Patent ID: 8956128
Filing Date: 2015-02-17
Classification: F04B,F04C

Abstract:
1. A spherical expansion compressor adapted to variable working conditions and having a spherical inner chamber, characterized in that, the spherical expansion compressor comprises: a rolling rotor compressor used as a first-stage compression, with an exhaust valve arranged at an outlet port thereof and a pressure-controlled inlet valve mounted at an inlet port thereof, wherein the rolling rotor compressor comprises a rotor and a rotor cylinder, the rotor of the rolling rotor compressor being of an eccentric structure arranged on a main shaft, and the rotor cylinder of the rolling rotor compressor being positioned between said cylinder and a main shaft support which supports the main shaft; compression working chambers used as a second-stage compression and arranged in the spherical inner chamber; expansion working chambers used as at least one-stage expansion arranged in the spherical inner chamber; a gas tank, with its inlet port in communication with the exhaust valve of the rolling rotor compressor and its outlet port in communication with an inlet port of the second-stage compression of the spherical expansion compressor, for supplying gas sources of constant pressure for the gas suction of the second-stage compression of the spherical expansion compressor; and a pressure control circuit arranged between the gas tank and the pressure-controlled inlet valve, for controlling the pressure-controlled inlet valve to open/close according to the pressure in the gas tank; wherein when the pressure in the gas tank exceeds a set value, the pressure-controlled inlet valve is closed by the pressure control circuit, and when the pressure in the gas tank returns to the set value, the pressure-controlled inlet valve is opened and the rolling rotor compressor works normally; a working medium after the first-stage compression enters the gas tank, and the pressure in the tank is maintained constant through regulation by the pressure control circuit; after entering the second-stage compression, the working medium of constant pressure is expanded at an expansion stage, thereby forming the spherical expansion compressor adapted to variable working conditions.