CN2291373Y

CN2291373Y - Counter-rotative type propeller front-rear mounted guide propulsive device

Info

Publication number: CN2291373Y
Application number: CN 97206542
Authority: CN
Inventors: 林家芸
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-02-14
Filing date: 1997-02-14
Publication date: 1998-09-16
Anticipated expiration: 2007-02-14

Abstract

The utility model is characterized in that ducts are respectively connected with an upper supporting post and a lower supporting post between two counter rotating type propellers. The ducts are positioned behind the front propeller and in front of the back propeller. The blade tips of a front screw propeller and a rear screw propeller respectively extends into the front end and the back end of the ducts, and a counter rotating propeller front-rear mounted duct propulsive device is formed. The length of the duct is longer than the length of common duct paddles, and thus, the pushing efficiency under heavy load is improved; the pushing efficiency of the utility model is improved by about 10%, and the strength of the underwater pushing part (cantilever structure) of the device is enhanced.

Description

Full circle swinging is to changeing oar front and rear conduit propelling unit

A kind of full circle swinging belongs to boats and ships or other waterborne vessel fields to changeing oar front and rear conduit propelling unit.

All-rotation thrust unit claims Z type propelling unit again, comprehensive (360 degree) thrust can be provided, maneuvering performance when improving marine low speed greatly, but, to compare with traditional propulsion system, the propulsion coefficient of this all-rotation thrust unit is not high, therefore, this all-rotation thrust unit, main so far craft tug and all kinds of engineering ship that only is used for the requirement high maneuverability is of limited application.

The purpose of this utility model is to design a kind of later-model full circle swinging to changeing oar front and rear conduit propelling unit, to improve the propelling of all-rotation thrust unit under various loads than rate, reaches energy-saving effect and the purpose of widening its field of application.

Scheme of the present utility model is to changeing between the oar at two, with the upper and lower pillar mozzle that is connected, this mozzle is positioned at the back of bow oar, the front of back oar, the blade tip of forward and backward screw propeller stretches into the front and back ends of mozzle respectively, form full circle swinging to changeing oar front and rear conduit propelling unit, the catheter propeller lengthening that the length of mozzle is more common is to improve the propulsion coefficient under the heavy load.

The utility model has the advantages that:

1, because conduit and last lower supporting rod organically combine, increased this device intensity of thrust part (cantilever design) under water greatly, the yardstick of lower supporting rod promptly reduces its resistance on perhaps can reducing under equal strength; To changeing oar under equal-wattage, thrust and moment of torsion are shared by two oars, and the parts on each prop shaft and the yardstick of baffle are also corresponding to be reduced, and resistance also reduces; The energy of the recyclable bow oar wake of back oar has reduced the loss of rotating energy; The conduit of lengthening also can provide bigger additional thrust, so the propulsion coefficient of fabricate block can be greatly improved; It is estimated that compare with single catheter propeller all-rotation thrust unit, propulsion coefficient will improve about 10%.

2, conduit is positioned on the axis of revolution, and than single catheter propeller of being partial to axis of revolution, moment of gyration reduces greatly, thereby has reduced revolution power, has further saved the energy, and structural strength is also very favourable.

3, less than single screw, the front and rear conduit between two oars is also little than the conduit diameter that is enclosed within outside the single-blade, so the maximum gauge of body capable of being combined than the little 15%-20% of single tube oar, does not increase and turn round requisite space to the optimum diameter that changes oar; So can strengthen the gap of propelling unit and hull, thereby help disturbance force, reduce noise and vibration to hull.

The utility model has following accompanying drawing, and accompanying drawing is made brief description.

Accompanying drawing 1 is that full circle swinging is to changeing oar front and rear conduit propelling unit structure structure scheme drawing.

Below in conjunction with accompanying drawing architectural feature of the present utility model is elaborated.

See also accompanying drawing 1, the dynamical axis 1 among the figure drives vertical axises 2 by last bevel gear set 11 and rotates, the about bevel gear set 7 in lower end with the rotation of vertical axis become front propeller 6 and after screw 10 to changeing, the promotion boats and ships advance.

Rotary motive power drives rudder cover 4 and rotates together with upper supporting column 5 through worm gear pole pair 3, and screw propeller is also realized forming comprehensive thrust around vertical axis 360 degree revolutions thereupon, makes boats and ships have the ability of omnidirectional maneuver.

Has dynamical axis 1 among the figure, last bevel gear set 11, vertical axis 2, worm gear pole pair 3, come about and overlap 4, upper supporting column 5, following bevel gear set 7, the finishing bevel gear cuter that is fixed on the vertical axis lower end drives two counterrotating finishing bevel gear cuters simultaneously, the horizontal shaft 8 that is connected with these two finishing bevel gear cuters, 9 place the vertical axis both sides respectively, axle head is respectively adorned a front propeller 6 and after screw 10, these parts constitute full circle swinging to rotating oar propulsive unit, and main points of the present invention are: at two to changeing oar 6, between 10, with last, lower supporting

rod

5,13 mozzles 12 that are connected, the catheter propeller lengthening that the length of this mozzle 12 is more common, and be positioned at the back of bow oar, the front of back oar, before, the blade tip of after screw stretches into the front and back end of mozzle (12) respectively, forms changeing oar front and rear conduit propelling unit.

Among the figure 14 is baffles.

Claims

1. a full circle swinging is to changeing oar front and rear conduit propelling unit, has dynamical axis (1), last bevel gear set (11), vertical axis (2), worm gear pole pair (3), the cover (4) of coming about, upper supporting column (5), following bevel gear set (7), the finishing bevel gear cuter that is fixed on the vertical axis lower end drives two counterrotating finishing bevel gear cuters simultaneously, the horizontal shaft (8) that is connected with these two finishing bevel gear cuters, (9) place the vertical axis both sides respectively, axle head is respectively adorned a front propeller (6) and after screw (10), form full circle swinging to rotating oar propulsive unit, it is characterized in that: at two to changeing oar (6), (10) between, with last, lower supporting rod (5), (13) mozzle (12) that is connected, the catheter propeller lengthening that the length of this mozzle (12) is more common, and be positioned at the back of bow oar, the front of back oar, before, the blade tip of after screw stretches into the front and back end of mozzle (12) respectively, forms changeing oar front and rear conduit propelling unit.