In the hydraulic system is the main source of noise pump. Even though it is not a lot of sound power radiated, the pressure fluctuations and structural vibration can also indirectly cause noise machinery and equipment.

       Hydraulic pump noise with increasing power and increasing. Hydraulic power from the pump output pressure is p, g per revolution displacement and speed n of these three parameters determine. These three parameters to the noise of the pump is different. Improve the speed increases the noise of the pump output pressure ratio is much greater role in improving; impact displacement per revolution of the output noise is substantially the same as the pressure.

       In order to make the lowest noise, generally in the selection of the pump, the premise of ensuring the required power and flow, try to choose low speed hydraulic pump (1000, -1200r/min), in practical applications can also use a composite pump (parallel and series hydraulic pump) and unloading circuit to reduce noise.

       (1) hydraulic pump flow pulsation, the resulting export and line pressure pulsation. This inherent flow and fluid pressure pulsations inevitably produce noise.

       (2) the pressure of the hydraulic pump trapped oil zone traffic impact and noise intrusion. The swash plate type axial piston pump, which is located on the dead point in the cylinder during rotation, the fluid pressure in the piston chamber and discharge chamber instantaneously turned on, a sudden increase in suction pressure to the discharge pressure of the oil produced high pressure shock. Similarly, at the bottom dead point, the fluid pressure in the piston chamber and the suction chamber instantaneously switched by a sudden drop in suction pressure to the discharge pressure of the oil, also a pressure shock. At the same time, in the dead center of the liquid to drain plunger chamber cavity intrusion, they produce a so-called "intrusion flow" so that the original inherent flow pulsation pump more intense. Whereby a greater flow noise, which is the main source of the hydraulic pump.

       (3) hydraulic pump oil phenomena is also an important cause of vibration and noise. When in actual use, such as gear pump due to trapped oil to produce large noise, you should check whether the size of unloading tank with design drawings match. When grinding cover charge to ensure that the size of the original unloaded slot unchanged.

       (4) Due to leakage, increase the pressure and flow rate of the hydraulic pump is one of the reasons pulsation noise. Therefore, the elimination of external leakage of hydraulic equipment maintenance, and is an effective measure to reduce noise.

    Shandong Sheng Machinery Co., Ltd. has been dedicated sub-cement products machinery research and development, production and sales, with advanced equipment, superb technology and two years of professional experience, the company has always been at the forefront of research and development center block making machine market development , watching the advanced technology at home and abroad, to develop products for the investment needs of different users, there are block making machine, hydraulic tile machine, cement pipe machine, blender, hanging roller machine, wire rod machine equipment. Currently has 19 branch offices and six foreign countries (Nigeria, Tanzania, Algeria, Kenya, Mozambique, Ethiopia) and exported to more than 100 countries and regions.