CN106864716A - New pod propulsion electric propulsion device - Google Patents

Abstract

The invention discloses a novel pod-type electric thruster, which adopts an asymmetrical NACA airfoil to replace the traditional B4-70 propeller airfoil, and realizes the improvement of hydrodynamic performance such as thrust and torque of the thruster. Symmetrical NACA airfoil propeller, pod and rudder are composed of three parts. Through the connection of the rudder, the pod is suspended at the bottom of the stern, and a motor is placed in the pod, and the NACA airfoil propeller on the pod is driven by the motor. The propeller of the invention can save cabin space, reduce the vibration of the main engine, increase the propulsion efficiency and improve the maneuverability of the ship.

Description

New podded electric propulsion

technical field

The invention relates to a novel pod type electric thruster, which adopts NACA airfoil to replace the traditional B4-70 propeller.

Background technique

As early as 100 years ago, people began to use electric motors to drive propellers to rotate, but electric motor propulsion has been subject to the constraints of existing technical conditions for a long time. Gear transmission, AC motor speed control technology, maintenance, etc. The propulsion power of the propulsion system. In the 1980s, with the rapid development of electric control technology and motor frequency modulation technology, ships have begun to use electric power as the propulsion system, among which pod propulsion is a successful application of electric propulsion, and has now become the mainstay of ship electric propulsion systems. important propulsion device. The pod-type electric propulsion system saves the available space of the hull, reduces noise and vibration, increases propulsion efficiency, and improves the maneuverability of the ship. Therefore, the electric propulsion system has great advantages. On commercial ships and military ships, The pod-type electric propulsion has extremely high application value.

Contents of the invention

The purpose of the present invention is to provide a novel pod-type electric propulsion unit, which adopts the NACA airfoil with a crown height of a=0.8 and a thickness of NACA66 to replace the traditional B4-70 propeller airfoil, thereby improving the traditional pod-type electric propulsion. device performance.

The novel pod type electric propulsion device of the present invention is mainly composed of three parts: an asymmetrical NACA airfoil propeller, a pod and a rudder. The pod adopts an axisymmetric pod, and the rudder adopts a NACA symmetrical airfoil rudder, that is, an airfoil whose upper and lower arcs are symmetrical. The propeller adopts NACA66 airfoil and the crown height is a=0.8, and the propulsion efficiency is the highest under this parameter. The propeller is arranged at the end of the pod; through the connection of the rudder, the pod is suspended at the bottom of the stern, and a motor is placed in the pod, which drives the propeller at the end of the pod (either the front end or the rear end). The main idea innovation of adopting this structure design is: through the rudder connection, the pod equipped with NACA66 airfoil propeller and electric motor is suspended at the bottom of the stern, and the pod can rotate 360°, which saves the propeller shaft system used traditionally , combining the propulsion device with the rudder as a whole.

The beneficial effects of the present invention are that the thrust, torque and other performances of the NACA66 airfoil pod electric propulsion are improved compared with the traditional B4-70 propeller and common pod electric propulsion, and the arch height is a=0.8 NACA66 airfoil pod electric propulsion has the highest propulsion efficiency. This new propeller can save space, facilitate the optimized layout of the whole ship, improve the comprehensive navigation performance of the ship, have a high degree of modularization, and facilitate installation and maintenance. Handling performance.

Description of drawings

Figure 1 is a schematic diagram of the curved surface of the NACA airfoil blade;

Figure 2 is a schematic diagram of the rotation of the new podded electric propulsion unit.

In the figure 1. Rudder, 2. NACA66 airfoil propeller, 3. Pod.

detailed description

With reference to Fig. 1, 2, this propeller of pod type electric power of the present invention is made up of propeller of NACA airfoil, pod and rudder three parts; The curved surface of the blade is shown in Figure 1, and the propeller is arranged at the end of the pod. The pod is connected through the above-mentioned rudder and suspended at the bottom of the stern. A motor is arranged in the pod, and the motor drives the above-mentioned propeller. As shown in Figure 2, the propeller in this example is composed of three parts: an asymmetrical NACA airfoil propeller, an axisymmetric pod and a symmetrical NACA airfoil rudder, and the NACA66 airfoil with arch height a=0.8 is used to replace the traditional The B4-70 propeller airfoil has realized the improvement of hydrodynamic performance such as propeller thrust and torque, and the pod can realize 360° rotation, and at the same time saves the cabin space, which can reduce the vibration of the main engine, increase the propulsion efficiency, and improve the ship's performance. Handling performance.

Claims (3)

1. a kind of new pod propulsion electric propulsion device, it is characterised in that the propeller is by the propeller of NACA aerofoil profiles, gondola and rudder Three parts constitute；Described propeller uses NACA66 aerofoil profiles and sagitta face is a=0.8, and propeller is arranged at gondola end, institute The gondola stated is connected by above-mentioned rudder, hangs on and motor, the above-mentioned propeller of motor-driven are set in ship stern bottom, gondola.

2. new pod propulsion electric propulsion device according to claim 1, it is characterised in that described gondola uses axial symmetry Type gondola.

3. new pod propulsion electric propulsion device according to claim 1, it is characterised in that described rudder is symmetrical using NACA Aerofoil profile rudder.