CN201531356U

CN201531356U - Novel fender

Info

Publication number: CN201531356U
Application number: CN200920267856XU
Authority: CN
Inventors: 吴文政
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-10-16
Filing date: 2009-10-16
Publication date: 2010-07-21
Anticipated expiration: 2019-10-16

Abstract

The utility model discloses a novel fender, wherein the fender is arranged at a hollow cavity between a rotating wheel upper canopy and a front cover plate, a front end at the outer side of the fender is tightly adhered to the inner side of an upper leakage proof ring, the fender implements positioning with the front cover plate via a rabbet, the fender is composed of a bottom plate, inner/outer circular bodies and a plurality of radial partitions, the partitions divide the hollow cavity between the rotating wheel upper canopy and the front cover plate into a plurality of fan-shaped areas so as to prevent sands from high-speed rotation along with water stream, avoid the damage of sand erosion towards to the front cover plate and further protect the front cover plate, the partitions are provided with a plurality of screw fixing holes, through which hexagon bolts lock the fender and the front cover plate together. The fender can prolong the service life of related parts of hydraulic turbine and lower the operation and management cost of users.

Description

A kind of novel backplate

Technical field

The utility model belongs to the turbine parts field, relates to a kind of novel backplate.

Background technique

Water turbine belongs to hydroelectric facility, is widely used in places such as water power plant, it be a kind of can be the transformation of energy of current the dynamic power machine of rotating mechanical energy, finally drive the generating of generator.The water turbine that generally uses is when normal operation at present, because all there are the bigger problem in cavity in the crown of its runner and front shroud, will make the local space of runner periphery form negative pressure state like this, the part that the existence of this state will cause the runner periphery at short notice is by cavitation and cause being damaged, silt can enter with current, follow the high speed rotating of runner, can cause cover plate by serious sand cutting, even can cause the cover plate perforation, situation such as leak, just can only change in this case, will increase the expense of user aspect operation management like this cover plate and nipple and other correlated parts.

Summary of the invention

For the part that solves above-mentioned existing runner periphery easily by sand cutting and cause being damaged, problem that the operation management cost is high, the utility model provides a kind of novel backplate, it has remedied the bigger defective of crown and the existing cavity of front shroud of runner, make that this space is dwindled greatly, enter thereby reduce the current that have silt, the part of having avoided the runner periphery is by sand cutting.

In order to achieve the above object; the utility model adopts following concrete technological scheme: a kind of novel backplate; its structure characteristic is; backplate is arranged on the place, cavity between runner crown and front shroud; avris fits tightly in the front end of the outer avris of backplate and the last seal ring; backplate is realized the location by seam and front shroud; backplate is by base plate; the internal and external circumference body; polylith radially dividing plate is formed; dividing plate is divided into a plurality of sector regions with the punishment of the cavity between runner crown and front shroud; so just can stop silt with the current high speed rotating; avoid front shroud destroyed by sand cutting; thereby play the effect of protection front shroud; dividing plate is provided with a plurality of screw fixed holes, and hexagon head bolt is locked together backplate and front shroud by the screw fixed hole.

The beneficial effects of the utility model are the working life that it can prolong each correlated parts of water turbine, reduce user's operation management cost.

The utility model is described in further detail below in conjunction with drawings and Examples.

Description of drawings

Fig. 1 is the utility model side cross-sectional view;

Fig. 2 is the utility model master TV structure schematic representation;

Fig. 3 for the utility model in water turbine with other constituent element cross-sectional view that is connected.

Among the figure: the 1-spiral case, the 2-back shroud, the 3-vacuum gauge, 4-vacuum gauge outfit, the 5-seal ring, the 6-stud, the 7-hexagon nut, the 8-pad, seal ring under the 9-, the 10-stud, the 11-hexagon nut, the 12-nipple, the 13-tail cone, the 14-gate valve, the 15-hexagon head bolt, the 16-hexagon nut, the 17-round nut, the 18-blowdown pipe, the 19-pad, the 20-hexagon head bolt, the 21-hexagon nut, 22-blowdown pipe support, hexagonal round head bolt in the 23-, the 24-runner, 25-transfers the ring screw, the 26-hand hole cover, the 27-hexagon head bolt, the 28-pad, the 29-Discharging bent-tube, the 30-draft tube, the 31-hexagon head bolt, the 32-hand hole cover, the 33-pad, the 34-front shroud, the 35-speed ring, the 36-small rocker, 37-speed ring axle sleeve, the 38-droop adjustment screw, the 39-hexagon thin nut, 40-stator axle sleeve, the 41-seal ring, 42-stator differential, the 43-hexagon head bolt, the 44-straight pin, the last seal ring of 45-, the 46-backplate, the 47-hexagon head bolt, the 48-pad, 49-drain pipe joint, the 50-capping, 51-thread seal circle, the 52-hexagon head bolt, the 53-hexagon nut, the 54-water-throwing disk, the 55-hexagon head bolt, the 56-hexagon nut, the 57-main shaft, 58-main shaft differential, the 59-stud, the 60-hexagon nut, the 61-asbestos rope, the 62-key, the 63-hexagon head bolt, 64-speed governing gudgeon cover, the 65-stator, the 66-hexagon head bolt, 67-copper water is chewed

Embodiment

As Fig. 1, Fig. 2, shown in Figure 3, a kind of novel backplate, backplate 46 is arranged on the place, cavity of 34 of runner 24 crowns and front shrouds, avris fits tightly in the front end of backplate 46 outer avris and the last seal ring 45, backplate 46 is realized the location by seam and front shroud 34, backplate 46 is by base plate 461, internal and external circumference body 462, eight radially dividing plate 463 form, dividing plate 463 is divided into eight sector regions with the cavity punishment of 34 of runner 24 crowns and front shrouds, dividing plate 463 is provided with four screw fixed holes 464, and hexagon head bolt 47 is locked together backplate 46 and front shroud 34 by screw fixed hole 464.

Claims

1. novel backplate, it is characterized in that, backplate (46) is arranged on the place, cavity between runner (24) crown and front shroud (34), the front end of the outer avris of backplate (46) and the interior avris of last seal ring (45) fit tightly, backplate (46) is realized the location by seam and front shroud (34), backplate (46) is by base plate (461), internal and external circumference body (462), polylith radially dividing plate (463) is formed, dividing plate (463) is divided into a plurality of sector regions with the punishment of the cavity between runner (24) crown and front shroud (34), dividing plate (463) is provided with a plurality of screw fixed holes (464), and hexagon head bolt (47) is locked together backplate (46) and front shroud (34) by screw fixed hole (464).