Articles About seals
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Equipment downtime and reduced component life are a few of the consequences â” and potential costs â” of using the wrong seals on many types of industrial equipment including pump bearing frames, electric motors, fans, pillow blocks, gearboxes and more. However, if correctly specified and installed, seals provide effective barriers that both retain lubricants as well as protect against water, corrosion, debris and other contaminants.
The improvement of the energy efficiency of industrial gear motors and gearboxes is a common problem for many gear unit manufacturers and end-users. As is typical of other mechanical components, the radial lip seals used in such units generate friction and heat, thus contributing to energy losses of mechanical systems. There exist today simulation tools that are already helping improve the efficiency of mechanical systems â” but accurate models for seal frictional losses need to be developed. In this paper SKF presents an engineering model for radial lip seal friction based on a physical approach.
The following news items offer the latest on lubrication and seal technology in the power transmission market. From bearing greases to high-performance seals, these products will help extend the service life and manufacturing capabilities for a wide range of industrial sectors.
Seal design engineers and end users are continually seeking improved sealing systems and materials. This paper describes the potential of a new thermoplastic polyurethane (TPU) material to deliver improvements in pressure, speed and temperature capability, which are presented as comparisons to proven industry standard materials. Performance is demonstrated by virtue of test bench results of seals made from MDI-, PPDI- and NDI-based materials.
conveying system on the varnishing line for a manufacturer of high-end kitchen cabinets were leaking. Oil was dripping on the cabinet parts â” ruining the finish. Why were half of the gearboxes leaking?
SKF Product Investigation Center Troubleshoots Critical Rotating Equipment Applications with Analysis, Research and Testing Procedures.
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.
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.
Latest Sealing Technologies Offer Optimum Wear and Frictional Characteristics.
U.S. manufacturers, such as food processors, face an unprecedented competitive environment and must look for ways to be profitable without negatively affecting the quality of finished products.
Th e primary sources of bearing failure are lack of lubrication and contaminant ingress. Industrial sealing devices are the primary protection against bearing failure. When the sealing device fails, bearing failure is imminent. Th erefore, extending the life of sealing devices extends bearing life and in turn improves equipment uptime.
For either brand-new motors or those already in service, "best practices" means that informed technicians can make use of the latest diagnostic techniques (vibration analysis, thermography, shaft-voltage testing, etc.) to prevent electrical bearing damage -- either at the very beginning or very quickly thereafter. If done correctly, the work need only be done once.
Iâ™m building a custom gearbox with 7075 T-6 spur gears, and Iâ™m concerned that aluminum flakes will enter the races on the roller bearings (SKF 2307) and cause premature failure. So my question is â” should I place an oil seal on the shaft first to protect the bearing â” 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? Iâ™m confused and could use your expertise, please.
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.
How advanced ceramics are being used for instrumentation and control systems, seals and thermocouples, aero engine component repair and ion propulsion.
In most applications, gearbox reliability is critical to the productivity of the overall plant operation. So it follows that when industry is looking at the best ways to increase efficiency, reduce downtime, and increase profitability, gearbox performance and reliability are key factors. Designing for repair, and writing effective repair procedures, can speed the service time, and provide a quality refurbishment. The best practices listed in this article are proven, effective methods used to install and remove bearings, seals, gears, couplings and shafts within a gearbox.
News Items About seals
1 Trelleborg Sealing Solutions Opens Online Shop for Mechanical Face Seals (October 1, 2009)
Trelleborg Sealing Solutions has opened an E-Shop for ordering mechanical face seals. The Spare Parts E-Shop is open 24/7 at www.face-s...
2 SKF Introduces Advanced Radial Shaft Seals (May 22, 2013)
A new advanced version of SKF Speedi-Sleeve radial shaft seals is a suitable solution to restore malfunctioning sealing systems without r...
3 SKF Offers Customized Machined Seals (November 5, 2013)
SKF offers the capability to manufacture customized machined seals practically “on demand” to meet exact specifications requi...
4 Metallized Carbon Corp. Offers Carbon-Graphite Materials for Aircraft Shaft Seals (July 29, 2016)
Metallized Carbon Corporation offers a variety of materials for mechanical seals in aircraft shaft applications, including main shaf...
5 SKF Introduces HSS Radial-Shaft Seals (December 13, 2013)
SKF introduces HSS radial-shaft seals designed to promote optimized performance and reliability for critical steel mill and metals indust...
6 SKF Seals Offer Heavy-Duty Solutions (September 11, 2013)
SKF sealing solutions for industrial rotating equipment offer suitable solutions to retain lubricant and block harsh contaminants from ad...
7 MMI Offers Stainless and Inconel Ring Seals (December 22, 2016)
Michigan Manufacturing International (MMI) announced that it recently added new stainless steel and Inconel seal ring production to ...