CN2069030U

CN2069030U - Water turbine with adjustable blades

Info

Publication number: CN2069030U
Application number: CN90202565U
Authority: CN
Inventors: 余新河
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-03-06
Filing date: 1990-03-06
Publication date: 1991-01-09

Abstract

The utility model discloses a water turbine with changeable blade fins and without a high water head and river damming, and is a driving device which is installed in an ordinary river and is used as a generator. The utility model utilizes the upper and the lower symmetric blade fins to generate force and then to drive vane wheels to do work. The utility model is characterized in that the sizes of the acting surfaces of the blade fins and a water flow are changeable.

Description

Water turbine with adjustable blades

The utility model relates to a kind of hydroelectric Wing-changing water turbine that is used for, and this water turbine can be installed in and carry out work in the common river.

Main driving arrangement in the present hydroelectric power plant in the world is a water turbine, and its action principle is the energy that the water of interception in reservoir or river is become driving device, utilizes this energy to drive power generating equipment.

Hydroelectric power is important in the world energy source, is worth the waterpower resourses of exploitation to have 38 * 10 according to estimates economically ⁵MW, the waterpower of having developed already at present approximately has only 37 * 10 ⁴MW promptly accounts for 10, and 90 percent water can not be utilized as yet in addition.The water in Africa and Asia can be laid in basically not development and use still.The reason that produces this situation mainly is to build reservoir to need a large amount of man power and materials, and investment is expensive.Because, no matter be the kaplan type turbine of Greco-Roman Style, or modern age general various impulse turbines and reaction turbine, its working principle all is to rely on the potential energy of water to be transformed into the energy of flow to impact impeller, drives the water turbine work done.Do not have head, water turbine just can not be worked, even the perfusion type water turbine, general also the requirement has the head more than a meter to work.Fairly obvious, water can should be used for changing into electric energy, must select the bigger place of the height of water, perhaps barrage is built reservoir.This is not only costly, accounts for the field and takes up an area of, and brings difficulty to national economy and the people's livelihood, and might destroy the ecological balance, brings out earthquake, and the time one is of a specified duration, and reservoir can crumble one day, will bring the consequence that is difficult to predict.

Task of the present utility model is to seek a kind of water turbine of new structure, and it does not need construction of reservoir maybe needn't seek to build the big part of the height of water, and it can be worked in general river, builds all disadvantages that reservoir was brought to reach to eliminate.

The basis that proposes this model utility task is that the water-head of reservoir dam is the integral result (exactly being the integration of certain section potential energy) of a certain section river discharge.Exist the micro component of amount of flow conversely speaking, on the each point in river, if all load onto a kind of workable water turbine at the river each point, make it generating connection guiding principle, this is equivalent to omnidistance potential energy integration, and its result is equivalent to set up the generated energy of reservoir.

The present technique solution is, immerses the water turbine in the current, is subjected to bourn acting force different and cause power poor with respect to two fins of wheel shaft on its impeller, produces moment and makes the impeller revolution.

Technical solution must solve two concrete technical problems, and the one, it is poor with respect to the two fins generation power of wheel shaft how to make; The 2nd, how to make impeller keep rotation motion continuously.

The former solution distinguish method be the fin that makes wheel shaft top with the acting surface of current greater than the fin of wheel shaft below and the acting surface of current, it is poor just to produce power at this moment; The latter's solution distinguishes that method has two schemes, the one, fin is made flexible along its length, the 2nd, but make along the center line doubling fin, the both is that the useful effect face of fin and water (flow) direction can change.Illustrating with the optimum impeller sense of rotation of the present invention, is that the state consistent with current illustrates with the moving direction that is in wheel shaft top fin just.When the fin that is in the impeller extreme higher position, its aerofoil launches to become a plane or almost plane over against water (flow) direction, and the active force of suffered water is maximum on the fin at this moment, and producing changes distance, makes wheel rotation; Along with wheel rotation, next fin is in the impeller peak again, and the commentaries on classics distance of generation is rotated further impeller, and original fin is crooked gradually under the effect of water, or two the doubling aerofoil closed gradually, go to wheel shaft below when promptly being in the impeller extreme lower position, fin is bent into maximum, or the doubling aerofoil is closed fully, this moment, fin was back to water (flow) direction, be that the wing is carried on the back over against current, this moment, the active force of suffered current was minimum, and the active force of these current is the resistance of impeller motion; When impeller continues revolution, just fin is crossed the impeller minimum point and is raise gradually, one when the suffered water active force of aerofoil during greater than the resistance of the wing back of the body, fin opens gradually, when above going to wheel shaft, being in the impeller extreme higher position, aerofoil launches to become a plane or almost plane again, is in the current maximum force state that is subjected to again.Because the summation of the suffered bourn acting force of each fin of the wheel shaft first half is greater than the suffered resistance to water-flow sum of each fin of wheel shaft Lower Half, and each fin enters working state continuously successively, makes impeller keep rotation motion continuously all the time under the moment effect.

In order to keep the fin can proper functioning, the shape of fin must can only be towards a direction bending; In order to reduce the resistance to water-flow of the wing back of the body, the level cross-sectionn shape of the wing back of the body should be a curve, and the edge of a wing is thin and thick in the middle part of the wing back of the body, and this curve it would be desirable a hyp part, for easy to process, also can make similar hyperbola or smooth curve.Fin will be considered intensity, should be by the principle design of cantilever mounted beam, and itself and impeller junction will have enough thickness.When being risen crossing the impeller minimum point, fin can launch aerofoil from bent state or closed state soon, fin should be made hollow, make fin itself buoyancy be arranged in water, fin application this moment glass fibre reinforced plastics is made, and common is to make with the glass fibre reinforced plastics of epoxy resin.Also can make with skeleton outsourcing rubber or soft water-proofing material, fin hollow inflatable.When using in the bigger river of flow velocity, also available light metal of fin even timber are made.In order to make the fin can be crooked, for the fin of variable song along its length, fin be to be formed with movable connection by two joints or the above unitary part of two joints; But for the fin along the center line doubling, fin is to be formed with movable the connection by the part of two symmetries.

For fin is risen rapidly crossing the impeller minimum point, except that the buoyancy of above-mentioned application fin itself, most preferred technological scheme is at impeller front (aspect current) device one guide plate, the one end nestles up the fin of bent state and is positioned under the impeller axis, baffle surface is double curve or smoothed curve, current are quickened,, consequently promote fin and rise causing the Bernoulli effect with place, end near fin.Another effect of this guide plate is: make current not only can not enter position under the impeller axis, (just making water under the impeller axis almost not have the flow velocity of water (flow) direction) and since the effect of guide plate quicken by the position on the impeller axis, like this with regard to the water that makes position, impeller axis upper and lower part owing to current difference produces pressure difference, consequently promote fin and rise.

Accompanying drawing of the present utility model is as follows: Fig. 1 a is the utility model Wing-changing water turbine front view;

Fig. 1 b is the utility model Wing-changing water turbine side view;

Fig. 2 is a length direction Wing-changing water turbine work schematic representation;

Fig. 3 is a length direction Wing-changing water turbine fin sectional drawing;

Fig. 4 is length direction Wing-changing water turbine fin shape of cross section figure;

Fig. 5 is a doubling formula Wing-changing water turbine work schematic representation;

Fig. 6 is a doubling formula variable sweep wing water wheels fin A-A cross-sectional.

Fig. 1 a and Fig. 1 b are depicted as the Wing-changing water turbine sketch.On water turbine housing (H), axle end can be passed through actuator drives electricity generating device (G) with Bearing Installation at wheel shaft (0) two ends, perhaps direct and sealed type generator electric; Fixing impeller (1) on the wheel shaft, four or more fin (2) is being installed on the impeller.Guide plate (3) is fixedlyed connected with housing.Whole water turbine can be suspended on the spreader that is fixed in the riverbank and soak in water, perhaps is fixed on the riverbed with support.

Fig. 2 is a length direction Wing-changing water turbine work schematic representation.Wheel shaft (0) is a fixed connection with impeller (1), and four or more fin (2) is installed on the impeller, and fin can be crooked, and whole fin is made up of two or more unitary part of link joint.Fin can only be towards the direction bending of aerofoil (e) as shown in the figure, and the direction bending that can not carry on the back (f) towards the wing, fin when diagram A point, its tortuosity maximum, when crossing the A point and being positioned at the b point, because of floating function, fin has elongation slightly.Fin is during to the guide plate terminal B, because current cause the Bernoulli effect by guide plate at B point, the fin quickening is opened.Fin is in C point position, and current act directly on the aerofoil (e), and fin opens rapidly; To d point position, fin launches to become a plane or almost plane.Fin is crossed the d point, and is crooked gradually.The A end of guide plate helps to make fin to reach maximum flexion.

Figure 3 shows that length direction Wing-changing water turbine fin sectional drawing, whole fin is made up of two or more unitary part, fin should make the sectional area maximum of its root (promptly being fixed on the part of impeller) by the design of single armed beam stress situation, dwindles to the wing tip direction gradually.Fin is a hollow, with glass fibre reinforced plastics and normally epoxy glass laminate make, also available light metal or timber are made.Each one of fin links with movable, as hinge and axle Xiao.The fin each several part can only rotate towards a direction aerofoil (e) is crooked, can not carry on the back (f) crooked rotation towards the wing, has boss (g) to limit its rotation.

Figure 4 shows that length direction Wing-changing water turbine fin diagrammatic cross-sectional view.E is an aerofoil, and section line is a straight line, and promptly aerofoil is a plane.F is the wing back of the body, is the thin smoothed curve of thick end in, and optimum scheme is a hyp part.For easily manufactured, also can be made into similar hyperbola.When water turbine very hour, corresponding fin is also less, this moment fin with solid wooden making, suitable effect is also arranged.For reducing friction, flap surface need be polished.

Fig. 5 is a doubling formula Wing-changing water turbine work schematic representation.Wheel shaft (0) is a fixed connection with impeller (1), and four or more fin (2) is installed on the impeller, and fin is divided into two symmetric parts along the center, is connect by energy to form.Fin can only be towards aerofoil (e) direction closure, and can not carry on the back (f) direction closure towards the wing.Fin is when diagram A point, and two symmetric parts are closure fully, and when crossing the A point and being positioned at the b point, because of floating function, two symmetric parts have slightly opens.Fin is during to the guide plate terminal B, because current cause the Bernoulli effect by guide plate at B point, the fin quickening is opened.Fin is in c point position, and current act directly on the aerofoil (c), and fin opens rapidly; To d point position, two symmetric part flare ups, one plane.

Fig. 6 is a doubling formula Wing-changing water turbine fin A-A cross-sectional.Fin is made up of two symmetric parts (4) and (5), and both can turn round around axis (6).On impeller shaft, be equipped with positioning work piece (7), do unnecessary revolution with restriction (4) and (5).

The utility model has been broken through the form that existing power dam adopts, and does not need barrage to build despot or construction reservoir, but all can install and use in general river.China river gathers, and uses the Wing-changing water turbine of this practical model utility, can bring huge economic effect.

Claims

1, a kind of Wing-changing water turbine is made up of wheel shaft (0), impeller (1), fin (2) and guide plate (3), it is characterized in that: the aerofoil of fin be can towards folk prescription to change, when aerofoil (e) during over against water (flow) direction, aerofoil is launched into a plane or almost plane, when the wing was carried on the back (f) over against water (flow) direction, the acting surface of fin and water was minimum; Guide plate links to each other with housing (H), and guide plate is a hyp part or approximate Double curve along the sectional shape of water (flow) direction.

2, according to the Wing-changing water turbine of claim 1, it is characterized in that described fin is to be connected by activity by two or more unitary part to form, can be towards the bending of fin length direction.

3, according to the Wing-changing water turbine of claim 1, it is characterized in that described fin is to form by being connect by link joint to two symmetric parts along sail shaft, two symmetric parts can be around axis (6) to the folding of aerofoil (e) direction.

4,, it is characterized in that being installed with on the described impeller four or more fin according to the Wing-changing water turbine of claim 1.

5,, it is characterized in that described fin is hollow according to the Wing-changing water turbine of claim 2 or 3.

6,, it is characterized in that described fin is hollow according to the Wing-changing water turbine of claim 4.

7, according to the Wing-changing water turbine of claim 1 or 2, it is characterized in that described fin shape of cross section, its aerofoil transversal is a straight line, its wing back of the body is the thin smoothed curve of thick end in.

8, according to the Wing-changing water turbine of claim 7, it is characterized in that described fin shape of cross section, its wing back of the body is a hyp part.

9, Wing-changing water turbine according to Claim 8 is characterized in that described fin shape of cross section, and its wing back of the body is a hyp part.

10, according to the Wing-changing water turbine of claim 7, it is characterized in that described fin shape of cross section, the wing back of the body is approximate Double curve or smoothed curve altogether.

11, Wing-changing water turbine according to Claim 8 is characterized in that described fin shape of cross section, and its wing back of the body is approximate Double curve or smoothed curve.

12,, it is characterized in that described fin is to make with glass fibre reinforced plastics according to the Wing-changing water turbine of claim 2 or 3.

13,, it is characterized in that described fin is to make with light metal or timber according to the Wing-changing water turbine of claim 2 or 3.

14,, it is characterized in that described guide plate is shaped as a hyp part along water flow section according to the Wing-changing water turbine of claim 1.