空气混入油液与空气溶解在油液小是两个不同的现象。油液从高位流回油箱,由于旋涡效应吸人空气团,在液面上形成了一层油气泡,俗称油沫。在常温常压下,这种以游离状态存在于液压油中的小气泡在0.2～0.3％以上。在油气接触的过程中,有一部分气体溶解在油液中。静置在透明的玻璃管中的石油基油液,肉眼看不见的气体溶 Air mixed with air and oil in the oil is a small two different phenomena. Oil flows back to the tank from a high position, attracting air masses due to the vortex effect, forming a layer of oil and gas bubbles on the liquid surface, commonly known as oil foam. Under normal temperature and pressure, the small bubbles existing in the hydraulic oil in a free state are 0.2-0.3% or more. During the gas-oil contact, some of the gas dissolves in the oil. A petroleum-based oil that is left in a clear glass tube is invisible to the naked eye