Small hole throttling air shaft structure

Abstract

The utility model discloses a small hole throttling air shaft structure which comprises a shaft sleeve assembly, a main shaft is arranged in the shaft sleeve assembly, an air floatation gap is arranged between the main shaft and the shaft sleeve assembly, a main flow channel is arranged in the shaft sleeve assembly, and an air flow connector communicated with the main flow channel is arranged on the shaft sleeve assembly. The shaft sleeve assembly is provided with a plurality of airflow hole channels, the airflow hole channels are communicated with the main flow channel and the air floatation gap respectively, and a first throttler is arranged in each airflow hole channel. According to the utility model, the first throttler is arranged, when external airflow enters the airflow runner through the main runner, the airflow enters the first throttler and then is input into the air floatation gap, so that the main shaft is suspended in the shaft sleeve assembly, and the first throttler can effectively control the flow and pressure of airflow input so as to improve the suspension stability of the main shaft.

Description

Technical Field

[0001] The utility model relates to a small hole throttling gas shaft structure. Background Art

[0002] Prior art, such as the Chinese utility model patent document with publication number CN212509225U, discloses an air suspension bearing, comprising a bearing housing, on which an air inlet channel is radially arranged; a bearing front cover and a bearing rear cover are respectively connected to the two axial ends of the bearing housing, and an air inlet pipe is connected between the bearing front cover and the bearing rear cover; a rotating shaft connected to the motor is arranged in the air inlet pipe; an outer air chamber is arranged between the outer side of the air inlet pipe and the inner side of the bearing housing, and an inner air chamber is arranged between the inner side of the air inlet pipe and the rotating shaft; a plurality of air ducts connecting the inner and outer air chambers are arranged on the pipe wall of the air inlet pipe; a plurality of grooves are evenly distributed in the radial circumferential direction in the air inlet pipe, and an elastic support is fixed in the groove, and an end of the elastic support close to the rotating shaft in the radial direction extends out of the air inlet pipe and maintains a certain gap with the rotating shaft.

[0003] Based on the above, in the prior art, the external airflow is input from the air inlet channel through multiple air ducts to the inner air chamber, so that the rotating shaft located in the inner air chamber is suspended. The problem with this airflow flow mode is that the airflow flow rate and pressure cannot be adjusted. This large flow rate and high pressure airflow cannot ensure the stability of the rotating shaft suspension when entering the inner air chamber and acting on the rotating shaft. If the flow rate of the airflow is adjusted by the external delivery end, the adjustment range will be too limited and cannot be adjusted to a relatively stable flow range. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a small hole throttling air shaft structure capable of controlling air flow and pressure.

[0005] A small-hole throttling air shaft structure designed for this purpose includes a shaft sleeve assembly, a main shaft is arranged in the shaft sleeve assembly, an air flotation gap is arranged between the main shaft and the shaft sleeve assembly, a main flow channel is arranged in the shaft sleeve assembly, an air flow joint connected to the main flow channel is arranged on the shaft sleeve assembly, a plurality of air flow channels are arranged on the shaft sleeve assembly, the air flow channels are respectively connected to the main flow channel and the air flotation gap, and a first throttle is arranged in each air flow channel.

[0006] Preferably, an axial stabilization component is provided at one end of the sleeve component, the axial stabilization component forms an axial air flotation cavity, an air flotation matching ring is provided at one end of the main shaft close to the axial air flotation cavity, and the air flotation matching ring is axially floatingly arranged in the axial air flotation cavity;

[0007] Two groups of axial air flow channels are arranged on the axial stabilization component at intervals along the axis direction of the main shaft, and the axial air flow channels are connected to the main flow channel;

[0008] A second throttle is arranged in the axial air flow channel.

[0009] Preferably, the axial stabilization assembly comprises a first annular element, a gasket and a second annular element which are sequentially arranged along the axial direction of the main shaft, and the first annular element and the second annular element are spaced apart along the axial direction of the main shaft to form the axial air floating cavity;

[0010] Two groups of axial air flow channels are respectively arranged on the first annular element and the second annular element;

[0011] Each group of axial air flow channels is provided with a plurality of axial air flow channels arranged along the circumference.

[0012] Preferably, a first flow channel is provided on the first annular element, a second flow channel is provided on the gasket, and a third flow channel is provided on the second annular element. The first flow channel, the second flow channel and the third flow channel are interconnected. The first flow channel and the third flow channel are both connected to the axial airflow channel, and the first flow channel is connected to the main flow channel.

[0013] Preferably, the first annular element, the washer and the second annular element are fixed in sequence by bolts;

[0014] The first annular element is fixedly connected to the shaft sleeve assembly.

[0015] Preferably, the first flow channel, the second flow channel and the third flow channel form an axial air floating flow channel, and the first annular element or the gasket or the second annular element is provided with an exhaust hole, and the exhaust hole is communicated with the axial air floating flow channel.

[0016] Preferably, the sleeve assembly includes an inner sleeve and an outer sleeve assembled with each other, the main shaft is arranged in the inner sleeve, the main channel and the airflow joint are arranged on the outer sleeve, the airflow channel is arranged on the inner sleeve, and a connecting channel connected with the main channel and the airflow channel is arranged at a position of the outer sleeve corresponding to the airflow channel.

[0017] Compared with the prior art, the utility model has a main shaft arranged in the sleeve assembly, an air flotation gap arranged between the main shaft and the sleeve assembly, a main flow channel arranged in the sleeve assembly, an air flow joint connected to the main flow channel arranged on the sleeve assembly, a plurality of air flow channels arranged on the sleeve assembly, the air flow channels respectively connected to the main flow channel and the air flotation gap, and a first throttle arranged in each air flow channel. The utility model is provided with a first throttle, when the external air flow enters the air flow channel through the main flow channel, the air flow will enter the first throttle, and then be input into the air flotation gap, so that the main shaft is suspended in the sleeve assembly, and the first throttle can effectively control the flow rate and pressure of the air flow input to improve the stability of the main shaft suspension. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model;

[0019] Figure 2 For this utility model Figure 1 The enlarged structural diagram at A in the middle;

[0020] Figure 3 It is a partial structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] See also Figure 1-Figure 3 A small-hole throttling air shaft structure includes a sleeve assembly 10, a main shaft 20 is arranged in the sleeve assembly 10, an air flotation gap 200 is arranged between the main shaft 20 and the sleeve assembly 10, a main flow channel 110 is arranged in the sleeve assembly 10, an air flow joint 100 connected with the main flow channel 110 is arranged on the sleeve assembly 10, a plurality of air flow channels 120 are arranged on the sleeve assembly 10, and the air flow channels 120 are respectively connected with the main flow channel 110 and the air flotation gap 200, and a first throttle 130 is arranged in each air flow channel 120. The utility model is provided with a first throttle, when the external air flow enters the air flow channel through the main flow channel, the air flow will enter the first throttle, and then input into the air flotation gap, so that the main shaft is suspended in the sleeve assembly, and the first throttle can effectively control the flow rate and pressure of the air flow input to improve the stability of the main shaft suspension.

[0023] See also Figure 1 and Figure 2An axial stabilization component 50 is provided at one end of the sleeve assembly 10, and the axial stabilization component 50 forms an axial air flotation cavity 500. An air flotation matching ring 210 is provided at one end of the main shaft 20 close to the axial air flotation cavity 500, and the air flotation matching ring 210 is axially floatingly arranged in the axial air flotation cavity 500; two groups of axial air flow channels 160 are spaced apart on the axial stabilization component 50 along the axial direction of the main shaft 20, and the axial air flow channels 160 are interconnected with the main channel 110; a second throttle 60 is arranged in the axial air flow channel 160.

[0024] Under the action of the two groups of axial airflow channels 160, the external airflow is input through the main channel 110 and output from the two groups of axial airflow channels 160. The two groups of axial airflow channels 160 are arranged opposite to each other, and the airflow directions output by the two groups of axial airflow channels 160 are opposite to each other, thereby improving the axial stability of the main shaft 20 and reducing the problem of axial shaking. At the same time, a second throttle 60 is provided, which can accurately control the airflow flow and pressure output to the axial air flotation chamber 500, which can effectively improve the stability.

[0025] Furthermore, the internal flow channels of the first throttle and the second throttle are composed of an input flow channel 131 and a flow reducing flow channel 132. The diameter of the flow reducing flow channel 132 is smaller than that of the input flow channel 131. When the external airflow is input from the main channel to the input flow channel 131 and then flows into the flow reducing flow channel 132, its flow rate is affected by the diameter of the flow reducing flow channel 132 to achieve flow regulation. When the flow rate decreases, its pressure also decreases.

[0026] See also Figure 2 The axial stabilization component 50 includes a first annular element 140, a gasket 40 and a second annular element 30 which are arranged in sequence along the axial direction of the main shaft 20. The first annular element 140 and the second annular element 30 are spaced apart along the axial direction of the main shaft 20 to form the axial air flotation cavity 500; two groups of axial air flow channels 160 are respectively arranged on the first annular element 140 and the second annular element 30; each group of axial air flow channels 160 is provided with a plurality of channels and are arranged along the circumference.

[0027] The two groups of axial air flow channels 160 spaced apart along the axial direction can effectively constrain the axial direction stability of the air-floating matching ring 210 to improve the axial stability of the entire main shaft 20 .

[0028] See also Figure 1The first annular element 140 is provided with a first flow channel 150, the gasket 40 is provided with a second flow channel 410, the second annular element 30 is provided with a third flow channel 310, the first flow channel 150, the second flow channel 410 and the third flow channel 310 are connected to each other, the first flow channel 150 and the third flow channel 310 are both connected to the axial air flow channel 160, and the first flow channel 150 is connected to the main flow channel 110. The airflow input from the main flow channel 110 flows to the second flow channel 410 and the third flow channel 310 in sequence, so that the airflow enters the axial air flow channel 160.

[0029] In the present invention, the first annular element 140 , the washer 40 and the second annular element 30 are fixed in sequence by bolts 70 ; the first annular element 140 is fixedly connected to the shaft sleeve assembly 10 .

[0030] See also Figure 1 and Figure 3 The first flow channel 150, the second flow channel 410 and the third flow channel 310 form an axial air-floating flow channel, and the first annular element 140 or the gasket 40 or the second annular element 30 is provided with an exhaust hole 80, and the exhaust hole 80 is connected with the axial air-floating flow channel. Excess air is discharged to the outside from the exhaust hole 80.

[0031] See also Figure 1 The sleeve assembly 10 includes an inner sleeve 101 and an outer sleeve 102 assembled with each other, the main shaft 20 is arranged in the inner sleeve 101, the main channel 110 and the airflow joint 100 are arranged on the outer sleeve 102, the airflow channel 120 is arranged on the inner sleeve 101, and a connecting channel 103 connected with the main channel 110 and the airflow channel 120 is arranged at a position of the outer sleeve 102 corresponding to the airflow channel 120.

[0032] Furthermore, the first annular element 140 is disposed on the inner sleeve 101 .

[0033] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element 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. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0035] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments. The above embodiments and the description are only to illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A small-hole throttling air shaft structure, comprising a shaft sleeve assembly (10), a main shaft (20) is arranged in the shaft sleeve assembly (10), an air flotation gap (200) is arranged between the main shaft (20) and the shaft sleeve assembly (10), a main flow channel (110) is arranged in the shaft sleeve assembly (10), and an air flow joint (100) connected to the main flow channel (110) is arranged on the shaft sleeve assembly (10), characterized in that: The shaft sleeve assembly (10) is provided with a plurality of air flow channels (120), the air flow channels (120) are respectively connected to the main flow channel (110) and the air flotation gap (200), and a first throttle (130) is provided in each air flow channel (120).

2. A small hole throttling air shaft structure according to claim 1, characterized in that: An axial stabilization component (50) is disposed at one end of the shaft sleeve component (10), and an axial air-floating cavity (500) is formed on the axial stabilization component (50); an air-floating matching ring (210) is disposed at one end of the main shaft (20) close to the axial air-floating cavity (500), and the air-floating matching ring (210) is disposed in the axial air-floating cavity (500) in a floating manner along the axial direction; Two groups of axial air flow channels (160) are arranged on the axial stabilization component (50) at intervals along the axial direction of the main shaft (20), and the axial air flow channels (160) are connected to the main flow channel (110); A second throttle (60) is disposed in the axial air flow channel (160).

3. A small hole throttling air shaft structure according to claim 2, characterized in that: The axial stabilization component (50) comprises a first annular element (140), a washer (40), and a second annular element (30) which are sequentially arranged along the axial direction of the main shaft (20); the first annular element (140) and the second annular element (30) are spaced apart along the axial direction of the main shaft (20) to form the axial air floating cavity (500); Two groups of axial air flow channels (160) are respectively arranged on the first annular element (140) and the second annular element (30); Each group of axial air flow channels (160) is provided with a plurality of channels arranged along the circumference.

4. A small hole throttling air shaft structure according to claim 3, characterized in that: The first annular element (140) is provided with a first flow channel (150), the gasket (40) is provided with a second flow channel (410), and the second annular element (30) is provided with a third flow channel (310). The first flow channel (150), the second flow channel (410) and the third flow channel (310) are interconnected. The first flow channel (150) and the third flow channel (310) are both connected to the axial air flow channel (160), and the first flow channel (150) is connected to the main flow channel (110).

5. A small hole throttling air shaft structure according to claim 4, characterized in that: The first annular element (140), the washer (40) and the second annular element (30) are fixed in sequence by bolts (70); The first annular element (140) is fixedly connected to the shaft sleeve assembly (10).

6. A small hole throttling air shaft structure according to claim 4, characterized in that: The first flow channel (150), the second flow channel (410) and the third flow channel (310) constitute an axial air-floating flow channel. An exhaust hole (80) is provided on the first annular element (140) or the gasket (40) or the second annular element (30), and the exhaust hole (80) is interconnected with the axial air-floating flow channel.

7. A small hole throttling air shaft structure according to claim 1, characterized in that: The shaft sleeve assembly (10) comprises an inner shaft sleeve (101) and an outer shaft sleeve (102) which are assembled with each other, the main shaft (20) is arranged in the inner shaft sleeve (101), the main flow channel (110) and the air flow joint (100) are arranged on the outer shaft sleeve (102), the air flow channel (120) is arranged on the inner shaft sleeve (101), and a connecting channel (103) which is connected with the main flow channel (110) and the air flow channel (120) is arranged at a position of the outer shaft sleeve (102) corresponding to the air flow channel (120).

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