Rolling frame for multi-degree-of-freedom centrifugal machine and centrifugal machine

Abstract

The invention relates to the technical field of centrifugal equipment, in particular to a rolling frame for a multi-degree-of-freedom centrifugal machine and the centrifugal machine. The rolling frame comprises a structural framework which is of a closed frame-shaped structure and comprises multiple layers of connecting beams, every two adjacent connecting beams are adjacent through a connecting frame, and the connecting beams and the connecting frames are of sheet structures; the connecting beam is connected with the connecting frame through a fastener; the two rolling shaft sleeves are arranged in the middles of the two transverse sides of the structural framework and used for being connected with output shafts of rolling motors. The two pitching shaft sleeves are arranged in the middles of the two longitudinal sides of the structural framework respectively and used for being connected with a pitching motor, the rolling frame has the advantages of being easy to machine and mature in manufacturing process, light weight of the rolling frame is guaranteed, the machining difficulty of the rolling frame is reduced, the manufacturing period of the rolling frame is shortened, and the rolling frame is suitable for being used for a large-scale production line. And the use requirements of the multi-degree-of-freedom centrifugal machine are met The centrifugal machine is matched with the rolling frame.

Description

Technical Field

[0001] The present invention relates to the technical field of centrifugal equipment, and in particular to a rolling frame for a multi-degree-of-freedom centrifuge and the centrifuge. Background Art

[0002] A three-degree-of-freedom centrifuge is an important test equipment that uses the rotational motion of a rotating arm, the rolling motion of a roll frame, and the pitching motion of a pitch frame to achieve three-degree-of-freedom coordinated motion to simulate acceleration and jerk environments. It can be used for product testing and basic research in related fields such as aviation, aerospace, navigation, weapons, and medical care.

[0003] Among them, the roll frame connects the rotating arm and the pitch frame, and is subjected to harsh and complex forces. It is located at the far end of the three-degree-of-freedom centrifuge. Its mass and moment of inertia have a great influence on the driving scale of the roll motor and the main drive motor. Therefore, lightweighting the roll frame is one of the effective ways to reduce the load of the three-degree-of-freedom centrifuge.

[0004] In existing technology, roll frames for multi-degree-of-freedom centrifuges are often constructed from welded steel plates or composite materials. However, welded steel roll frames are not lightweight, have complex structures, and are difficult to maintain weld quality. Composite roll frames, on the other hand, are expensive, require long production cycles, and are more complex. Therefore, a lightweight, easy-to-manufacture roll frame for multi-degree-of-freedom centrifuges is needed. Summary of the Invention

[0005] The present invention provides a rolling frame for a multi-degree-of-freedom centrifuge and a centrifuge. The rolling frame adopts a thin-walled box-shaped structure and has the characteristics of easy processing and mature manufacturing technology. It not only ensures the lightweight realization of the rolling frame, but also reduces the processing difficulty of the rolling frame and shortens the manufacturing cycle of the rolling frame, thereby meeting the use requirements of the multi-degree-of-freedom centrifuge.

[0006] The present invention is achieved through the following technical solutions: In a first aspect, the present invention provides a roll frame for a multi-degree-of-freedom centrifuge, comprising: a structural skeleton, which is a closed frame structure, including multiple layers of connecting beams, wherein two adjacent connecting beams are adjacent to each other through a connecting frame, wherein the connecting beams and the connecting frame are both sheet structures, and the connecting beams and the connecting frame are connected to each other by fasteners; two roll shaft sleeves are provided, which are respectively arranged in the middle of the two lateral sides of the structural skeleton and are used to connect the output shaft of the roll motor; and two pitch shaft sleeves are provided, which are respectively arranged in the middle of the two longitudinal sides of the structural skeleton and are used to connect the pitch motor.

[0007] It should be noted that for the roll frame of a multi-degree-of-freedom centrifuge that adopts a steel plate welded structure, due to the high density of steel and the need to consider the weldability of steel, the strength of the steel selected for the roll frame welded with steel is relatively low, affecting the realization of overall lightweighting; in addition, the roll frame has a complex structure, and some welds in small spaces are difficult to weld and detect, and the welding quality cannot be guaranteed.

[0008] The rolling frame made of composite materials must use carbon fiber composite materials above T700 (tensile strength grade, i.e. tensile strength of 4900MPa), which has a relatively high material cost. The rolling frame is subjected to harsh and complex forces, has a complex structure and shape, and has many special-shaped surfaces. It has high requirements for the molding quality of the composite materials and needs to be paved and formed, and uses an autoclave curing molding process. The manufacturing process is relatively complex, the manufacturing cost is high, and the manufacturing cycle is long.

[0009] In view of this, the present invention provides a roll frame for a multi-degree-of-freedom centrifuge, comprising a structural skeleton. The skeleton structure is a closed frame-shaped structure and includes multiple layers of connecting beams. Two adjacent connecting beams are connected by the connecting frame. The connecting beams and the connecting frame are both sheet-like structures, and the connecting beams and the connecting frame are connected by fasteners. Furthermore, the structural skeleton is provided with roll shaft sleeves and pitch shaft sleeves. Because the connecting beams and the connecting frame of the structural skeleton are sheet-like structures, they can be connected to form a multi-layer thin-walled box structure with excellent tensile, compressive, and bending mechanical properties. The structure can be made of aviation aluminum alloy, which facilitates lightweighting and structural strength design. Furthermore, the connecting beams and the connecting frame are connected by fasteners, resulting in a mature processing technology and reliable connection quality, reducing the processing difficulty and shortening the manufacturing cycle of the roll frame.

[0010] Therefore, the present invention has the characteristics of easy processing and mature manufacturing technology, which not only ensures the realization of lightweight rolling frame, but also reduces the processing difficulty of rolling frame and shortens the manufacturing cycle of rolling frame, meeting the use requirements of multi-degree-of-freedom centrifuge.

[0011] In an optional embodiment of the present application, the connecting beam and the connecting frame are both double-sided edge strip structures, which, on the one hand, facilitates the connection between components, and on the other hand, can play a role in strengthening the rigidity of the components.

[0012] In an optional embodiment of the present application, the connecting beam is provided with two layers, which ensures that the structural skeleton has sufficient structural strength while simplifying the structure of the structural skeleton as much as possible.

[0013] In an optional embodiment of the present application, the connecting beam includes: a first connecting section, one end of which is connected to the corresponding roll sleeve; an arc transition section, one end of which is connected to the first connecting section; a second connecting section, the length direction of which is perpendicular to the length direction of the first connecting section, one end of which is connected to one end of the arc transition section, and the other end of which is connected to the corresponding pitch sleeve, so as to facilitate the connection between the roll sleeve and the pitch sleeve through the connecting beam.

[0014] In an optional embodiment of the present application, the roll sleeve and the pitch sleeve are both stepped sleeve structures, and a plurality of connecting frames are evenly distributed circumferentially on the outer side walls of the roll sleeve and the pitch sleeve to ensure that the roll sleeve and the pitch sleeve have sufficient structural strength while being convenient for connection with the corresponding drive motor to transmit torque.

[0015] In an optional embodiment of the present application, a skin is further included, and the skin is stretched on the outside of the structural frame to close the structural frame, thereby forming a closed box structure.

[0016] In an optional embodiment of the present application, the skin is connected to the corresponding connecting beam and the connecting frame through the fasteners.

[0017] In an optional embodiment of the present application, the fastener is a blind rivet, so as to reduce the weight of the fastener itself while ensuring sufficient connection stability of the connecting piece.

[0018] In an optional embodiment of the present application, the connecting beam, the connecting frame and the skin are all made of aviation aluminum alloy materials to facilitate lightweight design.

[0019] In a second aspect, the present invention provides a centrifuge equipped with the aforementioned rolling frame for a multi-degree-of-freedom centrifuge, which can reduce the load of the centrifuge.

[0020] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. The roll frame for a multi-degree-of-freedom centrifuge provided by the present invention includes a structural skeleton, the skeleton structure is a closed frame structure, and includes multiple layers of connecting beams. Two adjacent connecting beams are adjacent to each other through the connecting frame. The connecting beams and the connecting frame are both sheet structures, and the connecting beams and the connecting frame are connected by fasteners. At the same time, a roll shaft sleeve and a pitch shaft sleeve are provided on the structural skeleton. Since the connecting beams and the connecting frame of the structural skeleton are sheet structures, they can be connected to form a multi-layer thin-walled box structure with excellent tensile, compressive and bending comprehensive mechanical properties. It can be made of aviation aluminum alloy material, which is conducive to lightweight realization and structural strength design. At the same time, the connecting beams and the connecting frame are connected by fasteners, the processing technology is mature, the connection quality is reliable, the processing difficulty of the roll frame is reduced, the manufacturing cycle of the roll frame is shortened, and the use requirements of the multi-degree-of-freedom centrifuge are met.

[0021] 2. The centrifuge provided by the present invention is adapted to be equipped with the above-mentioned rolling frame for a multi-degree-of-freedom centrifuge, which can reduce the load of the centrifuge. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly describes the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be considered as limiting the scope of the present invention. Those skilled in the art can also derive other relevant drawings based on these drawings without inventive effort.

[0023] In the attached figure: Figure 1 A schematic diagram of the three-dimensional structure of a roll frame for a multi-degree-of-freedom centrifuge provided in an embodiment of the present invention with part of the skin removed; Figure 2 For the embodiment of the present invention Figure 1 Schematic diagram of the AA surface structure; Figure 3 A schematic diagram of the connecting beam structure provided by an embodiment of the present invention; Figure 4 A schematic structural diagram of a rolling frame structure skeleton for a multi-degree-of-freedom centrifuge provided in an embodiment of the present invention; Figure 5 A schematic cross-sectional view of a connecting beam according to an embodiment of the present invention; Figure 6 A schematic cross-sectional view of a connection frame according to an embodiment of the present invention; Figure 7 A schematic diagram of the three-dimensional structure of a pitch shaft sleeve provided in an embodiment of the present invention; Figure 8 A schematic diagram of the three-dimensional structure of a rolling sleeve provided in an embodiment of the present invention; Figure 9A schematic structural diagram of a centrifuge provided in an embodiment of the present invention.

[0024] Reference numerals and corresponding component names in the accompanying drawings: 1-Instrument cabin, 2-Rotating arm, 3-Roll frame, 4-Roll motor, 5-Pitch frame, 6-Pitch motor, 7-Transmission unit, 8-Main drive motor, 9-Roll shaft sleeve, 10-Skin, 11-Pitch shaft sleeve, 12-Connecting frame, 13-Connecting beam, 13a-First connecting section, 13b-Arc transition section, 13c-Second connecting section. DETAILED DESCRIPTION

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0027] It should be noted that similar reference numerals and letters represent similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined or explained in subsequent figures. In the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0028] In the description of the embodiments of the present application, the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the application is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. These are merely for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present application.

[0029] In the description of this application, unless otherwise specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0030] It should be noted that for the roll frame of a multi-degree-of-freedom centrifuge that adopts a steel plate welded structure, due to the high density of steel and the need to consider the weldability of steel, the strength of the steel selected for the roll frame welded with steel is relatively low, affecting the realization of overall lightweighting; in addition, the roll frame has a complex structure, and some welds in small spaces are difficult to weld and detect, and the welding quality cannot be guaranteed.

[0031] The rolling frame made of composite materials must use carbon fiber composite materials above T700 (tensile strength grade, i.e. tensile strength of 4900MPa), which has a relatively high material cost. The rolling frame is subjected to harsh and complex forces, has a complex structure and shape, and has many special-shaped surfaces. It has high requirements for the molding quality of the composite materials and needs to be paved and formed, and uses an autoclave curing molding process. The manufacturing process is relatively complex, the manufacturing cost is high, and the manufacturing cycle is long.

[0032] In this regard, the inventor has innovatively designed the following technical solution, and the specific implementation solution of this application will be described in detail with reference to the accompanying drawings.

[0033] Example 1 Combine Figure 1-Figure 3 This embodiment provides a roll frame for a multi-degree-of-freedom centrifuge, including: a structural skeleton, which is a closed frame structure, including multi-layer connecting beams 13, two adjacent connecting beams 13 are adjacent to each other through a connecting frame 12, the connecting beams 13 and the connecting frame 12 are both sheet structures, and the connecting beams 13 and the connecting frame 12 are connected by fasteners; two roll shaft sleeves 9 are provided, which are respectively arranged in the middle of the two horizontal sides of the structural skeleton and are used to connect the output shaft of the roll motor 4; two pitch shaft sleeves 11 are provided, which are respectively arranged in the middle of the two longitudinal sides of the structural skeleton and are used to connect the pitch motor 6.

[0034] It will be appreciated that this embodiment also includes a skin 10, which is stretched over the exterior of the structural frame to enclose the frame, thereby forming a closed box structure. This structural form, with the material primarily concentrated in the outer region of the cross-section and a closed cross-section structure, significantly improves the structure's flexural modulus, providing excellent combined tensile, compressive, and flexural mechanical properties, facilitating lightweighting and structural strength design of the roll frame 3.

[0035] Likewise, the skin 10 is connected to the corresponding connecting beams 13 and the connecting frame 12 via the fasteners.

[0036] In other words, the roll frame 3 for a multi-degree-of-freedom centrifuge provided in this embodiment comprises a skeleton structure composed of a pair of roll sleeves 9, a pair of pitch sleeves 11, a plurality of connecting frames 12, and multiple layers of connecting beams 13. The number of layers of connecting beams 13 can be greater than two. In this embodiment, two layers of connecting beams 13 are provided, ensuring sufficient structural strength while minimizing the structural skeleton structure.

[0037] Therefore, the skeleton of the rolling frame 3 provided in this embodiment adopts a modular design, and all kinds of parts adopt the same specifications, which improves the interchangeability between parts and shortens the manufacturing and assembly cycle.

[0038] It should be understood that the connecting beam 13, the connecting frame 12, and the skin 10 are all made of aviation aluminum alloy, which has good processing technology, is easy to control the processing cycle, and has a high strength-to-weight ratio, which is conducive to lightweight design. Of course, other lightweight metals and their alloys with corresponding structural strength can also be used.

[0039] Combine Figure 4 The connecting beam 13 provided in this embodiment includes: a first connecting section 13a, one end of which is connected to the corresponding roll sleeve 9; an arc transition section 13b, one end of which is connected to the first connecting section 13a; a second connecting section 13c, the length direction of which is perpendicular to the length direction of the first connecting section 13a, one end of which is connected to one end of the arc transition section 13b, and the other end of which is connected to the corresponding pitch sleeve 11, so as to facilitate the connection between the roll sleeve 9 and the pitch sleeve 11 through the connecting beam 13.

[0040] Combine Figure 5 and Figure 6 The connecting beam 13 and the connecting frame 12 are both double-sided edge strip structures, which, on the one hand, facilitate the connection between components, and on the other hand, can play a role in strengthening the rigidity of the components.

[0041] Combine Figure 7 and Figure 8 The roll sleeve 9 and the pitch sleeve 11 both have a stepped sleeve structure, and multiple connecting frames 12 are evenly distributed around the outer walls of each sleeve. That is, the roll sleeve 9 and the pitch sleeve 11 of the roll frame 3 both adopt a stepped shaft reinforcement + multiple connecting frames 12 structure. This structure can better transmit torque, ensuring sufficient structural strength for the roll sleeve 9 and the pitch sleeve 11 while facilitating connection with the corresponding drive motors for torque transmission.

[0042] The fasteners are blind rivets, which ensure sufficient connection stability of the connecting parts while reducing the weight of the fasteners themselves. That is, this embodiment uses blind rivets to connect the corresponding components to form a closed box, which has good processability and is conducive to controlling processing quality and manufacturing cycle.

[0043] In summary, the roll frame 3 for a multi-degree-of-freedom centrifuge provided by the present invention includes a structural skeleton, the skeleton structure is a closed frame structure, and includes a multi-layer connecting beam 13, two adjacent connecting beams 13 are adjacent to each other through a connecting frame 12, the connecting beam 13 and the connecting frame 12 are both sheet structures, and the connecting beam 13 and the connecting frame 12 are connected by fasteners. At the same time, a roll shaft sleeve 9 and a pitch shaft sleeve 11 are provided on the structural skeleton.

[0044] Among them, the connecting beam 13 and the connecting frame 12 of the structural skeleton are sheet structures, which can be connected to form a multi-layer thin-walled box structure, have excellent comprehensive mechanical properties of tension, compression and bending, and can be made of aviation aluminum alloy materials, which is conducive to lightweight realization and structural strength design. At the same time, the connecting beam 13 and the connecting frame 12 are connected by fasteners, the processing technology is mature, and the connection quality is reliable, which reduces the processing difficulty of the rolling frame 3 and shortens the manufacturing cycle of the rolling frame 3.

[0045] In summary, the rolling frame 3 for a multi-degree-of-freedom centrifuge provided in this embodiment has the characteristics of easy processing and mature manufacturing technology, which not only ensures the lightweight realization of the rolling frame 3, but also reduces the processing difficulty of the rolling frame 3 and shortens the manufacturing cycle of the rolling frame 3, meeting the use requirements of the multi-degree-of-freedom centrifuge.

[0046] Example 2 Combine Figure 9 This embodiment provides a centrifuge adapted to be equipped with the rolling frame 3 for a multi-degree-of-freedom centrifuge described in Example 1.

[0047] Specifically, the centrifuge provided in this embodiment includes an instrument cabin 1, a rotating arm 2, a roll frame 3 described in Example 1, a roll motor 4, a pitch frame 5, a pitch motor 6, a transmission unit 7 and a main drive motor 8, wherein the roll frame 3 described in Example 1 is connected to the output shaft of the roll motor 4 through a roll shaft sleeve 9, and the pitch frame 5 is installed on the roll frame 3 through a pitch shaft sleeve 11, so as to utilize the rotational motion of the rotating arm 2, the rolling motion of the roll frame 3 and the pitching motion of the pitch frame 5 to achieve three-degree-of-freedom coordinated motion to simulate acceleration and acceleration environments, and can be used for product testing and basic research in related fields such as aviation, aerospace, navigation, weapons, and medical care.

[0048] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A rolling frame for a multi-degree-of-freedom centrifuge, characterized in that: include: The structural skeleton is a closed frame-shaped structure, comprising multiple layers of connecting beams (13), two adjacent connecting beams (13) are connected via a connecting frame (12), the connecting beams (13) and the connecting frame (12) are both sheet structures, and the connecting beams (13) and the connecting frame (12) are connected via fasteners; Two rolling shaft sleeves (9) are provided, which are respectively arranged in the middle of the two lateral sides of the structural frame and are used to connect the output shaft of the rolling motor (4); Two pitch shaft sleeves (11) are provided, which are respectively arranged in the middle of the longitudinal sides of the structural frame and are used to connect the pitch motor (6).

2. The rolling frame for a multi-degree-of-freedom centrifuge according to claim 1, characterized in that: The connecting beam (13) and the connecting frame (12) are both double-side edge strip structures.

3. The rolling frame for a multi-degree-of-freedom centrifuge according to claim 1, characterized in that: The connecting beam (13) is provided with two layers.

4. The rolling frame for a multi-degree-of-freedom centrifuge according to claim 1, characterized in that: The connecting beam (13) comprises: A first connecting section (13a), one end of which is connected to the corresponding rolling sleeve (9); An arc transition section (13b), one end of which is connected to the first connecting section (13a); The second connecting section (13c) has a length direction perpendicular to the length direction of the first connecting section (13a), one end of which is connected to one end of the circular arc transition section (13b), and the other end of which is connected to the corresponding pitch shaft sleeve (11).

5. The rolling frame for a multi-degree-of-freedom centrifuge according to claim 1, characterized in that: The rolling shaft sleeve (9) and the pitching shaft sleeve (11) are both stepped shaft sleeve structures, and a plurality of the connecting frames (12) are evenly distributed around the circumference of the outer side walls of the rolling shaft sleeve (9) and the pitching shaft sleeve (11).

6. The rolling frame for a multi-degree-of-freedom centrifuge according to any one of claims 1 to 5, characterized in that: It also includes a skin (10), which is stretched outside the structural frame to close the structural frame.

7. The rolling frame for a multi-degree-of-freedom centrifuge according to claim 6, characterized in that: The skin (10) is connected to the corresponding connecting beam (13) and the connecting frame (12) via the fasteners.

8. The rolling frame for a multi-degree-of-freedom centrifuge according to claim 7, characterized in that: The fastener is a blind rivet.

9. The rolling frame for a multi-degree-of-freedom centrifuge according to claim 6, characterized in that: The connecting beam (13), the connecting frame (12) and the skin (10) are all made of aviation aluminum alloy materials.

10. A centrifuge, characterized in that: A rolling frame (3) for a multi-degree-of-freedom centrifuge adapted to be used according to any one of claims 1 to 9.

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