Detailed hydraulic pump characteristics and classification

Brief introduction Hydraulic pump is a pump body, rectangular tank, pressure handle, EHV steel wire braided hose composed of four parts, the hydraulic system of power components, its role is to convert the mechanical energy of the prime mover into liquid pressure energy, refers to the hydraulic system Oil pump, which provides power to the entire hydraulic system. The structure of the hydraulic pump are generally gear pump, vane pump and piston pump. Hydraulic pump fittings are straight-through, self-styled, quick connector three types. Hydraulic pump features 1, hydraulic pump body light, easy to use, high pressure. 2, single-stage pumping station: simple structure, get a larger working pressure. 3, two-stage pumping station: low pressure, high and low pressure pump while oil, get a larger output flow. High pressure, low-pressure pump unloading relief valve automatically back to the empty load. Reduce power consumption. 4, packing function: no leakage in the case of oil, stop pumping pressure for 5 minutes, the rated pressure drop does not exceed 5Mpa. Hydraulic pump classification according to the hydraulic system commonly used pump structure is divided into: gear pumps, vane pumps and columns Plug the pump 3 kinds. Gear pump smaller, simple structure, less stringent requirements on oil cleanliness, cheaper prices; but the pump shaft by the unbalanced force, serious wear and tear, leakage larger. Vane pumps are divided into double-action vane pump and single-action vane pump. This pump flow uniform, smooth operation, low noise, pressure and volumetric efficiency than the gear pump, the structure is more complex than the gear pump. Piston pump volume and high efficiency, small leaks, can work under high pressure, mostly for high-power hydraulic system; but the complex structure, high material and processing accuracy, the price is expensive, the oil cleanliness requirements. Generally in the gear pump and vane pump can not meet the requirements of the plunger pump. There are other hydraulic pumps other forms of hydraulic pumps, such as screw pumps, but not as good as the above three kinds of universal.