CN113090660B - Flow direction adjustable gas passive bearing - Google Patents

Abstract

The invention discloses a gas driven bearing with adjustable flow direction, which comprises a bearing, wherein an air passage and a restrictor are arranged in the bearing to form a passive adjustable device, the passive adjustable device comprises a front end and a tail end connected with the front end, the front end is accommodated in the air passage and is adhered to the inner wall of the air passage through sealing glue, and the tail end is inserted into an air outlet end of the restrictor. The invention has the beneficial effects that: the bearing has good stability and certain bearing capacity, and can ensure the high rigidity effect of the bearing in a wider gas film clearance area and the precision of the gas bearing; the number relation of the throttlers can be flexibly configured according to the requirements of performance and cost, the length of the passive adjusting device and the section shape of the tail end are changed simultaneously, the flow direction change in different forms is realized, and the bearing capacity range required by experiments is achieved.

Description

A gas passive bearing with adjustable flow direction

【Technical field】

The invention relates to the technical field of static pressure gas bearings, in particular to a gas passive bearing with adjustable flow direction.

【Background technique】

The micro-low gravity simulation platform of the static pressure gas bearing has an important application in the ground full physical simulation test of the spacecraft, and plays a decisive role in ensuring the on-orbit efficiency of the spacecraft. With the gradual increase of the volume of the spacecraft, especially the further increase of the scale of the space station, the realization of the full physical simulation of the spacecraft on the ground puts forward higher requirements for the load of the micro-low gravity simulation platform. Therefore, it is necessary to improve the bearing capacity of the bearing to meet the high load requirements of the micro-low gravity simulation platform.

At present, high air supply pressure is usually used to improve the high bearing capacity of the bearing. However, because the hydrostatic bearing is prone to vortex when the air pressure is high, the bearing is unstable, so the air supply pressure is usually limited to 6 atmospheres. This greatly restricts the bearing capacity improvement of the bearing.

Therefore, there is an urgent need for a new gas passive bearing with adjustable flow direction to solve the above technical problems.

[Content of the invention]

The invention discloses a gas passive bearing with adjustable flow direction. A passive flow direction adjustable device is installed inside the bearing, and the airflow direction of the bearing can be changed passively, so as to achieve the purpose of reducing vortex.

For achieving the above object, the technical scheme of the present invention is:

A gas passive bearing with adjustable flow direction, comprising a bearing, an air passage and a restrictor are arranged in the bearing to flow to a passively adjustable device, the passively adjustable flow direction device comprising a front end and an end connected with the front end, The front end is accommodated in the air passage and pasted on the inner wall of the air passage through a sealant, and the end is inserted into the air outlet end of the restrictor.

As a preferred improvement of the present invention: the cross-sectional shape of the airway can be a circle, a rectangle, a diamond, a semicircle or a triangle.

As a preferred improvement of the present invention, the restrictor may be a small hole restrictor or a toroidal restrictor.

As a preferred improvement of the present invention, the air outlet end of the small hole restrictor is provided with a pressure equalizing chamber.

As a preferred improvement of the present invention, the number of the restrictors may be one or more, and the arrangement is not limited.

As a preferred improvement of the present invention, the front end of the passive flow direction adjustable device is provided with a through hole penetrating the air passage and the restrictor, and the cross-sectional shape of the through hole can be circular, rectangular, Rhombus, semicircle or triangle.

As a preferred improvement of the present invention: the cross-sectional shape of the end of the passively adjustable flow direction device may be an inverted cone, a forward cone, a sphere or an arc.

As a preferred improvement of the present invention, the sealing method of the sealant is overall sealing or partial sealing.

As a preferred improvement of the present invention, the cross-sectional shape of the gas outlet end may be a circle, a rectangle, a rhombus, a semicircle or a triangle.

As a preferred improvement of the present invention, the cross-sectional shape of the pressure equalizing cavity may be a circle, a rectangle, a diamond, a semicircle or a triangle.

The beneficial effects of a gas passive bearing with adjustable flow direction provided by the present invention:

1. The bearing has good stability and certain bearing capacity, and at the same time can ensure that the bearing can achieve high stiffness effect in a wider air film gap area and ensure the accuracy of the gas bearing;

2. According to the requirements of performance and cost, the quantity relationship of the restrictor can be flexibly configured, and the length of the passive adjustment device and the cross-sectional shape of the end can be changed at the same time, so as to realize different forms of flow direction changes and achieve the bearing capacity range required by the experiment.

【Description of drawings】

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, under the premise of no creative work, other drawings can also be obtained from these drawings, wherein:

1 is a schematic diagram of the overall structure of a circular bearing in Embodiment 1 of the present invention;

2 is a cross-sectional view of a circular bearing in Embodiment 1 of the present invention;

3 is a cross-sectional view of a circular bearing in Embodiment 2 of the present invention;

FIG. 4 is a top view of the passive flow direction adjustable device of the bearing in Embodiment 3 of the present invention;

Fig. 5 is the top view of the passive flow direction adjustable device of the bearing according to the fourth embodiment of the present invention;

6 is a top view of the sealant of the bearing in Embodiment 7 of the present invention;

7 is a top view of the sealant of the bearing in Embodiment 8 of the present invention;

8 is a top view of the sealant of the bearing in Embodiment 1 of the present invention;

FIG. 9 is a front view of the passive flow direction adjustable device of the bearing according to the ninth embodiment of the present invention;

FIG. 10 is a front view of the passive adjustable device for the flow direction of the bearing in Embodiment 10 of the present invention;

FIG. 11 is a front view of the passive flow direction adjustable device of the bearing in Embodiment 11 of the present invention;

FIG. 12 is a front view of the passive flow direction adjustable device of the bearing in Embodiment 11 of the present invention;

FIG. 13 is a schematic diagram of the gas flow inside the bearing in Embodiment 12 of the present invention;

14 is a schematic diagram of the gas flow inside the bearing in Embodiment 5 of the present invention;

FIG. 15 is a top view of a circular bearing according to Embodiment 14 of the present invention;

Fig. 16 is a top view of a square bearing according to the thirteenth embodiment of the present invention;

17 is a schematic diagram of the ideal gas flow in Embodiment 15 of the present invention;

FIG. 18 is a schematic diagram of vortex generation in Example 16 of the present invention.

【Detailed ways】

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relationship between various components under a certain posture (as shown in the accompanying drawings). The relative positional relationship, the movement situation, etc., if the specific posture changes, the directional indication also changes accordingly.

In addition, descriptions such as "first", "second", etc. in the present invention are only for descriptive purposes, and should not be construed as indicating or implying their relative importance or implicitly indicating the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

In the present invention, unless otherwise expressly specified and limited, the terms "connected", "fixed" and the like should be understood in a broad sense, for example, "fixed" may be a fixed connection, a detachable connection, or an integrated; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be an internal communication between two elements or an interaction relationship between the two elements, unless otherwise explicitly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

Example 1

Referring to Figures 1 and 2, the present invention provides a passive gas bearing with adjustable flow direction, comprising a bearing (not numbered), wherein an air passage 1 and a restrictor (not numbered) are arranged in the bearing to allow the flow direction to be passively adjustable Adjustment device 6, the flow direction passively adjustable device 6 includes a front end 61 and an end 62 connected to the front end 61, the front end 61 is accommodated in the airway 1 and pasted on the airway 1 through a sealant 7 On the inner wall of the throttle body, the end 62 is inserted into the outlet end 4 of the restrictor. The cross-sectional shape and size of each position in the length direction of the fuselage can be inconsistent. Through different types of the passive flow direction adjustable device 6, the change of the gas flow direction is realized, thereby reducing the vortex, thereby improving the stability of the bearing and ensuring that the bearing achieves a high stiffness effect in a wider air film gap area, ensuring that the bearing accuracy.

The cross-sectional shape of the airway 1 may be a circle, a rectangle, a rhombus, a semicircle or a triangle, and the cross-sectional shape and size of each position along the length direction of the airway 1 may be inconsistent.

The restrictor may be one or more, and the arrangement is not limited, and it may be a small hole restrictor 2 or a toroidal restrictor 3 . If it is the small hole restrictor 2, the air outlet end 4 of the small hole restrictor 2 is provided with a pressure equalizing chamber 5; if it is the toroidal restrictor 3, the toroidal restrictor The outlet end 4 of 3 has no equalizing chamber. Specifically, the cross-sectional shape of the pressure equalizing chamber 5 may be a circle, a rectangle, a rhombus, a semicircle or a triangle, and the cross-sectional shapes and dimensions of each position along the length direction of the pressure equalizing chamber 5 may be inconsistent.

The front end 61 of the passively adjustable flow direction device 6 is provided with a through hole 63 penetrating the air passage and the restrictor, and the cross-sectional shape of the through hole 63 can be a circle, a rectangle, a diamond, or a semicircle. or triangles. The cross-sectional shape of the end 62 of the flow direction passively adjustable device 6 may be an inverted cone, a forward cone, a sphere or an arc.

The sealing method of the sealant 7 is overall sealing or partial sealing, and the partial sealing method of the sealant 7 may be four-part sealing or six-part sealing, but they all need to be arranged in equal parts.

Example 2

Referring specifically to FIG. 3 , the basic structure of the second embodiment is the same as that of the first embodiment. The difference is that the restrictor in the second embodiment adopts a toroidal restrictor, as shown in FIG. 3 .

Example 3

Referring specifically to FIG. 4 , the basic structure of the third embodiment is the same as that of the first embodiment, the difference is that the flow direction passive adjustable device in the third embodiment has a positive tapered end, and the upper end opens six A passively adjustable device with a circular hole.

Example 4

Referring specifically to FIG. 5 , the basic structure of the fourth embodiment is the same as that of the second embodiment. The difference is that the flow direction passive adjustable device in the fourth embodiment has a positive tapered end, and the upper end is not open. A passively adjustable device for the flow direction of an opening.

Example 5

The basic structure of this embodiment 5 is the same as that of the first embodiment, the difference is that the flow direction passive adjustable device in this embodiment 5 adopts the forward tapered end, the front opening type flow direction passive adjustable device, and the sealing of the sealant. The overall sealing method is selected, and the gas enters the gas outlet through the upper surface of the passive adjustable device to realize the circulation of the gas. The inlet method is shown in Figure 14.

Example 6

The basic structure of this embodiment 6 is the same as that of the first embodiment. The difference is that the passive flow direction adjustable device in this embodiment 6 adopts a forward tapered end, and the front end does not have a hole type. The flow direction passive adjustable device is carried out as follows shown in Figure 13. In addition, the passive flow direction adjustable device in this embodiment 6 adopts a positive tapered end, and the flow direction passive adjustable device of the type with no holes in the front end is used.

Example 7

The basic structure of the seventh embodiment is the same as that of the first embodiment, the difference is that the sealing method of the sealant adopts the quarter sealing, as shown in FIG. 6 . In addition, the basic structure of the seventh embodiment is the same as that of the second embodiment, the difference is that the sealing method of the sealant adopts the quarter sealing.

Example 8

The basic structure of the present embodiment 8 is the same as that of the embodiment 1, and the difference is that the sealing method of the sealant adopts six equal sealing, as shown in FIG. 7 . In addition, the basic structure of Embodiment 8 is the same as that of Embodiment 2, the difference is that the sealing method of the sealant adopts six equal sealing.

Example 9

The basic structure of Embodiment 9 is the same as that of Embodiment 1. The difference is that the passive flow direction adjustable device adopts an inverted tapered end, and the flow direction passive adjustable device of the type with no holes on the upper end is used, as shown in FIG. 9 . In addition, the basic structure of Embodiment 9 is the same as that of Embodiment 2, the difference is that the passive flow direction adjustable device adopts an inverted tapered end, and the flow direction passive adjustable device of the type without openings at the front end is used.

Example 10

The basic structure of Embodiment 10 is the same as that of Embodiment 1. The passive flow direction adjustable device adopts an arc shape, and the flow direction passive adjustable device of the type with no holes at the front end is used, as shown in FIG. 10 . In addition, the basic structure of the embodiment 10 is the same as that of the embodiment 2, and the passive flow direction adjustable device adopts an arc shape, and the front end does not have a hole type.

Example 11

The basic structure of this embodiment 11 is the same as that of embodiment 1. The passive flow direction adjustable device adopts another arc shape, and the flow direction passive adjustable device of the type with no holes in the front end is used, as shown in FIG. 11 . In addition, the basic structure of Embodiment 11 and Embodiment 2 is the same as that of Embodiment 2. The passive flow direction adjustable device adopts another arc shape, and the flow direction passive adjustable device of the type with no holes in the front end is used, as shown in FIG. 12 .

Example 12

The basic structure of this embodiment 12 is the same as that of embodiment 1. The upper end of the passive adjustable device does not open holes for the gas flow in the bearing, and the sealing method of the sealant selects partial sealing. shown in Figure 13.

Example 13

The basic structure of Embodiment 13 is the same as that of Embodiment 1. The difference is that the shape of the bearing is square, and eight annular restrictors are arranged on it, as shown in FIG. 16 . In addition, the basic structure of Embodiment 13 is the same as that of Embodiment 2, the difference is that the shape of the bearing is square, and eight annular restrictors are arranged on it.

Example 14

The basic structure of Embodiment 11 is the same as that of Embodiment 1. The difference is that the shape of the bearing is circular, and eight annular restrictors are arranged on it, as shown in FIG. 15 . In addition, the basic structure of this embodiment is the same as that of the second embodiment, the difference is that the shape of the bearing is circular, and eight annular restrictors are arranged on it.

Example 15

This embodiment 15 is the ideal gas flow direction of the present invention. The ideal gas flow direction can improve the bearing stability and ensure that the bearing achieves high stiffness in a wider gas film gap area, ensuring the accuracy of the gas bearing, as shown in Figure 17.

Example 16

The present embodiment 16 is a schematic diagram of the vortex generation of the present invention. The vortex generation will reduce the bearing capacity of the bearing and reduce the stability of the bearing, as shown in FIG. 18 .

The beneficial effects of a gas passive bearing with adjustable flow direction provided by the present invention:

1. The bearing has good stability and certain bearing capacity, and at the same time can ensure that the bearing can achieve high stiffness effect in a wider air film gap area and ensure the accuracy of the gas bearing;

2. According to the requirements of performance and cost, the quantity relationship of the restrictor can be flexibly configured, and the length of the passive adjustment device and the cross-sectional shape of the end can be changed at the same time, so as to realize different forms of flow direction changes and achieve the bearing capacity range required by the experiment.

Although the embodiment of the present invention has been disclosed as above, it is not limited to the application listed in the description and the embodiment, and it can be applied to various fields suitable for the present invention. For those skilled in the art, it can be easily Additional modifications are implemented, therefore, the invention is not limited to the specific details and illustrations shown and described herein without departing from the general concept defined by the appended claims and the scope of equivalents.

Claims (9)

1. A gas passive bearing with adjustable flow direction, characterized in that it comprises a bearing, and an air passage (1), a restrictor and a passive flow direction adjustable device (6) are arranged in the bearing, and the air passage (1) is provided. ) communicated with the restrictor, the flow direction passively adjustable device (6) comprises a front end and an end connected with the front end, the front end is located at the connection of the air passage (1) and the restrictor , the front end is accommodated in the air passage (1) and the side of the front end close to the restrictor is pasted on the inner wall of the air passage (1) through a sealant (7), and the end is inserted into the air passage (1). At the gas outlet end (4) of the restrictor, the sealing method of the sealant (7) is partial sealing, and the gas enters the gas outlet end (4) through the gap of the sealant (7) to realize gas circulation. 2 . The gas passive bearing with adjustable flow direction according to claim 1 , wherein the cross-sectional shape of the air passage ( 1 ) is a circle, a rectangle, a diamond, a semicircle or a triangle. 3 . 3 . The gas passive bearing with adjustable flow direction according to claim 1 , wherein the restrictor is a small hole restrictor ( 2 ) or a toroidal restrictor ( 3 ). 4 . 4 . The gas passive bearing with adjustable flow direction according to claim 3 , wherein the gas outlet end ( 4 ) of the small hole restrictor ( 2 ) is provided with a pressure equalizing chamber ( 5 ). 5 . 5 . The gas passive bearing with adjustable flow direction according to claim 1 , wherein the number of the restrictors is one or more, and the arrangement is not limited. 6 . 6. The gas passive bearing with adjustable flow direction according to claim 1, characterized in that: the front end of the passive flow direction adjustable device (6) is provided with a through hole penetrating the air passage and the restrictor, And the cross-sectional shape of the through hole is a circle, a rectangle, a diamond, a semicircle or a triangle. 7 . The gas passive bearing with adjustable flow direction according to claim 1 , wherein the cross-sectional shape of the end of the passive flow direction adjustable device ( 6 ) is an inverted cone, a forward cone, a sphere or an arc. 8 . 8 . The gas passive bearing with adjustable flow direction according to claim 1 , wherein the cross-sectional shape of the gas outlet ( 4 ) is a circle, a rectangle, a diamond, a semicircle or a triangle. 9 . 9 . The gas passive bearing with adjustable flow direction according to claim 4 , wherein the cross-sectional shape of the pressure equalizing chamber ( 5 ) is a circle, a rectangle, a diamond, a semicircle or a triangle. 10 .

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