A conical positioning high pressure disc gas bearing with single side air inlet and a using method thereof

Abstract

The application discloses a single-side air inlet conical surface positioning high-pressure disc gas bearing and a use method thereof. The single-side air inlet conical surface positioning high-pressure disc gas bearing comprises a positioning spindle (1) and a disc assembly sleeved on a shaft section of the positioning spindle (1). The positioning spindle (1) is formed by welding left, middle and right shaft sections through end faces. The disc assembly comprises disc A (5) and disc B (13). The left shaft section of the positioning spindle (1) is sequentially connected with a high-pressure outer air chamber (10) and a high-pressure inner air chamber (9) from outside. The positioning spindle (1) is internally provided with a left-penetrating positioning spindle internal cylindrical hole. An inner sleeve (7) is arranged in the positioning spindle internal cylindrical hole. The single-side air inlet conical surface positioning high-pressure disc gas bearing can be reliably positioned. When the positioning spindle with different conical surface interval widths is equipped, the gas bearing can be used in high-pressure bearing experimental research under different working gas film heights, and is used for measuring the speed field and the temperature field of the working disc of the experimental bearing.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of high-pressure gas bearings, and particularly relates to a single-side air inlet conical surface positioning high-pressure disc gas bearing and a use method. BACKGROUND

[0002] A high-pressure gas bearing uses high-pressure gas as a lubricant, and transmits the air supply pressure to the bearing working surface through the transmission of the gas film pressure, thereby supporting external loads. The homogenization effect of the high-pressure gas lubrication film makes the high-pressure gas bearing have the advantages of large bearing capacity, small friction coefficient, low wear rate, high working precision and long working life.

[0003] The invention patent with the patent number ZL201610049454.7, a high-pressure disc thrust gas bearing using double symmetrical contraction section air supply and a design method, realizes supersonic outflow of the bearing gap through streamline design of the bearing structure, and eliminates the limitation of the air supply pressure. However, the gas bearing uses symmetrical center air supply holes on the upper and lower sides to supply air from both sides, which excludes the installation space of the positioning mandrel, cannot design the positioning mandrel, and is difficult to ensure the coaxiality of the upper and lower working discs in the actual work of the bearing. In addition, the two air supply pipes are arranged on the upper and lower sides, which partially blocks the disc, is not convenient for the approach and measurement of the testing instrument, cannot realize 360-degree observation of the disc, and is difficult to ensure the experimental test effect.

[0004] The invention patent with the patent number ZL201910869086.4, a visible high-pressure quartz glass disc gas bearing and a use method thereof, proposes to use a quartz glass disc to provide light path conditions, and realize visual observation of the gas film gap flow field. However, the gas bearing still uses symmetrical center air supply holes on the upper and lower sides to supply air from both sides, which is difficult to ensure the experimental test effect.

[0005] The high-pressure disc gas bearing is usually used under high pressure and heavy load, and needs to be accurately positioned by the positioning mandrel. Therefore, it is necessary to modify the symmetrical air supply mode from both sides, and to invent a high-pressure disc gas bearing with a positioning mandrel and a conical surface positioning function, which can be supplied with air from one side, and is put into the experimental research of the high-pressure gas bearing. SUMMARY

[0006] In view of the problems in the prior art, the application provides a conical surface positioning high-pressure disc gas bearing which can be reliably positioned and supplied with air from one side. When the positioning mandrel with different conical surface widths is equipped, the gas bearing can be used in the experimental research of the high-pressure bearing under different working gas film heights, and is used to measure the velocity field and temperature field in the gap of the experimental bearing working disc.

[0007] The technical scheme adopted by the application to solve the problems in the prior art is as follows:

[0008] A single-sided air inlet conical surface positioning high-pressure disc gas bearing, comprising a positioning mandrel 1 and a disc assembly sleeved on the shaft section of the positioning mandrel 1, the positioning mandrel 1 is formed by welding left shaft section, middle shaft section and right shaft section through end face, the left shaft section of the positioning mandrel 1 is connected with high-pressure outer air chamber 10 and high-pressure inner air chamber 9 in sequence from outside to inside, the positioning mandrel 1 is provided with a left-through positioning mandrel internal cylindrical hole, the positioning mandrel internal cylindrical hole is provided with an inner sleeve 7, the left end of the inner sleeve 7 extends out of the positioning mandrel and penetrates through the high-pressure outer air chamber 10, and the tail end is arranged in the high-pressure inner air chamber 9, and the right end wall of the inner sleeve 7 is provided with symmetrical circular holes or key groove holes 701;

[0009] The disc assembly comprises disc A5 and disc B13, the disc A5 and the disc B13 are respectively designed with positioning inner conical surfaces, the two positioning inner conical surfaces are arranged in left-right symmetry and have the same taper, the positioning mandrel is designed with two positioning outer conical surfaces matched with the positioning inner conical surfaces, and the disc A5 and the disc B13 are coaxial through the automatic centering effect of the conical surface matching after being assembled on the positioning mandrel, the gas film end surface of the disc A5 and the disc B13 comprises a curved surface modeling local contraction profile and a straight line segment parallel to each other, and the gas film end surface of the disc A5 and the disc B13 forms a gas film gap;

[0010] The center of the middle shaft section of the positioning mandrel is provided with a plurality of symmetrical radial gas supply grooves 10207, the gas supply grooves are provided with left-right symmetrical curved surface modeling contraction profiles C10201, one end of the contraction profile is tangent to the cylindrical through hole in the middle shaft section, and the other end is connected with the local contraction profile of the disc A5 and the disc B13 to form a complete contraction section profile, so as to adjust and accelerate the high-pressure airflow in the gap flow channel;

[0011] The outer cylindrical surface of the high-pressure outer air chamber 10 is provided with an external threaded hole perpendicular to the axial direction, which is used for communication with an external high-pressure pipeline. The left end of the high-pressure inner air chamber 9 is provided with an external threaded hole, which is used for communication with another external high-pressure pipeline. The outer cylindrical surface of the inner sleeve 7 and the internal cylindrical hole of the positioning mandrel form an annular air flow channel. The left end of the inner sleeve is communicated with the high-pressure inner air chamber 9. The inner sleeve 7 is installed at the axial center of the internal cylindrical hole of the positioning mandrel, and they are coaxially arranged. One high-pressure air flow enters the inner hole of the inner sleeve 7 from the high-pressure inner air chamber 9, flows along the inner hole of the inner sleeve 7 from the left end to the right end, and then flows out from the right end hole or key groove hole 701 of the inner sleeve 7, enters the annular air flow channel between the outer cylindrical surface of the inner sleeve and the internal cylindrical hole of the positioning mandrel, and flows from right to left. Another high-pressure air flow enters from the high-pressure outer air chamber 10 and flows along the annular air flow channel from left to right. After the two air flows converge, they enter the radial gas supply grooves 10207 in the middle shaft section of the positioning mandrel, and then enter the gap between the disc A and the disc B to form a high-pressure lubricating air film.

[0012] The disc A 5 is fixed on the positioning mandrel 1 through the stop washer A6 and the circular nut A11. The disc B 13 is fixed on the positioning mandrel 1 through the stop washer B3 and the circular nut B2. The center of the disc A 5 is sequentially provided with an inner tapered hole A502, a sealing groove A505 and a cylindrical hole A506. The inner tapered hole A502 is matched with the corresponding outer tapered surface of the positioning mandrel 1. The sealing groove A505 is used for leaving a feed position during machining and forms a sealing space with the outer cylindrical surface of the middle part of the left shaft section of the positioning mandrel. An O-shaped sealing ring 12 is arranged in the sealing space to ensure that the high-pressure air flowing through the gap flow channel of the disc does not leak from the tapered surface gap. The air film end face of the disc A 5 is provided with a locally contracted profile A501 with a curved surface. One end of the profile A501 is tangent to the parallel end face A504 of the disc A 5, and the other end is connected to the contracted profile C10201 in the radial gas supply groove of the middle shaft section of the positioning mandrel 1 to form a complete contracted section profile.

[0013] The outer circumference of the left shaft section 103 of the positioning mandrel is provided with a pairing tube external thread B10305, a fine-pitch external thread A10301, an outer cylindrical surface 10306 of the left shaft section of the positioning mandrel, and an outer conical surface A110302 that mates with the inner conical hole of the disc A5. The interior is provided with a central through hole, namely the inner cylindrical hole 10304 of the left shaft section of the positioning mandrel. The pairing tube external thread B10305 is connected to the high-pressure outer air chamber 10, and the fine-pitch external thread A10301 is connected to the locking washer A6 and the round nut A11, which can make the disc A5 and the positioning mandrel 1 fit firmly and prevent loosening. The outer cylindrical surface 10306 of the left shaft section of the positioning mandrel and the sealing groove of the disc A5 form a sealing space for installing the O-ring seal 12. The small end of the outer conical surface of the left shaft section of the positioning mandrel is on the left and the large end is on the right. The inner sleeve 7 is placed in the central through hole.

[0014] The central section of the positioning mandrel is symmetrical from left to right. Its outer circumference is sequentially provided with an outer conical surface A210202 that mates with the inner conical hole of disk A, a cylindrical surface 10208 on the central section of the positioning mandrel, and an outer conical surface B210206 that mates with the inner conical hole of disk B. The outer conical surface A210202 mates with the inner conical hole of disk A has its smaller end on the left and its larger end on the right, forming a complete left outer conical surface with the outer conical surface A110302 on the left section that mates with the inner conical hole of disk A. This left outer conical surface mates with the inner conical hole of disk A5, allowing disk A5 to be accurately positioned on the positioning mandrel. The outer conical surface B210206 on the central section, mates with the inner conical hole of disk B, has its larger end on the left and its smaller end on the right. The head is on the right, and the outer conical surface B110106 of the right shaft section, which mates with the inner conical hole of disk B, forms a complete right outer conical surface. This right outer conical surface mates with the inner conical hole of disk B, allowing disk B to be accurately positioned on the positioning mandrel. The central axis of the positioning mandrel's central shaft section has a cylindrical through hole with the same diameter as the central through hole of the left shaft section. The central radial axis of the positioning mandrel's central shaft section has several symmetrically arranged radial air supply grooves 10207. These air supply grooves have symmetrical curved surface contraction profiles C10201. One end of these contraction profiles is tangent to the cylindrical through hole inside the central shaft section, and the other end connects with the partial contraction profiles of disks A5 and B13 to form a complete contraction section profile. Figure 2 Local magnification in Figure I As shown, it is used to adjust and accelerate the high-pressure airflow in the gap channel.

[0015] The outer periphery of the positioning mandrel right shaft section is provided with an outer taper surface B110106 matched with the inner taper hole of the disc B, an outer cylindrical surface 10107 of the positioning mandrel right shaft section, a fine tooth outer thread B10101 and a flat square E10104 in sequence, and is internally provided with a cylindrical hole with the same diameter as the central through hole of the positioning mandrel left shaft section, i.e. an inner cylindrical hole 10102 of the positioning mandrel right shaft section, and a blind hole 10103 with the same outer diameter as the inner sleeve 7, the diameter of the blind hole being smaller than that of the inner cylindrical hole 10102 of the positioning mandrel right shaft section; the small end of the outer taper surface B110106 matched with the inner taper hole of the disc B is on the right, and the large end is on the left; the outer cylindrical surface 10107 of the positioning mandrel right shaft section forms a sealing space with the sealing groove B1304 of the disc B13 to place the O-shaped sealing ring; the fine tooth outer thread B10101 is connected with the stop washer B3 and the circular nut B2 to make the disc B13 and the positioning mandrel firmly cooperate and prevent loosening; the inner cylindrical hole 10102 of the positioning mandrel right shaft section is connected with the inner cylindrical hole 10204 of the positioning mandrel middle shaft section and the inner cylindrical hole 10304 of the positioning mandrel left shaft section to form a complete inner cylindrical hole of the positioning mandrel.

[0016] The outer cylindrical surface of the high-pressure outer gas chamber 10 is provided with an outer thread hole perpendicular to the axial direction on one side, and the inner wall of the outer thread hole is provided with a gas supply pipe thread B1002, which is connected with an external high-pressure pipeline through a pipe joint; the left end of the high-pressure outer gas chamber 10 is internally provided with a fine tooth inner thread 1004, which is connected with the outer screw plug of the clamping sleeve type straight pipe joint 8; the right end surface of the high-pressure outer gas chamber 10 is provided with a matched pipe inner thread B1005, which is connected with the matched pipe outer thread B10305 of the left end of the positioning mandrel, and the left end of the outer periphery of the high-pressure outer gas chamber 10 is provided with a matched pipe outer thread A1001, which is connected with the high-pressure inner gas chamber 9.

[0017] The clamping sleeve type straight pipe joint 8 is a standard part, the inner screw plug and the conical accessory tightly hold the outer cylindrical surface of the inner sleeve 7, realize the isolation and sealing between the outer gas chamber and the inner gas chamber, so that the high-pressure outer gas chamber 10 forms a closed chamber with gas inlet and outlet, and the high-pressure gas enters from the thread hole of the outer cylindrical surface and flows out from the annular channel between the cylindrical hole of the positioning mandrel and the inner sleeve.

[0018] The right end inner wall of the high-pressure inner plenum 9 is provided with a mating pipe internal thread A901, which is connected with the high-pressure outer plenum 10. The left end inner wall of the high-pressure inner plenum 9 is provided with a gas supply pipe thread A902, which is connected with another external high-pressure pipeline through a pipe joint. A flange plate 906 and six flange mounting holes 904 are arranged at the left end of the high-pressure inner plenum 9, which facilitates the fixation of the entire bearing assembly to the experimental support. The internal space of the high-pressure inner plenum 9 accommodates the left end of the entire collet-type straight-through pipe joint 8 and the inner sleeve 7. The internal space of the high-pressure inner plenum 9 forms a closed chamber with gas inlet and outlet. High-pressure gas enters the chamber from the threaded hole at the left end of the high-pressure inner plenum 9, and then enters the inner sleeve from the left end of the inner sleeve, and flows out of the high-pressure inner plenum.

[0019] The main body of the inner sleeve 7 is a thin-walled stainless steel pipe, the right end of which is sealed with sealing filler 4. Symmetrical round holes or key groove holes 701 are machined on the inner sleeve 7 wall surface near the sealing portion. The right end of the inner sleeve 7 extends into the blind hole 10103 inside the positioning mandrel right shaft section, achieving positioning of the right end of the inner sleeve 7. The left end of the inner sleeve 7 is connected and fixed with the collet-type straight-through pipe joint 8, and the left end surface of the inner sleeve 7 extends into the high-pressure inner plenum 9, and the inner sleeve is in communication with the internal space of the high-pressure inner plenum 9.

[0020] The wall curve of the disc A5 and the disc B13 rotates one circle around the center axis of the positioning mandrel to form double-symmetrical contraction sections, which smoothly accelerates the gas flow of the radial gas supply groove 10207 into the disc gap, and the gas flow flows out of the parallel gas film gap outlet at supersonic speed.

[0021] The left and right contraction section profiles in the radial gas supply groove 10207 are composed of three arc lines connected and tangent to each other. The arc line near the internal cylindrical hole of the positioning mandrel is tangent to the cylindrical hole. The arc line near the outer taper surface of the positioning mandrel has the same curve equation as the curve wall of the disc.

[0022] The width of the cylindrical part between the left outer taper surface and the right outer taper surface of the positioning mandrel 1 determines the gap height between the two discs. If the high-pressure disc gas bearing of different gas film gap heights is to be studied, positioning mandrels with different cylindrical part widths need to be designed.

[0023] The cross-sectional area of the annular gas flow passage between the internal cylindrical hole of the positioning mandrel 1 and the outer cylindrical surface of the inner sleeve 7 should be equal to the cross-sectional area of the gas flow passage formed by the inner hole of the inner sleeve, so that the mass flow rates of the two high-pressure gas flows are the same.

[0024] A flat square, i.e. flat square C903 and flat square D1003, is arranged on the outer periphery of the high-pressure inner plenum 9 and the high-pressure outer plenum 10.

[0025] A flat square E10104 is arranged at the right end of the right shaft section of the positioning mandrel.

[0026] The small diameter section of the two discs is provided with a flat square, i.e. flat square A503 and flat square B1303.

[0027] The materials of the disc B13 and the disc A5 are selected according to different experimental purposes. When used for measuring the pressure and temperature of the gas film side wall surface, the material of the disc B13 is quartz glass, and the disc A5 is made of metal or quartz glass. When used for measuring the temperature of the outer surface of the disc, the disc B13 and the disc A5 can be selected from quartz glass and metal. In order to observe the overall pressure and temperature distribution of the gas film side wall surface, only the optical measurement method can be used, which requires that one of the discs can transmit light. Since the side of the disc B13 is not interfered by the gas supply pipeline, it is convenient to arrange the excitation light source and the observation camera, so the material of the disc B13 is selected as quartz glass, and the disc A5 is made of metal or quartz glass. When measuring the temperature distribution of the outer surface of the disc, an infrared camera is used, and there is no requirement for the light transmission of the material. Therefore, the materials of the disc B13 and the disc A5 can be selected from quartz glass and metal.

[0028] A method for using a single-sided gas supply high-pressure disc gas bearing, specifically comprising the following steps: the external high-pressure gas flow is divided into two paths, one path enters the high-pressure outer gas chamber inner cavity 1006 through the gas supply hole of the high-pressure outer gas chamber 10, and then enters the annular channel between the inner sleeve outer cylindrical surface and the internal cylindrical hole of the positioning mandrel, and flows along the annular channel from left to right into the radial gas supply groove 10207; the other path enters the high-pressure inner gas chamber inner cavity 905 through the gas supply hole of the high-pressure inner gas chamber 9, and then enters the inner hole of the inner sleeve 7, flows from the left end of the inner sleeve 7 to the right, and then flows out from the circular hole or key groove hole 701 at the right end of the inner sleeve, enters the annular channel between the internal cylindrical hole of the right shaft section of the positioning mandrel and the outer cylindrical surface of the inner sleeve, and flows from right to left into the radial gas supply groove 10207, the two gas flows converge in the radial gas supply groove 10207, are rectified by the middle shaft section contraction section of the positioning mandrel, are rectified again by the double-symmetrical contraction section between the disc A5 and the disc B13, become subsonic high-pressure gas flow with uniform speed and stable flow, and then enter the parallel gap between the two discs, and finally flow out from the disc gap outlet at supersonic speed to avoid the influence of the downstream low pressure on the upstream pressure distribution, so that the bearing capacity of the disc gas bearing increases linearly with the increase of the gas supply pressure.

[0029] Compared with the prior art, the application has the following characteristics and beneficial effects:

[0030] (1) The positioning spindle is designed to integrate the positioning and air supply functions. The two back-to-back outer cone surfaces on the positioning spindle are precisely machined to achieve high coaxiality accuracy of the two outer cone surfaces. Then, in cooperation with the two discs with machined inner cone surfaces, accurate positioning of the two discs is achieved. Two high-pressure air streams converge into several radially symmetric radial air supply grooves in the middle shaft section of the positioning spindle through the annular air flow channel between the cylindrical hole of the positioning spindle and the outer cylindrical surface of the inner sleeve. Then, the air streams enter the gap between the two discs from the radial air supply grooves to form a high-pressure lubricating air film. The positioning and air supply functions of the positioning spindle are integrated. The positioning spindle has compact structure, sufficient rigidity and strength, and simple and reliable assembly, greatly simplifying the installation and debugging process of the bearing;

[0031] (2) The entire assembly is simple to manufacture. The middle shaft section can be manufactured using 3D metal printing technology. After the middle shaft section is welded with the left and right shaft sections at the end face to form a whole, the precise machining of the positioning surface is performed. This overcomes the problem that in the traditional subtractive manufacturing process, the cutting tool cannot enter the radial air supply groove to machine the curved wall type;

[0032] (3) The two high-pressure pipelines for supplying air to the high-pressure inner and outer air chambers are arranged on the same side of a working disc, achieving single-sided air inlet of the high-pressure disc gas bearing. The external high-pressure inlet pipe is eliminated when air is supplied from both sides, which facilitates the arrangement and installation of test instruments, improves measurement accuracy, and ensures the effectiveness of experimental tests;

[0033] (4) The taper surface positioning plus round nut and stop washer anti-loose fastening structure is adopted. This not only ensures the accurate positioning and fastening of the two discs, but also allows flexible replacement of discs made of different materials or discs with different diameters according to the needs of experimental projects, saving experimental costs and improving experimental efficiency. After the discs are assembled on a positioning spindle of a specific size, the gap between the two discs remains fixed, and the velocity field and temperature field of the bearing gap flow passage under a certain gap height working condition can be accurately measured;

[0034] (5) By changing the width of the cylindrical section between the two large head back-to-back outer cone surfaces of the positioning spindle, the actual working air film gap height of the high-pressure disc gas bearing can be changed. Therefore, after machining multiple positioning spindles with different cylindrical section widths, various air film gap height working conditions can be tested and analyzed, which helps to reduce the complexity and cost of the bearing experimental device and improve experimental efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 FIG. 1 is a schematic diagram of the overall structure of the single-sided air inlet taper positioning high-pressure disc gas bearing in the embodiment;

[0036] Figure 2for Figure 1 An enlarged view of part I in the overall structural schematic diagram;

[0037] Figure 3a This is the left view of disk B. Figure 3b This is a main sectional view of disk B. Figure 3c for Figure 3b Enlarged schematic diagram of part II in the middle;

[0038] Figure 4a This is the left view of disk A. Figure 4b This is a main sectional view of disk A. Figure 4c for Figure 4b Enlarged schematic diagram of part III in the middle;

[0039] Figure 5a This is a schematic diagram of the overall structure of the positioning mandrel. Figure 5b This is a schematic diagram of the left axis segment; Figure 5c , Figure 5d These are the main sectional view and the side sectional view of the central axis section, respectively; Figure 5e This is a schematic diagram of the right axis segment;

[0040] Figure 6 This is a schematic diagram of the high-pressure internal air chamber in the embodiment;

[0041] Figure 7 This is a schematic diagram of the high-pressure external air chamber in the embodiment;

[0042] Figure 8 This is a schematic diagram of the inner sleeve and sealing packing in the embodiment;

[0043] Figure 9a This is a three-dimensional schematic diagram of half of the central axis section. Figure 9b This is a complete three-dimensional schematic diagram of the central axis segment.

[0044] Figure: 1-positioning mandrel, 2, round nut B; 3-stop washer B, 4-sealing packing, 5-disc A, 6-stop washer A, 7-inner sleeve, 8-sleeve straight pipe joint, 9-high pressure inner air chamber, 10-high pressure outer air chamber, 11-round nut A, 12-O-shaped sealing ring, 13-disc B; 101-right shaft section, 102-middle shaft section, 103-left shaft section, 104-end face weld B, 105-end face weld A; 501-contracting profile A, 1301-contracting profile B, 10201-contracting profile C, 502-inner tapered hole A, 1306-inner tapered hole B, 503-flat square A, 1303-flat square B, 504-disc flat section A, 1302-disc flat section B, 505-sealing groove A, 1304-sealing groove B, 506-cylindrical hole A, 1305-cylindrical hole B; 701-round hole or key groove hole; 901-pairing pipe inner thread A, 1001-pairing pipe outer thread A, 902-gas supply pipe thread A, 1002-gas supply pipe thread B, 903-flat square C, 1003-flat square D, 904-flange mounting hole, 905-high pressure inner air chamber inner cavity, 906-flange; 1004-fine inner thread, 1005-pairing pipe inner thread B, 10305-pairing pipe outer thread B, 1006-high pressure outer air chamber inner cavity, 1007-groove; 10101-fine outer thread B, 10301-fine outer thread A, 10102-inner cylindrical hole of positioning mandrel right shaft section, 10204-inner cylindrical hole of positioning mandrel middle shaft section, 10304-inner cylindrical hole of positioning mandrel left shaft section, 10103-blind hole, 10104-flat square E, 10105-welded end face of positioning mandrel right shaft section, 10303-welded end face of positioning mandrel left shaft section, 10106-outer tapered surface B1 matched with inner tapered hole of disc B, 10206-outer tapered surface B2 matched with inner tapered hole of disc B, 10107-outer cylindrical surface of positioning mandrel right shaft section, 10306-outer cylindrical surface of positioning mandrel left shaft section; 10302-outer tapered surface A1 matched with inner tapered hole of disc A, 10202-outer tapered surface A2 matched with inner tapered hole of disc A, 10203-welded end face B of middle shaft section, 10205-welded end face A of middle shaft section, 10207-radiating gas supply groove, 10208-cylindrical surface of positioning mandrel middle shaft section. DETAILED DESCRIPTION

[0045] The technical solutions of the present application will be further specifically explained below by examples in combination with the drawings, such as Figure 1As shown, a single-sided air inlet conical surface positioning high-pressure disc gas bearing includes a positioning mandrel 1 and a disc assembly sleeved on the shaft section of the positioning mandrel 1, the positioning mandrel 1 is formed by welding a left shaft section, a middle shaft section and a right shaft section, the left shaft section of the positioning mandrel 1 is connected with a high-pressure outer air chamber 10 and a high-pressure inner air chamber 9 in sequence, the positioning mandrel 1 is provided with a left-through positioning mandrel inner cylindrical hole, the inner cylindrical hole is provided with an inner sleeve 7, the left end of the inner sleeve 7 extends out of the positioning mandrel and penetrates through the high-pressure outer air chamber 10, and the end is arranged in the high-pressure inner air chamber 9.

[0046] The disc assembly includes a disc A 5 and a disc B 13, the disc A 5 is fixed on the positioning mandrel 1 through a stop washer A 6 and a round nut A 11, and the disc B 13 is fixed on the positioning mandrel 1 through a stop washer B 3 and a round nut B 2; the disc A 5 and the disc B 13 are respectively designed with positioning inner conical surfaces, the two positioning inner conical surfaces have the same taper and are arranged symmetrically along the positioning mandrel left and right; the outer periphery of the positioning mandrel is designed with two positioning outer conical surfaces matched with the positioning inner conical surfaces; after the disc A 5 and the disc B 13 are assembled on the positioning mandrel, the automatic centering effect of the conical surface matching makes the two discs coaxial, the linear section air film end faces are parallel to each other, and the air film end faces of the disc A and the disc B form an air film gap.

[0047] As shown in the figure, Figures 4a-4c The center of the disc A 5 is provided with an inner conical hole A 502, a sealing groove A 505 and a cylindrical hole A 506 in sequence, the inner conical hole A 502 is matched with the corresponding outer conical surface of the positioning mandrel 1, the sealing groove A 505 is used for leaving a tool feed position during machining and forms a sealing space with the outer cylindrical surface of the middle part of the left shaft section of the positioning mandrel, the sealing space is provided with an O-shaped sealing ring 12 inside, so as to ensure that the high-pressure air flowing through the disc gap flow channel does not leak from the conical surface matching gap, the air film end face of the disc A 5 is provided with a locally contracted profile A 501 in a curved surface shape, one end of the profile A 501 is tangent to the parallel end face A 504 of the disc A 5, and the other end is connected with a contraction profile C 10201 in a radial gas supply groove of the middle shaft section of the positioning mandrel 1 to form a complete contraction section profile.

[0048] As shown in the figure, Figures 3a-3c The disc B 13 has the same structure as the disc A 5 and is arranged symmetrically with the disc A 5 along the positioning mandrel 1.

[0049] As shown in the figure, Figure 5bAs shown, the outer periphery of the left shaft segment 103 of the positioning mandrel is sequentially but discontinuously provided with a mating pipe external thread B10305, a fine tooth external thread A10301, an outer cylindrical surface 10306 of the left shaft segment of the positioning mandrel and an outer tapered surface A110302 matched with the inner tapered hole of the disc A5, and the inside is provided with a central through hole, i.e. the inner cylindrical hole 10304 of the left shaft segment of the positioning mandrel; the mating pipe external thread B10305 is matched and connected with the high-pressure external air chamber 10, the fine tooth external thread A10301 is connected with the stop washer A6 and the circular nut A11, which has the effect of making the disc A5 and the positioning mandrel 1 firmly matched and preventing loosening, the outer cylindrical surface 10306 of the left shaft segment of the positioning mandrel forms a sealed space with the sealing groove of the disc A5 to install the O-shaped sealing ring 12, and the small head of the outer tapered surface of the left shaft segment is on the left and the large head is on the right; the inner sleeve 7 is placed in the central through hole.

[0050] As shown in Figure 5c , the middle shaft segment of the positioning mandrel is left-right symmetrical, and the outer periphery is sequentially and continuously provided with an outer tapered surface A210202 matched with the inner tapered hole of the disc A, a cylindrical surface 10208 of the middle shaft segment of the positioning mandrel and an outer tapered surface B210206 matched with the inner tapered hole of the disc B; the outer tapered surface A210202 matched with the inner tapered hole of the disc A has a small head on the left and a large head on the right, and forms a complete left outer tapered surface with the outer tapered surface A110302 on the left shaft segment matched with the inner tapered hole of the disc A, which is matched with the inner tapered hole of the disc A5 to accurately position the disc A5 on the positioning mandrel; the outer tapered surface B210206 matched with the inner tapered hole of the disc B on the middle shaft segment has a large head on the left and a small head on the right, and forms a complete right outer tapered surface with the outer tapered surface B110106 on the right shaft segment matched with the inner tapered hole of the disc B, which is matched with the inner tapered hole of the disc B to accurately position the disc B on the positioning mandrel, and the central axis of the middle shaft segment of the positioning mandrel is provided with a cylindrical through hole with the same diameter as the central through hole of the left shaft segment, and the central radial direction of the middle shaft segment of the positioning mandrel is provided with a plurality of symmetrically arranged radial gas supply grooves 10207, which are provided with left-right symmetrical curved surface modeling contraction lines C10201, one end of the contraction line is tangent to the cylindrical through hole inside the middle shaft segment, and the other end is connected with the local contraction line of the disc A5 and the disc B13 to form a complete contraction segment line, as shown in the partial enlargement Figure 2 in Figure I , to adjust and accelerate the high-pressure gas flow in the gap flow channel.

[0051] As shown in Figure 5eAs shown, the outer periphery of the right shaft segment of the positioning mandrel is provided with an outer tapered surface B110106 matched with the inner tapered hole of the disc B, an outer cylindrical surface 10107 of the right shaft segment of the positioning mandrel, a fine tooth outer thread B10101 and a flat square E10104 in sequence and discontinuously, and is internally provided with a cylindrical hole with the same diameter as the central through hole of the left shaft segment of the positioning mandrel, i.e. an inner cylindrical hole 10102 of the right shaft segment of the positioning mandrel, and a blind hole 10103 with the same outer diameter as the inner sleeve 7, the diameter of which is smaller than that of the inner cylindrical hole 10102 of the right shaft segment of the positioning mandrel; the small end of the outer tapered surface B110106 matched with the inner tapered hole of the disc B is on the right, and the large end is on the left; the outer cylindrical surface 10107 of the right shaft segment of the positioning mandrel forms a sealing space with the sealing groove B1304 of the disc B13, for placing an O-shaped sealing ring; the fine tooth outer thread B10101 is connected with the stop washer B3 and the circular nut B2, achieving the effect of firm cooperation and anti-loosening of the disc B13 and the positioning mandrel, and the inner cylindrical hole 10102 of the right shaft segment of the positioning mandrel is connected with the inner cylindrical hole 10204 of the middle shaft segment of the positioning mandrel and the inner cylindrical hole 10304 of the left shaft segment of the positioning mandrel to form a complete inner cylindrical hole of the positioning mandrel.

[0052] As shown in the figure, Figure 7 As shown, the outer cylindrical surface of the high-pressure outer gas chamber 10 is provided with an outer threaded hole perpendicular to the axial direction on one side, and the inner wall of the outer threaded hole is provided with a gas pipe thread B1002, which is connected with an external high-pressure pipeline through a pipe joint; the left end of the high-pressure outer gas chamber 10 is internally provided with a fine tooth inner thread 1004, which is connected with the outer screw plug of the sleeve type straight pipe joint 8; the right end surface of the high-pressure outer gas chamber 10 is provided with a matched pipe inner thread B1005, which is connected with the matched pipe outer thread B10305 of the left end of the positioning mandrel, and the left end of the outer periphery of the high-pressure outer gas chamber 10 is provided with a matched pipe outer thread A1001, which is connected with the high-pressure inner gas chamber 9; the right end of the outer periphery of the high-pressure outer gas chamber 10 is provided with a flat square D1003, which is convenient for clamping and tightening.

[0053] As shown in the figure, Figure 1 As shown in the figure,

[0054] As shown in the figure, Figure 6As shown, the right end inner wall of the high-pressure inner plenum 9 is provided with a mating pipe internal thread A901, which is connected with the high-pressure outer plenum 10; the left end inner wall of the high-pressure inner plenum 9 is provided with a gas supply pipe thread A902, which is connected with another external high-pressure pipeline through a pipe joint; a flange plate 906 and six flange mounting holes 904 are provided at the left end of the high-pressure inner plenum 9, which facilitates the fixation of the entire bearing assembly to the experimental support. The internal space of the high-pressure inner plenum 9 accommodates the left end of the entire sleeve type straight-through pipe joint 8 and the inner sleeve 7, and the high-pressure inner plenum 9 forms a closed chamber with gas inlet and outlet. High-pressure gas enters the chamber from the thread hole at the left end of the high-pressure inner plenum 9, and then enters the inner sleeve from the left end of the inner sleeve, and flows out of the high-pressure inner plenum.

[0055] As shown in Figure 8 , the inner sleeve 7 is a thin-walled stainless steel pipe, the right end of which is sealed with sealing packing 4, and symmetric circular holes or key groove holes 701 are machined on the inner sleeve 7 wall surface near the sealing packing; the right end of the inner sleeve 7 extends into the blind hole 10103 inside the positioning mandrel right shaft section, achieving positioning of the right end of the inner sleeve; the left end of the inner sleeve 7 is connected and fixed with the sleeve type straight-through pipe joint 8, and the left end surface of the inner sleeve 7 extends into the high-pressure inner plenum 9, and the inner sleeve communicates with the internal space of the high-pressure inner plenum 9.

[0056] As shown in Figure 1 and Figure 2 , the outer cylindrical surface of the inner sleeve 7 forms an annular gas flow channel with the internal cylindrical hole of the positioning mandrel, the left end of the inner sleeve communicates with the high-pressure inner plenum 9, and the inner sleeve 7 is installed at the axial center of the internal cylindrical hole of the positioning mandrel, and the two are coaxially arranged. One stream of high-pressure gas enters the inner hole of the inner sleeve 7 from the high-pressure inner plenum 9, flows along the inner hole of the inner sleeve 7 from the left end to the right end, and then flows out of the circular hole or key groove hole 701 at the right end of the inner sleeve 7, entering the annular gas flow channel between the outer cylindrical surface of the inner sleeve and the internal cylindrical hole of the positioning mandrel, flowing from right to left; another stream of high-pressure gas enters the annular gas flow channel from the high-pressure outer plenum 10 and flows from left to right; after the two streams of gas converge, they enter the radial gas supply grooves 10207 inside the middle shaft section of the positioning mandrel, and then enter the gap between the disc A and the disc B, forming a high-pressure lubricating gas film.

[0057] As shown in Figure 2 , the wall type curve of the disc A 5 and the disc B 13 rotates one circle around the center axis of the positioning mandrel, forming a double-symmetry contraction section, smoothly accelerating the gas flow from the radial gas supply grooves 10207 into the disc gap, and flowing out of the parallel gas film gap outlet at supersonic speed.

[0058] As shown in Figures 9a-9bAs shown, the left and right convergent segment profiles in the plane of symmetry of the radial gas supply groove 10207 are composed of three arc lines connected two by two and tangent to each other. One of the arc lines near the inner cylindrical hole of the positioning mandrel is tangent to the cylindrical hole, and the arc line near the outer conical surface of the positioning mandrel has the same curve equation as the curved wall profile of the disc.

[0059] The width of the cylindrical portion between the left and right outer conical surfaces of the positioning mandrel 1 determines the gap height between the two discs. If the experimental study of high-pressure disc gas bearings under different gas film gap heights is to be conducted, positioning mandrels with different cylindrical portion widths need to be designed.

[0060] The cross-sectional area of the annular gas flow passage between the inner cylindrical hole of the positioning mandrel 1 and the outer cylindrical surface of the inner sleeve 7 should be equal to the area of the gas flow passage formed by the inner hole of the inner sleeve, so that the mass flow rates of the two high-pressure gas flows are the same.

[0061] A flat square, i.e., flat square C903 and flat square D1003, is arranged on the outer periphery of the high-pressure inner gas chamber 9 and the high-pressure outer gas chamber 10. A flat square E10104 is arranged on the right end of the right shaft section of the positioning mandrel. A flat square, i.e., flat square A503 and flat square B1303, is arranged on the small diameter section of each disc.

[0062] The materials of disc B13 and disc A5 are selected according to different experimental purposes. When used for measuring the pressure and temperature of the disc gas film side wall surface, the material of disc B13 is quartz glass, and disc A5 is made of metal or quartz glass. When used for measuring the temperature of the disc outer surface, disc B13 and disc A5 are arbitrarily selected from quartz glass and metal. To observe the overall pressure and temperature distribution of the gas film side wall surface, an optical measurement method must be used, which requires that one of the discs be transparent. Since there is no gas supply pipeline interference on the side of disc B13, it is convenient to arrange the light source and observation camera, so the material of disc B13 is selected as quartz glass, and disc A5 is made of metal or quartz glass. When measuring the temperature distribution of the disc outer surface, an infrared camera is used, and there is no requirement for the light transmission of the material. Therefore, the materials of disc B13 and disc A5 can be arbitrarily selected from quartz glass and metal according to different experimental purposes.

[0063] The method for using the single-sided air inlet high-pressure disc gas bearing comprises the following steps: the external high-pressure airflow is divided into two paths, one path enters the high-pressure outer air chamber through the air supply hole of the high-pressure outer air chamber 10, then enters the annular channel between the inner cylindrical surface of the positioning mandrel and the outer cylindrical surface of the inner sleeve, and flows along the annular channel from left to right into the radial air supply groove 10207; the other path enters the high-pressure inner air chamber 905 through the air supply hole of the high-pressure inner air chamber 9, then enters the inner hole of the inner sleeve 7, flows from the left end of the inner sleeve 7 to the right, and then flows out from the circular hole or key groove hole 701 at the right end of the inner sleeve, enters the annular channel between the inner cylindrical surface of the positioning mandrel and the outer cylindrical surface of the inner sleeve, and flows from right to left into the radial air supply groove 10207, the two airflows converge in the radial air supply groove 10207, are rectified by the middle shaft section of the positioning mandrel, are rectified again by the double-symmetrical contraction section between the disc A5 and the disc B13, become subsonic high-pressure airflows with uniform speed and stable flow, then enter the parallel gap between the two discs, and finally flow out from the disc gap outlet at supersonic speed to avoid the influence of the downstream low pressure on the upstream pressure distribution, so that the bearing capacity of the disc gas bearing increases linearly with the increase of the air supply pressure.

[0064] The scope of protection of the present application is not limited to the above-mentioned embodiments, and it is obvious that those skilled in the art can make various modifications and changes to the present application without departing from the scope and spirit of the present application. If these modifications and changes belong to the scope of the claims of the present application and equivalent technologies, the intention of the present application also includes these modifications and changes.

Claims

1. A conical face located high pressure disc gas bearing with single sided gas supply, comprising a locating spindle (1) and a disc assembly sleeved on the locating spindle (1), characterized in that: The positioning mandrel (1) comprises a left shaft section, a middle shaft section and a right shaft section, the positioning mandrel (1) left shaft section is sequentially connected with a high-pressure outer air chamber (10) and a high-pressure inner air chamber (9) from outside, the high-pressure outer air chamber (10) and the high-pressure inner air chamber (9) are respectively provided with an external connecting hole in communication with an external high-pressure pipeline, the positioning mandrel (1) is internally provided with a left-through positioning mandrel internal cylindrical hole, the positioning mandrel internal cylindrical hole is internally provided with an inner sleeve (7), the left side of the high-pressure outer air chamber (10) inner cavity is sealed by a clamping sleeve type straight-through pipe joint (8), the inner sleeve (7) left end extends out of the positioning mandrel part, and the tail end is arranged in the high-pressure inner air chamber (9) inside, the inner sleeve pipe inner passage is communicated with the high-pressure inner air chamber (9), and the inner sleeve (7) right end wall is provided with symmetrical circular holes or key groove holes (701), the outer cylindrical surface of the inner sleeve (7) and the positioning mandrel internal cylindrical hole form an annular airflow passage; The disc assembly comprises a disc A (5) and a disc B (13), the disc A (5) and the disc B (13) are respectively designed with a positioning inner conical surface, the two positioning inner conical surfaces are symmetrically arranged along the positioning mandrel left and right; the positioning mandrel outer periphery is designed with two positioning outer conical surfaces matched with the positioning inner conical surfaces.

2. A conical surface located high pressure disc gas bearing with single sided gas supply as claimed in claim 1 characterized by: The disc A (5) is fixed on the positioning mandrel (1) through a stop washer A (6) and a circular nut A (11), the disc B (13) is fixed on the positioning mandrel (1) through a stop washer B (3) and a circular nut B (2); the disc A (5) center is sequentially provided with an inner conical hole A (502), a sealing groove A (505) and a cylindrical hole A (506), the inner conical hole A (502) is matched with the corresponding outer conical surface on the positioning mandrel (1), an O-shaped sealing ring (12) is arranged in the sealing space, the gas film end face of the disc A (5) is provided with a locally contracted profile A (501) of curved surface modeling and a straight line segment parallel to the disc B (13), one end of the contracted profile A (501) is tangent to the parallel end face A (504) of the disc A (5), and the other end is connected with a contracted profile C (10201) in a radial gas supply groove in the middle shaft section of the positioning mandrel (1) to form a complete contracted section profile; the disc B (13) has the same structure as the disc A (5), and is symmetrically arranged along the positioning mandrel (1) with the disc A (5); the middle shaft section of the positioning mandrel is radially provided with a plurality of symmetrically arranged radial gas supply grooves (10207), the gas supply grooves are provided with left and right symmetrically curved surface modeling contracted profiles C (10201), one end of the contracted profile is tangent to the cylindrical through hole in the middle shaft section, and the other end is connected with the local contracted profile of the disc A (5) and the disc B (13) to form a complete contracted section profile; The wall type curve of the disc A (5) and the disc B (13) rotates one circle around the center axis of the positioning mandrel to form a double-symmetrical contraction section, the airflow of the radial gas supply groove (10207) entering the disc gap is smoothly accelerated, and flows out from the parallel gas film gap outlet at supersonic speed.

3. A conical surface located high pressure disc gas bearing with single sided gas supply as claimed in claim 1 wherein: The outer periphery of the positioning spindle left shaft section (103) is provided with, in sequence but not continuously, a mating pipe external thread B (10305), a fine tooth external thread A (10301), an outer cylindrical surface (10306) of the positioning spindle left shaft section, and an outer tapered surface A1 (10302) matched with the inner tapered hole of disc A (5), and internally provided with a central through hole, i.e. an inner cylindrical hole (10304) of the positioning spindle left shaft section; the mating pipe external thread B (10305) is matched and connected with the high pressure external air chamber (10), the fine tooth external thread A (10301) is connected with the stop washer A (6) and the circular nut A (11), the outer cylindrical surface (10306) of the positioning spindle left shaft section forms a sealed space with the sealing groove of disc A (5) to install the O-shaped sealing ring (12), the small head of the outer tapered surface of the positioning spindle left shaft section is on the left and the large head is on the right; the inner sleeve (7) is placed in the central through hole.

4. A conical surface located high pressure disc gas bearing with single sided gas supply as claimed in claim 1 characterized by: The positioning spindle middle shaft section is left-right symmetrical, and the outer periphery is provided, in sequence and continuously, with an outer tapered surface A2 (10202) matched with the inner tapered hole of disc A, a cylindrical surface (10208) of the positioning spindle middle shaft section, and an outer tapered surface B2 (10206) matched with the inner tapered hole of disc B; the outer tapered surface A2 (10202) matched with the inner tapered hole of disc A has a small head on the left and a large head on the right, and forms a complete left outer tapered surface with the outer tapered surface A1 (10302) on the left shaft section matched with the inner tapered hole of disc A, which is matched with the inner tapered hole of disc A (5) to accurately position disc A (5) on the positioning spindle; the outer tapered surface B2 (10206) on the middle shaft section matched with the inner tapered hole of disc B has a large head on the left and a small head on the right, and forms a complete right outer tapered surface with the outer tapered surface B1 (10106) on the right shaft section matched with the inner tapered hole of disc B, which is matched with the inner tapered hole of disc B to accurately position disc B on the spindle positioning spindle, and the central axis of the positioning spindle middle shaft section is provided with a cylindrical through hole with the same diameter as the central through hole of the left shaft section, and the central radial direction of the positioning spindle middle shaft section is provided with a plurality of symmetrically arranged radial gas supply grooves (10207), which are provided with left-right symmetrical curved surface modeling contraction lines C (10201), one end of the contraction line is tangent to the cylindrical through hole inside the middle shaft section, and the other end is connected with the local contraction line of disc A (5) and disc B (13) to form a complete contraction section line, which is used to adjust and accelerate the high pressure gas flow in the gap flow channel, and the left and right contraction section lines in the radial gas supply grooves (10207) are composed of three arc lines connected and tangent to each other in pairs, one of the arc lines in the arc line close to the cylindrical hole of the positioning spindle is tangent to the cylindrical hole, and the arc line close to the tapered surface of the positioning spindle has the same curve equation as the curved wall of the disc.

5. A conical surface located high pressure disc gas bearing with single sided gas supply as claimed in claim 1 characterized in that: The outer periphery of the positioning mandrel right axis section is sequentially discontinuously provided with an outer taper surface B1 (10106) matched with the inner taper hole of the disc B, an outer cylindrical surface (10107) of the positioning mandrel right axis section, a fine tooth outer thread B (10101), and a flat square E (10104), and is internally provided with a cylindrical hole with the same diameter as the central through hole of the positioning mandrel left axis section, i.e. an inner cylindrical hole (10102) of the positioning mandrel right axis section, and a blind hole (10103) with the same outer diameter as the inner sleeve (7), the diameter of the blind hole being smaller than that of the inner cylindrical hole (10102) of the positioning mandrel right axis section; the small head of the outer taper surface B1 (10106) matched with the inner taper hole of the disc B is on the right, and the large head is on the left; the outer cylindrical surface (10107) of the positioning mandrel right axis section forms a sealing space with the sealing groove B (1304) of the disc B (13) to place the O-shaped sealing ring; the fine tooth outer thread B (10101) is connected with the stop washer B (3) and the circular nut B (2), and the inner cylindrical hole (10102) of the positioning mandrel right axis section is connected with the inner cylindrical hole (10204) of the positioning mandrel middle axis section and the inner cylindrical hole (10304) of the positioning mandrel left axis section to form a complete inner cylindrical hole of the positioning mandrel.

6. A conical surface located high pressure disc gas bearing with single sided gas supply as claimed in claim 1 wherein: The outer cylindrical surface of the high-pressure outer gas chamber (10) is provided with an outer thread hole perpendicular to the axial direction on one side, and the inner wall of the outer thread hole is provided with a gas supply pipe thread B (1002), which is connected with an external high-pressure pipeline through a pipe joint; the left end of the high-pressure outer gas chamber (10) is internally provided with a fine tooth inner thread (1004) matched with the outer screw plug of the clamping sleeve type straight pipe joint (8); the right end surface of the high-pressure outer gas chamber (10) is provided with a matched pipe inner thread B (1005) matched with the matched pipe outer thread B (10305) of the left end of the positioning mandrel, and the left end of the outer periphery of the high-pressure outer gas chamber (10) is provided with a matched pipe outer thread A (1001) matched with the high-pressure inner gas chamber (9); the right end of the outer periphery of the high-pressure outer gas chamber (10) is provided with a flat square D (1003) for convenient clamping and tightening; The clamping sleeve type straight pipe joint (8) is a standard part, the inner screw plug and the conical accessory tightly hold the outer cylindrical surface of the inner sleeve (7), realize the isolation and sealing between the outer gas chamber and the inner gas chamber, and make the high-pressure outer gas chamber (10) form a closed chamber with gas inlet and outlet, and the high-pressure gas enters from the thread hole of the outer cylindrical surface and flows out from the annular channel between the cylindrical hole of the positioning mandrel and the inner sleeve.

7. A conical surface located high pressure disc gas bearing with single sided gas supply as claimed in claim 1 wherein: The right end inner wall of the high-pressure inner gas chamber (9) is provided with a mating pipe internal thread A (901) for connecting with the high-pressure outer gas chamber (10); the left end inner wall of the high-pressure inner gas chamber (9) is provided with a gas supply pipe thread A (902) for connecting with another external high-pressure pipeline through a pipe joint; a flange plate (906) and six flange mounting holes (904) are arranged at the left end of the high-pressure inner gas chamber (9) for facilitating fixation of the entire bearing assembly to an experimental support; the internal space of the high-pressure inner gas chamber (9) accommodates the left end of the entire sleeve type straight-through pipe joint (8) and the inner sleeve (7); the high-pressure inner gas chamber (9) forms a closed chamber with a gas inlet and an outlet; high-pressure gas enters the chamber from the thread hole at the left end of the high-pressure inner gas chamber (9) and then enters the inner sleeve from the left end of the inner sleeve and flows out of the high-pressure inner gas chamber.

8. A conical surface located high pressure disc gas bearing with single sided gas supply as claimed in claim 1 wherein: The main body of the inner sleeve (7) is a thin-walled stainless steel pipeline, the right end of which is sealed with sealing filler (4), and symmetric circular holes or key groove holes (701) are processed on the inner sleeve (7) wall surface close to the sealing portion; the right end of the inner sleeve (7) extends into the blind hole (10103) inside the right shaft section of the positioning mandrel to realize positioning of the right end of the inner sleeve; the left end of the inner sleeve (7) is connected with and fixed to the sleeve type straight-through pipe joint (8), and the left end surface of the inner sleeve (7) extends into the high-pressure inner gas chamber (9) and is in communication with the internal space of the high-pressure inner gas chamber (9); The flow area of the annular gas flow passage between the internal cylindrical hole of the positioning mandrel (1) and the outer cylindrical surface of the inner sleeve (7) should be equal to the area of the gas flow passage formed by the inner hole of the inner sleeve, so that the mass flow rates of the two high-pressure gas flows are the same.

9. A conical surface located high pressure disc gas bearing with single sided gas supply as claimed in claim 1 characterized by: The materials of the disc B (13) and the disc A (5) are selected according to different experimental purposes; when used for measuring the pressure and temperature of the side wall surface of the gas film, the material of the disc B (13) is quartz glass, and the disc A (5) is made of metal or quartz glass; when used for measuring the temperature of the outer surface of the disc, the disc B (13) and the disc A (5) are selected from quartz glass and metal.

10. A method of using a conical location high pressure disc gas bearing with single sided gas supply as claimed in any one of claims 1 to 9, characterized in that: Specifically comprising the following steps: the external high-pressure gas flow is divided into two paths, one path enters the high-pressure outer air chamber inner cavity (1006) through the gas supply hole of the high-pressure outer air chamber (10), and then enters the annular channel between the positioning mandrel inner cylindrical hole and the inner sleeve outer cylindrical surface, and flows along the annular channel from left to right into the radial gas supply groove (10207); the other path enters the high-pressure inner air chamber inner cavity (905) through the gas supply hole of the high-pressure inner air chamber (9), and then enters the inner hole of the inner sleeve (7), flows from the left end of the inner sleeve (7) to the right, and then flows out from the round hole or key groove hole (701) at the right end of the inner sleeve, enters the annular channel between the positioning mandrel right shaft section inner cylindrical hole and the inner sleeve outer cylindrical surface, and flows from right to left into the radial gas supply groove (10207); the two gas flows converge in the radial gas supply groove (10207), are rectified by the middle shaft section contraction section of the positioning mandrel, are rectified again by the double-symmetrical contraction section between the disc A (5) and the disc B (13), become subsonic high-pressure gas flow with uniform speed and stable flow, and then enter the parallel gap between the two discs, and finally flow out from the disc gap outlet at supersonic speed to avoid the influence of the downstream low pressure on the upstream pressure distribution, and realize the linear increase of the load capacity of the disc gas bearing with the increase of the gas supply pressure.

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