CN203230520U

CN203230520U - Multi-blade water turbine

Info

Publication number: CN203230520U
Application number: CN2013202043426U
Authority: CN
Inventors: 林东; 黄长征; 陈正瀚
Original assignee: HANGZHOU LINHUANGDING NEW ENERGY TECHNOLOGY Co Ltd
Current assignee: Hangzhou LHD Institute of New Energy LLC
Priority date: 2013-04-22
Filing date: 2013-04-22
Publication date: 2013-10-09
Anticipated expiration: 2023-04-22

Abstract

A multi-blade water turbine comprises at least two annular turbine discs, a central shaft, spokes and multiple blades. The central shaft is disposed at the center of the annular turbine discs. The axis direction of the central shaft is perpendicular to the radial direction of each annular turbine disc. The spokes arranged along the radial direction of each annular turbine disc are disposed between the central shaft and each annular turbine disc. 17-27 blades are disposed on the annular turbine discs in a surrounded manner. Under a certain working condition, efficiency of the water turbine is in direct proportion to the number of the blades, and increasing of blade number can increase work efficiency greatly. Use data shows that efficiency of a power generating set using the water turbine is 1.4-1.5 times of that of the traditional vertical shaft power generating set. Self-buoyancy of a hollow spindle is utilized to reduce frictional force between the water turbine and a bearing, and work efficiency is increased effectively. The multi-blade water turbine suitable for reciprocating water flows has a self-starting function under various flow speed.

Description

The multiple-blade water turbine

Technical field

The utility model relates to a kind of multiple-blade water turbine.

Background technique

The trend water turbine of prior art has mainly been used for reference the technology of wind energy power, and be divided into two types: a class is that the impeller of horizontal axis water turbine is three blades or two blades, generally do not have huge air guide sleeve, but efficient is generally low; One class is to use for reference the wind power generation impeller of vertical shaft, the number of blade of this turbine impeller is three to five blades substantially, the turbine impeller that more than ten blade also arranged, basically be a traditional double click type impeller, efficient is higher a little than three blade hydraulic turbine impellers of horizontal axis, but will add huge air guide sleeve.

Energy worsening shortages now, greenhouse effect are serious day by day, and the energy day by day must low carbonization, so wind energy, ocean energy clean energy resourcies such as (comprising tidal energy, trend energy, wave energy, ocean current energy) is the developing direction of future source of energy.But the power generating equipment of these clean energy resourcies now, except the Wind Power Utilization comparative maturity, the utilization of ocean energy also all is in the starting stage, does not have general and ripe equipment, and equipment can not be changed on a large scale, and inefficiency does not still reach the level that is entirely satisfactory.

The model utility content

The utility model provides a kind of high efficiency multiple-blade water turbine at the deficiencies in the prior art.

For achieving the above object, the utility model can be taked following technical proposals: a kind of multiple-blade water turbine comprises at least two annular wheel discs, central shaft, spoke and a plurality of blade; Central shaft is arranged at the center of described annular wheel disc, and the axial direction of described central shaft is perpendicular to the radial direction of described annular wheel disc; Spoke is arranged between annular wheel disc and the central shaft, and described spoke is along the radial direction setting of annular wheel disc; A plurality of blades are around being located on the annular wheel disc; Blade quantity is the 17-27 sheet; Described blade is arc, the summation of all blade arc length be annular wheel disc external diameter circumference 0.85-2 doubly between, the line segment angle of blade mid point to two end points constitutes leaf angle, described leaf angle is between the 100-170 degree; The maximum chord length line of blade is blade angle with the angle of the annular wheel disc radius of crossing the outer end points of blade, and described blade angle is between the 10-35 degree.

As preferably, described central shaft is hollow shaft.

As preferably, described water turbine also comprises two cover plates, and described two cover plates are arranged at described two annular wheel discs respectively back to a side of described blade.

The beneficial effects of the utility model are: under certain operating mode, and the relation that the efficient of impeller water turbine and the quantity of blade are directly proportional, blade quantity increases greatly increases work efficiency.Utility data shows that the electricity generating device efficient that adopts this impeller water turbine is 1.4-1.5 times of traditional vertical shaft electricity generating device efficient; Utilize hollow spindle self buoyancy in addition, reduced the frictional force of impeller water turbine and bearing, effectively improved working efficiency; Be fit to reciprocal current, and have the self-startup ability under the various flow velocitys.

Description of drawings

Fig. 1 is impeller water turbine plan view of the present utility model.

Fig. 2 is impeller water turbine plan view of the present utility model.

Fig. 3 is leaf angle structural representation of the present utility model.

Fig. 4 is blade angle structural representation of the present utility model.

Embodiment

In order to make those skilled in the art person better understand the utility model scheme, below in conjunction with the accompanying drawing among the utility model embodiment, technological scheme among the utility model embodiment is carried out clear, complete description, obviously, described embodiment only is a part of embodiment of the present utility model, rather than whole embodiments.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment who obtains under the creative work prerequisite, all should belong to the scope of the utility model protection.

Mode of execution of the present utility model is described with reference to the accompanying drawings.A kind of water turbine comprises central shaft 1 and annular wheel disc 2, central shaft 1 is installed on the center of annular wheel disc, the axial direction of central shaft is equipped with spoke 3 perpendicular to the radial direction of described annular wheel disc between annular wheel disc 2 and the central shaft 1, and spoke 3 is along the radial direction setting of annular wheel disc; A plurality of blades 4, be fixedly installed on the annular wheel disc, blade and central axes, if the blade of water turbine is longer, according to actual needs can be along axial uniform a plurality of annular wheel discs 3 of hollow shaft, be surrounded with a plurality of blades 4 between the annular wheel disc 3, namely be linked to be an integral body be divided into short a plurality of annular wheel discs 3 that pass through than linear leaf, can increase fastness like this; Blade quantity is the 17-27 sheet, the preferred amount of blade can be 18, blade is arc, the summation of all blade arc length be annular wheel disc external diameter circumference 0.85-2 doubly between, leaf angle A is the angle (as shown in Figure 3) that the line segment of blade mid point to two end points constitutes, described leaf angle A is more than or equal to 100, smaller or equal to 170 degree, blade angle B angle is the angle (as shown in Figure 4) between the string of a musical instrument of blade and the annular wheel disc external diameter of crossing the outer end points of blade, wherein blade angle is more than or equal to 10 degree, smaller or equal to 35 degree.

Under certain operating mode, the relation that the efficient of impeller water turbine and the quantity of blade are directly proportional is raised the efficiency greatly.Utility data shows that the electricity generating device efficient that adopts this impeller water turbine is 1.4-1.5 times of traditional vertical shaft electricity generating device efficient; Utilize hollow spindle self buoyancy in addition, reduced the frictional force of impeller water turbine and bearing, effectively improved working efficiency; Be fit to reciprocal current, and have the self-startup ability under the various flow velocitys.

In present embodiment, water turbine comprises that also 5, two cover plates 5 of two cover plates are arranged at two annular wheel discs 2 respectively back to a side of blade 4.As shown in Figure 1, cover plate 5 lays respectively at the top and the below that is positioned at following annular wheel disc 2 of top annular wheel disc 2.By cover plate 5 is set, can prevents effectively that current from being entered by the space of above and below from central shaft 1 and annular wheel disc 2, thereby ensure the working efficiency of water turbine.

Claims

1. the multiple-blade water turbine is characterized in that, comprising:

At least two annular wheel discs;

Central shaft is arranged at the center of described annular wheel disc, and the axial direction of described central shaft is perpendicular to the radial direction of described annular wheel disc;

Spoke is arranged between annular wheel disc and the central shaft, and described spoke is along the radial direction setting of annular wheel disc;

A plurality of blades are around being located on the annular wheel disc; Blade quantity is the 17-27 sheet; Described blade is arc, the summation of all blade arc length be annular wheel disc external diameter circumference 0.85-2 doubly between, the line segment angle of blade mid point to two end points constitutes leaf angle, described leaf angle is between the 100-170 degree; The maximum chord length line of blade is blade angle with the angle of the annular wheel disc radius of crossing the outer end points of blade, and described blade angle is between the 10-35 degree.

2. multiple-blade water turbine according to claim 1, it is characterized in that: described central shaft is hollow shaft.

3. multiple-blade water turbine according to claim 1, it is characterized in that: also comprise two cover plates, described two cover plates are arranged at described two annular wheel discs respectively back to a side of described blade.