Radial flow type rotating mechanical impeller

Abstract

The invention discloses a radial flow type rotating mechanical impeller. The radial flow type rotating mechanical impeller comprises an impeller body, and a plurality of main blades and a plurality ofedge blades are arranged on the back surface of the impeller body. The main blades are uniformly distributed on the back surface of the impeller body in the peripheral direction of the impeller body,and the main blades are arranged in a protruding mode. The edge blades are uniformly arranged between the inlet sections of the adjacent main blades in the peripheral direction, and the edge blades are arranged in a protruding mode. According to the radial flow type rotating mechanical impeller, the blade consistency in an area with a larger radius on the back portion of the impeller body is significantly increased, meanwhile, the increase of the blade consistency of an area with a smaller radius is avoided, so that the circumferential velocity increases rapidly after leakage fluid enters a back clearance of the impeller body, the circumferential velocity of the leakage fluid further increases with the decrease of the radius under the drive of the blades on the back portion of the impeller body, the pressure is reduced at the same time, the reduction of fluid pressure in the area with the larger radius facilitates the reduction of the axial force on the back portion of the impeller body, and the axial force of the impeller body is balanced.

Description

technical field [0001] The invention relates to the technical field of radial-flow rotary mechanical impellers, in particular to a radial-flow rotary mechanical impeller. Background technique [0002] Due to its compact size and excellent variable working conditions, radial-flow rotating machinery is widely used in various fields of national production, such as centrifugal pumps in the petrochemical industry, turbochargers in the automotive industry, centrifugal compressors and centripetal turbines in the aviation industry, etc. During its operation, the axial thrust of the fluid on the back of the impeller is usually greater than that on the front of the impeller. When the operating pressure of the rotating machine is high, the impeller bears a large axial force directed to the front of the impeller, which may exceed the bearing capacity of the thrust bearing. Design some special structures such as balance holes, back vanes, etc. to balance the axial force. [0003] The im...

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is the problem of high power loss in the axial force balance structure of the existing radial flow rotating machinery impeller

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