A thrust-face floating gas hydrostatic bearing

Abstract

This utility model relates to the field of gas static pressure bearing technology and discloses a thrust-face floating gas static pressure bearing, including a gas static pressure bearing body. An air inlet pipe is installed on the arc surface of the gas static pressure bearing body. A protective plug is slidably connected to the inner wall of the air inlet pipe, and a protective cover is fixedly connected to one end of the protective plug. Two circular grooves are formed on the inner wall of the air inlet pipe, and a filter screen is slidably connected to the inner wall of the air inlet pipe. Two sliding grooves are formed on the arc surface of the filter screen, and two springs are fixedly connected to the inner wall of the sliding grooves. A round rod is fixedly connected to the other end of each spring. This thrust-face floating gas static pressure bearing solves the problem that in existing gas static pressure bearings, when air is supplied through the air inlet pipe, dust particles in the air enter the bearing interior, causing wear and tear on the internal components due to friction between the particles and impurities, thus affecting the bearing's performance.

Description

Technical Field

[0001] This utility model relates to the field of gas hydrostatic bearing technology, and in particular to a thrust-face floating gas hydrostatic bearing. Background Technology

[0002] Gas static pressure bearings, with their advantages of frictionless operation, high precision, and low temperature rise, are widely used in rotating components of high-end equipment such as precision machine tools and aerospace. Among them, thrust-floating gas static pressure bearings, through the adaptive floating adjustment of the thrust surface, can optimize the uniformity of the gas film clearance and improve axial load capacity. In applications such as precision machining and high-end instruments, gas static pressure bearings have extremely high requirements for the cleanliness and dryness of the input gas.

[0003] Regarding the above and existing related technologies, the inventors believe that the following defects often exist: When existing gas static pressure bearings supply air to the air inlet pipe, dust particles contained in the air will enter the bearing interior during the air supply process. The basic friction between the particulate impurities and the internal components of the bearing will cause wear of the components and affect the performance. Utility Model Content

[0004] The technical problem to be solved by this utility model is that existing gas static pressure bearings have the disadvantage that when air is supplied to the air inlet pipe, dust particles in the air will enter the bearing, and the friction between the particles and the bearing internal components will cause wear of the components and affect the performance. To address this, we propose a thrust-face floating gas static pressure bearing.

[0005] To achieve the above objectives, this application adopts the following technical solution: a thrust-faced floating gas hydrostatic bearing, comprising a gas hydrostatic bearing body, an air inlet pipe installed on the arc surface of the gas hydrostatic bearing body, a protective plug slidably connected to the inner wall of the air inlet pipe, a protective cap fixedly connected to one end of the protective plug, two circular grooves formed on the inner wall of the air inlet pipe, a filter screen slidably connected to the inner wall of the air inlet pipe, two sliding grooves formed on the arc surface of the filter screen, two springs fixedly connected to the inner wall of the sliding grooves, and a round rod fixedly connected to the other end of the two springs. The round rod is slidably connected to the inner wall of the sliding groove, and the size of the round rod is adapted to the size of the circular groove.

[0006] Preferably, the upper surface of the filter screen has two sliding holes, and a slider is fixedly connected to the arc surface of the round rod, the slider being slidably connected to the inner wall of the sliding hole.

[0007] Preferably, the inner wall of the air intake pipe is provided with a positioning groove, and the arc surface of the filter screen is fixedly connected to a positioning block, which is slidably connected to the inner wall of the positioning groove.

[0008] Preferably, a sealing gasket is fixedly connected to the arc surface of the protective plug, and the sealing gasket is made of silicone rubber.

[0009] Preferably, one end of the round rod is hemispherical, and the diameter of the protective plug is adapted to the diameter of the inner wall of the air intake pipe.

[0010] Preferably, the filter screen is made of metal, and the surface of the positioning block is provided with anti-slip protrusions.

[0011] The technical effects and advantages of this utility model are as follows:

[0012] In this invention, by installing a filter screen with a spring and a round rod structure inside the intake pipe, impurities in the gas can be effectively filtered to prevent them from entering the bearing and clogging the throttling orifice or damaging the gas film, thereby ensuring the high-precision operation of the bearing. On the other hand, with the cooperation of the spring and the round rod, the filter screen can be quickly installed and removed, facilitating regular cleaning or replacement and greatly reducing maintenance difficulty. Thus, from the aspects of impurity filtration and convenient maintenance, it provides strong support for the stable and high-precision operation of the bearing. Attached Figure Description

[0013] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts:

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the intake pipe in this utility model;

[0016] Figure 3 This is a schematic diagram of the internal structure of the intake pipe in this utility model;

[0017] Figure 4 This is a schematic diagram of the slide groove in this utility model.

[0018] Legend: 1. Gas hydrostatic bearing body; 2. Inlet pipe; 3. Protective plug; 4. Protective cover; 5. Circular groove; 6. Filter screen; 7. Slide groove; 8. Spring; 9. Circular rod; 10. Slide hole; 11. Slider; 12. Positioning groove; 13. Positioning block; 14. Sealing gasket. Detailed Implementation

[0019] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0020] Reference Figures 1-4As shown, this utility model provides a technical solution: a thrust-faced floating gas static pressure bearing, including a gas static pressure bearing body 1, an air inlet pipe 2 installed on the arc surface of the gas static pressure bearing body 1, a protective plug 3 slidably connected to the inner wall of the air inlet pipe 2, a protective cover 4 fixedly connected to one end of the protective plug 3, two circular grooves 5 opened on the inner wall of the air inlet pipe 2, a filter screen 6 slidably connected to the inner wall of the air inlet pipe 2, two sliding grooves 7 opened on the arc surface of the filter screen 6, two springs 8 fixedly connected to the inner wall of the sliding grooves 7, and a round rod 9 fixedly connected to the other end of the two springs 8. The round rod 9 is slidably connected to the inner wall of the sliding grooves 7, and the size of the round rod 9 is adapted to the size of the circular grooves 5. By installing a filter screen 6 with a spring 8 and a round rod 9 inside the intake pipe 2, impurities in the gas can be effectively filtered to prevent them from entering the bearing and clogging the throttling orifice or damaging the gas film, thus ensuring the high-precision operation of the bearing. On the other hand, with the cooperation of the spring 8 and the round rod 9, the filter screen 6 can be quickly installed and removed, making it easy to clean or replace it regularly, greatly reducing the difficulty of maintenance. Thus, from the aspects of impurity filtration and convenient maintenance, it provides strong support for the stable and high-precision operation of the bearing. Two sliding holes 10 are opened on the upper surface of the filter screen 6, and a slider 11 is fixedly connected to the arc surface of the round rod 9. The slider 11 is slidably connected to the inner wall of the sliding hole 10. The user can directly pull the slider 11, which slides along the sliding hole 10 to move the round rod 9 synchronously, quickly releasing the limiting fit between the round rod 9 and the inner wall groove 5 of the air intake pipe 2. This allows for convenient removal of the filter screen 6 without the need for additional tools, significantly reducing the difficulty of removing the filter screen 6 and improving the efficiency of subsequent cleaning or replacement. It also facilitates bearing maintenance. The inner wall of the air intake pipe 2 has a positioning groove 12, and a positioning block 13 is fixedly connected to the arc surface of the filter screen 6. The positioning block 13 slides against the inner wall of the positioning groove 12. The sliding fit between the positioning groove 12 and the positioning block 13 on the arc surface of the filter screen 6 provides precise guidance during filter screen 6 installation, ensuring that the filter screen 6 quickly aligns with the position of the round groove 5 inside the air intake pipe 2. This prevents the round rod 9 from failing to accurately fit with the round groove 5 due to installation misalignment, improving installation efficiency and allowing operators to quickly remove the filter screen 6 by pulling the positioning block 13. A sealing gasket 14, made of silicone rubber, is fixedly connected to the arc surface of the protective plug 3. The silicone rubber sealing gasket 14 can fit tightly against the inner wall of the air intake pipe 2, significantly improving the sealing performance between the protective plug 3 and the air intake pipe 2. When no air is supplied, it can effectively prevent external dust, water vapor and other impurities from entering the bearing through the gap of the air intake pipe 2, avoiding impurities from contaminating the air passage and damaging the stability of the air film. One end of the round rod 9 is hemispherical, and the diameter of the protective plug 3 is matched with the diameter of the inner wall of the air intake pipe 2.One end of the round rod 9 is designed as a hemispherical structure. When installing the filter screen 6, the hemispherical end can smoothly guide the round rod 9 into the groove 5 on the inner wall of the air inlet pipe 2 through the arc surface, reducing the frictional resistance when the round rod 9 and the groove 5 are aligned, avoiding jamming or wear caused by rigid contact. This helps the round rod 9 to quickly and smoothly enter the groove 5 under the action of the spring 8, improving the installation efficiency of the filter screen 6. The filter screen 6 is made of metal, and the surface of the positioning block 13 is provided with anti-slip protrusions. The filter screen 6 is made of metal, which has good structural strength and wear resistance, and can withstand the pressure impact during gas flow, avoiding the impact of deformation or damage on the filtration effect during long-term use, effectively extending the service life of the filter screen 6. At the same time, the anti-slip protrusions on the surface of the positioning block 13 can increase the frictional contact area between the hand and the positioning block 13, making it easier for the user to hold and pull the positioning block 13 more firmly when installing or removing the filter screen 6, reducing the risk of slippage during operation, and further improving the convenience and efficiency of the filter screen 6 installation and removal process.

[0021] Working principle: In the non-working state, the protective plug 3 is tightly attached to the inner wall of the air inlet pipe 2 through the silicone rubber sealing gasket 14, thereby sealing the air inlet pipe 2 and preventing external dust, moisture and other impurities from entering the bearing. When working, first pull the protective cover 4 to make the protective plug 3 slide out from the air inlet pipe 2, so that the air inlet pipe 2 is open. External pressurized gas is delivered to the bearing body along the air inlet pipe 2. During the process, the gas first passes through the metal filter screen 6. The filter screen 6 intercepts impurities in the gas, preventing impurities from entering the bearing and blocking the throttling orifice or damaging the gas film, thus ensuring the stable and high-precision operation of the bearing thrust surface floating adjustment function.

[0022] When the filter screen 6 needs maintenance, the user can pull the positioning block 13 using the anti-slip protrusions on its surface. At the same time, the slider 11 in the sliding hole 10 drives the round rod 9 to slide along the sliding groove 7, causing the round rod 9 to compress the spring 8 and disengage from the round groove 5 on the inner wall of the air intake pipe 2, thus releasing the restriction on the filter screen 6. After disassembly, the filter screen 6 can be cleaned or replaced. When reinstalling, the positioning groove 12 on the inner wall of the air intake pipe 2 and the positioning block 13 slide together to achieve precise guidance of the filter screen 6, ensuring that the round rod 9 is aligned with the round groove 5. After releasing the slider 11, the spring 8 returns to its original position and pushes the round rod 9 into the round groove 5, thus fixing the filter screen 6. The entire maintenance process requires no additional tools and is easy to operate. Furthermore, the hemispherical end of the round rod 9 can reduce the frictional resistance with the round groove 5 during installation, ensuring smooth assembly and further maintaining the long-term stable operation of the bearing.

[0023] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A thrust-faced floating gas hydrostatic bearing, characterized in that, The system includes a gas static pressure bearing body (1), an air inlet pipe (2) installed on the arc surface of the gas static pressure bearing body (1), a protective plug (3) slidably connected to the inner wall of the air inlet pipe (2), a protective cover (4) fixedly connected to one end of the protective plug (3), two circular grooves (5) opened on the inner wall of the air inlet pipe (2), a filter screen (6) slidably connected to the inner wall of the air inlet pipe (2), two sliding grooves (7) opened on the arc surface of the filter screen (6), two springs (8) fixedly connected to the inner wall of the sliding grooves (7), and a round rod (9) fixedly connected to the other end of the two springs (8). The round rod (9) is slidably connected to the inner wall of the sliding grooves (7), and the size of the round rod (9) is adapted to the size of the circular grooves (5).

2. The thrust-face floating gas hydrostatic bearing according to claim 1, characterized in that: The filter screen (6) has two sliding holes (10) on its upper surface. The circular rod (9) has a slider (11) fixedly connected to its arc surface. The slider (11) is slidably connected to the inner wall of the sliding hole (10).

3. The thrust-face floating gas hydrostatic bearing according to claim 1, characterized in that: The inner wall of the air intake pipe (2) is provided with a positioning groove (12), and the arc surface of the filter screen (6) is fixedly connected with a positioning block (13), and the positioning block (13) is slidably connected to the inner wall of the positioning groove (12).

4. A thrust-faced floating gas hydrostatic bearing according to claim 1, characterized in that: The protective plug (3) has a sealing gasket (14) fixedly connected to its arc surface. The sealing gasket (14) is made of silicone rubber.

5. A thrust-face floating gas hydrostatic bearing according to claim 1, characterized in that: One end of the round rod (9) is hemispherical, and the diameter of the protective plug (3) is adapted to the diameter of the inner wall of the air inlet pipe (2).

6. A thrust-face floating gas hydrostatic bearing according to claim 1, characterized in that: The filter screen (6) is made of metal, and the surface of the positioning block (13) is provided with anti-slip protrusions.

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