CN2435538Y

CN2435538Y - Rotary propeller turbine rotating wheel

Info

Publication number: CN2435538Y
Application number: CN99215352U
Authority: CN
Inventors: 肖冠英; 肖元龙
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-07-05
Filing date: 1999-07-05
Publication date: 2001-06-20
Anticipated expiration: 2009-07-05

Abstract

The utility model relates to the technical field of shaft (penetrated) flow type turbine applied on rural power stations. The old fixed propeller type turbine has defects that the high-efficiency area is narrow, the flow quantity deviates the rating, the efficiency is greatly reduced and can not generate electricity when the flow quantity is down to moiety; but the rotary propeller turbine is not the case. One rotary propeller type rotary wheel can adapt to the reduction of the efficiency caused by the significant variation of abundance and poorness of the flow quantity by replacing one rotary propeller type rotary wheel on the existing fixed propeller type turbine. The utility model has the technical proposal that a worm wheel speed reducer is arranged on a wheel hub; a loose piece which is arranged on the center of the wheel hub is actuated to carry out up and down displacements by using screw drive on a worm wheel shaft; a rotation angle is tracked by clamping propeller blades, so as to reach the aim of capable of adapting to the variation of abundance and poorness of the flow quantity, thereby, more generation of the electric energy.

Description

A kind of Kaplan turbine runner

The utility model relates to the structural type in low-head hydroelectric plant axial flow or tubular turbine field, particularly this rotary wheel of water turbine.

The runner of axle (passing through) flow water turbine resembles the screw propeller of steamer, is held in wheel hub by 3～5 blades and constitutes on every side, and two kinds of the oar of deciding formula and rotary propeller types are arranged.The former blade corner Φ fix its blade often with wheel hub block cast together, simple in structure, China unit 500KW uses fixed blade propeller turbine in following power station, low water head rural area more; Latter's blade corner Φ is adjustable to be turned down greatly, and only because of complex structure, the power station, rural area is used seldom.

The purpose of this utility model provides a kind of Kaplan turbine runner.It is on existing fixed blade propeller turbine, does not change other structures, and only changing an adjustable new runner of blade corner Φ simple in structure just becomes axle (passing through) circulation propeller type water turbine.

A kind of Kaplan turbine runner, its technological scheme are that the runner of axial flow or through-flow fixed blade propeller turbine is drawn off, and changing this feathering vane runner promptly becomes Kaplan turbine.This new runner has the cydariform wheel hub, and last and spindle flange is spirally connected, and connects draft cone under it.Bore the hole identical with number of blade around its cydariform hub, every propeller shank dribbling is lacked part, include in the hole, it is characterized in that: the wheel hub inwall is embedded with the cake of band cam pin, and the formation pivoted arm puts together on inside and outside the hole with bolt and blade, but can turn round.And cavity is arranged between spindle flange and the wheel hub plane, disposed worm gear reducer therebetween.Allow worm gear be positioned in the chamber, worm-wheel shaft is the band screw rod down, does power screw with the center screw of a polygonal loose piece.The loose piece peripheral groove allows on each cake cam pin (pivoted arm) put lasso in groove and includes in each gutter groove, has so just formed the multicrank connecting rod means.Worm screw one end cover upper handle on retarder, during forward and reverse rotation, drive under the worm-wheel shaft slowly forward and backward of screw rod, then loose piece upper and lower displacement, thereby clamping the pivoted arm lasso in the groove of loose piece periphery in groove, follow collaborative up and down and left and right sides slippage, the pivoted arm of cake band cam pin is to order about the outer many blades of wheel hub with step greatly or turn the blade corner down.

Advantage of the present utility model: the one, almost motionless fixed blade propeller turbine structure, only changing a runner promptly becomes the adjustable Kaplan turbine of blade corner Φ, accomplishes to adapt to the purpose of the multiple electricity of rich, withered changes in flow rate; The 2nd, simple in structure, make the loose piece displacement by worm drive worm-wheel shaft screw rod, can work in coordination with tracking by many blades of clamping corner; The 3rd, easy to operate, crank from insert between the stator of opening that to entangle worm screw shaft extension forward and backward be tracking the blade corner large and small.

Fig. 1 and Fig. 2 are the structure sectional views of the utility model feathering vane runner; Its head and hydraulic turbine main shaft axle head be with flange coupling, interior tool worm speed reducer, and with many pivoted arm slippages on screw rod and the polygon loose piece groove of loose piece interlock clamping, tracking the outer blade corner of hub follow variation.

Show from Fig. 1 and Fig. 2 structure: runner hub (1) head of feathering vane runner has the main shaft lower end half-coupling of boss and tool tongue and groove and former fixed blade propeller turbine to be spirally connected.Circular cavity is arranged in the boss, interior dress worm gear (2) worm screw (3) retarder, its worm-wheel shaft lower end band trapezoidal screw (6) screws in the polygonal loose piece (7) of center tool female thread, and the number of the limit of this loose piece and blade (8) is together, promptly 3 blades are equilateral triangle, and 4 blades are square.Its half of fluting of each limit of loose piece, cam pin (10) on the pivoted arm (9) cover is included in the groove with the lasso (12) of interior round foreign side, the dribbling of blade (8) root lacks, pivoted arm (9) on the polygonal internal chamber wall hole of it and cydariform runner hub is with the inside and outside obvolvent of hexagon socket head cap screw (11), but with the ball hub for movingly.Along with the displacement of loose piece, lasso slippage in polygon groove on the clamping pivoted arm pin forces its corner of blade with increase and decrease, reaches the rich withered flow maintenance high efficiency generating effect that adapts to.

Claims

A kind of Kaplan turbine runner is characterized in that: be to carry a worm gear reducer in the runner hub of this runner own, the power screw of one section screw rod and loose piece center screw make pivoted arm guide circle slippage in groove of packing in the groove on the polygonal loose piece limit behind worm-wheel shaft, form crank-connecting rod effect clamping multi-disc blade in company with the tracking corner with every blade pivoted arm; When the stator of water turbine is outwarded winding, operator is enclosed within the worm screw forward and backward on runner hub top with handle, can make worm-wheel shaft through power screw, makes loose piece displacement tracking blade corner; And its thin bilge construction to be runner hub (1) upper cavity be equipped with worm screw (3) and worm gear (2) engagement, screw in polygonal loose piece (7) center screw by worm-wheel shaft hypomere screw rod (6) and do power screw, make the loose piece displacement, and cam pin (10) that is inserted in pivoted arm in the loose piece circumferential groove and lasso (12), because of blade (8) and pivoted arm (9) put together in runner hub (1) hole, guide slides in the loose piece displacement with groove, be that clamping multi-disc blade is followed revolution, thereby tracking the blade corner, make fixed blade propeller turbine become Kaplan turbine.