Thrust bearing oil mist treatment system and generator unit

Abstract

The invention discloses a thrust bearing oil mist treatment system and a generator unit, the thrust bearing oil mist treatment system is used for the generator unit, the generator unit comprises a large shaft, an oil basin and a lower rack, the large shaft is vertically arranged, the oil basin is circumferentially arranged around the large shaft and located at the position close to the upper portion of the large shaft, and the lower portion of the large shaft is arranged in the lower rack in a penetrating mode; the thrust bearing oil mist treatment system comprises the sealing assembly, the sealing assembly is arranged between the large shaft and the lower rack, the space between the large shaft and the lower rack can be sealed through the sealing assembly, and when oil in the oil basin overflows, the sealing assembly can prevent the oil from leaking out of the space between the large shaft and the lower rack; the problem that the large shaft is damaged due to insufficient supply of the lubricating liquid is avoided, lubrication of the large shaft is guaranteed, and the operation stability of a generator unit is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of generator sets, and particularly to an oil mist treatment system for a thrust bearing and a generator set. Background Art

[0002] In a power system, the large shaft of a generator set is vertically arranged, an oil sump is arranged circumferentially around the large shaft and is located at a position close to the upper part of the large shaft, and the lower part of the large shaft penetrates through a lower frame. When the oil in the oil sump overflows, it is likely to leak out from between the large shaft and the lower frame. Summary of the Invention

[0003] The purpose of the present invention is to provide an oil mist treatment system for a thrust bearing and a generator set, aiming to solve the technical problem of liquid leakage in existing generator sets.

[0004] To solve the above problems, according to one aspect of the present application, an embodiment of the present invention provides an oil mist treatment system for a thrust bearing, which is used for a generator set. The generator set includes a large shaft, an oil sump, and a lower frame. The large shaft is vertically arranged, the oil sump is arranged circumferentially around the large shaft and is located at a position close to the upper part of the large shaft, and the lower part of the large shaft penetrates through the lower frame. The oil mist treatment system for the thrust bearing includes a sealing assembly, and the sealing assembly is arranged between the large shaft and the lower frame to seal the space between the large shaft and the lower frame.

[0005] In some embodiments, the sealing assembly includes an annular partition plate. The large shaft penetrates through the inner hole of the annular partition plate, and the annular partition plate is attached to the lower part of the lower frame to block the space between the large shaft and the lower frame.

[0006] In some embodiments, the sealing assembly further includes a sealing sleeve. The sealing sleeve is sleeved on the large shaft and is attached to a side of the annular partition plate away from the oil sump.

[0007] In some embodiments, the oil mist treatment system for the thrust bearing further includes a liquid extraction pipe. The liquid inlet of the liquid extraction pipe is arranged on the sealing sleeve and is communicated with a side of the sealing sleeve facing the annular partition plate. The liquid outlet of the liquid extraction pipe is connected to an oil absorption atomizer outside the foundation pit.

[0008] In some embodiments, the generator set further includes a rotor and a wind baffle. The oil mist treatment system for the thrust bearing further includes an air seal ring groove and a gas guide pipe. The air seal ring groove is circumferentially formed on the inner hole wall of the sealing sleeve. One end of the gas guide pipe is connected to the air seal ring groove, and the other end is arranged on the wind baffle. When the rotor rotates, wind pressure can be generated to enable air flow to enter the air seal ring groove through the gas guide pipe.

[0009] In some embodiments, a sealing ring is provided on a side of the sealing sleeve away from the annular partition plate. The sealing ring is sleeved on the large shaft, and a plurality of annular grooves are formed in an inner hole wall of the sealing ring at intervals to form a labyrinth sealing structure.

[0010] In some embodiments, the thrust bearing oil mist treatment system further includes a liquid collecting ring groove which is circumferentially formed on an inner hole wall of the sealing sleeve and is located on a side of the air sealing ring groove facing the oil sump. An inlet of the liquid extraction pipe is connected to the liquid collecting ring groove.

[0011] In some embodiments, the generator unit further includes an oil suction and atomization pipeline with one end connected to the oil sump. The other end of the oil suction and atomization pipeline is connected to an oil suction and atomization machine outside the foundation pit. The height of the oil suction and atomization pipeline in the oil sump is not higher than the overflow liquid level line. An outlet of the liquid extraction pipe is connected to the oil suction and atomization pipeline of the oil sump.

[0012] In some embodiments, both the annular partition plate and the sealing sleeve are assembled by multi-lobe structures; and / or, an air supplement device is provided on the oil suction and atomization pipeline or the liquid extraction pipe. The air supplement device has an intake valve, and the air supplement device can adjust an opening degree of the intake valve according to an internal and external pressure difference.

[0013] According to one aspect of the present application, the present invention also discloses a generator unit, which includes a large shaft, an oil sump, a lower frame and the thrust bearing oil mist treatment system as described above.

[0014] Compared with the prior art, the thrust bearing oil mist treatment system of the present invention has at least the following beneficial effects:

[0015] An embodiment of the present invention discloses a thrust bearing oil mist treatment system and a generator unit. The thrust bearing oil mist treatment system is used for a generator unit. The generator unit includes a large shaft, an oil sump and a lower frame. The large shaft is vertically arranged. The oil sump is circumferentially arranged around the large shaft and is located at a position close to the upper part of the large shaft. The lower part of the large shaft penetrates through the lower frame. The thrust bearing oil mist treatment system of the present invention includes a sealing assembly. The sealing assembly is arranged between the large shaft and the lower frame. The space between the large shaft and the lower frame can be sealed through the sealing assembly. When the oil in the oil sump overflows, the sealing assembly can prevent the oil from leaking out between the large shaft and the lower frame, avoiding the problem of insufficient lubricating liquid supply and causing damage to the large shaft, ensuring the lubrication of the large shaft and improving the operation stability of the generator unit.

[0016] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly and implement it according to the content of the specification, the following describes in detail with reference to the preferred embodiments of the present invention and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic structural diagram of the thrust bearing oil mist treatment system provided by the embodiments of the present invention;

[0019] Figure 2 For Figure 1 the partial enlargement at the annular partition plate and the sealing sleeve in

[0020] Figure 3 For Figure 1 the P-direction view of the oil absorption atomizer in

[0021] 1. Large shaft;

[0022] 2. Oil sump;

[0023] 3. Lower machine frame;

[0024] 4. Annular partition plate;

[0025] 5. Sealing sleeve; 51. Gas sealing ring groove; 52. Liquid collecting ring groove;

[0026] 6. Liquid extraction pipe;

[0027] 7. Oil absorption atomizer;

[0028] 8. Windshield;

[0029] 9. Sealing ring; 91. Annular groove;

[0030] 10. Oil absorption atomization pipeline;

[0031] 11. Air supplement device; 111. Intake valve;

[0032] 12. Air guide pipeline. Detailed implementation manners

[0033] To further elaborate on the technical means and effects adopted by the present invention to achieve the intended invention purpose, the following will, in combination with the accompanying drawings and preferred embodiments, detail the specific implementation manners, structures, features, and their effects of the present invention application. In the following description, different "one embodiment" or "embodiment" do not necessarily refer to the same embodiment. In addition, the specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0034] In the description of the present invention, it should be clear that the terms "first", "second", etc. in the specification, claims and the above-mentioned drawings of the present invention are used to distinguish similar objects, and do not necessarily describe a specific order or sequence; the terms "vertical", "lateral", "longitudinal", "front", "rear", "left", "right", "upper", "lower", "horizontal", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention, rather than meaning that the indicated device or element must have a specific orientation or position, so it cannot be construed as a limitation to the present invention.

[0035] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Embodiment 1

[0037] As Figures 1 - 3 shown, the embodiment of the present invention provides a thrust bearing oil mist treatment system for a generator set. The generator set includes a large shaft 1, an oil sump 2 and a lower frame 3. The large shaft 1 is arranged vertically. The oil sump 2 is arranged circumferentially around the large shaft 1 and is located at a position close to the upper part of the large shaft 1. The lower part of the large shaft 1 passes through the lower frame 3. The thrust bearing oil mist treatment system includes a sealing assembly. The sealing assembly is arranged between the outer wall of the large shaft 1 and the inner hole of the lower frame 3 to seal the space between the large shaft 1 and the lower frame 3.

[0038] In this embodiment, the thrust bearing oil mist treatment system is used for a generator set. The generator set includes a large shaft 1, an oil sump 2 and a lower frame 3. The large shaft 1 is arranged vertically. The oil sump 2 is arranged circumferentially around the large shaft 1 and is located at a position close to the upper part of the large shaft 1. The lower part of the large shaft 1 passes through the lower frame 3. In this embodiment, the thrust bearing oil mist treatment system includes a sealing assembly. A sealing assembly is arranged between the outer wall of the large shaft 1 and the inner hole of the lower frame 3. Through the sealing assembly, the space between the large shaft 1 and the lower frame 3 can be sealed. When the oil in the oil sump 2 overflows, the sealing assembly can prevent the oil from leaking out between the large shaft 1 and the lower frame 3, avoiding the problem of insufficient lubricating fluid supply and resulting in damage to the large shaft 1, ensuring the lubrication of the large shaft 1 and improving the operating stability of the generator set.

[0039] In some embodiments, the sealing assembly includes an annular partition plate 4, the large shaft 1 passes through the inner hole of the annular partition plate 4, and the annular partition plate 4 is fitted and arranged below the lower frame 3 to block the space between the large shaft 1 and the lower frame 3.

[0040] In this embodiment, the sealing assembly includes an annular partition plate 4. During assembly, the large shaft 1 is passed through the inner hole of the annular partition plate 4, and the annular partition plate 4 is fitted and arranged on the lower surface of the lower frame 3. The space between the large shaft 1 and the lower frame 3 can be blocked by the annular partition plate 4. When the oil in the oil sump 2 overflows, the annular partition plate 4 prevents the oil from leaking out between the large shaft 1 and the lower frame 3, avoiding the problem of insufficient lubricating fluid supply leading to damage of the large shaft 1, ensuring the lubrication of the large shaft 1, and improving the stability of the operation of the generator set.

[0041] In some embodiments, the sealing assembly further includes a sealing sleeve 5. The sealing sleeve 5 is sleeved on the large shaft 1 and is fitted and arranged on the side of the annular partition plate 4 away from the oil sump 2.

[0042] In this embodiment, by fitting and arranging the sealing sleeve 5 on the side of the annular partition plate 4 away from the oil sump 2 and sleeving the annular partition plate 4 on the large shaft 1, the oil leakage between the annular partition plate 4 and the large shaft 1 is further prevented. Therefore, when the oil in the oil sump 2 overflows, it can more effectively prevent the oil from leaking out between the large shaft 1 and the lower frame 3, avoiding the problem of insufficient lubricating fluid supply leading to damage of the large shaft 1, ensuring the lubrication of the large shaft 1, and improving the stability of the operation of the generator set.

[0043] In some embodiments, the thrust bearing oil mist treatment system further includes a liquid extraction pipe 6. The liquid inlet of the liquid extraction pipe 6 is arranged on the sealing sleeve 5 and is communicated with the side of the sealing sleeve 5 facing the annular partition plate 4. The liquid outlet of the liquid extraction pipe 6 is connected to the liquid extraction pipe 6 of the oil absorption atomizer 7 outside the foundation pit.

[0044] In this embodiment, by adding a liquid extraction pipe 6 between the sealing sleeve 5 and the oil absorption atomizer 7. Specifically, the liquid inlet of the liquid extraction pipe 6 is arranged on the sealing sleeve 5, and the liquid inlet of the liquid extraction pipe 6 is communicated with the side of the sealing sleeve 5 facing the annular partition plate 4. The liquid outlet of the liquid extraction pipe 6 is connected to the oil absorption atomizer 7 outside the foundation pit. The oil liquid on the side of the sealing sleeve 5 facing the annular partition plate 4 is sucked into the oil absorption atomizer 7 through the liquid extraction pipe 6, avoiding the accumulation of the oil liquid on the side of the sealing sleeve 5 facing the annular partition plate 4. Even if there is a small amount of liquid leakage, it can be timely sucked into the oil absorption atomizer 7, reducing the risk of liquid leakage.

[0045] In some embodiments, the generator unit further includes a rotor and a wind deflector 8, and the thrust bearing oil mist treatment system further includes a gas seal ring groove 51 and a gas guide pipe 12. The gas seal ring groove 51 is circumferentially formed on the inner hole wall of the seal sleeve 5. One end of the gas guide pipe 12 is connected to the gas seal ring groove 51, and the other end is disposed on the wind deflector 8. When the rotor rotates, it can generate wind pressure so that the air flow enters the gas seal ring groove 51 through the gas guide pipe 12.

[0046] In this embodiment, the thrust bearing oil mist treatment system further includes a gas seal ring groove 51 and a gas guide pipe 12. Specifically, the gas seal ring groove 51 is circumferentially formed on the inner hole wall of the seal sleeve 5. One end of the gas guide pipe 12 is connected to the gas seal ring groove 51, and the other end of the gas guide pipe 12 is disposed on the wind deflector 8. When the rotor rotates, it can generate wind pressure, and this wind pressure can make the air flow enter the gas seal ring groove 51 through the gas guide pipe 12, which can block the downward overflow of the oil mist and play a gas sealing role.

[0047] In some embodiments, a seal ring 9 is provided on the side of the seal sleeve 5 away from the annular partition plate 4. The seal ring 9 is sleeved on the large shaft 1, and a plurality of annular grooves 91 are formed on the inner hole wall of the seal ring 9 at intervals to form a labyrinth seal structure.

[0048] In this embodiment, by providing a seal ring 9 on the side of the seal sleeve 5 away from the annular partition plate 4, sleeving the seal ring 9 on the large shaft 1, and forming a plurality of annular grooves 91 on the inner hole wall of the seal ring 9 at intervals to form a labyrinth seal structure, air leakage and liquid leakage between the seal sleeve 5 and the large shaft 1 can be prevented.

[0049] In some embodiments, the thrust bearing oil mist treatment system further includes a liquid collection ring groove 52. The liquid collection ring groove 52 is circumferentially formed on the inner hole wall of the seal sleeve 5 and is located on the side of the gas seal ring groove 51 facing the oil sump 2. The liquid inlet of the liquid extraction pipe 6 is connected to the liquid collection ring groove 52.

[0050] In this embodiment, by circumferentially forming a liquid collection ring groove 52 on the inner hole wall of the seal sleeve 5, since it is located on the side of the gas seal ring groove 51 facing the oil sump 2 and the liquid inlet of the liquid extraction pipe 6 is connected to the liquid collection ring groove 52, the oil mist leaked between the annular partition plate 4 and the large shaft 1 can be collected in the liquid collection ring groove 52 and then timely pumped out into the oil absorption atomizer 7 through the liquid extraction pipe 6 to reduce the risk of liquid leakage.

[0051] In some embodiments, the generator unit further includes an oil suction and atomization pipeline 10 with one end connected to the oil sump 2, and the other end of the oil suction and atomization pipeline 10 is connected to an oil suction and atomization machine 7 outside the foundation pit. The height of the oil suction and atomization pipeline 10 in the oil sump 2 is not higher than the overflow liquid level line, and the liquid outlet of the liquid extraction pipe 6 is connected to the oil suction and atomization pipeline of the oil sump 2.

[0052] The generator unit of this embodiment further includes an oil suction and atomization pipeline 10 with one end connected to the oil sump 2, and the other end of the oil suction and atomization pipeline 10 is connected to an oil suction and atomization machine 7 outside the foundation pit. The height of the oil suction and atomization pipeline 10 in the oil sump 2 is not higher than the overflow liquid level line, and the liquid outlet of the liquid extraction pipe 6 is connected to the oil suction and atomization pipeline 10, using part of the oil suction and atomization pipeline 10 to reduce costs.

[0053] In some embodiments, both the annular partition 4 and the sealing sleeve 5 are assembled from multi-lobe structures. The annular partition 4 and the sealing sleeve 5 being assembled from multi-lobe structures reduces the difficulty of manufacturing large parts and reduces costs.

[0054] In some embodiments, an air supplement device 11 is provided on the oil suction and atomization pipeline 10 or the liquid extraction pipe 6. The air supplement device 11 has an intake valve 111, and the air supplement device 11 can adjust the opening degree of the intake valve 111 according to the internal and external pressure difference. In this embodiment, the air supplement device 11 can adjust the opening degree of the intake valve 111 according to the pressure difference between the inside of the oil suction and atomization pipeline 10 or the liquid extraction pipe 6 and the external atmospheric pressure, thereby adjusting the intake air flow rate of the main channel.

[0055] Embodiment 2

[0056] The embodiment of the present invention also provides a generator unit, which includes a large shaft 1, an oil sump 2, a lower frame 3, and the thrust bearing oil mist treatment system as described above.

[0057] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the above-described devices, apparatuses, and units can refer to the corresponding processes in the foregoing method embodiments, and will not be elaborated herein.

[0058] The above is only the specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of various equivalent modifications or substitutions within the technical scope disclosed by the present invention, and these modifications or substitutions should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A thrust bearing oil mist treatment system, used for a generator set, the generator set comprising a main shaft (1), an oil pan (2) and a lower frame (3), the main shaft (1) being arranged vertically, the oil pan (2) being arranged circumferentially around the main shaft (1) and being located near the upper part of the main shaft (1), the lower part of the main shaft (1) being passed through the lower frame (3), characterized in that: The thrust bearing oil mist treatment system comprises a sealing component, wherein the sealing component is arranged between the outer wall of the main shaft (1) and the lower bottom surface of the lower frame (3) to seal the space between the main shaft (1) and the lower frame (3).

2. The thrust bearing oil mist treatment system according to claim 1, characterized in that: The sealing assembly comprises an annular partition (4), the main shaft (1) is inserted into an inner hole of the annular partition (4), and the annular partition (4) is arranged in a close fit below the lower frame (3) to seal the space between the main shaft (1) and the lower frame (3).

3. The thrust bearing oil mist treatment system according to claim 2, characterized in that: The sealing assembly further comprises a sealing sleeve (5), wherein the sealing sleeve (5) is sleeved on the main shaft (1) and is arranged in close contact with a side of the annular partition (4) away from the oil pan (2).

4. The thrust bearing oil mist treatment system according to claim 3, characterized in that: The thrust bearing oil mist treatment system further comprises a liquid extraction pipe (6), wherein a liquid inlet of the liquid extraction pipe (6) is arranged on the sealing sleeve (5) and is connected to a side of the sealing sleeve (5) facing the annular partition plate (4), and a liquid outlet of the liquid extraction pipe (6) is connected to an oil suction atomizer (7) outside the foundation pit.

5. The thrust bearing oil mist treatment system according to claim 4, characterized in that: The generator set further comprises a rotor and a windshield (8), and the thrust bearing oil mist treatment system further comprises an air seal ring groove (51) and an air guide duct (12), wherein the air seal ring groove (51) is circumferentially arranged on the inner hole wall of the sealing sleeve (5), one end of the air guide duct (12) is connected to the air seal ring groove (51), and the other end is arranged on the windshield (8), and wind pressure can be generated when the rotor rotates, so that the airflow enters the air seal ring groove (51) through the air guide duct (12).

6. The thrust bearing oil mist treatment system according to claim 5, characterized in that: A sealing ring (9) is provided on the side of the sealing sleeve (5) away from the annular partition (4), the sealing ring (9) being sleeved on the main shaft (1), and the inner hole wall of the sealing ring (9) is configured with a plurality of annular grooves (91) arranged at intervals to form a labyrinth sealing structure.

7. The thrust bearing oil mist treatment system according to claim 5, characterized in that: The thrust bearing oil mist treatment system further comprises a liquid collecting annular groove (52), the liquid collecting annular groove (52) being circumferentially arranged on the inner hole wall of the sealing sleeve (5) and being located on a side of the air sealing annular groove (51) facing the oil basin (2), and the liquid inlet of the liquid extraction pipe (6) being connected to the liquid collecting annular groove (52).

8. The thrust bearing oil mist treatment system according to claim 4, characterized in that: The generator set further comprises an oil suction atomization pipeline (10) having one end connected to the oil pan (2), the other end of the oil suction atomization pipeline (10) being connected to an oil suction atomization machine (7) outside the foundation pit, the height of the oil suction atomization pipeline (10) in the oil pan (2) being no higher than an overflow liquid level line, and the liquid outlet of the liquid extraction pipe (6) being connected to the oil suction atomization pipeline of the oil pan (2).

9. The thrust bearing oil mist treatment system according to claim 8, characterized in that: The annular partition plate (4) and the sealing sleeve (5) are both assembled from a multi-petal structure; and / or, an air supply device (11) is provided on the oil suction atomization pipeline (10) or the liquid extraction pipe (6), and the air supply device (11) has an air intake valve (111), and the air supply device (11) can adjust the opening of the air intake valve (111) according to the internal and external pressure difference.

10. A generator set, characterized in that: The generator set comprises a main shaft (1), an oil pan (2), a lower frame (3) and a thrust bearing oil mist treatment system according to any one of claims 1 to 9.

Images