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CN-122014414-A - Flow distribution ring anti-icing structure and engine

CN122014414ACN 122014414 ACN122014414 ACN 122014414ACN-122014414-A

Abstract

The invention provides a split ring anti-icing structure and an engine, wherein the split ring anti-icing structure comprises a split ring, a casing, a stator blade, a bleed pipe assembly, a heat-insulating layer, a thermal barrier coating and a heat-insulating layer, wherein the casing and the split ring form a heating cavity and an exhaust slot communicated with the heating cavity, the stator blade is connected with the casing, the bleed pipe assembly is communicated with the heating cavity and is used for introducing high-temperature bleed air into the heating cavity so as to enable the high-temperature bleed air to be blown to the front edge of the blade top of the stator blade through the exhaust slot, and the thermal barrier coating is coated on the stator blade. The thermal barrier coating is arranged on the first aspect, the stator blade and the high-temperature air entraining are separated, so that the high-temperature air entraining is prevented from icing the stator blade, meanwhile, the high-temperature air entraining and the stator blade are prevented from carrying out heat exchange, uneven heating of the stator blade is further avoided, the local temperature difference is prevented from being too large, and therefore the thermal stress of the stator blade is greatly reduced.

Inventors

  • SUN HUIMIN
  • LIU RUJUN
  • Xiong Xiaoteng
  • YANG CHENYUN

Assignees

  • 中国航发商用航空发动机有限责任公司

Dates

Publication Date
20260512
Application Date
20241111

Claims (9)

  1. 1. A diverter ring anti-icing structure comprising: The split-flow type heating device comprises a split-flow ring (100) and a casing (200), wherein the casing (200) and the split-flow ring (100) enclose a heating cavity (300) and an exhaust slot (310) communicated with the heating cavity (300); A stator blade (400) connected to the casing (200); A bleed air pipe assembly (500) communicated with the heating cavity (300), wherein the bleed air pipe assembly (500) is used for introducing high-temperature bleed air into the heating cavity (300) so as to blow the high-temperature bleed air to the front edge of the blade tip of the stator blade (400) through the exhaust slot (310); A thermal barrier coating (600) applied to the stator blade (400).
  2. 2. The split ring anti-icing structure according to claim 1, characterized in that a flange (210) is provided at an end of the casing (200) facing the heating chamber (300), the flange (210) divides the heating chamber (300) into a front chamber (320) and a rear chamber (330), and an impact hole (211) is provided on the flange (210); the bleed air pipe assembly (500), the rear cavity (330), the impingement hole (211), the front cavity (320) and the exhaust slot (310) are communicated in sequence.
  3. 3. The split ring anti-icing structure according to claim 2, characterized in that said casing (200) is provided with an exhaust hole (220), said exhaust hole (220) being in communication with said rear cavity (330) and being located between said exhaust slot (310) and said stator blade (400).
  4. 4. A split ring anti-icing structure according to claim 3, characterized in that a plurality of said air discharge holes (220) are provided along the circumferential direction of said casing (200).
  5. 5. The splitter ring anti-icing structure according to claim 1, characterized in that the vent slot (310) is provided with a chamfer (311) towards the slot of one side of the stator blade (400), the chamfer (311) being located on the side of the slot close to the stator blade (400), The high temperature bleed air can be blown along the chamfer (311) to the stator blade (400).
  6. 6. The shunt ring anti-icing structure according to any of claims 1-5, characterized in that said thermal barrier coating (600) is a space adiabatic reflective porcelain layer.
  7. 7. The diverter ring anti-icing structure according to any of claims 1-5, characterized in that the stator blade (400) is an aluminium based composite.
  8. 8. The splitter ring anti-icing structure according to any of claims 1-5, characterized in that the bleed air pipe assembly (500) comprises a total distribution pipe (510), a circumferential collar (520) and a plurality of bleed air pipes (530) which are communicated in sequence, the bleed air pipes (530) being mounted to the casing (200) and being communicated with the heating chamber (300), The main distribution pipe (510) is used for introducing high-temperature air into the heating cavity (300) through the circumferential ring pipe (520) and the plurality of air introducing pipes (530) in sequence.
  9. 9. An engine comprising the split ring anti-icing structure of any one of claims 1 to 8.

Description

Flow distribution ring anti-icing structure and engine Technical Field The invention relates to the field of aero-engines, in particular to a diverter ring anti-icing structure and an engine. Background An axial-flow impeller-mechanical compressor with a large bypass ratio turbofan aeroengine is typically composed of a fan booster stage and a high-pressure compressor, wherein the fan booster stage comprises an inlet fan, a booster stage and an intermediate unit body. The flow dividing ring is positioned in front of the supercharging zero-order stator blade and divides the gas into an inner culvert and an outer culvert. In order to prevent the diverter ring and the stator blades from icing in the working state, high-temperature and high-pressure gas is led to the diverter ring heating cavity to impact the diverter ring and the most easily icing parts of the stator blades to achieve the anti-icing effect. However, in the related art, the air flow of the high-temperature bleed air is blown to the local position of the surface of the stator blade, so that the surface of the blade is heated unevenly, and further, the blade is subjected to larger thermal stress, and the service life of the blade is influenced. Disclosure of Invention The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a splitter ring anti-icing structure and an engine capable of preventing uneven heating of a blade surface. The application discloses a split ring anti-icing structure which comprises a split ring, a casing, a stator blade, a bleed air pipe assembly, a thermal barrier coating and a thermal barrier coating, wherein the split ring and the casing are surrounded to form a heating cavity and an exhaust slot communicated with the heating cavity, the stator blade is connected with the casing, the bleed air pipe assembly is communicated with the heating cavity and is used for introducing high-temperature bleed air into the heating cavity so that the high-temperature bleed air is blown to the front edge of the top of the stator blade through the exhaust slot, and the thermal barrier coating is coated on the stator blade. The thermal barrier coating is arranged on the first aspect, the stator blade and the high-temperature air entraining are separated, so that the high-temperature air entraining is prevented from icing the stator blade, meanwhile, the high-temperature air entraining and the stator blade are prevented from carrying out heat exchange, uneven heating of the stator blade is further avoided, the local temperature difference is prevented from being too large, and therefore the thermal stress of the stator blade is greatly reduced. Optionally, a flange is arranged at one end of the casing facing the heating cavity, the heating cavity is divided into a front cavity and a rear cavity by the flange, an impact hole is arranged on the flange, and the air entraining pipe assembly, the rear cavity, the impact hole, the front cavity and the exhaust slot are sequentially communicated. Therefore, the high-temperature air entraining can be impacted to the forefront end of the flow distribution ring more accurately, and the anti-icing efficiency of the flow distribution ring is improved. Optionally, the casing is provided with an exhaust hole, and the exhaust hole is communicated with the rear cavity and is positioned between the exhaust slot and the stator blade. In this way, the exhaust slot can be matched with the exhaust hole, specifically, the high-temperature air flow output by the exhaust slot can be directly blown to the stator blade to prevent ice, low-temperature air blown into the engine through the fan disc can be heated, and the high-temperature air bleed output by the exhaust hole can be more specifically blown to the stator blade to prevent ice, so that the anti-icing efficiency of the stator blade is improved. Optionally, the exhaust hole is provided with a plurality of holes along the circumference of the casing, so that a plurality of stator blades arranged on the casing obtain better cooling effect. Optionally, the exhaust slot is provided with a chamfer face towards a slot on one side of the stator blade, the chamfer face is positioned on one side of the slot close to the stator blade, and the high-temperature bleed air can be blown to the stator blade along the chamfer face. In the second aspect, the position of the blade top of the stator blade and the junction of the casing are easier to freeze, and high-temperature air flow can be more effectively guided to the region of the blade top of the stator blade through the chamfer surface so as to prevent the position of the blade top of the stator blade and the junction of the casing from icing, thereby improving the anti-icing efficiency. In the second aspect, the position of the blade top of the stator blade and the junction of the casing are easier to freeze, and high-temperature air flow can be mor