How to calculate torsion force

1.

The moment of force is the physical quantity of the rotation of an object. It can be divided into moment of force to axis and moment of force to point. That is: M = lxf. Where l is the distance vector from the axis of rotation to the point of force and F is the vector force; The moment is also a vector

the moment of a force on an axis is the physical quantity that the force acts on an object to rotate about an axis, and its magnitude is equal to the proct of the component of the force on the plane perpendicular to the axis and the vertical distance from the line of action of the component to the axis. The moment of a force to a point is the physical quantity of the rotation action of a force to an object around a certain point, which is equal to the vector proct of the position vector of the force acting point and the force vector

extended data:

Properties of moment:

1. The moment of force F to point O is not only determined by the force, but also related to the position of moment center. The moment varies with the position of the moment center

When the force is zero or the arm of force is zero, the moment is zero

When the force moves along its action line, because the magnitude, direction and arm of the force do not change, the moment does not change

The algebraic sum of the moments of two mutually balanced forces at the same point is equal to zero

when an object is in static equilibrium, the static force is zero and the net moment to any point is zero. Moment is the derivative of angular momentum with time, just as force is the derivative of momentum with time. The angular momentum of a rigid body is the moment of inertia times the angular velocity

2. All of them are the same. The torque wrench measures the torque through the form variable of the wrench. There is no influence on the form variable of the torque wrench after adding the force arm

3.

There are three formulas for calculating the torque of rotating object:

1, M = n/ ω Torque equals power divided by angular velocity)

2, M = J α Torque is equal to moment of inertia multiplied by angular acceleration)

3, M = FL (torque is equal to force multiplied by force distance)

the rated torque of motor represents the output torque of motor shaft end under rated conditions. Torque is equal to the proct of force and arm or couple arm. In the international system of units (SI), the unit of measurement of torque is Newton; M (n ᦇ 12539; m)

the kilogram force has also been used in engineering technology; Meter and so on are used as the measurement unit of torque. The output torque of the motor shaft end is equal to the mechanical power of the rotor divided by the mechanical angular velocity of the rotor. The calculation formula of locked rotor torque of DC motor is TK = 9.55keik

< H2 > extended data

torque formula of three-phase asynchronous motor:

Sr2

m = cu12 formula

R22 + (s X20) 2

C: constant, related to the characteristics of the motor itself; U1: input voltage

R2: rotor resistance; X20: rotor leakage inctance; S: The torque of M ∝ U12 is directly proportional to the square of the power supply voltage. When the normal input voltage is set, the load torque is m2, and the voltage drop makes the electromagnetic torque M drop a lot; Since M2 is constant, the balance relationship between M and M2 is destroyed, which leads to the decrease of motor speed and the rise of slip s

In other words, the stator current I1 increases accordingly (as can be known from the transformer relationship); At the same time, the increase of I2 is also the torque M on the motor shaft rises again until it is equal to m2. At this time, the motor speed tends to a new stable value

4. Torsion, the force exerted when the material is subjected to torsional deformation, unit: n · M
the force can be measured with a dynamometer (spring scale). The working principle of spring dynamometer is elastic force. Elastic force is the force proced by the elastic deformation of an object. In the international system of units, the unit of force is Newton, abbreviated as cow, the symbol is n, 1n = 9.8kg
the two can be converted through the meaning formula.

5.

120kgf.cm＝1.2kgf.m

1kgf.cm=9.8N ×( 01M) = 0.098 (nm)

where: 1kgf = 9.8N

1cm = 0.01M

so: 1kgf.cm = 9.8N × 0.01M = 0.098 (N.m)

If: 1kgf ≈ 10N

then: 1 kgf.cm ≈ 0.1 N.m

or: 1 N.m ≈ 10 kgf.cm

extended data:

basic concept

torque, the force distance applied when the material proces torsional deformation, unit n. When measuring the mechanical parameters such as torsional stiffness or torsional molus of materials, and when measuring the dynamic mechanical properties of materials by torsion, torsion should be applied to the samples. Especially in many measuring instruments of dynamic mechanics, it is widely used because it is easier to realize the form of torque application of free oscillation or forced oscillation. For example, torsion penlum analyzer, torsion braid analyzer, rotary rheometer, etc. are applied to the sample

the so-called "torque" is the torque proced when an object is subjected to a tangential force in the direction of rotation of the object, which is usually measured by a torque wrench, and the unit is Newton · meter. Common objects affected by torque are screw nut pair, transmission shaft and so on

the so-called "torque" should be called "torque" and "rotational torque" in physics, because the result of misrepresentation is known as "torque", which has been handed down since then to guide the audience. Torsion is defined as "the force in the vertical direction multiplied by the distance from the center of rotation". The metric unit is Newton meter (n)

6.

There is no direct conversion relationship between them.

"torque" refers to the torque generated when an object is subjected to a tangential force in the direction of rotation. It is usually measured by a torque wrench, and the unit is Newton · meter“ "Kilogram" generally refers to kilogram, which is the unit of weight. Therefore, there is no direct conversion relationship between them

extended data:

1. Measurement of torsion force:

when measuring mechanical parameters such as torsional stiffness or torsional molus of materials, and when measuring dynamic mechanical properties of materials by torsion, torsion force should be applied to the samples. Especially in many measuring instruments of dynamic mechanics, it is widely used because it is easier to realize the form of torque application of free oscillation or forced oscillation. For example, torsion penlum analyzer, torsion braid analyzer, rotary rheometer, etc. are applied to the sample

2. The nature of the kilogram:

the kilogram is the unit of mass, and the mass is equivalent to how heavy a thing is. However, mass is actually a property with "inertia"; That is to say, a thing tends to maintain the existing speed without external force

when an object with a mass of one kilogram is acted by a force of one Newton, it will obtain an acceleration of one meter per second (about one tenth of the acceleration of the earth's gravity)

the weight of matter depends entirely on the local gravitational strength, while the mass does not change (assuming that the mass does not move relative to the observer at relativistic speed). Correspondingly, the astronauts in the microgravity can lift the objects in the capsule without any force; Because objects "have no weight."

however, the object still retains its mass under micro gravity, and astronauts need to exert ten times the force to accelerate the object with ten times the mass at the same acceleration

7.

Right, regardless of friction, the torque can be infinitesimal. After an infinitesimal torque is applied, the roll begins to accelerate with a fixed value, but the angular acceleration is very small, and finally it can accelerate to an infinitesimal speed after an infinitesimal time. Is there a lack of a time condition for this problem? If the acceleration is increased to 1R / min in limited time, the minimum torque solution can be obtained

When 1R / min is mentioned in

1s, the minimum torque is calculated as follows:

8. Torque is the force that makes an object rotate. Engine torque refers to the engine torque output from the crankshaft end. When the power is fixed, it is inversely proportional to the engine speed. The faster the speed is, the smaller the torque is, and vice versa. It reflects the load capacity of the vehicle in a certain range
the torque output by the engine through the flywheel is called effective torque, expressed in te, and the unit is n · M. The effective torque is balanced with the resistance torque exerted on the engine crankshaft. The output power of the engine through the flywheel is called the efficiency, expressed by PE, and the unit is kW. It is equal to the proct of effective torque and crankshaft angular velocity
the effective power of engine can be measured by bench test, that is, the effective torque and crankshaft angular velocity can be measured by dynamometer, and then the effective power of starting motor can be calculated by using the following formula
PE = te · (2 Π· n / 60) / 1000 = te · n / 9550 (kw)
where te -- effective torque, n · Mn -- engine speed, R / min
the maximum value of effective torque is called maximum torque, and the maximum value of effective power is called maximum power. Thank you for your adoption

9.

Torque in physics should be called torque and rotational torque. It is the torque proced when an object is subjected to a tangential force in the direction of rotation. It is usually measured with a torque wrench. The metric unit is Newton meter (n · m), which can be converted into the familiar kilogram meter (kg · m). 1kgm = 9.8nm, and 1kg is equal to 4.9 torque

KGF means kilogram force (kilogram force), that is, the force of 1kg object under the action of gravity

KGF is often referred to as Mg (mass times acceleration of gravity), and F is the abbreviation of force

1kgf = 9.8067n ≈ 10N

1kgf. M = 9.8067n · m

1000 torque = 1000 KGF

10. Torsion meter is widely used in aerospace, automobile manufacturing, electronic instry, medical instry, scientific research institutions, to measure the torsion of proct connectors
torsion meters are mainly divided into dynamic torsion meters and static torsion meters
the dynamic torque meter is generally a special dynamic torque sensor, which is directly connected with the motor or fan and other high-speed rotating equipment for measurement
the static torque meter is generally measured manually to compare the deformation of the measured object, the torque of the screw and so on.