Contact-seal inverted type gas wave refrigerating machine

The invention relates to a contact-seal inverted type gas wave refrigerating machine, and belongs to the technical field of pressure gas expansion refrigeration. According to the gas wave refrigerating machine, mechanical seals with good sealing performance are applied to a refrigerating machine, the inner-flow balanced-type double-end-face mechanical seal is located between an intake pipe of an upper machine body and an exhaust pipe of a main machine body, the long-narrow-type single-end-face mechanical seal is arranged at the position, underneath an upper embedded bearing box, in an upper transition box base, and the thin-ladder-type single-end-face mechanical seal is arranged at the position, above a lower embedded bearing box, in the middle of the main machine body. Cooling and lubricating systems are all of a combined structure, so that the complexity, trouble and waste caused by repeated arrangements are reduced, and the reliable work of bearings and the sealing devices is guaranteed. The mechanical seals have the advantages of being good in sealing performance, small in leakage amount, high in vibration resistance, long in service life and the like, so that the defect that the adiabatic efficiency of the refrigerating machine is affected seriously due to the internal leakage of the pressure gas is effectively overcome, and the refrigerating efficiency can be enhanced by more than 10 percent. The inverted type structure is simple, the gas wave refrigerating machine is convenient to disassemble and assemble, labor intensity is relieved, and meanwhile crucial hidden hazards can be reduced.