CN-121973567-A - Design method for quick drainage machine wheel of aircraft machine wheel

CN121973567ACN 121973567 ACN121973567 ACN 121973567ACN-121973567-A

Abstract

The invention relates to the technical field of aircraft wheel design, in particular to an aircraft wheel rapid drainage wheel and a design method thereof. According to the invention, through the design of the divergent diversion surface and the drainage gap, the rapid and active drainage of the accumulated water of the machine wheel under a special environment is realized.

Inventors

WU YINGYING
YAO ZHIWEN
GAN QUAN
XU XIN
LIU YINGHAN

Assignees

西安航空制动科技有限公司

Dates

Publication Date: 20260505
Application Date: 20260311

Claims (10)

1. The quick drainage wheel for the aircraft wheel is characterized by comprising a gradually-expanding guide surface on the inner surface of a wheel hub, and a drainage gap is arranged between the inner surface of the wheel hub and a heat shield.
2. An aircraft wheel quick drain according to claim 1, wherein the hot melt plugs of the wheel are provided protruding from the inner surface of the wheel.
3. The quick drain wheel for aircraft wheels according to claim 1, wherein the angle between the diverging diversion surface and the hub axis is the angle of expansion of the diverging diversion surface, the angle of expansion being 3-5 °.
4. An aircraft wheel quick drain according to claim 1, wherein the inner surface of the hub is provided with a hydrophobic coating or oxide layer.
5. A method of designing an aircraft wheel quick drain wheel according to claims 1-4, comprising: Acquiring the relation between the drainage gap and the accumulated water drainage flow according to the minimum radius of the divergent diversion surface in the hub; designing a drainage gap based on the relation between the drainage gap and the accumulated water drainage flow; acquiring the water accumulation discharge flow rate based on the minimum radius of the gradually-expanding type flow guide surface in the hub, the designed drainage gap and the corresponding water accumulation discharge flow rate, and acquiring the hydraulic diameter based on the minimum radius of the gradually-expanding type flow guide surface in the hub and the designed drainage gap; Acquiring a Reynolds number based on the hydraulic diameter and the accumulated water discharge flow rate, and acquiring an on-way resistance coefficient of accumulated water discharge based on the Reynolds number; designing an expansion angle of a divergent flow guiding surface based on the along-way resistance coefficient of accumulated water discharge, the accumulated water discharge flow velocity, the hydraulic diameter, the rotating speed of a turbine and the minimum radius of the divergent flow guiding surface in the hub; Based on the expansion angle of the drainage gap and the gradually-expanding diversion surface, the hub of the drainage machine wheel is designed.
6. The method for designing a rapid drainage wheel for an aircraft wheel according to claim 5, wherein the relation between the drainage gap and the accumulated water drainage flow is: In the formula, Representing the Weber number; Representing the accumulated water discharge flow; representing the minimum radius of the diverging flow-guiding surface in the hub; Representing a drain gap; The surface tension coefficient of water is shown.
7. The method for designing a rapid drainage wheel for an aircraft wheel according to claim 5, wherein the expression of the drainage flow rate of the accumulated water is: In the formula, Representing the water accumulation drainage flow rate; Representing the accumulated water discharge flow; representing the minimum radius of the diverging flow-guiding surface in the hub; Indicating the drain gap.
8. The method for designing an aircraft wheel quick drain according to claim 5, wherein the hydraulic diameter is expressed as: In the formula, Represents the hydraulic diameter; representing the minimum radius of the diverging flow-guiding surface in the hub; Indicating the drain gap.
9. The method for designing an aircraft wheel rapid drain wheel according to claim 5, wherein the expression of the reynolds number and the on-way drag coefficient is: In the formula, Representing the Reynolds number; Representing the water accumulation drainage flow rate; V represents the kinematic viscosity of water; representing the coefficient of resistance along the way.
10. The method for designing an aircraft wheel rapid drain wheel according to claim 5, wherein the expression of the expansion angle of the diverging guide surface is as follows: Wherein ω represents the rotation speed of the turbine, θ represents the expansion angle of the diverging flow guiding surface, and f represents the acceleration caused by the resistance in the process of discharging the accumulated water; Representing the along-the-way resistance coefficient; Representing the water accumulation drainage flow rate; Indicating the hydraulic diameter.

Description

Design method for quick drainage machine wheel of aircraft machine wheel Technical Field The invention relates to the technical field of aircraft wheel design, in particular to an aircraft wheel rapid water draining machine wheel and a design method thereof. Background The aircraft wheel plays a key role in the take-off and landing operation, and when taking off and landing, the aircraft wheel faces severe working conditions such as sea water splashing, rainwater leakage and the like. The accumulated water in the wheel structure easily causes the problems of the wheel brake device such as reduced braking performance, corrosion acceleration of metal parts and the like, and the service life of the aircraft wheel is seriously influenced. While the existing technology of conventional aircraft wheel structures in terms of drainage has the following drawbacks: 1. The fluid guiding is insufficient, the inclination angle of the drainage channel is not matched with the rotating speed of the turbine, and the centrifugal force utilization rate is low. 2. The drainage path is blocked, and the drainage channel of the traditional hub cavity is blocked by a structure, so that the drainage efficiency is reduced. 3. The capillary effect is remarkable, the gap between the heat shield and the hub is too small, accumulated water is retained by surface tension, the heat insulation performance is affected, and electrochemical corrosion of metal parts is aggravated. 4. And the failure risk of the hot melting plug is that the conventional hot melting plug mounting structure is easy to be covered by accumulated water, so that temperature response delay is caused. Accordingly, there is a need to provide a fast water draining aircraft wheel design method to solve the above-mentioned problems. Disclosure of Invention Aiming at the problem that the air wheel structure in the prior art is insufficient in guiding the fluid in the drainage aspect, the invention provides a design method of an air wheel rapid drainage machine wheel, which aims at solving the existing problem. The invention provides a quick drainage machine wheel for an aircraft wheel, which is used for draining accumulated water in the machine wheel under a high-humidity and high-salt-fog environment. According to a further technical scheme, the hot melt plugs of the machine wheel are arranged to protrude out of the inner surface of the machine wheel. According to the further technical scheme, the included angle between the divergent flow guiding surface and the axis of the hub is the expansion angle of the divergent flow guiding surface, and the expansion angle is 3-5 degrees. According to a further technical scheme, a hydrophobic coating or an oxide layer is arranged on the inner surface of the hub. The second aspect of the invention provides a method for designing an aircraft wheel rapid drainage wheel, comprising the following steps: Acquiring the relation between the drainage gap and the accumulated water drainage flow according to the minimum radius of the divergent diversion surface in the hub; designing a drainage gap based on the relation between the drainage gap and the accumulated water drainage flow; acquiring the water accumulation discharge flow rate based on the minimum radius of the gradually-expanding type flow guide surface in the hub, the designed drainage gap and the corresponding water accumulation discharge flow rate, and acquiring the hydraulic diameter based on the minimum radius of the gradually-expanding type flow guide surface in the hub and the designed drainage gap; Acquiring a Reynolds number based on the hydraulic diameter and the accumulated water discharge flow rate, and acquiring an on-way resistance coefficient of accumulated water discharge based on the Reynolds number; designing an expansion angle of a divergent flow guiding surface based on the along-way resistance coefficient of accumulated water discharge, the accumulated water discharge flow velocity, the hydraulic diameter, the rotating speed of a turbine and the minimum radius of the divergent flow guiding surface in the hub; Based on the expansion angle of the drainage gap and the gradually-expanding diversion surface, the hub of the drainage machine wheel is designed. The invention further adopts the technical scheme that the relation between the drainage gap and the accumulated water drainage flow is as follows: In the formula, Representing the Weber number; Representing the accumulated water discharge flow; representing the minimum radius of the diverging flow-guiding surface in the hub; Representing a drain gap; The surface tension coefficient of water is shown. The invention further adopts the technical scheme that the expression of the accumulated water discharge flow rate is as follows: In the formula, Representing the water accumulation drainage flow rate; Representing the accumulated water discharge flow; representing the minimum radius of the diverging flow-guiding s