Tandem type active and passive hybrid vibration isolator capable of keeping air gap distance of electromagnetic vibration exciter

The invention discloses a tandem type active and passive hybrid vibration isolator capable of keeping the air gap distance of an electromagnetic vibration exciter, which comprises a control force output main air bag, the electromagnetic vibration exciter arranged in the control force output main air bag and a height adjusting auxiliary air bag, and the control force output main air bag is connected with the height adjusting auxiliary air bag in series through a movable cover plate. On the premise that passive vibration isolation performance and active control force output performance are not affected, by means of the characteristic that air pressure in the air bags is adjustable, the auxiliary air bags connected in series and a pressure adjusting scheme are designed, and the air gap distance between an armature and an iron core of the internal vibration exciter is kept; therefore, the active and passive hybrid vibration isolator can be applied to a scene in which the mounting distance is greatly changed in re