An adjustable static moment measuring device for rotor blades and its usage method

Abstract

The present invention discloses an adjustable measuring device for the static moment of rotor blades and a using method thereof, belonging to the technical field of testing rotor blades of aeroengines and gas turbines. The device includes a fixed arm, a digital display ruler, a moving arm, a tenon head and a setscrew, which change the overall structure of the original measuring device into an adjustable structure. By moving the moving arm, the radius dimension of the wheel disc is adjusted, so that a set of devices can complete the measurement of the static moment of different rotor blades. When measuring the static moment of each blade, only the tenon head corresponding to the blade needs to be replaced to complete the installation of the blade. A set of devices can meet the measurement of the static moment of blades with different wheel disc radius dimensions of multiple aircraft models, greatly reducing the tooling design and manufacturing costs and shortening the manufacturing period of the fixture. The device adopts a split structure, reducing the weight of the device, shortening the stabilization time of the torque scale sensor during testing, improving the work efficiency and expanding the measurement range.

Description

Technical Field

[0001] The present invention belongs to the technical field of aero-engine and gas turbine rotor blade testing, and particularly relates to an adjustable rotor blade static moment measuring device and a using method thereof. Background Art

[0002] In the development and production of aero-engine and gas turbine rotor blades, the blade static moment measuring device currently adopts an integral structure of a fixed arm, a moving arm and a tenon head. Since there are many engine models involved, the structures and sizes of each model are different, and each type of rotor corresponds to multiple stages of disk, the radii of each stage of disk are different, and corresponding devices need to be designed for each stage of blade to measure the blade static moment. As a result, the number of measuring devices is large, the cost is high, and the economy is poor. Summary of the Invention

[0003] In order to overcome the above-mentioned drawbacks of the prior art, the purpose of the present invention is to provide an adjustable rotor blade static moment measuring device and a using method thereof, so as to solve the technical problems of large number of measuring devices, high cost and poor economy in the prior art.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] An adjustable rotor blade static moment measuring device, comprising: a fixed arm, a digital display ruler, a moving arm, a tenon head and a set screw; the fixed arm is fixed on the torque scale flange of the static moment measuring device, the moving arm is in clearance fit with the fixed arm, the tenon head is connected with the moving arm for installing the blade, one end of the digital display ruler is fixed on the fixed arm, the other end is in contact with the moving arm, and the set screw is arranged on the fixed arm for fixing the moving arm and the fixed arm.

[0006] Preferably, the fixed arm is connected to the torque scale flange of the static moment measuring device through a first connecting screw.

[0007] Preferably, a center pin is further arranged at one end of the fixed arm, and the center pin is positioned with the positioning hole of the torque scale flange of the static moment measuring device.

[0008] Preferably, the moving arm and the fixed arm are circumferentially fixed by a flat key.

[0009] Preferably, the tenon head is fixed at the end of the moving arm through a second connecting screw.

[0010] Preferably, the moving arm and the fixed arm adopt a sliding rod and sliding sleeve type clearance fit.

[0011] The present invention also discloses a using method of an adjustable rotor blade static moment measuring device, comprising:

[0012] S1: Install the tenon head and load the blade into the tenon head groove;

[0013] S2: Adjust the moving arm to the initial position "0" at the left end and zero the digital display ruler.

[0014] S3: According to the radius of the blade wheel disc, adjust the moving arm to reach the required size of the wheel disc radius of the blade to be measured.

[0015] S4: After the position of the moving arm is determined, lock and fix the moving arm with a setscrew.

[0016] S5: Turn on the torque scale, and start measuring the static torque of the blade after the device sensor is stable.

[0017] Preferably, in S1, the tenon is fixed to one end of the moving arm by a second connecting screw.

[0018] Preferably, in S3, adjust the moving arm to move to the right, and the digital display ruler shows the adjustment value in real time.

[0019] Preferably, replace the tenon for installing the corresponding blade and adjust the moving arm to complete the adjustment of different wheel disc radii.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] An adjustable static torque measuring device for a rotor blade disclosed by the present invention changes the overall structure of the original measuring device into an adjustable structure, adjusts the wheel disc radius size by moving the moving arm, and realizes the measurement of the static torque of different rotor blades with one set of devices. When measuring the static torque of each blade, only need to replace the tenon corresponding to the blade to complete the installation of the blade. One set of devices can meet the measurement of the static torque of blades with different wheel disc radius sizes of multiple aircraft models, greatly reducing the tooling design and manufacturing costs and shortening the fixture manufacturing period; adopting a split structure, the weight of the device is reduced, the stable time of the torque scale sensor during testing is shortened, the work efficiency is improved, and the measurement range is expanded.

[0022] Further, the moving arm and the fixed arm are in clearance fit, and a flat key is used to prevent rotation.

[0023] Further, the center pin on the fixed arm is positioned with the positioning hole of the torque scale flange to ensure concentricity. Description of the Drawings

[0024] Figure 1 is a schematic structural diagram of the present invention;

[0025] Figure 2 is Figure 1 sectional view taken along the direction A of

[0026] Wherein: 1 - torque scale flange; 2 - connecting screw; 3 - fixed arm; 4 - digital display ruler; 5 - flat key; 6 - moving arm; 7 - tenon; 8 - connecting screw; 9 - setscrew; 10 - center pin. Detailed implementation manners

[0027] To enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0028] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above accompanying drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described here can be implemented in an order different from those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0029] The present invention will be further described in detail below with reference to the accompanying drawings:

[0030] The present invention discloses an adjustable static moment measuring device for rotor blades, which includes: a fixed arm 3, a digital display ruler 4, a moving arm 6, a tenon head 7 and a setscrew 9; the fixed arm 3 is fixed on the torque scale flange 1 of the static moment measuring device, the moving arm 6 is in clearance fit with the fixed arm 3, the tenon head 7 is connected to the moving arm 6 for installing the blade, one end of the digital display ruler 4 is fixed on the fixed arm 3, and the other end is in contact with the moving arm 6. The setscrew 9 is arranged on the fixed arm 3 for fixing the moving arm 6 and the fixed arm 3. The overall structure of the original measuring device is changed to an adjustable structure. By moving the moving arm 6, the radius size of the wheel disc is adjusted to realize the measurement of the static moment of different rotor blades with one set of devices. When measuring the static moment of each blade, only the tenon head 7 corresponding to the blade needs to be replaced to complete the installation of the blade. One set of devices can meet the measurement of the static moment of blades with different wheel disc radius sizes of multiple aircraft models, greatly reducing the tooling design and manufacturing costs and shortening the fixture manufacturing period; adopting a split structure, the weight of the device is reduced, the stable time of the torque scale sensor during testing is shortened, the work efficiency is improved, and the measurement range is expanded.

[0031] As a preferred solution, the fixed arm 3 is connected to the torque scale flange 1 of the static moment measuring device through a first connecting screw 2.

[0032] Preferably, a center pin 10 is further provided at one end of the fixed arm 3, and the center pin 10 is positioned with the positioning hole of the torque scale flange 1 of the static torque measuring device.

[0033] Preferably, the moving arm 6 and the fixed arm 3 are circumferentially fixed by a flat key 5.

[0034] Preferably, the tenon head 7 is fixed to the end of the moving arm 6 by a second connecting screw 8.

[0035] Preferably, the moving arm 6 and the fixed arm 3 are in a clearance fit of a sliding rod and a sliding sleeve.

[0036] The present invention also discloses a use method of an adjustable rotor blade static torque measuring device, including:

[0037] S1: Install the tenon head 7 and install the blade into the groove of the tenon head 7;

[0038] S2: Adjust the moving arm 6 to the initial position "0" at the left end, and zero the digital display ruler 4;

[0039] S3: According to the radius of the blade wheel disc, adjust the moving arm 6 to meet the required dimension of the radius of the wheel disc of the blade to be measured;

[0040] S4: After the position of the moving arm 6 is determined, lock and fix the moving arm 6 with the set screw 9;

[0041] S5: Turn on the torque scale, and start measuring the static torque of the blade after the device sensor is stable.

[0042] Preferably, replace and install the tenon head 7 corresponding to the blade, and adjust the moving arm 6 to complete the adjustment of different wheel disc radii.

[0043] The device is as Figure 1 、 Figure 2 shown, and is composed of a fixed arm 3, a digital display ruler 4, a moving arm 6, a flat key 5, a tenon head 7, a connecting screw 8, a set screw 9 and a center pin 10.

[0044] The fixed arm 3 is connected to the torque scale flange 1 of the static torque measuring device through the first connecting screw 2, and the concentricity is ensured by the positioning of the center pin 10 on the fixed arm with the positioning hole of the torque scale flange. The moving arm 6 and the fixed arm 3 are in a high-precision clearance fit of a sliding rod and a sliding sleeve, and the flat key 5 is used to prevent rotation. The tenon head 7 is connected to the moving arm and is used to install the blade. One end of the digital display ruler 4 is fixed on the fixed arm, and the other end is floatingly supported on the moving arm to display the wheel disc radius dimension.

[0045] When adjusting the radius dimension of the adjusting wheel disc, first adjust the moving arm 6 to the leftmost position, zero the digital display ruler 4, continuously move the moving arm 6 to the right, and the digital display ruler 4 will display the adjustment value in real time. When the adjustment value displayed in real time reaches the required dimension of the wheel disc radius, fix the moving arm and the fixed arm with the setscrew 9 to complete the dimension setting of the wheel disc radius. The adjustment of different wheel disc radii is completed by replacing the tenon head for installing the corresponding blade and adjusting the moving arm.

[0046] 1) Install the tenon head 7 and fix it with the second connecting screw 8;

[0047] 2) Connect the end of the fixed arm 3 to the torque scale flange 1, connect the end of the moving arm 6 to the tenon head 7, and the blade can be installed in the groove of the tenon head 7 during measurement;

[0048] 3) Adjust the moving arm 6 to the initial position "0" at the left end and zero the digital display ruler 4;

[0049] 4) According to the radius of the blade wheel disc, adjust the moving arm 6 to reach the required dimension of the wheel disc radius of the blade to be measured;

[0050] 5) After the position of the moving arm 6 is determined, lock and fix the moving arm 6 with the setscrew 9;

[0051] 6) Turn on the torque scale, and start measuring the static torque of the blade after the device sensor is stable.

[0052] For example: The quantity and measurement time of the static torque devices of the 1-9 stage blades of a certain engine are as follows in the table:

[0053]

[0054] The above content is only to illustrate the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby. Any modification made on the basis of the technical solution according to the technical idea proposed by the present invention falls within the protection scope of the claims of the present invention.

Claims

1. A method for using an adjustable rotor blade static moment measuring device, characterized in that, The measuring device includes: a fixed arm (3), a digital display straightedge (4), a moving arm (6), a tenon head (7), and a setscrew (9); the fixed arm (3) is fixed on the torque scale flange (1) of the static torque measuring device, the moving arm (6) is in clearance fit with the fixed arm (3), the tenon head (7) is connected to the moving arm (6) for installing the blade, one end of the digital display straightedge (4) is fixed on the fixed arm (3), the other end contacts the moving arm (6), and the setscrew (9) is arranged on the fixed arm (3) for fixing the moving arm (6) and the fixed arm (3); The usage method includes: S1: Install the tenon head (7) and load the blade into the groove of the tenon head (7); S2: Adjust the moving arm (6) to the initial position "0" at the left end, and zero the digital display straightedge (4); S3: According to the blade disk radius, adjust the moving arm (6) to reach the required dimension of the disk radius of the blade to be measured; S4: After the position of the moving arm (6) is determined, lock and fix the moving arm (6) with the setscrew (9); S5: Turn on the torque scale, and start measuring the static torque of the blade after the device sensor is stable.

2. The usage method of an adjustable rotor blade static moment measuring device according to claim 1, characterized in that, The fixed arm (3) is connected to the torque scale flange (1) of the static torque measuring device through a first connecting screw (2).

3. The usage method of an adjustable rotor blade static moment measuring device according to claim 1, characterized in that, One end of the fixed arm (3) is also provided with a center pin (10), and the center pin (10) is positioned with the positioning hole of the torque scale flange (1) of the static torque measuring device.

4. The method of using an adjustable rotor blade static moment measuring device according to claim 1, characterized in that, The moving arm (6) and the fixed arm (3) are circumferentially fixed by a flat key (5).

5. The usage method of an adjustable rotor blade static moment measuring device according to claim 1, characterized in that The tenon head (7) is fixed to the end of the moving arm (6) by a second connecting screw (8).

6. The usage method of an adjustable rotor blade static moment measuring device according to claim 1, characterized in that, The moving arm (6) and the fixed arm (3) adopt a sliding rod and sliding sleeve type clearance fit.

7. The usage method of an adjustable rotor blade static moment measuring device according to claim 1, characterized in that, In S1, the tenon head (7) is fixed to one end of the moving arm (6) by a second connecting screw (8).

8. The method of using an adjustable rotor blade static moment measuring device according to claim 1, characterized in that, In S3, adjust the moving arm (6) to move to the right, and the digital display straightedge (4) real-time displays the adjustment value.

9. The usage method of an adjustable rotor blade static moment measuring device according to claim 1, characterized in that, Replace and install the tenon head (7) corresponding to the blade, and adjust the moving arm (6) to complete the adjustment of different disk radii.

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