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Article: Back To The Basics Part III: The Fundamentals Of Piston Pumps.
- Article from:
- Diesel Progress North American Edition
- Article date:
- July 1, 2000
- Author:
CopyrightCOPYRIGHT 2000 Diesel & Gas Turbine Publications. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Perhaps one of the most familiar components in today's mobile equipment is the hydraulic piston pump. In its simplest form, the piston pump consists of a cylindrical member capable of linear motion within its bore (Fig. 1). As the piston is withdrawn the volume increases, (Fig. la) causing a reduction in pressure -- commonly known as suction. If connected to a source of fluid, atmospheric pressure will cause fluid to flow into the cylinder.
At the end of the suction stroke, (Fig. 1b) the maximum quantity of fluid will have been inducted. This would be the displacement (Vd) of the single piston unit. If the direction of motion is reversed, fluid is forced out ...