阅读说明：本技术 推进轴系接地结构 (Grounding structure of propulsion shaft system ) 是由 杨海艳 刘丽媛 于 2018-09-12 设计创作，主要内容包括：本发明公开了一种船用推进器轴系接地结构,包括监测电刷,接地电刷,还包括滑环组件,设于船体的推进器轴外径上,与推进器轴相接触。与现有技术相比,采用滑环结构便于安装和拆卸,避免安装带来的调整困难,消除了因安装繁杂引起的安全隐患。(The invention discloses a marine propeller shaft system grounding structure which comprises a monitoring electric brush, a grounding electric brush and a slip ring assembly, wherein the slip ring assembly is arranged on the outer diameter of a propeller shaft of a ship body and is in contact with the propeller shaft. Compared with the prior art, the slip ring structure is convenient to mount and dismount, the difficulty in adjustment caused by mounting is avoided, and potential safety hazards caused by complex mounting are eliminated.)

1. The utility model provides a marine propeller shafting ground structure, includes the monitoring brush, the ground connection brush, its characterized in that still includes: and the slip ring component is arranged on the outer diameter of the propeller shaft of the ship body and is contacted with the propeller shaft.

2. The marine propeller shaft grounding structure of claim 1, wherein: the slip ring component comprises two semicircular slip rings, holes are formed in two ends of each semicircular slip ring, and the two semicircular slip rings are connected together through bolts.

3. The marine propeller shaft system grounding structure of claim 1 or 2, wherein: the semicircular slip ring is made of copper.

Technical Field

The invention relates to a ship propulsion system, in particular to a grounding device for a ship propulsion shaft system.

Background

Due to the different material of the propeller and the hull of the ship, and the increased eddy current effect, a small current is excited at the contact surface of dissimilar metals, thereby causing corrosion.

When the propeller is static, although dissimilar metals are contacted between the shafting journal and the intermediate bearing and the output bearing (or the main bearing of the main engine) of the gear box, a conductive path is formed between the propeller and the ship body, but the propeller and the ship body are basically at the same potential and cannot cause corrosion.

However, when the shafting rotates, the bearing lubricant between the journal and the bearing forms a lubricating oil film which is considered as a kind of ultimate high resistance layer, effectively isolating the propeller from the hull structure. As the propeller continues to rotate, the small currents generated at the metal surface continue to increase, i.e. the potential difference between the propeller and the hull structure becomes higher and higher, and once the limit conditions are exceeded, the currents discharge through the breakdown of the lubricating film, producing spark erosion which ultimately leads to pitting and flaking of the bearing surface.

Therefore, in order to overcome such a breakdown problem, it is necessary to install a shafting grounding structure to prolong the service life of white metal bearings such as a shafting intermediate bearing and a gearbox output shaft bearing (or a main engine main bearing). The function of the grounding device is to ensure that the propeller and the shafting have good grounding performance no matter in a running state or a non-working state, so that the shafting and the ship body have the same potential, and the corrosion is reduced.

In the existing shafting grounding structure, a copper slip ring is mostly sleeved on a shafting in a hot mode, or a copper slip ring with a gap is used, and after the copper slip ring is sleeved on a shaft, the seam is welded and rounded. Therefore, the installation difficulty is brought, the copper ring needs to be sleeved before the shafting is installed, and the adjustment of the position of the copper ring is very inconvenient. The latter needs to be fired during installation, which brings about potential safety hazard in the ship construction process.

Due to the reasons, the two types of shafting grounding structures are inconvenient to disassemble.

Disclosure of Invention

Aiming at the defects in the prior art, the technical problem to be solved by the invention is to provide a propulsion shafting grounding structure which can be conveniently installed and detached, is convenient to adjust and ensures the safety of loading and unloading.

In order to solve the technical problem, the grounding structure of the propulsion shafting comprises a monitoring electric brush, a grounding electric brush and a slip ring assembly, wherein the slip ring assembly is arranged on the outer diameter of a propeller shaft of a ship body and is in contact with the propeller shaft.

The slip ring component comprises two semicircular slip rings, holes are formed in two ends of each semicircular slip ring, and the two semicircular slip rings are connected together through bolts.

The invention adopts a slip ring component structure, and compared with the prior art, the invention has the advantages and beneficial effects that: the installation and the disassembly are convenient, the adjustment difficulty caused by the installation is avoided, and the potential safety hazard caused by the complex installation is eliminated.

Drawings

The invention will be further described with reference to the following figures and examples.

Fig. 1 is a schematic structural view of the present invention.

Detailed Description

As shown in fig. 1, which is a schematic diagram of a grounding structure of a marine propulsion shafting, the slip ring 3 is composed of two semicircular slip rings, and the two semicircular slip rings are made of copper. The two semicircular sliding rings are arranged on the outer diameter of a propeller shaft 4 of the ship body, gaps are reserved at the joint of the two semicircular sliding rings respectively, rubber pads 5 are padded at the gaps, holes are processed at the two ends of the two semicircular sliding rings, and the two semicircular sliding rings are connected together through bolts. The connected slip ring 3 is fastened with the propeller shaft 4. Thus, the assembly, disassembly and adjustment are very convenient. The monitoring brush 1 and the grounding brush 2 are disposed on the outer diameter of the slip ring 3, and are in contact with the slip ring 3. The monitoring electric brush 1 is connected with a potential measuring box, and the potential measuring box is connected with the ship body. The cable on the grounding brush 2 is connected with the ship body.