, is a unit of measurement for pressure used in the United States. PSIA describes the absolute pressure in psi, including the pressure of the atmosphere. Absolute pressure is also referred to as total pressure.Maintaining steady-state hydraulic pumps
There are two areas you should monitor to maintain minimum inlet pressure on steady-state pumps:
In order for a pump to function, atmospheric pressure must be greater than Phase 1 pressure + NPSH. Every pump has its own specifications regarding acceptable minimum/maximum inlet pressure, but we can use the example below to illustrate how to calculate it.
To begin, assume that you are maintaining an 18 GPM hydraulic pump. The NPSH is equal to 12 PSIA with standard hydraulic oil and 1800 RPM per manufacturer’s specifications.
As you can see in the diagram above, the inlet line is 1.38” in diameter x 18.1” long with a 12.1” lift using standard petroleum-based fluid.
Each foot of oil lift requires approx. = 0.4 PSI. Fluid velocity is 3.8 feet per second. A typical lookup table shows there will be a 0.05 PSI drop due to the flow through the pipe.
Total loss of the inlet line during steady state is 0.4 PSI + 0.05 PSI, or 0.45 PSI. 14.7 – 0.45 = 14.25 PSI. Because this final number—14.25 PSI—is greater than the NPSH of 12 PSIA, you can rest assured the system is functioning well.
Maintaining variable-flow hydraulic pumps
If we apply the same numbers to a variable-volume pump, the result will be less acceptable. Here’s why: Imagine the pump is not in demand and is therefore being held off stroke, meaning there is no flow. When the pump is suddenly needed, it will come on stroke, requiring the column of oil in the suction line to accelerate. This sudden change in demand requires the pump pressure to accelerate from static to a pressure that is strong enough to move the oil and prevent cavitation.
Let’s look back at our model, applying revised numbers.
Assume the pump strokes on in 70 milliseconds (msec). The volume of liquid that has to accelerate is 1.5in^2 x 18.1” = 27.1 cubic inch (cu. in.). Note: Since the entire column of oil in the pipe has to accelerate, we used a measurement of 18.1” instead of 12.1”.
To calculate the weight of oil in the inlet line, we multiply the volume (27.1 cu. in.) by specific weight (0.0314 lbs./cu. in.), equaling 0.85 lbs. Fg (gravity force) = 0.85 lbs.
Fa = mass x acceleration
a = v/t = 3.8/0.07 = 54.3ft/sec^2
Fa = (0.85/32.2) x 54.3 = 1.4 lbs.
Ft = 0.85lbs + 1.4 lbs. = 2.25 lbs.
The available force in the pipe from the atmosphere (Fluid power (Fp)) = 14.7 PSIA x 1.5 sq. in. = 22.05 lbs.
Net force = 22.05 lbs. – 2.25 lbs. = 19.8lbs.
NPSH = 19.8 lbs./1.5 in.^2 = 13.2 PSIA
These calculations reveal that the system is fine, because the pump requires a minimum 12 PSIA at its inlet to operate effectively. However, if this system was installed at 2,300 feet above sea level (13.4 PSIA), the pump would cavitate whenever it came on stroke.
13.4 PSIA x 1.5sq in = 20.1lbs
20.1 lbs. – 2.25 lbs. = 17.85 lbs.
17.85 lbs./1.5 in.^2 = 11.9 PSIA, which is lower than the minimum 12 PSIA required.
The above example assumes no losses due to other plumbing, however, it is not uncommon to see elbow fittings on pump ports, which could add to losses in the inlet line.
Other design considerations
In addition to maintaining good inlet conditions, any small leak on the inlet will entrain air, which is also bad for the pump. Small leaks will cause a pump to lose prime whenever the system is shut off, which means it will start dry and run dry until prime is re-established. For this reason, it is never a good idea to install hydraulic pumps above the fluid level. Rather, hydraulic systems designs should ensure that the pump inlet is flooded, i.e. the oil level is above the pump inlet. A ball valve can be used to isolate the pump from the reservoir in case it needs service, and a limit switch can be used on the ball valve to prevent the system from running if the ball valve isn’t fully open.
For more information on hydraulic inlet maintenance or other topics, email us. Your pump will thank you.
This article contributed by Tim Beck, manager - system design and application, Parker Hannifin Corporation Hydraulic Pump and Power Systems Division.
26 Jul 2019
Doing more with less is a common theme in business and the pump market for medium-duty applications is no exception. With the overall hydraulic system size becoming increasingly smaller and smaller, mobile, medium-duty end-users in industries such as oil & gas, construction, agriculture, transportation and material handling industries are in search of a flexible, high-performance compact pump.
With two hydraulic pump loop options, open circuit or closed circuit, a closed circuit loop saves valuable system space by offering continuous fluid flow without the need for additional parts. In comparison, an open circuit loop typically requires a larger reservoir and as a result, increases the system’s footprint. To fulfill the market’s need for smaller hydraulic components, Parker recently introduced the PC3 Compact Closed Circuit Pump. This article explores three primary benefits of the PC3 pumps:
1. Compact size
On trend with hydraulic mobile systems decreasing in size, each system component has to do more in order to save valuable system space. PC3 is a solution for this market trend with a closed-circuit design, resulting in fewer components than an open circuit hydraulic pump. In addition to the closed-circuit design, it also offers a built-in bypass valve and hot oil shuttle valve eliminating the need for third-party components, conserving valuable system space.
2. System efficiency and streamlined performance
To achieve greater system efficiency and streamlined performance, PC3 includes a variety of features, such as:
- A hydraulic pressure override to ensure that the prime mover is not loaded in excess
- A built-in hot oil valve to increase operational efficiency and reduce system complexity
- Cross port reliefs to prevent system overload by limiting the maximum pressure in your system
Each of these features ensure system performance and efficiently deliver the exact power required for each unique application.
Finally, Parker’s PC3 offers the hydraulic pump market flexibility through various product features and sizes to use in a wide variety of applications.
PC3’s modular and interchangeable controls include options for a manual servo, hydraulic proportional and electric proportional controls, providing end-users with further customizations.
In addition, the product line offers ten standard displacements options: 7, 11, 18, 20, 25, 30, 35, 40, 45, 52 and in three different frame sizes to help customer choose the best option for their medium-duty applications ranging from turf care to transportation.Resources
When designing hydraulic systems for mobile equipment, getting the right pump is crucial. Resources are available to help ensure the right selection is made—use an online configurator for assistance in selecting the best compact closed-circuit pump for the application. Full system supplier such as Parker can also assist with overall system designs that optimize all of the components to work together. For more information, contact us.
Article contributed by Justin Wheeler, product manager, Hydraulic Pump and Power Systems Division
24 Jul 2019
Bain’s projections show that the Internet of Things (IoT) market will grow to $520 billion in 2021. Specific to the construction market, 6.8 million connected heavy construction machines will be shipped between 2018 and 2025. Although no one in the industry has a crystal ball, it is predicted that the future of mobile IoT will be driven by machine learning and 5G networks to power further data collection and analysis, enable autonomous equipment operation and overall innovation in the field.
Technology that can remotely analyze millions of points of data in real time, make decisions and report on the data as necessary will enable machine intelligence to begin moving from the cloud to the machine itself. For instance, a recent case study by Parker’s Mobile IoT team illustrates how an OEM was able to improve their time-to-service, hydraulics-related efficiencies and customer loyalty with the use real time diagnostics and over the air programming. This is by contrast to the current method of telematics systems sending limited data to a server based on thresholds and events.
The basis of competition is changing for OEMs, and it's important for organizations to monitor the basic assumptions of competition to redefine the space going forward. For the longest time, the industry was based on driving machines through engine power, however, electrification is changing how an OEM manufactures off-road equipment. Electrification, as well as remote monitoring, positively impacts the priorities during the engineering process such as the safety element. Furthermore, off-road machines have been operated by people for decades but with the development of robotics and other autonomous capabilities, those assumptions are changing. Electrification reduces the safety concerns centered around hydraulic and autonomous machines can eliminate the human safety factor during operation.
Semi-remotely operated or semi-autonomously operated equipment opens up a host of possibilities in terms of machine design. But when you understand how connected machines will be sold or distributed, OEMs are not only looking at selling products but at offering services that can be remotely monitored, controlled or operated. This opens us up to a whole host of things in terms of business models. As part of Parker’s Tech Tuesday video series, Parker’s Business Unit Manager for Mobile IoT discusses the trend of IoT for off-road equipment and how the business model is evolving.
The challenges of autonomous machines in off-road industry
Although the push towards autonomous equipment follows in the path of the automotive industry, the challenges for autonomous machines in areas such as construction and agriculture differ from automotive. The environments these machines operate in lack lane lines, signage, sidewalks and other indicators that automotive vision systems rely on to guide cars. The additional “appendages” of booms and buckets must also be taken into account for their operation. In sectors like mining, autonomous equipment is highly attractive. It can take hours to properly ventilate an area after blasting to make it safe for operators to enter. Removing humans from that equation will increase productivity and safety in operation.
It will take time for this technological evolution for the off-road industry to occur, though, due to the uncontrolled environments in which off-road equipment is typically used. More advanced Artificial Intelligence (AI) will be required than what is currently available. The future of mobile IoT lies in building the fully connected environment where all elements of the contractor’s job are seamlessly integrated.Applying artificial intelligence
With AI, users can learn patterns that lead to failures or how to operate the equipment to maximize its useful life, offering trade-offs between performance and longevity.
According to the Association of Equipment Manufacturers (AEM), AI will empower construction teams to handle critical tasks but there are challenges that must be overcome in order to achieve widespread adoption, including fear among workers of AI taking away their jobs, cultural resistance to new technologies and security. These are challenges that OEMs, suppliers and AI partners are already addressing in order to move their industries forward.
Embedded IoT systems rely on cellular communication technology. As 5G networks are being rolled out, it’s clear that they will change the way that data is transmitted via IoT systems. With the coming of 5G, telematics companies have spearheaded the development of Vehicle-to-Vehicle (V2V) and Vehicle-to-Infrastructure (V2I) communications capabilities. This sophisticated level of machine-to-machine (M2M) communication will be critical to autonomous vehicle operations. It would very difficult to implement to implement autonomous today given so few data points going to the cloud. Data being sent to the cloud today is limited, simply because of the cost to not only send it, but to store it, process it and then drive decisions with it. The promise of 5G is the ability to send a lot more data with less latency, which will enable more real-time operations such as streaming video and the other necessary functions for autonomous mobile equipment.Transformation of job responsibilities
In the future off-road machine operations will change from being hydraulic driven to more electrical driven, to more software driven. That means that our industry, not only in designing machines but also building, and servicing, and maintaining the machines is going to have to migrate to a having talent that is capable of operating in that software digital space. That's why you see a lot of companies in our space starting to hire more and more software engineers.. The addition of an IoT solution is positively impacting job responsibilities by increasing efficiencies at the same time IT job titles within OEMs are becoming more and more necessary to support IoT, electrification and the development of autonomous operated equipment.
Holistic approach to adopting digital technologies
The introduction of digital technologies in the off-road equipment industry is here. Therefore, organizations need to consider the following technology roadmap:
Digital disruption has already made multiple industries more competitive. Similar situations will be faced by the off-road equipment industry when digital technologies become more broadly leveraged. Traditional operational and service-related tasks need to be executed faster and more efficiently, and mobile IoT solutions can help.
Article contributed by Clint Quanstrom, IoT general manager, Motion Systems Group, Parker Hannifin Corporation.
16 Jul 2019
The design and deployment of aerial lifts, truck-mounted cranes, telehandlers, scissor lifts, man lifts and other modes of vehicular material handling demands two requirements above all others:
Safety for the operators
Operational integrity for the vehicles
Achieving these dual goals requires constant monitoring of out-of-level conditions. For three-quarters of a century following the Industrial Revolution, analog technologies addressed this challenge with visual indicators at each axis, which an operator then had to diligently monitor, making mechanical adjustments to ensure personal safety and the safety of the load—a task that required extreme vigilance and precise execution.
By the last decades of the 20th Century, electronic controllers powering audio signals and flashing lights had arrived on the scene to help reduce a handling system’s dependence on the operator’s monitoring of individual gauges for each axis of control. Many of today’s material handlers continue to rely on such electronically powered alert systems.
But with the advent of the Internet of Things (IoT) and the near-limitless interconnectivity possibilities it presents, a seismic shift has occurred in material handling control. The Universal Tilt Sensor (UTS) technology was specifically designed to optimize operator and load safety while facilitating interconnectivity.
Download the Universal Tilt Sensor Technology white paper and learn how smart sensor technology optimizes operator and load safety while facilitating interconnectivity through the IoT.
OEM designers benefit from open protocol connectivity
Universal Tilt Sensors operate over a CAN bus using an industry-standard SAE J1939 communication protocol and an integral Deutsch DT four-pin connector. With UTS, OEM designers can deploy one product to achieve single, dual or three-axis mobile control, while it's plug-and-play connectivity with a full range of Parker hydraulics and electronic control components ensures system-compatible data collection, monitoring, and alerts. The communication scheme also facilitates daisy-chain-style single-harness configurations that reduce exposure to accidental cutting and pinching and other operators or environmentally induced damage.
For OEMs and their customers, this means one single part can perform the many functions that formerly required a multitude of individual products, slashing inventory requirements, simplifying both installation and replacement, as well as reducing related labor.
Compactness and versatility
UTS technology features a low-profile form and three slightly offset mounting holes around its diameter that make it easy to install and remove, even in challenging field conditions. This fool-proof mounting profile ensures the UTS is properly and consistently mounted across a vast array of machines while enabling a full range of horizontal, vertical and angular mounting positions.
Meets robust and reliability
UTS technology features glass-filled hybrid-plastic construction with no moving components and is designed to resist corrosion and vibration. Its robust sensor technology can withstand rugged material handling environments. With a spin weld design and a sealed connector, environmental protection for outdoor as well as indoor applications is ensured. The UTS is rated IP68/IP69k in all orientations, and IP68 upside-down. For lifts working around electric or magnetic fields, UTS provides effective insulation against electromagnetic and electrostatic interference, meeting or exceeding EMI and ESD ISO environmental protection standards. In addition, customers who have field tested the UTS reported it providing predictable linearity over its specified operating temperature range (-40°C to 85°C) and without deviations experienced with competitive products.
Where the IoT connectivity comes into play
Perhaps most exciting of all is the infinite possibilities for connectivity possible using UTS technology. This closed-loop electro-hydraulic solution communicates over an open, industry-standard protocol, enabling plug-and-play IoT connectivity to controllers, hydraulic components, data collection, and reporting software, as well as to the entire family of Parker hydraulic and electronic products and accessories.
Design engineers, OEMs, and operators new reality
Ladder engines using UTS for auto leveling and boom elevation transmitting operational behavior back to an OEM design team, which they can use to analyze safety-lapse trends and improve next-generation vehicles
Refuse trucks, dump trucks or forestry equipment operating on steep inclines transmitting individual route profiles back to the home office to identify problem areas and improve safety training
Material handlers transmitting information on operator behavior to spot and intervene when irresponsible handling repeatedly requires override intervention
Every mobile hydraulic vehicle’s field performance being monitored by OEMs to facilitate warranty reviews and reduce liability
Bringing this all together
As more and more components and processes attempt to leverage the IoT, UTS technology will become a drop-down configurable component within an increasingly complex, interconnected system that:
Promotes operator safety
Optimizes equipment performance
Provides comprehensive reporting for analysis and improvement
Increases productivity through predictable maintenance and improved uptime IoT connectivity
Improves customer satisfaction and loyalty through proactive data-driven service engagement
Selectively shares data across distribution and supply channels
Download the Universal Tilt Sensor Technology white paper to see the UTS technology solution in action from a multi-angle standpoint and operational point-of-view.
Article contributed by Marcel Colnot, regional application engineer, and Chase Saylor, product manager - sensors,
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16 Jul 2019