Torque calculation force

1. According to the torque coefficient of torque force * diameter * pretension. The formula is: k = t / (p * d)
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2. When the torque is known,
(1) the driving force can be calculated by the following formula: driving force = torque × Gear ratio of gearbox × Speed ratio of final drive × Mechanical efficiency ÷ The tire radius
(2) the calculation force can also be calculated according to: force F × Radius r = torque, calculated
2, torque: it is a kind of special torque that makes the 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 external torque is called torque or external force couple moment, and the internal torque or internal force couple moment.

3. The calculation of motor torque is as follows: T = 9550p / N; This formula is commonly used in Engineering: torque; Power; The calculation formula of the relationship among the rotating speed and the speed is given. T -- torque (unit: N.M.); 9550 - take it as a constant; P -- power of motor (unit: kW); N -- output speed (unit: RPM); Motor torque is the output torque of motor, which is one of the basic parameters of motor. The common unit is n * m (n * m). Motor torque refers to the output torque of the motor, also known as motor torque, which is related to the output power of the motor. The common unit is n * m (n * m). Other units include: Mn * m (Mn * m), kn * m (KN * m), oz * in (Oz * in), kg * cm (kg * cm), gr * cm (g * cm), LB * ft (LB * ft), LB * in (LB * in), oz * ft (Oz * ft). Development information: motor torque, in short, refers to the size of the rotational force. But the torque of the motor is directly proportional to the strength of the rotating magnetic field, the current in the rotor cage bar and the square of the power supply voltage, so the torque is determined by the factors of current and voltage. Torque is a kind of torque. The definition of torque in physics is: torque = force × Force arm. The arm of force here can be regarded as the turning radius of the object driven by the motor. If the motor torque is too small, it will not move the object, that is, it will feel that the "strength" of the motor is not big enough. Generally speaking, the strength of the motor driving the mechanical rotation is the torque of the motor, the torque of the motor = the force of the pulley driving the belt x the radius of the pulley. Torque motor is a kind of special motor with soft mechanical characteristics and wide speed range. The shaft of this kind of motor does not output power by constant power, but by constant torque. Torque motor includes: DC torque motor, AC torque motor, and brushless DC torque motor. Motor torque network

4.

Formula

driving force = torque × Gear ratio of gearbox × Final gear ratio × Mechanical efficiency ÷ Tire radius (unit: m)

summary: 1kgm = 9.8nm1lb ft = 0.13826kgm1lb ft = 1.355nm

in the case of a certain displacement, the cylinder with small cylinder diameter and long stroke pays more attention to the exertion of torque, and the rotation speed is not too high, so it is suitable for vehicles requiring large load. The cylinder with large diameter and short stroke pays more attention to the output of power, and the speed is usually higher, which is suitable for fast running vehicles. In short: power is proportional to torque × Rotate speed

calculation

power P = work W ÷ Time t work w = force F × So, P = F × s/t=F × Velocity V

here V is the linear velocity, and in the engine, the linear velocity of the crankshaft = the angular velocity of the crankshaft ω× The radius of crankshaft R is substituted into the above formula to get: power P = force F × Radius r × angular velocity ω And force F × Radius r = torque

it is concluded that power P = torque × angular velocity ω So the power of the engine can be calculated from the torque and speed

the unit of angular velocity is radian / s, which is one in radian system π It represents 180 degree

extended data

the pinion drives the big gear, assuming that the number of teeth of the pinion is 15 and the number of teeth of the big gear is 45

when the pinion rotates at 3000rpm and the torque is 20kgm, the speed transmitted to the big gear decreases by 1 / 3 to 1000rpm; However, the torque is tripled to 60 KGM. This is the basic principle that engine torque can be reced and amplified through the transmission

in automobile, the output of engine to tire is amplified twice, the first is generated by the gear of gearbox, and the second is caused by the final gear ratio (or final transmission ratio)

The total magnification of

torque is the multiplication of the gearbox gear ratio and the final gear ratio. For example, the first gear ratio of hand-held six generation Ximei is 3.250, the final gear ratio is 4.058, and the maximum torque of the engine is 14.6kgm/5500rpm, so we can calculate that the maximum torque of the first gear is 14.6 after amplification × three point two five zero × 058 = 192.55kgm, 13 times larger than the original engine

in this case, the thrust of 470kg can be obtained by dividing the tire radius by about 0.41m. However, the above value is not the actual thrust, after all, there must be wear loss in the process of mechanical transmission, so the factor of mechanical efficiency must be taken into account

When it comes to mechanical efficiency, every gear transmission will proce a loss of power. The mechanical efficiency of manual transmission is about 95%, that of automatic transmission is about 88%, and that of universal joint of transmission shaft is about 98%. You can see how much thrust is left. Overall, the driving force of the vehicle can be calculated by the following formula:

driving force = torque × Gear ratio of gearbox × Final gear ratio × Mechanical efficiency / tire radius (in meters)

horsepower is not a force, but a unit of power, defined as the amount of work that can be done in a unit time. Power is calculated from torque, and the formula is quite simple: power (W) = 2 π× Torque (nm) × Speed (RPM) / 60, after simplified calculation: power (kw) = torque (nm) × Speed (RPM) / 9549, please refer to the block article for detailed derivation. However, how to convert kW power into common horsepower

5. T = 9549 (n / N)
t: shaft torque
n: shaft power (or motor power)
n: shaft speed

6. There is a common formula for motors:
P = m * n / 9550
1. P is power, M is motor torque (also known as torque), and N is motor speed. When m and N are both rated values, motor power is also rated power, and rating refers to the limit value of long-term operation of motor
2. Transient torque refers to the transition value of motor when load and speed change, It has nothing to do with the rating. Specifically, this value can exceed the rated torque. If the motor speed is rated at this time, the motor may have power overload, which can only last for a short time. This time depends on the motor design
3. Generally, the power of the inverter should be greater than or equal to the three-phase asynchronous motor, but this is not enough. The rated current and overload current of the inverter should be greater than or equal to the rated value or the maximum value required by the motor, so as to ensure that the motor can proce enough torque (rated and transient torque), otherwise, the inverter may be unable to drive the motor and load.

7. The terms you gave are not very clear, nor are they very clear

8. Under the action of static moment, the body does not proce rotational motion, it can proce shear stress inside the body
the "dynamic moment" refers to the work done by a body rotating at a certain speed under the action of the moment

the former is equivalent to the force acting on the object, and the object does not move; The latter is equivalent to the object moving at a certain speed under the action of force.

9. Torque is called torque, which is equal to the force times the arm of force. If you know the thrust, you can calculate the torque as long as you know the arm

10. Tightening torque = torque coefficient * preload * nominal diameter of thread. The key is the torque coefficient. With the same thread size, the torque coefficient of different surface treatment is different