Split-type swing angle adjustable aerostatic bearing device for rotor static balance, and air flotation support device for static balance of rotating ring-shaped parts

A split-type swing angle adjustable aerostatic bearing device for rotor static balance, comprising:

• a bearing;
• a bearing base;
• a sealed working air cavity;
• an upper base;
• a lower base;
• and
• pillars;
• wherein a first semi-cylindrical working surface is disposed on the bearing, a plurality of micro air holes, having a certain depth, are disposed on the first semi-cylindrical working surface;
• a second semi-cylindrical surface is disposed on the bearing, a plurality of small air holes, having a certain depth, are disposed on the second semi-cylindrical surface;
• the plurality of the micro air holes are communicated with the plurality of the small air holes, the bearing is fixed on the bearing base to form a sealed working air cavity between, the plurality of the small air holes are communicated with the sealed working air cavity, the sealed working air cavity is filled with medium-pressure gas through an air inlet channel, the bearing base and the upper base are in spherical contact with the two pillars, and further swing at a certain angle in a vertical direction;
• the upper base and the lower base are rotated by a certain angle along a circumferential direction of the upper base and the lower base through a rotating device;
• the sealed working air cavity is composed of the bearing, the bearing base, a vertical pressing plate, and a transverse pressing plate;
• a first half O-ring groove is disposed on two sides of the bearing, a second half O-ring groove is disposed on two sides of the bearing base, a gap is disposed on the transverse pressing plate;
• the first half O-ring groove, the second half O-ring groove, and the gap form two O-ring grooves;
• an O-shaped silicone sealing ring is disposed in each of the two O-ring grooves, each of the O-ring grooves is pressed by the vertical pressing plate, the vertical pressing plate is connected to the bearing and the bearing base through a connecting piece, first half-circular sealing grooves are disposed in front and back sides of the bearing, second half-circular sealing grooves are disposed in front and rear sides of the bearing base, the first half-circular sealing grooves and the second half-circular sealing grooves form third half-circular sealing grooves, half-circular silicone gaskets of the same size are disposed on the third half-circular sealing grooves, the two ends of the half-circular silicone gasket are located directly under the O-shaped silicone gasket, each of the half-circular silicone gaskets is pressed by the transverse pressing plate, the transverse pressing plate is connected to the bearing and the bearing base through a connecting piece to form the sealed working air cavity;
• at least one cylindrical protrusion is disposed on the bearing, the cylindrical protrusion is tightly attached to a third cylindrical surface of the bearing base, an axial positioning protrusion structure of the bearing is disposed on the bearing base, a positioning notch of the transverse pressing plate is disposed on the bearing, a positioning protrusion is disposed on the transverse pressing plate, and the positioning protrusion is matched with the positioning notch.

A split-type swing angle adjustable aerostatic bearing device for rotor static balance, comprising:

• a bearing base;
• an air flotation support cover;
• an upper base;
• pillars;
• and
• a lower base;
• wherein a sealed air cavity is disposed between the bearing base and a bearing disposed on the bearing base, the sealed air cavity is connected to an external air supply device through an air inlet channel on the bearing base, a plurality of air holes on the bearing is communicated with the sealed air cavity;
• a through hole communicated with the sealed air cavity is disposed on a bottom surface of the bearing base, the air flotation support cover is disposed under the bearing base, and an opening of the air flotation support cover is sealed to a bottom end surface of the bearing base, so that the air flotation support cover and the bearing base form a gas working air cavity;
• the sealed air cavity is communicated with the gas working air cavity through the through hole;
• a plurality of support cover air holes on the air flotation support cover is communicated with the gas working air cavity;
• a concave surface is disposed on the upper base, the concave surface matches an outer contour of the air flotation support cover, the concave surface is in clearance fit with an outer surface of the air flotation support cover, the air flotation support cover is disposed in the concave surface;
• under working conditions, after gas in the working air cavity penetrates through the plurality of the support cover air holes on the air flotation support cover, a gas mold, having a certain bearing capacity, is formed between the outer surface of the air flotation support cover and the concave surface to float the bearing base, and the bearing base freely swings to realize automatic centering of a rotor static balance device;
• the upper base is connected with the lower base through the pillars, and a distance between the upper base and the lower base is adjusted through the pillars to adjust an elevation of the bearing base.

An air flotation support device for static balance of rotating ring-shaped parts, comprising:

• an air flotation support structure;
• an axial sealing pressing plate;
• a radial sealing pressing plate;
• a connecting pillar;
• a base;
• and
• two axial positioning devices;
• wherein the air flotation support structure is configured to support rotating ring-shaped parts, having a size less than or equal to a semi-cylindrical structure of the rotating ring-shaped parts, an air inlet is disposed on a wall of a first end of the air flotation support structure, the air inlet is communicated with a working air cavity in the air flotation support structure, a range of an angle α between two side walls along a circumferential direction on a working surface of the air flotation support structure is 30°˜180°, namely that a central angle α with respect to an arc on a cross section of the air flotation support structure is 30°˜180°, a plurality of through holes communicated with the working air cavity are disposed on a curved side wall of the air flotation support structure, an open end surface of a second end of the air flotation support structure is sealed and connected through the axial sealing pressing plate, a longitudinal section end of the air flotation support structure is sealed and connected with the radial sealing pressing plate, the radial sealing pressing plate is connected with the base through the connecting pillar;
• the axial positioning devices are respectively disposed on the two ends of the working surface of the air flotation support structure;
• in a working state, a gas penetrates through the air inlet to the working air cavity in the air flotation support structure, then penetrates through a plurality of through holes and enters the working surface of the air flotation support structure, and a gas mold, having a certain bearing capacity, is formed between the gas and a cylindrical surface of the rotating ring-shaped parts to be tested for static balance, so as to float the rotating ring-shaped parts to be tested for static balance.