RU181406U1 - Steering column with adjustable pitch propeller - Google Patents

Abstract

The utility model relates to propulsion shipbuilding systems, in particular to propulsion and steering columns with an adjustable pitch propeller. The propulsion and steering column with an adjustable pitch screw consists of a housing, a drive, a shaft line, a propeller with a mechanism for turning its blades, driven by a motor running through a hollow rotor and a shaft line coaxial with it, rotating together with the shaft of the propeller by a rod-pusher of the rocker mechanism slide blade pitch changes driven by a helical gear and gears directly from the rotating shaft line. 1 ill.

Description

The utility model relates to propulsive shipbuilding systems.

Known are traditional designs of propulsive systems in which the vessel is set in motion by means of a screw connected through a shaft shaft to a drive [1].

The disadvantage of such designs is the poor maneuverability of the vessel. Partially this drawback is deprived of the design of the propulsive system, which is a propulsion-steering column with one screw, which has the ability to ensure the maneuverability of the vessel due to the possibility of rotation of the column and, therefore, the thrust vector within 360 ° [2, 3, 4]. The disadvantage of this design is poor controllability of the propeller thrust and negative dynamic processes in the drives during transient changes in the speed of the vessel. The design of the propulsive system with an adjustable pitch of the propeller [5], in which the step is controlled by a control rod located in the hollow part of the shaft, and a hydraulic cylinder, the rod of which is kinematically connected to the control rod by means of a lever connected with the control rod through the earring, is partially deprived of the design .

         The disadvantage of this design is the complexity and large dimensions, which is difficult to implement in propulsion-steering columns.

           Partially indicated drawback is deprived of the design of the propeller with rotary blades [6], which is a prototype and contains a shaft with a hub located on the base, rotary blades, worm gears, electric motors, and the rotors of the electric motors are installed symmetrically around the circumference of the hub and are equipped with a common circular stator.

The disadvantage of this design is its complexity, low reliability associated with a large number of individual drives on each blade, which, as you know, increases the likelihood of failure during operation.

The task to which the utility model is directed is to simplify and increase the reliability of the design of steering columns with adjustable pitch propellers.

This is achieved by the fact that the drive is made in the form of an electric motor, through the hollow rotor of which and the shaft shaft coaxial with it, the rod-pusher of the slider of the rocker mechanism for changing the pitch of the blade, driven by a helical gear and gears from a rotating propeller shaft, passes.

In FIG. 1 shows the design of the propulsion-steering column with a pitch change mechanism for the propeller blades, consisting of a housing 1, an electric motor 2, a rotor 3 of which is rigidly fixed to the shaft of the propeller 4, a slider 5 of the rocker mechanism located in the hub of the propeller 6 with the ability to rotate around its axis by blades 7, connected to a slider, a rod-pusher 8, rotating together with the shaft of the propeller, the threaded end 9 of which forms a helical (preferably roller screw) gear with a nut 10, which installed on bearings inside the sleeve 11, rigidly connected to the propeller shaft, which are made toothings 12, 13, 14 respectively meshing with gears 15, 16, 17, mounted on bearings on the intermediate shaft 18; the torque from the gears 15, 16, 17 to the shaft 18 is transmitted using controlled electromagnetic couplings 19, 20, 21, the gear 22 is rigidly fixed on the shaft 18, which engages with the wheel 23 mounted on the nut 10, the axial movement of the pusher rod, and therefore, the angle of rotation of the blades is monitored by the sensor 24.

The design is as follows. When the clutch 19 is turned on (the clutches 20 and 21 are turned off), the gear wheel 15 is closed with the shaft 18 and the rotation from the shaft of the propeller 4 is transmitted to the nut 10 through the engagement of the wheels 12-15 and 22-23, the total gear ratio of which is unity, while nut 10 and rod 8 rotate with the frequency of the propeller shaft 4, the slider 5 is stationary, the pitch of the blades is fixed; when the clutch 20 is turned on (the clutches 19 and 21 are off), the gear 16 is locked to the shaft 18 and the rotation from the shaft of the propeller 4 is transmitted to the nut 10 through the engagement of the wheels 13-16 and 22-23, the total gear ratio of which is less than one, while the nut 10 rotates with a frequency greater than that of the propeller shaft 4, the rod 8 moves and pushes the slider 5, the pitch of the blades 7 changes (for example, increases) to the desired value, monitored by the sensor 24; when the clutch 21 is turned on (the clutches 19 and 20 are turned off), the gear wheel 17 closes with the shaft 18 and the rotation from the propeller shaft 4 is transmitted to the nut 10 through the engagement of the wheels 14-17 and 22-23, the total gear ratio of which is more than one, while nut 10 rotates with a frequency lower than that of the propeller shaft 4, the rod 8 moves and pushes the slider 5, the pitch of the blades 7 changes in the other direction (for example, decreases) to the desired value, monitored by the sensor 24.

The proposed technical solution is new: the difference from the prototype is the use of an electric motor as a drive through whose hollow rotor and shaft shaft coaxial with it passes the rod-pusher of the rocker of the rocker mechanism for changing the pitch of the blade, driven by a helical gear and gears from a rotating shaft shaft.

Information sources:

1. Hoffman A.D. Propulsion and steering complex and maneuvering of the vessel. L .; "Shipbuilding", 1988, 360 pp .;

2. Patent for utility model RU 114662;

3. www.roils-royce.com;

4. www.schottel.com;

5. Patent RU 2457147;

6. Patent RU 2387573.

Claims (2)

An engine-steering column with an adjustable pitch screw, consisting of a housing, a drive, a shaft, a propeller with a mechanism for turning its blades, characterized in that an electric motor is used as a drive, through which its rotary shaft and the shaft shaft coaxial with it rotate together with the propeller shaft screw rod-pusher slider rocker mechanism for changing the pitch of the blade, driven by a helical gear and gears directly from the rotating shaft.

Images