A propeller hub fatigue test device

Abstract

The application discloses a propeller hub fatigue test device, which comprises a test table and a controller, the cross section of the test table is annular, and the upper end surface of the test table is arranged to be inclined to the horizontal plane; a motor is fixed at the inner center of the test table, the motor is electrically connected with the controller, the rotating shaft of the motor is arranged vertically upward, the rotating shaft is fixedly connected with a hub, the hub is arranged at the upper end opening of the test table, a plurality of blades are evenly arranged on the outer side of the hub, and the blade roots of the blades are in rotational contact with the annular end surface of the upper end of the test table. The application can improve the loading frequency and shorten the hub fatigue test period.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of propeller test, in particular to a propeller hub fatigue test device. BACKGROUND

[0002] The propeller hub is the core load-bearing part of the propeller, and has an important influence on the fatigue performance, safety, reliability and maintainability of the propeller. According to the fatigue statistical principle, in order to ensure the safety of the propeller hub, the fatigue test is generally carried out for 3e7 cycles of load, and due to the large number of cycles, the fatigue test period is also long.

[0003] Therefore, how to provide a propeller hub fatigue test device which can not only increase the loading frequency but also shorten the propeller hub fatigue test period is a problem to be solved by those skilled in the art. SUMMARY

[0004] The present application provides a propeller hub fatigue test device, which aims to solve the above technical problems in the prior art to some extent.

[0005] In order to achieve the above purpose, the present application adopts the following technical solutions:

[0006] A propeller hub fatigue test device, comprising: a test table and a controller, the cross section of the test table is annular, and the upper end surface of the test table is inclined to the horizontal plane; a motor is fixed at the center of the inside of the test table, the motor is electrically connected with the controller, the rotating shaft of the motor is vertically upward, the rotating shaft is fixedly connected with a hub, the hub is arranged at the upper end of the test table, a plurality of blades are evenly arranged on the outer side of the hub, and the blade root of the blade is in rotational contact with the annular end surface of the upper end of the test table.

[0007] Further, the inclination angle of the platform is less than 20°.

[0008] Further, the material of the platform is steel.

[0009] Further, 2-8 blades are installed at equal angles on the outer side of the hub.

[0010] Compared with the prior art, the propeller hub fatigue test device provided by the technical scheme has the advantages that: the motor drives the rotation of the propeller hub, centrifugal load can be generated due to high-speed rotation, and the centrifugal force of the blade is simulated; when the blade root is rotated to a lower position on the upper end surface of the test table, the load of the test table on the blade root is small, and vice versa; the rotation of the blade is realized by the motor, the high-low position of the blade on the test table is contacted and iterated; the load of the test period is adjusted by adjusting the inclination degree of the test table, the loading frequency is adjusted by adjusting the motor speed, and the loading frequency is set according to the need, so that the loading frequency is increased and the hub fatigue test period is shortened.

[0011] The propeller hub fatigue test device has the advantages of simple structure, convenient load adjustment, high-frequency loading of the propeller hub fatigue test realized by the high-power / high-speed motor. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0013] Figure 1 The structure of the present application is shown in the figure.

[0014] Figure 2 The sectional view of the present application is shown in the figure.

[0015] Among them:

[0016] 1-test table; 2-motor; 3-propeller hub; 4-blade. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0018] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application.

[0019] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature "under", "below" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0020] The embodiment of the application discloses a propeller hub fatigue test device, which comprises a test table 1 and a controller, the cross section of the test table 1 is annular, the material is steel, and the upper end surface of the test table 1 is arranged to be inclined to a horizontal plane; a motor 2 is fixed at the inner center of the test table 1, the motor 2 is electrically connected with the controller, the rotating shaft of the motor 2 is vertically arranged upwards, the rotating shaft is fixedly connected with a hub 3, the hub 3 is arranged at the upper end opening of the test table 1, and a plurality of blades 4 are evenly arranged on the outer side of the hub 3; the blade root of the blade 4 is in rotating contact with the annular end surface at the upper end of the test table 1.

[0021] It should be noted that the inclination angle of the test table 1 is generally less than 20°, the inclination degree of the test table can be adjusted by adding a foot pad at the bottom end of the test table, and the load in the test period can be adjusted.

[0022] Advantageously, 2-8 blades are installed at equal angles on the outer side of the hub 3, and the overall balanced force is uniform.

[0023] The motor drives the rotation of the propeller hub, centrifugal load can be generated due to high-speed rotation, and the centrifugal force of the blade is simulated; when the blade root is rotated to a lower position of the upper end surface of the test table, the load of the test table on the blade root is small, and vice versa; the blade is driven to rotate by the motor, so that the blade is in cyclic contact with the high and low positions of the test table; the load in the test period is adjusted by adjusting the inclination degree of the test table, and the loading frequency is adjusted by adjusting the rotating speed of the motor; the loading frequency is set as needed to be improved, and the hub fatigue test period is shortened.

[0024] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts of each embodiment can be referred to each other. For the device disclosed by the embodiments, since it corresponds to the method disclosed by the embodiments, the description is relatively simple, and the related parts can be referred to the method part.

[0025] The foregoing description of the disclosed embodiments enables a person skilled in the art to make or use the application. Modifications of these embodiments will occur to persons of skill in the art, and that the appended claims are intended to cover all such modifications that do not depart from the true spirit and scope of the application. Therefore, the application is not limited to the embodiments shown but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A propeller hub fatigue test device, characterized in that: include: A test bench (1) and a controller, wherein the cross section of the test bench (1) is annular, and the upper end surface of the test bench (1) is arranged at an inclination with respect to a horizontal plane; a motor (2) is fixed at the inner center of the test bench (1), the motor (2) is electrically connected to the controller, the rotating shaft of the motor (2) is arranged vertically upward, the rotating shaft is fixedly connected to a hub (3), the hub (3) is arranged at the upper end of the test bench (1), a plurality of blades (4) are evenly arranged on the outer side of the hub (3), and the blade roots of the blades (4) are in rotational contact with the annular end surface at the upper end of the test bench (1); The inclination angle of the test bench (1) is less than 20°.

2. A propeller hub fatigue testing device according to claim 1, characterized in that: The material of the test bench (1) is steel.

3. A propeller hub fatigue testing device according to claim 1, characterized in that: 2 to 8 blades (4) are installed at equal angles on the outer side of the hub (3).

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