Device for preventing water from entering engine oil of steam turbine

Abstract

The utility model discloses a steam turbine engine oil waterproof device, which relates to the technical field of steam turbines, and comprises a first sealing element, the first sealing element is fixedly sleeved on a rotating shaft, the first sealing element consists of a metal base ring, a first rubber sleeve and an annular sealing rubber element, the first rubber sleeve is sleeved on the metal base ring, and the annular sealing rubber element is sleeved on the first rubber sleeve. The annular sealing rubber part is fixedly installed on the outer wall of the first rubber sleeve, the second sealing part is movably installed on the first sealing part, the sealing assembly composed of the first sealing part and the second sealing part is arranged, and the second sealing part is connected with the air supply equipment, so that high air pressure can be kept in the first sealing part and the second sealing part, and the sealing effect is good. Under the action of the air pressure, the annular sealing rubber part is tightly attached to the rubber sealing ring and the sealing rubber ring, so that steam is blocked, the steam can be prevented from entering the bearing box, and finally water is prevented from entering engine oil in the bearing box.

Description

Technical Field

[0001] This utility model relates to the field of steam turbine technology, and in particular to a steam turbine oil anti-water ingress device. Background Technology

[0002] A steam turbine, also known as a steam engine, is a rotary steam power unit. High-temperature, high-pressure steam passes through a fixed nozzle, becomes an accelerated airflow, and is then injected onto blades, causing a rotor equipped with rows of blades to rotate and perform work. Thus, steam power is converted into mechanical power. Steam turbines are the main equipment in modern thermal power plants, possessing advantages such as high single-unit power, high efficiency, and long service life. Therefore, they are widely used in the metallurgical industry, chemical industry, and ship propulsion systems.

[0003] Excessive water content in turbine oil is a common fault in power plants. High water content can lead to oil emulsification, degrading oil quality and seriously jeopardizing the safe operation of the turbine. This manifests primarily as oxidation and corrosion of the regulating and safety components, causing jamming, load fluctuations and overspeeding, oil deterioration, inability to form an oil film, vibration and bearing failure, and even excessive hydrogen levels in hydrogen-cooled generators, all of which seriously compromise safe operation. Excessive water content in the turbine oil is caused by water entering the turbine oil. The main reason for this is that when the turbine's gas seal pressure is too high, steam from inside the cylinder enters the bearing housing through the bearing oil seal gaps, cools, and forms water droplets, causing water to enter the bearing housing oil. Therefore, a turbine oil water ingress prevention device is needed to solve these problems. Utility Model Content

[0004] The main purpose of this utility model is to provide a turbine oil anti-water ingress device, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A turbine oil anti-water ingress device includes a first sealing element, which is fixedly sleeved on a rotating shaft. The first sealing element consists of a metal base ring, a first rubber sleeve, and an annular sealing rubber element. The first rubber sleeve is sleeved on the metal base ring, and the annular sealing rubber element is fixedly installed on the outer wall of the first rubber sleeve. A second sealing element is movably installed on the first sealing element. The second sealing element consists of an annular metal frame, a second rubber sleeve, a connecting tube, rubber sealing rings, and sealing rubber rings. The second rubber sleeve is sleeved on the annular metal frame, and the connecting tube is fixedly inserted into the annular metal frame and the second rubber sleeve. There are two rubber sealing rings symmetrically fixedly installed on the inner wall of the second rubber sleeve, and four sealing rubber rings are respectively fixedly installed on the inner ends of the two rubber sealing rings.

[0007] Preferably, the metal base ring and the first rubber sleeve on the first seal are fixedly connected, and the first rubber sleeve is also fixedly connected to the rotating shaft.

[0008] Preferably, the cross-section of the annular sealing rubber component on the first sealing component is a U-shaped structure with the opening facing outwards. Two annular sealing grooves are opened at the outer ends of the two side walls of the annular sealing rubber component, and the bottom wall of the annular sealing rubber component is fixedly connected to the first rubber sleeve.

[0009] Preferably, the second seal is rotatably connected to the first seal, and the second seal is located on the outside of the first rubber sleeve and is also sleeved on the outside of the annular sealing rubber element.

[0010] Preferably, the annular metal frame and the second rubber sleeve on the second sealing element are fixedly connected. The cross-section of the annular metal frame and the second rubber sleeve is a U-shaped structure with the opening facing inward. The annular metal frame and the second rubber sleeve are provided with connecting holes. The connecting holes penetrate the bottom wall of the annular metal frame and the second rubber sleeve from the inside and outside. The connecting tube is fixedly inserted into the connecting holes. The connecting tube is connected to the gas supply equipment through a pipe.

[0011] Preferably, the two rubber sealing rings on the second sealing member are respectively fixedly installed on the inner ends of the two side walls of the second rubber sleeve, and the two rubber sealing rings are respectively located on both sides of the annular sealing rubber member, and the sealing rubber rings are embedded in the annular sealing groove.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] By setting up a sealing assembly consisting of a first seal and a second seal, and connecting the second seal to the air supply equipment, a high air pressure can be maintained inside the first and second seals. Under the action of this air pressure, the annular sealing rubber component, the rubber sealing ring, and the sealing rubber ring fit tightly together, thereby blocking steam and preventing steam from entering the bearing housing, and ultimately preventing water from entering the bearing housing oil. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a cross-sectional view of the positional relationship between the first and second sealing elements of this utility model.

[0016] Figure 3 For the present utility model Figure 2 A magnified view of point A;

[0017] Figure 4 This is a cross-sectional view of the second sealing element of this utility model;

[0018] Figure 5 This is a cross-sectional view of the first sealing element of this utility model.

[0019] In the figure: 1. First seal; 2. Second seal; 3. Rotating shaft; 4. Metal base ring; 5. First rubber sleeve; 6. Annular sealing rubber component; 7. Annular sealing groove; 8. Annular metal frame; 9. Second rubber sleeve; 10. Connecting tube; 11. Rubber sealing ring; 12. Sealing rubber ring; 13. Connecting socket. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0021] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, a turbine oil anti-water ingress device includes a first seal 1, which is fixedly sleeved on a rotating shaft 3. The first seal 1 consists of a metal base ring 4, a first rubber sleeve 5, and an annular sealing rubber component 6. The first rubber sleeve 5 is sleeved on the metal base ring 4, and the annular sealing rubber component 6 is fixedly installed on the outer wall of the first rubber sleeve 5. A second seal 2 is movably installed on the first seal 1. The second seal 2 consists of an annular metal frame 8, a second rubber sleeve 9, a connecting tube 10, a rubber sealing ring 11, and a sealing rubber ring. The device consists of 12 components. The second rubber sleeve 9 is fitted onto the annular metal frame 8. The connecting tube 10 is fixedly inserted into the annular metal frame 8 and the second rubber sleeve 9. There are two rubber sealing rings 11, which are symmetrically fixedly installed on the inner wall of the second rubber sleeve 9. There are four sealing rubber rings 12, which are respectively fixedly installed on the inner ends of the two rubber sealing rings 11. In use, the second rubber sleeve 9 on the second sealing element 2 can be fixedly connected to the bearing housing. When the rotating shaft 3 rotates, the rotating shaft 3 will rotate the first sealing element 1, while the second sealing element 2 will not rotate.

[0022] Finally, by setting up a sealing assembly consisting of a first seal 1 and a second seal 2, and connecting the second seal 2 to the air supply equipment, a high air pressure can be maintained inside the first seal 1 and the second seal 2. Under the action of this air pressure, the annular sealing rubber 6 is tightly fitted with the rubber sealing ring 11 and the sealing rubber ring 12, thereby blocking steam and preventing steam from entering the bearing housing, and ultimately preventing water from entering the bearing housing oil.

[0023] Furthermore, the metal base ring 4 and the first rubber sleeve 5 on the first sealing element 1 are fixedly connected. The first rubber sleeve 5 is also fixedly connected to the rotating shaft 3. The cross-section of the annular sealing rubber element 6 on the first sealing element 1 is a U-shaped structure with the opening facing outwards. Two annular sealing grooves 7 are opened at the outer ends of the two side walls of the annular sealing rubber element 6. The bottom wall of the annular sealing rubber element 6 is fixedly connected to the first rubber sleeve 5. The second sealing element 2 is rotatably connected to the first sealing element 1. The second sealing element 2 is located outside the first rubber sleeve 5 and is also sleeved on the outside of the annular sealing rubber element 6. The annular metal frame 8 and the second rubber sleeve 9 on the second sealing element 2 are fixedly connected. The cross-section of the annular metal frame 8 and the second rubber sleeve 9 are both U-shaped structures with the opening facing inwards. The annular metal frame 8 and the second rubber sleeve 9 are provided with connecting insertion holes 13. The bottom walls of the annular metal frame 8 and the second rubber sleeve 9 are penetrated both inside and outside. The connecting tube 10 is fixedly inserted into the connecting hole 13. The connecting tube 10 is connected to the gas supply equipment through a pipe. The two rubber sealing rings 11 on the second sealing element 2 are respectively fixedly installed on the inner ends of the two side walls of the second rubber sleeve 9, and the two rubber sealing rings 11 are respectively located on both sides of the annular sealing rubber element 6. The sealing rubber ring 12 is embedded in the annular sealing groove 7. During operation, the gas supply equipment fills the first sealing element 1 and the second sealing element 2 with air through the pipe, so that the first sealing element 1 and the second sealing element 2 maintain a high air pressure. This pressure needs to be greater than the external steam pressure. Under this pressure, the annular sealing rubber element 6, the rubber sealing ring 11, and the sealing rubber ring 12 will fit tightly together, which can effectively prevent steam from entering the bearing box and prevent water from entering the bearing box.

[0024] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A device for preventing water ingress into steam turbine oil, characterized in that: The first sealing element (1) is fixedly sleeved on the rotating shaft (3). The first sealing element (1) is composed of a metal base ring (4), a first rubber sleeve (5), and an annular sealing rubber element (6). The first rubber sleeve (5) is sleeved on the metal base ring (4). The annular sealing rubber element (6) is fixedly installed on the outer wall of the first rubber sleeve (5). A second sealing element (2) is movably installed on the first sealing element (1). The second sealing element (2) is composed of an annular metal frame (8), a second rubber sleeve (9), a connecting tube (10), a rubber sealing ring (11), and a sealing rubber ring (12). The second rubber sleeve (9) is sleeved on the annular metal frame (8). The connecting tube (10) is fixedly inserted into the annular metal frame (8) and the second rubber sleeve (9). There are two rubber sealing rings (11) that are symmetrically fixedly installed on the inner wall of the second rubber sleeve (9). There are four sealing rubber rings (12) that are respectively fixedly installed on the inner ends of the two rubber sealing rings (11).

2. The turbine oil anti-water ingress device according to claim 1, characterized in that: The metal base ring (4) and the first rubber sleeve (5) on the first seal (1) are fixedly connected, and the first rubber sleeve (5) is also fixedly connected to the rotating shaft (3).

3. The turbine oil anti-water ingress device according to claim 2, characterized in that: The cross-section of the annular sealing rubber component (6) on the first sealing component (1) is a U-shaped structure with the opening facing outward. Two annular sealing grooves (7) are opened at the outer ends of the two side walls of the annular sealing rubber component (6). The bottom wall of the annular sealing rubber component (6) is fixedly connected to the first rubber sleeve (5).

4. The turbine oil anti-water ingress device according to claim 3, characterized in that: The second seal (2) is rotatably connected to the first seal (1). The second seal (2) is located on the outside of the first rubber sleeve (5) and is also sleeved on the outside of the annular sealing rubber part (6).

5. A turbine oil anti-water ingress device according to claim 4, characterized in that: The annular metal frame (8) and the second rubber sleeve (9) on the second sealing element (2) are fixedly connected. The cross-section of the annular metal frame (8) and the second rubber sleeve (9) is a U-shaped structure with the opening facing inward. The annular metal frame (8) and the second rubber sleeve (9) are provided with a connecting insertion hole (13). The connecting insertion hole (13) penetrates the bottom wall of the annular metal frame (8) and the second rubber sleeve (9) through the inside and outside. The connecting tube (10) is fixedly inserted into the connecting insertion hole (13). The connecting tube (10) is connected to the gas supply equipment through a pipe.

6. A turbine oil anti-water ingress device according to claim 5, characterized in that: The two rubber sealing rings (11) on the second sealing member (2) are fixedly installed on the inner ends of the two side walls of the second rubber sleeve (9), and the two rubber sealing rings (11) are located on both sides of the annular sealing rubber member (6), and the sealing rubber ring (12) is embedded in the annular sealing groove (7).

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