Two-stage radial compressor with compensating bodies for compensating a change in length occurring upon a change in temperature

A two-stage radial compressor with a housing and a rotor supported within the housing that has a first impeller, a second impeller and a shaft having a respective one of the two impellers fixed to the opposing end portions thereof,

• wherein the rotor has a first thermal expansion coefficient causing a change in length of the rotor upon a change in temperature,
• wherein the housing has a second thermal expansion coefficient different from the first thermal expansion coefficient and causing a change in length of the housing different from the change in length of the rotor upon the change in temperature, and
• wherein at least two compensating bodies extending parallel to the shaft are arranged in or on the housing, the at least two compensating bodies having a third thermal expansion coefficient and are configured to cause, upon the change in temperature and/or predetermined differing temperatures of the rotor and housing, a predetermined change in length of the housing and adjust the change in length of the housing to the change in length of the rotor, such that the change in length of the housing corresponds to the change in length of the rotor upon the change in temperature.