Storage box bottom structure with rack

Abstract

The utility model provides a storage box bottom structure with a rack, which comprises a box bottom formed by welding a circular top cover and a plurality of scalloped segments; the rack small end frame is arranged on the outer side of the center of the top cover and used for being connected with an engine; and the plurality of rack force transmission plates are uniformly connected to the circumferential position of the rack small end frame and respectively extend to the scalloped segments from the top cover. The box bottom structure has the advantages of being simple in structure and capable of improving carrying capacity.

Description

Technical Field

[0001] The utility model relates to the field of liquid space carriers, in particular to a tank bottom structure with a frame. Background Art

[0002] The upper stage of a liquid space launch vehicle generally uses a single engine as a power source, and the engine is connected to the rocket body through an engine frame. For liquid space launch vehicles with a relatively large diameter, the engine frame is usually connected to the rocket body end frame, resulting in a heavy rocket body structure and poor rigidity, which directly affects the carrying capacity of the space launch vehicle.

[0003] In view of this, there is an urgent need to design a tank bottom structure with a frame that has a simple structure and improves the carrying capacity. Utility Model Content

[0004] The utility model aims to overcome the deficiencies of the prior art and provide a tank bottom structure with a frame.

[0005] The utility model provides a tank bottom structure with a frame, comprising: a tank bottom, which is welded from a circular top cover and a plurality of melon slices; a small end frame of the frame, which is arranged at the outer side of the center of the top cover and is used for installation and connection with an engine; and a plurality of frame force transmission plates, which are evenly connected to the circumferential positions of the small end frame of the frame and extend from the top cover to the melon slices respectively.

[0006] According to one embodiment of the utility model, the small end frame of the frame is a hollow frustum, wherein the upper end surface is circular and has multiple bolt holes for installing the engine, and the lower end surface extends laterally outward to form a connecting ring plate for connecting the frame force transmission plate.

[0007] According to an embodiment of the utility model, a boss is provided at a position where the small end frame of the frame abuts against the force transmission plate of the frame for bearing radial force.

[0008] According to an embodiment of the utility model, the height of the frame force transmission plate is continuously reduced from the top cover to the melon slice.

[0009] According to an embodiment of the utility model, the end of the frame force transmission plate close to the center of the top cover is the first end, and the first ends of a plurality of the frame force transmission plates are connected and fixed by a small ring frame.

[0010] According to an embodiment of the utility model, the cross section of the frame force transmission plate is T-shaped, and a reinforcing rib is arranged near the first end.

[0011] According to an embodiment of the utility model, the frame force transmission plate is connected to the box bottom through a force transmission plate angle piece, and the inner surface of the force transmission plate angle piece is in contact with the outer surface of the box bottom.

[0012] According to one embodiment of the utility model, the force transmission plate corner piece is divided into a first corner piece and a second corner piece, and the frame force transmission plate is connected to the top cover through the first corner piece and the second corner piece; it also includes a third corner piece and a fourth corner piece, and the frame force transmission plate is connected to the melon slice through the third corner piece and the fourth corner piece.

[0013] According to an embodiment of the utility model, there are 12 frame force transmission plates in total, and each group of 3 is divided into 4 groups and evenly distributed along the circumferential direction.

[0014] According to an embodiment of the utility model, the parts of each group of three frame force transmission plates close to the edge of the top cover are connected and fixed by a large ring frame.

[0015] The tank bottom structure with a rack in this embodiment is achieved by evenly arranging a number of rack force transfer plates extending from the top cover to the melon slices on the tank bottom as a load-bearing basis, and installing the small end frame of the rack to one end of the number of rack force transfer plates close to the center of the top cover. The rack force transfer plates can transfer and diffuse the concentrated load at the small end frame to the tank bottom.

[0016] The tank bottom structure of the present application can transmit the engine thrust to the tank bottom through the integrated design of the tank bottom and the engine frame, thereby improving the rigidity and strength of the structure. The layout of each structure is simple and compact, which reduces the weight of the overall space launch vehicle and improves the carrying capacity.

[0017] It should be understood that the above general description and the following specific embodiments are only exemplary and illustrative and are not intended to limit the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following drawings are a part of the specification of the present utility model, which illustrate exemplary embodiments of the present utility model. The attached drawings and the description of the specification are used to explain the principle of the utility model.

[0019] Figure 1 It is a schematic diagram of a tank bottom structure with a frame according to an embodiment of the utility model;

[0020] Figure 2 It is a schematic diagram of a tank bottom structure with a frame in another embodiment of the utility model;

[0021] Figure 3 It is a partial cross-sectional view of a tank bottom structure with a frame according to an embodiment of the utility model;

[0022] Figure 4 It is a schematic diagram of a frame force transmission plate in a tank bottom structure with a frame according to an embodiment of the utility model;

[0023] Figure 5It is a schematic diagram of a servo bracket in a tank bottom structure with a frame according to an embodiment of the utility model.

[0024] Reference numerals:

[0025] 100-box bottom, 101-top cover, 102-melon slice, 200-small end frame of the frame, 201-boss, 300-force transmission plate of the frame, 301-small ring frame, 302-reinforcement rib, 303-force transmission plate angle piece, 304-large ring frame, 400-servo bracket, 401-mounting seat, 402-support rod, 403-connecting seat. DETAILED DESCRIPTION

[0026] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present invention and are used to illustrate the principles of the present invention, and are not configured to limit the present invention. In addition, the structural components in the drawings are not necessarily drawn to scale. For example, the sizes of some structural components or areas in the drawings may be enlarged for other structural components or areas to help understand the embodiments of the present invention.

[0027] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the embodiments of the utility model. In the description of the utility model, it should be noted that, unless otherwise specified, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances.

[0028] In addition, the terms "include", "comprise", "have" or any other variations thereof are intended to cover non-exclusive inclusion, so that a structure or component including a series of elements includes not only those elements, but also other mechanical elements that are not explicitly listed or inherent in the structure or component. In the absence of more restrictions, the elements defined by the sentence "include..." do not exclude the existence of other identical elements in the article or device including the elements.

[0029] Spatially related terms such as "below", "beneath", "under", "low", "above", "on", "high", etc. are used to facilitate description to explain the positioning of one element relative to a second element, indicating that these terms are intended to cover different orientations of the device in addition to orientations different from those shown in the figures. In addition, for example, "one element is above / below another element" can mean that the two elements are in direct contact, or that there are other elements between the two elements. In addition, terms such as "first", "second", etc. are also used to describe various elements, regions, parts, etc., and should not be regarded as limiting. Similar terms represent similar elements throughout the description.

[0030] For those skilled in the art, the present invention can be implemented without some of these specific details. The following description of the embodiments is only intended to provide a better understanding of the present invention by showing examples of the present invention.

[0031] Figure 1 It is a schematic diagram of a tank bottom structure with a frame according to an embodiment of the utility model; Figure 2 It is a schematic diagram of a tank bottom structure with a frame in another embodiment of the utility model; Figure 3 It is a partial cross-sectional view of a tank bottom structure with a frame according to an embodiment of the utility model; Figure 4 It is a schematic diagram of a frame force transmission plate in a tank bottom structure with a frame according to an embodiment of the utility model; Figure 5 It is a schematic diagram of a servo bracket in a tank bottom structure with a frame according to an embodiment of the utility model.

[0032] like Figure 1 As shown, the utility model provides a tank bottom structure with a frame, comprising: a tank bottom 100, which is welded by a circular top cover 101 and a plurality of melon segments 102; a small frame end frame 200, which is arranged at a position outside the center of the top cover 101 for installation and connection with the engine; and a plurality of frame force transmission plates 300, which are evenly connected to the circumferential position of the small frame end frame 200 and extend from the top cover 101 to the melon segments 102 respectively.

[0033] The upper and lower parts in this application refer to the bottom structure of the tank with the frame being in a position such as Figure 1 The placement state shown, that is, the upper and lower positions corresponding to the state where the small end frame 200 of the rack and the force transmission plate 300 of the rack are on the top and the bottom 100 of the box is on the bottom, technical personnel in this field should not deliberately confuse the upper and lower positions referred to in this application by changing the product placement posture.

[0034] Specifically, the tank bottom structure with a rack in this embodiment is configured by evenly arranging a plurality of rack force transfer plates 300 as a load-bearing foundation on the tank bottom 100 extending from the top cover 101 to the melon slice 102, and by installing the rack small end frame 200 to one end of the plurality of rack force transfer plates 300 close to the center of the top cover 101, so that the rack force transfer plate 300 can transfer and diffuse the concentrated load at the small end frame to the tank bottom 100. This solution can transfer the engine thrust to the tank bottom 100 through the integrated design of the tank bottom 100 and the engine rack, thereby improving the rigidity and strength of the structure, and the overall layout is simple and compact, reducing the weight of the overall space vehicle and improving the carrying capacity.

[0035] Among them, the tank bottom 100 is welded by several melon slices 102 around a top cover 101, and the thickness of the tank bottom 100 is set according to the internal pressure requirement of the tank, and the thickness of the top cover 101 and the melon slices 102 are kept consistent. The material of the tank bottom 100 can be selected from high-strength stainless steel, and the diameter of the top cover 101 and the number of melon slices 102 are designed according to process feasibility. As one of the embodiments, the thickness of the tank bottom 100 is between 1 and 2 mm, the tank bottom 100 is an ellipsoid bottom, and the number of melon slices 102 is 16. Since the thickness of the tank bottom 100 is relatively thin, in order to improve the bearing capacity of the tank bottom 100, the contact area between the frame force transmission plate 300 and the tank bottom 100 can be increased, thereby improving the bearing capacity. In addition, the length and number of the frame force transmission plate 300 and the contact area with the tank bottom 100 can be optimized according to the actual load condition and stiffness requirements of the arrow body.

[0036] like Figure 3 As shown, according to one embodiment of the utility model, the small end frame 200 of the frame can be a hollow frustum, wherein the upper end surface is circular and has a plurality of bolt holes for installing the engine, and the lower end surface extends laterally outward to form a connecting ring plate for connecting the frame force transmission plate 300.

[0037] According to an embodiment of the present utility model, a boss 201 is provided at a position where the frame small end frame 200 abuts against the frame force transmission plate 300 for bearing radial force.

[0038] like Figure 4 As shown, according to one embodiment of the present invention, the height of the frame force transmission plate 300 (i.e., the distance from the frame force transmission plate 300 to the surface of the top cover 101 or the melon slice 102 ) continuously decreases from the top cover 101 to the melon slice 102 .

[0039] According to an embodiment of the present invention, the end of the frame force transmission plate 300 close to the center of the top cover 101 is the first end, and the first ends of several frame force transmission plates 300 are connected and fixed by a small ring frame 301 .

[0040] According to an embodiment of the present invention, the cross section of the frame force transmission plate 300 is T-shaped, and a reinforcing rib 302 is provided near the first end.

[0041] According to an embodiment of the present invention, the frame force transmission plate 300 is connected to the box bottom 100 via the force transmission plate angle piece 303, wherein the inner profile of the force transmission plate angle piece 303 is in contact with the outer profile of the box bottom 100. When the reinforcing rib 302 is provided, the two ends of the reinforcing rib 302 are fixedly connected to the frame force transmission plate 300 and the force transmission plate angle piece 303, respectively.

[0042] According to one embodiment of the utility model, the force transmission plate angle piece 303 is divided into a first angle piece and a second angle piece, and the frame force transmission plate 300 is connected to the top cover 101 through the first angle piece and the second angle piece; it also includes a third angle piece and a fourth angle piece, and the frame force transmission plate 300 is connected to the melon segment 102 through the third angle piece and the fourth angle piece.

[0043] like Figure 2 and Figure 3 As shown, according to an embodiment of the present utility model, there are 12 frame force transmission plates 300 in total, and each group of 3 is divided into 4 groups and evenly distributed along the circumferential direction.

[0044] According to an embodiment of the present utility model, the portion of each group of three frame force transmission plates 300 close to the edge of the top cover 101 (ie, the approximate middle position of the frame force transmission plates) is also connected and fixed by a large ring frame 304 .

[0045] Specifically, the frame small end frame 200 and the small ring frame 301 are connected to the frame force transfer plate 300 by bolts. The material of the frame small end frame 200, the small ring frame 301 and the frame force transfer plate 300 can be selected to be aluminum alloy. The frame small end frame 200 is a hollow frustum, and a plurality of bolt holes are arranged on its upper end surface, so that the engine and the frame small end frame 200 can be connected. The lower end surface of the frame small end frame 200 is designed to extend laterally outward to form a circular connecting ring plate, and bolt holes are evenly arranged on the connecting ring plate for connecting with the upper part of the first end of the frame force transfer plate 300 by bolts. Among them, the upper end surface and the lower end surface of the frame small end frame 200 are described in the installation position with the box bottom 100 at the bottom, and the spatial position is only used for convenience of description.

[0046] The height of the frame force transmission plate 300 decreases continuously from the top cover 101 to the melon slice 102, that is, the height of the frame force transmission plate 300 is the largest at the first end close to the center of the top cover 101. The small ring frame 301 is bolted to the first ends of the 12 frame force transmission plates 300 on the bottom 100 at the middle position in the vertical direction, that is, each frame force transmission plate 300 is connected in series through the small ring frame 301, thereby improving the anti-instability ability of the frame force transmission plate 300 and the bearing capacity of the bottom 100.

[0047] In a specific embodiment, a boss 201 is designed below the connecting ring plate of the frame small end frame 200 to cooperate with the frame force transmission plate 300, and a concave surface above the first end of the frame force transmission plate 300 is designed to cooperate with the boss 201, which is used to bear and transmit the radial force transmitted to the frame force transmission plate 300 by the frame small end frame 200, thereby increasing the strength of the tank bottom structure. The frame force transmission plate 300 adopts a "T"-shaped cross-section structure with strong anti-instability, and a reinforcing rib 302 is provided at the frame force transmission plate 300 near the frame small end frame 200 to further improve the rigidity of the tank bottom.

[0048] In one embodiment, the assembly of the small end frame 200 of the frame, the small ring frame 301 and the frame force transmission plate 300 is connected to the force transmission plate angle piece 303 welded to the bottom 100 by bolts. The roughly middle position of each group of three frame force transmission plates 300 is connected and fixed by a large ring frame 304, and the bottom of the large ring frame 304 is connected to the large ring frame angle piece of the bottom 100 of the box by bolts. A notch is designed at the intersection of the large ring frame 304 and the frame force transmission plate 300, and a suitable angle piece can be selected to connect the frame force transmission plate 300 and the large ring frame 304.

[0049] It should be noted that the frame force transmission plate 300 and the large ring frame 304 can be connected to the box bottom 100 through angle pieces, and the force transmission plate angle piece 303 and the large ring frame angle piece need to be welded to the box bottom 100, wherein the inner profile of the angle piece fits the outer profile of the box bottom 100. For example, the force transmission plate angle piece 303 and the large ring frame angle piece can be welded when the box bottom 100 is intact, wherein the force transmission plate angle piece 303 can also be welded when the box bottom 100 is in the state of parts, that is, when the top cover 101 and the melon slice 102 are separated.

[0050] As an example, the force transmission plate angle piece 303 is composed of the first angle piece, the second angle piece, the third angle piece, and the fourth angle piece from the top cover 101 to the melon segment 102. The first angle piece and the second angle piece are used to be welded to the top cover 101, and the third angle piece and the fourth angle piece are used to be welded to the melon segment 102. Optionally, the first angle piece and the fourth angle piece are respectively welded to the melon segment 102 and the top cover 101 by resistance spot welding or laser stitch welding when the melon segment 102 and the top cover 101 are in the component state. Since the melon segment 102 and the top cover 101 require welding and clamping tooling when welding, which interferes with the second angle piece and the third angle piece, the second angle piece and the third angle piece can be selected to be welded when the box bottom 100 is in the whole bottom state.

[0051] As one of the embodiments, Figure 2 and Figure 5As shown, a servo bracket 400 is provided on the upper end surface of the frame force transmission plate 300 for connecting the servo actuator. The servo bracket 400 is composed of a servo mounting seat 401, a first support rod 402, a second support rod 402, a third support rod 402, a fourth support rod 402, and a first connecting seat 403, a second connecting seat 403, a third connecting seat 403, and a fourth connecting seat 403 corresponding to each support rod 402. A servo actuator connection interface is provided on the servo mounting seat 401, and the servo actuator is used to control the swing of the engine. Left-handed and right-handed internal threads are provided on both sides of the four support rods 402, and left-handed and right-handed external threads are provided on the servo mounting seat 401 and the four connecting seats 403. The two ends of the four support rods 402 are respectively connected to the servo mounting seat 401 and the four connecting seats 403 by threaded connection, and the position of the servo mounting seat 401 is adjusted by the screwing depth of the left-handed and right-handed threads to ensure the installation accuracy of the servo actuator. The servo bracket 400 is connected to the upper end surface of the frame force transmission plate 300 by bolts. The servo bracket 400 adopts a structural form of four support rods 402, and the four support rods 402 are respectively installed on the upper end surfaces of each group of three frame force transmission plates 300, which expands the force bearing area of ​​the box bottom 100 and improves the rigidity of the servo bracket 400.

[0052] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A tank bottom structure with a frame, characterized in that: include: The bottom of the box is made of a round top cover and several melon slices welded together; A small end frame of the frame, arranged outside the center of the top cover and used for installation and connection with the engine; A plurality of frame force transmission plates are evenly connected to the circumferential positions of the frame small end frame and extend from the top cover to the melon segments respectively.

2. The tank bottom structure with a frame according to claim 1, characterized in that: The small end frame of the frame is a hollow frustum, wherein the upper end surface is circular and provided with a plurality of bolt holes for installing the engine, and the lower end surface extends outwardly and laterally to form a connecting ring plate for connecting the frame force transmission plate.

3. The tank bottom structure with a frame according to claim 2, characterized in that: A boss is arranged at a position where the small end frame of the frame abuts against the force transmission plate of the frame to bear radial force.

4. The tank bottom structure with a frame according to claim 1, characterized in that: The height of the frame force transmission plate is continuously reduced from the top cover to the melon slice.

5. The tank bottom structure with a frame according to claim 4, characterized in that: The end of the frame force transmission plate close to the center of the top cover is the first end, and the first ends of a plurality of the frame force transmission plates are connected and fixed by a small ring frame.

6. The tank bottom structure with a frame according to claim 5, characterized in that: The cross section of the frame force transmission plate is T-shaped, and a reinforcing rib is arranged near the first end.

7. The tank bottom structure with a frame according to claim 1, characterized in that: The frame force transmission plate is connected to the box bottom through a force transmission plate angle piece, and the inner surface of the force transmission plate angle piece is in contact with the outer surface of the box bottom.

8. The tank bottom structure with a frame according to claim 7, characterized in that: The force transmission plate angle piece is divided into a first angle piece and a second angle piece, and the frame force transmission plate is connected to the top cover through the first angle piece and the second angle piece; It also includes a third corner piece and a fourth corner piece, and the frame force transmission plate is connected to the melon slices through the third corner piece and the fourth corner piece.

9. The tank bottom structure with a frame according to claim 1, characterized in that: There are 12 frame force transmission plates in total, and each group of 3 is divided into 4 groups and evenly distributed along the circumferential direction.

10. The tank bottom structure with a frame according to claim 9, characterized in that: Parts of each group of three frame force transmission plates close to the edge of the top cover are connected and fixed by a large ring frame.

Images