CN205278110U

CN205278110U - Booster bearing arrangement that floats

Info

Publication number: CN205278110U
Application number: CN201521039057.9U
Authority: CN
Inventors: 管奇贤; 郭志杰; 周婷婷; 张恒; 刘�东; 赵福成; 王瑞平
Original assignee: Zhejiang Geely Holding Group Co Ltd; Zhejiang Geely Luoyou Engine Co Ltd
Current assignee: Ningbo Geely Royal Engine Components Co Ltd
Priority date: 2015-12-14
Filing date: 2015-12-14
Publication date: 2016-06-01
Anticipated expiration: 2025-12-14

Abstract

The utility model discloses a booster bearing arrangement that floats, booster include turbine, pinch roller and rotation axis, are equipped with footstep bearing, thrust ring, floating bearing and booster midbody on the rotation axis, and the booster midbody is polygonized structure to floating bearing fuel feeding, unsteady bearing inner ring, is equipped with the fuel feeding hole on the floating bearing, the utility model discloses a regular polygon's unsteady bearing inner ring structure can effectively increase the clearance distance who floats between bearing inner ring face and the rotation axis surface, but the machine oil extrusion force in the greatly reduced clearance weakens the whilring motion of lubricating oil to obviously reduce booster oil film noise, improved the sound quality of booster.

Description

A kind of supercharger floating bearing structure

Technical field

This utility model relates to turbo-charger technical field, refers more particularly to a kind of supercharger floating bearing structure that can effectively reduce supercharger oil film noise.

Background technology

Along with energy-conservation increasingly strict with environmental requirement, promote engine efficiency and the Main way becoming Development of Auto Engine Technology is discharged in reduction, owing to supercharger technology has raising engine efficiency, reduce fuel oil consumption, the advantage of emissions-reducing, the research and development of high-performing car supercharger are attached great importance in countries in the world, and turbocharger widely uses on automobile. But the automobile of employing supercharger is when normally travelling, supercharger can produce various noise, and wherein ubiquitous supercharger oil film sound is exactly than more prominent one.

The noise kind of supercharger, can be divided into following several sound according to sense of hearing: synchronize noise, subsynchronous noise (hereinafter referred to as supercharger oil film sound), BPF noise, Surgenoise (surge noise) etc.

The method solving supercharger noise on open market is to formulate corresponding measure for different noise classifications, such as controls G-value, optimizes design bearing (bearing clearance), increases impeller blade number etc.

Owing to the motion of the lubrication of supercharger, bearing is very complicated, the method solving supercharger oil film sound more common in industry is to adjust floating bearing gap, particularly adjust the inner and outer diameter gap of floating bearing, this method is relatively easy, it is also more convenient to implement, but there will be again all kinds of high order noise in situation improperly adjusting, therefore, reduce noise by adjusting the gap of floating bearing, adjust difficulty and poor effect.

Utility model content

This utility model mainly solves the existing mode reducing supercharger oil film sound by adjusting floating bearing gap and there is the technical problem adjusting difficulty and poor effect; Provide a kind of supercharger floating bearing structure that can effectively reduce supercharger oil film noise.

In order to solve the technical problem of above-mentioned existence, this utility model mainly adopts following technical proposals:

A kind of supercharger floating bearing structure of the present utility model, for turbocharger, described turbocharger includes turbine, pinch roller and both rotating shafts of connection, described rotating shaft is provided with thrust bearing, thrust ring, floating bearing and booster intermediate body, booster intermediate body is to floating bearing fuel feeding, floating bearing internal ring is polygonized structure, the rounded structure of floating bearing outer shroud and matching with described booster intermediate body inner chamber, floating bearing is provided with multiple oil supplying hole, adopt ring structure in polygonal floating bearing, can effectively increase the clearance distance between floating bearing inner ring surface and rotating shaft surface, without changing charger central parts, bigger clearance distance, the machine oil extruding force in gap can be substantially reduced, weaken the whirling motion of lubricating oil, thus significantly reducing supercharger oil film noise, improve the sound quality of supercharger.

As preferably, described oilhole is evenly arranged along floating bearing internal ring and corresponding with the polygon facet of floating bearing internal ring, it is uniformly distributed and the oilhole of corresponding floating bearing inner ring surface can provide lubricating oil timely and effectively, it is ensured that the sufficient lubrication of floating bearing inner ring surface and reliability service.

As preferably, described floating bearing is regular hexagon structure, the oilhole of described floating bearing is six, the crest line of oilhole axis correspondence floating bearing internal ring, by widening the distance of fuel feed hole and rotating shaft surface, thus significantly reducing the whirling motion degree of lubricating oil so that supercharger oil film noise obtains effective reduction.

The beneficial effects of the utility model are: adopt ring structure in polygonal floating bearing to replace ring structure in the floating bearing of circle, can effectively increase the clearance distance between floating bearing inner ring surface and rotating shaft surface, without changing charger central parts, bigger clearance distance, in particular for the larger gap at oilhole place, the machine oil extruding force in gap can be substantially reduced, weaken the whirling motion of lubricating oil, thus significantly reducing supercharger oil film noise, improve the sound quality of supercharger.

Accompanying drawing explanation

Fig. 1 is supercharger structure schematic diagram of the present utility model.

Fig. 2 is the circular floating bearing structural representation of prior art.

Fig. 3 is regular hexagon floating bearing structural representation of the present utility model.

Fig. 4 is the supercharger noise spectrum test figure of typical circular floating bearing.

Fig. 5 is the supercharger noise spectrum test figure of this utility model floating bearing.

1. turbine in figure, 2. pinch roller, 3. rotating shaft, 4. thrust bearing, 5. thrust ring, 6. floating bearing, 7. oil supplying hole.

Detailed description of the invention

By the examples below, and in conjunction with accompanying drawing, the technical solution of the utility model is described in further detail.

Embodiment: a kind of supercharger floating bearing structure of the present embodiment, for turbocharger, as shown in Figure 1, turbocharger includes turbine 1, pinch roller 2 and both rotating shafts 3 of connection, rotating shaft is provided with thrust bearing 4, thrust ring 5, floating bearing 6 and booster intermediate body, booster intermediate body is to floating bearing fuel feeding, floating bearing internal ring is regular hexagon structure, the rounded structure of floating bearing outer shroud and matching with described booster intermediate body inner chamber, on floating bearing, design has six oil supplying holes 7, oilhole is evenly arranged along floating bearing internal ring, the crest line of oilhole axis correspondence floating bearing internal ring.

The structural design of regular hexagon floating bearing, the inscribed circle radius on its interior six limits is equal with the radius of typical circular floating bearing, such regular hexagon floating bearing is greater than circular floating bearing at real radius R as shown in Figure 2 at the real radius r of position as shown in Figure 3, i.e. r > R, so, rotating shaft is when floating bearing inner high speed rotates to position shown in Fig. 3, the machine oil of the lubricating oil cavity within floating bearing can be subject to the extruding force of the rotating shaft of high speed rotating, according to active force and counteracting force, the machine oil stirred that is squeezed can extrude the rotating shaft of high speed rotating equally, position shown in Fig. 3 is 360 �� of one of them positions rotated, therefore the lubricating oil counteracting force suffered by rotating shaft is less than typical circular floating bearing, in continuous rotary course, this power and the continual existence of counteracting force, thus significantly reducing the whirling motion (stirring) of lubricating oil, macroscopic view presentation is exactly that the oil film noise that sends of regular hexagon floating bearing is significantly less than oil film noise produced by typical circular floating bearing, thus improving the sound quality of supercharger

The vibration of mechanism bearing film and the rotor that produce according to oil film sound rotate and cause, the feature of supercharger oil film sound is: its frequency is 0.4-0.5 times that turbine turns frequency, above-mentioned conclusion can also be drawn from frequency spectrum, such as the spectrum measurement figure that Fig. 4 is the supercharger noise using typical circular floating bearing, Fig. 5 is the spectrum measurement figure of the supercharger noise using floating bearing of the present utility model, both contrasts, it appeared that regular hexagon floating bearing structure has very big effect to reducing supercharger oil film noise, effectively weaken supercharger oil film sound, improve electromotor sound quality.

In description of the present utility model, technical term " on ", D score, " front ", " afterwards ", " interior ", " outward " etc. represent that direction or position relationship are based on direction shown in the drawings or position relationship, it is for only for ease of description and understands the technical solution of the utility model, described above is not that this utility model has been done restriction, this utility model is also not limited to the citing of described above, the change that those skilled in the art are made in essential scope of the present utility model, remodeling, increase or replace, it is regarded as protection domain of the present utility model.

Claims

1. a supercharger floating bearing structure, for turbocharger, described turbocharger includes turbine (1), pinch roller (2) and connects both rotating shafts (3), described rotating shaft is provided with thrust bearing (4), thrust ring (5), floating bearing (6) and booster intermediate body, described booster intermediate body is to floating bearing fuel feeding, it is characterized in that: described floating bearing internal ring is polygonized structure, the rounded structure of floating bearing outer shroud and matching with described booster intermediate body inner chamber, floating bearing is provided with mean for oilhole (7).

2. a kind of supercharger floating bearing structure according to claim 1, it is characterised in that: described oil supplying hole (7) is evenly arranged along described floating bearing (6) internal ring and corresponding with the polygon facet of floating bearing internal ring.

3. a kind of supercharger floating bearing structure according to claim 1 and 2, it is characterized in that: described floating bearing (6) is in regular hexagon structure, the oil supplying hole (7) of described floating bearing is six, the crest line of oil supplying hole axis correspondence floating bearing internal ring.