Compressor stage

A compressor stage comprising:

• a stator-side intake connection piece (33) for introducing a medium to be compressed into the compressor stage;
• a rotor-side impeller (14);
• a stator-side inflow channel (11) for conveying the medium to be compressed in direction of the rotor-side impeller (14) proceeding from the intake connection piece, wherein the impeller (14) comprises a radially inner hub (16), a radially outer cover disk (17) and impeller blades (18) extending between the hub (16) and the cover disk (17);
• an annular gap (24) branching off from the inflow channel (11);
• a stator-side seal carrier (23) and a seal (22);
• a plus measuring point (31) and a minus measuring point (32) provided at the compressor stage for measuring the effective pressure at the compressor stage, the minus measuring point (32) positioned upstream of the impeller (14) outside of the stator-side inflow channel (11) in the annular gap (24);
• and
• wherein the annular gap (24) is bounded adjacent to the impeller (14) by the stator-side seal carrier (23) which carries the seal (22) that cooperates with the cover disk (17) of the rotor-side impeller (14),
• wherein the annular gap (24) branches off radially outward from the stator-side inflow channel (11) immediately upstream of the impeller (14).

A compressor stage comprising:

• a stator-side intake connection piece (33) for introducing a medium to be compressed into the compressor stage;
• a rotor-side impeller (14);
• a stator-side inflow channel (11) for conveying the medium to be compressed in direction of the rotor-side impeller (14) proceeding from the intake connection piece, wherein the impeller (14) comprises a radially inner hub (16), a radially outer cover disk (17) and impeller blades (18) extending between the hub (16) and the cover disk (17);
• an annular gap (24) branching off from the inflow channel (11);
• a stator-side seal carrier (23) and a seal (22);
• a plus measuring point (31) and a minus measuring point (32) provided at the compressor stage for measuring the effective pressure at the compressor stage, the minus measuring point (32) positioned upstream of the impeller (14) outside of the stator-side inflow channel (11) in the annular gap (24);
• and
• wherein the annular gap (24) is bounded adjacent to the impeller (14) by the stator-side seal carrier (23) which carries the seal (22) that cooperates with the cover disk (17) of the rotor-side impeller (14) and opposite the impeller (14) by a stator-side housing (13),
• wherein the annular gap (24) is bounded opposite the impeller (14) by a stator-side inlet star (27) which is fastened to the stator-side housing (13).