Due to the advantages of large crushing ratio, high productivity, and uniform completion of the discharge granules, the heavy hammer crusher has become a widely used crusher equipment for mining machinery. However, after a long period of operation and work, especially the hammer crusher produced by some small manufacturers, vibration imbalance and loud noise appear. Here, the senior editor of Longjian Group discusses with everyone, why is the vibration of the hammer crusher unbalanced? How to solve the problem of abnormal vibration and noise?

What are the causes of the vibration imbalance of the heavy hammer crusher?

1. The rotor is unbalanced. This is the main reason for the vibration of the heavy hammer breaking vibrating machine, which will constitute the uneven stress of the rotor shaft. Rotor unbalance includes structural unbalance and quality damage. Unbalanced structure means that the structure is asymmetrical and the texture is uneven. Quality damage refers to the rotor parts falling and wearing, which constitutes a painful rotor quality.

2. The vacancy of the device is too large. Because of long-term operation, the rotor shaft and bearing, bearing inner ring and outer ring, adhere to the frame and the ball, the space between the outer ring of the bearing and the inner ring of the bearing seat will increase. After the vacancy is increased, the rotor shaft will shake up, down, left, and right under the high-speed operation of 970r / min, so that the vibration of the whole hammer breaks out of balance.

3. The quality of the hammer head is inappropriate. The quality of the hammer head plays an important role in maintaining the balance of heavy hammer breaking. If the surface of the hammer head has defects such as air holes, sand holes, sand inclusion, etc., it will constitute an uneven structure and uneven strength of the hammer head, so that the wear of the hammer head is inconsistent when the crusher is moving, and even a single hammer head is cracked, thereby forming the shaft part The stress is added sharply but the crusher vibrates.

② Second, the solution of the vibration and noise problems of the heavy hammer crusher

1. Decrease the noise of sound source: transform the production technology and select low-noise equipment; improve the mining machinery processing and equipment accuracy to reduce the noise of mechanical vibration and conflict; reduce the pressure difference and flow rate for high-pressure and high-speed airflow, or modify the airflow nozzle shape.

2. Control on the way of communication: reasonable planning in the overall layout; use of additional barriers to prohibit noise transmission, or the use of natural shapes such as hills, earth slopes, woods, grass, or huge buildings or additional structures that are not afraid of noise; use The directional characteristics of the sound source to control the noise; such as the high-pressure boiler exhaust steam, blast furnace exhaust, oxygen generator exhaust and other exhaust outlets toward the countryside or sky to reduce the impact on the environment.

3. Personal protection of operating staff. For example, wearing earplugs, earmuffs, helmets and other anti-noise products; selecting workers to rotate operations to shorten the working time of workers in high-noise environments; selecting methods of sound attenuation, sound absorption, sound insulation, vibration isolation, vibration reduction, etc.

In summary, the operator should strengthen the inspection and maintenance of equipment and wear parts during the operation of the heavy hammer crusher. At the same time, strengthen its own personal safety protection, so as to ensure the production and quality of the hammer crusher production line.

Keywords: heavy hammer crusher, vibration imbalance