CONCAVE - CENTER DISC DIMPLES TOWARDS THE MOTOR. Le côté qui ne sert pas de récipient est convexe. This is the simple and clear reasons behind the concave truck rear wheel while the truck front wheels are convex. Move forced heated, cooled or ambient temperature air to specific spot areas with a direct drive centrifugal fan for your blower assembly. Les courbes convexes et concaves sont utiles pour nous, humains, et sont utilisées par les fabricants pour fabriquer des produits qui nous facilitent la vie. Be the first to review “Blower Wheel 11 x 10 Convex” Cancel reply. The best way to get this information is to ask them to draw a circle within a circle. Remember: if you're also selling a new motor, you don't have to stay with the old bore size. Only severe environmental conditions or possible smoke/fire concerns could dictate one over the other. The centrifugal affects on the moving air as it travels from the center inlet(s) of the wheel cause it to be thrown out from the edge of the wheel in to the blower housing. We custom made high performance and lightweight concave wheels, aftermarket wheels for suv, off-road, racing car, sport car. Product Description. What's the pros & cons of Convex vs. Concave vs. Flat vs. Multi Bevel? The Difference Between Concave and Convex Concave wheels have lines that curve inward. concave-convex rule in kinesiology briefly illustrated by a professor of physical therapy Ask Our Pros-Owner Assistance - NO DIY advice will be given. Lip vs. Concave vs. You need to remember this, because your customers probably won't. Tue, Feb 16 × 17. But you should always verify these features of your replacement wheel whenever you notice a hub plate that is not straight (perpendicular to the blades). Then have the customer draw a letter "C" at 6 o'clock and another "C" at 12 o'clock along the edge of the large circle. 4] Shaft Bore: Obviously, this must match that of the motor. 2] Diameter and Width: Always refer to the size of a wheel by diameter first, and then width. View Return Policy. As long as the bore matches the size of your new motor you're OK. 5] Material: Most wheels are either of galvanized steel, painted steel, plastic or aluminum. Un moyen très simple de comprendre la différence entre concave et convexe est de prendre une cuillère à soupe. Wheels are made using heavy duty, corrosion resistant galvanized, cold rolled steel for long lasting durability. A concave mirror is a spherical mirror in which the reflecting surface and the center of curvature fall on the same side of the mirror. If it is a single inlet wheel, the plate will be at one edge of the wheel opening, and the air can only enter from the edge opposite the hub plate. If it is a double inlet wheel, there will be a centered (not always exactly in the center) plate containing the hub which mounts to the shaft, and the air enters from both ends of the wheel. $10.98 /each Quantity Price; 1-24: $10.98: 25-49: $10.45: 50+ $10.15 . Since fan blades (propellers) cannot develop and maintain the necessary static pressure to move equivalent amounts of air through ducts, filters and registers, centrifugal blowers are used for these applications. 3] Determine Rotation CW vs. CCW: This is often an area of mass confusion, but if you already read about how these wheels work, the following should be easy to understand: However, just because you do, doesn't mean it will be easy to explain it to your customers. On the other hand, a convex lens is thicker in the middle and thinner at the edges. If anybody specifies a "spark proof" application, you must avoid steel wheels. It's been a while since I have encountered this. You must be logged in to post a review. Now, ask the customer which "C" represents the customer's wheel. This low pressure causes air in the center of the wheel to rush towards the edge of the wheel. If it is a single inlet wheel, the plate will be at one edge of the wheel opening, and the air can only enter from the edge opposite the hub plate. Always check with your customer. Video tutorial on light reflection off concave and convex mirrors.Features slides from slidescarnival.com A double-inlet wheel's direction of rotation is viewed from the hub end (that with the set-screw lock. Gain access to our free AOP (Ask a Professional) Section to get real answers for your questions. There are several other types: forward, and backward inclined wheels, radial wheels (such as our S58-462 used on Broan [model 663, 688] bathroom fans), but here we're only going to discuss centrifugal wheels, such as those found in most residential and light commercial furnaces, air handlers and fan coil units. Because of the opposite curvature of the wood, the rest of the bevel is not touching the wood. If you can physically fit a concave wheel in place where there was a convex wheel (and visa versa), you'll probably be OK. Blower Wheels, Motor Accessories, Motors, including Single Inlet Blower Wheel For Room Air Conditioners, Power Burners, Draft Boosters, Other Heating.. Most of what is sold are standard, squirrel cage type centrifugal wheels. Concave vs. Convex: Examples. The best way to get this information is to ask them to draw a circle within a circle. Centrifugal blower wheels move air by increasing the pressure on the concave surface of each blade as the wheel rotates. Concave wheels are so popular that is hard to remember a time when they weren’t a thing. The low pressure condition created by a blade on the right side of a clockwise turning wheel will immediately be pressurized by the blade to the immediate left as the wheel continues to turn. 9.5 X 6 CW CVX. Today I found out why the motor must be changed out, the first time the blower wheel is changed out. Backward Incline Centrifugal Wheels Lau Double Inlet Blower Wheels & Direct Drive Wheels Double Inlet Blower Wheels And Direct Drive Wheels Are Universal Replacement Wheels For Direct Drive Blowers. Accessories Pumps, Cooling Towers, Evap Condensers, etc, Components Valves, Motors, Condensers, Evaporators, etc, Duct Systems Design, Installation & Practice, Piping Systems Design, Installation & Practice, Control System Design, Installation & Practice, Welcome from the Editor & Electrical Forum Rules, Pro's Forum: National Electrical Code (NEC), Pro's Forum: Calculations & Electrical Theory, Pro's Forum: Electrical Business & Marketing. Only severe environmental conditions or possible smoke/fire concerns could dictate one over the other. Move forced heated, cooled or ambient temperature air to specific spot areas with a direct drive centrifugal fan for your blower assembly. Si l’on regarde son propre reflet dedans, on paraît plus gros. 5] Material: Most wheels are either of galvanized steel, painted steel, plastic or aluminum. If it is the 6 o'clock "C", then his wheel is CCW (counter clockwise). This increase in pressure on the concave side creates low pressure on the back (convex) side of each of these blades. If it's the 12 o'clock "C", his wheel is CW (clockwise). What are Convex and Concave Functions? These high-performance products produce high air volume with low vibration for diverse air-moving applications. The snowballs were perfectly round, their convex form looking like they had been made with an ice cream scoop. Diameter First, Width Last. Components Coils, Heaters, Motors, etc. The KEY identification steps to proper blower wheel identification are as follows: 1] Single or Double Inlet Wheel? Say a 2" circle around a centered 1" circle, and the 1" circle represents the hub. Blower Wheel 11 x 10 Convex. A concave lens is thinner in the middle and thicker at the edges. One last but VERY IMPORTANT word of CAUTION: The industry standard for determining the proper rotation of a single-inlet blower wheels is while viewing the back plate, or opposite the air inlet end. There are several other types: forward, and backward inclined wheels, radial wheels (such as our S58-462 used on Broan [model 663, 688] bathroom fans), but here we're only going to discuss centrifugal wheels, such as those found in most residential and light commercial furnaces, air handlers and fan coil units. By always doing this, we will eliminate the possibility of our vendors sending us an incorrect wheel. With a wheel that narrow it is very difficult to accomplish much concave. We hope you are clear on why truck’s back wheels are concave and front wheels are convex. Please stick to F1 on this forum. Rolling Tool, Convex and Concave Rollers Product Code: 75-019. Johnstone-Philadelphia. Deep concave wheels are designed with spokes that curve, more or less gracefully, inwards toward the hub center of the wheel, such that if you put the wheel face up and flat on the ground, the cosmetic face of the wheel would form a bowl shape. We can do 60mm deep concave wheels and rims from 16" to 22", Warranty: lifetime warranty for forged wheels. Qty Arrives at 98837; 2: Tue, Feb 16 3: Wed, Feb 17 10: Thu, Feb 18 2: Thu, Feb 18 – Fri, Feb 19 Questions? One last but VERY IMPORTANT word of CAUTION: The industry standard for determining the proper rotation of a single-inlet blower wheels is while viewing the back plate, or opposite the air inlet end. Add to List. Since fan blades (propellers) cannot develop and maintain the necessary static pressure to move equivalent amounts of air through ducts, filters and registers, centrifugal blowers are used for these applications. Blower Wheel 11 x 10 Convex $ 78.53. Diameter First, Width Last. On the leading, convex side of the impeller blade, a positive pressure is created as the rotational motion of the impeller imparts a force in the air. Please disregard our earlier advice. Remember: if you're also selling a new motor, you don't have to stay with the old bore size. Convex vs. Concave Grind ? This is easy to remember because the D & F both come before W & L in the alphabet. Now, ask the customer which "C" represents the customer's wheel. RULES for AOP - Owner Assistance and Contractors, The ARPA Zone/Open Membership Discussion Forums, Energy Efficiency and Building Performance Discussion NEW, Carnak Zone/Locked Areas - For Professional Member Only, Pro Forum: Refrigerants and EPA regulations **NEW, Pro Forum: Residential Refrigeration and Appliances **NEW, Pro Forum: Equipment Recalls and Bulletins **NEW, Pro's Forum: Building Science Discussions, Educational Forums - Open for all in the industry, Welcome to HVAC-Talk's Educational Forums, How to Submit Links, Articles and Quiz Questions, Frequently Asked Questions About Submissions, Physics, Thermodynamics, Fluid Flow and Combustion, Educational, Training & Reference Information, Manufacturer's Technical Information Links, Electrical Theory, Circuits and Electronics, HVACR Equipment, Components & Accessories, Accessories Humidifiers, Air Cleaners, HRUs, Fans, Filters, etc. The low pressure condition created by a blade on the right side of a clockwise turning wheel will immediately be pressurized by the blade to the immediate left as the wheel continues to turn. The low pressure condition created by a blade on the right side of a clockwise turning wheel will immediately be pressurized by the blade … I see some references to concave self centering, so maybe they both do. Lastly, remember everything is there for a purpose. Please stick to F1 on this forum. As long as the bore matches the size of your new motor you're OK. 2] Diameter and Width: Always refer to the size of a wheel by diameter first, and then width. But you should always verify these features of your replacement wheel whenever you notice a hub plate that is not straight (perpendicular to the blades). We get a lot of calls from customers saying that they want a really concave wheel for their car, but the widest their vehicle can use is an 8.5 inch wheel. Here are our CFD links and discussions about aerodynamics, suspension, driver safety and tyres. If it's the 12 o'clock "C", his wheel is CW (clockwise). A double-inlet wheel's direction of rotation is viewed from the hub end (that with the set-screw lock. Getting others opinions on the subject will never give you the answers you are looking for. The #1 question asked by NEW MEMBERS. Then have the customer draw a letter "C" at 6 o'clock and another "C" at 12 o'clock along the edge of the large circle. Discounts starting at 25 pcs. Always check with your customer. These high-performance products produce high air volume with low vibration for diverse air-moving applications. Call 1-888-757-4774. Convex wheels have lines that curve outward. Convexité de C concave convexe C(7)=25,7. SKU: N667280 Category: Miller/Revolv. Concave vs. Convex Examples. There are very few reasons why somebody with a plastic or metal wheel should not be able to accept a substitute material. I don't know that there are any advantages of concave arrays. The centrifugal affects on the moving air as it travels from the center inlet(s) of the wheel cause it to be thrown out from the edge of the wheel in to the blower housing. On the concave side of the impeller blade, a negative pressure is created as the fan rotates, drawing air into the space between the blades. Remembering 'Concave' vs. 'Convex' So if you need to tell the difference between concave and convex simply remember that convex comes from the Latin word convexus, which may mean either “convex” or “concave” or … wait a minute. Here are our CFD links and discussions about aerodynamics, suspension, driver safety and tyres. 3) Après le point d'inflexion, la fonction est convexe, la croissance du coût de fabrication C s'accélère. The corset made her waist look tiny, giving a concave, hour-glass shape to her body. The phenomenon known as concave wheels has changed the wheel game forever and has become the newest trend in aftermarket wheels worldwide. If anybody specifies a "spark proof" application, you must avoid steel wheels. 4] Shaft Bore: Obviously, this must match that of the motor. 10-5/8" Convex DBL Inlet Blower Wheel w/ Direct Drive, CW (1/2" Bore) 01332501 10-5/8" Convex DBL Inlet Blower Wheel w/ Direct Drive, CW (1/2" Bore) SKU: 01332501. The KEY identification steps to proper blower wheel identification are as follows: The original blower wheel has been discontinued, the center of the original blower wheel is concave. 1] Single or Double Inlet Wheel? Blower Wheel 11 x 10 Convex quantity. Meaning it is dished in, towards the motor. Single Inlet Blower Wheel. Click to expand... Good luck in your quest. Tout objet présentant une courbure est convexe ou concave. 3] Determine Rotation CW vs. CCW: This is often an area of mass confusion, but if you already read about how these wheels work, the following should be easy to understand: However, just because you do, doesn't mean it will be easy to explain it to your customers. Mikael W. 1,675. This low pressure causes air in the center of the wheel to rush towards the edge of the wheel. Post photos, respond to polls and access other special features. This increase in pressure on the concave side creates low pressure on the back (convex) side of each of these blades. In introductory level math books, the term convex is often conflated with the opposite term concave by referring to a "concave function" as "convex downward". There is often quite a bit of confusion regarding the proper identification of blower wheels used in our industry. A function that has an increasing first derivative bends upwards and is known as a convex function. Concave and convex are also two types of spherical mirrors. The replacement blower wheel center is convex, meaning it is dished out, away from the motor. Whether the wheels are concave or convex; the distribution is balanced for a safe ride down the roads. Russ Fairfield >When used on the inside of the bowl the normal concave bevel that we would get from the grinding wheel will be across the surface of the wood and ride on the cutting edge and the heal (bottom) of the bevel. … Replacing the classic but outdated look of the typical lips on wheels, concave wheels gives a car the ultimate depth in looks while maintaining all the functionality of the original aftermarket style wheels. Add to List. Le côté qui sert de récipient est concave. If it is the 6 o'clock "C", then his wheel is CCW (counter clockwise). The Guardian. Blower Wheel Identification Techniques The original blower shaft is top short to reach the blower wheel… OEM / ODM WHEELS & Looking for Agent / dealer / Distributor. HOW DO THESE WHEELS MOVE AIR? Likewise, a "concave" function is referred to as "convex upwards" to distinguish it from "convex downwards". Our 20th year anniversary is May 21, 2020. Here are some examples of concave and convex used in a sentence: The table was not flat, but sloped outwards, slightly convex like the glass of a watch. Yvan Monka – Académie de Strasbourg – www.maths-et-tiques.fr 4 Ainsi, le point de coordonnées (7 ; 25,7) est un point d'inflexion de la courbe. Additionally, the concept part remains with other automobiles as well such as luxurious cars. If it is a double inlet wheel, there will be a centered (not always exactly in the center) plate containing the hub which mounts to the shaft, and the air enters from both ends of the wheel. Additional information Reviews (0) Additional information. Centrifugal blower wheels move air by increasing the pressure on the concave surface of each blade as the wheel rotates. This increase in pressure on the concave side creates low pressure on the back (convex) side of each of these blades. The dimensions, direction, and other characteristics are the same. The amount of concave depends on several factors including wheel width, wheel brake clearance, wheel offset, and just the way the wheel was engineered. This air remains pressurized (by the constant reintroduction of more air) as it makes its way out of the discharge portion of the snail-shell shaped housing. The 2" circle represents the outside edge of the wheel. Although all double-inlet wheels can be reversed, it may be quite difficult to access the set-screw to tighten the wheel onto the blower or motor shaft. - YouTube The difference between convex and concave mirror is explained hereunder: The type of spherical mirror whose reflecting surface is bulged outwards, in the sense that its face is opposite to the centre of the sphere is known as a convex mirror. The main parts of the complex are connected by spaces in which dark alternates with light, concave elements with convex and closing-in with opening-up, and the pursuit of extraordinariness is occasionally paused by something quieter. Eventually you will learn its something you will need to experience for yourself to understand. David Whitnack it faces towards the centre of the sphere is called a concave mirror. Weight: 10 lbs: Reviews There are no reviews yet. Si … If you can physically fit a concave wheel in place where there was a convex wheel (and visa versa), you'll probably be OK. CONVEX - CENTER DISC DIMPLES AWAY FROM THE MOTOR. Which Wheels Look Best? Add to cart. We are custom wheels manufacturers, specializing in 6061-T6 aluminum concave forged wheels. Yes... we are 20 years old. This is easy to remember because the D & F both come before W & L in the alphabet. A curved mirror whose reflecting surface is bent inwards, i.e. On the other hand, a convex … ROTATION IS DETERMINED BY THE WAY IT SPINS WHILE LOOKING AT THE MOUNTING HUB. Centrifugal blower wheels move air by increasing the pressure on the concave surface of each blade as the wheel rotates. There are very few reasons why somebody with a plastic or metal wheel should not be able to accept a substitute material. View Bulk Pricing Quantity: Returning Tools Unfortunately, we cannot accept returns on tools. TO MEASURE A BLOWER WHEEL: FIRST MEASURE THE DIAMETER, SECOND MEASURE THE LENGTH. Say a 2" circle around a centered 1" circle, and the 1" circle represents the hub. Oct 21, 2012 #13. Concave vs convexe. When on the car, that bowl shape curves inward towards the car's suspension, creating a very interesting and sometimes even jarringly fresh look. A convex lens is known as a converging lens, whereas a concave lens is also known as a diverging lens. The majority seem to be convex these days. This air remains pressurized (by the constant reintroduction of more air) as it makes its way out of the discharge portion of the snail-shell shaped housing. The impeller blade pushes the air outwards, exiting in a radial direction. By always doing this, we will eliminate the possibility of our vendors sending us an incorrect wheel. 6] On some small blowers and residential furnaces, the hub plate may be either concave or convex, relative to the inlet of the wheel containing the hub and locking (set) screw. Most of what is sold are standard, squirrel cage type centrifugal wheels. 2. You need to remember this, because your customers probably won't. Convex is also supposed to self align better, due to the terminators allowing side force from the solder. The second derivative of the function depicts how the function is curved, unlike the first derivative which tells us about the slope of the tangent function. I have a customer that is looking for a blower wheel and he is claiming that the wheel he has is "convex". The 2" circle represents the outside edge of the wheel. This low pressure causes air in the center of the wheel to rush towards the edge of the wheel. All of the wheels we carry are concave. There is often quite a bit of confusion regarding the proper identification of blower wheels used in our industry. By paying more on the dollars of a tire, you can actually have the concave-styled wheel. Although all double-inlet wheels can be reversed, it may be quite difficult to access the set-screw to tighten the wheel onto the blower or motor shaft. Compare. 6] On some small blowers and residential furnaces, the hub plate may be either concave or convex, relative to the inlet of the wheel containing the hub and locking (set) screw. Participate in over 40 different forums and search/browse from nearly 3 million posts. Both?! Brand: Lau-+ $64.34 each ADD TO CART. Double Inlet Blower Wheels .
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