Identification of Pipeline and Flow Factors in Gear Oil Pump Selection

Identification of Pipeline and Flow Factors in Gear Oil Pump Selection
1、 When designing and arranging pipelines for gear oil pumps, the following precautions should be taken:
A. Reasonably choose the diameter of the gear oil pump pipeline. A larger pipeline diameter can result in lower fluid flow velocity and less resistance loss at the same flow rate. However, a higher price and smaller pipeline diameter can lead to a sharp increase in resistance loss, resulting in an increase in the head and power of the selected pump, as well as higher costs and operating expenses. Therefore, a comprehensive consideration should be given from both technical and economic perspectives.
B. The discharge pipe and its pipe joints should consider the maximum pressure they can withstand.
C. The pipeline layout should be arranged as straight pipes as possible, minimizing the number of accessories in the pipeline and minimizing the length of the pipeline. When it is necessary to turn, the bending radius of the elbow should be 3-5 times the diameter of the pipeline, and the angle should be greater than 90 ℃ as much as possible.
D. Valves (ball valves or globe valves, etc.) and check valves must be installed on the discharge side of the pump. Valves are used to adjust the operating point of the pump, and check valves can prevent the pump from reversing and prevent the pump from being hit by water hammer when the liquid flows back. When the liquid flows back, a huge reverse pressure will be generated, causing damage to the pump
2、 The Influence of Flow and Head of Gear Oil Pump
Determination of traffic
If the basic data only provides weight flow rate, it should be converted to volume flow rate.
If only normal flow rate is given in the production process, a certain margin should be considered.
For high flow low head pumps with ns100, a flow margin of 5% uFF0C is taken. For low flow high head pumps with ns50, a flow margin of 10% uFF0C50 ≤ ns ≤ 100 is taken. For pumps with poor quality and harsh operating conditions, a flow margin of 10% uFF0C should be taken
If the minimum, normal, and maximum flow rates have been given in the production process, the maximum flow rate should be considered.

The above: How to adjust the output flow of hydraulic piston pump?