CN211175011U - A hydrostatic thrust air-floating axial bearing with hexagonal star pressure equalizing groove - Google Patents

Abstract

The utility model discloses a static pressure thrust air-floating axial bearing with a hexagonal star pressure equalizing groove, which belongs to the technical field of air-floating bearings. There is a certain gap between the upper and lower thrust plates. The gap is an air film layer. There are several air supply holes along the circumferential direction on the upper and lower thrust plates. The flow section and the hexagonal star pressure equalizing groove section, and the end of the hexagonal star pressure equalizing groove section is close to the rotor, the height of the hexagonal star pressure equalizing groove section is 5um-100um, and the hexagonal star shape and each angle of the hexagonal star is 60° , and each side has the same length. The hexagonal star pressure equalizing groove of the utility model has a low height, and the thickness of the entire air film layer is uniform, so the air bearing capacity, rigidity and stability of the air bearing are good, and the structure is simple and the manufacturing cost is low.

Description

A hydrostatic thrust air-floating axial bearing with hexagonal star pressure equalizing groove

technical field

The utility model relates to the technical field of air flotation bearings, in particular to a static pressure thrust air flotation axial bearing with a hexagonal star pressure equalizing groove.

Background technique

Air bearing has the advantages of high precision, no pollution, long life, stable operation, low friction and no heat generation, and is widely used in all walks of life. However, factors such as low bearing capacity and poor stiffness limit its scope of use. At present, there are many researches on improving its bearing capacity and stiffness. For example, in the first issue of Electromechanical Engineering in 2019, Li Junjun, China Academy of Water Conservancy and Hydropower, published a paper entitled "Evaluation of the dynamic performance of the plane static pressure air bearing by the cross pressure equalizing groove." Influence Study", which studies the effect of air film thickness on the dynamic stiffness and damping coefficient of the cross pressure equalizing slot in the frequency domain. In the present invention, a series of researches are carried out around the pressure equalizing groove, and the bearing capacity and rigidity of the air bearing are improved by optimizing the shape, arrangement and other parameters of the pressure equalizing groove.

Utility model content

In view of the above technical problems, the purpose of this utility model is to provide a static pressure thrust air-floating axial bearing with a hexagonal star pressure equalizing groove, so that the gas enters the air film gap through the hexagonal star pressure equalizing groove, and the support state is stable, Obtain high bearing capacity and stiffness.

The utility model adopts the following technical solutions as follows:

A static pressure thrust air-floating axial bearing with a hexagonal star pressure equalizing groove, including an upper thrust plate, a rotor and a lower thrust plate, all three are circular, and the upper thrust plate and the lower thrust plate are respectively Located on both sides of the rotor, there is a certain gap between the rotor and the upper thrust plate and the lower thrust plate. This gap is an air film layer. There are several air supply holes along the circumferential direction on the upper thrust plate and the lower thrust plate. The air supply hole includes an air supply connection section, a throttling section and a hexagonal star pressure equalizing groove section that are connected in sequence, and the end of the hexagonal star pressure equalizing groove section is facing the rotor, and the height of the hexagonal star pressure equalizing groove section is 5um ~ 100um , the hexagonal star pressure equalizing groove section is a hexagonal star and each corner of the hexagonal star is 60°, and the length of each side is equal, so that the airflow can be evenly distributed, and the thickness difference of the entire gas film layer is small, so the stability powerful.

Preferably, the centerlines of the gas supply connection section, the throttle section and the end of the hexagonal star pressure equalizing groove are located on the same axis, that is, the three are arranged concentrically.

Preferably, the upper thrust plate and the lower thrust plate are provided with 1-3 rows of air supply holes around the center of the circle, and each row of air supply holes is evenly distributed around the circumference.

The beneficial effects of the present utility model are:

The hexagonal star pressure equalizing groove of the utility model has a low height, and the six corners are all equilateral triangle structures. The thickness of the entire air film layer is uniform. Low.

Description of drawings

Fig. 1 is the overall schematic diagram of the utility model;

Fig. 2 is a schematic diagram of the structure of air supply holes;

Figure 3 is a distribution diagram of air supply holes;

In the figure, 1, the upper thrust plate; 2, the rotor; 3, the lower thrust plate; 4, the gas film layer; 5, the air supply hole;

51. Air supply connection section; 52. Throttle section; 53 Hexagon star pressure equalizing groove section.

Detailed ways

Hereinafter, the present invention will be further described with reference to the accompanying drawings and specific embodiments. It should be noted that, on the premise of no conflict, the embodiments or technical features described below can be combined arbitrarily to form new implementations. example.

Example:

A static pressure thrust air-floating axial bearing with a hexagonal star pressure equalizing groove, as shown in Figure 1, includes an upper thrust plate 1, a rotor 2 and a lower thrust plate 3, all of which are circular, and the upper thrust plate The plate 1 and the lower thrust plate 3 are located on both sides of the rotor 2 respectively. There is a certain gap between the rotor 2 and the upper thrust plate 1 and the lower thrust plate 3. This gap is the gas film layer 4, and the two gas film layers 4 The total thickness is 10um～35um, the upper thrust plate 1 and the lower thrust plate 3 are provided with several upper air supply holes 5 along the circumferential direction; as shown in Fig. 2, the air supply holes 5 include the air supply connecting section 51, the throttling Section 52 and hexagonal star pressure-equalizing groove section 53, and the center lines of the three sections are located on the same axis, the end of the hexagonal star pressure-equalizing groove section 53 on the air supply hole 5 is close to the rotor 2, and the hexagonal star pressure-equalizing groove section 53 height is 5um ~100um, the hexagonal star pressure equalizing groove section 53 is a hexagonal star, and each angle of the hexagonal star is 60°, and the length of each side is equal, so that the airflow can be evenly distributed, and the thickness difference of the entire gas film layer is small.

As shown in FIG. 3 , the upper thrust plate 1 and the lower thrust plate 3 are provided with two rows of air supply holes 5 around the center of the circle, and each row is provided with 5 air supply holes 5 and the air supply holes 5 are evenly distributed around the circumference.

For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all these changes and deformations should fall within the protection scope of the claims of the present invention.

Claims (3)

1. A static pressure thrust air-floating axial bearing with a hexagonal star pressure equalizing groove, including an upper circular upper thrust plate, a rotor and a lower thrust plate, the upper thrust plate and the lower thrust plate are respectively located at On both sides of the rotor, there is a certain gap between the rotor and the upper thrust plate and the lower thrust plate. The gap is an air film layer. There are several air supply holes along the circumferential direction on the upper thrust plate and the lower thrust plate. In that, the air supply hole includes an air supply connection section, a throttle section and a hexagonal star pressure equalizing groove section that are connected in sequence, and the end of the hexagonal star pressure equalizing groove section is facing the rotor, and the height of the hexagonal star pressure equalizing groove section is 5um～100um, the hexagonal star pressure equalizing groove section is a hexagonal star, and each angle of the hexagonal star is 60°, and the length of each side is equal, and the total thickness of the gas film layer is 10um～35um. 2. A kind of static pressure thrust air-floating axial bearing with hexagonal star pressure equalizing groove as claimed in claim 1, it is characterized in that, described gas supply connection section, throttle section and hexagonal star pressure equalizing groove section The centerlines are on the same axis. 3. A kind of static pressure thrust air-floating axial bearing with hexagonal star pressure equalizing groove as claimed in claim 1, it is characterized in that, described upper thrust plate and lower thrust plate are all provided with around the center of the circle. 1-3 rows of air supply holes, each row of air supply holes are evenly distributed around the circumference.

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