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一、前言结构简单、价格便宜、使用可靠的齿轮泵在液压传动的工程机械中占有重要地位。根据日本统计资料,六十年代日本每年生产的齿轮泵中约40～47％(按产值计算)用于工程机械部门。美国的液压传动工程机械一直采用齿轮泵和叶片泵。苏联工程机械和车辆的液压传动系统也采用齿轮泵。由于结构上的原因,齿轮泵的效率低,轴承负载大,因此有所谓齿轮泵效率较低和不适合高压的说法。但是近十几年来,齿轮泵在提高压力和效率等方面取得了很大进展。日本液压工业部门于61～64年间进口欧美
First, the preamble Simple structure, low price, the use of reliable gear pump in the hydraulic transmission of construction machinery occupies an important position. According to Japanese statistics, about 40-47% of the gear pumps produced in Japan in the 1960s (by value of output) are used in the construction machinery sector. The United States hydraulic transmission construction machinery has been using gear pumps and vane pumps. Gear pumps are also used in the hydraulic drive systems of Soviet construction machinery and vehicles. Due to structural reasons, gear pump efficiency is low, the bearing load is large, so the so-called gear pump is less efficient and not suitable for high pressure argument. However, gear pumps have made great strides in improving pressure and efficiency in the past decade or so. Japanese hydraulic industrial sector in 61 to 64 years to import Europe and the United States