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Piston pumps are structurally similar to automotive engines. A single-cylinder piston pump only delivers one fluid pulse per revolution, which can cause large pressure spikes in the system. To address this issue, piston pumps in practical applications typically use multiple cylinders and pistons to smooth out the fluid delivery, thus reducing pressure pulses. Designing a compact multi-cylinder pump requires high precision engineering.<\/p>\n
A common design for piston pumps is the radial piston pump. This pump consists of multiple hollow pistons arranged in a fixed cylinder body. Each piston is equipped with a spring-loaded intake and discharge valve. As the internal cam rotates, the fluid is smoothly delivered from the intake to the discharge port. This design is simpler, more reliable, and more economical compared to traditional pumps.<\/p>\n
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Another form of piston pump is the axial piston pump, where pistons are arranged in a rotating cylinder and driven by a fixed inclined plate (commonly called a swash plate). Each piston maintains contact with the swash plate through a spring or a rotating slipper. By adjusting the angle of the swash plate, the pump’s displacement can be controlled; the greater the angle, the larger the displacement. When the angle of the swash plate is zero, the displacement is zero, and it can even reverse the direction of the fluid flow. The angle of the swash plate can be remotely controlled by installing an independent hydraulic cylinder, which allows easy adjustment of the pump\u2019s displacement.<\/p>\n
Another design for axial piston pumps uses a bent-shaft mechanism. The stroke of the pistons is controlled by the angle between the drive shaft and the rotating cylinder, with the pump displacement adjustable by changing the drive shaft\u2019s angle.<\/p>\n
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Piston pumps have extremely high volumetric efficiency, typically over 98%, and can operate at very high hydraulic pressures. However, these pumps tend to be larger and noisier. Compared to vane pumps and gear pumps, piston pumps have a more complex structure, are more expensive, and require higher technical expertise for maintenance. Below is a performance comparison of various types of hydraulic pumps:<\/span><\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”1_2,1_2″ _builder_version=”4.27.4″ _module_preset=”default” width=”90%” max_width=”1332px” global_colors_info=”{}”][et_pb_column type=”1_2″ _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”][et_pb_image src=”https:\/\/pistonpumps.top\/wp-content\/uploads\/2025\/11\/piston-pumps-principle.webp” alt=”Piston pump background” title_text=”piston-pumps-principle” _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”][\/et_pb_image][\/et_pb_column][et_pb_column type=”1_2″ _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”][et_pb_code _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”]<\/p>\n