Created on:2021-05-12 09:03

Test method of hydraulic axial piston pump

Test method of hydraulic axial piston pump

(1) Scope. This standard specifies the basic parameters, technical requirements, test methods, inspection rules, marking and packaging requirements of hydraulic axial piston pump (hereinafter referred to as axial piston pump). This standard is applicable to axial piston pumps with hydraulic oil or other liquids with equivalent performance as working medium and rated pressure ≤ 45MPa.

(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 Maximum pressure. The maximum output pressure allowed for short-time operation.

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

(3) Quantities, symbols and units. The quantity, symbol and unit are the same as those of gear pump, see the table below.

 

Quantities, symbols and units

name

符号

单位

压力

p

kPa或MPa

压差

△p

kPa或MPa

体积流量

qv

L/min

排量

V

mL/r

转速

n

r/min

转矩

T

N·m

功率

P

kW

温度

θ

运动黏度

υ

mm2/s

容积效率

ηv

-

总效率

ηt

-

真空度

-

kPa

(4) Classification, basic parameters and marking

① Classification. Axial piston pump is divided into swash plate axial piston pump and swash shaft axial piston pump. Axial piston pump is divided into quantitative axial piston pump and variable axial piston pump according to flow output characteristics.

② Basic parameters. The basic parameters of axial piston 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.

 

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