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1.何谓单体泵?它有哪些特点? 答:单体泵是柱塞式喷油泵的一种,它在柴油机上的布置是每缸一泵,按缸排列,不合成一体。所以,亦称其为分列式喷油泵。在国产拖拉机上,手扶拖拉机的柴油机是采用单体泵。单体泵在结构上具有以下特点: (1)泵本身不设单独的凸轮轴,而是与配气机构共用一根凸轮轴。 (2)用于多缸柴油机的单体泵,每缸设一个,并采用2～3个螺栓固定在机体上。由于泵靠近发动机气缸,使高压油管既短又匀,在很大程度上可避免管的液力效应不良影响,使各缸供油特性趋于一致。
1. What is a single pump? What are its characteristics? A: The single pump is a plunger pump, diesel engine layout is a pump per cylinder, arranged by cylinder, not integrated. So, also known as split-type fuel injection pump. In the domestic tractor, walking tractor diesel engine is a single pump. Unit pump in the structure has the following characteristics: (1) The pump itself does not set a separate camshaft, but with the valve body share a camshaft. (2) For the multi-cylinder diesel engine single pump, set up a cylinder, and with 2 to 3 bolts fixed on the body. As the pump close to the engine cylinder, so that the high-pressure tubing is short and uniform, to a large extent, to avoid adverse effects of the hydraulic effects of the pipe so that the fuel supply characteristics of the cylinder tends to be consistent.