CN101619704B

CN101619704B - Main stand of horizontal axis wind generating set

Info

Publication number: CN101619704B
Application number: CN2009100908025A
Authority: CN
Inventors: 肖禹
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-08-11
Filing date: 2009-08-11
Publication date: 2011-07-20
Anticipated expiration: 2029-08-11
Also published as: CN101619704A

Abstract

The invention relates to a main stand of a horizontal axis wind generating set, which belongs to the field of wind generating sets and mainly aims at improving the strength and reducing the production difficulty and cost so as to solve the constraint problem of a generator impeller replaced by blades. A spindle support shaft (1) and a bearing base (2) of a tower post matcher shaft (6) are connected with each other through a gap bridge (3) in a bridge threading type and a welding manner; all components are made of carbon construction steel sectional materials; the spindle support shaft (1) and the bearing base (2) are in a round steel tubular shape; the gap bridge (3) is in a rectangular steel tubular shape; and a welding bead is in a continuous and annular symmetric shape. The invention has reasonable structure, good stress state of a welding structure, high strength, long service life and low production cost, and is unlikely to be damaged. Producers can meet requirement of users with high quality and low price so that users can provide multiple sets of main stands with different (or identical) offset distances for the same type of tower post matcher to avoid damage of the main frame and constraint of blades, thereby having obvious real and long-term significance, and promoting the development of the industry. The gap bridge (3) also provides a platform and space for a slip ring component (9) for convenient installation, maintenance and replacement.

Description

The mainframe of horizontal axis wind-driven generator group

Technical field

The invention belongs to wind power generation device field, relate to the mainframe of horizontal axis wind-driven generator group.

Background technique

The mainframe of horizontal axis wind-driven generator group, be meant the integral body that the bearing support integral type of spindle support shaft and pylon ducon axle links together, in the application, one end of spindle support shaft is equipped with alternator assembly, its the other end is equipped with the empennage assembly, is contained on the pylon ducon axle by self-contained bearing again; And all has a changeless throw of eccentric S between the axis (being the spin axis of generator or impeller) of axis of the bearing support of every suit mainframe (being the axis of pylon ducon axle or perhaps the axis of wind power generating set support tower) and spindle support shaft, and be only applicable to the blade of some kinds that impeller in the alternator assembly needs, and the blade of each kind all has the best throw of eccentric of its correspondence, and the changeless throw of eccentric S that has of every suit mainframe is consistent with the best throw of eccentric of the blade of its applicable variety in other words; The effective method of the generator overpower mechanical protection protection of going off course exactly in the horizontal axis wind-driven generator group, the blade plane of rotation departs from wind direction gradually along with the raising of wind speed, to realize the safe operation under rated power all the time, and the most important parameter of driftage protection is exactly a throw of eccentric, its size is determining wind power generating set to begin by the wind speed in when protection of being gone off course and the wind speed when deactivating state fully, and throw of eccentric has extremely important influence to the stable operation and the working efficiency thereof of wind power generating set; In the prior art, bearing support in the mainframe generally all is a cast steel, all changeless cylinder type with regard to its physical dimension and shape, Placement between itself and the spindle support shaft and structure are for hanging location, one-sided straight line welding bead type, be that spindle support shaft is close to a lateral vertical straight line type that suspension type is welded to each other together on the cylindrical outer wall of bearing support, for the height of lengthening suspension type one-sided welding bead to increase the intensity of welding bead junction, spindle support shaft adopts the rectangle section bar of structural carbon steel material; Its deficiency is: the one, and bearing support is a cast steel, and casting technique to the control difficulty of material composition and density much larger than structural carbon steel, casting cost height is difficult to again ensure the quality of products, and weldability is undesirable, weld together with the spindle support shaft of structural carbon steel material, intensity susceptible to, quality be cannot say for sure to demonstrate,prove, so the fabricating cost height; The 2nd, because the existence of throw of eccentric, the original position of centre of gravity of horizontal axis wind-driven generator group is the axis that departs from pylon ducon axle, and along with the increase of driftage angle departs from increasing, so connection part is stressed to be concentrated and big, bring adding the unreasonable of welding bead structure stressed unreasonable, intensity is low, therefore, the horizontal axis wind-driven generator group is in service, and the welding bead material at opposite sides is torn and welding bead cracking itself often takes place, and has a strong impact on normal operation; Add in the reality, because manufacture difficulty and cost are limit and the market factor, horizontal axis wind-driven generator group factory " is faithful to one's husband to the end " to the blade of a certain blade supplier's a certain kind, promptly only produce the product that mainframe has same changeless throw of eccentric, for application person, the pylon ducon outfit of same type the mainframes that overlap both just be with same changeless throw of eccentric more, can not break away from the trouble of mainframe easy damaged, simultaneously, because it is ordinary affair that blade injury need be changed, therefore, the restriction that application person also must " be faithful to one's husband to the end " by blade, this is not only having a strong impact on application person's rights and interests, and is obviously restricting the development of the industry; In addition, in the prior art, because the needs and the restriction of main frame structure, spindle support shaft adopts the rectangle section bar of structural carbon steel material, with respect to material round steel pipe of the same race, consumptive material height, cost height, force-bearing situation is also bad, and simultaneously, the slip ring assembly coaxial-type of the external transmission of electricity of generator is contained in the bottom of bearing support, installing space is limited, is not easy to its maintenance and replacing.

Summary of the invention

The technical problem that solves:

Provide a kind of spindle support shaft and bearing support the two mainframe that links together by gap bridge, can overcome the deficiencies in the prior art, parts all adopt the carbon structure steel profile, remove the difficulty of casting from, weldability is good, weld strength height each other, and cost is low, Placement and structure adopt " wearing bridge " location, welding bead is continuous and ring-type symmetric form, than hanging the location, one-sided straight line welding bead type force-bearing situation is good, the intensity height, bridge structure makes welded structure intensity have any problem hardly on bearing capacity, therefore, quality is guaranteed, and fabricating cost is low, can be easily, easy making has the mainframe of different changeless throw of eccentric S, satisfy application person's needs, ensure its rights and interests, both exempted the trouble of mainframe easy damaged, break away from the restriction that " be faithful to one's husband to the end " by blade again, can promote the development of the industry greatly.

The technological scheme that adopts:

The mainframe of horizontal axis wind-driven generator group, the bearing support of the pylon ducon axle that comprises spindle support shaft and link together with it, has throw of eccentric S between the axis of bearing support and the axis of spindle support shaft, it is characterized in that: the bearing support of spindle support shaft and pylon ducon axle interconnects by gap bridge, the axial horizontal of spindle support shaft is passed and is passed a bridge and be welded to each other together with it, and bearing support is axially rectilinear to be passed and pass a bridge and be welded to each other together with it.

Beneficial effect:

Each parts of mainframe all adopt the carbon structure steel profile, and spindle support shaft and bearing support are round steel tubing, therefore, easily make, weldability is good, mutual weld strength height, cost is low, Placement and structure adopt " wearing bridge " location, welding bead is continuous and ring-type symmetric form, than hanging the location, welding bead is one-sided straight vertical line style stress condition, the intensity height, bridge structure, make the carrying of being passed a bridge of the axis of deviation of gravity center bearing support of horizontal axis wind-driven generator group and the active force that the brings overwhelming majority, therefore can make welding and welded structure intensity have any problem hardly on bearing capacity, therefore, quality is guaranteed, and fabricating cost is low, the intensity height is difficult to damage, long service life; Can very convenient, easyly make mainframe with different changeless throw of eccentric S, the satisfied application person's that the producer is can be high-quality inexpensive needs, make application person can be easy to be equipped with the mainframe that several covers have difference (or identical) throw of eccentric for the pylon ducon polygamy of same type, can exempt the trouble of mainframe easy damaged, can break away from the restriction that " be faithful to one's husband to the end " by blade again, have very obvious practical and far-reaching significance, and can promote the development of this sunshine industry of wind-power electricity generation greatly, help society; In addition, the slip ring assembly of passing a bridge to the external transmission of electricity of generator provides firm platform and space, with its top that is installed in bearing support, is convenient to install, safeguards and changes.

Description of drawings

Fig. 1, Overall Group's assembling structure schematic representation;

Fig. 2, press the A-A sectional view of the mainframe shown in Fig. 1;

Fig. 3, press the B-B partial sectional view of the mainframe shown in Fig. 1;

Embodiment

Further explanation in detail in conjunction with the accompanying drawings;

Among Fig. 1,6 are shown pylon ducon axle, and 7-is shown bearing, and 8-is shown locknut, and 9-is shown slip ring assembly, and 10 are shown pylon together with its ducon; 1～being shown spindle support shaft, the one end is equipped with alternator assembly, and the other end is equipped with the empennage assembly;

Shown in Fig. 1～3, the structure of mainframe is as follows:

The bearing support 2 of spindle support shaft 1 and pylon ducon axle 63 interconnects by passing a bridge, and spindle support shaft 1 axial horizontal is passed and passed a bridge 3 and be welded to each other together with it, and bearing support 2 is axially rectilinear to be passed gap bridge 3 and be welded to each other together with it; Has throw of eccentric S between the axis x-x ' of the axes O-O ' of bearing support 2 and spindle support shaft 1; ,

Spindle support shaft 1, bearing support 2 and pass a bridge and 3 all adopt the carbon structure steel profile, spindle support shaft 1 and bearing support 2 are the round steel cast, passing a bridge 3 is the rectangle steel cast;

Spindle support shaft 1 axial level is passed 3 two the opposing vertical faces of passing a bridge and is welded to each other together with it, and corresponding vertical position welding road 4 symmetric types are positioned at the outside of 3 two the opposing vertical faces of passing a bridge, and is respectively continuously and the ring-type type; Bearing support 2 axially vertically passes 3 two the relative horizontal planes and be welded to each other together with it of passing a bridge, and corresponding downhand welding road 5 symmetric types are positioned at the outside of 3 two the relative horizontal planes of passing a bridge, and is respectively continuously and the ring-type type.

As shown in Figure 1, during mainframe is used, gap bridge 3 provides firm platform and space for the slip ring assembly 9 of the external transmission of electricity of generator, be contained in to slip ring assembly 9 coaxial and detachable property the top of the locking nut 8 of bearing 7, bearing 7 is contained in the bearing support 2, locking nut 8 is tightened on the pylon ducon axle 6, makes slip ring assembly 9 both be convenient to install, and is convenient to again safeguard and change.

About driftage principle and relevant problem thereof:

In the horizontal axis wind-driven generator group; best throw of eccentric is meant throw of eccentric required when entering the driftage guard mode at once under rated wind speed (corresponding to the rated power of generator); the ratio of lift coefficient to drag coefficient of impeller diameter, blade, wind speed three have determined the size of the axial force that under certain wind speed impeller is suffered jointly, and the amassing of the throw of eccentric S between this power and pylon ducon axle and the spindle support shaft is running torque M ₁, and the M under the rated wind speed ₁Be exactly the initial torque that the horizontal axis wind-driven generator group begins to enter the driftage guard mode---be best torque, also be that this best torque can make the horizontal axis wind-driven generator group enter the driftage guard mode at once under rated wind speed, and corresponding described throw of eccentric S is and the corresponding best throw of eccentric of described blade, in other words, the blade of each kind all has the best throw of eccentric S of its correspondence; In the wind power generating set, supporting and be contained in the empennage of spindle support shaft afterbody band hinge type rotational structure with impeller, because the rotating shaft of its hinge is not orthogonal to ground (working surface that is empennage is not orthogonal to ground), therefore the weight of empennage can produce a horizontal component, and this power produces a changeless running torque M in the horizontal axis wind-driven generator group ₂, work as M ₁≤ M ₂The time, under the empennage effect, impeller plane of rotation vertically-supplying air is worked as M to operation ₁＞M ₂The time, the impeller plane of rotation departs from the wind direction operation, promptly enters the driftage guard mode; Therefore, for a whole set of intrinsic horizontal axis wind-driven generator group, the setting of the throw of eccentric S of its mainframe (device install to be used the back and claimed online throw of eccentric) is and the selecting for use of blade, the supporting correspondence of design of empennage, for the online horizontal wind power generating set of using is installed, generally speaking, empennage can be not impaired, do not exist to change or change and design, and the damage of the blade of impeller happens occasionally down to fractureing in the alternator assembly, and the replacing blade, must select for use rated wind speed identical also is its best throw of eccentric blade identical with online throw of eccentric, otherwise, if best throw of eccentric is greater than online throw of eccentric, the initial wind speed in when protection driftage and the wind speed when deactivating state large time delay greatly all then is easy to overload operation and burns generator, otherwise, then the initial wind speed in when protection driftage and the wind speed when deactivating state all can be leading greatly, and generator power is descended; Therefore, solving application person is subjected to the best approach of " blade is faithful to one's husband to the end " restriction just to provide high-quality inexpensive mainframe, the intensity height, be difficult to damage, thereby long service life makes application person can be easier be equipped with the mainframe that several covers have difference (or identical) throw of eccentric for the pylon ducon polygamy of same type, can exempt the trouble of mainframe easy damaged, can break away from the restriction that " be faithful to one's husband to the end " by blade again, have very obvious practical and far-reaching significance.

Claims

1. the mainframe of horizontal axis wind-driven generator group, the bearing support of the pylon ducon axle that comprises spindle support shaft and link together with it, has throw of eccentric S between the axis of bearing support and the axis of spindle support shaft, it is characterized in that: the bearing support of spindle support shaft and pylon ducon axle interconnects by gap bridge, the axial horizontal of spindle support shaft is passed and is passed a bridge and be welded to each other together with it, and bearing support is axially rectilinear to be passed and pass a bridge and be welded to each other together with it; Spindle support shaft, bearing support and gap bridge all adopt the carbon structure steel profile, and spindle support shaft and bearing support are the round steel cast, pass a bridge to be the rectangle steel cast.

2. the mainframe of horizontal axis wind-driven generator group according to claim 1, it is characterized in that: spindle support shaft (1) axially level passes two opposing vertical faces of gap bridge (3) and is welded to each other together with it, corresponding vertical position welding road (4) symmetric type is positioned at the outside of two opposing vertical faces of gap bridge (3), and is respectively continuous and ring-type type; Bearing support (2) axially vertically passes two relative horizontal planes of gap bridge (3) and is welded to each other together with it, and corresponding downhand welding road (5) symmetric type is positioned at the outside of two relative horizontal planes of gaps bridge (3), and is respectively continuous and ring-type type.