A structure of a four-degree-of-freedom mechanism Y-direction mechanism frame connecting a model support

Abstract

The application discloses a structure of a model support connected with a Y mechanism frame of a four-degree-of-freedom mechanism, which comprises an X mechanism, a Y mechanism arranged on the inner side of the X mechanism and in sliding connection with the X mechanism in the horizontal direction, a model support fixed on the Y mechanism frame of the Y mechanism and having a model supported on the upper end of the model support, and a power mechanism arranged between the X mechanism and the Y mechanism. The model support is connected with the Y mechanism frame of the four-degree-of-freedom mechanism, and the side sliding base and the angle of attack frame do not need to be disassembled, the positioning support capacity in the X direction is achieved, the model support has the characteristics of convenient installation, strong bearing capacity, long support platform, many support points and support of large models.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of high-speed aerodynamic test equipment, and more particularly, the application relates to a structure for connecting a model support to a Y-direction mechanism frame of a four-degree-of-freedom mechanism. BACKGROUND

[0002] A model support mechanism is a core device of a high-speed wind tunnel, which is used to accurately change the position and posture of a model and bear the aerodynamic load borne by the model. A certain high-speed jet flow wind tunnel is equipped with a model support mechanism including four degrees of freedom of an angle of attack, a sideslip angle, Y and X directions. Under conventional conditions, a model support is connected to a bent-knife support on an angle-of-attack mechanism, and the model can freely change the position and posture of the mechanism within the operating range of the four-degree-of-freedom mechanism. However, the bearing capacity of the bent-knife support is not high, the taper hole on the bent-knife support is single support, and it is difficult to support large models, especially some weak models with super-long and super-large sizes that need multi-point support, which cannot well meet the support requirements of the certain high-speed jet flow. In a conventional high-speed wind tunnel, the core model support mechanism is usually a single angle-of-attack mechanism, and the expansion of the connection mode of the model support is difficult due to the limitation of the space of the connection part, the flow field and other factors, and the expandability is poor. After the four-degree-of-freedom mechanism is equipped in the certain high-speed jet flow wind tunnel, the degrees of freedom are more, the test cabin space is large, and the expandability is great. In order to meet the support requirements, it is necessary to expand the connection mode of the model support. Expanding the connection mode of the model support on the non-bent-knife support of the four-degree-of-freedom mechanism can increase the size and load of the supported model and reduce the number of motion degrees of freedom of the model support. According to the actual requirements, it is necessary to expand a structure for connecting a model support to a Y-direction mechanism frame, so as to have a single degree of freedom in the X direction, realize a super-large support platform, and realize the support of a super-long and super-large model. SUMMARY

[0003] An object of the present application is to solve at least the above problems and / or defects, and to provide at least the advantages to be described later.

[0004] In order to achieve these objects and other advantages according to the present application, a structure for connecting a model support to a four-degree-of-freedom mechanism frame is provided, which comprises:

[0005] an X mechanism;

[0006] a Y mechanism arranged on the inner side of the X mechanism, and the Y mechanism is in sliding connection with the X mechanism in the horizontal direction;

[0007] a model support fixed to the Y mechanism frame of the Y mechanism, and the upper end of the model support supports a model;

[0008] a power mechanism arranged between the X mechanism and the Y mechanism.

[0009] Preferably, the structure of the model support comprises:

[0010] At least two groups of cross beams are fixedly installed on the Y mechanism frame;

[0011] A support platform is fixedly arranged at the upper end of the cross beam;

[0012] A plurality of support columns are fixedly arranged at the upper end of the support platform.

[0013] Preferably, the support platform is a frame structure, and a connecting plate is fixedly installed between the two longitudinal beams above the support platform, and the support columns are fixed at both ends of the connecting plate.

[0014] Preferably, the cross section of the support column is a blade structure.

[0015] Preferably, the structure of the X mechanism comprises:

[0016] The X mechanism frame is a rectangular structure hollow frame without cross beams at the top, and two groups of horizontal linear guides are respectively installed on the left and right sides inside the X mechanism frame, and an X mechanism servo oil cylinder is installed between the two groups of horizontal linear guides on the same side.

[0017] Preferably, the structure of the Y mechanism comprises:

[0018] The Y mechanism frame is a rectangular structure hollow frame without cross beams at the top and rear, and two groups of X mechanism sliders are respectively fixedly arranged on the left and right sides of the Y mechanism frame, and each group of X mechanism sliders is correspondingly slidably installed on the horizontal linear guide;

[0019] An X mechanism oil cylinder connecting seat is fixedly arranged on the outer side of the Y mechanism, and the piston rod of the X mechanism servo oil cylinder is connected with the X mechanism oil cylinder connecting seat.

[0020] Preferably, the lower end of the X mechanism is provided with an X mechanism lower cross beam, the front end and the rear end of the X mechanism are respectively provided with an X mechanism front cross beam and an X mechanism rear cross beam, the lower end of the X mechanism is further provided with a plurality of lower bases, and the upper end of the X mechanism is provided with an X mechanism connecting surface.

[0021] The lower end of the Y mechanism is provided with a Y mechanism lower cross beam, the front end of the Y mechanism is provided with a Y mechanism front cross beam, and the upper end of the Y mechanism is provided with a Y mechanism support connecting surface.

[0022] The present application has at least the following advantages: the Y mechanism frame connecting model support of the four-degree-of-freedom mechanism is used, the side sliding base and the angle frame do not need to be disassembled, the positioning support capacity in the X direction is provided, the present application has the characteristics of convenient installation, strong bearing capacity, long support platform, many support points and supporting large models.

[0023] Other advantages, objects, and features of the application will be understood by those skilled in the art from the following description of the application, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 A structural schematic diagram of a model support connected with a Y mechanism frame of a four-degree-of-freedom mechanism is provided in the application;

[0025] Figure 2 A structural side view schematic diagram of a model support connected with a Y mechanism frame of a four-degree-of-freedom mechanism is provided in the application;

[0026] Figure 3 A connection structure schematic diagram of a model support and a Y mechanism is provided in the application;

[0027] Figure 4 A structural schematic diagram of a model support is provided in the application;

[0028] Figure 5 A structural schematic diagram of a model support is provided in the application; DETAILED DESCRIPTION

[0029] The application will be further described in detail below with reference to the accompanying drawings, so that those skilled in the art can implement the application according to the description and the drawings.

[0030] It should be understood that the terms such as "have", "contain", and "include" used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0031] It should be noted that in the description of the application, the orientation or positional relationship indicated by the terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0032] In the description of the application, unless otherwise explicitly specified and limited, the terms "mount", "provided with", "sleeved / connected", "connected", and the like should be understood broadly, for example, "connected" can be fixedly connected, can be detachably connected, or integrally connected, can be mechanically connected, can be electrically connected, can be directly connected, can be indirectly connected through an intermediate medium, can be internal communication of two elements, and those skilled in the art can understand the specific meaning of the above terms in the application according to the specific circumstances.

[0033] In addition, in the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is horizontally lower than the second feature.

[0034] As shown in Figures 1-5 The structure of the model support connected to the Y mechanism frame of the four-degree-of-freedom mechanism of the present application comprises:

[0035] An X mechanism 1;

[0036] A Y mechanism 2 is arranged on the inner side of the X mechanism 1, and the Y mechanism 2 is in sliding connection with the X mechanism 1 in the horizontal direction;

[0037] A model support 3 is fixed on the Y mechanism frame 201 of the Y mechanism 2, and the upper end of the model support 3 supports a model 4;

[0038] A power mechanism is arranged between the X mechanism 1 and the Y mechanism 2.

[0039] Working principle: The structure of the model support connected to the Y mechanism frame of the four-degree-of-freedom mechanism of the present application utilizes the Y mechanism of the four-degree-of-freedom mechanism to connect the model support, without the need to remove the side sliding base and the angle of attack frame, and simultaneously driven by the corresponding power mechanism, the Y mechanism 2 can move on the X mechanism 1 in the horizontal direction, so that the structure has the X-direction positioning and supporting capability. The present application has the characteristics of convenient installation, strong bearing capacity, large supporting platform length, multiple support points, and the ability to support large models. In order to connect the model support 3 with the Y mechanism 2, the middle support of the angle of attack frame is removed, the lower support is retained, and the lower support is operated to a large angle of attack position, so that the lower support is completely retracted into the angle of attack frame. The Y mechanism 2 drives the side sliding base and the angle of attack frame to descend as a whole until the uppermost part of the angle of attack frame is completely submerged below the height of the Y mechanism frame 201, facilitating the installation of the cross beam 301 of the model support 3 on the Y mechanism frame 201.

[0040] In the above technical solution, the structure of the model support 3 comprises:

[0041] Two groups of cross beams 301 are fixedly installed on the Y mechanism frame 201, and the two groups of cross beams 301 are used to cross the wide Y mechanism frame 201 and are connected with the Y mechanism frame 201 to provide a bottom support with sufficient strength and rigidity for the support platform 302 to bear the load borne by the upper support platform 302; after the cross beam 301 and the support platform 302 are installed on the Y mechanism frame 201, the top plane of the support platform should be far away from the flow field boundary to reduce the blockage, and the farther, the better under the condition that the strength and rigidity of the support column meet the requirements. The curved knife bracket on the angle of attack frame is removed, the lower bracket is retracted into the angle of attack frame, and the cross beam 301 and the Y mechanism frame 201 are connected and fastened by screws and pins to bear the model load and impact.

[0042] The support platform 302 is fixedly arranged at the upper end of the two groups of cross beams 301, and the support platform 302 is used to provide a unified platform for the upper support columns 303. The support platform 302 can be processed by using a complete thick steel plate or a welded frame, and the specific processing method is determined according to the test characteristics and requirements.

[0043] The four support columns 303 are arranged in pairs at the upper end of the support platform 302, and the height, size and number of the support columns 303 are determined according to the model and test requirements. Generally, the longer the model 4 or the greater the load, the more the number of support columns required and the greater the distance between the support columns.

[0044] In the above technical solution, the support platform 302 is a frame structure, and a connecting plate 304 is fixedly installed between the two longitudinal beams 305 above the support platform 302, and the support column 303 is fixed at both ends of the connecting plate 304.

[0045] In the above technical solution, the cross section of the support column 303 is a blade structure to reduce airflow blockage.

[0046] In the above technical solution, the structure of the X mechanism 1 comprises:

[0047] The X mechanism frame 101 is a rectangular hollow frame without a cross beam at the top, and two groups of horizontal linear guides 102 are respectively installed on the left and right sides in the X mechanism frame 101, and an X mechanism servo oil cylinder 103 is installed between the two groups of horizontal linear guides 102 on the same side. The axes of the four groups of horizontal linear guides 102 and the two X mechanism servo oil cylinders 103 are parallel to the wind tunnel axis, the top plane of the horizontal linear guide 102 is parallel to the wind tunnel axis and perpendicular to the horizontal plane.

[0048] In the above technical solution, the structure of the Y mechanism comprises:

[0049] Y mechanism frame 201, which is a top, rear beamless rectangular structure hollow frame, the left and right sides of the Y mechanism 2 are respectively fixedly provided with two groups of X mechanism sliding blocks 203, each group of X mechanism sliding blocks 203 is correspondingly slidably installed on the horizontal linear guide rail 102; according to the load size, each horizontal linear guide rail 102 corresponds at least two X mechanism sliding blocks 203 installed on the outer side of the Y mechanism 2, Figure 3 The number of X mechanism sliding blocks 203 corresponding to each horizontal linear guide rail 102 shown in the middle is four; the two outer sides of the Y mechanism 2 are symmetrically fixedly provided with X mechanism oil cylinder connecting seats 204, and the piston rod of the X mechanism servo oil cylinder 103 is connected with the X mechanism oil cylinder connecting seat 204, that is, the Y mechanism 2 is driven by the two X mechanism servo oil cylinders 103 to move horizontally in the X direction along the wind tunnel axis direction, so as to realize the X direction (horizontal direction) degree of freedom change of the Y mechanism 2, the model support 3 and the model 4.

[0050] The Y mechanism frame 201 is beamless at the rear, and the X mechanism sliding blocks 203 after the connection of the Y mechanism frame 201 with the X mechanism frame 101 through the front cross beam 205, the lower cross beam 209 and the X mechanism frame 101 improve the rigidity of supporting the Y mechanism frame 201, the structure is compact, and the support requirements of the model support 3 are met.

[0051] In the above technical scheme, the lower end of the X mechanism 1 is provided with an X mechanism lower cross beam 106, the front end and the rear end of the X mechanism are respectively provided with an X mechanism front cross beam 108 and an X mechanism rear cross beam 105, and the lower end of the X mechanism 1 is further provided with six lower bases 107; the upper end of the X mechanism 1 is provided with an X mechanism connecting surface 104.

[0052] The lower end of the Y mechanism 2 is provided with a Y mechanism lower cross beam 209, the front end of the Y mechanism 2 is provided with a Y mechanism front cross beam 205, and the upper end of the Y mechanism 2 is provided with a Y mechanism support connecting surface 208.

[0053] When the middle support of the angle mechanism is connected with the model (that is, the bending knife support is installed in the angle mechanism of the original four-degree-of-freedom mechanism, and the model is supported by the middle support of the bending knife support), the load and length of the model are greatly limited. For example, the four-degree-of-freedom mechanism middle support of a certain 2-meter-level wind tunnel, the upward lifting force (perpendicular to the model axis direction) and the axial force (parallel to the model axis direction) or the resultant force thereof do not exceed 50,000 N, and the length of the supported model should not exceed 4 m.

[0054] However, the model full length can reach 9.5 m by using the four-degree-of-freedom mechanism Y mechanism frame to connect the model support provided by the application, and the maximum axial impact load can exceed 200,000 N when performing supersonic test without being put into, and the reliable connection and support of multiple large cross-section size series components can be realized, and such models cannot be supported by traditional middle supports.

[0055] The number of devices and processing stages described herein are used to simplify the description of the application. Applications, modifications and variations of the application will be apparent to those skilled in the art without departing from the general concept of the application.

[0056] While the embodiments of the application have been disclosed in connection with the specification and examples herein, it should be understood that they are not limited to the particular details so far set forth, but rather their scope is embodied in the appended claims and their equivalents.

Claims

1. A structure employing a four-degree-of-freedom mechanism Y-direction mechanism frame connection model stand, characterized by, Include: X mechanism; Y mechanism, which is arranged inside the X mechanism, and the Y mechanism is slidingly connected with the X mechanism in the horizontal direction; Model support, which is fixed on the Y mechanism frame of the Y mechanism, and the upper end of the model support supports the model; The power mechanism is arranged between the X mechanism and the Y mechanism; The structure of the model support includes: At least two groups of cross beams are fixedly installed on the Y mechanism frame; Support platform, which is fixedly arranged on the upper end of the cross beam; A plurality of support columns are fixedly arranged on the upper end of the support platform; The support platform is a frame structure, and a connecting plate is fixedly installed between the two longitudinal beams above the support platform, and the support columns are fixedly installed at both ends of the connecting plate; The cross section of the support column is a blade structure; The structure of the X mechanism includes: The X mechanism frame is a rectangular hollow frame without horizontal beams at the top, and two groups of horizontal linear guides are installed on the left and right sides inside the X mechanism frame, and an X mechanism servo oil cylinder is installed between the two groups of horizontal linear guides on the same side; The structure of the Y mechanism includes: The Y mechanism frame is a rectangular hollow frame without horizontal beams at the top and rear, and two groups of X mechanism sliders are fixedly arranged on the left and right sides of the Y mechanism frame, and each group of X mechanism sliders is slidingly installed on the horizontal linear guide; The outer side of the Y mechanism is fixedly provided with an X mechanism oil cylinder connecting seat, and the piston rod of the X mechanism servo oil cylinder is connected with the X mechanism oil cylinder connecting seat.

2. The structure employing a four-degree-of-freedom mechanism Y-direction mechanism frame connection model stand according to claim 1, characterized by, The lower end of the X mechanism is provided with an X mechanism lower cross beam, the front end and the rear end of the X mechanism are respectively provided with an X mechanism front cross beam and an X mechanism rear cross beam, and the lower end of the X mechanism is further provided with a plurality of lower bases. The lower end of the Y mechanism is provided with a Y mechanism lower cross beam, the front end of the Y mechanism is provided with a Y mechanism front cross beam, and the upper end of the Y mechanism is provided with a Y mechanism support connecting surface.

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