CN115163658A - Sliding main bearing, assembling method thereof and wind turbine generator transmission system - Google Patents
Sliding main bearing, assembling method thereof and wind turbine generator transmission system Download PDFInfo
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- CN115163658A CN115163658A CN202210866151.XA CN202210866151A CN115163658A CN 115163658 A CN115163658 A CN 115163658A CN 202210866151 A CN202210866151 A CN 202210866151A CN 115163658 A CN115163658 A CN 115163658A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/10—Sliding-contact bearings for exclusively rotary movement for both radial and axial load
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C43/00—Assembling bearings
- F16C43/02—Assembling sliding-contact bearings
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Abstract
The invention discloses a sliding main bearing, an assembling method and a wind turbine generator transmission system, wherein the sliding main bearing comprises a bearing body and a thrust tile, the bearing body is provided with a conical inner cavity, the thrust tile is arranged in the conical inner cavity and movably connected to the wall of the conical inner cavity, and one end of the thrust tile, which is close to the large-diameter end of the conical inner cavity, is inclined outwards relative to one end of the thrust tile, which is far away from the large-diameter end of the conical inner cavity, along the radial direction of the conical inner cavity; the thrust pads are a plurality of, and a plurality of thrust pads encircle the axis arrangement of bearing body, and a plurality of thrust pads enclose the toper shaft cavity, and this toper shaft cavity and main shaft adaptation. In the invention, the thrust bearing shoe is movably connected with the cavity wall of the conical inner cavity of the bearing body, so that the thrust bearing shoe can swing according to the motion state of the main shaft to realize the adjustment of the optimal bearing state. And the thrust pads which are arranged in an inclined mode can provide axial bearing and radial bearing at the same time, so that the sliding main bearing is suitable for the working condition that the load is complex and variable.
Description
Technical Field
The invention relates to the field of bearings in a wind turbine transmission system, in particular to a sliding main bearing and an assembling method thereof, and a wind turbine transmission system.
Background
When the rolling bearing is adopted in the transmission system of the wind turbine generator, the problems and the technical bottlenecks of low power density, large radial size, high cost, high failure rate of the rolling bearing, difficult maintenance, high requirement on the manufacturing process and the like exist. Compared with the prior art, the sliding bearing has the advantages of small radial size, strong bearing capacity, low cost and the like, and can replace a rolling bearing to be applied to a transmission system of a wind turbine generator. The wind turbine generator main shaft of the wind turbine generator transmission system is arranged in the sliding main bearing, but the main shaft in the wind turbine generator transmission system simultaneously bears axial and radial loads, and the load working condition is complicated and changeable, so that the sliding main bearing sleeved outside the main shaft needs to bear complicated and changeable load working conditions, and needs to be frequently started and stopped. The existing sliding main bearing is difficult to meet the use requirement of a main shaft in a transmission system of a wind turbine generator.
Disclosure of Invention
The invention aims to design a sliding main bearing to meet the use requirement of a main shaft in a transmission system of a wind turbine generator. In order to achieve the purpose, the invention provides the following technical scheme:
a sliding main bearing comprising a bearing body having a tapered internal cavity and a thrust shoe disposed in the tapered internal cavity and operatively connected to a wall of the tapered internal cavity, an end of the thrust shoe proximal to a major diameter end of the tapered internal cavity being inclined radially outwardly of the tapered internal cavity relative to an end distal to the major diameter end of the tapered internal cavity;
the thrust pads are multiple, are multiple the thrust pad encircles the axis of bearing body arranges, and is multiple the thrust pad encloses the toper shaft cavity, and this toper shaft cavity and main shaft adaptation.
Preferably, the distance between the side walls of the thrust shoe on both sides in the circumferential direction of the bearing body is gradually reduced from the large-diameter end to the small-diameter end of the tapered inner cavity.
Preferably, a clamping protrusion is arranged on the cavity wall of the conical inner cavity, a clamping groove is arranged on the thrust pad, the clamping groove is matched with the clamping protrusion to prevent the thrust pad from being separated from the bearing body, and an installation gap is formed between the clamping groove and the clamping protrusion.
Preferably, the clamping protrusions comprise a first clamping protrusion and a second clamping protrusion, the first clamping protrusion is arranged between two adjacent thrust pads, and the second clamping protrusion protrudes inwards along the radial direction from the cavity wall of the large-diameter end of the conical inner cavity;
one end of the thrust shoe, which corresponds to the large-diameter end of the conical inner cavity, is blocked by the second clamping protrusion;
the draw-in groove includes the side draw-in groove, the side draw-in groove sets up on the lateral wall of thrust tile, at least some card of first calorie of protruding is gone into in the side draw-in groove, being close to of side draw-in groove the one end of the big footpath end of toper inner chamber has the groove end wall, the side draw-in groove with the wall that the groove end wall is adjacent is the groove lateral wall, the groove end wall with the groove lateral wall all can receive the protruding blockking of first calorie.
Preferably, the first clamping protrusion is a limiting screw, the limiting screw is screwed on the cavity wall of the conical cavity, and one side of a nut of the limiting screw is clamped into the side clamping groove.
Preferably, the clamping groove further comprises an end clamping groove, the end clamping groove is arranged at the end part, close to the large-diameter end of the tapered inner cavity, of the thrust shoe, the end clamping groove is opposite to the second clamping protrusion to form a semi-surrounding structure, one groove wall of the end clamping groove is matched with the end wall of the second clamping protrusion to form a blocking structure, and the other groove wall of the end clamping groove axially covers the inner ring wall of the second clamping protrusion along the bearing body.
Preferably, the cavity wall of the conical inner cavity is radially and outwardly recessed to form a first mounting groove, an inner balance block is arranged in the first mounting groove, the inner side surface of the inner balance block is in contact with the thrust shoe, the number of the inner balance blocks is multiple, the multiple inner balance blocks are arranged around the axis of the bearing body, and each inner balance block is in contact with one thrust shoe;
the bearing body is provided with a second mounting groove, the second mounting groove is opposite to the axis of the bearing body, which is far away from the first mounting groove, the second mounting groove is communicated with the first mounting groove, an outer balance block is arranged in the second mounting groove, the outer balance block is a plurality of, optionally adjacent two outer side surfaces of the inner balance block are in contact with one outer balance block, and the circumferential direction of the bearing body is arranged along the plurality of outer balance blocks.
Preferably, the first mounting grooves are arranged around the axis of the bearing body at intervals, and each first mounting groove is internally provided with one internal balance block;
the second mounting groove is an annular groove formed around the axis of the bearing body, and the outer balance blocks are arranged in the second mounting groove at intervals.
Preferably, a positioning bolt is connected to a groove ring wall of the large-diameter end, far away from the tapered inner cavity, of the second mounting groove, and a rod hole in clearance fit with a screw rod of the positioning bolt is arranged in the outer balance block.
Preferably, the second mounting groove has a notch radially outward of the bearing body, and the notch of the second mounting groove is blocked by an adjusting pad attached to the bearing body.
Preferably, the thrust shoe is in contact with the inner balance weight through a protrusion, and the protrusion is spherical or hemispherical.
Preferably, the protrusion is formed on the thrust outer weight or the inner weight.
The invention further provides a wind turbine generator transmission system which comprises any one of the sliding main bearings, wherein the sliding main bearings are arranged in pairs, and the two sliding main bearings in pairs are oppositely arranged or oppositely arranged.
The present invention also provides a method of assembling a sliding main bearing, comprising: the bearing body comprises an upper half bearing body and a lower half bearing body, wherein 2+2n thrust pads are mounted in the bearing body, and n is more than or equal to 1;
the thrust bearing is installed along one circumferential direction of the bearing body in a mode of firstly installing a limit screw and then installing a thrust bearing shoe, the thrust bearing shoe is slid in place along the circumferential direction of the lower half bearing body or the upper half bearing body during installation, and meanwhile, a nut of the limit screw is ensured to be clamped into a side clamping groove of the thrust bearing shoe;
after the nth thrust pad is installed on the lower half bearing body or the upper half bearing body, the (n + 1) th limit screw is installed again, then the main shaft is installed in the lower half bearing body, then the main shaft is installed along the circumferential direction of the lower half bearing body is arranged on the two sides of the lower half bearing body, the two thrust pads are respectively pushed on the two sides of the lower half bearing body, the side clamping grooves of the two thrust pads are ensured to be respectively clamped into nuts of the (1) th limit screw and the (n + 1) th limit screw, and then the upper half bearing body is buckled on the lower half bearing body.
According to the technical scheme, the thrust bearing shoe is movably connected with the cavity wall of the conical inner cavity of the bearing body, so that the thrust bearing shoe can swing according to the motion state of the main shaft, and the optimal bearing state adjustment is realized. And the thrust pads which are obliquely arranged can provide axial bearing and radial bearing simultaneously, so that the sliding main bearing disclosed by the invention is suitable for the working condition of complex and variable load, and meets the use requirement of a main shaft in a transmission system of a wind turbine generator.
Drawings
In order to more clearly illustrate the solution of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without inventive efforts.
FIG. 1 is an exploded view of a sliding main bearing according to an embodiment of the present invention;
FIG. 2 is a schematic view of the overall structure of a sliding main bearing according to an embodiment of the present invention;
FIG. 3 is a schematic view of an assembly of a thrust pad and a bearing body according to an embodiment of the present invention;
FIG. 4 is a schematic view of another angle of FIG. 3;
FIG. 5 is an assembly view of an inner weight and an outer weight according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of the overall construction of a sliding main bearing mounted in a back-to-back orientation according to an embodiment of the present invention;
FIG. 7 is a cross-sectional view of FIG. 6;
FIG. 8 is a schematic view of the overall structure of a sliding main bearing installed in opposite directions according to an embodiment of the present invention;
fig. 9 is a cross-sectional view of fig. 8.
Wherein, 1 is a limit screw, 2 is a thrust shoe, 3 is an inner balance block, 4 is a bearing body, 5 is an outer balance block, 6 is a positioning bolt, 7 is an adjusting pad, 8 is a locking screw, 9 is a sliding main bearing, 10 is a main shaft for back combination, 11 is a bearing cover for back combination, 12 is a bearing seat for back combination, 13 is a main shaft for opposite combination, 14 is a bearing cover for opposite combination, 15 is a bearing seat for opposite combination, 16 is a fixing bolt, 17 is a conical inner cavity, 18 is a side clamping groove, 19 is a second clamping protrusion, and 20 is an end clamping groove.
Detailed Description
The invention discloses a sliding main bearing which can meet the use requirement of a main shaft in a transmission system of a wind turbine generator. The invention also discloses an assembling method of the sliding main bearing and a transmission system of the wind turbine generator.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 2, fig. 7 and fig. 9, the invention discloses a sliding main bearing 9, wherein the sliding main bearing 9 comprises a bearing seat and a sliding main bearing 9, and the sliding main bearing 9 is arranged in the bearing seat. The sliding main bearing 9 comprises in particular a bearing body 4 and a thrust shoe 2. The bearing body 4 is provided with a conical inner cavity 17, the thrust pad 2 is arranged in the conical inner cavity 17, and the thrust pad 2 is movably connected on the cavity wall of the conical inner cavity 17. Another feature of the thrust shoe 2 is that one end of the thrust shoe 2 close to the large diameter end of the tapered inner cavity 17 is inclined outward in the radial direction of the tapered inner cavity 17 relative to the end far from the large diameter end of the tapered inner cavity 17, and the plurality of thrust shoes 2 surround a tapered axial cavity around the axis of the bearing body 4, and the tapered axial cavity is adapted to a main shaft in a transmission system of a wind turbine.
In the invention, the thrust pad 2 is movably connected with the cavity wall of the conical inner cavity 17 of the bearing body 4, so that the thrust pad 2 can swing according to the motion state of the main shaft to realize the adjustment of the optimal bearing state. In addition, the thrust pads 2 which are obliquely arranged can provide axial bearing and radial bearing at the same time, so that the sliding main bearing 9 disclosed by the invention is suitable for the working condition of complex and variable load and meets the use requirement of a main shaft in a transmission system of a wind turbine generator.
For balancing the load, the present invention defines that the distance between the side walls of the thrust shoe 2 on both sides, i.e., both sides of the thrust shoe 2 in the circumferential direction of the bearing body 4, is gradually reduced from the large-diameter end to the small-diameter end of the tapered inner cavity 17. By such a design, the gap between two thrust shoes 2 adjacent in the circumferential direction of the bearing body 4 can be ensured to be uniform, so that the thrust shoes 2 are ensured to be loaded in a balanced manner.
From the above description, it can be seen that the thrust shoe 2 is movably connected with the bearing body 4, and in an embodiment of the present invention, the thrust shoe 2 is movably connected with the cavity wall of the tapered inner cavity 17 by means of a snap-fit connection. Specifically, set up the card protruding on the chamber wall of toper inner chamber 17, set up the draw-in groove on thrust tile 2, draw-in groove and the protruding cooperation of card are in order to prevent that thrust tile 2 breaks away from bearing body 4. In order to realize that the thrust shoe 2 can move relative to the cavity wall of the conical inner cavity 17, the embodiment limits a certain installation gap between the clamping convex on the cavity wall of the conical inner cavity 17 and the clamping groove on the thrust shoe 2.
Regarding the movable clamping mode of the thrust shoe 2 and the cavity wall of the conical inner cavity 17, a universal ball joint can be adopted for realizing, namely, a ball hole is processed on the surface of the thrust shoe 2 facing the cavity wall of the conical inner cavity 17, the universal ball joint is arranged on the cavity wall of the conical inner cavity 17 and is matched in the ball hole, so that the mutual connection between the thrust shoe 2 and the cavity wall of the conical inner cavity 17 is ensured, and meanwhile, the thrust shoe 2 can swing in any direction relative to the cavity wall of the conical inner cavity 17 to adapt to the unbalance loading of the spindle in a self-balancing manner.
Referring to fig. 3 and 4, in an embodiment of the present invention, the engagement between the thrust shoe 2 and the wall of the tapered inner cavity 17 is designed as follows: the clamping protrusions comprise a first clamping protrusion and a second clamping protrusion 19, the first clamping protrusion is arranged on the side portion of each thrust pad 2 and located between every two adjacent thrust pads 2. The second clamping projection 19 protrudes from the wall of the large-diameter end of the conical inner cavity 17 radially inwards or towards the center of the conical inner cavity 17, and the second clamping projection 19 is of an annular structure.
The large end of the thrust shoe 2 corresponding to the large diameter end of the tapered inner cavity 17 is blocked by the second catching protrusion 19, so that the thrust shoe 2 cannot be separated from the bearing body 4 from the second catching protrusion 19.
The snap groove in this embodiment includes a side snap groove 18, and the side snap groove 18 is provided on a side wall of the thrust shoe 2, which is a side wall in the circumferential direction of the bearing body 4 of the thrust shoe 2. At least a portion of the first protrusion on one side of the side card slot 18 is snapped into the side card slot 18. The end of the side pockets 18 adjacent the large diameter end of the tapered bore 17 has a pocket end wall and the wall of the side pockets 18 adjacent the pocket end wall is a pocket side wall. The groove end wall and the first snap projection form a stop so that the thrust shoe 2 cannot be removed from the bearing body 4 in a direction away from the large diameter end of the conical interior 17. The groove side wall of the side clamping groove 18 and the first clamping protrusions form blocking, the two sides of one thrust bush 2 are provided with the side clamping grooves 18, the groove side walls of the two side clamping grooves 18 are respectively under the blocking effect of the two first clamping protrusions, and therefore the thrust bush 2 cannot push the bearing body 4 in the radial direction of the bearing body 4. The groove end wall and the groove side wall of the first catching groove and the side catching groove 18 have a mounting gap therebetween, so that the thrust shoe 2 can swing within a certain range.
The first clamping bulge is preferably a limiting screw 1, and the limiting screw 1 is screwed on the wall of the conical cavity. A limit screw 1 is arranged between the two thrust pads 2, and two sides of a nut of the limit screw 1 are respectively clamped into two side clamping grooves 18 of the two thrust pads 2.
The clamping groove in the embodiment of the present invention includes an end clamping groove 20 in addition to the side clamping groove 18, and the end clamping groove 20 is disposed at the end of the thrust shoe 2 close to the large diameter end of the tapered inner cavity 17. The end engaging groove 20 is substantially L-shaped and forms a half-enclosure for the second engaging protrusion 19. One groove wall of the end groove 20 cooperates with the end wall of the second detent 19 to form a stop to prevent the thrust shoe 2 from passing over the second detent 19. The other groove wall of the end clamping groove 20 covers the inner annular wall of the second clamping protrusion 19 along the axial direction of the bearing body 4, and the arrangement can ensure that the spindle is in contact with the thrust shoe 2 and is not in direct contact with the second clamping protrusion 19 on the bearing body 4. Similarly, at the small diameter end of the conical inner cavity 17, the thrust pad 2 extends out of the conical inner cavity 17 to prevent the main shaft from directly contacting the wall of the conical inner cavity 17.
In order to prevent the cavity wall of the conical inner cavity 17 from obstructing the swinging of the thrust shoe 2 when the thrust shoe 2 is self-balanced, the embodiment of the invention limits the contact between the thrust shoe 2 and the cavity wall of the conical inner cavity 17 through a protrusion, and the protrusion is spherical or hemispherical or similar to a sphere. This ensures that the thrust shoe 2 is in general point contact with the wall of the conical cavity 17 to ensure oscillation of the thrust shoe 2 in any direction.
The protrusions can be arranged on the tile surface of the thrust tile 2 facing the conical inner cavity 17 and also on the cavity wall of the conical inner cavity 17.
Referring to fig. 4, fig. 5, fig. 7 and fig. 8, the load balancing feature of the thrust pad 2 will be described as follows: a first mounting groove is formed on the wall of the conical inner cavity 17, and is formed by being recessed outward in the radial direction of the conical inner cavity 17. An inner balance block 3 is arranged in the first mounting groove, and the inner side surface of the inner balance block 3, or the side surface of the inner balance block 3 facing the thrust pad 2, is in contact with the thrust pad 2. The internal balance weight 3 is a plurality of internal balance weights 3, the plurality of internal balance weights 3 are uniformly arranged around the axis of the bearing body 4, and each internal balance weight 3 is in contact with one thrust shoe 2.
Still be provided with the second mounting groove on the bearing body 4, the axis of bearing body 4 is kept away from for first mounting groove to the second mounting groove, perhaps can understand that the diameter of the ring at second mounting groove place is greater than the diameter of the ring at first mounting groove place. The second mounting groove is communicated with the first mounting groove. An outer balance weight 5 is arranged in the second mounting groove, and the outer balance weights 5 are uniformly arranged along the circumferential direction of the bearing body 4. The outer side surfaces of any two adjacent inner balance weights 3 are in contact with one outer balance weight 5.
As shown in fig. 5, the two thrust shoes 2 are supported by two inner counterbalances 3, respectively, and the two inner counterbalances 3 are supported by one outer counterbalance 5. When the load of the left thrust shoe 2 is increased, the load on the left thrust shoe 2 can be transmitted to the right thrust shoe 2 through the left inner balance weight 3, the outer balance weight 5 and the right inner balance weight 3 in sequence, so that the right thrust shoe 2 balances the load of the left thrust shoe 2. Because arbitrary one interior balancing piece 3 supports by two outer counterbalances 5 respectively with the adjacent interior balancing piece 3 of controlling, consequently the load of arbitrary one thrust tile 2 can be transmitted other thrust tiles 2 along anticlockwise and clockwise respectively to make other thrust tiles 2 balanced arbitrary one thrust tile 2. Therefore, the overload of one thrust pad 2 is avoided, and the service life of the thrust pad 2 is prolonged.
The first mounting grooves are a plurality of first mounting grooves which are arranged at intervals around the axis of the bearing body 4, each first mounting groove is internally provided with one internal balance block 3, and the internal balance blocks 3 can be limited in the respective first mounting grooves by the arrangement, so that the one-to-one corresponding relation between the thrust pads 2 and the internal balance blocks 3 is maintained.
The second mounting groove is an annular groove formed around the axis of the bearing body 4, or it can be understood that the second mounting groove is a through groove in the circumferential direction. A plurality of external weights 5 are arranged at intervals in the second mounting groove. The second mounting groove that leads to the groove structure can greatly simplify the structure for a plurality of second mounting grooves of interval arrangement to reduce the processing degree of difficulty. In addition, the second mounting groove of the through groove structure allows the outer balance weight 5 to swing to a larger extent, thereby being beneficial to transferring load.
In order to avoid that the external balance weights 5 generate larger displacement to destroy the relation of one external balance weight 5 corresponding to two internal balance weights 3, the invention is also provided with a positioning bolt 6. The second mounting groove is provided with two opposite groove annular walls, the positioning bolt 6 is arranged on one groove annular wall far away from the large-diameter end of the conical inner cavity 17, and a rod hole in clearance fit with a screw rod of the positioning bolt 6 is arranged in the outer balance block 5. Referring to fig. 4, the outer balance weight 5 can swing left and right around the axis of the positioning bolt 6 to transmit load to the inner balance weight 3, and the positioning bolt 6 limits the circumferential sliding of the outer balance weight 5 along the tapered inner cavity 17.
As can be seen from the above description, the thrust pad 2 is disposed obliquely, and then the inner balance weight 3, the first mounting groove, the outer balance weight 5, and the second mounting groove are also disposed obliquely.
For ease of assembly, the present invention provides a notch on the second mounting groove, which is open radially outward of the bearing body 4. When the outer balance weight 5 is installed, the outer balance is put into the second installation groove through the notch. The notch of the second installation groove is then covered with an adjusting pad 7, and the adjusting pad 7 can be locked to the bearing body 4 by means of a locking screw 8.
From the above description, it can be seen that the thrust shoe 2 makes point contact with the cavity wall of the tapered inner cavity 17 through the protrusion, in the embodiment of the present invention, the thrust shoe 2 makes point contact with the inner balance block 3 through the protrusion, and the inner balance block 3 can be regarded as a part of the cavity wall of the tapered inner cavity 17. The protrusions are formed on the inner balance block 3 or on the thrust pad 2.
The invention also discloses a wind turbine generator transmission system, which comprises the sliding main bearing 9, wherein the sliding main bearing 9 is any one of the sliding main bearings 9, the sliding main bearing 9 has the effect, and the wind turbine generator transmission system with the sliding main bearing 9 also has the effect, so that the details are not repeated herein.
In the embodiment of the present invention in which the sliding main bearings 9 are provided in pairs, the two sliding main bearings 9 in the pair may be installed in opposite directions as shown in fig. 8 and 9, or in opposite directions as shown in fig. 6 and 7. Two sliding main bearings 9 arranged oppositely when installed oppositely are installed in an opposite combination bearing seat 15, an opposite combination bearing cap 14 is buckled on the opposite combination bearing seat 15 and locked by a fixing bolt 16, and a main shaft matched with the opposite sliding main bearings 9 is an opposite combination main shaft 13. Two sliding main bearings 9 which are arranged in a back direction during back direction installation are installed in a back direction combination bearing seat 12, a back direction combination bearing cover 11 is buckled on the back direction combination bearing seat 12 and locked by a fixing bolt 16, and a main shaft matched with the back direction arrangement sliding main bearings 9 is a back direction combination main shaft 13.
The invention also discloses a method for assembling the sliding main bearing 9, which comprises the following steps: the bearing body 4 comprises an upper half bearing body and a lower half bearing body, 2+2n thrust shoes are mounted in the bearing body 4, and n is larger than or equal to 1.
The thrust bearing bush is installed along the circumferential direction of the bearing body 4 in a mode of firstly installing the limit screw 1 and then installing the thrust bearing bush 2, the thrust bearing bush 2 slides in place along the circumferential direction of the lower half bearing body or the upper half bearing body during installation, and meanwhile the nut of the limit screw 1 is guaranteed to be clamped into the side clamping groove 18 of the thrust bearing bush 2.
After the nth thrust bearing bush 2 is installed on the lower half bearing body or the upper half bearing body, the (n + 1) th limit screw 1 is installed again, the main shaft is installed in the lower half bearing body, then the two thrust bearing bushes 2 are pushed respectively from the two sides of the lower half bearing body along the circumferential direction of the lower half bearing body, the side clamping grooves 18 of the two thrust bearing bushes 2 are ensured to be clamped into the nuts of the 1 st limit screw 1 and the (n + 1) th limit screw 1 respectively, and then the upper half bearing body is buckled on the lower half bearing body.
Referring to fig. 4, in the embodiment of the present invention, 8 thrust pads 2 are disposed in the bearing body 4, and during assembly, the thrust pads 2 and the limit screws 1 are installed in the upper half bearing body or the lower half bearing body in a manner of first one limit screw 1 and then one thrust pad 2. Taking the lower half bearing body in fig. 4 as an example, the lower half bearing body is sequentially installed from right to left, the first limit screw 1 is firstly screwed into the cavity wall of the lower half bearing body, then the first thrust pad 2 slides in from the left side of the first limit screw 1 along the circumferential direction, the left side of the nut of the first limit screw 1 is ensured to be clamped into the side clamping groove 18 on the right side of the first thrust pad 2, the second limit screw 1 is screwed into the cavity wall of the lower half bearing body, and meanwhile, the right side of the second limit screw 1 is ensured to be clamped into the side clamping groove 18 on the left side of the first thrust pad 2. Then, the second limit screw 1 slides into the second thrust shoe 2 from the left side, so that the left side of the second limit screw 1 enters the side slot 18 on the right side of the second thrust shoe 2. The third limit screw 1 is installed, and the right side of the nut of the third limit screw 1 enters the side clamping groove 18 on the left side of the second thrust shoe 2. And the third thrust pad 2 is slid into the third limit screw 1 from the left side, so that the left side of the nut of the third limit screw 1 is clamped into the side clamping groove 18 on the right side of the third thrust pad 2. The fourth limit screw 1 is installed to ensure that the right side of the nut of the fourth limit screw 1 is clamped into the side clamping groove 18 at the left side of the third thrust shoe 2. Then, a main shaft is arranged in the lower half bearing body, then the two thrust pads 2 slide into the two sides of the lower half bearing body respectively, and the side clamping grooves 18 of the two thrust pads 2 are respectively clamped with the right side of the nut of the first limit screw 1 and the left side of the nut of the fourth limit screw 1. The other three thrust pads 2 are arranged on the upper half bearing body, and the upper half bearing body is buckled on the lower half bearing body, so that the complete sliding main bearing 9 is assembled. The sliding main bearing 9 is arranged on a bearing seat, an upper bearing cover is buckled on the bearing seat and locked by a fixing bolt 16, and therefore the complete sliding main bearing 9 is formed.
Finally, it should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (14)
1. A sliding main bearing comprising a bearing body having a tapered interior cavity and a thrust shoe disposed in the tapered interior cavity and operably connected to a wall of the tapered interior cavity, wherein an end of the thrust shoe proximate a major diameter end of the tapered interior cavity is angled outwardly in a radial direction of the tapered interior cavity relative to an end of the thrust shoe distal the major diameter end of the tapered interior cavity;
the thrust pads are arranged around the axis of the bearing body and surround a conical shaft cavity, and the conical shaft cavity is matched with the spindle.
2. The sliding main bearing of claim 1 wherein said thrust pad tapers in distance between said sidewalls on opposite sides of said bearing body in a circumferential direction from a major diameter end to a minor diameter end of said tapered bore.
3. The sliding main bearing of claim 1 wherein said tapered cavity has a detent formed on a wall of said cavity and said thrust pad has a detent formed thereon, said detent cooperating with said detent to prevent said thrust pad from disengaging said bearing body, said detent having a mounting clearance from said detent.
4. The sliding main bearing of claim 3 wherein said tangs comprise first tangs disposed between adjacent thrust pads and second tangs projecting radially inwardly from the wall of the larger diameter end of said tapered cavity;
one end of the thrust shoe, which corresponds to the large-diameter end of the conical inner cavity, is blocked by the second clamping protrusion;
the draw-in groove includes the side draw-in groove, the side draw-in groove sets up on the lateral wall of thrust tile, at least some card of first calorie of arch is gone into in the side draw-in groove, being close to of side draw-in groove the one end of the major diameter end of toper inner chamber has the groove end wall, the side draw-in groove with the wall that the groove end wall is adjacent is the groove lateral wall, the groove end wall with the groove lateral wall all can receive blockking of first calorie of arch.
5. The sliding main bearing according to claim 4, wherein said first snap projection is a limit screw screwed onto the cavity wall of said conical cavity, wherein one side of the nut of said limit screw is snapped into said side snap groove.
6. The sliding main bearing according to claim 4 wherein said snap groove further comprises an end snap groove disposed at an end of said thrust shoe adjacent to a large diameter end of said tapered bore, said end snap groove semi-surrounding said second snap protrusion, one groove wall of said end snap groove cooperating with an end wall of said second snap protrusion to form a stop, the other groove wall of said end snap groove axially covering an inner annular wall of said second snap protrusion along said bearing body.
7. The sliding main bearing of claim 1 wherein the walls of said tapered cavity are recessed radially outwardly to form a first mounting groove, an inner balance mass is disposed within said first mounting groove, an inner side surface of said inner balance mass is in contact with said thrust pads, said inner balance mass is a plurality of said inner balance masses disposed about the axis of said bearing body, each of said inner balance masses is in contact with one of said thrust pads;
the bearing body is provided with a second mounting groove, the second mounting groove is opposite to the axis of the bearing body, which is far away from the first mounting groove, the second mounting groove is communicated with the first mounting groove, an outer balance block is arranged in the second mounting groove, the outer balance block is a plurality of, optionally adjacent two outer side surfaces of the inner balance block are in contact with one outer balance block, and the circumferential direction of the bearing body is arranged along the plurality of outer balance blocks.
8. The sliding main bearing of claim 7 wherein said first mounting grooves are a plurality of spaced apart mounting grooves about the axis of said bearing body, one said internal weight being disposed in each of said first mounting grooves;
the second mounting groove is an annular groove formed around the axis of the bearing body, and the outer balance blocks are arranged in the second mounting groove at intervals.
9. The sliding main bearing of claim 8 wherein the second mounting groove has a retaining bolt attached to the groove ring wall distal to the large diameter end of the tapered bore and wherein the outboard counterweight has a rod bore therein that is clearance fit with the bolt shank of the retaining bolt.
10. The sliding main bearing of claim 8 wherein said second mounting groove has a radially outward notch along said bearing body, said notch of said second mounting groove being closed off by a spacer, said spacer being attached to said bearing body.
11. The sliding main bearing of claim 7 wherein said thrust shoe and said internal counter weight are in contact by a protrusion, said protrusion being spherical or semi-spherical.
12. The sliding main bearing of claim 11 wherein said protrusion is formed on either said thrust outer mass or said inner mass.
13. A wind turbine transmission system comprising sliding main bearings according to any of claims 1-12 arranged in pairs, with the two sliding main bearings in a pair being mounted opposite or facing away from each other.
14. A method of assembling a sliding main bearing, comprising: the bearing body comprises an upper half bearing body and a lower half bearing body, 2+2n thrust shoes are mounted in the bearing body, and n is more than or equal to 1;
the thrust bearing is installed along one circumferential direction of the bearing body in a mode of firstly installing a limit screw and then installing a thrust bearing shoe, the thrust bearing shoe is slid in place along the circumferential direction of the lower half bearing body or the upper half bearing body during installation, and meanwhile, a nut of the limit screw is ensured to be clamped into a side clamping groove of the thrust bearing shoe;
after the nth thrust pad is installed on the lower half bearing body or the upper half bearing body, the (n + 1) th limit screw is installed again, then the main shaft is installed in the lower half bearing body, then the lower half bearing body is circumferentially arranged along the two sides of the lower half bearing body are respectively pushed into the two thrust pads, the side clamping grooves of the two thrust pads are ensured to be respectively clamped into the nuts of the (1) th limit screw and the (n + 1) th limit screw, and then the upper half bearing body is buckled on the lower half bearing body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210866151.XA CN115163658A (en) | 2022-07-22 | 2022-07-22 | Sliding main bearing, assembling method thereof and wind turbine generator transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210866151.XA CN115163658A (en) | 2022-07-22 | 2022-07-22 | Sliding main bearing, assembling method thereof and wind turbine generator transmission system |
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| CN115163658A true CN115163658A (en) | 2022-10-11 |
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| CN202210866151.XA Pending CN115163658A (en) | 2022-07-22 | 2022-07-22 | Sliding main bearing, assembling method thereof and wind turbine generator transmission system |
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| CN111396455A (en) * | 2020-04-27 | 2020-07-10 | 杭齿传动(安徽)有限公司 | Wind power generation main shaft system |
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| CN214837803U (en) * | 2021-07-01 | 2021-11-23 | 浙江彰贵轴承科技有限公司 | Tilting thrust pad |
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| US5254893A (en) * | 1992-01-30 | 1993-10-19 | Ide Russell D | Shaft support assembly for use in a polygon mirror drive motor |
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