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Consider the following factors when selecting shock absorbers:
1. The vibration isolation of the degrees of freedom is the most basic form. In fact, a vibration system consists of three axes of rotation and a total of six degrees of freedom. Vibration isolation design is to choose support points. Think of the system as a form of freedom as much as possible (multiple calculation methods, refer to relevant books and books on vibration theory)
2. The sign of isolation and prosperity is the transmission rate. Decreasing the natural vibration frequency of the system can reduce the transmission rate and improve the vibration isolation effect.
3. Damping is effective for the amplitude control near the resonance point, but it is not effective in the damping area. Therefore, when selecting the shock absorber, how to select the damping coefficient § is worth noting.
4. The evaluation of transmission rate is relative. It should judge the quality of the vibration isolation system according to the damping capacity of the equipment and the allowable degree of the equipment environment. The simple selection method can be used after determining the support point, and the frequency ratio is used. Generally, the manuals and samples of various shock absorbers generally indicate the three parameters of the rated load, natural frequency and damping coefficient, and the designer can shake The actual situation of the system is selected.
Shock absorber installation:
1, the shock absorber arrangement should be symmetrical to the main inertial axis of the system, simple point, so that the shock absorber symmetrical to the center of gravity layout, this can prevent all aspects of vibration coupling, the complexity of the vibration system is reduced to a degree of freedom of the vibration system.
2. In order to meet the requirements of frequency ratio and load carrying capacity, the shock absorbers can be connected in parallel, in series and in an inclined manner. Their stiffnesses are respectively: parallel type tandem type inclined type
3. The vibration isolation system should reduce the center of gravity as much as possible to ensure that the system has sufficient stability. The methods are as follows: (1) increase the basic quality (2) increase the support point (3) use the hanger form
4, the use of the overall vibration isolation measures: the use of vibration isolation measures for machinery and equipment, the vibration through the foundation to the outside world can be greatly reduced, but the vibration itself is still there, so like fans, pumps and engines to the outside world to transmit media and The mechanical equipment that transmits power must also use elastic couplings on the pipelines and output shafts, such as vibration-reducing nozzles and high-elastic couplings, etc., which is the expected vibration reduction effect of the entire system.
1. The vibration isolation of the degrees of freedom is the most basic form. In fact, a vibration system consists of three axes of rotation and a total of six degrees of freedom. Vibration isolation design is to choose support points. Think of the system as a form of freedom as much as possible (multiple calculation methods, refer to relevant books and books on vibration theory)
2. The sign of isolation and prosperity is the transmission rate. Decreasing the natural vibration frequency of the system can reduce the transmission rate and improve the vibration isolation effect.
3. Damping is effective for the amplitude control near the resonance point, but it is not effective in the damping area. Therefore, when selecting the shock absorber, how to select the damping coefficient § is worth noting.
4. The evaluation of transmission rate is relative. It should judge the quality of the vibration isolation system according to the damping capacity of the equipment and the allowable degree of the equipment environment. The simple selection method can be used after determining the support point, and the frequency ratio is used. Generally, the manuals and samples of various shock absorbers generally indicate the three parameters of the rated load, natural frequency and damping coefficient, and the designer can shake The actual situation of the system is selected.
Shock absorber installation:
1, the shock absorber arrangement should be symmetrical to the main inertial axis of the system, simple point, so that the shock absorber symmetrical to the center of gravity layout, this can prevent all aspects of vibration coupling, the complexity of the vibration system is reduced to a degree of freedom of the vibration system.
2. In order to meet the requirements of frequency ratio and load carrying capacity, the shock absorbers can be connected in parallel, in series and in an inclined manner. Their stiffnesses are respectively: parallel type tandem type inclined type
3. The vibration isolation system should reduce the center of gravity as much as possible to ensure that the system has sufficient stability. The methods are as follows: (1) increase the basic quality (2) increase the support point (3) use the hanger form
4, the use of the overall vibration isolation measures: the use of vibration isolation measures for machinery and equipment, the vibration through the foundation to the outside world can be greatly reduced, but the vibration itself is still there, so like fans, pumps and engines to the outside world to transmit media and The mechanical equipment that transmits power must also use elastic couplings on the pipelines and output shafts, such as vibration-reducing nozzles and high-elastic couplings, etc., which is the expected vibration reduction effect of the entire system.
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