Created on:2021-05-04 15:50

Experimental data processing and result expression

④ Experimental data processing and result expression

a. Data processing. Using the test data and the following calculation formula, the relevant performance indexes of the tested pump are calculated.

Volumetric efficiency:

ηv=(V2,e)/(V2,i)=(qv2,e/ne)/(qv2,i/ni) ×100%

Total efficiency:

ηt=(pw,eqv2,e-p1,eqv1,e)/2πneT1×100%

Output hydraulic power in kW:

P2,h=(p2,eqv2,e/60000) ×100%

Input mechanical power in kW:

P1m=(2πneT1)60000

Where qv2, I -- output flow under no-load pressure, L / min;

Qv2, e -- output flow at test pressure, L / min;

Qv1, e -- input flow at test pressure, L / min;

NE -- rotational speed under test pressure, R / min;

Ni -- rotational speed under no-load pressure, R / min;

V2, e -- displacement at test pressure, ml / R;

V2, I -- no load displacement, ml / R;

P2, e -- output test pressure, kPa;

P1, e -- input pressure, which is positive when it is greater than atmospheric pressure and negative when it is less than atmospheric pressure, kPa;

T1 -- input torque, n · M.

b. The results were expressed. The test report shall include test data and relevant characteristic curves. Examples of characteristic curves are shown in figures l to P. The test report shall also provide the information of test personnel, equipment, working conditions and basic characteristics of the tested pump.

LMNOP.jpg

(7) Inspection method of assembly and appearance. The inspection method of assembly phase appearance is the same as that of gear pump, see the table below.

Gear pump assembly and appearance inspection method

Serial number

检验项目

检验方法

备注

1

装配质量

采用目测

 

2

气密性

在被试泵内腔充满压力为0.16MPa的干净气体,然后将其浸没在防锈液中,停留1min以上,并稍加摇动,观察液体中有无气泡产生

允许采用“压降法”或其他的方法,但检查效果应等同于上述方法

3

内部清洁度

按JB/T 7858的规定

内部清洁度可以由经过验证的工艺规范保证

4

外观质量

采用目测法

 

 

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