Belleville spring set with lubricating film and quasi-zero stiffness combined spring using belleville spring set with lubricating film

Abstract

The utility model discloses a belleville spring set with a lubricating film and a quasi-zero stiffness combined spring using the belleville spring set with the lubricating film. The lubricating film can reduce the friction between the overlapped contact surfaces of the disc springs through the lubricating effect of the lubricating film, the dynamic stiffness of the disc spring group device under the micro-vibration condition is reduced, and the vibration isolation system can obtain a better vibration control effect. The spiral spring is installed in the outer cylinder, and the belleville spring set with the lubricating film is installed on the outer cylinder. When the guide column slides, the spiral spring in the outer cylinder and the belleville spring set on the guide column can be compressed at the same time, the negative stiffness characteristic can be obtained by adopting different overlapping and involution combinations of the belleville spring, and the spiral spring is further combined to achieve the high-performance vibration reduction, vibration isolation and vibration double-control effect of the quasi-zero stiffness principle.

Description

Technical Field

[0001] The utility model relates to the technical field of shockproofing, and more specifically, to a disc spring group with a lubricating film and a quasi-zero stiffness combined spring using the disc spring group with a lubricating film. Background Art

[0002] Although traditional passive control technology has the advantages of simple structure, low cost, and good robustness, it cannot effectively cope with multi-type, wide-frequency vibration excitations due to the narrow effective control bandwidth of vibration reduction technology based on linear principles. Quasi-zero stiffness isolators are an important technical means to break through the traditional linear vibration isolation principle and achieve low-frequency vibration isolation. This type of vibration isolation system has a nonlinear elastic restoring force curve, which can produce a large "static stiffness", making the static displacement of the system smaller under the action of vertical gravity; at the same time, it also has a small "dynamic stiffness", that is, the characteristic frequency of the vibration isolation system is low, which can solve the contradiction between the bearing capacity of the vertical device and the extension of the system period to a certain extent.

[0003] In quasi-zero stiffness isolators, disc springs have the advantages of strong load-bearing capacity and convenient combination and use, and have been widely used. However, the traditional disc spring parallel connection will cause a stick-slip phenomenon on the contact surface. The stick-slip phenomenon here refers to the fact that the friction force of the contact surface under the action of constant traction force generally remains constant or approximately constant. However, in some cases, the friction force will fluctuate over time. This friction force is related to the disc spring combination method, the number of overlapping disc springs, the surface quality of the disc springs, and the lubrication conditions. Due to the damping effect of friction, the stiffness of the overlapping combination disc spring increases and the deformation of the combined disc spring decreases successively, which will affect the load-deformation relationship of the disc spring group, resulting in poor vibration reduction effect. Utility Model Content

[0004] The utility model overcomes the deficiency of the prior art that the disc spring contact surface may have a stick-slip phenomenon, and provides a disc spring group with a lubricating film and a quasi-zero stiffness combined spring using the disc spring group with a lubricating film, in the hope of solving the problems existing in the prior art.

[0005] On one hand, the utility model provides a disc spring group with a lubricating film.

[0006] A disc spring assembly with a lubricating film, comprising a disc spring and a lubricating film;

[0007] The number of the disc springs is greater than 1, and the multiple disc springs are stacked in the same direction, and a lubricating film is provided between the contact surfaces of the stacked disc springs.

[0008] The membrane made of anti-friction material can reduce the friction at the overlapping interface of the disc spring and partially eliminate the stick-slip phenomenon of the disc spring combination.

[0009] A further technical solution is that the lubricating film is one of polytetrafluoroethylene film, polyurethane, polyamide, and polyoxymethylene materials.

[0010] A quasi-zero stiffness combined spring comprises the disc spring group with lubricating film, a loading ring, a spiral spring, a guide device, and an outer cylinder as described above;

[0011] The front end of the guide device is a guide column, the diameter of the guide column is consistent with the inner diameter of the outer cylinder, and the rear end of the guide device is a limit plate;

[0012] The coil spring is installed in the outer cylinder, the guide column is partially sleeved in the outer cylinder and installed above the coil spring, and the front part of the guide column abuts against the coil spring;

[0013] The guide column is provided with a disc spring group with a lubricating film, and the disc spring group with a lubricating film is installed between the upper part of the outer cylinder and the limiting plate;

[0014] The loading ring comprises an end loading ring, which is installed between the disc spring group with lubricating film and the upper part of the outer cylinder, and between the disc spring group with lubricating film and the limiting plate.

[0015] The guide column can slide in the outer cylinder. When the guide column slides, the coil spring in the outer cylinder and the disc spring group on the guide column can be compressed at the same time. By using different overlapping and matching combinations of disc springs, negative stiffness characteristics can be obtained, and further combined with the coil spring to realize high-performance vibration reduction, vibration isolation and dual vibration control based on the quasi-zero stiffness principle.

[0016] Among them, the lubricating film made of anti-friction materials such as polytetrafluoroethylene (PTFE) and polyurethane can reduce the friction between the overlapping contact surfaces of the disc springs through its lubricating effect, reduce the dynamic stiffness of the disc spring assembly under micro-vibration conditions, and help the vibration isolation system obtain better vibration control effects.

[0017] The end loading ring is installed between the disc spring group with lubricating film and the upper part of the outer cylinder, and between the disc spring group with lubricating film and the limit plate, and plays the role of transferring load and reducing the influence of deformation limitation.

[0018] A further technical solution is that the loading ring further comprises an outer loading ring, and the outer loading ring is installed between disc spring groups with lubricating films installed in different directions.

[0019] The outer loading ring can transfer load and reduce the influence of deformation restriction, and the outer loading ring can prevent displacement between the disc spring groups with lubricating films installed in a matched manner, thereby playing a positioning role.

[0020] A further technical solution is that the loading ring further comprises an inner loading ring, and the inner loading ring is installed between disc spring groups with lubricating films which are installed in opposite directions.

[0021] The inner loading ring can also transfer load and reduce the influence of deformation limitation, and the inner loading ring can prevent displacement between disc spring groups with lubricating films installed in opposite directions, thus playing a positioning role.

[0022] A further technical solution is that the disc spring group with lubricating film is composed of two disc springs overlapped in the same direction, and a lubricating film is provided between the contact surfaces of the overlapped disc springs;

[0023] Two disc spring groups with lubricating films are installed in pairs, and an external loading ring is installed between the disc spring groups with lubricating films to form a disc spring unit;

[0024] At least two disc spring units are installed on the guide column, and an inner loading ring is installed between the disc spring units;

[0025] An end loading ring is installed between the disc spring unit and the limiting plate, and an end loading ring is installed between the disc spring unit and the upper part of the outer cylinder.

[0026] Disc springs have variable stiffness characteristics. By changing the ratio of the height of the inner truncated cone of the disc to the thickness of the disc, different spring characteristic curves can be obtained, which can be linear, increasing, decreasing, or a combination of them. In addition, variable stiffness characteristics can be obtained by combining discs of different thicknesses or by combining discs with different numbers of discs. The installation method of disc spring units includes both matching installation and overlapping installation, which realizes flexible combination and is relatively convenient to install. The use of three loading rings also better realizes the effect of transferring load and reducing deformation.

[0027] A further technical solution is that a positioning hole is provided in the middle of the disc spring, the lubricating film and the loading ring;

[0028] The diameter of the positioning hole is consistent with the diameter of the guide column.

[0029] By setting the positioning hole, the disc spring, the lubricating film and the loading ring can be fixed on the guide column.

[0030] Compared with the prior art, the utility model has at least the following beneficial effects: the utility model installs a lubricating film made of anti-friction materials such as polytetrafluoroethylene and polyurethane in the laminated disc springs, which can reduce the friction between the laminated contact surfaces of the disc springs through its lubricating effect, reduce the dynamic stiffness of the disc spring assembly under micro-vibration conditions, and is conducive to the vibration isolation system to obtain better vibration control effects. The coil spring is installed in the outer cylinder, and the disc spring assembly with the lubricating film is installed on it. When the guide column slides, the coil spring in the outer cylinder and the disc spring assembly on the guide column can be compressed at the same time. By using different overlapping and matching combinations of disc springs, negative stiffness characteristics can be obtained, and further combined with the coil spring to achieve the high-performance vibration reduction, vibration isolation and vibration dual control effects of the quasi-zero stiffness principle. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a structural diagram of Embodiment 1;

[0032] Figure 2 This is a structural diagram of Embodiment 2;

[0033] Figure 3 This is a schematic diagram of the cross-sectional structure of Embodiment 2;

[0034] Figure 4 It is a schematic diagram of the disc spring unit structure;

[0035] Figure 5 Structural schematic diagram of embodiment 3;

[0036] In the figure, 1-disc spring group with lubricating film, 11-disc spring, 12-lubricating film, 2-loading ring, 21-end loading ring, 22-outer loading ring, 23-inner loading ring, 3-helical spring, 4-guide device, 5-outer cylinder. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0038] Embodiment 1

[0039] A disc spring assembly 1 with a lubricating film, see Figure 1 , including a disc spring 11 and a lubricating film 12;

[0040] The number of the disc springs 11 is greater than 1, and the multiple disc springs are stacked in the same direction, and a lubricating film 12 is provided between the contact surfaces of the stacked disc springs.

[0041] The lubricating film 12 is one of polytetrafluoroethylene film, polyurethane, polyamide, and polyoxymethylene. In this embodiment, the lubricating film 12 is a polytetrafluoroethylene film.

[0042] Embodiment 2

[0043] A quasi-zero stiffness combined spring, see Figure 2 , Figure 3 , comprising the disc spring group 1 with lubricating film, a loading ring 2, a coil spring 3, a guide device 4, and an outer cylinder 5 as described above;

[0044] The front end of the guide device 4 is a guide column, the diameter of the guide column is consistent with the inner diameter of the outer cylinder 5, and the rear end of the guide device 4 is a limit plate;

[0045] The coil spring 3 is installed in the outer tube 5, and the guide column is partially sleeved in the outer tube 5 and installed above the coil spring 3, and the front part of the guide column abuts against the coil spring 3;

[0046] The guide column is provided with a disc spring group 1 with a lubricating film, and the disc spring group 1 with a lubricating film is installed between the upper part of the outer cylinder 5 and the limit plate;

[0047] The loading ring 2 comprises an end loading ring 21, an outer loading ring 22 and an inner loading ring 23. The end loading ring 21 is installed between the disc spring group 1 with lubricating film and the upper part of the outer cylinder 5, and between the disc spring group 1 with lubricating film and the limit plate.

[0048] The outer loading ring 22 is installed between the disc spring groups 1 with lubricating films installed in different directions.

[0049] The inner loading ring 23 is installed between disc spring groups 1 with lubricating films which are installed in opposite directions.

[0050] It should be noted that as long as the disc spring group 1 with lubricating film can be installed by matching, anti-matching, and overlapping, different stiffness characteristics can be achieved, and then different coil springs 3 can be matched to achieve quasi-zero stiffness. As long as the loading ring 2 is added in different combinations, positioning and load transfer can be achieved and deformation can be reduced.

[0051] In this embodiment, the disc spring set 1 with lubricating film is composed of two disc springs 11 stacked in the same direction, and a lubricating film 12 is provided between the contact surfaces of the stacked disc springs;

[0052] Two disc spring groups 1 with lubricating films are installed in pairs, and an outer loading ring 22 is installed between the disc spring groups 1 with lubricating films to form a disc spring unit. Figure 4 ;

[0053] At least two disc spring units are installed on the guide column, and an inner loading ring 23 is installed between the disc spring units;

[0054] In this embodiment, two disc spring units are installed on the guide column.

[0055] An end loading ring 21 is installed between the disc spring unit and the limiting plate, and an end loading ring 21 is installed between the disc spring unit and the upper part of the outer cylinder 5 .

[0056] Positioning holes are provided among the disc spring 11, the lubricating film 12 and the loading ring 2;

[0057] The diameter of the positioning hole is consistent with the diameter of the guide column.

[0058] Embodiment 3

[0059] See also Figure 5 The only difference between the third embodiment and the second embodiment is that three disc spring units are installed on the guide column.

[0060] Under the condition that other conditions are the same, according to the analysis of the loading test conditions, the equivalent stiffness of the disc spring combination of Example 3 is lower than that of the two disc spring unit combinations of Example 2. Under the condition of bearing the same magnitude of force, the deformation of the disc spring combination of Example 3 is about 1.5 times that of the disc spring combination of Example 2, and its deformation capacity is also improved.

[0061] In actual engineering, the number of disc spring units to be stacked and matched can be designed according to the load and energy consumption requirements. When in use, because the disc spring 11 is a component for load transmission and consumption, increasing the number of disc spring stacks and groups will double the load and energy consumption capacity.

[0062] In actual engineering, the number of disc spring units to be stacked and matched can be designed according to the load and energy consumption requirements. When in use, because disc springs are load transmission and consumption components, increasing the number of disc spring stacks and groups will double the load and energy consumption capabilities.

[0063] Although the utility model is described herein with reference to the illustrative embodiments of the utility model, it should be understood that those skilled in the art can design many other modifications and implementations, which will fall within the scope and spirit of the principles disclosed in the present application. More specifically, within the scope disclosed in the present application, multiple variations and improvements can be made to the components and / or layout of the subject combination layout. In addition to the variations and improvements made to the components and / or layout, other uses will also be obvious to those skilled in the art.

Claims

1. A disc spring assembly with a lubricating film, characterized in that: Including disc spring and lubricating film; The number of disc springs is greater than 1, and the multiple disc springs are overlapped in the same direction, and a lubricating film is arranged between the contact surfaces of the overlapped disc springs; the lubricating film is one of polytetrafluoroethylene film, polyurethane, polyamide, and polyoxymethylene material.

2. A quasi-zero stiffness combined spring, characterized in that: It comprises the disc spring assembly with lubricating film as claimed in claim 1, a loading ring, a coil spring, a guide device, and an outer cylinder; The front end of the guide device is a guide column, the diameter of the guide column is consistent with the inner diameter of the outer cylinder, and the rear end of the guide device is a limit plate; The coil spring is installed in the outer cylinder, the guide column is partially sleeved in the outer cylinder and installed above the coil spring, and the front part of the guide column abuts against the coil spring; The guide column is provided with a disc spring group with a lubricating film, and the disc spring group with a lubricating film is installed between the upper part of the outer cylinder and the limiting plate; The loading ring comprises an end loading ring, which is installed between the disc spring group with lubricating film and the upper part of the outer cylinder, and between the disc spring group with lubricating film and the limiting plate.

3. A quasi-zero stiffness combined spring as claimed in claim 2, characterized in that: The loading ring also includes an outer loading ring, which is installed between disc spring groups with lubricating films that are installed in pairs in different directions.

4. A quasi-zero stiffness combined spring as claimed in claim 3, characterized in that: The loading ring also includes an inner loading ring, which is installed between disc spring groups with lubricating films that are installed in opposite directions.

5. A quasi-zero stiffness combined spring as claimed in claim 4, characterized in that: The disc spring group with lubricating film is composed of two disc springs stacked in the same direction, and a lubricating film is provided between the contact surfaces of the stacked disc springs; Two disc spring groups with lubricating films are installed in pairs, and an external loading ring is installed between the disc spring groups with lubricating films to form a disc spring unit; At least two disc spring units are installed on the guide column, and an inner loading ring is installed between the disc spring units; An end loading ring is installed between the disc spring unit and the limiting plate, and an end loading ring is installed between the disc spring unit and the upper part of the outer cylinder.

6. A quasi-zero stiffness combined spring as claimed in claim 4, characterized in that: Positioning holes are arranged in the middle of the disc spring, the lubricating film and the loading ring; The diameter of the positioning hole is consistent with the diameter of the guide column.

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