CN214742782U

CN214742782U - Dustproof air suspension bearing

Info

Publication number: CN214742782U
Application number: CN202120452304.7U
Authority: CN
Inventors: 宋志廷; 吴本伟; 郑述华; 朱宝香
Original assignee: Shandong Shuoyuan Power Technology Co ltd
Current assignee: Shandong Shuoyuan Power Technology Co ltd
Priority date: 2021-03-02
Filing date: 2021-03-02
Publication date: 2021-11-16
Anticipated expiration: 2031-03-02

Abstract

The application discloses dustproof air suspension bearing includes: the bearing body is of a cylindrical structure with two open ends, and the outer wall of the bearing body is provided with an air inlet joint communicated with the inside of the bearing body; the connectors are in a pair and annular structures, correspond to the two ends of the bearing body one by one and are coaxially and fixedly connected to the two ends of the bearing body, and the diameter of the inner wall of the annular structure of each connector is smaller than the inner diameter of the bearing body; the rotating shaft is rotatably arranged in the bearing body in a penetrating way, a gap is reserved between the outer wall of the rotating shaft and the inner wall of the bearing body, and two ends of the rotating shaft respectively penetrate through the connectors fixedly connected with two ends of the bearing body; this scheme still includes: dustproof mechanism, be a pair of and with the connector one-to-one to fixed connection is in the connector is kept away from the tip of bearing body, this scheme is implemented reliably, with low costs and is maintained the facility.

Description

Dustproof air suspension bearing

Technical Field

The application relates to the field of gas bearing devices, in particular to a dustproof air suspension bearing.

Background

Air suspension bearings (also called air bearings) refer to sliding bearings that use gas (usually air, but other gases are possible) as a lubricant. Air has lower viscosity than oil, is resistant to high temperature, and is pollution-free, so that it can be used in high-speed machine, instrument and radioactive equipment, but its load-bearing capacity is lower than that of oil.

Because two ends of the bearing body of the air suspension bearing need to penetrate out of the rotating shaft, dust in the air can be attached to the rotating shaft under the influence of static electricity under normal conditions, in addition, the rotating shaft of the air suspension bearing can descend relative to the bearing body when the rotating shaft starts to work and stops working, and at the moment, friction with the inside of the bearing body to a certain degree usually occurs, the friction can generate a certain amount of tiny metal debris, the air flow formed on the end part of the bearing body by the air output outwards from the two ends in the bearing body of the air suspension bearing is generally in a laminar state, so that the dust attached to the inner wall of the rotating shaft body or the outer wall of the rotating shaft is difficult to be blown away quickly to a certain extent, however, since the accumulation of dust may affect the maintenance of a good operating state of the aero-levitation bearing, it is a practical research topic to improve the dust-proof capability of the aero-levitation bearing.

Disclosure of Invention

To the situation of the prior art, the utility model aims to provide an implement reliable, with low costs and maintain convenient dustproof air suspension bearing.

In order to realize the technical purpose, the utility model adopts the technical scheme that:

a dust-protected aero-suspension bearing comprising:

the bearing body is of a cylindrical structure with two open ends, and the outer wall of the bearing body is provided with an air inlet joint communicated with the inside of the bearing body;

the connectors are in a pair and annular structures, correspond to the two ends of the bearing body one by one and are coaxially and fixedly connected to the two ends of the bearing body, and the diameter of the inner wall of the annular structure of each connector is smaller than the inner diameter of the bearing body;

the rotating shaft is rotatably arranged in the bearing body in a penetrating way, a gap is reserved between the outer wall of the rotating shaft and the inner wall of the bearing body, and two ends of the rotating shaft respectively penetrate through the connectors fixedly connected with two ends of the bearing body;

this scheme still includes:

dustproof mechanism, be a pair of and with the connector one-to-one, and fixed connection is in the connector is kept away from the tip of bearing body, dustproof mechanism includes:

the connecting sleeve is of a tubular structure, and one end of the connecting sleeve is coaxially fixed with the end part of the connecting head, which is far away from the bearing body;

the inner diameter of the connecting sleeve is larger than that of the connector, and a necking part which is the same as the inner diameter of the connector is arranged on the inner side of the end part of the connecting sleeve, which is close to the connector;

the inner wall of the connecting sleeve is provided with a plurality of spiral diversion ribs at intervals, and the height of the projection of the diversion ribs along the radial center direction of the connecting sleeve is not higher than the inner wall of the necking part.

As a possible implementation manner, further, the length of the connecting sleeve is 3-10 cm, and one end of the flow guide rib spirally extends from one end of the inner wall of the connecting sleeve, which is close to the necking part, to the end of the other end of the flow guide rib.

As a better implementation choice, preferably, the spiral number of turns of the flow guide ribs is 0.06-0.1.

As a better implementation choice, preferably, the number of the flow guide ribs is 6-12.

As a preferred implementation option, preferably, the connecting sleeve and the outer wall of the end portion fixedly connected with the bearing body are distributed with at least more than four connecting pieces at intervals in an annular array, the end portion of the bearing body is correspondingly provided with mounting holes corresponding to the connecting pieces one to one, the connecting pieces are locked and fixed with the mounting holes through connecting bolts, and the connecting sleeve is fixed on the end portion of the bearing body.

As a preferred implementation option, preferably, the bearing body includes:

the first bearing sleeve is of a tubular structure, and a plurality of vent holes penetrating through the inner wall and the outer wall of the first bearing sleeve are uniformly distributed on the inner wall of the first bearing sleeve;

the second bearing sleeve is of a tubular structure and coaxially sleeved outside the first bearing sleeve, two ends of the second bearing sleeve are respectively flush with two ends of the first bearing sleeve, a gap is formed between the outer wall of the second bearing sleeve and the inner wall of the first bearing sleeve, and the air inlet joint is arranged on the outer wall of the second bearing sleeve and communicated to the inside of the second bearing sleeve;

the connector respectively with the first bearing housing with the tip welded fastening of second bearing housing.

As a preferred implementation option, the profile of the vent hole is preferably a frustum-shaped structure, and a large opening end of the frustum-shaped structure of the vent hole faces the inner wall of the second bearing sleeve.

As a better implementation choice, preferably, the included angle alpha formed by the side surface of the frustum-shaped structure of the vent hole and the plane where the long bottom edge of the frustum-shaped structure is located is 80-85 degrees.

As a possible embodiment, the cross-sectional profile of the flow-guiding ribs is triangular.

As a better implementation choice, preferably, the height difference between the protruding height of the flow guide rib along the radial center direction of the connecting sleeve and the inner wall of the necking part is 0.2-1.2 mm.

Adopt foretell technical scheme, compared with the prior art, the utility model, its beneficial effect who has is: this scheme ingenious is through coaxial setting dustproof mechanism on the connector of the bearing body, the air that utilizes dustproof mechanism's water conservancy diversion rib to blow out in the bearing body carries out the spiral water conservancy diversion, the air current that its one side utilized the production of spiral water conservancy diversion blows outward to the dust outside the bearing body, and simultaneously, the spiral air current that forms has constituted a spiral air curtain, avoid attaching to the dust in the pivot, on the other hand, can make the metal cuttings that pivot and the internal friction of bearing produced blow outward, make it receive the action of gravity and throw away, the air current velocity of flow of having avoided traditional advection formula is lower at the air current velocity of being close to pivot outer wall direction, can't blow away the metal cuttings who is in the pivot, this scheme is implemented reliably, dustproof effect is good, and it is convenient to maintain.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic three-dimensional view of a schematic implementation structure of the scheme of the present invention;

FIG. 2 is a schematic side view of a schematic structure according to an embodiment of the present invention;

FIG. 3 is a schematic view of the front view of the schematic structure according to the embodiment of the present invention;

fig. 4 is a schematic cross-sectional structure view corresponding to the view shown in fig. 3 according to the embodiment of the present invention;

FIG. 5 is an enlarged view of a portion of the structure at A in FIG. 4;

fig. 6 is a schematic partial sectional view of a three-dimensional view angle of a simple implementation structure according to the present invention, wherein the main shaft is sectioned.

Icon: 1-a bearing body; 11-an air inlet connection; 12-a first bearing sleeve; 121-a vent hole; 13-a second bearing sleeve; 2-a connector; 3-a rotating shaft; 4-a dust-proof mechanism; 41-connecting sleeves; 411-a throat; 42-flow guiding ribs; 43-connecting piece; 44-connecting bolts.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present application, it is to be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, refer to the orientation or positional relationship as shown in the drawings, or as conventionally placed in use of the product of the application, or as conventionally understood by those skilled in the art, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be considered as limiting the present application.

Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

The technical solution in the present application will be described below with reference to the accompanying drawings.

As shown in one of fig. 1 to 6, the present invention provides a dustproof air suspension bearing, comprising:

the bearing body 1 is a cylindrical structure with two open ends, and an air inlet joint 11 communicated with the inside of the bearing body is arranged on the outer wall of the bearing body;

the connectors 2 are in a pair and annular structures, correspond to the two ends of the bearing body 1 one by one and are coaxially and fixedly connected to the two ends of the bearing body 1, and the diameter of the inner wall of the annular structure of the connectors 2 is smaller than the inner diameter of the bearing body 1;

the rotating shaft 3 is rotatably arranged in the bearing body 1 in a penetrating way, a gap is reserved between the outer wall of the rotating shaft 3 and the inner wall of the bearing body 1, and two ends of the rotating shaft 3 respectively penetrate through the connectors 2 fixedly connected with two ends of the bearing body 1;

this scheme still includes:

dustproof mechanism 4, be a pair of and with 2 one-to-ones of connector, and fixed connection be in connector 2 is kept away from the tip of bearing body 1, dustproof mechanism 4 includes:

the connecting sleeve 41 is of a tubular structure, and one end of the connecting sleeve is coaxially fixed with the end part of the connecting head 2 far away from the bearing body 1;

the inner diameter of the connecting sleeve 41 is larger than that of the connector 2, and a necking part 411 with the same inner diameter as that of the connector 2 is arranged on the inner side of the end part of the connecting sleeve 41 close to the connector 2;

a plurality of spiral diversion ribs 42 are arranged on the inner wall of the connecting sleeve 41 at intervals, and the height of the protrusion of the diversion ribs 42 along the radial center direction of the connecting sleeve 41 is not higher than the inner wall of the necking part 411.

Because the gas input into the bearing body 1 by the gas inlet joint 11 can be output from the gap between the connectors 2 and the rotating shaft 3 at the two ends of the bearing body 1, and the dustproof mechanism 4 mainly has the advantages that the spiral gas flow is formed by guiding the output gas through the flow guide ribs 42, the phenomenon that metal scraps caused by friction in the rotating shaft body 1 cannot be quickly blown out due to the fact that external dust is accumulated outside the connectors 2 and the output gas flow forms laminar flow is avoided, therefore, the length of the connecting sleeve 41 is 3-10 cm, one end of each flow guide rib 42 spirally extends to the tail end of the other end of the flow guide rib from one end, close to the necking part 411, of the inner wall of the connecting sleeve 41, and as a preferable structure, the number of spiral turns of the flow guide ribs 42 is 0.06-0.1 turn; meanwhile, the number of the flow guide ribs 42 is 6-12.

For the convenience of assembly, the connecting sleeves 41 are arranged on the outer wall of the end portion fixedly connected with the bearing body 1 in an annular array at intervals, at least four connecting pieces 43 are arranged on the outer wall of the end portion fixedly connected with the bearing body 1 at intervals, mounting holes corresponding to the connecting pieces 43 are correspondingly formed in the end portion of the bearing body 1, the connecting pieces 43 are locked and fixed through the mounting holes through connecting bolts 44, and the connecting sleeves 41 are fixed on the end portion of the bearing body 1.

In addition, in order to improve the uniformity of gas input into the bearing body 1, the bearing body 1 comprises:

the first bearing sleeve 12 is of a tubular structure, and a plurality of vent holes 121 penetrating through the inner wall and the outer wall of the first bearing sleeve are uniformly distributed on the inner wall of the first bearing sleeve;

the second bearing sleeve 13 is of a tubular structure and coaxially sleeved outside the first bearing sleeve 12, two ends of the second bearing sleeve 13 are respectively flush with two ends of the first bearing sleeve 12, a gap is formed between the outer wall of the second bearing sleeve 13 and the inner wall of the first bearing sleeve 12, and the air inlet joint 11 is arranged on the outer wall of the second bearing sleeve 13 and communicated to the inside of the second bearing sleeve;

the connector 2 is respectively welded and fixed with the end parts of the first bearing sleeve 12 and the second bearing sleeve 13.

In this embodiment, as a preferable configuration, the profile of the vent hole 121 is a frustum-shaped structure, and a large opening end of the frustum-shaped structure of the vent hole 121 faces the inner wall of the second bearing housing 13; the included angle alpha formed by the side face of the frustum-shaped structure of the vent hole 121 and the plane where the long bottom edge of the frustum-shaped structure is located is 80-85 degrees.

Because the structural profile of the flow guiding ribs 42 influences to a certain extent whether the gas output from the connector 2 can be quickly guided, the cross-sectional profile of the flow guiding ribs 42 is triangular, and the trapezoidal and semicircular schemes can guide the gas, but the space at the top of the ribs occupies a large space, so that the air flow is difficult to split, and the flow guiding ribs are preferably triangular.

In order to avoid the diversion ribs 42 from generating rotation interference on the rotating shaft 3 and improve the diversion effectiveness of the airflow as much as possible, the height difference between the protruding height of the diversion ribs 42 along the radial center direction of the connecting sleeve 41 and the inner wall of the necking part 411 is 0.2-1.2 mm.

This scheme during operation, through the air inlet joint 11 toward bearing body 1 internal input gas, it is coaxial with bearing body 1 to make pivot 3 be lifted to preset the position, then 3 rotatory works in the pivot, the air of air inlet joint 11 input can be arranged outward through the connector, and the air of the clearance output between connector 2 and the pivot 3, can guide because the water conservancy diversion rib 42 of dustproof mechanism 4, and produce spiral air current, wherein spiral air current has formed spiral gas curtain, avoid the dust to adhere to in 3 surfaces of pivot, the dustproof performance of device has been improved.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A dust-protected aero-suspension bearing comprising:

the bearing body (1) is of a cylindrical structure with two open ends, and an air inlet joint (11) communicated with the inside of the bearing body is arranged on the outer wall of the bearing body;

the connectors (2) are in a pair and are in annular structures, correspond to the two ends of the bearing body (1) one by one and are coaxially and fixedly connected to the two ends of the bearing body (1), and the diameter of the inner wall of the annular structure of the connectors (2) is smaller than the inner diameter of the bearing body (1);

the rotating shaft (3) is rotatably arranged in the bearing body (1) in a penetrating manner, a gap is reserved between the outer wall of the rotating shaft (3) and the inner wall of the bearing body (1), and two ends of the rotating shaft (3) respectively penetrate through the connectors (2) fixedly connected with two ends of the bearing body (1);

the method is characterized in that: it still includes:

dustproof mechanism (4), be a pair of and with connector (2) one-to-one, and fixed connection is in connector (2) are kept away from the tip of bearing body (1), dustproof mechanism (4) include:

the connecting sleeve (41) is of a tubular structure, and one end of the connecting sleeve is coaxially fixed with the end part of the connecting head (2) far away from the bearing body (1);

the inner diameter of the connecting sleeve (41) is larger than that of the connector (2), and a necking part (411) with the same inner diameter as that of the connector (2) is arranged on the inner side of the end part of the connecting sleeve (41) close to the connector (2);

the inner wall of the connecting sleeve (41) is provided with a plurality of spiral diversion ribs (42) at intervals, and the height of the diversion ribs (42) along the radial center direction of the connecting sleeve (41) is not higher than the inner wall of the necking part (411).

2. The anti-dust aero-levitation bearing of claim 1, wherein: the length of adapter sleeve (41) is 3 ~ 10cm, the one end spiral that one end of water conservancy diversion rib (42) is close throat portion (411) by adapter sleeve (41) inner wall extends to its other end.

3. The anti-dust aero-levitation bearing of claim 2, wherein: the spiral turns of the flow guide ribs (42) are 0.06-0.1 turns.

4. A dustproof aero-suspension bearing according to claim 2 or 3, wherein: the number of the flow guide ribs (42) is 6-12.

5. The anti-dust aero-suspension bearing of claim 4 wherein: adapter sleeve (41) with be annular array interval cloth on bearing body (1) fixed connection's the tip outer wall and be at least more than four connection pieces (43), correspond on the tip of bearing body (1) be equipped with the mounting hole of connection piece (43) one-to-one, just connection piece (43) through connecting bolt (44) with the mounting hole locking is fixed, will adapter sleeve (41) are fixed on the tip of bearing body (1).

6. The anti-dust aero-suspension bearing of claim 4 wherein: the bearing body (1) comprises:

the first bearing sleeve (12) is of a tubular structure, and a plurality of vent holes (121) penetrating through the inner wall and the outer wall of the first bearing sleeve are uniformly distributed on the inner wall of the first bearing sleeve;

the second bearing sleeve (13) is of a tubular structure and coaxially sleeved on the outer side of the first bearing sleeve (12), two ends of the second bearing sleeve (13) are respectively parallel to two ends of the first bearing sleeve (12), a gap is formed between the outer wall of the second bearing sleeve (13) and the inner wall of the first bearing sleeve (12), and the air inlet joint (11) is arranged on the outer wall of the second bearing sleeve (13) and communicated to the interior of the second bearing sleeve;

the connector (2) is respectively welded and fixed with the end parts of the first bearing sleeve (12) and the second bearing sleeve (13).

7. The anti-dust aero-suspension bearing of claim 6 wherein: the profile of the vent hole (121) is a frustum-shaped structure, and the large opening end of the frustum-shaped structure of the vent hole (121) faces the inner wall of the second bearing sleeve (13).

8. The anti-dust aero-levitation bearing of claim 7, wherein: the included angle alpha formed by the side face of the frustum-shaped structure of the vent hole (121) and the plane where the long bottom edge of the frustum-shaped structure is located is 80-85 degrees.

9. The anti-dust aero-levitation bearing of claim 1, wherein: the cross-sectional profile of the flow guide ribs (42) is triangular.

10. The anti-dust aero-levitation bearing of claim 9, wherein: the height difference between the protruding height of the diversion rib (42) along the radial center direction of the connecting sleeve (41) and the inner wall of the necking part (411) is 0.2-1.2 mm.