Journal bearings and rotating equipment

Abstract

The oil drain port (6) extending from the inner circumferential surface of the bearing ring (1) to the outer circumferential surface is configured in at least two of the following ranges: a range from 180 degrees to 360 degrees and from the position of the vertical height (L1) of the downstream pivot (32) to the position of the highest vertical height (L3) of the rotating shaft (101); and a range from 0 degrees to 180 degrees and from the position of the vertical height (L2) of the upstream pivot (31) to the position of the highest vertical height (L3) of the rotating shaft (101).

Description

Technical Field

[0001] This application relates to journal bearings and rotating equipment. Background Technology

[0002] Conventional journal bearings are bearing assemblies that support a rotating shaft by using multiple bearing bushes arranged at intervals in the direction of rotation of the rotating shaft. To adjust the amount of oil (lubricating oil) retained in the bearing area where the bearing bushes are located, an oil drain adjustment valve with an opening and closing drain hole is provided. For example, Patent Document 1 describes a device that opens the drain hole during high-speed rotation to reduce the amount of oil retained, thereby reducing agitation losses caused by the stirring of oil in the bearing area as the rotating shaft rotates.

[0003] Prior technical documents

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2009-185875 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] Previous journal bearings and rotating equipment had the following problems: when the amount of oil in the bearing area was reduced to reduce stirring loss, there was insufficient oil in the gap between the outer circumferential surface of the rotating shaft and the inner circumferential surface of the bearing bush. The oil film pressure generated in the gap was always or briefly reduced, and the unstable vibration of the bearing bush and rotating shaft increased.

[0008] This application discloses a technique for solving the aforementioned problems, with the aim of providing a journal bearing and a rotating device for suppressing unstable vibrations of the bearing bush and rotating shaft.

[0009] Solution for solving the problem

[0010] The journal bearing disclosed in this application is a journal bearing for supporting the rotating shaft of a rotating device, wherein...

[0011] The journal bearing comprises:

[0012] Bearing rings are arranged at intervals on the outer periphery of the rotating shaft;

[0013] The upstream and downstream bearings are arranged with the lower half of the bearing ring located on the load direction side of the rotating shaft as the lower half. The upstream and downstream bearings are arranged at different circumferential positions between the inner circumferential surface of the lower half of the bearing ring and the outer circumferential surface of the rotating shaft. The upstream bearing is located on the rear side of the rotating shaft in the rotation direction, and the downstream bearing is located on the front side of the rotating shaft in the rotation direction.

[0014] An upstream pivot allows the upstream bearing to be pivotally supported on the inner circumferential surface of the bearing ring;

[0015] A downstream pivot that allows the downstream bearing to be pivotally supported on the inner circumferential surface of the bearing ring; and

[0016] Side plates surround the upstream bearing and the downstream bearing at their respective axial ends.

[0017] The bearing ring has multiple oil drain ports extending from the inner circumferential surface to the outer circumferential surface in the circumferential direction.

[0018] In a section perpendicular to the axial direction of the journal bearing, if the upper end in the load direction of the rotational direction is set to 0 degrees, the lower end to 180 degrees, and further, the upper end to 360 degrees,

[0019] The drain port is disposed in at least two of the following ranges of the bearing ring: a range from 180 degrees to 360 degrees, extending from the vertical height of the downstream pivot to the highest vertical height of the rotating shaft; and a range from 0 degrees to 180 degrees, extending from the vertical height of the upstream pivot to the highest vertical height of the rotating shaft.

[0020] Furthermore, the rotating device disclosed in this application has the following features:

[0021] The journal bearing; and

[0022] The rotating shaft is supported by the journal bearing.

[0023] The effects of the invention

[0024] The journal bearing and rotating device disclosed in this application can suppress unstable vibrations of the bearing bush and rotating shaft. Attached Figure Description

[0025] Figure 1 This is a cross-sectional view of the journal bearing of Embodiment 1, perpendicular to the axial direction.

[0026] Figure 2 yes Figure 1 The AA-line sectional view of the journal bearing shown.

[0027] Figure 3 This is a cross-sectional view of the journal bearing of Embodiment 2, perpendicular to the axial direction.

[0028] Figure 4 This is a cross-sectional view of the journal bearing of Embodiment 3, perpendicular to the axial direction.

[0029] Figure 5yes Figure 4 The BB line sectional view of the journal bearing shown.

[0030] Figure 6 This is a cross-sectional view of the journal bearing of embodiment 4, perpendicular to the axial direction.

[0031] Figure 7 yes Figure 6 The shown is a cross-sectional view along the CC line of the journal bearing.

[0032] Figure 8 This is a cross-sectional view of the journal bearing of embodiment 5, perpendicular to the axial direction.

[0033] Figure 9 This is a cross-sectional view of the journal bearing of embodiment 6, perpendicular to the axial direction.

[0034] Figure 10 This is a cross-sectional view of the journal bearing of embodiment 7, perpendicular to the axial direction.

[0035] Figure 11 This is a cross-sectional view of the journal bearing of embodiment 8, perpendicular to the axial direction.

[0036] Figure 12 This is a cross-sectional view of the journal bearing of embodiment 9, perpendicular to the axial direction.

[0037] Figure 13 This is a cross-sectional view of a rotating device using the journal bearing of Embodiment 10.

[0038] Figure 14 This is a cross-sectional view of a rotating device using the journal bearing of embodiment 11.

[0039] Figure 15 This is a cross-sectional view of a rotating device using the journal bearing of embodiment 11.

[0040] Figure 16 This is a block diagram of the control unit of the journal bearing in Embodiments 9 to 11. Detailed Implementation

[0041] The journal bearing shown in the following embodiments is a sliding bearing that rotatably supports a rotating shaft. Furthermore, this journal bearing is suitable for various rotating devices such as rotary motors.

[0042] Implementation Method 1

[0043] Figure 1 This is a cross-sectional view showing the structure of the journal bearing 100 according to Embodiment 1. Figure 1 This indicates that the journal bearing 100 and the rotating device 1000 will be described in the following embodiments. (Refer to...) Figure 13The cross section of the rotating shaft 101 after being cut by a plane perpendicular to the axis Q of the rotating shaft 101. Figure 1 The vertical direction on the paper represents the vertical direction. Figure 2 yes Figure 1 The AA-line sectional view of the journal bearing 100 shown.

[0044] like Figure 1 and Figure 2 As shown, the journal bearing 100 has an overall annular shape. A rotating shaft 101 is inserted into the journal bearing 100. The journal bearing 100 is configured to rotatably support the rotating shaft 101. The axis Q of the rotating shaft 101 extends in the horizontal direction. Figure 1 In this embodiment, the rotation direction H of the rotation axis 101 is counterclockwise. The side in front of the rotation direction H is designated as the front side H1, and the side behind the rotation direction H is designated as the rear side H2. In the following description, the front side H1 and the rear side H2 of the rotation direction H are described with reference to the object portion. Furthermore, the vertical direction G of the rotation axis 101 is designated as the lower side G1 and the upper side G2. In the following embodiments, these directions are also appropriately represented in the same figures.

[0045] The direction parallel to the axis Q of the rotation axis 101 is denoted as axial direction Y, and the circumferential direction centered on axis Q is denoted as circumferential direction Z. Furthermore, the above directions are the same as the circumferential direction Z and axial direction Y of the rotating device 1000, and these directions are also used as a reference for the description of directions Y and Z in other parts.

[0046] The journal bearing 100 includes a bearing ring 1, an upstream bearing shell 21, a downstream bearing shell 22, and a side plate 4. The bearing ring 1 is disposed on the outer circumferential side of the rotating shaft 101. In the bearing ring 1, the portion located on the lower side G1 (load direction side) of the rotating shaft 101 is designated as the lower half 11, and the portion located on the upper side G2 (load opposite direction side) is designated as the upper half 12. The upstream bearing shell 21 and the downstream bearing shell 22 are disposed between the lower half 11 and the outer circumferential surface of the rotating shaft 101. Figure 2 As shown, the side plates 4 are respectively provided in a manner that surrounds both ends of the bearing region T in the axial direction Y. Furthermore, as an example, the side plates 4 need only be formed at least at both ends of the upstream bearing shell 21 and the downstream bearing shell 22 in a manner that surrounds each end.

[0047] The upstream bearing 21 and the downstream bearing 22 are positioned at different locations along the outer circumferential surface of the rotation axis 101 in the circumferential direction Z. The upstream bearing 21 is spaced apart in the circumferential direction Z and positioned behind the downstream bearing 22 on the rear side H2 of the rotation direction H. An upstream pivot 31 is provided on the outer circumferential surface of the upstream bearing 21, which pivotally supports the upstream bearing 21 on the inner circumferential surface of the bearing ring 1. A downstream pivot 32 is provided on the outer circumferential surface of the downstream bearing 22, which pivotally supports the downstream bearing 22 on the inner circumferential surface of the bearing ring.

[0048] Through these pivots 31, 32, each bearing shell 21, 22 is configured to tilt freely relative to the outer peripheral surface of the rotating shaft 101. A journal bearing 100 having such an upstream bearing shell 21 and downstream bearing shell 22 is generally referred to as a tilting bearing journal bearing. Furthermore, the journal bearing 100 includes a guide metal member 13 disposed between the upper half 12 of the bearing ring 1 and the outer peripheral surface of the rotating shaft 101. The guide metal member 13 prevents the rotating shaft 101 from jumping upwards to the G2 side due to vibration or other influences.

[0049] The journal bearing 100 has a region (hereinafter referred to as bearing region T) between the outer peripheral surface of the rotating shaft 101 and the inner peripheral surface of the bearing ring 1, which is surrounded in the axial direction Y by side plates 4 at both ends. In addition, the journal bearing 100 has a plurality of oil supply nozzles 5 extending inward from the bearing ring 1 to supply oil (lubricating oil) to the bearing region T.

[0050] The bearing ring 1 has a plurality of oil drain ports 61, 62, 63, 64, 65, 66, and 67 arranged in the circumferential direction Z. Alternatively, when only one oil drain port is indicated, it is referred to as oil drain port 6. Oil drain port 6 is, for example, a through hole extending from the inner circumferential surface of the bearing ring 1 to the outer circumferential surface, and is a hole for discharging oil from the bearing region T to the outside of the bearing ring 1.

[0051] First of all, Figure 1 In the section perpendicular to the axial direction Y of the journal bearing 100, i.e., the axial direction Y of the rotation shaft 101, the upper end Z11 in the load direction of the rotation direction H is set to 0 degrees, the lower end Z12 is set to 180 degrees, and the upper end Z11 is set to 360 degrees for explanation. Furthermore, this content is the same in the following embodiments, so its description is appropriately omitted.

[0052] like Figure 1 As shown, oil drain ports 62, 63, and 64 are formed in a range H1 ahead of the upstream pivot 31 in the rotational direction H of the rotation axis 101 and H2 behind the downstream pivot 32 in the rotational direction H of the rotation axis 101. This range is... Figure 1 The circumferential range Z from arrow Z10 to arrow Z20. Additionally, the positions of the upstream pivot 31 and the downstream pivot 32 refer to the fulcrum locations relative to the inner circumferential surface of the bearing ring 1.

[0053] Furthermore, oil drain ports 65, 66, and 67 are formed within a range of 180 degrees to 360 degrees, extending from the vertical height L1 of the downstream pivot 32 to the highest vertical height L3 of the rotating shaft 101. Additionally, the range of 180 degrees to 360 degrees refers to... Figure 1 The right half of the paper surface, from the lower end Z12 to the upper end Z11.

[0054] Furthermore, the oil drain port 61 is formed within a range of 0 to 180 degrees, extending from the vertical height L2 of the upstream pivot 31 to the highest vertical height L3 of the rotating shaft 101. The range of 0 to 180 degrees refers to... Figure 1 The left half of the paper surface, from the upper end Z11 to the lower end Z12.

[0055] The three ranges referred to here are ranges divided into three parts along the circumferential direction Z at circumferential positions Z1, Z2, and Z3. In this embodiment 1, an oil drain port 6 is provided in the entire range of these three ranges. Alternatively, it is also possible to form the oil drain port 6 in any two of these three ranges. However, in each range from circumferential position Z1 to circumferential position Z2 and from circumferential position Z1 to circumferential position Z3, as described above, the case where the oil drain port 6 is formed on the side G2 above the vertical height L3 is excluded.

[0056] The flow of oil between the journal bearing 100 and the rotating shaft 101 in Embodiment 1, as described above, will be explained. Most of the oil supplied from the oil supply nozzle 5 to the bearing region T flows in the same direction as the rotation direction H of the rotating shaft 101 due to the shear force caused by the rotation of the rotating shaft 101. A portion of this oil flows between the outer circumferential surface of the rotating shaft 101 and the inner circumferential surfaces of each bearing shell 21, 22. When the bearing region T is filled with oil, an oil film forms in the gap between the components. This oil film is sheared by the rotation of the rotating shaft 101, thereby generating oil film pressure on the outer circumferential surface of the rotating shaft 101 and the inner circumferential surfaces of each bearing shell 21, 22.

[0057] When the rotating shaft 101 rotates at high speeds, the rotating shaft 101 and each bearing bush 21, 22 are supported non-contactly by utilizing the oil film pressure. Furthermore, a portion of the oil supplied from the oil supply nozzle 5 or oil leaking from the gap between the outer circumferential surface of the rotating shaft 101 and the inner circumferential surface of each bearing bush 21, 22 accumulates in other bearing areas T. The churning loss (hereinafter referred to as churning loss) caused by the stirring of the oil in bearing area T generated by the journal bearing 100 increases proportionally to the contact area between the outer circumferential surface of the rotating shaft 101 and the oil accumulated in bearing area T as the rotating shaft 101 rotates.

[0058] As the rotating shaft 101 rotates, a portion of the oil accumulated in the bearing region T is re-supplied and circulated between the outer circumferential surface of the rotating shaft 101 and the inner circumferential surfaces of the bearing shells 21, 22. A portion of the remaining oil passes through the gap between the side plate 4 and the outer circumferential surface of the rotating shaft 101 (e.g., ...). Figure 2 The oil is discharged outside the journal bearing 100 (as shown by the part S surrounded by the dotted line), and a portion of the other oil is discharged outside the journal bearing 100 through the oil drain port 6.

[0059] Next, the function of the oil drain port 6 will be explained. In a typical tilting bearing journal, oil accumulates sequentially from the lower side G1 of the bearing region T, resulting in oil accumulation on the lower side G1 of the bearing region T and air accumulation above the upper side G2 of the bearing region T. When the rotating shaft 101 rotates, the air accumulated on the upper side G2 of the bearing region T, behind the upstream bearing 21 in the rotation direction H, flows towards the front side H1 in the rotation direction H due to the shear force generated by the rotation of the rotating shaft 101. Similarly, the oil accumulated on the lower side G1 of the bearing region T, in front of the downstream bearing 22 in the rotation direction H, flows towards the front side H1 in the rotation direction H due to the shear force generated by the rotation of the rotating shaft 101.

[0060] Therefore, the height of the oil-air interface (hereinafter referred to as the oil level) tends to decrease on the rear side (H2) of the upstream bearing 21 in the direction of rotation H, and tends to increase on the front side (H1) of the downstream bearing 22 in the direction of rotation H. Agitation losses occur on the outer circumferential surface of the rotating shaft 101, which is below the oil level. The agitation loss is proportional to the oil level. For example, in the bearing journal bearing with an oil drain port of Patent Document 1, when the oil level is lowered through the drain port, the contact area between the outer circumferential surface of the rotating shaft and the oil decreases, which reduces agitation losses. However, the oil level in the bearing area between the outer circumferential surface of the rotating shaft and the inner circumferential surface of the bearing becomes lower, resulting in insufficient oil in each gap. The oil film pressure decreases consistently or temporarily, increasing the unstable vibration of the bearing and the rotating shaft.

[0061] On the other hand, Figure 1 In the illustrated embodiment 1, the oil drain port 6 is disposed in at least two of the following ranges: a range located in front of the upstream pivot 31 in the rotation direction H of the rotation shaft 101 at H1 and behind the downstream pivot 32 in the rotation direction H of the rotation shaft 101 at H2; a range of 180 degrees to 360 degrees, from the position of the vertical height L1 of the downstream pivot 32 to the position of the highest vertical height L3 of the rotation shaft 101; and a range of 0 degrees to 180 degrees, from the position of the vertical height L2 of the upstream pivot 31 to the position of the highest vertical height L3 of the rotation shaft 101.

[0062] Furthermore, the upstream pivot 31 connects the bearing ring 1 and the upstream bearing bush 21, and the downstream pivot 32 connects the bearing ring 1 and the downstream bearing bush 22. Therefore, at the circumferential Z position of the upstream pivot 31 or the downstream pivot 32, there is no oil flow path, or it is very narrow. Consequently, the amount of oil moving through the circumferential Z position of the upstream pivot 31 or the downstream pivot 32 is very small. In addition, due to the influence of gravity, the amount of oil moving through the circumferential Z position on the upper side G2 of the rotating shaft 101 is also small.

[0063] Therefore, the oil accumulated in the bearing region T is divided into three parts along the circumferential direction Z, centered on the axis Q of the rotating shaft 101, at the circumferential position Z2 of the upstream pivot 31, the circumferential position Z3 of the downstream pivot 32, and the circumferential position Z1 of the side above G2 in the vertical direction G of the rotating shaft 101. According to this embodiment, since at least two of the three parts of the oil can be discharged through the oil drain port 6, the oil level distribution can be adjusted according to the regions along the circumferential direction Z.

[0064] That is, according to Embodiment 1, the oil level height J1 on the rear side H2 of the upstream bearing 21 in the rotation direction H, the oil level height J2 between the ends of the upstream bearing 21 and the downstream bearing 22 facing each other in the circumferential direction Z, and the oil level height J3 on the front side H1 of the downstream bearing 22 in the rotation direction H can be adjusted separately. Furthermore, examples of each oil level height J1, J2, and J3 are given below. Figure 4 The example shown is for reference only.

[0065] For example, if the oil drain ports 62, 63, and 64 are located at a position H1 in front of the rotation direction H of the rotation axis 101, which is closer to the upstream pivot 31, and at a position H2 in rear of the rotation direction H of the rotation axis 101, which is closer to the downstream pivot 32, and the oil drain ports 65, 66, and 67 are located within a range of 180 degrees to 360 degrees, from the position of the vertical height L1 of the downstream pivot 32 to the position of the highest vertical height L3 of the rotation axis 101, then the oil level J2 between the upstream bearing 21 and the downstream bearing 22 and the oil level J3 at the front of the rotation direction H of the downstream bearing 22 can be adjusted independently.

[0066] Therefore, the oil level height J3 on the front side H1 of the rotation direction H of the downstream bearing 22, which is prone to oil level rise due to the rotation of the rotating shaft 101, can be greatly reduced, and the oil level height J2 between the upstream bearing 21 and the downstream bearing 22 can be maintained to a degree that fills the gap between the inner circumferential surface of the downstream bearing 22 and the outer circumferential surface of the rotating shaft 101 with oil.

[0067] For example, if the oil drain ports 62, 63, and 64 are formed at positions located in front of the upstream pivot 31 in the direction of rotation H of the rotation axis 101 and behind the downstream pivot 32 in the direction of rotation H of the rotation axis 101, and the oil drain port 61 is formed in the range of 0 degrees to 180 degrees and in the range from the vertical height L2 of the upstream pivot 31 to the highest vertical height L3 of the rotation axis 101, then the oil level J2 between the upstream bearing 21 and the downstream bearing 22 and the oil level J1 behind the upstream bearing 21 in the direction of rotation H of the rotation H can be adjusted respectively.

[0068] Therefore, the oil level height J2 between the upstream bearing 21 and the downstream bearing 22 can be reduced to the extent that the oil fills the gap between the inner circumferential surface of the downstream bearing 22 and the outer circumferential surface of the rotating shaft 101. Furthermore, the oil level height J1 on the rear side H2 of the upstream bearing 21 in the rotation direction H, where the oil level is easily reduced due to the rotation of the rotating shaft 101, can be maintained to the extent that the oil fills the gap between the inner circumferential surface of the upstream bearing 21 and the outer circumferential surface of the rotating shaft 101.

[0069] Additionally, for example, if the oil drain ports 65, 66, and 67 are formed in the range of 180 degrees to 360 degrees and from the position of the vertical height L1 of the downstream pivot 32 to the position of the highest vertical height L3 of the rotating shaft 101, and the oil drain port 61 is formed in the range of 0 degrees to 180 degrees and from the position of the vertical height L2 of the upstream pivot 31 to the position of the highest vertical height L3 of the rotating shaft 101, then the oil level height J3 of the front side H1 of the rotation direction H of the downstream bearing 22 and the oil level height J1 of the rear side H2 of the rotation direction H of the upstream bearing 21 can be adjusted separately.

[0070] Therefore, the oil level height J3 on the front side H1 of the downstream bearing 22 in the rotation direction H, which is prone to rising due to the rotation of the rotating shaft 101, can be significantly reduced, and the oil level height J1 on the rear side H2 of the upstream bearing 21 in the rotation direction H, which is prone to falling due to the rotation of the rotating shaft 101, can be maintained to a degree that fills the gap between the inner circumferential surface of the upstream bearing 21 and the outer circumferential surface of the rotating shaft 101.

[0071] Furthermore, since each oil drain port 6 is positioned lower than the highest vertical height L3 in the rotating shaft 101, the contact area between the oil accumulating sequentially from the lower side G1 and the outer peripheral surface of the rotating shaft 101 can be reliably reduced. According to this embodiment, by adjusting the oil level distribution in the bearing region T according to the range of the circumferential direction Z, the decrease in the oil level height J1 on the rear side H2 in the rotational direction H is suppressed in the gap between the outer peripheral surface of the rotating shaft 101 and the inner peripheral surface of the bearing bush 2, and the oil level heights J2 and J3 in other directions are also reduced, thereby reducing the contact area between the outer peripheral surface of the rotating shaft 101 and the oil accumulated in the bearing region T. This suppresses unstable vibrations of the rotating shaft 101 and each bearing bush 21, 22, and minimizes churning losses.

[0072] According to the journal bearing of Embodiment 1 constructed as described above,

[0073] The aforementioned journal bearing supports the rotating shaft of the rotating equipment, wherein,

[0074] The aforementioned journal bearings have the following features:

[0075] Bearing rings are arranged at intervals on the outer periphery of the aforementioned rotating shaft;

[0076] The upstream and downstream bearings are arranged at different circumferential positions between the inner circumferential surface of the lower half of the bearing ring and the outer circumferential surface of the rotating shaft. The upstream bearing is located on the rear side of the rotating shaft in the rotation direction, and the downstream bearing is located on the front side of the rotating shaft in the rotation direction.

[0077] An upstream pivot provides a pivotal support for the upstream bearing bush on the inner circumferential surface of the bearing ring.

[0078] The downstream pivot provides pivotal support to the downstream bearing shell on the inner circumferential surface of the bearing ring; and

[0079] The side plates surround the upstream and downstream bearings at their respective axial ends.

[0080] The aforementioned bearing ring has multiple oil drain ports extending from the inner circumferential surface to the outer circumferential surface in the circumferential direction.

[0081] In a section perpendicular to the axial direction of the aforementioned journal bearing, if the upper end in the load direction of the rotational direction is set to 0 degrees, the lower end to 180 degrees, and further, the upper end to 360 degrees,

[0082] The aforementioned oil drain port is disposed in at least two of the following ranges: a range in front of the aforementioned bearing ring in the direction of rotation of the aforementioned rotating shaft compared to the aforementioned upstream pivot and a range in the direction of rotation of the aforementioned rotating shaft compared to the aforementioned downstream pivot; a range of 180 degrees to 360 degrees and a range from the vertical height of the aforementioned downstream pivot to the highest vertical height of the aforementioned rotating shaft; and a range of 0 degrees to 180 degrees and a range from the vertical height of the aforementioned upstream pivot to the highest vertical height of the aforementioned rotating shaft.

[0083] Therefore, by using the oil drain port, the oil level distribution in the bearing area can be adjusted according to the circumferential range. In the gap between the outer circumferential surface of the rotating shaft and the inner circumferential surface of each bearing bush, the reduction of the oil level height on the rear side of the upstream bearing bush in the direction of rotation can be suppressed, thereby reducing the oil level height in other areas and reducing the contact area between the outer circumferential surface of the rotating shaft and the oil accumulated in the bearing area. Thus, the unstable vibration of each bearing bush and the rotating shaft can be suppressed, and the stirring loss can be minimized.

[0084] Implementation Method 2

[0085] Figure 3 This is a cross-sectional view of the journal bearing 100 of Embodiment 2, perpendicular to the axial direction Y. Furthermore, for parts identical to those in Embodiment 1, the same reference numerals are used, and descriptions are omitted. For example... Figure 3 As shown, multiple oil drain ports 6A, 6B, 6C, and 6D are formed at the same position in the circumferential direction Z along the axial direction Y.

[0086] According to Embodiment 2 configured as described above, the oil accumulated in the bearing region T can be distributed and drained along the axial direction Y using the oil drain ports 6A, 6B, 6C, and 6D. Therefore, at the axial position Y, away from the center of the axial direction Y, the oil level will not drop, thus suppressing churning losses caused by contact between the oil and the outer peripheral surface of the rotating shaft 101. Furthermore, according to this structure, the oil level distribution can be adjusted by the formation position of the oil drain ports 6A to 6D along the axial direction Y.

[0087] The gap between the inner circumferential surface of the side plate 4 and the outer circumferential surface of the rotating shaft 101 (e.g., in the gap between the inner circumferential surface of the side plate 4 and the outer circumferential surface of the rotating shaft 101) Figure 3 When the amount of oil discharged from the part S (represented by the dashed line) is greater than the amount of oil discharged from the oil drain port 6, the oil level at both ends of the bearing region T along the axial direction Y tends to decrease easily, but the oil level at the center of the axial direction Y is difficult to decrease. In this case, if the oil drain ports 6B and 6C at the center of the axial direction Y are made larger than the oil drain ports 6A and 6D at the ends of the axial direction Y, or if more oil drain ports 6 are arranged near the center of the axial direction Y, the oil level distribution along the axial direction Y can be lowered more evenly. That is, according to this structure, the contact area between the outer circumferential surface of the rotating shaft 101 and the oil can be minimized, and stirring losses can be further reduced.

[0088] Since the oil flow in bearing region T is accompanied by the rotation of the rotating shaft 101 in the rotational direction H, the oil velocity in the axial direction Y is lower than the velocity in the rotational direction H. According to this embodiment, even if the oil does not flow in the axial direction Y, it can be efficiently discharged through the multiple oil drain ports 6A to 6D arranged in the axial direction Y. Therefore, the stirring loss generated during the oil flow in the axial direction Y can be reduced.

[0089] According to the journal bearing of Embodiment 2 constructed as described above, it can achieve the same effect as Embodiment 1. Furthermore, at least one of the oil drain ports is formed in multiple axial directions at the same circumferential position, thus enabling efficient oil drainage, thereby further suppressing unstable vibrations of each bearing and rotating shaft, and further reducing stirring losses.

[0090] Implementation Method 3

[0091] Figure 4 This is a cross-sectional view of the journal bearing 100 of Embodiment 3, perpendicular to the axial direction Y. Figure 5 yes Figure 4 The figure shows a sectional view of the journal bearing 100 along line BB. Additionally, the same reference numerals are used for parts that are the same as in the embodiments described above, and descriptions are omitted.

[0092] like Figure 4 and Figure 5 As shown, an oil drain port 68 is provided on the circumferential Z of the upstream bearing 21 and on the front side H1 of the upstream pivot 31 in the rotation direction H.

[0093] According to embodiment 3 constructed as described above, such as Figure 4 As shown, it can reduce the oil level height J2 between the upstream bearing 21 and the downstream bearing 22, and, as Figure 5 As shown, oil 900 located at both ends of the upstream bearing 21 along the axial Y direction, which does not contribute to the generation of oil film pressure, can be actively discharged through the oil drain port 68, thereby reducing the oil level height J2. That is, it can not only reduce the stirring loss generated between the upstream bearing 21 and the downstream bearing 22, but also reduce the stirring loss generated at both ends of the upstream bearing 21 along the axial Y direction.

[0094] According to the journal bearing of embodiment 3 constructed as described above, it can achieve the same effect as the above embodiments. Furthermore, at least one of the oil drain ports is arranged in the circumferential direction of the upstream bearing and in front of the rotation direction of the rotating shaft, which is closer to the upstream pivot than the upstream bearing. Therefore, the stirring loss generated at both ends of the axial direction of the upstream bearing can be reduced, thereby further suppressing the unstable vibration of each bearing and the rotating shaft, and further reducing the stirring loss.

[0095] Implementation Method 4

[0096] Figure 6 This is a cross-sectional view of the journal bearing 100 of Embodiment 4, perpendicular to the axial direction Y. Figure 7 yes Figure 6 The figure shows a cross-sectional view of the journal bearing 100 along the CC line. Additionally, the same reference numerals are used for parts that are the same as in the embodiments described above, and descriptions are omitted.

[0097] like Figure 6 and Figure 7 As shown, an oil drain port 69 is provided on the circumferential Z direction of the downstream bearing 22 and on the front side H1 of the downstream pivot 32 in the rotational direction H. Therefore, an oil drain path exists on the cross section of the axis Q of the rotating shaft 101, the downstream bearing 22, and the oil drain port 69. Figure 6 and Figure 7 The location of oil 900 is shown.

[0098] According to embodiment 4 constructed as described above, such as Figure 6 As shown, this can reduce the oil level height J2 between the upstream bearing 21 and the downstream bearing 22 (refer to...). Figure 4 ), and, as Figure 7 As shown, the oil 900 located at both ends of the downstream bearing 22 along the axial Y direction, which does not contribute to the generation of oil film pressure, can be actively discharged through the oil drain port 69, thereby reducing the oil level height J2. That is, it can not only reduce the stirring loss generated between the upstream bearing 21 and the downstream bearing 22, but also reduce the stirring loss generated at both ends of the downstream bearing 22 along the axial Y direction.

[0099] According to the journal bearing of embodiment 4 constructed as described above, it can achieve the same effect as the above embodiments. Furthermore, at least one of the oil drain ports is arranged in the circumferential direction of the downstream bearing bush and in front of the rotation direction of the rotating shaft, which is closer to the downstream pivot. Therefore, the stirring loss generated at both ends of the axial direction of the downstream bearing bush can be reduced, thereby further suppressing the unstable vibration of each bearing bush and the rotating shaft, and further reducing the stirring loss.

[0100] Implementation Method 5

[0101] Figure 8 This is a cross-sectional view of the journal bearing 100 of Embodiment 5, perpendicular to the axial direction Y. Furthermore, the same reference numerals are used for the parts that are the same as in the above embodiments, and descriptions are omitted.

[0102] like Figure 8 As shown, at least one of the oil drain ports 6, which is two oil drain ports 6 in this embodiment 5, and here oil drain ports 62 and 63, is equipped with an opening and closing part 75 and 76 for adjusting the oil discharge volume. Furthermore, Figure 8 The example shown is of an oil drain port 6 with opening and closing parts 75 and 76; examples of oil drain ports 6 in other locations are also possible. Multiple oil draining modes can be achieved by adjusting the opening and closing degree of the opening and closing parts 75 and 76. Furthermore, by fine-tuning the opening and closing parts 75 and 76, the oil draining volume can be adjusted from 100% to 0% relative to the maximum oil draining volume that can be discharged from a single oil drain port 6.

[0103] For example, the opening and closing parts 75 and 76 can be as follows: Figure 8 The opening and closing part shown is located on the outer periphery of the support ring 1, but it can also be located on the inner periphery of the support ring 1 or inside the support ring 1; its position is not limited. Furthermore, since this opening and closing part is the same as the opening and closing part in the following embodiments, its description will be appropriately omitted. Additionally, when referring to any one opening and closing part, it will be designated as opening and closing part 7.

[0104] According to Embodiment 5 configured as described above, for example, the opening and closing of the oil drain port 6 can be adjusted in accordance with the operating time of the rotating equipment 1000 to optimize the oil draining pattern. When the operating time of the rotating equipment 1000 increases, due to deterioration, the configuration and engagement state of each component undergo subtle changes, and sometimes the vibration of the rotating shaft 101 increases. When the vibration of the rotating shaft 101 increases, the size of the gap between the outer peripheral surface of the rotating shaft 101 and the inner peripheral surface of each bearing 21, 22 changes over time. Therefore, the height of the oil level adjusted at the initial operation decreases, and there is insufficient oil in the gap, which sometimes increases the unstable vibration of the rotating shaft 101 or each bearing 21, 22.

[0105] According to Embodiment 5, corresponding to the operating time of the rotating device 1000, the opening and closing of the oil drain port 6 is adjusted by the opening and closing parts 75 and 76 to optimize the oil level distribution at all times, thereby suppressing unstable vibrations of the bearings 21, 22 and the rotating shaft 101. For example, if the operating time of the rotating device 1000 becomes longer, by using the opening and closing part 7 to close a portion of the oil drain port 6 to raise the oil level, unstable vibrations of the bearings 21, 22 and the rotating shaft 101 caused by insufficient oil can be suppressed.

[0106] Furthermore, depending on the installation environment of the rotating equipment 1000, there may be cases where the temperature of the oil supplied from the oil supply nozzle 5 is higher than the specified temperature. This is generally considered in cases where the outside air temperature is very high, or where the cooling performance of the oil decreases due to deterioration of the cooling device. When the viscosity of the oil decreases due to the increase in oil temperature, the oil film pressure supporting the load of the rotating shaft 101 decreases, and the rotating shaft 101 sinks to the side G1 below the vertical direction G where the oil accumulates. Therefore, the oil level rises higher than usual, and with the rise in oil level, the stirring loss increases.

[0107] In contrast, according to Embodiment 5, corresponding to the installation environment of the rotating equipment 1000, the opening and closing of the oil drain port 6 is adjusted by the opening and closing part 7 to optimize the oil level distribution at all times, thereby suppressing unstable vibrations and minimizing stirring losses. For example, when the external air temperature of the rotating equipment 1000 is high, the oil level is lowered by opening a portion of the oil drain port 6, thereby reducing the normally higher stirring losses to a minimum.

[0108] According to the journal bearing of embodiment 5 constructed as described above, it can achieve the same effect as the above embodiments. Furthermore, at least one of the oil drain ports has an opening and closing part for adjusting the amount of oil discharged in the bearing area surrounded by the outer peripheral surface of the rotating shaft, the inner peripheral surface of the bearing ring, and the side plate. Therefore, by adjusting the opening and closing part, stirring loss can be reduced, thereby further suppressing the unstable vibration of each bearing and the rotating shaft, and further reducing stirring loss.

[0109] Implementation Method 6

[0110] Figure 9 This is a cross-sectional view of the journal bearing 100 of Embodiment 6, perpendicular to the axial direction Y. Furthermore, the same reference numerals are used for the parts that are the same as in the above embodiments, and descriptions are omitted.

[0111] like Figure 9 As shown, oil outlets 60, 62, 63, and 64 are equipped with opening and closing parts 71, 72, 73, and 74 respectively for adjusting the oil discharge volume. Furthermore, each unit includes: a sensor 81, disposed within a range of 0 to 180 degrees and from the vertical height L2 of the upstream pivot 31 to the highest vertical height L3 of the rotating shaft 101, for detecting the presence or absence of oil; and a control unit 9, which adjusts the opening and closing of at least one of the opening and closing parts 71, 72, 73, and 74 based on the measurement value of the sensor 81.

[0112] In addition, the oil drain port 60 is formed in the range of 0 degrees to 180 degrees and in the range from the vertical height L2 of the upstream pivot 31 to the position of the highest vertical height L3 of the rotating shaft 101.

[0113] Sensor 81 refers to a device that detects the presence or absence of oil. Examples include viscometers, pressure gauges, thermometers, infrared thermal imagers, electromagnetic radar meters, and ultrasonic thickness sensors. The detection is based on the difference in physical properties between oil and air. Additionally, the oil in bearing region T heats up due to the shear force caused by the rotation of the rotating shaft 101, making its temperature higher than that of air; this temperature difference can also be used for detection.

[0114] According to Embodiment 6 configured as described above, for example, when the presence of oil is detected by the sensor 81, the control unit 9 performs control to adjust the opening and closing of the opening and closing unit 71 or the opening and closing unit 74, increasing the discharge from the oil drain port 60 or the oil drain port 65. This maintains the oil level height J1 on the rear side H2 of the upstream bearing 21 in the direction of rotation H, or lowers the oil level height J3 on the front side H1 of the downstream bearing 22 in the direction of rotation H, reliably reducing churning losses, and filling the gap between the inner circumferential surface of the upstream bearing 21 and the outer circumferential surface of the rotating shaft 101 with oil, thereby suppressing unstable vibrations of the bearings 21, 22 and the rotating shaft 101 caused by insufficient oil.

[0115] According to the journal bearing of Embodiment 6 constructed as described above, it can achieve the same effect as the embodiments described above. Furthermore, since it is equipped with a sensor that detects the presence or absence of oil in the bearing area within a range of 0 to 180 degrees and from the vertical position of the upstream pivot to the highest vertical position of the rotating shaft, and a control unit that controls the opening and closing part based on the measured value of the sensor, the stirring loss can be further reduced by the control unit. Therefore, the unstable vibration of each bearing and the rotating shaft can be further suppressed, and the stirring loss can be further reduced.

[0116] Implementation Method 7

[0117] Figure 10 This is a cross-sectional view of the journal bearing 100 of Embodiment 7, perpendicular to the axial direction Y. Furthermore, the same reference numerals are used for the parts that are the same as in the above embodiments, and descriptions are omitted.

[0118] like Figure 10 As shown, a sensor 82 is provided for detecting the presence or absence of oil, located on a side H1 in front of the upstream pivot 31 in the rotational direction H of the rotation axis 101 and on a side H2 in rear of the downstream pivot 32 in the rotational direction H of the rotation axis 101. The control unit 9 adjusts the opening and closing of at least one of the opening and closing units 71, 72, 73, and 74 based on the measured value of the sensor 82.

[0119] According to Embodiment 7 configured as described above, for example, when the presence of oil is detected by the sensor 82, the control unit 9 adjusts the opening and closing of the opening and closing parts 72, 73, or 74 to increase the discharge from the oil drain port 62, 63, or 64. This reduces the oil level height J2 between the upstream bearing 21 and the downstream bearing 22, or the oil level height J3 on the front side H1 of the rotation direction H of the downstream bearing 22, thereby reliably reducing churning losses. Furthermore, the gap between the inner circumferential surface of the downstream bearing 22 and the outer circumferential surface of the rotating shaft 101 is filled with oil, thereby suppressing unstable vibrations of the bearings 21, 22, and the rotating shaft 101 caused by insufficient oil.

[0120] According to the journal bearing of Embodiment 7 constructed as described above, it can achieve the same effect as the embodiments described above. Furthermore, since it is equipped with a sensor that detects the presence or absence of oil in the bearing area, which is located in front of the rotating shaft in the rotation direction of the upstream pivot and behind the rotating shaft in the rotation direction of the downstream pivot, and a control unit that controls the opening and closing part based on the measured value of the sensor, the stirring loss can be further reduced by the control unit. Therefore, the unstable vibration of each bearing and the rotating shaft can be further suppressed, and the stirring loss can be further reduced.

[0121] Implementation Method 8

[0122] Figure 11 This is a cross-sectional view of the journal bearing 100 of Embodiment 8, perpendicular to the axial direction Y. Furthermore, the same reference numerals are used for the parts that are the same as in the above embodiments, and descriptions are omitted.

[0123] like Figure 11 As shown, a sensor 83 is provided that detects the presence or absence of oil, and is configured in a range of 180 degrees to 360 degrees, from the position of the vertical height L1 of the downstream pivot 32 to the position of the highest vertical height L3 of the rotation axis 101. The control unit 9 adjusts the opening and closing of at least one of the opening and closing units 71, 72, 73, and 74 based on the measured value of the sensor 83.

[0124] According to Embodiment 8 configured as described above, for example, when the sensor 83 detects the presence of oil, the control unit 9 adjusts the opening / closing unit 74 to increase the discharge rate from the oil drain port 65. This reduces the oil level J3 on the front side H1 of the downstream bearing 22 in the rotational direction H, reliably reducing agitation losses.

[0125] According to the journal bearing configured as described above in Embodiment 8, it can achieve the same effect as the embodiments described above. Furthermore, since it is equipped with a sensor that detects the presence or absence of oil in the bearing area within a range of 180 degrees to 360 degrees and from the vertical height position of the downstream pivot to the highest vertical height position of the rotating shaft, and a control unit that controls the opening and closing part based on the measured value of the sensor, the stirring loss can be further reduced by the control unit. Therefore, the unstable vibration of each bearing and the rotating shaft can be further suppressed, and the stirring loss can be further reduced.

[0126] Implementation Method 9

[0127] Figure 12 This is a cross-sectional view of the journal bearing 100 of Embodiment 9, perpendicular to the axial direction Y. Furthermore, the same reference numerals are used for the parts that are the same as in the above embodiments, and descriptions are omitted.

[0128] like Figure 12 As shown, a sensor 84 for detecting the presence or absence of oil is disposed near the outer peripheral surface of the rotating shaft 101. The sensor 84 is capable of detecting the presence or absence of oil at all circumferential Z positions as the rotating shaft 101 rotates. The control unit 9 adjusts the opening and closing of at least one of the opening and closing units 71, 72, 73, and 74 based on the measured value of the sensor 84.

[0129] According to the embodiment 9 configured as described above, for example, when the sensor 84 detects that the oil is present in a region where the oil level is lower than the gap between the outer peripheral surface of the rotating shaft 101 and the inner peripheral surface of each bearing 21, 22, the control unit 9 closes the oil drain port 6 near that region by using the opening and closing part, thereby causing the oil level near that region to rise only, thereby suppressing the unstable vibration of the rotating shaft 101 and each bearing 21, 22.

[0130] Conversely, in areas where the gap between the oil level and the inner circumferential surface of each bearing 21, 22 is too high relative to the outer circumferential surface of the rotating shaft 101 can be determined based on the detected oil level distribution, the control unit 9 opens the oil drain port 6 near that area using the opening and closing part, so that the oil level near that area is lowered, thereby reducing stirring loss.

[0131] Furthermore, by providing a sensor 84 near the outer peripheral surface of the rotating shaft 101, it is possible to detect whether oil adheres to the surface of the rotating shaft 101, thus enabling more accurate measurement of the oil surface distribution. Since oil tends to accumulate on the lower side G1 of the journal bearing 100, the oil-air interface, i.e., the oil surface, sometimes exhibits a complex distribution, for example, in areas with little air layer, such as between the upstream bearing 21 and the downstream bearing 22. However, according to this embodiment 9, the circumferential oil surface distribution can be detected with high precision.

[0132] For example, if the control unit 9 detects that oil cannot be detected near the upstream bearing 21 but can be detected near the downstream bearing 22 based on the measurement value of the sensor 84, it can determine that the oil supply to the gap between the downstream bearing 22 and the rotating shaft 101 can be sufficiently ensured. Therefore, by adjusting the opening and closing part 72 to open the oil drain port 62, the oil supply to the gap between the downstream bearing 22 and the rotating shaft 101 can be ensured, unstable vibration can be suppressed, and stirring loss can be reduced.

[0133] Conversely, if the controller 9 can detect oil near the upstream bearing 21 between the upstream bearing 21 and the downstream bearing 22 based on the measurement value of the sensor 84, but cannot detect oil near the downstream bearing 22, it can be determined that the oil supply to the gap between the downstream bearing 22 and the rotating shaft 101 is difficult to ensure. In this case, if the opening and closing part 72 is adjusted to open the oil drain port 62, not only can the oil level near the upstream bearing 21 where oil is detected be lowered, but also the oil level near the downstream bearing 22 where oil cannot be detected be lowered, thereby predicting the occurrence of unstable vibration.

[0134] Therefore, in this case, by adjusting the opening and closing part 71 or the opening and closing part 74 to open the oil drain port 60 or the oil drain port 65, the oil level is lowered only on the rear side H2 of the upstream bearing 21 in the direction of rotation H or on the front side H1 of the downstream bearing 22 in the direction of rotation H. This can suppress unstable vibrations and reduce stirring losses. The opening and closing part 71 adjusts the oil drain port 60, and the opening and closing part 74 adjusts the oil drain port 65. The oil drain port 60 or the oil drain port 65 is not located on the front side H1 of the upstream pivot 31 in the direction of rotation H or on the rear side H2 of the downstream pivot 32 in the direction of rotation H.

[0135] As described above, based on the detection value of the sensor 84 provided on the rotating shaft 101 and the oil level distribution of at least a portion, the control unit 9 adjusts each of the opening and closing parts 71 to 74, thereby suppressing the unstable vibration of the rotating shaft 101 and each bearing 21, 22, and reducing stirring losses.

[0136] According to the journal bearing of Embodiment 9 constructed as described above, it can achieve the same effect as the embodiments described above. Furthermore, when the rotating device is equipped with a sensor for detecting the presence or absence of oil on the outer peripheral surface of the rotating shaft, since a control unit is provided to control the opening and closing part based on the measured value of the sensor, the stirring loss can be further reduced by the control unit. Therefore, the unstable vibration of each bearing and the rotating shaft can be further suppressed, and the stirring loss can be further reduced.

[0137] Implementation Method 10

[0138] Figure 13 This is a cross-sectional view showing the structure of the rotating device 1000 of Embodiment 10 cut along the Y-axis. Furthermore, the same reference numerals are used for parts that are the same as in the above embodiments, and descriptions are omitted. (e.g.) Figure 13As shown, the rotating device 1000 includes a horizontally arranged rotating shaft 101, a pair of journal bearings 100 supporting both ends of the rotating shaft 101 for rotatability, and a stator 102 disposed on the outer periphery of the rotating shaft 101. At least one of the pair of journal bearings 100 is the journal bearing 100 involved in any of the above embodiments. Furthermore, the detailed structure of the journal bearing 100 is appropriately omitted in the figures.

[0139] Journal bearings 100 are respectively provided on the outer peripheral side of the ends of the rotating shaft 101. The journal bearings 100 support the rotating shaft 101. A rotor 111 with magnetic poles is provided on the rotating shaft 101. In this embodiment, as a rotating device 1000, a rotary electric machine is exemplified that generates electricity by inducing an alternating voltage in the stator 102.

[0140] According to this embodiment, bearing losses in the journal bearing 100 caused by energy relative to the rotating shaft 101 can be reduced, thereby improving the power generation efficiency of the rotary motor. Furthermore, by adjusting the oil discharge mode and appropriately controlling the oil level distribution, the amount of oil supplied to the journal bearing 100 can be reduced to the minimum required level, thus enabling the miniaturization of oil supply equipment such as the oil supply pump 103.

[0141] The rotating device according to Embodiment 10, as described above, can achieve the same effects as the embodiments described above. Furthermore, since it has journal bearings and a rotating shaft supported by the journal bearings, it can suppress unstable vibrations of the bearings and rotating shaft of the rotating device and reduce stirring losses.

[0142] Implementation Method 11

[0143] Figure 14 and Figure 15 This is a cross-sectional view showing the structure of the rotating device 1000 of Embodiment 11 cut along the Y-axis. Furthermore, the same reference numerals are used for parts that are the same as in the above embodiments, and descriptions are omitted. Additionally, the detailed structure of the journal bearing 100 is appropriately omitted in the figure. Therefore, the structures of the reference numerals not shown in the figure are the same as in the above embodiments.

[0144] exist Figure 14 In the rotating device 1000, a vibratory meter 10 is provided to detect the vibration or displacement of each bearing 21, 22. Additionally, in Figure 15 In this rotating device 1000, a vibration meter 10 is provided for detecting the vibration or displacement of the rotating shaft 101. Therefore, Figure 14 and Figure 15 The vibration meter 10 is installed in different locations. The control unit 9 adjusts at least one opening / closing part 7 according to the measured value of the vibration meter 10.

[0145] According to embodiment 11 configured as described above, when there is insufficient oil in the gap between the inner circumferential surface of each bearing bush 21, 22 and the outer circumferential surface of the rotating shaft 101, the oil film pressure on the rear side H2 of the gap in the rotation direction H decreases continuously or instantaneously. Due to the balance of torque centered on the upstream pivot 31, the upstream bearing bush 21 displaces or vibrates in a direction closer to the rotating shaft 101 on the rear side H2 of the upstream pivot 31 in the rotation direction H, and displaces or vibrates in a direction away from the rotating shaft 101 on the front side H1 of the upstream pivot 31 in the rotation direction H. At this time, the rotating shaft 101 displaces or vibrates in a direction closer to the upstream pivot 31.

[0146] Furthermore, when there is insufficient oil in the gap between the inner circumferential surface of the downstream bearing 22 and the outer circumferential surface of the rotating shaft 101, the oil film pressure on the rear side H2 of the gap in the rotation direction H decreases continuously or instantaneously. Due to the balance of the torque centered on the downstream pivot 32, the downstream bearing 22 displaces or vibrates in a direction closer to the rotating shaft 101 on the rear side H2 of the downstream pivot 32 in the rotation direction H, and displaces or vibrates in a direction away from the rotating shaft 101 on the front side H1 of the downstream pivot 32 in the rotation direction H. At this time, the rotating shaft 101 displaces or vibrates in a direction closer to the downstream pivot 32.

[0147] That is, by detecting the direction of displacement or vibration of each bearing 21, 22 and the direction of displacement or vibration of the rotating shaft 101, it can be determined in which gap there is insufficient oil and the oil film pressure is consistently or temporarily reduced. According to this embodiment 11, the location of insufficient oil in the gap can be determined by using the vibration meter 10 that detects the vibration or displacement of each bearing 21, 22 or the rotating shaft 101. By adjusting the opening and closing part 7 using the control part 9, the amount of oil discharged from the oil drain port 6 near the location of insufficient oil can be reduced, thereby raising the oil level, eliminating insufficient oil, and suppressing the unstable vibration of each bearing 21, 22 and the rotating shaft 101.

[0148] In addition, by installing the vibrator 10 for detecting the vibration or displacement of the upstream bearing 21 as far away from the upstream pivot 31 as possible, and installing the vibrator 10 for detecting the vibration or displacement of the downstream bearing 22 as far away from the downstream pivot 32 as possible, the amount of displacement and vibration detected increases. In the stage where a slight oil shortage occurs, the amount of oil discharged from the oil drain port 6 near the oil shortage area is reduced, causing the oil level to rise and eliminating the oil shortage. This further suppresses the unstable vibration of each bearing 21, 22 and the rotating shaft 101.

[0149] Furthermore, according to this embodiment, since the area where the oil is not insufficient can also be determined at the same time, by adjusting the opening and closing part 7 using the control part 9, the amount of oil discharged from the oil outlet 6 near the area where the oil is not insufficient can be increased, thereby lowering the oil level and reducing stirring loss.

[0150] According to the rotating device of Embodiment 10 configured as described above, it can achieve the same effects as the embodiments described above. Furthermore, the rotating device includes a journal bearing and a rotating shaft supported by the journal bearing. Since it includes a vibrator for detecting the vibration or displacement of the upstream bearing, the downstream bearing, or the rotating shaft, and a control unit for controlling the opening and closing part based on the measured value of the vibrator, it is possible to further suppress the unstable vibration of each bearing and the rotating shaft of the rotating device, and to further reduce stirring losses.

[0151] Furthermore, in the above embodiments, the number of oil supply nozzles 5 is shown as an example of 5, but the number of oil supply nozzles 5 can also be 0 to 4 or more. When there are 0 oil supply nozzles 5, the journal bearing 100 has other oil supply parts. Additionally, the arrangement positions of each bearing shell 21, 22 and each oil supply nozzle 5 are not limited to the arrangement positions shown in the figures. Furthermore, the arrangement position and shape of each oil drain port 6 are not limited to the arrangement position and shape shown in the figures.

[0152] Furthermore, the effect of suppressing unstable vibrations of the rotating shaft 101 and each bearing 21, 22 due to the function of each oil drain port 6, as well as the effect of reducing stirring losses, are independent of the shape of each bearing 21, 22 and the oil supply nozzle 5. Therefore, the shape of each bearing 21, 22 and the oil supply nozzle 5 is not limited to the shape shown in each figure.

[0153] Furthermore, the upstream bearing 21 and the downstream bearing 22 can have a single-layer structure formed from a single material, or a multi-layer structure formed from multiple materials. Various materials such as metals and resins can be used to form the upstream bearing 21 and the downstream bearing 22.

[0154] In addition, the number, location and shape of the oil drain port 6 are not limited to the number, location and shape shown in each figure.

[0155] Furthermore, the number and arrangement of the opening and closing parts 7 are not limited to those shown in the figures.

[0156] Furthermore, the number and location of the control units 9 are not limited to those shown in the figures.

[0157] Furthermore, the control unit 9 of the rotating equipment 1000 can adjust the opening and closing unit 7 in accordance with numerical data indicating the operating state of the rotating equipment 1000, thereby optimizing the oil drainage mode. On the rear side H2 of the upstream bearing 21 in the rotation direction H, air accumulated on the upper side G2 of the bearing region T flows towards the front side H1 in the rotation direction H due to the shear force generated by the rotation of the rotating shaft 101. Therefore, the oil level tends to drop on the rear side H2 of the upstream bearing 21 in the rotation direction H, but the amount of drop varies depending on the rotational speed. At low rotational speeds, the shear force generated by the rotation of the rotating shaft 101 is small, resulting in a small drop in the oil level on the rear side H2 of the upstream bearing 21 in the rotation direction H. At high rotational speeds, the shear force generated by the rotation of the rotating shaft 101 is large, resulting in a large drop in the oil level on the rear side H2 of the upstream bearing 21 in the rotation direction H.

[0158] For example, at low speeds, the control unit 9 adjusts the opening / closing unit 7 to open the oil drain port 6 near the upstream bearing 21. At high speeds, the control unit 9 adjusts the opening / closing unit 7 to close the oil drain port 6 near the upstream bearing 21. Thus, regardless of the speed, a certain oil level can always be maintained. Therefore, the increased unstable vibration of each bearing 21, 22 and the rotating shaft 101 due to the speed, as well as the increased contact area between the rotating shaft 101 and the oil, which leads to increased churning losses, can be continuously suppressed, and churning losses can be minimized to the greatest extent possible.

[0159] Furthermore, by using sensors or vibrometers to monitor the oil level distribution, in areas where the oil level is determined to be lower than the gap between the outer circumferential surface of the rotating shaft 101 and the inner circumferential surface of each bearing 21, 22, the controller 9 adjusts the opening / closing part 7 to close the nearby oil drain port 6. This causes only the nearby oil level to rise, suppressing unstable vibrations of the rotating shaft 101 and each bearing 21, 22. Conversely, in areas where the oil level is determined to be excessively high relative to the gap between the outer circumferential surface of the rotating shaft 101 and the inner circumferential surface of each bearing 21, 22, the control unit 9 adjusts the opening / closing part 7 to open the nearby oil drain port 6. This causes only the nearby oil level to drop, reducing agitation losses.

[0160] Additionally, in the rotating device 1000, Figures 13-15 The number of journal bearings 100 shown is two, but the number of journal bearings can also be one or more. Furthermore, the arrangement of the journal bearings 100 is not limited to... Figures 13-15 The configuration location is shown.

[0161] In addition, the journal bearing 100 also includes a state in which oil is not supplied to the bearing area T of the journal bearing 100.

[0162] In addition, such as Figure 15As shown, the control unit 9 is an example of hardware consisting of a processor 200 and a storage device 201. The storage device is not shown, but it includes volatile storage devices such as random access memory and non-volatile auxiliary storage devices such as flash memory. Alternatively, a hard disk can be used as an auxiliary storage device instead of flash memory. The processor 200 executes a program input from the storage device 201. In this case, the program is input to the processor 200 from the auxiliary storage device via the volatile storage device. Furthermore, the processor 200 can output data such as calculation results to the volatile storage device of the storage device 201, or save data to the auxiliary storage device via the volatile storage device.

[0163] Although this application describes various exemplary embodiments and examples, the various features, methods and functions described in one or more embodiments are not limited to the application of a particular embodiment and can be applied to the embodiment alone or in various combinations.

[0164] Therefore, within the scope of the technology disclosed in this application, numerous variations not illustrated are contemplated. These include variations, additions, or omissions of at least one constituent element, as well as extraction of at least one constituent element and combination with constituent elements of other embodiments.

[0165] Explanation of reference numerals in the attached figures

[0166] 1. Bearing ring, 10. Vibration meter, 100. Journal bearing, 101. Rotating shaft, 111. Rotor, 102. Stator, 103. Oil pump, 1000. Rotating equipment, 11. Lower half, 12. Upper half, 13. Guide metal parts, 200. Processor, 201. Storage device, 21. Upstream bearing, 22. Downstream bearing, 31. Upstream pivot, 32. Downstream pivot, 4. Side plate, 5. Oil supply nozzle, 6. Oil drain port, 60. Oil drain port, 61. Oil drain port, 62. Oil drain port, 63. Oil drain port, 64. Oil drain port, 65. Oil drain port, 66. Oil drain port, 67. Oil drain port, 68. Oil drain port, 69. Oil drain port, 7. Opening and closing part, 7. 1. Opening / closing part, 72. Opening / closing part, 73. Opening / closing part, 74. Opening / closing part, 75. Opening / closing part, 81. Sensor, 82. Sensor, 83. Sensor, 84. Sensor, 9. Control unit, G. Vertical direction, G1 lower side, G2 upper side, H. Rotation direction, H1 front side, H2 rear side, Q. Shaft center, S. Part, J1 oil level, J2 oil level, J3 oil level, L1 vertical height, L2 vertical height, L3 vertical height, Y-axis, Z. Circumferential direction, Z1 circumferential position, Z10 arrow, Z11 upper end, Z12 lower end, Z2 circumferential position, Z20 arrow, Z3 circumferential position.

Claims

1. A journal bearing for supporting the rotating shaft of a rotating device, wherein, The journal bearing comprises: The bearing ring is arranged at intervals on the outer periphery of the rotating shaft and has a plurality of oil drain ports extending from the inner periphery to the outer periphery in the circumferential direction. The upstream and downstream bearings are arranged with the lower half of the bearing ring located on the load direction side of the rotating shaft as the lower half. The upstream and downstream bearings are arranged at different circumferential positions between the inner circumferential surface of the lower half of the bearing ring and the outer circumferential surface of the rotating shaft. The upstream bearing is located on the rear side of the rotating shaft in the rotation direction, and the downstream bearing is located on the front side of the rotating shaft in the rotation direction. An upstream pivot allows the upstream bearing to be pivotally supported on the inner circumferential surface of the bearing ring; The downstream pivot allows the downstream bearing to be pivotally supported on the inner circumferential surface of the bearing ring; The opening and closing mechanism adjusts the oil discharge rate of at least one of the oil outlets. as well as The control unit controls the opening and closing unit based on the measurement values ​​of a sensor that detects the presence or absence of oil on the outer circumferential surface of the rotating shaft. The bearing ring has multiple oil drain ports extending from the inner circumferential surface to the outer circumferential surface in the circumferential direction. In a section perpendicular to the axial direction of the journal bearing, if the upper end in the load direction of the rotational direction is set to 0 degrees, the lower end to 180 degrees, and further, the upper end to 360 degrees, The oil drain port is disposed in at least two of the following ranges of the bearing ring: a range from 180 degrees to 360 degrees, extending from the vertical height of the downstream pivot to the highest vertical height of the rotating shaft; and a range from 0 degrees to 180 degrees, extending from the vertical height of the upstream pivot to the highest vertical height of the rotating shaft. At least one of the oil drain ports located within the range has the opening and closing portion.

2. The journal bearing according to claim 1, wherein, The sensor detects the presence or absence of oil in a range of 0 to 180 degrees within the bearing region surrounded by the outer circumferential surface of the rotating shaft, the inner circumferential surface of the bearing ring, and the side plates that surround the axial ends of the upstream and downstream bearings, respectively, and from the vertical position of the upstream pivot to the highest vertical position in the rotating shaft.

3. The journal bearing according to claim 1, wherein, The sensor detects the presence or absence of oil in the bearing region surrounded by the outer peripheral surface of the rotating shaft, the inner peripheral surface of the bearing ring, and the side plates that respectively surround the axial ends of the upstream and downstream bearing bushes. The oil is located in front of the upstream pivot in the direction of rotation of the rotating shaft and behind the downstream pivot in the direction of rotation of the rotating shaft.

4. The journal bearing according to claim 1, wherein, The sensor detects the presence or absence of oil within a range of 180 to 360 degrees in the bearing region surrounded by the outer circumferential surface of the rotating shaft, the inner circumferential surface of the bearing ring, and the side plates that surround the axial ends of the upstream and downstream bearings, respectively, and from the vertical position of the downstream pivot to the highest vertical position in the rotating shaft.

5. The journal bearing according to any one of claims 1 to 4, wherein, The sensor is located on the outer periphery of the rotating shaft.

6. The journal bearing according to any one of claims 1 to 5, wherein, At least one of the oil drain ports has multiple ports formed axially at the same circumferential position.

7. The journal bearing according to any one of claims 1 to 6, wherein, At least one of the oil drain ports is disposed in the circumferential region of the upstream bearing and is located in front of the rotation direction of the rotating axis compared to the upstream pivot.

8. The journal bearing according to any one of claims 1 to 6, wherein, At least one of the oil drain ports is disposed in the circumferential region where the downstream bearing is disposed and is located in front of the rotation direction of the rotating axis compared to the downstream pivot.

9. A rotating device, wherein, The rotating device includes: The journal bearing according to any one of claims 1 to 8; and The rotating shaft is supported by the journal bearing.

10. The rotating device according to claim 9, wherein, The rotating device includes: A vibration meter detects the vibration or displacement of the upstream bearing, the downstream bearing, or the rotating shaft; and The control unit controls the opening and closing unit based on the measured values ​​of the vibration meter.

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