The far-field sound pressure spectrum of the compressor with different shell radii indicates the far-field sound pressure spectrum of the compressor when the size of the movement structure changes (ie, the inner diameter changes) under the internal concentrated load. In the case of the same size of the casing, when the equivalent radius of the compressor core increases, the sound pressure increases in the low frequency far field; at high frequencies, the far field sound pressure does not change. Therefore, the movement structure of the compressor should be as small as possible to reduce the low frequency noise and low frequency vibration of the compressor. When the force is constant, the far-field sound pressure of the compressor is related to the density of the refrigerant. As the refrigerant density increases, the far-field radiation sound pressure decreases. In general, the change of refrigerant quality has little effect on the far-field sound pressure of the compressor; the size of the movement is reduced (the inner diameter becomes smaller), the low-frequency noise of the compressor is reduced, and the high-frequency noise remains unchanged. In the case of a certain amplitude, the far field sound pressure of the compressor excited by the radial force is the largest, and the far field sound pressure of the compressor excited by the axial force is the smallest. After the noise reduction and backflow prevention type of the exhaust gas is inserted into the non-conjugate correction type line, a small portion of the high pressure gas will remain in the exhaust chamber at the end of the exhaust, for example, if there is no residual clearance in the exhaust chamber, then the exhaust gas is exhausted. When the volume of the cavity is increased, it will cause reverse flow of the gas flow in the exhaust pipe, increasing noise. When a small portion of the high pressure gas remains in the exhaust chamber, the expansion of the high pressure gas reduces the possibility of backflow and the return flow. Since the clearance volume of the vortex air compressor is isolated from the suction chamber, the negative impact due to the presence of the clearance is still weak. The special-shaped exhaust port technology adopts a non-circular exhaust port shape to increase the exhaust port area, reduce the flow loss of the exhaust gas, and at the same time facilitate the simultaneous exhaust of the working chamber.
There are two types of vertical axis impact crushers. One is the
rock impact metal crusher, where the material is thrown onto the jaw plate
inside the crusher shell. The other is that the crusher has a crushing chamber
that forms the shell. The rock can accumulate in the shell at its natural
resting angle, and the material impacts the rock layer at a great speed,
causing it to undergo some degree of fragmentation. After the rock is thrown
onto an inclined plane, it deflects upwards to the upper part of the crushing
chamber, thus shifting downwards. Then, the rock curtain continuously ejected
from the rotor and subjected to secondary crushing is called a rock impact rock
crusher.
In a vertical impact crusher, the circumferential speed of the rotor
can reach up to 99m/s, and materials with very small particle sizes fed into
the crusher will also be effectively crushed. It does not have an impact hammer
and has minimal metal wear. The particle size of the feed is generally less
than 60 millimeters. It can be used to crush hard abrasive materials,
selectively crush soft and hard materials, and has drying performance. It can
replace rod mills through mixed metals.
Vertical Impact Crusher,Vertical Impact Ore Crusher,Vertical Shaft Impact Crusher SiChuan TieYing Machinery Manufacturing CO.,LTD; , https://www.tieyingcrushers.com