Low speed high torque hydraulic motor It mainly has the following main characteristics:;

(1) Low running speed and large output torque.

Low speed applied at home and abroad at present High torque hydraulic motor The rotation speed is generally within 400r/min. Most of these motors have strong low-speed stability. The lower stable rotation speed can reach within 15r/min, some can reach 3r/min, or even within 1r/min. The output torque usually exceeds 100Nm, or even reaches 26 above 10'Nm.

(2) Compact structure, small size and light weight.

In the motor and Reducer 、 High speed hydraulic motor And reducer Low speed hydraulic motor In the three transmission modes, the same output power is output, and the low speed of direct transmission is used Hydraulic motor It is lighter, compact and smaller than the first two. When the same torque is output, the low speed high torque hydraulic motor will Gear reducer The weight of the high-speed hydraulic motor is much lighter.

(3) External installation is simple and convenient.

Because the low-speed high torque hydraulic motor can omit the reducer, or only use the primary reducer with low transmission ratio for transmission, it can reduce the structural size of gear transmission, and has the characteristics of flexible layout, light weight, small inertia torque, good speed regulation performance, and easy completion of overload protection, so it is widely used. It is especially suitable for all kinds of gear drives with low speed and heavy load, such as construction machinery and equipment, ship accessories, lifting and transportation machinery and equipment, construction machinery, metallurgical industry facilities, mining machinery, etc. The guide rail curves of hydraulic motors manufactured before the 1950s are designed according to the geometry, such as arc and straight combination curves and cycloid curves processed with eccentric wheels. The hydraulic motor using this kind of curved raceway often has the situation of "trapped oil" around the inner and outer dead points; Large contact pressure in some areas; The output torque has very large pulse; Low speed working stability is not good enough; The noise is very loud. At that time, the working pressure of the hydraulic motor was still in the low voltage or medium pressure range, and its service life could not meet the requirements.