CN2134351Y

CN2134351Y - Swimming-shrimp type shallow ship propeller

Info

Publication number: CN2134351Y
Application number: CN 92225053
Authority: CN
Inventors: 程根清
Original assignee: DALIAN MARINE TRANSPORT COLLEGE
Current assignee: DALIAN MARINE TRANSPORT COLLEGE
Priority date: 1992-06-17
Filing date: 1992-06-17
Publication date: 1993-05-26
Anticipated expiration: 2002-06-17

Abstract

The utility model relates to a ship propeller, more concretely, a ship propeller for the shallow draft waterway. In the utility model, the host machine drives a spindle by a drive reversing mechanism; supporting disks or supporting spokes are fixed in the vertical direction of the spindle; vanes which are parallel to the spindle are arranged on the corresponding shaft of each pair of supporting disks. Because the paddling vanes of the utility model and the water surface are always vertical in the course of movement, the hydraulic efficiency is high, and the propulsive efficiency can reach more than 0.7. The utility model can be used in the shallow draft rapid waterway of more than 0.35 meters.

Description

Swimming-shrimp type shallow ship propeller

The utility model relates to marine propulsion.Relate to the marine propulsion of shallow draft waterway or rather.

The shallow draft ship propelling unit has three kinds at present, i.e. screw propeller, waterjet propulsion and paddle wheel.Wherein the shallow water propulsion coefficient value of screw propeller is about 0.3; Though waterjet propulsion efficient is than screw propeller high (about about 0.5), because it is to realize by the suction water of pump, so be easy to cause water pump to damage or obstruction in the foreign material drawing pumps such as rubble, silt particle the river bed; Although it is and the propulsion coefficient of paddle wheel can reach 0.6, very heavy.Above-mentioned three kinds of propelling units because efficient is low, so influence the raising of ship speed, particularly when the depth of water below 0.45 meter the time, efficient is lower, thereby inapplicable.

The purpose of this utility model provides a kind of deficiency that is intended to overcome existing shallow draft ship propelling unit, and guarantees that the depth of water is at the marine propulsion that still can keep efficient operation more than 0.35 meter.

The technical solution of the utility model is achieved in that on the main shaft 4 that is driven by transmission direction reverser 10 by main frame, according to certain fixed interval 1 to 2 pair of dish or spoke 8 vertical with main shaft is installed, on the circumference of an every pair dish or a suitable radius of spoke, 4-10 bearing 3 is set equably, on cooresponding bearing between an every pair dish or a spoke, lay the blade 2 of parallel main axis, for making each blade in motion process, be in plumbness with horizontal surface all the time, on the end 1 of each blade one end, be connected with corresponding bearing on an auxiliary dish or the spoke 7 by the pivot pin on the connecting rod 56 respectively, form parallel four-bar linkage.

For reducing the loss of blade tip vortex, increase circulation simultaneously, at said blade two ends and therebetween, be equipped with spoiler 9.

Good effect of the present utility model:

Since blade in motion process all the time perpendicular to horizontal surface, so the hydraulic efficiency height, propulsion coefficient can reach more than 0.7.

2. because blade has only the hull longitudinal thrust in motion process,, eliminated the diffusing ripple of the stern that causes by propelling unit basically, helped reducing the erosion of wave embankment so course stability is good.

3. the main shaft owing to this propelling unit is positioned on the horizontal surface, so the installation, maintenance of parts such as blade and convenient disassembly.

4. because the increase of the blade area of marine propulsion provided by the utility model can be along extending transversely, so logical the going up of shallow water torrent boat that adapts to more than 0.35 meter used.

Do progressive explanation below in conjunction with accompanying drawing:

Fig. 1 is that structure of the present utility model is always schemed.

Fig. 2 is the front view of the utility model embodiment.

Fig. 3 is the birds-eye view of the utility model embodiment.

Among Fig. 3 12 is marine main engines, drives swimming-shrimp type marine propulsion main shaft 4 by transmission direction reverser 10.In the both sides of main shaft, fixedly mount two pairs dishes 8 symmetrically, 6 bearing 3(are set as shown in Figure 1 on each dish).Prop up on the inboard corresponding bearing of dish every couple of master, 6 blades 2 of striking are installed.For improving the propulsion coefficient and the speed of marine propulsion, blade should remain the state vertical with horizontal surface in the process of striking.To fulfill this requirement, stretch out at each blade one end on the end ［ 1 ］ of main dish, (as shown in Figure 1), be connected with corresponding bearing on auxiliary the dish 7 by the pivot pin on the connecting rod 56.Connecting rod is vertical with blade face to be installed.By main and auxiliary dish, make connecting rod form parallel four-bar linkage.In order to reduce the loss of blade tip vortex, increase the blade ring flow simultaneously, in the two ends and the centre of blade 3 spoilers are housed.

The marine propulsion that Fig. 2 has provided the new shape of this practicality to be provided is installed in the location status on the hull.Axis system and auxiliary propping up are coiled the afterbody that is installed in ship, the front of rudder 11, and the height that main shaft is installed is positioned at above water.The height on blade base is positioned at more than the boats and ships baseline ［ BL ］.

Claims

1, a kind of shallow draft ship propelling unit, it comprises the main shaft [4] that drives blade rotation, it is characterized in that according to certain fixed interval 1 to 2 couple of perpendicular master being installed on said main shaft props up a dish or a spoke [8], prop up every couple of master on the circumference of dish or the suitable radius of spoke 4 to 10 bearings [3] are set equably, said blade [2] is parallel to main shaft and is placed between an every pair dish or a spoke on the cooresponding bearing, for making blade in motion process, be in plumbness with horizontal surface all the time, end [1] at each blade, be connected with auxiliary corresponding bearing that coils or prop up on the spoke [7] by the pivot pin [6] on the connecting rod [5] respectively, form parallel four-bar linkage.

2, according to the described shallow draft ship propelling unit of claim 1, it is characterized in that at the two ends of said blade and be equipped with the increase circulation therebetween, reduce the spoiler ［ 9 ］ of tip eddy loss.