阅读说明：本技术 一种机翼油箱口盖密封条振动密封试验装置 (Vibration sealing test device for sealing strip of wing oil tank opening cover ) 是由 秦田亮 贾银磊 马波 徐吉峰 于 2021-08-06 设计创作，主要内容包括：本发明涉及一种机翼油箱口盖密封条振动密封试验装置,属于工程技术领域飞机机体设计二级技术。该装置包括：安装待测密封条的箱体单元,用于盛放燃油,施加内部油压；往复振动单元,设置在试验支架上,与所述箱体单元滑动连接,用于封闭所述箱体单元,并相对于箱体单元进行往复振动；动力提供单元,与所述往复振动单元固定连接,用于为所述往复振动单元的往复振动提供动力。本发明的装置结构紧凑,应用方便,可以降低机翼油箱口盖密封设计的风险和研发成本。(The invention relates to a vibration sealing test device for a sealing strip of an oil tank port cover of an aircraft wing, and belongs to the second-level technology of aircraft body design in the technical field of engineering. The device includes: a box body unit provided with a sealing strip to be tested is used for containing fuel oil and applying internal oil pressure; the reciprocating vibration unit is arranged on the test bracket, is connected with the box body unit in a sliding manner, is used for sealing the box body unit and performs reciprocating vibration relative to the box body unit; and the power supply unit is fixedly connected with the reciprocating vibration unit and used for supplying power to the reciprocating vibration of the reciprocating vibration unit. The device disclosed by the invention is compact in structure and convenient to apply, and can reduce the risk of sealing design of the wing fuel tank port cover and the research and development cost.)

1. The utility model provides a wing oil tank flap sealing strip vibration seal test device which characterized in that, the device includes:

a box body unit provided with a sealing strip to be tested is used for containing fuel oil and applying internal oil pressure;

the reciprocating vibration unit is arranged on the test bracket, is connected with the box body unit in a sliding manner, is used for sealing the box body unit and performs reciprocating vibration relative to the box body unit;

and the power supply unit is fixedly connected with the reciprocating vibration unit and used for supplying power to the reciprocating vibration of the reciprocating vibration unit.

2. The device for testing the vibration sealing of the sealing strip of the oil tank port cover of the wing as claimed in claim 1, wherein the box body unit comprises a box body wall, and a threaded blind hole is formed in the upper end face of the box body wall and is used for being in sliding connection with the reciprocating vibration unit; a groove is designed on the inner side of the threaded blind hole and used for mounting a sealing strip; and a first threaded through hole and a second threaded through hole are formed in the side face of the wall of the box body and used for respectively mounting a pressure gauge and an oil inlet pipe.

3. The device for testing the vibration seal of the sealing strip of the oil tank cover of the wing according to claim 2, wherein an oil pipe valve is arranged on the oil inlet pipe.

4. The device for testing the vibration seal of the sealing strip of the oil tank port cover of the wing as claimed in claim 1, wherein a flange is arranged at the bottom of the box unit and is fixed with the test platform through a bolt mounting hole.

5. The device for testing the vibration sealing of the sealing strip of the oil tank port cover of the wing as claimed in claim 1, wherein the reciprocating vibration unit comprises a cover plate, an exhaust valve, a slide rail, a slide block, a positioning threaded sleeve and a positioning screw rod, the cover plate is used for closing the tank unit and providing a track for reciprocating vibration; two sides of the rail are respectively provided with a sliding rail; the slide block is fixed on the test bracket through the positioning threaded sleeve and the positioning screw rod.

6. The device for testing the vibration sealing of the sealing strip of the oil tank port cover of the wing as claimed in claim 5, wherein the adjustment of the position of the sliding block can be realized by rotating the positioning screw sleeve and the positioning screw rod; the two pairs of sliding rails and the sliding blocks ensure that the cover plate vibrates in a reciprocating manner along the rails.

7. The device for testing the vibration sealing of the sealing strip of the oil tank port cover of the wing as claimed in claim 5, wherein the connecting hole of the cover plate and the tank body unit is designed to be a long hole or a clearance fit hole so as to ensure that the cover plate and the tank body unit which are connected in a sliding way realize relative movement.

8. The device for testing the vibration sealing of the sealing strip of the oil tank port cover of the wing as claimed in claim 5, wherein the cover plate is provided with a threaded through hole for installing an exhaust valve, and when fuel is injected into the tank unit, the exhaust valve is opened to exhaust air; the exhaust valve closes after the fuel is filled.

9. The device for testing the vibration sealing of the sealing strip of the oil tank cover of the wing as claimed in claim 5, wherein the cover plate is designed with a lug piece for connecting with the power supply unit to supply power for reciprocating vibration motion.

10. The device for testing the vibration sealing of the sealing strip of the oil tank port cover of the wing as claimed in claim 1, wherein the test bracket comprises a stand column, a transverse plate and a base, the base is fixed with the test platform through a bolt, and a threaded through hole is reserved on the stand column and used for installing a positioning screw.

Technical Field

The invention belongs to the second-level technology of airplane body design in the technical field of engineering. The invention provides a vibration sealing test device for a sealing strip of a wing fuel tank port cover of a civil aircraft, which is used for testing the sealing performance of the sealing strip of the fuel tank port cover in a vibration environment.

Background

Modern civil aircraft generally adopts the wing design scheme of whole oil tank, and a part of wing box structure of wing is the structure of oil tank simultaneously. In the flying process of the airplane, the vibration between the oil tank port cover and the wall plate can be caused by airflow, engine vibration and the like, and the design of the port cover sealing strip is an important consideration factor.

At present, no special test method and device for testing the sealing performance of the sealing strip of the wing oil tank port cover of the civil aircraft under the vibration working condition exist, and the sealing effect of the sealing strip of the oil tank port cover is mainly verified in the shaking and vibration test of the oil tank. The whole wing oil tank is used as a test piece in the test, the structure size is large, the test cost is high, and the test is often carried out in the later stage of wing development. For a composite fuel tank, the design of the seal size affects the design of the fuel tank wall plate. The more the later the seal strip is verified, the greater the impact on the design change of the composite material fuel tank wall plate. Therefore, it is necessary to establish a special test method and device, which can use a smaller test device and test piece to verify the sealing effect of the tank cap sealing strip in the vibration working state at the initial design stage of the wing tank.

Disclosure of Invention

In order to solve the problems, the invention provides a test device for a sealing test of a sealing strip of an oil tank port cover in a vibration environment, which is used for verifying the design of the sealing strip in a wing research and development stage. The device disclosed by the invention is compact in structure and convenient to apply, and can reduce the risk of sealing design of the wing fuel tank port cover and the research and development cost.

According to the technical scheme of the invention, the invention provides a vibration sealing test device for a sealing strip of an oil tank port cover of a wing, which comprises:

a box body unit provided with a sealing strip to be tested is used for containing fuel oil and applying internal oil pressure;

the reciprocating vibration unit is arranged on the test bracket, is connected with the box body unit in a sliding manner, is used for sealing the box body unit and performs reciprocating vibration relative to the box body unit;

and the power supply unit is fixedly connected with the reciprocating vibration unit and used for supplying power to the reciprocating vibration of the reciprocating vibration unit.

Furthermore, the box body unit comprises a box body wall, and a threaded blind hole is formed in the upper end face of the box body wall and is used for being in sliding connection with the reciprocating vibration unit; a groove is designed on the inner side of the threaded blind hole and used for mounting a sealing strip; and a first threaded through hole and a second threaded through hole are formed in the side face of the wall of the box body and used for respectively mounting a pressure gauge and an oil inlet pipe.

Furthermore, an oil pipe valve is arranged on the oil inlet pipe.

Furthermore, the bottom of the box body unit is provided with a flange which is fixed with the test platform through a bolt mounting hole.

Furthermore, the reciprocating vibration unit comprises a cover plate, an exhaust valve, a slide rail, a slide block, a positioning threaded sleeve and a positioning screw rod, wherein the cover plate is used for sealing the box body unit and providing a track for reciprocating vibration; two sides of the rail are respectively provided with a sliding rail; the slide block is fixed on the test bracket through the positioning threaded sleeve and the positioning screw rod.

Furthermore, the position of the sliding block can be adjusted by rotating the threaded sleeve and the positioning screw rod; the two pairs of sliding rails and the sliding blocks ensure that the cover plate vibrates in a reciprocating manner along the rails.

Furthermore, the connecting holes of the cover plate and the box body unit are designed into long holes or clearance fit holes so as to ensure that the cover plate and the box body unit which are connected in a sliding way realize relative movement.

Furthermore, the cover plate is provided with a threaded through hole for installing an exhaust valve, and when fuel is injected into the box body unit, the exhaust valve is opened to exhaust air; the exhaust valve closes after the fuel is filled.

Furthermore, the cover plate is provided with a lug piece which is used for being connected with the power supply unit and supplying power for reciprocating vibration motion.

Further, the test support includes stand, diaphragm and base, the base passes through the bolt and is fixed with test platform, the stand leaves the screw thread through-hole for the installation positioning screw.

The invention has the beneficial effects that:

by adopting the sealing strip vibration sealing test device, the sealing performance of the sealing strip under the vibration working condition can be tested at the initial stage of wing design by adopting a smaller test device and test cost, the design parameters of the sealing strip are determined, and the progress and cost risk caused by the design change of the sealing strip at the later stage of wing oil tank design are reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a structural diagram of a vibration seal testing device for a sealing strip of a wing fuel tank cap according to the invention;

FIG. 2 is a box structure diagram of the vibration sealing test device for the sealing strip of the wing fuel tank port cover according to the invention;

FIG. 3 is a cover plate structure diagram of the vibration sealing test device for the sealing strip of the wing fuel tank cap according to the invention;

FIG. 4 is a structural diagram of a test bracket of the vibration sealing test device for the sealing strip of the oil tank port cover of the wing, which is disclosed by the invention;

FIG. 5 is a schematic diagram of a vibration sealing test device for a sealing strip of a wing fuel tank cap according to the present invention;

FIG. 6 is an exploded schematic view of the vibration seal testing device for the sealing strip of the fuel tank cap of the wing according to the present invention.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The terms "first," "second," and the like in the description and in the claims of the present disclosure are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the disclosure described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.

Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

A plurality, including two or more.

And/or, it should be understood that, for the term "and/or" as used in this disclosure, it is merely one type of association that describes an associated object, meaning that three types of relationships may exist. For example, a and/or B, may represent: a exists alone, A and B exist simultaneously, and B exists alone.

Modern civil aircraft generally adopts the wing design scheme of whole oil tank, and a part of wing box structure of wing is the structure of oil tank simultaneously. In the flying process of the airplane, the vibration between the oil tank port cover and the wall plate can be caused by airflow, engine vibration and the like, and the design of the port cover sealing strip is an important consideration factor. The invention provides a test device for a sealing test of an oil tank port cover sealing strip in a vibration environment, which is used for verifying the design of the sealing strip in a wing research and development stage. The device disclosed by the invention is compact in structure and convenient to apply, and can reduce the risk of sealing design of the wing fuel tank port cover and the research and development cost.

The invention provides a sealing test device for a sealing strip of a wing oil tank port cover under a vibration condition, which comprises a box body 1, a cover plate 2, an exhaust valve 3, a pressure gauge 4, an oil inlet pipe 5, an oil pipe valve 6, a test support 7, a slide rail 8, a slide block 9, a positioning screw sleeve 10 and a positioning screw rod 11. As shown in fig. 1.

The tank 1 is used for containing fuel and placing sealing strips, as shown in figure 2. The upper end face of the box wall 101 is provided with a threaded blind hole 102 for connecting with the cover plate 2; a groove 103 is designed on the inner side of the threaded hole 102 and used for installing a sealing strip; a threaded through hole 104 is reserved on the side surface of the box body wall 101 and used for installing the pressure gauge 4; the side surface of the box wall 101 is provided with a threaded through hole 105 for installing the oil inlet pipe 5. A flange 106 is designed at the bottom of the box body 1 and is fixed with the test platform through a bolt mounting hole 107.

The cover 2 is shown in fig. 3 and is used to close the enclosure 1 while providing a track 203 for the oscillating movement. Two sides of the rail 203 are respectively provided with a slide rail 8. The slide block 9 is fixed on the test bracket 7 through a positioning threaded sleeve 10 and a positioning screw rod 11. The adjustment of the position of the slide 9 can be realized by rotating the threaded sleeve 10 and the positioning screw 11. The four pairs of slide rails 8 and sliders 9 ensure that the cover plate 2 vibrates reciprocally along the rails 203.

The connecting hole 201 of the cover plate 2 and the box body 1 is designed as a long hole or a clearance matching hole to ensure that the cover plate 2 and the box body 1 can move relatively.

The cover plate 2 is designed with a threaded hole 202 for installing the exhaust valve 3. When fuel is injected into the box body 1, the exhaust valve 3 is opened to exhaust air; the exhaust valve 3 is closed after the fuel is filled.

The cover plate 2 is provided with a lug 204 which is connected with the testing machine and provides power for vibration motion.

As shown in fig. 4, the test stand 7 includes a column 701, a cross plate 702, and a base 703. The base 703 is fixed to the test bed by bolts. The column 701 is provided with a threaded hole 704 for installing the positioning screw 11.

As shown in FIG. 5, the device for testing the vibration sealing of the sealing strip of the flap of the wing fuel tank, provided by the invention, can be used for verifying the sealing performance of the sealing strip of the wing fuel tank under the combined action of vibration and internal oil pressure in the flying process of an airplane by applying internal pressure to the sealing strip to be tested through oil in the tank body and applying a vibration environment to the sealing strip to be tested through the relative motion of the cover plate and the tank body, so that the sealing condition of the sealing strip under the dynamic load condition can be verified by using the whole or part of the structure of the wing fuel tank, and the research, development and verification costs of the sealing strip of the flap of the wing fuel tank are reduced.

Examples

The invention provides a vibration sealing test device for a sealing strip of an oil tank port cover of an airfoil. The structure is decomposed as shown in figure 6, and comprises a box body 1, a cover plate 2, an exhaust valve 3, a pressure gauge 4, an oil inlet pipe 5, an oil pipe valve 6, a test support 7, a slide rail 8, a slide block 9, a positioning screw sleeve 10 and a positioning screw rod 11

The bottom of the box body 1 is fixed with the test bed through bolts, and the groove 103 in the upper part of the box body 1 is provided with a sealing strip and is combined with the cover plate 2 through bolts.

And a pressure gauge 4 is arranged on the side wall of the box body 1 and is used for displaying the internal oil pressure value in real time.

An oil inlet pipe 5 is arranged on the side wall of the box body 1, an oil pipe valve 6 is arranged on the oil inlet pipe 5, and fuel oil with preset pressure is injected into the box body according to test requirements.

An exhaust valve 3 is arranged on the cover plate 2, the valve is opened when fuel oil is injected, and the valve is closed after the fuel oil is filled.

The rails 203 on both sides of the cover plate 2 are provided with slide rails 8.

The test support 7 is fixed on the test bed through bolts. And a positioning screw rod 11 is arranged on the test bracket 7.

The positioning screw rod 11 is combined with the positioning screw sleeve 10 through threads.

The positioning screw sleeve 10 and the sliding block 9 are combined together through threads.

The position of the slide block 9 is adjusted by rotating the positioning screw rod 11 and the positioning screw sleeve 10 to make the slide block contact with the slide rail 8.

The cover plate 2 is connected with the vibration testing machine through the lug on the right side, and the cover plate 2 vibrates in a reciprocating mode along the direction of the sliding rail 8 relative to the box body 1 under the driving of the testing machine.

The key points of the proposal of the invention are as follows:

1. the upper end surface of the box body 1 of the device is provided with a groove 103 for installing and fixing the sealing strip;

2. the side wall of the box body 1 is provided with a pressure gauge 4 for observing the pressure of oil in the box body 1 in real time;

3. the oil inlet pipe 5 is arranged on the side wall of the box body 1 and used for injecting oil into the box body 1 during a test and discharging the oil out of the box body 1 after the test is finished;

4. an exhaust valve 3 is arranged on a cover plate 2 and used for exhausting internal air when oil is injected into a box body 1;

5. the bolt hole 201 of the cover plate 2 is designed to be a long hole or a clearance assembling hole, a sufficient clearance is reserved between the screw and the bolt hole, and the screw cannot collide with the bolt hole 201 when the cover plate 2 reciprocates relative to the box body 1;

6. the invention is that the both sides of the cover plate 2 are designed with the track 203, which is used for installing the slide rail 8 for controlling the cover plate movement direction;

7. one side of the cover plate 2 is provided with a connecting lug 204 for connecting the cover plate 2 to the actuator cylinder of the testing machine;

8. the two sides of the track 203 of the cover plate 2 are provided with the slide rails 8 which are used for supporting the cover plate 2 to move along the direction of the track 203;

9. the invention is provided with the positioning threaded sleeve 10 and the positioning screw rod 11, the position of the sliding block 9 relative to the test bracket 7 is adjusted through the rotation of the positioning threaded sleeve 10 and the positioning screw rod 11, the sliding block 9 is ensured to be attached to the sliding rail 8, and the positioning requirement on the test bracket 11 is reduced;

10. the invention is provided with a test bracket 7 provided with a positioning screw rod 11, and supports are provided for the positioning screw sleeve 10 and the positioning screw rod 11.

A static pressure sealing test of a sealing strip of an oil tank opening cover has been developed in the research of key technologies of a CR929 wing oil tank, the test effect is good, and the purpose of verifying the static pressure sealing performance of the sealing strip is achieved. The invention is an improved design based on the static pressure sealing test method, and has strong realizability.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.