Articles About heat
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Heat generation in bearings is manifested by the power losses of the transmission. Because of the rise in temperature due to heat generation, the appearance of dilatation adversely affects the bearings' geometrical characteristics.
"For your safety, please keep your hands, arms and legs inside the vehicle at all times."
When talking about high-end machining or manufacturing applications that include direct-drive technology, one of the key advantages of utilizing this particular transmission method is its endurance. Because of the very nature of direct-drive motors they are able to operate at peak performance levels indefinitely â” without any kind of wear or aging â” as long as the motor isnâ™t pushed past its capacity. Unfortunately, because this isnâ™t a perfect world, unexpected things can happen which can cause the motor to overheat. Whether the heat source is due to a parameter being input incorrectly, or an unexpected external force causing more resistance than expected â” it is important to have certain forms of thermal protection in place. Since torque motors are built in such a way that they cannot be repaired and yet maintain their efficiency, it is vital to prevent any overheating â” thus precluding the need to purchase a new one.
Many industrial facilities with air-cooled heat exchangers (ACHE) and cooling towers often have older units installed. Depending on the age, repairs, and maintenance done over the years it may have had an impact on performance. Upon conducting site inspections of the equipment, it is sometimes found that ACHE or cooling tower components have degraded. This can result in a system that is not very energy-efficient and delivers substandard cooling performance.
The Royal Danish Theatre has occupied the heart of Copenhagen for centuries and recently upgraded to a new control system featuring Sprint Electric DC drives to extend the lives of the existing motors, keeping replacement costs down. The Swedish stage design and technology company Visual Act retained most of the original motors and mechanics while providing a much-needed facelift to the stage.
In this paper, Edward Hage, founder of specAmotor.com, an online motor calculation and selection tool, focuses on the overheating of electric motors. Presented here is a calculation method with which the temperature and heat development of a direct current (DC) motor and a brushless motor can be predicted accurately.
The medical device industry today has numerous standards and regulations to follow, most notable amongst them being ISO 9001 and ISO 13485. However, these requirements have a shared blind spot: critical processes (heat treating, sterilization, etc.). In the medical industry, all of the standards and audits suppliers need to adhere to focus on general system quality. If the critical processes arenâ™t being looked at equipment can still fail because of poor craftsmanship.
Wind is a form of solar energy. Winds are caused by the uneven heating of the atmosphere by the sun, the irregularities of the earthâ™s surface, and rotation of the earth. Wind Turbines convert the kinetic energy in wind into mechanical power.
Airships, gears, robots, steam power and buzzer-beating theatrics highlight the 2017 FIRST (For Inspiration and Recognition of Science and Technology) Robotics Competition known as FIRST Steamworks.
Navigating Clutch/Brake Operation in Harsh Environmental Conditions: Chemicals, saltwater, food particles, heat, dust, and electrical corrosion are just a few of the many issues that can cause clutches and brakes to fail prematurely.
Without the sun, there would be no Earth and no life. However, our knowledge about our home star is still very limited. This is about to change. In 2018, the European Space Agency (ESA) will send its Solar Orbiter into space, equipped with a thick heat shield.
A Chicago-area bakery was replacing the tray support bearings in its ovens on a reactionary basis. Their weekly inspection cycle was resulting in two mechanics spending an average of 20 labor hours per week to replace failed bearings. The premature bearing failures were caused by a combination of the high heat and humidity in the ovens, resulting in lubrication failure and contamination. When BDI was asked to recommend a solution, the bakery was averaging one month of bearing life in this application.
New things are invented for theater lighting all the time and theyâ™re usually big, expensive technology-driven devices. Itâ™s the simple things that make you wonder, âœWhy didnâ™t I think of that?â according to Ken Billington, lighting designer. The RSC Lightlock is a great example of this.
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 demand for stepping motors with high efficiency and low losses has been increasing, although the demand had been previously focused on high torque. Also, the selection of the most suitable grade of lamination for improvement in fastening of the laminated cores has reduced losses significantly at their peak, when compared to conventional stepping motors. Lowering the losses of the motor has enabled continuous operation that was previously impossible. An expansion of the stepping motorâ™s usage into applications where another motor has been used for continuous operation and other usesâ”due to the heat generation problemâ”can now be pursued. In addition, these motors are very effective for energy saving. This paper explains the technology used for lowering the iron losses of the stepping motor.
The development of a new, gas-carburized gear steel, necessitated by a customer-driven specification, has not only increased the power density in an existing gearbox design, but has done so without requiring any significant change to production processes or heat treatment equipment.
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.
When comparing bearing suppliers, engineers are often left with few options other than to compare dynamic load ratings and corresponding life calculations. Of course, we can look at steel and manufacturing quality; but if we are comparing sources of similar quality, those items may not provide a large contrast. It often surprises people to learn that bearing capacities are calculated values, not tested values. Lately, however, a trend is emerging for bearing suppliers to increase their ratings for higher performance bearings that have premium features such as higher quality steel and specilaized heat treatment. Bearing companies are under intense competitive pressure to make every feature add to the dynamic capacity of their bearings because it is very well understood that an increase in capacity adds to the bottom line.
During the past 10 years, the PM industry has put a lot of focus on how to make powder metal gears for automotive transmissions a reality. To reach this goal, several hurdles had to be overcome, such as fatigue data generation on gears, verification of calculation methods, production technology, materials development, heat treatment recipes, design development, and cost studies. All of these advancements will be discussed, and a number of vehicles with powder metal gears in their transmissions will be presented. How the transmissions have been redesigned in order to achieve the required stress levels while minimizing weight and inertia, thus increasing efficiency, will also be discussed.
In recent years the estimation of gearbox power loss is attracting more interest â” especially in the wind turbine and automotive gearbox industry â” but also in industrial gearboxes where heat dissipation is a consideration as well. As new transmissions concepts are being researched to meet both ecological and commercial demands, a quick and reliable estimation of overall efficiency becomes inevitable in designing the optimal gearbox.
in the performance and life of a rolling element bearing. Less than 10 percent of bearings reach their theoretical L10 life, and poor lubrication can be attributed to 80 percent of those that fall short. Ideally, a lubricant forms a film layer between moving components in a bearing, separating moving parts, minimizing friction and preventing wear between balls or rollers, raceways and retainers. Lubricants also protect metal surfaces from corrosion and moisture, dissipate heat and can even prevent the ingress of contaminants.
News Items About heat
1 SKF Develops Online Heater Selection Tool for Bearings (June 14, 2016)
The new SKF online heater selection tool introduces an easy, convenient and highly accessible resource to make the right pick among heate...
2 QBC Releases Induction Heater (July 16, 2012)
A new portable Betex 22 ELD induction heater from Quality Bearings and Components (QBC) designed for heating bearings, pulleys...
3 Applied Motion Products Solves Heat Problems with Integrated Closed-Loop Step Motors (February 21, 2020)
Applied Motion Products solved heat problems associated with a peristaltic pump system that supplies materials to a bioreactor by repla...
4 Timken Invests $5 Million in Induction Heat Treat Line (April 20, 2006)
The Timken Co. announced plans to invest $5 million in a new induction heat treat line at its steel plant in Canton, OH, that will increa...
5 Maxon Motor and Gearhead Boast High Speed and Low Heat (August 1, 2014)
The new brushless drive with a diameter of 19 mm has been specially designed for high speeds and features low heat development and extrem...
6 New Basketless Heat Treatment System from Can-Eng (February 17, 2005)
The patent-pending basketless heat treatment systems from Can-Eng are designed for manufacturers of aluminum products requiring process h...
7 New Vertical Processing Machine from Inductoheat (February 11, 2005)
The modular Inductoscan vertical processing machine from Inductoheat is designed to ofer customers greater flexibility and higher uptime....
8 SKF Induction Heater Makes Hot-Mounting Bearings Faster and Safer (December 17, 2019)
The TWIM 15 induction heater has been designed to simplify the hot-mounting process. Alberto Herrera, product development manager at SK...
9 New Oil from Heatbath Corp. (February 2, 2005)
Lab Oil 100 from Heatbath Corp. is dry-to-the-touch over phosphate coating, low in toxicity, has improved emulsification and high corrosi...
10 Heatbath Acquires Chemtech Finishing (February 17, 2005)
Heatbath Corp.of Springfield, MA, has acquired the assets of Chemtech Finishing Systems. According to a letter from Chemtech's pres...
11 Alfe Heat Treating Hires General Manager (March 2, 2005)
Alfe Heat Treat Corp. hired Jerry Brasiola as general manager of their Defiance, OH, division. Most recently, Brasiola was plant manag...
12 Advanced Heat Treat Installing $1.5 Million Large Capacity Ion Nitriding Vessel (January 4, 2007)
Advanced Heat Treat Corp. is installing one of the world's largest ion nitriding vessels in their new Cullman, AL service center, cur...
13 QBC Introduces BETEX Cone Heater for Bearings (December 21, 2017)
Quality Bearings & Components, a distributor of the world’s leading bearing manufacturers and bearing maintenance equipment int...
14 McInnes Rolled Rings Completes Heat Treat Expansion (March 2, 2016)
McInnes Rolled Rings has completed an $8 million, 25,000-square-foot expansion to its current manufacturing facility. The addition expand...
15 KISSsoft Offers Enhanced Heating Calculation for Gearboxes (September 3, 2015)
The efficiency calculation and thermal analysis according to ISO/TR 14179 (module KS2) has been extended with several useful functionalit...
16 VBN Components Vibenite 290 Launched as Wear and Heat-Resistant Steel (December 28, 2017)
VBN Components is launching the world's hardest near-net-shape steel, Vibenite 290. The hardness of the alloy, plus its high carbide ...
17 Alfe Heat Treat Hires New Rep (April 14, 2006)
D. Ray Garrett joined Alfe Corporate Group as a sales rep for teh Wabash Division in Wabash, IN. According to the companys press...