Double-seal oil shield structure

Abstract

The utility model relates to the technical field of water turbine sealing, in particular to a double-seal oil retainer structure which comprises a sealing assembly, a sealing ring, an outer ring follower ring arranged on the top of the sealing ring and an inner ring follower ring arranged on the inner side of the outer ring follower ring, and the sealing assembly is sealed through the sealing ring. The auxiliary assembly is arranged at the top of the sealing assembly, a layer of brush is additionally arranged on the upper portion of the auxiliary assembly to isolate carbon powder and protect an oil groove, and an air-tight sealing cavity is formed in the inner side of the sealing ring and connected with a rotor lower wind shield through an air-tight sealing pipeline; during operation, high-pressure air in the lower wind shield flows into the sealing cavity of the upper sealing cover through the air-tight sealing pipe, oil mist is prevented from leaking outwards, and an oil mist cavity is formed in the top of the air-tight sealing cavity. The utility model has the beneficial effects that in the running process of the water turbine, even if the water turbine shakes, oil mist can be effectively prevented from leaking out under the action of the outer ring elastic piece and the inner ring elastic piece.

Description

Technical Field

[0001] The utility model relates to the technical field of water turbine sealing, in particular to a double-sealing oil baffle structure. Background Art

[0002] Oil mist in hydro-turbine generators is a major equipment defect that has a very serious impact on the operating status of the unit. The oil block seal of the hydro-turbine generator adopts a follower seal. The oil block follower seal is a technology used to seal the oil mist part of the three bearing shafts of the hydro-turbine generator. In actual operation, the follower seal and the shaft collar wear for a long time, resulting in poor sealing, causing a large amount of oil mist to leak out, which has affected the overall appearance of the unit.

[0003] When the vibration and swing of the turbine are large during operation, the tracking performance of the rubber water stop ring is poor, which will cause oil mist to leak out. In actual operation, long-term wear of the dynamic seal and the shaft collar will lead to loose sealing, which will also cause a large amount of oil mist to leak out. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract and title of the utility model to avoid obscuring the purpose of this section, the abstract and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0005] In view of the technical problem in the above-mentioned prior art that when the vibration and swing of the turbine during operation are large, the tracking performance of the rubber water stop ring is poor, which may cause oil mist leakage, the present utility model is proposed.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: a double-sealed oil baffle structure, which includes a sealing assembly, including a sealing ring, an outer ring follower ring arranged on the top of the sealing ring, and an inner ring follower ring arranged on the inner side of the outer ring follower ring; and an auxiliary assembly.

[0007] As a preferred solution of the double-sealed oil baffle structure of the present invention, an airtight sealing cavity is provided on the inner side of the sealing ring, and an oil mist cavity is provided on the top of the airtight sealing cavity.

[0008] As a preferred solution of the double-sealed oil baffle structure of the utility model, a labyrinth groove is provided on the side of the sealing ring, an outer follower groove is provided on the top of the labyrinth groove, and the outer follower ring is arranged inside the outer follower groove.

[0009] As a preferred solution of the double-sealed oil baffle structure of the present invention, an inner follower groove is provided on the side of the outer follower groove, the inner follower groove is opened on the outer wall of the shaft neck, and the inner follower ring is provided inside the inner follower groove.

[0010] As a preferred solution of the double-sealed oil baffle structure of the present invention, the outer follower ring includes an outer follower ring arranged on the inner wall of the outer follower groove, and an outer ring elastic member is arranged on the side surface of the outer follower ring.

[0011] As a preferred solution of the double-sealed oil baffle structure of the utility model, the outer follower ring includes an inner rubber ring, the side of the inner rubber ring is provided with a toothed groove, the top and bottom of the inner rubber ring are provided with outer rubber rings, and the side of the outer rubber ring is in contact with the inner wall of the outer follower groove.

[0012] As a preferred solution of the double-sealed oil baffle structure of the present invention, the material of the outer rubber ring is relatively hard rubber, and the material of the inner rubber ring is relatively soft rubber.

[0013] As a preferred solution of the double-sealed oil baffle structure of the utility model, the inner follower ring includes an inner follower ring arranged on the inner wall of the inner follower groove, and an inner ring elastic member is arranged on the side surface of the inner follower ring.

[0014] As a preferred solution of the double-sealed oil baffle structure of the utility model, the inner follower ring includes a side rubber ring, a soft rubber ring is provided on the side surface of the side rubber ring, and a tooth-shaped groove is opened on the side surface of the soft rubber ring.

[0015] As a preferred solution of the double-sealed oil baffle structure of the utility model, the auxiliary component includes a brush pressure plate arranged on the top of the sealing ring, a positioning screw is provided on the top of the brush pressure plate, a receiving groove is opened on the side of the brush pressure plate, and a brush is provided inside the receiving groove.

[0016] The double-sealed oil baffle structure of the present invention has the beneficial effect that, during the operation of the turbine, even if vibration occurs, the outer ring elastic member and the inner ring elastic member can effectively prevent the oil mist from leaking out. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] Figure 1 It is a cross-sectional schematic diagram of the present invention.

[0019] Figure 2 It is a schematic diagram of the overall structure of the present utility model.

[0020] Figure 3 It is a partial cross-sectional schematic diagram of the present invention.

[0021] Figure 4 This is a structural diagram of the outer follower ring in the present utility model.

[0022] Figure 5 This is a schematic structural diagram of the outer follower coil in the present invention.

[0023] Figure 6 This is a structural diagram of the inner follower ring in the present invention.

[0024] Figure 7 This is a schematic structural diagram of the inner follower coil in the present invention. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0028] Example 1, with reference to Figure 1 , is the first embodiment of the utility model, which provides a double-sealed oil baffle structure, including a sealing assembly 100, including a sealing ring 101, an outer ring follower ring 106 arranged on the top of the sealing ring 101, and an inner ring follower ring 107 arranged on the inner side of the outer ring follower ring 106. The sealing assembly 100 uses the sealing ring 101 for sealing, and the outer ring follower ring 106 cooperates with the inner ring follower ring 107 to seal the inside of the sealing ring 101 to prevent oil mist leakage; and an auxiliary assembly 200. The auxiliary assembly 200 is arranged on the top of the sealing assembly 100, and a layer of brush is added on the upper part to isolate carbon powder and protect the oil tank.

[0029] Furthermore, an airtight sealing chamber 102 is opened on the inner side of the sealing ring 101, and the airtight sealing chamber 102 is connected to the lower wind shield of the rotor through an airtight sealing pipeline. During operation, the high-pressure air in the lower wind shield flows into the sealing chamber of the upper sealing cover through the airtight sealing pipe, blocking the oil mist from leaking out. An oil mist chamber 103 is opened on the top of the airtight sealing chamber 102, and the oil mist chamber 103 can directly extract the oil and gas mixture. The mixed gas is deposited in the oil mist absorption box and is discharged regularly by maintenance personnel.

[0030] Usage process: The sealing component 100 uses the sealing ring 101 for sealing, and the outer ring follower ring 106 cooperates with the inner ring follower ring 107 to seal the inside of the sealing ring 101 to prevent oil mist leakage. The auxiliary component 200 is set on the top of the sealing component 100, and a layer of brush is added on the upper part to isolate carbon powder and protect the oil tank.

[0031] Example 2, reference Figures 1 to 7 , which is the second embodiment of the present utility model. Different from the previous embodiment, a labyrinth groove 104 is provided on the side of the sealing ring 101. The labyrinth groove 104 can reduce oil leakage. An outer follower groove 105 is provided on the top of the labyrinth groove 104. An outer follower ring 106 is arranged inside the outer follower groove 105. An inner follower groove 108 is provided on the side of the outer follower groove 105. The inner follower groove 108 is opened on the outer wall of the shaft neck, and the inner follower ring 107 is arranged inside the inner follower groove 108.

[0032] Furthermore, the outer follower ring 106 includes an outer follower ring 106a arranged on the inner wall of the outer follower groove 105, and an outer ring elastic member 106b is provided on the side of the outer follower ring 106a. The outer follower ring 106a is fixed inside the outer follower groove 105, and the side of the outer ring elastic member 106b contacts the inner wall of the outer follower groove 105. The outer ring elastic member 106b is in a compressed state. The outer follower ring 106a includes an inner rubber ring 106a-1, and a toothed groove is provided on the side of the inner rubber ring 106a-1. Outer rubber rings 106a-2 are provided on the top and bottom of the inner rubber ring 106a-1. The side of the outer rubber ring 106a-2 contacts the inner wall of the outer follower groove 105. The material of the outer rubber ring 106a-2 is relatively hard rubber, and the material of the inner rubber ring 106a-1 is relatively soft rubber.

[0033] Furthermore, the inner follower ring 107 includes an inner follower ring 107a arranged on the inner wall of the inner follower groove 108, and an inner ring elastic member 107b is provided on the side of the inner follower ring 107a. The inner follower ring 107a is fixed inside the outer follower groove 105, and the side of the inner ring elastic member 107b contacts the inner wall of the inner follower groove 108. The inner ring elastic member 107b is in a compressed state. The inner follower ring 107a includes a side rubber ring 107a-1, and a soft rubber ring 107a-2 is provided on the side of the side rubber ring 107a-1. The side of the soft rubber ring 107a-2 is provided with a The toothed grooves, the inner follower ring 107 and the outer follower ring 106 are in the same horizontal plane. During the operation of the turbine, even if jitter occurs, under the action of the outer elastic member 106b and the inner elastic member 107b, the inner follower ring 107 and the outer follower ring 106 will be tightly attached together, effectively preventing the oil mist from leaking out. At the same time, the toothed grooves arranged on the outer sides of the inner rubber ring 106a-1 and the soft rubber ring 107a-2 are engaged and squeezed together, making the contact between the inner follower ring 107 and the outer follower ring 106 closer and not easily separated, thereby better preventing the oil mist from leaking out.

[0034] Usage process: A labyrinth groove 104 is provided on the side of the sealing ring 101, which can reduce oil leakage. The inner ring follower ring 107 and the outer ring follower ring 106 are in the same horizontal plane. During the operation of the turbine, even if shaking occurs, under the action of the outer ring elastic member 106b and the inner ring elastic member 107b, the inner ring follower ring 107 and the outer ring follower ring 106 will be tightly attached together, effectively preventing oil mist from leaking out. At the same time, the toothed grooves arranged on the outer sides of the inner rubber ring 106a-1 and the soft rubber ring 107a-2 are engaged and squeezed together, making the contact between the inner ring follower ring 107 and the outer ring follower ring 106 closer and not easily separated, thereby better preventing oil mist from leaking out.

[0035] Example 3, reference Figures 1 to 7 , which is the third embodiment of the present utility model. Different from the previous embodiment, the auxiliary component 200 includes a brush pressure plate 201 arranged on the top of the sealing ring 101, a positioning screw 202 is provided on the top of the brush pressure plate 201, and a receiving groove 203 is opened on the side of the brush pressure plate 201. A brush 204 is provided inside the receiving groove 203. Since a large amount of carbon powder in the slip ring chamber is easy to fall into the oil tank during operation, causing the turbine oil to deteriorate, adding a layer of brush on the upper part can better isolate the carbon powder and effectively protect the oil tank.

[0036] Usage process: Use the positioning screw 202 to fix the brush pressure plate 201 on the top of the sealing ring 101. Since there is a lot of carbon powder in the slip ring chamber during operation, it is easy to fall into the oil tank and cause the turbine oil to deteriorate. Adding a layer of brush on the top can better isolate the carbon powder and effectively protect the oil tank.

[0037] It is important to note that the construction and arrangement of the present application shown in a number of different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete elements can be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "means plus function" clause is intended to cover the structure of the execution function described herein, and is not only structurally equivalent but also an equivalent structure. Without departing from the scope of the present invention, other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0038] Additionally, in order to provide a concise description of example embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0039] It should be understood that in the development of any actual embodiment, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but for those of ordinary skill having the benefit of this disclosure, the development effort will be a routine task of design, fabrication, and production without undue experimentation.

[0040] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. A double-seal oil baffle structure, characterized by: include, A sealing assembly (100) comprises a sealing ring (101), an outer follower ring (106) disposed on the top of the sealing ring (101), and an inner follower ring (107) disposed inside the outer follower ring (106); and Auxiliary component (200).

2. The double-seal oil baffle structure according to claim 1, characterized in that: An airtight sealing cavity (102) is provided on the inner side of the sealing ring (101), and an oil mist cavity (103) is provided on the top of the airtight sealing cavity (102).

3. The double-seal oil baffle structure according to claim 2, characterized in that: A labyrinth groove (104) is provided on the side of the sealing ring (101), an outer follower groove (105) is provided on the top of the labyrinth groove (104), and the outer follower ring (106) is arranged inside the outer follower groove (105).

4. The double-seal oil baffle structure according to claim 3, characterized in that: An inner follower groove (108) is provided on the side surface of the outer follower groove (105), the inner follower groove (108) is opened on the outer wall of the journal, and the inner follower ring (107) is provided inside the inner follower groove (108).

5. The double-seal oil baffle structure according to claim 4, characterized in that: The outer follower ring (106) comprises an outer follower ring (106a) arranged on the inner wall of the outer follower groove (105), and an outer ring elastic member (106b) is arranged on the side surface of the outer follower ring (106a).

6. The double-seal oil baffle structure according to claim 5, characterized in that: The outer follower ring (106a) comprises an inner rubber ring (106a-1), a tooth-shaped groove is provided on the side surface of the inner rubber ring (106a-1), outer rubber rings (106a-2) are provided on the top and bottom of the inner rubber ring (106a-1), and the side surface of the outer rubber ring (106a-2) contacts the inner wall of the outer follower groove (105).

7. The double-seal oil baffle structure according to claim 6, characterized in that: The material of the outer rubber ring (106a-2) is relatively hard rubber, and the material of the inner rubber ring (106a-1) is relatively soft rubber.

8. The double-seal oil baffle structure according to claim 7, characterized in that: The inner follower ring (107) comprises an inner follower ring (107a) arranged on the inner wall of the inner follower groove (108), and an inner ring elastic member (107b) is arranged on the side surface of the inner follower ring (107a).

9. The double-seal oil baffle structure according to claim 8, characterized in that: The inner follower ring (107a) comprises a side rubber ring (107a-1), a soft rubber ring (107a-2) is provided on the side surface of the side rubber ring (107a-1), and a tooth-shaped groove is provided on the side surface of the soft rubber ring (107a-2).

10. The double-seal oil baffle structure according to claim 9, characterized in that: The auxiliary component (200) comprises a brush pressing plate (201) arranged on the top of the sealing ring (101), a positioning screw (202) is arranged on the top of the brush pressing plate (201), a receiving groove (203) is opened on the side of the brush pressing plate (201), and a brush (204) is arranged inside the receiving groove (203).

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