CN201330678Y

CN201330678Y - Multilevel energy-saving hydraulic turbine

Info

Publication number: CN201330678Y
Application number: CNU2008200093468U
Authority: CN
Inventors: 梁思武
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-04-05
Filing date: 2008-04-05
Publication date: 2009-10-21
Anticipated expiration: 2018-04-05

Abstract

An axial-flow type multilevel energy-saving hydraulic turbine is characterized in that a plurality of rotating impellers are connected in series with the same rotating shaft inside the housing of the hydraulic turbine, and an immovable rectifying impeller for connecting the housing of the hydraulic turbine and supporting the rotating shaft is arranged in front of each rotating impeller. The water power transformation efficiency of the hydraulic turbine can be greatly improved through three major ways, including fixing the rectifying impellers to control the impact direction of water stream, adopting the multilevel rotating impellers to recover the hydroenergy, and fully utilizing the suction force of a water head of a tail pipe. Particularly, the multilevel energy-saving hydraulic turbine can maintain the operation stability of the hydraulic turbine better under a condition that the water head and the load are changed, thereby improving the average efficiency of the hydraulic turbine. The technical principle of the utility model can further be applied to the manufacture of multilevel energy-saving steam engines and other fluidic power machinery.

Description

The multi-stage, energy-saving water turbine

Technical field:

The utility model relates to a kind of axial flow hydraulic turbine of multi-stage impeller.

Background technique:

Present known water turbine all is the single-stage blade wheel structure basically, and operation stability is relatively poor under the condition that head and load change, and especially the transformation efficiency of water turbine is just had a greatly reduced quality under low load condition.Generally all about 80%, remaining energy all follows flowing water to waste together to the average efficiency that water can transform, and also has bigger development space aspect the average efficiency improving.In current this rapid economic development, the energy is at full stretch and environmental protection pressure has reached capacity epoch, energy saving has become global eager desire by fair means or foul.

As shown in Figure 2, existing water turbine can not realize that the main cause of multilevel hierarchy is: impact current (12) and just changed original direction significantly through first order impellers (9) back and rotate in water turbine and advance, can not do work to rotary blade (10) and (11) of back effectively.If the progression that continues the increase impeller also can reduce the energy conversion efficiency of water turbine, for example: multi-stage hollow water turbine, application number: 02230813.X.

Summary of the invention:

The purpose of this utility model is to provide a kind of axial flow hydraulic turbine of multi-stage impeller, this water turbine can guarantee to impact current by behind the first order impeller, still can the impellers at different levels of back effectively be done work, thereby overcome the energy loss that existing water turbine single-stage impeller causes, reach the purpose of energy saving.

The purpose of this utility model is achieved in that according to pressure formula P=F/S and gets F=PS, when the pressure one of water regularly, want to make water turbine to obtain bigger power, a wherein most important approach is exactly the lifting surface area that increases water turbine.And the best approach of increase lifting surface area: be exactly the progression that increases rotary blade.Therefore, the technological scheme that is adopted is: a kind of multi-stage, energy-saving water turbine, a plurality of rotary blades of having contacted successively on the same rotatingshaft in the water wheels casing is characterized in that: a fixing rectification impeller is set in the front of each rotary blade connects the water wheels casing and support rotatingshaft.

As shown in Figure 3, when impact current (16) rotate flinging first rotary blade (13) and promoting it, it also just changes direction thereupon and is rotating and rush at next fixedly impeller (14), fixedly each blade on the impeller (14) all can be corrected and the water (flow) direction of combing by it, makes its direction that is provided with according to blade impact next rotary blade (15).And the like go round and begin again, the axial flow hydraulic turbine of a multi-stage impeller has normally been moved.

In the axial flow hydraulic turbine of this multi-stage impeller, the fixedly rectification impeller that just is arranged on each rotary blade front that plays a crucial role.Because its setting, let us can reasonably change and control the water impact direction in the water turbine, just let us can reasonably change and control the direction of active force in the water turbine.We just can be by the stator blade setting like this, and as shown in Figure 1, fixedly the direction of straightener(stator) blade on the impeller and rotatingshaft be arranged in parallel, allows those power of not doing work with the impeller rotation originally change direction and impacts the rotary blade acting; Simultaneously we come the lateral impact rotary blade at the power that also can change those forward impact impellers, and as shown in Figure 3, fixedly straightener(stator) blade on the impeller and the blade reversed dip on rotary blade setting allows it do useful work more and flog a dead horse less.

Existing axial flow hydraulic turbine is in order to make full use of the water energy, and it is bigger that the tilt angle of rotation blade generally all is provided with.The water turbine of this multi-stage impeller is because the blade quantity of recycle-water energy is a lot, so just can suitably reduce the tilt angle of blade when the design rotary blade.The tilt angle that reduces rotation blade mainly contains the benefit of following two aspects: the one, and the axial pressure that can reduce rotary blade flogs a dead horse less; The 2nd, can reduce the fixedly tilt angle of straightener(stator) blade of water impact, reduce the bend energy loss of water turbine inside.

As shown in Figure 1, this water turbine is the very little even tubular structure of a kind of degree of crook, and the water (flow) direction in the whole service process changes little, so the energy of process bend loss just seldom.Therefore, it not only can effectively utilize the hydraulic head pressure above the water turbine, also can effectively utilize simultaneously the attraction force of tail pipe head below the water turbine, thereby reach the purpose that makes full use of omnidistance head.

In sum, the axial flow hydraulic turbine of this multi-stage impeller mainly reaches energy-conservation purpose by following three approach: the one, and become the single-stage impeller and be multi-stage impeller, repeatedly reuse the water energy; The 2nd, by the direction that changes the water impact rotary blade that is obliquely installed of fixing straightener(stator) blade, thereby reduce the axial pressure of rotary blade and increase horizontal rotary thrust; The 3rd, effectively utilized that the attraction force of tail pipe head reduces energy loss below the water turbine.Realized the energy conservation object of water turbine fully by these three approach, estimated that this water turbine compares with existing water turbine, approximately can improve water can transformation efficiency about 10%.Because the impeller progression of this water turbine is many, so it just can keep the stability of hydraulic turbine operation, thereby improve the average efficiency of water turbine significantly under the condition that head and load change better.Use know-why of the present invention, can also make energy-saving steam machine and other Hydrodynamic machine tool of multi-stage impeller.

Description of drawings:

The utility model below will describe in detail by accompanying drawing (embodiment):

Fig. 1, be structural representation of the present utility model;

Fig. 2, be a kind of invalid effect structural representation of multistage rotary blade;

Fig. 3, be to have added the fixedly useful effect structural representation of rectification impeller.

In the schematic representation: 1.3.5. rotary blade, 2.4. be the rectification impeller fixedly, 6. water wheels casing, and 7. rotatingshaft, 8. generator, the 9.10.11.13.15. rotary blade, 14. fixing rectification impellers, 12.16. impacts the streamline of water.

Embodiment:

In the embodiment shown in Figure 1, rotary blade (1), (3), (5) are connected on the same rotatingshaft (7) successively, in the front of rotary blade (3) and (5) fixedly rectification impeller (2) and (4) are set respectively, are used for connecting water wheels casing (6) and support simple multi-stage, energy-saving water turbine of rotatingshaft (7) formation.

Claims

1. multi-stage, energy-saving water turbine, a plurality of rotary blades of having contacted successively on the same rotatingshaft in the water wheels casing is characterized in that: a fixing rectification impeller is set in the front of each rotary blade connects the water wheels casing and support rotatingshaft.

2. water turbine according to claim 1 is characterized in that the straightener(stator) blade on the fixing impeller and the direction of rotatingshaft be arranged in parallel.

3. according to claim 1 or 2 described water turbine, it is characterized in that straightener(stator) blade on the fixing impeller and the blade reversed dip setting on the rotary blade.