RU2777848C1 - Partially submersible disc motor in steering guard nozzle - Google Patents

Abstract

FIELD: high-speed vessels.

SUBSTANCE: invention relates to the design of the device for the propulsion and steering complex of high-speed vessels. Partially submerged disc propulsion in the steering guide nozzle is a design of the device for the propulsion and steering complex of high-speed vessels, which consists of a disc, the hub of which is fixed on the propeller shaft. The shaft rotates in a tubular stock in one of the directions, providing the forward or reverse course of the vessel. The stock rotates in the stern tube of a typical stern gear located in the surface part of the ship's stern skeg. The bottom rounding of the skeg repeats the outer radius of the disc rim, and the blades located on the rim go beyond the dimensions of the skeg into the oncoming flow and are protected by the lower half ring of the guide nozzle, and the upper wide half ring of the steering guide nozzle is connected by means of a tiller with a tubular stock and when it turns into one or another side with its bent edge enters the oncoming flow from one of the sides, creates a lateral force, performs the function of a rudder and localizes splash formation. To protect the propeller from contact with the ground, the steering nozzle does not go beyond the ship's draft dimensions. The rotation of the propeller shaft and the rotation of the stock of the propulsion and steering complex is carried out around a common axis.

EFFECT: high technical and operational characteristics are achieved.

1 cl, 6 dwg

Description

The present invention relates to the design of the device for the propulsion and steering complex of high-speed vessels.

The need to use the proposed new type of propeller in the rudder guide nozzle is due to the fact that the partially submerged propellers currently common on high-speed ships have a complex design, limited resource and high cost. In addition, such propellers have low maintainability. A simpler, more versatile and technologically advanced in manufacture and operation design of a partially submerged propulsion unit is required, which would meet all the requirements for strength, reliability, motor resource, maintainability and would create a minimal impact on the surrounding aquatic environment.

Numerous designs of partially submerged Arneson propellers are currently common on fast boats and patrol ships in a wide range of engine power from 150 to 7500 kW, depending on the size of the vessel. All Arneson propellers are significantly moved aft beyond the ship's transom dimensions to ensure smooth flow to the blades, but this requires additional bracing to increase structural rigidity and eliminate vibration. In the later most advanced modifications of the Arneson propulsors, there is no rudder blade, and the vessel is steered along the course by turning the axis of the propeller shaft in a horizontal plane using a hinge link and hydraulic drives. In a small range, it is also possible to adjust the axis of the propeller shaft in the vertical plane. The essential difference between these analogues is that they are a complex cantilever structure of numerous high-precision parts, universal joints, hinges and drives. The main disadvantages of such designs are excessive structural complexity, bulkiness, high cost and vulnerability to mechanical damage to propeller blades during mooring operations and ground contact. In addition, during high-speed movement, such propulsors leave a huge trail of spray behind the stern of the vessel and emit increased noise. So far, a truly universal, simple and technologically advanced design of a complex of partially submerged propulsion and steering gear has not appeared, which, at a moderate cost, would have high reliability, service life and maintainability, as well as maximum protection against mechanical damage.

The objective of the invention is to create a new type of universal ship propulsion steering system with high technical and operational characteristics. The implementation of this task can be ensured by fulfilling the following initial requirements:

- smooth bottom contours of the vessel without protruding parts;

- minimum resistance to the movement of the vessel;

- simplicity, integrity and rigidity of the structure;

- overall structural compactness;

- protection from mechanical damage;

- minimum vibration and noise;

- safety of operation for others;

- minimum level of service;

- fulfillment of classification requirements and safety standards.

To solve the problem and implement all the above requirements, the author proposed a completely new, combined into a single complex, design of a partially submerged disk multi-blade propulsion device and a steering device in the form of a rotary guide nozzle. The technical novelty of this complex lies in the fact that the proposed version of the propeller is a multi-blade disk partially submerged in water in the steering guide nozzle. The disk hub is fixed on the propeller shaft, which rotates in the stern tube device, located in the surface part of the ship's stern skeg. In this case, the blades on the disc rim extend beyond the dimensions of the bottom radius part of the skeg into the oncoming flow. A tubular stock passes directly through the stern tube connected by means of a tiller with a rudder guide nozzle. In all other respects, the stern tube device has a typical design of components and parts, basic dimensions, materials used, and is manufactured according to existing industry standards. The rotation of the propeller shaft with the disk for forward or reverse movement is carried out through the reverse gear by the main engine, and the rotation of the steering nozzle in one direction or the other with the help of a hydraulic drive. To ensure the smoothness of the oncoming flow to the blades, the bottom radius rounding of the skeg R is equal to the outer diameter of the disc rim, and the gap between the lower edge of the skeg and the disc rim is closed by a bottom spoiler. An indispensable condition for the protection of the propulsor and the guide nozzle from significant mechanical damage is that, with any load, their penetration does not go beyond the draft dimensions of the vessel T. The steering guide nozzle consists of two connected half rings. The upper wide semi-ring has edges smoothly bent towards the axis, which, when the nozzle is turned in one direction or another, enter the oncoming flow, create a lateral force and perform the function of a rudder. The lower wing-shaped guide semi-ring forms and directs the flow to the blades, protects their edges from damage and localizes splash formation.

It is assumed that the proposed design will be most effective for catamarans, hovercraft skegs, vessels with a small waterline area, as well as for single-hull high-speed craft with double-skeg stern contours. Due to the exceptional simplicity of design, ease of maintenance and repair, in most cases the proposed new type of propulsion and steering system will replace the use of complex and expensive Arneson propulsion units. The high geometric accuracy of a new type of partially submerged disc propulsion device in a steering nozzle is ensured by the assembly, dimensional control and centering of all parts relative to a common axis in shop conditions before installation on a ship. And extremely accurate and fast installation on the ship is carried out by filling the gap with Chockfast self-hardening polymer composition, which forms a strong composite layer between the ship's hull and the stern tube. For ease of assembly and disassembly during repair, the proposed propulsion and steering complex has a prefabricated structure. All external parts are attached mechanically with easy access to all bolted connections through cutouts in the disk and by turning the ring fitting in one direction and the other.

The device of the proposed new type of partially submerged disk propulsion in the steering guide nozzle is clearly shown in figures No. 1-6.

The principal design of a partially submerged disk multi-blade propulsion device and a steering device in the form of a rotary guide nozzle is clearly shown in the longitudinal section of figure 1. The main elements of the proposed propulsion and steering complex are a rotating disk (24) made of stainless alloy or bronze, connected by a hub (23) and a keyed connection (22) with a propeller shaft (11) and fixed on it with a nut (20) and its lock (21). The propeller shaft rotates in rolling bearings (7) in a tubular stock (10), which rotates in the sliding parts of the stern tube (9) installed in the hull stern tube (8) and bonded to it with Chockfast polymer compound (13). The stern tube is fixed in the above-water part of the transom of the aft niche (6). The gap between the radius part of the skeg (14) and the rim of the disc is smoothed by installing the spoiler (16) using the fastener (17). On the flanged part of the stock, a tiller (5) is fastened with bolts (15), connected by a bolted connection (4) to the upper steering part of the nozzle (3) and through it to the lower part of the nozzle (18). Numerous blades (26) are located on the disc rim (25). The entire propulsion and steering complex is compactly placed forward of the ship's hull transom (1) in the aft niche (2). To exclude leakage from the stern tube into the water of lubricants, aft seal of the propeller shaft (19) and aft seal of the stock (12) are installed. Separate parts of the device are clearly shown in view A of figure 2, section B-B in figure 3 and section B-B in figure 4. Functional transformations of the propulsor by turning the steering nozzle to control the vessel along the course are shown in figures 5 and 6.

The presented images of figures 1-6 show the general idea of the proposed partially submerged disk multi-blade propulsion and steering device in the form of a rotary guide nozzle, their feature and technical novelty, but without detailed detailing of all structural components.

The proposed device, with its exceptional simplicity of design, ensures that all of the above initial requirements are met, and an analysis of the possibility of its production and practical use gives the following obvious operational advantages compared to complex and expensive Arneson propulsion units:

- simple and technological design for mass production;

- minimum material consumption and weight;

- ease of ensuring the impermeability of the above-water seals of the stern tube device;

- minimum level of vibration and noise;

- minimum pulsation of hydrodynamic forces due to a large number of blades;

- localization of spray formation by the steering nozzle during high-speed movement;

- the ability to swim safely at shallow depths;

- accessibility to mechanical connections for assembly or disassembly during repair;

- safety for the inhabitants of the aquatic environment;

- the ability to use on many types of ships;

- use of standard equipment and existing technologies in production;

- high export potential of the proposed new type of propulsion and steering complex due to high technical characteristics, reliability, maintainability, lower cost, as well as the complete absence of foreign analogues.

Another important advantage of the proposed new type of propulsion and steering gear is that it does not protrude beyond the dimensions of the aft part of the ship's hull and is reliably protected from damage during mooring operations and accidental bulks.

Given the uniqueness of the new type of propulsion, it is proposed to give it a name: "Partially submerged disk propulsion in the steering guide nozzle."

After the development of documentation for a new type of propulsion unit, carrying out model tests, manufacturing prototypes with different sizes, shapes and sections of blades, selecting materials and manufacturing technology for the main parts and assemblies, as well as conducting hydrodynamic and life tests, new applications will be finalized and submitted with a potential Investor for international patents.

Claims (1)

Partially submerged disk propulsion device in a steering guide nozzle, which is a design of a device for a propulsion and steering complex of high-speed vessels, consisting of a disk, the hub of which is fixed on a propeller shaft, which rotates in a tubular stock in one of the directions, providing forward or reverse motion of the vessel , the stock itself, which rotates in the stern tube of a typical stern tube device located in the surface part of the aft skeg of the ship, while the bottom rounding of the skeg repeats the outer radius of the disk rim, and the blades located on the rim extend beyond the dimensions of the skeg into the oncoming flow and are protected by the lower half ring guide nozzle, and the upper wide semi-ring of the rudder guide nozzle is connected by means of a tiller with a tubular stock, and when it is turned in one direction or another, its bent edge enters the oncoming flow from one of the sides, creates a lateral force, performs the function of a rudder and localizes splash formation, when this is m to protect the propeller from contact with the ground, the steering nozzle does not go beyond the draft dimensions of the vessel, characterized in that the rotation of the propeller shaft and the rotation of the stock of the propulsion and steering complex is carried out around a common axis.

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