Centrifugal pump basic equations of hydraulics

Centrifugal pump work, the liquid on the one hand with the impeller rotation, at the same time from the rotating impeller outflow. Centrifugal pump impeller at any point i of the absolute velocity ci is equal to the circumferential velocity "ui and the relative velocity hoe i and the vector, that is: Ci = ui + wi (2-3) where ci - i point absolute flow Velocity in m / s; ui - velocity of the liquid at i-point with impeller rotation, ie the circumferential velocity in m / s; wi - velocity of the liquid in point i relative to the rotating impeller in m / s; шi and "цi the opposite direction of the angle, said the relative flow angle. The three velocities form a closed triangle called the velocity triangle, see Figure 2-5. Figure 2-5 Speed ​​Triangle The speed triangle reflects the flow of liquid in the impeller. Euler equation - basic equations of centrifugal pump hydraulic The impeller into the impeller to increase energy, the establishment of the impeller on the liquid work and the relationship between liquid state of motion energy equation, the centrifugal pump's basic equation - Euler equation. It can be derived from the moment of momentum theorem. Where HT - the theoretical lift of the centrifugal pump, m; C2u - the absolute velocity of the impeller exit in the circumferential direction of the absolute velocity, m / s; C1u - impeller inlet flow rate in the circumferential direction of the absolute velocity , M / s; U2 - the peripheral velocity at the impeller exit (uz = R2 co), m / s; U1 - the peripheral velocity at the impeller inlet (ul = R1), m / s. When the flow without pre-rotation into the impeller, t71. Euler equation can also be abbreviated as: Euler equation can be seen that the centrifugal pump theoretical lift HT depends on the pump impeller geometry, working speed, and the characteristics and density of the transmission medium has nothing to do. The same pump therefore operates at the same speed and flow rate and the theoretical lift given by the impeller is the same irrespective of the liquid delivered (eg water and mercury). The Euler equation can also be derived from the cosine theorem by the following form: where the centrifugal force in the impeller unit mass of liquid to do; unit mass flow through the impeller when the relative velocity of reduction obtained; unit mass flow through the impeller kinetic energy Increment.

    As a leading Stainless Steel plant, NINGBO QIYI PRECISION METALS CO., LTD specialized in manufacturing of Stainless Steel Coil in china. Raw stainless Steel Coil are buying from world`s leading mills.

Qiyistainless steel plish is equipped with state-of-the-art equipments,such as 20-roller sendzimir mills, continuous bright annealing furnaces,  skinpass processing, tension levelers, degreasing cleaning lines, precision slitters and cut to length lines(flying shears).

Qiyi metal has 6000mt/month production capacity , follow customer`s requirements to manufacture cold rolled stainless steel coil. Enthusiastic to serve our clients with comprehensive set of products which include BA, 1D,2D,CSP(1/2H,3/4H,H,EH) finish ,covering300 series,400 series stainless steel coil with different hardness, gauge ranging from 0.05mm to 1.0mm and width from 10mm to 800mm.

    


We supply the finished products according to international standard like CNS, JIS ,EN, AISI and ASTM. Many products are qualified by known customers, such as Samsung, LG, MEDI, etc.

Our stainless steel coil product is widely used in various applications, including medical equipment, food industry, construction material, kitchen utensils(stainless steel disc, stainless steel pot), stainless steel kitchen sinks, auto parts,washingmachines,bbq grill, building construction, electric equipment, chemical tank, pipe, medical equipment and automotive hardware etc.

The sizes or thickness of stainless steel coil can be customized, if you need further information for stainless steel related items, please contact us anytime.

Stainless Steel Coils

Braided Hose,Stainless Steel Tube,Stainless Steel Pipe

Ningbo Qiyi Precision Metals Co., Ltd. , http://www.qiyi-metal.com