Device and method for measuring torsional moment of helicopter tension and torsion bar

Abstract

The invention relates to a device and method for measuring the torsional moment of a helicopter tension-torsion bar, and the device comprises a mounting seat, a supporting region is formed at the upper part of the mounting seat, the supporting region is provided with a middle support located in the middle and side supports symmetrically arranged at the two sides, and the middle support limits the Z-direction freedom degree of the tension-torsion bar; the torsion part is rotationally connected with the corresponding side part support, the rotation angle a is the torsion angle of the loading force, and the torsion part fixes the two ends of the tension-torsion strip, is integrated with the tension-torsion strip and limits the X-direction freedom degree and the Y-direction freedom degree of the tension-torsion strip; a rotating hole of the torque wrench is pre-formed in the torsion part; and the locking part locks the torsion part and the side support, and the torque wrench rotates to directly measure the torsion moment of the corresponding torsion angle. The device can directly measure the torsion moment of the tension and torsion bar without complex calculation, measurement is easy and convenient, a result is easier to obtain, and compared with an indirect measurement method, the measurement method is easy to operate, visual in result, low in cost, small in needed manpower and good in economical efficiency.

Description

Technical Field

[0001] The invention relates to the field of aerospace technology, and more particularly to a device and method for measuring the torsion torque of a helicopter torsion strip. Background Art

[0002] The torsion bar is an important aerodynamic component on the helicopter. It is a major structural load-bearing component. Its main functions include bearing the centrifugal force generated by the rotation of the blades and the torque generated by the pitch change of the blades. The balance of these forces and the stability of the torque play an important role in realizing the pitch change of the tail rotor blades and improving the axial force of the hub. Therefore, it is necessary to measure the torque of the torsion bar.

[0003] At present, the torque measurement method of the torsion bar usually adopts the indirect measurement method. The indirect measurement method is to measure the elongation and torsion angle of the torsion bar, and then calculate the torsion torque of the torsion bar in combination with the mechanical model. However, this measurement method requires high-precision measurement equipment and complex calculation formulas, which makes the measurement process more cumbersome.

[0004] Therefore, how to provide a device that can simplify the measurement of the torque of the helicopter torsion bar is a problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0005] To this end, an object of the present invention is to provide a device for measuring the torsional torque of a helicopter torsion bar, so as to solve the technical problem of complex calculation of indirect measurement of the torsional torque of the torsion bar in the prior art.

[0006] Another object of the present invention is to provide a method for measuring the torsional torque of a helicopter torsion bar to simplify the measurement.

[0007] The present invention provides a device for measuring the torsion torque of a helicopter torsion strip, comprising:

[0008] A mounting seat, wherein a support area is formed on the upper portion of the mounting seat, wherein the support area has a middle support located in the middle and side supports symmetrically arranged on both sides, wherein the middle support limits the Z-direction freedom of the torsion bar;

[0009] The torsion part is rotatably connected to the side support, the rotation angle a is the torsion angle of the loading force, and the torsion part fixes the two ends of the torsion bar, becomes one with the torsion bar, and limits the X-direction and Y-direction degrees of freedom of the torsion bar; the torsion part is provided with a rotation hole for a torque wrench;

[0010] and a locking portion, wherein the locking portion locks the torsion portion and the side support, and the torque wrench is rotated to directly measure the torsion torque corresponding to the torsion angle.

[0011] Furthermore, the mounting seat is a plate-shaped base, wherein a middle hole for mounting the middle support and a middle support fixing hole are provided in the middle thereof; and a plurality of connection holes are provided on both sides thereof corresponding to the side supports.

[0012] Furthermore, a weight-reducing groove is provided on the base.

[0013] Furthermore, the middle support is a columnar support seat, and the downward protruding part of its bottom surface is cooperated and installed with the fixing hole of the middle support, and its bottom plane is fixed to the base; a downwardly concave transverse groove is opened on its top, and the transverse groove carries a transverse plate extending to both sides and close to the two torsion parts, and the transverse plate is fixed to the bottom of the transverse groove, and carries the torsion bar thereon; the groove walls on both sides of the transverse groove are provided with corresponding Z-direction limit holes according to the center hole of the torsion bar, and are fixed by a long pin passing through the Z-direction limit hole and the center hole of the torsion bar.

[0014] Furthermore, a fixed plane is formed on the outer wall of the groove wall.

[0015] Furthermore, the side support adopts an arc-shaped support plate, the bottom surface of which is fixed to the base, a bearing hole is opened in the horizontal direction on the top, and is rotatably connected to the torsion part through a deep groove ball bearing; the lower part of the bearing hole has a pin hole and a limit pin hole.

[0016] Furthermore, the torsion part is an asymmetrical torsion block, which includes a plate-shaped torsion body, a support fixing platform is provided on the torsion body close to the middle support side, and the support fixing platform fixes the end of the torsion strip; a cylindrical platform is provided on the side of the torsion body away from the support fixing platform corresponding to the torsion strip, and a square rotating hole is located in the cylindrical platform and passes through the upper part of the torsion body; a body positioning pin hole and a torsion strip hole are provided on the lower part of the torsion body.

[0017] Furthermore, the cylindrical table is inserted into the bearing hole so that the end face of the torsion body fits against the arc-shaped support plate, and the support fixing table is vertically provided with a fixing hole for the end of the torsion strip, which is positioned and fixed by a positioning pin; the main body positioning pin hole at the lower part of the torsion body corresponds to the pin hole and is positioned by the pin, and the torsion long strip hole corresponds to the limit pin hole and is temporarily fixed by a limit pin and a nut.

[0018] Furthermore, the outer portion of the limit pin is limited by a pin, wherein the latch, the limit pin, the nut and the pin constitute the locking portion.

[0019] The present invention provides a method for using the device for measuring the torsion torque of a helicopter torsion strip, comprising the following steps:

[0020] S1. Install the torsion bar, fix the middle part of the torsion bar on the middle support to limit the Z-direction freedom of the torsion bar; fix the two ends of the torsion bar on the torsion part to limit the X-direction freedom and Y-direction freedom of the torsion bar;

[0021] S2. Measurement: first position the locking part to ensure that the torsion angle a is 0°; insert the torque wrench into the rotating hole, and under the premise of ensuring that the device is in the initial state, cancel the positioning of the locking part, and turn the torque wrench to drive the torsion part to rotate; measure the maximum torque when the torsion angle a of the torsion bar is between 0°-15° and -15°-0°; when measuring the torque, it is necessary to tighten the side support and the torsion part, keep the torsion angle unchanged, and read the value on the torque wrench.

[0022] It can be seen from the above technical scheme that compared with the prior art, the present invention discloses a device for measuring the torsional torque of a helicopter torsion bar, which limits the freedom of the torsion bar in the Z, X and Y directions through the middle support and the side, and fixes the two ends of the torsion bar to the torsion part. The torque is applied by a torque wrench to rotate the torsion bar to produce a corresponding rotation angle, and the torsion torque of the torque wrench is recorded. The device can directly measure the torsion torque of the torsion bar without complicated calculations, the measurement is simple, and the results are easier to obtain. Compared with the indirect measurement method, the measurement method of the present invention is simple to operate, the results are intuitive, the cost is low, less manpower is required, and the economy is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0024] Figure 1 The accompanying drawing is a schematic cross-sectional view of a device for measuring the torsion torque of a helicopter torsion strip provided by the present invention;

[0025] Figure 2 The attached picture is Figure 1 A top view of

[0026] Figure 3 The attached picture is Figure 1 Side view of

[0027] Figure 4 The accompanying drawing is a stereoscopic view of a device for measuring the torsion torque of a helicopter torsion strip provided by the present invention;

[0028] Figure 5 The accompanying drawing is a schematic diagram of the structure of the base;

[0029] Figure 6The accompanying drawing is a schematic diagram of the structure of the arc support plate;

[0030] Figure 7 The accompanying drawing is a schematic diagram of the structure of the support seat;

[0031] Figure 8 The accompanying drawing is a stereoscopic view of the torsion block from one viewing angle;

[0032] Fig. 9 The attached figure is a stereoscopic view of the torsion block from another perspective. DETAILED DESCRIPTION

[0033] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Since the torque measurement method of the torsion bar in the prior art usually adopts an indirect measurement method, it is necessary to select high-precision measuring equipment to avoid measurement errors as much as possible. After the measurement, it is also necessary to perform complex calculations based on the mechanical model, which has low measurement efficiency and high cost. In view of this, the embodiment of the present invention discloses a device for measuring the torsion torque of a helicopter torsion bar, including: a mounting seat, the upper part of the mounting seat forms a support area, the support area has a middle support located in the middle and side supports symmetrically arranged on both sides, and the middle support limits the Z-direction freedom of the torsion bar; a torsion part, the torsion part is rotatably connected to the side support, the rotation angle a is the torsion angle of the loading force, and the torsion part fixes the two ends of the torsion bar, becomes one with the torsion bar, and limits the X-direction freedom and Y-direction freedom of the torsion bar; a rotation hole for a torque wrench is preset on the torsion part; and a locking part, the locking part locks the torsion part and the side support, and the torque wrench rotates to directly measure the torsion torque corresponding to the torsion angle.

[0037] The above scheme limits the Z, X and Y degrees of freedom of the torsion bar through the middle support and the side, and fixes the two ends of the torsion bar to the torsion part. The torque is applied by the torque wrench to rotate the torsion bar to produce a corresponding rotation angle, and the torsion torque of the torque wrench is recorded. The device can directly measure the torsion torque of the torsion bar without complicated calculations. The measurement is simple and the results are easier to obtain. Compared with the indirect measurement method, the measurement operation of the present invention is simple, the results are intuitive, the cost is low, less manpower is required, and the economy is good.

[0038] In a specific embodiment of the present invention, see the attached Figure 1-5 The mounting seat is a plate-shaped base 15, in which a middle hole 151 for mounting the middle support and a middle support fixing hole 154 are opened in the middle; a plurality of connecting holes 152 are opened on both sides corresponding to the side supports, and the plurality of connecting holes 152 are positioned by a first pin 14, and the middle support and the base 15 are fixed by a first screw 13.

[0039] Advantageously, a weight-reducing groove 153 is provided on the base 15 .

[0040] Advantageously, in the embodiments of the present invention, see the attached Figure 4 and 7The middle support is a columnar support seat 8, and the downward protruding part 81 on its bottom surface is matched with the middle support fixing hole 154 for installation, and its bottom plane is fixed to the base 15 by pins or the like; a downwardly concave transverse groove 82 is provided on its top, and the transverse groove 82 carries a transverse plate 5 extending to both sides and close to the two torsion parts, and the transverse plate 5 is fixed to the bottom of the transverse groove 82 (it can be positioned by a second pin 7 and fixed by a second screw 6), and carries the torsion strip thereon; the groove walls 83 on both sides of the transverse groove 82 are provided with corresponding Z-direction limit holes 84 according to the center hole of the torsion strip, and are fixed by a long pin 18 penetrating the Z-direction limit hole 84 and the center hole of the torsion strip.

[0041] In order to facilitate fixing, a fixing plane 85 is formed on the outer wall of the groove wall 83 .

[0042] More specifically, see Appendix Figure 6 The side support can be an arc-shaped support plate 1, the bottom surface of which is fixed to the base 15 (the bottom of the arc-shaped support plate has a positioning hole 104 for positioning with the first pin 14 and a threaded hole 105 for fixing with the first screw 13), and a bearing hole 101 is opened in the horizontal direction on the top thereof, and is rotatably connected to the torsion part through a deep groove ball bearing 2; the lower part of the bearing hole 101 has a pin hole 102 and a limit pin hole 103. The deep groove ball bearing 2 is clamped in the bearing hole 101 through a retaining ring 19 to prevent it from falling off.

[0043] See attached Figure 8 and 9 The torsion part is an asymmetrical torsion block 3, which includes a plate-shaped torsion body 31. A support fixing platform 32 is provided on the torsion body 31 near the middle support side. The support fixing platform 32 fixes the end of the torsion strip, and its width is greater than or equal to the end width of the torsion strip; a cylindrical platform 33 is provided on the side of the torsion body 31 away from the support fixing platform 32 corresponding to the torsion strip, and a square rotating hole 331 is located in the cylindrical platform 33 and passes through the upper part of the torsion body 31; the lower part of the torsion body 31 has a body positioning pin hole 311 and a torsion strip hole 312.

[0044] See attached Figure 1 The cylindrical platform 33 is inserted into the bearing hole 101, so that the end face of the torsion body 31 fits with the arc support plate 1, and the support fixing platform 32 is vertically provided with a fixing hole 321 at the end of the torsion bar, which is positioned and fixed by the positioning pin 4; the main body positioning pin hole 311 at the lower part of the torsion body 31 corresponds to the pin hole 102, and is positioned by the pin 9, and the torsion long strip hole 312 corresponds to the limit pin hole 103, and is temporarily fixed by the limit pin 11 and the nut 12.

[0045] Advantageously, see Appendix Figure 3 The stop pin 11 is limited by the pin 10 to prevent the stop pin 11 from rotating during the torque measurement process. The latch 9, the stop pin 11, the nut 12 and the pin 10 are the locking parts.

[0046] The present invention provides a method for using the above-mentioned device for measuring the torsion torque of a helicopter torsion strip, comprising the following steps:

[0047] S1. Install the torsion bar, fix the middle part of the torsion bar on the middle support to limit the Z-direction freedom of the torsion bar; fix the two ends of the torsion bar on the torsion part to limit the X-direction freedom and Y-direction freedom of the torsion bar;

[0048] S2. Measurement: first position the locking part to ensure that the torsion angle a is 0°; insert the torque wrench into the rotating hole, and under the premise of ensuring that the device is in the initial state, cancel the positioning of the locking part, and turn the torque wrench to drive the torsion part to rotate; measure the maximum torque when the torsion angle a of the torsion bar is between 0°-15° and -15°-0°; when measuring the torque, it is necessary to tighten the side support and the torsion part, keep the torsion angle unchanged, and read the value on the torque wrench.

[0049] Specifically,

[0050] In S1, the torsion bar is placed on the support fixing platform 32 and the transverse plate 5 of the torsion block. A long pin 18 is passed through the center hole of the torsion bar and fixed by a long pin nut 16 and a limit sleeve 17 to limit its Z-direction freedom. The positioning pin 4 is inserted into the positioning holes on both sides of the torsion condition to limit the X and Y-direction freedom.

[0051] In S2, first insert the pin 9 into the main body positioning pin hole 311 and the pin hole to fix the torsion angle at 0°. Insert the torque wrench into the rectangular rotating hole 331 to ensure that the device is in the initial state. Remove the pin 9 and turn the torque wrench to drive the torsion block 3 to rotate. Measure the maximum torque of the torsion bar between 0°-15° and -15°-0°. When measuring the torque, tighten the nut 12 to lock the torsion block 3, keep the angle unchanged, and then read the value on the torque wrench. Repeat several times to measure the torque value of each angle.

[0052] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0053] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A device for measuring the torsion torque of a helicopter torsion bar, characterized in that: include: A mounting seat, wherein a support area is formed on the upper portion of the mounting seat, wherein the support area has a middle support located in the middle and side supports symmetrically arranged on both sides, wherein the middle support limits the Z-direction freedom of the torsion bar; The torsion part is rotatably connected to the side support, the rotation angle a is the torsion angle of the loading force, and the torsion part fixes the two ends of the torsion bar, becomes one with the torsion bar, and limits the X-direction and Y-direction degrees of freedom of the torsion bar; the torsion part is provided with a rotation hole for a torque wrench; and a locking portion, wherein the locking portion locks the torsion portion and the side support, and the torque wrench is rotated to directly measure the torsion torque corresponding to the torsion angle.

2. The device for measuring the torsion torque of a helicopter torsion strip according to claim 1, characterized in that: The mounting seat is a plate-shaped base (15), the center of which is provided with a middle hole (151) for mounting the middle support and a middle support fixing hole (154); and two sides thereof are provided with a plurality of connection holes (152) corresponding to the side supports.

3. The device for measuring the torsion torque of a helicopter torsion strip according to claim 2, characterized in that: The base (15) is provided with a weight-reducing groove (153).

4. The device for measuring the torsion torque of a helicopter torsion strip according to claim 2, characterized in that: The middle support is a columnar support seat (8), the downward protruding part (81) on its bottom surface is matched with the middle support fixing hole (154) for installation, and its bottom plane is fixed to the base (15); a downwardly concave transverse groove (82) is opened on its top, and the transverse groove (82) carries a transverse plate (5) extending to both sides and close to the two torsion parts, and the transverse plate (5) is fixed to the bottom of the transverse groove (82) and carries the torsion bar thereon; the groove walls (83) on both sides of the transverse groove (82) are provided with corresponding Z-direction limiting holes (84) according to the center hole of the torsion bar, and are fixed by a long pin (18) penetrating the Z-direction limiting hole (84) and the center hole of the torsion bar.

5. The device for measuring the torsion torque of a helicopter torsion strip according to claim 4, characterized in that: A fixing plane (85) is formed on the outer wall of the groove wall (83).

6. The device for measuring the torsion torque of a helicopter torsion bar according to claim 2, characterized in that: The side support adopts an arc-shaped support plate (1), the bottom surface of which is fixed to the base (15), and a bearing hole (101) is opened in the horizontal direction on the top of the arc-shaped support plate, and is rotatably connected to the torsion part through a deep groove ball bearing (2); the lower part of the bearing hole (101) has a pin hole (102) and a limit pin hole (103).

7. The device for measuring the torsion torque of a helicopter torsion strip according to claim 6, characterized in that: The twisting part is an asymmetrically shaped twisting block (3), and the twisting block (3) includes a plate-shaped twisting body (31). A support fixing platform (32) is provided on the twisting body (31) near the middle support side, and the support fixing platform (32) fixes the end of the twisting strip; a cylindrical platform (33) is provided on the side of the twisting body (31) away from the support fixing platform (32) corresponding to the twisting strip, and a square rotating hole (331) is located in the cylindrical platform (33) and passes through the upper part of the twisting body (31); the lower part of the twisting body (31) is provided with a body positioning pin hole (311) and a twisting strip hole (312).

8. The device for measuring the torsion torque of a helicopter torsion strip according to claim 7, characterized in that: The cylindrical platform (33) is inserted into the bearing hole (101) so that the end face of the torsion body (31) fits with the arc-shaped support plate (1); the support fixing platform (32) is vertically provided with a torsion bar end fixing hole (321), which is positioned and fixed by a positioning pin (4); the main body positioning pin hole (311) at the lower part of the torsion body (31) corresponds to the pin hole (102) and is positioned by a pin (9); the torsion strip hole (312) corresponds to the limit pin hole (103) and is temporarily fixed by a limit pin (11) and a nut (12).

9. The device for measuring the torsion torque of a helicopter torsion strip according to claim 8, characterized in that: The limiting pin (11) is externally limited by a pin (10), wherein the latch pin (9), the limiting pin (11), the nut (12) and the pin (10) constitute the locking portion.

10. A method for measuring the torsion torque of a helicopter torsion strip using the device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Install the torsion bar, fix the middle part of the torsion bar on the middle support to limit the Z-direction freedom of the torsion bar; fix the two ends of the torsion bar on the torsion part to limit the X-direction freedom and Y-direction freedom of the torsion bar; S2. Measurement: first position the locking part to ensure that the torsion angle a is 0°; insert the torque wrench into the rotating hole, and under the premise of ensuring that the device is in the initial state, cancel the positioning of the locking part, and turn the torque wrench to drive the torsion part to rotate; measure the maximum torque when the torsion angle a of the torsion bar is between 0°-15° and -15°-0°; when measuring the torque, it is necessary to tighten the side support and the torsion part, keep the torsion angle unchanged, and read the value on the torque wrench.

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