Multi-hole throttling air shaft

Abstract

The utility model discloses a multi-hole throttling air shaft which comprises a shaft sleeve and a main shaft, a multi-hole throttling graphite ring is arranged in the shaft sleeve, air holes are evenly distributed in the surface of the multi-hole throttling graphite ring, the main shaft is arranged in the multi-hole throttling graphite ring, an air floatation gap is arranged between the multi-hole throttling graphite ring and the main shaft, and the air floatation gap is arranged in the shaft sleeve. The air hole is communicated with the air floatation gap, and an air flow channel is arranged on the shaft sleeve and communicated with the air hole. According to the porous throttling graphite ring provided by the utility model, the flow and pressure of airflow can be effectively controlled through the micropores carried by the graphite material, and meanwhile, the dense micropores can enable the airflow to enter an air floatation gap more uniformly, so that the suspension stability of a main shaft is improved.

Description

Technical Field

[0001] The utility model relates to a multi-hole throttling gas shaft. 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, the existing technical problem is that, by setting an air duct in the air inlet pipe, the air duct is used to convey the airflow to the inner air chamber so that the shaft is suspended in the inner air chamber. The setting of such an air duct cannot reduce the airflow input from the outside. When the high-flow airflow is input into the inner air chamber, under the action of high flow and high pressure, it is easy to affect the stability of the shaft suspension, and it is easy to cause problems such as axis deviation and shaking. 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 porous throttling gas shaft which uses a porous throttling graphite ring to reduce flow and improve suspension stability.

[0005] A porous throttling air shaft designed for this purpose includes a shaft sleeve and a main shaft, wherein a porous throttling graphite ring is arranged in the shaft sleeve, and pores are evenly distributed on the surface of the porous throttling graphite ring, the main shaft is arranged in the porous throttling graphite ring, and an air flotation gap is arranged between the porous throttling graphite ring and the main shaft, the pores are connected with the air flotation gaps, and an air flow channel is arranged on the shaft sleeve, and the air flow channel is connected with the pores.

[0006] Preferably, an annular recessed space is arranged on the wall surface of the porous throttling graphite ring facing the sleeve, the pores are evenly distributed in the annular recessed space, and a plurality of conveying channels are arranged at positions of the sleeve corresponding to the annular recessed space, and the conveying channels are connected with the annular recessed space and the air flow channel.

[0007] Preferably, the shaft sleeve is provided with an air inlet connector which is connected with the air flow channel.

[0008] Compared with the prior art, the utility model has a porous throttling graphite ring arranged in the sleeve, the surface of the porous throttling graphite ring is evenly distributed with pores, the main shaft is arranged in the porous throttling graphite ring, an air flotation gap is arranged between the porous throttling graphite ring and the main shaft, the pores are connected with the air flotation gap, and an air flow channel is arranged on the sleeve, and the air flow channel is connected with the pores. The porous throttling graphite ring arranged in the utility model can effectively control the flow rate and pressure of the air flow through the micropores carried by the graphite material itself, and at the same time, its own dense micropores can make the air flow enter the air flotation gap more evenly, so as to improve the stability of the main shaft suspension. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model;

[0010] Figure 2 Schematic diagram of the structure of a porous throttling graphite ring. DETAILED DESCRIPTION

[0011] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0012] See also Figure 1 and Figure 2 A porous throttling gas shaft includes a sleeve 10 and a main shaft 20. A porous throttling graphite ring 30 is arranged in the sleeve 10. The surface of the porous throttling graphite ring 30 is uniformly distributed with pores. The main shaft 20 is arranged in the porous throttling graphite ring 30. An air flotation gap 40 is arranged between the porous throttling graphite ring 30 and the main shaft 20. The pores are connected to the air flotation gap 40. An air flow channel 110 is arranged on the sleeve 10, and the air flow channel 110 is connected to the pores. The micropores carried by the graphite material itself can effectively control the flow rate and pressure of the air flow. At the same time, the dense micropores of the graphite material itself can make the air flow enter the air flotation gap more evenly, so as to improve the stability of the main shaft suspension.

[0013] See also Figure 1 and Figure 2 The porous throttling graphite ring 30 is provided with an annular recessed space 310 on the wall surface facing the sleeve 10, the pores are evenly distributed in the annular recessed space 310, and the sleeve 10 is provided with a plurality of delivery channels 130 at positions corresponding to the annular recessed space 310, and the delivery channels 130 are connected with the annular recessed space 310 and the air flow channel 110. The external airflow is input into the air flow channel 110, and then flows into the annular recessed space 310 from the delivery channels 130. At this time, the airflow in the annular recessed space 310 is respectively input into the air flotation gap 40 from the pores, so that the main shaft 20 is suspended in the porous throttling graphite ring 30.

[0014] See also Figure 1 The shaft sleeve 10 is provided with an air inlet connector 120 which is in communication with the air flow channel 110. The air inlet connector 120 is used to connect to an external air source.

[0015] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0016] 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.

[0017] 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 multi-hole throttling gas shaft, comprising a shaft sleeve (10) and a main shaft (20), characterized in that: A porous throttling graphite ring (30) is arranged in the shaft sleeve (10), and pores are evenly distributed on the surface of the porous throttling graphite ring (30). The main shaft (20) is arranged in the porous throttling graphite ring (30), and an air flotation gap (40) is arranged between the porous throttling graphite ring (30) and the main shaft (20), and the pores are connected to the air flotation gap (40). An air flow channel (110) is arranged on the shaft sleeve (10), and the air flow channel (110) is connected to the pores.

2. A multi-hole throttling gas shaft according to claim 1, characterized in that: An annular recessed space (310) is arranged on the wall surface of the porous throttling graphite ring (30) facing the shaft sleeve (10), the air holes are evenly distributed in the annular recessed space (310), and the shaft sleeve (10) is provided with a plurality of conveying channels (130) at positions corresponding to the annular recessed space (310), and the conveying channels (130) are connected to the annular recessed space (310) and the air flow channel (110).

3. A porous throttling gas shaft according to claim 1 or 2, characterized in that: The shaft sleeve (10) is provided with an air intake joint (120) which is in communication with the air flow channel (110).

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