Vehicle-mounted hydrogen storage cylinder vibration isolation protection device for new energy vehicle

Abstract

The invention relates to a vehicle-mounted hydrogen storage cylinder vibration isolation protection device for a new energy vehicle. The device comprises a broadband vibration isolation structure and a space vibration isolation structure. The broadband vibration isolation structure is composed of a metal rubber-silicone rubber annular vibration isolator and a variable damping-spring negative stiffness vibration isolator. The space vibration isolation structure is composed of a metal rubber-silicone rubber annular vibration isolator, a variable damping-spring negative stiffness vibration isolator and a composite damping plate limiting protection structure. The broadband vibration isolation structure is provided with multiple sets of metal rubber-silicon rubber vibration isolation elements which are used for being annularly and symmetrically installed on the circumference of a gas cylinder through two clamps, and vibration isolation protection of 20-100 Hz frequency band road surface excitation is achieved. The damping-spring negative stiffness vibration isolator generates negative stiffness when low-frequency vibration of 0.1 Hz to 20 Hz occurs and implements a low-frequency vibration isolation protection function, and the annular vibration isolator and the variable damping-spring negative stiffness cooperate to achieve a broadband vibration isolation effect of the bandwidth of 0.1 Hz to 100 Hz. By applying the device, space vibration isolation and broadband vibration isolation can be achieved at the same time, and the device is generally suitable for all road excitation and actual working conditions of vehicle-mounted tools.

Description

Technical Field

[0001] The present disclosure relates to the technical field of new energy vehicles, and in particular to a vibration isolation and protection device for a hydrogen storage cylinder mounted on a new energy vehicle. Background Art

[0002] As a clean energy means of transportation, hydrogen vehicles have received widespread attention around the world. The hydrogen vehicle industry has been identified as an important part of the national energy system and an important carrier for achieving green and low-carbon transformation. The development prospects of hydrogen vehicles are positive. With technological progress, cost reduction and policy support, hydrogen vehicles are expected to play a more important role in the future transportation field. At the same time, the technical problems of hydrogen energy systems have gradually become prominent. Hydrogen has the characteristics of flammability and explosiveness. Compared with the original method of only simple vibration isolation pads and binding hydrogen cylinders, a series of safety protection measures need to be taken to ensure the safe operation of the hydrogen energy system. Therefore, vibration isolation protection of on-board hydrogen storage cylinders is a key research direction.

[0003] Since the fuel cell vehicle-mounted hydrogen storage system is installed on the vehicle, the vehicle will be subject to vibration and impact during operation. The unevenness of the road surface usually causes the vehicle to vibrate in the low-frequency range, and the impact may involve a wider frequency range, including high-frequency components. In CN215284380U, the buffer spring on the telescopic rod effectively reduces the bumps during the vehicle's driving and improves the stability of the hydrogen cylinder, but the vibration reduction effect is single and the damping energy consumption performance is poor; in CN215850744U, a shock-absorbing protection device for hydrogen cylinders of hydrogen energy-powered vehicles is provided. When the hydrogen cylinder vibrates, elastic buffer protection is achieved by transferring vibration energy to the buffer protection spring. The device only absorbs vibration energy through the compression of the buffer protection spring; in CN210161902U, a shock-absorbing protection device for hydrogen cylinders of hydrogen energy-powered vehicles is disclosed. It mainly uses two sets of rubber pads and springs as vibration reduction elements. Except for the main vibration direction, the vibration protection effect in multiple directions under various working conditions is insufficient. To ensure the safe operation of the on-board hydrogen storage system, it is necessary to carry out all-round and effective vibration isolation protection for the hydrogen storage cylinders according to the actual operating conditions of the vehicle, take buffer protection measures, and focus on protecting the valves and hoses to prevent displacement or damage during use, thereby ensuring their safety performance.

[0004] In summary, the prior art lacks a device that provides lateral, longitudinal and multi-directional vibration isolation protection for hydrogen storage cylinders during transportation. Summary of the invention

[0005] In order to solve the technical problems existing in the background technology, the present disclosure proposes a vibration isolation and protection device for on-board hydrogen storage cylinders for new energy vehicles. The device realizes vibration isolation and protection for hydrogen storage cylinders in the lateral, longitudinal and multiple directions during transportation by designing a metal rubber-silicone rubber annular vibration isolator, combining a variable damping-spring negative stiffness vibration isolator and a composite damping plate protection layer. It has a good damping and energy dissipation effect on the medium and high frequency vibrations of the vehicle under the vibration and impact in the low-frequency range, and greatly improves the application safety of hydrogen storage cylinders on-board hydrogen energy new energy vehicles.

[0006] The present disclosure provides a vibration isolation and protection device for a hydrogen storage cylinder mounted on a new energy vehicle, comprising a broadband vibration isolation structure, which is unique in that: the device also comprises a spatial vibration isolation structure;

[0007] The broadband vibration isolation structure is composed of a metal rubber-silicon rubber annular vibration isolator and a variable damping-spring negative stiffness vibration isolator;

[0008] The spatial vibration isolation structure is composed of a metal rubber-silicon rubber annular vibration isolator, a variable damping-spring negative stiffness vibration isolator and a composite damping plate limit protection structure; the combined action of the structure as a whole plays a role in spatial vibration isolation.

[0009] Further, the metal rubber-silicone rubber annular vibration isolator comprises a plurality of groups of metal rubber-silicone rubber vibration isolation elements;

[0010] The metal rubber-silicon rubber vibration isolation element can be symmetrically installed on the circumference of the gas cylinder through a clamp, and is used for vibration isolation protection against road surface excitation in a frequency band of 20Hz-100Hz;

[0011] The variable damping-spring negative stiffness vibration isolator comprises a variable damper and two sets of upper and lower transverse compression springs and a horizontal spring;

[0012] The variable damping-spring negative stiffness vibration isolator is used to play a low-frequency vibration isolation protection function when low-frequency vibration of 0.1Hz-20Hz occurs; wherein, the variable damper provides an adjustable support force in the vertical direction, and the two ends of the upper and lower groups of transverse compression springs are respectively welded to the base and the slider, and are in a balanced state after the hydrogen storage cylinder is placed;

[0013] The horizontal spring is used to generate an axial inward contraction force to resist the upward displacement and deformation of the structure when the structure is vibrated upward by external excitation, and to generate an axial outward force to resist the downward displacement and deformation of the structure when the structure is vibrated downward by external excitation, thereby realizing the adjustment of the damping force.

[0014] Furthermore, the stiffness k of the horizontal spring is less than 0, and the force generated is opposite to the direction of the structural vibration displacement, thereby playing a role in resisting deformation. The annular vibration isolator and the variable damping-spring negative stiffness vibration isolator play a vertical support vibration isolation and low-frequency vibration isolation protection function under excitation, and synergistically achieve a wide-band vibration isolation effect with a bandwidth of 0.1-100Hz.

[0015] Furthermore, the spatial vibration isolation structure is provided with a positioning groove for realizing circumferential fixation of the clamp; multiple groups of metal rubber-silicone rubber vibration isolation elements are arranged 360° symmetrically in the positioning groove, and the 360-degree circumferential vibration isolation stiffness is adjusted by adjusting the clamp preload; the variable damping-spring negative stiffness vibration isolator is used to realize the isolation of the longitudinal main vibration.

[0016] Preferably, the metal rubber-silicone rubber vibration isolation element is made by infiltrating a silicone rubber raw material solution into the internal gap of the metal rubber by vacuum infiltration; and the outer surface of the metal rubber-silicone rubber element is silicone rubber.

[0017] Furthermore, the composite damping plate limiting protection structure includes two sets of metal rubber-silicone rubber composite damping plates, which are arranged at the left and right ends of the protection device to provide support, limiting and vibration isolation for the gas cylinder during axial movement;

[0018] The silicone rubber material of the outer layer of the metal rubber-silicone rubber composite damping plate can isolate the bottle body from direct contact with the metal wire of the metal rubber, thereby avoiding surface scratches when the gas cylinder moves axially.

[0019] As described below, at least one of the above technical solutions adopted in one or more embodiments of this specification can achieve the following beneficial effects:

[0020] The protection device is provided with two structures, namely a wide-band vibration isolation structure and a spatial vibration isolation structure. The wide-band vibration isolation structure is composed of a metal rubber-silicone rubber annular vibration isolator and a variable damping-spring negative stiffness vibration isolator, and the spatial vibration isolation structure is composed of a metal rubber-silicone rubber annular vibration isolator, a variable damping-spring negative stiffness vibration isolator and a composite damping plate limit protection structure, which play a spatial vibration isolation role as a whole through the combined action. In the wide-band vibration isolation component, considering the horizontal installation mode of the hydrogen storage cylinder, multiple groups of metal rubber-silicone rubber vibration isolation elements are symmetrically installed on the circumference of the cylinder through two clamps, which are mainly used for vibration isolation protection against 20Hz-100Hz frequency band road excitation. The variable damping-spring negative stiffness vibration isolator generates negative stiffness and implements low-frequency vibration isolation protection function when low-frequency vibration of 0.1Hz-20Hz occurs. The annular vibration isolator and the variable damping-spring negative stiffness cooperate to achieve a wide-band vibration isolation effect with a bandwidth of 0.1-100Hz. In the spatial vibration isolation assembly, considering the actual working conditions of the hydrogen storage cylinder on bumpy roads, there are lateral, longitudinal and spatial excitation effects from multiple directions. The traditional clamp is used for circumferential fixation, but the clamp and the cylinder are not in "hard contact". Instead, multiple groups of metal rubber-silicone rubber elastic elements are arranged symmetrically around the ring 360 degrees. The 360-degree circumferential vibration isolation stiffness is adjusted by adjusting the clamp preload. The variable damping-spring negative stiffness isolator is mainly responsible for the isolation of the longitudinal main vibration. Considering the risk of axial collision of the hydrogen storage cylinder in extremely serious accidents such as collisions and rollovers, two groups of metal rubber-silicone rubber damping plates are arranged at the head and tail of the cylinder to protect against axial impact and large load vibration.

[0021] This type of protection device not only achieves spatial vibration isolation, but also realizes the broadband vibration isolation of the hydrogen storage cylinder in the bandwidth of 0.1-100Hz under road excitation. It is applicable to almost all forms of road excitation and possible actual working conditions of vehicle-mounted tools. At the same time, based on the porous properties of new materials such as metal rubber and composite materials, it realizes the requirements of lightweight, high load-bearing, high temperature resistance and corrosion resistance when the vibration isolation protection structure is installed on the vehicle. Compared with the traditional installation and protection methods of hydrogen storage cylinders, it greatly improves the safety of hydrogen energy new energy vehicles.

[0022] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0023] Further features and aspects of the present disclosure will become apparent from the following detailed description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings herein are incorporated into the specification and constitute a part of the specification. These drawings illustrate embodiments consistent with the present disclosure and are used to illustrate the technical solutions of the present disclosure together with the specification.

[0025] Figure 1This is an overall structural diagram of a vibration protection device for an on-board hydrogen storage cylinder for a new energy vehicle as disclosed in the present invention.

[0026] Figure 2 It is a schematic diagram of the metal rubber-silicone rubber annular vibration isolator and the variable damping-spring negative stiffness vibration isolator described in the present invention.

[0027] Figure 3 It is a schematic diagram of the composite damping plate limiting vibration isolation structure disclosed in the present invention.

[0028] Figure 4 The figure is a schematic diagram of the protective outer frame structure of the protective device disclosed in the present invention.

[0029] Figure 5 The figure is a schematic diagram of the vibration isolation frame structure of the protective device disclosed in the present invention.

[0030] Figure 6 The diagram is a schematic diagram of the baffle structure of the protective device disclosed in the present invention.

[0031] Figure 7 It is a schematic diagram of the structure of the transverse spring of the protective device disclosed in the present invention.

[0032] Figure 8 It is a schematic diagram of the structure of the magnetorheological damper of the protective device disclosed in the present invention.

[0033] Fig. 9 It is a schematic structural diagram of the sleeve of the protective device disclosed in the present invention.

[0034] Fig.10 The figure is a schematic diagram of the structure of the metal rubber-silicone rubber protective device disclosed in the present invention.

[0035] Fig.11 It is a schematic diagram of the crossbeam structure of the protective device disclosed in the present invention.

[0036] Fig.12 The figure is a schematic diagram of the support rod structure of the protective device disclosed in the present invention.

[0037] In the figure, 1-protective outer frame, 2-vibration isolation frame, 3-baffle, 4-lateral spring, 5-magnetorheological damper, 6-screw, 7-fastening bolt, 8-composite damping plate, 9-sleeve, 10-metal rubber-silicone rubber, 11-hydrogen storage cylinder, 12-crossbeam, 13-support rod, 14-hydrogen storage cylinder valve, 15-sealing strip. DETAILED DESCRIPTION

[0038] Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0039] In addition, in order to better illustrate the present disclosure, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present disclosure can also be implemented without certain specific details. In some examples, methods and means well known to those skilled in the art are not described in detail in order to highlight the main purpose of the present disclosure.

[0040] The present disclosure provides a vibration isolation and protection device for a hydrogen storage cylinder on a vehicle for a new energy vehicle, including a metal rubber-silicone rubber annular vibration isolator, a variable damping-spring negative stiffness vibration isolator, and a composite damping plate limit protection structure. The on-board hydrogen storage cylinder is installed inside the protection device, and a device consisting of two semi-annular metal rubber-silicone rubber annular vibration isolators in parallel is installed above and below the on-board hydrogen storage cylinder. The vibration isolation element is a radially installed elastic porous material metal rubber-silicone rubber, which is a composite damping vibration reduction structural material prepared by Ren Zhiying's team at Fuzhou University. It is evenly installed in the positioning frame groove with a circumferential distribution and has good damping energy dissipation characteristics. The upper and lower devices are connected by bolts, and a 3-5mm pre-tightening spacing is left after the upper and lower half rings are assembled to pre-tighten and adjust the installation state of the hydrogen storage cylinder. Below the metal rubber-silicone rubber annular vibration isolator is a variable damping-spring negative stiffness vibration isolator, including a vibration isolation frame, a crossbeam, a support rod, a sleeve, a horizontal spring, and a magnetorheological damper. The semicircular groove in the vibration isolation frame is the installation position of the metal rubber-silicone rubber, the bottom of the outer diameter is hinged to the support rod, and the other end of the support rod is a sleeve, which performs horizontal displacement movement on the bottom crossbeam. At the same time, the outer ends of the sleeve are welded to the symmetrically distributed transverse springs on the crossbeam, and the other end of the transverse spring is welded to the positioning block; the magnetorheological damper is symmetrically distributed, and the upper and lower ends are respectively installed in the positioning groove of the upper frame and the frame positioning groove. The variable damper provides adjustable supporting force in the vertical direction. The two ends of the upper and lower groups of transverse compression springs are respectively welded to the base and the slider. After the hydrogen storage cylinder is placed, it is in a balanced state. When the structure is subjected to external excitation vibration and produces upward displacement, the horizontal spring generates an axial inward contraction force to resist the upward displacement deformation of the structure; when the structure is subjected to external excitation vibration and produces downward displacement, the horizontal spring generates an axial outward force to resist the downward displacement deformation of the structure. According to Hooke's theorem, the stiffness of the horizontal spring k is less than 0, and the force generated is opposite to the direction of the structural vibration displacement, which plays a role in resisting deformation. The annular vibration isolator and the variable damping-spring negative stiffness vibration isolator play the role of vertical support vibration isolation and low-frequency vibration isolation protection under excitation, and synergistically achieve a wide-band vibration isolation effect with a bandwidth of 0.1-100Hz. The arc-shaped composite damping plate is installed at both ends of the frame to limit the horizontal position and absorb vibration of the hydrogen storage cylinder.

[0041] Two sets of parallel semi-ring metal rubber-silicone rubber vibration isolators are symmetrically arranged and can be pre-tightened by adjusting bolts to surround the hydrogen storage cylinder 360 degrees, thereby isolating and fixing the cylinder in the circumferential direction.

[0042] A negative stiffness vibration isolation mechanism consisting of two groups of variable dampers and horizontal springs is combined with a semi-ring metal rubber-silicon rubber annular vibration isolator to form an axial double-layer vibration isolation.

[0043] Arc-shaped composite damping plates are installed at both ends of the protective frame, and a hole is opened in the middle to reserve a valve position, which plays a role in energy absorption and vibration isolation in the axial direction of the bottle body and horizontal limitation. At the same time, the outer silicone rubber material can isolate the bottle body from direct contact with the metal wire of the metal rubber, avoiding surface scratches when the gas cylinder moves axially.

[0044] This type of vibration isolation and protection device for hydrogen storage cylinders on new energy vehicles can achieve two major functions: broadband vibration isolation and spatial vibration isolation. The vibration isolation and protection module is divided into two parts, including a broadband vibration isolation component and a spatial vibration isolation component. The subdivision structure is a metal rubber-silicone rubber annular vibration isolator, a variable damping-spring negative stiffness vibration isolator, and a composite damping plate limit protection structure. In the spatial vibration isolation component, considering the actual working conditions of the hydrogen storage cylinder on bumpy roads, there are lateral, longitudinal and spatial excitations from multiple directions. The traditional clamp is used for circumferential fixation, but the clamp and the cylinder are not in "hard contact" but a plurality of groups of metal rubber-silicone rubber elastic elements are arranged symmetrically 360 degrees around the ring. The 360-degree circumferential vibration isolation stiffness is adjusted by adjusting the clamp preload. The variable damping-spring negative stiffness vibration isolator is mainly responsible for the isolation of the longitudinal main vibration. Compared with the metal plate and foam plate that are used to seal the vibration isolation frame in all directions, only two sets of metal rubber-silicone rubber damping plates are used on the end face of the vibration isolation device, which are lightweight, high temperature and corrosion resistant, high bearing capacity and damping energy dissipation capacity, and provide support, limit and vibration isolation for the gas cylinder during axial movement. At the same time, the outer silicone rubber material can isolate the direct contact between the bottle body and the metal wire of the metal rubber, avoiding surface scratches when the gas cylinder moves axially, and improving the safety of the use of hydrogen storage cylinders. The three vibration isolation methods are used to reduce the vibration energy of the on-board hydrogen storage cylinders under normal road excitation or sudden braking, collision and other working conditions, greatly improving the application safety of hydrogen storage cylinders on-board hydrogen energy new energy vehicles.

[0045] The following is combined with Figures 1 to 3 , the technical solution is described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection.

[0046] like Figure 1-3As shown, the present invention is an on-board hydrogen storage cylinder vibration protection device for new energy vehicles, including a protection outer frame 1, the 1201 end of the cross beam 12 is fixed to the protection outer frame 1 with a nut, the transverse spring 4 and the sleeve 9 are simultaneously sleeved on the cross beam 12, the 401 end of the transverse spring 4 is welded to the protection outer frame, the 402 end is connected to the sleeve 9, the 501 end of the magnetorheological damper 5 is connected to the protection outer frame 1 through a hinge, and the 502 end is hinged to the vibration isolation frame 2.

[0047] The support rod 13 is hingedly connected with the sleeve 9 and the bottom of the vibration isolation frame 2. The vibration isolation frame 2 is grooved inside, and the metal rubber-silicone rubber 10 is evenly installed in the vibration isolation frame groove in the circumferential direction. The baffle 3 is symmetrically installed on the end face of the vibration isolation frame 2 and fixed with screws 6 to prevent the metal rubber-silicone rubber 10 from axial movement. The transverse spring 4 and the composite damping plate 8 are symmetrically installed on the two end faces inside the protective outer frame 1. The middle opening contacts the end face of the hydrogen storage cylinder 11, which plays the role of axial horizontal limit and vibration isolation. The upper and lower protective outer frames are connected by fastening bolts 7. The upper and lower groups of parallel semi-ring metal rubber-silicone rubber isolators are symmetrically arranged, and the pre-tightening can be adjusted by bolts to surround the hydrogen storage cylinder body 360 degrees, playing the role of vibration isolation and fixation in the circumferential direction of the bottle body.

[0048] During specific use, the hydrogen storage cylinder is placed in the vibration isolation device, the preload of the metal rubber-silicone rubber annular vibration isolator is adjusted, and the protective outer frame is tightened. When the vehicle body is bumpy due to uneven road conditions, or when the vehicle is emergency braked or collides, the metal rubber-silicone rubber annular vibration isolator has an effective energy-dissipating vibration isolation effect in the radial direction of the hydrogen storage cylinder, and the negative stiffness spring vibration isolation assembly has a vibration isolation effect in the vertical direction to the ground. The composite damping plate limit vibration isolation structure at both ends contacts the end face of the hydrogen storage cylinder, and plays an axial horizontal limit and vibration isolation role. The combination of the three vibration isolation structures effectively absorbs vibration energy, reduces the vibration impact on the onboard hydrogen storage cylinder during driving, and greatly improves the application safety of onboard hydrogen storage cylinders in hydrogen energy new energy vehicles during transportation or use.

[0049] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A vibration isolation and protection device for a hydrogen storage cylinder mounted on a new energy vehicle, comprising a broadband vibration isolation structure, characterized in that: The device also includes a spatial vibration isolation structure; The broadband vibration isolation structure is composed of a metal rubber-silicon rubber annular vibration isolator and a variable damping-spring negative stiffness vibration isolator; The spatial vibration isolation structure is composed of a metal rubber-silicon rubber annular vibration isolator, a variable damping-spring negative stiffness vibration isolator and a composite damping plate limit protection structure; the combined action of the structure as a whole plays a role in spatial vibration isolation.

2. The vibration isolation protection device for a hydrogen storage cylinder for a new energy vehicle according to claim 1 is characterized in that: The metal rubber-silicone rubber annular vibration isolator comprises a plurality of groups of metal rubber-silicone rubber vibration isolation elements; The metal rubber-silicon rubber vibration isolation element can be symmetrically installed on the circumference of the gas cylinder through a clamp, and is used for vibration isolation protection against road surface excitation in a frequency band of 20Hz-100Hz; The variable damping-spring negative stiffness vibration isolator comprises a variable damper and two sets of upper and lower lateral compression springs and a horizontal spring; The variable damping-spring negative stiffness vibration isolator is used to play a low-frequency vibration isolation protection function when low-frequency vibration of 0.1Hz-20Hz occurs; wherein, the variable damper provides an adjustable support force in the vertical direction, and the two ends of the upper and lower groups of transverse compression springs are respectively welded to the base and the slider, and are in a balanced state after the hydrogen storage cylinder is placed; The horizontal spring is used to generate an axial inward contraction force to resist the upward displacement and deformation of the structure when the structure is vibrated upward by external excitation, and to generate an axial outward force to resist the downward displacement and deformation of the structure when the structure is vibrated downward by external excitation, thereby realizing the adjustment of the damping force.

3. The vibration isolation protection device for a hydrogen storage cylinder mounted on a new energy vehicle according to claim 2 is characterized in that: The stiffness k of the horizontal spring is less than 0, and the force generated is opposite to the direction of the structural vibration displacement, which plays a role in resisting deformation. The annular vibration isolator and the variable damping-spring negative stiffness vibration isolator play the role of vertical support vibration isolation and low-frequency vibration isolation protection under excitation, and synergistically achieve a wide-band vibration isolation effect with a bandwidth of 0.1-100Hz.

4. The vibration isolation protection device for a hydrogen storage cylinder for a new energy vehicle according to claim 3 is characterized in that: The spatial vibration isolation structure is provided with a positioning groove for realizing circumferential fixation of the clamp; multiple groups of metal rubber-silicone rubber vibration isolation elements are arranged 360° symmetrically in the positioning groove, and the 360-degree circumferential vibration isolation stiffness is adjusted by adjusting the clamp preload; the variable damping-spring negative stiffness vibration isolator is used to realize the isolation of the longitudinal main vibration.

5. The vibration isolation protection device for a hydrogen storage cylinder mounted on a new energy vehicle according to claim 4 is characterized in that: The metal rubber-silicon rubber vibration isolation element is made by infiltrating a silicon rubber raw material solution into the internal gap of the metal rubber by vacuum infiltration; The outer surface of the metal rubber-silicone rubber element is silicone rubber.

6. The method for manufacturing a fiber optic tweezers probe for multi-particle capture according to claim 3, characterized in that: The composite damping plate position limiting protection structure includes two sets of metal rubber-silicone rubber composite damping plates, which are arranged at the left and right ends of the protection device to provide support, position limiting and vibration isolation for the gas cylinder during axial movement; The silicone rubber material of the outer layer of the metal rubber-silicone rubber composite damping plate can isolate the bottle body from direct contact with the metal wire of the metal rubber, thereby avoiding surface scratches when the gas cylinder moves axially.

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