CN201420597Y

CN201420597Y - Ceramic ball bearing turbocharger

Info

Publication number: CN201420597Y
Application number: CN2009200126095U
Authority: CN
Inventors: 薛冰
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-03-31
Filing date: 2009-03-31
Publication date: 2010-03-10
Anticipated expiration: 2019-03-31

Abstract

The utility model relates to a ceramic ball bearing turbocharger, which consists of a compressor casing, a turbo shell, a midbody, a thrust piece, a turbo rotor shaft and ball bearings, which is characterized in that two ball bearings certainly spaced are assembled on the turbo rotor shaft, the balls of each ball bearing are of ceramic balls, the clearance between the inner diameter of the ceramicball bearing and the turbo rotor shaft is 0.03 to 0.04mm, and the clearance between the outer diameter of the ceramic ball bearing and the midbody is 0.04 to 0.05mm. The utility model has the advantages that the power loss during operation is small, the oil consumption of the bearings is small, the required oil flow rate is low, the required condition of lubrication is not high, the working reliability of the bearings is high, the high-efficiency working state can be reached in a short time after startup and the bearing speed is obviously improved.

Description

Ceramic balls bearing turbosupercharger

Technical field

The utility model belongs to a kind of vehicle turbocharger, particularly a kind of ceramic balls bearing turbosupercharger.

Background technique

Current, the used bearing of automobile turbocharger is commonly ball bearing and floating bearing (wherein in the majority with floating bearing), but these two kinds of bearings all exist very important shortcoming.Floating bearing belongs to common hydraulic bearing, and certain clearance is all arranged inside and outside it, and is full of the lubricant oil with pressure in the gap, because the drag effect of lubricant oil can produce bigger power loss in operation process.Simultaneously, when floating bearing rotates, need to drive the floating bearing rotation by the frictional force of lubricant oil, therefore temperature, pressure, lubricating property and the filtering character to lubricant oil all has very high requirement.In case lubricating condition does not reach requirement, will cause direct influence to the reliability of bearing working.Because floating bearing will be subjected to the frictional force of lubricant oil to drive bearing operation, therefore when axle rotated, the rotational speed of bearing axle wanted slow, can not reach the ideal operation state after startup immediately.And ball bearing in use, and the pollutant that the high speed steel wearing and tearing cause all can cause wearing and tearing to raceway inside and outside steel ball itself and the bearing, influences its working life.Ball bearing is because the material restriction is high to used lubricant oil requirement, and poor durability, and seizure resistance is also poor.Power loss is bigger.

The model utility content

The purpose of this utility model provides a kind of ceramic balls bearing turbosupercharger, and power loss is little in the running, and bearing is few with oil mass, required oily flow rate is low, and lubricating condition is less demanding, bearing working reliability height, can the short time reach the efficient operation state after the startup, significantly improve bearing speed simultaneously.

The purpose of this utility model is achieved by the following technical solution: it comprises compressor casing, turbine case, intermediate, thrust piece, turbine rotor shaft, ball bearing, it is characterized in that: assembling has two ball bearings of certain distance on turbine rotor shaft, the ball of ball bearing is a ceramic balls, the gap is the 0.03-0.04 millimeter between ceramic balls bearing bore diameter and the turbine rotor shaft, and the gap is the 0.04-0.05 millimeter between ceramic balls bearing outside diameter and the intermediate.

The gap is the 0.02-0.03 millimeter between each ball of above-mentioned ceramic balls bearing.

The utility model has the advantages that:

1, anti-friction damage ability is strong.Under constant rotational speed, the frictional loss of ceramic bearing lacks 40% than floating bearing.Experiment shows that the bearing rotating speed is fast more, and the antiwear property of ceramic balls bearing shows outstandingly more.Improve working life and reliability, can reach 5 times of plain ball bearing working life.In addition, because the Spielpassung between each parts, under the situation that reduces the intermediate temperature, wear rate reduces, and rotating speed improves.

2, required oil mass is little.The lubricant oil use amount of ceramic balls bearing only is 5% of a floating bearing usefulness oil mass less than 10% of ball bearing usefulness oil mass.In addition, because the stronger seizure resistance of ceramic balls bearing, its required oily flow rate only is 50% of a floating bearing, reach 20% of ball bearing, reduction improves Young's modulus to the requirement of bearing lubrication condition, and power loss in use is far smaller than ball bearing.

3. it is fast to enter the efficiency operation state.The utility model can make ceramic balls bearing turbosupercharger enter the efficient operation state in the shortest time because the effect of matching gap between each parts is not influenced by external drag.

4, durability is strong.The ceramic balls bearing has no special requirements to the lubricating condition such as temperature, pressure, lubricating property and filtering character of lubricant oil.Prove that by the machine oil of reusing lubricant oil and polluted the durability of ceramic balls bearing is floating bearing head and shoulders above by the high speed steel powder.

5, machine is highly sensitive.Because what the utility model adopted is the duplex bearing form, longer service life, sensitivity is higher, and between two ceramic balls bearing bore diameters and the turbine rotor shaft, all have the gap between two ceramic balls bearing outside diameters and the intermediate, therefore machine is highly sensitive, and rotating speed is faster, has improved the speed of bearing, the utility model bearing rotating speed each second can reach 150,000 commentaries on classics, reaches 1.5 times of plain ball bearing.And then improved the pressurized machine high speed performance.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is two ceramic balls Bearing Installation of the utility model part-structure enlarged diagram.

Fig. 3 is the utility model and ball bearing structure, floating bearing structure rotating speed correlation curve schematic representation.

Fig. 4 is the utility model and ball bearing structure, floating bearing structure power loss correlation curve schematic representation.

Embodiment

See Fig. 1,2, the utility model concrete structure is as follows: by conventional structure assembling compressor casing 1, turbine case 13, intermediate 3, thrust piece 2 and the seal ring 7 of prior art.On turbine rotor shaft 11, be positioned at intermediate endoporus two ends and assemble ceramic balls bearing 10,12 respectively.The unsteady spacer sleeve 4 of assembling is assembled jump ring 6 respectively in the outer end of ceramic balls bearing 10,12 between ceramic balls bearing 10,12.The gap is the 0.02-0.03 millimeter between each ceramic balls 8 of ceramic balls bearing 10,12, the gap is the 0.03-0.04 millimeter between internal diameter 9 of ceramic balls bearing 10,12 (being the bearing inner sleeve internal diameter) and the turbine rotor shaft 11, and the gap is the 0.04-0.05 millimeter between external diameter 5 of ceramic balls bearing 10,12 (being the bearing outside external diameter) and intermediate 3 inner hole walls.

See Fig. 3, ceramic balls bearing structure of the present utility model and ball bearing structure, the contrast of floating bearing structure, the utility model rotating speed significantly improves.

See Fig. 4, ceramic balls bearing structure of the present utility model and ball bearing structure, the contrast of floating bearing structure, power loss significantly reduces.

Claims

1, a kind of ceramic balls bearing turbosupercharger, it comprises compressor casing, turbine case, intermediate, thrust piece, turbine rotor shaft, ball bearing, it is characterized in that: assembling has two ball bearings of certain distance on turbine rotor shaft, the ball of ball bearing is a ceramic balls, the gap is the 0.03-0.04 millimeter between ceramic balls bearing bore diameter and the turbine rotor shaft, and the gap is the 0.04-0.05 millimeter between ceramic balls bearing outside diameter and the intermediate.

2, ceramic balls bearing turbosupercharger according to claim 1, it is characterized in that: the gap is the 0.02-0.03 millimeter between each ball of ceramic balls bearing.