The forebay blank of wind power generating set
Technical field
The present invention relates to a kind of part of wind power generating set, be specifically related to a kind of blank of wind power generating set part.
Background technique
General main wind energy conversion system, gear-box, generator, controller and the structural member of comprising of wind power generating set.Structural member comprises underground foundation, pylon and cabin.The cabin comprises base and engine room cover.For the horizontal-shaft wind turbine group of capacity more than 1 megawatt, the base in cabin generally is fixed on the forebay by rear bay and constitutes.Wind energy conversion system comprises blade, wheel hub, main shaft and cowling.Pylon is fixed on the underground foundation; The base in cabin by its forebay from upper fixed on the top of pylon; Spindle bearing holder and gear-box are arranged on the forebay, and spindle bearing holder is from the front end of upper fixed mmi machine frame, and gear-box is by the centre of its casing from upper fixed mmi machine frame.Main shaft bearing is fixed on the spindle bearing holder by its outer ring.Generator is arranged on the rear bay.The blade of wind energy conversion system is fixed on the wheel hub, and the front end of main shaft is fixedly connected with wheel hub, and the centre of main shaft is rotatably connected in the inner ring of main shaft bearing, and the rear end of main shaft is fixedly connected with the power input shaft of gear-box through coupling.The pto of gear-box is fixedly connected with the motor shaft of generator through coupling.
In the above-mentioned parts of wind power generating set, capacity is that weight is at the large-scale ductile iron integral piece more than 10 tons at the forebay of the horizontal-shaft wind turbine group more than 1 megawatt.The spindle bearing holder boss part 22a of the top of the stiffening rib 23a of the front side that is positioned at forebay main body 1a of forebay is the thick large part of forebay foundry goods; And being positioned at the top (seeing Fig. 4 for details) of forebay main body 1a, is the position that is easy to generate shrinkage cavity defect (shrinkage cavity be meant foundry goods shrinks and the hole that produces) most in condensation process in casting technique.Because bolt hole will be stamped to be used for fixing spindle bearing holder in the top of the spindle bearing holder boss part 22a of forebay in the following process process; When spiro keyhole position during in the shrinkage cavity defect position of spindle bearing holder boss part 22a; Then can not play fixing effect; Thereby cause whole foundry goods to be scrapped, cause great economic loss.
Summary of the invention
The purpose of this invention is to provide a kind of forebay blank that does not produce the wind power generating set of shrinkage cavity defect at the bolt hole position.
The technological scheme that realizes the object of the invention is a kind of forebay blank of wind power generating set, is the spheroidal graphite cast iron integral piece, comprises forebay main body, spindle bearing holder assembly department, pylon assembly department, gear-box assembly department and rear bay assembly department;
The basic shape of forebay main body is the cylinder hull shape;
The pylon assembly department is connected on the forebay main body from the below, and is positioned at the below of forebay main body for the plate body that central authorities are provided with the upward and downward through hole; The rear bay assembly department is connected on the forebay main body from the rear, and is positioned at the rear of forebay main body;
The spindle bearing holder assembly department from the place ahead and the top be connected on the forebay main body, and be positioned at the place ahead and the top of forebay main body; The spindle bearing holder assembly department comprises spindle bearing holder mounting groove seat, spindle bearing holder boss part and stiffening rib; Spindle bearing holder mounting groove seat is the semicolumn hull shape, and its axis along front and back to setting, be connected on the forebay main body from the top and be positioned at the forebay main body the front center position the top and forwards stretch out; The spindle bearing holder boss part has 2, and branch is symmetrical set, and lays respectively at the top of the left and right sides of spindle bearing holder mounting groove seat; About the bottom of each spindle bearing holder boss part to midway be equipped with that Open Side Down along front and back to the groove that is provided with, groove is a cuboid shape; Stiffening rib has 2 groups; All be connected on the forebay main body from the place ahead; And the place ahead of the forebay main body that is positioned at; Each upper end of organizing stiffening rib is connected from the below on the position of stretching out the forebay main body forward of corresponding spindle bearing holder boss part, and each lower end of organizing stiffening rib is connected on the pylon assembly department from the top;
The gear-box assembly department comprises tabular arc platform and boss assembly department, and the arc platform is divided into arc left side platform and the right platform of arc; Arc left side platform is connected on the left part top of forebay main body from the top, and stretches out the left part of forebay main body left; The right platform of arc is connected on the right part top of forebay main body from the top, and stretches out the right part of forebay main body to the right; The external diameter of arc platform is greater than the external diameter of forebay main body; The boss assembly department is connected on the arc platform from the top.
The boss assembly department of said gear case assembly department has 6, and branch is symmetrical set, the sagittal middle part of the platform of 1 boss installation position wherein, 1 the boss installation position symmetrical with it in an arc left side in about the right platform of arc to the middle part; Adjacent boss installation position, 2 front and back wherein is in the rear portion, left side of arc platform, and 2 the boss installation positions symmetrical with it are in the rear portion, right side of arc platform.
The left side of above-mentioned forebay main body and right side all have oval-shaped side opening.
The present invention has positive effect: the forebay blank of wind power generating set of the present invention is also when mold design; Just have groove in the bottom of spindle bearing holder assembly department; Thereby attenuate the thickness of spindle bearing holder assembly department; Can effectively prevent the generation of shrinkage cavity, thereby guarantee finished casting rate.
Description of drawings
Fig. 1 is a kind of structural representation of the forebay blank of wind power generating set of the present invention.
Fig. 2 is the structural representation during from right-hand observe of Fig. 1.
Fig. 3 is the structural representation when observing from the top of Fig. 1.
Fig. 4 is the structural representation of forebay finished product in the prior art.
The mark of above-mentioned accompanying drawing is following:
Forebay main body 1, side opening 11,
Spindle bearing holder assembly department 2, spindle bearing holder mounting groove seat 21, spindle bearing holder boss part 22, groove 22-1, stiffening rib 23,
Pylon assembly department 3, through hole 31,
Gear-box assembly department 4, arc platform 41, boss assembly department 42,
Rear bay assembly department 5.
Embodiment
In the embodiment of the present invention to the description in orientation according to the forebay blank of wind power generating set shown in Figure 1 towards carrying out.
(embodiment 1)
See Fig. 1 to Fig. 3, the forebay blank of the wind power generating set of present embodiment is the spheroidal graphite cast iron integral piece, comprises forebay main body 1, spindle bearing holder assembly department 2, pylon assembly department 3, gear-box assembly department 4 and rear bay assembly department 5.
The basic shape of forebay main body 1 is the cylinder hull shape, and the left side of forebay main body 1 and right side all have oval-shaped side opening 11.
Pylon assembly department 3 is the central plate body that is provided with upward and downward through hole 31, and is connected on the forebay main body 1 from the below, and is positioned at the below of forebay main body 1.Rear bay assembly department 5 is connected on the forebay main body 1 from the rear, and is positioned at the rear of forebay main body 1.
Spindle bearing holder assembly department 2 from the place ahead and the top be connected on the forebay main body 1, and be positioned at the place ahead and the top of forebay main body 1.Spindle bearing holder assembly department 2 comprises spindle bearing holder mounting groove seat 21, spindle bearing holder boss part 22 and stiffening rib 23.Spindle bearing holder mounting groove seat 21 is the semicolumn hull shape, and its axis along front and back to setting, be connected on the forebay main body 1 from the top and be positioned at forebay main body 1 the front center position the top and forwards stretch out.Spindle bearing holder boss part 22 has 2, and branch is symmetrical set, and lays respectively at the top of the left and right sides of spindle bearing holder mounting groove seat 21.About the bottom of each spindle bearing holder boss part 22 to midway be equipped with that Open Side Down along front and back to the groove 22-1 that is provided with, groove 22-1 is a cuboid shape.Stiffening rib 23 has 2 groups; All be connected on the forebay main body 1 from the place ahead; And the place ahead of the forebay main body 1 that is positioned at; Each upper end of organizing stiffening rib 23 is connected from the below on the position of stretching out forebay main body 1 forward of corresponding spindle bearing holder boss part 22, and each lower end of organizing stiffening rib 23 is connected on the pylon assembly department 3 from the top.
Gear-box assembly department 4 comprises tabular arc platform 41 and boss assembly department 42, and arc platform 41 is divided into arc left side platform 41-1 and the right platform 41-2 of arc.Arc left side platform 41-1 is connected on the left part top of forebay main body 1 from the top, and stretches out the left part of forebay main body 1 left; The right platform 41-2 of arc is connected on the right part top of forebay main body 1 from the top, and stretches out the right part of forebay main body 1 to the right; The external diameter of arc platform 41 is greater than the external diameter of forebay main body 1, thereby can install and fix engine room cover at arc platform 41.Boss assembly department 42 has 6; Divide and be symmetrical set; All be positioned at the top of arc platform 41,1 boss assembly department 42 wherein is positioned at the sagittal middle part of arc left side platform 41-1,1 the boss assembly department 42 symmetrical with it be positioned at the right platform 41-2 of arc about to the middle part; The adjacent boss assembly department 42 in 2 front and back wherein is positioned at the rear portion, left side of arc platform 41, and 2 the boss assembly departments 42 symmetrical with it are positioned at the rear portion, right side of arc platform 41.