DE3120609A1 - Bow-propeller marine propulsion - Google Patents

Abstract

The bow propeller for marine propulsion is characterised in that the bow propeller pulls the ship, separates water in front of the ship (resistance 1), forces it astern via a passage duct and fills a vacuum developing there and builds up a thrust jet. Ship stabilisation through horizontal water column instead of by ballast tanks. Passage duct from the bow to the stern discharge nozzle with 2 vertical rudders and 2 horizontal rudders. Disposed perpendicularly on both sides of the nozzle and lying transversely at the top and bottom end of the discharge nozzle. <IMAGE>

Description

Title: Bow propeller ship propulsion

Application: bow propeller ship propulsion via throughput channel on the rear outlet nozzle with two side and one above and one below Rudder blade, especially for seagoing merchant and war ships.

Purpose: In the case of ship propulsion, it is necessary behind the stern of the Ship to generate an overpressure of water, beyond which a stern directed Water jet pushes the ship forward.

Prior Art: It is known to meet these needs use one or more stern propellers. It must depend on the angle of attack of the propeller blades turn so high that the aft water jet develops such high thrust, that the ship is moving.

Sources: Hamburger Abendblatt dated February 21/22, 1981 Köhler's fleet calendar 1981, page 213 Ing. Ernst de Jong Review: Water standing in front of the bow is resistance 1.

There is resistance from sucking water on the sides of the ship and the ship's bottom 2.

The water used to build up the stern jet is initially between The propeller and rear fuselage are removed, creating a vacuum at the stern that the Overcoming the resistance 1 at the bow rationally counteracts.

The propeller blades pull when the engine speed is increased significantly additional water around the stern, which only creates the stern jet so that the steel pressure overcomes the resistance 1 (bow) and 2 (sides and bottom) allows.

The propulsion of the hull in turn leaves negative pressure at the stern caused by waves from the bow under the ship and past the side must be balanced aft.

Task: The invention is based on the task of the resistance 1 (bow) and to avoid a vacuum at the stern that on the Bow dismantled to push water through the throughput channel directly behind the ship and thus to build up the stern jet for the advance.

Solution: The bow propeller in the front opening of the throughput channel stands.

In the passage there is a horizontal column of water up to the outlet opening at the stern.

With the first turn of the bow propeller, depending on the angle of attack cut off a certain amount of water from the propeller leaves, which was immediately applied to the Water column in the throughput channel acts. Since water cannot be compressed, it sets the resulting pressure continues in the throughput channel, so that the corresponding amount of water exits aft and creates overpressure behind the fuselage.

The overpressure at the stern pushes the ship into the vacuum that passes through further propeller tours are generated in front of the bow. The degraded water pushes through the throughput channel and builds up a pressurized water jet at the stern, etc.

Further configuration: At the aft outlet nozzle are at all four sides, so also above and below, elevator and rudder attached. These hold the ship at, position "Mitsehiffs" the ship straight ahead, at position "Baekbord" they direct the beam to port, thereby pushing the stern to starboard and the ship lies on port tack. With elevator position corresponding.

A swiveling rug propeller and rear outlet nozzle are conceivable, but appear to be too complex in terms of construction because of the large crookedness in the port mostly maneuver with the help of a tractor. (.Spring) Achievable advantages: The bow propeller If the ship pulls in the direction of travel, builds the water resistance that arises in front of the ship 1, pushes it aft through the throughput channel, initially building overpressure there on, fills otherwise resulting vacuum, creates a thrust jet, useful when maneuvering.

Since the propeller turns are so much more effective, you can reduce them significantly and thus save fuel.

Description of several exemplary embodiments: Planning is carried out for new buildings the throughput channel instead of the otherwise necessary ballast tanks (round or square), there the horizontal water column provides the necessary stability even for the empty ship.

In the case of existing units, the already existing double floor Serve as a throughput channel if the aft outlet is slightly raised to the outlet nozzle is shaped.

B) The shaft that carries the power of the silver bevel gears to the machine Forward propeller hub transmits, can rotate freely in the throughput channel or in a streamlined one Casing.

C) Tugs with controllable pitch propellers must go for the march and high angle of attack of the wings to narrow the aft exit, for towing the exit should be increased with a low angle of incidence.

D) For warships, when using multiple bow propellers, the Throughput channel have the appropriate cross-section, with the option of only the middle of turning to be driven by machine power, while the other two only turn through the propeller blade climb. ' - L e r s e i t e

Claims (1)

P A T E N T A N .S P R o C H E Generic term: bow propeller for ship propulsion Characteristic part: The bow propeller for ship propulsion is characterized by that the bow propeller pulls the ship, removes water in front of the ship (resistance 1), pushes aft via a throughput channel and fills the vacuum that is created there and thrust jet builds up. Subclaim: ship stabilization by lying water column instead of ballast tanks. Characteristic part of the dependent claim: throughput channel from ship's bow to the rear outlet nozzle with 2 rudders and 2 elevators. Standing vertically on both sides of the nozzle and lying across the top and lower end of the outlet nozzle.