联系人：18965852209 QQ：2277643779 （小崔）
1、外啮合齿轮泵一般为定量泵
应用：一般用于低压（<2.5MPa）大流量的场合；
优点：结构简单，尺寸小，质量小，价格低廉，工作可靠，维护容易，对油污染不敏感；
缺点：磨损严重，泄露大，工作压力的提高受限；
2、叶片泵分为单作用叶片泵和双作用叶片泵，单作用叶片泵一般为变量泵，双作用叶片泵一般为定量泵。
应用：一般用于机床、自动化设备中的中低压液压系统中；
优点：工作压力较高，工作平稳，噪声小，寿命长；
缺点：结构复杂，对油污影响较为敏感；
3、柱塞泵分为径向柱塞泵和轴向柱塞泵，可用于变量；
应用：广泛应用于高压、大流量、大功率的系统中以及流量需要调节的场合，比如龙门刨床、拉床、工程机械、船舶上等；
优点：压力高，结构紧凑，效率高，流量调节方便；
缺点：对油污影响很敏感；
液压泵的应用主要总结为：
（1）在机床液压系统中，一般选用双作用叶片泵和限压式变量泵；
（2）在筑路机械、港口机械及小型工程机械中，一般采用抗污染性能较强的齿轮泵；
（3）在负载大、功率大的场合，一般采用柱塞泵。
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