Proper use and maintenance of hydraulic presses under high temperatures

    In some harsh working environments, whether the hydraulic press is a four-column hydraulic press, a single-column hydraulic press, a double-column hydraulic press, a frame hydraulic press, or a horizontal hydraulic press, the use of the hydraulic system not only greatly reduces labor intensity, but also improves production safety. However, the hydraulic system of the hydraulic press often fails due to improper use and poor management, causing huge losses.

    Dongguan Shengshi Weiye Hydraulic Machinery Manufacturing Co., Ltd. teaches you that the main effects of high-temperature working environments on the hydraulic system are: the viscosity of the hydraulic oil decreases, the volumetric efficiency of the hydraulic pump decreases, and the decrease in viscosity can also cause unstable flow in small holes or gaps, and the adjustment Speed ​​characteristics are out of tune. The strength of the oil film decreases, the lubrication performance decreases, and the friction increases, causing the system to heat up, forming a vicious cycle. The oil accelerates oxidation, deteriorates its performance and reduces its service life. High temperatures cause components to heat up and deform, resulting in poor fitting accuracy. Motion side effects with different thermal expansion coefficients cause gap changes, and even "stuck" phenomena occur. High temperature shortens the life of seals. At the same time, because the hydraulic system is in a high-dust working environment, dust can easily invade the inside of the system through the vent hole of the oil tank, the piston rod of the hydraulic cylinder at the filling port, and the pipe connections, etc., causing hydraulic failure. Oil contamination.

 

    Key points for the use and maintenance of the hydraulic system of hydraulic presses: The characteristic of the hydraulic system under high temperature and high dust is to use the largest possible oil tank and rely on the natural heat dissipation of the oil tank to meet the system's temperature requirements. If conditions permit, a cooler can be used. Pay attention to prevent leakage and prevent smoke and dust from contaminating the hydraulic system. To prevent fires caused by hydraulic oil leakage, flame-resistant or non-flammable hydraulic oil should be used, such as emulsified hydraulic oil, water glycol hydraulic oil, etc. Flame-resistant or non-flammable hydraulic oil has higher requirements on components. For hydraulic systems that cannot use flame-resistant or non-flammable hydraulic oil, it is particularly important to prevent leakage. The main measures are as follows:

 

1）Replace hydraulic machine seals regularly. Since the system works in a high-temperature environment for a long time, the internal seals of the hydraulic machine are prone to aging. Aged seals must be updated in a timely manner. Generally, the seal life of a hydraulic system working at high temperatures will be shorter than that of seals working at high temperatures. It is necessary to find out the life span of the seal in actual work so that the seal can be replaced in time.

 

2）Change the hydraulic oil of the hydraulic machine regularly. The hydraulic system is used under high temperature and high dust, and the hydraulic oil will gradually age and deteriorate over time. Regular replacement of the hydraulic oil will prevent leakage.

 

  Dongguan Shengshi Weiye Machinery Technology Co., Ltd. specializes in the production of Forging Press, Deep Drawing Hydraulic Press, Gravity Casting Machine, Four-column Servo Press, C Type Pneumatic Press and other machines. Friends in need are welcome to pay attention and learn more.