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CN-117963128-B - Crane sliding rail connecting structure of flat plate airtight door

CN117963128BCN 117963128 BCN117963128 BCN 117963128BCN-117963128-B

Abstract

The application belongs to the field of aviation structural strength design, and particularly relates to a crane sliding rail connecting structure of a flat plate airtight door. Through the rigid motion relation between 9 groups of hanger rail supports and the airtight door and hanger rail, hanger rail and hanger rail supports which do not bear the airtight load of the machine body are designed. The hanger rail support is divided into 3 sections for design, wherein the first section of variable-profile I-shaped hanger rail 10 adopts a design form of 1 fixed hanger rail support and 1 movable hanger rail support, the second section of constant-profile I-shaped hanger rail 11 adopts a design form of 1 fixed hanger rail support and 4 movable hanger rail supports, and the third section of constant-profile I-shaped hanger rail 12 adopts a design form of 1 fixed hanger rail support and 1 movable hanger rail support. According to the application, through the connection design relationship among the hanger rail, the hanger rail support and the flat plate airtight door, decoupling of the bearing load of the flat plate airtight door and the hanger rail under airtight load is realized, so that load transmission is clearer, and the use risk of the hanger rail support caused by airtight additional load is avoided.

Inventors

  • DU PENGLIANG
  • ZHANG YUHONG
  • WANG XIAOJUN
  • ZHANG SHIYAO

Assignees

  • 中国航空工业集团公司西安飞机设计研究所

Dates

Publication Date
20260505
Application Date
20231225

Claims (9)

  1. 1. Crane sliding rail connecting structure of flat plate airtight door, which is characterized by comprising: the first section of variable-profile I-shaped hanger rail (10), wherein a first fixed hanger rail support (1) and a first single-double-lug matched movable hanger rail support (2) are sequentially arranged on the first section of variable-profile I-shaped hanger rail (10); The second section of I-shaped hanger rail with the same cross section (11), a second single-double ear matched movable hanger rail support (3), a third single-double ear matched movable hanger rail support (4), a second fixed hanger rail support (5), a fourth single-double ear matched movable hanger rail support (6) and a fifth single-double ear matched movable hanger rail support (7) are sequentially arranged on the second section of I-shaped hanger rail with the same cross section (11); A third section of I-shaped hanger rail (12) with an equal section, wherein a sixth single-double ear matched movable hanger rail support (8) and a third fixed hanger rail support (9) are sequentially arranged on the third section of I-shaped hanger rail (12); The first fixed hanger rail support (1), the second fixed hanger rail support (5) and the third fixed hanger rail support (9) are connected with the flat plate airtight door and the hanger rail through bolts; The movable hanger rail support (2) of first single and double ears cooperation, the movable hanger rail support (3) of second single and double ears cooperation, the movable hanger rail support (4) of third single and double ears cooperation, the movable hanger rail support (6) of fourth single and double ears cooperation, the movable hanger rail support (7) of fifth single and double ears cooperation and the movable hanger rail support (8) of sixth single and double ears cooperation all include the ears support and the single ears support through pin connection, the ears support is connected with dull and stereotyped airtight door through the bolt, the single ears support passes through the bolt and is connected with the hanger rail.
  2. 2. The crane sliding rail connecting structure of the flat plate airtight door according to claim 1, wherein the length ratio of the first section variable section I-shaped hanging rail (10), the second section equal section I-shaped hanging rail (11) and the third section equal section I-shaped hanging rail (12) is 1:3:1, and a gap of 2mm is arranged between adjacent hanging rails.
  3. 3. The crane slide rail connection structure of a flat gas tight door according to claim 1, wherein, The first fixed hanging rail support (1) adopts an I-shaped section and rectangular base combined structure; The second fixed hanging rail support (5) and the third fixed hanging rail support (9) adopt a cross section and rectangular base combined structure.
  4. 4. The crane slide rail connection structure of the flat plate airtight door according to claim 1, wherein the binaural supports and the monaural supports of the first monaural-fit movable hanger rail support (2), the second monaural-fit movable hanger rail support (3), the third monaural-fit movable hanger rail support (4), the fourth monaural-fit movable hanger rail support (6), the fifth monaural-fit movable hanger rail support (7), and the sixth monaural-fit movable hanger rail support (8) are provided with support reinforcing bars.
  5. 5. The crane slide rail connection structure of the flat plate airtight door according to claim 4, wherein the ears of the first single-double-ear-matched movable hanger rail support (2), the second single-double-ear-matched movable hanger rail support (3), the third single-double-ear-matched movable hanger rail support (4), the fourth single-double-ear-matched movable hanger rail support (6), the fifth single-double-ear-matched movable hanger rail support (7) and the sixth single-double-ear-matched movable hanger rail support (8) and the ears of the single-ear support are round holes, elliptical holes or oblong holes.
  6. 6. The crane slide rail connection structure of a flat gas tight door according to claim 5, wherein, The earholes of the two-lug support of the first single-lug matched movable hanging rail support (2), the second single-lug matched movable hanging rail support (3), the fifth single-lug matched movable hanging rail support (7) and the sixth single-lug matched movable hanging rail support (8) are oblong holes, and the earholes of the single-lug support are circular holes; The ear holes of the double-ear support of the third single-double-ear matched movable hanging rail support (4) and the fourth single-double-ear matched movable hanging rail support (6) are elliptical holes, and the ear holes of the single-ear support are circular holes.
  7. 7. The crane slide rail connection structure of the flat plate airtight door according to claim 1, wherein a gap of at least 1mm is provided between lugs of the lug supports of the first single-double-lug-matched movable hanger rail support (2), the second single-double-lug-matched movable hanger rail support (3), the third single-double-lug-matched movable hanger rail support (4), the fourth single-double-lug-matched movable hanger rail support (6), the fifth single-lug-matched movable hanger rail support (7) and the sixth single-lug-matched movable hanger rail support (8) and lugs of the single-lug support.
  8. 8. The crane slide rail connection structure of a flat gas tight door according to claim 1, wherein, The cross sections of the first fixed hanging rail support (1), the second fixed hanging rail support (5) and the third fixed hanging rail support (9) are gradually increased from the hanging rail to the flat plate airtight door; The cross-sectional area of the double-lug support of the first single-double-lug matched movable hanging rail support (2), the second single-double-lug matched movable hanging rail support (3), the third single-double-lug matched movable hanging rail support (4), the fourth single-double-lug matched movable hanging rail support (6), the fifth single-double-lug matched movable hanging rail support (7) and the sixth single-double-lug matched movable hanging rail support (8) is larger than that of the single-lug support.
  9. 9. The crane rail connecting structure of flat gas-tight door according to claim 1, wherein the bolt hole formed on each hanger rail support is close to the R area.

Description

Crane sliding rail connecting structure of flat plate airtight door Technical Field The application belongs to the field of aviation structural strength design, and particularly relates to a crane sliding rail connecting structure of a flat plate airtight door. Background The crane sliding rail is an important bearing structure of a transportation type aircraft fuselage freight system, the crane sliding rail mainly bears vertical load brought by ground freight load, the flat plate airtight door is a structure of a conveyor for isolating an airtight area and a non-airtight area and mainly bears airtight load when an aircraft flies, the connection design of the crane sliding rail and the flat plate airtight door is complex, the crane sliding rail and the airtight door are integrally designed, and the crane sliding rail and the airtight door are connected by adopting a fixed hanging rail support, so that the hanging rail and the support are easily subjected to composite loading conditions of the ground freight load and the airtight load. At present, a domestic aircraft is often connected in a form of a fixed support, and foreign aircraft is connected in a matched manner of a fixed support and a movable support, but due to the fact that the complex structure of a connecting structure system of the domestic aircraft is increased in weight, technology is blocked, and the like, a crane sliding rail and air-tight door connecting form capable of decoupling loading and air-tight loading of a lifting rail of a freight aircraft needs to be designed. It is therefore desirable to have a solution that overcomes or at least alleviates at least one of the above-mentioned drawbacks of the prior art. Disclosure of Invention The application aims to provide a crane sliding rail connecting structure of a flat plate airtight door, which aims to solve at least one problem in the prior art. The technical scheme of the application is as follows: a crane slide rail connection structure of a flat plate airtight door, comprising: the first section of variable-profile I-shaped hanger rail is provided with a first fixed hanger rail support and a first movable hanger rail support matched with a single hanger and double lugs in sequence; The second section of I-shaped hanger rail with the equal section is provided with a second single-double lug matched movable hanger rail support, a third single-double lug matched movable hanger rail support, a second fixed hanger rail support, a fourth single-double lug matched movable hanger rail support and a fifth single-double lug matched movable hanger rail support in sequence; A third section of I-shaped hanger rail with equal cross section is provided with a sixth single-double ear matched movable hanger rail support and a third fixed hanger rail support in sequence; The first fixed hanging rail support, the second fixed hanging rail support and the third fixed hanging rail support are connected with the flat plate airtight door and the hanging rail through bolts; The first single-double-lug cooperation movable hanger rail support, the second single-double-lug cooperation movable hanger rail support, the third single-double-lug cooperation movable hanger rail support, the fourth single-double-lug cooperation movable hanger rail support, the fifth single-double-lug cooperation movable hanger rail support and the sixth single-double-lug cooperation movable hanger rail support all comprise double-lug supports and single-lug supports which are connected through pins, the double-lug supports are connected with a flat plate airtight door through bolts, and the single-lug supports are connected with hanger rails through bolts. In at least one embodiment of the present application, the length ratio of the first section of variable-profile i-shaped hanger rail, the second section of equal-profile i-shaped hanger rail and the third section of equal-profile i-shaped hanger rail is 1:3:1, and a 2mm gap is formed between adjacent hanger rails. In at least one embodiment of the present application, The first fixed hanging rail support adopts an I-shaped section and rectangular base combined structure; The second fixed hanging rail support and the third fixed hanging rail support adopt a cross-shaped section and rectangular base combined structure. In at least one embodiment of the present application, the binaural supports and the monaural supports of the first monaural-fit movable hanger rail support, the second monaural-fit movable hanger rail support, the third monaural-fit movable hanger rail support, the fourth monaural-fit movable hanger rail support, the fifth monaural-fit movable hanger rail support, and the sixth monaural-fit movable hanger rail support are provided with support ribs. In at least one embodiment of the present application, the ears of the first single-double-ear-matched movable hanger rail holder, the second single-double-ear-matched movable hanger rail holder, the third single-double-e