Abstract: A spinning device for producing a yarn from a fiber material, a rotor spinning machine having at least one spinning device, and a method for preventing the accumulation of fibers inside a rotor housing of a spinning device. The spinning device has a rotor housing, a spinning rotor arranged inside the rotor housing and revolving at high speed during the spinning operation, and a rotor housing lid arranged on the rotor housing for opening and closing the rotor housing, wherein a device for generating at least one flow of sealing gas is also arranged, at least in portions, inside the rotor housing in a region of the rotor housing at the rear of the spinning rotor, in order to prevent fiber material and/or a loop of fibers getting behind the spinning rotor when the spinning rotor is braked and/or the rotor housing lid is opened.