Micro-elastic limiting damper for air floating platform and mounting and using method of micro-elastic limiting damper

Abstract

The invention discloses a micro-elastic limiting damper for an air floating platform and a mounting and using method of the micro-elastic limiting damper, and is characterized in that the micro-elastic limiting damper comprises a contact plate, a shell, a micro-elastic damping body and a mounting seat, and the micro-elastic limiting damper has a damping effect on the air floating platform. The mounting and using method comprises the steps that after the air floating platform is built and inflated to float, the position of the contact plate is determined according to the overall mass center position of the platform body and the load after actual bearing and the test result of professional micro-vibration test equipment, and the mounting base is temporarily fixed; and adjusting the position of the mounting adjusting hole, testing by using professional micro-vibration testing equipment, and fastening the expansion bolt in the mounting adjusting hole after reaching the optimal pressure intensity position of the mounting adjusting hole. The micro-elastic limiting damper is integrally installed in a modularized mode and has the advantages of being high in installation speed, capable of guaranteeing micro-elasticity, capable of achieving a certain damping effect, safe, reliable and the like.

Description

Technical Field

[0001] The invention relates to the field of micro-elastic limit dampers for air floating platforms, and in particular to a micro-elastic limit damper for air floating platforms and an installation and use method thereof. Background Art

[0002] The air floating platform mainly provides a vibration isolation environment for vibration-sensitive work such as optical component detection, precision instrument measurement and optoelectronic field measurement. However, due to the influence of load mass, load center of mass height, low air spring stiffness and the structural characteristics of the platform, when the overall center of mass position of the "platform + load" after the air floating platform is inflated and floated is larger below the air spring support surface of the platform or the overall center of mass position is larger on the platform, the platform is prone to shaking, which is called the "pendulum effect", which will cause the air floating platform to be unstable and the vibration isolation performance of the air floating platform to be reduced, or even unusable.

[0003] Adding dampers to the air-floating platform is an effective way to solve the "pendulum effect". However, blindly using dampers in various parts of the air-floating platform can easily lead to excessive overall stiffness of the air-floating platform, which has a negative effect on the vibration isolation performance of the air-floating platform. The performance of the damper is also critical. Traditional spring-type dampers and rubber-type dampers have linear or nearly linear changes during damping. For the air-floating platform, the elasticity is too large, and the rebound is too fast or too slow, which will also affect the stability of the air-floating platform. The oil-type damper can only play a damping role and has no limit effect on the air-floating platform. Therefore, the installation position and performance of the damper are the key to solving the problem. Summary of the invention

[0004] Due to the above deficiencies in the current technology, the present invention provides a micro-elastic limit damper for an air floating platform and a method for installing and using the same.

[0005] A microelastic limit damper for an air floating platform, comprising a contact plate, a shell, a microelastic damper and a mounting seat; the bottom of the shell is connected to the mounting seat, and stacked microelastic dampers are arranged inside the shell; the microelastic dampers are stacked together by sticking with a special adhesive; the bottom surface of the microelastic damper is integrated with the mounting seat;

[0006] The micro-elastic limit damper is located on the air floating platform; the air floating platform includes a T-shaped platform and a ground; piers are evenly installed around the ground; an air spring is arranged between the pier and the top surface of the T-shaped platform; the contact plate in the micro-elastic limit damper is fixed to the side of the T-shaped platform, and the mounting seat is fixed to the side of the pier.

[0007] Furthermore, the mounting seat includes two rectangular steel plates which are perpendicular to each other, and a triangular reinforcing rib plate is welded between the steel plates on both sides.

[0008] Furthermore, a steel plate on one side of the mounting seat is adhered to the micro-elastic damping body; and a steel plate perpendicular to the other side is provided with two symmetrical waist-shaped mounting adjustment holes.

[0009] Furthermore, an expansion bolt is installed in the waist-shaped installation adjustment hole in the installation seat to fix the installation seat to the side of the pier.

[0010] Furthermore, the shell is a cylindrical shell formed by processing a seamless steel pipe.

[0011] Furthermore, the housing is not in contact with the microelastic damper, and is used to protect the microelastic damper and prevent it from being damaged.

[0012] Furthermore, the micro-elastic damping body is made of high-density rubber-plastic plate material and is processed into special geometric dimensions.

[0013] Furthermore, the surface of the contact plate in contact with the micro-elastic damper is made of a low-friction material, and the surface in contact with the side surface of the T-type stage is made of an adhesive material.

[0014] Furthermore, the surface of the contact plate in contact with the micro-elastic damper comprises a low-friction aluminum-plastic composite plate.

[0015] A method for installing and using a micro-elastic limit damper for an air floating platform, the specific steps are as follows:

[0016] Step 1: After the air-floating platform is built and inflated, determine the position of the contact plate of the micro-elastic limit damper on the T-shaped platform according to the overall center of mass of the "platform + load" after actual load bearing and the test results of professional micro-vibration testing equipment, and then install the expansion bolts in the installation adjustment holes of the micro-elastic limit damper mounting seat to temporarily fix it on the side of the pier column;

[0017] Step 2: Install, adjust and fix the expansion bolts in the mounting adjustment holes of the mounting seat, adjust the mounting adjustment hole position of the mounting seat to apply pressure to the T-type platform body 1, and test with a professional micro-vibration test equipment. When the test result of the professional micro-vibration test equipment is the best, the mounting adjustment hole position of the mounting seat is the best position for the pressure strength of the micro-elastic limit damper;

[0018] Step 3: After reaching the optimal position of the pressure strength of the installation adjustment hole, tighten the expansion bolts in the installation adjustment hole of the mounting base thoroughly.

[0019] The beneficial effects of the present invention are:

[0020] The micro-elastic limit damper is installed as a modular whole, with the advantages of fast installation speed, ensuring micro-elasticity while having a certain damping effect, safety and reliability, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the micro-elastic limit damper of the present invention installed on an air floating platform;

[0022] Figure 2 It is a partial enlarged schematic diagram of the micro elastic limit damper of the present invention being installed and used on an air floating platform;

[0023] Figure 3 It is a schematic diagram of the installation adjustment hole of the micro-elastic limit damper of the present invention;

[0024] Figure 4 It is a schematic cross-sectional structure diagram of the micro-elastic limit damper of the present invention;

[0025] Figure 5 It is a schematic side view of the overall structure of the micro-elastic limiting damper of the present invention.

[0026] Explanation of reference numerals: 1 - T-shaped platform, 2 - air spring, 3 - pier, 4 - ground, 5 - contact plate, 6 - housing, 7 - micro-elastic damping body, 8 - mounting seat. DETAILED DESCRIPTION

[0027] In order to further understand the present invention, the present invention is described in detail below with reference to the accompanying drawings and examples.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] like Figure 1-5The microelastic limit damper shown comprises a contact plate 5, a shell 6, a microelastic damper 7, and a mounting seat 8. The contact plate 5 is a low-friction aluminum-plastic composite plate, and other materials can also be selected as needed, and is pasted to the side of the T-type platform body by high-strength structural adhesive; the shell 6 is a cylindrical shell formed by seamless steel pipe processing; the shell 6 does not contact the microelastic damper 7, and is used to protect the microelastic damper 7 from damage. The microelastic damper 7 is a core component, which is made of high-density rubber-plastic plate material with special geometric dimensions. The number of high-density rubber-plastic plates to be stacked is determined according to the test results when the microelastic limit damper is not installed. The high-density rubber-plastic plates are pasted together by special adhesives and pasted together with the mounting seat 8; the mounting seat 8 is welded by Q235 steel plates. In order to ensure its strength, a reinforcing rib plate is welded between the two plates, and the welded mounting seat 8 is welded to the shell 6 as a whole. The assembly sequence of the micro-elastic limit damper is as follows: first, the high-density rubber-plastic plates are glued together with a special adhesive to form a micro-elastic damper; after the surface treatment of the assembly body in which the mounting seat 8 and the housing 6 are welded as one is completed, it is glued together with the micro-elastic damper 7 with a special adhesive. When the assembled micro-elastic limit damper is used, the head of the micro-elastic damper 7 is pressed through the fastening position of the installed adjustment hole to squeeze the contact plate 5 glued to the T-type platform body 1 as a whole, and the micro-elastic damper composed of high-density rubber-plastic plates is squeezed and rubbed to play the role of damping and limiting.

[0030] The installation and usage instructions are as follows

[0031] After the air-floating platform is built and inflated and floated, the position of the micro-elastic limit damper contact plate 5 on the T-type platform 1 is determined according to the overall center of mass position of the "platform + load" after actual bearing and the test results of the professional micro-vibration testing equipment, and then the expansion bolts in the installation adjustment holes of the micro-elastic limit damper mounting seat 8 are installed to temporarily fix it on the side of the pier 3; the expansion bolts in the installation adjustment holes of the mounting seat 8 are installed, adjusted and fixed, and the installation adjustment hole position of the mounting seat 8 for applying pressure to the T-type platform 1 is adjusted, and the professional micro-vibration testing equipment is used for testing. After the test results of the professional micro-vibration testing equipment are optimal, the installation adjustment hole position of the mounting seat 8 is the optimal position for the pressure strength of the micro-elastic limit damper; after reaching the optimal position for the pressure strength of the installation adjustment hole, the expansion bolts in the installation adjustment hole of the mounting seat 8 are thoroughly tightened.

[0032] Example 1

[0033] After the air-floating platform shown in the figure is constructed and inflated and floated, the overall center of mass position of the "platform + load" is determined. After calculation, it is found that the overall center of mass position is below the air spring support surface of the T-type platform 1. When it is larger, it is tested and evaluated by professional micro-vibration testing equipment, and the number and installation position of the micro-elastic limit damper are determined according to the results. The measured results show that the larger the vibration value and the larger the overall center of mass position is below the air spring support surface of the T-type platform 1, the more micro-elastic limit dampers need to be used in pairs symmetrically, and the fewer the number of high-density rubber-plastic plates in the micro-elastic damping body 7 of a single micro-elastic limit damper (at least 2), the higher the position where it should be installed on the column pier 3. Determine the position of the micro-elastic limit damper contact plate 5 on the T-type platform body 1, and after the structural adhesive is cured, install and fix the expansion bolts of the micro-elastic limit damper mounting seat 8, install, adjust and fix through the expansion bolts in the mounting adjustment holes of the mounting seat 8, adjust the mounting adjustment hole positions of the mounting seat 8 for applying pressure to the T-type platform body 1 and temporarily fix the micro-elastic limit damper, and use professional micro-vibration testing equipment to test and record the results and the installation adjustment hole positions of the mounting seat 8 again; adjust the installation adjustment hole positions of the mounting seat 8 multiple times, and test with professional micro-vibration testing equipment, record the test results and the installation adjustment hole positions of the mounting seat 8; compare the results measured by all micro-vibration testing equipment, and select a group of the best ones, the installation adjustment hole positions of the mounting seat 8 at this time are the best positions, that is, the pressure strength of the micro-elastic limit damper is the best, and complete the expansion bolts and screws of the mounting seat 8 for thorough tightening.

[0034] Example 2

[0035] The air-floating platform shown in the figure is constructed and inflated and floated. The overall center of mass position of the "platform + load" is determined. After calculation, it is found that the overall center of mass position is on the platform with a larger surface. Then, it is tested and evaluated by professional micro-vibration test equipment, and the number and installation position of the micro-elastic limit damper are determined according to the results. The measured results show that the larger the vibration value and the larger the surface of the platform, the more dampers are needed to be used in pairs symmetrically. The fewer the number of high-density rubber-plastic plates in the micro-elastic damping body of a single damper (at least 2), the lower the position it should be installed on the column pier 3. After determining the position installed on the column pier 3, the contact plate 5 is pasted on the micro-elastic limit damper head corresponding to the platform position by high-strength structural adhesive. After the structural adhesive is cured, the expansion bolts of the micro-elastic limit damper mounting seat 8 are installed and fixed, and the mounting seat 8 is installed, adjusted and fixed by the expansion bolts. Adjust the position of the installation adjustment hole of the mounting seat 8, apply pressure to adjust the table body and temporarily fix the micro-elastic limit damper, test it again with professional micro-vibration testing equipment, record the test results and the position of the installation adjustment hole of the mounting seat 8; adjust the position of the installation adjustment hole of the mounting seat 8 multiple times to apply pressure to adjust the table body, and use professional micro-vibration testing equipment to record the test results and the position of the installation adjustment hole of the mounting seat 8; compare the results measured by all micro-vibration testing equipment, and select the best set of them. At this time, the position of the installation adjustment hole of the mounting seat 8 is the best position, that is, the pressure strength of the micro-elastic limit damper is the best, and the expansion bolts and screws of the mounting seat 8 are completely tightened.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A micro-elastic limit damper for an air floating platform, characterized in that: The microelastic limit damper comprises a contact plate (5), a housing (6), a microelastic damping body (7) and a mounting seat (8); the bottom of the housing (6) is connected to the mounting seat (8), and the housing (6) is provided with stacked microelastic damping bodies (7); the microelastic damping bodies (7) are stacked together by bonding with a special adhesive; the bottom surface of the microelastic damping body (7) and the mounting seat (8) are integrated into one body; The micro-elastic limit damper is located on an air-floating platform; the air-floating platform comprises a T-shaped platform (1) and a ground (4); columns (3) are evenly installed around the ground (4); an air spring (2) is provided between the column (3) and the top surface of the T-shaped platform (1); a contact plate (5) in the micro-elastic limit damper is fixed to the side of the T-shaped platform (1), and a mounting seat (8) is fixed to the side of the column (3).

2. The microelastic limit damper for an air floating platform according to claim 1, characterized in that: The mounting seat (8) comprises two rectangular steel plates which are perpendicular to each other, and a triangular reinforcing rib plate is welded between the steel plates on both sides.

3. The micro elastic limit damper for an air floating platform according to claim 2, characterized in that: The steel plate on one side of the mounting seat (8) is adhered to the micro-elastic damping body (7); and the steel plate on the other side perpendicular to the steel plate is provided with two symmetrical waist-shaped mounting adjustment holes.

4. The micro elastic limit damper for an air floating platform according to claim 3, characterized in that: An expansion bolt is installed in the waist-shaped installation adjustment hole in the installation seat (8) to fix the installation seat (8) to the side of the column pier (3).

5. The micro elastic limit damper for an air floating platform according to claim 1, characterized in that: The outer shell (6) is a cylindrical outer shell formed by processing a seamless steel pipe.

6. The micro elastic limit damper for an air floating platform according to claim 5, characterized in that: The housing (6) is not in contact with the micro-elastic damping body (7) and is used to protect the micro-elastic damping body (7) and prevent it from being damaged.

7. The micro elastic limit damper for an air floating platform according to claim 1, characterized in that: The micro-elastic damping body (7) is made of a high-density rubber-plastic plate material and is processed into special geometric dimensions.

8. The micro elastic limit damper for an air floating platform according to claim 1, characterized in that: The surface of the contact plate (5) in contact with the micro-elastic damper (7) is made of a low-friction material, and the surface in contact with the side surface of the T-shaped platform (1) is made of an adhesive material.

9. The micro elastic limit damper for an air floating platform according to claim 8, characterized in that: The surface of the contact plate (5) in contact with the micro-elastic damping body (7) comprises a low-friction aluminum-plastic composite plate.

10. The method for installing and using a micro-elastic limit damper for an air floating platform according to any one of claims 1 to 9, characterized in that: The specific steps are as follows: Step 1: After the air-floating platform is constructed and inflated and floated, the position of the micro-elastic limit damper contact plate (5) on the T-shaped platform (1) is determined according to the overall center of mass position of the "platform + load" after actual load bearing and the test results of professional micro-vibration testing equipment, and then the expansion bolts in the micro-elastic limit damper mounting seat (8) are installed in the mounting adjustment hole to temporarily fix it on the side of the pier column (3); Step 2: Install, adjust and fix the expansion bolts in the installation adjustment holes of the mounting seat (8), adjust the installation adjustment hole position of the mounting seat (8) for applying pressure to the T-shaped platform (1), and test with a professional micro-vibration test device. When the test result of the professional micro-vibration test device is optimal, the installation adjustment hole position of the mounting seat (8) is the optimal position for the pressure strength of the micro-elastic limit damper; Step 3: After reaching the optimum position of the pressure strength of the installation adjustment hole, install the expansion bolts in the installation adjustment hole of the mounting base (8) and tighten them thoroughly.

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