Wind generating set and hydraulic pump aggregate thereof

The invention discloses a hydraulic pump aggregate, which comprises a front end cap (1), a rear end cap (2), a piston cylinder and a rotating shaft (3). The rotating shaft comprises a symmetric shaft (31) and at least two eccentric shafts (32), the eccentric shafts (32) are axially arrayed along the symmetric shaft (31), projections of the eccentric shafts (32) in a radial plane of the symmetric shaft (31) are peripherally distributed uniformly, a group of plunger cavities (41) is formed in an inner cavity of the piston cylinder relative to each eccentric shaft (32), a plunger component capable of reciprocating is arranged in each plunger cavity (41), the other ends of the plunger components are attached on the outsides of the eccentric shafts (32), and the plunger components can rotate relatively. On the one hand, parts can be universal in different power modes due to the proper structural design of the hydraulic pump aggregate, so that modular production is realized, and on the other hand, power shunt can be easily realized.