Hub connecting structure of forward propeller and rear propeller of contrarotating propeller
A connection structure and counter-rotating propeller technology, which is applied to ship propulsion, ship parts, ships, etc., can solve the problems of energy loss and insufficient consideration, and achieve the effect of avoiding energy loss and good energy saving effect
Inactive Publication Date: 2016-04-27
SHANGHAI MERCHANT SHIP DESIGN & RES INST
View PDF8 Cites 4 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] The technical problem to be solved in the present invention is: the consideration of the hub vortex loss in the existing counter-rotating propeller type is not sufficient, and the connection type of the hub and spinner cap has not been optimized, which will generate a large amount of vortex, which will cause energy loss, and cannot fully Give full play to the energy-saving effect of counter-rotating propellers
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0021] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0022] see Figure 1-Figure 3 , a hub and dome connection type suitable for contra-rotating propeller systems. This design is applied to the hub of the front propeller, the cap of the front propeller and the hub of the rear propeller, and the purpose of energy saving is achieved through the mutual cooperation between the shapes.
[0023] This structure type is mainly composed of unconventional front propeller hub size, special shape front propeller cap, and rear propeller hub shape matching the front propeller wake. Its structural relationship is as follows:
[0024] as attached Figure 1-Figure 3 As shown, the front paddle is composed of three parts 1, 2, and 4; the rear paddle is composed of two parts 5 and 6, and the rear paddle is driven by the motor M in 3; the front and rear paddles are coaxial, and 8 indicates the axis; 7 marks a sect...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a hub connecting structure of a front propeller and a rear propeller of a contrarotating propeller. The hub connecting structure comprises the front propeller and the rear propeller which are co-axially arranged, wherein the front propeller is driven by an internal combustion turbine or a motor in a ship body; the rear propeller is driven by a motor nacelle arranged at the tail of the rear propeller; the front propeller comprises front propeller blades, a front propeller hub and a front propeller fairing; the rear propeller comprises a rear propeller hub and rear propeller blades; the cross sections of the rear propeller hub, the front propeller fairing and the front propeller hub are circular; the busbar of the rear propeller hub and the front propeller fairing is a coherent sine curve segment, wherein the diameter of the rear propeller hub is larger than that of the front propeller fairing; tangent lines at the head end and the tail end of the curve segment of the sine curve segment are parallel to the axis of the propeller. When a main engine for driving the front propeller operates, the front propeller blades and the front propeller fairing are driven to rotate by the front propeller hub, the front propeller blades generate thrust, so as to push backwards to generate a rotating wake flow, the flow proximity to the front propeller hub flows to the rear propeller hub in the manner of being attached to the front propeller fairing; when an electric motor for driving the rear propeller operates, the rear propeller blades rotate to recover the rotating wake flow of the front propeller, so that energy is recovered and the incoming flow of the front propeller fairing can smoothly flow through.
Description
technical field [0001] The invention relates to a connecting structure for a front and rear propeller hub of a counter-rotating propeller, which belongs to the technical field of ship design. Background technique [0002] There are many types of counter-rotating propellers. Among them, for propellers driven independently by the front and rear propellers, the front propeller is usually driven by a gas turbine (or motor) inside the hull to drive the front propeller to rotate; the rear propeller usually adopts a pod-type electric propulsion type. From the perspective of energy-saving principles, the type of counter-rotating propeller mainly adopts the reverse rotation of the rear propeller and the front propeller, so as to recover the energy in the wake vortex of the front propeller and achieve the effect of energy saving. However, the consideration of the hub vortex loss in the existing counter-rotating propellers is not sufficient, and the connection type of the hub and cap h...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): B63H5/10
CPCB63H5/10B63H2005/103
Inventor 刘洋浩周志勇吴小平张雨新
Owner SHANGHAI MERCHANT SHIP DESIGN & RES INST