Bearing structure of steam turbine

Abstract

The utility model discloses a steam turbine bearing structure which comprises a bearing shell, an oil injection box is fixedly connected to the upper surface of the bearing shell, an oil groove is formed in the bearing shell, an oil injection hole is formed in the bearing shell, and an oil injection pipe is fixedly connected to the lower surface of the oil injection box. A second groove is formed in the bearing shell, a heat absorption piece is fixedly connected to the inner surface of the second groove, a heat conduction piece is fixedly connected to the right surface of the heat absorption piece, a cooling fin is fixedly connected to the right surface of the heat conduction piece, and lubricating oil is injected into an oil groove through an oil injection pipe and wraps and lubricates balls. When the balls rotate at a high speed, lubricating oil can protect the balls and prevent the balls from being overheated, the cooling fins are arranged in the bearing shell, the contact area between the cooling fins and air is increased, heat generated during bearing operation is dissipated more efficiently, the fault probability possibly caused by overheating is reduced, and the whole system operates more reliably.

Description

Technical Field

[0001] The utility model relates to the technical field of steam turbines, in particular to a steam turbine bearing structure. Background Art

[0002] The steam turbine bearing has a simple structure and strong load-bearing capacity, but its stability is relatively average. It can adapt to a certain degree of eccentric load, has good stability and self-aligning ability, and can effectively reduce problems such as oil film oscillation. It is widely used in large steam turbines. A steam turbine, also known as a steam turbine engine, is a rotary steam power device. The role of the steam turbine bearing is very crucial. It bears the weight of the steam turbine rotor, unbalanced forces, and various dynamic loads, ensuring that the rotor can rotate smoothly and at high speed, while reducing friction and wear, and guaranteeing the safe, stable, and efficient operation of the steam turbine. During the operation of the steam turbine, the lubrication of the bearing is of vital importance. Good maintenance management can effectively extend the service life of the bearing and improve the reliability of the steam turbine.

[0003] When the bearing on the steam turbine oil pump operates at high speed in cooperation with the steam turbine oil pump, the friction between the balls and the raceway is large, and the temperature of the internal bearing will rise rapidly, which may cause overheating. This will not only damage the bearing itself but also may have an adverse impact on the surrounding components. Summary of the Utility Model

[0004] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art. A steam turbine bearing structure is provided. Lubricating oil is injected into the oil sump through an oil injection pipe. The lubricating oil wraps and lubricates the balls. When the balls in the bearing rotate at high speed, the lubricating oil can protect the balls, prevent the balls from overheating, and there are heat sinks arranged inside the bearing housing. The heat sinks can increase the contact area with the air, so as to more efficiently dissipate the heat generated by the bearing operation, reduce the probability of failures that may be caused by overheating, and make the operation of the whole system more reliable.

[0005] To achieve the above purpose, the utility model also provides a steam turbine bearing structure with the above features, including: a bearing housing, an oil injection box is fixedly connected to the upper surface of the bearing housing, an oil sump is arranged inside the bearing housing, an oil injection hole is arranged inside the bearing housing, an oil injection pipe is fixedly connected to the lower surface of the oil injection box, balls are arranged inside the oil sump, a second groove is arranged inside the bearing housing, a heat absorption sheet is fixedly connected to the inner surface of the second groove, a heat conduction sheet is fixedly connected to the right surface of the heat absorption sheet, a heat sink is fixedly connected to the right surface of the heat conduction sheet, the surface of the ball contacts the inner ring, and an inner raceway groove is arranged inside the inner ring.

[0006] According to the described steam turbine bearing structure, high-temperature resistant coatings are provided on the surfaces of both the bearing housing and the balls, and corrosion-resistant coatings are provided on the surfaces of both the bearing housing and the balls.

[0007] According to the described steam turbine bearing structure, the numbers of the balls, heat absorption fins, heat conduction fins, and heat dissipation fins are all multiple and are distributed annularly. The number of oil injection boxes is two and they are distributed left and right. High-temperature resistant coatings are provided on the surfaces of both the bearing housing and the balls. The bearing housing and the balls have good high-temperature resistance, which can enable the bearing to operate stably in a high-temperature environment, reduce problems such as deformation and damage caused by high temperature, effectively resist the erosion of high temperature on the bearing housing and the balls, extend their service life. Even at high temperatures, it helps the lubricating oil maintain its performance, ensures the lubrication effect, reduces friction and wear, reduces the damage of thermal fatigue to the bearing, and makes the bearing more durable. Corrosion-resistant coatings are provided on the surfaces of both the bearing housing and the balls, which can significantly enhance the resistance to various corrosive media, effectively reduce its erosion of the bearing, extend the service life of the bearing, can reduce the risk of failures caused by corrosion, and ensure the stable operation of the equipment. Overall, it improves the quality and durability of the bearing.

[0008] According to the described steam turbine bearing structure, a first oil outlet hole is provided inside the bearing housing, and a second oil outlet hole is provided inside the inner ring. The lubricating oil in the rotating part of the balls enters the second collection box through the second oil outlet hole, which can timely export and collect the used lubricating oil, avoid waste, and is also conducive to the recycling or proper treatment of the lubricating oil.

[0009] According to the described steam turbine bearing structure, a second collection box is fixedly connected inside the inner ring, and a circular groove is provided inside the inner ring. The balls are in contact with the circular groove, and the circular groove can provide a stable support structure, enabling the balls to maintain a relatively fixed position during operation and ensuring the smoothness of operation.

[0010] According to the described steam turbine bearing structure, a first groove is provided inside the bearing housing, and the inner surface of the first groove is fixedly connected to the heat dissipation fins. The surface of the heat dissipation fins is in contact with the air, which can more efficiently dissipate the heat generated by the bearing operation.

[0011] According to the described steam turbine bearing structure, the side surface of the oil injection pipe is fixedly connected to the bearing housing, and a first collection box is fixedly connected to the lower surface of the bearing housing.

[0012] The additional aspects and advantages of the present utility model will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments;

[0014] Figure 1 It is a schematic diagram of the overall structure of a steam turbine bearing structure of the present utility model;

[0015] Figure 2 It is an exploded view of a steam turbine bearing structure of the present utility model;

[0016] Figure 3 It is a cross-sectional view of a steam turbine bearing structure of the present utility model;

[0017] Figure 4 is Figure 3 a schematic enlarged view of the structure at A in

[0018] Legend description:

[0019] 1. Bearing housing; 2. Oil injection box; 3. Oil groove; 4. Oil injection hole; 5. Oil injection pipe; 6. Ball; 7. First oil outlet hole; 8. First collection box; 9. Heat absorption fin; 10. Heat conduction fin; 11. Heat dissipation fin; 12. Inner ring; 13. Inner raceway groove; 14. Second oil outlet hole; 15. Second collection box; 16. Circular groove; 17. First groove; 18. Second groove. Specific implementation manner

[0020] This part will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The function of the drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but it cannot be construed as a limitation on the protection scope of the present utility model.

[0021] Refer to Figures 1-4The utility model embodiment is a turbine bearing structure, comprising: a bearing shell 1, an oil filling box 2 is fixedly connected to the upper surface of the bearing shell 1, an oil groove 3 is arranged inside the bearing shell 1, an oil filling hole 4 is arranged inside the bearing shell 1, an oil filling pipe 5 is fixedly connected to the lower surface of the oil filling box 2, lubricating oil can be injected into the oil groove 3 through the oil filling pipe 5, a ball 6 is arranged inside the oil groove 3, the ball 6 is wrapped by the lubricating oil when rotating, and the lubricating oil can protect the ball 6 when the ball 6 in the bearing runs at a high speed, and can prevent the ball 6 from overheating, and the bearing shell 1 is provided with a first A second groove 18, the inner surface of the second groove 18 is fixedly connected with a heat absorbing sheet 9, the right surface of the heat absorbing sheet 9 is fixedly connected with a heat conducting sheet 10, the right surface of the heat conducting sheet 10 is fixedly connected with a heat sink 11, the surface of the ball 6 is in contact with the inner ring 12, the heat generated when the bearing runs at high speed is transferred to the heat conducting sheet 10 through the heat absorbing sheet 9 and then dissipated through the heat sink 11, the heat sink 11 can increase the contact area with the air, so as to more efficiently dissipate the heat generated by the bearing operation, reduce the probability of failure caused by overheating, and keep the whole structure stable, the inner ring 12 is provided with an inner ring raceway groove 13, The inner ring 12 is provided with a second oil outlet hole 14, and the inner ring 12 is fixedly connected with a second collecting box 15. When the ball 6 runs at high speed, part of the lubricating oil enters the inner ring raceway groove 13 through the ball 6, and enters the second collecting box 15 through the second oil outlet hole 14, so that the used lubricating oil can be timely discharged and collected to avoid waste and also facilitate the recycling of lubricating oil. The surfaces of the bearing housing 1 and the ball 6 are provided with high temperature resistant coatings, and the surfaces of the bearing housing 1 and the ball 6 are provided with corrosion resistant coatings to reduce deformation of internal components caused by high temperature, thereby making the structure more stable. The number of the balls 6, the heat absorbing sheets 9, the heat conducting sheets 10, and the heat sinks 11 are all multiple and distributed in an annular manner. Multiple groups of heat absorbing sheets 9, heat conducting sheets 10, and heat sinks 11 are provided, and the structure has a good heat dissipation effect. The number of the oil filling boxes 2 is two and they are distributed on the left and right. The interior of the bearing housing 1 is provided with a first oil outlet 7, and the interior of the inner ring 12 is provided with a circular groove 16. The interior of the bearing housing 1 is provided with a first groove 17, and the inner surface of the first groove 17 is fixedly connected to the heat sink 11. The side surface of the oil filling pipe 5 is fixedly connected to the bearing housing 1, and the lower surface of the bearing housing 1 is fixedly connected to the first collection box 8.

[0022] Working principle: When the bearing on the steam turbine oil pump runs at high speed in cooperation with the steam turbine oil pump, lubricating oil is injected into the oil sump 3 through the oil injection pipe 5. The lubricating oil wraps and lubricates the ball 6. As the temperature inside the bearing running at high speed rises, the internal high temperature is absorbed by the heat absorption fin 9 and conducted to the heat dissipation fin 11 through the heat conduction fin 10. The surface of the heat dissipation fin 11 is in contact with the air, thus dissipating the heat. This structure injects lubricating oil into the oil sump 3 through the oil injection pipe 5, and the lubricating oil wraps and lubricates the ball 6. When the ball 6 inside the bearing runs at high speed, the lubricating oil can protect the ball 6 and prevent the ball 6 from overheating. Moreover, a heat dissipation fin 11 is arranged inside the bearing housing 1, and the heat dissipation fin 11 can increase the contact area with the air, thus more efficiently dissipating the heat generated by the bearing operation and reducing the probability of failures that may be caused by overheating, making the operation of the entire system more reliable.

[0023] The above has described the embodiments of the present invention in detail with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art in the said technical field, various changes can also be made without departing from the gist of the present invention.

Claims

1. A steam turbine bearing structure, characterized in that: include: A bearing shell (1), wherein an oil filling box (2) is fixedly connected to the upper surface of the bearing shell (1), an oil groove (3) is provided inside the bearing shell (1), an oil filling hole (4) is provided inside the bearing shell (1), an oil filling pipe (5) is fixedly connected to the lower surface of the oil filling box (2), a ball (6) is provided inside the oil groove (3), a second groove (18) is provided inside the bearing shell (1), a heat absorbing plate (9) is fixedly connected to the inner surface of the second groove (18), a heat conducting plate (10) is fixedly connected to the right surface of the heat absorbing plate (9), a heat dissipating plate (11) is fixedly connected to the right surface of the heat conducting plate (10), a surface of the ball (6) is in contact with an inner ring (12), and an inner ring raceway groove (13) is provided inside the inner ring (12).

2. A steam turbine bearing structure according to claim 1, characterized in that: The surfaces of the bearing shell (1) and the ball (6) are both provided with a high temperature resistant coating, and the surfaces of the bearing shell (1) and the ball (6) are both provided with a corrosion resistant coating.

3. A steam turbine bearing structure according to claim 1, characterized in that: The number of the balls (6), the heat absorbing plates (9), the heat conducting plates (10), and the heat sinks (11) are all multiple and distributed in a ring shape, and the number of the oil filling boxes (2) is two and distributed on the left and right.

4. A steam turbine bearing structure according to claim 1, characterized in that: The bearing housing (1) is provided with a first oil outlet hole (7) inside, and the inner ring (12) is provided with a second oil outlet hole (14) inside.

5. A steam turbine bearing structure according to claim 1, characterized in that: A second collecting box (15) is fixedly connected to the interior of the inner ring (12), and a circular groove (16) is provided inside the inner ring (12).

6. A steam turbine bearing structure according to claim 1, characterized in that: A first groove (17) is provided inside the bearing housing (1), and an inner surface of the first groove (17) is fixedly connected to the heat sink (11).

7. A steam turbine bearing structure according to claim 1, characterized in that: The side surface of the oil injection pipe (5) is fixedly connected to the bearing housing (1), and the lower surface of the bearing housing (1) is fixedly connected to a first collection box (8).

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