The exciting force is calculated according to the mass of eccent
Publish: 2021-05-18 20:35:55
1. Exciting force: FM = g / g × r ×ω 2 (G: weight of eccentric block G: acceleration of gravity R: distance between center of mass of eccentric block and rotation axis ω： Motor rotation angle (frequency)
2. F=me ω&# 178; Where m is the mass, e is the distance (length unit)
KGM / s, where M / S (i.e. mm / (s squared)) is the acceleration (because the velocity unit is m / s per second, divided by time is the acceleration); It is divided into two parts, kg is the mass, mm / S & # 178; It is acceleration, so its meaning is mass multiplied by acceleration, which is obviously force (refer to the composition of F = mg, which means that force equals mass multiplied by acceleration). In addition, considering that it is mm, we need to divide 1000 when mm is replaced by meter, and then divide 1000 when n is replaced by kn, so 1kn = 1000kg * m / S & # 178= 1000*1000kg*mm/s² That is, the sixth power of 10 kg * mm / S & # 178;
KGM / s, where M / S (i.e. mm / (s squared)) is the acceleration (because the velocity unit is m / s per second, divided by time is the acceleration); It is divided into two parts, kg is the mass, mm / S & # 178; It is acceleration, so its meaning is mass multiplied by acceleration, which is obviously force (refer to the composition of F = mg, which means that force equals mass multiplied by acceleration). In addition, considering that it is mm, we need to divide 1000 when mm is replaced by meter, and then divide 1000 when n is replaced by kn, so 1kn = 1000kg * m / S & # 178= 1000*1000kg*mm/s² That is, the sixth power of 10 kg * mm / S & # 178;
3. Exciting force of vibrating motor: F = Mr ω 2 (n)
excitation frequency: ω= two π N / 60 (R / s)
mass of eccentric block: m -- calculated according to shape, kg
eccentric radius: R -- distance from center of gravity of eccentric block to center of rotation, m
position of center of gravity can be directly determined by coordinate method or CAXA electronic drawing software.
excitation frequency: ω= two π N / 60 (R / s)
mass of eccentric block: m -- calculated according to shape, kg
eccentric radius: R -- distance from center of gravity of eccentric block to center of rotation, m
position of center of gravity can be directly determined by coordinate method or CAXA electronic drawing software.
4. 激振力F=mrw^2
m=74.3g=0.0743kg
r=40.7mm=0.0407m
w=2πn/60=2*3.14*980/60=102.6rad/s
F=0.0743*0.0407*102.6*102.6=31.83N
m=74.3g=0.0743kg
r=40.7mm=0.0407m
w=2πn/60=2*3.14*980/60=102.6rad/s
F=0.0743*0.0407*102.6*102.6=31.83N
5. Eccentric block, eccentric moment, exciting force, calculation, graation, Calculation and analysis of eccentric moment and exciting force of several common eccentric blocks
calculation and analysis of eccentric moment and exciting force of several common eccentric blocks
calculation and analysis of eccentric moment and exciting force of several common eccentric blocks
calculation and analysis of eccentric moment and exciting force of several common eccentric blocks
calculation and analysis of eccentric moment and exciting force of several common eccentric blocks Calculation and analysis of eccentric moment and exciting force of eccentric block
calculation and analysis of eccentric moment and exciting force of several common eccentric blocks
calculation and analysis of eccentric moment and exciting force of several common eccentric blocks
calculation and analysis of eccentric moment and exciting force of several common eccentric blocks
calculation and analysis of eccentric moment and exciting force of several common eccentric blocks Calculation and analysis of eccentric moment and exciting force of eccentric block
6. Exciter is a device used to generate exciting force and apply it to other structures and equipment. The exciter can make the excited object obtain a certain form and size of vibration, so as to carry out vibration and strength test on the object, or calibrate vibration test instruments and sensors
working principle of vibration exciter:
inertial vibration exciter uses eccentric block rotation to generate the required excitation force. The unidirectional force inertial vibration exciter is generally composed of two shafts and a pair of gears with speed ratio of 1. When the two rotating shafts rotate in the opposite direction at the same speed, the resultant inertial force is generated by the two eccentric blocks on the shaft in the Y direction. When the exciter is fixed on the excited part, the excited part will get the required vibration. A self synchronous inertial vibration exciter is also widely used in vibrating machinery. The two shafts of the exciter are respectively driven by two inction motors with similar characteristics. Without gears, the two shafts with eccentric blocks can realize equal speed reverse rotation by using the principle of vibration synchronization, so as to obtain unidirectional excitation force
the electric vibration exciter passes the alternating current into the moving coil to make the coil vibrate under the action of electromagnetic exciting force in the given magnetic field. The constant magnetic field of electric vibration exciter is generated by the direct current into the excitation coil, and then the alternating current into the moving coil. The moving coil is driven by the periodic electromagnetic excitation force to drive the ejector rod to move back and forth. The expected vibration can be obtained by contacting the ejector with the excited part
the electromagnetic exciter inputs the periodically varying current into the electromagnet coil, which generates a periodically varying exciting force between the excited part and the electromagnet. The electromagnetic vibration exciter used in vibration machinery is usually composed of an electromagnet core and an armature with a coil, and a spring is installed between the core and the armature. When alternating current, alternating current plus direct current, or half wave rectified pulsating current is input to the coil, periodic exciting force can be generated. This kind of exciter usually fixes the armature directly on the working parts that need to be vibrated
electro hydraulic vibration exciter uses small power electric vibration exciter to drive hydraulic servo valve to control the hydraulic pressure medium in the pipeline, which generates a great excitation force on the piston in the hydraulic cylinder, so that the excited parts can obtain vibration.
working principle of vibration exciter:
inertial vibration exciter uses eccentric block rotation to generate the required excitation force. The unidirectional force inertial vibration exciter is generally composed of two shafts and a pair of gears with speed ratio of 1. When the two rotating shafts rotate in the opposite direction at the same speed, the resultant inertial force is generated by the two eccentric blocks on the shaft in the Y direction. When the exciter is fixed on the excited part, the excited part will get the required vibration. A self synchronous inertial vibration exciter is also widely used in vibrating machinery. The two shafts of the exciter are respectively driven by two inction motors with similar characteristics. Without gears, the two shafts with eccentric blocks can realize equal speed reverse rotation by using the principle of vibration synchronization, so as to obtain unidirectional excitation force
the electric vibration exciter passes the alternating current into the moving coil to make the coil vibrate under the action of electromagnetic exciting force in the given magnetic field. The constant magnetic field of electric vibration exciter is generated by the direct current into the excitation coil, and then the alternating current into the moving coil. The moving coil is driven by the periodic electromagnetic excitation force to drive the ejector rod to move back and forth. The expected vibration can be obtained by contacting the ejector with the excited part
the electromagnetic exciter inputs the periodically varying current into the electromagnet coil, which generates a periodically varying exciting force between the excited part and the electromagnet. The electromagnetic vibration exciter used in vibration machinery is usually composed of an electromagnet core and an armature with a coil, and a spring is installed between the core and the armature. When alternating current, alternating current plus direct current, or half wave rectified pulsating current is input to the coil, periodic exciting force can be generated. This kind of exciter usually fixes the armature directly on the working parts that need to be vibrated
electro hydraulic vibration exciter uses small power electric vibration exciter to drive hydraulic servo valve to control the hydraulic pressure medium in the pipeline, which generates a great excitation force on the piston in the hydraulic cylinder, so that the excited parts can obtain vibration.
7. If the vectors are not synchronized, the main moment will be weakened
8. The mass of the eccentric block is the mass of the eccentric block itself
eccentric mass reflects the centrifugal force. The greater the eccentric mass is, the greater the centrifugal capacity is.
eccentric mass reflects the centrifugal force. The greater the eccentric mass is, the greater the centrifugal capacity is.
9. When the centrifugal block is rotated to the highest point, the force of the plate rammer on the ground decreases<
when the centrifugal block moves to the lowest point, it provides the maximum force on the ground.
let the angular velocity of its uniform rotation be ω， If the radius is R and the mass is M1, then the centripetal force of the centrifugal block is F1, F1 = m1r ω^ 2.
the centripetal force is provided by the action of the rotating shaft on the centrifugal block F2 and the gravity m1g, F1 = f2-m1g.
therefore, the action of the centrifugal block on the plate rammer is F2 = F1 + m1g = m1r ω^ 2 + m1g.
at this time, the force acting on the ground (i.e. exciting force) is the resultant force F3 of F2 and the gravity m2 of the plate vibration rammer,
F3 = F2 + m2g = F1 + m1g + m2g = m1r ω^ 2+m1g+m2g
when the centrifugal block moves to the lowest point, it provides the maximum force on the ground.
let the angular velocity of its uniform rotation be ω， If the radius is R and the mass is M1, then the centripetal force of the centrifugal block is F1, F1 = m1r ω^ 2.
the centripetal force is provided by the action of the rotating shaft on the centrifugal block F2 and the gravity m1g, F1 = f2-m1g.
therefore, the action of the centrifugal block on the plate rammer is F2 = F1 + m1g = m1r ω^ 2 + m1g.
at this time, the force acting on the ground (i.e. exciting force) is the resultant force F3 of F2 and the gravity m2 of the plate vibration rammer,
F3 = F2 + m2g = F1 + m1g + m2g = m1r ω^ 2+m1g+m2g
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