| abstract |
The invention belongs to the technical field of compressors, and in particular relates to an integral structure of a centrifugal impeller with a grate seal and a casing. It includes a guide casing, a grate, a diffuser, a casing and a centrifugal impeller. The centrifugal impeller is installed in the inner cavity of the casing. The centrifugal impeller includes a wheel disc and blades distributed on the front surface of the wheel disc. The blades have outer sides of the blades. The centrifugal impeller and the casing are integrally formed, and the outer edge of the blade is at least partially attached to the inner wall of the casing. Compared with the prior art, the present invention can reduce tip leakage flow, aerodynamic energy loss and distorted flow. The diffuser has a spaced diffuser front end wall and a diffuser rear end wall; a gap is formed between the guide casing and the front end of the housing; a gap is formed between the rear end of the housing and the front end wall of the diffuser, and two gaps are formed. It is sealed by two grate parts respectively. |