Backpack type bearing box

Abstract

The utility model discloses a backpack type bearing box and relates to the technical field of bearing boxes. The utility model aims to solve the problem that the bearing and a rotor can generate dry friction when the oil cut-off of the existing steam turbine set bearing occurs, so that the bush burning phenomenon of the set occurs. The bearing box comprises a bearing box body, a small oil tank, an oil inlet pipe, an oil dripping pipe and an exhaust pipe, the small oil tank is fixedly connected to the upper portion of the bearing box body, the oil inlet pipe is arranged on the small oil tank, the oil dripping pipe and the exhaust pipe are arranged in the small oil tank, and the lower ends of the oil dripping pipe and the exhaust pipe are communicated with the interior of the bearing box body. A plurality of oil dripping holes are evenly formed in the pipe wall of the oil dripping pipe in the height direction. The utility model is used for supporting and lubricating the bearing.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing boxes, in particular to a backpack type bearing box. Background Art

[0002] At present, the conventional thermal power steam turbine unit bearing oil inlet method is bottom oil inlet, and the interface with the bearing box is that the lower opening of the bearing box is connected to the bearing interface. During the operation of the unit, once the lubricating oil loses pressure and the unit is cut off from oil, dry friction will occur between the bearing and the rotor, and the unit may burn the bearing. Therefore, it is necessary to design a device that can supply oil and lubricate the bearing when the unit is cut off from oil. Utility Model Content

[0003] The utility model provides a backpack type bearing box to solve the problem that dry friction occurs between the bearing and the rotor of the existing steam turbine unit when the unit is cut off from oil, resulting in the burning of the unit's bearing shells.

[0004] The technical solution adopted by the utility model to solve the above technical problems is:

[0005] A backpack-type bearing box includes a bearing box body, a small oil tank, an oil inlet pipe, an oil dripping pipe and an exhaust pipe. The small oil tank is fixedly connected to the upper part of the bearing box body. The small oil tank is provided with an oil inlet pipe. The interior of the small oil tank is provided with an oil dripping pipe and an exhaust pipe. The lower ends of the oil dripping pipe and the exhaust pipe are respectively connected to the interior of the bearing box body. A plurality of oil dripping holes are evenly distributed on the wall of the oil dripping pipe along the height direction.

[0006] Furthermore, the oil dripping pipe and the exhaust pipe are both arranged vertically, and the upper ends of the oil dripping pipe and the exhaust pipe are respectively arranged at the upper part of the small oil tank.

[0007] Furthermore, a bearing cover is fixedly connected in the bearing housing, an oil inlet hole is opened in the upper part of the bearing cover in the vertical direction, and the lower end of the oil drip tube is fixedly connected to the bearing cover and communicated with the upper end of the oil inlet hole.

[0008] Furthermore, the small oil tank includes an oil tank top plate, two oil tank side plates and two oil tank end plates. The two oil tank side plates are arranged side by side and opposite to each other. The oil tank end plates are vertically fixed between the ends on the same side of the two oil tank side plates. The lower end surface of the oil tank top plate is respectively fixed to the upper ends of the oil tank side plates and the oil tank end plates. An opening is opened on the oil tank top plate, and a flange cover plate is fixed in the opening.

[0009] Furthermore, the oil inlet pipe is arranged inside the small oil tank, the oil inlet end of the oil inlet pipe is arranged horizontally, and the oil outlet end of the oil inlet pipe is arranged vertically upward.

[0010] Furthermore, an oil inlet flange is embedded on a side plate of the oil tank, and the oil inlet end of the oil inlet pipe is fixedly connected to the inner end of the oil inlet flange and is communicated with the central through hole of the oil inlet flange.

[0011] Furthermore, the bearing housing comprises two bearing half housings arranged opposite to each other up and down, and a small oil tank is arranged at the upper end of the upper bearing half housing.

[0012] Furthermore, the bearing half box body includes a bearing box top plate, two bearing box end plates and two bearing box side plates. The two bearing box side plates are arranged side by side and opposite to each other. The bearing box end plates are vertically fixed between the ends on the same side of the two bearing box side plates. The lower end surface of the bearing box top plate is respectively fixed to the upper ends of the bearing box side plates and the bearing box end plates.

[0013] Furthermore, the lower end of the exhaust pipe is inserted and fixedly connected to the upper bearing box top plate.

[0014] Furthermore, two groups of lifting ring plates are symmetrically fixed to the outer side of the small oil tank.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The utility model provides a backpack-type bearing box, in which an independent small oil tank is designed on the upper part of the bearing box. When the unit is running, the lubricating oil first enters the backpack and then enters the bearing through the upper cover of the bearing box. When the unit is cut off from oil, the bearing box is already full of oil, and the purpose of lubricating the bearing is achieved by the amount of oil stored in the backpack. The lubricating oil flows into the bearing by its own gravity to lubricate the unit, which can effectively improve the dry friction between the bearing shell and the rotor when the unit is cut off from oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a top view of the overall structure of the utility model;

[0018] Figure 2 This is a front cross-sectional view of the upper and middle bearing box half-box and the small oil tank at the upper end of the utility model;

[0019] Figure 3 yes Figure 2 AA view in . DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0021] Specific implementation method 1: Combination Figures 1 to 3To illustrate the present embodiment, a backpack-type bearing box described in the present embodiment includes a bearing box body 1, a small oil tank 2, an oil inlet pipe 3, an oil dripping pipe 4 and an exhaust pipe 5. The small oil tank 2 is fixedly connected to the upper part of the bearing box body 1, and the small oil tank 2 is provided with an oil inlet pipe 3. The interior of the small oil tank 2 is provided with an oil dripping pipe 4 and an exhaust pipe 5. The lower ends of the oil dripping pipe 4 and the exhaust pipe 5 are respectively connected to the interior of the bearing box body 1, and a plurality of oil dripping holes 41 are evenly distributed on the tube wall along the height direction.

[0022] In this embodiment, the lubricating oil in the oil supply lubrication system of the unit first enters the small oil tank 2 through the oil inlet pipe 3, and is connected to the bearing seat interface with an oil dripping pipe 4, on which a plurality of oil dripping holes 41 are provided. When the oil is cut off, the oil inside the small oil tank 2 enters the oil dripping pipe 4 through the oil dripping holes 41, then enters the bearing seat, and finally enters the bearing to lubricate the bearing. In order to prevent the vacuum negative pressure lubricating oil from flowing out, an exhaust pipe 5 connected to it is provided in the box, so that the lubricating oil can flow out smoothly.

[0023] Specific implementation method 2: Combination Figures 1 to 3 To explain this embodiment, the oil dripping pipe 4 and the exhaust pipe 5 are both arranged vertically, and the upper ends of the oil dripping pipe 4 and the exhaust pipe 5 are respectively arranged at the upper part of the small oil tank 2. The undisclosed technical features in this embodiment are the same as those in the first embodiment.

[0024] Such design ensures that the lubricating oil can smoothly enter the oil dripping pipe 4 and the gas can be smoothly discharged from the exhaust pipe 5.

[0025] Specific implementation method three: Combination Figures 1 to 3 To explain this embodiment, a bearing cover 11 is fixedly connected to the bearing housing 1 in this embodiment, an oil inlet hole 12 is opened in the upper part of the bearing cover 11 in the vertical direction, and the lower end of the oil drip tube 4 is fixedly connected to the bearing cover 11 and communicated with the upper end of the oil inlet hole 12. The undisclosed technical features in this embodiment are the same as those in the second specific embodiment.

[0026] The bearing gland 11 is used to support and limit the bearing, and the lubricating oil in the oil drip tube 4 flows out through the oil inlet hole 12 and enters the bearing for lubrication.

[0027] Specific implementation method four: Combination Figures 1 to 3 This embodiment is described. The small oil tank 2 in this embodiment includes an oil tank top plate 21, two oil tank side plates 22 and two oil tank end plates 23. The two oil tank side plates 22 are arranged side by side and opposite to each other. The ends of the two oil tank side plates 22 on the same side are vertically fixed with the oil tank end plates 23. The lower end surface of the oil tank top plate 21 is respectively fixed with the upper ends of the oil tank side plates 22 and the oil tank end plates 23. The oil tank top plate 21 is provided with an opening 24, and a flange cover plate 25 is fixed in the opening 24. The undisclosed technical features in this embodiment are the same as those in the first embodiment.

[0028] The overall shape of the small oil tank 2 is a rectangular box.

[0029] Specific implementation method five: Combination Figures 1 to 3 To explain this embodiment, the oil inlet pipe 3 in this embodiment is arranged inside the small oil tank 2, the oil inlet end of the oil inlet pipe 3 is arranged horizontally, and the oil outlet end of the oil inlet pipe 3 is arranged vertically upward. The undisclosed technical features in this embodiment are the same as those in the first embodiment.

[0030] The oil outlet end of the oil inlet pipe 3 is arranged upward to prevent the lubricating oil in the small oil tank 2 from flowing out in the reverse direction through the oil inlet pipe 3 .

[0031] Specific implementation method six: Combination Figures 1 to 3 To explain this embodiment, an oil inlet flange 26 is embedded on one of the oil tank side panels 22, and the oil inlet end of the oil inlet pipe 3 is fixedly connected to the inner end of the oil inlet flange 26 and communicated with the central through hole of the oil inlet flange 26. The undisclosed technical features in this embodiment are the same as those in the fourth embodiment.

[0032] Specific implementation method seven: Combination Figures 1 to 3 This embodiment is described, the bearing housing 1 in this embodiment comprises two upper and lower bearing half housings arranged opposite to each other, and the small oil tank 2 is arranged at the upper end of the upper bearing half housing. The undisclosed technical features in this embodiment are the same as those in the first embodiment.

[0033] Specific implementation method eight: Combination Figures 1 to 3 This embodiment is described. The bearing half box body described in this embodiment includes a bearing box top plate 13, two bearing box end plates 14 and two bearing box side plates 15. The two bearing box side plates 15 are arranged side by side and opposite to each other. The bearing box end plates 14 are vertically fixed between the ends on the same side of the two bearing box side plates 15. The lower end surface of the bearing box top plate 13 is respectively fixed to the upper ends of the bearing box side plates 15 and the bearing box end plates 14. The undisclosed technical features in this embodiment are the same as those in the specific embodiment seven.

[0034] The shape of the bearing housing 1 is a rectangular housing, and flange plates are respectively provided on the outer sides of the connecting end faces of the two half-bearing housings, and the two half-bearing housings are fixedly connected to form an integral housing through the flange plates.

[0035] Specific implementation method nine: Combination Figures 1 to 3 To explain this embodiment, the lower end of the exhaust pipe 5 in this embodiment is inserted and fixedly connected to the upper bearing box top plate 13. The undisclosed technical features in this embodiment are the same as those in the specific embodiment eight.

[0036] Specific implementation method ten: Combination Figures 1 to 3To explain this embodiment, two sets of eye plates 6 are symmetrically fixed to the outer side of the small oil tank 2 in this embodiment. The undisclosed technical features in this embodiment are the same as those in the first embodiment.

[0037] In order to meet the requirement of thermal power steam turbine unit to continue lubricating bearings when oil is cut off, the utility model newly sets up a backpack-type bearing box, optimizes the upper part of the traditional bearing box, forms an oil filling space with a small oil tank 2 on the upper part of the bearing box, and punches oil dripping holes 41 on the oil dripping pipe 4. The number and size of the punched oil dripping holes 41 are used to control the oil dripping time. The oil inlet pipe of the No. 2 bearing box is listed below for calculation:

[0038] According to the formula D2 = 353.68*Q / v

[0039] Where D is the diameter in mm and Q is the flow rate in m. 3 / h; v——flow velocity, the unit is m / s.

[0040] From the above formula, we can get: Q = vD2 / 353.68,

[0041] T=V / Q=353.68V / vD2, where T is the oil flow time in hours; V is the volume of small oil tank 2 in m 3 .

[0042] The oil dripping pipe is divided into 11 working conditions for calculation. The time of each working condition is calculated separately and then accumulated.

[0043] T1 = 0.38 points, T2 = 1.77 points, T3 = 0.91 points, T4 = 1.02 points, T5 = 1.17 points, T6 = 1.36 points, T7 = 1.64 points, T8 = 2.05 points, T9 = 2.73 points, T10 = 4.09 points, T11 = 0.22 points,

[0044] Total T = T1 + T2 + T3 + T4 + T5 + T6 + T7 + T8 + T9 + T10 + T11 = 17.34 minutes.

[0045] By designing the size of the backpack and controlling the size of the aperture of the oil dropper, the oil flow time of each backpack is 15-20 minutes.

[0046] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A backpack type bearing box, characterized in that: The invention comprises a bearing housing (1), a small oil tank (2), an oil inlet pipe (3), an oil dripping pipe (4) and an exhaust pipe (5); the small oil tank (2) is fixedly connected to the upper part of the bearing housing (1); the small oil tank (2) is provided with an oil inlet pipe (3); the interior of the small oil tank (2) is provided with an oil dripping pipe (4) and an exhaust pipe (5); the lower ends of the oil dripping pipe (4) and the exhaust pipe (5) are respectively connected to the interior of the bearing housing (1); and a plurality of oil dripping holes (41) are evenly distributed on the wall of the oil dripping pipe (4) along the height direction.

2. A backpack type bearing box according to claim 1, characterized in that: The oil dripping pipe (4) and the exhaust pipe (5) are both arranged vertically, and the upper ends of the oil dripping pipe (4) and the exhaust pipe (5) are respectively arranged at the upper part of the small oil tank (2).

3. A backpack type bearing box according to claim 2, characterized in that: A bearing cover (11) is fixedly connected inside the bearing housing (1), an oil inlet hole (12) is provided on the upper part of the bearing cover (11) in a vertical direction, and the lower end of the oil drip pipe (4) is fixedly connected to the bearing cover (11) and communicated with the upper end of the oil inlet hole (12).

4. The backpack type bearing box according to claim 1, characterized in that: The small oil tank (2) comprises an oil tank top plate (21), two oil tank side plates (22) and two oil tank end plates (23). The two oil tank side plates (22) are arranged side by side and opposite to each other. The ends of the two oil tank side plates (22) on the same side are vertically fixedly connected to the oil tank end plates (23). The lower end surface of the oil tank top plate (21) is respectively fixedly connected to the upper ends of the oil tank side plates (22) and the oil tank end plates (23). The oil tank top plate (21) is provided with an opening (24), and a flange cover plate (25) is fixedly connected inside the opening (24).

5. The backpack type bearing box according to claim 1, characterized in that: The oil inlet pipe (3) is arranged inside the small oil tank (2), the oil inlet end of the oil inlet pipe (3) is arranged horizontally, and the oil outlet end of the oil inlet pipe (3) is arranged vertically upward.

6. A backpack type bearing box according to claim 4, characterized in that: An oil inlet flange (26) is embedded on an oil tank side plate (22), and the oil inlet end of the oil inlet pipe (3) is fixedly connected to the inner side end of the oil inlet flange (26) and communicated with the central through hole of the oil inlet flange (26).

7. The backpack type bearing box according to claim 1, characterized in that: The bearing housing (1) comprises two bearing half housings arranged opposite to each other up and down, and a small oil tank (2) is arranged at the upper end of the upper bearing half housing.

8. A backpack type bearing box according to claim 7, characterized in that: The bearing half box body comprises a bearing box top plate (13), two bearing box end plates (14) and two bearing box side plates (15); the two bearing box side plates (15) are arranged side by side and opposite to each other; the bearing box end plates (14) are vertically fixed between the ends on the same side of the two bearing box side plates (15); and the lower end surface of the bearing box top plate (13) is fixedly connected to the upper ends of the bearing box side plates (15) and the bearing box end plates (14), respectively.

9. A backpack type bearing box according to claim 8, characterized in that: The lower end of the exhaust pipe (5) is inserted and fixedly connected to the upper bearing box top plate (13).

10. The backpack type bearing box according to claim 1, characterized in that: Two groups of lifting ring plates (6) are symmetrically fixed to the outer side of the small oil tank (2).

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