Marine gearboxes, as special gear transmission devices for ships, play a key role in ship power systems. This article introduces the various types and functions of marine gearboxes, including gearboxes for work ships, high-speed ships, adjustable-pitch ships, and engineering ships. Among them, Hangzhou Advance Gearbox has performed outstandingly in the field of marine gearboxes, with a wide range of product types and advanced technology, occupying an important market position.
Overview
The marine gearbox is the main propulsion transmission device of the ship’s power system. It has the functions of reversing, clutching, reducing speed and bearing propeller thrust. It is matched with the diesel engine to form the ship’s power system. It is widely used in various passenger and cargo ships, engineering ships, fishing boats, offshore and ocean-going ships, yachts, police boats, military ships, etc. It is an important key equipment in the shipbuilding industry.
Marine gearboxes are of various forms, and the common ones are reduction gearboxes, clutch reduction gearboxes, reversing and clutch reduction gearboxes, multi-speed gearboxes, multi-branch transmission gearboxes, multi-machine parallel gearboxes, and fuel-diesel combined power transmission gearboxes. According to the purpose, it can be divided into ship main propulsion transmission and auxiliary engine transmission, ship operation machinery transmission; according to the working conditions, it can be divided into light-load high-speed ships and medium and heavy-load ships. In terms of transmission form, there are fixed-pitch transmission gearboxes and variable-pitch transmission gearboxes; in terms of structural form, there are parallel shaft transmission and angle transmission, with the same center, horizontal different center, vertical different center, etc.
Marine gearboxes mainly include work ship gearboxes, high-speed ship gearboxes, adjustable propeller ship gearboxes, engineering ship gearboxes, etc.
Product Type
Workboat gearbox
The gearbox for working ships mainly includes small, medium and high power marine gearboxes. The gearbox clutch is a hydraulically operated wet multi-plate friction clutch, which can be operated by pneumatic, electric or manual operation. The hydraulic pressure has a working oil pressure step-up function (time adjustable), and the power gear is made of high-quality alloy steel through carburizing, hardening and grinding. The small and medium power gearbox series has different reduction ratio ranges, and the maximum transmission capacity reaches a certain value. Through continuous innovation, product specifications and technical indicators are continuously improved, and a series of dual-speed products have also been developed.
High speed marine gearbox
This series of marine gearboxes is mainly suitable for the main propulsion transmission of ships with fixed-pitch propellers and light load conditions. There are mainly several series. The gearbox clutch type is a hydraulically operated wet multi-plate friction clutch with various operating methods. The hydraulic pressure has a working oil pressure increase function (time adjustable), and the power gear is made of high-quality alloy steel through carburizing, hardening and grinding. Different series of high-speed marine gearboxes have different characteristics and applicable scenarios. Some of them use aluminum alloy boxes with high configuration requirements, which are suitable for high-speed yachts, speedboats, high-speed passenger ships and other matching. Among them, the light marine gearbox with micro-control has reached the international advanced level of innovation and is used in sightseeing yachts, leisure boats, etc.
Adjustable paddle marine gearbox
This series of marine gearboxes is mainly suitable for main propulsion transmission of ships with variable pitch propellers under heavy load and continuous working conditions. There are mainly multiple series, and the gearbox and adjustable pitch propeller form a ship power unit. Different series of gearboxes have different speed ratio ranges, transmission capabilities, input speeds and other characteristics, and have functions such as clutch reduction, and the output end can be equipped with auxiliary power output shafts and other devices. This series of gearboxes and marine main engines form a marine power unit, which is suitable for various passenger and cargo ships, fishing boats and engineering ships, offshore platform work boats, etc. equipped with variable pitch propellers. Hangzhou Forward Gearbox has achieved the ability to supply complete sets of ship propulsion systems, and its products have been used in the domestic market and exported to the European market.
Engineering marine gearbox
Engineering marine gearboxes mainly include clutch transfer cases, clutch reduction cases, transfer cases, reduction cases and speed increase cases. The products have various functions, and the loads are usually mud pumps, generators and oil pumps, with 2-12 branch transmission heads. There are many types of products on the market, suitable for different engineering scenarios.
Overview of the development of the marine gearbox industry
Marine gearboxes are an industry with a high degree of industrial concentration. In the domestic marine gearbox industry, Hangzhou Qianjin Gearbox has occupied an important position with its advanced technology and a wide range of product types, especially in the small and medium-power marine gearbox market.
