Screw rudder complex

FIELD: transportation, engines and pumps.

SUBSTANCE: ship screw rudder complex incorporates a drive engine arranged above the ship water line and linked with the ship shaft running in bearing in the nacelle below the water line, the said shaft being coupled with the screw shaft accommodating the propeller screw fitted thereon. The said complex comprises also a top shaft arranged parallel to the lower shaft and coupled with the drive engine output shaft. The top and lower shafts are crankshafts coupled via a con-rod mechanical transmission arranged between them and furnished with rod bearings. Rod and main bearings of the lower crankshaft are water-lubricated plain bearings. The nacelle space can communicate with outboard.

EFFECT: higher reliability and efficiency of screw rudder columns.

3 cl, 2 dwg

 

The invention relates to the field of shipbuilding and concerns create propulsion, viitorului and thruster systems and can be used on ships of various types and purposes.

Known winterholiday complex in the form of winterholiday angular column type "AquaMaster" (prototype), which torque from a drive motor, for example a diesel engine or electric motor, located above the waterline (usually in the aft end of the ship)is transmitted to the propeller shaft located below the waterline, with angular gear (UR) (see ad. the prospectus of the company Aquamaster - Rauma Ltd., 2005).

UR housed in a sealed enclosure (gondola), filled with lubricating oil. The output shaft of UR passes through the stern unit (seal) and is connected through the clutch and the main thrust bearing with CP propeller.

The disadvantages of this device are:

- the presence of sterngear, which cannot completely exclude the ingress of water into the gearbox, which reduces the reliability of the entire device, since the gearbox may not work in flooded oil;

- the presence of angular reduction gear, which leads to increased levels of noise and vibration (structural and underwater component);

- large diameter gondola, which is lower angular gear and the main thrust bearing, sravnenie the diameter of the propeller, that reduces the propulsive efficiency of the propeller.

The last disadvantage is the fact that the high power transmitted by the angular transmission to the propeller, it requires the use of gears of large diameter. At the same time propulsive efficiency (efficiency) depends on the ratio of the diameter of the gondola to the diameter of the propeller - Kd. The smaller Kdthe higher the COP. Currently viitorului complexes with angular gearboxes (and also in the version with built-in gondola rowing motors) value To adis in the range of 0.5-0.6.

The task of the invention is to eliminate these disadvantages of the known device.

This is achieved by the fact that venerolog complex vessel containing the drive motor, located above the waterline of the vessel and which is connected through a mechanical transmission with placed on the bearings in the gondola below the waterline of the vessel shaft, which is connected with the propeller shaft with the installed propeller screw, put the upper shaft located parallel to the lower shaft and coupled with the output shaft of a drive motor. Thus the top and bottom rolls are made in the form of a crankshaft connected to each other through placed between the mechanical transmission in the form of a rod mechanism, osnashennom the connecting rod bearings. Moreover, rod and main bearings at the lower crankshaft made in the form of working in a water-lubricated bearings, and the gondola is made with the possibility of the message of the cavity with sea water.

When this crank mechanism with a view to narrowing the middle part of the pylon, which is attached gondola, and thus reduce the drag of the pylon can be made in the form of crosshead mechanism. In addition, rod and main bearings of the lower crankshaft equipped with liners, made on the basis of metal or of plastics.

In addition, the gondola with the pylon can be made with the possibility of rotation around the vertical axis to realize the function of controlling the direction of movement of the vessel.

The introduction of two parallel crankshafts, transmission time of the primary engine for propeller caused by the ability of the crank mechanism to work in the aquatic environment unlike the prototype, whose angular gear can only work when filled with oil of the gearbox, which required the use of complex and unreliable sterngear. Replacement of sterngear to conventional sliding bearing and filling gondola sea water increases the reliability venerolog complex. Radius kr is Osipov can be several times smaller than the radius of the gears used in the prototype, which reduces the diameter of the gondola.

The efficiency of the propeller depends essentially on the diameter of the gondola, but practically (within certain limits) does not depend on its length. This circumstance allows to increase transmitted to the propeller power, increasing the number of cranks on the shafts, i.e. the length of the crankshaft, while maintaining the small radius of the crank, and hence gondola in General.

The nature of the interaction elements of the crank mechanism is different from the kinematics of gears. And in indigenous and Motulevich neck plain bearings, which work reliably in water with the use of modern cermet or carbon materials.

Performing communication between the crankshafts using a crosshead mechanism allows to reduce the cross-sectional area of the pylon, which strengthened the gondola, and thus to reduce the head resistance of the underwater part venerolog of the ship.

The device proposed venerolog complex vessel is illustrated by a drawing, in which figure 1 schematically shows a General view venerolog complex, and figure 2 is a side view of the device in figure 1.

The device includes a drive motor 1, which can be used is the Vanir any primary engines used in shipbuilding (diesel, diesel-gear unit, gas or turboreactor unit, a propeller motor, with an output shaft 2 which is connected to the upper crankshaft 3, which is connected through the connecting rods 4 and the crosshead crosshead mechanism 5 with the lower crankshaft 6, placed in the gondola 7, and one end of the lower crankshaft via the main thrust bearing 8 is connected with the propeller screw 9. The lower the crankshaft 6 has main bearings 10 and connecting rod bearings 11. Winterholiday complex attached to the hull 12 and is located below the waterline.

The device operates as follows.

The drive motor 1 rotates the upper crankshaft 3. Torque through a system of rods 4 and the crosshead crosshead mechanism 5 is transmitted to the lower crankshaft 6 that is located below the waterline of the vessel and working in the gondola 7 filled with sea water. Bottom indigenous 10 and connecting rod bearings 11 are in the water. The carrying capacity of water as lubrication of plain bearings is lower than that of lubricating oil. However, the bearings on the basis of metal or of plastics, for example, type "M" in tandem with the material "Anita-10 successfully used in modern Sterns devices of propeller shafts and bearing assemblies submersible pumps, rotary mechanisms hydroelectric is antsy and are a great resource.

Calculations show that the ratio of the diameter of the gondola to the diameter of the propeller using a crank transmission can be reduced to values of Kd<0.25 in. This circumstance leads to a significant increase in the efficiency of the propeller compared to the prototype.

The use of modern materials for the bearings of the crank mechanism ensures its reliable operation is not in oily environments, and in the water. This eliminates the disadvantage of the prototype venerolog complex and sterntube device can be excluded from its composition.

The presence of a crank transmission in the proposed winterbloom complex vessel allows you to get rid of high vibratory activity inherent in the prototype, because the crank-connecting rod mechanisms in the frequency range of spins the propellers operate almost silently, that allows to speak about the elimination of such a drawback inherent in the gears.

1. Winterholiday complex vessel containing the drive motor, located above the waterline of the vessel and which is connected through a mechanical transmission with placed on the bearings in the gondola below the waterline of the vessel shaft, through which the main thrust bearing is connected with the propeller shaft with the installed propeller screw, characterized in that the complex is entered top the second shaft, located parallel to the lower shaft and coupled with the output shaft of a drive motor, while the upper and lower shafts are made in the form of a crankshaft connected to each other through placed between the mechanical transmission in the form of a rod mechanism, equipped with a connecting rod bearings, and rod and main bearing lower crankshaft made in the form of running on water lubricated bearings, and the gondola is made with the possibility of the message of the cavity with sea water.

2. Winterholiday complex vessel according to claim 1, characterized in that the rod and main bearings of the lower crankshaft equipped with liners, made on the basis of metal or of plastics.

3. Winterholiday complex vessel according to claim 1, characterized in that the connecting rod mechanism is in the form of a crosshead mechanism.

4. Winterholiday complex vessel according to claim 1, characterized in that the gondola is made with the possibility of rotation around the vertical axis.



 

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FIELD: transportation, engines and pumps.

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EFFECT: higher reliability and efficiency of screw rudder columns.

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