Precise floating bearing of turbocharger

Abstract

The precise floating bearing comprises a bearing outer ring, balls, a bearing inner ring, oil inlet holes, arc-shaped flow guide grooves, V-shaped grooves, a filter screen, an oil conveying channel and a supporting ring, the oil inlet holes which are annularly arranged are formed in the outer surface of the bearing outer ring, the arc-shaped flow guide grooves are formed in the ends, away from the bearing inner ring, of the oil inlet holes, and the V-shaped grooves are formed in the ends, away from the bearing inner ring, of the oil inlet holes. And a filter screen is arranged in each oil inlet hole. By means of the V-shaped groove, a certain amount of lubricating oil can be left, the lubricating oil left in the V-shaped groove can continuously supplement an oil film during high-speed rotation, continuity and stability of the oil film under the high-rotating-speed working condition are guaranteed, and the dry friction phenomenon caused by oil film breakage is avoided; through cooperation of the arc-shaped flow guide groove, the oil inlet hole and the oil conveying channel, lubricating oil can flow into the oil inlet hole in an accelerated mode, the turbulent flow phenomenon of oil flow is reduced, meanwhile, the oil conveying channel can store the lubricating oil, and oil can be continuously conveyed into the oil inlet hole.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of bearings, in particular to a precision floating bearing of a turbocharger. BACKGROUND

[0002] The turbocharger is a device for driving a turbine to rotate by using the exhaust gas of an engine, and then compressing intake air to improve the intake density of the engine. The floating bearing plays a crucial role in the turbocharger and is mainly used to support the turbine shaft. The working principle of the floating bearing is to form an oil film between the bearing and the shaft neck by using lubricating oil, so that the bearing is in a "floating" state during high-speed rotation, thereby reducing friction and wear.

[0003] The application number 202123318294.4 discloses a precision floating bearing of a turbocharger, and relates to the field of automobile accessories. The precision floating bearing of the turbocharger comprises a floating bearing body, a bearing outer support surface arranged on the floating bearing body, a bearing inner support surface arranged on the inner ring of the floating bearing body, a placing groove arranged on the outer surface of the floating bearing body, a turbine main shaft arranged in the placing groove, an oil hole arranged in the floating bearing body, a filtering assembly arranged on the top of the floating bearing body, and a lubricating assembly arranged on one side of the inner part of the floating bearing body. The filtering screen is inserted into the gap between the floating bearing body and the fixed plate during the assembly of the floating bearing. Then, the two ends of the filtering screen are welded to form welding points. Since the two ends of the fixed plate are in a slope shape, the opening is relatively large, so that the filtering screen can be welded by the staff. The operation is simple and convenient, the processing technology requirement is low, and the impurities entering the floating bearing are effectively reduced.

[0004] The above-mentioned scheme has the following disadvantages during use. The filtering screen arranged outside the floating bearing body can affect the flow of the lubricating oil, thereby affecting the formation and stability of the oil film and increasing the risk of friction and wear. Therefore, the precision floating bearing of the turbocharger is proposed to solve the above-mentioned problems. Inventive content

[0005] The application aims to provide a precision floating bearing of a turbocharger to solve the problems in the background art.

[0006] To achieve the above-mentioned purpose, the application provides the following technical scheme.

[0007] The precision floating bearing of the turbocharger comprises a bearing outer ring, a ball, a bearing inner ring, an oil inlet hole, an arc-shaped flow guide groove, a V-shaped groove, a filtering screen, an oil conveying channel and a supporting ring. An annular oil inlet hole is arranged on the outer surface of the bearing outer ring. An arc-shaped flow guide groove is arranged at the end of each oil inlet hole away from the bearing inner ring. A filtering screen is arranged in each oil inlet hole. A group of V-shaped grooves are arranged on the outer surface of the bearing outer ring. An oil conveying channel is arranged in the inner part of the bearing outer ring.

[0008] In further embodiments, a set of the balls is located between the outer ring and the inner ring, and the balls are arranged in a ring shape.

[0009] In further embodiments, the two V-shaped grooves are symmetrically arranged, and the edges of each V-shaped groove are arc-shaped.

[0010] In further embodiments, each of the oil inlet holes is internally provided with a support ring, and each of the support rings is located on the side of the filter screen close to the inner ring.

[0011] In further embodiments, the oil inlet hole is in communication with the oil delivery channel.

[0012] In further embodiments, the filter screen has a pore size of 0.1-0.2 mm, and the gap between the support ring and the filter screen is 0.1 mm.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] The V-shaped groove can retain a certain amount of lubricating oil, and the retained lubricating oil in the V-shaped groove can continuously supplement the oil film when the bearing rotates at high speed, thereby ensuring the continuity and stability of the oil film under high-speed working conditions and avoiding dry friction caused by the rupture of the oil film. The arc-shaped flow guide groove, the oil inlet hole and the oil delivery channel cooperate to accelerate the flow of the lubricating oil to the oil inlet hole, reduce the turbulent flow of the oil, store the lubricating oil in the oil delivery channel, and continuously deliver the lubricating oil to the oil inlet hole. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is a schematic diagram of the overall three-dimensional structure of the precision floating bearing of the turbocharger.

[0016] Fig. 2 It is a schematic diagram of the overall three-dimensional structure of the bearing outer ring of the precision floating bearing of the turbocharger.

[0017] Fig. 3 It is a schematic diagram of the overall three-dimensional structure of the oil delivery channel of the precision floating bearing of the turbocharger.

[0018] In the figure: 1, bearing outer ring; 2, ball; 3, bearing inner ring; 4, oil inlet hole; 5, arc-shaped flow guide groove; 6, V-shaped groove; 7, filter screen; 8, oil delivery channel; 9, support ring. DETAILED DESCRIPTION

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figs. 1-3 In this utility model, a precision floating bearing for a turbocharger includes an outer ring 1, balls 2, an inner ring 3, an oil inlet 4, an arc-shaped guide groove 5, a V-shaped groove 6, a filter screen 7, an oil channel 8, and a support ring 9. A set of balls 2 is located between the outer ring 1 and the inner ring 3, and the set of balls 2 is arranged in a ring. The balls 2 can support the inner ring 3 and support it to rotate at high speed.

[0022] The outer surface of the bearing outer ring 1 is provided with annularly arranged oil inlet holes 4. Each oil inlet hole 4 has an arc-shaped guide groove 5 at the end away from the bearing inner ring 3. The arc-shaped guide groove 5 can accelerate the flow of lubricating oil and reduce the turbulence of the oil flow. Each oil inlet hole 4 is provided with a filter screen 7. The filter screen 7 can filter the lubricating oil and block impurities in the lubricating oil to prevent impurities from entering between the bearing outer ring 1 and the bearing inner ring 3. Each oil inlet hole 4 is provided with a support ring 9. Each support ring 9 is located on the side of the filter screen 7 closer to the bearing inner ring 3. The support ring 9 can support the filter screen 7 and prevent the filter screen 7 from concave inward and blocking the oil passage 8. The filter screen 7 has a pore diameter of 0.1 to 0.2 mm and the gap between the support ring 9 and the filter screen 7 is 0.1 mm, which can effectively filter out small impurities and particles in the lubricating oil and prevent these contaminants from entering the bearing and causing wear or blockage.

[0023] A set of V-grooves 6 are provided on the outer surface of the outer ring 1 of the bearing. The two V-grooves 6 are symmetrically arranged, and the edge of each V-groove 6 is arc-shaped. The V-grooves 6 can store a certain amount of lubricating oil, and the lubricating oil remaining in the V-grooves 6 will continuously replenish the oil film, ensuring the continuity and stability of the oil film under high speed conditions and avoiding dry friction caused by oil film rupture. The outer ring 1 of the bearing is provided with an oil channel 8, which is connected to the oil inlet 4. The oil channel 8 can store the lubricating oil that continuously enters the oil inlet 4, and the lubricating oil entering the oil channel 8 can be discharged into the oil inlet 4 to continuously supply oil to the inner ring 3 of the bearing.

[0024] The working principle of this application is as follows: When lubricating oil is added to the outer ring 1 of the bearing, the lubricating oil quickly coats the outside of the outer ring 1 and forms a certain residue inside the V-groove 6. As the bearing rotates at high speed, the lubricating oil gradually forms a uniform oil film between the outer ring 1 and the inner ring 3 under the action of centrifugal force, effectively reducing friction and wear. At the same time, the lubricating oil remaining in the V-groove 6 continuously replenishes the oil film, ensuring the continuity and stability of the oil film under high-speed conditions and avoiding dry friction caused by oil film rupture. In addition, the lubricating oil flows along the arc-shaped guide. The lubricating oil flows evenly into the oil inlet hole 4 through the groove 5. The arc-shaped guide groove 5 can accelerate the flow of lubricating oil and reduce the turbulence of the oil flow, ensuring that the lubricating oil enters the oil inlet hole 4 efficiently and flows to the inner ring 3 of the bearing. The lubricating oil entering the oil inlet hole 4 will be further filtered through the filter screen 7 to remove impurities and particles, ensuring the cleanliness of the lubricating oil. Excess lubricating oil in the oil inlet hole 4 will enter the oil delivery channel 8 from the oil inlet hole 4 and be continuously delivered to the other end of the oil inlet hole 4 through the oil delivery channel 8, forming a circulating lubrication, which ensures the lubrication effect and reliability of the bearing under high speed and high temperature conditions.

[0025] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A precision floating bearing for a turbocharger, characterized by: The utility model relates to a bearing, including bearing outer ring (1), ball (2), bearing inner ring (3), oil inlet hole (4), arc flow guide groove (5), V-shaped groove (6), filter screen (7), oil delivery channel (8) and support ring (9), the outer surface of bearing outer ring (1) is set up with annular arrangement oil inlet hole (4), every oil inlet hole (4) is away from the one end of bearing inner ring (3) and is provided with arc flow guide groove (5), every oil inlet hole (4) is provided with filter screen (7) inside, the outer surface of bearing outer ring (1) is set up with a group of V-shaped groove (6), the inside of bearing outer ring (1) is provided with oil delivery channel (8).

2. A precision floating bearing for a turbocharger as defined in claim 1, characterized in that: A group of the ball (2) is located between the bearing outer ring (1) and the bearing inner ring (3), and a group of the ball (2) is annularly arranged.

3. A precision floating bearing for a turbocharger as defined in claim 1, wherein: Two V-shaped grooves (6) are symmetrically arranged, and the edges of each V-shaped groove (6) are arc-shaped.

4. A precision floating bearing for a turbocharger as defined in claim 1, wherein: The inside of each oil inlet hole (4) is provided with a support ring (9), and each support ring (9) is located on the side of the filter screen (7) close to the bearing inner ring (3).

5. A precision floating bearing for a turbocharger as defined in claim 1, wherein: The oil delivery channel (8) is connected with the oil inlet hole (4).

6. A precision floating bearing for a turbocharger as defined in claim 1, wherein: The aperture of the filter screen (7) is 0.1-0.2 mm, and the gap between the support ring (9) and the filter screen (7) is 0.1 mm.

Images