Independent turbocharger with double sealing rings

Abstract

The utility model discloses an independent turbocharger with double sealing rings, which comprises a gas compressor shell, a turbine shell and a connector for connecting the gas compressor shell and the turbine shell, a rotating shaft is rotatably connected in the connector through a bearing, a circular groove is arranged in the end face of the connector, and a sealing ring is arranged in the circular groove. A sealing assembly is arranged in the circular groove; the sealing assembly comprises a first sealing disc and a second sealing disc which are independent of each other, the sealing effect can be improved, and the service life of the sealing device is prolonged. The first sealing disc and the second sealing disc abut against each other, the positions of the first sealing disc and the second sealing disc are fixed through the supporting ring and the clamping spring, and therefore the first sealing disc and the second sealing disc are not prone to moving and high in stability. Labyrinth structures are formed between the first sealing disc and the sealing sleeve and between the second sealing disc and the sealing sleeve, labyrinth paths are added through the design of the inner rings on the sealing discs and the inner disc body of the sealing sleeve, and the oil sealing effect is effectively achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of turbochargers, in particular to a double-sealing-ring independent turbocharger. Background Art

[0002] A turbocharger is a device that uses the energy of the exhaust gas discharged from an engine to drive a turbine to do work, drives a coaxial compressor impeller to rotate, and compresses air to increase the intake air volume of the engine.

[0003] As Figure 3 shown, currently, the seal at the rotating shaft in a turbocharger is generally only a single sealing ring, and two sealing rings attached to the rotating shaft are arranged inside it. Such a simple sealing treatment has a poor effect and is prone to oil leakage at the rotating shaft. Therefore, it needs to be improved to enhance the sealing effect and service life of the turbocharger. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a double-sealing-ring independent turbocharger to solve the problems mentioned in the above background art.

[0005] The utility model provides the following technical solution: A double-sealing-ring independent turbocharger includes a compressor housing, a turbine housing, and a connecting body connecting the compressor housing and the turbine housing. A rotating shaft is rotatably connected in the connecting body through a bearing, and impellers and turbines are respectively installed at both ends of the rotating shaft extending into the compressor housing and the turbine housing. A circular groove is provided in the end face of the connecting body close to the impeller, and a sealing assembly is arranged in the circular groove;

[0006] The sealing assembly includes two sealing sleeves sleeved outside the rotating shaft and distributed up and down. A first ring groove is formed in the sealing sleeve, and a first sealing ring is installed in the first ring groove. A first sealing disc and a second sealing disc are also provided in the circular groove and distributed up and down. The inner curved surfaces of the first sealing disc and the second sealing disc are respectively attached to the two first sealing rings, and the outer curved surfaces of the first sealing disc and the second sealing disc are attached to the curved surface of the circular groove.

[0007] Preferably, inner rings are integrally formed on the lower sides of the first sealing disc and the second sealing disc, and the inner curved surfaces of the inner rings are coplanar with the inner curved surfaces of the first sealing disc and the second sealing disc.

[0008] Preferably, the sealing sleeve includes a barrel part and a disc part, and the barrel part and the disc part are distributed up and down so that the sealing sleeve forms an inverted T shape. The distance between the disc part and the lower end of the inner ring is between 0.1 - 0.25 mm.

[0009] Preferably, an outer ring is integrally formed on the lower side surface of the first sealing disc. The outer curved surface of the outer ring is coplanar with the outer curved surface of the first sealing disc, and the lower end of the outer ring abuts against the second sealing disc.

[0010] Preferably, a second annular groove is provided in the curved surface of the circular groove, and a snap ring is clamped in the second annular groove. The snap ring presses on the upper end of the first sealing disc.

[0011] Preferably, a third annular groove is provided in the outer curved surface of the outer ring, and a second sealing ring that adheres to the curved surface of the circular groove is installed in the third annular groove.

[0012] Preferably, a supporting ring is integrally formed on the curved surface of the circular groove, and the supporting ring abuts against the lower side of the second sealing disc.

[0013] Preferably, the first sealing ring is a ceramic sealing ring.

[0014] The utility model provides a double-sealing-ring independent turbocharger, which has the following beneficial effects:

[0015] In the utility model, the first sealing disc and the second sealing disc are independent of each other, which can improve the sealing effect and extend the service life of the utility model.

[0016] In the utility model, the first sealing disc and the second sealing disc abut against each other, and their positions are fixed by the supporting ring and the snap ring. This makes it difficult for the first sealing disc and the second sealing disc to move around, and they have high stability.

[0017] A labyrinth structure is formed between the first sealing disc and the second sealing disc of the utility model and the sealing sleeve. And the labyrinth path is increased through the design of the inner ring on the sealing disc and the inner disc body of the sealing sleeve, which effectively plays the role of sealing oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram inside the utility model;

[0019] Figure 2 is Figure 2 an enlarged schematic diagram of part A in

[0020] Figure 3 is a schematic structural diagram inside the existing turbocharger mentioned in the background art.

[0021] In the figure:

[0022] 11. Compressor housing; 12. Turbine housing; 13. Connecting body; 14. Rotating shaft; 15. Impeller; 16. Turbine; 17. Round groove; 18. Sealing sleeve; 19. First sealing disc; 20. Second sealing disc; 22. Inner ring; 23. First sealing ring; 24. Outer ring; 25. Snap ring; 26. Second sealing ring; 27. Support ring; 81. Barrel part; 82. Disc part; 91. Bush; 92. Gas seal cover; 93. Bearing. Detailed implementation manners

[0023] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation to the present utility model.

[0024] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0025] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0026] In the present utility model, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] Refer to Figures 1 - 3, according to an embodiment of a double-sealing-ring independent turbocharger of the present utility model, it includes a compressor housing 11, a turbine housing 12, and a connecting body 13 connecting the compressor housing 11 and the turbine housing 12. A rotating shaft 14 is rotatably connected in the connecting body 13 through a bearing 93, and impellers 15 and turbines 16 are respectively installed at both ends of the rotating shaft 14 extending into the compressor housing 11 and the turbine housing 12. A circular groove 17 is provided in the end face of the connecting body 13 close to the impeller 15, and a sealing assembly is provided in the circular groove 17 to prevent the lubricating oil acting on the bearing 93 in the connecting body 13 from overflowing.

[0028] In this embodiment, the sealing assembly includes two sealing sleeves 18 sleeved outside the rotating shaft 14 and distributed up and down. A first sealing ring 23 is provided on the curved surfaces of the two sealing sleeves 18. A first sealing disc 19 and a second sealing disc 20 are also provided in the circular groove 17 and distributed up and down. The inner curved surfaces of the first sealing disc 19 and the second sealing disc 20 are respectively attached to the first sealing rings 23 on the two sealing sleeves 18, and the outer curved surfaces of the first sealing disc 19 and the second sealing disc 20 are attached to the curved surface of the circular groove 17. Through the design of the double-sealing discs, the sealing performance of the double-sealing-ring independent turbocharger is improved, effectively preventing oil from overflowing. In addition, a shaft sleeve 91 is provided between the bearing 93 and the sealing sleeve 18, and a gas sealing cover 92 is provided on the step of the shaft sleeve 91. The gas sealing cover 92 and the oil baffle plate thereon are prior arts and will not be elaborated here.

[0029] In order to increase the contact area between the first sealing disc 19 and the second sealing disc 20 and the sealing sleeve 18, a labyrinth structure is added to further improve the sealing effect. Inner rings 22 are integrally formed on the lower sides of the first sealing disc 19 and the second sealing disc 20. The inner curved surfaces of the inner rings 22 are coplanar with the inner curved surfaces of the first sealing disc 19 and the second sealing disc 20 and are all close to the curved surface of the sealing sleeve 18.

[0030] In the second embodiment of the double-sealing-ring independent turbocharger, the first sealing ring 23 is attached to the inner ring 22.

[0031] In the third embodiment of the described dual-sealing-ring independent turbocharger, in order to increase the path of the labyrinth structure and further improve the sealing effect, the sealing sleeve 18 includes a barrel portion 81 and a disc portion 82. The barrel portion 81 and the disc portion 82 are distributed vertically so that the sealing sleeve 18 forms a T shape. The outer curved surface of the barrel portion 81 is close to the first sealing disc 19, the second sealing disc 20, and the inner ring 22 to form a first gap, and the disc portion 82 is close to the lower end of the disc portion 82 to form a second gap. Both the first gap and the second gap are between 0.1 - 0.25 mm, effectively playing the role of sealing oil.

[0032] In order to keep the overall position of the first sealing disc 19 and the second sealing disc 20 stable, a second annular groove is provided in the curved surface of the circular groove 17, and a snap ring 25 is clamped in the second annular groove. The snap ring 25 presses on the upper end of the first sealing disc 19. A supporting ring 27 is integrally formed on the curved surface of the circular groove 17, and the supporting ring 27 abuts against the lower side of the second sealing disc 20, that is, the first sealing disc 19 and the second sealing disc 20 abut against each other vertically and are pressed into the circular groove 17 by the snap ring 25 and the supporting ring 27.

[0033] In order to maintain the relative positional relationship between the first sealing disc 19 and the second sealing disc 20 and prevent the first sealing disc 19 and the second sealing disc 20 from moving up and down, an outer ring 24 is integrally formed on the lower side surface of the first sealing disc 19. The outer curved surface of the outer ring 24 is coplanar with the outer curved surface of the first sealing disc 19, and the lower end of the outer ring 24 abuts against the second sealing disc 20.

[0034] In addition, in order to achieve the sealing effect on the outside, a third annular groove is provided in the outer curved surface of the outer ring 24, and a second sealing ring 26 that adheres to the curved surface of the circular groove 17 is installed in the third annular groove. In this embodiment, the first sealing ring 23 is a ceramic sealing ring, and the second sealing ring 26 is an O-ring made of rubber.

[0035] It should be noted that an oil inlet hole and an oil outlet hole are provided in the connecting body 13 so that the bearing 93 connected to the rotating shaft 14 can be lubricated in time.

[0036] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present invention are covered by the patent scope of the present invention.

Claims

1. A double-sealing-ring independent turbocharger, comprising a compressor housing (11), a turbine housing (12) and a connecting body (13) connecting the compressor housing (11) and the turbine housing (12), characterized in that: A rotating shaft (14) is rotatably connected inside the connecting body (13) through a bearing (93), and impellers (15) and turbines (16) are respectively installed at both ends of the rotating shaft (14) extending into the compressor housing (11) and the turbine housing (12). A circular groove (17) is provided in the end face of the connecting body (13) close to the impeller (15), and a sealing assembly is provided in the circular groove (17). The sealing assembly includes two sealing sleeves (18) sleeved outside the rotating shaft (14) and distributed up and down. A first annular groove is formed in the sealing sleeve (18), and a first sealing ring (23) is installed in the first annular groove. A first sealing disc (19) and a second sealing disc (20) are also provided in the circular groove (17) and distributed up and down. The inner curved surfaces of the first sealing disc (19) and the second sealing disc (20) are respectively attached to the two first sealing rings (23), and the outer curved surfaces of the first sealing disc (19) and the second sealing disc (20) are attached to the curved surface of the circular groove (17).

2. The double-sealing-ring independent turbocharger according to claim 1, wherein: Inner rings (22) are integrally formed on the lower sides of the first sealing disc (19) and the second sealing disc (20), and the inner curved surfaces of the inner rings (22) are coplanar with the inner curved surfaces of the first sealing disc (19) and the second sealing disc (20).

3. A double-sealing-ring independent turbocharger according to claim 2, characterized in that: The sealing sleeve (18) includes a barrel part (81) and a disc part (82), and the barrel part (81) and the disc part (82) are distributed up and down so that the sealing sleeve (18) forms an inverted T shape. The distance between the disc part (82) and the lower end of the inner ring (22) is between 0.1 - 0.25 mm.

4. A double-sealing-ring independent turbocharger according to claim 1, characterized in that: An outer ring (24) is integrally formed on the lower side of the first sealing disc (19), and the outer curved surface of the outer ring (24) is coplanar with the outer curved surface of the first sealing disc (19), and the lower end of the outer ring (24) abuts against the second sealing disc (20).

5. A double-sealing-ring independent turbocharger according to claim 4, characterized in that: A second annular groove is provided in the curved surface of the circular groove (17), and a snap ring (25) is snapped into the second annular groove, and the snap ring (25) presses on the upper end of the first sealing disc (19).

6. A double-sealing-ring independent turbocharger according to claim 4, characterized in that: A third annular groove is provided in the outer curved surface of the outer ring (24), and a second sealing ring (26) attached to the curved surface of the circular groove (17) is installed in the third annular groove.

7. A double-sealing-ring independent turbocharger according to claim 1, characterized in that: A support ring (27) is integrally formed on the curved surface of the circular groove (17), and the support ring (27) abuts against the lower side of the second sealing disc (20).

8. A double-sealing-ring independent turbocharger according to claim 3, characterized in that: The first sealing ring (23) is a ceramic sealing ring.

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