CN103047290B - Cone-shaped friction-free rotary air supply air floatation device - Google Patents

Abstract

A conical non-friction rotating air supply air flotation device, including an air flotation shaft, an air flotation sleeve and a base, the air flotation shaft is set in the air flotation sleeve, there is a small gap between the air flotation shaft and the air flotation sleeve, the air flotation shaft The mating surface with the air bearing sleeve is conical, the base is fixed to the bottom surface of the air bearing sleeve, and the surface of the conical annular throttling bearing sleeve is evenly distributed with throttle holes, which are fixed on the inner wall of the air bearing sleeve and between the air bearing sleeve The air intake high-pressure cavity is formed, the air flotation sleeve has an air flotation intake hole and communicates with the intake high pressure cavity, the bottom of the air flotation sleeve has an air supply inlet, and the bottom of the air flotation shaft forms a high pressure with the air flotation sleeve and the base The air supply inlet is connected to the high pressure chamber, the blind hole in the center of the air flotation shaft is connected to the top air outlet, and the air discharge holes are evenly distributed in the circumferential direction of the air flotation sleeve frame and communicated with the gap formed by the air flotation shaft and the air flotation sleeve. There is a circle of concave air unloading grooves on the circumference where the air unloading hole is located, and the air unloading hole is isolated from the throttling hole and the air inlet hole of the air flotation sleeve. The invention can supply air continuously and is not affected by tracheal disturbance.

Description

A conical frictionless rotating air supply air flotation device

technical field

The invention relates to the field of air flotation. the

Background technique

With the development of science and technology, gas lubrication is often used instead of ordinary mechanical lubrication, and high-pressure gas is introduced into the gap between objects in relative motion to form a gas film, avoiding direct contact to achieve frictionless motion.

Air flotation devices have different ways of forming gas films and different gas supply methods. Usually, the gas pipe is used to introduce gas into the high-pressure chamber, but no matter which gas supply method is used, the air pipe must not disturb the air flotation device. For some Compared with the air flotation device with air source movement, there is a big problem in air flotation gas supply. For example, the side of the vertically placed folding hinges connected by hinges, the bottom uses multiple air bearing pads to realize the frictionless unfolding movement in the plane, and it is required that no external force is introduced when unfolding. If each air bearing pad is opened from the outside When the air pipe is introduced, the air floating pad moves with the hinge, and the air supply pipe will disturb the movement of the air floating pad, and there are many air supply lines, which are prone to twisting, bending, and winding, which is not easy to install and maintain; usually the air supply pipe The air cushion attached to the board is introduced from one board to another while supplying air to the board. However, when the hinge board is unfolded from the fitting state, it will be affected by disturbances such as bending and winding of the trachea at the joint, which will interfere with the unfolding of the hinge. the

Contents of the invention

In order to solve the deficiency of the influence of the tracheal bending disturbance when the existing air flotation device supplies air, the present invention provides a conical non-friction rotating air supply air flotation device that can continuously supply air and is not affected by the tracheal disturbance. the

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

A conical non-friction rotating air supply air flotation device, including an air flotation shaft, an air flotation sleeve and a base, the air flotation sleeve is composed of an air flotation sleeve frame and a conical ring-shaped throttling bearing sleeve, and the air flotation shaft is set on In the air flotation sleeve, there is a small gap between the air flotation shaft and the air flotation sleeve, the mating surface of the air flotation shaft and the air flotation sleeve is conical, the base is fixed to the bottom surface of the air flotation sleeve, and the tapered ring Throttling holes are evenly distributed on the surface of the throttle bearing sleeve. The throttle holes are perpendicular to the tapered surface of the tapered annular throttle bearing sleeve. There is a circle of throttle grooves on the inner peripheral surface where the throttle holes are located. The toroidal throttling bearing sleeve is fixed on the inner wall of the air flotation sleeve and forms an air intake high-pressure chamber with the air flotation sleeve. The air flotation sleeve has an air flotation intake hole and communicates with the intake high pressure chamber. There is an air inlet at the bottom of the air flotation sleeve, and the bottom of the air flotation shaft forms a high-pressure chamber with the air flotation sleeve and the base. The air supply inlet communicates with the high pressure chamber, and the center of the air flotation shaft is The blind hole communicates with the top air outlet, and the air flotation sleeve frame has air discharge holes. There is a concave air discharge groove on the circumference, and the air discharge hole is not connected with the throttle hole and the air inlet hole of the air flotation sleeve (that is, they are isolated from each other).

Further, the air flotation inlet and the air supply inlet are supplied with the same gas source through the air pipe, and the top air outlet leads out the high-pressure gas through the air pipe. the

The design idea of the present invention is: according to the principle of the air bearing, to realize the frictionless rotation between the air bearing and the air bearing, and then through the special air supply mode, the high-pressure gas is introduced from the air bearing and drawn out from the air shaft, so as to realize Frictionless rotating air supply. the

The air flotation inlet and the air supply inlet on the air flotation frame are supplied by the same high-pressure gas source, and the high-pressure gas in the intake high-pressure chamber forms an air film in the gap between the air flotation sleeve and the air flotation shaft through the orifice. Most of the gas in the high-pressure chamber flows out from the air outlet through the center hole of the air flotation shaft, and a small part enters the gap between the air flotation sleeve and the air flotation shaft. Exhausted from the air discharge hole, one end of the gap between the air flotation shaft and the air flotation sleeve is connected to the atmosphere, and the other end has an air discharge hole, so there is a pressure gradient in the gap, and part of the gas entering the gap flows out from one side of the gap, and the other part passes through the gas discharge groove. discharge. The conical air flotation device is used because the conical air flotation device can resist a certain axial force and prevent the high-pressure gas in the bottom high-pressure chamber from acting on the air flotation shaft to increase additional force or cause the air flotation shaft to move. the

During the process of unfolding the folded hinges from the attached state to 180° under the action of the hinges, the frictionless rotating air supply device is installed on the rotation axis when the two folded hinges are unfolded, the base, the air bearing sleeve and the One plate is fixed, and the air bearing shaft is connected to the other plate, so the high-pressure gas is transferred from one plate to the other, without being disturbed by the rotation and bending of the trachea, and the outer diameter of the frictionless rotating air supply is less than or equal to the thickness of the hinge plate. Avoid mutual interference between multiple frictionless rotating air supply devices in the pasting state. the

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

Description of drawings

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

Fig. 2 is a schematic diagram of airflow direction of a conical frictionless rotating air supply and air flotation device. the

Fig. 3 is a schematic diagram of the state of the folded hinges being attached. the

Fig. 4 is a schematic diagram of the process of folding and unfolding. the

Detailed ways

Below in conjunction with accompanying drawing, the present invention will be further described. the

Referring to Figures 1 to 4, a conical frictionless rotating air supply air flotation device includes an air flotation shaft 2, an air flotation sleeve 3 and a base 1, and the air flotation sleeve 3 is throttled by the air flotation sleeve frame and the conical ring surface Bearing sleeve 5, the air bearing shaft 2 is set in the air bearing sleeve 3, there is a small gap between the air bearing shaft 2 and the air bearing sleeve 3, and the mating surface of the air bearing shaft 2 and the air bearing sleeve 3 is Conical, the base 1 and the bottom surface of the air bearing sleeve 3 are fixed, and the surface of the conical annular throttle bearing sleeve 5 is evenly distributed with throttle holes 12, and the throttle hole 12 is connected with the conical annular throttle bearing sleeve 5 The tapered surface of the throttle hole is vertical, and there is a circle of throttling grooves on the inner peripheral surface where the throttling hole is located. The conical annular throttling bearing sleeve 5 is fixed on the inner wall of the air flotation sleeve frame and forms a gap between it and the air flotation sleeve frame. Air high pressure chamber 9, air flotation air intake hole 7 is arranged on the air flotation sleeve frame and communicated with the intake high pressure chamber 9, air supply air inlet 8 is provided at the bottom of the air flotation sleeve frame, and the bottom of the air flotation shaft 2 A high pressure chamber 10 is formed with the air flotation sleeve frame and the base 1, the air supply inlet 8 communicates with the high pressure chamber 10, the blind hole 6 in the center of the air flotation shaft 2 communicates with the top air outlet 11, and the air flotation sleeve There are air discharge holes 4 on the frame. The air discharge holes 4 are evenly distributed in the circumferential direction of the air flotation sleeve frame and communicate with the gap formed by the air flotation shaft 2 and the air flotation sleeve 3. There is a concave discharge hole on the circumference where the air discharge hole 4 is located. The air groove, the air discharge hole 4 is not connected with the throttle hole 12 and the air flotation sleeve air inlet hole 7 (that is, they are isolated from each other). The air flotation air inlet 7 and the air supply inlet 8 use the same air source to supply air through the air pipe 13 , and the top air outlet 11 leads out the high-pressure gas through the air pipe 14 . the

The air flotation sleeve 3 of this embodiment can also adopt the method of small hole throttling. the

During the process of unfolding the folded hinge plate 15 from the attached state to 180° under the action of the hinge 16, the frictionless rotating air supply device 17 is installed on the rotation axis when the two-page folded hinge plate 15 is unfolded, and the base 1 , The air bearing sleeve 3 is fixed with one plate, and the air bearing shaft 2 is connected with the other plate, so the high-pressure gas is transferred from one plate to the other, without being disturbed by the rotation and bending of the trachea, and the outer diameter of the frictionless rotating air supply is less than It is equal to the thickness of the hinge plate, avoiding mutual interference between multiple frictionless rotating air supply devices in the pasted state. the

Claims (2)

1. a taper rotates for air flotation device without friction, it is characterized in that: comprise air-bearing shafts, air supporting cover and base, air supporting cover is made up of air supporting stock and tapered ring restrictor bearing housing, described air suspension shaft sleeve is contained in air supporting cover, micro-gap is there is in described air-bearing shafts and air supporting between overlapping, it is tapered that fitting surface is overlapped in described air-bearing shafts and air supporting, described base and air supporting are overlapped bottom surface and are fixed, the uniform throttle orifice in described tapered ring restrictor bearing housing surface, described throttle orifice is vertical with the conical surface of tapered ring restrictor bearing housing, described tapered ring restrictor bearing housing to be fixed on air supporting stock inwall and and form air inlet hyperbaric chamber between air supporting stock, described air supporting stock there is air supporting inlet hole and communicates with air inlet hyperbaric chamber, air feed suction port is had bottom described air supporting stock, with air supporting stock bottom described air-bearing shafts, base forms hyperbaric chamber, described air feed suction port communicates with hyperbaric chamber, described air-bearing shafts center is beaten blind hole and is communicated with air outlet, top, described air supporting stock unloads pore, it is described that to unload pore uniform and overlap with air-bearing shafts and air supporting the gap formed and communicate at air supporting stock circumferencial direction, described pore place of unloading circumferentially has a circle spill to unload air drain, describedly unload pore and throttle orifice and air supporting to overlap inlet hole mutually isolated.

2. a kind of taper as claimed in claim 1 rotates for air flotation device without friction, and it is characterized in that: described air supporting inlet hole and air feed suction port adopt same gas source feed by tracheae, pressurized gas are drawn by tracheae by air outlet, described top.