CN113716064A - Support tool for reverse thrust of aircraft engine and traction method for out-of-position engine - Google Patents

Abstract

The invention discloses a supporting tool for reverse thrust of an aircraft engine and a traction method for the out-of-place engine, wherein the supporting tool comprises: the supporting assembly comprises a front supporting disc, a rear supporting disc and a supporting frame for connecting the front supporting disc and the rear supporting disc; the supporting tool also comprises a movable underframe which comprises an underframe frame, wherein the lower part of the underframe frame is provided with a jacking mechanism, and the bottom of the underframe frame is provided with trundles; the supporting tool further comprises a lifting bracket which comprises a bracket frame matched with the supporting frame of the supporting assembly, the bracket frame is provided with a concave part capable of nesting and placing the supporting frame, the lifting bracket is placed on the movable underframe, and the lifting bracket is controlled to ascend and descend by the jacking mechanism. The invention can improve the working efficiency of airplane traction when the engine is not in place and reduce the maintenance risk of the airplane.

Description

Support tool for reverse thrust of aircraft engine and traction method for out-of-position engine

Technical Field

The invention relates to the technical field of aircraft maintenance, in particular to a supporting tool for reverse thrust of an aircraft engine and a traction method for an out-of-place engine.

Background

As shown in fig. 1, the engine 1 is frequently required to be detached during the scheduled inspection or special maintenance work of the airplane, and when the airplane maintenance station is in short supply, or when a garage position with a dock or a parking station used by an airline for special maintenance tasks is required, or when the airplane is parked at a parking station which blocks the towing of other airplane maintenance, the airplane with the engine out of position needs to be towed to other parking positions.

When the engine is in place, the reverse thrust 2 is in locking connection with the engine 1 and then drags the airplane, the vibration and the maneuvering force of the reverse thrust 2 are generally transmitted to the engine body through the V-shaped groove to be borne, and then are transmitted to an engine lifting point structure with enough mechanical strength at the position of an airplane hanger through the engine. If the engine drags the airplane when not in place, the vibration and the power of the reverse thrust 2 can be directly transmitted to the reverse thrust hinge on the hanger to be borne, and the design strength of the reverse thrust hinge can not bear the large acting force, so that the structural damage is very easy to cause.

Therefore, according to the existing airplane maintenance manual, the following two operation modes exist for dragging the airplane:

1. when the engine 1 is in place, the reverse thrust 2 is put down and locked, and the vibration and the power of the reverse thrust 2 can be transmitted to a force bearing structure by the engine;

2. when the engine 1 is not in place, the reverse thrust 2 needs to be detached to drag the airplane, so that the stress damage of the reverse thrust hinge is avoided.

However, when the engine 1 is not in place, the aircraft is dragged, the reverse thrust 2 is firstly detached, and then the reverse thrust is installed after the aircraft is moved to the target position, which is a complex assembly and disassembly process, and takes a long time, taking the reverse thrust assembly and disassembly of the airbus a330 aircraft as an example, the reverse thrust time for detaching and installing the left side and the right side of one engine is about 4 people × 16 hours, which is 64 hours, and the assembly and disassembly of the reverse thrust also increases the risk of maintenance of the aircraft.

Disclosure of Invention

The invention aims to provide a support tool for reverse thrust of an aircraft engine, and the other aim of the invention is to provide an aircraft traction method using the support tool when the engine is not in place, which can improve the working efficiency of aircraft traction and reduce the maintenance risk of the aircraft.

One of the objects of the present invention is achieved by the following technical solution,

a support tool for the thrust reversal of an aircraft engine, comprising:

the supporting assembly comprises a front supporting disc, a rear supporting disc and a supporting frame for connecting the front supporting disc and the rear supporting disc, a front lifting point support and a rear lifting point support which are used for being connected with an engine lifting point are arranged on the supporting frame, and the front supporting disc and the rear supporting disc can be connected with the thrust reverser in a matching manner;

the movable underframe comprises an underframe frame, the lower part of the underframe frame is provided with a jacking mechanism, and the bottom of the underframe frame is provided with trundles;

the lifting bracket comprises a bracket frame matched with the supporting frame of the supporting assembly, the bracket frame is provided with a concave part capable of nesting and placing the supporting frame, the lifting bracket is placed on the movable underframe, and the lifting and descending of the lifting bracket are controlled through the jacking mechanism.

Preferably, the movable underframe is further provided with a height adjusting supporting leg, and after the movable underframe is fixed, the height and the level of the movable underframe can be adjusted.

The upper end of the jacking mechanism of the movable underframe is provided with a lifting platform, and the bracket frame of the lifting bracket is placed on the lifting platform.

And a lifting auxiliary wheel is arranged between the movable underframe and the lifting bracket in the longitudinal direction, plays a role in guiding and side supporting in the process that the lifting bracket lifts up and down relative to the movable underframe, and can be respectively arranged on the lifting bracket and the movable underframe.

Preferably, the jacking mechanism is a scissor-type jacking mechanism driven by a hydraulic actuator cylinder.

And the front support disc and/or the rear support disc are/is connected with a front and rear adjusting screw rod.

The second technical scheme of the invention is as follows:

the traction method with the out-of-place engine adopts the supporting tool for the reverse thrust of the aircraft engine, and comprises the following steps,

s1: opening an aircraft engine for reverse thrust;

s2: the lifting bracket is placed on the movable underframe, the supporting component is placed on the lifting bracket, and then the supporting component and the lifting bracket are moved together to the position below the reverse thrust;

s3: jacking the lifting bracket and the supporting assembly to a proper height through a jacking mechanism, so that a front lifting point support and a rear lifting point support of the supporting assembly are matched with the position of an engine lifting point;

s4: fixedly connecting the front hoisting point bracket and the rear hoisting point bracket to the engine hoisting point through a connecting screw rod;

s5: the supporting assembly is separated from the lifting bracket, and the jacking mechanism descends to enable the lifting bracket to descend to the original height;

s6: removing the lifting carriage and the movable chassis from under the reverse thrust;

s7: putting down the reverse thrust to enable the front supporting disc and the rear supporting disc of the supporting assembly to be connected with the reverse thrust in a matching mode, and closing the reverse thrust according to the maintenance requirement of the airplane;

s8: and after the supporting component is installed, the airplane is normally towed.

The invention has the following advantages:

1. the invention provides a special supporting tool for reverse thrust of an engine, and under the condition that the aircraft needs to be dragged when the engine is detached, namely the engine is not in place, the vibration and the power of the reverse thrust can be transmitted to an engine lifting point through a supporting assembly, so that the condition of moving the aircraft is met, and the reverse thrust does not need to be detached. The expected working hours for dismounting the whole bracket are 4 multiplied by 2 to 8, and the working hours for dismounting and mounting the left and right sides of one engine to reversely push the wrapper are 4 multiplied by 16 to 64, so that the efficiency is improved by 7 times.

2. The invention greatly improves the flexibility of adjusting and allocating the airplane maintenance positions when the engines are not in place, so that the limited maintenance positions can be used for maintenance of more airplanes, and the benefit of airplane maintenance companies is improved.

3. The invention greatly reduces the safety risk brought by dismounting and reversely pushing. The function of the thrust reversal system on the aircraft is to reverse the thrust flow of the engine after the aircraft lands so that the aircraft can have sufficient deceleration on the runway. If the reverse thrust is lacked during landing, the landing distance of the airplane is greatly prolonged, and the airplane possibly rushes out of the runway. If the air is pushed back and accidentally discharged, the airplane can crash. The thrust reversal disassembly and assembly and the later adjustment test are complex work, and besides a large amount of manpower and time are consumed, the damage of parts and the errors of installation and adjustment are easily caused, so that the fault on the thrust reversal function is caused, and the safety of the operation of the airplane is influenced. Therefore, the design can enable the engine to tow the airplane without being in place, and meanwhile, the reverse thrust is not needed to be disassembled and assembled, so that the safety risk of the airplane is greatly reduced.

Drawings

The invention is described in further detail below with reference to the following figures and specific examples:

FIG. 1 is a schematic view of an engine and thrust reverser installation configuration when an aircraft engine is in position;

FIG. 2 is a perspective view of a support tool for the thrust reversal of an aircraft engine according to the present invention;

FIG. 3 is a front view of the support tool of FIG. 2;

FIG. 4 is a perspective view of the support assembly;

FIG. 5 is a perspective view of the movable chassis;

FIG. 6 is a perspective view of the lifting bracket;

description of reference numerals:

1. an engine; 2. performing reverse thrust; 3. a reverse thrust hydraulic actuator cylinder; 4. a support assembly; 5. a movable chassis; 6. a lifting bracket; 7. a front support disc; 8. a rear support disc; 9. adjusting the screw rod; 10. height adjusting support legs; 11. a front suspension point support; 12. a front screw hole; 13. a rear hoisting point support; 14. a rear screw hole; 15. a jacking mechanism hydraulic actuator cylinder; 16. a support frame; 17. an underframe frame; 18. a first lifting auxiliary wheel; 19. a jacking mechanism; 20. a caster wheel; 21. a second lifting auxiliary wheel; 22. a bracket frame.

Detailed Description

As shown in fig. 1 to 6, a support tool for reverse thrust of an aircraft engine comprises

The supporting assembly 4 comprises a front supporting disc 7, a rear supporting disc 8 and a supporting frame 16 for connecting the front supporting disc 7 and the rear supporting disc 8, wherein a front lifting point support 11 and a rear lifting point support 13 for connecting with an engine lifting point are arranged on the supporting frame 16, and the front supporting disc 7 and the rear supporting disc 8 can be connected with the thrust reverser 2 in a matching manner;

the movable underframe 5 comprises an underframe frame 17, a jacking mechanism 19 is arranged at the lower part of the underframe frame 17, a caster 20 is arranged at the bottom of the underframe frame 20, and specifically, a first lifting auxiliary wheel 18 is also arranged in the longitudinal direction of the underframe frame 17;

the lifting bracket 6 comprises a bracket frame 22 matched with the supporting frame 16 of the supporting assembly 4, the bracket frame 22 is provided with a concave part capable of nesting and placing the supporting frame 16, the lifting bracket 6 is placed on the movable underframe 5, the lifting and descending of the lifting bracket 6 are controlled through a jacking mechanism 19, and specifically, a second lifting auxiliary wheel 21 is further arranged in the longitudinal direction of the bracket frame 22.

Namely, the lifting auxiliary wheels are respectively arranged on the lifting bracket and the movable underframe, and the lifting bracket plays a role in guiding and side supporting in the up-and-down lifting process relative to the movable underframe.

As a preferred embodiment:

the movable chassis 5 is further provided with height-adjusting support legs 10, which can adjust the height and level of the movable chassis 5 after the movable chassis 5 is fixed.

At the upper end of the lifting mechanism 19 of the movable base frame 5 is a lifting platform on which the carriage frame 22 of the lifting carriage 6 rests.

The jack 19 is a scissor jack driven by a jack hydraulic actuator 15.

The front supporting disk 7 and/or the rear supporting disk 8 are/is connected with a front and rear adjusting screw rod 9.

The traction method with the out-of-place engine adopts the supporting tool for the reverse thrust of the aircraft engine, and comprises the following steps,

s1: the reverse thrust 2 of the aircraft engine is opened, and the opening and closing of the reverse thrust can be controlled through the reverse thrust hydraulic actuator cylinder 3;

s2: the lifting bracket 6 is placed on the movable chassis 5, the supporting component 4 is placed on the lifting bracket 6, and then the supporting component and the lifting bracket are moved together to the position below the reverse thrust 2;

s3: the lifting bracket 6 and the supporting component 4 are jacked up to a proper height through the jacking mechanism 9, so that the front lifting point support 11 and the rear lifting point support 13 of the supporting component 4 are matched with the position of an engine lifting point, and when the positions of the front lifting point support 11 and the rear lifting point support 13 are slightly different from the matching of the position of the engine lifting point, the inclination angle and the horizontal position of the supporting component 4 can be finely adjusted through the matching of the height adjusting supporting foot 10 and the adjusting screw rod 9, so that the front lifting point support 11 and the rear lifting point support 13 can be matched with the position of the engine lifting point;

s4: the front lifting point support 11 and the rear lifting point support 13 are fixedly connected to the engine lifting point through a connecting screw, specifically, a front screw hole 12 is formed in the front lifting point support 11, and a rear screw hole 14 is formed in the rear lifting point support 13, so that the support assembly 4 is fixedly connected with the screw of the engine lifting point;

s5: the supporting component 4 is separated from the lifting bracket 6, and the jacking mechanism 19 descends to enable the lifting bracket 6 to descend to the original height;

s6: the lifting carriage 6 and the movable chassis 5 are removed from under the thrust reverser 2;

s7: the reverse thrust 2 is put down, so that a front support circular disc 7 and a rear support circular disc 8 of the support assembly 4 are connected with the reverse thrust 2 in a matching way, and the reverse thrust is closed according to the maintenance requirement of the airplane;

s8: after the supporting component 4 is installed, the airplane is normally towed. The reverse thrust vibration and power transmission mode in the traction process are the same as that of the engine in position.

The above-described embodiments of the present invention are not intended to limit the scope of the present invention, and the embodiments of the present invention are not limited thereto, and various other modifications, substitutions and alterations can be made to the above-described structure of the present invention without departing from the basic technical concept of the present invention as described above, according to the common technical knowledge and conventional means in the field of the present invention.

Claims (7)

1. A support tool for thrust reversals of an aircraft engine, comprising:

the supporting assembly comprises a front supporting disc, a rear supporting disc and a supporting frame for connecting the front supporting disc and the rear supporting disc, a front lifting point support and a rear lifting point support which are used for being connected with an engine lifting point are arranged on the supporting frame, and the front supporting disc and the rear supporting disc can be connected with the thrust reverser in a matching manner;

the movable underframe comprises an underframe frame, the lower part of the underframe frame is provided with a jacking mechanism, and the bottom of the underframe frame is provided with trundles;

the lifting bracket comprises a bracket frame matched with the supporting frame of the supporting assembly, the bracket frame is provided with a concave part capable of nesting and placing the supporting frame, the lifting bracket is placed on the movable underframe, and the lifting and descending of the lifting bracket are controlled through the jacking mechanism.

2. A support tool for the thrust reversal of an aircraft engine as claimed in claim 1, wherein: the movable underframe is also provided with a height adjusting supporting leg.

3. A support tool for the thrust reversal of an aircraft engine as claimed in claim 2, characterized in that: the upper end of the jacking mechanism of the movable underframe is provided with a lifting platform, and the bracket frame of the lifting bracket is placed on the lifting platform.

4. A support tool for the thrust reversal of an aircraft engine as claimed in claim 3, characterized in that: and a lifting auxiliary wheel is arranged between the movable underframe and the lifting bracket in the longitudinal direction.

5. A support means for the thrust reversal of an aircraft engine as claimed in claim 3 or 4, characterized in that: the jacking mechanism is a scissor type jacking mechanism driven by a hydraulic actuator cylinder.

6. A support tool for the thrust reversal of an aircraft engine as claimed in claim 1, wherein: and the front support disc and/or the rear support disc are/is connected with a front and rear adjusting screw rod.

7. A traction method with an out-of-position engine is characterized in that: the traction method adopts the supporting tool for the reverse thrust of the aircraft engine of any one of claims 1 to 6, and comprises the following steps,

s1: opening an aircraft engine for reverse thrust;

s2: the lifting bracket is placed on the movable underframe, the supporting component is placed on the lifting bracket, and then the supporting component and the lifting bracket are moved together to the position below the reverse thrust;

s3: jacking the lifting bracket and the supporting assembly to a proper height through a jacking mechanism, so that a front lifting point support and a rear lifting point support of the supporting assembly are matched with the position of an engine lifting point;

s4: fixedly connecting the front hoisting point bracket and the rear hoisting point bracket to the engine hoisting point through a connecting screw rod;

s5: the supporting assembly is separated from the lifting bracket, and the jacking mechanism descends to enable the lifting bracket to descend to the original height;

s6: removing the lifting carriage and the movable chassis from under the reverse thrust;

s7: putting down the reverse thrust to enable the front supporting disc and the rear supporting disc of the supporting assembly to be connected with the reverse thrust in a matching mode, and closing the reverse thrust according to the maintenance requirement of the airplane;

s8: and after the supporting component is installed, the airplane is normally towed.

Images