Bearing lubrication systems and rotating equipment

Abstract

The present application provides a bearing lubrication system and rotating equipment. The bearing lubrication system includes a shaft, a bearing, a lubricating oil tank, a high-level oil tank, a low-level oil tank, and a circulating pump. During operation of the circulating pump, the liquid level of the lubricating medium in the high-level oil tank and the low-level oil tank is greater than a preset liquid level, and the liquid level of the lubricating medium in the lubricating oil tank is close to or equal to 0. The present application provides a high-level oil tank and a low-level oil tank connected to the lubricating oil tank, and utilizes a circulating pump to transfer the lubricating medium from the low-level oil tank to the high-level oil tank, so that the liquid level of the lubricating medium in the lubricating oil tank is close to or equal to 0, thereby achieving a zero liquid level in the lubricating oil tank. This can thereby avoid the generation of foam and oil mist in the lubricating oil tank due to the rotation of the shaft relative to the bearing.

Description

Technical Field

[0001] The present application relates to the technical field of bearing lubrication, and in particular to a bearing lubrication system and a rotating device. Background Art

[0002] Currently, for large rotating equipment, since its rotation process generates a lot of heat, it is necessary to immerse the bearings in an oil tank to reduce the bearing temperature.

[0003] Taking the generator motor of large rotating equipment for pumped storage as an example, the generator motor has a shaft with a sliding rotor extending from the surface of the shaft. The guide bearing and the thrust bearing are in contact with the sliding rotor. The guide bearing is in contact with the side of the sliding rotor to limit the radial movement of the shaft, and the thrust bearing is in contact with the bottom of the sliding rotor to limit the axial movement of the sliding rotor. The guide bearing, sliding rotor and thrust bearing are all immersed in an oil tank to reduce the temperature of the guide bearing, sliding rotor and thrust bearing.

[0004] However, since the bearings are immersed in the oil tank, the rotation of the sliding rotor relative to the bearings also stirs the lubricating medium in the oil tank, causing foam and oil mist to form in the oil tank. The oil mist overflows the oil tank and adheres to the generator, which may cause a short circuit and affect the safe and stable operation of the generator motor.

[0005] In this regard, the applicant has proposed a guide bearing oil supply device with a high-level oil tank (Chinese Patent Publication No. CN204239129U), which lubricates the guide bearing in a spraying manner through the high-level oil tank and the oil spray branch pipe. There is no need to immerse both the sliding rotor and the bearing in the lubricating medium, thereby reducing the liquid level of the lubricating medium in the oil tank, which is conducive to reducing the foam and oil mist generated by the oil tank.

[0006] Although this solution can reduce bearing foam and oil mist, a certain level of lubricant must still be present in the oil tank to prevent the pump from sucking in air. Because there is a certain level of lubricant in the oil tank, foam and oil mist will still be generated in the oil tank, and it cannot be completely eliminated. Summary of the Invention

[0007] The present application provides a bearing lubrication system and a rotating device, aiming to solve the current technical problem of the presence of foam and oil mist in the bearing lubricating oil tank of large rotating equipment.

[0008] In a first aspect, the present application provides a bearing lubrication system, comprising:

[0009] axis;

[0010] Bearings, bearings and shafts fit together;

[0011] A lubricating oil tank enclosing a bearing;

[0012] High-position oil tank: the height of the high-position oil tank relative to the bearing is higher than the height of the lubricating oil tank relative to the bearing;

[0013] Low-position oil tank: the horizontal height of the low-position oil tank relative to the bearing is lower than the horizontal height of the lubricating oil tank relative to the bearing;

[0014] Circulation pump, the inlet of the circulation pump is connected to the low-level oil tank through a pipeline, and the outlet of the circulation pump is connected to the high-level oil tank through a pipeline;

[0015] Among them, the high-level oil tank is connected to the lubricating oil tank through a pipeline, and the lubricating oil tank is connected to the low-level oil tank through a pipeline. During the operation of the circulating pump, the liquid level of the lubricating medium in the high-level oil tank and the low-level oil tank is greater than the preset liquid level, and the liquid level of the lubricating medium in the lubricating oil tank is close to or equal to 0.

[0016] In some embodiments, during the operation of the circulating pump, the high-level oil tank is filled with lubricating medium.

[0017] In some embodiments, the volume of the low-level fuel tank is greater than the volume of the high-level fuel tank.

[0018] In some embodiments, the overhead fuel tank has a first inlet and a first outlet;

[0019] The first inlet is located on a side of the high-level fuel tank facing away from the low-level fuel tank or on the side of the high-level fuel tank, and the first outlet is located on a side of the high-level fuel tank adjacent to the low-level fuel tank;

[0020] The outlet of the circulation pump is connected to the first inlet of the high-position oil tank through a pipeline, and the first outlet of the high-position oil tank is connected to the lubricating oil tank through a pipeline.

[0021] In some embodiments, the low fuel tank has a second inlet and a second outlet;

[0022] The second inlet is located on a side of the low-level fuel tank adjacent to the high-level fuel tank, and the second outlet is located on a side of the low-level fuel tank away from the high-level fuel tank;

[0023] The inlet of the circulation pump is connected to the second outlet of the low-level oil tank through a pipeline, and the second inlet of the low-level oil tank is connected to the lubricating oil tank through a pipeline.

[0024] In some embodiments, the high-level fuel tank includes a first high-level fuel tank and a second high-level fuel tank;

[0025] During the operation of the circulating pump, the first high-level oil tank is filled with lubricating medium, and the volume of the second high-level oil tank is greater than the volume of the lubricating medium therein.

[0026] In some embodiments, the volume of the second high-level fuel tank is greater than the volume of the first high-level fuel tank.

[0027] In some embodiments, the outlet of the circulation pump is connected to the first high-level oil tank via a first pipeline and is connected to the second high-level oil tank via a second pipeline;

[0028] The first high-level oil tank is connected to the lubricating oil tank via a third pipeline, and the second high-level oil tank is connected to the lubricating oil tank via a fourth pipeline;

[0029] Among them, a first valve is provided on the second pipeline, and a second valve is provided on the fourth pipeline. During the operation of the circulating pump, the first valve and the second valve are in a normally closed state.

[0030] In some embodiments, further comprising a cooler;

[0031] The cooler is installed between the circulating pump and the low-level oil tank; or

[0032] The cooler is arranged between the circulation pump and the high-level oil tank.

[0033] In some embodiments, the shaft includes a shaft body and a sliding rotor connected to the shaft body;

[0034] The bearing comprises a plurality of guide bearing pads, which are arranged in an annular array at intervals and in contact with the surface of the sliding rotor facing away from the shaft body, and a first oil supply pipe is provided between adjacent guide bearing pads; and / or

[0035] The bearing comprises a plurality of thrust bearing bushes which are arranged in an annular array at intervals and in contact with the surface of the sliding rotor facing the low-position oil tank. A second oil supply pipe is provided between adjacent thrust bearing bushes.

[0036] In some embodiments, the lubricating oil tank has an annular inner retaining wall, an annular outer retaining wall, and an annular bottom wall connected between the annular inner retaining wall and the annular outer retaining wall;

[0037] The sliding rotor extends toward the low-position oil tank, and the sliding rotor is spaced apart from the surface of the shaft body to form an annular cavity;

[0038] The annular inner retaining wall is located at the annular cavity, the annular outer retaining wall is located at the side of the sliding rotor away from the shaft body, and the annular bottom wall is located at the side of the sliding rotor adjacent to the low-position oil tank.

[0039] In some embodiments, the bearing includes a first bearing and a second bearing, the first bearing being engaged with one end of the shaft, and the second bearing being engaged with the other end of the shaft;

[0040] The lubricating oil tank includes a first lubricating oil tank enclosing the first bearing and a second lubricating oil tank enclosing the second bearing.

[0041] In some embodiments, the first lubricating oil tank is connected to the high-level oil tank via a pipeline, and the first lubricating oil tank is connected to the low-level oil tank via a pipeline; and / or

[0042] The second lubricating oil tank is connected to the high-position oil tank through a pipeline, and the second lubricating oil tank is connected to the low-position oil tank through a pipeline.

[0043] In some embodiments, the first lubricating oil tank is connected to the high-level oil tank via a pipeline, and the second lubricating oil tank is connected to the first lubricating oil tank via a pipeline;

[0044] The first lubricating oil tank is connected to the low-level oil tank via a pipeline; and / or

[0045] The second lubricating oil tank is connected to the low-level oil tank through a pipeline.

[0046] In a second aspect, the present application provides a rotating device comprising the bearing lubrication system as described in the first aspect.

[0047] The present application sets up a high-level oil tank and a low-level oil tank connected to the lubricating oil tank, and uses a circulating pump to transfer the lubricating medium from the low-level oil tank to the high-level oil tank. Since the horizontal height of the high-level oil tank relative to the bearing is higher than the horizontal height of the lubricating oil tank relative to the bearing, and the horizontal height of the low-level oil tank relative to the bearing is lower than the horizontal height of the lubricating oil tank relative to the bearing, the lubricating medium flows from the high-level oil tank to the lubricating oil tank under the influence of gravity for spray lubrication, and the lubricating medium in the lubricating oil tank also flows to the low-level oil tank under the influence of gravity. During the operation of the circulating pump, the liquid level of the lubricating medium in the high-level oil tank and the low-level oil tank is greater than the preset liquid level, and the liquid level of the lubricating medium in the lubricating oil tank is close to or equal to 0, thereby achieving zero liquid level in the lubricating oil tank, thereby avoiding foam and oil mist generated in the lubricating oil tank due to the rotation of the shaft relative to the bearing.

[0048] In addition, since the liquid level of the lubricating medium in the lubricating oil tank is close to or equal to 0, the height of the lubricating oil tank can be reduced, thereby reducing the distance between the bearing and the center line of the rotor shaft, ultimately achieving the purpose of shortening the shaft length and increasing the critical speed of the shaft system. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0050] Figure 1 This is a structural diagram of a bearing lubrication system provided in an embodiment of the present application;

[0051] Figure 2 is another structural schematic diagram of the bearing lubrication system provided in an embodiment of the present application;

[0052] Figure 3This is a structural diagram of the shaft, bearings, and lubricating oil tank provided in an embodiment of the present application;

[0053] Figure 4 This is a structural diagram of a high-position fuel tank provided in an embodiment of the present application;

[0054] Figure 5 This is a structural diagram of a low-level fuel tank provided in an embodiment of the present application;

[0055] Figure 6 is another structural schematic diagram of the bearing lubrication system provided in an embodiment of the present application;

[0056] Figure 7 This is a schematic diagram of the arrangement of the first oil supply pipe provided in an embodiment of the present application;

[0057] Figure 8 This is a schematic diagram of the arrangement of the second oil supply pipe provided in an embodiment of the present application;

[0058] Figure 9 This is a schematic diagram of the arrangement of the first oil supply pipe and the second oil supply pipe provided in an embodiment of the present application;

[0059] Figure 10 is another structural schematic diagram of the bearing lubrication system provided in an embodiment of the present application;

[0060] Figure 11 is another structural schematic diagram of the bearing lubrication system provided in an embodiment of the present application;

[0061] Figure 12 is another structural schematic diagram of the bearing lubrication system provided in an embodiment of the present application;

[0062] Figure 13 is another structural schematic diagram of the bearing lubrication system provided in an embodiment of the present application;

[0063] Figure 14 is another structural schematic diagram of the bearing lubrication system provided in an embodiment of the present application;

[0064] Figure 15 is another structural schematic diagram of the bearing lubrication system provided in an embodiment of the present application;

[0065] Figure 16 This is another structural schematic diagram of the bearing lubrication system provided in an embodiment of the present application.

[0066] Among them, 10 is the shaft, 11 is the shaft body, 12 is the sliding rotor, and 13 is the annular cavity;

[0067] 20 bearing, 21 guide bearing bush, 22 first oil supply pipe, 23 thrust bearing bush, 24 second oil supply pipe, 210 first bearing, 220 second bearing;

[0068] 30 lubricating oil tank, 31 annular inner retaining wall, 32 annular outer retaining wall, 33 annular top wall, 34 annular top wall, 310 first lubricating oil tank, 320 second lubricating oil tank;

[0069] 40 high-level oil tank, 41 first inlet, 42 second outlet, 410 first high-level oil tank, 420 second high-level oil tank, 430 first pipeline, 440 second pipeline, 450 third pipeline, 460 fourth pipeline, 470 first valve, 480 second valve;

[0070] 50 low-position oil tank, 51 second inlet, 52 second outlet, 60 circulating pump, 70 cooler, 80 rotor, 90 stator. DETAILED DESCRIPTION

[0071] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. 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 those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0072] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 present invention. In addition, the terms "first" and "second" 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, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0073] In this application, the word "exemplary" is used to mean "serving as an example, illustration, or illustration." Any embodiment described in this application as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is given to enable any person skilled in the art to make and use the invention. In the following description, details are listed for the purpose of explanation. It should be understood that one of ordinary skill in the art will recognize that the invention can be practiced without these specific details. In other instances, well-known structures and processes are not described in detail to avoid obscuring the description of the invention with unnecessary detail. Therefore, the present invention is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.

[0074] The embodiments of the present application provide a bearing lubrication system and a rotating device, which are described in detail below.

[0075] First, see Figure 1 , Figure 1 A structural diagram of a bearing lubrication system in an embodiment of the present application is shown, wherein the bearing lubrication system includes:

[0076] Axis 10;

[0077] Bearing 20, bearing 20 cooperates with shaft 10;

[0078] a lubricating oil tank 30 , the lubricating oil tank 30 enclosing the bearing 20 ;

[0079] A high-position oil tank 40 , wherein the height of the high-position oil tank 40 relative to the bearing 20 is higher than the height of the lubricating oil tank 30 relative to the bearing 20 ;

[0080] A low-position oil tank 50 , wherein the level of the low-position oil tank 50 relative to the bearing 20 is lower than the level of the lubricating oil tank 30 relative to the bearing 20 ;

[0081] A circulating pump 60, wherein the inlet of the circulating pump 60 is connected to the low-level oil tank 50 through a pipeline, and the outlet of the circulating pump 60 is connected to the high-level oil tank 40 through a pipeline;

[0082] Among them, the high-level oil tank 40 is connected to the lubricating oil tank 30 through a pipeline, and the lubricating oil tank 30 is connected to the low-level oil tank 50 through a pipeline. During the operation of the circulating pump 60, the liquid level of the lubricating medium in the high-level oil tank 40 and the low-level oil tank 50 is greater than the preset liquid level, and the liquid level of the lubricating medium in the lubricating oil tank 30 is close to or equal to 0.

[0083] Specifically, shaft 10 refers to the rotating shaft of any large rotating device, such as a generator motor, a water pump turbine, or a wind turbine. Generally, shaft 10 carries some rotating parts. For example, in a generator motor, a rotor 80 is mounted on shaft 10 , and a stator 90 is arranged around the rotor. The rotor 80 cuts through the magnetic field lines of the stator 90, thereby generating electricity.

[0084] In some embodiments of the present application, see Figure 2 , Figure 2 Another structural schematic diagram of the bearing lubrication system in an embodiment of the present application is shown, where the shaft 10 includes an axle body 11 and a sliding rotor 12 connected to the axle body 11, and the sliding rotor 12 is used to contact the bearing 20, thereby limiting the radial and axial movement of the shaft 10.

[0085] In some embodiments of the present application, the shaft 10 can be arranged vertically or horizontally, such as the rotating shaft of a horizontal generator or a vertical generator. It can be understood that the shaft 10 can also be arranged tilted.

[0086] The bearing 20 cooperates with the shaft 10 and is used to limit the radial and axial movement of the shaft 10. In some embodiments of the present application, for example, for an embodiment in which the shaft 10 includes a shaft body 11 and a sliding rotor 12 connected to the shaft body 11, see Figure 2 The bearing 20 includes a plurality of guide bearing pads 21 arranged in an annular array and in contact with the surface of the sliding rotor 12 facing away from the shaft body 11; and / or the bearing 20 includes a plurality of thrust bearing pads 23 arranged in an annular array and in contact with the surface of the sliding rotor 12 facing the low-level oil tank 50. The guide bearing pads 21 limit radial movement of the shaft 10, while the thrust bearing pads 23 limit axial movement of the shaft 10, thereby achieving the purpose of limiting both radial and axial movement of the shaft 10. It is understood that the bearing 20 may also include other structures, such as a bearing seat, an insulating plate, etc.

[0087] The lubricating oil tank 30 is used to enclose the bearing 20 so that the lubricating medium of the bearing 20 can be collected by the lubricating oil tank 30 and then returned to the low oil tank 50. In some embodiments of the present application, for example, for an embodiment in which the shaft 10 includes a shaft body 11 and a sliding rotor 12 connected to the shaft body 11, see Figure 2 as well as Figure 3 , Figure 3The present invention provides a schematic structural diagram of the shaft 10, the bearing 20 and the lubricating oil tank 30 in an embodiment of the present invention, wherein the sliding rotor 12 extends toward the low-level oil tank 50, and the sliding rotor 12 is spaced apart from the surface of the shaft body 11 to form an annular cavity 13. The lubricating oil tank 30 comprises an annular inner retaining wall 31, an annular outer retaining wall 32, and an annular bottom wall 33 connected between the annular inner retaining wall 31 and the annular outer retaining wall 32. The annular inner retaining wall 31 is located in the annular cavity 13, the annular outer retaining wall 32 is located on the side of the sliding rotor 12 facing away from the shaft body 11, and the annular bottom wall 33 is located on the side of the sliding rotor 12 adjacent to the low-level oil tank 50. That is, the annular inner retaining wall 31, the annular outer retaining wall and the annular bottom wall 33 of the lubricating oil tank 30 enclose an annular chamber. The sliding rotor 12 and the bearing 20 are located in the annular chamber, so that the lubricating oil tank 30 encloses the bearing 20 and collects the lubricating medium.

[0088] It is understandable that the lubricating oil tank 30 may further include an annular top wall 34 , which connects the annular inner retaining wall 31 and the upper portion of the annular outer retaining arm, so that the entire lubricating oil tank 30 forms a closed annular chamber.

[0089] The high-level oil tank 40 is used to supply the lubricating medium stored therein to the lubricating oil tank 30, so that the lubricating oil tank 30 can achieve spray lubrication. Figure 4 , Figure 4 A schematic diagram of the high-level oil tank 40 in an embodiment of the present application is shown. The high-level oil tank 40 has a first inlet 41 and a first outlet 42. The first inlet 41 is located on the side of the high-level oil tank 40 away from the low-level oil tank 50 or on the side of the high-level oil tank 40. The outlet of the circulating pump 60 is connected to the first inlet 41 of the high-level oil tank 40 through a pipeline, so that the lubricating medium enters from the top or side of the high-level oil tank 40; and the first outlet 42 is located on the side of the high-level oil tank 40 adjacent to the low-level oil tank 50. The first outlet 42 of the high-level oil tank 40 is connected to the lubricating oil tank 30 through a pipeline, so that the lubricating medium in the high-level oil tank 40 can be completely transported to the lubricating oil tank 30 for lubrication, so as to achieve continuous lubrication when the shaft 10 stops rotating when the system is abnormally shut down.

[0090] The low oil tank 50 is used to collect the lubricating medium returning from the lubricating oil tank 30 so as to continue to be delivered to the high oil tank 40. Figure 5 , Figure 5A schematic diagram of the low-level oil tank 50 in an embodiment of the present application is shown, wherein the low-level oil tank 50 has a second inlet 51 and a second outlet 52, the second inlet 51 is located on a side of the low-level oil tank 50 adjacent to the high-level oil tank 40, and the second inlet 51 of the low-level oil tank 50 is connected to the lubricating oil tank 30 through a pipeline, so that the lubricating medium in the lubricating oil tank 30 can flow back to the low-level oil tank 50 through the pipeline; and the second outlet 52 is located on the side of the low-level oil tank 50 away from the high-level oil tank 40, the inlet of the circulating pump 60 is connected to the second outlet 52 of the low-level oil tank 50 through a pipeline, so that the circulating pump 60 can suck the lubricating medium in the low-level oil tank 50. At the same time, since there is always a certain amount of lubricating medium in the low-level oil tank 50, the second outlet 52 is located at the bottom of the low-level oil tank 50 to avoid the circulation pump 60 from sucking in air.

[0091] The circulation pump 60 is used to pump the lubricating medium from the low-level oil tank 50 to the high-level oil tank 40 so that the lubricating medium can be circulated and lubricated. For example, the circulation pump 60 can be a vane pump or a reciprocating pump. During the operation of the circulation pump 60 of the present application, the liquid level of the lubricating medium in the high-level oil tank 40 and the low-level oil tank 50 is greater than the preset liquid level, and the liquid level of the lubricating medium in the lubricating oil tank 30 is close to or equal to 0, wherein the lubricating medium in the high-level oil tank 40 can be affected by gravity when the unit is abnormally shut down and can continue to lubricate the bearing 20 of the shaft 10 during the process of stopping rotation; and the lubricating medium in the low-level oil tank 50 can avoid the circulation pump 60 from being sucked out of the air; in addition, since the liquid level of the lubricating medium in the lubricating oil tank 30 is close to or equal to 0, the foam and oil mist generated in the lubricating oil tank 30 due to the rotation of the shaft 10 relative to the bearing 20 can be avoided.

[0092] The present application sets up a high-level oil tank 40 and a low-level oil tank 50 connected to the lubricating oil tank 30, and uses a circulating pump 60 to transfer the lubricating medium from the low-level oil tank 50 to the high-level oil tank 40. Since the horizontal height of the high-level oil tank 40 relative to the bearing 20 is higher than the horizontal height of the lubricating oil tank 30 relative to the bearing 20, and the horizontal height of the low-level oil tank 50 relative to the bearing 20 is lower than the horizontal height of the lubricating oil tank 30 relative to the bearing 20, the lubricating medium flows from the high-level oil tank 40 to the lubricating oil tank 30 for spray lubrication under the influence of gravity, and the lubricating medium in the lubricating oil tank 30 also flows to the low-level oil tank 50 under the influence of gravity. During the operation of the circulating pump 60, the liquid level of the lubricating medium in the high-level oil tank 40 and the low-level oil tank 50 is greater than the preset liquid level, and the liquid level of the lubricating medium in the lubricating oil tank 30 is close to or equal to 0, thereby achieving zero liquid level in the lubricating oil tank 30, thereby avoiding foam and oil mist generated in the lubricating oil tank 30 due to the rotation of the shaft 10 relative to the bearing 20.

[0093] In addition, since the liquid level of the lubricating medium in the lubricating oil tank 30 is close to or equal to 0, the height of the lubricating oil tank 30 can be reduced, thereby reducing the centerline distance between the bearing 20 and the shaft 10, ultimately achieving the purpose of shortening the length of the shaft 10 and increasing the critical speed of the shaft system.

[0094] It should be noted that the preset liquid levels corresponding to the high-level fuel tank 40 and the low-level fuel tank 50 can be the same, for example, the preset liquid levels corresponding to the high-level fuel tank 40 and the low-level fuel tank 50 are both 50 cm; the preset liquid levels corresponding to the high-level fuel tank 40 and the low-level fuel tank 50 can also be different, for example, the preset liquid level corresponding to the high-level fuel tank 40 is 80 cm, while the preset liquid levels corresponding to the low-level fuel tank 50 are both 50 cm.

[0095] In some embodiments of the present application, during the operation of the circulating pump 60, the high-level oil tank 40 is filled with lubricating medium. Since the high-level oil tank 40 is filled with lubricating medium, the lubricating medium pumped by the circulating pump 60 flows through the high-level oil tank 40 and then enters the lubricating oil tank 30. Therefore, the flow rate pumped by the circulating pump 60 is the flow rate of the lubricating medium entering the lubricating oil tank 30, thereby making the flow rate of the lubricating medium entering the lubricating oil tank 30 controllable, thereby improving the controllability of the bearing lubrication system.

[0096] In some embodiments of the present application, such as those in which the high-level oil tank 40 is filled with lubricating medium, the volume of the low-level oil tank 50 is greater than that of the high-level oil tank 40. Since, in the initial, unpowered state, the high-level oil tank 40 contains no lubricating medium, while only the low-level oil tank 50 contains lubricating medium, the volume of the low-level oil tank 50 is greater than that of the high-level oil tank 40. After the circulation pump 60 fills the high-level oil tank 40 with lubricating medium, the low-level oil tank 50 still contains a certain level of lubricating medium, thereby ensuring that the entire system can continue to circulate.

[0097] Furthermore, since the high-level oil tank 40 needs to be filled with lubricating medium so that the flow of lubricating medium into the lubricating oil tank 30 can be controlled by the circulating pump 60, and since the lubricating medium in the high-level oil tank 40 can play the role of shutdown lubrication protection during abnormal shutdown, the volume of the high-level oil tank 40 needs to be as large as possible to fully lubricate the bearings 20 during abnormal shutdown. This will result in a longer time for the high-level oil tank 40 to be filled with lubricating medium, thereby extending the startup time of large rotating equipment. In response to this phenomenon, the present invention further improves it. Please refer to the following content:

[0098] Continue reading Figure 6 , Figure 6 A structural schematic diagram of the bearing lubrication system in an embodiment of the present application is shown, wherein the high-level oil tank 40 includes a first high-level oil tank 410 and a second high-level oil tank 420. During the operation of the circulating pump 60, the first high-level oil tank 410 is filled with lubricating medium, and the volume of the second high-level oil tank 420 is greater than the volume of the lubricating medium therein.

[0099] It should be noted that, since the first high-level oil tank 410 is filled with lubricating medium, the circulating pump 60 can directly pump the lubricating medium into the first high-level oil tank 410, and the flow rate of the lubricating medium flowing out of the first high-level oil tank 410 is the flow rate pumped by the circulating pump 60, thereby making the flow rate of the lubricating medium entering the lubricating oil tank 30 controllable; and when an abnormal shutdown occurs suddenly, the bearing 20 can be lubricated in turn by the lubricating medium in the first high-level oil tank 410 and the second high-level oil tank 420, thereby ensuring that the entire system can continue to lubricate in the abnormal shutdown state. At the same time, since the lubricating medium in the abnormal shutdown state is provided by the first high-level oil tank 410 and the second high-level oil tank 420 respectively, the volume of the first high-level oil tank 410 can be reduced, thereby shortening the time for the first high-level oil tank 410 to be filled with lubricating medium, and ultimately achieving the purpose of shortening the startup time of large rotating equipment.

[0100] In some embodiments of the present application, the volume of the second high-level oil tank 420 is greater than that of the first high-level oil tank 410, thereby further reducing the volume of the first high-level oil tank 410 and further shortening the time it takes for the first high-level oil tank 410 to be filled with lubricating medium.

[0101] As an example, see Figure 6 The outlet of the circulating pump 60 is connected to the first high-level oil tank 410 through the first pipeline 430, and is connected to the second high-level oil tank 420 through the second pipeline 440. The first high-level oil tank 410 is connected to the lubricating oil tank 30 through the third pipeline 450, and the second high-level oil tank 420 is connected to the lubricating oil tank 30 through the fourth pipeline 460. That is to say, in the lubrication circuit composed of the high-level oil tank 40, the lubricating oil tank 30, the low-level oil tank 50, and the circulating pump 60 connected in sequence, the first high-level oil tank 410 and the second high-level oil tank 420 are connected in parallel in the lubrication circuit. At the same time, a first valve 470 is provided on the second pipeline 440, and a second valve 480 is provided on the fourth pipeline 460. During the operation of the circulating pump 60, the first valve 470 and the second valve 480 are normally closed. By closing the first valve 470 and the second valve 480, only the first high-level oil tank 410 can be used under normal working conditions. In the abnormal shutdown state, the second valve 480 can be opened, and the bearing 20 can be lubricated by the lubricating medium in the first high-level oil tank 410 and the second high-level oil tank 420 at the same time. When the lubricating medium in the second high-level oil tank 420 needs to be replenished, the first valve 470 can be opened to transport the lubricating medium to the second high-level oil tank 420 through the circulating pump 60.

[0102] It is understandable that valves can also be set on other pipelines of the bearing lubrication system, for example, a valve can be set on the pipeline between the first high-level oil tank 410 and the lubricating oil tank 30; for example, a valve can be set on the pipeline between the low-level oil tank 50 and the lubricating oil tank 30.

[0103] In some embodiments of the present application, see Figure 1 The bearing lubrication system further includes a cooler 70, which can reduce the temperature of the lubricating medium flowing out of the lubricating oil tank 30. For example, the cooler 70 can be a tubular heat exchanger, a plate heat exchanger, etc. In some embodiments of the present application, the cooler 70 can be disposed between the circulating pump 60 and the low-level oil tank 50. In other embodiments of the present application, the cooler 70 can be disposed between the circulating pump 60 and the high-level oil tank 40.

[0104] It is understandable that a cooler 70 may be provided between the high-level oil tank 40 and the lubricating oil tank 30 ; or, a cooler 70 may be provided between the lubricating oil tank 30 and the low-level oil tank 50 .

[0105] In some embodiments of the present application, for example, for an embodiment in which the bearing 20 includes a plurality of guide bearing pads 21, see Figure 7 , Figure 7 A schematic diagram of the arrangement of the first oil supply pipe 22 in an embodiment of the present application is shown. When multiple guide bearing bushes 21 are arranged in a ring array at intervals, a first oil supply pipe 22 is provided between adjacent guide bearing bushes 21. The lubricating medium of the first oil supply pipe 22 comes from the high-level oil tank 40, and provides lubricating medium to the guide bearing bushes 21, realizing spray oil supply between the bushes, thereby ensuring the lubrication effect of the guide bearing bushes 21.

[0106] In some embodiments of the present application, for example, for an embodiment in which the bearing 20 includes a plurality of thrust bearing pads 23, see Figure 8 , Figure 8 A schematic diagram of the arrangement of the second oil supply pipe 24 in an embodiment of the present application is shown, wherein, when multiple thrust bearing pads 23 are arranged in a ring array at intervals, a second oil supply pipe 24 is provided between adjacent thrust bearing pads 23. The lubricating medium of the second oil supply pipe 24 comes from the high-level oil tank 40, and provides the lubricating medium to the thrust bearing pads 23, realizing spray oil supply between the pads, and ensuring the lubrication effect of the thrust bearing pads 23.

[0107] It is understandable that in some embodiments of the present application, for example, in an embodiment in which the bearing 20 includes a plurality of guide bearing bushes 21 and a plurality of thrust bearing bushes 23, a first oil supply pipe 22 and a second oil supply pipe 24 may also be provided at the same time, for example, see Figure 9 , Figure 9A schematic diagram of the arrangement of the first oil supply pipe 22 and the second oil supply pipe 24 in an embodiment of the present application is shown. The first oil supply pipe 22 is set at the adjacent guide bearing shell 21, and the second oil supply pipe 24 is set at the adjacent thrust bearing shell 23 to lubricate the guide bearing shell 21 and the thrust bearing shell 23 at the same time.

[0108] In some embodiments of the present application, see Figure 10 , Figure 10 Another structural schematic diagram of the bearing lubrication system in an embodiment of the present application is shown, wherein the bearing 20 includes a first bearing 210 and a second bearing 220, the first bearing 210 cooperates with one end of the shaft 10, and the second bearing 220 cooperates with the other end of the shaft 10, thereby limiting the radial movement and axial movement of the shaft 10 from both ends.

[0109] In some embodiments of the present application, the first bearing 210 may be an upper guide bearing, and the second bearing 220 may be composed of a thrust bearing and a lower guide bearing. Figure 10 The first bearing 210 at the upper end of the shaft 10 is an upper guide bearing, and the second bearing 220 at the lower end of the shaft 10 is composed of a lower guide bearing and a thrust bearing.

[0110] In some embodiments of the present application, the first bearing 210 may be composed of a thrust bearing and an upper guide bearing, and the second bearing 220 may be a lower guide bearing. Figure 11 , Figure 11 Another structural schematic diagram of the bearing lubrication system in an embodiment of the present application is shown, wherein the first bearing 210 at the upper end of the shaft 10 is composed of a thrust bearing and an upper guide bearing, and the second bearing 220 at the lower end of the shaft 10 is a lower guide bearing.

[0111] In some embodiments of this application, see Figure 10 as well as Figure 11 For example, for the embodiment in which the above-mentioned bearing 20 includes a first bearing 210 and a second bearing 220, the lubricating oil tank 30 includes a first lubricating oil tank 310 enclosing the first bearing 210 and a second lubricating oil tank 320 enclosing the second bearing 220, so as to collect the lubricating medium flowing through the first bearing 210 and the lubricating medium flowing through the second bearing 220 respectively.

[0112] In some embodiments of the present application, for example, in the embodiment where the lubricating oil tank 30 includes a first lubricating oil tank 310 and a second lubricating oil tank 320, the first lubricating oil tank 310 and the second lubricating oil tank 320 can be connected to the high-position oil tank 40 and the low-position oil tank 50 to form a parallel structure, so as to lubricate the first bearing 210 and the second bearing 220 at the same time. Figure 10 as well as Figure 11In the circulation loop, the high-level oil tank 40 and the low-level oil tank 50 are connected to the first lubricating oil tank 310, and the high-level oil tank 40 and the low-level oil tank 50 are connected to the second lubricating oil tank 320, that is, the first lubricating oil tank 310 and the second lubricating oil tank 320 form a parallel lubricating medium flow route.

[0113] It is understandable that the high-level oil tank 40 can only supply oil to the first lubricating oil tank 310, for example, see Figure 12 , Figure 12 Another structural diagram of the bearing lubrication system in an embodiment of the present application is shown. The first lubricating oil tank 310 is connected to the high-level oil tank 40 through a pipeline, and the first lubricating oil tank 310 is connected to the low-level oil tank 50 through a pipeline; alternatively, the high-level oil tank 40 can only supply oil to the second lubricating oil tank 320, for example, see Figure 13 , Figure 13 Another structural schematic diagram of the bearing lubrication system in an embodiment of the present application is shown, in which the second lubricating oil tank 320 is connected to the high-level oil tank 40 through a pipeline, and the second lubricating oil tank 320 is connected to the low-level oil tank 50 through a pipeline.

[0114] In some embodiments of the present application, for example, for an embodiment in which the above-mentioned lubricating oil tank 30 includes a first lubricating oil tank 310 and a second lubricating oil tank 320, the first lubricating oil tank 310 is connected to the high-level oil tank 40 through a pipeline, and the second lubricating oil tank 320 is connected to the first lubricating oil tank 310 through a pipeline; the first lubricating oil tank 310 is connected to the low-level oil tank 50 through a pipeline; and / or the second lubricating oil tank 320 is connected to the low-level oil tank 50 through a pipeline, that is, the first lubricating oil tank 310 and the second lubricating oil tank 320 are connected in series in sequence to form a single lubricating medium circulation loop.

[0115] It is worth noting that the above content about the bearing lubrication system is intended to clearly illustrate the verification process of the embodiment of the present application. Under the guidance of this application, those skilled in the art can make equivalent modified designs, for example, refer to Figure 14 , Figure 14 FIG1 shows another structural diagram of the bearing lubrication system in the embodiment of the present application, wherein the high-position oil tank 40 only lubricates the upper guide bearing at the upper end of the shaft 10 and the lower guide bearing at the bottom; for example, see FIG1 Figure 15 , Figure 15 Another structural diagram of the bearing lubrication system in the embodiment of the present application is shown, wherein the high-position oil tank 40 lubricates the upper guide bearing and the thrust bearing at the upper end of the shaft 10 at the same time; for another example, see Figure 16 , Figure 16 Another structural schematic diagram of the bearing lubrication system in an embodiment of the present application is shown, wherein the high-position oil tank 40 lubricates the upper guide bearing at the upper end of the shaft 10 at the same time.

[0116] Furthermore, to better implement the bearing lubrication system in the embodiments of the present application, based on the bearing lubrication system, the present application provides a rotating device, which includes the bearing lubrication system described in any of the above embodiments. For example, the rotating device may be a generator motor, a water pump turbine, a wind turbine, or the like. Because the rotating device in the embodiments of the present application includes the bearing lubrication system in the above embodiments, it possesses all the beneficial effects of the bearing lubrication system in the above embodiments, and no further details are given here.

[0117] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, please refer to the detailed description of other embodiments above and will not be repeated here.

[0118] The basic concepts have been described above. It will be apparent to those skilled in the art that the detailed disclosure above is merely illustrative and does not limit the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and amendments to the present application. Such modifications, improvements, and amendments are suggested in the present application and remain within the spirit and scope of the exemplary embodiments of the present application.

[0119] At the same time, this application uses specific terms to describe the embodiments of this application. For example, "one embodiment," "an embodiment," and / or "some embodiments" refer to a certain feature, structure, or characteristic related to at least one embodiment of this application. Therefore, it should be emphasized and noted that "one embodiment," "an embodiment," or "an alternative embodiment" mentioned twice or multiple times in different locations in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this application may be appropriately combined.

[0120] Similarly, it should be noted that, in order to simplify the presentation of this application and thus facilitate understanding of one or more embodiments of the invention, the foregoing descriptions of the embodiments of this application sometimes combine multiple features into a single embodiment, figure, or description thereof. However, this disclosure method does not mean that the subject matter of this application requires more features than those recited in the claims. In fact, an embodiment may have fewer features than all of the features of a single embodiment disclosed above.

[0121] In some embodiments, numbers are used to describe the quantity of components and attributes. It should be understood that such numbers used in the description of the embodiments are modified by the modifiers "about", "approximately" or "substantially" in some examples. Unless otherwise stated, "about", "approximately" or "substantially" indicate that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the description and claims are approximate values, which may change according to the required features of individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and adopt the general method of retaining digits. Although the numerical domains and parameters used to confirm the breadth of their range in some embodiments of the present application are approximate values, in specific embodiments, the settings of such numerical values ​​are as accurate as possible within the feasible range.

[0122] Each patent, patent application, patent application publication, and other materials, such as articles, books, specifications, publications, and documents, cited in this application is hereby incorporated by reference in its entirety, except for any application history that is inconsistent with or conflicts with this application, and excluding any document (currently or subsequently appended to this application) that limits the broadest scope of the claims of this application. It should be noted that if the descriptions, definitions, and / or terminology used in the accompanying materials are inconsistent with or conflict with the content of this application, the descriptions, definitions, and / or terminology used in this application will control.

[0123] The above is a detailed introduction to a bearing lubrication system and a rotating device provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A bearing lubrication system, characterized in that: include: axis; a bearing, the bearing being engaged with the shaft, the bearing comprising a plurality of guide bearing pads and / or a plurality of thrust bearing pads; a lubricating oil tank, the lubricating oil tank enclosing the bearing; A high-position oil tank, wherein the height of the high-position oil tank relative to the bearing is higher than the height of the lubricating oil tank relative to the bearing; a low-position oil tank, wherein the horizontal height of the low-position oil tank relative to the bearing is lower than the horizontal height of the lubricating oil tank relative to the bearing; a circulating pump, wherein the inlet of the circulating pump is connected to the low-level oil tank through a pipeline, and the outlet of the circulating pump is connected to the high-level oil tank through a pipeline; Wherein, the high-position oil tank is connected to the lubricating oil tank via a pipeline, the lubricating oil tank is connected to the low-position oil tank via a pipeline, a first oil supply pipe is provided between adjacent guide bearing bushes, and / or a second oil supply pipe is provided between adjacent thrust bearing bushes; During the operation of the circulating pump, the liquid level of the lubricating medium in the low-level oil tank is greater than the preset liquid level, and the liquid level of the lubricating medium in the lubricating oil tank is close to or equal to 0, so as to achieve the zero liquid level of the lubricating oil tank. The high-level oil tank is filled with lubricating medium, and the lubricating medium of the first oil supply pipe and / or the second oil supply pipe comes from the high-level oil tank, so as to achieve spray oil supply between the tiles.

2. The bearing lubrication system according to claim 1, characterized in that: The volume of the low-position oil tank is greater than that of the high-position oil tank.

3. The bearing lubrication system according to claim 1, characterized in that: The high-level oil tank has a first inlet and a first outlet; The first inlet is located on a side of the high-position fuel tank facing away from the low-position fuel tank, and the first outlet is located on a side of the high-position fuel tank adjacent to the low-position fuel tank; The outlet of the circulation pump is connected to the first inlet through a pipeline, and the first outlet is connected to the lubricating oil tank through a pipeline.

4. The bearing lubrication system according to claim 3, characterized in that: The low-level oil tank has a second inlet and a second outlet; The second inlet is located on a side of the low-level fuel tank adjacent to the high-level fuel tank, and the second outlet is located on a side of the low-level fuel tank away from the high-level fuel tank; The inlet of the circulation pump is connected to the second outlet through a pipeline, and the second inlet is connected to the lubricating oil tank through a pipeline.

5. The bearing lubrication system according to claim 1, wherein: The high-level fuel tank includes a first high-level fuel tank and a second high-level fuel tank; During the operation of the circulating pump, the first high-level oil tank is filled with lubricating medium, and the volume of the second high-level oil tank is greater than the volume of the lubricating medium therein.

6. The bearing lubrication system according to claim 5, characterized in that: The volume of the second high-level oil tank is greater than that of the first high-level oil tank.

7. The bearing lubrication system according to claim 5, characterized in that: The outlet of the circulation pump is connected to the first high-level oil tank through a first pipeline, and is connected to the second high-level oil tank through a second pipeline; The first high-position oil tank is connected to the lubricating oil tank via a third pipeline, and the second high-position oil tank is connected to the lubricating oil tank via a fourth pipeline; The second pipeline is provided with a first valve, and the fourth pipeline is provided with a second valve. During the operation of the circulation pump, the first valve and the second valve are in a normally closed state.

8. The bearing lubrication system according to claim 1, wherein: Also includes a cooler; The cooler is arranged between the circulating pump and the low-level oil tank; or The cooler is arranged between the circulation pump and the high-level oil tank.

9. The bearing lubrication system according to claim 1, wherein: The shaft includes a shaft body and a sliding rotor connected to the shaft body; The plurality of guide bearing pads are arranged in an annular array at intervals and in contact with the surface of the sliding rotor facing away from the shaft body; and / or The plurality of thrust bearing pads are arranged in an annular array at intervals and are in contact with a surface of the sliding rotor facing the low-position oil tank.

10. The bearing lubrication system according to claim 9, wherein: The lubricating oil tank has an annular inner retaining wall, an annular outer retaining wall, and an annular bottom wall connected between the annular inner retaining wall and the annular outer retaining wall; The sliding rotor extends toward the low-position oil tank, and the sliding rotor is spaced apart from the surface of the shaft body to form an annular cavity; The annular inner retaining wall is located at the annular cavity, the annular outer retaining wall is located at a side of the sliding rotor away from the shaft body, and the annular bottom wall is located at a side of the sliding rotor adjacent to the low-position oil tank.

11. The bearing lubrication system according to claim 1, wherein: The bearing includes a first bearing and a second bearing, the first bearing is matched with one end of the shaft, and the second bearing is matched with the other end of the shaft; The lubricating oil tank includes a first lubricating oil tank enclosing the first bearing and a second lubricating oil tank enclosing the second bearing.

12. The bearing lubrication system according to claim 11, wherein: The first lubricating oil tank is connected to the high-position oil tank via a pipeline, and the first lubricating oil tank is connected to the low-position oil tank via a pipeline; and / or The second lubricating oil tank is connected to the high-position oil tank through a pipeline, and the second lubricating oil tank is connected to the low-position oil tank through a pipeline.

13. The bearing lubrication system according to claim 11, wherein: The first lubricating oil tank is connected to the high-position oil tank via a pipeline, and the second lubricating oil tank is connected to the first lubricating oil tank via a pipeline; The first lubricating oil tank is connected to the low-level oil tank via a pipeline; and / or The second lubricating oil tank is connected to the low-level oil tank through a pipeline.

14. A rotating device, characterized in that: Comprising the bearing lubrication system according to any one of claims 1 to 13.

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