A planetary carrier assembly of an aircraft planetary gear reducer

Abstract

The invention discloses a planet carrier assembly of an aircraft planet gear reduction box, which comprises a planet carrier, wherein the planet carrier is a cantilever integral structure and comprises two side plates and a support structure; the two side plates are connected to form a hollow integral body through a plurality of connecting plates which are uniformly distributed on the circumference; one side of the support structure can be fixedly connected with an aircraft casing; the end surface of each connecting plate is provided with an axially perforated inclined groove; the top of each inclined groove is provided with a taper hole; the other side of the support structure is provided with an inclination side plate corresponding to each connecting plate; each inclination side plate is provided with a stepped hole; and each inclination side plate of the support structure is inserted into and fixedly connected with the corresponding inclined groove of the planet carrier through an axis pin which is inserted into the taper hole and stepped hole. The planet carrier assembly can greatly improve the problems of poor rigidity, great vibrations and over-restriction in connection when the planet carrier is in the cantilever state, and is more convenient to assemble. Meanwhile, the planet carrier assembly can lower the phenomenon of nonuniform loading of gear mesh, and enhance the reliability and service life of the planet gear transmission.

Description

technical field [0001] The invention belongs to the field of mechanical transmission equipment, in particular to a planet carrier assembly of an aircraft planetary gear reducer. Background technique [0002] In the turbofan engine of traditional civil aircraft, the fan is directly driven by the low-pressure turbine, and due to the limitation of strength and blade tip tangential speed, the fan speed is low, generally 4000-5500r / min, while the low-pressure turbine speed is relatively low. High, generally at 8000r / min, there is an obvious lack of efficiency matching, that is, the speed of the fan and the speed of the low-pressure turbine are not optimal. To solve this problem, Pratt & Whitney developed a gear-driven turbofan engine, which adds a planetary gear reduction device after the fan. [0003] The planetary carrier is a component with a relatively complicated structure in the planetary gear transmission. The structural design of the planetary carrier has a great influe...

AI Technical Summary

Problems solved by technology

[0004] The planetary carrier installed in the aircraft engine often adopts a cantilever integral structure due to the small space. However, if the support of the planetary carrier is not properly handled, the rigidity of the planetary carrier may be reduced, the vibration may be increased, and the uneven load between the gear meshes may be strengthened. , thereby greatly reducing the reliability and life of the planetary gear transmission

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