An alternative definition of specific speed is sometimes used (flowrate per impeller eye rather than total flowrate). The purchaser is cautioned to understand which definition is being used when comparing data. 有时采用另一种代替比转速的定义,使用(轮眼(impeller eye)处的流量,而不是总流量。当比较...
Define centrifugal pump. centrifugal pump synonyms, centrifugal pump pronunciation, centrifugal pump translation, English dictionary definition of centrifugal pump. n a pump having a high-speed rotating impeller whose blades throw the water outwards Coll
High-speed, integral, gear-driven, single-stage overhung pumps shall be designated pump type OH6 (Figure 6). These pumps have a speed-increasing gearbox integral with the pump. The impeller is mounted directly to the gearbox output shaft. There is no coupling between the gearbox and pump; ...
Define diaphragm pumps. diaphragm pumps synonyms, diaphragm pumps pronunciation, diaphragm pumps translation, English dictionary definition of diaphragm pumps. one in which a flexible diaphragm takes the place of a piston. See also: Diaphragm Webster's R
by the definition of pump efficiency (equation(17.21)), added to the steady-state condition(17.39). It follows that the expression (17.43)W(u2−u1)=(1−ηP)PD=(1−ηP)Ps represents the frictional losses that cause an increase in the internal energy of the liquid being pumped. We ...
the impeller enhances the velocity and pressure of liquid then it directs it in the direction of the outlet of the pump. By its easy design, the pump operation & maintenance can be simple and well understood. Here is a question for you, what is the specific speed of the centrifugal pump...
the rotational speed provided by the electric motor, • the diameter of the impeller, • the design of the impeller (characterized by its specific speed), • the actual head against which the pump is operating, • the thermodynamic properties (density, viscosity, etc.) of the produced ...
From an initial design point of view, engineers often use a quantity termed thespecific speedto identify the most suitable pump type for a particular combination of flow rate and head. Pumping power Main article:Bernoulli's equation The power imparted into a fluid will increase the energy of ...
A classification of impellers of centrifugal pumps by speed is given in Table 1, where each impeller type is characterized by the ratio of the outside diameter Dout to the diameter of the intake aperture Dap. Table 1. Classification of impellers of centrifugal pumps according to specific speed ...
speed, compression andpower consumptionof regenerative pumps in the whole range of working pressures. The simplified versions of these equations are presented below using specific coefficientskn. These equations present the most important dependences between the technical parameters of the regenerative pumps...