Radial-piston hydraulic motors 4070, 6070, ГРП-7К

Radial-piston hydraulic motors 4070, 6070, ГРП-7К
Radial-piston hydraulic motors 4070, 6070, ГРП-7К

High-torque radial-piston hydraulic motors in rotating housings, types 4070, 6070 and ГРП-7K are designed for usage in hydraulically-driven mechanisms installed aboard ocean-going ships and in cargo-handling devices of general industrial application.

Standard size ГРП-7K is the modification of the hydraulic motor 4070 utilizing structural elements of the latter.

All hydraulic motors can be customized. Hydraulic motors 4070, 6070 can be supplied complete with a valve of two-step torque and rotational frequency control.



Basic technical data
Parameter Rating for standard size
4070 6070 ГРП-7К
Displacement, cm³:
- step 1 9240 11080 7130
- step 2 4620 5540 -
Pressure, MPa:
- rated 14,3 14
- maximum 17,5 25
Rotational frequency, rpm:
- rated 32 27 40 max(70)
- maximum 64 54 -
Specific theoretical torque, N•m/MPa:
- step 1 1470 1763 1135
- step 2 735 881,5 -
Hydraulic efficiency, not less 0,97 0,95
Full efficiency, not less 0,92 0,9
Kinematic viscosity of working fluid (rated), m²/s (sSt) 0,45 (45)
Mass, kg:
- without working fluid 546 710 567
- with working fluid * 556 720 598

Note: *Turbine oil Т46, GOST 32-74 and turbine oil with additives Тп46, GOST 9972-74 are used as working fluids.