CN1102237A

CN1102237A - Movable blade rotating wheel

Info

Publication number: CN1102237A
Application number: CN93119523A
Authority: CN
Inventors: 严伯春
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-10-23
Filing date: 1993-10-23
Publication date: 1995-05-03

Abstract

The present invention provides a new fluid mechanism-rotary wheel with turnable vanes. Said mechanism consists of rotating shaft, framework, vanes, and revolute pair. The framework is fixed on the rotating shaft, and the vanes are installed on the framework by using revolute pair, and a proper limit switch is placed on the rotary wheel so as to make the vanes swing only round the axis of the revolute pair within a certain range. Said rotary wheel with turnable vanes uses the difference in effective stress area when the vanes of two sides of rotating shaft are impulsed by equidirectional fluid and the difference in their recieved pressures to form torque. Said rotary wheel with turnable vanes can be fully placed in the fluid, and can convert the kinetic energy of the fluid into torque.

Description

Movable blade rotating wheel

Movable blade rotating wheel of the present invention relates to a kind of improved fluid machinery member, is applicable to be arranged in the fluid to convert fluid dynamic energy to torque.

Seawer tide is a huge power source, how morning and evening tides is changed into electric energy? suppose to utilize the stator blade runner, the stator blade runner can only be installed on the horizontal plane position, allows seawater promote the partial blade of runner and produces torque.And if the kinetic energy of seawater depths is still obtained with the stator blade runner, the radial length of its blade will long enough, and the intensity of blade just is a problem.If utilize aial flow impeller, its efficient is lower.

The objective of the invention is to provide a kind of improved fluid machinery member.It can all be arranged in the fluid fluid dynamic energy that back and forth flows is converted to torque.

The objective of the invention is to reach: at first will make impeller produce torque, just must make the vane stress difference of impeller shaft both sides with following principle, mode.Because the vane stress direction is limited by the flow direction of fluid, can not consider.And blade bears the size that effective lifting surface area of fluid impact directly has influence on vane stress, and effective lifting surface area of blade equals the blade geometry area and takes advantage of sine (or cosine of obtuse angle angle) in fluid motion direction and blade plane acute angle angle.Because the geometrical shape of the blade on the impeller should be similar, so do not consider the variation of blade geometry area.And change blade plane and fluid motion angular separation just can have influence on the size that blade bears fluid thrust.So, stator blade is changed into moving vane in order to make the vane stress difference of rotating shaft both sides.Promptly utilize blade one end revolute pair to be connected on the impeller framework, and suitable limit stoper is set on runner.When the moving vane of impeller one side was subjected to fluid impact, blade was around the swing of revolute pair axle center, and the acute angle angle of main plane of blade and fluid motion direction diminishes.The effective lifting surface area of blade diminishes, and bears pressure and diminishes.Though the moving vane of the opposite side of rotating shaft correspondence also is subjected to same fluid impact, owing to be subjected to the effect of runner upper limit device, the angle of blade plane and fluid motion direction can not further change after changing to position, eye position.It is the bigger position of the effective lifting surface area of blade that this spacing position now is set, and then the vane stress of movable blade rotating wheel rotating shaft both sides is different, and movable blade rotating wheel has produced moment of rotation.

Movable blade rotating wheel can obtain obvious torque in being similar to the uniform medium of directional flow, fixedly impeller then is difficult to obtain obvious torque in being similar to the uniform medium of directional flow.Movable blade rotating wheel can all be arranged in the fluid obtaining the kinetic energy of fluid, and fixedly impeller its blade strength of kinetic energy and the construction cost that will obtain the fluid depths all can be had any problem.Though and axial flow fixedly impeller be arranged at and also can produce torque in the uniform medium of approximate directional flow, aial flow impeller more is applicable to the torque that produces high rotating speed, little moment, and movable blade rotating wheel is applicable to the torque that produces the slow-speed of revolution, big moment.Fixedly impeller is when flow direction reverses, and its sense of rotation also can change thereupon.And movable blade rotating wheel is when flow direction reverses, and torque direction still can remain unchanged.Because the These characteristics of movable blade rotating wheel, it is applicable to and is arranged in the sea, the energy of flow of seawer tide is converted to torque.Utilize mechanical transmission to drive the electricity generating device generating again.

The invention will be further described below with reference to accompanying drawing.

Fig. 1 is the axial view part of a kind of concrete structure of movable blade rotating wheel of the present invention.

Fig. 2 is the side view part of Fig. 1.

With reference to Fig. 1, Fig. 2, movable blade rotating wheel is by runner (3), skeleton (2), and blade (1), revolute pair (4) is formed, and skeleton (2) is fixed in the rotating shaft (3).Blade (1) utilizes revolute pair (4) to be connected on the skeleton (2).Limit blade is set directly at skeleton (2) around the limit stoper of revolute pair (4) axis swing scope among Fig. 1, Fig. 2.Blade (1) position of Fig. 1, Fig. 2 shaft (3) upside is the less position of effective lifting surface area, and rotating shaft (3) downside blade (1) position is the big position of effective lifting surface area.Movable blade rotating wheel is to utilize it when fluid impact, the swing position difference of the blade of different azimuth (1), and effective lifting surface area difference, the surge pressure of bearing is different and form torque difference, makes movable blade rotating wheel produce torque, promptly fluid dynamic energy is converted to torque.Movable blade rotating wheel in being similar to the uniform medium of directional flow every blade (1) always from the less position of effective lifting surface area to the big position of effective lifting surface area, change along with the rotation of movable blade rotating wheel to the less position of effective lifting surface area again.And the less position of blade (1) effective lifting surface area of living in is always metastable with the position that effectively lifting surface area is bigger.Therefore movable blade rotating wheel can produce lasting torque under the effect of fluid.In being similar to uniform fluid, if flow direction has produced reverse, then position that the residing effective lifting surface area of movable blade rotating wheel upper blade (1) is bigger and the effectively less also change thereupon of position of lifting surface area.Originally the bigger position of the residing effective lifting surface area of blade (1) becomes the less position of effective lifting surface area, and the less position of the residing effective lifting surface area of former blade (1) becomes the bigger position of effective lifting surface area.So movable blade rotating wheel still can form a torque, and torque direction is identical with former direction.Only under the situation in the spacing orientation that changes blade (1), the torque direction of movable blade rotating wheel just can change.

Claims

1, hydraulic mechanism of being made up of rotating shaft (3), skeleton (2), blade (1) is characterized in that:

A, blade (1) utilize revolute pair (4) to be installed on the skeleton.

B, runner are provided with limit stoper.

2, hydraulic mechanism according to claim 1 is characterized in that: this mechanism is arranged in the fluid can convert fluid dynamic energy to torque.

3, hydraulic mechanism according to claim 1 is characterized in that: this mechanism is when flow direction changes, and the torque direction that it produced can remain unchanged.

4, hydraulic mechanism according to claim 1 is characterized in that: blade (1) can be around revolute pair (4) axis swing.

5, hydraulic mechanism according to claim 1 is characterized in that: the hunting range of blade (1) is limited by limit stoper.

6, hydraulic mechanism according to claim 5 is characterized in that: blade (1) has big effectively lifting surface area position and less effective lifting surface area position in the limit stoper limited field.

7, according to claim 5 or 6 described hydraulic mechanism, it is characterized in that: the oscillator arc of blade (1) in the limit stoper limited field is 80 °～90 ° or 170 °～180 °.