Compressor turbine oil seal sealing isolation structure

Abstract

The utility model relates to the field of sealing devices, in particular to a compressor turbine oil seal sealing isolation structure which comprises a crude oil seal body, an oil seal ring is arranged on one face, facing the steam side, of the crude oil seal body, and a gas baffle is arranged on one side, deviating from the crude oil seal body, of the oil seal ring. First sealing teeth are arranged on the inner wall of the oil seal ring and arranged on the side, close to the crude oil seal body, of the oil seal ring. Second sealing teeth are arranged on the inner wall of the oil seal ring and arranged on the side, away from the crude oil seal body, of the oil seal ring. The oil seal has the effects of improving the sealing performance of the oil seal, preventing steam from entering the bearing box and delaying the moisture rise of lubricating oil in the bearing box.

Description

Technical Field

[0001] The utility model relates to the field of sealing devices, in particular to a compressor turbine oil seal sealing isolation structure. Background Art

[0002] Oil seal is the customary name for general seals, that is, lubricating oil seals. They are used to seal mechanical components of grease and isolate the parts that need lubrication in the transmission components from the output components to prevent the lubricating oil from leaking.

[0003] During the operation of the steam engine, one side of the oil seal is the bearing box, which contains lubricating oil, and the other side is steam. The oil seal seals the bearing box to prevent the leakage of lubricating oil, and also needs to prevent steam from entering the bearing box. Due to the friction between the inner wall of the oil seal and the rotor, after a long period of operation, the oil seal's sealing performance is reduced due to wear and aging, which leads to lubricating oil leakage; there is also a situation where steam enters the bearing box through the gap between the turbine oil seal and the rotor, which leads to an increase in the water content of the lubricating oil in the bearing box, further reducing the quality, viscosity and oil film stiffness of the lubricating oil. Utility Model Content

[0004] In order to improve the sealing performance of the oil seal, prevent steam from entering the bearing box, and delay the increase of water content in the lubricating oil in the bearing box, the utility model provides a compressor turbine oil seal sealing isolation structure.

[0005] The utility model provides a compressor turbine oil seal sealing isolation structure, which adopts the following technical solutions:

[0006] A compressor turbine oil seal sealing isolation structure comprises a crude oil seal body, wherein the crude oil seal body is provided with an oil seal ring on one side facing the steam side, and an air baffle is provided on the side of the oil seal ring facing away from the crude oil seal body.

[0007] In a specific possible implementation manner, a first sealing tooth is provided on the inner wall of the oil seal ring, and the first sealing tooth is arranged on a side of the oil seal ring close to the crude oil seal body.

[0008] In a specific possible implementation manner, a second sealing tooth is provided on the inner wall of the oil seal ring, and the second sealing tooth is arranged on a side of the oil seal ring away from the crude oil seal body.

[0009] In a specific implementation manner, at least two second sealing teeth are provided at intervals along the axial direction of the oil seal ring.

[0010] In a specific possible implementation scheme, a connecting plate is provided on the outer wall of the oil sealing ring, an air passage is opened on the connecting plate, a groove connected to the connecting plate is opened on the outer wall of the oil sealing ring, and a vent hole connecting the groove and the gap between the oil sealing ring and the rotor is opened on the oil sealing ring.

[0011] In a specific possible implementation manner, bolts are provided on the connecting plate, and the air baffle plate and the crude oil seal are connected to the connecting plate via the bolts.

[0012] In a specific possible implementation manner, the coupling plate is provided with a connecting tube communicating with the air passage.

[0013] In a specific possible implementation manner, the air outlet of the vent hole is arranged to be inclined toward the first sealing tooth, and the angle between the axis of the vent hole and the vertical direction is a, and 0°<a<60°.

[0014] In summary, the present invention includes at least one of the following beneficial technical effects:

[0015] 1. The air baffle can block the steam, reduce the steam flow to the gap between the oil seal ring and the rotor, and then block the steam from entering the bearing box, delaying the increase of water content in the lubricating oil in the bearing box.

[0016] 2. The first sealing teeth and the second sealing teeth seal the gap between the oil seal ring and the rotor, thereby improving the blocking effect on lubricating oil and steam, improving the sealing performance of the oil seal ring, blocking steam from entering the bearing box, and delaying the increase of water content in the lubricating oil in the bearing box.

[0017] 3. Sealing gas can flow into the gap between the oil seal ring and the rotor through the air passage and the vent hole. The sealing gas applies resistance to the lubricating oil to prevent the leakage of the lubricating oil. At the same time, it applies resistance to the steam to prevent the steam from flowing into the bearing box, thereby improving the sealing performance of the oil seal ring and effectively delaying the increase of water content in the lubricating oil in the bearing box. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure.

[0019] Figure 2 It is a schematic diagram showing the orientation of the vent holes.

[0020] Explanation of the reference numerals: 1. crude oil seal; 2. oil seal ring; 3. bolt; 4. air baffle; 5. first sealing tooth; 6. second sealing tooth; 7. vent hole; 8. connecting plate; 9. groove; 10. connecting pipe. DETAILED DESCRIPTION

[0021] The following is combined with Figure 1-2 The utility model is described in further detail.

[0022] Reference Figure 1 The compressor turbine oil seal sealing isolation structure includes a crude oil seal body 1, which is sleeved on the rotor. The crude oil seal body 1 is provided with an oil seal ring 2 on the side facing the steam, and the oil seal ring 2 is fixed on the side wall of the crude oil seal body 1. A first ring-shaped sealing tooth 5 is fixed on the inner wall of the oil seal ring 2, and the first sealing tooth 5 is arranged on the side of the oil seal ring 2 close to the crude oil seal body 1. The first sealing tooth 5 blocks the lubricating oil leaking from the lubricating oil side to the oil seal ring 2, thereby improving the sealing performance of the oil seal ring 2 and effectively reducing the leakage of the lubricating oil.

[0023] Reference Figure 1 Two second sealing teeth 6 are fixed on the inner wall of the oil seal ring 2. The second sealing teeth 6 are ring-shaped and are arranged at intervals along the axial direction of the oil seal ring 2. The two second sealing teeth 6 block the flow of steam into the oil seal ring 2, further improving the sealing performance of the oil seal ring 2 and effectively alleviating the problem of increased water content in the lubricating oil.

[0024] Reference Figure 1 A coupling plate 8 is provided on the outer wall of the oil seal ring 2, a groove 9 is provided on the side of the oil seal ring 2 facing the coupling plate 8, an air passage (not shown in the figure) communicating with the groove 9 is provided on the coupling plate 8, and a vent hole 7 communicating with the groove 9 and the gap between the oil seal ring 2 and the rotor is provided on the oil seal ring 2. By arranging a connecting pipe 10 on the coupling plate 8 and connecting the connecting pipe 10 to the air source, sealing gas is introduced into the gap between the oil seal ring 2 and the rotor, that is, the gap between the first sealing teeth 5 and the second sealing teeth 6, and the sealing gas is used to further block the lubricating oil and steam, thereby further improving the sealing effect of the oil seal ring 2 and further reducing the leakage of the lubricating oil and the flow of steam into the steam box.

[0025] refer to Figure 1 and Figure 2 The air outlet of the vent hole 7 is arranged toward the first sealing tooth 5, and the angle between the axis of the vent hole 7 and the vertical direction is a, 0°<a<60°. Since the lubricating oil is a liquid, the pressure requirement for sealing it is higher, but at the same time, it is also necessary to take into account the steam side to seal the steam. Therefore, it is necessary to blow the sealing gas to the first sealing tooth 5 to assist the first sealing tooth 5 to block the lubricating oil and improve the effect of preventing the lubricating oil from leaking. At the same time, the sealing gas can also assist the second sealing tooth 6 to seal the steam and improve the steam blocking effect.

[0026] Reference Figure 1The side of the connecting plate 8 facing away from the crude oil seal body 1 is provided with an air baffle 4, and bolts 3 are passed through the connecting plate. The crude oil seal body 1, the connecting plate 8 and the air baffle 4 are fixed by bolts 3. The air baffle 4 can block the steam from flowing toward the oil seal ring 2, thereby reducing the steam flowing toward the second sealing teeth 6, further reducing the steam entering the bearing box, and greatly delaying the increase of water content in the lubricating oil in the bearing box.

[0027] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A compressor turbine oil seal sealing isolation structure, comprising a crude oil seal body (1), characterized in that: An oil seal ring (2) is provided on the side of the crude oil seal body (1) facing the steam side, and an air baffle (4) is provided on the side of the oil seal ring (2) facing away from the crude oil seal body (1).

2. The compressor turbine oil seal sealing isolation structure according to claim 1, characterized in that: A first sealing tooth (5) is provided on the inner wall of the oil seal ring (2), and the first sealing tooth (5) is arranged on a side of the oil seal ring (2) close to the crude oil seal body (1).

3. The compressor turbine oil seal sealing isolation structure according to claim 1, characterized in that: The inner wall of the oil seal ring (2) is provided with a second sealing tooth (6), and the second sealing tooth (6) is arranged on a side of the oil seal ring (2) away from the crude oil seal body (1).

4. The compressor turbine oil seal sealing isolation structure according to claim 3, characterized in that: At least two of the second sealing teeth (6) are arranged at intervals along the axial direction of the oil seal ring (2).

5. The compressor turbine oil seal sealing isolation structure according to claim 1, characterized in that: A connecting plate (8) is provided on the outer wall of the oil seal ring (2), an air passage is provided on the connecting plate (8), a groove (9) communicating with the connecting plate (8) is provided on the outer wall of the oil seal ring (2), and an air vent (7) communicating with the groove (9) and the gap between the oil seal ring (2) and the rotor is provided on the oil seal ring (2).

6. The compressor turbine oil seal sealing isolation structure according to claim 5, characterized in that: The connecting plate (8) is provided with bolts (3), and the air baffle (4) and the crude oil sealing body (1) are connected to the connecting plate (8) via the bolts (3).

7. The compressor turbine oil seal sealing isolation structure according to claim 5, characterized in that: The connection plate (8) is provided with a connection pipe (10) which is in communication with the air passage.

8. The compressor turbine oil seal sealing isolation structure according to claim 5, characterized in that: The air outlet of the vent hole (7) is arranged to be inclined toward the first sealing tooth (5), and the angle between the axis of the vent hole (7) and the vertical direction is a, and 0°<a<60°.

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