What are the basic principle characteristics of a single-plunger hydraulic pump?

Thread Content

Single-plunger pumps possess the basic structural and principle characteristics of positive-displacement hydraulic pumps, which can be summarized as follows: 1. They have three components commonly referred to as the stator, rotor, and plunger; these components vary depending on the design of the hydraulic pump. 2. They feature several sealed spaces that can change periodically, and these spaces are known as working chambers. The working chamber generally consists of three components: the stator, the rotor, and the extruder. When the working chamber functions to draw in oil, it is called the oil suction chamber, and when it functions to discharge oil, it is called the oil discharge chamber. The transition area between the oil suction chamber and the oil discharge chamber is sealed by the surfaces of the relevant components. In order to allow the volume of the working chamber to change, one of the components that make up the working chamber must be a plunger capable of relative movement. The plunger enables the volume of the working chamber to change periodically from small to large, thereby continuously drawing in liquid, and it also allows the volume of the working chamber to change periodically from large to small, thus continuously discharging liquid. 3. It has an oil intake port and an oil outlet port; the oil intake port and the oil outlet port are connected to the oil intake chamber and the oil discharge chamber, respectively. The flow area at the suction port of the hydraulic pump should be large enough to prevent cavitation caused by excessive flow velocity of the oil within that port; whereas the flow velocity at the discharge port can be higher, in order to reduce the size and weight of the pipes. The input parameters of a hydraulic pump are mechanical parameters, while its output parameters are hydraulic parameters. The pressure in the suction chamber of the pump depends on the suction height and the pressure losses in the suction pipeline; the pressure in the discharge chamber, on the other hand, depends on the load and the pressure losses in the discharge pipeline. The theoretical volume of oil delivered by the hydraulic pump is proportional to the volume changes in the working chamber and the number of such changes per unit time, and it is independent of factors such as the discharge pressure. If the theoretical oil displacement of the pump cannot be changed, it is a fixed-displacement pump; if it can be changed, it is a variable-displacement pump. 5. It has a valve distribution mechanism. The transition of the hydraulic pump from suction to discharge or from discharge to suction is known as valve timing. To ensure that the hydraulic pump can draw in and discharge fluid, it should have a corresponding valve mechanism to separate the oil suction chamber from the oil discharge chamber. 6. The local pressure of the liquid in the tank must always be greater than or equal to atmospheric pressure. To ensure that the pseudo-gear pump can draw in oil properly, the fuel tank must be at the same pressure as the atmosphere, or it must be a sealed, pressurized fuel tank. As a professional agency and repair company for hydraulic pumps, Autosys Hydraulic Machinery has accumulated extensive expertise in piston pumps over 12 years of experience, achieving an exceptional level of knowledge in this field. We provide comprehensive analysis of problems for our clients and offer full support throughout the process. As experts in plunger pumps, we speak on behalf of these pumps! Learn more about hydraulic pumps: http://www.aotuoshi.com/products_list.html