CN111717413A - Method for testing contact load of wheel hub - Google Patents
Method for testing contact load of wheel hub Download PDFInfo
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- CN111717413A CN111717413A CN202010562101.3A CN202010562101A CN111717413A CN 111717413 A CN111717413 A CN 111717413A CN 202010562101 A CN202010562101 A CN 202010562101A CN 111717413 A CN111717413 A CN 111717413A
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- wheel
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- wheel hub
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
- B64F5/00—Designing, manufacturing, assembling, cleaning, maintaining or repairing aircraft, not otherwise provided for; Handling, transporting, testing or inspecting aircraft components, not otherwise provided for
- B64F5/60—Testing or inspecting aircraft components or systems
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- Aviation & Aerospace Engineering (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A method for testing contact load of a wheel hub of a locomotive regards the wheel hub structure as a complete rotary body structure, and local detail features of the wheel hub, such as an air valve and a hot melt plug hole, are omitted. And setting a plurality of reference position points along the circumference of the wheel hub clockwise from the position of the hub valve by taking the central line of the hub valve as 0 degree. And adhering a pressure sensor at the 0-degree position, loading a load F on each reference position point, testing the contact load between the tire and the hub in the loading process in real time by the pressure sensor, and recording the obtained test data to realize the contact load test of the wheel and the hub. The stress level and the fracture part of the hub obtained by analyzing the strength of the hub of the airplane by using the load data obtained by the test of the invention are basically consistent with the stress level and the fracture part obtained by the test.
Description
Technical Field
The invention relates to the field of airplane wheel design, in particular to a method for testing the contact pressure of a hub.
Background
The hub of the airplane wheel is used as a main bearing part for taking off and landing of the airplane, and the strength of the hub is directly related to the taking off and landing safety of the airplane, so that strength analysis and calculation are required in the structural design of the hub of the airplane wheel. The wheel hub strength calculation needs accurate load loading, the load loading of the wheel hub strength analysis in China at present mainly refers to a load processing method given in the airplane design manual, a tire is taken as a whole, and an external load is divided into a radial load and a lateral load to be loaded at a rim round angle of a wheel hub according to a mechanical balance principle. The method does not consider the complexity of the internal structure of the tire and the characteristics of the superelasticity material, and the stress level of the wheel hub calculated by the method has a large error from the actual stress level, so that the design of the wheel hub cannot be accurately guided. Wheel hub contact pressure is used as load loading data for wheel hub strength analysis in foreign countries, but specific test methods and test data of the wheel hub contact pressure are not disclosed. The current domestic test method is mainly a stress-strain test method, strain gauges are mainly attached to stress concentration positions and attention areas for measurement, the stress concentration positions and the attention areas cannot be completely covered by the patch positions, the patch positions need to be smooth, and round corners and chamfer positions cannot be attached, so that part of the stress concentration positions cannot be measured.
Disclosure of Invention
In order to overcome the defects that part of stress concentration parts in the prior art cannot be measured and test errors exist, the invention provides a method for testing the contact load of a wheel hub.
The specific process of the invention is as follows:
step 1, setting reference position points:
the reference position points serve as reference points for different angles of the circumference of the wheel when the wheel is loaded.
When the reference position point is set, setting the central line of the wheel hub valve as 0 degree position, and setting the reference position point every 20 degrees in the clockwise direction of the wheel hub circumference from the position of the wheel hub valve; the setting range is 0-180 degrees; 10 reference position points are obtained.
the pressure sensor is adhered to the 0 degree position. When the pressure sensor is pasted, the pressure sensor is pasted on the outer circumferential surface of the hub, one end of the pressure sensor is located on the outer end face of the hub, and the axial distance between the other end of the pressure sensor and the center line of the tire steel wire is 46 mm.
And step 3, loading:
and after the pressure sensor is well adhered, a tire is arranged on the wheel hub to obtain the wheel.
The airplane wheel is arranged on a static test bed to load the airplane wheel tire, and specifically comprises the following steps: keeping the wheel stationary. Loading a load F at the 0-degree position, wherein the magnitude of the load F is determined according to design requirements, and the direction of the load F is vertical to the circumferential surface of the wheel tire; and in the real-time test loading process of the pressure sensor, the contact load between the tire and the hub is measured, and the obtained test data is recorded. And when the loading load meeting the design requirement is reached, stopping loading.
And rotating the wheel 20 degrees anticlockwise, loading on a second reference position point, testing the contact load between the tire and the wheel hub in the loading process in real time, and recording the obtained test data. The loading and testing process is the same as that of the 0 degree position.
And repeating the loading and testing process, rotating the wheel counterclockwise to 40 degrees, 60 degrees, … … degrees and 180 degrees in sequence, completing the loading and testing process of the other 8 reference position points one by one, and respectively obtaining the contact load between the tire and the wheel hub of each reference position point.
And at this point, the contact load test of the wheel hub is completed.
The invention provides a method for testing the contact pressure of a wheel hub of a wheel. The stress level and the fracture part of the hub obtained by analyzing the strength of the hub of the airplane by using the load data obtained by the test of the method are basically consistent with the stress level and the fracture part obtained by the test.
The invention regards the wheel hub structure as a complete solid of revolution structure, and omits local detail features of the wheel hub, such as an inflating valve and a hot melt plug hole. And setting a plurality of reference position points along the circumference of the wheel hub clockwise from the position of the hub valve by taking the central line of the hub valve as 0 degree. And adhering a pressure sensor at the 0-degree position, loading a load F on each reference position point, testing the contact load between the tire and the hub in the loading process in real time by the pressure sensor, and recording the obtained test data to realize the contact load test of the wheel and the hub.
The pressure of the contact part of the hub is measured by the invention, and the measurement result is input into finite element software to carry out strength model checking and recalculation, and the obtained stress level and the fracture part of the hub are completely consistent with the stress level and the fracture part obtained by the test, which is shown in table 1 specifically.
TABLE 1 hub Strength finite element simulation and test result comparison
Drawings
Fig. 1 is a schematic view of sensor attachment.
Fig. 2 is a schematic view of the circumferential sensor attachment.
FIG. 3 is a schematic view of a reference location point of an aircraft hub.
Fig. 4 is a flow chart of the present invention.
In the figure: 1. a pressure sensor; 2. a hub.
Detailed Description
The contact pressure of the hub of a certain airplane wheel is tested as follows:
step 1, setting reference position points:
the reference position points serve as reference points for different angles of the circumference of the wheel when the wheel is loaded.
When the reference position point is set, setting the central line of the wheel hub valve as 0 degree position, and setting the reference position point every 20 degrees in the clockwise direction of the wheel hub circumference from the position of the wheel hub valve; the setting range is 0-180 degrees; 10 reference position points are obtained. As shown in fig. 3.
a planar strip-shaped pressure sensor 1 is pasted at the 0-degree position; the pressure sensor is adhered to the outer circumferential surface of the hub, one end of the pressure sensor is positioned on the outer end face of the hub 2, and the axial distance between the other end of the pressure sensor and the center line of the tire steel wire is 46 mm.
And step 3, loading:
and after the pressure sensor is well adhered, installing the tire according to a conventional method to obtain the airplane wheel.
The airplane wheel is arranged on a static test bed to load the airplane wheel tire, and specifically comprises the following steps: keeping the wheel stationary. Loading a load F at the 0 degree position, wherein the load F is determined according to the design requirement, and the direction of the load F is vertical to the circumferential surface of the wheel tire, as shown in FIG. 3; and in the real-time test loading process of the pressure sensor, the contact load between the tire and the hub is measured, and the obtained test data is recorded. And when the loading load meeting the design requirement is reached, stopping loading.
And rotating the wheel 20 degrees anticlockwise, loading on a second reference position point, testing the contact load between the tire and the wheel hub in the loading process in real time, and recording the obtained test data. The loading and testing process is the same as that of the 0 degree position.
And repeating the loading and testing process, rotating the wheel counterclockwise to 40 degrees, 60 degrees, … … degrees and 180 degrees in sequence, completing the loading and testing process of the other 8 reference position points one by one, and respectively obtaining the contact load between the tire and the wheel hub of each reference position point.
And at this point, the contact load test of the wheel hub is completed.
The load data obtained by the embodiment is used for analyzing the strength of the wheel hub of the airplane, and the obtained stress level and the fracture part of the wheel hub are completely consistent with those obtained by the test. The method for testing the contact pressure of the wheel hub can be used for analyzing the strength of the wheel hub structure and guiding the structural design of the wheel hub.
Claims (3)
1. A method for testing the contact load of a wheel hub is characterized by comprising the following specific steps:
step 1, setting reference position points:
the reference position point is used as a reference point of different angles of the circumference of the airplane wheel when the airplane wheel is loaded;
when the reference position point is set, setting the central line of the wheel hub valve as 0 degree position, and setting the reference position point every 20 degrees in the clockwise direction of the wheel hub circumference from the position of the wheel hub valve; the setting range is 0-180 degrees; obtaining 10 reference position points;
step 2, sticking a pressure sensor;
and step 3, loading:
after the pressure sensor is well adhered, a tire is installed on the wheel hub to obtain a wheel;
the airplane wheel is arranged on a static test bed to load the airplane wheel tire, and specifically comprises the following steps: keeping the airplane wheel still; loading a load F at the 0 ° position; testing the contact load between the tire and the hub in the loading process in real time through the pressure sensor and recording the obtained test data; stopping loading after the loading load reaches the design requirement;
rotating the wheel 20 degrees anticlockwise, loading on a second reference position point, testing the contact load between the tire and the wheel hub in the loading process in real time, and recording the obtained test data; the loading and testing process is the same as that of the loading and testing process at the 0-degree position;
repeating the loading and testing process, rotating the wheel counterclockwise to 40 degrees, 60 degrees, … … degrees and 180 degrees in sequence, completing the loading and testing process of the rest 8 reference position points one by one, and respectively obtaining the contact load between the tire and the wheel hub of each reference position point;
and at this point, the contact load test of the wheel hub is completed.
2. The method for testing contact load of the wheel hub of the airplane as claimed in claim 1, wherein the pressure sensor is pasted at the 0 ° position; when the pressure sensor is pasted, the pressure sensor is pasted on the outer circumferential surface of the hub, one end of the pressure sensor is located on the outer end face of the hub, and the axial distance between the other end of the pressure sensor and the center line of the tire steel wire is 46 mm.
3. The wheel hub contact load testing method of claim 1, wherein the direction of the load F is perpendicular to the circumferential surface of the wheel tire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010562101.3A CN111717413A (en) | 2020-06-18 | 2020-06-18 | Method for testing contact load of wheel hub |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010562101.3A CN111717413A (en) | 2020-06-18 | 2020-06-18 | Method for testing contact load of wheel hub |
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| CN111717413A true CN111717413A (en) | 2020-09-29 |
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| CN202010562101.3A Pending CN111717413A (en) | 2020-06-18 | 2020-06-18 | Method for testing contact load of wheel hub |
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Citations (7)
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| US20030041666A1 (en) * | 2001-08-24 | 2003-03-06 | Parker Paul Daniel | Balance correction system with on-car runout device |
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| CN201597753U (en) * | 2009-11-18 | 2010-10-06 | 北京北摩高科摩擦材料有限责任公司 | Brake airplane wheels of airplane |
| CN103803098A (en) * | 2014-02-13 | 2014-05-21 | 西安航空制动科技有限公司 | Airplane wheel speed simulation device |
| US20140305217A1 (en) * | 2013-04-12 | 2014-10-16 | The Boeing Company | Apparatus for Automated Rastering of an End Effector Over an Airfoil-Shaped Body |
| CN105333848A (en) * | 2015-11-23 | 2016-02-17 | 西安航空制动科技有限公司 | Device and method for measuring aircraft tire compression amount |
| CN110470489A (en) * | 2019-08-16 | 2019-11-19 | 中国汽车技术研究中心有限公司 | Stress state measurement method when a kind of car wheel straight-line travelling |
-
2020
- 2020-06-18 CN CN202010562101.3A patent/CN111717413A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030041666A1 (en) * | 2001-08-24 | 2003-03-06 | Parker Paul Daniel | Balance correction system with on-car runout device |
| CN101339095A (en) * | 2008-09-01 | 2009-01-07 | 洛阳工铭机电设备有限公司 | Automobile hub bearing slurry salty liquor and general durability test method and test machine |
| CN201597753U (en) * | 2009-11-18 | 2010-10-06 | 北京北摩高科摩擦材料有限责任公司 | Brake airplane wheels of airplane |
| US20140305217A1 (en) * | 2013-04-12 | 2014-10-16 | The Boeing Company | Apparatus for Automated Rastering of an End Effector Over an Airfoil-Shaped Body |
| CN103803098A (en) * | 2014-02-13 | 2014-05-21 | 西安航空制动科技有限公司 | Airplane wheel speed simulation device |
| CN105333848A (en) * | 2015-11-23 | 2016-02-17 | 西安航空制动科技有限公司 | Device and method for measuring aircraft tire compression amount |
| CN110470489A (en) * | 2019-08-16 | 2019-11-19 | 中国汽车技术研究中心有限公司 | Stress state measurement method when a kind of car wheel straight-line travelling |
Non-Patent Citations (1)
| Title |
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| 李柯润等: "飞机轮毂载荷边界测试与应用", 《2019航空装备服务保障与维修技术论坛暨中国航空工业技术装备工程协会年会论文集》 * |
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Application publication date: 20200929 |