Cooling assembly for turbine outer ring

Abstract

A cooling assembly for a turbine outer ring comprises a turbine box, a suspension connection piece, an outer ring and an impact plate. An air inlet hole and a throttling air outlet hole which are connected with an air source are defined in the suspension connection piece. The suspension connection piece is coupled onto the turbine box to form a first cavity with the turbine box. The outer ring is coupled to the suspension connection piece and forms a second cavity with the suspension connection piece. A plurality of impact holes are defined in the impact plate, the impact plate is connected onto the outer ring in the second cavity to divide the second cavity into a second outer cavity and a second inner cavity, and a plurality of winding channels are defined by the outer ring. Therefore, air flow from the air source enters the first cavity through the air inlet hole, enters the second outer cavity through the throttling air outlet hole, then enters the second inner cavity from the impact holes in the impact plate to impact the outer ring and finally flows out from the plurality of winding channels of the outer ring to form a cooling air film. The winding channels are favorable for improving a heat exchange effect of the cooling air flow in a base body of the outer ring.

Description

technical field [0001] The invention relates to a cooling assembly, in particular to a cooling assembly of a turbine outer ring. Background technique [0002] As a high-temperature and high-speed rotating part of a gas turbine, its performance directly affects the working efficiency of the engine. In order to better improve the efficiency of the turbine, it is technically required to increase the temperature of the gas working medium, which puts forward more requirements for the cooling technology of the turbine parts. high demands. The outer ring of the turbine is the part that cooperates with the turbine blades in the mainstream channel. The working environment temperature is generally above 1300K. The high temperature resistance of the material alone cannot withstand the high temperature and harsh environment for a long time. In order to ensure the safe and reliable long-term operation of the outer ring, it is necessary to effectively cool the outer ring of the turbine. ...

AI Technical Summary

Problems solved by technology

Among the existing published patents, U.S. Patent US.5,169,287 adopts the combined cooling technology of impingement cooling and outlet air film exhaust, and the channel and shape of the air film holes are single; European patent EP1176285A2 adopts the cooling technology of porous air intake and air film hole exhaust

Among the above two technologies, there are fewer types of cooling methods used in combination, and the maximum and effective distribution and utilization of the airflow cannot be achieved.

In addition, none of the above patents mentioned the problem of wear protection of the outer ring

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