Pipe diameter, pipe arrangement, check valve, flow,Reasonable choice of Voith gear pump pipe diameter should be considered from a technical and economic point of viewAccording to Edison, R&D department of A&S Hydraulic Parts Co.,Ltd w,
First, the Voith gear pump should pay attention to the following when designing the pipeline:
A. Reasonably choose the diameter of the Voith gear pump pipe. The pipe diameter is large. Under the same flow rate, the flow velocity is small, the resistance loss is small, but the price is high, and the pipe diameter is small, which will lead to a sharp increase in the resistance loss, so that the lift of the selected pump Increase, with increased power, cost and operating costs increase. Therefore, it should be considered from a technical and economic perspective.
B. The discharge pipe and its pipe joints should take into account the maximum pressure that can be withstood.
C. Pipe arrangement should be arranged as straight pipe as much as possible, minimize the attachments 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 side of the pump must be equipped with a valve (ball valve or globe valve, etc.) and a check valve. The valve is used to adjust the operating point of the pump. The check valve prevents the pump from reversing when the liquid is reversed, and prevents the pump from hitting the water hammer. (When the liquid flows backwards, it will generate a huge reverse pressure, which will damage the pump)
Second, the impact of Voith gear pump flow head
Determination of traffic
A. If the minimum, normal, and maximum flow rates have been given in the production process, the maximum flow rate should be considered.
B. If only normal flow is given in the production process, consideration should be given to leaving a certain margin.
For the ns100 high-flow low-lift pump, the flow margin is 5%, for the small-flow high-lift pump of ns50, the flow balance is 10%, the pump with 50≤ns≤100, the flow margin is also 5%, the quality For pumps that are inferior and have poor operating conditions, the flow margin should be 10%.
C. If the basic data is only for weight flow, it should be converted to volume flow.