Heavy equipment comes in many models. Mechanical equipment produces vibration and noise when stamping and working workpiece. Noise transmitted directly through the air is called first class noise and is usually handled by sound insulation chambers or barriers. Another kind of noise is that vibration spreads to the surrounding environment through the equipment foundation, leading to floor vibration and building walls, producing structural noise, known as secondary noise, which requires the installation of shock absorbers or elastic vibration isolation foundation.
In the actual production layout, the distance between the equipment and the measuring instrument is small, allowing more efficient use of workshop space and improved production efficiency. The vibration generated by the equipment is very large and seriously affects the surrounding processing equipment and measuring instruments. At the same time, it has had a serious impact on the lives of the people around it and the production of the factories. Therefore, it is necessary to isolate vibration.
How to select vibration isolators for different machines?
The vibration control system is also different for different forging machines. Should be designed according to the capacity of the machine, working environment, operation mode and so on. Anyang forging with more than 60 years of forging equipment manufacturing and installation experience, sorted out the following forging equipment isolation equipment design and installation recommendations.
Small and medium mechanical vibration isolators
Small and medium-sized press generally can directly put the vibration isolator on the base, no separate base, double point press can directly put the vibration isolator under the base. A single point press can place the isolator directly on the bottom, or the steel plate can be placed on the bottom and the isolator can be placed under the steel plate to increase stability and reduce the vibration range.
How to choose shock absorber for large mechanical equipment
During the operation of large equipment, some of the energy will deform the metal, and the rest of the energy will disperse to the ground, causing a lot of vibration. At the same time, bottom-mounted spring isolators and viscous dampers have become the industry's international standard as more and more high-precision test equipment and machine tools are installed around them. Direct spring support is a standard solution for all mechanical operations. Only for machinery that allows only small working displacements should concrete foundation blocks be added as additional mass.
Selection method of spring vibration isolator
If the equipment base itself has sufficient stiffness and mass, it can be placed directly on the vibration isolator: otherwise, the steel plate, steel frame or concrete base shall be designed with sufficient stiffness and mass.
The location and number of spring isolators are determined according to the size of the bottom of the machine and the number of feet. Vibration isolators are placed on both sides of the bottom of the machine, and the distance between adjacent vibration isolators should be 1-2 meters. The working load and rated load of the isolator are calculated by the total weight of the machine and the foundation block and the number of isolators. The working load shall not exceed 80% of the rated load.
The vertical natural frequency of the vibration isolation system and the frequency Fe =n/60, determine the vertical natural frequency f0 of the vibration isolation system, so that the smaller the ratio of F0 ≤ Fe / 3F0 to Fe, the higher the vibration isolation efficiency.
According to the rated load F and vertical natural frequency F0, select the appropriate type of shock absorber.
According to the shock absorber stiffness, calibration of vertical compression and natural frequency F0 =5/√, the unit is cm.
Check and adjust the arrangement of isolators so that all isolators have roughly the same support center as the machine. The load center of gravity of the foundation block will not deviate from the theoretical calculation. Tilting during installation can be smoothed out by adjusting the position of the isolators and leveling the plates.