国产精品一区二区资源,成人国产精品免费视频

螺桿泵性能參數(shù)換算	The Count of Characteristic Data of Pump Selected
以下各章均列出產(chǎn)品性能表，當用戶根據(jù)需要在性能表中無法查得軸功率及流量時，可按如下方法近似確定：	When you can"t get the capacity power and capacity from the characteristic table you need count it：
(一)軸功率的換算	(一) The cowt of power
1. 當壓力由P變成P₁而粘度、轉(zhuǎn)速不變時，軸功率N： N = (QP₁/3.67η₀)[1+(η₀/η-1)P/P₁] (Kw) 式中: Q、P均為性能表中列出的接近用戶需用要的那一組流量(m³/h)及壓力值（Mpa）； η、η₀為在性能表標定的流量、壓力時對應(yīng)的總效率及容積效率。它們可在相應(yīng)的η-P曲線圖中查得。曲線均有離散性，按照"隨規(guī)格的增大而取大值" 的原則進行取值。	1.When the pressure is from P to P1,but viscosity and speed do not change,you count the power N: N =(QP₁/3.67η₀)[1+(η₀/η-1)P/P₁] (Kw) Note: The Q, P is the data that you can get from characteristic table Q(m³/h) and P(Mpa). η,η₀is the corresponding total efficiency and volume efficiency when the capacity and pressure is signed by Q, P. You can get them from η-P Drawing.
2. 當粘度從 E 變成 E₁而壓力、轉(zhuǎn)速不變時， N = (QP/3.67η₀)[1+(η₀/η-1)√E₁/E] (Kw)	2. When the viscosity is from E to E₁, but the pressure and speed don"t change, you can count the power: N = (QP/3.67η₀)[1+(η₀/η-1)√E₁/E] (Kw)
3. 轉(zhuǎn)速從 n 變成 n₁時，壓力、粘度不變時，軸功率 N： N = (Qpn/3.67η₀n₁)[1+(η₀/η-1)√n₁/n] (Kw)	3. When the speed is from n to n1, but the pressure and viscosity don"t change, you can count the power N: N = (Qpn/3.67η₀n₁)[1+(η₀/η-1)√n₁/n] (Kw)
(二) 流量的換算	(二)　The count of capacity
1. 對于粘度大于50E 的介質(zhì)，當粘度從E變成 E₁時，流量 Q 變?yōu)?Q₁： Q₁= Q/η₀[1-(1-η₀)1/K] (m³/h) K=(√E₁+1.5)/(√E+1.5) 注：η₀為標定流量Q時的容積效率； E、E₁單位恩氏粘度⁰E 。	1. When the Viscosity is from E1 and they are more than 50E, the capacity will be form Q to Q1: Q₁= Q/η₀[1-(1-η₀)1/K] (m³/h) K=(√E₁+1.5)/(√E+1.5)
2. 當轉(zhuǎn)速從n變成n₁而粘度、壓力不變時，流量Q₁近似為： Q₁= Q/η₀[n₁/n-(1-η₀)] (m³/h)	2.When the speed is from n to n₁, but the viscosity and pressure don"t change, the capacity Q₁can count approximately: Q₁= Q/η₀[n₁/n-(1-η₀)] (m³/h)