CN115096541A

CN115096541A - Sealing mechanism between wall plates of wind tunnel test section

Info

Publication number: CN115096541A
Application number: CN202211029260.2A
Authority: CN
Inventors: 赵文涛; 王颖; 阎莉; 王宇楠; 张刃; 刘海涵
Original assignee: AVIC Shenyang Aerodynamics Research Institute
Current assignee: AVIC Shenyang Aerodynamics Research Institute
Priority date: 2022-08-26
Filing date: 2022-08-26
Publication date: 2022-09-23
Anticipated expiration: 2042-08-26
Also published as: CN115096541B

Abstract

The invention relates to a sealing mechanism between wall plates of a wind tunnel test section, and belongs to the technical field of wind tunnel sealing. The problem that the flow field is influenced by the assembling clearance of the adjacent wall plates in the test section is solved. Including first wallboard and second wallboard, a plurality of first wallboards, second wallboard are circulated in order and are arranged and form the wind tunnel test section, reserve the clearance between first wallboard and the second wallboard, still include the sealing member, and the sealing member setting is in the reservation clearance department of first wallboard and second wallboard. The sealing device can fully adapt to uneven gaps or flatness errors, maintain a sealing state and reduce the influence on a flow field.

Description

Sealing mechanism between wall plates of wind tunnel test section

Technical Field

The invention relates to a sealing mechanism between wall plates of a wind tunnel test section, and belongs to the technical field of wind tunnel sealing.

Background

The wind tunnel is the most basic experimental equipment for aerodynamic research and aircraft development and mainly comprises a tunnel body, a driving system and a measurement and control system. The wind tunnel has a test section in which the necessary measurements and observations of the model can be made. And different mach number scope, the wallboard of different types is adopted to the test section to all can obtain the smooth quality of best test section when different mach numbers.

In general, the test segment wall is divided into four walls including an upper wall, a lower wall and a side wall, and a solid wall or a slotted wall can be made according to different Mach numbers. Usually, the angle of the panels of the test section is adjusted so that there is relative movement between adjacent panels and a certain gap between the panels remains, the gap being as small as possible. Due to the effects of flatness and assembly accuracy of the wall panels, when the gap is guaranteed to meet the specification, local friction exists between adjacent wall panels, relative rotation between the wall panels is hindered, and the surface of the wall panels is scratched. The small-size test section has relatively high machining precision, the flatness of the wall plates and the assembling precision can be high, the gap between the adjacent wall plates can be controlled to be fine, and the influence on the flow field is relatively small. However, for large test sections, with lengths approaching 10m, the effect on the flow field is also relatively large, considering the accuracy of panel machining and assembly, with adjacent panel gaps typically in the order of millimeters.

Therefore, it is desirable to provide a sealing mechanism between wall plates of a wind tunnel test section to solve the above technical problems.

Disclosure of Invention

The invention solves the problem that the flow field is influenced by the assembling clearance of the adjacent wall plates in the test section. The following presents a simplified summary of the invention in order to provide a basic understanding of some aspects of the invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to determine the key or critical elements of the present invention, nor is it intended to limit the scope of the present invention.

The technical scheme of the invention is as follows:

the utility model provides a sealing mechanism between wind tunnel test section wallboard, includes first wallboard and second wallboard, and a plurality of first wallboards, second wallboard are cyclic arrangement in order and form the wind tunnel test section, reserve the clearance between first wallboard and the second wallboard, still include the sealing member, and the sealing member setting is in the reservation clearance department of first wallboard and second wallboard.

Preferably: still include the spring, the side processing of first wallboard has the mounting groove, and mounting groove bottom processing has the spring blind hole, installs the spring in the spring blind hole, and the sealing member setting is in the mounting groove, sealing member one side and spring contact, sealing member opposite side and the contact of second wallboard.

Preferably: the sealing piece is arranged in the steel column blind hole, a sliding hole is formed in the position, corresponding to the steel column, of the sealing piece, and the steel column is connected with the sliding hole in a sliding mode.

Preferably: the quantity of first wallboard and second wallboard is two, and first wallboard is arranged with the second wallboard is perpendicular, and a first wallboard, a second wallboard, another first wallboard, another second wallboard circulate in order and arrange and form rectangle wind tunnel test section.

Preferably: the sealing element is a copper strip.

Preferably, the following components: the end of the sealing element is provided with a step, and the plurality of sealing elements are sequentially connected through the step at the end.

The invention has the following beneficial effects:

the invention realizes the sealing between the wall plates of the wind tunnel test section with extremely low cost, reduces the influence on the flow field of the wind tunnel, has easy maintenance and replacement of components, convenient assembly and disassembly, reduces the construction cost of the wind tunnel test section, and also reduces the later maintenance cost;

according to the invention, the clearance is reserved between the first wall plate and the second wall plate, so that the assembly difficulty and the requirement on the processing precision are reduced;

according to the invention, the sealing element can be manufactured in sections aiming at the large-size first wall plate and the large-size second wall plate, and the sealing element can be lapped through the steps of the sealing element; each section of copper bar is respectively provided with a plurality of springs and a limiting steel column, so that the device can fully adapt to uneven gaps or flatness errors and keep a sealing state.

Drawings

FIG. 1 is a side view of a wind tunnel test section;

FIG. 2 is a schematic view of the gas flow at section A-A of the test section;

FIG. 3 is a schematic structural diagram of a wind tunnel test section;

FIG. 4 is a cross-sectional view B-B of FIG. 3;

FIG. 5 is a cross-sectional view C-C of FIG. 3;

FIG. 6 is a seal installation view;

in the figure: 1-a first wall plate, 2-a second wall plate, 3-a steel column, 4-a sealing element and 5-a spring.

Detailed Description

In order that the objects, aspects and advantages of the invention will become more apparent, the invention will be described by way of example only, and in connection with the accompanying drawings. It is to be understood that such description is merely illustrative and not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

The first specific implementation way is as follows: the embodiment is described with reference to fig. 1 to fig. 6, and the sealing mechanism between the wall plates of the wind tunnel test section of the embodiment comprises a first wall plate 1 and a second wall plate 2, wherein a plurality of first wall plates 1 and second wall plates 2 are sequentially and circularly arranged to form the wind tunnel test section, a gap is reserved between the first wall plate 1 and the second wall plate 2, and the sealing mechanism further comprises a sealing element 4, wherein the sealing element 4 is arranged at the reserved gap between the first wall plate 1 and the second wall plate 2; the sealing between the wall plates of the wind tunnel test section is realized at extremely low cost, the influence on the wind tunnel flow field is reduced, the components are easy to maintain and replace, the assembly and the disassembly are convenient, the construction cost of the wind tunnel test section is reduced, and the later maintenance cost is also reduced;

the sealing device is characterized by further comprising a spring 5, wherein a mounting groove is formed in the side edge of the first wall plate 1, a spring blind hole is formed in the bottom of the mounting groove, the spring 5 is mounted in the spring blind hole, the sealing element 4 is embedded in the mounting groove and can ensure that the sealing element 4 is not prone to disengaging, one side of the sealing element 4 is in contact with the spring 5, the spring 5 is in a compression state, and the other side of the sealing element 4 tightly pushes the second wall plate 2 under the action of the spring 5, so that a sealing function is achieved; in order to fully eliminate the influence of processing and assembly, the reserved gap between the first wall plate 1 and the second wall plate 2 can be set to be more than 5mm, so that the assembly difficulty and the requirement on the processing precision are reduced;

the mounting groove is characterized by further comprising a steel column 3, a steel column blind hole is further processed at the bottom of the mounting groove, the steel column 3 is arranged in the steel column blind hole, a sliding hole is formed in the position, corresponding to the steel column 3, of the sealing element 4, and the steel column 3 is in sliding connection with the sliding hole; the steel column 3 plays a limiting role and limits the sealing element 4 from moving in the mounting groove of the first wall plate 1, and the number of the spring blind holes and the steel column blind holes is multiple;

the number of the first wall plates 1 and the number of the second wall plates 2 are two, the first wall plates 1 are perpendicular to the second wall plates 2, and one first wall plate 1, one second wall plate 2, the other first wall plate 1 and the other second wall plate 2 are sequentially and circularly arranged to form a rectangular wind tunnel test section;

the sealing element 4 is a rectangular copper strip, and the width of the sealing element 4 needs to make up for a gap of 5mm and the embedding depth in the mounting groove of the first wall plate 1;

the end part of the sealing element 4 is provided with a step, and the plurality of sealing elements 4 are sequentially connected through the step at the end part;

for the large-size first wall plate 1 and the large-size second wall plate 2, the sealing element 4 can be manufactured in a segmented mode, and only the sealing element 4 is required to be overlapped through steps; each section of copper bar is respectively provided with a plurality of springs and a limiting steel column, so that the sealing device can fully adapt to uneven gaps or flatness errors and keep a sealing state.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above 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 application described herein are capable of operation in other sequences than those illustrated or described herein.

It should be noted that, in the above embodiments, as long as the technical solutions can be aligned and combined without contradiction, those skilled in the art can exhaust all possibilities according to the mathematical knowledge of the alignment and combination, and therefore, the present invention does not describe the technical solutions after alignment and combination one by one, but it should be understood that the technical solutions after alignment and combination have been disclosed by the present invention.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a sealing mechanism between wind tunnel test section wallboard, includes first wallboard (1) and second wallboard (2), and a plurality of first wallboards (1), second wallboard (2) are cyclic arrangement in order and are formed wind tunnel test section, its characterized in that: the gap is reserved between the first wall plate (1) and the second wall plate (2), the sealing device further comprises a sealing element (4), and the sealing element (4) is arranged at the position of the reserved gap between the first wall plate (1) and the second wall plate (2).

2. The sealing mechanism for the wall plates of the wind tunnel test section according to claim 1, wherein: still include spring (5), the side processing of first wallboard (1) has the mounting groove, and the mounting groove bottom processing has the spring blind hole, installs spring (5) in the spring blind hole, and sealing member (4) set up in the mounting groove, and sealing member (4) one side and spring (5) contact, and sealing member (4) opposite side and second wallboard (2) contact.

3. The sealing mechanism for the wall plates of the wind tunnel test section according to claim 2, wherein: the mounting groove is characterized by further comprising a steel column (3), a steel column blind hole is further processed in the bottom of the mounting groove, the steel column (3) is arranged in the steel column blind hole, a sliding hole is formed in the position, corresponding to the steel column (3), of the sealing element (4), and the steel column (3) is connected with the sliding hole in a sliding mode.

4. A sealing mechanism according to any one of claims 1 to 3, characterised in that: the quantity of first wallboard (1) and second wallboard (2) is two, and first wallboard (1) is arranged perpendicularly with second wallboard (2), and a first wallboard (1), a second wallboard (2), another first wallboard (1), another second wallboard (2) cycle in order form the experimental section of rectangle wind tunnel.

5. The sealing mechanism between the wallboards of the wind tunnel test section according to any one of claims 1 to 3, wherein: the sealing element (4) is a copper strip.

6. The sealing mechanism for the wallboard of the wind tunnel test section according to claim 5, wherein: the end of the sealing element (4) is provided with a step, and the sealing elements (4) are sequentially connected through the step at the end.