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Selecting and Sizing Electromechanical Screw Jacks to Replace Hydraulic Lifting Systems

There is a widespread push in North America to replace hydraulic lifting systems with electromechanical systems. This trend has been going on for many years in Europe and is now really taking hold in North America. Many engineers are now tasked with the job of eliminating environmentally unfriendly hydraulic oil with systems that are purely electromechanical. When making this changeover, a number of important factors need to be considered to make sure the new design will work properly, efficiently, and reliably over the life of the system. This webinar will walk you through the critical engineering factors that need to be considered and then will create a multi-jack lifting system complete with the performance data, 3D drawings and bills of materials. Webinar Courtesy of DieQua
www.powertransmission.com/sc/diequa-screw-jacks/

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1 Study of Multiple-Point Oil-Jet Lubrication of High-Speed Ball Bearings (June 2014)

The air-oil, two-phase flow inside the multiple-point, oil-jet lubrication ball bearing was studied based on CFD (computational fluid dynamics) theory and technique, and compared with single-point, oil-jet lubrication. The results indicate that the air-oil distribution inside the bearing with multiple-point, oil-jet lubrication is more uniform than single-point injection.

2 FZG Gearboxes Lubricated with Different Formulations of Polyalphaolefin Wind Turbine Gear Oils (August 2016)

In order to analyze the different gear oils suitable for the lubrication of wind turbine gearboxes, five fully formulated ISO VG 320 gear oils were selected. In between the selected gear oils, four PAO base oils can be found: PAOR, PAOM, PAOC and PAOX. A mineral-based oil (MINR) was also included as reference.

3 Recalibrated Equations for Determining Effect of Oil Filtration on Rolling Bearing Life (September 2015)

In 1991, Needelman and Zaretsky presented a set of empirically derived equations for bearing fatigue life (adjustment) factors (LFs) as a function of oil filter ratings.

4 Global Industrial Outlook: Oil Slick, Currency Headwinds Worsen (April 2015)

End market conditions for the power transmission industry continue to worsen. With the Euro down 13% year to date and U.S. oil production surging we are seeing increasing headwinds, if not storm clouds, for the sector.

5 Understanding the Dynamic Influences of Gear Oils and Radial Shaft Seals (February 2018)

Sustainability is becoming one of the most important aspects within the power transmission business. Users demand low-maintenance drive systems with as little disruption as possible, and expect lifetimes of more than 10,000 hours. Approximately 40 percent of long-term gearbox leakages can be traced back to poor interaction between the radial shaft seal (RSS) and the lubricant. Thus, it becomes essential to analyze the tribological system as a whole, which includes the gear oil, seal grease (if required), elastomer material and design, and the shaft.

6 Minimum Design Speed Considerations for Sleevoil Bearings for Industrial Fan Applications (September 2016)

Slow speed operation of fan systems within the air handling industry is generally performed due to two reasons: a coast down operation is required for hot (induced draft) fans to cool down before shutdown (often by using a turning gear), and operational efficiency improvements can be achieved during non-peak periods by slow speed operation using a VFD. In either case, when these fans are supported by hydrodynamic bearings, it is the oil film thickness developed from the bearing-shaft interaction that limits the minimum speed that can be maintained without causing premature wear and bearing failure. This paper will present a brief overview of lubrication theory and critical design parameters to achieve slow speed operation.

7 Global Industrial Outlook: Oil Slick Cascading Through Sector (December 2015)

Third-quarter earnings are confirming the worst-case scenario, i.e. — not only are energy related end markets in a downturn, but conditions continue to worsen.

8 Experimental Determination of Oil Rheology Parameters to be Implemented in Power Loss Predictions of Gears and Rolling Element Bearings (April 2019)

Rheology models express the way tribological conditions translate to shear stress of the lubricant and friction force on the interacting surfaces. Due to the complexity of the lubricant rheology, the friction coefficient is usually obtained experimentally either under the same operating conditions or by curve fitting in a properly chosen friction map. The current study aims at determining the rheological parameters of a lubricant based on friction measurements carried out on a commercial, readily available ball-on-disc machine.

9 Trends in Industrial Gear Oils (April 2013)

With today's smaller, hotter - and overloaded - machinery, specifying the correct lubricant is vital.

10 Global Industrial Outlook: Game Changer (September 2015)

The number one question today is: are the current low oil prices a near-term or structural development?

11 Preventing Roller Bearing Failure (December 2015)

I’m building a custom gearbox with 7075 T-6 spur gears, and I’m concerned that aluminum flakes will enter the races on the roller bearings (SKF 2307) and cause premature failure. So my question is — should I place an oil seal on the shaft first to protect the bearing — or is this an unfounded concern and I should mount the seal in the typical manner outside the bearing? Or both? Or go with a sealed bearing? I’m confused and could use your expertise, please.

12 Oscillation Welding Protects Pipelines (April 2010)

Ball screw assemblies are key to this patent-pending oilfield corrosion prevention solution.

13 Global Industrial Outlook: Batten Down the Hatches (February 2016)

Third-quarter earnings confirmed the worst-case scenario — plunging oil prices are whacking almost the entire industrial sector. The theme is hardly new, as the pattern of our headlines has revealed over the past fifteen or so months:

14 Gear Lubrication: Long-Term Protection for Wind Turbines (April 2014)

The chemical and physical properties of gear oils may change, depending - more or less - upon their formulation and the environmental conditions under which they are used. This is why - after three years of use in a wind turbine - a gear oil was examined to determine if indeed changes were evident and if the protection of the gears and rolling bearings still met the same requirements as would be expected of fresh oil. Our findings revealed that the existing gear oil - as well as its ability to protect the gears and rolling bearings - had degraded very little compared to fresh oil.

15 Global Industrial Outlook: Houston, We Have a Problem (December 2014)

With two armed conflicts underway impacting economic performance in Eastern Europe and the Middle East, we continue our investment stance of “Buy on the Sound of Cannons — Selectively” — but readers of Power Transmission Engineering should not be sanguine. Geopolitics is beginning to exert significant pressure on several end markets: I specifically refer to oil price. West Texas Intermediate or WTI has dropped from its $95-105 trading range in late spring to about $75 — about a (25%) drop despite wo ongoing conflicts because of excess supply.

16 Global Industrial Outlook: Reality Sinks In (March 2016)

Our “Batten Down The Hatches” call proved timely as the market sold off by about (10 percent) before staging a partial recovery

17 Slicing Downtime (March 2016)

An independent cheese packager in central Wisconsin packages millions of pounds of cheese every year. Whether shredded, sliced, crumbled or waxed, each package is designed specifically for a customer’s unique needs. As a “toll processor,” production line speed is critical to productivity as well as profitability.

18 Industry News (March 2016)

News from around the industry

19 Product News (October 2018)

The complete Product News section from the October 2018 issue of Power Transmission Engineering.

20 Keeping Production Running (April 2019)

Cement Backer Board Plant Utilizes Oil Shear Clutch Brake

21 Force Control Assists in Helicopter Transmission Overhaul (December 2017)

Oil shear brake technology is the key to quick and reliable test stand development.

22 Product News (October 2010)

The complete Product News section from the October 2010 issue of Power Transmission Engineering.

23 Improving Equipment Uptime - Composite Seals Meet the Challenge (October 2009)

In an industrial application, equipment uptime is vital for on-time performance and profitability. The rotating members of industrial machines are subject to the highest degree of wear and are more susceptible to failure than non-moving parts. Bearing surfaces are the most critical and often the most expensive portion of the rotary assembly; it is imperative to protect these components. The primary protector of these components is the industrial seal.

24 Product News (April 2009)

The complete Product News section from the April 2009 issue of Power Transmission Engineering magazine.

25 Product News (August 2008)

The complete product news section from the August 2008 issue of Power Transmission Engineering.

26 Product News (October 2012)

The complete Product News section from the October 2012 issue of Power Transmission Engineering.

27 The CHIEF Issues - Global Industrial Outlook (February 2014)

Global economic activity remains good -- noise about China slowing, notwithstanding -- and despite the ObamaCare debacle, non-Christmas-related consumer spending looks pretty good. Europe is still Europe and China continues to grow 7-8 percent -- even as the government seeks to clamp down on its own shadow banking system. And India remains a mess.

28 Industry News (December 2015)

News from around the industry

29 Braking the Cycle (August 2015)

Tucked away in the southwest quadrant of the state of Georgia, amid stately pine stands, pecan farms and cotton fields, sits Oak Crest Lumber.

30 No Time to Kill for Barge Operation (August 2014)

The scene is serene and picturesque. Sunshine reflects off the light chop of the Ohio River, as a barge winds its way into view. While those driving along Louisville’s River Road may be inclined to reach for a camera to capture this idyllic scene, the mood at Nugent Sand Company is anything but tranquil.

31 Product News (Fall 2007)

Latest Product News

32 Intermetallic Nickel-Titanium Alloys for Oil-Lubricated Bearing Applications (August 2009)

Nitinol 60 (60NiTi), an intermetallic nickel-titanium alloy containing 60 wt % nickel and 40 wt % titanium, is shown to be a promising material for oil-lubricated, rolling and sliding contact applications such as bearings and gears.

33 Boilermakers Announce Bearing Technology Breakthrough (June 2013)

Student research project at Purdue could revolutionize predictive bearing failure.

34 Load Capacity and Efficiency of Grease-Lubricated Worm Gears (September 2014)

Varying installation requirements for worm gears, as, for example, when used in modular gear systems, can necessitate grease lubrication - especially when adequate sealing for oil lubrication would be too complex. Such worm gears are being increasingly used in outside applications such as solar power plants and slew drives. While knowledge about the operating conditions is often appropriate, the basic understanding for load capacity and efficiency under grease lubrication is quite poor. Investigations done at FZG and sponsored by FVA/AiF are shown here to give an impression of the basic factors of load capacity and efficiency. The results of the investigation indicate a satisfying quality of calculations on heat, load capacity and efficiency based on characteristic parameters of the base oil with only slight modifications to the methodology known from DIN 3996 or ISO TR 14521.

35 Global Industrial Outlook: Oil Slick, Currency Headwinds Challenge Growth (March 2015)

End market conditions for the power transmission industry have arguably worsened since our last column. In December we stated that with two armed conflicts underway impacting economic performance in Eastern Europe and the Middle East our stance was “Buy on the Sound of Cannons…. Selectively” while cautioning PTE readers not to be sanguine.

36 Global Industrial Outlook: Kind of Sluggish (August 2015)

We anticipate no substantive improvement in manufacturing activity. Not in the U.S. or internationally. If anything, headwinds may have become slightly more pronounced because a U.S. — Iran “deal” that everybody hates except a) the Iranian government and b) the Obama administration will result in the release of Iranian oil supply back onto the global market. Oil had rallied from about $50 to $60 over the past month (I like round numbers), but has since roundtripped. Expect further, deeper capital spending cuts in the U.S. oil sector to continue affecting demand for large capital equipment.

37 CFD Simulation of Geared Transmissions with Injection Lubrication (August 2019)

In this study, a finite volume CFD simulation model of a single-stage injection-lubricated test gearbox was applied to investigate its oil flow and no-load power loss. The results provide physically plausible information on the oil supply and its distribution.

38 Is Splash Lubrication Compatible with Efficient Gear Units for High-Speed Applications (October 2015)

A thermo-mechanical model of a splash lubricated one-stage gear unit is presented. This system corresponds to a first step towards the design of a hybrid vehicle gearbox that can operate up to 40,000 rpm on its primary shaft. The numerical model is based on the thermal network method and takes into account power losses due to teeth friction, rolling-elements bearings and oil churning. Some calculations underline that oil churning causes a high amount of power loss. A simple method to reduce this source of power losses is presented, and its influence on the gear unit efficiency and its thermal capacity is computed.

39 Global Industrial Outlook: Weathering the Storm (October 2015)

We just returned from WEFTEC — the premier U.S. water and wastewater management show. Our recent discussion (Game Changer) highlighted the negative impact of low oil prices.

40 An Open-And-Shut Case: Greases for Gear Applications (September 2016)

For the lubrication of open gear drives used in different industrial applications such as cement and coal mills, rotary furnaces, or where the sealing conditions are difficult, semi-fluid greases are often used in preference to fluid oils. For girth gear applications the greases are used with a splash or spray lubrication system. The selection of such greases influences pitting lifetime and the load-carrying capacity of the gears, as well as wear behavior

41 Lubrication of Plastic Worm Gears (August 2019)

In the selection of lubricating greases for plastic worm gears, the user needs to know the influence of each grease constituent on the tribological performance in order to choose the appropriate lubricant. In this work, the effect of NLGI class, viscosity, base oil and thickener type are investigated separately regarding the efficiency and temperature close to the tribocontact. With the help of this contribution the user understands the effect of each parameter and learns about the potentially reachable efficiency and temperature ranges.

42 Gear Design Effects on Performance of High-Speed Helical Geartrains as Used in Aerospace Drive Systems (March 2016)

The performance of high-speed helical geartrains is of particular importance for tiltrotor aircraft drive systems. These drive systems are used to provide speed reduction/torque multiplication from the gas turbine output shaft and provide the necessary offset between these parallel shafts in the aircraft. Four different design configurations have been tested in the NASA Glenn Research Center, High-Speed Helical Geartrain Test Facility. The design configurations included the current aircraft design, current design with isotropic superfinished gear surfaces, double-helical design (inward and outward pumping), increased pitch (finer teeth), and an increased helix angle. All designs were tested at multiple input shaft speeds (up to 15,000 rpm) and applied power (up to 5,000 hp). Also two lubrication, system-related, variables were tested: oil inlet temperature (160–250° F) and lubricating jet pressure (60–80 psig). Experimental data recorded from these tests included power loss of the helical system under study, the temperature increase of the lubricant from inlet to outlet of the drive system and fling-off temperatures (radially and axially). Also, all gear systems were tested with and without shrouds around the gears.

43 High-Performance Industrial Gear Lubricants for Optimum Reliability (October 2010)

In recent years, gearbox technology has advanced and original equipment manufacturers (OEMs) have specified required gear oils to meet the lubrication requirements of these new designs. Modern gearboxes operate under severe conditions while maintaining their reliability to ensure end-user productivity. The latest generation of industrial gear lubricants can provide enhanced performance—even under extreme operating conditions—for optimal reliability and reduced cost of operation.

44 Who Needs a Social Life When You Can Mine the Moon (February 2009)

Dust, soil broken rock and other related materials that blanket planetary surfaces—known as regolith—have great potential to contribute to space observation research, but the physical properties of lunar regolith are unique and very difficult to excavate from a technical perspective. A group of students at the Missouri University of Science and Technology, dubbed the Lunar Miners, decided to step up to the plate—that is, by entering the 2008 NASA Regolith Excavation Challenge.

45 Quiet Out There - Global Industrial Outlook (August 2013)

Since our last appearance in this space we've attended the Paris Air Show and met with companies involved in oil production, hydraulic fracturing and wind turbine towers and components. As an investment analyst I am always seeking to help my clients anticipate change in order to manage risk and capture alpha (positive returns relative to market). But as a regular columnist for Power Transmission Engineering, I also seek insights that can help your organization do the same. Here is what we've found...

46 Grease Lubrication Mechanisms in Rolling Bearing Systems (October 2013)

Grease lubrication has clear advantages over oil lubrication: Grease does not leak easily; it has sealing properties; and it protects bearing surfaces from corrosion. Its disadvantages are grease-life limitations and a limited cooling ability. Moreover, in some applications there is a risk of grease starvation, which leads to reduced lubricating films. However, if the right grease, sealing system and/or lubrication system are chosen, then grease lubrication offers clear benefits. This article summarizes aspects of grease lubrication mechanisms in rolling bearings.

47 The Reluctance Motor Springs Forth (August 2014)

There are three major types of reluctance motors: all three reluctance motors are non-permanent magnet, brushless motors. They are synchronous motors with a non-linear relationship between torque and current. The variable-reluctance step and switched-reluctance motors utilize the principle of magnetic attraction by inducing magnet poles within the soft-iron rotor, and by energizing a set of coils wound around stator teeth resident in the laminated stator. These two reluctance motors must be sequentially excited to achieve continuous, steady-state rotation. The design of all reluctance motors requires finite element analysis (FEA) software.

48 Calculation of the Efficiency of Worm Gear Drives (June 2015)

This paper presents a physically grounded calculation method to determine the efficiency of worm gear drives. This computation is based on the Institute of Machine Elements, Gears, and Transmissions (MEGT) tribological simulation, which can determine the local tooth friction coefficients (Ref. 1). With this knowledge other power losses such as the bearings, oil churnings and seals power losses can also be calculated.

49 Wind Turbine Field and Test Rig Testing as Part of the Design Process for Gearboxes (September 2014)

The growth of worldwide energy consumption and emerging industrial markets demands an increase of renewable energy shares. The price pressure coming from coal, oil, nuclear and natural gas energy - combined with enormous worldwide production capacities for components of wind turbines - make wind energy a highly competitive market. The testing and validation of gearboxes within the test rig and the turbine environment attract a strong focus to the needs of the industry. The following contribution sums up the typical process requirements and provides examples for successful system and component verifications based on field measurements.

50 Global Industrial Outlook: Slow Growth Ahead; Farm Belt No Help (June 2015)

First quarter results confirmed our view. Capital expenditures are being slashed in the oil sector, the stronger U.S. dollar is enabling Japanese machinery competitors to gain share in the Middle East and Latin America, and lower soft commodity prices translate into a continuing North American decline in demand for farm equipment.

51 Leaky Shaft Seals (June 2016)

conveying system on the varnishing line for a manufacturer of high-end kitchen cabinets were leaking. Oil was dripping on the cabinet parts — ruining the finish. Why were half of the gearboxes leaking?

News Items About oil

1 Trelleborg Offers Sealing Solutions for Oil and Gas Industry (May 1, 2012)
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2 Moticont Offers Low Inertia, High Precision Voice Coil Motor (August 22, 2018)
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3 H2W Technologies Offers Miniature Voice Coil Actuators (July 21, 2016)
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4 Cicoil Designs Cables for Submersible Vehicle Applications (January 4, 2013)
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5 Amacoil and Uhing Announce Flange Detection System (October 12, 2012)
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6 Amacoil Uhing Drives Offer Set Screw Option (January 26, 2016)
Amacoil Inc. now offers an option on Uhing rolling ring level winding drives which enables users to spool cable, and other materials, wit...

7 Amacoil Expands Linear Drive Nut Line (April 5, 2013)
Amacoil/Uhing has expanded its line of Model RS rolling ring linear drive nuts with the new RS8 drive. The new unit runs on an 8 mm diame...

8 Amacoil Announces Linear Speed Control Option (October 29, 2013)
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9 Amacoil/Uhin Elasto-Ring Washer Reduce Pressure Between U-Clip and Flange (July 21, 2015)
Amacoil/Uhing recently introduced the Elasto-Ring washer for use with U-Clip quick release shaft collars. Elasto-Ring installs by hand wi...

10 Cicoil Offers Flexible Cables for Oil Drilling Operations (April 10, 2012)
Cicoil's Highly Flexible Silicone Cables are designed for extreme temperatures (-65 °C to +260 °C), punishing weather and&nbs...

11 Amacoil-Uhing Introduces Easylock Shaft Collars (January 27, 2014)
Amacoil/Uhing has introduced Easylock shaft collars which hold reels, spools and other objects in place on shafts. Objects are held firml...

12 Amacoil/Uhing Offers Traversing Drive Assembly (August 30, 2011)
A traversing drive assembly from Amacoil/Uhing enables an automatic increase or decrease in travel distance without requiring programming...

13 Amacoil’s Load Platform Relieves Radial Forces on Linear Drives (August 9, 2007)
Amacoil offers a linear bearing slide option on drive assemblies to protect rolling ring bearings in Uhing linear drives from undue wear ...

14 Cicoil’s Custom Shaped Flat Cables Eliminate Problems Caused by Precise Routing (August 6, 2007)
For space-sensitive electronics, Cicoil features custom shaped flat silicone cables. The custom shaping allows for very precise cable rou...

15 Cicoil’s High-Flex Cables Resistant to Water (June 13, 2007)
Cicoil's silicone cables offer improved environmental protection, including superior water resistance. According to the company's...

16 Vectron's Viscosity Sensor Detects Oil Change in Gearbox (May 29, 2007)
The low shear ViSmartâ„¢ viscosity sensor from Vectron International was recently used to collect real-time viscosity data in an oil-aging ...

17 Amacoil Guide System Offers Smooth, Even Spooling (September 1, 2010)
The Amacoil/Uhing GS Guide System helps assure smooth, even spooling by keeping the wire or other material being spooled in-line between ...

18 SiliKroil Provides Long-Lasting Lubrication (September 23, 2010)
Kano Laboratories Inc., located in Nashville, TN, recently released a successful blending of Kroil and dymethyl silicones called SiliKroi...

19 Long-Lost Space Cable Returns to Cicoil (February 3, 2016)
Almost 50 years after an Apollo Spacewalk, a long-lost flat cable harness returned back home to Cicoil. The “bio-harness” ass...

20 Equipment Solutions Offers Voice Coil Stage (March 11, 2011)
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21 Amacoil Releases Parts-Scanning Platform (October 14, 2010)
Amacoil has designed a parts scanning platform that moves in a reciprocating motion pattern using the Uhing linear drive. The linear...

22 Cicoil Offers Silicone Cables for Wind Applications (March 16, 2012)
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23 Cicoil Opens New Sales Office in South Carolina (October 27, 2015)
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24 Amacoil Uhing Drive Nuts Run on Threadless Shaft (November 18, 2016)
Amacoil-Uhing Model RS drive nuts provide smooth backlash-free linear motion in machine design. Unlike a screw, the RS drive nut runs on ...

25 Moticont Offers Miniature Voice Coil Motor (October 31, 2016)
The miniature Linear Voice Coil Motor, LVCM-022-013-01, from Moticont features a high force-to-weight ratio of 14.5 oz. (4.0 N) continuou...

26 Amacoil Introduces Precision Linear Motion Drive (August 24, 2018)
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27 SEPAC Clutch Series Delivers Reliable Torque in an Oil Atmosphere (March 1, 2017)
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28 H2W Technologies Offers High Torque Voice Coil Actuators (July 5, 2018)
H2W Technologies has developed several high torque rotary voice coil actuators, otherwise known as a limited angle torque motors or LAT...

29 Moticont Introduces Voice Coil Motor (May 14, 2018)
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30 Sulzer Offers Key Components at Argentina Oil and Gas Expo 2017 (October 5, 2017)
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31 Moticont Linear Voice Coil Motor Offers High-Speed and Reliability (December 28, 2018)
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32 Amacoil Uhing Introduces Linear Motion Drive System (August 31, 2016)
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33 Amacoil Uhing Shaft Collars Provide Non-Slip Holding of Tools (May 12, 2016)
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34 H2W Technologies Introduces XY Voice Coil Positioning Stage (March 21, 2019)
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35 Klüber Gear Oils Provide Improved Component Reliability (July 12, 2016)
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36 Kluber Lubrication Offers Fully-Synthetic Oil for Rail Gearboxes (June 21, 2018)
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37 New Oil from Heatbath Corp. (February 2, 2005)
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38 New Lubrication System from Oil Rite (March 16, 2005)
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39 Moticont Voice Coil Motor Offers High Force to Size Ratio (July 18, 2018)
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40 Philadelphia Gear Offers Two Versions of Continuous Oil Rescue Equipment (March 5, 2007)
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41 H2W Introduces Force Voice Coil Actuator for Various Applications (February 2, 2018)
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42 PowerJacks Offer More Precise Movement with Spring Coil Limiter (January 8, 2007)
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43 Twin Disc Announces Multiple Orders for Oil and Gas Transmission Systems (March 15, 2017)
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44 Oilgear Expands Variable Displacement Pump Series (May 19, 2016)
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45 Lenze Sponsors Student Project in Coil Winding Challenge (July 23, 2015)
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46 H2W Technologies Examines Coil Redundancy (April 29, 2019)
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47 Oilgear Exhibits Pump Packages at Bauma 2016 (April 13, 2016)
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48 Voith Turbo Opens New Power, Oil & Gas Division Headquarters in Houston (July 7, 2015)
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49 GE Oil and Gas to Acquire Allen Gears (December 12, 2013)
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50 Thomson Collaborates with Research Team to Develop New Tesla Coil Designs (June 13, 2017)
Thomson Industries has donated a high-precision ball screw assembly to The Geek Group National Science Institute in Grand Rapids, Michiga...

51 Gill Sensors Offers Oil Debris Sensor (March 11, 2016)
Gill Sensors and Controls Limited has announced immediate availability of its new Oil Debris Sensor that provides continuous real-time mo...

52 Graphalloy Bushings Provide Solution for Oil Field Applications (May 3, 2012)
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53 SKF Centralizes Solid Oil Bearing Production (September 9, 2016)
SKF has centralized the production of bearings with Solid Oil to promote timely delivery throughout North America and has introduced enha...

54 BEI Offers Voice Coil Actuators (June 23, 2011)
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