Silica Sol Investment Casting For Marine Windlass

Product Introduction

Windlass

The windlass is a mechanical device for throwing, anchoring, and reeling in the cable, which is located at the bow of the ship. The rollers on both sides of the sprocket can be used for twisting the cable. Windlass can be divided into manual windlass, electric windlass, electro-hydraulic windlass, and steam windlass according to different power. At present, the windlasses on seagoing vessels are mainly electro-hydraulic windlasses and electric windlasses. On the tankers built in the early stage, steam anchors were also used for fire and explosion protection. In order to control the operation of the windlass, the power windlass is equipped with a master controller, which can perform reversing operations and multi-stage variable speed control.

1. The manual (manual) windlass is suitable for ships whose anchor mass does not exceed 250kg, and measures to prevent the handle from injuring people are to be provided.

2. The power source of the electric windlass is the electric motor, which drives the main shaft to rotate after multi-stage deceleration by the large and small gears in the reduction box. Due to the high requirements for the reduction ratio, the reduction mechanism is relatively large, and it is mainly used for small and medium-sized ships.

3. Electro-hydraulic windlass is also called hydraulic windlass. The electric motor drives the hydraulic pump, and the oil pressure generated drives the oil motor, and then the windlass runs through a reducer (or without a reducer). It has a compact structure, small size of power and transmission parts, stable operation, and good speed change performance, but it requires high manufacturing technology and maintenance and is widely used in modern large and medium-sized ships.

The steam windlass is driven by a steam engine, and the gear drives the drum shaft to run through the crankshaft. It is characterized by large power and simple structure. When using a steam windlass, the cylinder should be warmed up in advance, and the residual water vapor in the cylinder should be exhausted after use. When it is cold, it is necessary to run a sports car (keep idling) in order to prevent freezing.

All kinds of windlasses have different power parts, but their functional parts are basically the same, that is, they all include sprockets, twisted cable drums, clutches, and brakes. These functional components are all arranged on the same powered spindle. The twisted cable drum (auxiliary drum) at the end of the main shaft generally rotates with the main shaft, and the sprocket is controlled by an independent clutch and brake. When the clutch is closed, the sprocket and the main shaft bite together and can rotate together with the main shaft, so that the anchor chain can be twisted in or out. When the clutch is disengaged, the sprocket does not rotate with the main shaft, and the anchor or cable twisting operation can be performed. The brake is used to break the anchor chain or control the speed of loosening the chain. When the brakes are tightened, the sprocket is fixed on the windlass body and cannot rotate. Ships can generally be provided with a double chain wheel windlass. For large ships or ships with large bulbous bows, two single-sprocket windlasses (or single-side windlasses) separated from the left and right are often installed because of the large distance between the left and right anchor chain barrels.

Windlasses are divided into horizontal windlass and vertical windlass according to their layout. Horizontal windlasses are widely used in modern transport ships, and their main shafts are arranged horizontally. For the convenience of tying and unmooring operations and adjusting the force of the cable, modern ships often use an anchor-mooring combination machine, which combines a windlass and a mooring winch into one. In addition to the auxiliary drum at the end of the main shaft, there is also a mooring winch (main drum) on the windlass main shaft, which, like the sprocket, is driven by the main shaft and controlled by an independent clutch and brake. Close the clutch to reel in or release the cable. After the cable is tightened, the brakes are tightened to keep the cable under stress without moving to the cable pile. The sprocket shaft of the vertical windlass is perpendicular to the horizontal plane. This arrangement can reduce the deck area occupied by the windlass, which is more common on warships.

There are also automatic windlass and remote windlass. The former is equipped with a chain-length sensor in the automatic hydraulic windlass system. When the anchor is thrown out, the Silica sol investment casting for marine windlass will automatically stop; when the anchor is lifted, the anchor will approach the chain cylinder It can slow down automatically, and it will automatically stop when the anchor shaft enters the chain barrel and is fully retracted. The latter is a windlass that can be remotely operated from the bridge, and its throwing and anchor operations can be remotely operated from the bridge.

Detection Systems

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