Cyclone with adjustable throat area

Abstract

The invention relates to a cyclone with an adjustable throat area. The cyclone is assembled on a flame tube of a combustion chamber and comprises an annular front wall, an annular rear wall, a plurality of blades, a gear ring and a plurality of gears, wherein the blades are arranged between the front wall and the rear wall and provided with rotating shafts protruding out of the two sides of bladebodies, and the rotating shafts penetrate through first through holes and second through holes to be connected with the front wall and the rear wall in a relatively rotating mode; the gear ring is provided with strip-shaped holes extending in the circumferential direction, the strip-shaped holes and studs are mounted in a matched mode, and the gear ring and the front wall are connected in a relatively rotating mode; and the gears are provided with transmission holes, the transmission holes are used for being connected with transmission shafts, the gears are mounted on the gear ring in a matched mode, and when the gear ring rotates relative to the front wall, the gears can drive the blades to deflect. According to the cyclone, the angle of the blades can be adjusted in a stepless mode, andtherefore the throat area and the number of rotational flow can be adjusted in a stepless mode.

Description

technical field [0001] The application belongs to the technical field of aero-engine structural design, in particular to a swirler with adjustable throat area. Background technique [0002] The swirler is an important part in the combustion chamber of an aero-engine. It is installed at the head of the flame tube to generate a rotational velocity for the incoming air, thereby forming a recirculation zone in the flame tube to improve combustion stability. [0003] Usually, the swirler is cast or machined, and its blades are integrated with the front and rear walls or welded, and the throat area is fixed and cannot be adjusted. However, in the initial stage of the development of the combustion chamber, it is generally necessary to carry out type selection tests on swirlers with different throat areas. The traditional method is to process multiple swirlers for separate tests. On the one hand, the production cost is high, and on the other hand, the production cycle is short. The...

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Problems solved by technology

However, in the initial stage of the development of the combustion chamber, it is generally necessary to carry out type selection tests on swirlers with different throat areas. The traditional method is to process multiple swirlers for separate tests. On the one hand, the production cost is high, and on the other hand, the production cycle is short. Longer, and the most important thing is that the throat area of ​​the swirler cannot be infinitely adjusted, and there is a risk of not finding the best throat area in the test, which brings certain difficulties to the initial development and testing of the combustion chamber

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