Injection device of exhaust volute of marine gas turbine

Abstract

The invention discloses an injection device for an exhaust volute of a marine gas turbine. A plurality of stages of nozzles which are annularly sleeved from inside to outside and can adjust the injection area are designed in the device, one stage of lobe nozzle at the center is communicated and connected with a pipe orifice of a square-to-circle inner spray pipe, and the remaining three lobe nozzles are movably sleeved outside the pipe orifice in a height-adjustable manner. According to the design, the problem of box-packed body injection cooling caused by different flue gas speeds of the marine gas turbine under different working conditions is solved, and the utilization efficiency of flue gas energy of the gas turbine under different working conditions is improved; the pressure loss of exhaust under different working conditions is effectively reduced while the injection capacity of the gas turbine under different working conditions is ensured; and meanwhile, the temperature in a gas turbine module under different working conditions can be well controlled.

Description

technical field [0001] The invention belongs to the technical field of marine gas turbines, and in particular relates to an environment control device for a marine gas turbine box, in particular to an ejector device for an exhaust volute of a marine gas turbine. Background technique [0002] The structure and aerodynamic performance of marine gas turbine exhaust ejector is an important research direction of gas turbine installation technology. When the gas turbine is running, the working temperature is high, and the heat dissipation on the surface of the combustion chamber is large. Therefore, when the gas turbine operates in a closed box, the combustion chamber releases heat through surface radiation and convective heat exchange on the one hand, and high-temperature gas leaks at the flange connection, which makes the inner surface temperature of the box and the box The temperature of the air in the body rises sharply, which in turn makes the temperature of the electrical c...

AI Technical Summary

Problems solved by technology

If the amount of injection is too large, the structural size of the intake pipe will be too large, which is not conducive to the structural arrangement of the boxed body in the engine room

If the ejection amount is too small, it indicates that the ejector ejection capacity is insufficient, resulting in excessive temperature on the surface of the box body and internal accessories, which in turn leads to gas turbine operation failure

Therefore, the ejection cooling device disclosed in the prior art has the defect that the ejection capability cannot be adjusted

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