Powder metallurgy forming air bearing

Abstract

The invention discloses a powder metallurgy forming air bearing, and belongs to the technical field of air floating foot cups, the powder metallurgy forming air bearing comprises an air floating base, a ball valve fixing groove is formed in the upper end of the air floating base, a universal ball head is arranged in the middle of the ball valve fixing groove, and an adjusting screw rod is arranged at the upper end of the universal ball head; a universal ball head is arranged at the upper end of the air floatation base, a ball head fixing seat is arranged at the position, located on the surface of the universal ball head, of the upper end of the air floatation base, and a connecting port is formed in the side edge of the air floatation base. The gas enables a gap between an adjusting screw rod processed by a powder metallurgy material and a bearing surface to form a gas film, and a reaction force is generated between a powder metallurgy body and the bearing surface, so that a plane air floatation plate made by powder metallurgy relatively suspends, and the plane air floatation plate and the bearing surface work in a non-contact manner, the gas plays a supporting role, the bearing capacity is improved, and the service life of the plane air floatation plate is prolonged. The stable rigidity is realized.

Description

Technical Field

[0001] The invention belongs to the technical field of air-floating foot cups, and in particular relates to a powder metallurgy formed air-floating bearing. Background Art

[0002] At present, most of the air-floating foot cups on the market are made of graphene. Graphene will produce powder during long-term operation, which is harmful to the human body if inhaled. When using foot cups made of graphene materials, the operation of the equipment will cause a small amount of wear on the graphene, affecting the accuracy of the equipment.

[0003] The existing powder metallurgy formed air floating foot cup has the following problems when in use: the bonding force of graphene material is small, and it is easy to age and fall off to produce dust during the penetration of high-pressure airflow;

[0004] 2. Graphite materials are very brittle and are prone to breakage and failure due to high pressure in air flotation application products;

[0005] 3. The contact and friction between graphite material and the bearing surface can easily generate dust and clog the graphite pores. Summary of the invention

[0006] To solve the problems raised in the above background technology, the present invention provides a powder metallurgy formed air bearing, which has the characteristics of powder not easy to fall off, stable and uniform air film, extremely large bearing capacity and stable rigidity.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a powder metallurgy formed air flotation bearing, comprising an air flotation base, a ball valve fixing groove is arranged at the upper end of the air flotation base, a universal ball head is arranged in the middle of the ball valve fixing groove, an adjusting screw is arranged at the upper end of the universal ball head, a ball head fixing seat is arranged on the surface of the universal ball head at the upper end of the air flotation base, a connecting port is arranged on the side of the air flotation base, an air inlet interface is connected to the side of the connecting port, a straight airflow path connected to the connecting port is arranged inside the air flotation base, a multi-layer annular airflow path is arranged inside the air flotation base, and a flat air flotation plate is arranged at the bottom of the air flotation base.

[0008] Preferably, the air floating base can be configured as a rectangular parallelepiped, cylindrical or cube structure.

[0009] Preferably, the ball head fixing seat and the air floating base are fastened with bolts.

[0010] Preferably, an adjusting nut is provided on the surface of the adjusting screw.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] The present invention conveys gas into the air floating base, and the gas is filled in the multi-layer annular path of the air flow to form high-pressure gas. The gas forms an air film in the gap between the adjusting screw made of powder metallurgy material and the bearing surface, and generates a reaction force between the powder metallurgy body and the bearing surface, so that the air floating shaft made of powder metallurgy is relatively suspended, and the plane air floating plate and the bearing surface work in a non-contact manner, so that the gas plays a supporting role, improves the bearing capacity, and has stable rigidity. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of a rectangular air-floating foot cup of the present invention;

[0014] Figure 2 For the present invention Figure 1 Left view of;

[0015] Figure 3 This is a schematic diagram of the structure of a rectangular air-floating base of the present invention;

[0016] Figure 4 This is a schematic diagram of the internal structure of the rectangular air floating base of the present invention;

[0017] Figure 5 This is a schematic diagram of the structure of a circular air-floating foot cup of the present invention;

[0018] Figure 6 This is a schematic diagram of the internal structure of the circular air floating base of the present invention;

[0019] Figure 7 This is a schematic diagram of the circular air-floating base structure of the present invention;

[0020] In the figure: 1. Adjusting screw; 2. Adjusting nut; 3. Air flotation base; 4. Air inlet interface; 5. Universal ball head; 6. Ball head fixing seat; 7. Flat air flotation plate; 8. Connecting port; 9. Ball valve fixing groove; 10. Straight air flow path; 11. Multi-layer annular air flow path. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Example 1

[0023] See also Figure 1-7The present invention provides the following technical solutions: a powder metallurgy formed air-floating bearing, comprising an air-floating base 3, a ball valve fixing groove 9 is arranged at the upper end of the air-floating base 3, a universal ball head 5 is arranged in the middle of the ball valve fixing groove 9, an adjusting screw 1 is arranged at the upper end of the universal ball head 5, a ball head fixing seat 6 is arranged on the surface of the universal ball head 5 at the upper end of the air-floating base 3, a connecting port 8 is arranged on the side of the air-floating base 3, an air inlet interface 4 is connected to the side of the connecting port 8, an air flow straight path 10 connected to the connecting port 8 is arranged inside the air-floating base 3, an air flow multi-layer annular path 11 is arranged inside the air-floating base 3, and a flat air-floating plate 7 is arranged at the bottom of the air-floating base 3.

[0024] Specifically, the air floating base 3 can be set to a rectangular parallelepiped, cylindrical or cube structure.

[0025] By adopting the above technical solution, it is convenient to process and form metal parts of different shapes.

[0026] Specifically, the ball head fixing seat 6 and the air floating base 3 are fastened and connected by bolts.

[0027] By adopting the above technical solution, it is convenient to rotate and adjust the universal ball head 5 between the ball head fixing seat 6 and the ball valve fixing groove 9.

[0028] Specifically, an adjusting nut 2 is disposed on the surface of the adjusting screw 1 .

[0029] By adopting the above technical solution, it is convenient to fix the air floating base 3 after the height adjustment.

[0030] The working principle and use process of the present invention: When the present invention is used, metal powder with a particle size of 0.1um-10um is used, including but not limited to metal powder metallurgy materials such as stainless steel and titanium alloy. The powder metallurgy material is pressed into a sheet or cylindrical shape by a mold and then sintered at a high temperature. The air inlet interface 4 is connected to an external air pump, and the gas is transported into the air flotation base 3. The gas is filled in the multi-layer annular path 11 of the air flow to form a high-pressure gas. The gas forms an air film in the gap between the adjusting screw 1 processed by the powder metallurgy material and the bearing surface, and a reaction force is generated between the powder metallurgy body and the bearing surface, so that the air flotation shaft made of powder metallurgy is relatively suspended, and the flat air flotation plate 7 and the bearing surface work non-contactly, so that the gas plays a lubricating role.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A powder metallurgy formed air bearing, comprising an air bearing base (3), characterized in that: The upper end of the air-floating base (3) is provided with a ball valve fixing groove (9), a universal ball head (5) is provided in the middle of the ball valve fixing groove (9), an adjusting screw (1) is provided at the upper end of the universal ball head (5), a ball head fixing seat (6) is provided at the upper end of the air-floating base (3) and located on the surface of the universal ball head (5), a connecting port (4) is provided on the side of the air-floating base (3), an air flow straight path (10) connected to the connecting port (8) is provided inside the air-floating base (3), an air flow multi-layer annular path (11) is provided inside the air-floating base (3), and a flat air-floating plate (7) is provided at the bottom of the air-floating base (3).

2. A powder metallurgy formed air bearing according to claim 1, characterized in that: The air floating base (3) can be configured as a rectangular parallelepiped, cylindrical or cubic structure.

3. The powder metallurgy formed air bearing according to claim 1, characterized in that: The ball head fixing seat (6) and the air floating base (3) are fastened together by bolts.

4. The powder metallurgy formed air bearing according to claim 1, characterized in that: An adjusting nut (2) is provided on the surface of the adjusting screw rod (1).

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