CN210400669U - Helicopter main transmission shaft torque detection device - Google Patents
Helicopter main transmission shaft torque detection device Download PDFInfo
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- CN210400669U CN210400669U CN201921070513.4U CN201921070513U CN210400669U CN 210400669 U CN210400669 U CN 210400669U CN 201921070513 U CN201921070513 U CN 201921070513U CN 210400669 U CN210400669 U CN 210400669U
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Abstract
The utility model relates to a helicopter transmission shaft, in particular to helicopter main drive axle moment of torsion detection device. The torsion measuring disc (3) is fixed on the main transmission shaft (1) and transmits torque together; the torsion measuring shaft (2) is arranged in the main transmission shaft (1), the torsion measuring shaft (2) is kept still all the time, and the pointer disc (4) is fixed with the torsion measuring shaft (2); one end of the torque measuring shaft (2) is sleeved in the torque measuring mounting ring (5) in clearance fit, and the torque measuring mounting ring (5) is fixed on the torque measuring disc (3); it is characterized in that: a plurality of waist-shaped holes are formed in the pointer disc (4), the thickness of the pointer disc (4) is 1-2mm, and the distance between the pointer disc (4) and the torsion measuring disc (3) is 0.4-0.6 mm; the torsion measuring mounting ring (5) is provided with at least two annular grooves (6), the annular grooves are positioned at the joint surface of the torsion measuring shaft (2) and the torsion measuring mounting ring (5), and a lining is arranged in the annular grooves. A torque detection device which is stable in structure, safe and reliable is designed.
Description
Technical Field
The invention relates to a helicopter transmission shaft, in particular to a torque detection device for a helicopter main transmission shaft.
Background
The main transmission shaft is often used as a mechanical element for measuring the torque of the helicopter engine, and the torsional deformation of the main transmission shaft during the torque transmission reflects the torque of the engine during working.
A typical helicopter main drive shaft torque detection device is shown in FIG. 1 and is composed of a hand plate member and a torque measuring plate member. The torsion measuring disc is fixedly connected with a flange plate of the main transmission shaft through bolts, and the pointer disc is riveted on the torsion measuring shaft without transmitting torque. When the main transmission shaft transmits torque, the torsion measuring disc fixedly connected with the main transmission shaft transmits along with the shaft, and a torsion angle is generated relative to the pointer disc which does not transmit torque, so that a relative displacement is generated between the main transmission shaft and the pointer disc. The displacement is compared with the displacement in the 100% torque state, and the engine output torque at the displacement can be obtained.
Along with the increase of the operating time of the main transmission shaft, parts are slightly abraded, and the torsion measuring mounting ring is of a single supporting structure, so that the stability is poor, the flexibility of relative rotation of the pointer disc and the torsion measuring disc is influenced, the torque value of the torque detector is fluctuated, and the judgment of a pilot is influenced. There is a need for a torque sensor device that is structurally stable and accurately reflects the output torque of the engine.
Disclosure of Invention
The technical problems solved by the invention are as follows: the torque detector device is stable in structure, safe and reliable.
The technical scheme of the invention is as follows: the helicopter main transmission shaft torque detection device comprises a main transmission shaft, a torsion measuring disc, a pointer disc and a torsion measuring mounting ring, wherein the torsion measuring disc is fixed on the main transmission shaft and jointly transmits torque; the torsion measuring shaft is arranged in the main transmission shaft, the torsion measuring shaft is kept still all the time, and the pointer disc is fixed with the torsion measuring shaft;
one end of the torque measuring shaft is sleeved in the torque measuring mounting ring in clearance fit, and the torque measuring mounting ring is fixed on the torque measuring disc;
a plurality of waist-shaped holes are formed in the pointer disc, the thickness of the pointer disc is 1-2mm, and the distance between the pointer disc and the torsion measuring disc is 0.4-0.6 mm;
at least two annular grooves are arranged on the torsion measuring mounting ring, the annular grooves are positioned on the joint surface of the torsion measuring shaft and the torsion measuring mounting ring, and a lining is arranged in the annular grooves.
Preferably, the annular groove inner bushing is made of nylon materials. According to the technical scheme, partial vibration between the torsion measuring shaft and the torsion measuring disc can be eliminated, and the measurement precision of the torque detection device is further improved.
Preferably, the torsion axis has a surface roughness of less than 0.8. According to the technical scheme, the assembly of the torque measuring shaft can be facilitated, the rotation precision of the torque measuring mounting ring is improved, and the measurement precision of the torque detecting device is improved.
Drawings
FIG. 1 is a prior art torque detection device;
FIG. 2 is a structural view of a torque measuring mounting ring;
fig. 3 is a schematic view of the torque detection device according to the present embodiment.
Detailed Description
The helicopter main transmission shaft torque detection device is composed of a pointer disc 4, a torsion measuring disc 3, a torsion measuring shaft 2 and a torsion measuring mounting ring 5. One end of the torsion measuring shaft 2 is sleeved in the torsion measuring mounting ring 5 in clearance fit, and the torsion measuring mounting ring 5 is fixed on the torsion measuring disc 3. The torque measuring disc 3 is fixedly connected with a flange plate of the main transmission shaft 1 through bolts to transmit torque. And the pointer disk 4 is fixed on the torsion measuring shaft 2 through a rivet, and does not transmit torque. When the main transmission shaft 1 transmits torque, the torsion measuring disc 3 fixedly connected with the main transmission shaft transmits along with the shaft, and a torsion angle is generated relative to the pointer disc 4 which does not transmit torque, so that a relative displacement is generated between the two. The displacement is compared with the displacement in the 100% torque state, and the engine output torque at the displacement can be obtained. A plurality of waist-shaped holes are formed in the pointer disc 4, the pointer disc 4 is thin and only 1-2mm, and in order to guarantee the measurement accuracy of the torque detection device, through accumulation of a large amount of test data, the axial clearance between the torsion measurement disc 3 and the pointer disc is guaranteed to be 0.4-0.6 mm. The axial clearance value is selected, the influence of deformation factors of the pointer disc is considered, the mounting requirement of the whole platform is also considered, and axial interference is avoided. As shown in fig. 2, in order to improve the stability of the torque detecting device, 1 annular groove 6 is respectively processed at two ends of the joint surface of the torque measuring mounting ring 5. And a lining is arranged in the annular groove 6 and is made of nylon material. The nylon material selected in the technical scheme not only considers the strength requirement of the bushing, but also can eliminate the vibration between the torsion measuring shaft and the torsion measuring disc. In order to facilitate the installation of the 2 nylon bushings, the requirement of the roughness value of the matching surface of the torque measuring shaft 2 and the torque measuring mounting ring 5 is less than 0.8 in the technical scheme. Two nylon bush among the technical scheme play the slide bearing effect, have reduced the friction between the part, have improved torque detection device's rotation precision, avoid the torque detector torque value to appear undulant, influence pilot's judgement.
Claims (4)
1. The helicopter main transmission shaft torque detection device comprises a main transmission shaft (1), a torsion measuring shaft (2), a torsion measuring disc (3), a pointer disc (4) and a torsion measuring mounting ring (5), wherein the torsion measuring disc (3) is fixed on the main transmission shaft (1) and jointly transmits torque; the torsion measuring shaft (2) is arranged in the main transmission shaft (1), the torsion measuring shaft (2) is kept still all the time, and the pointer disc (4) is fixed with the torsion measuring shaft (2);
one end of the torque measuring shaft (2) is sleeved in the torque measuring mounting ring (5) in clearance fit, and the torque measuring mounting ring (5) is fixed on the torque measuring disc (3);
it is characterized in that: a plurality of waist-shaped holes are formed in the pointer disc (4);
the torsion measuring mounting ring (5) is provided with at least two annular grooves (6), the annular grooves are positioned at the joint surface of the torsion measuring shaft (2) and the torsion measuring mounting ring (5), and a lining is arranged in the annular grooves.
2. The helicopter main drive shaft torque detection device of claim 1, characterized by: the thickness of the pointer disc (4) is 1-2mm, and the distance between the pointer disc (4) and the torsion measuring disc (3) is 0.4-0.6 mm.
3. The helicopter main drive shaft torque detection device of claim 1, characterized by: the inner lining of the annular groove (6) is made of nylon material.
4. The helicopter main drive shaft torque detection device of claim 1, characterized by: the roughness of the matching surface of the torque measuring shaft (2) and the torque measuring mounting ring (5) is less than 0.8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921070513.4U CN210400669U (en) | 2019-07-09 | 2019-07-09 | Helicopter main transmission shaft torque detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921070513.4U CN210400669U (en) | 2019-07-09 | 2019-07-09 | Helicopter main transmission shaft torque detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210400669U true CN210400669U (en) | 2020-04-24 |
Family
ID=70353591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921070513.4U Active CN210400669U (en) | 2019-07-09 | 2019-07-09 | Helicopter main transmission shaft torque detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210400669U (en) |
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2019
- 2019-07-09 CN CN201921070513.4U patent/CN210400669U/en active Active
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