CN2518774Y

CN2518774Y - Centrifugal propeller

Info

Publication number: CN2518774Y
Application number: CN01257470.8U
Authority: CN
Inventors: 易明均
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-12-06
Filing date: 2001-12-06
Publication date: 2002-10-30
Anticipated expiration: 2011-12-06

Abstract

The utility model relates to a centrifugal propeller and belongs to the thrusting and operating device of the ships which takes the round water, the adverse effect as the medium. The utility model comprises a pump which comprises a main axis, an impeller and a shell with an axis direction water inlet and a radial water outlet and a water outlet which is opposite connected with the water inlet; the water inlet is connected with the water inlet box in the reverse direction of the water outlet; the utility model thrust by the same direction adverse effect between the pump and the water inlet and has an efficiency as high as ninety percent.

Description

Centrifugal propellor

Technical field

It is that medium is propelling and the steering gear technical field of principle of reaction as boats and ships with spraying with water on every side that the utility model belongs to a kind of.

Background technology

The first-elected screw propeller of traditional marine propeller that generally uses, during propeller work, its main shaft, blade seat and support produce certain resistance in water, and the centnifugal force of its generation (the centnifugal force size is directly proportional with the size at blade screw angle) can't be converted into thrust.During screw propeller work, main leaning on from root of blade position high strength work done far away, root of blade and end linear velocity differ greatly, even cause between the root blade clearance to produce and reflux and form resistance, thereby make that for all the foregoing reasons traditional propeller work efficiency is on the low side, approximately have only about 80%.

The utility model content

The technical problems to be solved in the utility model provides a kind of high efficiency centrifugal propellor.

The utility model is to realize like this, referring to Fig. 1～2, a kind of centrifugal propellor, it has main shaft (5), coaxial line is socketed in the impeller (3) on the main shaft (5) and has the axial water inlet (6) and the shell (2) of water outlet (1) radially, wherein main shaft (5) by bearing arrangement on the axial cooresponding shell of water inlet (6) (2) housing, in addition, it also has one with radially water sucking mouth (9) and the axially suction box (8) of water outlet (7), the caliber size coupling of the caliber size of the water outlet (7) of described suction box (8) and the water inlet (6) of above-mentioned shell (2), the housing of the casing of suction box (8) and shell (2) is by axial stacked connection of bolt (4), the discharge port (1) that the water outlet (7) that makes suction box (8) and water inlet (6) coaxial line tube of shell (2) lead to the water sucking mouth (9) that connects and make suction box (8) and shell (2) each other opening towards opposite.The tube core line of the discharge port (1) of above-mentioned shell (2) is footpath, the corresponding cross section line overlap of main shaft (5) with the wheel shaft of above-mentioned impeller (3).Thus the of the present utility model this centrifugal propellor of Gou Chenging because as above-mentionedly except that having conventional leaf wheel pump water-bound, also have an additional suction box, the discharge port opening of the water sucking mouth of this suction box and impeller housing is towards opposite, when centrifugal impeller is worked, it sucks water under the control of propelling unit housing identical with the antagonistic force direction that discharge water is produced, and makes a concerted effort thereby constitute a kind of promotion.According to Newton's third law, suction and thrust that this moment, water sucking mouth and discharge port produced respectively have much, meanwhile pulling force of Chan Shenging and reaction thrust just have much, in addition, the design's centrifugal propellor does not have the bearing arrangement of underwater operation, if it can be rotated with regard to alternative traditional steering wheel structure in the certain angle scope, also prolong because of designs simplification service life.If do 180 ° of rotatable adjustment when it is installed, can make it then to realize that advance and retreat do not turn around, if install propelling unit additional in ship both sides correspondence simultaneously, then be particularly useful for requirement and make the rapid-action ship of war.Simultaneously again because the corresponding surface of the discharge port tube core line of the shell of above-mentioned the design's centrifugal propellor and impeller wheel shaft footpath line overlap, be that discharge port is located at a radially side of housing, its whole front view be state's font (also can be the convex shape shown in Fig. 4～6) shown in Figure 2 but not thereby b font conventional housings makes the design's the work efficiency of centrifugal propellor significantly improve, reach more than 90%.The affirmation of the efficient of the design's centrifugal propellor is according to as follows: the linear diagram of mechanics during referring to traditional water pump work shown in Figure 3.Impeller rotate a circle the medium of being discharged farthest to just can reach first row's arrow locations around 360 ° of peripheral distances of impeller place pump housing inner chamber, the linear diagram of mechanics when its application force angle summation of paying is 64980 ° of Fig. 6 for this pump working, the medium transport of being discharged that rotates a circle its impeller arrives when arranging arrow locations together, and the application force angle summation of being paid only is 8190 °

Attached: the data computation formula

1°+2°+3°…+360°＝64980°

(1°+2°+3°…+90°×2＝8190°

Both contrasts, latter the design's when finishing same amount impeller paying at double in the pump housing reduced, according to bernoulli equation, the design compares in the same unit time with the former can also increase the medium transport amount, otherwise, can not keep constant pressure in the pump chamber, throw away from the impeller tangential direction according to traditional water pump design water, can in pump chamber, form the rotary water current consistent, dead point A is set for preventing the current infinite loop with the impeller operation direction.Referring to Fig. 3 and Fig. 6, its flow direction of medium and the impeller operation direction that break away from impeller do not have positive connection, curve among the figure is the oppressive formation that is subjected to shell, the direction of liquid motion only depends on escape orifice is in what position, during impeller work, equivalent work done towards periphery simultaneously, equivalent is discharged medium, in the pump housing,, there is not the pressure transmission that produces circumferential direction no matter how inner wall shape certainly leads to balance pressure.Can think in view of the above merit that impeller does for simultaneously towards directions of rays transmission or dissipation, Fig. 4 and Fig. 5 move to position with the impeller central lines according to this reason with water outlet, the mechanics linear analysis figure that places pump housing middle part to be drawn dead point A.Can infer according to Pascal's theorem and equilibrium of forces principle; The medium that impeller is discharged will inevitably be invisible dead point with the middle part of pump chamber also, and the medium of the right and left is with opposite each other direction, equal pressure, respectively converges to enter discharge conduit (referring to Fig. 6) in the same direction behind the semicircle cavity.

In addition among the mechanics linear analysis figure, no matter straight line and curve, all constitute antagonistic force to impeller, its cathetus is active loss, curve is a reactive loss.This zone between first row's arrow shown in Figure 6 and the second series arrow, compare with the same area shown in Figure 3, do not exceed the water pipe linear extent, and the work done of impeller upper semi-circle institute is shown in Figure 3 too late with the work done of regional impeller institute in this zone shown in Figure 6, although this zone shown in Figure 6 still has partly curve, shortened the part straight line with shown in Figure 3 comparing.Both payments, this zone shown in Figure 6 can all be considered as straight line, and then the ratio of the curve loss of the design's curve loss and traditional water pump is: 8190: 64980=0.126: 1.Physical data shows the efficient average out to 65% of traditional water pump.If the mechanical operation loss is 5%.Then remaining 30% all is the curve loss, and the efficient of this sample design centrifugal propellor is that 65+30-30 * 0.126=91.22 is 91.22%.

Description of drawings

Accompanying drawing is the structural representation of a specific embodiment of the utility model centrifugal propellor, wherein

Fig. 1 is the centrifugal propellor structural representation;

Fig. 2 is the birds-eye view of centrifugal propellor shown in Figure 1;

Fig. 3 is the linear scheme drawing of the current mechanics of traditional water pump;

Fig. 4～6 are the linear scheme drawing of water pump current mechanics partly of centrifugal propellor of the present utility model;

In above Fig. 1～6,1-discharge port wherein, 2-shell, 3-impeller, 4-bolt, 5-main shaft, 6-water inlet, 7-water outlet, 8-suction box, 9-water sucking mouth, 10-dead point A.

The specific embodiment

With reference to Fig. 1-2, of the present utility model should have a cast iron impeller (3) and the big or small flat arc steel casing (2) that mates with the size of described impeller (3) of its inner chamber of being with coaxial line water inlet (6) by the example centrifugal propellor, and the corresponding side of shell (2) circular arc is the radially discharge port (1) of rectangle.Interior impeller (3) wheel shaft of the tube core line that makes this discharge port (1) and above-mentioned shell (2) is the footpath line overlap in the corresponding cross section of main shaft (5).

Shell (2) has coaxial line water inlet (6), corresponding water inlet (6), the steel rectangle suction box (8) of a size and above-mentioned shell (2) size coupling is stacked affixed with shell (2) by bolt (4), the one side that this suction box (8) connects shell (2) has the water outlet (7) that mates with water inlet (6) caliber size of above-mentioned shell (2), makes this water outlet (7) logical with the corresponding pipe of water inlet (6) coaxial line of above-mentioned shell (2).This suction box (8) is water sucking mouth (a 9) rectangular aperture towards the other end of shell (2) discharge port (1) one end.The wheel shaft of above-mentioned impeller (3) is the be coupling output shaft of external electrical motor of main shaft (5) outer end.The centrifugal propellor of the present utility model of Gou Chenging is tried out through advanced development and is proved to be respond well thus, significantly improves through its propulsion coefficient on probation, and repeatedly on probation all the demonstration reaches 90%, and amplification 10～20% is subjected to trying out the unit favorable comment.

Claims

1, a kind of centrifugal propellor, it is characterized in that, it has main shaft (5), coaxial line is socketed in the impeller (3) on the main shaft (5) and has the axial water inlet (6) and the shell (2) of water outlet (1) radially, wherein main shaft (5) by bearing arrangement on the axial cooresponding shell of water inlet (6) (2) housing, it also has one with radially water sucking mouth (9) and the axially suction box (8) of water outlet (7), the caliber size coupling of the caliber size of the water outlet (7) of described suction box (8) and the water inlet (6) of above-mentioned shell (2), the housing of the casing of suction box (8) and shell (2) is by axial stacked connection of bolt (4), the discharge port (1) that the water outlet (7) that makes suction box (8) and water inlet (6) coaxial line tube of shell (2) lead to the water sucking mouth (9) that connects and make suction box (8) and shell (2) each other opening towards opposite, in addition, the tube core line of the discharge port (1) of above-mentioned shell (2) is footpath, the corresponding cross section line overlap of main shaft (5) with the wheel shaft of above-mentioned impeller (3).