Disc spring type shock absorber and stacked vibration damping module

Abstract

The present invention discloses a disc spring shock absorber, which adopts a disc spring configuration and includes a sidewall, an upper end surface, and a lower end surface. The sidewall is an aspherical curved surface, the upper end surface is disposed at a first end of the sidewall and is an annular plane, and the lower end surface is disposed at a second end of the sidewall opposite the first end and is an annular plane, wherein the diameter of the lower end surface is larger than that of the upper end surface. The disc spring design greatly improves the lateral stiffness of the shock absorber, thereby achieving a precisely axially oriented vibration reduction effect, resolving the problem of non-directional energy absorption caused by conventional shock absorbers, and improving the directional accuracy and lateral stiffness of the vibration reduction system.

Description

Technical Field

[0001] The present invention relates to the field of aerospace technology, and in particular to a disc spring shock absorber and a stacked vibration damping module. Background Art

[0002] During launch, transportation, and landing, a spacecraft is subject to various external vibrations, which can affect its stability and safety, or even cause malfunction. A spacecraft vibration damper is a device that reduces the impact of external vibrations on a spacecraft. Its design principle is based on vibration damping and energy absorption. In spacecraft design, vibration dampers are typically installed around key components of the spacecraft, such as engines and fuel tanks. When a spacecraft is subject to external vibrations, the vibration damper absorbs the vibration energy and reduces its impact on the spacecraft.

[0003] At present, the shock absorbers for anti-instantaneous large overload application scenarios mostly use silicone-based rubber pads, metal foam, metal rubber, and hydraulic dampers. However, due to the characteristics of the vibration-damping material and the design of the shock absorber, it is difficult to apply it to the application scenario of high-level impact vibration in a compact space. Specifically, the existing shock absorbers usually need to be fixed at the front and rear ends of the vibration reduction link, and the local stress of the main structure is too large. The existing shock absorbers attenuate impact vibrations through their own non-directional energy absorption, and it is difficult to apply them to vibration reduction scenarios that require directional accuracy. Existing aerospace shock absorbers mainly deal with frequency domain vibrations, and the attenuation means for time domain vibration impacts are relatively scarce. The strength of most shock absorbers themselves is difficult to withstand the time domain level of nearly 10,000 g, such as 100,000 m / s 2 Large overload shocks of this magnitude can lead to premature energy absorption saturation or outright damage, resulting in loss of vibration damping performance. Furthermore, existing shock absorbers have insufficient energy storage density to cope with high-magnitude shocks, or their structural dimensions and mass would increase dramatically, making their effective application difficult. Summary of the Invention

[0004] In order to solve some or all of the problems in the prior art, the present invention provides a disc spring type shock absorber in a first aspect. The disc spring type shock absorber adopts a disc spring type configuration and comprises:

[0005] a side wall, which is an aspherical curved surface;

[0006] an upper end surface, which is provided at the first end of the side wall and is an annular plane; and

[0007] The lower end surface is arranged at the second end of the side wall opposite to the first end thereof and is an annular plane, wherein the diameter of the lower end surface is larger than that of the upper end surface.

[0008] Furthermore, the width of the lower end surface is not less than 5 mm.

[0009] Furthermore, the inner curvature radius of the side wall is 110 to 130 mm, and the outer curvature radius R o Determined according to the following formula:

[0010] R o =R i +b e ,

[0011]

[0012] Among them, R i b is the inner curvature radius of the side wall e is the effective thickness of the side wall, g s is the system impact acceleration, m s is the mass of the vibration-damped link, P M is the yield strength of the material, l δ is the average of the inner and outer arc lengths in the shock absorber cross section.

[0013] Furthermore, the height of the side wall is 10 mm.

[0014] Furthermore, the lower end surface includes a plurality of bosses, and the plurality of bosses are circumferentially distributed on the lower end surface.

[0015] Furthermore, the cross section of the boss is trapezoidal.

[0016] Furthermore, the edge of the boss does not exceed the edge of the lower end surface.

[0017] Furthermore, the material of the shock absorber is titanium-based superelastic alloy.

[0018] Furthermore, the shock absorber is manufactured by an ultra-high temperature hot pressing integrated molding process.

[0019] Based on the disc spring shock absorber as described above, a second aspect of the present invention provides a stacked shock absorption module, which includes a plurality of shock absorbers as described above.

[0020] Furthermore, the number of the shock absorbers is 1 to 3.

[0021] Furthermore, the shock absorbers are stacked in the same direction.

[0022] Furthermore, the shock absorbers are stacked alternately in forward and reverse directions.

[0023] The present invention provides a disc spring type shock absorber and stacked type shock absorption module, which adopts a disc spring design, greatly improving the lateral stiffness of the shock absorber, thereby achieving a vibration reduction effect with precise axis orientation, solving the problem of non-directional ability caused by non-directional energy absorption of conventional shock absorbers, and improving the pointing accuracy and lateral stiffness of the shock absorption system. The shock absorber adopts a strictly designed special curved surface shape and is integrally formed with high energy storage density materials, which can solve the problem that the shock absorber's own strength cannot cope with the time domain of nearly 10,000 g level (100,000 m / s 2 The shock absorber's performance is significantly improved, addressing the issue of high overload impacts (levels of overload) and significantly improving the shock absorber's quality-to-efficiency ratio. Furthermore, the shock absorber's bottom is equipped with circumferentially distributed trapezoidal boss sliders, enabling the shock absorber to meet multi-degree-of-freedom constraints without requiring local positioning. This provides high-precision assembly positioning for the shock absorber while also ensuring the radial motion trajectory during actuation. The shock absorber can be stacked in both directions, adapting to different vibration damping scenarios without increasing process complexity, thus offering greater adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] To further illustrate the above and other advantages and features of various embodiments of the present invention, a more detailed description of various embodiments of the present invention will be presented with reference to the accompanying drawings. It will be understood that these drawings depict only typical embodiments of the present invention and are not to be considered as limiting the scope thereof. In the drawings, for clarity, identical or corresponding components will be represented by the same or similar reference numerals.

[0025] Figure 1 A schematic structural diagram of a disc spring shock absorber according to an embodiment of the present invention is shown;

[0026] Figure 2 A schematic diagram showing the distribution of bosses of a disc spring shock absorber according to one embodiment of the present invention is shown;

[0027] Figure 3 A schematic cross-sectional view of a boss of a disc spring type shock absorber according to one embodiment of the present invention is shown;

[0028] Figure 4 A schematic structural diagram of a stacked vibration reduction module according to an embodiment of the present invention is shown;

[0029] Figure 5 A schematic side view of a stacked vibration reduction module according to an embodiment of the present invention is shown;

[0030] Figure 6 A schematic structural diagram showing a stacked vibration reduction module according to another embodiment of the present invention; and

[0031] Figure 7 A schematic side view of a stacked vibration reduction module according to yet another embodiment of the present invention is shown. DETAILED DESCRIPTION

[0032] In the following description, the present invention is described with reference to various embodiments. However, those skilled in the art will recognize that the various embodiments can be implemented without one or more of the specific details or with other alternative and / or additional methods, materials, or components. In other cases, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring the inventive aspects of the present invention. Similarly, for the purpose of explanation, specific quantities, materials, and configurations are described to provide a comprehensive understanding of the embodiments of the present invention. However, the present invention is not limited to these specific details. In addition, it should be understood that the various embodiments shown in the drawings are illustrative representations and are not necessarily drawn to scale.

[0033] In this specification, reference to "one embodiment" or "the embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. The appearances of the phrase "in one embodiment" in various places in this specification are not necessarily all referring to the same embodiment.

[0034] In the present invention, unless otherwise specified, the phrases "disposed on," "disposed above," and "disposed above" do not exclude the presence of intermediate components. Furthermore, "disposed on or above" merely indicates the relative positional relationship between two components and, in certain circumstances, such as after reversing the product orientation, can be converted to "disposed below or below," and vice versa.

[0035] In the present invention, each embodiment is only intended to illustrate the aspects of the present invention and should not be construed as limiting.

[0036] In the present invention, unless otherwise specified, the quantifiers "a" and "an" do not exclude the presence of multiple elements.

[0037] It should also be pointed out that in the embodiments of the present invention, for the sake of clarity and simplicity, only a portion of the parts or components may be shown, but a person skilled in the art will understand that under the teachings of the present invention, the required parts or components may be added according to the needs of the specific scenario.

[0038] It should also be noted that, within the scope of the present invention, terms such as "same," "equal," and "equal to" do not imply absolute equality of values, but rather allow for a certain reasonable error. In other words, such terms also encompass "substantially the same," "substantially equal," and "substantially equal." Similarly, in the present invention, terms such as "perpendicular to" and "parallel to" indicating direction also encompass the meaning of "substantially perpendicular to" and "substantially parallel to."

[0039] In response to the problem that existing shock absorbers are difficult to apply to application scenarios where high-level impacts are to be reduced in a compact space, the present invention provides a disc spring shock absorber and a stacked vibration reduction module, which are based on high energy storage density metal materials and disc spring configuration, as well as circumferentially uniformly distributed positioning bosses and an inverted stacking design to solve the above-mentioned problems existing in the prior art.

[0040] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings of the embodiments.

[0041] Figure 1 FIG. 1 is a schematic structural diagram of a disc spring type shock absorber according to an embodiment of the present invention. Figure 1 As shown, a disc spring shock absorber adopts a disc spring configuration and includes a sidewall 101, an upper end surface 102, and a lower end surface 103. The upper end surface 102 and the lower end surface 103 are respectively disposed at the first and second ends of the sidewall 101. The diameter of the sidewall 101 gradually increases from the first end to the second end, so that the diameter of the lower end surface 103 is larger than that of the upper end surface 102. The disc spring design can greatly enhance the lateral stiffness of the shock absorber, achieving a precisely axially oriented vibration reduction effect. This solves the problem of non-directional energy absorption caused by conventional shock absorbers and improves the directional accuracy and lateral stiffness of the vibration reduction system.

[0042] In one embodiment of the present invention, the disc spring type shock absorber is made of a high energy storage density metal material, such as a high energy storage density titanium-based superelastic alloy, and the disc spring type shock absorber is made of an ultra-high temperature hot pressing integrated molding process. In one embodiment of the present invention, the processing pressure of the disc spring type shock absorber should be greater than the stress of the high energy storage density metal material undergoing plastic deformation, that is, greater than the yield strength of the high energy storage density metal material. During actual processing, the actual pressure value can be determined according to the hot press. By adopting a high energy storage density metal material, the disc spring type shock absorber has a significantly reduced mass and size compared to shock absorbers of the same level of performance.

[0043] like Figure 1 As shown, in one embodiment of the present invention, the side wall 101 adopts a strictly designed special curved surface shape, such as an aspheric curved surface shape. In one embodiment of the present invention, the side wall 101 is an aspheric surface such as a quadratic rotationally symmetric aspheric surface, a high-order rotationally symmetric aspheric surface, an off-axis aspheric surface, a complex surface, a multi-axis symmetric aspheric surface, etc. Specifically, in one embodiment of the present invention, the inner curvature radius R of the side wall 101 is i 110 to 130 mm, outer curvature radius R O Determined according to the following formula:

[0044] R o =R i +b e ,

[0045]

[0046] Among them, b e is the effective thickness of the side wall, g s is the system impact acceleration, m s is the mass of the vibration-damped link, P M is the yield strength of the disc spring shock absorber, l δ It is the average of the inner arc length and the outer arc length in the side wall section. In one embodiment of the present invention, the height of the side wall 101 is 10 mm. By adopting a strictly designed special curved surface shape and integrally formed with high energy storage density materials, the shock absorber can withstand a higher time domain large overload impact level, thereby solving the problem that the shock absorber's own strength cannot cope with the time domain of nearly 10,000 g level (100,000 m / s 2 It can solve the problem of large overload impact (level) and significantly improve the quality-efficiency ratio of the shock absorber.

[0047] In one embodiment of the present invention, both the upper end surface 102 and the lower end surface 103 are annular planes. This effectively increases the contact area between the shock absorber and the main structure, reduces local stress in the main structure, optimizes the uniformity of force applied to the system, and effectively enhances stability and lateral stiffness. In one embodiment of the present invention, the width of the upper end surface 102 is xx, and the width of the lower end surface 103 is the same as the width of the upper end surface 102, xxx. In some embodiments of the present invention, the width of the lower end surface 103 may differ slightly from that of the upper end surface 102.

[0048] In order to provide high-precision assembly positioning for the shock absorber, in one embodiment of the present invention, a plurality of bosses 104 are provided on the lower end surface 103 . Figure 2 FIG. 1 is a schematic diagram showing the boss distribution of a disc spring type shock absorber according to an embodiment of the present invention. Figure 2 As shown, the plurality of bosses 104 are circumferentially distributed on the lower end surface 103 . Figure 3 FIG1 is a schematic cross-sectional view of a boss of a disc spring type shock absorber according to an embodiment of the present invention. Figure 3 As shown, in one embodiment of the present invention, the boss 104 is a wedge-shaped boss slider with a trapezoidal cross-section. It is located in the middle of the plane of the lower end surface 103, that is, the edge of the boss 104 does not extend beyond the edge of the lower end surface 103 to avoid stress concentration and damage. Accordingly, the contact surface of the main structure requires a groove of the same width, and the shock absorber can be fixed to the main structure through the fit between the boss 104 and the groove. Using this connection method, the shock absorber can meet multi-degree-of-freedom constraints without the need for local positioning, while also ensuring the radial motion trajectory of the shock absorber during actuation.

[0049] Based on the disc spring damper described above, the present invention further provides a stacked damping module comprising a plurality of the aforementioned dampers 100, stacked in sequence. In an embodiment of the present invention, the dampers 100 can be stacked bidirectionally, either forward or reverse, to accommodate various damping scenarios without increasing the complexity of the process, thus providing enhanced adaptability. Figure 4 and Figure 5 A schematic diagram and a side view of a stacked vibration damping module according to an embodiment of the present invention are shown. As shown, when the stiffness and load-bearing capacity of the vibration dampers need to be increased, the plurality of vibration dampers 100 can be stacked in a forward direction, i.e., all vibration dampers are oriented in the same direction. Figure 4 and Figure 5 The following is a schematic structural diagram of a stacked vibration damping module according to an embodiment of the present invention, and a schematic side view thereof. As shown in the figure, when it is necessary to increase the energy storage space of the vibration damper and increase the stroke, a reverse stacking method can be adopted, that is, the vibration dampers are stacked alternately in the forward and reverse directions. In order to facilitate installation to the main structure, the bottom vibration damper is usually in the forward direction, and the vibration damper adjacent to it is placed in the reverse direction, and the stacking is repeated in this manner. In one embodiment of the present invention, the vibration damping module includes a maximum of 3 vibration dampers. It should be understood that in the reverse stacking structure, in order to ensure that the vibration dampers fit well, only the vibration dampers in contact with the main structure are provided with bosses, and the remaining vibration dampers do not need to be provided with bosses.

[0050] The present invention further provides a spacecraft, which includes the disc spring shock absorber and / or stacked shock absorption module as described above. The stacked shock absorption module can be arranged, for example, in the engine, fuel storage, etc. of the spacecraft to reduce the vibration of these components during the launch, transportation and landing of the spacecraft.

[0051] The present invention provides a disc spring type shock absorber and stacked type shock absorption module, which adopts a disc spring design, greatly improving the lateral stiffness of the shock absorber, thereby achieving a vibration reduction effect with precise axis orientation, solving the problem of non-directional ability caused by non-directional energy absorption of conventional shock absorbers, and improving the pointing accuracy and lateral stiffness of the shock absorption system. The shock absorber adopts a strictly designed special curved surface shape and is integrally formed with high energy storage density materials, which can solve the problem that the shock absorber's own strength cannot cope with the time domain of nearly 10,000 g level (100,000 m / s 2 The shock absorber's performance is significantly improved, addressing the issue of high overload impacts (levels of overload) and significantly improving the shock absorber's quality-to-efficiency ratio. Furthermore, the shock absorber's bottom is equipped with circumferentially distributed trapezoidal boss sliders, enabling the shock absorber to meet multi-degree-of-freedom constraints without requiring local positioning. This provides high-precision assembly positioning for the shock absorber while also ensuring the radial motion trajectory during actuation. The shock absorber can be stacked in both directions, adapting to different vibration damping scenarios without increasing process complexity, thus offering greater adaptability.

[0052] Although various embodiments of the present invention have been described above, it should be understood that they are presented by way of example only and not limitation. It will be apparent to those skilled in the relevant art that various combinations, modifications, and variations may be made thereto without departing from the spirit and scope of the present invention. Therefore, the breadth and scope of the present invention disclosed herein should not be limited by the exemplary embodiments disclosed above, but should be defined solely in accordance with the appended claims and their equivalents.

Claims

1. A disc spring shock absorber, characterized in that: It adopts disc spring type configuration and includes: The side wall is an aspherical surface, and the inner curvature radius R of the side wall is i 110 to 130 mm, outer curvature radius R O Determined according to the following formula: R o =R i +b e , Among them, b e is the effective thickness of the side wall, g s is the system impact acceleration, m s is the mass of the vibration-damped link, P M is the yield strength of the disc spring shock absorber, l δ is the average of the inner arc length and the outer arc length in the side wall section; an upper end surface, which is provided at the first end of the side wall and is an annular plane; and The lower end surface is arranged at the second end of the side wall opposite to the first end thereof and is an annular plane, wherein the diameter of the lower end surface is larger than that of the upper end surface.

2. The disc spring type shock absorber according to claim 1, characterized in that: The height of the side wall is 10 mm.

3. The disc spring type shock absorber according to claim 1, wherein: The lower end surface includes a plurality of bosses, which are circumferentially distributed on the lower end surface, and the edges of the bosses do not exceed the edges of the lower end surface.

4. The disc spring type shock absorber according to claim 3, wherein: The cross section of the boss is trapezoidal.

5. The disc spring type shock absorber according to claim 1, wherein: The shock absorber is made of titanium-based superelastic alloy and is manufactured by an ultra-high temperature hot pressing integrated molding process.

6. A stacked vibration reduction module, characterized in that: The invention comprises a plurality of vibration absorbers according to any one of claims 1 to 5, wherein the vibration absorbers are stacked in sequence.

7. The stacked vibration damping module according to claim 6, wherein: The number of the shock absorbers is 1 to 3.

8. The stacked vibration damping module according to claim 6, wherein: The shock absorbers are stacked in the same direction.

9. The stacked vibration damping module according to claim 6, wherein: The shock absorbers are stacked alternately in forward and reverse directions.

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