An angle-adjustable air-bleed anti-icing device

Abstract

The present application aims to provide an angle-adjustable air induction anti-icing device, comprising an air induction anti-icing unit, the air induction anti-icing unit comprising an air induction anti-icing branch pipe, a movable connecting rod, a connecting rod fixing support connected behind the air induction anti-icing branch pipe, the connecting rod fixing support being connected with the movable connecting rod through a fixing bolt, an air induction anti-icing nozzle being arranged in front of the air induction anti-icing branch pipe, the air induction anti-icing nozzle being communicated with the air induction anti-icing branch pipe, an upper limiting sleeve and a lower limiting sleeve being respectively arranged in the air induction anti-icing branch pipe, the upper limiting sleeve being located above the lower limiting sleeve. The present application realizes the expansion of the two side walls and the lateral spraying range in the air inlet, realizes the anti-icing efficiency of a larger anti-icing area, effectively guarantees the local anti-icing effect under the premise of not increasing the resistance loss of the air inlet, and guarantees the safe and stable operation of the gas turbine.

Description

Technical Field

[0001] The present invention relates to a gas turbine intake device, specifically an bleed air anti-icing device. Background Technology

[0002] Gas turbines are widely used in marine, aviation, power generation, and gas pipeline industries due to their advantages such as high single-unit power, high power density, and high reliability. Marine gas turbines, however, are prone to icing in their intake ducts due to their long distances, complex structures, and operation in high-salt-spray, humid, and cold air environments. Icing in the intake system often occurs on the surface of the intake filter, potentially leading to blockage. If not addressed promptly, this can reduce the intake airflow, affecting the gas turbine's efficiency and, in severe cases, disrupting its normal operation. For ships to operate in polar and extreme marine environments, they must possess the fundamental capability for efficient and stable operation in harsh marine conditions.

[0003] Currently, the commonly used anti-icing measures involve drawing high-temperature, high-pressure gas from the compressor to the intake to heat and humidify the airflow for anti-icing. The structure used is usually a fixed intake pipe and intake channel, and the nozzle direction can only mix the airflow in a fixed direction. Although the intake nozzle can heat the local area of ​​the main flow, it cannot achieve multi-angle, controllable directional de-icing. Summary of the Invention

[0004] The purpose of this invention is to provide an adjustable-angle air-induced ice-induced ice device that can overcome the technical defects of existing imported ship anti-icing devices.

[0005] The objective of this invention is achieved as follows:

[0006] This invention discloses an adjustable-angle air-induced anti-icing device, characterized in that it includes an air-induced anti-icing unit, which comprises an air-induced anti-icing branch pipe and a movable connecting rod. A connecting rod fixing bracket is connected to the rear of the air-induced anti-icing branch pipe, and the connecting rod fixing bracket is connected to the movable connecting rod through a fixing pin. An air-induced anti-icing nozzle is provided in front of the air-induced anti-icing branch pipe and communicates with the air-induced anti-icing branch pipe. An upper limit sleeve and a lower limit sleeve are respectively provided in the air-induced anti-icing branch pipe, with the upper limit sleeve located above the lower limit sleeve.

[0007] The present invention may also include:

[0008] 1. The bleed air anti-icing branch pipe is equipped with an upper limit boss that limits the position of the upper limit sleeve and a lower limit boss that limits the position of the lower limit sleeve.

[0009] 2. The upper limit sleeve and the lower limit sleeve are threaded to connect with the bleed air anti-icing branch pipe by rotation.

[0010] 3. The movable connecting rod and the air-induced anti-icing branch pipe are driven to rotate by the fixed pin, and the rotation angle θ varies from -45° to 45°.

[0011] 4. The outer diameter Dp of the induced draft anti-icing nozzle ranges from 16mm to 20mm, and the wall thickness of the induced draft anti-icing nozzle is δ.

[0012] 5. The outer diameter of the induced air anti-icing branch pipe is Dn and the wall thickness is 2δ; the outer diameter of the upper limit sleeve and the lower limit sleeve is Dn-4δ and the wall thickness is δ; the connecting rod fixing bracket is a square metal strip with a width and height of 2δ, which is welded to the induced air anti-icing branch pipe. The welding position is at the intersection of the center line of the induced air anti-icing nozzle and the opposite side surface of the induced air anti-icing branch pipe.

[0013] 6. The air-drawing anti-icing unit comprises four units, arranged in parallel.

[0014] The advantages of this invention are as follows: Through structural design, this invention addresses the need for directional hot gas injection for marine bleed air anti-icing to achieve comprehensive de-icing. While ensuring both sealing and safety, it designs a nested rotating structure for the traditional bleed air anti-icing nozzle section and a connecting rod structure with movable pins at the rear end. This expands the range of injection on both sides of the air intake duct and the lateral spray area, achieving greater anti-icing efficiency over a larger anti-icing area. Without increasing the resistance loss of the air intake duct, it effectively ensures local anti-icing effect and safe and stable operation of the gas turbine. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the air intake anti-icing unit;

[0017] Figure 3 This is a schematic diagram, viewed from above, showing how adjusting the movable connecting rod rotates the bleed air anti-icing branch pipe, which is equipped with a connecting rod fixing bracket. Detailed Implementation

[0018] The invention will now be described in more detail with reference to the accompanying drawings:

[0019] Combination Figure 1-3 The present invention provides an adjustable-angle air-induced anti-icing device, which consists of an air-induced anti-icing unit 1, a fixed pin 2, and a movable connecting rod 4. The air-induced anti-icing unit 1 consists of an upper limit sleeve 3, a lower limit sleeve 7, an air-induced anti-icing branch pipe 8, an air-induced anti-icing nozzle 6, and a connecting rod fixing bracket 5. An upper limit boss 9 and a lower limit boss 10 are designed in the air-induced anti-icing branch pipe 8.

[0020] The air-induced anti-icing pipeline branch pipe is an assembled rotatable cylindrical pipe. It is made of 316L stainless steel with a pressure resistance of 2.0MPa as the air-induced anti-icing branch pipe 8 and air-induced anti-icing nozzle 6. The internal design includes an upper limit boss 9 and a lower limit boss 10.

[0021] The upper limit sleeve 3 and the lower limit sleeve 7 are made of 316L stainless steel with a pressure resistance of 2.0MPa, and are connected to the air venting and anti-icing branch pipe 8 by means of threads, which can realize the rotation function.

[0022] Figure 1 The assembly diagram of the adjustable-angle air-induced anti-icing device shown illustrates n air-induced anti-icing units 1 connected by a movable link 4. These units include n upper limit sleeves 3 and n lower limit sleeves 7, as well as n link fixing brackets 5 and air-induced anti-icing nozzles 6 mounted on the air-induced anti-icing branch pipe 8. The link fixing brackets 5 of these n air-induced anti-icing units 1 have pin holes and are connected to the movable link 4 by fixing pins 2.

[0023] Figure 2 In the air-induced anti-icing unit 1 shown, the upper limit sleeve 3 and the lower limit sleeve 7 are threaded and connected to the air-induced anti-icing branch pipe 8 by rotation. The upper limit sleeve 3 can be screwed up to the upper limit boss 9, and the lower limit sleeve 7 can be screwed up to the lower limit boss 10. The air-induced anti-icing nozzle 6 and the connecting rod fixing bracket 5 are welded to the air-induced anti-icing branch pipe 8. The connecting rod fixing bracket 5 has a pin hole for connection with the fixing pin 2 and the movable connecting rod 4.

[0024] Figure 3 From a top-down view, the adjustable-angle air-induced anti-icing device allows the air-induced anti-icing branch pipe 8, which is equipped with a connecting rod fixing bracket 5, to rotate by adjusting the movable connecting rod 4. The rotation angle θ can vary from -45° to 45° depending on the project requirements, and θ determines the outlet direction of the hot air nozzle. The outer diameter of the air-induced anti-icing nozzle 6 is Dp, which varies from 16mm to 20mm, and from 500mm to 850mm as Dp increases. The size of Dp affects the injection distance for hot air heating, and the wall thickness is δ. The distance from the air outlet end of the anti-icing nozzle 6 to the induced air anti-icing branch pipe 8 is H. The outer diameter of the induced air anti-icing branch pipe 8 is Dn, and the wall thickness is 2δ. The outer diameter and wall thickness of the upper limit sleeve 3 and the lower limit sleeve 7 are the same, with an outer diameter of (Dn-4δ) and a wall thickness of δ. The connecting rod fixing bracket 5 is a square metal strip with a length of S and a width and height of 2δ, which is welded to the induced air anti-icing branch pipe 8. The welding position is at the intersection of the center line of the induced air anti-icing nozzle 6 and the opposite side surface of the induced air anti-icing branch pipe 8. The distance between the centers of two adjacent induced air anti-icing branch pipes 8 is L.

[0025] The hot gas flows through the induced draft anti-icing branch pipe 8 and is then ejected from the induced draft anti-icing nozzle 6 to achieve the anti-icing function. The direction of the induced draft anti-icing nozzle 6 can be changed by rotating the connecting rod fixing bracket 5 to move the induced draft anti-icing branch pipe 8. Due to the connection of the movable connecting rod 4, the angle of change of the hot gas injection direction in all induced draft anti-icing units 1 of the induced draft anti-icing device is consistent, allowing for flexible adjustment of the hot gas coverage area and dynamic increase in the hot gas injection range. The threaded rotation of the upper limit sleeve 3 and the lower limit sleeve 7 onto the induced draft anti-icing branch pipe 8 achieves the sealing of the high-temperature, high-pressure hot gas in the induced draft anti-icing device, ensuring the energy utilization efficiency of the anti-icing function.

Claims

1. An adjustable-angle air-induced anti-icing device, characterized in that: The device includes an air-induced anti-icing unit, which comprises an air-induced anti-icing branch pipe and a movable connecting rod. A connecting rod fixing bracket is connected to the rear of the air-induced anti-icing branch pipe. The connecting rod fixing bracket is connected to the movable connecting rod through a fixing pin. An air-induced anti-icing nozzle is provided in front of the air-induced anti-icing branch pipe and is connected to the air-induced anti-icing branch pipe. An upper limit sleeve and a lower limit sleeve are respectively provided in the air-induced anti-icing branch pipe, with the upper limit sleeve located above the lower limit sleeve. The movable connecting rod drives the air intake anti-icing branch pipe to rotate via a fixed pin, and its rotation angle θ varies from -45° to 45°.

2. The adjustable-angle air-induced anti-icing device according to claim 1, characterized in that: The bleed air anti-icing branch pipe is equipped with an upper limit boss that limits the position of the upper limit sleeve and a lower limit boss that limits the position of the lower limit sleeve.

3. The adjustable-angle air-induced anti-icing device according to claim 1, characterized in that: The upper and lower limit sleeves are threaded to connect to the bleed air anti-icing branch pipe by rotation.

4. The adjustable-angle air-induced anti-icing device according to claim 1, characterized in that: The outer diameter Dp of the induced draft anti-icing nozzle ranges from 16mm to 20mm, and the wall thickness of the induced draft anti-icing nozzle is δ.

5. The adjustable-angle air-induced anti-icing device according to claim 1, characterized in that: The outer diameter of the induced air anti-icing branch pipe is Dn, and the wall thickness is 2δ; the outer diameter of the upper limit sleeve and the lower limit sleeve is Dn-4δ, and the wall thickness is δ; the connecting rod fixing bracket is a square metal strip with a width and height of 2δ, which is welded to the induced air anti-icing branch pipe. The welding position is at the intersection of the center line of the induced air anti-icing nozzle and the opposite side surface of the induced air anti-icing branch pipe.

6. The adjustable-angle air-induced anti-icing device according to claim 1, characterized in that: The air-drawing anti-icing unit comprises four units arranged in parallel.

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