By Alice | 12 February 2022 | 0 Comments

What is the surface propeller drive?

The whole complete surface propeller drive assembly should include: marine engine, marine gearbox and propeller. The engine output shaft is connected with gearbox input shaft. And the propeller shaft firstly should connect with a ball couplings then connect the gearbox. This ball couplings should be fixed the boat rear plate.
There is also a radial through hole on the upper sphere, and a trim cylinder is arranged in the radial through hole, and the piston rod of the trim cylinder extends toward the blade side. A bracket is arranged on the propeller shaft, one end of the bracket is fixed on the end of the propeller shaft with a blade, and the other end is pin-connected with the extension end of the piston rod of the trim cylinder. This semi-immersed/surface propeller drive device has adjustable draft and high propulsion efficiency. Suitable for propeller drive of semi-submerged propeller ships.
Sinooutput usually supply the surface propeller drive no more than input max. Power is 1000hp, the assembly is like:
 
And the structure will be as followings:

: Base;
2: Left shaft tilt angle adjustment cylinder;
3: Flange;
4: Left thrust bearing;
5: Left steering cylinder;
6: Left drive shaft;
7: Left propeller;
8: Nut;
9: Right propeller;
10: Right drive shaft;
11: Connecting rod;
12: Ring rubber ring;
13: Right steering cylinder;
14: Hydraulic hose;
15: Right shaft tilt angle adjustment cylinder;
16: Right thrust bearing
One end of the right thrust bearing (16) is connected to the stern plate (17) through a flange (3), the flange (3) is fixed to the stern plate (17) by stainless steel bolts, and the other end of the right thrust bearing (16) is connected to the stern plate (17) by stainless steel bolts. One end of the annular sealing rubber ring (12) is softly connected, the other end of the annular sealing rubber ring (12) is connected with one end of the right drive shaft (10), the other end of the right drive shaft (10) is connected with the right propeller (9), right thrust The bearing (16) and the right drive shaft (10) are both arranged on the same main axis.

One end of the left shaft tilt angle adjustment cylinder (2) is connected with the base (1), and the stainless steel bolt penetrates through the base (1) and is connected with the stern plate (17). The left drive shaft (2) is changed by the left shaft tilt angle adjustment cylinder (2). 6) The longitudinal angle, thereby changing the longitudinal immersion angle of the left propeller.
 
One end of the right shaft tilt angle adjustment cylinder (15) is connected to the base (1), and the stainless steel bolt penetrates through the base (1) and is connected to the stern plate (17). The right drive shaft (15) is changed by the right shaft tilt angle adjustment cylinder (15). 10) The longitudinal angle to change the longitudinal immersion angle of the right propeller.
 
One end of the left steering cylinder (5) is connected to the base (1), a stainless steel bolt penetrates the base (1) to connect with the stern plate (17), and one end is connected to the side of the left drive shaft (6), and the left steering cylinder (5) passes through The hydraulic hose can control the steering angle of the left drive shaft (6).
 
One end of the right steering cylinder (13) is connected with the base (1), the stainless steel bolt penetrates through the base (1) and is connected with the stern plate (17), the other end is connected with the side of the right drive shaft (10), and the right steering cylinder (13) The steering angle of the right drive shaft (10) can be controlled through a hydraulic hose.
 
One end of the connecting rod (11) is connected with the left drive shaft (6), and the other end is connected with the right drive shaft (10). The left drive shaft (6) and the right drive shaft (10) can be linked and synchronized through the connecting rod (11). action.
The blade of the left propeller (7) is provided with an additional part facing the blade surface. This structure can not only increase the structural strength of the blade, but also make the blade generate more lift along the edge.

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