Radial bearing cooling device

Abstract

The utility model discloses a radial tilting pad bearing cooling device, and relates to the technical field of bearing cooling, the radial tilting pad bearing cooling device comprises a bearing body, a rotating shaft is rotatably connected in the bearing body, the radial tilting pad bearing cooling device comprises a fixing bolt, a tilting bearing bush, an oil supply screw and a cooling hole, and the fixing bolt is provided with a plurality of threads penetrating through the bearing body. The penetrating exposed side is in threaded connection with an inclinable bearing bush; the tilting bearing bushes are arranged in sections and correspond to the fixing bolts; threads of the oil supply screws penetrate through the bearing body and are located at the gap adjacent to the tilting bearing bush, tilting openings are formed in the side walls of the oil supply screws, and oil outlets are formed in the sides, facing the rotating shaft, of the oil supply screws; the cooling hole penetrates through the tiltable bearing bush. The cooling hole penetrates through the tilting bearing bush and is used for cooling the rotating shaft and the tilting bearing bush, expansion friction caused by too high temperature is avoided, oil supply lubrication cooling of the rotating shaft and the tilting bearing bush is achieved through the oblique opening of the oil supply screw, the complexity of the oil supply device is reduced, and machining is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing cooling, and more specifically, to a radial bearing cooling device. Background Art

[0002] Tilt-pad bearings are a type of bearing used in centrifugal compressors, high-speed gearboxes, and industrial steam turbines. Because their pads can oscillate with the displacement of the shaft journal, they provide excellent damping properties, resulting in extremely stable rotors during operation.

[0003] Due to its excellent stability, it is widely used in various high-speed turbine equipment. Existing tilting pad bearings can ensure continuous operation, which requires maintaining the bearing pad temperature to avoid overheating, expansion and deformation. However, due to its extremely high speed and operating characteristics, problems such as excessive bearing temperature and local overheating often occur during operation. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides a radial bearing cooling device.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a radial bearing cooling device, comprising a bearing body, wherein a rotating shaft is rotatably connected to the inside of the bearing body, and the special feature is that it also includes a fixing bolt, a tilting bearing, an oil supply screw and a cooling hole, wherein the fixing bolt has multiple threads passing through the bearing body, and the threads on the exposed side are connected to the tilting bearing; there are multiple tilting bearings, which are arranged in sections, and corresponding to the fixing bolts, they have an arc-shaped concave surface facing the rotating shaft; there are multiple oil supply screws, whose threads pass through the bearing body and are located adjacent to the gap between the tilting bearing, the side wall of the oil supply screw is provided with an inclined port, and an oil outlet is provided toward the rotating shaft; the cooling hole passes through the tilting bearing, one end of which faces the inclined port, and the other end faces the gap between the tilting bearing through which the cooling hole passes and the adjacent tilting bearing away from the inclined port.

[0006] As a further preference of the present invention, the cooling hole is inclined and passes through the tilting bearing. The starting position of the cooling hole is on the side of the tilting bearing away from the rotating shaft, and it is inclined toward the oil supply screw. The ending position of the cooling hole is located on the side of the tilting bearing close to the rotating shaft, and it is inclined toward the oil outlet of the oil supply screw along the rotation direction of the bearing body, so as to avoid the difficulty of cooling the near-axis side of the lubricating oil due to centrifugal reasons.

[0007] As a further preference of the present invention, three oil supply screws are arranged in the axial longitudinal section, and the oil supply screws on both sides are symmetrically arranged on both sides of the middle oil supply screw and inclined away from the middle oil supply screw. The axis of the middle oil supply screw is perpendicular to the rotating shaft section. The setting of multiple oil supply screws balances the axial force while improving the oil supply effect.

[0008] As a further preference of the present invention, the cooling hole is threadedly connected to an oil control plug at one end away from the inclined port of the oil supply screw, and the oil control plug has an oil drain hole at one end toward the oil outlet of the oil supply screw, which can ensure that the lubricating oil entering the cooling hole has enough time to take away the heat of the tile and then be discharged from the oil drain hole designed by the plug.

[0009] As a further preferred embodiment of the present invention, a lubricating pad is provided at the arc-shaped concave surface to maintain the stability of the oil film. With the help of the fluid dynamic pressure of the lubricating oil film, a load-bearing oil wedge is formed between the shoe surface and the journal surface. This oil wedge completely breaks away from contact between the two surfaces, thereby avoiding direct friction and wear between the metals.

[0010] Technical effects and advantages of the utility model:

[0011] 1. The radial bearing cooling device of the utility model is provided with a cooling hole penetrating the tilting bearing to cool the rotating shaft and the tilting bearing, thereby preventing the expansion and friction caused by excessive temperature, thereby increasing the service life and the ability to operate continuously.

[0012] 2. By setting the oblique opening of the oil supply screw, oil lubrication for the rotating shaft and cooling of the tilting bearing are achieved, the number of oil supply ports is reduced, and they are guided to the direction of the oil supply screw. There is no need to add an additional oil return port, which reduces the complexity of the oil supply device and facilitates processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural schematic diagram of a radial bearing cooling device of the present utility model.

[0014] Figure 2 for Figure 1 BB side cross-sectional view.

[0015] Figure 3 for Figure 1 Enlarged view of point A.

[0016] The accompanying drawings are marked as follows: 1. bearing body; 2. fixing bolt; 3. tilting bearing; 4. oil supply screw; 5. cooling hole; 6. oil control plug; 7. rotating shaft; 8. lubrication pad; 401. tilting port; 402. oil outlet. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] See attached Figure 1-3 As shown, a radial bearing cooling device includes a bearing body 1, in which a rotating shaft 7 is rotatably connected inside the bearing body 1, and also includes a fixing bolt 2, a tilting bearing shell 3, an oil supply screw 4 and a cooling hole 5. The fixing bolt 2 has multiple threads passing through the bearing body 1, and the exposed side thereof is threadedly connected to the tilting bearing shell 3; there are multiple tilting bearing shells 3, which are arranged in sections, and corresponding to the fixing bolts 2, the side thereof facing the rotating shaft 7 is an arc-shaped concave surface; there are multiple oil supply screws 4, whose threads pass through the bearing body 1 and are located in the gap adjacent to the tilting bearing shell 3, and the side wall of the oil supply screw 4 is provided with an inclined port 401, and the side thereof is provided with an oil outlet 402 toward the rotating shaft 7; the cooling hole 5 passes through the tilting bearing shell 3, one end of which faces the inclined port 401, and the other end faces the gap between the tilting bearing shell 3 passed by the cooling hole 5 and the adjacent tilting bearing shell 3 away from the inclined port 401.

[0019] like Figure 1 and 3 As shown, in the embodiment of the present utility model, the cooling hole 5 is obliquely passed through the tilting bearing 3, and the starting position of the cooling hole 5 is on the side of the tilting bearing 3 away from the rotating shaft 7, and it is directed toward the inclined opening 401 of the oil supply screw 4; the ending position of the cooling hole 5 is located on the side of the tilting bearing 3 close to the rotating shaft 7, and it is directed toward the oil outlet 402 of the oil supply screw 4 along the rotation direction of the bearing body 1, so as to avoid the difficulty of cooling the near-axis side of the lubricating oil due to centrifugal reasons.

[0020] like Figure 2 As shown, in an embodiment of the present utility model, three oil supply screws 4 are provided in the axial longitudinal section, and the oil supply screws 4 on both sides are symmetrically arranged on both sides of the middle oil supply screw 4 and inclined away from the middle oil supply screw 4. The axis of the middle oil supply screw 4 is perpendicular to the section of the rotating shaft 7. The setting of multiple oil supply screws 4 balances the axial force while improving the oil supply effect.

[0021] During the operation of the present invention, oil is supplied to the top of the oil supply screw 4, and the cooling oil is sprayed toward the shaft through the oil outlet 402, and toward the cooling hole 5 through the inclined port 401; the cooling hole 5 passes through the tilting bearing 3, thereby realizing the cooling of the rotating shaft 7 and the tilting bearing 3, avoiding expansion and friction caused by excessive temperature, increasing its service life, and the ability to operate continuously, and through the setting of the oblique opening of the oil supply screw 4, lubrication and cooling of the rotating shaft 7 and oil supply to the tilting bearing 3 are realized, the number of oil supply ports is reduced, and the oil is guided toward the direction of the oil supply screw 4, without the need for an additional oil return port, thereby reducing the complexity of the oil supply device and facilitating processing.

[0022] like Figure 3 As shown, in the embodiment of the present utility model, the cooling hole 5 is threadedly connected to an oil control screw plug 6 at one end away from the inclined port 401 of the oil supply screw 4, and the oil control screw plug 6 is provided with an oil drain hole at one end toward the oil outlet 402 of the oil supply screw 4, which can ensure that the lubricating oil entering the cooling hole 5 has enough time to take away the heat of the tile and then be discharged from the oil drain hole designed by the screw plug.

[0023] like Figure 1 and Figure 3 As shown, in the embodiment of the present utility model, a lubricating pad 8 is provided on the arc-shaped concave surface.

[0024] During the operation of the present invention, oil is sprayed toward the rotating shaft 7 through the oil outlet 402 to form an oil film. The stability of the oil film is maintained by the setting of the lubricating pad 8. With the help of the fluid dynamic pressure of the lubricating oil film, a load-bearing oil wedge is formed between the tile surface and the journal surface. This oil wedge completely breaks away from contact between the two surfaces, thereby avoiding direct friction and wear between the metals.

[0025] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A radial bearing cooling device, comprising a bearing body, wherein a rotating shaft is rotatably connected to the interior of the bearing body, characterized in that: It also includes a fixing bolt, a tilting bearing, an oil supply screw and a cooling hole, wherein the fixing bolt has multiple threads that penetrate the bearing body, and the exposed side of the fixing bolt is threadedly connected to the tilting bearing; There are multiple tilting bearings, which are arranged in sections and correspond to the fixing bolts, and the sides facing the rotating shaft are arc-shaped concave; There are multiple oil supply screws, whose threads penetrate the bearing body and are located adjacent to the gap of the tilting bearing pad. The side wall of the oil supply screw is provided with an inclined opening, and an oil outlet is provided toward the rotating shaft. The cooling hole passes through the tilting bearing, with one end thereof facing the tilting opening and the other end thereof facing the gap between the tilting bearing through which the cooling hole passes and the adjacent tilting bearing away from the tilting opening.

2. The radial bearing cooling device according to claim 1, characterized in that: The cooling hole is inclined and passes through the tilting bearing. The starting position of the cooling hole is on the side of the tilting bearing away from the rotating shaft, and it is inclined toward the oil supply screw. The ending position of the cooling hole is on the side of the tilting bearing close to the rotating shaft, and it is inclined toward the oil supply screw outlet along the rotation direction of the bearing body.

3. The radial bearing cooling device according to claim 1, characterized in that: There are three oil supply screws in the axial longitudinal section, and the oil supply screws on both sides are symmetrically arranged on both sides of the middle oil supply screw and inclined away from the middle oil supply screw. The axis of the middle oil supply screw is perpendicular to the rotating shaft section.

4. The radial bearing cooling device according to claim 1, characterized in that: An oil control screw plug is threadedly connected to one end of the cooling hole away from the inclined opening of the oil supply screw, and an oil drain hole is formed on one end of the oil control screw plug toward the oil outlet of the oil supply screw.

5. The radial bearing cooling device according to claim 1, characterized in that: A lubricating pad is provided on the arc-shaped concave surface.

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