Coaxial air pressure transmission device for large-diameter high-speed rotating shaft

Abstract

The coaxial air pressure transmission device comprises a fixed support, a rotating disc and a plurality of first air channels, the rotating disc is used for being fixedly connected with the rotating shaft, the rotating disc is provided with a plurality of containing cavities and a plurality of first air channels which are in one-to-one correspondence with the containing cavities and communicate with the containing cavities, and the first air channels are located on the same side of the rotating disc; the air pressure distribution disc is connected with the fixed support, the air pressure distribution disc and the rotating disc are sequentially arranged in the first direction, the first direction is the axial direction of the rotating shaft, a plurality of second air channels are formed in the side, facing the rotating disc, of the air pressure distribution disc, and the second air channels correspond to the first air channels one to one. According to the coaxial air pressure transmission device, air is transmitted to the rotating disc of the large-diameter high-speed rotating shaft, so that equilibrium liquid in different cavities is redistributed, and unbalanced vibration of equipment is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of steam turbine generators, and in particular to a coaxial air pressure transmission device for a large-diameter high-speed rotating shaft. Background Art

[0002] As the main unit for centralized power supply, steam turbine generator sets are typical high-speed rotating machines. With the continuous growth of energy demand and the increase of unit capacity, the unbalanced vibration that is very easy to occur in steam turbine generator sets has become an important factor affecting its operational reliability and stability. Self-healing control technology can suppress the vibration of rotating machinery without stopping the machine, and is an effective measure to adjust the balance of the rotating shaft of rotating equipment and reduce the unbalanced vibration of equipment.

[0003] For the pneumatic hydraulic actuator in the self-healing control system, the balancing fluid in different chambers of the rotating disk is generally redistributed to offset the unbalanced vibration of the unit by synthesizing the unbalanced compensation vector. However, for a large-diameter, high-speed rotating shaft, the gas is not easy to be transmitted during the rotation of the rotating disk, so it is impossible to redistribute the balancing fluid in different chambers. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a coaxial gas pressure transmission device for a large-diameter high-speed rotating shaft, which transmits gas to a rotating disk of the large-diameter high-speed rotating shaft to redistribute the balancing liquid in different chambers, thereby reducing the unbalanced vibration of the equipment.

[0005] The embodiment of the present application provides a coaxial air pressure transmission device for a large-diameter high-speed rotating shaft, comprising: Fixed bracket; A rotating disk, used for being fixedly connected to the rotating shaft, the rotating disk is provided with a plurality of accommodating cavities, and a plurality of first air passages corresponding to and communicating with the plurality of accommodating cavities one by one, and the plurality of first air passages are located on the same side of the rotating disk; An air pressure distribution plate is connected to the fixed bracket and is arranged in sequence with the rotating plate along a first direction, the first direction being the axial direction of the rotating shaft. A plurality of second air ducts are provided on one side of the air pressure distribution plate facing the rotating plate, and the plurality of second air ducts correspond one-to-one to the plurality of first air ducts.

[0006] According to the coaxial air pressure transmission device for a large-diameter high-speed rotating shaft according to the embodiment of the present application, a rotating disk fixedly connected to the rotating shaft is provided to rotate with the rotating shaft. The rotating disk is provided with a plurality of accommodating chambers for containing a balancing liquid, and the balancing liquid is redistributed by adjusting the air pressure in the accommodating chamber, thereby suppressing the vibration of the rotating shaft without stopping the machine. By providing a plurality of first air passages corresponding to the plurality of accommodating chambers on the rotating disk, and providing a plurality of second air passages corresponding to the first air passages on the air pressure rotating disk connected to the fixed bracket, air is supplied to the first air passage through the second air passage to change the air pressure in the corresponding accommodating chamber.

[0007] In a possible implementation of the present application, a plurality of the second air ducts are arranged at radial intervals along the air pressure distribution disk; a plurality of the accommodating cavities are evenly arranged along the circumference of the rotating disk; a plurality of the first air ducts are arranged at circumferential intervals along the rotating disk and at radial intervals along the rotating disk.

[0008] In a possible implementation of the present application, the first air duct includes at least one first groove, in which an air hole is provided; the second air duct includes a plurality of second grooves arranged at circumferential intervals along the air pressure distribution plate, and the opening size of the second groove is the same as the opening size of the first groove.

[0009] In a possible implementation of the present application, one of the air pressure distribution plate and the fixed bracket is provided with a guide rail along a first direction, and the other is provided with a sliding block matched with the guide rail.

[0010] In a possible implementation of the present application, it also includes a composite bearing wheel assembly, which includes a plurality of composite bearings arranged at intervals along the circumference of the air pressure distribution disk and facing the rotating disk, the axial direction of the composite bearing is perpendicular to the first direction, and the composite bearing includes a small bearing and a large bearing that are concentrically assembled.

[0011] In a possible implementation of the present application, the composite bearing wheel assembly also includes an annular bearing frame, the outer periphery of the bearing frame is connected to the air pressure distribution plate, the bearing frame is a channel steel, and the bearing frame is connected to a plurality of core shafts at intervals along the circumferential direction. The core shafts are arranged along the radial direction of the bearing frame, and the composite bearing is installed on the core shafts.

[0012] In a possible implementation of the present application, it further includes a plurality of drive assemblies spaced apart along the circumference of the fixed bracket, and the output ends of the drive assemblies are connected to the air pressure distribution plate.

[0013] In a possible implementation of the present application, it also includes a first side plate and a second side plate, wherein the first side plate and the second side plate are respectively connected to opposite sides of the fixed bracket to enclose an installation cavity, one side of the rotating disk faces the first side plate, and a positioning sleeve is provided on the other side.

[0014] In a possible implementation of the present application, a displacement sensor is provided in the installation cavity for measuring the distance between the rotating disk and the air pressure distribution disk.

[0015] In a possible implementation of the present application, an air source assembly is provided in the installation cavity, the air source assembly is connected to the air intake structure of the air pressure distribution disk to supply air to the air pressure distribution disk, and the air intake structure is connected to the second air duct.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 is a schematic structural diagram of the coaxial air pressure transmission device and the rotating shaft assembly according to an embodiment of the present invention; Figure 2 is a half-section view of the assembly of a coaxial air pressure transmission device and a rotating shaft according to an embodiment of the present invention; Figure 3 yes Figure 2 Partial schematic diagram in; Figure 4 is a schematic structural diagram of an air pressure distribution plate in a coaxial air pressure transmission device according to an embodiment of the present invention; Figure 5 is a schematic structural diagram of one side of a rotating disk in a coaxial air pressure transmission device according to an embodiment of the present invention; Figure 6 is a side view of a rotating disk in a coaxial gas pressure transmission device according to an embodiment of the present invention; Figure 7 yes Figure 6 Middle MM diagram; Figure 8 yes Figure 5 Enlarged view of point N in the middle; Fig. 9 is a schematic structural diagram of a fixed bracket in a coaxial air pressure transmission device according to an embodiment of the present invention; Fig.10 is a schematic structural diagram of a composite bearing wheel assembly in a coaxial air pressure transmission device according to an embodiment of the present invention; Fig.11yes Fig.10 AA diagram of the .

[0018] Reference numerals: Coaxial air pressure transmission device 100, Fixed bracket 10, guide rail 11, displacement sensor 12, air source assembly 13, air source connector 131, positioning sleeve 14, Rotating disk 20, accommodating chamber 21, No. 1 accommodating chamber 21a, No. 2 accommodating chamber 21b, No. 3 accommodating chamber 21c, No. 4 accommodating chamber 21d, first air channel 22, No. 1 first air channel 22a, No. 2 first air channel 22b, No. 3 first air channel 22c, No. 4 first air channel 22d, first groove 221, air hole 222, The air pressure distribution plate 30, the second air channel 31, the first second air channel 31a, the second second air channel 31b, the third second air channel 31c, the fourth second air channel 31d, the second groove 311, the slider 32, Composite bearing wheel assembly 40, composite bearing 41, small bearing 411, large bearing 412, rubber coating 413, bearing frame 42, spindle 421, Driving assembly 50, driving bracket 51, electromagnet 52, push rod 53, The first side plate 60, the second side plate 70, Rotating shaft 200. DETAILED DESCRIPTION

[0019] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0020] In the description of the present invention, it should be understood that the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating positions or positional relationships, are based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] The following describes a coaxial air pressure transmission device 100 for a large-diameter, high-speed rotating shaft according to an embodiment of the present application with reference to the accompanying drawings.

[0022] Reference Figure 1-Figure 7 A coaxial air pressure transmission device 100 for a large-diameter high-speed rotating shaft provided in an embodiment of the present application includes a fixed bracket 10, a rotating disk 20, and the rotating disk 20 is used to be fixedly connected to the rotating shaft 200, the rotating disk 20 is provided with a plurality of accommodating cavities 21, and a plurality of first air passages 22 corresponding one-to-one to and connected with the plurality of accommodating cavities 21, the plurality of first air passages 22 are located on the same side of the rotating disk 20, an air pressure distribution disk 30 is connected to the fixed bracket 10, and is sequentially arranged with the rotating disk 20 along a first direction, the first direction being the axial direction of the rotating shaft 200, a plurality of second air passages 31 are provided on the side of the air pressure distribution disk 30 facing the rotating disk 20, and the plurality of second air passages 31 correspond one-to-one to the plurality of first air passages 22.

[0023] Specifically, refer to Figure 1-Figure 7 The coaxial air pressure transmission device 100 in the embodiment of the present invention includes a fixing bracket 10, which can be fixedly connected to the frame of the steam turbine generator set and is used to provide fixed support. Exemplarily, the fixing bracket 10 is annular and sleeved on the rotating shaft 200.

[0024] The rotating disk 20 is used to be fixedly connected to the rotating shaft 200, and as a moving part, it rotates at high speed with the rotating shaft 200. Exemplarily, the rotating disk 20 and the rotating shaft 200 can be fixed by a threaded connection. The rotating disk 20 is annular so as to be sleeved on the rotating shaft 200. The rotating disk 20 is provided with a plurality of accommodating chambers 21, and the accommodating chambers 21 are used to hold a balancing liquid. Through the distribution of the balancing liquid, the vibration of the rotating shaft 200 can be suppressed without stopping the machine, and the balance of the rotating shaft 200 can be adjusted to reduce the unbalanced vibration of the equipment. Exemplarily, a plurality of accommodating chambers 21 are arranged at intervals along the circumference of the rotating disk 20, and two relative accommodating chambers 21 located in the radial direction are connected, and the balancing liquid therein can be redistributed.

[0025] The rotating disk 20 is also provided with a plurality of first air passages 22, which correspond one to one with the plurality of accommodating chambers 21, so that each accommodating chamber 21 can change the air pressure of the accommodating chamber 21 by injecting gas, thereby inhaling or discharging the balance liquid to achieve the function of adjusting the balance. The plurality of first air passages 22 are located on the same side of the rotating disk 20, and illustratively, the plurality of first air passages 22 are located on the side of the rotating disk 20 facing the air pressure distribution disk 30, so that the air pressure distribution disk 30 transfers gas to the first air passages 22 of the rotating disk 20.

[0026] The air pressure distribution plate 30 is connected to the fixed bracket 10, and as a static component, the rotating disc 20 and the rotating shaft 200 rotate at high speed relative to the fixed bracket 10. The air pressure distribution plate 30 is annular so as to be sleeved on the rotating shaft 200. The air pressure distribution plate 30 and the rotating disc 20 are sequentially arranged along the axial direction of the rotating shaft 200, so that one side of the air pressure distribution plate 30 can be arranged opposite to the side of the rotating disc 20 where the first air channel 22 is arranged. The air pressure distribution plate 30 is provided with a plurality of second air channels 31 on one side facing the rotating disc 20, and the plurality of second air channels 31 correspond to the plurality of first air channels 22 one by one, so that each first air channel 22 can transmit gas by a corresponding second air channel 31, and then transmit the gas to the accommodating chamber 21 to achieve redistribution of the balancing liquid.

[0027] It should be noted that the air supply of the second air passages 31 can be controlled by a controller. Exemplarily, air can be supplied to one or more of the second air passages 31 .

[0028] Therefore, refer to Figure 1-Figure 7 According to the coaxial air pressure transmission device 100 of the embodiment of the present application, a rotating disk 20 fixedly connected to the rotating shaft 200 is provided to rotate with the rotating shaft 200. The rotating disk 20 is provided with a plurality of accommodating chambers 21 for containing a balancing liquid, and the balancing liquid is redistributed by adjusting the air pressure in the accommodating chamber 21, thereby suppressing the vibration of the rotating shaft 200 without stopping the machine. By providing a plurality of first air channels 22 corresponding to the plurality of accommodating chambers 21 on the rotating disk 20, and providing a plurality of second air channels 31 corresponding to the first air channels 22 on the air pressure rotating disk 20 connected to the fixed bracket 10, air is supplied to the first air channels 22 through the second air channels 31 to change the air pressure in the corresponding accommodating chamber 21.

[0029] In some embodiments of the present application, reference Figure 4-Figure 7 , multiple second air channels 31 are arranged at radial intervals along the air pressure distribution disk 30; multiple accommodating cavities 21 are evenly arranged along the circumference of the rotating disk 20, and multiple first air channels 22 are arranged at circumferential intervals along the rotating disk 20 and at radial intervals along the rotating disk 20.

[0030] The plurality of second air passages 31 are arranged at intervals along the radial direction of the air pressure distribution disk 30, that is, the plurality of second air passages 31 are arranged at different diameters of the distribution disk, and the plurality of first air passages 22 are arranged at intervals along the radial direction of the rotating disk 20, that is, the plurality of first air passages 22 are arranged at different diameters of the rotating disk 20, so that when the rotating disk 20 rotates relative to the air pressure distribution disk 30, it can be ensured that each first air passage 22 corresponds to a second air passage 31. The plurality of accommodating cavities 21 are evenly arranged along the circumference of the rotating disk 20, so as to facilitate the balance of the rotating disk 20 after the balancing liquid is contained, and the plurality of first air passages 22 are arranged at intervals along the circumference of the rotating disk 20, so as to be connected with the plurality of accommodating cavities 21 in a one-to-one correspondence.

[0031] It should be noted that when the rotating disk 20 rotates relative to the air pressure distribution disk 30, during the rotation process, the first air channel 22 and the second air channel 31 do not necessarily have to correspond to each other at every moment to transfer gas, as long as there is a moment during the rotation process when the gas can be transferred.

[0032] Specifically, the accommodating chamber 21 can be set to four, including the first accommodating chamber 21a, the second accommodating chamber 21b, the third accommodating chamber 21c and the fourth accommodating chamber 21d. The corresponding first airway 22 can be set to four, including the first airway 22a, the second first airway 22b, the third first airway 22c and the fourth first airway 22d. The second airway 31 can be set to four, including the first second airway 31a, the second second airway 31b, the third second airway 31c and the fourth second airway 31d.

[0033] Of course, the present application is not limited thereto, and in other embodiments, the number of the accommodating cavities 21 may also be six, eight, or the like.

[0034] In some embodiments of the present application, reference Figure 8 The first air channel 22 includes at least one first groove 221, and an air hole 222 is provided in the first groove 221; the second air channel 31 includes a plurality of second grooves 311 arranged at intervals along the circumference of the air pressure distribution plate 30, and the opening size of the second groove 311 is the same as the opening size of the first groove 221.

[0035] By setting up a first air channel 22 including a first groove 221 and a second air channel 31 including a second groove 311, and the opening size of the second groove 311 is the same as the opening size of the first groove 221, when the first groove 221 is opposite to the second groove 311, a larger gas transfer cavity can be formed, which is beneficial to maintaining the intake pressure and facilitating the gas to pass through the transfer cavity via the air hole 222 into the accommodating cavity 21.

[0036] Specifically, the first groove 221 may be annular, that is, arranged around the rotating disk 20 for one circle. At this time, the second groove 311 may also be annular, arranged around the air pressure distribution disk 30 for one circle.

[0037] The second air channel 31 includes a plurality of second grooves 311, which can be set to be arc-shaped and evenly distributed along the circumference of the air pressure distribution plate 30. In this case, the first air channel 22 can include one or more first grooves 221, which are also arc-shaped. Exemplarily, the second air channel 31 includes twelve second grooves 311 evenly distributed along the circumference of the air pressure distribution plate 30, and the first air channel 22 includes one first groove 221.

[0038] It is understandable that one or more air holes 222 may be provided, and one or more air holes 222 may be provided in one first groove 221 .

[0039] In some embodiments of the present application, reference Figure 4 and Fig. 9 One of the air pressure distribution plate 30 and the fixed bracket 10 is provided with a guide rail 11 along the first direction, and the other is provided with a slider 32 matched with the guide rail 11.

[0040] By providing the guide rail 11 along the first direction and the slider 32 matched with the guide rail 11 , the air pressure distribution plate 30 can move along the first direction relative to the fixed bracket 10 to change the distance between it and the rotating plate 20 .

[0041] It should be noted that the distance between the air pressure distribution plate 30 and the rotating disk 20 can be controlled by a controller according to whether gas transmission is needed. When gas transmission is needed, the air pressure distribution plate 30 is moved along the first direction to approach the rotating disk 20 to facilitate gas transmission. When gas transmission is not needed, the air pressure distribution plate 30 is moved along the first direction away from the rotating disk 20 to prevent the air pressure distribution plate 30 from affecting the rotation of the rotating disk 20.

[0042] Specifically, the guide rail 11 can be arranged on the outer periphery of the air pressure distribution plate 30 , and in this case, the slider 32 is arranged on the inner periphery of the fixed bracket 10 ; the guide rail 11 can also be arranged on the inner periphery of the fixed bracket 10 , and in this case, the slider 32 is arranged on the outer periphery of the air pressure distribution plate 30 .

[0043] In some embodiments, a plurality of guide rails 11 and sliders 32 may be provided to improve the stability of the movement of the air pressure distribution plate 30 .

[0044] In some embodiments of the present application, reference Figure 4 , Fig.10 and Fig.11 , and also includes a composite bearing wheel assembly 40, which includes a plurality of composite bearings 41 arranged at intervals along the circumference of the air pressure distribution disk 30 and facing the rotating disk 20, and the axial direction of the composite bearing 41 is perpendicular to the first direction, and the composite bearing 41 includes a small bearing 411 and a large bearing 412 that are concentrically assembled.

[0045] By arranging a plurality of composite bearings 41 whose axial directions are perpendicular to the first direction on the air pressure distribution disk 30 , a smaller gap can be ensured when the air pressure distribution disk 30 is close to the rotating disk 20 , and high-speed rotation of the rotating disk 20 is ensured.

[0046] It should be noted that ordinary large-diameter bearings cannot meet high speed requirements. For example, the maximum speed of a 619 / 500 deep groove ball bearing with an inner diameter of 500 mm is only 800 r / min. In this application, a composite bearing 41 is formed by sleeve-joining a small bearing 411 and a large bearing 412, and its applicable speed can reach tens of thousands of revolutions per minute. If multiple sets of bearings are stacked, higher speed requirements can be met.

[0047] Specifically, the small bearing 411 is nested in the inner ring of the large bearing 412 , and the outer ring of the large bearing 412 is also covered with an outer rubber layer 413 .

[0048] In some embodiments, three composite bearings 41 are provided, and the three composite bearings 41 are evenly distributed along the circumference of the pneumatic rotating disk 20 .

[0049] In some embodiments of the present application, reference Fig.10 The composite bearing wheel assembly 40 also includes an annular bearing frame 42, the outer periphery of the bearing frame 42 is connected to the air pressure distribution plate 30, the bearing frame 42 is a channel steel, and the bearing frame 42 is connected to a plurality of core shafts 421 spaced apart along the circumferential direction. The core shafts 421 are arranged along the radial direction of the bearing frame 42, and the composite bearing 41 is installed on the core shafts 421.

[0050] The annular bearing frame 42 is conveniently connected to the inner periphery of the air pressure distribution plate 30. For example, the bearing frame 42 and the air pressure distribution plate 30 can be detachably connected by a connecting piece, and specifically, the bearing frame 42 and the air pressure distribution plate 30 can be connected by bolts. In some embodiments, an elastic member is provided between the composite bearing 41 and the bearing frame 42, and the elastic direction of the elastic member is along the first direction, so as to buffer the interaction force when the air pressure distribution plate 30 and the rotating plate 20 are close to each other. For example, the elastic member can be a spring.

[0051] The bearing frame 42 is made of channel steel, which is easy to obtain and easy to set the core shaft 421. Specifically, there are three core shafts 421, and the three core shafts 421 are evenly arranged along the circumference of the bearing frame 42. The core shaft 421 is arranged along the radial direction of the bearing frame 42, which is conducive to the relative rotation of the composite bearing 41 installed on the core shaft 421 and the rotating disk 20.

[0052] In some embodiments of the present application, reference Fig. 9 , and also includes a plurality of drive assemblies 50 arranged at intervals along the circumference of the fixed bracket 10 , and the output end of the drive assembly 50 is connected to the air pressure distribution plate 30 .

[0053] By providing the driving assembly 50, it is convenient to control the movement of the air pressure distribution plate 30 along the first direction, thereby realizing automatic control.

[0054] Specifically, four drive assemblies 50 are evenly arranged along the circumference of the fixed bracket 10. The drive assembly 50 may include an electromagnetic actuator. The drive assembly 50 also includes a drive bracket 51, which may be an I-shaped bracket, the open end of the I-shaped bracket is connected to the fixed bracket 10, and the electromagnet 52 of the electromagnetic actuator is arranged at the closed end of the I-shaped bracket. The push rod 53 of the electromagnetic actuator is controlled to move along the first direction by the electromagnet 52, and the push rod 53 is connected to the air pressure distribution plate 30 to control the movement of the air pressure distribution plate 30. A wiring hole is provided on the drive bracket 51 to facilitate receiving the control signal of the electromagnetic actuator.

[0055] In some embodiments of the present application, reference Figure 1-Figure 3 , and also includes a first side plate 60 and a second side plate 70, which are respectively connected to opposite sides of the fixed bracket 10 to enclose an installation cavity, one side of the rotating disk 20 faces the first side plate 60, and the other side is provided with a positioning sleeve 14.

[0056] By setting the first side plate 60 and the second side plate 70, the components in the installation cavity are protected. In order to reduce the overall volume of the device and to distinguish the first side plate 60 from the second side plate 70, the first side plate 60 is set as a convex side plate and the second side plate 70 is set as a flat side plate. The threaded hole of the second side plate 70 is set as a countersunk type. There is a gap between the first side plate 60, the second side plate 70 and the rotating shaft 200 to avoid collision when the rotating shaft 200 rotates. By setting a positioning sleeve 14 on the other side of the rotating disk 20, both sides of the rotating disk 20 have limit members, which improves the stability of the rotation of the rotating disk 20.

[0057] Specifically, the first side plate 60 and the second side plate 70 are detachably connected to the fixing bracket 10 through a connecting piece. Exemplarily, the first side plate 60 and the second side plate 70 can be threadedly connected to the fixing bracket 10. The positioning sleeve 14 is set as a split structure and is connected by a connecting piece, such as a bolt and a nut.

[0058] In some embodiments of the present application, reference Figure 2 and Figure 3 A displacement sensor 12 is provided in the mounting cavity for measuring the distance between the rotating disk 20 and the air pressure distribution disk 30 .

[0059] By providing the displacement sensor 12 to measure the distance between the rotating disk 20 and the air pressure distribution disk 30 , the distance that the driving assembly 50 drives the air pressure distribution disk 30 to move can be controlled.

[0060] Specifically, the displacement sensor 12 may be disposed on the inner wall of the convex side plate.

[0061] In some embodiments of the present application, reference Figure 2 and Figure 3 An air source component 13 is provided in the installation cavity. The air source component 13 is connected to the air intake structure of the air pressure distribution plate 30 to supply air to the air pressure distribution plate 30 . The air intake structure is connected to the second air duct 31 .

[0062] By providing the gas source assembly 13 , the high-pressure gas is increased for the gas pressure distribution plate 30 .

[0063] Specifically, an air intake structure may be provided on the end surface of the air pressure distribution plate 30 perpendicular to the first direction, and the air intake structure is connected to a conduit, and the conduit cooperates with the air source connector 131 of the air source assembly 13 to transmit high-pressure gas from the air source assembly 13 to the air pressure distribution plate 30. The air source connector 131 may be connected to the fixed bracket 10 through a connector.

[0064] The air intake structure is connected to the second air passage 31 to supply air to the plurality of second air passages 31. Valves are respectively arranged between the air intake structure and the plurality of second air passages 31, and the closing and opening of different second air passages 31 are controlled by controlling the opening and closing of the valves.

[0065] In the description of this specification, the description with reference to the terms "embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0066] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A coaxial air pressure transmission device for a large-diameter high-speed rotating shaft, used for sleeve connection to the rotating shaft, characterized in that: include: Fixed bracket; A rotating disk, used for being fixedly connected to the rotating shaft, the rotating disk is provided with a plurality of accommodating cavities, and a plurality of first air passages corresponding to and communicating with the plurality of accommodating cavities one by one, and the plurality of first air passages are located on the same side of the rotating disk; An air pressure distribution plate is connected to the fixed bracket and is arranged in sequence with the rotating plate along a first direction, the first direction being the axial direction of the rotating shaft. A plurality of second air ducts are provided on one side of the air pressure distribution plate facing the rotating plate, and the plurality of second air ducts correspond one-to-one to the plurality of first air ducts.

2. The coaxial air pressure transmission device according to claim 1, characterized in that: A plurality of the second air passages are arranged at intervals along the radial direction of the air pressure distribution plate; The plurality of accommodating cavities are evenly arranged along the circumference of the rotating disk, and the plurality of first air passages are spaced apart along the circumference of the rotating disk and spaced apart along the radial direction of the rotating disk.

3. The coaxial air pressure transmission device according to claim 2, characterized in that: The first air channel comprises at least one first groove, and an air hole is provided in the first groove; The second air channel includes a plurality of second grooves spaced apart along a circumferential direction of the air pressure distribution plate, and the opening size of the second grooves is the same as the opening size of the first grooves.

4. The coaxial air pressure transmission device according to claim 1, characterized in that: One of the air pressure distribution plate and the fixed bracket is provided with a guide rail along a first direction, and the other is provided with a sliding block matched with the guide rail.

5. The coaxial air pressure transmission device according to claim 4, characterized in that: It also includes a composite bearing wheel assembly, which includes a plurality of composite bearings spaced apart circumferentially along the air pressure distribution disk and facing the rotating disk, wherein the axial direction of the composite bearing is perpendicular to the first direction, and the composite bearing includes a small bearing and a large bearing which are concentrically assembled.

6. The coaxial air pressure transmission device according to claim 5, characterized in that: The composite bearing wheel assembly also includes an annular bearing frame, the outer periphery of the bearing frame is connected to the air pressure distribution plate, the bearing frame is a channel steel, and the bearing frame is connected to a plurality of core shafts at intervals along the circumferential direction. The core shafts are arranged along the radial direction of the bearing frame, and the composite bearing is installed on the core shafts.

7. The coaxial air pressure transmission device according to claim 4, characterized in that: It also includes a plurality of drive assemblies spaced apart along the circumference of the fixed bracket, and the output ends of the drive assemblies are connected to the air pressure distribution plate.

8. The coaxial air pressure transmission device according to claim 1, characterized in that: It also includes a first side plate and a second side plate, wherein the first side plate and the second side plate are respectively connected to opposite sides of the fixing bracket to enclose a mounting cavity, one side of the rotating disk faces the first side plate, and the other side is provided with a positioning sleeve.

9. The coaxial air pressure transmission device according to claim 8, characterized in that: A displacement sensor is arranged in the installation cavity for measuring the distance between the rotating disk and the air pressure distribution disk.

10. The coaxial air pressure transmission device according to claim 8, characterized in that: An air source component is provided in the installation cavity, and the air source component is connected to the air intake structure of the air pressure distribution plate to supply air to the air pressure distribution plate, and the air intake structure is communicated with the second air channel.

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