Planetary gear speed reduction assembly for measuring high rotating speed torque of air turbine starter

Abstract

The utility model relates to the technical field of air turbine starter testing, in particular to a planetary gear reduction assembly for measuring high-speed torque of an air turbine starter, which comprises an output flange, a reduction gearbox and an input flange which are sequentially and concentrically connected through a first clamp and a positioning pin. The other end of the input flange is concentrically connected with a rotating speed and torque sensor shell through a first hoop and a positioning pin, a rotating speed and torque sensor is arranged outside the rotating speed and torque sensor shell, and an input shaft is embedded and suspended in the rotating speed and torque sensor shell; one end of the input shaft is connected with the expansion sleeve conical shaft, and the other end of the input shaft is connected with a starter output shaft. According to the utility model, the transmission loss is effectively reduced, the transmission efficiency is improved, and the real-time rotating speed and torque of the high-rotating-speed starter are accurately measured; the complexity of parts is effectively reduced, and the overall structure is simplified.

Description

TECHNICAL FIELD

[0001] The utility model relates to air turbine starter test technical field, concretely is a kind of planetary gear reduction assembly for measuring air turbine starter high speed torque. BACKGROUND

[0002] Air turbine starter is one of important components of aircraft engine, its working principle is through high-pressure gas in engine pipeline to drive starter internal turbine rotor high-speed rotation, and transmission to starter and engine internal mechanism connection's output shaft according to proportion, reach the required speed and torque of engine starting.

[0003] When starter is detached from engine and is tested off-site, output shaft speed and torque need to be monitored and measured in real time, and the highest speed and torque can reach 12000rpm and 150Nm respectively. The combination of the existing planetary gear reducer and speed torque sensor on the market has the following problems: inaccurate measurement results, low transmission efficiency, complex structure and cumbersome operation, so it cannot simultaneously meet the speed limit of test bench and the requirement of real-time and accurate measurement of speed and torque. UTILITARIAN CONTENT

[0004] To solve the above technical problems, the utility model provides a kind of planetary gear reduction assembly for measuring air turbine starter high speed torque.

[0005] The technical problem to be solved by the utility model is realized by the following technical scheme:

[0006] A kind of planetary gear reduction assembly for measuring air turbine starter high speed torque, including output flange, reduction box, input flange, output planet carrier being arranged in the output flange, reduction mechanism being arranged in the reduction box, the output flange, reduction box, input flange are sequentially concentrically connected by first clamp and positioning pin, and the reduction mechanism includes sun gear shaft and planetary gear shaft, the output planet carrier is connected with the planetary gear shaft on the reduction mechanism, and the sun gear shaft on the reduction mechanism extends into the input flange and is concentrically connected with expansion sleeve conical shaft;

[0007] Another end of the input flange is concentrically connected with speed torque sensor shell by first clamp and positioning pin, the outside of the speed torque sensor shell is provided with speed torque sensor, and the inside of the speed torque sensor shell is embedded with input shaft, one end of the input shaft is connected with the expansion sleeve conical shaft, and the other end of the input shaft is connected with starter output shaft.

[0008] As a further improvement of the utility model, the other end of the input shaft is concentrically provided with internal spline interface for connecting with starter output shaft.

[0009] As a further improvement of the utility model, the other end of the rotating speed torque sensor shell is provided with a second clamp for connecting with the starter.

[0010] As a further improvement of the utility model, the input shaft is connected with the expansion sleeve conical shaft through bolts.

[0011] As a further improvement of the utility model, the expansion sleeve conical shaft is a hollow shaft structure.

[0012] As a further improvement of the utility model, the expansion sleeve conical shaft is provided with an expansion sleeve conical sleeve outside, and the expansion sleeve conical shaft is fixedly connected on the sun gear shaft through the expansion sleeve conical sleeve.

[0013] The utility model has the advantages of:

[0014] The utility model provides a kind of planetary gear reduction assembly for measuring high rotating speed torque of air turbine starter, by the combination use of traditional shaft connection type is changed into non-contact sensor and reduction box, effectively reduce transmission loss, improve transmission efficiency, and realize accurate measurement high rotating speed starter real-time rotating speed and torque;By the integrated design manufacturing thought of sensor end (input end) and reduction box end (output end), effectively reduce the complexity of parts, simplify overall structure, compared with the volume of traditional sensor reduction box combination smaller, lighter, facilitate worker operation. BRIEF DESCRIPTION OF DRAWINGS

[0015] The utility model is further described below in connection with drawings and embodiment:

[0016] Fig. 1 It is external structure schematic diagram of the utility model;

[0017] Fig. 2 It is overall cross section structure schematic diagram of the utility model;

[0018] Fig. 3 It is internal structure schematic diagram of the utility model.

[0019] In the drawing: 1, output planet carrier;2, output flange;3, reduction box;4, input flange;5, expansion sleeve conical sleeve;6, expansion sleeve conical shaft;7, input shaft;8, rotating speed torque sensor;9, first clamp;10, second clamp;11, bolt;12, internal spline interface;13, sun gear shaft;14, positioning pin;15, rotating speed torque sensor shell;16, planetary gear shaft. DETAILED DESCRIPTION

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] like Figs. 1 to 3 As shown, a planetary gear reduction assembly for measuring the high-speed torque of an air turbine starter has an overall weight of no more than 28 kg and a length of no more than 350 mm. It mainly includes an output planetary carrier 1, an output flange 2, a reduction gearbox 3, an input flange 4, a shrinking sleeve cone sleeve 5, a shrinking sleeve cone shaft 6, an input shaft 7, a speed and torque sensor 8, and a speed and torque sensor housing 15.

[0022] The output planetary carrier 1 is disposed inside the output flange 2. The output flange 2, reduction gearbox 3, input flange 4, and speed / torque sensor housing 15 are concentrically connected in sequence via a first clamp 9 and a positioning pin 14. The reduction gearbox 3 is made of hard aluminum and stainless steel. The reduction gearbox 3 has a reduction mechanism inside, which consists of a sun gear, three planet gears, and a corresponding sun gear shaft 13 and three planet gear shafts 16. The planet gear shafts 16 in the reduction mechanism are connected to the output planetary carrier 1. The sun gear shaft 13 in the reduction mechanism extends into the input flange 4 and cooperates with the input flange 4 through a bearing. The expansion sleeve conical shaft 6 is installed in the expansion sleeve conical sleeve 5. The expansion sleeve conical shaft 6 is a hollow shaft structure, and the sun gear shaft 13 in the reduction mechanism is inserted into the expansion sleeve conical shaft 6. The input shaft 7 is internally suspended inside the speed and torque sensor housing 15. One end of the input shaft 7 is connected to the expansion sleeve tapered shaft 6 by bolts 11, and the other end of the input shaft 7 is provided with an internal spline interface 12, which is connected to the starter output shaft. The speed and torque sensor 8 is disposed outside the speed and torque sensor housing 15; a second clamp 10 is provided on the other end of the speed and torque sensor housing 15, which is connected to the starter motor.

[0023] Working principle and usage process of this utility model:

[0024] In use, the starter output shaft is connected to the internal spline interface 12 on the input shaft 7. The other end of the input shaft 7 is connected to the expansion sleeve conical shaft 6 with bolts 11. The expansion sleeve conical shaft 6 is installed in the expansion sleeve conical sleeve 5. The sun gear shaft 13 on the reduction mechanism inside the gearbox 3 is inserted into the expansion sleeve conical shaft 6. At this point, the product speed is transmitted from the input shaft 7 to the gearbox 3. After the speed is reduced by a 4 / 1 reduction ratio under the action of the sun gear and three planetary gears in the reduction mechanism, it is connected to the output planetary carrier 1 through the three planetary gear shafts 16 and outputs the final speed.

[0025] The utility model improves signal receiving mode of sensor, changes from traditional axle connection type to non-contact type rotation speed torque sensor (input end), has reduced the wear and tear of product work time, has improved transmission efficiency and the accuracy of measurement result, torque test range can reach 200Nm, rotation speed test range can reach above 15000rpm.

[0026] The basic principle, main features and advantages of the utility model are shown and described above. Those skilled in the art should understand that the utility model is not limited by the above examples, and the above examples and descriptions in the specification are only the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model can have various changes and improvements, and these changes and improvements fall within the scope of the claimed utility model. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A planetary gear reduction assembly for measuring high speed torque of an air turbine starter, comprising an output flange (2), a reduction box (3), an input flange (4), an output planet carrier (1) arranged inside the output flange (2), a reduction mechanism arranged inside the reduction box (3), the output flange (2), the reduction box (3), and the input flange (4) being connected in sequence and concentrically by a first clamp (9) and a positioning pin (14), the reduction mechanism comprising a sun gear shaft (13) and a planetary gear shaft (16), the output planet carrier (1) being connected with the planetary gear shaft (16) of the reduction mechanism, the sun gear shaft (13) of the reduction mechanism extending into the input flange (4) and being connected concentrically with a expansion sleeve conical shaft (6); characterized in that the other end of the input flange (4) being connected concentrically with a speed torque sensor shell (15) by the first clamp (9) and the positioning pin (14), the speed torque sensor shell (15) being provided externally with a speed torque sensor (8), the speed torque sensor shell (15) being internally embedded with a input shaft (7) in suspension, one end of the input shaft (7) being connected with the expansion sleeve conical shaft (6), the other end of the input shaft (7) being connected with a starter output shaft.

2. A planetary gear reduction assembly for measuring high speed torque of an air turbine starter as defined in claim 1 wherein: the other end of the input shaft (7) being provided concentrically with an internal spline interface (12) for connecting with the starter output shaft.

3. A planetary gear reduction assembly for measuring high speed torque of an air turbine starter as defined in claim 1 wherein: the other end of the speed torque sensor shell (15) being provided with a second clamp (10) for connecting with the starter.

4. A planetary gear reduction assembly for measuring high speed torque of an air turbine starter as defined in Claim 1 wherein: the input shaft (7) being connected with the expansion sleeve conical shaft (6) by a bolt (11).

5. A planetary gear reduction assembly for measuring high speed torque of an air turbine starter as defined in claim 1 wherein: the expansion sleeve conical shaft (6) being a hollow shaft structure.

6. A planetary gear reduction assembly for measuring high speed torque of an air turbine starter as defined in Claim 1 wherein: the expansion sleeve conical shaft (6) being provided externally with an expansion sleeve conical sleeve (5), the expansion sleeve conical shaft (6) being fixedly connected with the sun gear shaft (13) by the expansion sleeve conical sleeve (5).

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