What does the exciter do, and how does the exciter work?

1) Environmental test. Nowadays, many pyrotechnics need to do environmental excitation tests, and many military products and civilian products have a harsh working environment, often with large vibrations, and fatigue and fracture will occur after a long time.

This requires that product samples and sampling products are put on the vibrating table to carry out vibration tests, and the type of vibration is also different with the different working environment of the product, which generally simulates the working environment of the equipment. For example, most of the components on the *** take sine plus random vibration mode, and other vibration methods include sinusoidal, random, random plus random, etc.

For some specimens, impact tests are also performed using impact test benches.

2) Test equipment metering.

In the test equipment, there are sensors, amplifiers, acquisition systems, and analysis software.

In the test, the measurement accuracy of the test system has special regulations in the country, so the special test equipment should be obtained from the national measurement unit and placed on the shaking table for measurement, if the measurement is qualified, then it can be used as measurement equipment. (If your test customer requires your equipment to be verified by metrology, then you must go to the verification, like the research institute and company with more test items, the test instrument is specially responsible for the measurement of the measurement department every year).

The highest authority in China's metrology department: National Institute of Metrology (No. 18, North Third Ring East Road, Beijing); The First Metrology Center of the Commission of Science, Technology and Industry for National Defense (304 Aviation Institute, Taizhouwu, Haidian District).

In addition, there is a Chinese Academy of Metrology in Chengdu (it seems to be this name, and it also starts with China, but I don't know what can be measured and what ministry it belongs to, and there was an air pressure sensor that was measured there some time ago).

There are also metrology research institutes and metrology stations of ministries and commissions in various regions and provinces.

The exciter is used to generate vibrations. Generally, it is used to do some system vibration tests to see if the vibration in the operation of the machine does not reach the degree that affects its operation and life and the degree of noise influence of the machine. Of course, it is also essential in some vibration test modeling.

The working principle of the exciter: the use of mechanical vibration to make the excited object obtain a certain form and size of vibration, so as to carry out vibration and strength tests on the object body, or calibrate the vibration test instruments and sensors.

Various types of exciters produce different mechanical effects through different combination modes - whether it is shaft eccentricity or block eccentricity, all single-axis exciters drive the corresponding equipment to do approximate circular motion, and all dual-axis exciters or two single-axis exciters of the same model and specification are stacked in parallel and distributed, and run in the opposite direction to drive the corresponding equipment to do approximate linear vibration.

The working principle of the exciter: the use of mechanical vibration to make the excited object obtain a certain form and size of vibration, so as to carry out vibration and strength tests on the object, or calibrate vibration test instruments and sensors.

Various types of exciters produce different mechanical effects through different combination modes - whether it is shaft eccentricity or block eccentricity, all single-axis exciters drive the corresponding equipment to do approximate circular motion, and all dual-axis exciters or two single-axis exciters of the same model and specification are stacked in parallel and distributed, and run in the opposite direction to drive the corresponding equipment to do approximate linear vibration.

The exciter is used to generate excitation force, and can apply this excitation force to other structures and equipment devices, the exciter can make the excited object obtain a certain form and size of vibration, so as to carry out vibration and strength tests on the object, or calibrate vibration test instruments and sensors.

Inertial shakers use the rotation of an eccentric block to generate the required excitation force. Unidirectional excitation force inertial shakers generally consist of two rotating shafts and a pair of gears with a speed ratio of 1. The two shafts rotate in reverse rotation at equal velocity, and the two eccentric blocks on the shaft produce the resultant force of inertial force in the y direction.

When working, the exciter is fixed on the excited part, and the excited part obtains the required vibration. A self-synchronous inertial shaker is also widely used in vibrating machinery. The two shafts of this kind of shaker are respectively driven by two induction motors with similar characteristics, and without gears, relying on the principle of vibration synchronization to make two shafts with eccentric blocks achieve constant velocity reverse rotation, so as to obtain one-way excitation force.

Electric shaker An alternating current is passed into the moving coil, causing the coil to vibrate under the action of electromagnetic excitation in a given magnetic field. The constant magnetic field of the electric exciter is generated by direct current entering the excitation coil, and then the alternating current is passed into the moving coil, and the moving coil is driven by the electromagnetic excitation force of periodic changes to drive the ejector rod to reciprocate. By bringing the ejector rod into contact with the stimulated part, the expected vibration can be obtained.

Electromagnetic exciter The periodic current is fed into the electromagnet coil, and the excitation force of the periodic change is generated between the excited part and the electromagnet. Electromagnetic shakers used in vibrating machinery usually consist of an electromagnet core with a coil and an armature, with a spring between the core and the armature. A periodically varying excitation force is generated when alternating current, or alternating current plus direct current, or a pulsating current after half-wave rectification is fed to the coil, and the exciter is usually fixed directly to the working part that needs to vibrate.

Electro-hydraulic exciter The low-power electric exciter is used to drive the hydraulic servo valve to control the hydraulic pressure medium in the pipeline, and a large excitation force is generated on the piston in the hydraulic cylinder, so that the excited parts can vibrate.

It is to use the vibration motor or ordinary motor to drag or drive from the natural vibration source, so that the sieve body vibrates periodically along the direction of the excitation force, and the material moves parabolically along the straight direction on the screen surface, so as to achieve the purpose of screening.

First of all, the vibration motor is also a motor, but why is it called a vibration motor? Because it vibrates, the exciter is also the same principle The two are similar, haha, nonsense, let me talk in detail about the working principle and use of the vibration motor, I believe you can understand, give it to me.

In industrial production, it is often necessary to divide various raw materials (such as ore, coal, stone, etc.) and various primary products (such as cement, salt, monosodium glutamate, etc.) into several levels according to the particle size of the material, or remove the moisture and impurities in it to carry out the next step of processing and improve product quality, which requires the use of screening machinery.

Vibrating screen is a common screening machine, and it has a wide range of applications in all walks of life. From mining to metallurgy, from building materials to electric power, from road and bridge construction to food and chemical industry, there are vibrating screens working everywhere. It is no exaggeration to say that a qualified, high-quality product cannot be manufactured without a vibrating screen.

The more commonly used vibrating screens include circular vibrating screens and linear vibrating screens. The movement trajectory of the circular vibrating screen box (which can be seen at any point on the screen body) is circular or elliptical. Generally, the vibrator of the circular vibrating screen has only one shaft, so it is also called a single-shaft vibrating screen.

The circular vibrating screen is mainly used for the classification of materials of various particle sizes, and is generally installed at an angle, with seat type and hanging type. It works reliably and has a high screening efficiency.

The movement trajectory of the linear vibrating screen box is straight or close to straight line, and it has two axes, so it is also called a double-axis vibrating screen. Linear vibrating screen is installed horizontally or incliningly, this kind of vibrating screen has compact structure and stable operation, and is widely used in dehydration, desliming and demediation of various materials, and is also used for dry and wet classification operations of medium and fine particle size materials. So, how does a vibrating screen work?

And how does it screen the material?

We all have the experience that when a car turns, the body of the person sitting in the car tilts to the other side of the turn, which is called centrifugal force. The vibrating screen works by an inertial vibrator made according to this principle.

People install an eccentric body on the shaft, and use an electric motor (or other power machine) to drive it to rotate, and then the eccentric body generates an outward (relative to the shaft) force, (like a person sitting in a car) the greater the mass of the eccentric body, the farther away from the shaft, the higher the speed of the shaft, and the greater the centrifugal force. Unlike a car turn, this eccentric body moves in a circular motion, producing a continuous force in the circumferential direction. This is the vibrator (or exciter), which can be installed in the appropriate way and in the appropriate position of the screen machine, which can drive the screen machine to do circular motion, and the circular vibrating screen will be generated.

Install two such shafts with eccentricities side by side, so that they are synchronized (the initial position of the eccentrics is the same) and rotate at the same speed in reverse, so that the forces generated by the two eccentrics in the horizontal direction are equal in magnitude and opposite in direction, and thus cancel each other out; The forces of equal magnitude and direction generated in the two vertical directions are added together, so that a linear motion is generated, which is the working principle of the linear vibrating screen.

Excite the twigs and build up the force"English comparison.

exciting force;

Excitation force"Explanation of Mengwei in the academic literature.

1. The periodic simple harmonic vibration generated by the rotating unbalanced mass as the vibration source of the vibration system is called the excitation force. This unbalanced mass is a vibrating polarizer. The sliding table vibratory molding machine vibrating table is designed according to this principle.

Centrifugal force is the reaction force that produces centripetal force due to the circular motion of an object, such as the spinning bucket of a washing machine using the principle of centrifugal motion. The centrifugal force is generated under two conditions, and is generated by the interweaving of the inertial motion force of the object and the central binding force, and the matter that is free from the central binding force is centrifuged.

Excitation force is the force that excites moving parts and specimens by a vibrating generator to produce vibration.

The low-power electric exciter is used to drive the hydraulic servo valve, and the hydraulic pressure medium in the pipeline is controlled and controlled, and Peiqiao generates a great excitation force on the piston in the hydraulic cylinder, so that the excited parts can get early vibration.

The vibration motor itself can be used as an excitation source, while the exciter needs to be used as an excitation source with an ordinary motor.