JP4101844B2 - Bearing built-in jig, tapered roller bearing, method of assembling tapered roller bearing and main shaft support structure of wind power generator - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a bearing built-in jig, a tapered roller bearing, a method of assembling a tapered roller bearing, and a main shaft support structure of a wind power generator. The present invention relates to a bearing, a method for incorporating the same, and a main shaft support structure for a large-scale wind power generator.

  The roller bearing is generally composed of an outer ring, an inner ring, a plurality of rollers disposed between the outer ring and the inner ring, and a cage that holds the plurality of rollers. There are various types of cages for holding rollers, such as resin cages, press cages, shaving cages, and welded cages, depending on the material and manufacturing method. ing. In addition, the cage is usually composed of a single piece, that is, an annular part.

  A roller bearing that supports a main shaft of a wind power generator to which a blade for receiving wind is attached needs to receive a large load, so that the roller bearing itself is also large. If it does so, each structural member which comprises a roller bearing, such as a roller and a holder | retainer, will also become large sized, and production and assembly of a member will become difficult. In such a case, if each member can be divided, production and assembly are facilitated.

  Here, a technique relating to a split type retainer in which a retainer included in a roller bearing is divided by a dividing line extending in a direction along the axis is disclosed in European Patent Publication No. 1408248A2 (Patent Document 1). FIG. 16 is a perspective view showing a cage segment which is a split type cage disclosed in Patent Document 1. FIG. Referring to FIG. 16, the cage segment 101a includes a plurality of pillar portions 103a, 103b, 103c, 103d, and 103e extending in a direction along the axis so as to form a plurality of pockets 104 that accommodate rollers, and a plurality of pillars. It has the connection parts 102a and 102b extended in the circumferential direction so that the parts 103a-103e may be connected.

FIG. 17 is a cross-sectional view showing a part of the roller bearing including the cage segment 101a shown in FIG. The configuration of the roller bearing 111 including the cage segment 101a will be described with reference to FIGS. 16 and 17. The roller bearing 111 holds an outer ring 112, an inner ring 113, a plurality of rollers 114, and a plurality of rollers 114. A plurality of cage segments 101a, 101b, 101c and the like. The plurality of rollers 114 are held by a plurality of cage segments 101a and the like in the vicinity of a PCD (Pitch Circle Diameter) 105 where the roller behavior is most stable. The cage segment 101a that holds the plurality of rollers 114 is continuously arranged so that the cage segments 101b and 101c having the same shape adjacent in the circumferential direction abut on the outermost pillar portions 103a and 103e in the circumferential direction. ing. A plurality of cage segments 101 a, 101 b, 101 c, etc. are connected to each other and incorporated into the roller bearing 111 to form one annular cage included in the roller bearing 111.
European Patent Publication EP1408248A2

  In general, when a large tapered roller bearing is incorporated into a rotary shaft extending in the vertical direction, first, the end surface on the large diameter side of the inner ring is disposed downward, and the tapered roller and the cage are disposed on the raceway surface of the inner ring. . And the inner ring | wheel with which the tapered roller and the holder | retainer are arrange | positioned is lifted with a crane etc., and it incorporates in a rotating shaft.

  Here, when the small-diameter side end face of the inner ring is suspended downward, the tapered rollers and the cage are dropped from the inner ring. In such a case, about the cage | basket comprised from one cyclic | annular component, falling off of a tapered roller etc. can be prevented by connecting and fixing an inner ring and a cage | basket. However, the cage segments described above are divided in the circumferential direction, and each is an independent member. Then, in order to prevent the tapered rollers and the like from falling off, the inner ring and each cage segment must be connected and fixed, resulting in great labor. As a result, it becomes difficult to incorporate the inner ring in which the tapered rollers and the cage are arranged into the rotating shaft, and the productivity of the tapered roller bearing is deteriorated.

  An object of the present invention is to provide a bearing assembly jig in which the tapered roller bearing has an excellent assemblability.

  Another object of the present invention is to provide a tapered roller bearing with good assemblability.

  Still another object of the present invention is to provide a method for assembling a tapered roller bearing with good assemblability.

  Still another object of the present invention is to provide a main shaft support structure for a wind power generator with good productivity.

  A bearing built-in jig according to the present invention connects an inner ring, an outer ring, a tapered roller, a plurality of column portions extending in a direction along the axis so as to form a pocket for holding the tapered roller, and the plurality of column portions. In this way, a tapered roller bearing having a connecting portion extending in the circumferential direction and combining a plurality of cage segments sequentially arranged in the circumferential direction between the outer ring and the inner ring is incorporated in a rotary shaft extending in the vertical direction. Used for. Here, the bearing built-in jig includes a fixing member that connects and fixes the inner ring and the outer ring while maintaining the combined state.

  With this configuration, the inner ring and the outer ring are connected and fixed by the fixing member provided in the bearing mounting jig while maintaining the combined state. If it does so, arrangement | positioning of the several retainer segment which hold | maintains the several tapered roller arrange | positioned between an inner ring | wheel and an outer ring | wheel and several tapered rollers can also be stabilized. Therefore, even when the inner ring is lifted with the small-diameter side end face facing downward, the tapered roller and the cage segment do not fall off from the inner ring. As a result, the incorporation into the rotating shaft is improved.

  Here, the cage segment is a unit body obtained by dividing one annular cage by a dividing line extending in the direction along the axis so as to have at least one pocket for accommodating the rollers. A plurality of cage segments are connected to the roller bearing in a circumferential direction to form one annular cage.

  Preferably, the fixing member includes a first portion that is fixed to the inner ring and extends in the radial direction, and a second portion that extends in the axial direction from the outer end portion of the first portion and is fixed to the outer ring. By comprising in this way, an inner ring | wheel and an outer ring | wheel can be connected and fixed reliably by the 1st and 2nd part of a fixing member. Moreover, since such a shape is a comparatively simple shape, it can be manufactured at low cost.

  More preferably, the fixing member includes a bolt for fixing the first part to the inner ring and a fixing bar for fixing the second part to the outer ring. By doing so, the fixing member, the inner ring, and the outer ring can be connected and fixed more easily and reliably by the bolt and the fixing rod.

  More preferably, the fixing rod includes a ring portion for connecting a suspension line at one end thereof. By doing so, the inner ring and the outer ring fixed to the fixing member can be lifted by the hanging line connected to the annular portion.

  In another aspect of the present invention, the tapered roller bearing includes an inner ring including one end connecting portion connected and fixed to one end of the fixing member, and an outer ring including the other end connecting portion connected and fixed to the other end of the fixing member. An outer ring having a tapered roller, a plurality of column portions extending in a direction along the axis so as to form a pocket for holding the tapered roller, and a connecting portion extending in the circumferential direction so as to connect the plurality of column portions. And a plurality of cage segments arranged sequentially in the circumferential direction between the inner rings.

  Such a tapered roller bearing uses a first end connecting portion provided on the inner ring and a second end connecting portion provided on the outer ring to easily and reliably connect and fix the fixing member to the inner ring and the outer ring. can do.

  In still another aspect of the present invention, a method for incorporating a tapered roller bearing includes: an inner ring, an outer ring, a tapered roller, and a plurality of pillars extending in a direction along the axis so as to form a pocket for holding the tapered roller; And a tapered roller bearing having a connecting portion extending in the circumferential direction so as to connect the plurality of column portions, and a plurality of cage segments sequentially arranged in the circumferential direction between the outer ring and the inner ring. This is a method of incorporating a tapered roller bearing to be incorporated into a rotary shaft extending in the vertical direction. Here, as for the method of incorporating the tapered roller bearing, a fixing member for connecting and fixing the inner ring and the outer ring while maintaining the combined state is prepared, and a plurality of tapered rollers and a plurality of cage segments are provided between the inner ring and the outer ring. The tapered roller bearings are arranged to form a tapered roller bearing, the inner ring and the outer ring included in the tapered roller bearing are connected and fixed by a fixing member, and the tapered roller bearing having the inner ring and the outer ring connected and fixed is lifted and incorporated into the rotating shaft.

  With such a configuration, the fixing member can connect and fix the inner ring and the outer ring while maintaining the combined state, so that the tapered roller and the cage segment disposed between the inner ring and the outer ring are dropped. The tapered roller bearing can be lifted without any problem. Therefore, the tapered roller bearing can be easily and reliably incorporated into the rotating shaft.

  In still another aspect of the present invention, the main shaft support structure of the wind power generator includes a blade that receives wind power, a main end that is fixed to the blade, and that rotates together with the blade, and is incorporated in the housing so that the main shaft can rotate freely. And a supporting tapered roller bearing. Here, the tapered roller bearing includes an inner ring including one end connecting portion that is connected and fixed to one end of the fixing member, an outer ring including the other end connecting portion that is connected and fixed to the other end of the fixing member, a tapered roller, A plurality of pillars extending in the direction along the axis so as to form pockets for holding the tapered rollers, and a connecting part extending in the circumferential direction so as to connect the plurality of pillars; And a plurality of cage segments arranged sequentially in the direction.

  Since the main shaft support structure of such a wind power generator includes a tapered roller bearing with good assemblability, productivity is good.

  According to the present invention, the inner ring and the outer ring are connected and fixed by the fixing member provided in the bearing built-in jig while maintaining the combined state. If it does so, arrangement | positioning of the several retainer segment which hold | maintains the several tapered roller arrange | positioned between an inner ring | wheel and an outer ring | wheel and several tapered rollers can also be stabilized. Therefore, even when the inner ring is lifted with the small-diameter side end face facing downward, the tapered roller and the cage segment do not fall off from the inner ring. As a result, the incorporation into the rotating shaft is improved.

  In addition, such a tapered roller bearing can easily and reliably use the one end connecting portion provided on the inner ring and the other end connecting portion provided on the outer ring to securely connect the inner ring and the outer ring by the fixing member. Can be connected and fixed.

  In addition, such a method for incorporating a tapered roller bearing allows the inner ring and the outer ring to be connected and fixed with the fixing member while maintaining the combined state, so that the tapered roller disposed between the inner ring and the outer ring and the holding ring are held. The tapered roller bearing can be lifted without dropping the cage segment. Therefore, the tapered roller bearing can be easily and reliably incorporated into the rotating shaft.

  Moreover, since the main shaft support structure of such a wind power generator includes a tapered roller bearing with good assemblability, productivity is good.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a perspective view showing a cage segment 11a included in the tapered roller bearing according to the embodiment of the present invention. 3 is a cross-sectional view of the cage segment 11a shown in FIG. 2 taken along a plane that includes the line III-III in FIG. 2 and is perpendicular to the axis. FIG. 4 is a cross-sectional view of the cage segment 11a shown in FIG. 2 cut along a plane that passes through the center of the column 14a and is orthogonal to the circumferential direction. From the viewpoint of easy understanding, in FIGS. 3 and 4, the plurality of tapered rollers 12a, 12b, 12c held by the cage segment 11a are indicated by dotted lines. Moreover, PCD22 is shown with a dashed-dotted line.

  With reference to FIG. 2, FIG. 3 and FIG. 4, first, the structure of the cage segment 11a included in the tapered roller bearing will be described. The cage segment 11a has a shape in which one annular cage is divided by a dividing line extending in the direction along the axis so as to have at least one pocket for accommodating the rollers. The cage segment 11a includes four column portions 14a, 14b, 14c, and 14d extending in the direction along the axis so as to form pockets 13a, 13b, and 13c that hold the tapered rollers 12a, 12b, and 12c. A pair of connecting portions 15a and 15b extending in the circumferential direction so as to connect the four column portions 14a to 14d, and a pair of protruding portions 16a and 16b positioned in both ends in the axial direction and protruding in the circumferential direction. Including.

  The pair of connecting portions 15a and 15b and the pair of protrusions 16a and 16b are connected in the circumferential direction to form one annular cage when the plurality of cage segments 11a are incorporated in the tapered roller bearing. , Has a predetermined radius of curvature in the circumferential direction. Of the pair of connecting portions 15a and 15b and the pair of protruding portions 16a and 16b, the connecting portion 15a located on the small diameter side of the tapered rollers 12a to 12c and the curvature radius of the protruding portion 16a are larger on the large diameter side of the tapered rollers 12a to 12c. It is comprised smaller than the curvature radius of the connection part 15b and protrusion 16b which are located in.

  The pair of protrusions 16a and 16b accommodate the tapered rollers between the cage segment 11a and the other cage segment when the other cage segments and the end faces 21a and 21b are arranged in contact with each other. Form a pocket.

  Guide surfaces 17a, 17b, 17c, 17d, 18a, 18b, 18c, and 18d for guiding the rollers are provided on the inner and outer diameter sides of the column portions 14a to 14d located on both sides in the circumferential direction of the pockets 13a to 13c. ing. With this configuration, the cage segment serves as a roller guide, and movement of the cage segment 11a in the radial direction is restricted. On the outer diameter side and the inner diameter side of the column portions 14a to 14d, oil grooves 19 and 20 penetrating in the circumferential direction are provided in a shape recessed inward or outward in the radial direction at a central portion in the axial direction. The oil grooves 19 and 20 improve the circulation of the lubricant.

  Next, a spacer that is included in the tapered roller bearing according to the embodiment of the present invention and that adjusts the circumferential clearance such as the cage segment 11a that is continuous in the circumferential direction will be described. FIG. 5 is a perspective view of a spacer 26 included in the tapered roller bearing. The structure of the spacer 26 will be described with reference to FIG. 5. The spacer 26 includes end portions 27 a and 27 b located at both ends in the axial direction and a central portion 28 located between the end portions 27 a and 27 b. . The axial distance between the end portions 27a and 27b is the same as the axial distance between the pair of connecting portions 15a and 15b included in the cage segment 11a. In addition, oil grooves 30a and 30b penetrating in the circumferential direction are provided on the inner diameter surface side and the outer diameter surface side of the central portion 28.

  Next, the configuration of the tapered roller bearing including the cage segment 11a and the spacer 26 will be described. FIG. 6 is a schematic cross-sectional view of a tapered roller bearing 31 in which a plurality of cage segments 11a, 11b, 11c, 11d and the like and a spacer 26 are arranged in the circumferential direction as seen from the axial direction. FIG. 7 is an enlarged cross-sectional view of a portion indicated by VII in FIG. Here, since the cage segments 11b, 11c, and 11d have the same shape as the cage segment 11a, description thereof is omitted. In FIG. 6, the tapered rollers 34 held by the cage segment 11a and the like are omitted. In addition, here, among the plurality of cage segments 11a to 11d, the cage segment arranged first is the cage segment 11a, and the cage segment arranged last is the cage segment 11d.

  6 and 7, the tapered roller bearing 31 includes an outer ring 32, an inner ring 33, a tapered roller 34, a plurality of cage segments 11 a to 11 d, and a spacer 26. The cage segments 11a to 11d are sequentially arranged in the circumferential direction. Here, first, the cage segment 11a is arranged first, and then the cage segment 11b is arranged so as to contact the cage segment 11a. Thereafter, the cage segment 11c is arranged so as to contact the cage segment 11b, the cage segments are sequentially arranged, and finally the cage segment 11d is arranged. Here, between the two adjacent cage segments 11a, 11b, etc., the tapered roller 34 is disposed in the pocket 35a to be formed, except between the first cage segment 11a and the last cage segment 11d. Is done.

  Next, the arrangement state of the spacer 26 arranged between the first cage segment 11a and the last cage segment 11d will be described. FIG. 8 is an enlarged cross-sectional view of a portion indicated by VIII in FIG. Referring to FIGS. 6 and 8, the cage segments 11a and the like are successively arranged so as to contact each other, and a spacer 26 is formed in the gap 39 formed between the cage segment 11a and the cage segment 11d. Arrange. By doing so, the dimension of the last clearance 40 in the circumferential direction generated between the cage segment 11a and the spacer 26 can be easily set in a range. The last gap is the first cage segment when the cage segments 11a to 11d and the like are arranged without a gap on the circumference, and the last cage segment 11d and the spacer 26 are arranged without a gap. 11a and the maximum clearance between the first retainer segment 11a and the spacer 26 disposed between the last retainer segment 11d.

  The first cage segment refers to the cage segment that is placed first when the cage segments are sequentially arranged in the circumferential direction, and the last cage segment refers to the adjacent cage segment. The cage segments are arranged last when they are brought into contact with each other and sequentially arranged in the circumferential direction. When arranged in this manner, the gap generated between the first cage segment and the last cage segment is adjusted by the spacer so as to have an appropriate gap size. The spacer does not have a pocket for accommodating the roller, and is different from a cage segment having at least one pocket for accommodating the roller.

  Here, when the above-described tapered roller bearing 31 is a double-row tapered roller bearing, a method for incorporating the tapered roller bearing when the double-row tapered roller bearing is incorporated into the rotating shaft will be described. Here, a description will be given of a method for incorporating a double row tapered roller bearing in which double-sided tapered roller bearings are arranged so that the end surfaces on the small diameter side of the two inner rings face each other.

  First, the configuration of the double row tapered roller bearing will be described. FIG. 9 is a sectional view showing a double row tapered roller bearing according to an embodiment of the present invention. Referring to FIG. 9, double-row tapered roller bearing 41 includes an outer ring 42, two inner rings 43a and 43b arranged such that small-diameter side end faces 48a and 48b face each other, outer ring 42 and each inner ring 43a, A plurality of tapered rollers 44a, 44b disposed between the plurality of tapered rollers 44a, a plurality of cage segments 45a, 45b holding the respective tapered rollers 44a, 44b, and an inner ring disposed between the inner ring 43a and the inner ring 43b. And a seat 46.

  Of the two inner rings 43a and 43b, on the side of the large-diameter side end face 49a of one inner ring 43a, a screw hole 58 that is screwed into a bolt is provided as one end connecting portion. A plurality of screw holes 58 are also provided in the circumferential direction. Further, the outer ring 42 is provided with an outer ring through hole 59 that penetrates in the axial direction from one end face 50a to the other end face 50b as the other end connecting portion. A plurality of outer ring through holes 59 are provided in the circumferential direction. The double-row tapered roller bearing 41 has a configuration in which one inner ring 43a is disposed above the other inner ring 43b.

  FIG. 10 is a flowchart showing an outline of a procedure for incorporating the double-row tapered roller bearing 41 described above into the rotating shaft 47. With reference to FIG. 9 and FIG. 10, a method of incorporating the double row tapered roller bearing 41 according to the embodiment of the present invention will be described. First, a plurality of tapered rollers 44a held by the cage segments 45a are arranged on the raceway surface of the inner ring 43a with the large-diameter side end face 49a of one inner ring 43a facing downward. In this case, as described above, the plurality of cage segments 45a and 45b are arranged on the raceway surface of the inner ring 43a so as to be connected in the circumferential direction. Further, a spacer (not shown) is disposed between the first retainer segment and the last retainer segment. Similarly, the tapered roller 44b, the cage segment 45b, and the spacer are also arranged for the other inner ring 43b.

  About the inner ring | wheel 43b which has arrange | positioned the tapered roller 44b etc., the large-diameter side end surface 49b faces downward, and is integrated in the rotating shaft 47. As shown in FIG. In this case, since the tapered roller 44b is caught by the large collar of the inner ring 43b, there is no possibility that the tapered roller 44b, the cage segment 45b, and the spacer are dropped during assembly. Thereafter, the inner ring spacer 46 is assembled on the small diameter side end face 48b side of the inner ring 43b.

  For the inner ring 43a on which the tapered rollers 44a and the like are arranged, the outer ring 42 is arranged so that the raceway surface of the outer ring 42 abuts on the rolling surface of the tapered rollers 44a to form a tapered roller bearing (FIG. 10A). )).

  Next, among the tapered roller bearings including the inner ring 43a and the outer ring 42, the inner ring 43a and the outer ring 42 are connected and fixed while maintaining the combined state using the fixing member (FIG. 10B). Here, first, the configuration of a fixing member for connecting and fixing the inner ring 43a and the outer ring 42 will be described. FIG. 11 is a view showing a fixing member included in the bearing assembly jig according to the embodiment of the present invention. 9 and 11, the fixing member 51 includes a first portion 52 that is fixed to the large-diameter side end surface 49a of the inner ring 43a and extends in the radial direction, and extends in the axial direction from the outer end portion of the first portion 52. 42 and a second portion 53 fixed to the end surface 50a on the inner ring 43a side. The first portion 52 is provided with a first fixing member through hole 54 that exposes a screw hole 58 as one end connecting portion. The second portion 53 is provided with a second fixing member through hole 55 that exposes the outer ring through hole 59 as the other end connecting portion. The fixing member 51 has a substantially L-shaped cross section. Since such a shape is a relatively simple shape, it can be manufactured at low cost. The first fixing member through hole 54 is a long hole extending long in the radial direction of the bearing.

  FIG. 1 is a cross-sectional view when the fixing member 51 shown in FIG. 11 is connected and fixed to the large-diameter side end surface 49a of the inner ring 43a and one end surface 50a of the outer ring 42. 12 is a view of the fixing member 51 shown in FIG. 1 as viewed from the axial direction, that is, from the direction of the arrow XII in FIG. FIG. 1 shows a state in which the small diameter side end surface 48a of the inner ring 43a is directed downward.

  Referring to FIGS. 1, 11 and 12, inner ring 43 a abuts surface 56, on the side where second portion 53 extends, of first portion 52 of fixing member 51 and large-diameter side end surface 49 a. In such a way, they are connected and fixed. In this case, from the fixing member 51 side, the bolt 61 is inserted into the first fixing member through hole 54 and screwed into the screw hole 58 to be connected and fixed. The outer ring 42 is connected and fixed so that the surface 57 on the side extending in the axial direction from the outer end of the first portion 52 and the end surface 50a on the inner ring 43a side of the second portion 53 of the fixing member 51 are brought into contact with each other. Is done. In this case, the fixing rod 62 is inserted into the second fixing member through-hole 55 and the outer ring through-hole 59, and one end 60a protruding on the fixing member 51 side is stopped by the stopper 63a, and the other end surface 50b is inserted. The other end 60b protruding to the side is connected and fixed by being stopped by a nut 63b.

  By doing in this way, the outer ring 42 and the inner ring 43a can be connected and fixed while maintaining the combined state of the outer ring 42 and the inner ring 43a. Then, the arrangement of the plurality of tapered rollers 44a, the plurality of cage segments 45a, and the spacers arranged between the outer ring 42 and the inner ring 43a can be stabilized.

  An annular portion 64 to which a wire that is a lifting line can be connected is provided on one end portion 60a side of the fixing rod 62 that protrudes toward the fixing member 51 side.

  Here, since the first fixing member through hole 54 is a long hole extending in the radial direction of the bearing, the position in the radial direction of the screw hole 58 provided in the inner ring 43a and the shape and size of the tapered roller 44a. For example, the mounting position of the fixing member 51 can be adjusted and fixed. In addition, by fixing the fixing member 51, the inner ring 43a, and the outer ring 42 at such positions, the fixing member 51 does not interfere with the rotating shaft 47 and the like during assembly.

  In this way, the plurality of fixing members 51 are attached to the tapered roller bearing, and the inner ring 43a and the outer ring 42 are connected and fixed. In this case, since the inner ring 43a and the outer ring 42 are provided with a plurality of screw holes 58 and outer ring through-holes 59, an appropriate number of fixing members 51 are provided at appropriate positions depending on the lifted state and the weight of the tapered roller bearing. The inner ring 43a and the outer ring 42 are connected and fixed.

  Thereafter, a wire 65 for suspension is attached to the annular portion 64 of the fixed rod 62, and the tapered roller bearing is lifted (FIG. 10C). FIG. 13 is a view showing a state in which the tapered roller bearing is lifted in this case. Referring to FIG. 13, the wire 65 connected to the annular portion 64 of the plurality of fixing rods 62 is attached at one end to a hook 66 provided at the end of a crane (not shown). The tapered roller bearing is lifted upward by the crane.

  The hoisted tapered roller bearing is disposed on the other inner ring 43b that is previously incorporated in the rotary shaft 47. Specifically, it is arranged so that the rolling surface of the tapered roller 44b arranged on the raceway surface of the inner ring 43b and the other raceway surface of the outer ring 42 abut (FIG. 10D).

  By incorporating the double-row tapered roller bearing 41 into the rotating shaft 47 in this way, the cage segment or the like falls off when the tapered roller bearing is lifted even when the tapered roller bearing is lifted with the small-diameter side end surface 48a facing downward. There is no fear. Therefore, the double row tapered roller bearing 41 can be incorporated easily and reliably.

  In this case, bearing assembly jigs such as the fixing member 51 and the bolts 61 are not necessary after the double-row tapered roller bearing 41 is incorporated into the rotary shaft 47, and therefore are removed after the assembly.

  In the above embodiment, when the other inner ring 43b is incorporated in the rotation shaft 47, the plurality of tapered rollers 44b, the cage segments 45b and the spacers are arranged on the raceway surface of the inner ring 43b, and then the rotation shaft However, the present invention is not limited to this. First, after the inner ring 43b is incorporated in the rotating shaft 47, a plurality of tapered rollers 44b, a cage segment 45b, and a spacer may be arranged. By doing so, the tapered rollers 44b and the like can be reliably arranged on the raceway surface of the inner ring 43b.

  14 and 15 show an example of a main shaft support structure of a wind power generator in which a roller bearing according to an embodiment of the present invention is applied as a main shaft support bearing 75. FIG. The casing 73 of the nacelle 72 that supports the main components of the main shaft support structure is installed on the support base 70 via a swivel bearing 71 at a high position so as to be horizontally rotatable. A main shaft 76 that fixes a blade 77 that receives wind power to one end is rotatably supported in a casing 73 of the nacelle 72 via a main shaft support bearing 75 incorporated in a bearing housing 74. Is connected to a speed increaser 78, and the output shaft of the speed increaser 78 is coupled to the rotor shaft of the generator 79. The nacelle 72 is turned at an arbitrary angle by the turning motor 80 via the speed reducer 81.

  A main shaft support bearing 75 incorporated in the bearing housing 74 is a tapered roller bearing according to an embodiment of the present invention, and includes an inner ring including one end connecting portion connected and fixed to one end of a fixing member, and a fixing member. An outer ring including the other end connecting portion connected and fixed to the other end, a tapered roller, a plurality of column portions extending in a direction along the axis so as to form a pocket for holding the tapered roller, and the plurality of column portions are connected. And a plurality of retainer segments that have a connecting portion extending in the circumferential direction and are sequentially arranged in the circumferential direction between the outer ring and the inner ring.

  Since the main shaft support bearing 75 supports the main shaft 76 that fixes the blade 77 that receives large wind force at one end, a large load is applied, and the bearing itself needs to be large. Here, when the cage is divided and has the above-described configuration, when the tapered roller bearing is incorporated into the main shaft 76, the one end coupling portion and the other end coupling portion are used and incorporated using a bearing incorporation jig. Even when the inner ring is lifted with the small-diameter side end face facing downward, the cage segment does not fall off. If it does so, productivity of the spindle support structure of a wind power generator can be made favorable.

  In the above embodiment, the fixing member is composed of one member having a substantially L-shaped cross section. However, the present invention is not limited to this, and two plate-shaped members are combined in an L-shape. It is good also as a structure. By doing so, the member constituting the fixing member can be made a simpler shape. Further, the fixing member may have a substantially V-shaped cross section or a substantially U-shaped cross section. Further, when the inner ring and the outer ring are fixed by the fixing member, the inner ring and the outer ring are fixed by screw holes, outer ring through holes, bolts, fixing rods, etc., but not limited thereto, other methods such as fitting type fixing Alternatively, the fixing member and the inner ring or the like may be fixed by an adhesive type fixing. Moreover, you may decide to provide the location which fixes a fixing member, an inner ring | wheel etc. in parts other than an above-described location, for example, the outer-diameter side of an outer ring | wheel. Further, a lifting line may be connected to the inner ring side.

  In addition, in said embodiment, although the case where it used as a double row tapered roller bearing was demonstrated, it is applied not only to this but the case where it uses as a single row tapered roller bearing. Further, the tapered roller bearing includes a spacer, but the present invention is not limited to this, and the present invention can be applied to a tapered roller bearing of a type that does not include such a spacer.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to the thing of embodiment shown in figure. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention.

  The bearing assembly jig according to the present invention is effectively used when the tapered roller bearing is lifted and assembled.

  Further, the tapered roller bearing according to the present invention is effectively used when good assemblability is required.

  Further, the method for assembling the tapered roller bearing according to the present invention is effectively used when the tapered roller bearing is lifted and assembled.

  The main shaft support structure for a wind power generator according to the present invention is effectively used for the main shaft support structure for a large-scale wind power generator.

It is sectional drawing which shows the tapered roller bearing which fixed the inner ring | wheel and the outer ring | wheel with the fixing member. It is a perspective view of a cage segment included in a tapered roller bearing according to an embodiment of the present invention. It is sectional drawing at the time of cut | disconnecting the retainer segment shown in FIG. 2 to radial direction. It is sectional drawing at the time of cut | disconnecting the retainer segment shown in FIG. 2 to an axial direction. It is a perspective view which shows the spacer contained in a tapered roller bearing. It is a schematic sectional drawing of a tapered roller bearing at the time of arranging a plurality of cage segments and spacers in the circumferential direction. It is an expanded sectional view which shows the adjacent retainer segment. It is an expanded sectional view at the time of arrange | positioning a spacer between the 1st retainer segment and the last retainer segment. It is sectional drawing which shows the double row tapered roller bearing which concerns on one Embodiment of this invention. It is a flowchart which shows the outline of the incorporating method of the tapered roller bearing which concerns on one Embodiment of this invention. It is a perspective view which shows the fixing member which concerns on one Embodiment of this invention. It is the figure which looked at a part of tapered roller bearing from the direction of arrow XII in FIG. It is sectional drawing which shows the state which suspended the tapered roller bearing. It is a figure which shows an example of the main shaft support structure of the wind power generator using the tapered roller bearing which concerns on this invention. It is an illustration side view of the main shaft support structure of the wind power generator shown in FIG. It is a perspective view of the retainer segment in the past. It is sectional drawing at the time of cut | disconnecting the retainer segment shown in FIG. 16 to radial direction.

Explanation of symbols

  11a, 11b, 11c, 11d, 45a, 45b Cage segment, 12a, 12b, 12c, 34, 44a, 44b Tapered roller, 13a, 13b, 13c, 35a Pocket, 14a, 14b, 14c, 14d Pillar part, 15a, 15b connecting portion, 16a, 16b protrusion, 17a, 17b, 17c, 17d, 18a, 18b, 18c, 18d guide surface, 19, 20, 30a, 30b oil groove, 21a, 21b, 50a, 50b end surface, 22 PCD, 26 spacer, 27a, 27b, 60a, 60b end, 28 center, 31 tapered roller bearing, 32, 42 outer ring, 33, 43a, 43b inner ring, 39 clearance, 40 last clearance, 41 double row tapered roller bearing, 46 Inner ring spacer, 47 Rotating shaft, 48a, 48b Small-diameter end face, 49a, 49b Large-diameter end face, 51 Fixing member, 52 First part, 53 Second part, 54 First fixing member through hole, 55 Second fixing member through hole, 56, 57 surface, 58 Screw hole, 59 Outer ring through hole, 61 bolt, 62 Fixing rod , 63a Stopper, 63b Nut, 64 annular part, 65 wire, 66 hook, 70 support base, 71 swivel bearing, 72 nacelle, 73 casing, 74 bearing housing, 75 spindle support bearing, 76 spindle, 77 blade, 78 Speed increaser, 79 generator, 80 turning motor, 81 speed reducer.

Claims (7)

An inner ring, an outer ring, a tapered roller, a plurality of column portions extending in a direction along the axis so as to form a pocket for holding the tapered roller, and a connecting portion extending in the circumferential direction so as to connect the plurality of column portions And a tapered roller bearing for supporting the main shaft of a wind power generator, which is combined with a plurality of cage segments sequentially arranged in the circumferential direction between the outer ring and the inner ring, is incorporated in a rotary shaft extending in the vertical direction. A bearing built-in jig used for
A fixing member for connecting and fixing the inner ring and the outer ring while maintaining the combined state;
The fixing member includes a first part fixed to the inner ring and extending in a radial direction, and a second part extending in an axial direction from an outer end portion of the first part and fixed to the outer ring . 2. The bearing built-in jig according to claim 1 , wherein the fixing member includes a bolt that fixes the first portion to the inner ring, and a fixing rod that fixes the second portion to the outer ring. The bearing incorporating jig according to claim 2 , wherein the fixing rod includes a ring portion for connecting a suspension line at one end thereof. An inner ring having a screw hole for screwing a bolt ;
An outer ring having a through hole through which the connecting rod penetrates ;
With tapered rollers,
A plurality of pillars extending in a direction along the axis so as to form a pocket for holding the tapered rollers, and a connecting part extending in the circumferential direction so as to connect the plurality of pillars, and the outer ring and the inner ring A plurality of cage segments arranged sequentially in the circumferential direction between them,
A tapered roller bearing for supporting the main shaft of a wind power generator . The tapered roller bearing for supporting a main shaft of a wind power generator according to claim 4, wherein a roller guide surface for guiding the roller is provided on an inner diameter side and an outer diameter side of the pillar portion in the cage segment. An inner ring, an outer ring, a tapered roller, a plurality of column portions extending in a direction along the axis so as to form a pocket for holding the tapered roller, and a connecting portion extending in the circumferential direction so as to connect the plurality of column portions And a tapered roller bearing for supporting the main shaft of a wind power generator, which is combined with a plurality of cage segments sequentially arranged in the circumferential direction between the outer ring and the inner ring, is incorporated in a rotary shaft extending in the vertical direction. A method of incorporating a tapered roller bearing for supporting a main shaft of a wind power generator ,
A first portion fixed to the inner ring and extending in a radial direction; and a second portion extending in an axial direction from an outer end portion of the first portion and fixed to the outer ring . The inner ring and the outer ring are maintained in a combined state. Prepare the fixing member to be connected and fixed as it is,
A plurality of tapered rollers and a plurality of cage segments are arranged between the inner ring and the outer ring to form a tapered roller bearing for supporting the main shaft of the wind power generator ,
The inner ring and the outer ring included in the tapered roller bearing for supporting the main shaft of the wind power generator are connected and fixed by the fixing member,
A method of assembling a tapered roller bearing, in which a tapered roller bearing for supporting a main shaft of a wind power generator in which an inner ring and an outer ring are connected and fixed is lifted and incorporated into a rotating shaft. A blade that receives wind,
One end of which is fixed to the blade and rotates with the blade;
A main shaft support structure of a wind power generator, which is incorporated in a housing and has a tapered roller bearing for main shaft support of the wind power generator that rotatably supports the main shaft,
The main shaft supporting tapered roller bearing of the wind power generator forms an inner ring having a screw hole for screwing a bolt , an outer ring having a through hole for allowing a connecting rod to pass therethrough , a tapered roller, and a pocket for holding the tapered roller. A plurality of column portions extending in a direction along the axis, and a connecting portion extending in the circumferential direction so as to connect the plurality of column portions, and sequentially arranged in the circumferential direction between the outer ring and the inner ring A main shaft support structure of a wind power generator, comprising a plurality of cage segments.

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