JP5911171B2 - Oil ring damping device - Google Patents

Description

  The present invention relates to an oil ring damping device that suppresses swinging of an oil ring of a sliding bearing.

  For example, a journal bearing of a hydroelectric power plant is provided with an oil ring for lubricating and cooling the journal bearing. That is, a metal oil ring is disposed so as to be rotatable with the rotation of the horizontally extending main shaft, and the lubricating oil is accommodated in the bearing oil tank so that the lower part of the oil ring is in contact with and immersed in the lubricating oil. ing. Then, as the main shaft rotates and the oil ring rotates, the lubricating oil in the bearing oil tank is pumped up, and the lubricating oil is scattered and brought into contact with the journal bearing, whereby the journal bearing is lubricated and cooled.

  The main shaft is provided with a groove-shaped oil ring guide extending in the circumferential direction. The oil ring is perpendicular to the main shaft with the upper portion of the oil ring fitted and fitted in the groove of the oil ring guide. It is arrange | positioned so that it may hang from. As a result, the oil ring rotates while being guided and guided by the oil ring guide. Furthermore, a technique for providing a non-metallic material with low frictional resistance on the inner surface of the oil ring guide (oil ring groove) is known in order to prevent generation of metal wear powder due to contact between the oil ring and the oil ring guide. (For example, refer to Patent Document 1).

Japanese Patent Application Laid-Open No. 09-203413

  By the way, only the upper part of the oil ring is guided and supported by an oil ring guide, and the lower part (bearing oil tank side) of the oil ring is not guided. For this reason, the convection of the lubricating oil in the bearing oil tank acts on the oil ring, and the oil ring is swung (swayed) in the axial direction, preventing smooth and proper rotation of the oil ring. Confirmed by the inventor.

  When such a vibration occurs, the oil ring and the oil ring guide come into contact with each other. If the contact state continues for a long time, the oil ring is damaged or worn. Furthermore, if damage or wear occurs, the wear resistance of the oil ring may increase and rotation abnormality may occur, or a damaged metal piece of the oil ring may enter the bearing and damage the bearing surface. On the other hand, the technique of Patent Document 1 only prevents the generation of metal wear powder due to contact between the oil ring and the oil ring guide, and cannot suppress the vibration of the oil ring itself.

  Therefore, an object of the present invention is to provide an oil ring damping device that can suppress the oil ring from swinging.

  In order to solve the above-mentioned problem, the invention of claim 1 is arranged so as to be rotatable with the rotation of a rotating shaft extending horizontally, and the lower part is immersed in lubricating oil in the oil tank and rotated to rotate the oil tank. An oil ring damping device that suppresses swinging of an oil ring that pumps up lubricating oil in the oil ring, and is disposed on the oil tank side so as to sandwich the ring surface of the oil ring. The first rectifying plate and the second rectifying plate that prevent convection from acting on the oil ring, the distance (first distance) between the first rectifying plate and the oil ring, and the second rectifying plate It is characterized by comprising holding adjusting means that keeps the distance between the plate and the oil ring (second distance) equal, and is capable of adjusting the distance.

  According to the present invention, the first distance and the second distance are adjusted by the holding adjustment means, and are maintained at the same / same distance so as to sandwich the ring surface of the oil ring (on both sides of the oil ring). ) The first rectifying plate and the second rectifying plate are disposed on the oil tank side.

  According to a second aspect of the present invention, in the oil ring vibration damping device according to the first aspect, the holding adjustment means includes a connecting member that connects the first rectifying plate and the second rectifying plate and is elastically deformable. The connecting member is deformed so that the distance can be adjusted.

  According to the first aspect of the present invention, the first rectifying plate and the second rectifying plate are disposed on both sides of the oil ring on the oil tank side, and the convection of the lubricating oil in the oil tank acts on the oil ring. Since this is prevented (the lubricating oil on both sides of the oil ring is rectified), the oil ring can be prevented from swinging due to the convection of the lubricating oil. As a result, smooth and proper rotation of the oil ring is maintained, and damage and wear due to contact between the oil ring and the oil ring guide, and further damage to the bearing surface due to metal pieces can be prevented and suppressed. .

  Further, since the distance between the first rectifying plate and the oil ring (first distance) and the distance between the second rectifying plate and the oil ring (second distance) are kept equal, The oil amount and pressure on both sides and both sides are equal, and the states on both sides are balanced. As a result, the swinging movement of the oil ring is further suppressed, and the oil ring can be rotated more smoothly and appropriately. In addition, since the first distance and the second distance are adjustable, adjusting the distance according to the width of the oil ring and the size of the oil tank makes it possible to adjust the amount of lubricating oil pumped up by the oil ring. It is possible to appropriately suppress the swinging movement of the oil ring according to the width of the oil ring and the like.

  According to the second aspect of the present invention, the distance between each rectifying plate and the oil ring can be adjusted by simply deforming the connecting member that connects the first rectifying plate and the second rectifying plate. The distance between the current plate and the oil ring can be adjusted. Moreover, since the first rectifying plate and the second rectifying plate are connected by the connecting member, there is no need to handle and adjust the first rectifying plate and the second rectifying plate separately, and handling and adjustment are not necessary. Becomes easy. Furthermore, since only the first rectifying plate and the second rectifying plate are connected by an elastically deformable connecting member, the configuration is simple and the manufacturing cost can be reduced.

It is a perspective view which shows each component of the oil ring damping device which concerns on embodiment of this invention. It is a schematic front view which shows the state which has arrange | positioned the oil ring damping device of FIG. It is a perspective view which shows the baffle plate unit of the oil ring damping device of FIG. It is a front view which shows the state which has arrange | positioned the oil ring damping device of FIG. It is a schematic plan view which shows the state which has arrange | positioned the oil ring damping device of FIG. It is a schematic side view which shows the state which has arrange | positioned the oil ring damping device of FIG. It is a conceptual diagram which shows the arrangement | positioning state and lubricating oil state of the conventional oil ring.

  The present invention will be described below based on the illustrated embodiments.

  FIG. 1 is a perspective view showing each component of an oil ring vibration damping device 1 according to an embodiment of the present invention. First, the bearing device will be described. As shown in FIG. 2, an oil ring 103 for lubricating and cooling the journal bearing 102 on a journal bearing (sliding bearing) 102 that supports a horizontally extending main shaft (rotating shaft) 101. Is provided. That is, as the main shaft 101 passing through the ring of the metal-made annular oil ring 103 is rotated, the oil ring 103 is rotatably arranged, and the lower part of the oil ring 103 is in contact with and immersed in the lubricating oil L. Thus, the lubricating oil L is accommodated in the bearing oil tank 104. The main shaft 101 is provided with a groove-shaped oil ring guide 105 extending in the circumferential direction. With the oil ring 103 mounted and fitted in the groove of the oil ring guide 105, the oil ring 103 is The main shaft 101 is arranged so as to hang vertically. When the main shaft 101 rotates, the oil ring 103 rotates while being guided by the oil ring guide 105, whereby the lubricating oil L in the bearing oil tank 104 is pumped up, and this lubricating oil L is scattered and contacted with the journal bearing 102. Thus, the journal bearing 102 is lubricated and cooled.

  The oil ring damping device 1 is a device that prevents the oil ring 103 of such a bearing device from swinging in the axial direction (width direction), and is disposed in the bearing oil tank 104, as shown in FIG. 3 mainly includes a current plate unit 2, a fixed plate 3, a mounting piece 4, and a guide piece 5.

  As shown in FIG. 3, the rectifying plate unit 2 includes a first rectifying plate 21, a second rectifying plate 22, and a connecting plate (connecting member) 23. Each of the rectifying plates 21 and 22 has a substantially rectangular plate shape, and is disposed in the oil tank 104 in parallel so as to sandwich the annular surface and both sides of the oil ring 103 as will be described later. The convection (turbulent flow) of the lubricating oil L in 104 is prevented from acting on the oil ring 103. That is, by enclosing both sides of the oil ring 103 with the main surfaces 21 a and 22 a, the convection of the lubricating oil L is blocked from acting on the oil ring 103. Therefore, the size (width, height) of the current plates 21 and 22 sufficiently surrounds the lower part of the oil ring 103 immersed in the lubricating oil L, and the lubricating oil L is produced and statically flow around the lower part. It is set to be.

  One side portion of the first rectifying plate 21 and one side portion of the second rectifying plate 21 are connected by a connecting plate 23. The connecting plate 23 is composed of a leaf spring and is elastically deformable. By deforming (stretching), the distance between the rectifying plates 21 and 22 is adjusted. That is, by bending or stretching, the distance / interval (first distance D1) between the first rectifying plate 21 and the oil ring 103, the second rectifying plate 22 and the oil ring 103 shown in FIG. The distance / interval D2 (second distance D2) is adjustable.

  Further, flange portions 21b and 22b extending in the horizontal direction are formed at the upper end portions of the both rectifying plates 21 and 22, and fixing bolts (welt bolts) 24 extending vertically are formed at both ends of the flange portions 21b and 22b. It is attached. Further, the flange portion 21b of the first rectifying plate 21 is formed with a plurality of insertion holes 21c for inserting mounting bolts 43 described later. The insertion hole 21c is a long hole extending in the axial direction (width direction) of the oil ring 103, and the arrangement position of the first rectifying plate 21 can be adjusted as will be described later. Further, guide grooves 21d and 22d (22d not shown) in which guide rails 52 of the guide piece 5 described later are mounted are provided at the lower ends of both the rectifying plates 21 and 22, and the number of guide pieces 5 (2). ) And the arrangement position.

  As shown in FIG. 1, the fixing plate 3 is in the shape of an elongated flat plate, and a long hole 3 a extending in the longitudinal direction is formed in the central portion. The rectifying plates 21 and 22 are fixed by inserting the fixing bolt 24 into the elongated hole 3a and tightening the fixing nut 31 on the fixing bolt 24.

  The attachment piece 4 is a member for attaching the rectifying plate unit 2 to the bearing oil tank 104. As shown in FIG. 1, the vertical section has an L shape, and the horizontal portion 41 is formed with a screw hole 41a. ing. As shown in FIGS. 2 and 4, the vertical portion 42 is fixed to the central wall 104 a that divides the oil tank 104 into two parts, and the flange portion 21 b of the first rectifying plate 21 is overlaid on the horizontal portion 41. The rectifying plate unit 2 is attached to the bearing oil tank 104 by inserting the mounting bolt 43 into the insertion hole 21c and tightening the mounting bolt 43 into the screw hole 41a. Here, an oil ring 103 is provided for each oil tank chamber partitioned by the central wall 104a. As will be described later, the oil ring damping device 1 is provided for each oil ring 103. The

  The guide piece 5 is a member that guides and supports the current plates 21 and 22, and as shown in FIG. 1, the vertical section has an L shape, and the horizontal portion 51 that extends horizontally has a convex guide. The rail 52 is formed extending horizontally. As shown in FIG. 4, the vertical portion 53 is fixed to the central wall 104 a of the oil tank 104, and the guide rail 52 is mounted and fitted in the guide grooves 21 d and 22 d of the rectifying plates 21 and 22. The rectifying plates 21 and 22 are guided and supported by 52. That is, the upper part of the rectifying plates 21 and 22 is fixed by the fixing plate 3, and the lower part of the rectifying plates 21 and 22 is supported by the guide piece 5, thereby supporting both the rectifying plates 21 and 22 in parallel to the oil ring 103. Is supposed to hold.

  As described above, the holding plate 23, the fixing plate 3 and the guide piece 5 constitute the holding adjustment means, and the distance (distance) between the first rectifying plate 21 and the second rectifying plate 22 as described later. D1 and D2) are adjusted, and the first distance D1 and the second distance D2 are kept equal.

  Next, the arrangement method and operation of the oil ring vibration damping device 1 having such a configuration will be described. Here, as described above, the attachment piece 4 and the guide piece 5 are disposed on the central wall 104 of the oil tank 104. At this time, when the rectifying plate unit 2 is attached, the attachment pieces 4 are arranged so that the lower end edges of the rectifying plates 21 and 22 are not in contact with the bottom surface of the oil tank 104, that is, the lower portion of the rectifying plate unit 2 is opened. And a guide piece 5 are disposed.

  First, according to the width W of the oil ring 103, the size of the oil tank 104, etc., the amount of the lubricating oil L pumped up by the oil ring 103 is appropriately secured, and the lubricating oil L is produced around the lower portion of the oil ring 103. The distance between the first rectifying plate 21 and the second rectifying plate 22 is adjusted so that the swinging motion of the oil ring 103 is appropriately suppressed due to static flow. At this time, as described above, with the fixing bolt 24 inserted into the elongated hole 3a of the fixing plate 3, the rectifying plates 21 and 22 are moved and slid while deforming the connecting plate 23, and fixed at a predetermined / desired position. The fixing nut 31 is tightened on the bolt 24.

  Then, the rectifying plate unit 2 adjusted in this way is attached to the attachment piece 4. At this time, as described above, the guide rail 52 of the guide piece 5 is mounted in the guide grooves 21d and 22d of the rectifying plates 21 and 22, and the flange portion 21b of the first rectifying plate 21 is overlapped on the mounting piece 4 to be attached. Tighten the bolt 43. Here, the position of the insertion hole 21c with respect to the mounting bolt 43 is set so that the first rectifying plate 21 is arranged at a predetermined position, that is, the first distance D1 shown in FIG. adjust.

  As shown in FIGS. 5 and 6, the open side (the anti-rectifying plate 23 side) of the rectifying plate unit 2 is positioned on the pumping side of the lubricating oil L (the side where the oil ring 103 exits from the oil tank 104), and the oil ring 103. The rectifying plate unit 2 is arranged so that the rectifying plate 23 side of the rectifying plate unit 2 is located on the side where the oil enters the oil tank 104.

  Such adjustment and attachment of the current plate unit 2 may be performed in parallel. That is, the fixing nut 31 and the mounting bolt 43 are temporarily tightened so that the appropriate pumping amount is ensured as described above, the swinging movement of the oil ring 103 is suppressed, and the distances D1 and D2 are equal. As described above, the current plates 21 and 22 are moved and adjusted. After the adjustment, the fixing nut 31 and the mounting bolt 43 are tightened.

  In this way, the oil ring damping device 1 is provided for each oil ring 103. When the oil ring 103 rotates in the direction of the arrow R1 in FIGS. 2, 5 and 6 in such an arrangement state, the lubricating oil L in the oil tank 104 is pumped up, and the journal bearing 102 is lubricated and cooled by this lubricating oil L. The The scattered lubricating oil L flows into the oil tank 104 from many sides in various states, and convection / turbulence of the lubricating oil L can occur in the oil tank 104, but the rectifying plates 21 and 22 are provided. Therefore, the lubricating oil L flows along the rectifying plates 21 and 22, and the generation of turbulent flow is suppressed.

  Even if turbulent flow occurs, the rectifying plates 21 and 22 are disposed on both sides of the oil ring 103, so that convection and turbulent flow are prevented from acting on the oil ring 103, and the oil ring 103 Lubricating oil L on both sides flows along the rectifying plates 21 and 22. That is, the flow becomes a rectification / static flow as shown by an arrow R2 (broken arrow) in FIGS. 2, 5, and 6, and the oil ring 103 is prevented from being shaken by the convection of the lubricating oil L and suppressed.

  Further, when the oil ring damping device 1 is not provided, for example, as shown in FIG. 7, the distance D4 between the center wall 104a and the oil ring 103 is smaller than the distance D3 between the oil tank (outer wall) 104 and the oil ring 103. When it is narrow, the central wall 104a side has a higher pressure. In addition, since the high-temperature lubricating oil L that has cooled the journal bearing 102 flows into the oil tank 104 from above, the temperature of the upper part of the oil tank 104 becomes high, while the lower part of the oil tank 104 is cooled by a cooling fan or outside air and becomes low temperature. Thus, since the pressure difference and temperature difference of the lubricating oil L occur around the oil ring 103, the force acting on the oil ring 103 becomes unbalanced, and the oil ring 103 swings.

  On the other hand, by providing the oil ring damping device 1, the first distance D1 and the second distance D2 become equal as shown in FIG. Are even. Furthermore, since both sides of the oil ring 103 are surrounded by the rectifying plates 21 and 22, the high temperature lubricating oil L does not flow directly into the oil ring 103 side, but flows into the oil ring 103 side from below after being cooled. To do. Thus, since the pressure difference and temperature difference of the lubricating oil L do not occur around the oil ring 103, the forces acting on the oil ring 103 are balanced, and the swinging movement of the oil ring 103 is prevented and suppressed.

  As described above, according to the oil ring damping device 1, it is possible to suppress the oil ring 103 from swinging. As a result, smooth and proper rotation of the oil ring 103 is maintained, and damage and wear due to contact between the oil ring 103 and the oil ring guide 105 and further, damage to the bearing surface due to metal pieces can be prevented and suppressed. It becomes possible.

  Moreover, since the distance D1 between the first rectifying plate 21 and the oil ring 103 and the distance D2 between the second rectifying plate 22 and the oil ring 103 are adjustable, the width W of the oil ring 103 and the size of the oil tank 104 are adjustable. By adjusting the distances D1 and D2 according to the above, the oil ring 103 swings according to the width W of the oil ring 103 while ensuring the amount of the lubricating oil L drawn up by the oil ring 103 is properly secured. Can be suppressed appropriately.

  Furthermore, as described above, since the turbulent flow of the lubricating oil L is suppressed inside and outside the flow straightening plates 21 and 22 and rectified, heat exchange with the outside air through the oil tank 104 is efficiently performed, and the lubricating oil L Can be efficiently and effectively cooled. In addition, as described above, the cooled lubricating oil L flows into the oil ring 103 side from below, and the lubricating oil L is pumped up by the oil ring, so that the cooling effect on the journal bearing 102 is improved.

  On the other hand, since the distances D1 and D2 between the respective rectifying plates 21 and 22 and the oil ring 103 can be adjusted simply by bending or extending the connecting plate 23, the distances D1 and D2 can be easily adjusted. Moreover, since the first rectifying plate 21 and the second rectifying plate 22 are connected by the connecting plate 23, it is necessary to handle and adjust the first rectifying plate 21 and the second rectifying plate 22 separately. It is easy to handle and adjust. Furthermore, since only the first rectifying plate 21 and the second rectifying plate 22 are connected by the deformable connecting plate 23, the configuration is simple and the manufacturing cost can be reduced. Further, the oil ring damping device 1 can be easily attached to the existing / existing bearing device as described above.

  Although the embodiment of the present invention has been described above, the specific configuration is not limited to the above embodiment, and even if there is a design change or the like without departing from the gist of the present invention, Included in the invention. For example, in the above embodiment, the position (distance D1, D2) of the first rectifying plate 21 is adjustable by making the insertion hole 21c a long hole, but the thickness of the vertical portion 42 of the mounting piece 4 is adjustable. Or by providing a spacer between the central wall 104a and the vertical portion 42. Further, depending on the position of the first rectifying plate 21, the mounting bolt 43 is inserted into the elongated hole 3 a of the fixing plate 3 protruding horizontally from the flange portion 21 b of the first rectifying plate 21, and attached to the mounting piece 4. It may be fixed.

DESCRIPTION OF SYMBOLS 1 Oil ring damping device 2 Current plate unit 21 1st current plate 22 2nd current plate 23 Connection board (connection member, holding adjustment means)
3 Fixing plate (holding adjustment means)
4 Mounting piece 5 Guide piece (holding adjustment means)
101 Spindle (Rotating shaft)
102 Journal bearing 103 Oil ring 104 Oil tank L Lubricating oil

Claims (2)

The oil ring that is rotatably arranged with the rotation of the horizontally extending rotating shaft and the lower part is immersed in the lubricating oil in the oil tank, and prevents the oil ring that pumps up the lubricating oil in the oil tank from swinging. An oil ring damping device that
A first rectifying plate and a second rectifying plate which are disposed on the oil tank side so as to sandwich the ring surface of the oil ring and prevent convection of lubricating oil in the oil tank from acting on the oil ring;
Holding adjustment means for keeping the distance between the first rectifying plate and the oil ring equal to the distance between the second rectifying plate and the oil ring, and capable of adjusting the distance;
An oil ring damping device comprising: The holding adjusting means includes a connecting member that is elastically deformable by connecting the first rectifying plate and the second rectifying plate, and the distance is adjustable by deforming the connecting member.
The oil ring damping device according to claim 1.

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