How to choose a hydraulic pump

According to the number of hydraulic pumps can be divided into single-pump, double pump, multi-pump; according to the hydraulic pump can provide the maximum working pressure size, which can be divided into low pressure pump, medium pressure pump and high pressure pump ; According to the volume change of the hydraulic pump working, it can be divided into the quantitative pump and the variable pump. According to the different forms of the hydraulic pump internal junction, it can be divided into gear pump, vane pump, screw pump and piston pump. Faced with so many kinds of products, the user how to choose the hydraulic pump. How to choose a hydraulic pump 1, the use of hydraulic transmission system pressure and flow gear pump, for example, can be divided into high, medium and low pressure of 3 files. Low pressure ≤ 2.5MPa, medium pressure 8--16MPa, high pressure 20 a 31MPa, at the same time, according to the system flow and motor speed to determine the choice of gear pump displacement. If the system uses a piston pump, the pressure of the system should be 70% to 80% of the discharge pressure of the pump, which not only provides economical but also sufficient pump life cycle. However, as far as possible not to use the hydraulic pump hydraulic diaphragm pump, due to the particularity of the hydraulic system, easy to cause the hydraulic diaphragm built-in safety valve take off, resulting in the system does not work. 2, the system requirements for noise and flow rate of pulsation External gear pump noise larger, large flow rate pulsation, internal gear pump noise smaller, smaller flow rate pulsation; vane pump, screw pump, piston pump Noise is lower, double-acting vane pump than the single-action vane pump noise is lower. In terms of flow pulsation rate, double-acting vane pump flow pulsation rate of the smallest, followed by the plunger pump, and single-acting vane pump, plunger pump flow pulsation rate medium. 3, the work of reliability, service life and price Double-acting vane pump longer life, and single-acting vane pump, piston pump, gear pump, screw pump life is shorter. Compared to the price, the piston pump than the gear pump, vane pump expensive, but the most expensive screw pump, but the reliability of the most stable screw pump, plunger pump, gear pump, vane pump second. 4, the pollution factors Low-pressure gear pump pollution sensitivity is low, allowing the system to select the filter less accurate oil filter; the contrary, high-pressure gear pump pollution higher sensitivity. Screw pump, plunger pump, vane pump oil pollution are more sensitive, you should strengthen the filter. 5, energy-saving point of view In order to save energy, reduce power consumption, variable pump should be used, the best choice of proportional pressure, the proportion of flow control variable vane pump. Double pump, triple pump, multi-pump is also a program of energy-saving. Now the product update speed is very fast, how to maintain the advantages of a class of products not only requires the efforts of manufacturers, but also require users in the production process of opinion for the hydraulic pump this new product, the difficulties it needs to overcome than the traditional The pump is more, but at the same time it also has a further advantage, that is, its creativity and productivity. I believe in the future as long as the relevant work well, the future development of hydraulic pump worth the wait.