轴向柱塞泵是活塞或柱塞的往复运动方向与缸体中心轴平行的柱塞泵。
The axial piston pump is a piston pump whose reciprocating motion direction is parallel to the central axis of the cylinder block.
轴向柱塞泵是利用与传动轴平行的柱塞在柱塞孔内往复运动所产生的容积变化来进行工作的。由于柱塞和柱塞孔都是圆形零件，加工时可以达到很高的精度配合，因此容积效率高，运转平稳，流量均匀性好，噪声低，工作压力高等优点，但对液压油的污染较敏感，结构较复杂，造价较高。
The axial piston pump works by using the volume change caused by the reciprocating movement of the plunger parallel to the transmission shaft in the plunger hole. Because the plunger and plunger plug hole are round parts, they can achieve high precision matching during processing, so they have the advantages of high volume efficiency, stable operation, good flow uniformity, low noise, high working pressure, etc., but they are sensitive to the pollution of hydraulic oil, complex structure and high cost.
柱塞泵用柱塞和油缸作为主要工作构件。当柱塞在缸体的柱塞孔中作往复运动时，由柱塞与缸孔组成密闭工作容腔发生容积变化，完成吸，排油过程。
The plunger and oil cylinder are the main working components of the plunger pump. When the plunger moves back and forth in the cylinder plug hole, the volume of the closed working chamber composed of the plunger and the cylinder hole changes, completing the process of oil suction and drainage.