Hydraulic unit, method for operating a hydraulic unit, and steering system

A steering system for an axle, comprising:

• at least two steering arms;
• at least two hydraulic cylinders, the two hydraulic cylinders (27a, 27b) are connected by way of in each case a same cylinder side to the axle and in each case by way of an other cylinder side to in each case one of the two steering arms, an annular space (6a, 6a, 28a, 28b) of the first hydraulic cylinder (27a, 27b) arranged in order to communicate via at least one hydraulic line (7, 8, 30, 31) with an identical second annular space (6a, 6a, 28a, 28b) of the second hydraulic cylinder (27a, 27b), and a piston space (5a, 5b, 29a, 29b) of the first hydraulic cylinder (27a, 27b) arranged in order to communicate via at least one second hydraulic line (7, 8, 30, 31) with an identical second piston space (5a, 5b, 29a, 29b) of the second hydraulic cylinder (27a, 27b) such that as the annular space of the first hydraulic cylinder compresses the second annular space is expanded with hydraulic fluid from the at least one hydraulic line, and as the second piston space compresses the piston space of the first hydraulic cylinder is expanded with hydraulic fluid from the at least one second hydraulic line,
• a hydraulic pump (9, 10, 32, 33) is arranged at least in the at least one hydraulic line (7, 8, 30, 31) between the two annular spaces (6a, 6a, 28a, 28b) or in the at least one second hydraulic line between the two piston spaces (5a, 5b, 29a, 29b), and
• at least one second hydraulic pump (9, 10, 32, 33), one of the hydraulic pumps (9, 10, 32, 33) being arranged in the at least one hydraulic line (7, 8, 30, 31) between the two annular spaces (6a, 6a, 28a, 28b), and one of the hydraulic pumps (9, 10, 32, 33) being arranged in the at least one second hydraulic line (7, 8, 30, 31) between the two piston spaces (5a, 5b, 29a, 29b).