High-pressure sealing structure of turbocharger

Abstract

The utility model discloses a high-pressure sealing structure of a turbocharger, and particularly relates to the field of turbochargers, the high-pressure sealing structure of the turbocharger comprises a shell, a worm is coaxially arranged in the shell, a first shaft seal assembly is sleeved on the worm in the shell, a sealing gasket is arranged on one side of the first shaft seal assembly, and a second shaft seal assembly is arranged on the other side of the first shaft seal assembly. A gasket is arranged on one side of the sealing gasket, a spring is arranged on one side of the gasket, a second shaft seal assembly is arranged on one side of the spring, an end cover connected with the shell is connected to one side of the second shaft seal assembly in a pressing mode, and an oil cavity is formed between the first shaft seal assembly and the second shaft seal assembly. Friction generated between the worm and the inner ring of the sealing gasket when the worm rotates can be reduced, so that abrasion to the sealing gasket is reduced, the service life of the sealing gasket is prolonged, in the rotating process, when the sealing gasket is thinned, the spring can push and extrude the gasket to extrude the sealing gasket, gaps are avoided, sealing performance is guaranteed, and the service life of the worm is prolonged. Therefore, the sealing structure is suitable for high-pressure sealing.

Description

Technical Field

[0001] The utility model relates to the technical field of turbochargers, and more specifically, to a high-pressure sealing structure of a turbocharger. Background Art

[0002] A turbocharger is an air compressor that uses the inertia of exhaust gas from the engine to drive the turbine in the turbine chamber. The turbine in turn drives the coaxial impeller, which pressurizes the air delivered by the air filter duct and pressurizes it into the cylinder, thereby increasing the engine's output power.

[0003] The transmission of the turbine to drive the impeller depends on the turbine shaft. In order to enhance the long-term reliability of the turbine shaft, an intermediate body will be installed on the turbine shaft, and lubricating oil will be used in the intermediate body to reduce the friction of the turbine shaft during transmission. In order to prevent oil leakage, a turbine end sealing ring will be installed between the intermediate body and the shaft body near the turbine end to seal the oil.

[0004] However, the existing method of directly installing a sealing ring to seal the oil, firstly, when the turbine shaft rotates, friction with the sealing ring is generated, which is easy to cause wear, thereby causing the inner ring to become larger, and secondly, the surface of the sealing ring is worn and becomes thinner, thereby reducing the sealing performance. Therefore, a high-pressure sealing structure of a turbocharger is now proposed. Utility Model Content

[0005] In order to overcome the above defects of the prior art, the utility model provides a turbocharger high-pressure sealing structure to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a turbocharger high-pressure sealing structure, comprising a shell, a vortex rod is coaxially installed in the shell, a first shaft seal assembly is sleeved on the vortex rod inside the shell, a sealing gasket is arranged on one side of the first shaft seal assembly, a gasket is arranged on one side of the sealing gasket, a spring is arranged on one side of the gasket, a second shaft seal assembly is arranged on one side of the spring, and an end cover connected to the shell is crimped on one side of the second shaft seal assembly.

[0007] Preferably, an oil chamber is provided between the first shaft seal assembly and the second shaft seal assembly, an oil inlet is provided at the bottom end of the oil chamber, and an oil outlet is provided at the top end of the oil chamber.

[0008] Preferably, the structure of the first shaft seal assembly is the same as that of the second shaft seal assembly, the first shaft seal assembly comprises a bearing outer ring, a bearing inner ring and a connecting plate, the bearing outer ring is provided with a bearing inner ring, and the bearing inner ring is connected to the connecting plate.

[0009] Preferably, the sealing gasket is a rubber gasket, and the sealing gasket is sleeved on the worm shaft by deformation.

[0010] Preferably, the gasket is made of metal material, and the gasket is pressed on the sealing gasket.

[0011] Preferably, a rotary joint is provided on one side of the end cover, a screw groove is provided on the inner wall of one end of the shell, and the rotary joint is screwed to the shell through the screw groove.

[0012] Technical effects and advantages of the utility model:

[0013] 1. When the inner ring of the worm synchronous bearing rotates, the connecting plate can rotate with it, so that the sealing gasket fixed by the spring between the connecting plates can rotate with the worm, thereby reducing the friction between the worm and the inner ring of the sealing gasket when the worm rotates, thereby reducing the wear on the sealing gasket and increasing the service life of the sealing gasket. During the rotation process, when the sealing gasket becomes thinner, the spring can also push the gasket and squeeze the sealing gasket to avoid gaps and ensure sealing, so that it can be suitable for high-pressure sealing;

[0014] 2. By inputting lubricating oil into the oil chamber from the oil inlet and then discharging it from the oil outlet, the rotation of the worm gear can be lubricated. By continuously inputting and discharging lubricating oil, the heat generated by the rotation of the worm gear can be absorbed, thereby having a heat dissipation effect and reducing the influence of thermal expansion and contraction on the rotation of the worm gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0016] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model.

[0017] Figure 3 It is a schematic diagram of the worm-rod connection structure of the utility model.

[0018] Figure 4 It is a structural schematic diagram of the first shaft seal assembly of the utility model.

[0019] The figures are marked as follows: 1. housing; 2. turbine; 3. end cover; 4. oil inlet; 5. oil outlet; 6. first shaft seal assembly; 601. bearing outer ring; 602. bearing inner ring; 603. connecting plate; 7. sealing gasket; 8. gasket; 9. spring; 10. second shaft seal assembly. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] As attached Figure 1-4 The turbocharger high-pressure sealing structure shown includes a housing 1, a vortex rod 2 is coaxially installed in the housing 1, a first shaft seal assembly 6 is sleeved on the vortex rod 2 inside the housing 1, a sealing gasket 7 is arranged on one side of the first shaft seal assembly 6, a gasket 8 is arranged on one side of the sealing gasket 7, a spring 9 is arranged on one side of the gasket 8, a second shaft seal assembly 10 is arranged on one side of the spring 9, and an end cover 3 connected to the housing 1 is crimped on one side of the second shaft seal assembly 10.

[0022] In specific implementation, a sealing gasket 7 is arranged between the first shaft seal assembly 6 and the second shaft seal assembly 10, and the sealing gasket 7 is squeezed and fixed by the spring 9 on the gasket 8, so that the sealing gasket 7 is deformed to seal the worm 2. When the sealing gasket 7 is pushed by external pressure, the spring 9 can support the thrust so as to ensure that the sealing gasket 7 remains sealed. During the rotation of the worm 2, since the sealing gasket 7 is squeezed between the first shaft seal assembly 6 and the second shaft seal assembly 10, the sealing gasket 7 can rotate synchronously with the worm 2 to avoid friction between the worm 2 and the sealing gasket 7, thereby avoiding wear on the inner ring of the sealing gasket 7. At the same time, during the rotation process, when the sealing gasket 7 becomes thinner, the spring 9 can also push the gasket 8 and squeeze the sealing gasket 7 to avoid gaps and ensure sealing, so that it can be suitable for high-pressure sealing.

[0023] An oil chamber is disposed between the first shaft seal assembly 6 and the second shaft seal assembly 10 , an oil inlet 4 is disposed at the bottom end of the oil chamber, and an oil outlet 5 is disposed at the top end of the oil chamber.

[0024] During specific implementation, lubricating oil is input into the oil chamber from the oil inlet 4 and then discharged from the oil outlet 5, thereby lubricating the rotation of the worm 2. The heat generated by the rotation of the worm 2 can be absorbed by continuously inputting and discharging lubricating oil, thereby having a heat dissipation effect and reducing the influence of thermal expansion and contraction on the rotation of the worm 2.

[0025] The structure of the first shaft seal assembly 6 is the same as that of the second shaft seal assembly 10 . The first shaft seal assembly 6 includes a bearing outer ring 601 , a bearing inner ring 602 and a connecting plate 603 . The bearing outer ring 601 is provided with a bearing inner ring 602 , and the bearing inner ring 602 is connected to the connecting plate 603 .

[0026] During specific implementation, when the inner ring 602 of the synchronous bearing of the worm 2 rotates, the connecting plate 603 can rotate accordingly, so that the sealing gasket 7 supported and fixed by the spring 9 between the connecting plates 603 can rotate together with the worm 2, thereby reducing the friction generated between the worm 2 and the inner ring of the sealing gasket 7 when the worm 2 rotates, thereby reducing the wear on the sealing gasket 7 and increasing the service life of the sealing gasket 7.

[0027] The sealing gasket 7 is a rubber gasket, and the sealing gasket 7 is sleeved on the worm shaft 2 by deformation.

[0028] The gasket 8 is made of metal material and is pressed onto the sealing gasket 7 .

[0029] A rotary joint is provided on one side of the end cover 3 , and a screw groove is provided on the inner wall of one end of the shell 1 , and the rotary joint is screwed to the shell 1 through the screw groove.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A turbocharger high pressure sealing structure, comprising a housing (1), characterized in that: A vortex (2) is coaxially mounted in the housing (1); a first shaft seal assembly (6) is sleeved on the vortex (2) in the housing (1); a sealing gasket (7) is arranged on one side of the first shaft seal assembly (6); a gasket (8) is arranged on one side of the sealing gasket (7); a spring (9) is arranged on one side of the gasket (8); a second shaft seal assembly (10) is arranged on one side of the spring (9); and an end cover (3) connected to the housing (1) is crimped onto one side of the second shaft seal assembly (10).

2. The turbocharger high pressure sealing structure according to claim 1, characterized in that: An oil chamber is provided between the first shaft seal assembly (6) and the second shaft seal assembly (10), an oil inlet (4) is provided at the bottom end of the oil chamber, and an oil outlet (5) is provided at the top end of the oil chamber.

3. The turbocharger high pressure sealing structure according to claim 2, characterized in that: The structure of the first shaft seal assembly (6) is the same as that of the second shaft seal assembly (10), the first shaft seal assembly (6) comprising a bearing outer ring (601), a bearing inner ring (602) and a connecting plate (603), the bearing inner ring (602) being arranged inside the bearing outer ring (601), and the bearing inner ring (602) being connected to the connecting plate (603).

4. The turbocharger high pressure sealing structure according to claim 3, characterized in that: The sealing gasket (7) is a rubber gasket, and the sealing gasket (7) is sleeved on the worm shaft (2) by means of deformation.

5. The turbocharger high pressure sealing structure according to claim 4, characterized in that: The gasket (8) is made of a metal material, and the gasket (8) is pressed onto the sealing gasket (7).

6. The turbocharger high pressure sealing structure according to claim 5, characterized in that: A rotary joint is provided on one side of the end cover (3), a screw groove is provided on the inner wall of one end of the outer shell (1), and the rotary joint is screwed to the outer shell (1) via the screw groove.

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