A bearing leakage-stopping and cooling device

Abstract

The application belongs to the technical field of bearings and provides a bearing leakage-stopping and temperature-reducing device, which comprises a main shaft, a bearing with an oil cover and an end cover plate, and the main shaft extends outward from the bearing at one end, and the main shaft outwardly extending end from the bearing is provided with a gradually changing shell, and the inner side of the gradually changing shell is provided with static vanes; the main shaft located at the inner side of the gradually changing shell and continuously extending outward relative to the static vanes is provided with dynamic vanes with a rotating direction at the peripheral end; since the application adopts a non-contact sealing mode, the dynamic vanes and the static vanes are used to generate pressurized air blowing sealing to seal, a stable airflow with a certain air pressure is formed on the surface of the main shaft to prevent the outflow of lubricating oil; since the directional air flow is increased along the direction of the main shaft, the oil delivery amount of the oil throwing disc in the bearing to the bearing bush can be increased, the friction between the oil throwing disc and the bearing bush is effectively reduced, and thus the working temperature of the bearing is significantly reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of bearings in electromechanical equipment, and in particular relates to a bearing leakage prevention and temperature reduction device. Background Art

[0002] In the existing electromechanical design and manufacturing, the rotating part is supported by various bearings, among which liquid bearings are a relatively common bearing. Liquid bearings are mainly composed of: bearing seats, bearing covers, coolers, radial bearings, thrust bearings, journals, thrust mirror plates (oil-slinging pans, thrust heads), oil collecting covers, end covers, etc. Because lubricating oil is needed to ensure the normal operation of the bearings, there must be a gap between the rotating main shaft and the stationary bearings. Therefore, a leak-proof seal must be set for this gap to prevent the lubricating oil in the bearing from flowing out from the gap between the main shaft and the bearing end cover, affecting the normal operation of the rotating electromechanical equipment.

[0003] Liquid bearing seals typically use a contact-type sealing method, using flexible materials such as felt to fill the gap between the moving spindle and the fixed end cover. This sealing method offers the advantages of a simple structure and easy installation. However, when the electromechanical equipment is operating, friction between the sealing felt and the spindle as it rotates generates high temperatures, causing the felt to age and lose its elasticity. Furthermore, wear and tear further widens the gap between the spindle and the felt, making it prone to lubricating oil leakage. This requires frequent maintenance, and oil spills can often compromise hygiene. Furthermore, when significant oil leakage occurs between the oil cover and the spindle, the bearing pads within the bearing are not properly lubricated, leading to excessive bearing temperatures.

[0004] Therefore, designing a non-contact bearing sealing device that is easy to install and has a simple structure is a technical problem that needs to be solved urgently in this field. Summary of the Invention

[0005] The present invention provides a bearing leakage prevention and cooling device, which aims to solve the oil leakage problem caused by poor sealing when the main shaft of the existing liquid bearing rotates. It has the characteristics of simplicity, high efficiency, durability and no maintenance, and can also reduce the bearing temperature.

[0006] The present invention is achieved by providing a bearing leakage prevention and cooling device, comprising a main shaft, a bearing with an oil cover and an end cover, one end of the main shaft extending outward from the bearing, the end of the main shaft extending outward from the bearing being provided with a gradually deformed housing, the inner side of the gradually deformed housing being provided with a stationary blade;

[0007] The moving blades are arranged on the main shaft and are used to cooperate with the stationary blades to form a pressurized airflow input into the bearing.

[0008] Optionally, the rotation direction of the stationary blades is opposite to that of the moving blades.

[0009] Optionally, the gap between the stationary blades and the moving blades is 0.2-1 mm.

[0010] Optionally, the gradually deformed shell structure is a hollow structure with a gradually decreasing inner diameter.

[0011] Optionally, the small-diameter head of the gradually deformed shell is fixedly connected to the circular hole of the end cover plate, and the large-diameter head is in communication with the air.

[0012] Optionally, the moving blades are fixed to the main shaft by welding or hoop means.

[0013] Compared with the prior art, the beneficial technical effects of the present invention are: first, since the present invention adopts a non-contact sealing method and uses the dynamic blades and static blades to generate a pressurized blowing seal for sealing, a stable airflow with a certain air pressure is formed on the surface of the main shaft, so as to achieve a simple, durable and efficient way to prevent the outflow of lubricating oil; secondly, since a high-speed directional air flow is added along the main shaft direction, it can prevent oil leakage from the gap between the oil cover and the main shaft, increase the oil supply from the oil flinger plate to the bearing, effectively reduce the friction between the oil flinger plate (thrust head, thrust mirror plate) and the thrust bearing and between the journal and the radial bearing, reduce frictional heat, and at the same time, the airflow also enhances the heat dissipation of the oil cover and the lubricating oil, thereby significantly reducing the operating temperature of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a cross-sectional view of the bearing anti-leakage device of the present invention;

[0015] Figure 2 yes Figure 1 A partial enlarged view of area A in the middle;

[0016] Figure 3 yes Figure 1 A partial enlarged view of area B in the middle;

[0017] Figure 4 is a schematic diagram of the interior of the gradual deformation housing of the present invention;

[0018] Figure 5 It is a schematic diagram of the spindle end face of the present invention.

[0019] In the figure: 1. Bearing; 2. Main shaft; 201. Moving blade; 3. Oil cover; 4. End cover; 5. Gradient-shaped housing; 501. Stationary blade; 6. Oil-slinging plate (thrust head); 7. Axial thrust washer; 8. Wool felt ring; 9. Radial thrust washer; 10. Shaft journal; 11. Cooling device. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more, and "several" means one or more.

[0022] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0023] like Figures 1-3 As shown, the present invention provides a bearing leakage prevention and cooling device, including a bearing 1 with a main shaft 2, an oil cover 3 and an end cover plate 4, one end of the main shaft 2 extends outward from the bearing 1, and the end of the main shaft 2 extending outward from the bearing 1 is provided with a gradient shell 5, and the inner side of the gradient shell 5 is provided with a static blade 501; specifically, the shape, size and size of the gradient shell 5 can be selected but not limited to arbitrarily set according to the type, weight, size and size of the bearing 1 and the main shaft 2, and its main purpose is to form a convergence channel to achieve the convergence of external air.

[0024] For example, Figure 2 and Figure 4 As shown, the gradually deforming housing 5 preferably has a hollow structure with a gradually decreasing inner diameter. The smaller diameter end of the gradually deforming housing is aligned with the circular hole (not shown in the figure, as the circular hole is used for the spindle to pass through the end cover) of the end cover and secured to the end cover, for example, using screws. The larger diameter end is in communication with the air, thus forming a funnel-shaped air collector.

[0025] The main shaft 2 is located inside the gradually deformed housing 5 and extends outwardly relative to the stationary blades 501 . A rotating blade 201 is provided on one end of the main shaft 2 for cooperating with the stationary blades 501 to form a pressurized airflow input into the bearing 1 .

[0026] Specifically, the rotation direction of the stator blades 501 is opposite to that of the rotor blades 201. As the rotor blades 201 rotate, they obliquely compress the air on their bearing surfaces, moving them perpendicularly to the blade surface. This creates a negative pressure zone at the original location, generating air flow. Due to inertial centrifugal force, air is thrown toward the edges of the rotor blades 201. The stator blades 501 redirect the airflow generated by the rotor blades 201, allowing the air entering from the large-diameter head to flow more smoothly into the small-diameter head of the gradient housing 5, resulting in increased airflow along the main shaft surface and into the bearing 1.

[0027] The advantage of this embodiment is that, by utilizing the cooperation between the moving blades 201 and the stationary blades 501 , a stable and directional air flow is formed, thereby preventing the lubricating fluid in the bearing 1 from flowing out.

[0028] The advantage of this embodiment is that the rotation direction of the stationary blades 501 is opposite to that of the moving blades 201, which can effectively convert the ineffective annular airflow generated by the moving blades 201 into effective axial airflow and gas pressure potential energy, forming a stable air flow blowing axially into the bearing to achieve the blocking of the lubricating fluid.

[0029] In a specific embodiment, the wool felt ring 8 located at the end cover plate 4 is eliminated, so that a frictionless seal of the main shaft can be achieved.

[0030] like Figure 2 As shown in the figure, as a preferred embodiment, the gap between the stationary blades 501 and the moving blades 201 is 0.2-1 mm. This arrangement can avoid interference between the moving blades and the stationary blades, and on the other hand, it can further ensure the stability of the airflow, the efficiency of the compressed gas, and improve the sealing effect of the lubricating fluid.

[0031] Example 1

[0032] During use, when the bearing runs at high speed, the moving blades 201 form a high-speed airflow blowing toward the bearing 1, and then the airflow is converged under the guiding action of the gradually deformed shell 5, and then decelerated and guided by the stationary blades 501 to form a stable airflow with a certain air pressure blowing along the surface of the main shaft into the bearing 1, so as to achieve the sealing of liquid leakage in the gap between the main shaft 2 and the end cover plate 4.

[0033] Example 2

[0034] Reference Figure 1, the arrows indicate the flow direction of the lubricant. The lubricant in the cooling device 11 enters the thrust bearing through the pipeline at the oil-slinging plate 6. The oil-slinging plate 6 brings the oil to a high position, and drains it to the space between the thrust pad 7 and the thrust head 6, and between the radial pad 9 and the journal 10 through the oil cover and the oil channel. As the main shaft 2 rotates at high speed, an oil film is generated between the part of the main shaft 2 located at the journal 10 and the radial pad 9, as well as between the thrust pad 7 and the thrust head 6, thereby avoiding direct friction of solids and greatly reducing frictional resistance. The lubricating oil not only reduces frictional heat and improves efficiency, but also takes away heat and reduces pad temperature. The oil that has absorbed frictional heat is cooled by the cooling device and then flows to the oil-slinging plate for recycling. At this time, a stable airflow with a certain air pressure generated by the cooperation of the moving blades 201 and the stationary blades 501 flows along the main shaft 2. When it blows to the gap between the main shaft 2 and the oil cover 3, under the action of this airflow, oil leakage from the gap between the oil cover 1 and the main shaft 2 is prevented, the amount of lubricant delivered by the oil-slinging plate 6 to the axial thrust pad 7 is increased, the heat on the radial thrust pad 9 is quickly taken away, and the friction between the main shaft 2 and the radial thrust pad 9 is reduced, so as to achieve the purpose of significantly reducing the internal temperature of the bearing 1.

[0035] The bearing leakage prevention device proposed in this invention is not only suitable for electromechanical equipment with horizontal bearings, especially horizontal turbines. It can also prevent leakage and reduce the temperature of bearings in turbines or motors with vertically arranged main shafts.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements 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 bearing leakage prevention and cooling device, comprising a main shaft (2), a bearing (1) with an oil cover (3) and an end cover (4), wherein one end of the main shaft (2) extends outward from the bearing (1), and is characterized in that: One end of the main shaft (2) extending outward from the bearing (1) is provided with a gradually deformed outer shell (5), and a stationary blade (501) is provided inside the gradually deformed outer shell (5); A moving blade (201) is provided on the main shaft (2) and is used to cooperate with the stationary blade (501) to form a pressurized airflow input into the bearing (1); The structure of the gradually deformed shell (5) is a hollow structure with a gradually decreasing inner diameter, wherein the small diameter end of the gradually deformed shell (5) is fixedly connected to the end cover plate, and the large diameter end is in communication with the air; The rotation direction of the stationary blades (501) is opposite to that of the moving blades (201).

2. The bearing leakage prevention and cooling device according to claim 1, characterized in that: The gap between the stationary blade (501) and the moving blade (201) is 0.2-1 mm.

3. The bearing leakage prevention and cooling device according to claim 1, characterized in that: The moving blades (201) are fixed on the main shaft (2) by welding or hoop.

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