Because hydraulic transmission has the advantages of small component volume, light weight, stable transmission, reliable operation, convenient operation and easy to realize stepless speed change, hydraulic transmission is widely used in the transmission system of mining vehicles or equipment. Hydraulic oil is the hydraulic medium used in the hydraulic system using liquid pressure energy. It plays the role of energy transmission, system lubrication, anti-corrosion, rust prevention, cooling and so on.

正確選用液壓油品種，確保礦山車(chē)輛液壓系統(tǒng)長(zhǎng)期平穩(wěn)、運(yùn)行，是保證連續(xù)生產(chǎn)、節(jié)省材料消耗和提高經(jīng)濟(jì)效益的有效措施。其主要作用表現(xiàn)為：

The correct selection of hydraulic oil varieties to ensure the long-term stable and safe operation of the hydraulic system of mining vehicles is an effective measure to ensure continuous production, save material consumption and improve economic benefits. Its main functions are as follows:

防腐：目前，金屬零件特別是黑色金屬零件是液壓傳動(dòng)系統(tǒng)的主要零件。如果它們長(zhǎng)期暴露在大氣中，由于水和空氣等有害物質(zhì)的侵蝕而生銹，嚴(yán)重危害其使用性能。如果將金屬零件等浸泡在液壓油中，可使金屬零件加工面與水和空氣等有害物質(zhì)隔離，從而減輕腐蝕，防止生銹。

Corrosion protection: at present, metal parts, especially ferrous metal parts, are the main parts of hydraulic transmission system. If they are exposed to the atmosphere for a long time, they will rust due to the erosion of harmful substances such as water and air, which will seriously endanger their service performance. If metal parts are immersed in hydraulic oil, the machined surface of metal parts can be isolated from harmful substances such as water and air, so as to reduce corrosion and prevent rust.

冷卻：液壓油具有良好的熱傳導(dǎo)性，能夠及時(shí)帶走摩擦偶合面所產(chǎn)生的摩擦熱，并能及時(shí)沖洗摩擦偶合面所產(chǎn)生的磨屑等污物，從而達(dá)到降低摩擦偶合面的溫度和減輕其磨損的效果。

Cooling: the hydraulic oil has good thermal conductivity, can timely take away the friction heat generated by the friction coupling surface, and can timely wash the dirt such as wear debris generated by the friction coupling surface, so as to reduce the temperature of the friction coupling surface and reduce its wear.