A multifunctional propeller moment ruler

Abstract

The present invention relates to a multifunctional pitch ruler, comprising: a clamp, a body, a dial, a level indicator, an adjuster and a tension spring. The clamp is used to ensure that the pitch ruler can reliably clamp the propeller blades; the body is used to provide installation space for the clamp, the adjuster, the dial, the level indicator and the tension spring; the dial is used to mark the scales of the initial position and the final position of the level indicator; the level indicator is used to indicate the change in the propeller pitch angle; the adjuster is used to adjust the position of the level indicator to ensure that the level indicator is always in a horizontal position; the tension spring is used to provide the clamp with a tensioning force to reliably clamp the propeller blades. The present invention uses the above-mentioned equipment to realize the functions of comparing the size of the propeller pitch angle and measuring the change.

Description

Technical Field

[0001] The invention relates to a multifunctional propeller pitch ruler, which has a simple and compact structure and has the functions of quickly comparing the pitch angles of propellers and measuring their variations. Background Art

[0002] With the advancement of science and technology, more and more scientific research units and social organizations have rushed into the medium and large aircraft industry in recent years. As one of the core power components of aircraft, propellers provide powerful power for aircraft. In the process of aircraft development, it is often necessary to calibrate the specifications and pitch angles of propellers, as well as measure the range of variation of the pitch angle. The current pitch angle measurement equipment uses an electronic level, which has the problems of poor anti-interference ability, limited resolution, and complex clamping. The present invention has a simple structure and reliable results. Summary of the invention

[0003] The purpose of the present invention is to address the problems of poor anti-interference ability, limited resolution and complex clamping of the current pitch angle measuring equipment - electronic level, and to propose a multifunctional pitch angle ruler, particularly a pitch angle testing device with simple structure and reliable results.

[0004] The technical solution of the present invention is:

[0005] A multifunctional propeller moment gauge comprises: a clamp, a body, a dial, a level indicator, a regulator and a tension spring;

[0006] The body is a rectangular structure;

[0007] The clamp is a bending type clamp, and the clamp comprises a clamping part, a bending part and a hand-holding part connected in sequence;

[0008] The bending portion is hinged to an edge of the body, and the clamp can rotate relative to the body with the edge as a rotation axis;

[0009] One end of the tension spring is connected to the hand-held part, and the other end of the tension spring is connected to a side wall of the body, and the side wall connected to the tension spring serves as a first side wall;

[0010] In the initial state, the side wall of the clamping portion is in contact with the side wall of the main body, and the side wall in contact with the clamping portion serves as the second side wall;

[0011] The common edge of the first side wall and the second side wall coincides with the rotation axis;

[0012] The clamping portion is separated from the second side wall by a tensioning spring; the clamping portion and the second side wall are used to clamp the propeller blades, and the tensioning spring is used to provide a clamping force for clamping the propeller blades, so that the body moves synchronously with the propeller blades;

[0013] The main body is equipped with a regulator, a dial and a level indicator;

[0014] The regulator is used to adjust the positional relationship between the level indicator and the horizontal plane;

[0015] The level indicator is rotatable relative to the dial.

[0016] The measuring accuracy of the propeller blade rotation angle can be changed by changing the scale value of the dial, and various clamping forces can be provided by changing the elastic coefficient of the tension spring.

[0017] A method for measuring the rotation angle of a propeller blade using the above-mentioned propeller moment ruler comprises the following steps:

[0018] 1) holding the gripping portion of the clamp, compressing the tensioning spring, and moving the gripping portion away from the second side wall;

[0019] 2) clamping the propeller blade between the clamping portion and the second side wall;

[0020] 3) Turn the adjuster to make the level indicator in a horizontal position;

[0021] 4) After the propeller pitch angle has changed, turn the regulator again to bring the level indicator to a horizontal position;

[0022] 5) The change in pitch angle can be obtained by reading the angle that the horizontal indicator rotates on the dial.

[0023] The advantages of the present invention compared with the prior art are as follows:

[0024] 1) The present invention has strong anti-interference ability: the measuring device is entirely mechanical and is not affected by the environment;

[0025] 2) The present invention has high resolution: the resolution of measuring the pitch angle can be customized according to different requirements;

[0026] 3) The present invention has good maintainability: the mechanical equipment can be easily inspected and repaired;

[0027] 4) The invention has low cost: the device does not have complicated electronic equipment and has low operation and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the present invention. DETAILED DESCRIPTION

[0029] The present invention invents a multifunctional propeller moment ruler such as Figure 1As shown. The function of the clamp 1 is to ensure that the pitch ruler can reliably clamp the propeller blades. The appropriate clamp should be selected according to the different blade specifications. The function of the dial 3 is to mark the scales of the initial position and the final position of the horizontal indicator 4. According to different measurement accuracy requirements, a dial with a suitable resolution should be selected. The function of the tension spring 6 is to provide the clamp 1 with a tensioning force that can reliably clamp the propeller blades. According to different blade specifications, a suitable tension spring should be selected.

[0030] A multifunctional propeller moment gauge comprises: a clamp 1, a body 2, a dial 3, a level indicator 4, a regulator 5 and a tension spring 6;

[0031] The body 2 is a rectangular structure;

[0032] The clamp 1 is a bending type clamp, and the clamp 1 comprises a clamping part, a bending part and a hand-holding part connected in sequence;

[0033] The bending portion is hinged to an edge of the body 2, and the clamp 1 can rotate relative to the body 2 with the edge as the rotation axis;

[0034] One end of the tension spring 6 is connected to the hand-held part, and the other end of the tension spring 6 is connected to a side wall of the body 2, and the side wall connected to the tension spring 6 is used as a first side wall;

[0035] In the initial state, the side wall of the clamping portion is in contact with the side wall of the body 2, and the side wall against which the clamping portion is in contact serves as the second side wall;

[0036] The common edge of the first side wall and the second side wall coincides with the rotation axis;

[0037] The clamping portion is separated from the second side wall by the tensioning spring 6; the space between the clamping portion and the second side wall is used to clamp the propeller blades, and the tensioning spring 6 is used to provide a clamping force for clamping the propeller blades, so that the body 2 moves synchronously with the propeller blades;

[0038] The main body 2 is provided with a regulator 5, a dial 3 and a level indicator 4;

[0039] The regulator 5 is used to adjust the positional relationship between the level indicator 4 and the horizontal plane;

[0040] The level indicator 4 is rotatable relative to the scale plate 3 .

[0041] The pitch gauge is composed of mechanical components and the measurement results are not affected by the environment.

[0042] The measurement accuracy of the propeller blade rotation angle can be changed by changing the scale value of the scale plate 3. The resolution of the scale plate 3 can be customized according to the measurement accuracy requirements.

[0043] A variety of clamping forces can be provided by changing the elastic coefficient of the tension spring 6. The tension spring 6 is customized according to the clamping force requirements of different measurement occasions. The measured blade angle change is consistent with the horizontal indicator change.

[0044] The operation process includes the following steps:

[0045] 1) Holding the gripping part of the clamp 1, compressing the tensioning spring 6, and moving the gripping part away from the second side wall;

[0046] 2) clamping the propeller blade between the clamping portion and the second side wall;

[0047] 3) Make the level indicator 4 in a horizontal position by turning the adjuster 5;

[0048] 4) After the propeller pitch angle changes, the level indicator 4 is placed in a horizontal position by rotating the regulator 5 again; after the propeller torque changes, the blade pitch angle increases or decreases, and at this time, the level indicator 4 is placed in a horizontal position by rotating the regulator 5;

[0049] 5) The change in pitch angle increase or decrease can be obtained by reading the angle that the horizontal indicator 4 rotates on the dial 3.

[0050] The contents not described in detail in the specification of the present invention belong to the well-known technologies of professionals in the field.

Claims

1. A multifunctional propeller moment ruler, characterized in that: include: A clamp (1), a body (2), a dial (3), a level indicator (4), an adjuster (5) and a tension spring (6); The body (2) is a rectangular structure; The clamp (1) is a bending type clamp, and the clamp (1) comprises a clamping portion, a bending portion and a hand-holding portion which are connected in sequence; The bent portion is hinged to an edge of the body (2), and the clamp (1) can rotate relative to the body (2) with the edge as a rotation axis; One end of the tension spring (6) is connected to the hand-held portion, and the other end of the tension spring (6) is connected to a side wall of the body (2), and the side wall connected to the tension spring (6) serves as a first side wall; In an initial state, the side wall of the clamping portion abuts against the side wall of the body (2), and the side wall abutted by the clamping portion serves as a second side wall; The common edge of the first side wall and the second side wall coincides with the rotation axis; The clamping portion is separated from the second side wall by a tensioning spring (6); the clamping portion and the second side wall are used to clamp the propeller blades, and the tensioning spring (6) is used to provide a clamping force for clamping the propeller blades, so that the body (2) moves synchronously with the propeller blades; A regulator (5), a dial (3) and a level indicator (4) are mounted on the body (2); The regulator (5) is used to adjust the positional relationship between the level indicator (4) and the horizontal plane; The level indicator (4) is rotatable relative to the scale plate (3).

2. A multifunctional propeller pitch ruler according to claim 1, characterized in that: The measurement accuracy of the propeller blade rotation angle can be changed by changing the graduation value of the scale plate (3).

3. A multifunctional propeller moment ruler according to claim 1, characterized in that: Various clamping forces can be provided by changing the elastic coefficient of the tension spring (6).

4. A method for measuring the rotation angle of a propeller blade using the pitch ruler according to claim 1, characterized in that: The steps include: 1) holding the gripping portion of the clamp (1) and compressing the tensioning spring (6) to move the gripping portion away from the second side wall; 2) clamping the propeller blade between the clamping portion and the second side wall; 3) Turn the adjuster (5) to bring the level indicator (4) into a horizontal position; 4) after the propeller pitch angle has changed, the level indicator (4) is again brought into a horizontal position by turning the regulator (5); 5) The change in pitch angle can be obtained by reading the angle at which the horizontal indicator (4) rotates on the dial (3).

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