How should the hydraulic oil pump matched with the hydraulic pump motor be selected? Dalan Motor tells you that it can be easily solved based on the following five aspects.
How should the hydraulic oil pump matched with the hydraulic pump motor be selected? Dalan Motor tells you that it can be easily solved based on the following five aspects.
1, liquid properties
1 includes the name of the liquid medium, physical properties, chemical properties, and other properties.
2 physical properties are temperature c, density d, viscosity u, solid particle diameter and gas content in the medium, etc., which involves the pressure of the system, the required power calculation and the type of suitable pump.
3 chemical properties, mainly refers to the chemical corrosiveness and toxicity of liquid media, is an important basis for the selection of oil pump materials and which type of shaft seal type is used.
2, liquid delivery
1 Flow rate is one of the important performance data of the optional oil pump, which is directly related to the production capacity and conveying capacity of the entire device.
2 When the cycloidal gear pump is selected, the normal flow rate is based on the maximum flow rate. When there is no maximum flow rate, 1.1 times the normal flow rate can be taken as the maximum flow rate.
3 General industrial pumps can ignore the leakage in the pipeline system in the process flow, but must consider the impact on the flow when the process changes.
3, device pressure
1 The pressure required by the system is another important performance data of the gear pump. Generally, the pressure of the 5%-10% balance is used to select the model of the cycloidal gear pump.
2 includes: suction tank pressure, drain tank pressure, pressure drop in the piping system (pressure loss).
4, pipeline layout
1 The pipeline arrangement conditions of the oil pump system refer to the liquid feeding height, the liquid feeding distance, and the liquid feeding direction. For system pressure calculation and power check.
2 Piping system data should also be made to the device characteristic curve if needed.
3 When designing the layout of the pipeline, you should pay attention to the following matters:
a. Reasonably choose the diameter of the pipeline, the diameter of the pipeline is large, the flow velocity is small, the resistance loss is small, but the price is high, and the diameter of the pipeline is small, which will lead to a sharp increase in the resistance loss and increase the pressure of the selected pump. With increased power, both cost and operating costs increase. Therefore, it should be considered from a technical and economic perspective.
b. The discharge side of the pump must be equipped with a valve and a check valve. The valve is used to adjust the operating point of the pump, and the check valve prevents the oil pump from reversing when the liquid is reversed.
c. The pipe arrangement should be arranged as straight pipe as much as possible. Minimize the accessories in the pipe and minimize the length of the pipe. When turning, the bending radius of the elbow should be 3 to 5 times the diameter of the pipe, and the angle should be as large as 90. °C.
d. The discharge pipe and its pipe joints should take into account the maximum pressure that can be withstood.
5, operating conditions
The operating conditions of the oil pump are many, such as the operating temperature of the liquid, the suction side pressure, the discharge side vessel pressure, the altitude, the ambient temperature, whether the operation is gap or continuous, and whether the position of the gear pump is fixed or movable.
----- Editor-in-Chief: Dalan Oil Pump Motor 02-Procurement Consultant
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