CN1213238C - Thin metal sheet radial bearing - Google Patents

Abstract

The present invention relates to a thin metal sheet radial bearing which comprises a thin metal sheet for supporting a shaft neck and an assembly part formed by that one end is bent in an assembly groove arranged on the inner surface of a bearing seat and a bending part, wherein the bearing seat surrounds a rotor, and the bending part is formed by the retroflection in the direction where the assembly part is formed for multiple times on the other end. The bending part is folded into a triangle so that the entrance and the exit of compressed liquid are convenient, and accordingly, liquid can be used for cooling to prevent the generation of heat because of friction between a revolving body and a bearing. In addition, the shock damping performance is also good because of the buffer function of the liquid., the bending part can adjust elasticity in a geometric way, and the bending part has high damping action and further stabilizes the rotation of the rotor.

Description

The foil radial bearing

Technical field

The present invention relates to field of bearings.

Background technique

The invention relates to the foil radial bearing of supporting high-speed rotary body, particularly, prevent to guarantee the foil radial bearing of damping performance because friction generates heat about when the solid of rotation low speed rotation.

Fig. 1 represents existing foil radial bearing stereogram, and as seen from the figure, bearing plate is the platy structure that an end curls to a direction.

Foil radial bearing supporting rotating shaft is provided with the department of assembly 11 of foil radial bearing 10 on the bearing support, with reference to Fig. 2 a, 2b and 2c are described.

Fig. 2 a represents existing concise and to the point sectional drawing with turbocompressor of foil radial bearing.Fig. 2 b represents the foil radial bearing stereogram of supporting axis in the existing turbocompressor.Fig. 2 c represents the foil radial bearing profile of supporting axis in the existing turbocompressor.

At first, with reference to Fig. 2 a as can be known, general compressor comprises: the motor case 20 with certain volume; Be arranged at the 1st bearing support 30 and the 2nd bearing support 40 of motor case 20 both sides; The live axle 50 that runs through described bearing support 30,40; The stator that has in motor case 20 61 and be pressed into live axle 50 rotor rotated 62 together, stator 61 and rotor 62 constitute motors 60, wherein, the radial bearing 80 of supporting live axle 50 are arranged on the bearing support 30,40.

Here, radial bearing 80 is exactly a shaft bearing, and radial bearing uses tabular foil radial bearing 10 as shown in Figure 1 usually.

Secondly, with reference to bearing stereogram Fig. 2 b of supporting axis in turbocompressor as can be known, live axle 50 runs through the 1st bearing support 30, but both directly contacts, but the metal sheet radial bearing sheet 10 of the 1st bearing support 30 inner faces is supported live axles 50.At this moment, foil radial bearing 10 is arranged at the inner face of the 1st bearing support 30.For this reason, formed fitting recess 31 at the inner face of the 1st bearing support 30 by certain spacing, and inserted the department of assembly 11 of foil radial bearing 10 in the above.On the 2nd bearing support 40, also formed such structure.

With reference to Fig. 2 c the bonding state of foil radial bearing in bearing support 30,40 described.By among Fig. 2 c as can be known, at described bearing support 30,40 interiorly formed fitting recess 31 by certain spacing, insert the department of assembly 11 of foil radial bearing 10 above it, and the other end of foil radial bearing 10 rides on another adjacent foil radial bearing.By such installation method, described foil radial bearing is not an inner face of being close to bearing support 30,40, supports live axle 50 but float slightly, thereby has the effect of damping.

But there is following shortcoming in existing technology.

At first, in the high speed rotating stage, live axle is subjected to the effect of rotating force, breaks away from before the foil radial bearing, is close on the foil radial bearing always and rotates, and produces very big heat.Also be not suitable in the drive manner of the low speed rotation that continues.

And the cushioning effect that acts on the foil radial bearing of live axle only occurs on the foil radial bearing, and damping efficiency is low thus.

Summary of the invention

Technical problem to be solved by this invention is, a kind of foil radial bearing is provided, and has outstanding live axle damping effect, in the time of can also suppressing low speed rotation simultaneously because the heat that rubs and produce.

In order to solve the problems of the technologies described above, the technical solution used in the present invention is: the foil radial bearing, the foil that comprises the support axle journal, the department of assembly that one end of foil is bent to form, the department of assembly is installed in the fitting recess of the bearing support inner face that surrounds rotor, also comprise on the other end curved part that on the direction that forms the department of assembly, turns back and form for several times.

Described foil radial bearing curved part is converted into triangle

The invention has the beneficial effects as follows: as can be known by above explanation, the curved part that the foil radial bearing of the present invention's design forms because of the opposite ends that has possessed the several department of assembly of turning back, make the discrepancy that is compressed fluid more convenient, thereby can utilize fluid to cool off, prevent between solid of rotation and the bearing owing to friction produces heat, and because the buffer function of fluid, damping performance is also fine.And described curved part can be regulated elasticity in geometry character ground, has very high cushioning effect, makes the rotation of rotor more stable.

Moreover, described curved part is just made by the end of crooked bearing, therefore produces also to be easy to.

Description of drawings

Fig. 1 represents existing foil radial bearing stereogram.

Fig. 2 a represents existing concise and to the point sectional drawing with turbocompressor of foil radial bearing.

Fig. 2 b represents the foil radial bearing stereogram of supporting axis in the existing turbocompressor.

Fig. 2 c represents the foil radial bearing profile of supporting axis in the existing turbocompressor.

Fig. 3 represents the concise and to the point stereogram of foil radial bearing in the embodiments of the invention.

Fig. 4 represents the profile of the foil radial bearing in the embodiments of the invention.

Fig. 5 represents the foil radial bearing sectional view in the another embodiment of the present invention.In the drawings:

10,100: foil radial bearing 11,110: department of assembly

20: 30: the 1 bearing supports of motor case

Bearing support 50 in 40: the 2: live axle

60: motor 61: stator

62: rotor 80: radial bearing

120: curved part 31: fitting recess

Embodiment

Below in conjunction with the drawings and specific embodiments the present invention is described in further detail: Fig. 3 represents the concise and to the point stereogram of foil radial bearing in the embodiments of the invention, as seen from the figure, foil radial bearing 100 forms the tabular of slight curvature on the whole, formed the department of assembly 110 in the fitting recess 31 that is installed on the formation of bearing support inner face identical with the bearing support of compressor on one end, the other end is converted into triangle and has formed curved part 120.

Below, in conjunction with Fig. 4, that is, the profile of the bearing support 30 of turbocompressor, the effect of the foil radial bearing 100 of structure describes to having as above.

As shown in Figure 4, the set-up mode of foil radial bearing only appends and is provided with curved part 120 with identical in the past.

Such curved part 120 has elasticity how much, has the effect of the vibration damper that absorbs the live axle impact that runs through described bearing support 30, with respect to higher damping performance was provided in the past.And, during the live axle low speed rotation, break away from the distance of bearing support 30 inboards by the space size of curved part 120 generations, make the discrepancy that is compressed fluid convenient, because the major part in the fluid all is a refrigeration agent, therefore reduce the heat that friction causes.And fluid can flow into curved part 120 and by in the space of planes in the bearing support of curved part 120 generations, the effect with buffering can improve damping efficiency thus.

Fig. 5 represents to adopt another embodiment's of invention planimetric map.

As shown in Figure 5, have the curved part 120 that bending formed and bent the foil radial bearing 100 that forms for 4 times for 3 times, but this is not limited thereto example, and various variations can be arranged.But its structure will be considered the thickness of foil radial bearing and the diameter of turbocompressor bearing support.

Claims (2)

1. foil radial bearing, the foil that comprises the support axle journal, the department of assembly that one end of foil is bent to form, the department of assembly is installed in the fitting recess of the bearing support inner face that surrounds rotor, it is characterized in that: also comprise on the other end curved part that on the direction that forms the department of assembly, turns back and form for several times.

2. foil radial bearing according to claim 1 is characterized in that: described curved part is converted into triangle.

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