Equalization device, in particular in the form of a tank

A equalization device, comprising:

• a tank housing having housing walls with an inlet for filling fluid in the tank housing, with an outlet for discharging the fluid from the tank housing and with a pressure-equalizing connection in fluid communication with an environment outside the tank housing and attached to an upper housing wall of the tank housing, the tank housing forming a closed container for the fluid in the housing except for passages of the inlet, the outlet and the pressure-equalizing connection;
• an equalization body disposed inside the tank housing and rigidly mounted to the upper housing wall, the equalization body having an elastically flexible separating wall delimiting an internal space of the equalization body, the internal space being connected continuously in fluid communication with the pressure-equalization connection and thereby to the environment, the separating wall being a flexible accumulator bladder of elastomeric material, the internal space being at least partially filled with foam material;
• and
• a protective housing fixedly rigidly mounted in the tank housing at an upper end of the protective housing to the upper housing wall under the pressure-equalizing connection by a mounting bracket, the equalization body being disposed in the protective housing, the protective housing protecting the equalization body from pressure pulsation and pressure shocks and having a passage passing therethrough;
• whereby an oscillating volume of the fluid in the tank housing or a volume increase due to a temperature increase of the fluid in the tank housing deforms the separating wall of the equalization body corresponding to displacement volumes in the fluid in the tank housing.