What should be considered when selecting Saao hydraulic pumps?

Thread Content

Whether a machine can operate properly is largely determined at the initial stage of selecting a certain hydraulic pump. There are many people around who use Saao hydraulic pumps in practical applications. So today, Autos will talk about what considerations should be taken into account when selecting Saao hydraulic pumps. The main principle for selecting a hydraulic pump is to meet the operational requirements of the system; based on this, the pump’s flow rate, operating pressure, and design type are determined. Determine the rated flow rate of the pump. The flow rate of the pump must meet the requirements regarding the maximum speed of the actuating element; therefore, the output flow rate qp of the pump should be determined based on the maximum flow rate required by the system and the amount of leakage. That is, qp ≥ Kqmax, where qp represents the output flow rate of the pump in L/min, K is the leakage coefficient of the system – generally, K ranges from 1.1 to 1.3 (a higher value is used for longer pipelines, while a lower value is used for shorter ones), and qmax represents the maximum flow rate actually required by the actuating element in L/min. Based on the calculated flow rate, the following situations apply when selecting a pump: ① If the system is supplied by a single pump to one actuator, the hydraulic pump should be chosen according to the highest speed requirement of that actuator. ②If the system is supplied with hydraulic fluid by a single hydraulic pump to several actuating elements, it is necessary to calculate the flow rate required for each actuating element at each stage, create a flow diagram, and select the pump capacity based on the maximum flow rate. ③If the system is supplied with oil by two pumps, a pump with a lower flow rate should be selected based on the maximum feed speed required for normal operation. For rapid feeding, which is powered by both pumps simultaneously, the oil volume required for rapid feeding must be determined based on that speed requirement; the flow rate of the pump with the lower flow rate used for normal feeding is then subtracted from this value, resulting in the flow rate of the pump with a higher flow rate. ④When multiple actuating elements operate simultaneously, the pump flow rate should be determined based on the sum of the maximum flow rates of those elements operating at the same time. ⑤If there is an accumulator in the system to replenish the energy for the actuator, the flow rate specification of the pump can be smaller. ⑥For systems in which the speed is always regulated using a throttle valve during operation, when determining the pump’s flow rate, the minimum discharge volume of the relief valve must also be taken into account (usually 3 L/min). After determining the pump’s output flow rate, select a rated flow rate from the product catalog that is equal to or slightly greater than the calculated pump flow rate qp. It is worth noting that, first, the rated flow rate of the pump selected should not be much higher than the actual operating flow rate, in order to avoid excessive overflow from the pump and resulting significant power losses. Second, since the effect of leakage is taken into account when determining the pump’s rated flow rate, the rated flow rate is higher than the flow rate required for calculation; this will result in a slightly higher actual speed. SAUER-SUNDSTRAND was established in 1987. It was formed by the merger of SAUER-GETRIEBE in Europe and SUNDSTRAND Hydraulik in North America. The production of Saao-Santschuanter products now spans eight ** in the four continents of the world. The products are sold to thousands of manufacturers of non-road vehicles. SAO Yisangsuan Te has focused its main efforts on the markets for off-road vehicles and special-purpose off-road machinery. Applications of SAO include: road rollers, pavers, stabilized soil mixers, concrete mixing and transport trucks, concrete pumps, pharmaceutical machinery, ceramic machinery, aluminum die-casting machinery, metallurgical machinery, construction machinery, chemical processing machinery, and plastic machinery. Common series of SAO hydraulic pumps: PV20, PV21, PV22, PV23, PV90R055, PV90R75, PV90R100, PV90R250, PV90M75, PV90M100, etc. SAO PV23 oil filling pump, PVPV90 oil pump motor, SAO 71.2 reducer, Masore PV089/MF089/TMM089/ARK90 oil pump motor. American SAO hydraulic pump/motor assemblies: PV23/PV22/MF22/MF23/TMM089/90R130 hydraulic pumps; PV20/PV21/PVD21/PV22/PV23/PVD23/PVD45/PV24/SPV6/119/PV25/PV26/PVM018/PVM028/MF035/MF500/MPV046. SAO PV22/PV23 oil pump accessories: oil pump cylinder block, plunger, oil pump distribution plate, oil pump thrust plate, SAO oil pump liner, oil pump return plate, SAO oil pump ball joint, SAO oil filling pump, PV23 integrated valve control valve, oil pump front and rear bearings, SAO main shaft, mechanical control valve, combined seal. It’s not just the SAO hydraulic pumps; the same principle applies when selecting other hydraulic pumps as well. We need to calculate each of the pump’s displacement characteristics in order to choose a SAO hydraulic pump that is suitable for our needs. The above is the information provided by our company. If you would like to know more: Saao plunger pump