RU2678732C1 - Submersible device with fin propeller - Google Patents

Abstract

FIELD: engines and pumps.SUBSTANCE: invention relates to the field of ship propulsion. Submersible device with fin propeller comprises a hull, a power plant, control mechanisms and a fin propeller, which consists of a sequence of surfaces with rigid ribs that perform movements in a chain hitch equipped with hinges, which are equipped with torsion springs and dampers, ensuring the occurrence of an adjustable hydroelastic effect.EFFECT: invention can be used in the design of small underwater robotic tools.1 cl, 2 dwg

Description

The invention relates to the field of ship propulsion and can be used in the design of small underwater robotic equipment.

Known fin mover, built for the model of the ship under the leadership of G. Hertel (see Hydrobionics in shipbuilding under the editorship of IM Petrov / IM Petrov. - M.: TSNIITEIS Publishing House, 1970. p. 100-101). The fin mover consists of a fin performing translational-rotational vibrations, a drive of transverse movements of the fin, a drive of rotational movements of the fin. The fin is a rectangular metal sheet of constant thickness.

The design drawback is that this form of the fin is not optimal compared to the wing profile and leads to significant flow stalls when the fin moves. This, in turn, worsens the propulsive characteristics of the fin mover and increases the energy cost of moving a floating object.

Known fin type "flapping wing" developed by the Norwegian company "Wave Control Co" and using the pitching energy of the vessel (see Slizhevsky NB Hydrobionics in shipbuilding / NB Slizhevsky. - Nikolaev: Publishing house UMTU, 2002. p. 98-99). The fin mover consists of a horizontally positioned flapping wing mounted on special racks in the bow of the vessel. When pitching, the nasal extremity performs vertical harmonic oscillations, due to which the horizontally located wing performs translational-rotational vibrations. Thus, a horizontal component of hydrodynamic force arises on the flapping wing, pushing the vessel forward.

The disadvantage of this mover is the dependence of its effective operation on weather conditions - sea waves. At the same time, its propulsive qualities may deteriorate and, accordingly, an increase in energy costs for vessel movement.

Also known fin mover, adopted as a prototype (see US Pat. No. 2360831 "Ship with fin mover", publ. 10.07.2009, class IPC: B63H 1/36). The mover consists of a sequence of flexible strip surfaces with rigid ribs that perform displacements in a chain coupler that defines the angles of inclination of the rigid ribs tangentially to the traveling sinusoid, which at different times forms geometrically complex saddle surfaces with strictly specified deformation rates of the surface of the flapping wing.

The disadvantage of the mover is that the movement of the flexible strip surfaces occurs according to a sinusoidal law, which may not be optimal for ensuring propulsive qualities of the mover. Thus, it is possible to increase energy costs for the movement of a floating object.

The objective of the invention is to develop a new fin mover, consisting of a system of surfaces with a high propulsive efficiency, which, in turn, reduces the energy cost of moving an underwater vehicle with a fin mover.

The technical result consists in reducing energy costs for the movement of an underwater vehicle with a fin mover due to the use of an adjustable hydroelastic effect, which occurs when the stiffness and damping characteristics in the hinges are selected so that the oscillation frequency of the first surface, specified by the control mechanisms, coincides with the main natural frequency of the entire surface system.

This object is achieved in that the underwater vehicle with a fin mover comprises a body, a power plant, control mechanisms and a fin mover. The fin mover consists of a sequence of surfaces with rigid ribs that perform movements in a chain hitch equipped with hinges. The hinges are equipped with torsion springs and dampers, providing a hydroelastic effect

The invention is illustrated by drawings:

in FIG. 1 shows a diagram of an underwater vehicle with a fin propulsion;

in FIG. 2 shows a hinge device.

An underwater vehicle with a fin mover comprises a housing 1, a power plant 2, control mechanisms 3 and a fin mover, consisting of surfaces 4-7 and rigid ribs 8-11, as well as chain couplings 12-14 equipped with hinges 15-17. Each hinge 15-17 consists of a torsion spring 18 and a damper 19.

An underwater vehicle with a fin mover operates as follows. A power plant 2 is located inside the housing 1, supplying control mechanisms with energy 3. The control mechanisms 3 define the translational-rotational vibrations 4 of the surface 4, which are transmitted to the surfaces 5-7 by means of chain couplings 12-14. The oscillation frequency of the surface 4 coincides with the fundamental natural frequency of the system of surfaces 4-7 (Fig. 1). The fundamental natural frequency is determined based on the stiffness characteristics of the torsion springs 18 and the damping of the dampers 19 (Fig. 2). Thus, conditions are created for the emergence of a controlled hydroelastic effect.

As a result, a new underwater vehicle with a fin mover, consisting of a system of surfaces with improved propulsive qualities, has been developed, as a result of which the energy costs for moving an underwater vehicle with a fin mover are reduced.

Claims (1)

An underwater vehicle with a fin mover, consisting of a hull, a power plant, control mechanisms and a fin mover, consisting of a sequence of surfaces with rigid ribs moving in a chain hitch equipped with hinges, characterized in that the hinges are equipped with torsion springs and dampers, providing an adjustable hydroelastic effect.

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