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Torque requirement for a sand mixer / motor selection Torque requirement for a sand mixer / motor selection caprock (Mechanical) (OP) 14 Jul 16 22:28. Hi everyone, I am in the process of designing a sand mixer and could use some help with calculating the motor torque requirements. Some details: It is silica sand in a small mixing vessel that is inclined at 60 degrees from horizontal. The ...

Get PriceSeveral points along the curve are used for evaluation. The loading point, L, shows when the mixer is completely filled and closed. This point is used as a time base for calculation only. The stable torque point, S, is when the torque reaches a stable value, usually taken at 10% above the minimum point. The minimum point, M, occurs when the ...

Get PriceOne commonly used method of plotting motor characteristics graphically is the use of torque-speed curves. While the use of torque-speed curves is much more common in technical literature for larger DC machines than it is for small, ironless core devices, the technique is applicable in either case.

Get PriceFrom the torque-armature current curve it is evident that so long as the field of the motor is not saturated, the series motor exerts a torque proportional to the square of current i.e., starting torque is very high. Hence series motors are used where large starting torque is required for accelerating heavy masses quickly such as in hoists, electric railways, trolleys and electric vehicles ...

Get PriceSpeed-torque curves of dc motors for these methods of speed control are shown in Figs. 5.16 to 5.18. Armature voltage control is preferred because of high efficiency, good transient response and good speed regulation. But it can provide Speed Control of DC Motor Drives only below base (rated) speed because the armature voltage cannot be allowed to exceed rated value. For speed control above ...

Get PriceFigure 3 Constant Torque Speed-Torque Relationship Figure 4 Constant HP Speed-Torque Relationships HP = TS = TS 5250 5250 ARL 17 Power Transmission Engineering 49. the torque requirements of a drill press (Fig. 4). When a large hole is being drilled, the drill is operated at a low speed; but it requires a very high torque to turn the large drill in the material. When a small hole is .

Get PricePower ~ Torque * Speed Impeller power consumption can be calculated as a product of the direct torque, rotational impeller speed, and a coefficient (usually equal to 2 times a unit conversion factor, if required). The power consumption of the mixer motor differs from that of the impeller by the variable amount of power draw imposed by various sources (mixer condition, transmission, gears ...

Get PriceSpeed-torque curves of dc motors for these methods of speed control are shown in Figs. 5.16 to 5.18. Armature voltage control is preferred because of high efficiency, good transient response and good speed regulation. But it can provide Speed Control of DC Motor Drives only below base (rated) speed because the armature voltage cannot be allowed to exceed rated value. For speed control above ...

Get PriceTorque and Blade Loading on a Mixer Shaft and Blade. in the design of the individual mixer components. In addition to designing for the loads in the shaft, these loads are transmitted through the gearbox, mounting structure, and finally the tank. The interaction of the process and the mechanical loads is extremely strong. Even in a mild case, the ± 40 percent load fluctuations stemming from ...

Get PriceThe Thevenin torque equation was used above to plot the torque-speed curve of an induction machine. Since the torque is given only as a function of slip, it is possible to use that equation to find the slip at which torque is a maximum. However, a mathematically simpler and intuitively clearer answer can be found be considering the power flow in the Thevenin equivalent of Fig. 2. Analysing the ...

Get PriceAs mixer speed increases, flow increases proportionately. Newtonian liquids include water, mineral oils, ... mixer motor with regard to torque (in-oz) and to the rotation speed (in revolutions per minute—rpm) as defined by the following equation: hp = (in-oz x rpm)/1,008,400 Figure 1: Aiming the shaft off center avoids vortexing and allows strong top-to-bottom turnover. This is the best ...

Get PriceTorque/Speed Characteristic Under Load As stated earlier, stable operation of an induction motor lies over the linear portion of its torque/ speed curve. The slope of this straight line depends mainly on the rotor resistance. Higher the resistance, sharper the slope. This linear relationship between torque and speed (Fig. 34.26) enables us to establish a very simple equation between different ...

Get Priceslowly up to 60 min. Mixing at higher speeds produced higher torque readings, as would be expected, but in addition the shape of the curves progressively changed. At 120 rpm the curve was very flat between 'arrival' at the 1.0 kgf m line after 1 min and 'departure' after 4 min. On increasing speed to 180 rpm the previous

Get PricePower ~ Torque * Speed Impeller power consumption can be calculated as a product of the direct torque, rotational impeller speed, and a coefficient (usually equal to 2 times a unit conversion factor, if required). The power consumption of the mixer motor differs from that of the impeller by the variable amount of power draw imposed by various sources (mixer condition, transmission, gears ...

Get PricePower ~ Torque * Speed Impeller power consumption can be calculated as a product of the direct torque, rotational impeller speed, and a coefficient (usually equal to 2 times a unit conversion factor, if required). The power consumption of the mixer motor differs from that of the impeller by the variable amount of power draw imposed by various sources (mixer condition, transmission, gears ...

Get PriceHP= (Torque x RPM)/5250. You can measure torque and RPM and you have to calculate the Horsepower (HP) from them and not vice versa. A typical engine performance curve is shown below: Fig.1: Engine Performance Torque Curve. Torque curve (shown in Dark red color) is the graph plotted between torque and RPM of the engine. Normally it also plotted ...

Get PriceWhere N is the rotor speed of the mixer, m is the polymer melt consistency, n the power law index, g=N2/N1 (gear ratio between the second rotor speed – N 2, and the first rotor speed – N 1), L is the length of the cylinders (rotors) and G is the torque. Bousmina(5) found R i assuming either Newtonian or power law behavior and no empirical correlation was used, unlike the work of Goodrich e ...

Get PriceThis measuring mixer and extruder system supports you in process modelling activities such as: Compounding polymers with additives to reduce flammability, viscosity, etc., scale-up extrusion processes by using different L/D ratios to extrapolate to your master process line, simulating master processes using only as little as 50g of material to optimize extrusion or mixing in respect to ...

Get PriceThe measuring mixers consist of a mixer backstand with gear unit and a mixer bowl. An electronic safety system prevents the drive unit from damage due to overload. The blades are made of special steel. Counter-rotation towards each other at different speeds provides excellent compounding and mixing characteristics. Heating/cooling is done ...

Get PriceRotomaxx™ Low-Speed Mixer. General Information; How it Works; Specifications; Options; Datasheet; The Rotomaxx is a low-speed right angle mixer designed to meet your requirements for high flow rate and high torque, capable of processing up to 10,000 gallons at viscosities up to 10,000 CPS for large volume mix and holding tanks.Rotomaxx features a 304SS gearbox, bearing frame and motor.

Get Price02.06.2019· 2. Quadratic torque. Quadratic torque is the most common load type. Typical applications are centrifugal pumps and fans. The torque is quadratically, and the power is cubically proportional to the speed. Figure 2 – Typical torque and power curves in a quadratic torque application. Go back to Types ↑ 3. Constant power

Get Price03.08.2019· You should start by plotting torque against RPM. Then compute the power from that and plot it on the same graph. With the data you now have you can only plot one torque point = 492.8Nm at 6500 RPM. To guess more points you must look at other plots for similar motors to see how the shape of the torque to RPM curve changes.

Get PriceThe Thevenin torque equation was used above to plot the torque-speed curve of an induction machine. Since the torque is given only as a function of slip, it is possible to use that equation to find the slip at which torque is a maximum. However, a mathematically simpler and intuitively clearer answer can be found be considering the power flow in the Thevenin equivalent of Fig. 2. Analysing the ...

Get PriceThe Thevenin torque equation was used above to plot the torque-speed curve of an induction machine. Since the torque is given only as a function of slip, it is possible to use that equation to find the slip at which torque is a maximum. However, a mathematically simpler and intuitively clearer answer can be found be considering the power flow in the Thevenin equivalent of Fig. 2. Analysing the ...

Get PriceHowever, torque-speed curves generally can be approximated by a linear function, as can torque and current. Power for a motor is defined as torque multiplied by angular velocity. We can see that the maximum power from a motor occurs at the point on the curve (here a line), where the area of a rectangle drawn to a point on the line from both axes is greatest.

Get Priceand milled by one or two rotating blades at a ﬁxed rotor speed, while the torque is recorded as a function of time. The typical curve of the torque as a function of time is shown in Fig. 2. The ...

Get PriceSpeed is the rate at which the engine spins ( thats why the unit RPM - rotations per minute ) Torque is how much twisting force the engine generates at its shaft for a particular speed of rotation ( Torque = Force x Perpendicular distance - Unit...

Get Price03.06.2009· As others said, the torque curve is relatively flat over a relatively wide range of rpm. It is only when it gets really low that it starts to drop. And as you note, the curves are drawn at full throttle, so that means the fuel and air intake per stroke isn't very rpm dependent - you don't use less fuel per stroke at low rpm than at high rpm.

Get PriceThe full load engine torque curve T e [Nm] is characterized by four points: T 0 – engine torque at minimum engine speed T max – maximum engine torque (peak torque or rated torque) T P – engine torque at maximum engine power T M – engine torque at maximum engine speed. Depending on the type of intake air (atmospheric or turbocharged) the peak torque can be either a point or a line. For ...

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