Pre-swirl cooling system based on shrinkage type receiving hole structure

The invention discloses a pre-swirl cooling system based on a shrinkage type receiving hole structure. According to the pre-swirl cooling system, an air flow path comprises an air inlet cavity, pre-swirl nozzles, a rotator-stator cavity, receiving holes, a co-rotating disc cavity and air supply holes which communicate with one another in sequence; the multiple receiving holes are uniformly formedin a cover plate of the rotator-stator cavity in the circumferential direction of the cover plate; after airflow flows into the co-rotating disc cavity from the rotator-stator cavity through the multiple receiving holes, turbine blades are cooled through the air supply holes; and the cross section of the receiving holes is gradually reduced from the end close to the rotator-stator cavity to the end close to the co-rotating disc cavity. Compared with traditional receiving holes, the pre-swirl cooling system has the advantages that the airflow speed of the receiving holes can be decreased, the pressure loss of the airfl