A copper alloy sliding bearing with high stability

Abstract

The present invention relates to the technical field of bearings. The purpose is to provide a highly stable copper alloy sliding bearing, which includes a bearing seat, a bearing bush installed in the bearing seat, and a shaft support mechanism fixedly installed on a rotating shaft; the rotating shaft can pass through the bearing bush through the shaft support mechanism and form a rotational fit with the bearing bush; the shaft support mechanism includes a support sleeve, and multiple annular support grooves are provided on the outer side wall of the support sleeve, and multiple annular tile rings are provided on the inner side wall of the bearing bush corresponding to the number of the support grooves. The tile rings of the bearing bush extend into the support grooves of the support sleeve and form a sliding fit with the support sleeve; a clearance fit is formed between the bearing bush and the support sleeve, and the clearance between the two forms a lubricating cavity for the flow of lubricating oil. The present invention changes the traditional independent planar sliding support to a sliding support of multiple toroidal surfaces, improving the overall stability and the risk of anti-deformation.

Description

Technical Field

[0001] The invention relates to the technical field of bearings, and in particular to a high-stability copper alloy sliding bearing. Background Art

[0002] Sliding bearings refer to bearings that work under sliding friction. They usually include a bearing seat and a bushing installed in the bearing seat. When in use, the journal of the rotating shaft is installed in the bushing and slides with the surface of the bushing through lubricating oil, grease, etc., to support the rotating shaft. Sometimes, in order to improve friction, a friction-reducing bearing lining can be cast on the inner surface of the bushing. Copper-based alloys are a major preparation material for bushings and bearing linings. Copper alloy sliding bearings made of them are generally referred to as copper alloy sliding bearings. Sliding bearings have the characteristics of stable, reliable operation and low noise, and are widely used in low-speed and heavy-load shaft support situations.

[0003] Since the sliding bearing uses the inner surface of the bearing as the sliding surface during use, and the sliding friction will generate a lot of heat, this will cause the temperature of the bearing close to the journal to be much higher than the temperature of the bearing away from the journal. The bearing will be easily deformed when it is supported in this temperature imbalance state for a long time, which will cause the bearing to be dislocated, and then fall into a vicious cycle of increased wear and increased deformation. Therefore, how to balance the temperature of each part during the bearing support process and reduce the risk of bearing deformation is a common problem in this field. The most common practice in the prior art is to open an oil groove on the inner surface of the bearing, and force the inner surface of the bearing to dissipate heat through the flow of lubricating oil and grease, and the heat is guided out along the axial direction of the bearing through the lubricating oil and grease. Although this practice improves the high temperature of the inner surface of the bearing to a certain extent, it cannot fundamentally solve the temperature difference problem between the part of the bearing close to the rotating shaft and the part of the bearing away from the rotating shaft. There are also ways in the prior art to improve the heat dissipation of the bearing and the bearing liner themselves and improve the anti-deformation strength by improving the material properties of the bearing and the bearing liner, but this method requires huge R&D investment and creates huge economic pressure on enterprises. Therefore, how to solve the thermal balance problem of the bearing in a simple and efficient way is a technical problem that needs to be solved urgently in this field. Summary of the invention

[0004] The object of the present invention is to provide a deep groove type high stability copper alloy sliding bearing which can effectively form thermal balance.

[0005] To achieve the above-mentioned invention object, the technical solution adopted by the present invention is: a high-stability copper alloy sliding bearing, comprising a bearing seat, a bearing bush installed in the bearing seat, and a shaft support mechanism fixedly installed on a rotating shaft; the rotating shaft can be passed through the bearing bush through the shaft support mechanism and form a rotational fit with the bearing bush;

[0006] The shaft support mechanism includes a support sleeve, and multiple annular support grooves are provided on the outer side wall of the support sleeve. On the inner side wall of the bearing bush, multiple annular bush rings are provided corresponding to the number of the support grooves. The bush rings of the bearing bush extend into the support grooves of the support sleeve and form a sliding fit with the support sleeve; the gap between the bearing bush and the support sleeve forms a lubrication channel for the lubricating oil to flow.

[0007] Preferably, multiple inner-section strengthening holes extending radially along the bush ring are provided inside each bush ring. The inner-section strengthening holes extend to the outer surface of the bearing bush. Outer-section strengthening holes are provided at the positions on the bearing seat corresponding to the inner-section strengthening holes. Strengthening core rods are inserted into the inner-section strengthening holes and the outer-section strengthening holes.

[0008] Preferably, a ring platform protruding inwards is provided on the inner surface of the middle section of the bearing seat. A positioning groove matching with the ring platform is provided on the outer side wall of the bearing bush. The bearing bush is clamped outside the ring platform through the positioning groove; lubricating oil boxes are formed between the two end faces of the bearing seat and the ring platform, the bearing bush and the support sleeve; sealing end covers adapted to each other are provided between the two end faces of the bearing seat and the rotating shaft.

[0009] Preferably, multiple forced flow holes are provided on the groove walls on the outer sides corresponding to the support grooves at both ends of the support sleeve. One end of each forced flow hole is communicated with the lubricating oil cavity in the bearing seat, and the other end is communicated with the lubrication channel; the forced flow holes penetrate through the groove wall obliquely, and multiple forced flow holes are evenly distributed in a ring around the center of the support sleeve;

[0010] Communication holes are further provided on the side walls at both ends of the bearing seat. The inner ends of the communication holes are communicated with the lubricating oil boxes at both ends of the bearing seat, and the outer ends of the two communication holes are communicated through a communication pipe.

[0011] Preferably, oil channel sealing rings are provided between the two ends of the bearing bush and the support sleeve.

[0012] Preferably, an annular clamping groove is provided on the side wall of the rotating shaft. The support sleeve is clamped in the clamping groove and locked with the rotating shaft through a shaft bolt.

[0013] Preferably, at least three support grooves are provided on the support sleeve.

[0014] Preferably, the bearing seat, the bearing bush and the support sleeve are all composed of upper and lower halves.

[0015] Preferably, splicing edges are provided at the opposite edges of the ends of the upper and lower halves of the support sleeve, and the splicing edges are locked through sleeve bolts.

[0016] Preferably, both the support sleeve and the bearing bush are made of copper alloy.

[0017] The beneficial effects of the present invention are mainly reflected in that the traditional independent planar sliding support is changed to a sliding support with multiple toroidal surfaces, which improves the overall stability and the risk of anti-deformation. Specifically, in the application process of the present invention, the traditional cylindrical bearing bush design is abandoned, and multiple bearing bush rings are arranged inside the bearing bush, and multiple support grooves matching the bearing bush rings are arranged on the side wall of the support sleeve. In this form, multiple toroidal surface support structures can be formed between the inner toroidal surface of the bearing bush ring and the bottom surface of the support groove, and between the inner surface of the main body of the bearing bush and the circumferential surface of the support sleeve on both sides of the support groove. During the relative rotation of the bearing bush and the support sleeve, the heat generated by sliding friction can be more evenly distributed on the entire bearing bush and support sleeve, avoiding excessive temperature differences between the near-axis side and the far-axis side of the bearing bush, and greatly reducing the risk of thermal deformation of the bearing bush and the support sleeve. At the same time, the bearing bush rings on the bearing bush can also limit the axial position of the support sleeve to a certain extent, improving the axial stability of the rotating shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic installation structure diagram of the present invention and the rotating shaft;

[0019] Figure 2 is Figure 1 the left view of the support sleeve in;

[0020] Figure 3 is a schematic three-dimensional structure diagram of the support sleeve;

[0021] Figure 4 is Figure 1 the left view of the bearing bush in;

[0022] Figure 5 is a schematic three-dimensional structure diagram of the bearing bush;

[0023] Figure 6 is a schematic structure diagram of the bearing seat;

[0024] Figure 7 is Figure 6 the left view of the bearing seat in. DETAILED DESCRIPTION OF THE INVENTION

[0025] As Figures 1-7As shown, a highly stable copper alloy sliding bearing is used to support the rotating shaft 3 to ensure the stability of the rotating shaft 3 during rotation, alleviate the thermal deformation problem of traditional sliding bearings during long-term use, ensure the stability of support, and improve the mechanical life. The similarities between the present invention and traditional sliding bearings are that both include a bearing housing 1 and a bearing bush 2 installed in the bearing housing 1. However, one of the major differences is that the present invention further includes a shaft support mechanism fixedly installed on the rotating shaft 3. The rotating shaft 3 can pass through the bearing bush 2 through the shaft support mechanism and form a rotational fit with the bearing bush 2. In other words, in the application of the present invention, the rotating shaft 3 of the device does not directly contact the bearing bush 2, but is connected to the bearing bush 2 through the transfer of the shaft support mechanism. In this way, during the operation of the mechanical device, the rotating shaft 3 will not directly wear against the bearing bush 2. Even if wear occurs, when maintenance is required, only the corresponding shaft support mechanism needs to be replaced, without the need to replace the rotating shaft 3, greatly reducing the subsequent maintenance cost of the device.

[0026] Combined with Figures 1-3 As shown in the figure, the shaft support mechanism of the present invention includes a support sleeve 4, and the support sleeve 4 is fixedly connected to the rotating shaft 3. To ensure the tightness of the connection between the two, an annular clamping groove 19 is provided on the side wall of the rotating shaft 3, and the support sleeve 4 is clamped in the clamping groove 19 and locked with the rotating shaft 3 through a shaft bolt 20. A plurality of annular support groove grooves 5 are provided on the outer side wall of the support sleeve 4. Generally, at least three support groove grooves 5 are provided on the support sleeve 4. Of course, according to the model size of the rotating shaft 3, the number of support groove grooves 5 can be appropriately increased, but usually not less than three. After the support groove grooves 5 are provided, the outer peripheral surface of the support sleeve 4 and the bottom surface of the support groove grooves 5 both form sliding surfaces in contact with the bearing bush 6. Correspondingly, combined with Figure 1 and 5 As shown in the figure, a plurality of annular tile rings 6 are provided on the inner side wall of the bearing bush 2 corresponding to the number of support groove grooves 5. As shown in the figure, when three support groove grooves 5 are provided, three tile rings 6 are provided. The tile rings 6 of the bearing bush 2 extend into the support groove grooves 5 of the support sleeve 4 and form a sliding fit with the support sleeve 4. The gap between the bearing bush 2 and the support sleeve 4 forms a lubricating channel 7 for the lubricating oil to flow.

[0027] In the application process of the present invention, the traditional cylindrical bearing bush design is abandoned. Instead, multiple bearing bush rings 6 are arranged inside the bearing bush 2, and multiple supporting groove channels 5 matching the bearing bush rings 6 are arranged on the side wall of the supporting sleeve 4. In this form, multiple ring surface supporting structures can be formed between the inner ring surface of the bearing bush ring 6 and the bottom surface of the supporting groove channel 5, and between the main inner surface of the bearing bush 2 and the circumferential surface of the supporting sleeve 4 on both sides of the supporting groove channel 5. During the relative rotation of the bearing bush 2 and the supporting sleeve 4, the heat generated by sliding friction can be more evenly distributed on the entire bearing bush 2 and the supporting sleeve 4, avoiding excessive temperature differences between the near-axis side and the far-axis side of the bearing bush 2, and greatly reducing the risk of thermal deformation of the bearing bush 2 and the supporting sleeve 4. At the same time, the bearing bush rings on the bearing bush 2 can also limit the axial position of the supporting sleeve 4 to a certain extent, improving the axial stability of the rotating shaft 3.

[0028] In addition, in the application process of the present invention, the lubricating cavity channel 7 between the supporting sleeve 4 and the bearing bush 2 allows lubricating oil to flow. During high-speed rotation, the lubricating oil can play a soft support role, reducing operating noise and eliminating operating jitter. At the same time, when the lubricating oil flows in the lubricating cavity channel 7, it can also carry heat out from the deep parts of the supporting sleeve 4 and the bearing bush 2, better realizing heat dissipation.

[0029] Since the present invention adopts the design of multiple bearing bush rings 6, and the bearing bush rings 6 themselves are relatively thin in thickness, for some occasions that require heavy loads, it is better to strengthen the strength of the bearing bush rings 6 to further improve the stability of the support. For this reason, a better way of the present invention can also be, as Figure 1 and 4 shown, multiple inner-section strengthening holes 8 extending radially along the bearing bush ring 6 are arranged inside each bearing bush ring 6. The inner-section strengthening holes 8 extend to the outer surface of the bearing bush 2. Outer-section strengthening holes 9 are arranged at the positions on the bearing seat 1 corresponding to the inner-section strengthening holes 8. Strengthening core rods 10 are inserted into the inner-section strengthening holes 8 and the outer-section strengthening holes 9. The strengthening core rods 10 can be made of high-strength alloy steel. It can play a role of radially pulling the bearing bush ring 6 and axially strengthening it, ensuring the strength of the bearing bush ring 6 and preventing the bearing bush ring 6 from deforming.

[0030] Regarding the assembly form between the bearing seat 1 and the bearing bush 2, in order to improve the installation stability, as Figure 6 shown, an inwardly protruding ring platform 11 is arranged on the inner surface of the middle section of the bearing seat 1. As Figure 5 shown, a positioning groove 12 matching the ring platform 11 is arranged on the outer side wall of the bearing bush 2. The bearing bush 2 is clamped outside the ring platform 11 through the positioning groove 12. As Figure 1As shown in the figure, lubricating oil boxes 13 are formed between the two end faces of the bearing housing 1 and the annular platforms 11, the bearing bushes 2, and the support sleeves 4. Sealing end covers 14 adapted to each other are provided between the two end faces of the bearing housing 1 and the rotating shaft 3. Considering the convenience of assembly, the bearing housing 1, the bearing bushes 2, and the support sleeves 4 are all composed of upper and lower halves. After the upper and lower halves are assembled, the complete bearing housing 1, bearing bushes 2, and support sleeves 4 can be formed. As Figure 2 and 3 As shown in the figure, in order to further ensure the connection between the upper and lower halves of the support sleeve 4, splicing edges 21 are provided at the opposite edges of the ends of the upper and lower halves of the support sleeve 4, and the splicing edges 21 are locked by socket bolts 22.

[0031] In the present invention, the support sleeve 4 and the bearing bush 2 are generally made of copper alloy, having excellent wear resistance, lubricity, and mechanical strength. The specific material composition can refer to the materials of copper alloy bearing bushes in the prior art. Through the combination of the tile rings 6 and the deep grooves (i.e., the support grooves 5), the present invention effectively reduces the risk of high-temperature deformation of the support sleeve 4 and the bearing bush 2. On this basis, in order to further improve the heat conduction efficiency between the two at the deep part, a better method of the present invention can be as described below.

[0032] As Figure 2 and 3 As shown in the figure, a plurality of forced flow holes 15 are provided on the outer side groove walls of the support grooves 5 corresponding to both ends of the support sleeve 4. As Figure 1 As shown in the figure, for the convenience of clear illustration, in Figure 1 the forced flow holes 15 are shown in the form of straight holes, but actually they are inclined holes as Figure 2 shown in the figure. One end of the forced flow hole 15 is communicated with the lubricating oil box 13 in the bearing housing 1, and the other end is communicated with the lubricating cavity 7. The forced flow holes 15 penetrate the groove wall obliquely, and a plurality of forced flow holes 15 are evenly distributed in a ring around the center of the support sleeve 4.

[0033] Communication holes 16 are also provided on the side walls at both ends of the bearing housing 1. The inner ends of the communication holes 16 are communicated with the lubricating oil boxes 13 at both ends of the bearing housing 1, and the outer ends of the two communication holes 16 are communicated through a communication pipe 17.

[0034] During the rotation of the rotating shaft 3, the lubricating oil can be forced into the lubricating cavity 7 through the forced flow holes 5, thereby promoting the flow of the lubricating oil in the lubricating cavity 7. After the lubricating oil flows into one end of the lubricating cavity 7, it flows out from the forced flow holes 5 at the other end and is replenished into the front lubricating oil box 13 through the communication holes 16 and the communication pipe 17. At the same time, in order to ensure that the lubricating oil can be stably sucked in and sent out from the forced flow holes 15, oil passage sealing rings 18 are provided between the two ends of the bearing bush 2 and the support sleeve 4.

Claims

1. A high-stability copper alloy sliding bearing, characterized in that: It includes a bearing housing (1), a bearing bush (2) installed in the bearing housing (1), and a shaft support mechanism fixedly installed on a rotating shaft (3); the rotating shaft (3) can pass through the bearing bush (2) through the shaft support mechanism and form a rotational fit with the bearing bush (2). The shaft support mechanism includes a support sleeve (4). Multiple annular support grooves (5) are provided on the outer side wall of the support sleeve (4). The inner side wall of the bearing bush (2) is provided with multiple annular bush rings (6) corresponding to the number of the support grooves (5). The bush rings (6) of the bearing bush (2) extend into the support grooves (5) of the support sleeve (4) and form a sliding fit with the support sleeve (4); the gap between the bearing bush (2) and the support sleeve (4) forms a lubricating channel (7) for the lubricating oil to flow. An inwardly protruding ring platform (11) is provided on the inner surface of the middle section of the bearing housing (1). A positioning groove (12) that cooperates with the ring platform (11) is provided on the outer side wall of the bearing bush (2). The bearing bush (2) is clamped outside the ring platform (11) through the positioning groove (12); a lubricating oil box (13) is formed between the two end faces of the bearing housing (1), the ring platform (11), the bearing bush (2), and the support sleeve (4); sealing end caps (14) adapted to each other are provided between the two end faces of the bearing housing (1) and the rotating shaft (3). Communication holes (16) are further provided on the side walls at both ends of the bearing housing (1). The inner ends of the communication holes (16) communicate with the lubricating oil boxes (13) at both ends of the bearing housing (1), and the outer ends of the two communication holes (16) are communicated through a communication pipe (17).

2. The highly stable copper alloy sliding bearing according to claim 1, wherein: Multiple inner-section strengthening holes (8) extending radially along the bush ring (6) are provided inside each bush ring (6). The inner-section strengthening holes (8) extend to the outer surface of the bearing bush (2). Outer-section strengthening holes (9) are provided at the corresponding positions on the bearing housing (1) for the inner-section strengthening holes (8). Strengthening core rods (10) are inserted into the inner-section strengthening holes (8) and the outer-section strengthening holes (9).

3. The highly stable copper alloy sliding bearing according to claim 2, wherein: Multiple forced flow holes (15) are provided on the groove walls on the outer sides corresponding to the support grooves (5) at both ends of the support sleeve (4). One end of each forced flow hole (15) communicates with the lubricating oil box (13) inside the bearing housing (1), and the other end communicates with the lubricating channel (7); the forced flow holes (15) penetrate the groove wall obliquely, and multiple forced flow holes (15) are evenly distributed in a ring around the center of the support sleeve (4).

4. The highly stable copper alloy sliding bearing according to claim 3, characterized in that: Oil channel sealing rings (18) are provided between the two ends of the bearing bush (2) and the support sleeve (4).

5. The highly stable copper alloy sliding bearing according to claim 4, wherein: An annular clamping groove (19) is provided on the side wall of the rotating shaft (3). The support sleeve (4) is clamped in the clamping groove (19) and locked with the rotating shaft (3) through a shaft bolt (20).

6. The highly stable copper alloy sliding bearing according to claim 5, characterized in that: At least three support grooves (5) are provided on the support sleeve (4).

7. The highly stable copper alloy sliding bearing according to claim 6, wherein: The bearing housing (1), the bearing bush (2), and the support sleeve (4) are all composed of upper and lower halves.

8. The highly stable copper alloy sliding bearing according to claim 7, characterized in that: Splicing edges (21) are provided on the opposite edges of the ends of the upper and lower halves of the support sleeve (4). The splicing edges (21) are locked through a sleeve bolt (22).

9. The highly stable copper alloy sliding bearing according to claim 8, characterized in that: Both the support sleeve (4) and the bearing shell (2) are made of copper alloy.

Images