Gas-liquid combined high-rotating-speed dynamic pressure sliding bearing

Abstract

The invention discloses a gas-liquid combined type high-rotating-speed dynamic pressure sliding bearing which comprises a bearing shell, a bearing gland, a bearing tile, an adjusting block, a gas-liquid isolating ring, a gas inlet sealing connector, a gas outlet sealing connector, an elastic foil piece, a positioning pin and a rotating shaft. One side, close to the bearing gland, of the bearing shell, the bearing gland and the bearing pads form a liquid medium working section of the gas-liquid combined type high-speed dynamic pressure sliding bearing; the side, close to the air inlet sealing connector and the air outlet sealing connector, of the bearing shell, the air inlet sealing connector, the air outlet sealing connector and the elastic foil form gas medium working sections of the gas-liquid combined type high-speed dynamic pressure sliding bearing, and the liquid medium working sections are isolated from the gas medium working sections through gas-liquid isolating rings. The system has the advantages that online autonomous combination and switching of the gas medium working condition and the liquid medium working condition are achieved, and the technical problems that under the single working medium working condition, the response capacity is poor, and the working stability is insufficient are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of bearings, and more particularly to a gas-liquid combined high-speed dynamic pressure sliding bearing, and more particularly to a gas-liquid combined high-speed dynamic pressure sliding bearing for carrying a high-speed rotating shaft. Background Art

[0002] At present, most of the high-speed hydrodynamic sliding bearings used in industrial production in China adopt a single medium working mode, namely, liquid hydrodynamic sliding bearings or air-floating hydrodynamic sliding bearings. Liquid hydrodynamic sliding bearings rely on the relative movement of the high-speed rotating shaft and the bearing to form a layer of oil film with pressure in the bearing gap, float the high-speed rotating shaft and bear the external force. The air-floating hydrodynamic sliding bearing generates an air film through the high-speed rotating shaft and compressed air, so that the high-speed rotating shaft is suspended on the air film to achieve load-bearing. The air-floating hydrodynamic sliding bearing has no medium cost and supply difficulties, and the used gas is discharged into the atmosphere, which is easy to handle. The leakage of the medium will not seriously affect the work and will not pollute the environment. The viscosity of air is small, and the resistance loss in the pipeline is much smaller than that of hydraulic pressure, which is suitable for remote transmission and control. However, the compressibility of air is much greater than that of hydraulic oil, so it is not as good as hydraulic pressure in terms of action responsiveness and working speed stability. Therefore, there is an urgent need to design a gas-liquid combined high-speed dynamic pressure sliding bearing that can not only meet the requirements of precision high-speed industrial equipment for responsiveness and working stability, but also save equipment operating costs and reduce environmental pollution risks, so that it can be widely used in various fields such as metallurgy, mining, hydropower, chemical industry, light industry, etc., thereby improving production efficiency and reducing costs. Summary of the invention

[0003] In view of this, in order to solve the deficiencies of the above-mentioned prior art, the purpose of the present invention is to provide a gas-liquid combined high-speed dynamic pressure sliding bearing, which can solve the problems of ordinary dynamic pressure sliding bearings in responsiveness, working stability and environmental protection performance, and is widely used.

[0004] In order to achieve the above-mentioned purpose, the main technical scheme adopted by the present invention is as follows: a gas-liquid combined high-speed dynamic pressure sliding bearing, comprising a bearing housing (1), a bearing cover (2), a bearing pad (3), an adjustment block (4), a gas-liquid isolation ring (5), an air inlet sealing joint (6), an air outlet sealing interface (7), an elastic foil (8), a positioning pin (9), and a rotating shaft (10), wherein the bearing housing (1) is connected to the bearing cover (2), the bearing pad (3), the adjustment block (4), the air inlet sealing joint (6), and the air outlet sealing interface (7) by screws, and the rotating shaft (10) is connected to the bearing through the inner ring of the bearing.

[0005] Furthermore, the bearing housing (1) adopts a cylindrical structure, and the whole is cut into two sections along the central symmetry line.

[0006] Furthermore, the bearing pad (3), the bearing cover (2), the air inlet sealing joint (6), and the air outlet sealing interface (7) are connected to the bearing housing (1) via threads.

[0007] Furthermore, the bearing housing (1) is provided with an oil inlet hole (11) at the upper portion of one side close to the bearing cover (2), and an oil outlet hole (12) at the lower portion.

[0008] Furthermore, the side of the bearing housing (1) close to the bearing cover (2) together with the bearing cover (2) and the bearing pad (3) constitutes the liquid medium working section (I) of the gas-liquid combined high-speed dynamic pressure sliding bearing, and the side of the bearing housing (1) close to the air inlet sealing joint (6) and the air outlet sealing interface (7) together with the air inlet sealing joint (6), the air outlet sealing interface (7) and the elastic foil (8) constitutes the gas medium working section (II) of the gas-liquid combined high-speed dynamic pressure sliding bearing.

[0009] Furthermore, the oil required for the operation of the liquid medium working section (I) of the gas-liquid combined high-speed dynamic pressure sliding bearing enters the interior of the bearing through the oil inlet hole (11) and flows out of the bearing through the oil outlet hole (12).

[0010] Furthermore, the gas medium required for the operation of the gas medium working section (II) of the gas-liquid combined high-speed dynamic pressure sliding bearing enters the interior of the bearing through the gas pipe in the gas inlet sealing joint (6) and is discharged from the interior of the bearing through the gas pipe in the gas outlet sealing interface (7).

[0011] Furthermore, the elastic foil (8) is filled after the gas medium enters the interior of the bearing through the air inlet sealing joint (6), thereby assisting the gas medium working section (II) of the gas-liquid combined high-speed dynamic pressure sliding bearing to carry the rotating shaft (10).

[0012] Furthermore, the air intake speed of the air intake airtight joint (6) can be adjusted as required.

[0013] Furthermore, the gas-liquid isolation ring (5) is installed between the liquid medium working section (I) and the gas medium working section (II) of the gas-liquid combined high-speed dynamic pressure sliding bearing, and the contact surface with the rotating shaft 10 is a wedge-shaped structure.

[0014] Benefits

[0015] The gas-liquid combined high-speed dynamic pressure sliding bearing of the present invention can solve the problems existing in the response capability, working stability and environmental protection performance of ordinary dynamic pressure sliding bearings, and has a wide range of applications;

[0016] Compared with the existing high-speed dynamic pressure sliding bearings, the present invention adopts a design method in which two working media cooperate with each other, which can not only meet the characteristics of fast response capability and high working stability of the high-speed dynamic pressure bearing under the working condition of liquid working medium, but also use the gas medium to assist in supporting the rotating shaft, which can further improve the control accuracy while reducing the amount of bearing lubricating oil, avoid environmental pollution caused by medium leakage caused by increased oil consumption, and play a beneficial effect of improving the working performance of the bearing and reducing the risk of leakage of the working medium. It can be widely used in various fields such as metallurgy, mining, hydropower, chemical industry, light industry and textile. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an axial cross-sectional view of a gas-liquid combined high-speed dynamic pressure sliding bearing;

[0018] Figure 2 It is a radial cross-section diagram of a gas-liquid combined high-speed dynamic pressure sliding bearing.

[0019] Markings in the figure: Ⅰ, liquid medium working section of gas-liquid combined high-speed dynamic pressure sliding bearing; Ⅱ, gas medium working section of gas-liquid combined high-speed dynamic pressure sliding bearing; 1, bearing housing; 2, bearing cover; 3, bearing pad; 4, adjustment block; 5, gas-liquid isolation ring; 6, air inlet sealing joint; 7, air outlet sealing interface; 8, elastic foil; 9, positioning pin; 10, rotating shaft. DETAILED DESCRIPTION

[0020] In order to better explain the present invention and facilitate understanding, the present invention is described below through specific implementation modes in conjunction with the accompanying drawings.

[0021] The following specific examples are given to further clearly, completely and in detail illustrate the technical solution of the present invention. This example is the best example based on the technical solution of the present invention, but the protection scope of the present invention is not limited to the following examples.

[0022] A gas-liquid combined high-speed dynamic pressure sliding bearing, such as Figure 1 , Figure 2 As shown, it includes a bearing housing (1), a bearing cover (2), a bearing pad (3), an adjustment block (4), a gas-liquid isolation ring (5), an air inlet sealing joint (6), an air outlet sealing interface (7), an elastic foil (8), a positioning pin (9), and a rotating shaft (10). The bearing housing (1) is connected to the bearing cover (2), the bearing pad (3), the adjustment block (4), the air inlet sealing joint (6), and the air outlet sealing interface (7) by screws, and the rotating shaft (10) is connected to the bearing through the inner ring of the bearing.

[0023] Furthermore, the bearing housing (1) adopts a cylindrical structure, and the whole is cut into two sections along the central symmetry line, which is convenient for installing various internal components.

[0024] Furthermore, the bearing pad (3), the bearing cover (2), the air inlet sealing joint (6), and the air outlet sealing interface (7) are connected to the bearing housing (1) via screws.

[0025] Furthermore, the bearing housing (1) is provided with an oil inlet hole (11) at the upper portion of one side close to the bearing cover (2), and an oil outlet hole (12) at the lower portion.

[0026] Furthermore, the side of the bearing housing (1) close to the bearing cover (2) together with the bearing cover (2) and the bearing pad (3) constitutes the liquid medium working section (I) of the gas-liquid combined high-speed dynamic pressure sliding bearing, and the side of the bearing housing (1) close to the air inlet sealing joint (6) and the air outlet sealing interface (7) together with the air inlet sealing joint (6), the air outlet sealing interface (7) and the elastic foil (8) constitutes the gas medium working section (II) of the gas-liquid combined high-speed dynamic pressure sliding bearing.

[0027] Furthermore, the oil required for the operation of the liquid medium working section (I) of the gas-liquid combined high-speed dynamic pressure sliding bearing enters the interior of the bearing through the oil inlet hole (11) and flows out of the bearing through the oil outlet hole (12).

[0028] Furthermore, the gas medium required for the operation of the gas medium working section (II) of the gas-liquid combined high-speed dynamic pressure sliding bearing enters the interior of the bearing through the gas pipe in the gas inlet sealing joint (6) and is discharged from the interior of the bearing through the gas pipe in the gas outlet sealing interface (7).

[0029] Furthermore, the elastic foil (8) is filled after the gas medium enters the interior of the bearing through the air inlet sealing joint (6), thereby assisting the gas medium working section (II) of the gas-liquid combined high-speed dynamic pressure sliding bearing to carry the rotating shaft (10).

[0030] Furthermore, the air intake speed of the air intake airtight joint (6) can be adjusted as needed. In actual applications, the air intake speed of the air intake airtight joint (6) can be dynamically adjusted according to the rotation speed of the rotating shaft (10), thereby improving the motion characteristics of the rotating shaft (10) without changing the amount of oil used in the medium working section (I).

[0031] Furthermore, the gas-liquid isolation ring (5) is installed between the liquid medium working section (I) and the gas medium working section (II) of the gas-liquid combined high-speed dynamic pressure sliding bearing, and the contact surface with the rotating shaft (10) is a wedge-shaped structure, which can reduce the contact area between the gas-liquid isolation ring (5) and the rotating shaft (10), thereby reducing the friction force on the rotating shaft (10) and avoiding interference with the movement characteristics of the rotating shaft (10). At the same time, the wedge-shaped structure design can form a gas negative pressure between the liquid medium working section (I) and the gas medium working section (II), and the gas negative pressure can prevent oil from leaking into the gas medium working section (II). Due to the gas negative pressure, the gas entering the liquid medium working section (I) can be discharged from the bearing along with the oil through the oil outlet (12).

[0032] The gas-liquid combined high-speed dynamic pressure sliding bearing involved in the present invention adopts a design method in which two working media cooperate with each other, which can not only meet the characteristics of fast response capability and high working stability of the high-speed dynamic pressure bearing under the working condition of the liquid working medium, but also use the gas medium to assist in supporting the rotating shaft, which can further improve the control accuracy while reducing the amount of bearing lubricating oil, avoiding the environmental pollution problem caused by medium leakage due to the increase in oil consumption, and can solve the problems of ordinary dynamic pressure sliding bearings in response capability, working stability and environmental protection performance, and has a wide range of applications.

[0033] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0034] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A gas-liquid combined high-speed dynamic pressure sliding bearing, comprising a bearing housing (1), a bearing cover (2), a bearing pad (3), an adjustment block (4), a gas-liquid isolation ring (5), an air inlet sealing joint (6), an air outlet sealing interface (7), an elastic foil (8), a positioning pin (9), and a rotating shaft (10), wherein the bearing housing (1) is connected to the bearing cover (2), the bearing pad (3), the adjustment block (4), the air inlet sealing joint (6), and the air outlet sealing interface (7) by screws, and the rotating shaft (10) is connected to the bearing through the inner ring of the bearing.

2. The gas-liquid combined high-speed dynamic pressure sliding bearing according to claim 1, characterized in that: The bearing housing (1) adopts a cylindrical structure, and the whole is cut into two sections along a central symmetry line.

3. The gas-liquid combined high-speed dynamic pressure sliding bearing according to claim 1, characterized in that: The bearing pad (3), the bearing cover (2), the air inlet sealing joint (6) and the air outlet sealing interface (7) are connected to the bearing housing (1) via threads.

4. The gas-liquid combined high-speed dynamic pressure sliding bearing according to claim 1, characterized in that: The bearing housing (1) is provided with an oil inlet hole (11) at the upper part of one side close to the bearing cover (2), and an oil outlet hole (12) at the lower part.

5. The gas-liquid combined high-speed dynamic pressure sliding bearing according to claim 1, characterized in that: The side of the bearing housing (1) close to the bearing cover (2) together with the bearing cover (2) and the bearing pad (3) constitutes the liquid medium working section (I) of the gas-liquid combined high-speed dynamic pressure sliding bearing, and the side of the bearing housing (1) close to the air inlet sealing joint (6) and the air outlet sealing interface (7) together with the air inlet sealing joint (6), the air outlet sealing interface (7) and the elastic foil (8) constitutes the gas medium working section (II) of the gas-liquid combined high-speed dynamic pressure sliding bearing.

6. The gas-liquid combined high-speed dynamic pressure sliding bearing according to claim 5, characterized in that: The oil required for the operation of the liquid medium working section (I) of the gas-liquid combined high-speed dynamic pressure sliding bearing enters the interior of the bearing through the oil inlet hole (11) and flows out of the bearing through the oil outlet hole (12).

7. The gas-liquid combined high-speed dynamic pressure sliding bearing according to claim 5, characterized in that: The gas medium required for the operation of the gas medium working section (II) of the gas-liquid combined high-speed dynamic pressure sliding bearing enters the interior of the bearing through the gas pipeline in the gas inlet sealing joint (6) and is discharged from the interior of the bearing through the gas pipeline in the gas outlet sealing interface (7).

8. The gas-liquid combined high-speed dynamic pressure sliding bearing according to claim 7, characterized in that: The elastic foil (8) is filled after the gas medium enters the interior of the bearing through the air inlet sealing joint (6), thereby assisting the gas medium working section (II) of the gas-liquid combined high-speed dynamic pressure sliding bearing to carry the rotating shaft (10).

9. The gas-liquid combined high-speed dynamic pressure sliding bearing according to claim 7, characterized in that: The air intake speed of the air intake airtight joint (6) can be adjusted as required.

10. The gas-liquid combined high-speed dynamic pressure sliding bearing according to claim 1, characterized in that: The gas-liquid isolation ring (5) is installed between the liquid medium working section (I) and the gas medium working section (II) of the gas-liquid combined high-speed dynamic pressure sliding bearing, and the contact surface with the rotating shaft (10) is a wedge-shaped structure.

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