RU18091U1 - DEVICE FOR MOUNTING AIRCRAFT ENGINES - Google Patents

Abstract

An aircraft engine mounting device comprising an elastic vibration-absorbing element, characterized in that the mounting device is made in the form of a composite trunnion, the individual elements of which are connected using an elastic vibration-absorbing element made in the form of segments of a stainless steel steel rope, for example, grade 12X10H6T or the like.

Description

DEVICE FOR MOUNTING AIRCRAFT ENGINES.

The proposed utility model relates to the field of aeronautical engineering and transport, and can find practical application for mounting aircraft engines, compressors, and other rotor assemblies on aircraft, on surface and ground vehicles, and on stationary installations, for example, in electric train cars, gas pumping units, etc. .

The engine is mounted as part of an object, usually with the help of trunnions made of a high-strength steel bar (see G. Skubachevsky, “Aviation gas-turbine engines M. Mashrgaostroenie, pp. 45-52, 1969).

A general view of such a solid journal is shown in FIG. 1.

A solid all-metal trunnion, providing a rigid connection between the engine and the object, periodically practically without attenuation transfers mechanical loads (vibrations of the combustion process and from the imbalance of rotating parts) to the body of the object, and shock and vibration effects occurring at different flight modes (take-off and landing, shooting , turbulence of air flows, etc.) from the object to the engine.

Vibro-shock loads transmitted through the pins from the object to the engine or compressor reduce their service life, causing premature destruction of the turbine blades or bearings.

Vibrations from the compressor engine create uncomfortable conditions in the cabin or on the body of a moving object, adversely affecting the well-being of people and impairing the operation of instruments and equipment.

The closest invention essentially to the proposed utility model of the authors is the patent of Russia No. 1 713 302 C in class. 6F02C 7/06 published in Bul. No. 10 dated 04/10/95. “Device for limiting flex shaft deflection.

The specified device contains an elastic shock-absorbing liner, which softens the shock and reduces the amplitude of the vibration transmitted from the motor shaft to the body of the object.

The disadvantage of this device is that it shows its protective properties only in certain engine operating modes (at critical shaft revolutions) and does not protect the engine from vibration and coming from the object to the engine.

In order to weaken the mutual influence of the mechanical effects of engines, compressors of various rotor assemblies and the body of the object on top of each other, elastic fastening of power units to the object is proposed, consisting of composite trunnions with a vibration-absorbing insert (insert) between the trunnion parts.

A General view of the proposed trunnion is presented in Figure 2. the insert (vibration-absorbing insert) is a package drawn from pieces of steel rope (cable)

1- trunnion element (seat on the trunnion on the building)

2- trunnion element (trunnion seat in the engine housing)

3- elastic vibration-absorbing element of the journal (insert)

The device for mounting the aircraft engine operates as follows. When vibration acts on the pin element 2, the vibration is transmitted through the elastic insert 3 to the pin element 1. The scattering and absorption of vibrational energy occurs through the elastic liner 3.

Considering that the strength of the steel rope is higher than the strength of a steel rod of the same diameter, the introduction of an insert (insert 3) into the trunnion design will not reduce its strength, and due to the large internal friction of the cable insert, there is a greater efficiency of vibration damping due to intensive absorption (dispersion) of vibration energy.

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MKI: F02C7 / 06

Claims (1)

An aircraft engine mounting device comprising an elastic vibration-absorbing element, characterized in that the mounting device is made in the form of a composite trunnion, the individual elements of which are connected using an elastic vibration-absorbing element made in the form of segments of a stainless steel steel rope, for example, grade 12X10H6T or the like.