CN217682810U - Air bearing, rotor assembly, compressor and heating and ventilation equipment - Google Patents

Abstract

The utility model discloses an air supporting bearing, rotor assembly, compressor and warm equipment that leads to, air supporting bearing is including the mount pad, ripples paper tinsel and the top paper tinsel that stack gradually, first ripples paper tinsel is including the first ripples paper tinsel and the second ripples paper tinsel of range upon range of setting, and first ripples paper tinsel includes first ripple section, and the second ripples paper tinsel includes second ripple section, first ripple section with second ripple section is followed air supporting bearing's circumference dislocation. According to the utility model discloses air bearing can support the top foil through first ripple section and the cooperation of second ripple section, and the structure of ripple section dislocation, frictional force when can increasing between first ripples paper tinsel and the second ripples paper tinsel and warp can improve air bearing's loading capacity.

Description

Air bearing, rotor assembly, compressor and heating and ventilation equipment

Technical Field

The utility model relates to a bearing technical field, in particular to air bearing, including this air bearing's rotor assembly, including this air bearing's compressor and including this air bearing's warm equipment of leading to.

Background

The air bearing is a dynamic pressure bearing which uses gas in the surrounding environment as a lubricant and uses foil as an elastic support element, and has been commercialized and widely used in air refrigeration systems of aircraft since the 20 th century in foreign countries. The air bearing in the related art has limited bearing capacity, is easy to deform and has lower applicable load.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an air supporting bearing can improve air supporting bearing's load-carrying capacity.

Another object of the present invention is to provide a rotor assembly, which includes the above-mentioned air bearing.

Another object of the present invention is to provide a compressor, which includes the above-mentioned air-floating bearing or the above-mentioned rotor assembly.

Another object of the present invention is to provide a heating and ventilation device, which includes the air bearing or the rotor assembly or the compressor.

According to the utility model discloses air bearing, including the mount pad, ripples foil and the top foil that stack gradually, the ripples foil is including the first ripples foil and the second ripples foil of range upon range of setting, and first ripples foil includes first ripple section, and the second ripples foil includes the second ripple section, first ripple section with the second ripple section is followed air bearing's circumference dislocation.

According to the utility model discloses air bearing can support the top foil through first ripple section and the cooperation of second ripple section, and the structure of ripple section dislocation, and frictional force when warping between first ripples foil and the second ripples foil can be increased, air bearing's load-carrying capacity can be improved.

In addition, according to the air-bearing of the above embodiment of the present invention, the following additional technical features may also be provided:

optionally, the first corrugated foil further includes a first connection section, the second corrugated foil further includes a second connection section, the first connection section and the first corrugated section are staggered and connected in the circumferential direction of the air bearing, the second connection section and the second corrugated section are staggered and connected in the circumferential direction of the air bearing, and the peaks of the first corrugated section are stacked with the connection section of the second corrugated foil.

Optionally, at least two first corrugation segment elevations in the first corrugated foil are different.

Optionally, at least two second corrugation segment elevations in the second bump foil are different.

Optionally, the first and second corrugated sections are different in height of the protrusions.

Optionally, the first and second corrugated segments are configured as circular arcs, the first and second corrugated segments having different radii.

Optionally, the first corrugated segment of the first corrugated foil and the second corrugated segment of the second corrugated foil are both convex toward the mount; or both the first corrugated segment of the first corrugated foil and the second corrugated segment of the second corrugated foil are convex towards the top foil.

Optionally, the second wave foil is closer to the top foil than the first wave foil in the stacking direction, and the wave foils further include at least one third wave foil, and the third wave foil is disposed between the first wave foil and the second wave foil, between the first wave foil and the mounting base, or between the second wave foil and the top foil.

Optionally, a positioning groove is arranged on the mounting seat.

Optionally, one end of each of the first bump foil and the second bump foil is inserted into one of the positioning grooves.

Optionally, one end of each of the first and second bump foils is inserted into a different positioning groove.

Optionally, a positioning notch is formed in the inner side wall of the positioning groove, a positioning pin embedded into the positioning notch is arranged on the mounting seat, and the positioning pin is configured to position the bump foil.

Optionally, one end of the first wave foil and one end of the second wave foil are both connected to the mounting seat, and the other end of the first wave foil and the other end of the second wave foil extend in the same direction or in opposite directions along the circumferential direction of the air bearing.

Optionally, one end of the first bump foil and one end of the top foil are both connected to the mounting seat, and the other end of the first bump foil and the other end of the top foil extend in the same or opposite directions along the circumferential direction of the air bearing.

Optionally, one end of the second wave foil and one end of the top foil are both connected to the mounting seat, and the other end of the second wave foil and the other end of the top foil extend in the same direction or in opposite directions along the circumferential direction of the air bearing.

Optionally, the top foil is stacked by a first top foil and a second top foil, one end of the first top foil and one end of the second top foil are both connected to the mounting seat, and the other end of the first top foil and the other end of the second top foil extend in the same or opposite directions along the circumferential direction of the air bearing.

Optionally, the air bearing is a radial air bearing or an axial air bearing.

According to the utility model discloses compressor, including aforementioned air supporting bearing.

According to the utility model discloses rotor assembly, rotor assembly includes the rotor, rotor assembly still includes: the radial air bearing is sleeved on the periphery of the rotor, the radial air bearing is based on the air bearing, and the mounting seat, the wave foil and the top foil of the radial air bearing are sequentially stacked from outside to inside along the radial direction of the rotor; the axial air bearing is matched with the rotor, the axial air bearing is based on the air bearing, and the mounting seat, the wave foil and the top foil of the axial air bearing are sequentially stacked along the axial direction of the rotor.

The compressor according to the embodiment of the utility model comprises the air bearing; or a rotor assembly as previously described.

The heating and ventilation equipment according to the embodiment of the utility model comprises the air bearing; or a rotor assembly as described above; or include the aforementioned compressor.

Drawings

Fig. 1 is a schematic view of an air bearing according to an embodiment of the present invention.

Fig. 2 is a partially enlarged schematic view of the area circled D in fig. 1.

Fig. 3 is a schematic diagram showing the expansion of the first wave foil or the second wave foil of the air bearing according to an embodiment of the present invention.

Fig. 4 is a schematic view of a rotor assembly according to an embodiment of the present invention.

Reference numerals are as follows:

the rotor assembly 10, the rotor 11, the air bearing 12, the radial air bearing 12b, the axial air bearing 12a, the mounting seat 121, the positioning groove 1201, the positioning notch 1202, the positioning pin 1203, the first bump foil 122a, the first corrugated section 1221a, the first connecting section 1222a, the second bump foil 122b, the second corrugated section 1221b, the second connecting section 1222b, and the top foil 123.

Detailed Description

China is the biggest world refrigeration product production, consumption and export country, and the refrigeration energy consumption accounts for 15% of the total social energy consumption. During summer peak hours, the increase of refrigeration load of air conditioners and the like not only brings heavy burden to the power grid, but also generates a large amount of greenhouse gas emission. Therefore, the promotion of green high-efficiency refrigeration is an important and urgent need for promoting energy conservation and emission reduction and coping with climate change in various countries.

In the context of current "carbon neutralization, carbon peaking," low carbon refrigeration equipment must be developed. The core component of the refrigeration system is a refrigeration compressor, in the conventional refrigeration compressor, a lubricating medium of a sliding bearing is lubricating oil, but the lubricating medium has high viscosity, can generate high friction power consumption at high rotating speed, and in addition, the existence of the lubricating oil can influence the heat exchange effect of a heat exchanger after long-term use, so that the performance of the refrigeration system is reduced. The magnetic suspension bearing has the advantages of low friction loss and good stability, but the cost is higher, and the advantages are not obvious in the application of small and medium-sized compressors. The dynamic pressure air bearing has the advantages of high rotating speed, high efficiency and low friction loss, and is very suitable for small and medium-sized compressors.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary intended for explaining the present invention, and should not be construed as limiting the present invention.

As shown in fig. 1 and 2, the air bearing 12 according to the embodiment of the present invention includes a mounting seat 121, a wave foil, and a top foil 123, and the mounting seat 121, the wave foil, and the top foil 123 are sequentially stacked. The wave foil includes a first wave foil 122a and a second wave foil 122b, the first wave foil 122a includes a first corrugated section 1221a, the second wave foil 122b includes a second corrugated section 1221b, the first wave foil 122a may include a plurality of first corrugated sections 1221a arranged along the circumferential direction of the air bearing 12, and the second wave foil 122b may include a plurality of second corrugated sections 1221b arranged along the circumferential direction of the air bearing 12. The first corrugated foil 122a and the second corrugated foil 122b are stacked between the mount 121 and the top foil 123, and the first corrugated section 1221a and the second corrugated section 1221b are offset in the circumferential direction of the air bearing 12, that is, the first corrugated section 1221a and the second corrugated section 1221b are not directly opposite to each other in the stacking direction.

According to the utility model discloses air bearing 12 owing to set up a plurality of ripples paper tinsels, can improve the supporting effect to top paper tinsel 123 through a plurality of ripples paper tinsels to can improve the displacement range of top paper tinsel 123 for mount pad 121, moreover, because first ripple section 1221a and second ripple section 1221b along air bearing 12's circumference dislocation, like this, can strengthen the supporting effect to the countershaft, thereby improve air bearing 12's bearing capacity.

It should be noted that the above description about the misalignment of the first corrugated section 1221a and the second corrugated section 1221b along the circumferential direction of the air bearing 12 refers to the matching condition of the first wave foil 122a and the second wave foil 122b when the air bearing 12 is not used, for example, when the top foil 123 is matched with the rotating shaft and the rotating shaft is not rotated; or when the air bearing 12 is not engaged with the shaft.

It should be noted that the present invention describesbase:Sub>A first directionbase:Sub>A-base:Sub>A,base:Sub>A second direction B-B, andbase:Sub>A third direction (refer to the direction perpendicular to the paper surface in fig. 1), wherein the first direction in the present invention refers to the stacking direction from the mounting seat 121 to the top foil 123, the second direction refers to the circumferential direction of the air bearing 12, and the third direction refers to the direction perpendicular to the first direction and the second direction. Taking a radial bearing as an example, the first direction may be a radial direction of the air bearing 12, the second direction may be a circumferential direction of the air bearing 12, and the third direction may be an axial direction of the air bearing 12. Taking an axial bearing as an example, the first direction may be an axial direction of the air bearing 12, the second direction may be a circumferential direction of the air bearing 12, and the third direction may be a radial direction of the air bearing 12.

As shown in fig. 2, in some embodiments of the present invention, the first corrugated foil 122a further includes a first connecting section 1222a, the second corrugated foil 122b further includes a second connecting section 1222b, the first connecting section 1222a and the first corrugated section 1221a are staggered along the circumference of the air bearing 12, the second connecting section 1222b and the second corrugated section 1221b are staggered along the circumference of the air bearing 12, and the wave crest of the first corrugated section 1221a is stacked with the connecting section of the second corrugated foil 122 b. The peaks of the first corrugated segment 1221a are stacked with the second connecting segments 1222 b. When the top foil 123 is displaced toward the mounting seat 121 during the use of the air bearing 12, the combination of the first and second wave foils 122a and 122b can provide support for the top foil 123, and the first and second wave foils 122a and 122b can simultaneously provide support force for the top foil 123, so as to maintain the dynamic balance of the top foil 123, thereby improving the load capacity of the air bearing 12 and improving the stability of the air bearing 12 during the operation.

As shown in fig. 2, in some embodiments of the present invention, the peak of each first corrugated section 1221a is stacked with the second connecting section 1222 b. In this way, the supporting force provided by the first wave foil 122a and the second wave foil 122b to the top foil 123 is uniform, so that the deformation uniformity of each region of the top foil 123 can be satisfied, and the airflow distribution uniformity between the top foil 123 and the rotating shaft can be also made to improve the air suspension effect on the rotating shaft, so that the rotating shaft can be made to rotate stably.

In other embodiments of the present invention, a portion of the first corrugated section 1221a on the first bump foil 122a is opposite to the second connecting section 1222b, and another portion of the corrugated section on the first bump foil 122a is opposite to the second corrugated section 1221b. When the top foil 123 takes place to warp, first ripples foil 122a and second ripples foil 122b all can provide the holding power to top foil 123, simultaneously, because reasons such as gravity, preparation precision, lead to the pivot can have unstable problem in the rotation in-process, the utility model discloses in to first ripples foil 122a and second ripples foil 122 b's setting, can overcome the influence of aspects such as gravity, the preparation precision of pivot, further improve the stability of pivot.

Alternatively, each adjacent two first corrugated segments 1221a in the first bump foil 122a may be opposite to the second connecting segment 1222b, and the other may be opposite to the second corrugated segment 1221b. Of course, other forms can be adopted in the present invention, and the above description is only for convenience of understanding the technical solution of the present invention, and is not a limitation to the scope of the present invention.

In other embodiments of the present invention, the first corrugated section 1221a is stacked with the second corrugated section 1221b, and the peak of the first corrugated section 1221a is offset from the peak of the second corrugated section 1221b along the circumferential direction of the air bearing 12. Thereby providing more support points for the top foil 123 to improve the support of the top foil 123.

For example, the second corrugated section 1221b may be provided to have a size in the second direction larger than that of the first corrugated section 1221a, and when the first corrugated section 1221a is stacked with the second corrugated section 1221b, the first corrugated section 1221a is biased to one side of the second corrugated section 1221b in the second direction. Each of the first corrugated segments 1221a may be stacked with one of the second corrugated segments 1221b, or a plurality of the first corrugated segments 1221a may be stacked with one of the second corrugated segments 1221b.

In some embodiments of the present invention, the first bump foil 122a is disposed between the second bump foil 122b and the mounting seat 121. When the top foil 123 is deformed during use, a force is first applied to the first wave foil 122a, and due to the stacked arrangement of the first wave foil 122a and the second wave foil 122b, the force applied to the first wave foil 122a by the top foil 123 is also transmitted to the second wave foil 122b, so as to provide support for the top foil 123.

In other embodiments of the present invention, the first bump foil 122a is disposed between the second bump foil 122b and the top foil 123. When the top foil 123 is deformed during use, a force is applied to the second bump foil 122b first, and due to the stacked arrangement of the first bump foil 122a and the second bump foil 122b, the force applied to the second bump foil 122b by the top foil 123 will also be transmitted to the first bump foil 122a, thereby providing support for the top foil 123.

As shown in FIG. 2, in some embodiments of the present invention, the first connecting segment 1222a and the second connecting segment 1222b may be configured as straight segments extending along the circumference of the air bearing 12. Therefore, the deformation position of the wave foil can be effectively restrained, and the wave foil is prevented from being deformed complicatedly due to the deformation of the connecting section, so that the top foil 123 is stably supported.

Of course, the first connecting segment 1222a and the second connecting segment 1222b of the present invention may also be disposed in an arc shape, for example, the first connecting segment 1222a may be disposed in an arc shape extending along the circumferential direction of the air bearing 12, the first connecting segment 1222a may be an arc shape protruding in the same direction as the corrugated segment, or an arc shape protruding in the opposite direction to the first corrugated segment 1221a, wherein the radius of curvature of the first connecting segment 1222a may be smaller than the radius of curvature of the first corrugated segment 1221a, and the protruding height of the first connecting segment 1222a is lower than the protruding height of the first corrugated segment 1221 a.

In addition, it should be noted that the protrusion height of the present invention refers to the height of the corresponding structure relative to the connection line between the two ends of the corresponding structure in the cross section of the corresponding structure, wherein the connection line is the connection line along the circumferential direction of the air bearing 12, for example, for the radial air bearing 12b, the connection line is an arc line taking the axis of the air bearing 12 as the center; for the axial air bearing 12a, the line is a line perpendicular to the axis of the air bearing 12. The two-end connecting line may be a straight line connecting the two ends.

In some embodiments of the present invention, the protruding height of at least two first corrugation sections 1221a in the first corrugation foil 122a is different, so that the form of locally increasing the supporting height of the opposite vertex foil 123 can be realized to satisfy different load requirements, so that when the circumferential load of the air bearing 12 is not completely consistent, the load effect on the rotating shaft can still be satisfied, and the rotational stability of the rotating shaft is improved.

Further, at least two first corrugated sections 1221a are arranged in a staggered manner along the circumferential direction of the air bearing 12, that is, in every adjacent plurality of first corrugated sections 1221a along the circumferential direction of the air bearing 12, the heights of the first corrugated sections 1221a located at two sides are higher or lower than the height of the first corrugated section 1221a located at the middle. Thereby, the stability of the top foil 123 can be maintained, and the stability can be achieved when the top foil 123 is positioned at different displacements, so as to improve the stability of the air film between the top foil 123 and the rotation shaft. Wherein the top foil 123 is supported by a higher portion of the corrugated sections when no load is applied, and is supported by more of the first corrugated sections 1221a when the top foil 123 moves a certain displacement towards the mounting seat 121, and the top foil 123 can be supported by a plurality of corrugated foils when the top foil 123 continues to move a certain displacement towards the mounting seat 121.

Likewise, the second bump foil 122b may be provided such that at least two of the second corrugated sections 1221b have different heights of protrusions. Further, at least two second bellows sections 1221b may be staggered along the circumferential direction of the air bearing 12.

In some embodiments of the present invention, the height of the first and second corrugated sections 1221a and 1221b is different, so that the first and second corrugated foils 122a and 122b have different structural strength, thereby facilitating stable support of the top foil 123.

Specifically, the first bump foil 122a is disposed between the second bump foil 122b and the mounting seat 121, and the protrusion height H1 of the first corrugated section 1221a is smaller than the protrusion height H2 of the second corrugated section 1221b. Therefore, the deformation of the first and second corrugated foils 122a and 122b can be stabilized, and particularly, when the first corrugated section 1221a supports the second connecting section 1222b, the first corrugated section 1221a with smaller protrusion height has a larger supporting effect, and can provide different supporting forces for different loads of the air bearing 12, so as to maintain the stability of the air bearing 12.

Of course, in the present invention, the protrusion height H1 of the corrugated section of the first bump foil 122a may be set to be greater than or equal to the protrusion height H2 of the corrugated section of the second bump foil 122 b.

In some embodiments of the present invention, the first bump foil 122a is disposed between the second bump foil 122b and the mounting seat 121, and the size of the first connecting section 1222a in the circumferential direction of the air bearing 12 is larger than the size of the second connecting section 1222b in the circumferential direction of the air bearing 12. So that the first bump foil 122a can provide better supporting effect to maintain the stability of the air bearing 12 under different loads.

Of course, in the present invention, the size of the first connecting section 1222a along the circumferential direction of the air bearing 12 may be set to be smaller than or equal to the size of the second connecting section 1222b along the circumferential direction of the air bearing 12.

In some embodiments of the present disclosure, first corrugated section 1221a and second corrugated section 1221b are configured as circular arcs, and the radii of first corrugated section 1221a and second corrugated section 1221b are different.

In some embodiments of the present invention, the first bump foil 122a is disposed between the second bump foil 122b and the mounting seat 121, the first corrugated section 1221a and the first corrugated section 1221a are configured in a circular arc shape with a middle portion protruding toward the top foil 123, and a radius R1 of the first corrugated section 1221a is smaller than a radius R2 of the second corrugated section 1221b. Therefore, the deformation of the first bump foil 122a and the second bump foil 122b can be stabilized, and particularly, when the first corrugated section 1221a supports the second connecting section 1222b, the first bump foil 122a with a smaller radius has a greater supporting effect, and can provide different supporting forces for different loads of the air bearing 12, so as to maintain the stability of the air bearing 12.

In some embodiments of the present invention, the first corrugated section 1221a of the first corrugated foil 122a and the second corrugated section 1221b of the second corrugated foil 122b are both convex toward the mount 121. The first bump foil 122a is disposed between the second bump foil 122b and the mounting seat 121. When the top foil 123 is deformed during use, a force is first applied to the first wave foil 122a, and due to the stacked arrangement of the first wave foil 122a and the second wave foil 122b, the force applied by the top foil 123 to the second wave foil 122b is also transmitted to the first wave foil 122a, so as to provide support for the top foil 123.

In addition, it is also possible to bulge both the first corrugated section 1221a of the first bump foil 122a and the second corrugated section 1221b of the second bump foil 122b toward the top foil 123. The first bump foil 122a is provided between the second bump foil 122b and the mount 121. When the top foil 123 is deformed during use, a force is first applied to the second wave foil 122b, and due to the stacked arrangement of the first wave foil 122a and the second wave foil 122b, the force applied to the second wave foil 122b by the top foil 123 is also transmitted to the first wave foil 122a, so as to provide support for the top foil 123.

Of course, the present invention is not limited to two wave foils, and in some embodiments of the present invention, the second wave foil 122b is closer to the top foil 123 than the first wave foil 122a along the stacking direction, the wave foils may further include a third wave foil, the third wave foil may include one or more wave foils, the first wave foil 122a is disposed between the second wave foil 122b and the mounting seat 121, and the third wave foil may be disposed between the first wave foil 122a and the second wave foil 122b, between the first wave foil 122a and the mounting seat 121, and/or between the second wave foil 122b and the top foil 123.

In some embodiments of the present invention, optionally, a positioning groove 1201 is disposed on an inner side surface of the mounting seat 121, the inner side surface of the mounting seat 121 is a surface of the mounting seat 121 opposite to the top foil 123, and the end portions of the first wave foil 122a and the second wave foil 122b are inserted and fixed in one positioning groove 1201. The positioning groove 1201 can stably mount the bump foil on the mounting seat 121, and the stability of the bump foil is effectively improved. By installing a plurality of bump foils in the same positioning groove 1201, the installation efficiency of the plurality of bump foils can be improved.

Of course, in the present invention, the ends of the first bump foil 122a and the second bump foil 122b may be respectively inserted into different positioning grooves 1201. In this way, the mutual interference among the plurality of bump foils can be reduced, the deformation mode of the bump foils can be controlled, and the stability and the load capacity of the air bearing 12 can be improved.

Wherein, can set up the connection piece that extends towards mount pad 121 along first direction in the one end of first ripples foil 122a and second ripples foil 122b, peg graft to the constant head tank 1201 in through the connection piece, realize the installation to the ripples foil.

In addition, in order to further improve the stability of the wave foil installation, the utility model discloses in can set up locating pin 1203 and come the fixed of wave foil, that is to say utilize locating pin 1203 to fix a position the aforesaid connection piece. As shown in fig. 2, in some embodiments of the present invention, a positioning groove 1201 is disposed on the inner circumferential surface of the mounting seat 121, a positioning notch 1202 is disposed on the inner sidewall of the positioning groove 1201, a positioning pin 1203 embedded in the positioning notch 1202 is disposed on the mounting seat 121, and the positioning pin 1203 is configured to position the bump foil. So that the mounting efficiency and stability of the top foil 123 and the bump foil can be improved.

The utility model discloses in also can set up the constant head tank 1201 and fix a position top foil 123, likewise, can set up the connection piece that extends towards mount pad 121 along the first direction in the one end of top foil 123, peg graft the constant head tank 1201 through the connection piece in, realize the installation to top foil 123. One end of the bump foil and one end of the top foil 123 are fixedly connected to the mounting seat 121, and the top foil 123 and the bump foil extend in opposite directions in the circumferential direction of the air bearing 12. Additionally, the utility model discloses a wave paper tinsel can include the multilayer to two-layer wave paper tinsel is the example, can all extend the expansion end of two-layer wave paper tinsel towards the same direction along the circumference of air supporting 12, also can extend the expansion end of two-layer wave paper tinsel respectively along the circumference of air supporting 12 towards opposite direction.

In some embodiments of the present invention, one end of the first bump foil 122a and one end of the second bump foil 122b are both connected to the mounting seat 121, and the other end of the first bump foil 122a and the other end of the second bump foil 122b extend in the same or opposite directions along the circumferential direction of the air bearing 12. The utility model discloses in through can set first ripples foil 122a and second ripples foil 122b to the syntropy and extend, can be convenient for first ripples foil 122a and second ripples foil 122b stable deformation, improve the supporting role of ripples foil to top foil 123, when first ripples foil 122a and second ripples foil 122b extend towards opposite direction, can further improve the frictional force between first ripples foil 122a and the second ripples foil 122b, thereby very big improvement the friction damping of air bearing 12, the stability of bearing has been improved.

In other embodiments of the present invention, one end of the first bump foil 122a and one end of the top foil 123 are both connected to the mounting seat 121, and the other end of the first bump foil 122a and the other end of the top foil 123 extend in the same or opposite directions along the circumferential direction of the air bearing 12. It may be arranged that one end of the second bump foil 122b and one end of the top foil 123 are both connected to the mount 121, and the other end of the second bump foil 122b and the other end of the top foil 123 extend in the same or opposite directions in the circumferential direction of the air bearing 12. The utility model discloses in set up one of first ripples foil 122a and second ripples foil 122b to top foil 123 and set to the syntropy and extend through can, the stable deformation of the ripples foil of can being convenient for, improve the supporting role of ripples foil to top foil 123, when ripples foil and top foil 123 extend towards opposite direction, can further improve the frictional force between ripples foil and the top foil 123 to very big improvement air bearing 12's frictional damping, improved the stability of bearing.

In still other embodiments of the present invention, the top foil 123 is stacked with the first top foil 123 and the second top foil 123, one end of the first top foil 123 and one end of the second top foil 123 are both connected to the mounting seat 121, and the other end of the first top foil 123 and the other end of the second top foil 123 extend in the same or opposite directions along the circumferential direction of the air bearing 12. The utility model discloses in through the quantity that increases the ripples paper tinsel, the multiple friction area that has increased between piece and the piece, especially when first top paper tinsel 123 and second top paper tinsel 123 extend towards opposite direction, can further improve the frictional force between first top paper tinsel 123 and the second top paper tinsel 123 to very big improvement air bearing 12's friction damping, improved the stability of bearing.

The utility model discloses in can set up single layer top foil 123 or multilayer top foil 123, multilayer top foil 123 can range upon range of the arrangement, improves the rigidity of top foil 123, reduces the difference of top foil 123 deflection. The utility model discloses an increase the quantity of ripples paper tinsel, the multiple increase the friction area between piece and the piece to very big improvement air bearing 12's friction damping, improved the stability of bearing.

The utility model discloses in can adopt multilayer top foil 123 (for example double-deck), improve the rigidity of top foil 123, reduce the difference of top foil 123 at radial deflection (the deformation of tradition top foil 123 between two wave heights is big, and is outwards sunken easily), traditional single-layer top foil 123 scheme leads to the clearance grow between top foil 123 between two wave heights and rotor 11, influences wedge extrusion effect, leads to partial pressure less, and whole bearing capacity is low, the utility model provides a this problem has effectively been solved to multilayer top foil 123, thereby has improved the holistic bearing capacity of foil through reducing the difference of top foil 123 between crest and trough position deflection.

The air bearing 12 of the embodiment of the present invention may be an axial air bearing 12a or a radial air bearing 12b.

Taking the axial air bearing 12a as an example, the mounting seat 121, the bump foil, and the top foil 123 are stacked in the axial direction.

In addition, taking the radial air bearing 12b as an example, the mounting seat 121, the bump foil and the top foil 123 are sleeved from outside to inside along the radial direction, and during the use of the radial air bearing 12b, the rotating shaft may be sleeved inside the top foil 123, and during the rotation of the rotating shaft, the top foil 123 will be forced to displace toward the mounting seat 121, and an air film is formed between the rotating shaft and the top foil 123, and by using the supporting effect of the bump foil, the dynamic balance of the air film between the rotating shaft and the top foil 123 can be realized, so as to improve the stability of the rotating shaft during the rotation.

As shown in fig. 4, the present invention further provides a rotor assembly 10, and the rotor assembly 10 according to the embodiment of the present invention includes a rotor 11 and an air bearing 12 in the foregoing embodiment. By providing the air bearing 12, the stability of the rotor assembly 10 during operation can be improved, and the damping of the rotor 11 during rotation can be reduced.

The rotor assembly 10 may include a radial air bearing 12b, the radial air bearing 12b is sleeved on the periphery of the rotor 11, the radial air bearing 12b is the air bearing 12 according to the foregoing embodiment, and the mounting seat 121, the bump foil and the top foil 123 of the radial air bearing 12b are sequentially stacked from outside to inside along the radial direction of the rotor 11. During use, during rotation of the rotor assembly 10, the top foil 123 will be pushed towards the mounting seat 121 and a gas film will be formed on the surface of the top foil 123, which will cause the top foil 123 to expand outwardly and press against the wave foil, which will provide support for the top foil 123 so that the wave foil is at a suitable distance from the rotation axis to maintain the stability of the gas film between the top foil 123 and the rotation axis. Meanwhile, the stable rotation of the rotor 11 can be maintained, and the radial play of the rotor 11 is reduced.

In addition, the rotor assembly 10 may further include an axial air bearing 12a, the axial air bearing 12a is engaged with the rotor 11, the axial air bearing 12a is the air bearing 12 according to the previous embodiment, and the mounting seat 121, the bump foil and the top foil 123 of the axial air bearing 12a are sequentially stacked in the axial direction of the rotor 11. During use, during rotation of the rotor assembly 10, the top foil 123 will be pushed to move towards the mounting seat 121, and a gas film is formed on the surface of the top foil 123, the top foil 123 presses against the wave foil, and the wave foil provides a support for the top foil 123, so that the wave foil and the rotation shaft have a proper distance therebetween, so as to maintain the stability of the gas film between the top foil 123 and the rotation shaft.

The utility model also provides a compressor, this compressor has included aforementioned air supporting bearing 12.

The utility model also provides a compressor, this compressor includes aforementioned rotor assembly 10.

The utility model also provides a warm equipment of leading to, this warm equipment of leading to includes aforementioned air supporting bearing 12.

The utility model also provides a warm equipment of leading to, this warm equipment of leading to includes aforementioned rotor assembly 10.

The utility model also provides a warm equipment of leading to, this warm equipment of leading to includes aforementioned compressor.

The utility model provides an air bearing 12 and a rotor assembly 10, a compressor and a heating and ventilation device of the air bearing 12, wherein a gap is arranged between the wave crests of a first corrugated section 1221a of a first wave foil 122a and a second corrugated section 1221b of a second wave foil 122b of the air bearing 12; during light load, only one of the first wave foil 122a and the second wave foil 122b supports, at this time, the single-layer wave foil supports the wave foil to be easily deformed, the structural damping is high, energy brought by vibration of the rotor 11 can be well dissipated, and the stability of the rotor 11 is ensured; when heavy load or impact is suffered, the wave heights of the second corrugated section 1221b and the first corrugated section 1221a are reduced to be consistent, and the first corrugated section 1221a and the second corrugated section 1221b support together, so that large support rigidity can be realized, the wave foil is prevented from being collapsed and being irreversibly deformed, the critical rotating speed of the rotor 11 can be improved, and the stability and the impact resistance of the rotor 11 in high-speed operation can be ensured.

The embodiment of the utility model provides an air bearing 12 can be axial bearing or journal bearing to axial bearing is the example, and mount pad 121, ripples paper tinsel and top paper tinsel 123 are along the axial range upon range of arranging. Taking a radial bearing as an example, the mounting seat 121, the wave foil and the top foil 123 are sleeved from outside to inside along the radial direction, in the use process of the radial bearing, the rotating shaft can be sleeved inside the top foil 123, and in the rotating process of the rotating shaft, the top foil 123 is forced to displace towards the mounting seat 121, and a gas film is formed between the rotating shaft and the top foil 123, and by utilizing the supporting function of the wave foil, the dynamic balance of the gas film between the rotating shaft and the top foil 123 can be realized, so that the stability of the rotating shaft in the rotating process is improved. In addition, by offsetting the first corrugated section 1221a and the second corrugated section 1221b, the uniformity and stability of the support of the top foil 123 by the first corrugated foil 122a and the second corrugated foil 122b can be improved, so as to improve the load capacity of the air bearing 12.

In order to reduce the gas leakage of aerostatic bearing 12, and realize aerostatic bearing 12 and support the ascending rational overall arrangement of rigidity in the axial, the utility model provides a first bump paper tinsel 122a or second bump tinsel 122b establishes to follow the third direction segmentation design, as shown in fig. 3, divide into a plurality of sections with the foil along the third direction, wherein two sections on both sides are wide, middle a plurality of sections are short, and middle a plurality of sections evenly distributed, this structure has realized that the bump tinsel rigidity of middle a plurality of sections is little, both sides bump tinsel rigidity is big, realize the axial variable stiffness, when aerostatic bearing 12 is worked, the foil deflection of both sides is little for the deflection in the middle, can reduce the leakage of gas from both ends, thereby improve the gaseous membrane pressure in the middle of the foil, thereby improve the whole bearing capacity of radial foil piece gaseous dynamic pressure bearing.

The utility model discloses well top paper tinsel 123's both ends are overall structure, are not cut apart into the section, can guarantee the wholeness of ripples paper tinsel simultaneously.

The utility model provides an air bearing 12, this air bearing 12 have whole week formula structure, and the axial becomes rigidity, have high double wave paper tinsel such as non, two top paper tinsel 123 etc. this air bearing 12 includes that parts such as mount pad 121, first wave paper tinsel 122a, second wave paper tinsel 122b, multilayer top paper tinsel 123, locating pin 1203 constitute. The mounting block 121 is a finished bearing housing as shown in fig. 1, and has two positioning slots 1201 and positioning notches 1202 formed thereon for fixing the bump foil and the top foil 123.

The utility model provides a wave foil's material can be beryllium bronze, nickel base alloy, foil such as high strength stainless steel, with rectangular shape foil, carry out the line cutting, or laser cutting carries out the axial segmentation, fall into a plurality of sections in the middle of the foil during the line cutting, both sides foil is wide, a plurality of sections foil in the middle of narrow, and leave one section respectively at the both ends of foil and not cut, guarantee the wholeness of foil, and convenient installation in follow-up shaping rear, press the wave foil with the foil that the line cutting is good respectively, wherein one in first wave foil 122a and the second wave foil 122b can have arch wave structure, another can have the wave structure. The utility model discloses an air bearing 12 can be axial air bearing 12a, also can be radial air bearing 12b, to radial air bearing 12b, can be respectively with the wave paper tinsel batching ring of two rectangular shapes. The top foil 123 may be beryllium bronze, nickel-based alloy, high-strength stainless steel, or the like, wherein the inner wall of the top foil 123 is sprayed with a wear-resistant self-lubricating material, which may be molybdenum disulfide, polytetrafluoroethylene, PM, PS, or the like.

One end of the bump foil is fixed on the mounting seat 121 through the positioning groove 1201 and the positioning pin 1203, and one end of the top foil 123 is fixed on the mounting seat 121 through the matching of the positioning groove 1201 and the positioning pin 1203, wherein the plurality of bump foils and the mounting seat 121 can be fixed and extend in the same direction along the circumferential direction of the air bearing 12, the top foil 123 can include two stacked layers, one of the two top foils 123 is stacked on the plurality of bump foils, one end of the top foil is fixedly connected with the mounting seat 121, the other end of the top foil extends in the direction opposite to the extending direction of the bump foils, one end of the other top foil 123 is fixedly connected with the mounting seat 121, and the other end of the other top foil extends in the same direction as the extending direction of the bump foils.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (13)

1. The air bearing is characterized by comprising a mounting seat, a corrugated foil and a top foil which are sequentially stacked, wherein the corrugated foil comprises a first corrugated foil and a second corrugated foil which are stacked, the first corrugated foil comprises a first corrugated section, the second corrugated foil comprises a second corrugated section, and the first corrugated section and the second corrugated section are staggered in the circumferential direction of the air bearing.

2. The air bearing as recited in claim 1, wherein the first bump foil further comprises a first connecting section and the second bump foil further comprises a second connecting section, the first connecting section and the first bump section are staggered and connected along a circumferential direction of the air bearing, the second connecting section and the second bump section are staggered and connected along the circumferential direction of the air bearing, and peaks of the first bump section are stacked with the connecting section of the second bump foil.

3. The air bearing of claim 1, wherein at least two first bellows projections in the first bump foil differ in height; and/or

At least two second corrugation segment protrusions in the second corrugated foil have different heights.

4. The air bearing of claim 1, wherein the first and second bellows are different in height;

and/or the first and second wave segments are configured as circular arcs, the first and second wave segments having different radii.

5. The air bearing as recited in claim 1, wherein the first corrugated segment of the first bump foil and the second corrugated segment of the second bump foil are each raised toward the mount; or both the first corrugated segment of the first corrugated foil and the second corrugated segment of the second corrugated foil are convex towards the top foil.

6. The air bearing as recited in claim 1, wherein the second bump foil is closer to the top foil than the first bump foil in a stacking direction, the bump foils further comprising at least one third bump foil, the third bump foil being disposed between the first bump foil and the second bump foil, between the first bump foil and the mount or between the second bump foil and the top foil.

7. The air bearing as recited in claim 1, wherein the mounting block defines a positioning slot,

one end of each of the first wave foil and the second wave foil is inserted into one positioning groove; or

One end of the first bump foil and one end of the second bump foil are respectively inserted into different positioning grooves.

8. The air bearing as recited in claim 7, wherein a locating notch is formed in an inner sidewall of the locating groove, and a locating pin is formed in the mounting base and is inserted into the locating notch, the locating pin being configured to locate the bump foil.

9. The air bearing of claim 1, wherein one end of the first wave foil and one end of the second wave foil are both connected to the mounting seat, and the other end of the first wave foil and the other end of the second wave foil extend in the same or opposite directions in a circumferential direction of the air bearing;

and/or one end of the first wave foil and one end of the top foil are both connected with the mounting seat, and the other end of the first wave foil and the other end of the top foil extend towards the same direction or the opposite direction along the circumferential direction of the air bearing;

and/or one end of the second bump foil and one end of the top foil are both connected with the mounting seat, and the other end of the second bump foil and the other end of the top foil extend towards the same direction or the opposite direction along the circumferential direction of the air bearing;

and/or the top foil is laminated with a first top foil and a second top foil, one end of the first top foil and one end of the second top foil are both connected with the mounting seat, and the other end of the first top foil and the other end of the second top foil extend towards the same or opposite directions along the circumferential direction of the air bearing.

10. The air bearing as recited in any one of claims 1-9, wherein the air bearing is a radial air bearing or an axial air bearing.

11. A rotor assembly, the rotor assembly comprising a rotor, the rotor assembly further comprising:

the radial air bearing is sleeved on the periphery of the rotor, the radial air bearing is the air bearing according to any one of claims 1 to 9, and the mounting seat, the bump foil and the top foil of the radial air bearing are sequentially laminated from outside to inside along the radial direction of the rotor; and/or

An axial air bearing cooperating with the rotor, the axial air bearing being as claimed in any one of claims 1 to 9, the mount, the bump foil and the top foil of the axial air bearing being stacked sequentially in an axial direction of the rotor.

12. A compressor, characterized by comprising an air bearing according to any one of claims 1 to 10; or comprising a rotor assembly according to claim 11.

13. Heating and ventilation device, characterized in that it comprises an air bearing according to any one of claims 1 to 10; or comprising a rotor assembly according to claim 11; or comprising a compressor according to claim 12.

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