CN203035433U

CN203035433U - Vertical shaft lift type water turbine

Info

Publication number: CN203035433U
Application number: CN2013200007675U
Authority: CN
Inventors: 赵振宙; 黄娟; 叶芬; 原红红; 郑源; 赵振宁
Original assignee: Hohai University HHU
Current assignee: Hohai University HHU
Priority date: 2013-01-05
Filing date: 2013-01-05
Publication date: 2013-07-03
Anticipated expiration: 2023-01-05

Abstract

The utility model discloses a vertical shaft lift type water turbine which comprises an impeller shaft and an impeller arranged on the impeller shaft and composed of more than two lift type blades. The lift type blades are fixed at two ends of the impeller shaft through an end cover, the impeller is arranged in a speed increasing type flow channel, a flow guide cover and an annular flow guide net are further arranged in the flow channel, the flow guide cover is located at an upstream section of the impeller, the annular flow guide net is located on the periphery of the impeller, and a water outlet is arranged at a downstream section of the impeller. Compared with the prior art, the vertical shaft lift type water turbine is high in efficiency and suitable for low water head hydroelectric generation and tidal current energy generation.

Description

A kind of vertical shaft lift type water turbine

Technical field

The utility model relates to a kind of water turbine, belongs to the technology and equipment field of novel energy by ocean current or undershot wheel machine.

Background technique

At present, most of water turbine is to utilize the pressure of high head to do work, and this water turbine is when the high water level drop, and efficient is higher.But slightly above the river course of head, if the water turbine that utilizes traditional depended on pressure to do work transforms energy, efficient is lower, and is economical relatively poor for low water head even.

The water turbine of horizontal axis and the water turbine of vertical shaft lift type are also arranged in the energy by ocean current utilization, and these water turbine cut both ways, for the horizontal axis water turbine, horizontal axis water wheels wheel adopts the lift-type blade, and rotating speed is very fast, and capacity usage ratio is higher, the technology comparative maturity, thereby be widely used.But there is the driftage loss in the horizontal axis water turbine, and this causes practical efficiency and theoretical efficiency to depart from bigger problem can for the water turbine of actual motion.Though and adopt traditional lifting upright shaft water turbine not have the adaptive problem of direction, the characteristics that twice in its blade is inhaled merit make its exist, the scarce capacity that does work for the first time, the ability of acting for the second time again extremely a little less than, and then the more weak problem of whole acting ability.Therefore be necessary to propose a kind of direction adaptability problem that neither exists, the new type hydraulic turbine that efficient is high.

Summary of the invention

Technical problem to be solved in the utility model is the efficient for raising low water head river course or the conversion of energy by ocean current energy, and a kind of novel water turbine that provides.

For solving the problems of the technologies described above, the technical solution adopted in the utility model is as follows: a kind of vertical shaft lift type water turbine, comprise by impeller shaft and be arranged on two impellers that above lift-type blade is formed on the described impeller shaft, described impeller shaft two ends by end cap with the lift-type vanes fixed on impeller shaft, described impeller is arranged in the runner of an acceleration type, in runner, also be provided with air guide sleeve and annular water conservancy diversion net, described air guide sleeve is positioned at the Upstream section of described impeller, described annular water conservancy diversion net be positioned at described impeller around, be provided with water outlet at described impeller tract.

Described annular water conservancy diversion net inner mesh face is vertical with the impeller rotational circle.For guiding impeller flow direction all around consistent with the normal direction of the vertical rotational circle of impeller.

Described impeller one end end cap has blade adjusting device outward.Can change the propeller pitch angle of lift-type blade by sizing mixing.

Described runner has drainage, even makes the whole fluid in impeller upstream have acceleration.

Described air guide sleeve has the current that will enter before the impeller and evenly distributes around impeller.

Compared with prior art, the beneficial effect of this novel practical is:

1, impeller has been inherited the high efficiency advantage of horizontal axis impeller, has also inherited the adaptive advantage of lift vertical shaft impeller to direction.

2, novel impeller has taken full advantage of the acting ability of lift force blade, has improved the acting ability of vertical shaft impeller greatly, by twice poor efficiency acting, has become once efficiently acting.

3, novel impeller has the oar of change function, compares with traditional vertical shaft impeller, utilizes the change oar can start, efficiently move and carry out the hydrokinetics brake preferably.

Description of drawings

Fig. 1 is the utility model new type hydraulic turbine top cross-sectional view.

Fig. 2 is the front elevational schematic of the utility model water turbine.

Fig. 3 is three kinds of change oar view of stator.

Wherein: 1, impeller shaft; 2, lift-type blade; 3, end cap; 4, runner; 5, air guide sleeve; 6, shell, 7, annular water conservancy diversion net; 8, outlet pipe; 9, the device of sizing mixing, 10, the guide vane elongation line, 11, water intake end, 12, waterexit end, 13, the blade speed change state, 14, the blade rated condition, 15, the blade outage state.

Embodiment

Below in conjunction with accompanying drawing, the utility model is elaborated.As shown in Figure 1, the utility model water turbine comprises impeller shaft 1, at impeller shaft 1 lift-type blade 2 more than 2 is installed, and described impeller shaft 1 and lift-type blade 2 are undertaken in succession by the end cap 3 at two ends, constitutes the impeller of a rotation; Impeller is installed in the runner 4 of speedup, and runner 4 fluid flow directions are vertical with impeller shaft 1; Runner 4 is guided the free-pouring water in the external world into impeller under the condition of not slowing down; Air guide sleeve 5 leads impeller upper waters stream, and then avoids fluid directly to enter impeller; Under shell 6 and air guide sleeve 5 actings in conjunction, current are evenly distributed on around the impeller; Under the effect of annular water conservancy diversion net 7, the current around being evenly distributed on enter impeller with the direction along impeller rotational circle normal direction; The current of finishing merit flow out by described outlet pipe, as shown in Figure 2.

The utility model lift-type blade pass is crossed an axle and is fixed on the end cap 3, and comes the angle of swing of each lift-type blade 2 of synchronization control by controlling device 9.Wherein, the lift-type blade, when shutting down, it is consistent with the elongation line of guide vane waterexit end (normal direction of rotational circle) that the lift-type blade is adjusted to the string of a musical instrument of blade, is feather position; When starting, this lift-type blade lean one angle, the direction rotation that the lift-type blade tilts along round end; After the lift-type blade was pneumatic, the lift-type blade rotated to the string of a musical instrument position vertical with the elongation line (normal direction of rotational circle) of guide vane waterexit end; When needs slowed down, the lift-type blade was again to the rotation of feather position direction, referring to Fig. 3.The impeller of the utility model water turbine has efficient efficiently, is applicable in low-head hydraulic generating and the trend energy water turbine.

Claims

1. vertical shaft lift type water turbine, comprise by impeller shaft and be arranged on two impellers that above lift-type blade is formed on the described impeller shaft, described impeller shaft two ends by end cap with the lift-type vanes fixed on impeller shaft, described impeller is arranged in the runner of an acceleration type, in runner, also be provided with air guide sleeve and annular water conservancy diversion net, described air guide sleeve is positioned at the Upstream section of described impeller, described annular water conservancy diversion net be positioned at described impeller around, be provided with water outlet at described impeller tract.

2. vertical shaft lift type water turbine according to claim 1, it is characterized in that: described annular water conservancy diversion net inner mesh face is vertical with the impeller rotational circle.

3. vertical shaft lift type water turbine according to claim 1, it is characterized in that: described impeller one end end cap has blade adjusting device outward.