Product identification description

Matters needing attention

To ensure optimal operation of the motor, please strictly follow the guidance below:

1.Oil temperature: normal condition 20℃-60℃, maximum temperature: 9o'℃ (for no more than 1 hour).

2.Filtering and oil cleanliness: a filter should be installed in the oil ircuit (backflow) with the fitration precision level of 10-30um.A magnetic equipment should be installed at the bottom of the oil tank to prevent any grits, waste or solid particles from enteringthe oil circuit. The maximum oil contamination level by solid particles is no more than 19/16.

3.Hydraulic 0il Viscosity.42-74 mm2/s at 40'℃ of oil temperature.Appropriate type of hydraulic oil hould be applied accordingto the actual working conditions of the system.

4.The motors can operate in parallel or in series connection. When the back pressure exceeds 10MPa (or rotation speed exceeds200rpm), an external drain pipe must be connected between the oil drain port and the tank for pressure relief.

5.For EPMZ and EPMZR series motors, customers may choose the type of output shaft according to their application require-ments as follows:

5.1 The output shaft with radial bearings that is able work with a certain level of radial force.5.2 The output shaft without radial bearings which is unable to work with radial force.

ln case that radial force exists, radial work load on the output shaft, must be discharged.

6.ForEPMZ1,EPMZ2, and EPMZ3 series, the output shaft is radial force tolerant, but is unable to bear considerable level of axialwork load.

7.For EPMZS,EPMZY,EPMZT and EPMZV Types, the output shaft is able to work with considerable amount of work load fromboth axial and radial directions.

8.The optimal work conditions should be maintained at 1/3~2/3 of the rated work conditions.

9.To obtain a longer service life of the motor, a run-in period of no less than one hour should be in place under 30% of the ratedpressure before putting the motor under actual workload.

10.The motor must be filled up with sufficient oil in the casing for the lubrication of the dynamic components before running withload.

Computational formula

①    The actual output torque of the hydraulic motor：M=0.159（P1-P2）V·ηm（N.m）

Where：P1、P2------------------------- Inlet and outlet pressure（MPa）

V--------------------------------- Displacement（ml/r）

ηm------------------------------- Mechanical efficiency（%）

②    Output power of the hydraulic motor：

N=（M·n）/9950（kW）N=[q（P1-P2）/60000]·ηm·ηv（kW）

Where：n-------------------------------- Rotation speed（r/min）

q-------------------------------- Input flow（ml/min）

ηv-------------------------------- Volumetric efficiency（%）

③    Rotating speed of the hydraulic motor：

n=q/V·ηv（r/min）