Pressure pockets on the hollow wheel

A rotary pump for delivering a fluid, the rotary pump comprising:

• 1.1 a housing featuring a delivery space which the housing surrounds and axially delineates on the end sides and which comprises an inlet for the fluid on a low-pressure side of the rotary pump and an outlet for the fluid on a high-pressure side of the rotary pump;
• 1.2 an inner rotor which can be rotated in the delivery space;
• 1.3 an outer rotor which can be rotated about a pump rotational axis in the delivery space and which forms delivery cells with the inner rotor;
• and
• 1.4 a circumferential bearing wall which is formed by the housing or arranged in the housing and which surrounds the outer rotor and mounts it, such that it can be rotated about the pump rotational axis, in a radial sliding contact,
• 1.5 wherein the circumferential bearing wall comprises multiple blind pockets which are radially open towards the outer rotor and/or the outer rotor comprises multiple blind pockets which are radially open towards the circumferential bearing wall, wherein the blind pockets are fluidically separated from each other in the region of the sliding contact between the outer rotor and the circumferential bearing wall.