Process Design: 【One Question per Day】2011-01-19 (Wednesday)
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The last edit to this post was made by Litaotao1314 on 2011-1-19 at 20:37. Fill-in-the-blank question: The mechanical energy losses inside a centrifugal pump can be divided into three types: ( ), ( ) and ( ). Note: 1) The first 50 participants will definitely receive a reward ； 2) Please hide your reply answers. Method to hide them: http://bbs.hcbbs.com/thread-492556-1-1.html After replying, please do not edit it. 3) The answers are as follows: volumetric loss, hydraulic loss, and mechanical loss.
Loss of kinetic energy, potential energy, and static pressure energy... It’s a guess; no need to blame me if I’m wrong.
I can only think about friction; I have no other ideas
Volume loss, mechanical loss, hydraulic loss
Volume loss, mechanical loss, hydraulic loss
Volumetric loss, hydraulic loss, mechanical loss
Hydraulic losses, solvent losses, mechanical losses. 1. Hydraulic loss is caused by the impact, turbulence, and surface friction of the liquid inside the pump. Impact and eddy current losses are caused by changes in the direction of the fluid flow. When a liquid flows through a channel it comes into contact with, surface friction always occurs. The resulting energy loss depends primarily on the length, size, shape, and surface roughness of the channel, as well as on the flow velocity and properties of the liquid. 2. Volume loss: Volume loss is the result of a portion of the liquid that has already gained energy flowing back within the pump and leaking out. The volumetric efficiency h capacity of the pump is generally between 0.93 and 0.98. Improving the seal ring and seal structure can reduce leakage and increase volumetric efficiency. 3. Mechanical losses: Mechanical losses refer to the frictional losses between the sides of the impeller cover and the liquid inside the pump casing, also known as disk friction losses. They also include the frictional losses that occur when the pump shaft moves relative to mechanical components such as packings, bearings, and balancing devices. Generally, the former type of loss predominates.
Volumetric loss, hydraulic loss, mechanical loss
Volumetric loss, hydraulic loss, and mechanical loss