Anti-impact vibration isolation buoyant raft device for ship

Abstract

The utility model relates to the technical field of anti-impact vibration isolation buoyant rafts, in particular to an anti-impact vibration isolation buoyant raft device for ships and warships, which comprises a first middle raft frame and a second middle raft frame, a raft body supporting component is mounted at the lower end of the first middle raft frame, and a deck supporting component is mounted at the lower end of the second middle raft frame. According to the anti-shock and vibration-isolation floating raft device, operation equipment in the same engine room or pump room of a ship is combined according to function types, and the combined operation equipment is installed on the anti-shock and vibration-isolation floating raft device platform. According to the combined anti-impact vibration isolation buoyant raft device, the vibration reduction performance of the buoyant raft device can be greatly improved, the acceleration fall effect is obviously improved compared with a single-layer vibration isolation device and a double-layer vibration isolation device, and the vibration level fall requirement after equipment is subjected to vibration reduction through a ship engine room and a pump room is met.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-impact and vibration-isolating floating rafts, in particular to an anti-impact and vibration-isolating floating raft device for ships. Background Art

[0002] In order to reduce the impact of shock and vibration on the equipment and the hull, the vibration reduction installation methods used by the existing ship-borne operating equipment are generally: installing shock pads and vibration isolators; installing single-layer vibration isolation devices and double-layer vibration isolation devices. This is an anti-shock vibration reduction method used by single operating equipment to reduce shock and vibration.

[0003] The existing anti-impact and vibration reduction method for ship-borne operating equipment is an anti-impact and vibration reduction method used for single operating equipment. There are various types and specifications of operating equipment installed in the same cabin in the engine room or pump room. Each specification of operating equipment is installed with a single anti-impact and vibration reduction installation, which increases the workload of the cabin construction and prolongs the production and manufacturing cycle. After the single operating equipment is equipped with conventional anti-impact and vibration reduction installation measures, the acceleration drop value after vibration reduction is relatively small, and the vibration reduction effect is not ideal. It is difficult to meet the vibration level drop requirements of the ship's engine room and pump room after vibration reduction of the equipment, so improvements are needed. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes an anti-impact and vibration-isolating floating raft device for ships.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A ship anti-impact vibration isolation floating raft device comprises a first intermediate raft frame and a second intermediate raft frame, wherein a raft body support assembly is installed at the lower end of the first intermediate raft frame, and a deck support assembly is installed at the lower end of the second intermediate raft frame;

[0007] A fire pump, three first cooling pumps and two second cooling pumps are installed at the upper end of the first intermediate raft, and EAB type upper vibration isolators are fixed to the four corners of the lower ends of the first cooling pump and the second cooling pump, and the EAB type upper vibration isolators are installed at the upper end of the first intermediate raft;

[0008] Diesel generator sets are installed on both sides of the upper end of the second intermediate raft frame, and an upper vibration isolator is installed between the two diesel generator sets.

[0009] Compared with the prior art, the present application can well arrange the raft support assembly and the deck support assembly according to the needs, and can install and fix them according to the needs, thereby improving the overall firmness.

[0010] Preferably, the raft support assembly includes a plurality of SJD type lower layer vibration isolators installed at equal intervals at the lower end of the first intermediate raft frame, a plurality of first limiters are installed at equal intervals at the lower end of the first intermediate raft frame, and the lower ends of the plurality of SJD type lower layer vibration isolators and the plurality of first limiters are commonly connected to a hull mounting clamp.

[0011] Furthermore, it can effectively protect against excessive impact and raft collision.

[0012] Preferably, the deck support assembly includes a plurality of lower layer vibration isolators installed at equal intervals at the lower end of the second intermediate raft frame, a plurality of second limiters are installed at equal intervals on both sides of the lower end of the second intermediate raft frame, and the lower ends of the plurality of lower layer vibration isolators and the plurality of second limiters are commonly fixed with an installation deck.

[0013] Furthermore, the mounting parts on the armor can be effectively protected.

[0014] Preferably, the three first cooling pumps are composed of two generator set cooling water pumps and a refrigeration cooling water pump, and the two second cooling pumps are two air-conditioning cooling water pumps.

[0015] Further, improve the overall stability.

[0016] Preferably, an instrument bracket is installed at the upper end of the first intermediate raft.

[0017] Furthermore, it is convenient to install the instrument.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] 1. Combine the operating equipment (vibration source) in the same cabin according to the functional type, and install the combined multiple operating equipment on a shock-resistant vibration isolation raft device platform. This improves the efficiency of cabin installation;

[0020] 2. The combined anti-impact vibration isolation raft device improves the vibration isolation performance of the equipment and meets the vibration level drop requirements of the ship's engine room and pump room after vibration reduction of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is the installation structure diagram of the utility model in the pump cabin;

[0022] Figure 2 This is the inner side view of the pump room of the utility model;

[0023] Figure 3 This is the installation structure diagram of the utility model in the cabin;

[0024] Figure 4 This is an inside view of the cabin of the utility model;

[0025] In the figure: 1SJD type lower vibration isolator, 2 first limiter, 3 hull mounting clamp, 4 first intermediate raft frame, 5EAB type upper vibration isolator, 6 first cooling pump, 7 second cooling pump, 8 fire pump, 9 second limiter, 10 lower vibration isolator, 11 mounting deck, 12 second intermediate raft frame, 13 upper vibration isolator, 14 diesel generator set. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0027] Reference Figure 1-4 , an anti-impact and vibration-isolating floating raft device for a ship, comprising a first intermediate raft frame 4 and a second intermediate raft frame 12, wherein a raft support assembly is installed at the lower end of the first intermediate raft frame 4, and a deck support assembly is installed at the lower end of the second intermediate raft frame 12;

[0028] A fire pump 8, three first cooling pumps 6 and two second cooling pumps 7 are installed at the upper end of the first intermediate raft 4. EAB type upper vibration isolators 5 are fixed to the four corners of the lower ends of the first cooling pumps 6 and the second cooling pumps 7. The EAB type upper vibration isolators 5 are installed at the upper end of the first intermediate raft 4. An instrument bracket is installed at the upper end of the first intermediate raft 4.

[0029] Diesel generator sets 14 are installed on both sides of the upper end of the second intermediate raft frame 12 , and an upper vibration isolator 13 is installed between the two diesel generator sets 14 .

[0030] 1. According to the layout of the ship's pump room and engine room, the operating equipment types, functions and layout positions in the cabin are modularly combined; the modularly combined operating equipment is installed on the same anti-impact and vibration isolation raft device platform.

[0031] 2. Design the upper vibration isolator, raft frame and lower vibration isolator of the equipment according to the deadweight and vibration spectrum of the running equipment; use Ansys software to perform harmonic response analysis on the vibration acceleration isolation effect of the theoretically designed steel raft frame; use software to analyze the rationality of the designed raft frame, upper vibration isolator and lower vibration isolator.

[0032] Finite element method is used to establish mathematical and mechanical models of the operating equipment, raft body, upper vibration isolator and lower vibration isolator in the floating raft device using rigid body, elastic body and spring units respectively.

[0033] The mass matrix adopts a concentrated mass array. When analyzing the vibration and sway stability, the output of the lower vibration isolator is the fixed end. When analyzing the impact resistance, the impact pulse is input from the output end of the lower vibration isolator.

[0034] Vibration equation of motion

[0035] [M]{x″}+[C]{x′}+[K]{x}={0}

[0036] in,

[0037] [M]: Mass matrix of the raft system

[0038] [C]: Damping matrix of the raft system

[0039] [K]: Stiffness matrix of the raft system

[0040] {x}, {x′}, {x″}: are the column vectors of the vibration displacement, velocity and acceleration of each node relative to the base. In the calculation of the vibration eigenvalue problem, damping is ignored and the base is fixed;

[0041] A solid model of the raft is established, material properties are defined, the mesh is set, the analysis order is set to 50, and calculations are performed.

[0042] Reference Figure 1-2 The raft support assembly includes a plurality of SJD type lower layer vibration isolators 1 installed at equal intervals at the lower end of the first intermediate raft frame 4, a plurality of first limiters 2 are installed at equal intervals at the lower end of the first intermediate raft frame 4, and the lower ends of the plurality of SJD type lower layer vibration isolators 1 and the plurality of first limiters 2 are commonly connected with a hull mounting clamp 3, which can effectively play a protective and buffering role.

[0043] Reference Figure 3-4 The deck support assembly includes a plurality of lower-layer vibration isolators 10 installed at equal intervals at the lower end of a second intermediate raft frame 12, a plurality of second limiters 9 are installed at equal intervals on both sides of the lower end of the second intermediate raft frame 12, and a mounting deck 11 is fixed to the lower ends of the plurality of lower-layer vibration isolators 10 and the plurality of second limiters 9, which can effectively play a protective and buffering role.

[0044] Reference Figure 1-2 The three first cooling pumps 6 are composed of two generator set cooling water pumps and a refrigeration cooling water pump, and the two second cooling pumps 7 are two air conditioning cooling water pumps.

[0045] Reference Figure 1-2 , after the six water pumps, fire pumps, cooling pumps, seawater pumps and other vibration sources in the pump room are combined, they are elastically installed on the upper plane of the raft through the upper vibration isolator group. The raft supporting the pump group is elastically installed on the hull base through the lower vibration isolator group, forming the entire fire protection and seawater cooling pump group module anti-shock vibration isolation floating raft device. The combined pump group anti-shock vibration isolation floating raft device consists of upper EAB type vibration isolator groups of various specifications, rafts, lower SJD type vibration isolator groups, various valves, pipes, pressure gauges, adjustment pads, limiters, flexible pipes, etc.;

[0046] Reference Figure 3-4After the vibration sources of the two diesel generator sets in the engine room are combined, they are elastically installed on the raft base through the upper vibration isolator group. The raft supporting the generator set is elastically installed on the hull base through the lower vibration isolator group to form the entire diesel generator set anti-impact vibration isolation floating raft device. The combined diesel generator set anti-impact vibration isolation floating raft device consists of an upper specification SJZ type vibration isolator group, a raft, a lower SJD type vibration isolator group, an adjustment pad, a limiter, fasteners, etc.

[0047] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A ship-use anti-shock and vibration-isolating floating raft device, comprising a first intermediate raft frame (4) and a second intermediate raft frame (12), characterized in that: A raft support assembly is installed at the lower end of the first intermediate raft frame (4), and a deck support assembly is installed at the lower end of the second intermediate raft frame (12); A fire pump (8), three first cooling pumps (6) and two second cooling pumps (7) are installed at the upper end of the first intermediate raft (4); EAB type upper vibration isolators (5) are fixed at the four corners of the lower ends of the first cooling pump (6) and the second cooling pump (7); and the EAB type upper vibration isolators (5) are installed at the upper end of the first intermediate raft (4); Diesel generator sets (14) are installed on both sides of the upper end of the second intermediate raft frame (12), and an upper vibration isolator (13) is installed between the two diesel generator sets (14).

2. The anti-shock and vibration-isolating raft device for ships according to claim 1, characterized in that: The raft support assembly comprises a plurality of SJD type lower vibration isolators (1) installed at equal intervals at the lower end of a first intermediate raft frame (4); a plurality of first stoppers (2) are installed at equal intervals at the lower end of the first intermediate raft frame (4); and the lower ends of the plurality of SJD type lower vibration isolators (1) and the plurality of first stoppers (2) are commonly connected to a hull mounting clamp (3).

3. The anti-shock and vibration-isolating raft device for ships according to claim 1, characterized in that: The deck support assembly comprises a plurality of lower vibration isolators (10) installed at equal intervals at the lower end of a second intermediate raft frame (12); a plurality of second limiters (9) are installed at equal intervals on both sides of the lower end of the second intermediate raft frame (12); and a mounting deck (11) is fixed to the lower ends of the plurality of lower vibration isolators (10) and the plurality of second limiters (9).

4. The anti-shock and vibration-isolating raft device for ships according to claim 1, characterized in that: The three first cooling pumps (6) are composed of two generator set cooling water pumps and a refrigeration cooling water pump, and the two second cooling pumps (7) are two air conditioning cooling water pumps.

5. The anti-shock and vibration-isolating raft device for ships according to claim 1, characterized in that: An instrument bracket is installed at the upper end of the first intermediate raft (4).

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