Off-course driving device of non-off course gear used for aerogenerator

The invention relates to a deviation driving device without a deviation gear for a wind driven generator. The invention relates to a deviation driving device. The invention solves the problems that the prior deviation driving device on the wind driven generator has more executive elements, poor reliability and low deviation accuracy, thereby bringing about the low power generation efficiency. A frequency conversion motor (21) is connected with a two-way constant delivery pump (23) through a coupling (22); a closed loop circuit (30) is formed between the two-way constant delivery pump (23) and a low speed great torque hydraulic motor (26); an oil replenishing valve assembly (24) is connected in parallel on the closed loop circuit (30) and is communicated with a closed oil can (20); a two-way hydraulic lock (25) is connected in series on the closed loop circuit (30); a manual stop valve (27) is communicated with high and low pressure cavities of the low speed great torque hydraulic motor (26) and the closed oil can (20); and motor rotor (26-1) on the low speed great torque hydraulic motor (26) is fixedly arranged on a deviation main shaft (40). The deviation driving device has the advantages of good reliability, simple structure, low cost, stepless deviation velocity regulation, and the like.