阅读说明：本技术 一种组合式对转桨电力推进系统 (Combined type contra-rotating propeller electric propulsion system ) 是由 郑锐聪 邱湘瑶 肖燕燕 郭望渠 于 2020-06-02 设计创作，主要内容包括：本发明涉及一种组合式对转桨电力推进系统,包括：第一电机、轴系、第一螺旋桨和轮缘式推进器。本发明提高了推进效率,将价格昂贵、选型范围受到限制的大型柴油机的功率通过电力推进系统的型式,分摊为多台小功率的发电机组,扩大了选型范围,降低了动力系统的初装成本。采用了舵桨合一的型式,提高了船舶的操纵性,特别适用于中大型的船舶应用。(The invention relates to a combined contra-rotating propeller electric propulsion system, comprising: the propeller comprises a first motor, a shaft system, a first propeller and a rim type propeller. The invention improves the propulsion efficiency, distributes the power of a large diesel engine which is expensive and has limited model selection range into a plurality of generator sets with small power by the type of an electric propulsion system, enlarges the model selection range and reduces the initial installation cost of a power system. The combined type of the steering and the oar is adopted, the maneuverability of the ship is improved, and the combined type steering and oar is particularly suitable for medium and large ships.)

1. A combined counter-rotating propeller electric propulsion system, comprising: the novel propeller shaft comprises a first motor, a shaft system, a first propeller and a rim type propeller, wherein two ends of the shaft system are respectively connected with the first motor and the first propeller, the rim type propeller is arranged behind the first propeller and is the same as the thrust direction of the first propeller, and the rotating direction of a second propeller of the rim type propeller is opposite to that of the first propeller.

2. A combined contra-rotating-paddle electric propulsion system according to claim 1, characterized in that the rim propeller comprises: casing, second motor, pipe, bearing group and second screw, wherein, the second motor set up in the casing, the both ends of casing are equipped with respectively the pipe, second motor stator is fixed in both ends on the step of pipe, second motor rotor is located both ends the below of step, bearing group set up in between step and the second motor rotor, the second screw pass through the blade tip flange with the second motor rotor links to each other.

3. The combined contra-rotating propeller electric propulsion system of claim 2, further comprising a gearbox, the gearbox being connected to the motor and the shafting, respectively.

4. A combined contra-rotating propeller electric propulsion system according to claim 2 or 3, characterized in that the rim propeller is mounted on a mounting flange of a steering shaft of a vessel steering system.

5. The combined contra-rotating propeller electric propulsion system according to claim 4, wherein the steering shaft is connected with a steering engine or a full-rotation mechanism to drive the steering shaft to steer left and right or make a full rotation of 360 degrees.

6. A combined contra-rotating propeller electric propulsion system according to claim 2 or 3, characterised in that the rim thruster is mounted at the bottom of the vessel between the first propeller and the vessel rudder system, to which rudder blades are connected.

Technical Field

The invention belongs to the technical field of ship turbine propulsion, and particularly relates to a combined contra-rotating propeller electric propulsion system.

Background

With the development of electric propulsion technology, electric propulsion systems are increasingly used on ships. The electric propulsion system is a propulsion type which is powered by a generator set or a battery, a propeller is driven by a motor, and the speed is regulated by a frequency converter or a controller, but the electric propulsion system has low electric propulsion efficiency and a complex structure. In a traditional propulsion mode, a high-power diesel engine is usually adopted to drive a large-diameter propeller through a shafting or a gear box, and a single diesel engine has overlarge power, large size, medium weight and high price and is limited in model selection range.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a combined contra-rotating propeller electric propulsion system, which improves the propulsion efficiency, distributes the power of a large diesel engine with high price and limited model selection range into a plurality of small-power generator sets in the form of the electric propulsion system, enlarges the model selection range, reduces the initial installation cost of a power system, adopts the form of combining rudder and propeller into one, improves the maneuverability of a ship, and is particularly suitable for medium-sized and large-sized ships.

In order to solve at least one of the above technical problems, the technical solution adopted by the present invention is:

a combined counter-rotating propeller electric propulsion system, comprising: the novel propeller shaft comprises a first motor, a shaft system, a first propeller and a rim type propeller, wherein two ends of the shaft system are respectively connected with the first motor and the first propeller, the rim type propeller is arranged behind the first propeller and is the same as the thrust direction of the first propeller, and the rotating direction of a second propeller of the rim type propeller is opposite to that of the first propeller.

Further, the rim pusher comprises: casing, second motor, pipe, bearing group and second screw, wherein, the second motor set up in the casing, the both ends of casing are equipped with respectively the pipe, second motor stator is fixed in both ends on the step of pipe, second motor rotor is located both ends the below of step, bearing group set up in between step and the second motor rotor, the second screw pass through the blade tip flange with the second motor rotor links to each other.

Furthermore, the device also comprises a gear box, and the gear box is respectively connected with the motor and the shafting.

Further, the rim type propeller is arranged on a mounting flange of a steering shaft of the ship steering system.

Furthermore, the steering shaft is connected with a steering engine or a full-rotation mechanism to drive the steering shaft to swing the rudder left and right or to rotate fully for 360 degrees.

Further, rim formula propeller installs in the boats and ships bottom and is located between first screw and the boats and ships rudder system, the boats and ships rudder system is connected with the rudder blade.

The beneficial effects of the invention at least comprise:

1) the propulsion efficiency is improved: firstly, a horizontal electric propulsion system and a rim type propeller are adopted to form a pair of rotating propellers, and the rear propeller absorbs the circumferential energy of the front propeller, so that the propulsion efficiency is improved;

2) the electric propulsion system is adopted to reduce the single machine power of the main machine: after the electric propulsion system is adopted, two diesel generator sets with smaller power can be adopted for replacement, the power of each prime motor can be made smaller, and a larger margin is selected and arranged; meanwhile, in operation, only one generator set can be started or two or more generator sets can be started simultaneously according to the requirements of working conditions, so that the flexibility of power distribution is improved;

3) help to reduce single-oar diameter and power: the power originally output to 1 propeller is distributed to 2 propellers, so that the load of a single propeller is reduced, and the generation of cavitation bubbles is inhibited; meanwhile, the diameter of the propeller can be made smaller, and the arrangement is more flexible;

4) the specification and the type selection limit of the power element are reduced: when a set of electric propulsion system is adopted, the required electric and electronic elements have larger specifications, such as a frequency converter, a switch, a transformer, a contactor and the like, have larger overcurrent, high technical difficulty and high price; after the same power is distributed to the two sets of electric propulsion systems, the power of a single electric propulsion system is reduced, the specification of the matched power electronic element is also reduced, and if the overcurrent of a frequency converter, a contactor, a frequency converter, a switch and the like is reduced, the range of model selection is improved, the price is also greatly reduced, and the initial charging of the whole power system is favorably reduced;

5) the maneuverability is improved: when adopting rim formula propeller as providing the steering force, rudder oar unifies, and the helm power of providing is bigger, especially in the low, the poor condition of traditional rudder effect of boats and ships business turn over port speed of a ship, adopts the propeller of rudder oar unification to provide the helm power of turning, does not receive the influence of the speed of a ship, has improved helm effect and boats and ships maneuverability by a wide margin, lets boats and ships more flexible, let the navigation safer.

Drawings

FIG. 1 is a schematic diagram of a propulsion system according to a first embodiment of the present invention.

Fig. 2 is a schematic view of the structure of the rim propeller of the present invention.

Fig. 3 is a cross-sectional view taken along line C-C of fig. 2.

Fig. 4 is a schematic left-hand rudder view of the propulsion system of the present invention.

FIG. 5 is a schematic view of the propulsion system of the present invention turning to the right rudder.

Fig. 6 is a schematic structural diagram of a propulsion system according to a second embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a propulsion system according to a third embodiment of the present invention.

Fig. 8 is a schematic structural diagram of a propulsion system according to a fourth embodiment of the present invention.

The ship comprises a ship body 1, a first motor 2, a gear box 3, a shafting 4, a first propeller 5, a rim type propeller 6, a shell 601, a second motor stator 602, a second motor rotor 603, a guide pipe 604, a bearing group 605, a second propeller 606, a blade tip flange 607, a ship rudder system 7, a mounting flange 8 and a rudder blade 9.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.