Created on:2021-05-20 10:27

Test method of hydraulic vane pump

Test method of hydraulic vane pump

(1) Scope. This standard specifies the basic parameters, technical requirements, test methods, inspection rules, marking and packaging requirements of hydraulic vane pump (hereinafter referred to as vane pump). This standard is applicable to vane pump with hydraulic oil or other liquid with equivalent performance as working medium.

(2) Terms and definitions. The following terms and definitions established in GB / T 17446 are applicable to this standard.

① Rated pressure. Continuous operation within the specified speed range, and can ensure the maximum output pressure of design life.

② No load pressure. The output pressure shall not exceed 5% of the rated pressure or 0.5MPa.

③ Closure pressure. The pressure on the rated output characteristic curve to make the output flow zero.

④ Nominal displacement. The nominal value of geometric displacement of hydraulic pump.

⑤ No load displacement. Displacement measured at no load pressure.

⑥ Rated speed. Under the condition of rated pressure and specified oil inlet, the maximum speed can guarantee the design life.

⑦ Minimum speed. The minimum speed allowed by the rated pressure to ensure stable output.

⑧ Rated working condition. Operating conditions under rated pressure and rated speed (variable displacement pump at maximum displacement).

⑨ Output characteristic curve. The relation curve of output flow to output pressure.

⑩ Hysteresis. On the output characteristic curve, the ratio of the maximum pressure difference between two points producing the same flow rate to the closure pressure is expressed as a percentage.

⑪ Turning point. On the output characteristic curve, the point where the slope changes the most.

(3) Quantities, symbols and units (table below)

 

Quantities, symbols and units

name

符号

单位

压力

P

kPa或MPa

压差

Δp

kPa或MPa

排量

V

mL/r

转速

n

r/min

容积效率

ηv

-

总效率

ηt

-

真空度

 

kPa

体积流量

qv

L/min

转矩

T

N·m

功率

P

kW

温度

θ

运动黏度

υ

mm2/s

 

(4) Classification, basic parameters and marking

① Classification. Vane pump is divided into two types according to its working function

a. Constant displacement pump (rated pressure: PN ≤ 6.3MPa; 6.3MPa < PN ≤ 16MPa; 16MPa < PN ≤ 25MPa);

b. Variable displacement pump (rated pressure: PN ≤ 16MPa; 16MPa < PN ≤ 25MPa).

② Basic parameters. The basic parameters of vane pump should include: rated pressure; rated speed; nominal displacement.

③ Mark. Clear and permanent marks or nameplates shall be made at appropriate and obvious positions on the products. The contents of marks or nameplates shall comply with the provisions of GB / T 7935, and the graphic symbols used shall comply with the provisions of GB / T 786.1.

Home    Article    Test method of hydraulic vane pump