Salt spray corrosion resistant shock absorber

Abstract

The application provides a salt mist corrosion resistant damper, which comprises a particle damper and a pad damper; the particle damper comprises a particle damper shell; an upper cover is arranged on the upper end of the particle damper shell; damping particles are arranged in the particle damper shell; the particle damper shell is fixed with a gas turbine generator set and various types of driving device chassis; the particle damper shell is connected with one end of a positioning screw rod, the positioning screw rod passes through an upper metal mesh pad and is connected with the pad damper; the positioning screw rod is sequentially connected with a base after passing through an intermediate shell, an outer ring metal mesh pad and an inner ring metal mesh pad in the pad damper; a transverse mesh pad is arranged between the intermediate shell and the base. The application can not only well consume the vibration energy of the full frequency band of the gas turbine generator set and various types of driving device on the offshore platform or land, but also can work stably for a long time in the high and low temperature and high salt mist environment.

Description

Technical Field

[0001] This invention belongs to the field of vibration control technology, specifically relating to a salt spray corrosion resistant vibration damper. Background Technology

[0002] With societal development, gas turbine generator sets and various drive devices are widely used in gas transmission, power generation, and ship propulsion. As human society has progressed, the strategic importance of oil and gas resources has increased significantly. Advances in technology have greatly enriched methods for oil and gas data detection and acquisition, making deep-sea oil and gas resources crucial for addressing the supply-demand imbalance. In the future, deep-sea oil and gas resources will become a vital global resource. In recent years, the number and quality of offshore platforms have greatly improved. The vibration reduction problem of gas turbine generator sets and various drive devices on these platforms has become particularly prominent, significantly impacting equipment lifespan and the health of personnel. Therefore, vibration reduction devices suitable for the high-salt-spray environment of the ocean are of paramount importance.

[0003] In recent years, gas turbine generator sets have been widely used in high-salt-spray environments such as offshore platforms and ships. Gas turbine generator sets are used in the integrated power systems of offshore platforms to generate electricity, providing energy and power to equipment on the platform, and are the main energy source for the integrated power system. The vibration damping performance and corrosion resistance of gas turbine generator set vibration dampers directly affect the safety and reliability of the gas turbine generator set, and are one of the key technologies in the design of offshore platform gas turbine generator sets. Unlike the vibration damper requirements of land-based gas turbine units, the marine environment is frequently subjected to typhoons, and the vibration dampers not only need to be able to resist certain lateral forces, but also to resist overturning under load. Rubber-based vibration dampers, widely used in engineering, cannot adapt to the high-salt-spray environment of the ocean. Summary of the Invention

[0004] The purpose of this invention is to provide a salt spray corrosion resistant vibration damper that combines a particle damper with a pad-type vibration damper to control the vibration of gas turbine generators and various drive devices. This design first absorbs the vibration energy of the load through the damping particles in the particle damper, and then further dissipates the remaining energy through the pad-type vibration damper. It effectively reduces both vertical and lateral vibrations. This invention also has the function of preventing the load device from tipping over and has the ability to operate stably for a long time in high, low temperature, and high salt spray environments. This design can be applied to the vibration control of gas turbine generators and various drive devices from various manufacturers and of various models.

[0005] A salt spray corrosion resistant vibration damper includes a particle damper and a pad-type vibration damper. The particle damper includes a particle damper housing; a top cover is installed on the upper end of the particle damper housing; damping particles are disposed inside the particle damper housing; the particle damper housing is fixed to the base frame of a gas turbine generator set and various drive devices; one end of the particle damper housing is connected to a positioning screw, which passes through an upper metal mesh pad and connects to the pad-type vibration damper; the positioning screw passes sequentially through an intermediate housing, an outer metal mesh pad, and an inner metal mesh pad in the pad-type vibration damper before connecting to a base; a transverse mesh pad is disposed between the intermediate housing and the base.

[0006] Furthermore, the particle damper housing is provided with eight equally divided chambers, each chamber measuring 230×60×50mm. Depending on the vibration characteristics, the eight chambers can use damping particles 11 of the same specification or different specifications. The size range of the damping particles 11 is 0.5mm to 10mm, and the filling rate of the damping particles 11 can be selected from 80% to 95%.

[0007] Furthermore, both the particle damper and the pad-type shock absorber are made of corrosion-resistant steel. Their steel structure is typically made of S355J2G3 steel and is painted according to marine engineering application regulations. All other steel components are made of AISI 316L stainless steel and coated with OKS2000 paraffin wax. The mesh pad is made of 18 / 8 steel mesh. The contact surface between the top cover and the particle damper shell is coated with anti-corrosion high-temperature sealant. The shock absorber operates at a temperature of -55℃ to 300℃.

[0008] Furthermore, both the outer and inner metal mesh pads are hollow disc-shaped structures, with four outer metal mesh pads positioned outside the nine inner metal mesh pads, jointly providing vertical and lateral support and vibration damping.

[0009] The beneficial effects of this invention are as follows: The salt spray corrosion resistant vibration damper of this invention has the characteristics of simple structure, small space occupation, high reliability and easy maintenance. It adopts an 8-zone particle damper, which can absorb the vibration energy of gas turbine generator sets and various drive devices in various frequency bands. The positioning screw can not only connect the various parts of the vibration damper in series, but also prevent the device from tilting. The use of all-steel corrosion resistant material can ensure that the vibration damper works stably in high temperature and high salt spray environment. Therefore, this vibration damper has a good vibration reduction effect on gas turbine generator sets and various drive devices that work in high temperature, low temperature and high salt spray environment for a long time. Attached Figure Description

[0010] Figure 1 This is a schematic cross-sectional view of the salt spray corrosion resistant vibration damper of the present invention;

[0011] Figure 2 This is a cross-sectional view of the particle damper of the present invention;

[0012] Figure 3 This is a schematic diagram of the base of the present invention;

[0013] Figure 4 This is a schematic diagram of the intermediate shell of the present invention;

[0014] Figure 5 This is a schematic diagram of the upper metal mesh pad of the present invention;

[0015] Figure 6 This is a schematic diagram of the transverse mesh pad of the present invention;

[0016] Figure 7 This is a schematic diagram of the outer ring mesh of the present invention;

[0017] Figure 8 This is a schematic diagram of the inner ring mesh pad of the present invention. Detailed Implementation

[0018] The present invention will now be further described with reference to the accompanying drawings.

[0019] like Figures 1-2 As shown, a salt spray corrosion resistant vibration damper includes a particle damper and a pad-type vibration damper. The particle damper includes a particle damper housing 2; a top cover 1 is installed on the upper end of the particle damper housing 2; damping particles 11 are disposed inside the particle damper housing 2; the particle damper housing 2 is fixed to the base frame of the gas turbine generator set and various drive devices; one end of the particle damper housing 2 is connected to a positioning screw 7, the positioning screw 7 passes through the upper metal mesh pad 3 and is connected to the pad-type vibration damper, the upper metal mesh pad 3 is an elastic element and has the function of adjusting balance; the positioning screw 7 passes through the middle housing 4, the outer metal mesh pad 9 and the inner metal mesh pad 10 in sequence in the pad-type vibration damper and is then connected to the base 5.

[0020] The particle damper cover is a smooth square metal plate with rounded corners and mounting holes. The particle damper housing is arranged in an eight-chamber configuration with a smooth surface. Each chamber is hollow and measures 230×60×50mm (outer diameter×inner diameter×depth). The particle damper housing is fixed to the gas turbine generator set and various drive unit base frames via four sets of bolts. Depending on the vibration characteristics of the gas turbine generator set and various drive units, the eight chambers can use damping particles of the same or different specifications. The diameter of the damping particles ranges from 0.5mm to 10mm, and the damping particle filling rate can be selected from 80% to 95%. The material of the damping particles is aluminum, stainless steel, or cast iron, depending on the vibration reduction design of each chamber. The vibration energy of the gas turbine generator set and various drive units causes the damping particles to move violently, resulting in collisions and friction between particles, between particles and the inner wall of the damper housing, or between particles and the cover, thereby dissipating vibration energy.

[0021] Both the particle damper and the pad-type shock absorber are made of corrosion-resistant steel. The steel structure is usually made of S355J2G3 steel and painted in accordance with marine engineering application regulations. All other steel components are made of AISI 316L stainless steel and coated with OKS2000 paraffin wax. The mesh pad is made of 18 / 8 steel mesh. The contact surface between the top cover and the particle damper shell is coated with anti-corrosion high-temperature sealant. The operating temperature of this shock absorber is -55℃~300℃.

[0022] Both the outer ring metal mesh pads 9 and the inner ring metal mesh pads 10 are hollow disc-shaped structures. The four outer ring metal mesh pads 9 are positioned outside the nine inner ring metal mesh pads 10, jointly providing vertical and lateral support and vibration damping. A certain gap exists between the upper surface of the inner wall of the intermediate shell and the upper surface of the base, regardless of whether there is a load. To prevent the intermediate shell from contacting the sides of the base and allowing vibration energy to be directly transmitted from the middle to the base, a transverse metal mesh pad 6 is provided between the intermediate shell and the base, providing lateral support for both. The four corners of the base are rounded, and each corner has a mounting hole. The base plate 5 has a hollow, protruding section in the middle. The particle damper housing 2 and the pad-type vibration damper are connected in series by positioning screws and nuts. An internal metal mesh pad passes through the center of the protruding position on the base, and the screws are fixed with nuts 8. The base 5 is fixed to the bottom mounting base by four sets of bolts. When there is no load, the positioning screws 7 and nuts 8 have a certain preload to prevent the vibration damper parts from falling off. Under load, the positioning screws are in a relaxed state, and the gap between the screw nut 8 and the base is not less than 3mm. Offshore platforms are frequently subjected to typhoons. When a typhoon or other situation causes one side of the load device to overturn, the positioning screws 7 and nuts 8 provide tension, which can effectively prevent the load device from tilting.

[0023] The elastic elements contained in the vibration damper include: upper metal mesh pad 3, transverse metal mesh pad 6, outer metal mesh pad 9, and inner metal mesh pad 10, all of which are hollow disc structures. The upper metal mesh pad 3 is responsible for further absorbing the vibration energy after the particle damper has damped the vibration, and the remaining vibration energy is transferred to the pad-type vibration damper. The outer metal mesh pad 9 and the inner metal mesh pad 10 are responsible for absorbing the remaining vertical and transverse vibration energy. The transverse metal mesh pad 6 is responsible for isolating the intermediate shell 4 and the base 5, preventing the vibration energy from being directly transferred to the vibration damper base through the transverse metal mesh pad 6, and then to the bottom mounting base 5.

[0024] The material and dimensions of the damping particles 11 inside the particle damper chamber can be changed according to test results and design requirements. The vibration energy of the gas turbine generator set and various drive devices is transmitted to the damping particles through the damper shell. The damping particles inside the particle damper undergo violent movement, consuming the device's vibration energy through collision and friction. Theoretically, the greater the vibration, the better the vibration reduction effect of the particle damper. The remaining vibration energy is further consumed through the upper metal mesh pad and finally transmitted to the pad-type vibration damper. The elastic element of the pad-type vibration damper then consumes the transmitted vibration energy. This design can effectively dissipate the vibration energy of gas turbine generator sets and various drive devices in high, low temperature, and high salt spray environments. This invention can not only effectively dissipate the vibration energy of offshore or onshore gas turbine generator sets and various drive devices across the entire frequency range, but also ensure long-term stable operation in high, low temperature, and high salt spray environments.

[0025] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A salt spray corrosion resistant vibration damper, characterized in that, It includes a particle damper and a pad-type vibration damper; the particle damper includes a particle damper housing (2); a top cover (1) is installed on the upper end of the particle damper housing (2); damping particles (11) are provided inside the particle damper housing (2); the particle damper housing (2) is fixed to the base frame of the gas turbine generator set and various drive devices; one end of the particle damper housing (2) is connected to a positioning screw (7), and the positioning screw (7) passes through the upper metal mesh pad (3) and is connected to the pad-type vibration damper; the positioning screw (7) passes through the middle housing (4), the outer metal mesh pad (9) and the inner metal mesh pad (10) in the pad-type vibration damper in sequence and is then connected to the base (5); a transverse mesh pad (6) is provided between the middle housing (4) and the base (5); the upper surface of the inner wall of the middle housing and the upper surface of the base have a certain gap in both loaded and unloaded states, in order to prevent the middle housing from contacting the side of the base and causing vibration energy The load can be directly transferred from the middle to the base. A transverse metal mesh pad (6) is provided between the middle shell and the base to provide transverse support for the middle shell and the base (5). The base (5) has an internal protrusion in the middle of the bottom plate. The protrusion is hollow. The particle damper shell (2) and the pad-type shock absorber are connected in series by positioning screws and nuts. The internal metal mesh pad is inserted into the center of the protrusion position of the base. The screw is fixed with nuts (8). The base (5) is fixed to the bottom mounting seat by four sets of bolt connection components. When there is no load, the positioning screw (7) and the nut (8) have a certain preload to prevent the shock absorber parts from falling off. When under load, the positioning screw is in a relaxed state. The gap between the screw nut (8) and the base is not less than 3mm. The offshore platform is often hit by typhoons. When a typhoon or other situation causes the load device to overturn on one side, the positioning screw (7) and the nut (8) provide tension, which can effectively prevent the load device from tilting. Both the particle damper and the pad-type shock absorber are made of corrosion-resistant steel. The steel structure is made of S355J2G3 steel and is painted in accordance with marine engineering application regulations. All other steel components are made of AISI 316L stainless steel and coated with OKS2000 paraffin wax. The mesh pad is made of 18 / 8 steel mesh. The contact surface between the top cover and the particle damper shell is coated with anti-corrosion high-temperature sealant. The shock absorber has an operating temperature of -55℃ to 300℃.

2. The salt spray corrosion resistant vibration damper according to claim 1, characterized in that, The particle damper housing (2) is provided with eight equally divided chambers, each chamber having a size of 230×60×50mm. The eight chambers can use damping particles (11) of the same specification or different specifications of damping particles (11) according to the vibration characteristics. The size range of the damping particles (11) is 0.5mm to 10mm, and the filling rate of the damping particles (11) is selected from 80% to 95%.

3. The salt spray corrosion resistant vibration damper according to claim 1, characterized in that, Both the outer ring metal mesh pad (9) and the inner ring metal mesh pad (10) are hollow disc-shaped structures. The four outer ring metal mesh pads (9) are set outside the nine inner ring metal mesh pads (10) to jointly bear the vertical and horizontal support and vibration reduction functions.

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