RU2670341C1 - Engine-propulsion module of ring structure - Google Patents

Abstract

FIELD: construction.SUBSTANCE: invention relates to the field of underwater shipbuilding, in particular to propulsion electric power plants with propulsion motors, and can be used in shipbuilding. Engine-propulsion module of the ring structure contains a fairing, which is an element of the light hull forming the aft end of the apparatus, a multi-blade propeller with a large-diameter hub, a propulsion motor, a thrust bearing and thrust bearings. Device is made in the form of a module located outside the sturdy hull of the aft end of the underwater vehicle, a second propeller motor and a propeller are introduced into the construction of the aft end – the engine-propulsion module of the reversed ring structure. As a rowing electric motor, two ring synchronous electric machines of the reversed type with excitation from permanent magnets are used, where the rotor of each of the rowing ring synchronous electric machines is structurally integrated with a multi-bladed propeller with a large diameter hub. Propellers are movably connected to the supporting structure and the stator through the support and thrust bearings and rotate in mutually opposite directions, the blades of each of the propellers are oppositely directed.EFFECT: reduction in the level of the submarine noise of the apparatus is achieved, along with increased propulsive efficiency and the possibility of placing the towed hydroacoustic means of monitoring and monitoring underwater conditions.1 cl, 3 dwg

Description

The invention relates to the field of submarine construction, in particular to propulsion power plants with propeller motors and can be used in shipbuilding.

Famous ship electromotive system with twin-screw propulsion module of ring design (patent for invention No. 2522733, published 11/12/2012), adopted as an analogue. The system consists of two ring-type thrusters based on synchronous electric machines with excitation from permanent magnets with coaxially mounted rotors, in the cavities of which propellers with oppositely directed blades are installed, and the speeds of multidirectional rotation are set and controlled separately.

The disadvantages of this analogue include:

- the design does not allow equipment to be placed in the aft end, which allows to increase the combat effectiveness of the submarine and its protection, as well as towed sonar tools for monitoring and controlling the underwater situation;

- steering devices, with such a design, may be placed only in front of the propeller, which will require the need to increase the steering wheel area to ensure the required controllability of the submarine;

- restriction on the diameter of the screw by the case of the propulsion system of the ring structure, which does not allow to reduce the frequency of the rotations of the screw by increasing the total area of its blades to improve the vibro-acoustic characteristics of the installation. With such a design, this problem can be solved only by increasing the dimensions of the propulsion system, which will make the device excessively bulky, worsening the hydrodynamic characteristics of the device.

Known installation in the aft end of the submarine (patent for the invention №2166456, published 10.05.2001), adopted for the prototype, containing a durable and lightweight body, movably mounted propeller, for which a lightweight body breaks. The propeller is movably mounted on a sturdy housing, on a thrust bearing.

The transmission of torque from the propeller motor to the propeller is made through a bevel gear (the first bevel wheel is fixed on the propeller hub, the counter part is fixed on the propeller shaft of the propeller motor). The propeller shaft emerges from the sturdy hull through the deadwood with a seal that prevents water from penetrating the robust hull, while ensuring the uniform rotation of the shaft.

The disadvantages of this prototype are:

- excessive design complexity (the presence of a gear), which leads to deterioration in the reliability of the device, decrease in efficiency, deterioration of vibro-acoustic characteristics and, consequently, increase in the level of underwater noise (primary acoustic field), complicate the technology of manufacturing, installation and maintenance of equipment, making the device low-tech ;

- the need to seal a durable housing using a stern seal, which degrades the reliability of the device, requires additional maintenance, when the shaft rotates an additional friction force acting on the shaft;

- the need for a gear lubrication system and other friction surfaces of the elements of the main power circuit;

The problem solved by the invention is to improve the vibro-acoustic characteristics of the propulsion system, to increase the propulsive efficiency, to provide the ability to place it in the stern of a submarine, underwater technical means or an uninhabited underwater vehicle (hereinafter referred to as the device), equipment that increases its combat effectiveness and protection from the stern. , including towed hydroacoustic means of monitoring and control of the underwater situation, as well as reduce the cost of production and installation.

The problem is solved due to the fact that the propulsion module of the reversed annular structure contains a fairing which is an element of the light body of the device that forms the feeding end of the vehicle, a multi-blade propeller with a large diameter hub, a propeller motor, support and thrust bearings. The device is designed as a module located outside the robust aft end of the submersible, the second rowing motor and the propeller are introduced into the aft tip design of the motor-propulsion module of the reversed ring structure; two ring synchronous electrical machines with excitation from permanent magnets, where the rotor of each of the rowing ring synchronous electric machines is structurally integrated with multi-blade rowing screw with large diameter hub; propellers are movably connected to the supporting structure and the stator through the supporting and thrust bearings and rotate in opposite directions, the blades of each of the propellers oppositely directed.

The propulsion module of the ring structure is fixed on the aft end of the apparatus; two rowed ring synchronous electrical machines of reversed type are used with excitation from permanent magnets placed successively on the same axis; the rotors of the rowan ring synchronous machines are structurally combined with their propellers rotating in opposite directions, with separate control of two propeller-type ring synchronous electric machines of reversed type with excitation from permanent magnets (hereinafter - the electric motor) according to the criterion of the lowest noise level or the greatest stop.

FIG. 1 shows a diagram of a motor-propulsion module of a reversed annular structure, comprising: supporting device 1, propellers 2 and 3 combined with rotors of electric motors, thrust bearing 4 of annular shape, stators 5 and 6, fairing 7.

FIG. 2 shows a three-dimensional mapping of the aft end - the propulsion module of the reverse ring structure.

FIG. 3 shows section A-A of FIG. 1 electric motor containing: propeller 2 structurally aligned with the rotor of the electric motor, stator 5, permanent magnets 8, support bearing 9, poles with phase windings 10, propeller blade 11. The design of the second electric motor is similar to the design of the above (Fig. 3).

Electric motors are made in the form of two annular synchronous electrical machines of reversed type with excitation from permanent magnets (Fig. 1) located on the same axis, consisting of stators 5 and 6 with phase windings 10, propellers 2 and 3 are made with a single assembly unit with rotors of electric motors; the module contains two propellers 2 and 3 rotating in opposite directions. Propeller 2 and 3 are made with a large diameter hub, which coincides with the diameter and contour of the forming line of the body of the apparatus, the blades 11 of the propellers 2 and 3 are oppositely directed, the propellers 2 and 3 are connected to the rotors of their electric motors, each rotor is combined with the propeller hub 2 or 3. Each propeller 2 and 3 is movably mounted, supported by support bearings 10 (FIG. 3), located on the outer surface of the electric motor stators 5 and 6.

Description of the motor-propulsion module of the reversed annular structure in a dynamic state: during rotation of the propellers 2 and 3, rotating in opposite directions, the emphasis created by propellers 2 and 3 is transferred to the thrust bearing 4 of an annular shape, located symmetrically with respect to the propeller, on the stern and fore parts of the support structure 1 (Fig. 1). The mutual arrangement of the propellers 2 and 3 on the same axis is parallel, when rotating in mutually opposite directions, turning the blades 11 of each propeller 2 and 3 in opposite directions relative to the blades of the adjacent screw, allows straightening the flow of fluid passing through the flow part of the screw. The number of blades 11 on each propeller 2 and 3 significantly exceeds the number of blades of the classic propeller, which makes it possible to reduce the height of the blades 11, reduce cavitation, significantly lowering the speed of rotation of the propellers 2 and 3, while maintaining the required stop. The shape of the blades should provide an emphasis in the horizontal direction and a uniform, continuous flow around the fairing 7, minimizing the influence of the phenomenon of suction of the aft end of the apparatus.

The thrust bearings 9 and the thrust bearings 4 are made of antifriction material, lubrication and cooling of which is provided when the screws 2 and 3 rotate by flowing the surrounding water through them. On the aft, end part of the device, a fairing 7 is fixed, which forms the aft end of the apparatus and ensures, during operation of the apparatus, uniform flow of fluid around the body of the apparatus, reducing the natural leakage of the fluid into the apparatus body.

The technical result of the implementation of the invention is to reduce the level of underwater noise of the apparatus, from the work of the propulsion unit and the mechanisms of the hydraulic propulsion unit, reducing the cost of the electrical propulsion system and the possibility of placing it in the stern of the apparatus, equipment, which allows to increase the combat effectiveness and protection of the apparatus, as well as the possibility of placing towed sonar observation devices and control of the underwater situation.

In this technical solution, due to the exclusion from the design of the gear unit, propeller shaft and stern gear, an increase in structural reliability is achieved, and the removal of the module from the robust hull provides the possibility of accommodating additional equipment, weapons and improves the habitability of the ship. The multi-blade design of the propeller with the increased, compared to the propeller of the traditional design, the hub diameter and the reduced height of the blades, based on the calculation of the required stop, can significantly reduce the frequency of rotation of the propellers and cavitation of the blades.

The presence of two parallel-mounted propellers with counter-rotating blades rotating in opposite directions will increase the propulsion efficiency, reliability of the propulsion system, obtain maximum power by summing up the powers of two separate electric drives, and also mutually compensate for their own vibro-acoustic components at certain ratios in the range of rotational frequencies, with separate control of two inverted-type electric motors with excitation HAND of the permanent magnets on the criterion of the lowest noise level or the highest it will go. Also, the absence of a propeller shaft, a gear train, a stern seal, the absence of noise created by these mechanisms and a reduction in the speed of rotation of the propellers will significantly improve the vibro-acoustic characteristics of the propulsion system and the propulsion complex as a whole.

Claims (1)

The propulsion module of the ring structure contains a fairing, which is an element of the light body of the aft-forming apparatus, a multi-blade propeller with a large diameter hub, a propeller motor, support and thrust bearings, characterized in that the device is designed as a module placed outside the strong body of the aft end the underwater vehicle, in the design of the aft end - the propulsion module of the reversed annular structure is introduced the second rowing ele rotor and propeller, two ring synchronous electric machines of reversed type with excitation from permanent magnets are used as electric motors, where the rotor of each of the propeller ring synchronous electric machines is structurally combined with a multi-blade propeller with a large hub diameter, the propellers are movably connected to the supporting structure and the stator through the bearing and thrust bearings and rotate in mutually opposite directions, the blades of each of the propellers opposite be directed.

Images