1 Noise is a problem that almost all mechanical equipment will have, but there are large and small. In order to prevent interference to the surrounding environment and operators due to noise, the improved 315 tonsfour-column hydraulic pressMufflers are installed to achieve the purpose of reducing noise.
2 At present, there are three main types of mufflers suitable for 315 tons of four-column hydraulic press, namely, expansion interference muffler, absorption muffler and expansion interference absorption muffler. The characteristics of these devices are different, and each has its own advantages and disadvantages. The key depends on how we choose them?
3 Although the diameter of the expansion interference muffler is much larger than the diameter of the exhaust hole, the airflow diffuses inside, hits the wall and reflects, interferes with each other, and reduces the intensity of noise, but because its structure is not compact enough, it can only be used to eliminate 315 tons of four-column The medium and low frequency noise in the hydraulic press.
4 The absorption muffler mainly relies on sound-absorbing materials to eliminate sound, so its structure is a relatively simple one of all mufflers, and the holes of the sound-absorbing material are not easy to be blocked, which can better integrate the 315-ton four-column hydraulic press The medium and high frequency noise is eliminated, which is suitable for general pneumatic systems.
5 The remaining one is a combination of the above two mufflers. It can be made by laying sound-absorbing material on the inner surface of the shell of the expansion interference muffler. Because its inlet is opened with many centrosymmetric inclined holes, it can The airflow entering the muffler is divided into many small flows.
6 When it enters the barrier-free expansion chamber, the airflow is greatly decelerated and reflected to the chamber after hitting the wall. The phase five impact and interference of the airflow beam weaken the noise, and then the airflow is discharged into the atmosphere through the porous side wall of the sound-absorbing material, and the noise is weakened again. In contrast, the expansion interference absorption muffler in the 315 tons of four-column hydraulic press in the use of the effect is more ideal, so it is also very commonly used in practical applications.