cast iron gear motor

gear motor

hydraulic gear motor

Group 1/2/3/3.5

 Gear motor of GRH Hydraulic features floating bush structure with the function of automatic axial clearance compensation. Special abrasion resistance recipe of the bush supplied the long service life; the gear precisely machined ensured the excellent operation with low noise; cold-extrusion profile pump body can endure the pressure over 30Mpa; high strength cast iron of front/back cover is more reliable to operate. It can be widely used in industrial hydraulic system, hydraulic system of mobile mechanism, hydraulic system of aerospace system, hydraulic system on the ship and the hydraulic system on ocean engineering.

    GRH has three series for gear motors ranging from group one to group three. According to rotation, it can be divided into two types, one is single-direction gear motor the other is bi-directional gear pump. Normally structure of single-direction gear motor is similar to that of single-direction gear pump with only slight difference in some respects. Therefore, all the GRH gear pumps have their respective single-direction gear motor. While placing your order, please refer to the phasing code on page.

Hereby we put our focus on bi-directional gear motor. Bi-directional gear motor has different sealing structure with single-direction gear motor. As the drawing shown below, symmetrical sealing structure separates high-low pressure, guaranteeing the possibility of bi-direction operation of gear motor. The oil from inner leakage returns to oil tank through drainage port. Usually, pressure of drainage port is 2-3 bar, that means shaft oil sealing can bear pressure from 2 to 3 bar, and can support pressure of 5 bar in short time. High quality of bush, bearing and sealing kits guarantees outstanding performance of GRH gear motors.