Turbocharger bearing rotor sealing structure

Abstract

The utility model relates to the technical field of bearing rotor sealing structures, and discloses a turbocharger bearing rotor sealing structure which comprises a bearing shell, a rotor and a bearing bush, the bearing bush is arranged between a middle rod body of the rotor and an inner shell cavity of the bearing shell in a sleeved mode, an isolation groove, a buffer groove, an oil groove and a first sealing groove are formed in the bearing shell, and a second sealing groove is formed in the bearing shell. A wear-resistant ceramic sleeve is rotationally arranged in the isolation groove and sleeves the rotor, a first supporting body and a second supporting body are rotationally arranged in the buffer groove, sealing rings are arranged in the first sealing groove communicating with the oil groove for sealing, the two sealing rings are arranged to improve the sealing effect, and due to the fact that the first sealing groove communicates with the oil groove, the sealing effect is improved. And the elastic spacer bush is arranged for separating the two sealing rings, when one sealing ring deviates in the first sealing groove, the elastic spacer bush is properly extruded, so that the other sealing ring is extruded to the rotor, and the sealing effect is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing rotor sealing structures, in particular to a turbocharger bearing rotor sealing structure. Background Art

[0002] A turbocharger is actually an air compressor that increases the intake volume by compressing air. It uses the inertial impact of the exhaust gas discharged by the engine to drive the turbine in the turbine chamber. The turbine drives the coaxial impeller, which presses the air sent from the air filter pipe to enter the cylinder with pressure. When sealing the bearing rotor of the turbocharger, traditional sealing methods are used: labyrinth seal and piston ring seal. The above two sealing methods are too simple for the sealing between the bearing housing and the rotor. During the long-term operation of the sealing rubber ring, intermittent sealing failures are prone to occur between the bearing rotor and the bearing housing. The slight changes caused by such sealing failures will subtly affect the installation sealing between the bearing rotor and the bearing housing. Utility Model Content

[0003] The utility model aims to provide a turbocharger bearing rotor sealing structure to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a turbocharger bearing rotor sealing structure, comprising a bearing housing, a rotor, and a bearing sleeve, wherein the bearing sleeve is sleeved between the center rod body of the rotor and the inner shell cavity of the bearing housing, and an isolation groove, a buffer groove, an oil groove, and a sealing groove 1 are provided in the bearing housing, a wear-resistant ceramic sleeve is rotatably arranged in the isolation groove, and the wear-resistant ceramic sleeve is sleeved on the rotor, a support body 1 and a support body 2 are rotatably arranged in the buffer groove, the support body 1 and the support body 2 are symmetrically arranged, and the support body 1 and the support body 2 are rotatably sleeved on the rotor, a sealing ring 1 is rotatably arranged in the oil groove, a sealing ring is rotatably arranged in the sealing groove 1, and there are two sealing rings in one sealing groove 1, and an elastic spacer is arranged between the two sealing rings.

[0005] Furthermore, the cross-section of the support body 1 and the support body 2 is L-shaped, the outer walls of the support body 1 and the support body 2 are provided with ventilation holes, the inner walls on both sides of the buffer groove are provided with through holes, and the through holes are connected to the interior of the isolation groove and the oil groove.

[0006] Furthermore, an inner cavity is provided on the inner side of the wear-resistant ceramic sleeve, a support ring is fixedly provided on the inner wall of the inner cavity, and the support ring is rotatably sleeved on the rotor.

[0007] Furthermore, a liquid storage groove is provided on the inner wall of the oil groove, and the liquid storage groove is communicated with the groove on the sealing ring.

[0008] Furthermore, the sealing ring includes an elastic sheet and a ball. A plurality of the balls are provided and sandwiched between two elastic sheets. Circular tracks are provided on the left and right outer walls of the elastic spacer, and the sealing ring is slidably arranged in the circular track.

[0009] Furthermore, a sealing groove 2 is opened inside the bearing housing, a sealing ring 2 is arranged on the inner wall of the sealing groove 2, the sealing ring 2 is sleeved on the bearing housing, a positioning pressure ring is rotatably sleeved on the outer wall of the rotor, and the positioning pressure ring is fixedly connected to the side of the bearing housing by screws.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] 1. Sealing is performed by arranging a sealing ring in the sealing groove 1 connected to the oil groove. Two sealing rings are arranged to improve the sealing effect. Since the sealing groove 1 is connected to the oil groove, the lubricating oil can flow quickly to the sealing ring. An elastic spacer is arranged to separate the two sealing rings. When one sealing ring deviates in the sealing groove 1, the elastic spacer will be appropriately squeezed, so that the other sealing ring is squeezed onto the rotor, thereby ensuring the sealing effect.

[0012] 2. By pressing the wear-resistant ceramic sleeve onto the left and right ends of the bearing sleeve, the bearing sleeve is limited and the friction between the end of the bearing sleeve and the inner wall of the bearing housing is reduced. A buffer groove is provided to separate the isolation groove and the oil groove for buffering. When the bearing housing rotates rapidly, the lubricating oil can be thrown into the buffer groove. When the bearing housing rotates at a low speed, the lubricating oil in the buffer groove can also flow into the isolation groove under the action of the pressure difference. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 For this utility model Figure 1 A schematic diagram of the structure in a front cross-sectional view;

[0015] Figure 3 It is a structural schematic diagram of a front cross-sectional view of a bearing housing of the utility model;

[0016] Figure 4 It is a schematic diagram of the structure of the rotor and the bearing bushing of the utility model;

[0017] Figure 5 It is a structural schematic diagram of an exploded view of the internal structure of the bearing housing of the utility model.

[0018] In the figure: 1. bearing housing; 2. rotor; 3. bearing bushing; 4. positioning pressure ring; 5. isolation groove; 6. buffer groove; 7. oil groove; 8. sealing groove one; 9. wear-resistant ceramic sleeve; 10. support body one; 11. support body two; 12. ventilation hole; 13. sealing ring one; 14. sealing ring; 15. elastic spacer; 16. sealing groove two; 17. sealing ring two; 901. inner cavity; 902. support ring; 1301. liquid storage groove; 1401. elastic sheet; 1402. ball; 1501. circular track. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] See also Figure 1-Figure 5The utility model provides a technical solution: a turbocharger bearing rotor sealing structure, including a bearing housing 1, a rotor 2, and a bearing bushing 3. The bearing bushing 3 is sleeved between the center rod of the rotor 2 and the inner shell cavity of the bearing housing 1. The bearing housing 1 is provided with an isolation groove 5, a buffer groove 6, an oil groove 7, and a sealing groove 8. A wear-resistant ceramic sleeve 9 is rotatably arranged in the isolation groove 5. The wear-resistant ceramic sleeve 9 is sleeved on the rotor 2. A support body 10 and a support body 2 11 are rotatably arranged in the buffer groove 6. The support body 10 and the support body 2 11 are symmetrical. The support body 10 and the support body 2 rotatably sleeved on the rotor 2, a sealing ring 13 is rotatably arranged in the oil groove 7, a sealing ring 14 is rotatably arranged in the sealing groove 8, and there are two sealing rings 14 in one sealing groove 8, and an elastic spacer 15 is arranged between the two sealing rings 14, and an isolation groove 5 is arranged in the bearing housing 1 for installing the wear-resistant ceramic sleeve 9, and the wear-resistant ceramic sleeve 9 is pressed on the left and right ends of the bearing sleeve 3 to limit the bearing sleeve 3, and reduce the end of the bearing sleeve 3 and the inner wall of the bearing housing 1. Friction, a buffer groove 6 is provided to separate the isolation groove 5 and the oil groove 7 for buffering. When the bearing housing 1 rotates rapidly, the lubricating oil can be thrown into the buffer groove 6. When the bearing housing 1 rotates at a low speed, the lubricating oil in the buffer groove 6 can also flow into the isolation groove 5 under the action of the pressure difference, and then flow to the wear-resistant ceramic sleeve 9. A support body 10 and a support body 2 11 are provided to support the inside of the buffer groove 6 and slow down the flow rate of the lubricating oil flowing from the oil groove 7 into the isolation groove 5, so as to avoid a large amount of lubricating oil when the bearing housing 1 rotates at a low speed. The oil flows from the oil groove 7 to the isolation groove 5, and is sealed by setting a sealing ring 14 in the sealing groove 8 connected to the oil groove 7. The two sealing rings 14 are set to improve the sealing effect. Because the sealing groove 8 is connected to the oil groove 7, the lubricating oil can quickly flow to the sealing ring 14. An elastic spacer 15 is set to separate the two sealing rings 14. When one sealing ring 14 deviates in the sealing groove 8, the elastic spacer 15 will be appropriately squeezed, so that the other sealing ring 14 is squeezed onto the rotor 2, ensuring the sealing effect.

[0021] The cross-section of the support body 10 and the support body 2 11 is L-shaped. On the premise of supporting the inside of the buffer tank 6, the occupation of the internal space of the buffer tank 6 is reduced. The outer walls of the support body 10 and the support body 2 11 are provided with ventilation holes 12 for the internal gas circulation of the buffer tank 6, thereby preventing the lubricating oil in the isolation tank 5 from being thrown into the buffer tank 6 due to the high air pressure in the buffer tank 6. Through holes are provided on the inner walls on both sides of the buffer tank 6, and the through holes are connected with the isolation tank 5 and the interior of the oil tank 7, ensuring that the lubricating oil in the oil tank 7 can flow into the buffer tank 6 and the lubricating oil in the buffer tank 6 can flow into the isolation tank 5;

[0022] An inner cavity 901 is provided inside the wear-resistant ceramic sleeve 9 for storing lubricating oil. A support ring 902 is fixedly provided on the inner wall of the inner cavity 901. The support ring 902 is rotatably sleeved on the rotor 2 to support the wear-resistant ceramic sleeve 9.

[0023] The inner wall of the oil tank 7 is provided with a liquid storage groove 1301, which is connected with the groove on the sealing ring 13 and is used for storing lubricating oil;

[0024] The sealing ring 14 includes an elastic sheet 1401 and a ball 1402. A plurality of balls 1402 are provided and sandwiched between two elastic sheets 1401. Circular tracks 1501 are provided on the left and right outer walls of the elastic spacer 15. The sealing ring 14 is slidably arranged in the circular tracks 1501 to limit the sealing ring 14 and prevent the sealing ring 14 from being separated from the elastic spacer 15.

[0025] A sealing groove 16 is provided inside the bearing housing 1, and a sealing ring 17 is provided on the inner wall of the sealing groove 16. The sealing ring 17 is sleeved on the bearing housing 1 to perform the first sealing. A positioning pressure ring 4 is rotatably sleeved on the outer wall of the rotor 2. The positioning pressure ring 4 is fixedly connected to the side of the bearing housing 1 by screws to cover the joints at the ends of the bearing housing 1 and the rotor 2.

[0026] Working principle: When in use, sealing is performed through the sealing ring 14. When gas and oil enter the sealing groove 8, they will be blocked by the first sealing ring 14. When the rotor 2 rotates to make the sealing ring 14 rotate, the lubricating oil in the oil groove 7 will enter the sealing ring 14 and the sealing groove 8 to form a seal to prevent gas and oil from entering. When the bearing housing 1 rotates rapidly, the lubricating oil can be thrown into the buffer groove 6. When the bearing housing 1 rotates at a low speed, the lubricating oil in the buffer groove 6 can also flow into the isolation groove 5 under the action of the pressure difference, and then flow to the wear-resistant ceramic sleeve 9.

[0027] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

Claims

1. A turbocharger bearing rotor sealing structure, comprising a bearing housing (1), a rotor (2), and a bearing bushing (3), characterized in that: The bearing bushing (3) is sleeved between the central rod body of the rotor (2) and the inner shell cavity of the bearing housing (1); the bearing housing (1) is provided with an isolation groove (5), a buffer groove (6), an oil groove (7), and a sealing groove (8); a wear-resistant ceramic sleeve (9) is rotatably arranged in the isolation groove (5); the wear-resistant ceramic sleeve (9) is sleeved on the rotor (2); a support body (10) and a support body (11) are rotatably arranged in the buffer groove (6); the support body (10) and the support body (11) are symmetrically arranged, and the support body (10) and the support body (11) are rotatably sleeved on the rotor (2); a sealing ring (13) is rotatably arranged in the oil groove (7); a sealing ring (14) is rotatably arranged in the sealing groove (8); two sealing rings (14) are arranged in one sealing groove (8), and an elastic spacer (15) is arranged between the two sealing rings (14).

2. A turbocharger bearing rotor sealing structure according to claim 1, characterized in that: The cross-section of the support body 1 (10) and the support body 2 (11) is L-shaped, and the outer walls of the support body 1 (10) and the support body 2 (11) are provided with ventilation holes (12), and the inner walls on both sides of the buffer groove (6) are provided with through holes, and the through holes are connected to the interior of the isolation groove (5) and the oil groove (7).

3. The turbocharger bearing rotor sealing structure according to claim 1, characterized in that: An inner cavity (901) is provided on the inner side of the wear-resistant ceramic sleeve (9), a support ring (902) is fixedly provided on the inner wall of the inner cavity (901), and the support ring (902) is rotatably sleeved on the rotor (2).

4. A turbocharger bearing rotor sealing structure according to claim 1, characterized in that: The inner wall of the oil tank (7) is provided with a liquid storage groove (1301), and the liquid storage groove (1301) is communicated with the groove on the sealing ring (13).

5. The turbocharger bearing rotor sealing structure according to claim 1, characterized in that: The sealing ring (14) comprises an elastic sheet (1401) and a ball (1402), wherein a plurality of the ball (1402) are provided and sandwiched between two elastic sheets (1401), and circular tracks (1501) are provided on the left and right outer walls of the elastic spacer (15), and the sealing ring (14) is slidably arranged in the circular track (1501).

6. The turbocharger bearing rotor sealing structure according to claim 1, characterized in that: The bearing housing (1) is provided with a second sealing groove (16) inside, and a second sealing ring (17) is provided on the inner wall of the second sealing groove (16). The second sealing ring (17) is sleeved on the bearing housing (1). The outer wall of the rotor (2) is rotatably sleeved with a positioning pressure ring (4), and the positioning pressure ring (4) is fixedly connected to the side of the bearing housing (1) by screws.

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