an m-type turbojet engine

Abstract

The invention relates to an M-type turbine jet engine. The M-type turbine jet engine comprises a vane disk arranged in the center of the M-type engine, a central bearing penetrating through the vane disk and outer cavities located at the two ends of the central bearing. The central bearing is the key bearing of the engine and is connected with other parts in a fixed or semi-fixed mode. The outer cavities include the first cavity and the second cavity, wherein the first outer cavity is located at an air outlet of the engine and used for isolating reverse air flow in a middle layer air passage and an outer layer air passage, and the second outer cavity is located at an air inlet of the engine and is a tail gas spraying pipe of the engine. The M-type turbine jet engine has the beneficial effects that a compressor vane disk and a turbine vane disk are combined into a simple and independent component, and a complex multi-level coaxial shaft structure is eliminated, so that the weight of the engine is reduced. According to the M-type turbine jet engine, the rotation speed relationship and pressure ratio among multiple levels of compressors can be better coordinated, the surge occurrence probability of the engine is reduced, the efficiency of the engine is improved, and oil consumption is reduced.

Description

technical field [0001] The invention belongs to an engine structure, in particular to an M-type turbojet engine. Background technique [0002] At present, major aero-engine companies in the world (referred to as "Aerofa") use different designs to improve engine efficiency, such as the unique three-shaft three-rotor engine technology of the British Rolls-Royce Company, which is added between the low-pressure and high-pressure compressors. The first-stage medium-pressure compressor coordinates the speed between the low-pressure and high-pressure compressors, increases the compression ratio, and reduces engine fuel consumption; while Pratt & Whitney of the United States has developed a dual-shaft three-rotor technology, using planetary gears to adjust low-pressure and high-pressure The speed between the compressors can basically reach the working efficiency of a three-shaft three-rotor engine. [0003] The above-mentioned Rolls-Royce and Pratt & Whitney have both developed goo...

AI Technical Summary

Problems solved by technology

[0003] The above-mentioned Rolls-Royce and Pratt & Whitney have both developed good technologies to improve the work efficiency of aviation engines. However, taking Rolls-Royce’s three-axis three-rotor aviation engine as an example, its concentric shaft structure is very complicated and difficult to assemble. The cost is high, and as Rolls-Royce's own technology, other aerospace companies need to invest a lot of money to develop the matching three-axis technology; Pratt & Whitney's two-axis three-rotor technology actually uses planetary The gear adjusts the speed of the compressor, and the structure is quite complicated. In addition, the planetary gear needs to bear a huge load during work, which is a test for the material of the gear, and the complex gear structure is not conducive to the maintenance of the engine in the future.

Images