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PM泵说明书
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PY喷油泵使用维修说明书
目 录
前 言
1 PY泵的主要技术规格······················································1
2 PY泵的特点······························································2
3 PY泵的铭牌编号··························································3
4 PY泵（以4缸为例）总成图和主要零件目录····································3
5 结构····································································4
5-1泵体部件·······························································4
5-2泵油系部件·····························································5
5-3油量控制部件···························································5
5-4柱塞的驱动机构·························································6
5-5回油螺钉部件···························································6
6 工作原理································································6
6-1泵油过程·······························································6
6-2供油量的调节···························································7
6-3出油阀的作用···························································7
6-4供油预行程·····························································8
7 使用注意事项····························································8
8 PY泵维修注意事项·······················································9
9 拆卸
9-1准备
9-2泵油系组件的拆卸
9-3拆卸拉杆定位螺钉
9-4油量控制套筒的拆卸
9-5拆卸拉杆
9-6拆卸柱塞
9-7拆卸柱塞弹簧上座
9-8取出弹簧上座和柱塞弹簧
9-9用镊子取出弹簧下座
9-10用卡簧拆装钳取出挺柱体
9-11拆卸凸轮轴
9-12拆卸出油阀组件
9-13轴承的拆卸
部件的检验
10-1柱塞偶件
10-2出油阀
10-3挺柱体
10-4凸轮轴
10-5轴承
10-6中间轴承
10-7柱塞弹簧和出油阀弹簧
10-8出油阀紧座
10-9泵体
10-10“O”形密封圈、衬垫和管接头垫圈
装配
11-1轴承
11-2凸轮轴
11-3轴承盖
11-4测量凸轮轴偏心轮的对称度
11-5测量凸轮轴间隙
11-6挺柱体
11-7弹簧下座
11-8柱塞弹簧
11-9弹簧上座
11-10柱塞
11-11油量控制套筒
11-12出油阀组件
11-13安装出油阀组件
11-14测量拉杆的滑动阻力
调试
12-1供油时间的调整
12-2调整供油间隔角
12-3调整供油量
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前 言
PY型喷油泵是我公司于2005年推向市场的新产品。PY泵适应了车用柴油机向低能耗、低排放发展的趋势，完全满足GB17691—2001标准实施阶段2（简称国2，等同于欧Ⅱ标准）的排放限值的规定。PY泵配机范围为缸径85mm—105mm的多缸直喷增压中冷车用柴油机，对工程农机类柴油机配机缸径可到110 mm。
PY泵虽然继承了柱塞式直列合成泵的传统模式，但通过精巧的结构设计，使它具有了足够的许用泵端压力、供油速率和供油量等工作能力，同时在可靠性和耐
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