CN101709742B

CN101709742B - Combined bearing for main shafts of direct-drive wind generating sets

Info

Publication number: CN101709742B
Application number: CN200910066098XA
Authority: CN
Inventors: 丁承楼; 王景夏; 吴朝阳
Original assignee: Changzhou Guangyang Bearing Co Ltd
Current assignee: Changzhou Guangyang Bearing Co Ltd
Priority date: 2009-09-01
Filing date: 2009-09-01
Publication date: 2011-04-27
Anticipated expiration: 2029-09-01
Also published as: CN101709742A

Abstract

The invention discloses a combined bearing for main shafts of direct-drive wind generating sets. Parts of a bearing include an outer ring, a first inner ring, a second inner ring, a steel ball, an axial cage, a roller, a radial cage and a sealing component, wherein the outer surfaces of the outer ring, the first inner ring and the second inner ring are provided with anticorrosion layers; the bearing is at a contact angle of 15 degrees and is guided by a rolling body; the outer ring has a T-shaped structure; the axial upper and lower surfaces of the inner side of the outer ring are provided with a row of channels and lock points respectively; the first inner ring is transversely provided with axial channels and lock points corresponding to the channels and the lock points on the axial lower surface of the outer ring; the second inner ring is axially provided with the axial channels and the lock points corresponding to the channels and the lock points on the axial upper surface of the outer ring; and the axial cage and the radial cage are integral cages. The bearing has the characteristics of good sealing performance, high reliability, long lifespan, compact structure, good lubricity, flexible rotation and stable operation, and can simultaneously bear high axial and radial combined loads, as well as large overturning moment.

Description

Combined bearing for main shafts of direct-drive wind generating sets

Technical field

The invention belongs to the application of bearing technology on wind power plant, relate generally to a kind of combined bearing for main shafts of direct-drive wind generating sets.

Background technique

At present, the three-row cylinder roller combination bearing that adopts on the direct-drive aerogenerator main shaft.This airframe bearing can bear simultaneously bigger radially, axial load and tilting moment.Because wind power plant is installed and used the particularity of environment, requires bearing to have high reliability, excellent sealing performance, go slick, and the life-span surpass 20 years etc.

The three-row cylinder roller combination bearing is applicable to horizontal positioned, heavy duty, slow-revving operating mode, and the direct-drive aerogenerator main shaft bearing is vertical mounting type, and applying working condition is: the heavy duty, run up.Cause bearing to lose efficacy in advance, the maintenance period of equipment has been shortened in the frequent maintenance and more renew bearing of having to, and has increased the maintenance expenses of equipment, has improved cost of electricity-generating.

Summary of the invention

The purpose of this invention is to provide a kind of combined bearing for main shafts of direct-drive wind generating sets, this bearing has excellent sealing performance, reliability height, long service life, compact structure, surface anticorrosion processing, greasy property is good, rotation is flexible, characteristics stably turn round, can bear higher axial and joint load radially simultaneously, and bigger tilting moment.

Purpose of the present invention can adopt following technological scheme to realize: described bearing parts comprises outer ring, first inner ring, second inner ring, steel ball, axial cage, roller, radially retainer, black box, first inner ring and second inner ring are connected and fixed by bolt, the outer surface of the outer ring and first inner ring, second inner ring is provided with anticorrosive coat, bearing contact angle is 15 °, the rolling element guiding; Described outer ring is the structural type of T type, be respectively arranged with row's raceway groove below the outer ring inner shafts makes progress, reach the lock point, the outer ring aperture surface is provided with raceway and two ribs, one of them rib is provided with dress roller breach, and the end face of outer ring is provided with the erection opening mounting hole and seal groove respectively has two row's oil hole and oil outlets up and down at outer ring external diameter face; First inner ring is horizontally arranged with and the axially following raceway in outer ring, the lock corresponding axial channels of point and lock point, first inner ring radially is provided with and the outer ring corresponding raceway of raceway radially, erection opening, seal groove and mounting hole are arranged on its large end face, small end face is provided with and bolted connecting hole, and aperture surface respectively has two row's oil hole and oil outlets up and down; Second inner ring axially is provided with and the axially top raceway groove in outer ring, the lock corresponding axial channels of point and lock point, Bolt Connection hole, erection opening and seal groove are arranged on its large end face, small end face is provided with and the corresponding mounting hole of the first inner ring mounting hole, and aperture surface respectively has two row's oil hole and oil outlets up and down.

Described axial cage is an integral cage.

Described radially retainer is an integral cage.

The rolling surface of described roller is the complete protruding spheric structure with protrusion amount.

Described black box is the structural type of canvas filler rubber and spring ring combination.

The pocket hole of described axial cage is the structural type in pocket hole of taking turns up and down., retainer pocket hole is billiard table body and the tangent structural type of cylindrical body

The structural type of the whole S-shaped curve of described radially retainer, retainer pocket hole is cylindrical structural type.

By last structure as can be seen, the bearing of the present invention's design is: an outer ring, one first inner ring, one second inner ring, axial two rows steel ball, two solid cages, radially a row roller, a solid cage, two black boies and connect first inner ring and the combining form of the second inner ring bolt; Axially wrapping angle α, α 1 are 15 °, and the design of this angle is in order to make bearing can bear higher axial load and bigger tilting moment; The design of radial roller is in order to make bearing can bear higher radial load; The design of rolling element guidance mode had both reduced frictional heating, had reduced friction factor, can make the bearing rotation again flexibly; Bearing removes sealing part, and all the other outside surface anticorrosions are handled, and can prolong the working life of bearing.

Outer ring T type structure Design form can be utilized each working surface fully; One row's raceway groove and lock point are axially respectively arranged up and down in the outer ring, with the two row's steel balls of packing in first inner ring and corresponding raceway groove of second inner ring and the lock point, both made bearing can bear higher axial load and bigger tilting moment, guarantee the matching requirements of bearing again, solved the sequence of sanqu songs within a particular musical mode problem of bearing simultaneously; Aperture surface has raceway and two restriction Roller Shaft to the rib of throwing, and the breach that makes things convenient for roller to pack into is arranged on one of them rib; The design of upper-lower seal groove had both made things convenient for packing into of black box, can prevent leaking of lubricating grease again; Mounting hole on the outer ring can conveniently connect with bolt on the blade, and erection opening is convenient to bearing processing, the lifting when installing; Diametric plane respectively has two row's oil hole and oil outlets up and down outside, and oil hole is beneficial to the lubricated of bearing for bearing provides fresh grease, and oil outlet makes things convenient for the discharge of excessive fuel consumption.

Can make things convenient for packing into of steel ball between the raceway groove of the first inner ring axial channels and lock point and outer ring and the lock point, this design had both guaranteed the matching requirements of bearing, had solved the sequence of sanqu songs within a particular musical mode problem of bearing simultaneously again; Radially can make things convenient for roller and packing into of retainer radially between raceway and the outer ring raceway, make bearing can bear higher radial load; Erection opening on the large end face is convenient to bearing processing, the lifting when installing; Seal groove cooperates with the seal groove of outer ring can make things convenient for packing into of black box; Mounting hole on first inner ring can conveniently connect with bolt on the generator unit stator, has the connecting hole of the connecting hole and second inner ring to play anastomosis on the small end face; Aperture surface respectively has two row's oil hole and oil outlets up and down, and oil hole is beneficial to the lubricated of bearing for bearing provides fresh grease, and oil outlet makes things convenient for the discharge of excessive fuel consumption.

Can make things convenient for packing into of steel ball between the raceway groove of the second inner ring axial channels and lock point and outer ring and the lock point, this design had both guaranteed the matching requirements of bearing, had solved the sequence of sanqu songs within a particular musical mode problem of bearing simultaneously again; The connecting hole of the connecting hole on the large end face and first inner ring plays anastomosis; Erection opening is convenient to bearing processing, the lifting when installing; Seal groove cooperates with the seal groove of outer ring can make things convenient for packing into of black box; Have on the small end face with first inner ring on the corresponding mounting hole of mounting hole; Aperture surface respectively has two row's oil hole and oil outlets up and down, and oil hole is beneficial to the lubricated of bearing for bearing provides fresh grease, and oil outlet makes things convenient for the discharge of excessive fuel consumption.

The rolling surface of roller is complete protruding SR, and the protrusion amount is δ, and under fully loaded transportation condition, it can utilize the length of roller fully, makes stress distribution reach best, avoids the roller edge to produce the stress concentration phenomenon, improves the working life of bearing.

Axial cage is the structural type in the following on the whole pocket hole of taking turns, and retainer pocket hole is designed to cylindrical body and the tangent structure of billiard table body; Top, pocket hole is cylindrical body, makes things convenient for packing into of steel ball when bearing assembles, and bottom, pocket hole is that the billiard table body is that camber line contacts with the rolling surface of steel ball, has both controlled the sag of chain of retainer, guarantees that again bearing rotates requirement flexibly, makes the running of bearing more steady.

The whole S-shaped curvilinear structures form of retainer radially, this structural design makes things convenient for packing into of roller, has reduced the difficulty of retainer processing technology and assembly technology; Cylindrical pocket hole, but maximum area contains the rolling surface of roller, thus realize that bearing turns round safely and smoothly; Lock point on the inside and outside footpath, pocket hole can pin the roller in the retainer pocket hole of packing into up and down, and the bearing rotation flexibly, controlled the sag of chain of retainer simultaneously again, makes the contact of retainer discord lasso rib produce friction, has reduced frictional heating and noise.

Black box is the structural type of canvas filler rubber and spring ring combination, the intensity of canvas filler rubber with enhanced leaktightness is adopted on its top, the lip of bottom adopts soft rubber to cooperate with the seal groove of first inner ring, second inner ring, and spring encloses the effect of enhanced leaktightness performance.

In sum, the present invention has excellent sealing performance, reliability height, long service life, compact structure, surface anticorrosion processing, greasy property is good, rotation is flexible, characteristics stably turn round, can bear higher axial and joint load radially simultaneously, and bigger tilting moment.

Description of drawings

Accompanying drawing 1 is a structural representation of the present invention.

Accompanying drawing 2 is the outer ring structure schematic representation.

Accompanying drawing 3 is Fig. 2 rib breach schematic representation.

Accompanying drawing 4 is the first inner ring structural representation.

Accompanying drawing 5 is the second inner ring structural representation.

Accompanying drawing 6 is the roller structure schematic representation.

Accompanying drawing 7 is the axial cage structural representation.

Accompanying drawing 8 is Fig. 7 pocket hole structure schematic representation.

Accompanying drawing 9 is retainer structural representation radially.

Accompanying drawing 10 is the A-A view of Fig. 9.

Accompanying drawing 11 is the seal component architecture schematic representation.

Among the figure: 1, the outer ring, 2, first inner ring, 3, second inner ring, 4, steel ball, 5, axial cage, 6, roller, 7, retainer radially, 8, black box, 9, bolt, 10, anticorrosive coat, 11,11a, raceway groove, 12,12a, the lock point, 13, the 13a raceway, 14, rib, 15, breach, 16, mounting hole, 17, erection opening, 18,18a, connecting hole, 19,19a, seal groove, 20,20a, 20b, oil hole, 21,21a, 21b, oil outlet, 22, the 22a raceway groove, 23,23a locks point, 24,24a, large end face, 25,25a, small end face, 26,26a, erection opening, 27,27a, seal groove, 28,28a, mounting hole, 29,29a, the pocket hole, 30, top, pocket hole, 31, bottom, pocket hole, 32,33, the lock point, 34, canvas filler rubber, 35, spring ring, 36, lip.

Embodiment

In conjunction with the accompanying drawings, specific embodiments of the invention are described.

As shown in Figure 1: its part of bearing of the present invention comprises: outer ring 1, first inner ring 2, second inner ring 3, steel ball 4, axial cage 5, roller 6, radially retainer 7, black box 8, bolt 9, and anticorrosive coat 10.

Steel ball 4 wrapping angle α, the α 1 of bearing are designed to 15 °, and the design of this angle is in order to make bearing can bear higher axial load and tilting moment simultaneously; The design of radial roller 6 is in order to make bearing can bear higher radial load; Bearing removes sealing part, and the processing of all the other outside surface anticorrosion layers 10 can prolong working life of bearing.

As accompanying drawing 2, shown in Figure 3: the T type structural design form of outer ring 1 can be utilized each working surface fully; 1 axially respectively has row raceway groove 11, a 11a and

lock point

12,12a up and down in the outer ring, with the two row's steel balls 4 of packing in first inner ring 2 and second inner ring, 3 corresponding raceway grooves 22,22a and lock point 23, the 23a.Outer ring 1 aperture surface is provided with raceway 13 and two ribs 14 that restriction roller 6 is axially thrown, and the breach 15 that makes things convenient for roller 6 to pack into is arranged on one of them rib 14; The design of upper-lower seal groove 19,19a had both made things convenient for packing into of black box 8, can prevent leaking of lubricating grease again; Mounting hole 16 on the outer ring 1 can conveniently connect with bolt on the blade, and erection opening 17 is convenient to bearing processing, the lifting when installing; Diametric plane respectively has two row's oil hole 20 and oil outlets 21 up and down outside, and oil hole 20 is beneficial to the lubricated of bearing for bearing provides fresh grease, and oil outlet 21 makes things convenient for the discharge of waste oil.

As shown in Figure 4: can make things convenient for packing into of steel ball 4 between the raceway groove 11 of first inner ring, 2 axial channels 22 and lock point 23 and outer ring 1 and the lock point 12, this design had both guaranteed the matching requirements of bearing, had solved the sequence of sanqu songs within a particular musical mode problem of bearing simultaneously again; Radially can make things convenient for roller 6 and packing into of retainer 7 radially between raceway 13a and outer ring 1 raceway 13, make bearing can bear higher radial load; Erection opening 26 on the large end face 24 is convenient to bearing processing, the lifting when installing; Seal groove 27 cooperates with the seal groove 19 of outer ring 1 can make things convenient for packing into of black box 8; Mounting hole 28 on the inner ring 2 can conveniently connect with bolt on the generator unit stator, has the connecting hole 18a of the connecting hole 18 and second inner ring 3 to play anastomosis on the small end face 25; Aperture surface respectively has two row oil hole 20a and oil outlet 21a up and down, and oil hole 20a is beneficial to the lubricated of bearing for bearing provides fresh grease, and oil outlet 21a makes things convenient for the discharge of waste oil.

As shown in Figure 5: can make things convenient for packing into of steel ball 4 between the raceway groove 11a of second inner ring, 3 axial channels 22a and lock point 23a and outer ring 1 and the lock point 12a, this design had both guaranteed the matching requirements of bearing, had solved the sequence of sanqu songs within a particular musical mode problem of bearing simultaneously again; Connecting hole 18a on the large end face 24a and 18 anastomosis of the connecting hole of inner ring 2; Erection opening 26a is convenient to bearing processing, the lifting when installing; Seal groove 27a cooperates with the seal groove 19a of outer ring 1 can make things convenient for packing into of black box; Have on the small end face 25a with inner ring 2 on mounting hole 28 corresponding mounting hole 28a; Aperture surface respectively has two row oil hole 20b and oil outlet 21b up and down, and oil hole 20b is beneficial to the lubricated of bearing for bearing provides fresh grease, and oil outlet 21b makes things convenient for the discharge of excessive fuel consumption.

As shown in Figure 6: the rolling surface of roller 6 has protrusion amount δ, radius is the complete protruding spheric structure of SR, under fully loaded transportation condition, it can utilize the length of roller 6 fully, makes stress distribution reach best, avoid roller 6 edges to produce the stress concentration phenomenon, improve the working life of bearing.

As accompanying drawing 7, shown in Figure 8: axial cage 5 is the structural type in pocket hole 29 of taking turns down on the whole, retainer 5 pocket holes 29 are designed to cylindrical body and the tangent structure of billiard table body, top, pocket hole 30 is cylindrical body, when assembling, bearing makes things convenient for packing into of steel ball 3, bottom, pocket hole 31 is that camber line contacts for the billiard table body with the rolling surface of steel ball 4, both controlled the sag of chain of retainer 5, guaranteed again that bearing rotated requirement flexibly, and made the running of bearing more steady.

As accompanying drawing 9, shown in Figure 10: radially retainer 7 is the structural type of whole S-shaped curve, and this structural design makes things convenient for packing into of roller 6, has reduced the difficulty of retainer 7 processing technologys and assembly technology; Cylindrical pocket hole 29a, but maximum area contains the rolling surface of roller, thus realize that bearing turns round safely and smoothly;

Lock point

32,33 on the inside and outside footpath of 29a, pocket hole, can pin the roller 6 in the retainer 7 pocket hole 29a that pack into up and down, and the bearing rotation flexibly, controlled the sag of chain of retainer 7 simultaneously again, make 14 contacts of retainer 7 discord lasso ribs produce friction, reduced frictional heating and noise.

As shown in Figure 11: black box 8 is the structural type of canvas filler rubber 34 and spring ring 35 combinations, the intensity of canvas filler rubber 34 with enhanced leaktightness is adopted on its top, the lip 36 of bottom adopts soft rubber to cooperate with inner ring 2, the seal groove 27 of second inner ring 3,27a, and spring encloses the effect of enhanced leaktightness performance.

Claims

1. combined bearing for main shafts of direct-drive wind generating sets, its part comprises outer ring (1), first inner ring (2), second inner ring (3), steel ball (4), axial cage (5), roller (6), radially retainer (7), black box (8), first inner ring (2) and second inner ring (3) are connected and fixed by bolt (9), the outer surface of outer ring (1) and first inner ring (2), second inner ring (3) is provided with anticorrosive coat (10), it is characterized in that: bearing contact angle α, α 1 are 15 °, the rolling element guiding; Described outer ring (1) is the structural type of T type, outer ring (1) inner shafts face up and down is respectively arranged with row's raceway groove (11a, 11), reach lock point (12a, 12), outer ring (1) aperture surface is provided with raceway (13) and two ribs (14), one of them rib is provided with dress roller breach (15), the end face of outer ring (1) be provided with erection opening (17), mounting hole (16) and seal groove (19,19a) outer ring external diameter face upper and lower have respectively one row oil hole (20) and one the discharge oilhole (21); First inner ring (2) be horizontally arranged with outer ring (1) inner shafts to following raceway (11), the lock the corresponding axial channels of point (12) (22) and the lock point (23), first inner ring (2) radially is provided with raceway (13a), erection opening (26), seal groove (27) and mounting hole (28) are arranged on its large end face (24), small end face (25) is provided with the connecting hole (18) that is connected with bolt (9), and first inner ring (2) aperture surface is upper and lower to have row's oil hole (20a) to discharge oilhole (21a) with one respectively; Second inner ring (3) axially be provided with outer ring (1) inner shafts upward raceway groove (11a), the lock the corresponding axial channels of point (12a) (22a) and the lock point (23a), bolt (9) connecting hole (18a), erection opening (26a) and seal groove (27a) are arranged on its large end face (24a), small end face (25a) is provided with and the corresponding mounting hole of first inner ring (2) mounting hole (28) (28a), the aperture surface of second inner ring (3) is upper and lower have respectively row's oil hole (20b) with and one discharge oilhole (21b); Described axial cage (5) is integral cage (5); Described radially retainer (7) is integral cage (7).

2. a kind of combined bearing for main shafts of direct-drive wind generating sets according to claim 1 is characterized in that: the complete protruding spheric structure of the rolling surface of described roller (6) for having protrusion amount (δ).

3. a kind of combined bearing for main shafts of direct-drive wind generating sets according to claim 1 is characterized in that: the pocket hole of described axial cage (5) is the structural type in the pocket hole (29) of taking turns up and down.

4. a kind of combined bearing for main shafts of direct-drive wind generating sets according to claim 1 is characterized in that: the structural type of the whole S-shaped curve of described radially retainer (7).

5. a kind of combined bearing for main shafts of direct-drive wind generating sets according to claim 1 is characterized in that: black box (8) is the structural type of canvas filler rubber (34) with spring ring (35) combination.

6. a kind of combined bearing for main shafts of direct-drive wind generating sets according to claim 3 is characterized in that: described axial cage (5) pocket hole (29) is billiard table body and the tangent structural type of cylindrical body.

7. a kind of combined bearing for main shafts of direct-drive wind generating sets according to claim 4 is characterized in that: described radially retainer (7) pocket hole (29a) is cylindrical structural type.