An asymmetric oil supply plain bearing

Abstract

The utility model discloses an asymmetric oil supply sliding bearing, including bearing, pivot, pivot inserts the bearing, and the bearing includes first bearing body, second bearing body, and the second bearing body is equipped with first oil inlet, second oil inlet, and the cavity is formed between bearing and pivot, and the cavity includes first area, second area, and first area, second area are located at the left and right sides of pivot respectively, and first oil inlet communicates with second area, and second oil inlet communicates with first area, and the inner wall of first bearing body is equipped with groove no.

Description

Technical Field

[0001] This utility model relates to the field of sliding bearing equipment technology, and more specifically, to an asymmetric oil-supply sliding bearing. Background Technology

[0002] like Figure 1 As shown, in a current type of sliding bearing structure, the bearing shell 100 is provided with an oil inlet hole 101 of fixed diameter according to the host machine standard. The oil inlet hole 101 is used to supply oil to the rotor 200 so that an oil film layer is formed between the rotor 200 and the bearing shell 100. Since the oil inlet hole 101 is set on one side, the position where the oil in the oil inlet hole 101 enters between the rotor 200 and the bearing shell 100 is the low-pressure end of the oil film. The high-pressure end of the oil film far from this position is prone to oil leakage, resulting in unstable oil film pressure, which can easily cause oil film oscillation or vortex. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an asymmetric oil supply sliding bearing to reduce oil film oscillation or whirl.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: an asymmetric oil-supply sliding bearing, comprising a bearing bush and a rotating shaft, wherein the rotating shaft is inserted into the bearing bush, the bearing bush comprising a first bearing bush body and a second bearing bush body, the second bearing bush body being provided with a first oil inlet and a second oil inlet, a cavity being formed between the bearing bush and the rotating shaft, the cavity comprising a first region and a second region, the first region and the second region being located on the left and right sides of the rotating shaft respectively, the first oil inlet communicating with the second region, the second oil inlet communicating with the first region, and a groove being provided on the inner wall of the first bearing bush body.

[0005] The present invention is further configured such that the first bearing body is located above the second bearing body.

[0006] The present invention is further configured such that a second groove is provided at the upper end of the second bearing body, the second groove is located on the left and right sides of the second bearing body, the two second grooves are respectively connected to the first region and the second region, one of the second grooves is connected to the first oil inlet, and the other second groove is connected to the second oil inlet.

[0007] The present invention is further configured such that the diameter of the first oil inlet is smaller than the diameter of the second oil inlet.

[0008] The present invention is further configured to include a bearing housing, which is movably connected to the bearing bush. The bearing housing has a groove, and the outer wall of the bearing bush has a protrusion that is inserted into the groove. The outer wall surface of the protrusion and the inner wall surface of the groove are matching spherical surfaces.

[0009] The present invention is further configured such that a pin is installed on the bearing bush, one end of the pin is inserted into the bearing bush, and the other end of the pin is inserted into the bearing seat.

[0010] The present invention is further configured such that the bearing bush has a third hole, and the third hole and the pin are in transition fit.

[0011] The present invention is further configured such that the bearing housing has a channel, and the channel and the pin are in clearance fit.

[0012] The present invention is further configured such that the bearing housing has a second channel, which is an oil inlet, and the second channel is connected to both the first oil inlet and the second oil inlet.

[0013] In summary, this utility model has the following beneficial effects:

[0014] Oil is introduced through a small-diameter inlet at the first inlet, resulting in higher inlet pressure. This first inlet provides high-pressure support to the second region, preventing rapid oil leakage in this critical high-pressure area. This more stably maintains the oil film pressure in the core region, significantly improving local load-bearing capacity and suppressing oil film eddy and oscillation. Simultaneously, by setting up a tank, the oil flow cross-section changes to disrupt the oil film continuity, and the increased oil flow contact surface enhances damping, thereby suppressing oil film eddy and oscillation and strengthening self-stability. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the background technology;

[0016] Figure 2 This is a cross-sectional view of an embodiment;

[0017] Figure 3 This is a cross-sectional view of the first bearing body in the embodiment;

[0018] Figure 4 for Figure 3 Assembly drawing of the first bearing shell in the MM section direction with the bearing housing;

[0019] Figure 5 This is a cross-sectional view of the bearing housing and bearing bush in the embodiment.

[0020] Reference numerals in the attached drawings: bearing housing 1, hole one 11, hole two 12, groove 13, bearing shell 2, first bearing shell body 21, hole three 211, groove one 212, second bearing shell body 22, first oil inlet 221, second oil inlet 222, groove two 223, protrusion 23, pin 3, rotating shaft 4, cavity 5, first area 51, second area 52, bearing shell 100, oil inlet hole 101, rotor 200. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figures 2-5 As shown, this embodiment discloses an asymmetric oil-supply sliding bearing, including a bearing housing 1, which is formed by splicing and fixing two semi-circular seat bodies. A bearing bush 2 is movably connected and installed on the inner side of the bearing housing 1. Specifically, as shown... Figure 2 , Figure 4 As shown, the inner wall of the bearing housing 1 is provided with a groove 13, and the outer wall of the bearing bush 2 is provided with a protrusion 23. The protrusion 23 is inserted into the groove 13. The outer wall surface of the protrusion 23 and the inner wall surface of the groove 13 are matching spherical surfaces. The protrusion 23 can rotate along the inner wall surface of the groove 13 to adjust the center position of the bearing bush 2 and reduce the positional deviation between the axis of the bearing bush 2 and the axis of the rotating shaft 4.

[0023] like Figure 5 As shown, the rotating shaft 4 is inserted into the bearing bush 2. Figure 2 , Figure 4 As shown, the bearing bush 2 is fitted with a pin 3, one end of which is inserted into the bearing bush 2, and the other end of which is inserted into the bearing housing 1. Specifically, the bearing bush 2 has a channel 3 211, and one end of the pin 3 is inserted into the channel 3 211. The channel 3 211 and the pin 3 have an intermediate fit to prevent excessive tightness and facilitate disassembly and assembly. The bearing housing 1 has a channel 11, and one end of the pin 3 is inserted into the channel 11. The channel 11 and the pin 3 have a clearance fit to provide micro-angle rotation adjustment of the bearing bush 2 for easy self-alignment.

[0024] The bearing 2 includes a first bearing body 21 and a second bearing body 22. The first bearing body 21 and the second bearing body 22 are both semi-circular structures with the same radius and are spliced ​​together to form a cylindrical bearing 2. The first bearing body 21 is located above the second bearing body 22.

[0025] like Figure 2 As shown, the bearing housing 1 is provided with a second channel 12, which is located below the second bearing body 22. The second channel 12 is an oil inlet. The second bearing body 22 is provided with a first oil inlet 221 and a second oil inlet 222. The second channel 12 is connected to the first oil inlet 221 and the second oil inlet 222. The first oil inlet 221 and the second oil inlet 222 are located on the left and right sides of the second bearing body 22, respectively.

[0026] like Figure 2As shown, the upper end of the second bearing body 22 is provided with a groove 223. The groove 223 is located on the left and right sides of the second bearing body 22. The two grooves 223 are respectively connected to the first oil inlet 221 and the second oil inlet 222.

[0027] like Figure 5 As shown, due to the gap between the bearing bush 2 and the shaft 4, the shaft 4 forms a gap under the action of gravity. Figure 5 The position status shown. Figure 5 For easier observation, the gap between the bearing 2 and the rotating shaft 4 is magnified. A cavity 5 is formed between the bearing 2 and the rotating shaft 4. The cavity 5 includes a first region 51 and a second region 52, which are located on the left and right sides of the rotating shaft 4, respectively. Figure 2 , Figure 5 The first oil inlet 221 is connected to the second region 52 through the second tank 223, and the second oil inlet 222 is connected to the first region 51 through the second tank 223.

[0028] like Figure 3 , Figure 4 As shown, the inner wall of the first bearing body 21 is provided with a groove 212. The groove 212 extends radially outward along the inner wall of the first bearing body 21, and the two ends of the groove 212 in the length direction pass through the two ends of the arc of the first bearing body 21.

[0029] The diameter of the first oil inlet 221 is smaller than the diameter of the second oil inlet 222, such as Figure 5 As shown, the shaft 4 rotates clockwise. The first region 51 is the low-pressure end of the oil film, reducing oil inlet resistance and facilitating the introduction of sufficient oil through the second oil inlet 222 to ensure lubrication. After being squeezed at the bottom of the shaft 4, the oil flows to the second region 52, where it forms a high-pressure end. Oil enters through the small diameter of the first oil inlet 221, resulting in higher inlet pressure. The first oil inlet 221 provides high-pressure support to the second region 52, preventing excessive oil leakage in this critical high-pressure area. This more stably maintains the oil film pressure in the core area, greatly improving the local load-bearing capacity.

[0030] Specifically, the second oil inlet 222 is located in a relatively low-pressure area. As the main oil supply channel, it ensures a sufficient influx of fresh lubricating oil. Simultaneously, it helps guide the oil flow direction and adjust the shape of the pressure field, resulting in a smoother pressure distribution and avoiding extreme pressure peaks. This improves the stress condition of the bearing bush, reduces wear and fatigue, and serves both as an oil supply and drainage mechanism. The asymmetric oil inlet structure enhances the efficiency of lubricating oil displacement and cooling. By actively intervening in the formation of oil film pressure through two oil inlets of different sizes, it can alter the stiffness and damping characteristics of the oil film, suppressing potential oil film whirl or oscillation in the rotor system and improving the stability of rotor operation.

[0031] Because the diameters of the first oil inlet 221 and the second oil inlet 222 are different, an asymmetrical oil inlet structure is created, which can cause oil film oscillation or vortex. Therefore, a tank body 212 is set up to change the oil flow cross section to disrupt the continuity of the oil film and increase the oil flow contact surface to increase damping, thereby suppressing oil film vortex and oil film oscillation and enhancing self-stability.

[0032] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. An asymmetric oil-supply sliding bearing, characterized in that, The assembly includes a bearing (2) and a rotating shaft (4). The rotating shaft (4) is inserted into the bearing (2). The bearing (2) includes a first bearing body (21) and a second bearing body (22). The second bearing body (22) is provided with a first oil inlet (221) and a second oil inlet (222). A cavity (5) is formed between the bearing (2) and the rotating shaft (4). The cavity (5) includes a first region (51) and a second region (52). The first region (51) and the second region (52) are located on the left and right sides of the rotating shaft (4), respectively. The first oil inlet (221) is connected to the second region (52), and the second oil inlet (222) is connected to the first region (51). The inner wall of the first bearing body (21) is provided with a groove (212).

2. The asymmetric oil-supply sliding bearing according to claim 1, characterized in that, The first bearing body (21) is located above the second bearing body (22).

3. The asymmetric oil-supply sliding bearing according to claim 1, characterized in that, The second bearing body (22) is provided with a groove (223) at the upper end. The groove (223) is located on the left and right sides of the second bearing body (22). The two grooves (223) are respectively connected to the first region (51) and the second region (52). One of the grooves (223) is connected to the first oil inlet (221), and the other groove (223) is connected to the second oil inlet (222).

4. An asymmetric oil-supply sliding bearing according to claim 1, characterized in that, The diameter of the first oil inlet (221) is smaller than the diameter of the second oil inlet (222).

5. An asymmetric oil-supply sliding bearing according to claim 1, characterized in that, It also includes a bearing housing (1), which is movably connected to the bearing bush (2). The bearing housing (1) is provided with a groove (13), and the outer wall of the bearing bush (2) is provided with a protrusion (23). The protrusion (23) is inserted into the groove (13), and the outer wall surface of the protrusion (23) and the inner wall surface of the groove (13) are matching spherical surfaces.

6. An asymmetric oil-supply sliding bearing according to claim 5, characterized in that, The bearing bush (2) is fitted with a pin (3), one end of which is inserted into the bearing bush (2), and the other end of which is inserted into the bearing seat (1).

7. An asymmetric oil-supply sliding bearing according to claim 6, characterized in that, The bearing bush (2) is provided with a third hole (211), and the third hole (211) and the pin (3) are in transition fit.

8. An asymmetric oil-supply sliding bearing according to claim 6, characterized in that, The bearing housing (1) is provided with a channel (11), and the channel (11) and the pin (3) are in clearance fit.

9. An asymmetric oil-supply sliding bearing according to claim 5, characterized in that, The bearing housing (1) is provided with a second channel (12), which is an oil inlet. The second channel (12) is connected to both the first oil inlet (221) and the second oil inlet (222).

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