JP6517067B2 - Oil ring type slide bearing - Google Patents

Description

  The present invention relates to an oil ring type slide bearing.

  Conventionally, oil ring type bearing devices are known. The bearing is provided with a substantially semi-cylindrical upper bearing metal and a lower bearing metal, and they are integrally fixed to form a single cylinder. A groove for housing an oil ring is provided at the central portion of the upper bearing metal, and the oil ring is suspended on the shaft in a state of being rotatably accommodated in the groove. The lower part of the oil ring is immersed in the oil stored under the lower bearing metal, and when the shaft rotates, the oil ring suspended on the shaft rotates following the shaft and scrapes the oil. This operation lubricates the bearing metal with oil (see, for example, Patent Document 1).

  In the case of such a bearing structure, it is necessary to provide a groove for housing the oil ring in the upper bearing metal, but in order to provide such a groove in the upper bearing metal, it is necessary to process the upper bearing metal. At the time of this processing, distortion or the like occurs in the upper bearing metal, and as a result, there is a problem that the cylindricity of the upper bearing metal decreases. In addition, machining of the upper bearing metal requires a lot of cost and labor.

  For this reason, instead of arranging the oil ring in the center of the bearing metal, it is expected to be effective to arrange the oil ring on the outside of the bearing metal and thereby avoid groove processing of the upper bearing metal.

  When the oil ring is disposed at the center of the bearing metal, the scattered oil is supplied to the bearing metal because both sides of the oil ring oppose the upper bearing metal even if the scraped oil is scattered to both sides in the axial direction. . On the other hand, when the oil ring is disposed at the end of the bearing metal which is the outer side of the bearing metal, one side of the oil ring faces the bearing metal while the other side does not. Therefore, the amount of oil scattered in the oil tank among the oil scraped up by the oil ring increases, and as a result, the same oil ring may not be able to supply the necessary amount of oil to the bearing metal.

  Therefore, a structure that can efficiently supply the oil scraped up by the oil ring to the bearing metal is required.

Japanese Patent Application Laid-Open No. 10-96425 (Apr. 14, 1998)

  In view of the above problems, an object of the present invention is to supply a sufficient amount of oil to the bearing metal by increasing the amount of oil supplied to the bearing metal among the oil scraped up by the oil ring.

  In order to solve the above-mentioned problems, an oil ring type slide bearing according to the present invention comprises: a shaft, a bearing metal for supporting the shaft, and an oil ring suspended on the shaft and scraping oil located under the shaft And an oil supply portion disposed at an axial end of the shaft of the bearing metal, and the oil ring is suspended on the shaft at a position where the oil supply portion is present.

  According to the above configuration, since the oil ring is disposed on the axial outer side of the bearing metal, machining of the bearing metal becomes unnecessary, which contributes to reduction of machining cost.

  Furthermore, since the oil supply portion is disposed at a position where the oil ring is suspended on the shaft, the oil scraped off from the oil ring can be efficiently supplied to the sliding contact surface between the shaft and the bearing metal.

  The oil supply unit preferably functions as an oil receiver for receiving the oil scraped up by the oil ring.

  According to the above configuration, the oil scraped up by the oil ring can be received using the oil supply unit.

  It is preferable to further comprise a supply path for guiding oil to a sliding contact surface between the shaft and the bearing metal.

  According to the above configuration, the sliding contact surface can be reliably supplied through the supply path.

  The feed path preferably includes at least one of a rotational direction path extending in the rotational direction of the shaft and / or an axial path extending in the axial direction of the axis.

  According to the above configuration, oil can be supplied to the sliding contact surface of the shaft and the bearing metal through the rotational direction path and / or the axial path.

  Preferably, the oil supply portion has an oil receiving port for receiving the oil scraped up by the oil ring, and the oil receiving port is in communication with the supply path.

  According to this configuration, the oil can be reliably supplied from the oil receiving port to the supply path.

  It is preferable to further include a positioning portion that determines the position of the oil ring in the axial direction of the shaft.

  According to the above configuration, the oil ring suspended on the shaft is positioned in the axial direction of the shaft by the positioning member when it rotates with the rotation of the shaft, so the oil ring is inadvertently moved in the axial direction Is prevented.

  The positioning portion has a facing portion facing the outer surface of the oil ring, and the distance between the outer surface of the oil ring and the facing portion is narrowed along the rotation direction of the oil ring. It is preferable to arrange.

  The present invention is effective in that the amount of oil supplied to the sliding contact surface between the shaft and the bearing metal can be increased among the oil scraped up by the oil ring.

It is a figure showing the schematic structure of the oil ring type slide bearing concerning one embodiment of the present invention. It is the sectional view which looked at the oil ring type slide bearing concerning other embodiments of the present invention from the direction of an axis. FIG. 3 is a cross-sectional view taken along line X ₁ -X ₁ in FIG. It is a perspective view of the bearing metal in which the upper bearing metal and lower bearing metal of the oil ring type slide bearing concerning the above-mentioned other embodiment were united. It is an AA arrow directional cross-sectional view of FIG. It is a perspective view of the oil ring guide of the oil ring type slide bearing concerning the above-mentioned other embodiment. It is an enlarged view of the axis | shaft of an oil ring type slide bearing which concerns on said other embodiment, a bearing metal, an oil ring, and an oil ring guide. It is an enlarged view of the axis | shaft of an oil ring type slide bearing which concerns on said other embodiment, a bearing metal, an oil ring, and an oil ring guide. It is an enlarged view of the oil ring type slide bearing concerning the above-mentioned other embodiment, (a)-(d) is an explanatory view explaining the 1st space, (e) is the 1st-4th space It is an explanatory view explaining. It is another enlarged view of the oil ring type slide bearing which concerns on the said other embodiment, (a)-(d) is explanatory drawing explaining a 2nd space, (e) is the 1st-4th It is an explanatory view explaining space. It is an explanatory view for explaining the 1st space and the 2nd space of the oil ring type slide bearing concerning the above-mentioned other embodiment. It is a modification in the AA line arrow cross section of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same or similar parts will be denoted by the same or similar reference numerals, and those with the same or similar reference numerals in the drawings may be omitted from the description. Further, the dimensions, materials, shapes, relative arrangements, processing methods, and the like of the configuration described in the present embodiment are merely an example, and the scope of the present invention should not be interpreted limitedly by these. Furthermore, the drawings are schematic, and dimensional ratios and shapes are different from actual ones.

Embodiment 1
FIG. 1 is a view showing a schematic structure of an oil ring type slide bearing according to Embodiment 1 of the present invention. As shown in FIG. 1, the oil ring type slide bearing according to the present embodiment comprises an upper bearing metal 12, an oil supply portion 13b (lower bearing metal end portion), a lower bearing metal central portion 13c, and an oil ring 14b. And.

  The upper bearing metal 12 and the lower bearing metal central portion 13c are separately formed, and are fastened by a plurality of screws to form a cylindrical bearing metal. A bearing metal is formed by the upper bearing metal 12 and the lower bearing metal central portion 13c integrally fixed in this manner, and the shaft 11 is rotatably supported. Note that the bearing metal may be integrally formed or may be divided into a plurality and integrally combined. Further, the fixing may be a fixing method other than the screw.

  The oil ring 14b is rotatably suspended around the shaft 11 above the oil supply portion 13b. The lower portion of the oil ring 14b is immersed in the oil in the oil tank below the oil supply portion 13b. As the shaft 11 rotates, the oil ring 14b is co-rotated, and the oil stored in the oil tank is scraped up above the shaft 11.

  The oil ring 14 b is disposed to face one end face of the upper bearing metal 12. Thus, unlike the conventional case, the oil ring is suspended on the shaft 11 without providing the upper bearing metal 12 with a groove. There is no reduction in the cylindricity of the upper bearing metal 12 due to distortion or the like of the upper bearing metal 12 due to processing.

  The oil supply portion 13b is disposed at a position where the oil ring 14b is suspended on the shaft 11, and the oil scraped up by the oil ring 14b falls onto the upper surface of the oil supply portion 13b and is supplied to the bearing metal. Ru.

  The oil supply portion 13b and the lower bearing metal central portion 13c are separately formed. The oil supply portion 13b is fixed to the end face of the lower bearing metal central portion 13c by screwing the setscrews 17a, 17b and 17c into screw holes provided in one end face of the lower bearing metal central portion 13c.

  The upper surface of the oil supply unit 13 b functions as an oil receiver for receiving oil, and is further provided with an oil receiver 301 for storing oil. That is, the oil supply unit 13 b temporarily guides the oil scraped up by the oil ring 14 b to the sliding contact surface between the receiving shaft 11 and the bearing metal. The oil receiving port 301 is provided on the upper surface of the oil supply portion 13 b on the downstream side in the rotational direction as viewed from the top of the shaft 11. The oil scraped up by the oil ring 14b moves to the downstream side in the rotational direction as it rotates, so being in this position, the oil scraped up by the oil ring 14b is more likely to be received, and further the shaft 11 and bearing metal It becomes easy to supply oil to the sliding contact surface with the

  Further, the oil supply portion 13 b is provided with a rotational direction path 302. The rotational direction path 302 is for supplying the oil received by the oil supply portion 13 b, particularly the oil receiving port 301, to the sliding contact surface between the lower bearing metal central portion 13 c and the shaft 11. The rotational direction path 302 is formed along the rotational direction of the shaft 11 and is in communication with the oil receiving port 301. The oil received by the oil receiving port 301 flows in the rotational direction path 302 as the shaft 11 rotates, and the lower bearing metal central portion 13 c and the shaft 11 pass through the sliding contact surface between the oil supply portion 13 b and the shaft 11. Flow into the sliding contact surface with the

  Thus, according to the oil ring type slide bearing according to the present embodiment, since the oil ring 14b is disposed outside the upper bearing metal 12 in the axial direction of the shaft 11, it is not necessary to groove the upper bearing metal 12 itself. Contributes to reduction of processing cost.

  Further, since the oil supply portion 13b is disposed at a position where the oil ring 14b is suspended on the shaft 11, the oil scraped up by the oil ring 14b can be efficiently supplied to the sliding contact surface of the bearing metal.

  In the present embodiment, the oil ring 14b is disposed on one end surface of the upper bearing metal 12, but an oil supply portion or an oil ring may be provided on the other end surface as well as the oil supply portion 13b and the oil ring 14b. .

Second Embodiment
Next, a second embodiment of the present invention will be described. Note that, in the present embodiment and the first embodiment, the corresponding parts are given the same reference numerals.

(Schematic configuration of oil ring type slide bearing 1)
FIG.2 and FIG.3 is a figure which shows schematic structure of the oil ring type slide bearing 1 which concerns on Embodiment 2 of this invention. Figure 2 is a cross-sectional view of the oil ring type sliding bearing 1 in the axial direction of the shaft 11, FIG. 3 is a X ₁ -X ₁ cross-sectional view taken along line of FIG.

  The oil ring type slide bearing 1 includes a shaft 11, an upper bearing metal 12, a lower bearing metal 13, an oil ring 14a, an oil ring 14b, an oil ring guide 15a, and an oil ring guide 15b. . The oil ring type slide bearing 1 is housed in a housing 21a as shown in FIG. 2 and FIG. The housing 21a is provided with a through hole penetrating in the axial direction of the shaft 11, and the oil ring type slide bearing 1 is held by the bearing holding portion 21b in the housing 21a so that the shaft 11 passes through the through hole. The housing 21 a and the bearing holding portion 21 b are integrally formed to constitute a bearing housing 21 surrounding the oil ring type slide bearing 1.

  The shaft 11 is rotationally driven by a driving device (not shown) such as a motor installed outside the housing 21a.

  The upper bearing metal 12 and the lower bearing metal 13 form a single cylindrical bearing metal by being integrally fixed with a bolt via the opposing joint surfaces. A metal layer made of a metal material such as white metal is provided on a sliding contact surface of each of the upper bearing metal 12 and the lower bearing metal 13 with the shaft 11. The metal layers of the upper bearing metal 12 and the lower bearing metal 13 rotatably support the shaft 11.

  The oil ring 14 a and the oil ring 14 b are rotatably suspended on the shaft 11. The lower part of each of the oil ring 14a and the oil ring 14b is immersed in the oil in the oil tank 22 as shown in FIG. As the shaft 11 rotates, the oil ring 14a and the oil ring 14b move along the shaft. The oil ring 14 a and the oil ring 14 b rotate together, whereby the oil stored in the oil tank 22 adheres to the oil ring and is scraped up above the shaft 11.

(Specific configuration of lower bearing metal 13)
FIG. 4 is a perspective view of a bearing metal in which the upper bearing metal 12 and the lower bearing metal 13 are integrated. The lower bearing metal 13 is composed of a lower bearing metal end 13a, a lower bearing metal end 13b, and a lower bearing metal central portion 13c. As shown in FIG. 3, the lower bearing metal end 13a is disposed at a position where the oil ring 14a is suspended by the shaft 11, and the lower bearing metal end 13b is disposed at a position where the oil ring 14b is suspended by the shaft 11. , Each has a role of oil supply. The lower bearing metal central portion 13 c is disposed to face the upper bearing metal 12. The lower bearing metal end 13a, the lower bearing metal end 13b, and the lower bearing metal center 13c are integrally formed of the same member. The upper surface of the lower bearing metal end 13 b has a function of an oil receiver for receiving oil, and an oil receiver 301 is further provided. The oil receiving port 301 has a function of receiving the oil scraped up by the oil ring 14b, storing it, and guiding it to the sliding contact surface.

  The oil receiving port 301 is formed on the upper surface of the lower bearing metal end portion 13b on the downstream side in the rotational direction, as viewed from the top of the shaft 11, as shown in FIG. The oil receiving port 301 communicates with the first oil supply path 303 formed on the sliding contact surface between the lower bearing metal central portion 13 c and the shaft 11 via the rotational direction path 302. The oil received by the oil receiving port 301 flows through the rotational direction path 302 and flows into the first oil supply path 303 as the shaft 11 rotates. The oil that has flowed into the first oil supply path 303 spreads to the sliding contact surface between the lower bearing metal central portion 13 c and the shaft 11.

  In addition, the oil receiving port 301 is in communication with the axial path 304 represented by a hidden line (broken line). The axial path 304 is formed by processing a groove to be the axial path 304 in the contact surface of the lower bearing metal central portion 13 c with the upper bearing metal 12. The oil received by the oil receiving port 301 flows into the second oil supply path 305 via the axial path 304. The oil that has flowed into the second oil supply path 305 flows into the first oil supply path 303 and spreads to the sliding contact surface between the bearing metal and the shaft 11.

  The oil ring 14b is suspended above the lower bearing metal end 13b to supply the oil scraped up by the oil ring 14b to the sliding contact surface between the shaft 11 and the bearing metal via the lower bearing metal end 13b. Since the lower bearing metal end portion 13b and the lower bearing metal central portion 13c are integrally formed, no step is generated between the sliding contact surface and the sliding contact between the shaft 11 and the bearing metal more smoothly. It can be supplied to the surface.

  The same applies to the lower bearing metal end 13a.

  Here, in the conventional bearing metal in which the groove for accommodating the oil ring is provided in the upper bearing metal, it is necessary to process the upper bearing metal in order to provide the groove in the upper bearing metal. At the time of this processing, distortion or the like occurs in the upper bearing metal, and as a result, there is a problem that the cylindricity of the upper bearing metal decreases. In addition, machining of the upper bearing metal requires a lot of cost and labor.

  On the other hand, in the case of the oil ring type slide bearing 1 in which the oil ring is disposed at the end face of the bearing metal, the oil ring 14a and the oil ring 14b are disposed at each end face of the upper bearing metal 12 (ie, the shaft of the shaft 11) Are disposed on the outside of the upper bearing metal 12 in the direction), which makes it unnecessary to provide the upper bearing metal 12 with a groove. For this reason, the groove processing of the upper bearing metal 12 as described above is not required, and as a result, the cylindricality of the upper bearing metal 12 does not decrease due to distortion of the upper bearing metal 12 or the like, and the cylindricality is easily Bearing metal that can be secured can be manufactured.

  In the present embodiment, the upper bearing metal 12 and the lower bearing metal central portion 13c are separately formed from different members, but the upper bearing metal 12 and the lower bearing metal central portion 13c are integrally formed of the same member. If it is molded, when it is integrally molded, a passage may be formed so as to penetrate a member constituting the bearing metal.

(Specific configuration of oil ring guide 15a and oil ring guide 15b)
As shown in FIG. 2 and FIG. 3, the oil ring guide 15 a and the oil ring guide 15 b are respectively axially suspended on the shaft 11 of the oil ring 14 a and the oil ring 14 b suspended on the shaft 11. It is a positioning member which determines a position. The oil ring guide 15a and the oil ring guide 15b are fixed to the end faces of the upper bearing metal 12 by screwing them into screw holes provided on the end faces of the upper bearing metal 12, respectively, and the oil ring 14a and the oil ring 14b Store. The oil ring guide 15a and the oil ring guide 15b are manufactured, for example, by sheet metal processing or the like. The oil ring guide 15a and the oil ring guide 15b also have a function of blocking oil and guiding the oil to the sliding contact surface of the shaft 11 and the bearing metal.

  As shown in FIG. 3, since the oil ring guide 15a and the oil ring guide 15b are respectively provided on the end faces of the upper bearing metal 12 facing each other, their shapes are in a plane symmetrical relationship with each other. It becomes. Therefore, in the following description of the oil ring guide 15a, only the oil ring guide 15a will be described using the respective drawings, and the description of the oil ring guide 15b will not be repeated.

  The oil ring guide 15 a and the end face of the upper bearing metal 12 constitute a space for housing the oil ring 14 a. In the oil ring type slide bearing 1, the oil ring guide 15a is disposed on the end face of the upper bearing metal 12, and the oil ring 14a is accommodated in the space formed by the end face of the upper bearing metal 12 and the oil ring guide 15a.

  As shown in FIG. 5, the oil ring guide 15 a is provided with a projection 16 a-1 projecting toward the inside of the above-described space. Similarly, the end face of the upper bearing metal 12 is also provided with a projection 16a-2 projecting toward the inside of the above-described space. For example, the projection 16a-1 is obtained by inserting the low head bolt 16A-1 through the bolt hole of the oil ring guide 15a and arranging its head (that is, the projection 16a-1) in the space. The shaft portion of the low head bolt 16A-1 is tightened with a nut outside the oil ring guide 15a. The projection 16a-2 is formed by screwing a low head bolt 16A-2 to the end face of the upper bearing metal 12 and arranging its head (that is, the projection 16a-2) in the above-mentioned space.

  The oil ring 14a is disposed between the projection 16a-1 and the projection 16a-2 during rotation and stop of the shaft, and the oil ring 14a and the projection 16a-2 form an oil ring. The space between the oil ring 14a and the oil ring guide 15a and the space between the oil ring 14a and the end face of the upper bearing metal 12 are respectively defined, and a space is formed on the side of the oil ring 14a. Thereby, the contact between the oil ring 14a and the oil ring guide 15a and the contact between the oil ring 14a and the end face of the upper bearing metal 12 are avoided. That is, the oil ring 14a comes in contact with only the protrusion 16a-1 and the protrusion 16a-2 during rotation. Thereby, the contact area of oil ring 14a and oil ring guide 15a is reduced. The reduction of the contact area reduces the resistance due to the contact during the rotation of the oil ring, and has the effect that the rotation of the oil ring 14a more smoothly follows the rotation of the oil ring 14a without being impeded.

  In addition to the low head bolt 16A-1 described above, a low head bolt 16C-1 is provided on the oil ring guide 15a, as shown in FIG. A low head bolt similar to the low head bolt 16A-2 is provided on the end face of the upper bearing metal 12 so as to face the low head bolt 16C-1. As described above, by supporting the oil ring 14a in the circumferential direction with two low-head bolts, the oil ring 14a is prevented from swinging in the axial direction in the above-described space, and the behavior at the time of rotation of the oil ring 14a is Stabilize. Depending on the operating conditions, such as the shape of the projection, the rotational speed of the shaft 11, the temperature of oil and outside air, etc., it may be possible to prevent the swinging motion of the oil ring 14a at only one location. In some cases, it may be preferable to support the oil ring 14a at a plurality of places, such as four places. The same applies to the oil ring 14b.

(Specific configuration of the oil ring guide 15a and the oil ring 14a)
Next, the space formed by the oil ring guide 15a and the oil ring 14a will be further described with reference to FIGS. 6, 7 and 8. FIG.

  FIG. 6 is a perspective view of the oil ring guide 15a. 7 and 8 are enlarged views of the shaft 11, the bearing metals (upper bearing metal 12, lower bearing metal 13), the oil ring 14a and the oil ring guide 15a. In FIG. 7 and FIG. 8, illustration of the other constituent members of the oil ring type slide bearing 1 is omitted up to the dashed-two dotted line portion for easy viewing of the drawings.

  As shown in FIG. 6, the oil ring guide 15 a is configured of a first member 151, a second member 152, a third member 153, a fourth member 154 and a fifth member 155. As shown in FIGS. 7 and 8, the shaft 11 is rotationally driven by a motor or the like in the direction of the arrow, and the oil ring 14 a rotates in the same arrow direction as the shaft 11 as the shaft 11 is rotationally driven.

  The first member 151 faces the upper surface of the oil ring 14a, the third member 153 faces the inner surface (inner peripheral surface) of the oil ring 14a, and the second member 152 and the fourth member 154 respectively receive the oil ring 14a. The oil ring guide 15a is attached to the end face of the upper bearing metal 12 so as to face the side surface of the upper bearing metal. The oil ring guide 15a is fixed to the end face of the upper bearing metal 12 by using a bolt or the like for the fifth member 155. Further, in the second member 152, a bolt hole 156 and a bolt hole 157 for passing the above-described low-head bolt 16A-1 and the like are opened.

The first member 151 faces the upper surface of the oil ring 14 a to form a space (hereinafter referred to as “first space”) 201 from the upstream side to the downstream side in the rotational direction of the top of the oil ring 14 a (see FIG. 9 (e), see FIG. 11). That is, as shown in FIG. 11, the first space 201 is located above the oil ring 14a near the top of the oil ring 14a in contact with the upper portion of the shaft 11. The first space 201 gradually narrows along the rotation direction of the first member 151 and has a narrowest portion. Specifically, it is shown in FIG. 9 and FIG. As shown in (a) of FIG. 9, the first space 201 changes to the cross sections O-Y ₁ , O-Y ₂ , and O-Y ₃ in the rotational direction. The distance between the first member 151 and the upper surface of the oil ring 14a changes so as to gradually narrow to a ₁ shown in (b), a ₂ shown in (c), a ₃ shown in (d), a ₃ Furthermore, it becomes the narrowest forward in the rotational direction. The distance between the upper surface of the oil ring 14a and the first member 151 is increased when passing through the narrowest portion. That is, the first space exists from the upstream side to the downstream side in the rotation direction of the top portion of the oil ring 14a, and the first space gradually forms a gradually decreasing space.

  The second member 152 is opposed to the side surface of the oil ring 14a to form a space 202 (hereinafter referred to as "second space") connected to the first space 201 (see (e) in FIG. 9). The second space 202 includes a space formed by the end faces of the second member 152 and the upper bearing metal 12 facing the side surface of the oil ring 14a, and is connected to the first space 201 and overflows with a space where oil spills out. It consists of the space where the oil which has been discharged is supplied to the bearing metal. The second space 202 consists of a third space 203 and a fourth space 204, as shown in FIG. Note that one side surface of the oil ring 14 a faces the second member 152 as described above, and the other side surface faces the end surface of the upper bearing metal 12. The end face of the upper bearing metal 12 forms a space connected to the first space 201 by facing the side surface of the oil ring 14 a as in the case of the second member 152. The space is also included in the second space 202 described above.

  The third member 153 is extended from the second member 152 in the axial direction of the oil ring 14a so as to face the inner surface of the oil ring 14a.

  The fourth member 154 faces the side surface of the oil ring 14a, and is positioned upstream in the rotational direction as a member of the oil ring guide 15a.

(Specific configuration of the first space 201 and the second space 202)
Hereinafter, an operation of retaining oil in the first space 201 and the second space 202 and guiding the oil to the sliding contact surface of the shaft 11 and the bearing metal will be described. As the shaft 11 rotates, the oil ring 14 a rotates with it, and the oil stored in the oil tank 22 adheres to the oil ring 14 a and is scraped up above the shaft 11. When the oil attached to the upper surface of the oil ring 14a starts to pass through the first space 201, the oil starts from the narrowest portion of the first space 201, which gradually narrows along the rotational direction. You can stop it. The dammed oil will gradually spill out of the first space 201. That is, by stopping the oil returned to the inside of the oil tank 22 while adhering to the oil ring 14a in the conventional case, the scraped oil is not returned to the oil tank 22 as it is, but the lower bearing from the side of the oil ring 14a. It can be supplied to the metal 13.

  The oil retained in the first space 201 has a viscosity in the first space 201, a rotational speed of the oil ring 14a, and the like, and is viewed from the top of the oil ring 14a in the first space 201 from the downstream side in the rotational direction. It may overflow or may overflow from the upstream side in the rotational direction as viewed from the top of the oil ring 14a.

  The second space 202 is a space in which the end faces of the second member 152 and the upper bearing metal 12 face the side surface of the oil ring 14 a, and the oil overflows from the first space 201 and is supplied to the bearing metal. The second space 202 comprises a third space 203 and a fourth space 204.

  The third space 203 is a space formed by the side surface of the oil ring 14 a and the oil ring guide 15 a in the second space 202. By providing the first member 151, the oil leaking from the first space 201 closes the passage in the circumferential direction and falls downward. The third space 203 is located in such a direction in which the oil leaks from the first space 201, and the majority of the oil leaking from the first space 201 passes through the third space 203 and is made by the second member 152, It is guided to the fourth space 204.

  The second member 152 has a small distance to the extent that a small clearance (about several mm) is left in the radial direction according to the shape of the main shaft. By doing this, the oil which is about to overflow in the axial direction is blocked by the second member 152 except for the clearance of several mm, so the oil is supplied from the fourth space 204 to the sliding contact surface of the shaft 11 and the bearing metal. Oil volume increases. Thus, the second member 152 also greatly contributes to the guidance from the third space 203 to the fourth space 204.

  As described above, the distance (the distance between the oil ring 14a and the oil ring guide 15a and the distance between the oil ring 14a and the end face of the upper bearing metal 12) in the axial direction of the shaft 11 in the third space 203 is The positioning of the oil ring 14a in the axial direction by the projection 16a-1 and the projection 16a-2 respectively defines the oil ring 14a.

  The fourth space 204 is a space connecting the third space 203 and the lower bearing metal 13, particularly the lower bearing metal end 13a which is an oil supply portion. The oil overflowing from the first space 201 to the third space 203 is supplied to the lower bearing metal 13 via the fourth space 204.

  Here, the third member 153 included in the fourth space 204 is extended in the axial direction of the oil ring 14 a from the second member 152 so as to face the inner surface of the oil ring 14 a. The oil overflowing into the second space 202 (third space 203) is guided to the lower bearing metal 13. The oil scraped up by the oil ring 14a has a tangential force of the oil ring 14a due to the centrifugal force caused by the rotation of the oil ring 14a moving along the shaft 11, so the oil is viewed downward from the top of the oil ring Some are not supplied to the lower bearing metal 13 and scatter into the oil tank 22 and return to the inside of the oil tank 22 again. The third member 153 is vertically disposed in the upper portion (directly above in the present embodiment) of the oil receiving port 301 (see FIG. 4). As a result, the oil jumping out of the third space 203 loses the speed in the tangential direction by hitting the third member 153 in the fourth space, and the passage in the circumferential direction is closed and falls downward. It is easy to be guided to the lower bearing metal 13 located directly under.

  The fourth member 154 faces the side surface of the oil ring 14a, and is positioned upstream in the rotational direction as a member of the oil ring guide 15a. The oil adhering to the oil ring 14 a and going from the lower side to the upper side may fall off the oil ring 14 a before entering the first space 201. In that case, the oil which falls off from the oil ring 14a is returned to the oil tank 22 as it is by gravity and is not used as a lubricating oil. Therefore, the fourth member 154 has a shape curving outward in the direction opposite to the side facing the oil ring 14a, and the oil is easily guided to the first space 201 by providing a wide inlet.

  As described above, according to the oil ring type slide bearing 1 according to the present embodiment, when the oil attached to the oil ring 14a starts to pass through the first space 201 by the rotation of the oil ring 14a, the oil has a rotational direction Starting from the narrowest portion of the first space 201 which narrows gradually along the length of the first space 201, and overflows from the first space 201 to the second space 202. Therefore, in the conventional case, the oil returned to the inside of the oil tank 22 can be supplied from the side surface of the oil ring 14a to the lower bearing metal 13 again while adhering to the oil ring 14a.

Further, as shown in FIG. 10, similarly to the first space 201, the second space 202 may be a gradually decreasing space in which a portion (third space 203) of the second space 202 gradually narrows along the rotation direction of the oil ring 14a. Second space 202, as (a), in the rotating direction, changes in cross section _{O-Z 1, O-Z} 2, O-Z 3. Distance side surface of the second member 152 and the oil ring 14a is, _b 1 shown in (b), _b 2 of (c), the change with _{b 3} to (d), the most rotated further forward of _{b 3} It becomes narrow. Similarly, the distance between the end face of the upper bearing metal 12 and the side surface of the oil ring 14a changes from c ₁ shown in (b), c ₂ shown in (c), c ₃ shown in (d), and c ₃ Furthermore, it becomes the narrowest forward in the rotational direction. When the oil attached to the side surface of the oil ring 14a starts to pass through the second space 202 due to the rotation of the oil ring 14a, the oil narrows the narrowest portion of the second space 202, which gradually narrows along the rotational direction. It can be stopped as a starting point. Similar to the first space 201, the second space 202 can also supply such an oil to the lower bearing metal 13.

  In the present embodiment, the tapering space for gradually narrowing the first space 201 or the second space 202 has been described, but as described above, both the first space 201 and the second space 202 rotate the oil ring 14a. It may be made to narrow gradually along the direction.

  In the present specification, the upper surface and the side surface of the oil ring 14a are collectively referred to as "the outer surface".

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and embodiments obtained by appropriately combining the technical means disclosed in the different embodiments. Is also included in the technical scope of the present invention.

  For example, as shown in FIG. 5, a low head bolt 16A-1 is passed through the bolt hole of the oil ring guide 15a, and a projection 16a-1 which is the head of the low head bolt 16A-1 is disposed in the space. Instead of such a projection 16a-1, as shown in FIG. 12, for example, the oil ring guide 15a made of a thin plate metal such as a steel plate, a stainless steel plate, or an aluminum plate is punched by a press machine. 18 may be provided. Alternatively, the projection may be provided by cutting and raising by laser processing or the like. Of course, the oil ring guide 15a may be formed using a resin instead of the thin plate metal as described above.

  The lower bearing metal end 13a, the lower bearing metal end 13b, and the lower bearing metal central portion 13c may be separately formed of different members. When each is separately formed, for example, the lower bearing metal end 13a and the lower bearing metal end 13b are respectively set screws in screw holes provided in respective end faces of the lower bearing metal central portion 13c. The screw may be fixed to each end face by screwing or the like. Even if the lower bearing metal end 13a, the lower bearing metal end 13b, and the lower bearing metal center 13c are separately formed, the lower bearing metal center 13c and the upper bearing metal 12 are the same. You may integrally mold with a member. The point is that the oil supply portion (lower bearing metal end 13a and lower bearing metal end 13b) extends along the axial direction of the shaft 11 to a position where the oil ring 14a and the oil ring 14b are suspended on the shaft 11. It should just exist.

  Furthermore, although the lower bearing metal end 13b is adapted to the shape of the lower bearing metal central portion 13c, it is not limited to this. For example, although the lower bearing metal end 13b is semicircular in FIG. 4, it may be a circular arc of about 1⁄4 or the like. However, even in such a case, the end 306 of the lower bearing metal end 13 b rotates more than the first oil supply path 303 in order to prevent oil from leaking beyond the lower bearing metal end 13 b and out of the bearing metal. It is preferable to be located upstream in the direction. The same applies to the lower bearing metal end 13a.

  In each of the above-mentioned embodiments, although the tapering space has been described to be formed using the oil ring guide, it may be formed using a part of the housing and bearing metal instead of the oil ring guide, and furthermore, air may be formed. An air that is called a wall may form a space that functions similarly.

  In each of the above-described embodiments, the oil receiver has been described as the oil receiver on the upper surface of the lower bearing metal end portion 13a which is the oil supply unit, but a configuration without an oil receiver may be used. Since oil is difficult to accumulate without the oil receiving port, it is better to have the oil receiving port.

  In each of the above-described embodiments, the oil supply path is provided in either the rotational direction or the axial direction. However, as the shaft rotates, oil is drawn to the sliding contact surface, so the oil supply path There may be no configuration. In addition, if there is an oil supply path, the supply of oil to the sliding contact surface is better, so that the configuration is better.

  The present invention can be used for an oil ring type slide bearing.

Reference Signs List 1 oil ring type slide bearing 11 shaft 12 upper bearing metal 13 lower bearing metal 13a lower bearing metal end (oil supply portion)
13b Lower bearing metal end (oil supply part)
13c lower bearing metal central portion 14a oil ring 14b oil ring 15a oil ring guide 15b oil ring guide 16 low head bolt 16a-1 projection 16a-2 projection 18 projection 21 bearing housing 21a housing 21b bearing holder 22 oil tank 151 first Member 152 second member 153 third member 154 fourth member 155 fifth member 156 bolt hole 157 bolt hole 201 first space 202 second space 203 third space 204 fourth space 301 oil receptacle 302 rotational direction path 303 first Oil supply path 304 Axial path 305 Second oil supply path 306 End

Claims (7)

Axis,
A bearing metal for supporting the shaft;
An oil ring suspended on the shaft and scraping oil below the shaft;
An oil supply located at an axial end of the shaft of the bearing metal;
An oil ring type slide bearing characterized in that the oil ring is suspended on the shaft above the position where the oil supply portion is present. The oil supply unit receives an oil that is scraped up above the position where the oil supply unit is present by the oil ring, and that drops from above the position where the oil supply unit is present onto the upper surface of the oil supply unit The oil ring type slide bearing according to claim 1, which functions as a bearing.   The oil ring type slide bearing according to claim 1 or 2, further comprising a supply path for guiding oil to a sliding contact surface between the shaft and the bearing metal.   The oil ring according to claim 3, wherein the supply path includes at least one of a rotational direction path extending in the rotational direction of the shaft and / or an axial path extending in the axial direction of the shaft. Type sliding bearing. The oil supply unit receives an oil that is scraped up above the position where the oil supply unit is present by the oil ring, and that drops from above the position where the oil supply unit is present onto the upper surface of the oil supply unit Have a socket,
The oil ring type slide bearing according to claim 3 or 4, wherein the oil receiving port communicates with the supply path.   The oil ring type slide bearing according to any one of claims 1 to 5, further comprising a positioning portion which determines the position of the oil ring in the axial direction of the shaft. Axis,
A bearing metal for supporting the shaft;
An oil ring suspended on the shaft and scraping oil below the shaft;
An oil supply disposed at an axial end of the shaft of the bearing metal;
A positioning portion for determining the position of the oil ring in the axial direction of the shaft;
Equipped with
The oil ring is suspended on the shaft at a position where the oil supply portion exists,
The positioning portion has a facing portion facing the outer surface of the oil ring, and the distance between the outer surface of the oil ring and the facing portion is narrowed along the rotation direction of the oil ring. features and to Luo Iruringu formula sliding bearing to be placed.

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