CN201180738Y

CN201180738Y - Thrust bearing of turbosupercharger

Info

Publication number: CN201180738Y
Application number: CNU2008200527147U
Authority: CN
Inventors: 廖云; 曾国卫; 胡辽平
Original assignee: Hunan Tianyan Machinery Co Ltd
Current assignee: Hunan Tianyan Machinery Co Ltd
Priority date: 2008-03-28
Filing date: 2008-03-28
Publication date: 2009-01-14
Anticipated expiration: 2018-03-28

Abstract

The utility model provides a thrust bearing of a turbocharger. A plurality of bearing bushes are uniformly distributed along the circumferences of the front and the back surfaces of the thrust bearing; each bearing bush includes an oil wedge surface, an oil baffling step, an oil storing surface and an oil retaining step; the oil wedge surface is arranged between the oil baffling step and the oil storing surface; the oil baffling step is a platform bulging outwards; the oil storing surface is recessed inwards; the oil retaining step is arranged on the outside of the oil wedge surface; one end of the oil retaining step is connected with the oil baffling step, and the other end thereof id connected with the oil baffling step of the adjacent bearing bush; the whole of the oil retaining steps and the oil baffling steps of the bearing bushes forms an annular convex platform higher than the oil storing surface outside the oil storing surface and the oil wedge surface. Therefore, the lubricating oil flowing through the oil wedge surface of one bearing bush of the thrust bearing of the turbocharger can be prevented from flowing into the next bearing bush of the thrust bearing of the turbocharger, the decompression of the lubricating oil outside the bearing bushes of the thrust bearing of the turbocharger can be prevented, and the bearing capacity of the thrust bearing of the turbocharger can be further improved.

Description

Thrust bearing of turbocharger

Technical field

The utility model relates to a kind of parts of engine turbine pressurized machine, particularly a kind of thrust bearing of turbocharger.

Background technique

Along with the more and more stricter propelling of vehicular discharge rules, make the supercharging technology widespread usage on vehicle.Turbosupercharger is that the turbine that the high-temp waste gas that utilizes motor to discharge blows pressurized machine runs up, run up thereby drive with the coaxial compressor impeller of turbine, the pressurized air that compressor impeller produces offers motor again, makes the air inlet of motor become pressure air by natural aspiration.Because the air quantity that provides increases, the motor more fuel that can burn makes burning also more simultaneously, and the turbosupercharger power of consumption of engine not, so turbosupercharger also is exhaust-gas turbocharger.After motor uses turbosupercharger, can improve the power per liter of motor greatly, reduce fuel consumption rate, improve the discharging of motor, turbosupercharger is the new high-tech product of energy-saving and environmental protection.Thrust bearing of turbocharger is a vitals of turbosupercharger, at present, the vehicle turbocharger thrust bearing adopts accompanying drawing 4 to the structure shown in the accompanying drawing 5 usually, (front is an accompanying drawing 4 on its two sides, front and back, the back is an accompanying drawing 5) be equipped with the polylith bearing liner that is uniformly distributed along the circumference, bearing liner comprises oil film wedge face 1, retaining tank deck rank 2 and store oil face 3; Oil film wedge face 1 is between retaining tank deck rank 2 and store oil face 3, and oil film wedge face 1 is provided with low side 11 and high-end 12, and low side 11 caves inward, and high-end 12 to outer lug, oil film wedge face 1 be from low side 11 to high-end 12 progressively to the inclined-plane of outer lug; Retaining tank deck rank 2 are the platform to outer lug, and it is high-end 12 identical to the height of outer process to the height of outer process and oil film wedge face 1; Store oil face 3 caves inward.The thrust bearing of turbocharger working principle of this structure is: thrust bearing is fixed on the turbo-charger bearing body by other parts of turbosupercharger, rely on self lubricating oil path and engine oil gallery to be connected as a single entity, the lubricant oil that flows into forms the pressure-bearing oil film between thrust bearing oil film wedge face and other core part of pressurized machine, the pressure-bearing oil film mainly bears the summation of turbocharger air compressor end and turbine end axial force, gap between control turbocharger air compressor and turbine wheel and the housing is to guarantee booster performance and reliable operation.Though the lubricated cooling performance of the thrust bearing of turbocharger of this structure is better, but raising along with HP, hp/litre, under the situation of exhaust brake and high supercharging pressure level, the axial force of turbine rotor also increases, require thrust bearing that higher bearing capacity is arranged, and can make the outside Zhou Liudong of lubricant oil between the retaining tank deck rank 2 of this thrust bearing of turbocharger bearing liner (shown in accompanying drawing 4 to 5), can not will lubricate oil catch in oil film wedge face 1 well, because lubricant oil can outwards flow, the pressure of the oil film on the oil film wedge face 1 can reduce like this, the bearing capacity of thrust bearing of turbocharger is descended, influence turbocharger performance and functional reliability.

Chinese patent CN2900796 discloses another thrust bearing of turbocharger, thrust bearing is made up of 8 bearing tiles that are uniformly distributed along the circumference, bearing tile is by the oil film wedge inclined-plane, bearing tile plane and oil groove are formed, though the oil film wedge inclined-plane is in the middle of oil groove and bearing tile plane. this thrust bearing of turbocharger has the bearing capacity of certain bearing, but it is can make the outside Zhou Liudong of lubricant oil on the oil film wedge inclined-plane and the oil groove outside equally, can not will lubricate oil catch in oil film wedge face and oil groove well, because lubricant oil can outwards flow, the pressure of the oil film on oil film wedge face and the oil groove can reduce like this, the bearing capacity of thrust bearing is descended, influence turbocharger performance and functional reliability.

Summary of the invention

The purpose of this utility model is to overcome the above-mentioned deficiency of prior art and a kind of thrust bearing of turbocharger is provided, it can prevent to flow into through the lubricant oil of the oil film wedge face of thrust bearing of turbocharger bearing liner the next bearing liner of thrust bearing of turbocharger, it can also prevent the pressure release of lubricant oil in the bearing liner outside of thrust bearing of turbocharger, further improves the bearing capacity of thrust bearing of turbocharger.

The technical solution of the utility model is: a kind of thrust bearing of turbocharger, and two sides is equipped with the polylith bearing liner that is uniformly distributed along the circumference before and after it, and bearing liner comprises oil film wedge face, retaining tank deck rank, store oil face and protects the tank deck rank; The oil film wedge face is between retaining tank deck rank and store oil face, and the oil film wedge face is provided with low side and high-end, and low side caves inward, and is high-end to outer lug, the oil film wedge face be from low side to high-end progressively to the inclined-plane of outer lug; Retaining tank deck rank are the platform to outer lug, and its height to outer process is identical with the high-end height to outer process of oil film wedge face; Store oil is towards sunken inside; Protect the outside that the tank deck rank are located at the oil film wedge face, an end that protects the tank deck rank joins with retaining tank deck rank, its the other end joins with the retaining tank deck rank of the bearing liner of vicinity, protect the tank deck rank and be platform to outer lug, its height to outer process is identical to the height of outer process with the retaining tank deck rank that its two ends are right after, and the tank deck rank of protecting of whole polylith bearing liner form the annular protrusion platform that is higher than store oil face with retaining tank deck rank at the store oil face and the oil film wedge face outside.

The further technological scheme of the utility model is: equal four of the bearing liner that the two sides, front and back of described thrust bearing of turbocharger is provided with.

The utility model further technological scheme is: the degree of depth that the store oil of described bearing liner caves inward towards the low side of the depth ratio oil film wedge face of sunken inside wants dark.

The utility model compared with prior art has following advantage:

1, other part of turbosupercharger need not to do any change, all can use with the utility model assembling.

2, the retaining tank deck rank that are provided with of bearing liner of the present utility model can prevent to flow into next bearing liner through the lubricant oil of the oil film wedge face of the bearing liner of thrust bearing of turbocharger, it can also prevent the pressure release of lubricant oil in the bearing liner outside of thrust bearing of turbocharger, the bearing capacity of the pressure-bearing oil film that forms on thrust bearing of turbocharger like this is enhanced, further improve the bearing capacity of thrust bearing of turbocharger, guaranteed the turbosupercharger reliability of operation.

Below in conjunction with the drawings and specific embodiments detailed structure of the present utility model is further described.

Description of drawings

Accompanying drawing 1 is a structural representation of the present utility model;

Accompanying drawing 2 is the rear view of accompanying drawing 1;

Accompanying drawing 3 is the cutaway view Amplified image along A-A semicircle loop wire of accompanying drawing 1;

Accompanying drawing 4 is the structural representation of the thrust bearing of turbocharger of prior art;

Accompanying drawing 5 is the rear view of accompanying drawing 4.

Embodiment

Shown in accompanying drawing 1 to 3: a kind of thrust bearing of turbocharger, two sides (front is an accompanying drawing 1, and the back is an accompanying drawing 2) is equipped with four bearing liners that are uniformly distributed along the circumference before and after it, and bearing liner comprises oil film wedge face 1, retaining tank deck rank 2, store oil face 3 and protects tank deck rank 4; Oil film wedge face 1 is between retaining tank deck rank 2 and store oil face 3, and oil film wedge face 1 is provided with low side 11 and high-end 12, and low side 11 caves inward, and high-end 12 to outer lug, oil film wedge face 1 be from low side 11 to high-end 12 progressively to the inclined-plane of outer lug; Retaining tank deck rank 2 are the platform to outer lug, and it is high-end 12 identical to the height of outer process to the height of outer process and oil film wedge face 1; Store oil face 3 caves inward, and it is darker than the degree of depth that the low side 11 of oil film wedge face 1 caves inward; Protect the outside that tank deck rank 4 are located at oil film wedge face 1, an end that protects tank deck rank 4 joins with retaining tank deck rank 2, its the other end joins with the retaining tank deck rank of the bearing liner of vicinity, protect tank deck rank 4 and be platform to outer lug, its height to outer process is identical to the height of outer process with the retaining tank deck rank 2 that its two ends are right after, and the tank deck rank 4 of protecting of whole four bearing liners form the annular protrusion platform that is higher than store oil face 3 with retaining tank deck rank 2 at the store oil face 3 and oil film wedge face 1 outside.

The utility model working principle: owing to produce dynamic pressure on the oil film wedge face 1, lubricating oil temperature behind the thrust bearing of turbocharger of flowing through is raise, the rising of oil temperature will make oil body descend, and then bearing capacity is reduced, and the store oil face 3 of the bearing liner of thrust bearing of turbocharger with oil film wedge face 1 outside design by protecting the annular protrusion platform that is higher than store oil face 1 that tank deck rank 4 and retaining tank deck rank 5 constitute, it can prevent to flow into through the lubricant oil of the oil film wedge face 1 of the bearing liner of thrust bearing of turbocharger the next bearing liner of thrust bearing of turbocharger, it can also prevent the pressure release of lubricant oil in the bearing liner outside of thrust bearing of turbocharger, further improves the bearing capacity of thrust bearing of turbocharger.

The utility model is not limited to above-mentioned concrete structure, so long as the thrust bearing of turbocharger that is provided with the annular protrusion platform that is higher than store oil face 3 outside with oil film wedge face 1 at the store oil face 3 of thrust bearing of turbocharger bearing liner just drops within the protection domain of the present utility model.

Claims

1, a kind of thrust bearing of turbocharger, two sides is equipped with the polylith bearing liner that is uniformly distributed along the circumference before and after it, and bearing liner comprises oil film wedge face, retaining tank deck rank and store oil face; The oil film wedge face is between retaining tank deck rank and store oil face, and the oil film wedge face is provided with low side and high-end, and low side caves inward, and is high-end to outer lug, the oil film wedge face be from low side to high-end progressively to the inclined-plane of outer lug; Retaining tank deck rank are the platform to outer lug, and its height to outer process is identical with the high-end height to outer process of oil film wedge face; Store oil is towards sunken inside; It is characterized in that: bearing liner also comprises and protects the tank deck rank, protect the outside that the tank deck rank are located at the oil film wedge face, an end that protects the tank deck rank joins with retaining tank deck rank, its the other end joins with the retaining tank deck rank of the bearing liner of vicinity, protect the tank deck rank and be platform to outer lug, its height to outer process is identical to the height of outer process with the retaining tank deck rank that its two ends are right after, and the tank deck rank of protecting of whole polylith bearing liner form the annular protrusion platform that is higher than store oil face with retaining tank deck rank at the store oil face and the oil film wedge face outside.

2, thrust bearing of turbocharger according to claim 1 is characterized in that: equal four of the bearing liner that the two sides, front and back of described thrust bearing of turbocharger is provided with.

3, thrust bearing of turbocharger according to claim 1 and 2 is characterized in that: the degree of depth that the store oil of described bearing liner caves inward towards the low side of the depth ratio oil film wedge face of sunken inside wants dark.