An adjustable marine damping device

Abstract

The utility model discloses an adjustable marine damping device, including the seat board of fixed in the surface of ship deck, the seat board on be provided with elastic damping mechanism, the detachable connection of elastic damping mechanism has adjustable counterweight, adjustable counterweight's both sides are provided with adjusting bolt. Help the ship in different work rotational speed, reduce the vibration that the ship mechanical equipment work when transmission gives the ship structure in different work scene, realize better damping effect. Specifically, it is a kind of damping device that is combined with the actual vibration condition of engineering ship, has small mass and size, simple structure, low in price, and has the advantages such as convenient installation and replacement.

Description

Technical Field

[0001] This utility model relates to a vibration damping device, specifically an adjustable marine vibration damping device, belonging to the field of marine facility technology. Background Technology

[0002] Ship vibrations mainly originate from power plants (such as main engines and gearboxes), propeller hydrodynamic excitation, and wave loads. These vibrations can lead to structural fatigue, decreased equipment precision, and discomfort for crew members during work and rest.

[0003] Vibration reduction technology is mainly divided into passive vibration reduction and active vibration reduction. Passive vibration reduction mainly relies on damping materials (such as rubber and silicone oil) or mechanical structures (springs and mass blocks) to dissipate vibration energy. It is effective for fixed-frequency vibrations (such as the engine's fundamental frequency) and requires no external power source. Active vibration reduction mainly uses sensors to monitor vibration in real time, and actuators (piezoelectric ceramics and electromagnetic coils) generate a counterforce to counteract the vibration. However, it requires continuous power supply, is complex, and has a high cost. Existing passive vibration reduction equipment has the following drawbacks: due to the complex types of vibrations on ships, existing equipment cannot be adjusted for different vibration types because the counterweight cannot be adjusted, resulting in a limited range of applications. Therefore, further improvements are needed. Utility Model Content

[0004] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and propose an adjustable marine vibration damping device with adjustable counterweight mass, flexible and convenient use, strong adaptability, and simple and reasonable structure.

[0005] The technical solution adopted by this utility model is: an adjustable marine vibration damping device, characterized in that: it includes a seat plate fixed to the surface of the ship's deck; an elastic damping mechanism is provided on the seat plate; an adjustable counterweight is detachably connected to the elastic damping mechanism; and adjusting bolts are provided on both sides of the adjustable counterweight.

[0006] Furthermore, the seat plate is a steel seat plate; the seat plate is fixed to the surface of the ship's deck by welding; the elastic damping mechanism includes a wire rope elastic vibration isolator.

[0007] Furthermore, the elastic damping mechanism also includes an upper longitudinal beam and a lower longitudinal beam disposed on the upper and lower sides of the wire rope elastic vibration isolator; a first screw hole is provided on the surface of the seat plate; a first through hole that mates with the first screw hole is provided in the lower longitudinal beam; and the lower longitudinal beam is fixed to the surface of the seat plate by bolts.

[0008] Furthermore, the adjustable counterweight has side wing plates on both sides; the side wing plates have second through holes; the upper longitudinal beam has a second screw hole opposite to the second through hole; the upper longitudinal beam and the side wing plates are connected by bolts.

[0009] Furthermore, the adjustable counterweight includes a base and an inner part; the side wing plates are arranged on the left and right sides of the bottom of the base; and upright plates are arranged on the front and rear sides of the base.

[0010] Furthermore, the inner core is placed in the space formed by the surface of the base and the two upright plates; a third through hole is provided on the upright plates; and a third screw hole is provided on the inner core opposite to the third through hole.

[0011] Furthermore, the adjusting bolt passes through the third through hole and is spirally connected to the third screw hole on the inner core.

[0012] This invention offers the following advantages: it helps ships reduce vibrations transmitted to the hull structure from their mechanical equipment during operation at different speeds and in different working conditions, achieving a better vibration reduction effect. Specifically, it is a vibration reduction device tailored to the actual vibration conditions of engineering vessels, featuring small size and weight, simple structure, low cost, and easy installation and replacement. It mainly consists of an adjustable counterweight, an elastic vibration isolator composed of several steel wire ropes, and a steel base plate. This vibration reduction device can adjust the vibration reduction frequency by changing the mass of the adjustable counterweight, the number of steel wire ropes in the vibration isolator, and the overall layout of the device (including the number and installation area) to meet the vibration reduction frequency requirements of the target ship in different operating speed ranges and under different working conditions. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is a front structural diagram of the present invention.

[0015] Figure 3 This is a schematic diagram of the adjustable counterweight.

[0016] Wherein: 1 is the seat plate, 2 is the adjustable counterweight, 2-1 is the seat body, 2-2 is the inner core, 2-21 is the upright plate, 4 is the steel wire rope elastic vibration isolator, 5 is the upper longitudinal beam, 6 is the lower longitudinal beam, 7 is the side wing plate, and 8 is the adjusting bolt. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0018] See Figures 1-3This application discloses an adjustable marine vibration damping device, including a seat plate 1 fixed to the surface of a ship's deck; an elastic damping mechanism is provided on the seat plate 1; an adjustable counterweight 2 is detachably connected to the elastic damping mechanism; and adjusting bolts 8 are provided on both sides of the adjustable counterweight 2.

[0019] Furthermore, the seat plate 1 is a steel seat plate; the seat plate 1 is fixed to the surface of the ship deck by welding; the elastic damping mechanism includes a wire rope elastic vibration isolator 4.

[0020] Furthermore, the elastic damping mechanism also includes an upper longitudinal beam 5 and a lower longitudinal beam 6 disposed on the upper and lower sides of the wire rope elastic vibration isolator 4; a first screw hole is provided on the surface of the seat plate 1; a first through hole that mates with the first screw hole is provided in the lower longitudinal beam 6; and the lower longitudinal beam is fixed to the surface of the seat plate 1 by bolts.

[0021] Furthermore, the adjustable counterweight 2 has side wing plates 7 on both sides; the side wing plates 7 have second through holes; the upper longitudinal beam 5 has a second screw hole opposite to the second through hole; the upper longitudinal beam and the side wing plates 7 are connected by bolts.

[0022] Furthermore, the adjustable counterweight 2 includes a base 2-1 and an inner core 2-2; the side wing plates 7 are arranged on the left and right sides of the bottom of the base 2-1; and the front and rear sides of the base 2-1 are provided with upright plates 2-21.

[0023] Furthermore, the inner core 2-2 is placed in the space formed by the surface of the base 2-1 and the two upright plates 2-21; a third through hole is provided on the upright plate 2-21; and a third screw hole is provided on the inner core opposite to the third through hole.

[0024] Furthermore, the adjusting bolt 8 passes through the third through hole and is spirally connected to the third screw hole on the inner core 2-2.

[0025] Working principle: The wire rope elastic vibration isolator 4 is connected to the seat plate 1 and the side wing plates 7 on both sides of the adjustable counterweight 2 via its own upper longitudinal beam 5 and lower longitudinal beam 6, respectively, and is connected by bolts. This method allows for easy replacement of the wire rope elastic vibration isolator 4, enabling the selection of wire rope elastic vibration isolators 4 with different elastic coefficients to adapt to different application scenarios. Meanwhile, the adjustable counterweight 2 consists of a seat body 2-1 and an inner core 2-2. The inner core 2-2 is fixed inside the seat body 2-1 by bolts, allowing for quick disassembly. This means that inner cores 2-2 of different weights can be replaced to form adjustable counterweights 2 with different total masses, used to address and adapt to various vibration types experienced by the hull under different working conditions and operating speeds, achieving better vibration reduction.

[0026] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. An adjustable marine vibration damping device, characterized in that: It includes a seat plate (1) fixed to the surface of the ship's deck; the seat plate (1) is provided with an elastic damping mechanism; the elastic damping mechanism is detachably connected to an adjustable counterweight (2); the adjustable counterweight (2) is provided with adjusting bolts (8) on both sides. The seat plate (1) is a steel seat plate; the seat plate (1) is fixed to the surface of the ship deck by welding; the elastic damping mechanism includes a steel wire rope elastic vibration isolator (4). The elastic damping mechanism further includes an upper longitudinal beam (5) and a lower longitudinal beam (6) disposed on the upper and lower sides of the wire rope elastic vibration isolator (4); a first screw hole is provided on the surface of the seat plate (1); a first through hole that mates with the first screw hole is provided in the lower longitudinal beam (6); the lower longitudinal beam is fixed to the surface of the seat plate (1) by bolts. The adjustable counterweight (2) has side wing plates (7) on both sides; the side wing plates (7) have a second through hole; the upper longitudinal beam (5) has a second screw hole opposite to the second through hole; the upper longitudinal beam and the side wing plates (7) are connected by bolts; The adjustable counterweight (2) includes a base (2-1) and an inner core (2-2); the side wing plates (7) are arranged on the left and right sides of the bottom of the base (2-1); and the front and rear sides of the base (2-1) are provided with upright plates (2-21).

2. The adjustable marine vibration damping device according to claim 1, characterized in that: The inner core (2-2) is placed in the space formed by the surface of the base (2-1) and the two upright plates (2-21); a third through hole is provided on the upright plate (2-21); a third screw hole is provided on the inner core opposite to the third through hole.

3. The adjustable marine vibration damping device according to claim 2, characterized in that: The adjusting bolt (8) passes through the third through hole and is screwed into the third screw hole on the inner core (2-2).

Images