Passenger car gasoline engine turbocharger bearing

Abstract

The utility model provides a turbocharger bearing of a gasoline engine of a passenger car, belongs to the field of turbocharger bearings, and aims to solve the problem of poor flowability of lubricating oil. A bearing inner ring is sleeved with the bearing outer ring, a gap exists between the bearing outer ring and the bearing inner ring, two sets of bearing balls are rotationally connected into the gap between the bearing outer ring and the bearing inner ring, a middle retainer is arranged between the two sets of bearing balls, and a top sealing plate is slidably connected to the top of the gap between the bearing outer ring and the bearing inner ring. The bottom of the bearing outer ring is fixedly connected with a bottom sealing plate; when the turbocharger bearing of the gasoline engine of the passenger car runs at a high speed, lubricating oil in a gap between the bearing outer ring and the bearing inner ring enters the oil guide ring from the oil inlet hole, and then overflows from the through oil hole and the oil dispersing groove under the influence of inertia, so that the friction force between the middle retainer and the bearing ball is reduced, and the service life of the bearing is prolonged. Oil liquid is stirred through the oil winding plates on the inner side wall and the outer side wall of the middle retainer, so that the flowability of lubricating oil can be kept.

Description

Technical Field

[0001] The utility model relates to the technical field of turbocharged bearings, in particular to a bearing for a passenger car gasoline engine turbocharger. Background Technique

[0002] A turbocharger is actually an air compressor, mainly composed of a pump impeller and a turbine. The pump impeller and the turbine are connected by a shaft, that is, a rotor. The exhaust gas discharged from the engine drives the pump impeller, and the pump impeller drives the turbine to rotate. After the turbine rotates, it supercharges the intake system. When the turbocharger works, the bearing rotates at a high speed between the rotor shaft and the bearing housing. The key to achieving high speed and long life lies in the performance of the bearing body. For the lubricating oil between the inner and outer rings, the cage and the balls of the existing turbocharger bearing, due to long-term use and the lack of a structure for agitating the oil, the lubricating oil becomes viscous and its flow becomes poor, resulting in increased bearing wear and affecting the flexibility of the bearing. Content of the Utility Model

[0003] The purpose of the utility model is to provide a bearing for a passenger car gasoline engine turbocharger to solve the problem that the existing turbocharger bearing has viscous lubricating oil and poor flow due to long-term use and the lack of a structure for agitating the oil, resulting in increased bearing wear and affecting the flexibility of the bearing as mentioned in the above background technique.

[0004] The purpose and effect of the bearing for a passenger car gasoline engine turbocharger of the utility model are achieved by the following specific technical means:

[0005] A bearing for a passenger car gasoline engine turbocharger, wherein the bearing for a passenger car gasoline engine turbocharger includes an outer bearing ring; an inner bearing ring is sleeved inside the outer bearing ring, there is a gap between the outer bearing ring and the inner bearing ring, two groups of bearing balls are rotatably connected in the gap between the outer bearing ring and the inner bearing ring, a central cage is arranged between the two groups of bearing balls, a top sealing plate is slidably connected to the top of the gap between the outer bearing ring and the inner bearing ring, and a bottom sealing plate is fixedly connected to the bottom of the outer bearing ring.

[0006] Furthermore, outer ring limiting convex rings are arranged at both the upper and lower ends of the inner side wall of the outer bearing ring. Equally spaced outer ring anti-friction ball holes are opened in the inner side wall of the outer ring limiting convex ring at the top of the outer bearing ring, and anti-friction balls are rotatably connected in the outer ring anti-friction ball holes. The bottom of the outer ring limiting convex ring at the bottom of the outer bearing ring is connected to the bottom sealing plate by fixing bolts, and the limiting convex platform protruding from the top of the bottom sealing plate is stuck in the gap between the outer bearing ring and the inner bearing ring.

[0007] Further, a limit convex ring is provided at the top of the outer side wall of the inner ring of the bearing. Equally spaced inner ring anti-friction ball holes are provided in the outer side wall of the limit convex ring of the inner ring. Anti-friction balls are rotatably connected in the inner ring anti-friction ball holes. The bottom outer side wall of the inner ring of the bearing is slidably connected in the bottom sealing plate.

[0008] Further, equally spaced ball grooves are provided in the upper and lower side walls of the middle cage. The bearing balls are rotatably connected in the ball grooves. A through oil hole is provided in the middle of the ball groove. A guide oil ring is connected to the middle of the through oil hole. The guide oil ring is provided in the middle of the inner part of the middle cage. Inclined oil inlet holes are equally spaced in the inner side wall of the middle cage and are connected to the guide oil ring. An "X"-shaped oil dispersing groove is provided in the ball groove and is connected to the through oil hole.

[0009] Further, arc-shaped oil bypass plates are equally spaced and installed on the inner and outer side walls of the middle cage. The bending directions of the oil bypass plates on the inner and outer side walls of the middle cage are opposite.

[0010] Further, the top sealing plate is annular. Anti-leakage convex rings are provided at the bottoms of the inner and outer side walls of the top sealing plate. The anti-leakage convex rings are stuck at the bottoms of the outer ring limit convex ring at the top of the outer ring of the bearing and the inner ring limit convex ring at the top of the inner ring of the bearing. The inner and outer side walls of the top sealing plate are both slidably connected to the anti-friction balls.

[0011] The utility model provides a bearing for a passenger car gasoline engine turbocharger, which has the following beneficial effects:

[0012] 1. By providing ball grooves in the upper and lower side walls of the middle cage to limit the positions of each bearing ball, and by providing a through oil hole communicating with the ball groove, and the through oil hole is connected to the guide oil ring. When the bearing rotates at a high speed, the lubricating oil in the gap between the outer ring and the inner ring of the bearing enters the guide oil ring from the oil inlet hole, and then due to inertia, it will overflow from the through oil hole and the oil dispersing groove, thereby reducing the friction between the middle cage and the bearing balls, so as to increase the bearing speed. And the oil bypass plates on the inner and outer side walls of the middle cage can stir the oil liquid to maintain the fluidity of the lubricating oil.

[0013] 2. By the cooperation of the anti-leakage convex rings on the inner and outer side walls of the top sealing plate with the outer ring limit convex ring and the inner ring limit convex ring, a closed space is formed to prevent the leakage of the lubricating oil liquid. And anti-friction balls are provided between the outer side wall at the top of the top sealing plate and the outer ring limit convex ring, which can reduce the influence of the top sealing plate on the rotation of the outer ring of the bearing. Description of the Drawings

[0014] Figure 1 is a top-down structural schematic diagram of the utility model;

[0015] Figure 2 is a bottom-up structural schematic diagram of the utility model;

[0016] Figure 3 This is a schematic diagram of the overall split structure of the utility model;

[0017] Figure 4 This is a schematic diagram of the cross-section structure of the outer ring and top sealing plate of the bearing of the utility model;

[0018] Figure 5 It is a schematic diagram of the disassembled structure of the bearing outer ring, top sealing plate, middle retainer and bearing inner ring of the utility model.

[0019] Figure 6 This is a schematic diagram of the cutaway structure of the middle of the central retainer of the utility model.

[0020] In the figure, the corresponding relationship between the component names and the figure numbers is as follows:

[0021] 1. Bearing outer ring; 101. Outer ring limiting convex ring; 102. Outer ring friction reducing ball hole; 2. Top sealing plate; 201. Anti-leakage convex ring; 3. Bottom sealing plate; 301. Limiting boss; 4. Fixing bolt; 5. Friction reducing ball; 6. Bearing ball; 7. Center retaining rack; 701. Ball slot hole; 702. Through oil hole; 703. Oil guide ring; 704. Oil inlet hole; 705. Oil dispersion groove; 706. Oil bypass plate; 8. Bearing inner ring; 801. Inner ring limiting convex ring; 802. Inner ring friction reducing ball hole. DETAILED DESCRIPTION

[0022] The implementation of the utility model is further described in detail below in conjunction with the drawings and examples. Embodiment 1:

[0023] As attached Figure 1 To Attachment Figure 6 As shown:

[0024] The utility model provides a bearing for a passenger car gasoline engine turbocharger, comprising: an outer bearing ring 1; an inner bearing ring 8 is sleeved inside the outer bearing ring 1, and there is a gap between the outer bearing ring 1 and the inner bearing ring 8. Two groups of bearing balls 6 are rotatably connected in the gap between the outer bearing ring 1 and the inner bearing ring 8. A central cage 7 is arranged between the two groups of bearing balls 6. A top sealing plate 2 is slidably connected to the top of the gap between the outer bearing ring 1 and the inner bearing ring 8. A bottom sealing plate 3 is fixedly connected to the bottom of the outer bearing ring 1. Outer limiting convex rings 101 are arranged at both upper and lower ends of the inner side wall of the outer bearing ring 1. Outer friction-reducing ball holes 102 are equidistantly arranged in the inner side wall of the outer limiting convex ring 101 at the top of the outer bearing ring 1. Friction-reducing balls 5 are rotatably connected in the outer friction-reducing ball holes 102. The bottom of the outer limiting convex ring 101 at the bottom of the outer bearing ring 1 is connected to the bottom sealing plate 3 through a fixing bolt 4. A limiting boss 301 protruding from the top of the bottom sealing plate 3 is stuck in the gap between the outer bearing ring 1 and the inner bearing ring 8. Specifically, by arranging the top sealing plate 2 and the bottom sealing plate 3 at the top and bottom of the gap between the outer bearing ring 1 and the inner bearing ring 8, a closed space is formed between the outer bearing ring 1 and the inner bearing ring 8, avoiding the leakage or volatilization of lubricating oil and better extending the service life of the bearing. Moreover, friction-reducing balls 5 are arranged between the outer side wall of the top of the top sealing plate 2 and the outer limiting convex ring 101, which can reduce the influence of the top sealing plate 2 on the rotation of the outer bearing ring 1.

[0025] Wherein, an inner limiting convex ring 801 is arranged at the top of the outer side wall of the inner bearing ring 8. Inner friction-reducing ball holes 802 are equidistantly arranged in the outer side wall of the inner limiting convex ring 801. Friction-reducing balls 5 are rotatably connected in the inner friction-reducing ball holes 802. The bottom outer side wall of the inner bearing ring 8 is slidably connected in the bottom sealing plate 3. Specifically, the friction-reducing balls 5 rotatably connected in the inner friction-reducing ball holes 802 are in contact with the inner side wall of the top sealing plate 2, so as to reduce the hindrance to the flexibility of the bearing when closing the gap between the outer bearing ring 1 and the inner bearing ring 8.

[0026] Among them, bearing balls 6 are arranged between the upper and lower sides of the middle cage 7, the top sealing plate 2 and the bottom sealing plate 3. Ball grooves 701 are equidistantly arranged in the upper and lower side walls of the middle cage 7. The bearing balls 6 are rotatably connected in the ball grooves 701. A through oil hole 702 is arranged in the middle of the ball groove 701. A oil guiding ring 703 is connected to the middle of the through oil hole 702. The oil guiding ring 703 is arranged in the middle of the inside of the middle cage 7. Inclined oil inlet holes 704 are equidistantly arranged in the inner side wall of the middle cage 7 and are communicated with the oil guiding ring 703. An "X"-shaped oil dispersing groove 705 is arranged in the ball groove 701 and is communicated with the through oil hole 702. Arc-shaped oil bypass plates 706 are equidistantly installed on the inner and outer side walls of the middle cage 7. The bending directions of the oil bypass plates 706 on the inner and outer side walls of the middle cage 7 are opposite. Specifically, by arranging the ball grooves 701 in the upper and lower side walls of the middle cage 7, the positions of each bearing ball 6 can be restricted. However, the through oil hole 702 communicated with each other is arranged in the ball groove 701, and the through oil hole 702 is also communicated with the oil guiding ring 703. When the bearing rotates at a high speed, the lubricating oil in the gap between the outer ring 1 and the inner ring 8 of the bearing enters the oil guiding ring 703 from the oil inlet hole 704, and then overflows from the through oil hole 702 and the oil dispersing groove 705 under the influence of inertia, thereby reducing the friction between the middle cage 7 and the bearing balls 6, improving the bearing rotation speed, and the oil bypass plates 706 on the inner and outer side walls of the middle cage 7 can stir the oil fluid to maintain the fluidity of the lubricating oil.

[0027] Among them, the top sealing plate 2 is annular. Leakage prevention convex rings 201 are arranged at the bottoms of the inner and outer side walls of the top sealing plate 2. The leakage prevention convex rings 201 are stuck at the bottoms of the outer ring limit convex ring 101 at the top of the outer ring 1 of the bearing and the inner ring limit convex ring 801 at the top of the inner ring 8 of the bearing. The inner and outer side walls of the top sealing plate 2 are both slidably connected with the friction reducing balls 5. Specifically, through the cooperation of the leakage prevention convex rings 201 on the inner and outer side walls of the top sealing plate 2, the outer ring limit convex ring 101 and the inner ring limit convex ring 801, a closed space is formed to prevent the leakage of the lubricating oil fluid.

[0028] The specific usage mode and function of this embodiment:

[0029] When using the bearing of the turbocharger for a passenger car gasoline engine, by arranging a top sealing plate 2 and a bottom sealing plate 3 at the top and bottom of the gap between the bearing outer ring 1 and the bearing inner ring 8, a closed space is formed between the bearing outer ring 1 and the bearing inner ring 8, avoiding the leakage or volatilization of lubricating oil. Moreover, there are anti-friction balls 5 between the outer side wall of the top of the top sealing plate 2 and the outer ring limiting convex ring 101. The anti-friction balls 5 rotatably connected in the inner ring anti-friction ball holes 802 are in contact with the inner side wall of the top sealing plate 2, so as to reduce the hindrance to the flexibility of the bearing when closing the gap between the bearing outer ring 1 and the bearing inner ring 8. By arranging ball groove holes 701 in the upper and lower side walls of the middle cage 7, the positions of each bearing ball 6 can be restricted. However, through holes 702 communicating with each other are arranged in the ball groove holes 701, and the through holes 702 are also communicated with an oil guiding ring 703. When the bearing runs at a high speed, the lubricating oil in the gap between the bearing outer ring 1 and the bearing inner ring 8 enters the oil guiding ring 703 from the oil inlet hole 704, and then, affected by inertia, it will overflow from the through holes 702 and the oil dispersing grooves 705, thereby reducing the friction between the middle cage 7 and the bearing balls 6. The oil winding plates 706 on the inner and outer side walls of the middle cage 7 can keep the fluidity of the lubricating oil by agitating the oil fluid. Embodiment 2:

[0030] By replacing the bottom sealing plate 3 with the same structure as the top sealing plate 2, the sealing effect can be improved according to the oil pressure between the bearing outer ring 1 and the bearing inner ring 8. The higher the oil pressure, the tighter the top sealing plate 2 is pushed outwards.

Claims

1. The bearing of a passenger car gasoline engine turbocharger, characterized in that: It includes an outer bearing ring; an inner bearing ring is sleeved inside the outer bearing ring, and there is a gap between the outer bearing ring and the inner bearing ring. Two groups of bearing balls are rotatably connected in the gap between the outer bearing ring and the inner bearing ring. A central cage is provided between the two groups of bearing balls. A top sealing plate is slidably connected to the top of the gap between the outer bearing ring and the inner bearing ring, and a bottom sealing plate is fixedly connected to the bottom of the outer bearing ring.

2. The passenger car gasoline engine turbocharger bearing according to claim 1, wherein: Outer ring limiting convex rings are provided at both the upper and lower ends of the inner side wall of the outer bearing ring. Outer ring anti-friction ball holes are equidistantly formed in the inner side wall of the outer ring limiting convex ring at the top of the outer bearing ring. Anti-friction balls are rotatably connected in the outer ring anti-friction ball holes. The bottom of the outer ring limiting convex ring at the bottom of the outer bearing ring is connected to the bottom sealing plate by fixing bolts, and the limiting convex platform protruding from the top of the bottom sealing plate is stuck in the gap between the outer bearing ring and the inner bearing ring.

3. The passenger car gasoline engine turbocharger bearing according to claim 1, characterized in that: An inner ring limiting convex ring is provided at the top of the outer side wall of the inner bearing ring. Inner ring anti-friction ball holes are equidistantly formed in the outer side wall of the inner ring limiting convex ring. Anti-friction balls are rotatably connected in the inner ring anti-friction ball holes. The bottom outer side wall of the inner bearing ring is slidably connected in the bottom sealing plate.

4. The passenger car gasoline engine turbocharger bearing according to claim 1, wherein: Through oil holes are equidistantly formed in the upper and lower side walls of the central cage. The bearing balls are rotatably connected in the through oil holes. A through hole is formed in the middle of the through oil holes, and an oil guiding ring is connected to the middle of the through hole. The oil guiding ring is arranged in the middle of the interior of the central cage. Inclined oil inlet holes are equidistantly formed in the inner side wall of the central cage and are communicated with the oil guiding ring. An "X"-shaped oil dispersing groove is formed in the through oil holes, and the oil dispersing groove is communicated with the through oil holes.

5. The passenger car gasoline engine turbocharger bearing according to claim 1, characterized in that: Arc-shaped oil bypass plates are equidistantly installed on the inner and outer side walls of the central cage, and the bending directions of the oil bypass plates on the inner and outer side walls of the central cage are opposite.

6. The passenger car gasoline engine turbocharger bearing according to claim 1, wherein: The top sealing plate is annular. Anti-leakage convex rings are provided at the bottoms of the inner and outer side walls of the top sealing plate. The anti-leakage convex rings are stuck to the bottoms of the outer ring limiting convex ring at the top of the outer bearing ring and the inner ring limiting convex ring at the top of the inner bearing ring. The inner and outer side walls of the top sealing plate are both slidably connected to the anti-friction balls.

Images