Temporary oil baffle device for preventing oil spillage in nuclear power turbine bearing housing
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-02
- Publication Date
- 2026-08-14
AI Technical Summary
[0008]本实用新型要解决的技术问题在于，提供一种核电汽轮机轴承箱防跑油临时油挡装置，以解决维修过程中，当轴承箱外油挡下半拆除后，顶轴油启动时轴承箱防跑油问题
[0020]实施本实用新型具有以下有益效果：核电汽轮机轴承箱防跑油临时油挡装置可直接卡到轴承箱下部油挡安装位置，其安装和拆卸简单快捷。其结构简单轻巧，制造成本较低，经济性较高。
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Figure CN224634608U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of nuclear power technology, and in particular to a temporary oil baffle device for preventing oil leakage in the bearing housing of a nuclear power turbine. Background Technology
[0002] like Figure 1 As shown, the nuclear power turbine of a certain nuclear power plant is the HN1000-6.43 single-shaft, three-cylinder, four-exhaust condensing half-speed nuclear power turbine manufactured by Shanghai Turbine Works using technology imported from Siemens, Germany. The turbine includes one high-pressure cylinder 100, one low-pressure cylinder 200, and one low-pressure cylinder 300. Bearing housing 400 (No. 1) and bearing housing 500 (No. 2) are arranged before and after the high-pressure cylinder 100. Bearing housing 600 (No. 3) is located between low-pressure cylinders 200 and 300. Bearing housing 700 (No. 4) is located between low-pressure cylinder 300 and generator 800. External oil baffles are designed on the rear side of bearing housing 400, and on the front and rear sides of bearing housings 500, 600, and 700 to prevent leakage of bearing lubricating oil.
[0003] However, during maintenance, it is necessary to disassemble the lower half of the outer oil baffle of the bearing housing for maintenance activities such as measuring the oil baffle recess. At this time, due to the excessive weight of the turbine rotor, it is necessary to start the jacking oil to rotate the turbine rotor for maintenance items such as coupling wheel relocation and shaft center adjustment. To prevent oil leakage from the bearing housing in this state from becoming a key issue (oil leakage will lead to equipment contamination, especially oil leakage from the bearing housings before and after high-pressure cylinder 100, which will cause lubricating oil to enter the insulation of high-pressure cylinder 100, posing a fire hazard of high-temperature combustion), frequent disassembly and reassembly of the lower half of the outer oil baffle of the bearing housing will significantly increase the maintenance period.
[0004] Specifically, the following problems were found during the on-site overhaul of the turbine bearing housing: the lower half of the outer oil baffle of the bearing housing was not removed during the overhaul; the lower half of the outer oil baffle of the bearing housing was removed during the overhaul.
[0005] The following effects exist: (1) If the lower half of the outer oil baffle of the bearing housing is not removed during the maintenance process, maintenance work such as oil baffle pits will not be able to be carried out.
[0006] (2) Due to the excessive weight of the turbine rotor, it is necessary to start the jacking oil to rotate the turbine rotor for maintenance items such as coupling assembly and disassembly and shaft center adjustment. Removing the lower half of the bearing box oil baffle and starting the jacking oil will cause oil leakage, especially oil leakage from the front and rear bearing boxes of the high pressure cylinder. This will cause lubricating oil to enter the high pressure cylinder insulation, posing a fire hazard of oil combustion due to high temperature.
[0007] (3) During the operation of the top shaft oil, the lower half of the oil baffle outside the bearing box is reinstalled and then removed later, which increases the labor intensity and maintenance period of maintenance personnel and is not conducive to the implementation of cost reduction and efficiency improvement work in major overhaul. Utility Model Content
[0008] The technical problem to be solved by this utility model is to provide a temporary oil baffle device for preventing oil leakage in the bearing housing of a nuclear power turbine, so as to solve the problem of preventing oil leakage in the bearing housing when the lower half of the outer oil baffle of the bearing housing is removed and the jacking oil is started during maintenance.
[0009] The technical solution adopted by this utility model to solve its technical problem is as follows: a temporary oil baffle device for preventing oil leakage in a nuclear power turbine bearing box is constructed, including a first semi-circular ring plate, a second semi-circular ring plate, an arc plate, and several connecting rods; the first semi-circular ring plate and the second semi-circular ring plate are arranged parallel to each other and spaced apart; the arc plate connects the opposite inner surfaces of the first semi-circular ring plate and the second semi-circular ring plate, and the arc plate is close to the inner end face of the first semi-circular ring plate and the second semi-circular ring plate; several connecting rods connect the opposite inner surfaces of the first semi-circular ring plate and the second semi-circular ring plate, and all the connecting rods are arranged at intervals along the same arc.
[0010] In some embodiments, all of the connecting rods are perpendicularly connected to the opposite inner surfaces of the first semicircular ring plate and the second semicircular ring plate.
[0011] In some embodiments, the axial ends of all the connecting rods do not protrude beyond the outer surfaces of the first semicircular ring plate and the second semicircular ring plate.
[0012] In some embodiments, the portion of the connecting rod located between the first semicircular plate and the second semicircular plate is cylindrical.
[0013] In some embodiments, the first semicircular ring plate, the second semicircular ring plate, the arc plate, and the connecting rod are all aluminum alloy parts.
[0014] In some embodiments, the number of connecting rods is at least five.
[0015] In some embodiments, the first end of the first semicircular ring plate and the first end of the second semicircular ring plate are in the same plane, and the second end of the first semicircular ring plate and the second end of the second semicircular ring plate are in the same plane.
[0016] In some embodiments, the inner end face of the first semicircular ring plate is flush with the inner end face of the second semicircular ring plate.
[0017] The outer end face of the first semicircular ring plate is flush with the outer end face of the second semicircular ring plate.
[0018] In some embodiments, the first semicircular ring plate and the second semicircular ring plate have the same shape and size.
[0019] In some embodiments, the thickness of both the first semicircular ring plate and the second semicircular ring plate is 3 mm.
[0020] The present invention offers the following advantages: the temporary oil baffle device for preventing oil leakage in nuclear power turbine bearing housings can be directly snapped into the lower oil baffle installation position of the bearing housing, making its installation and disassembly simple and quick. Its structure is simple and lightweight, with low manufacturing costs and high economic efficiency. Attached Figure Description
[0021] To more clearly illustrate the technical solution of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show some embodiments of this utility model and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort. In the drawings:
[0022] Figure 1 This is a simplified diagram of a nuclear power turbine.
[0023] Figure 2 This is a partial structural diagram of bearing housing No. 1;
[0024] Figure 3 This is one of the structural schematic diagrams of a temporary oil baffle device for preventing oil leakage in a nuclear power turbine bearing housing according to some embodiments of this utility model;
[0025] Figure 4 This is the second schematic diagram of the temporary oil baffle device for preventing oil leakage in the bearing housing of a nuclear power turbine in some embodiments of this utility model;
[0026] Figure 5 This is the third schematic diagram of the temporary oil baffle device for preventing oil leakage in the bearing housing of a nuclear power turbine in some embodiments of this utility model;
[0027] Figure 6 This is a schematic diagram of the parameters of the temporary oil baffle device for preventing oil leakage in the bearing housing of a nuclear power turbine in some embodiments of this utility model;
[0028] Figure 7 This is a schematic diagram of the parameters of the temporary oil baffle device for preventing oil leakage in the bearing housing of a nuclear power turbine in some embodiments of this utility model;
[0029] Figure 8 This is a parameter diagram of the temporary oil baffle device for preventing oil leakage in the bearing housing of a nuclear power turbine in some other embodiments of this utility model;
[0030] Figure 9 This is a parameter diagram of a temporary oil baffle device for preventing oil leakage in the bearing housing of a nuclear power turbine in some other embodiments of this utility model. Detailed Implementation
[0031] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation; therefore, they should not be construed as limitations on this utility model.
[0032] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0033] In the following description, specific details such as particular system structures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
[0034] See Figures 3 to 5 In order to solve the problem of oil leakage from the bearing housing when the top shaft oil is started after the lower half of the outer oil baffle of the bearing housing is removed during maintenance, this utility model shows a temporary oil baffle device for preventing oil leakage from the bearing housing of a nuclear power turbine, including a first semi-circular ring plate 10, a second semi-circular ring plate 20, an arc plate 30, and several connecting rods 40.
[0035] The first semicircular ring plate 10 and the second semicircular ring plate 20 are arranged parallel to each other and spaced apart. The arc-shaped plate 30 connects the opposing inner surfaces of the first semicircular ring plate 10 and the second semicircular ring plate 20, and the arc-shaped plate 30 is close to the inner end faces of the first semicircular ring plate 10 and the second semicircular ring plate 20. The arc-shaped plate 30 can improve the overall structural strength of the device and make the device relatively enclosed. A plurality of connecting rods 40 connect the opposing inner surfaces of the first semicircular ring plate 10 and the second semicircular ring plate 20, and all the connecting rods 40 are spaced apart along the same arc. The plurality of connecting rods 40 may connect the middle position of the first semicircular ring plate 10 and the second semicircular ring plate 20, that is, the plurality of connecting rods 40 may connect the portion between the inner end faces and the outer end faces of the first semicircular ring plate 10 and the second semicircular ring plate 20.
[0036] Combination Figures 2 to 5 As shown, taking bearing housing 400 No. 1 as an example, when it is necessary to install the temporary oil baffle device for preventing oil leakage in the nuclear power turbine bearing housing, the temporary oil baffle device is flipped into the installation position of bearing housing 400 No. 1. The connecting rod 40 can be attached to the arc-shaped protrusion 401 of bearing housing 400 No. 1. The connecting rod 40 plays a supporting and limiting role. When it is necessary to remove the temporary oil baffle device for preventing oil leakage from bearing housing 400 No. 1, the connecting rod 40 can be hooked by a hook or other device to flip the temporary oil baffle device out of bearing housing 400 No. 1.
[0037] See Figures 3 to 5 In some embodiments, all of the connecting rods 40 are perpendicularly connected to the opposite inner surfaces of the first semicircular ring plate 10 and the second semicircular ring plate 20.
[0038] See Figures 3 to 5 In some embodiments, the axial ends of all the connecting rods 40 do not protrude beyond the outer surfaces of the first semicircular ring plate 10 and the second semicircular ring plate 20, which can improve the overall simplicity of the temporary oil baffle device for preventing oil leakage in the nuclear power turbine bearing housing and avoid interference with other components of the bearing housing.
[0039] See Figures 3 to 5 In some embodiments, the portion of the connecting rod 40 located between the first semicircular plate 10 and the second semicircular plate 20 is cylindrical.
[0040] See Figures 3 to 5 In some embodiments, the first semi-circular ring plate 10, the second semi-circular ring plate 20, the arc-shaped plate 30, and the connecting rod 40 are all made of aluminum alloy. The temporary oil baffle device for preventing oil leakage in the nuclear power turbine bearing housing uses aluminum alloy components. Aluminum alloy is lightweight, easy to handle, and will not cause wear to the rotor structure.
[0041] See Figures 3 to 5 In some embodiments, the number of connecting rods 40 is at least five. The number of connecting rods 40 can be five, six, seven, eight, or any other arbitrary number, which is not specifically limited here. The two ends of the connecting rod 40 can be welded and fixed to the first semi-circular ring plate 10 and the second semi-circular ring plate 20, or fixed in other ways, which is not specifically limited here.
[0042] See Figures 3 to 5 In some embodiments, the first end of the first semicircular ring plate 10 and the first end of the second semicircular ring plate 20 are on the same plane, and the second end of the first semicircular ring plate 10 and the second end of the second semicircular ring plate 20 are on the same plane. In some embodiments, the inner end face of the first semicircular ring plate 10 is flush with the inner end face of the second semicircular ring plate 20; the outer end face of the first semicircular ring plate 10 is flush with the outer end face of the second semicircular ring plate 20, making the overall structure of the temporary oil baffle device for preventing oil leakage in the nuclear power turbine bearing housing simpler and with higher assembly precision, thus providing better protection against oil leakage.
[0043] See Figures 3 to 5 In some embodiments, the first semicircular ring plate 10 and the second semicircular ring plate 20 have the same shape and size. In some embodiments, the thickness of the first semicircular ring plate 10 and the second semicircular ring plate 20 is 3 mm.
[0044] like Figure 6 As shown, in some embodiments, the outer diameter of the first semicircular ring plate 10 and the second semicircular ring plate 20 is 1002 mm, and the inner diameter is 750 mm. For example... Figure 8 As shown, in some embodiments, the outer diameter of the first semicircular ring plate 10 and the second semicircular ring plate 20 is 972 mm, and the inner diameter is 700 mm. For example... Figure 9 As shown, in some embodiments, the outer diameter of the first semicircular ring plate 10 and the second semicircular ring plate 20 is 772 mm, and the inner diameter is 450 mm, to accommodate bearing housings of different specifications.
[0045] like Figure 7 The figure shows some parameter limitations of the temporary oil baffle device for preventing oil leakage in the nuclear power turbine bearing housing. The temporary oil baffle device for preventing oil leakage in the nuclear power turbine bearing housing of this application can be implemented according to these parameters, but no specific limitations are made here.
[0046] This temporary oil baffle device for preventing oil leakage in nuclear power turbine bearing housings has the following technical advantages: simple and lightweight structure, low manufacturing cost, and high economic efficiency. The device can be directly installed on the outside of the bearing housing using a flip-in installation method, without bolt fixation. It directly snaps into the lower oil baffle installation position of the bearing housing, making installation and disassembly simple and quick.
[0047] The temporary oil baffle device for preventing oil leakage in nuclear power turbine bearing housings has a simple structure and is easy to install, which greatly improves maintenance efficiency.
[0048] The temporary oil baffle device for preventing oil leakage in the nuclear power turbine bearing housing is installed on the outside of the bearing housing, and its inside is completely sealed. If there is oil, it will flow back into the bearing housing, which improves the reliability of preventing oil leakage in the bearing housing during maintenance.
[0049] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.
Claims
1. A temporary oil baffle device for preventing oil leakage in a nuclear power turbine bearing housing, characterized in that, It includes a first semicircular ring plate (10), a second semicircular ring plate (20), an arc plate (30), and a plurality of connecting rods (40); the first semicircular ring plate (10) and the second semicircular ring plate (20) are arranged parallel to each other and spaced apart; the arc plate (30) connects the opposite inner surfaces of the first semicircular ring plate (10) and the second semicircular ring plate (20), and the arc plate (30) is close to the inner end surfaces of the first semicircular ring plate (10) and the second semicircular ring plate (20); the plurality of connecting rods (40) connect the opposite inner surfaces of the first semicircular ring plate (10) and the second semicircular ring plate (20), and all the connecting rods (40) are arranged spaced apart along the same arc.
2. The oil run-out temporary dam device for a nuclear power steam turbine bearing chamber according to claim 1, characterized by, All of the connecting rods (40) are perpendicularly connected to the opposite inner surfaces of the first semicircular ring plate (10) and the second semicircular ring plate (20).
3. The oil run-out temporary dam device for a nuclear power steam turbine bearing chamber according to claim 1, characterized by, The axial ends of all the connecting rods (40) do not protrude beyond the outer surfaces of the first semicircular ring plate (10) and the second semicircular ring plate (20).
4. The oil run-out temporary dam device for a nuclear power steam turbine bearing chamber according to claim 1, characterized by, The portion of the connecting rod (40) located between the first semicircular ring plate (10) and the second semicircular ring plate (20) is cylindrical.
5. The oil run-out temporary dam device for a nuclear power steam turbine bearing chamber according to claim 1, characterized by, The first semi-circular ring plate (10), the second semi-circular ring plate (20), the arc plate (30) and the connecting rod (40) are all aluminum alloy parts.
6. The oil run-out temporary dam device for a nuclear power steam turbine bearing chamber according to claim 1, characterized by, The number of connecting rods (40) is at least five.
7. The oil run-out temporary dam device for a nuclear power steam turbine bearing chamber according to claim 1, characterized by, The first end of the first semicircular ring plate (10) and the first end of the second semicircular ring plate (20) are on the same plane, and the second end of the first semicircular ring plate (10) and the second end of the second semicircular ring plate (20) are on the same plane.
8. The temporary oil baffle device for preventing oil leakage in nuclear power turbine bearing housing according to claim 1, characterized in that, The inner end face of the first semi-circular ring plate (10) is flush with the inner end face of the second semi-circular ring plate (20); The outer end face of the first semicircular ring plate (10) is flush with the outer end face of the second semicircular ring plate (20).
9. The temporary oil baffle device for preventing oil leakage in the bearing housing of a nuclear power turbine according to claim 1, characterized in that, The first semicircular ring plate (10) and the second semicircular ring plate (20) have the same shape and size.
10. The temporary oil baffle device for preventing oil leakage in the bearing housing of a nuclear power turbine according to claim 1, characterized in that, The thickness of the first semicircular ring plate (10) and the second semicircular ring plate (20) is 3mm.