CN103016531B - Friction-free rotary air supply air flotation device - Google Patents

Abstract

A frictionless rotating air supply air flotation device. There are four annular sealing grooves on both sides of the annular air chamber groove at the upper end of the inner core. Radial throttling holes are evenly distributed on the bottom area along the circumference, and the radial throttling holes are connected at the center of the circle along the radial direction. The air inlet holes are connected, and the bottom end of the inner core is punched with blind holes along the axial direction to form the bottom axial throttle holes, and the bottom axial throttle holes are evenly distributed at the bottom of the inner core in the axial direction and the bottom radial throttle holes Connected, the top of the inner core is punched with blind holes along the axial direction to form the top axial throttling hole, the top axial throttling holes are evenly distributed on the top of the inner core to communicate with the middle radial throttling hole and the air inlet in the axial direction, and the outer The upper part of the core has a threaded air inlet, and the middle part of the outer core is evenly distributed with pressure relief holes, which communicate with the pressure relief grooves on the inner wall of the outer core. The invention can supply air continuously and is not affected by tracheal disturbance.

Description

Frictionless rotating air supply air flotation device

technical field

The invention relates to the field of air flotation.

Background technique

The air suspension system can be applied not only in the field of axial movement of the air bearing shaft, but also in the field of rotation of the air bearing shaft. It uses gas instead of oil as a lubricant to form an air film between the shaft and the bearing sleeve, so that The ideal support element where the movable and stationary surfaces avoid direct contact.

In the application of a thrust air bearing, the thrust bearing moves with the carrier in a plane without friction, such as realizing the frictionless unfolding movement of a vertically placed multi-leaf folding hinge in a plane, the bottom of the hinge plate The frictionless support is provided by the thrust air bearing and the frictionless rotation between the hinges is realized. At the same time, the thrust air bearing moves in the plane without friction through the air cushion to meet the requirement of frictionless unfolding of the hinge. The thrust air bearing moves with the hinge plate, so if the traditional air supply method is adopted, the air supply pipeline will have a disturbing effect on the movement of the thrust air bearing, and there are many air supply lines, which are prone to torsion and entanglement. Easy to install and maintain.

Contents of the invention

In order to solve the deficiencies of the thrust bearing movement influence of the existing air flotation device, the present invention provides a frictionless rotating air supply air flotation device that can continuously supply air and is not affected by tracheal disturbance.

The technical solution adopted by the present invention to solve its technical problems is:

A frictionless rotating air supply air flotation device, comprising an inner core, an outer core and an end cover, the inner core is set inside the outer core, the end cover includes an upper end cover and a lower end cover, and the upper and lower ends of the outer core are passed through bolts It is fixed with the upper end cover and the lower end cover, and there is a small gap between the inner core and the outer core, as well as the inner core, the upper end cover and the lower end cover;

There is an annular air cavity groove on the upper end of the inner core, and an annular sealing groove is formed on both sides of the annular air cavity groove, and holes are drilled in the annular air cavity groove along the radial direction to the center of the circle to form air inlet holes. The middle part of the inner core and the area near the bottom are uniformly distributed with radial throttle holes along the circumference, and the radial throttle holes are connected at the center of the circle along the radial direction, and the inner core is formed by punching a blind hole axially from the center of the top circle. The air outlet is connected with the radial throttle hole and the air inlet hole, and the bottom end of the inner core is punched with a blind hole along the axial direction to form a bottom axial throttle hole, and the bottom axial throttle hole is The bottom end of the inner core communicates with the bottom radial throttle hole in the axial direction, and the top end of the inner core is punched with blind holes along the axial direction to form the top axial throttle hole, and the top axial throttle holes are evenly distributed in the The top end of the inner core communicates with the radial throttle hole in the middle in the axial direction, and the axial throttle hole also communicates with the air intake hole. The upper end cover and the lower end cover are uniformly distributed with pressure relief holes, and the upper part of the outer core has There is a threaded air inlet, and pressure relief holes are evenly distributed in the middle of the outer core, and the pressure relief holes communicate with the pressure relief grooves on the inner wall of the outer core.

Further, the frictionless rotating air supply air flotation device also includes a total air source, and the air outlet pipe supplies air to the thrust air bearing moving with the frictionless rotating air supply air flotation device as the center of a circle.

Furthermore, the frictionless rotating air supply air flotation device also includes a total air source, and the gas outlet pipe supplies air to another frictionless rotating air supply air flotation device moving with it as the center of a circle. Air can be supplied in a cascading manner, for example, the air outlet pipe of the last frictionless rotating air supply air flotation device is supplied with air to the thrust air bearing moving with the frictionless rotating air supply air flotation device as the center of circle.

The design idea of the present invention is: the frictionless rotating air supply air flotation device is actually a composite air bearing including three major parts: a labyrinth seal, a radial air bearing, and a thrust air bearing.

An annular inner core air cavity is opened on the inner core, and four sealing grooves are respectively opened on both sides of the air cavity. When the compressed gas enters from the outer core, it first enters the annular air cavity of the inner core. Since there is a gap between the outer core and the inner core, there are four sealing grooves on both sides of the annular air cavity, which can effectively reduce the leakage of gas. The amount, so that most of the gas enters the air inlet of the inner core, which is a labyrinth seal.

Most of the compressed gas entering from the air inlet of the inner core is output from the air outlet of the inner core, and a small part is supplied to the radial orifice and axial orifice distributed on the inner core through the internal air channel. The high-pressure gas passes through the orifice to form an air film between the inner core, outer core and end cap to realize the frictionless rotation of the inner core. It can be regarded as a complex of radial air bearing and thrust air bearing.

There are pressure relief holes on the upper and lower end covers and the outer core, and the pressure relief holes communicate with the atmosphere to ensure that there is a pressure difference in the gap between the inner core and the outer core, and the high-pressure gas enters the gap through the throttle hole to form a gas film. In order to reduce the leakage of the labyrinth seal, there is a certain distance between the radial air leakage hole and the sealing groove, so the air leakage hole of the upper end cover is opened on a circle whose diameter is smaller than that of the inner core, and there is an air outlet on the upper end surface, so The upper end face thrust bearing is a toroidal thrust air bearing with a smaller diameter, and the exhaust hole of the lower end cover is opened on a circle equal to the diameter of the inner core, so the lower end face thrust air bearing is a circular thrust air bearings. The lower end cover is provided with an inner bolt hole and an outer bolt hole, the inner bolt hole is used to connect the lower end cover and the outer core, and the outer bolt hole is used to fix the whole device on a platform. An air inlet is opened on the upper part of the outer core, and high-pressure gas is input from the air inlet. There are threads on the air inlet, which are used to connect with the joint of the air inlet pipe.

The inner core of the frictionless rotating air supply air flotation device can rotate without friction in the outer core, and most of the gas entering the inner core from the outer core is output from the air outlet of the inner core, and the air outlet is connected to the air pipe for supplying air without friction The floating device is a thrust air bearing that moves in the center of the circle. As shown in Figure 3, the air pipe rotates with the thrust bearing, and there will be no twisting, stretching, and winding during the process, and no additional force will be affected on the thrust bearing.

The frictionless rotary air supply air flotation device is also an air thrust bearing with good performance, through the air outlet of the frictionless rotary air supply air flotation device, the air can be directly supplied to another frictionless rotary air supply air flotation moving with it as the center of the circle The device realizes continuous air supply, as shown in Figure 4, the relative displacement between two adjacent frictionless rotating air supplies remains unchanged, the air pipe does not produce additional force on its movement, and the air supply method is simple.

The beneficial effect of the invention is that the gas can be supplied continuously without being affected by the disturbance of the trachea.

Description of drawings

Figure 1 is a schematic diagram of a frictionless rotating air supply air flotation device.

Fig. 2 is a perspective view of the inner core of the frictionless rotating air supply air flotation device.

Fig. 3 is a schematic diagram of the air supply of the frictionless rotary air supply air flotation device.

Fig. 4 is another air supply principle diagram of the frictionless rotary air supply air flotation device.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

Referring to Figures 1 to 4, a frictionless rotating air supply air flotation device includes an inner core 13, an outer core 12 and an end cover, the inner core 13 is set in the outer core 12, and the end cover includes an upper end cover 10, The lower end cover 6, the upper and lower ends of the outer core 12 are fixed to the upper end cover 10 and the lower end cover 6 by bolts, and there are tiny gap;

The upper end of the inner core 13 is provided with an annular air chamber groove 3, and four annular sealing grooves 2 are respectively arranged on both sides of the annular air chamber groove 3, and holes are perforated in the annular air chamber groove 3 along the radial direction to pass through. Air intake holes 8 are formed toward the center of the circle, radial throttle holes 1 are evenly distributed along the circumference of the inner core 13 in the middle and near the bottom area, and the radial throttle holes 1 are connected at the center of the circle along the radial direction, and the inner core 13 A blind hole is drilled from the center of the top circle in the axial direction to form an air outlet 5, and the air outlet 5 communicates with the radial throttle hole 1 and the air inlet 8, and the bottom end of the inner core 13 is punched with a blind hole in the axial direction to form a bottom end axial throttling holes 4, the bottom axial throttling holes 4 are evenly distributed at the bottom of the inner core and communicate with the radial throttling holes 1 at the bottom in the axial direction, and the top end of the inner core 13 is along the axial direction The top axial throttle hole 20 is formed by drilling blind holes, and the top axial throttle hole 20 is evenly distributed on the top of the inner core to communicate with the middle radial throttle hole 1 in the axial direction, and the axial throttle hole 20 is also It communicates with the air inlet 8, and the upper end cover 10 and the lower end cover 6 are evenly distributed with upper pressure relief holes 9 and lower pressure relief holes 14, and the upper part of the outer core 12 has a threaded air inlet 7, and the outer core 12 has a threaded air inlet 7. The middle circumference of the core 12 is evenly distributed (at least four) pressure relief holes 11, and the pressure relief holes 11 communicate with the pressure relief grooves on the inner wall of the outer core.

The frictionless rotary air supply air flotation device 18 is supplied with air by the total gas source 19, and the frictionless rotary air supply air flotation device 18 is supplied with gas by the air outlet 5 connected to the air pipe 17. The frictionless rotary air supply air flotation device 18 is The thrust air bearing 15 whose center of circle motion locus is 16.

The frictionless rotating air supply air flotation device 18 air outlet 5 is connected to the air pipe 17 to supply air to another frictionless rotating air supply air flotation device that moves with it as the center of the circle and has a trajectory of 16, and the gas supply can be performed in a cascading manner. Realize continuous air supply without being affected by tracheal disturbance.

Claims (3)

1. A frictionless rotating air supply air flotation device, characterized in that: it comprises an inner core, an outer core and an end cover, the inner core is sleeved in the outer core, the end cover includes an upper end cover and a lower end cover, and the outer The upper and lower ends of the core are fixed with the upper end cover and the lower end cover by bolts, and there are small gaps between the inner core and the outer core, and between the inner core and the upper end cover and the lower end cover; There is an annular air cavity groove on the upper end of the inner core, and an annular sealing groove is formed on both sides of the annular air cavity groove, and holes are drilled in the annular air cavity groove along the radial direction to the center of the circle to form air inlet holes. The middle part of the inner core and the area near the bottom are uniformly distributed with radial throttle holes along the circumference, and the radial throttle holes are connected at the center of the circle along the radial direction, and the inner core is formed by punching a blind hole axially from the center of the top circle. The air outlet is connected with the radial throttle hole and the air inlet hole, and the bottom end of the inner core is punched with a blind hole along the axial direction to form a bottom axial throttle hole, and the bottom axial throttle hole is The bottom end of the inner core communicates with the bottom radial throttle hole in the axial direction, and the top end of the inner core is punched with blind holes along the axial direction to form the top axial throttle hole, and the top axial throttle holes are evenly distributed in the The top end of the inner core communicates with the radial throttle hole in the middle in the axial direction, and the axial throttle hole also communicates with the air intake hole. The upper end cover and the lower end cover are uniformly distributed with pressure relief holes, and the upper part of the outer core has There is a threaded air inlet, and pressure relief holes are evenly distributed in the middle of the outer core, and the pressure relief holes communicate with the pressure relief grooves on the inner wall of the outer core. 2. The frictionless rotating air supply air flotation device according to claim 1, characterized in that: the frictionless rotating air supply air flotation device also includes a total gas source, and the air outlet is connected to the air pipe to supply air without friction The rotary air supply air flotation device is a thrust air bearing with circular center movement. 3. The frictionless rotary air supply air flotation device according to claim 1, characterized in that: the frictionless rotary air supply air flotation device also includes a total air source, and the air outlet is connected to the air pipe to supply air without friction The rotary air supply air flotation device is another frictionless rotary air supply air flotation device that moves around the center of the circle.