External field blade static balance repairing tool

Abstract

The utility model relates to an outfield blade static balance repairing tool which comprises a blade root positioning assembly, a blade tip supporting assembly, a blade root supporting frame and an electronic scale supporting table. The blade tip supporting assembly comprises a supporting block body and a positioning pin, the supporting block body has a front edge positioning function, a front edge positioning groove is matched with the front edge of the blade tip in shape, and the opening direction of the front edge positioning groove is vertically upward; the blade tip supporting assembly is provided with a positioning pin groove, the positioning pin groove corresponds to the counterweight box hole, one end of the positioning pin can be inserted into the counterweight box hole, and the other end of the positioning pin falls into the positioning pin groove, so that the blade is positioned; the static moment value detection device is high in static moment value detection repetition precision, convenient to use, small in occupied area, low in environment requirement and low in cost.

Description

Technical Field

[0001] This utility model relates to the field of blade static torque measurement technology, specifically providing a tooling for repairing static balance of blades in the field. Background Technology

[0002] Static balancing of the main blades involves adjusting the weight of the counterweights in the static balancing box to adjust the static torque difference of the blades caused by manufacturing deviations, ensuring that the static torque of each blade in the same aircraft is adjusted within a certain range. Existing technologies are as follows:

[0003] 1) A device for measuring and adjusting the static balance of helicopter rotor blades and its method of use (CN115931221A). This invention discloses a device for measuring and adjusting the static balance of helicopter rotor blades. It includes a T-shaped support base, an electronic balance assembly, and a T-shaped bracket assembly.

[0004] 2) A method and fixture for measuring the center of gravity of a rotor (CN109163847A). This invention relates to a method and fixture for measuring the center of gravity of a rotor, including a rotor root bushing positioning device, a rotor blade leading edge positioning device, and three electronic scales. The rotor blade center of gravity position is calculated using three-point support and the weight of the three points.

[0005] 3) A tail rotor blade static balance testing fixture (CN110657918A) This invention relates to a tail rotor blade static balance testing fixture, which includes a weight measuring instrument and a support structure. The support structure is used to place the tail rotor blade and uses the lever principle to detect the static balance relationship of the two blades.

[0006] Existing technologies all require a stable connection between the blade and the measuring device to reliably measure the blade's static moment. However, human error during each blade installation leads to significant fluctuations in measurement results, failing to meet actual production requirements. Controlling these operational fluctuations is difficult, necessitating constant fine-tuning of the blade, which is time-consuming and labor-intensive. Existing balance-type blade static moment measuring devices have a large footprint, while digital measuring devices are not only space-consuming but also extremely expensive and difficult to debug. Utility Model Content

[0007] The purpose of this invention is to address the following issues: based on the analysis of the principle of blade static torque measurement, this invention focuses on solving the problems of poor repeatability and accuracy in blade static torque measurement, which does not meet the requirements of use; cumbersome and complex blade installation and positioning with low installation efficiency; complicated static torque adjustment operation; and large footprint and high cost of static balance detection device.

[0008] The technical solution of this utility model is:

[0009] A static balancing repair fixture for an outdoor blade is provided, wherein the blade has a counterweight box hole at its leading edge, and the counterweight box hole and the blade root bushing together form the installation reference for the entire blade.

[0010] The field blade static balancing repair fixture includes a blade root positioning component 2, a blade tip support component 3, a blade root support frame 4, and an electronic scale support platform 5; the electronic scale support platform 5 is equipped with an electronic scale for weighing the counterweight.

[0011] The blade root positioning component 2 is used to support the blade root of the blade 1; the blade tip support component 3 is used to support the blade tip of the blade 1; the blade root positioning component is fixed to the upper end of the blade root support frame 4, and the blade tip support component 3 is supported on the table surface of the electronic scale support platform 5.

[0012] The propeller tip support assembly 3 includes a support block body and a positioning pin. The support block body has a leading edge positioning groove 3-1, which is adapted to the shape of the leading edge of the propeller tip, and the opening direction of the leading edge positioning groove is vertically upward. The propeller tip support assembly 3 has a positioning pin groove 3-4, which corresponds to the counterweight box hole. One end of the positioning pin can be inserted into the counterweight box hole, and the other end can fall in the positioning pin groove, so that the propeller blade is positioned.

[0013] The paddle tip support assembly 3 also has a counterweight placement platform 3-2, which has multiple placement slots 3-3 for preventing the counterweight from falling.

[0014] Furthermore, the counterweight placement platform has a horizontally flipped edge.

[0015] Furthermore, there are at least four placement slots 3-3.

[0016] Furthermore, the opening of the positioning pin groove is vertically upward.

[0017] Furthermore, the leading edge positioning groove is a V-shaped groove or a U-shaped groove.

[0018] Furthermore, the locating pin groove is a V-groove or a U-groove.

[0019] The advantages of this utility model are: high repeatability of static torque value detection, easy to use, small footprint, low environmental requirements, and low cost. Attached Figure Description

[0020] Figure 1 This is a schematic diagram illustrating the use of this utility model;

[0021] Figure 2 This is a schematic diagram of the support block structure of the propeller tip support assembly;

[0022] Figure 3 A schematic diagram illustrating the use of the propeller tip support assembly;

[0023] Among them: 1-blade, 2-blade tip support assembly, 3-blade root positioning assembly, 4-blade root support frame, 5-electronic scale support platform. Detailed Implementation

[0024] The disclosed examples will be described more fully with reference to the accompanying drawings, in which some (but not all) of the disclosed examples are shown. In fact, many different examples may be described, and these examples should not be construed as limited to those set forth herein. Rather, these examples are described so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art.

[0025] A static balancing repair fixture for an outdoor blade is provided, wherein the blade has a counterweight box hole at its leading edge, and the counterweight box hole and the blade root bushing together form the installation reference for the entire blade.

[0026] The field blade static balancing repair fixture includes a blade root positioning component 2, a blade tip support component 3, a blade root support frame 4, and an electronic scale support platform 5; the electronic scale support platform 5 is equipped with an electronic scale for weighing the counterweight.

[0027] The blade root positioning component 2 is used to support the blade root of the blade 1; the blade tip support component 3 is used to support the blade tip of the blade 1; the blade root positioning component is fixed to the upper end of the blade root support frame 4, and the blade tip support component 3 is supported on the table surface of the electronic scale support platform 5.

[0028] The propeller tip support assembly 3 includes a support block body and a positioning pin. The support block body has a leading edge positioning groove 3-1, which is adapted to the shape of the leading edge of the propeller tip, and the opening direction of the leading edge positioning groove is vertically upward. The propeller tip support assembly 3 has a positioning pin groove 3-4, which corresponds to the counterweight box hole. One end of the positioning pin can be inserted into the counterweight box hole, and the other end can fall in the positioning pin groove, so that the propeller blade is positioned.

[0029] The paddle tip support assembly 3 also has a counterweight placement platform 3-2, which has multiple placement slots 3-3 for preventing the counterweight from falling.

[0030] The counterweight placement platform has a horizontally flipped edge.

[0031] There are four placement slots 3-3.

[0032] The opening of the positioning pin groove is vertically upward.

[0033] The leading edge positioning groove is a V-shaped groove.

[0034] The locating pin groove is a U-shaped groove.

[0035] Descriptions of various advantageous arrangements have been shown for illustrative and descriptive purposes, but such descriptions are not intended to be exclusive or limited to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. Furthermore, different advantageous examples may describe different advantages compared to other advantageous examples. One or more examples have been selected and described in order to best illustrate the principles and practical application of the examples, and to enable those skilled in the art to understand that this disclosure contains various examples with various modifications suitable for the particular intended use.

Claims

1. A static balancing repair fixture for an outdoor blade, wherein the leading edge of the blade has a counterweight box hole, and the counterweight box hole and the blade root bushing together form the installation reference for the entire blade; characterized in that: The field blade static balancing repair fixture includes a blade root positioning component (2), a blade tip support component (3), a blade root support frame (4), and an electronic scale support platform (5); the electronic scale support platform (5) is equipped with an electronic scale for weighing the counterweight. The blade root positioning assembly (2) is used to support the blade root of the blade (1); the blade tip support assembly (3) is used to support the blade tip of the blade (1); the blade root positioning assembly is fixed to the upper end of the blade root support frame (4), and the blade tip support assembly (3) is supported on the table surface of the electronic scale support platform (5). The propeller tip support assembly (3) includes a support block body and a positioning pin. The support block body has a leading edge positioning groove (3-1). The leading edge positioning groove is adapted to the leading edge shape of the propeller tip, and the opening direction of the leading edge positioning groove is vertically upward. The blade tip support assembly (3) has a positioning pin groove (3-4), which corresponds to the counterweight box hole. One end of the positioning pin can be inserted into the counterweight box hole, and the other end can fall into the positioning pin groove, so that the blade is positioned. The paddle tip support assembly also has a counterweight placement platform (3-2), which has multiple placement slots (3-3) for preventing the counterweight from falling.

2. The field blade static balancing repair fixture as described in claim 1, characterized in that: The counterweight placement platform has a horizontally flipped edge.

3. The field blade static balancing repair fixture as described in claim 1, characterized in that: There are at least four placement slots (3-3).

4. The field blade static balancing repair fixture as described in claim 1, characterized in that: The opening of the positioning pin groove is vertically upward.

5. The field blade static balancing repair fixture as described in claim 1, characterized in that: The leading edge positioning groove is a V-shaped groove or a U-shaped groove.

6. The field blade static balancing repair fixture as described in claim 1, characterized in that: The locating pin groove is a V-groove or a U-groove.

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