Self-contained mixed flow vertical hydrogenerator group
Technical field
The utility model relates to the hydraulic generator unit, especially a kind of self-contained mixed flow vertical hydrogenerator group.
Background technique
Present small hydro turbine group is horizontal bulk type, and promptly water turbine and generator are autonomous device, and is on the ground horizontally-arranged respectively, by coupling it interconnected.The problem that horizontal bulk type hydraulic generator unit exists is: 1. complex structure is loose, and manufacture cost is higher; 2. because of being horizontal layout, floor space is big; 3. the combination of rotatable parts and fixed component need laterally be carried out with decomposition, and crane is used in inconvenience, and installation, maintenance are relatively more difficult; 4. all need install 90 ° of bend pipes additional before the spiral case and in the draft tube, the hydraulic loss when having increased overcurrent influences generating efficiency.
Summary of the invention
The purpose of this utility model is loose at the complex structure of the horizontal bulk type small hydro turbine group existence of present use, manufacture cost is higher, floor space is big, install, overhaul relatively difficulty, hydraulic loss is big, influences the problem of generating efficiency, a kind of compact structure is provided, floor space is little, and it is convenient to install, overhaul, the self-contained mixed flow vertical hydrogenerator group that generating efficiency is high.
Self-contained mixed flow vertical hydrogenerator group described in the utility model comprises generator, water turbine and draft tube.Generator is installed in the water turbine top by generator stand, with the shared main shaft of water turbine.Draft tube is installed in the water turbine below.Water turbine is made of ring, stator, seat ring and spiral case, blade control mechanism, top cover, top cover water stop ring, sealing seat, packing and packing gland and waste pipe under ring, the water distributor on runner, the water distributor.Ring, water distributor encircle down and are positioned at the runner outside on the water distributor.Seat ring and spiral case are positioned at ring on the water distributor, the water distributor outside of ring down.Stator is between encircling under ring, the water distributor on the water distributor, along circumferentially uniform.The runner of water turbine is connected by tapered sleeve, housing screw and generator shaft.The leak safety of the generator that influences close proximity of the top cover that usually occurs for fear of water turbine, the utility model has adopted the outer draining device that is made of top cover water stop ring, top cover and waste pipe.Have sealing teeth groove A between top cover water stop ring and the runner, increase the resistance to water, minimizing is leaked, and has the upper strata space B between top cover water stop ring and the top cover, can utilize centrifugal force to leak and concentrate on the outside of upper strata space B.The upper end of waste pipe communicates by the outside of top cover with the upper strata space B, and the lower end of waste pipe communicates with the C place, upper end of draft tube.Leaking in the space B of upper strata exerted pressure to waste pipe inlet under centrifugal action, and the drainpipe outlet place, leaks and can discharge fully under the back suction effect of preceding pressure then because of hydraulic turbine outlet flowing water forms negative pressure simultaneously, can be along the main shaft overflow.
The blade control mechanism is made of guide vane teunnion, rotation connecting lever, connecting rod rotating shaft, connecting rod.Guide vane teunnion is connected with stator is vertical.The rotation connecting lever is radially external, and inner and guide vane teunnion is hinged, and the outer end is provided with two connecting rod rotating shafts.In the adjacent connecting rod rotating shaft of two adjacent rotation connecting levers connecting rod is housed, makes its line equal and parallel with two guide vane teunnions.So the line between the two adjacent connecting rod rotating shafts of two guide vane teunnions and rotation connecting lever constitutes a variable parallelogram.All stators of water turbine all link to each other in twos by guide vane teunnion, rotation connecting lever, connecting rod, rotate any stator, and all stators rotate thereupon, and corner equates.
To larger-size self-contained mixed flow vertical hydrogenerator group, check that for convenient the tail water tube wall is provided with and enters the hole.
The self-contained mixed flow vertical hydrogenerator group that size is less, draft tube is made of for removable section draft tube section of burying underground and draft tube.Removable section top of draft tube is connected with the draft tube section of burying underground by upper flange, the bottom by lower flange be embedded in concrete in the foundation ring of draft tube elbow be connected.
Lower flange is one alive orchid, and living and sending out an orchid is an annulus that matches with removable section lower edge of tapered draft tube, and this lower edge, annulus inboard has annular chamfer, in the space of this annular chamfer and the formation of tapered draft tube lower edge O-ring seal is housed.Blue being fixed on the foundation ring by clamping bolt of living compresses tapered draft tube and seal by O-ring seal for removable section.
The utility model has the advantages that compact structure, floor space is little, and it is convenient to install, overhaul, the generating efficiency height.
Description of drawings
Fig. 1 is the structural drawing of the self-contained mixed flow vertical hydrogenerator of the utility model group;
Fig. 2 is that blue structural drawing is sent out in removable section work of tapered draft tube;
Fig. 3 is the structural drawing of water turbine part;
Fig. 4 is the structural drawing of water turbine partial blade control mechanism.
Embodiment
As Fig. 1, shown in Figure 3, self-contained mixed flow vertical hydrogenerator group described in the utility model comprises generator 1, water turbine 2 and draft tube 3,11.Generator 1 is installed in the top of water turbine 2 by generator stand 19, with the shared main shaft 23 of water turbine.Draft tube 3,11 is installed in water turbine 2 belows.As shown in Figure 3, water turbine 2 by encircle 15 on runner 10, the water distributor, ring 12, stator 13, seat ring and spiral case 14, blade control mechanism 28, top cover 20, top cover water stop ring 21, sealing seat 22, packing and packing gland 24 and waste pipe 25 constitute water distributor down.Encircle 15 on the water distributor, water distributor down ring 12 be positioned at runner 10 outsides.Seat ring and spiral case 14 be positioned at encircle 15 on the water distributor, the water distributor outside of ring 12 down.Stator 13 encircle 15 on the water distributor, under the water distributor between the ring 12, along circumferentially uniform.The runner 10 of water turbine 2 is connected with generator shaft 23 by tapered sleeve 26, housing screw 27.The leak safety of the generator that influences close proximity of the top cover that usually occurs for fear of water turbine, the utility model has adopted the outer draining device that is made of top cover water stop ring 21, top cover 20 and waste pipe 25.Have sealing teeth groove A between top cover water stop ring 21 and the runner 10, can increase the resistance to water, minimizing is leaked; Have the upper strata space B between top cover water stop ring 21 and the top cover 20, can utilize centrifugal force to leak and concentrate on the periphery of upper strata space B.The upper end of waste pipe 25 communicates by the outside of top cover 20 with the upper strata space B, and the lower end of waste pipe 25 communicates with the C place, upper end of the draft tube section of burying underground 11.Leaking in the space B of upper strata exerted pressure to waste pipe 25 inlets under centrifugal action, and waste pipe 25 outlet ports, leak and can discharge fully under the back suction effect of preceding pressure then because of hydraulic turbine outlet flowing water forms negative pressure simultaneously, can be along the main shaft overflow.
As shown in Figure 4, blade control mechanism 28 is made of guide vane teunnion 29, rotation connecting lever 16, connecting rod rotating shaft 18, connecting rod 17.Guide vane teunnion 29 and 13 vertical connections of stator.Rotation connecting lever 16 is radially external, and inner and guide vane teunnion 29 is hinged, and the outer end is provided with two connecting rod rotating shafts 18.In the adjacent connecting rod rotating shaft 18 of two adjacent rotation connecting levers 16 connecting rod 17 is housed, makes its line equal and parallel with two guide vane teunnions 29.So the line between the two adjacent connecting rod rotating shafts 18 of two guide vane teunnions 29 and rotation connecting lever constitutes a variable parallelogram.Water turbine 2 all stators 13 all link to each other in twos by guide vane teunnion 29, rotation connecting lever 16, connecting rod 17, rotate any stator, and all stators 13 rotate thereupon, and corner equates.
To larger-size self-contained mixed flow vertical hydrogenerator group, check that for convenient the tail water tube wall is provided with and enters the hole.
As shown in Figure 1 and Figure 2, the self-contained mixed flow vertical hydrogenerator group that size is less, draft tube is made of for removable section 3 draft tube section of burying underground 11 and draft tube.Removable section 3 top of draft tube is connected with the draft tube section of burying underground 11 by upper flange 30, the bottom by live flange 7 be embedded in concrete in the foundation ring 8 of draft tube elbow 4 be connected.
As shown in Figure 2, living and sending out blue 7 is an annulus that matches with removable section 3 lower edge of tapered draft tube, and the inboard lower edge of this annulus has annular chamfer 5, in the space that this annular chamfer 5 and tapered draft tube lower edge form O-ring seal 9 is housed.An orchid 7 that lives is fixed on the foundation ring 8 by clamping bolt 6 tapered draft tube is compressed and seals by O-ring seal 9 for removable section 3.