Non-contact high-speed rotating air pressure sealing groove

Abstract

The utility model is applicable to the technical field of sealing, and provides a non-contact high-speed rotating air pressure sealing groove, which comprises an air pressure sealing seat, a plurality of rotating grooves with angles and a plurality of rotating grooves with angles, the fixing sleeve is installed on the outer side of the air pressure sealing seat, and the fixing sleeve and the air pressure sealing seat jointly form a sealing area; and the locking chuck is tightly connected with the air pressure sealing seat through threads and is used for clamping and fixing the workpiece on the rotating main shaft. According to the utility model, the vibration caused by contact friction is reduced, and the processing precision is improved; impurities such as cooling water and scrap iron are prevented from entering a sealing area through the air pressure effect generated when the rotary groove with the angle rotates at a high speed; the locking chuck is tightly connected with the air pressure sealing seat through threads, so that mounting and dismounting are convenient; the device is suitable for scenes needing high-speed rotation and axial movement in the outer circle machining process of a workpiece, and meanwhile the requirement that the workpiece needs to be washed by cooling water in the machining process is met; and the manufacturing cost is reduced. And meanwhile, the rotation precision and stability are ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of sealing, and particularly relates to a non-contact high-speed rotating air pressure sealing groove. Background Technique

[0002] In the problem of clearance sealing between high-speed rotating parts and fixed sleeves, there is usually a need to effectively isolate water, oil or dust. Currently, the main methods used include skeleton seals, vent seals, and clearance seals, etc.

[0003] The skeleton seal belongs to a contact sealing method, which consists of an internal elastic steel ring and an outer wear-resistant rubber. Through the action of the elastic steel ring, the rubber part forms a frictional force with the surface of the rotating part, thereby achieving sealing. However, this method will increase the rotational resistance and may exacerbate vibration, which in turn affects the runout of the workpiece. The vent seal is to introduce gas to assist in sealing. Although it can provide a certain sealing effect, it often brings an increase in cost. The clearance seal relies on the clearance between the rotating part and the fixed sleeve for sealing, but due to the existence of the clearance, its sealing effect is not ideal.

[0004] The labyrinth seal adopts a labyrinth structure design, and prevents fluid penetration through the tortuous path formed between the rotating part and the fixed sleeve. However, this sealing method requires that the rotating part cannot have axial movement, and due to its relatively complex structure, involving more components and a more cumbersome installation process, there are also certain special requirements for the operating environmental conditions. To sum up, each sealing method has its specific application scenarios and limitations. Therefore, a non-contact high-speed rotating air pressure sealing groove is proposed. Content of the Utility Model

[0005] The purpose of the utility model is to provide a non-contact high-speed rotating air pressure sealing groove, aiming to solve the problems proposed in the above background technique.

[0006] The embodiment of the utility model is implemented as follows. The non-contact high-speed rotating air pressure sealing groove includes:

[0007] An air pressure sealing seat, on the outer circle of which several angled rotary grooves are machined;

[0008] A fixed sleeve, which is installed outside the air pressure sealing seat, and the fixed sleeve is used for support, and the fixed sleeve and the air pressure sealing seat jointly form a sealing area;

[0009] A locking chuck, which is tightly connected to the air pressure sealing seat by threads, and the locking chuck is used to clamp and fix the workpiece on the rotating spindle.

[0010] Further, the cross-sectional shape of the rotary groove consists of two parts. One part is a vertical wall that is perpendicular to the rotation axis of the pneumatic seal seat, and the other part is an inclined wall that intersects with the vertical wall and forms an angle of 75°.

[0011] Further, the distance between the end of the inclined wall and the vertical wall in the horizontal direction is 4 mm.

[0012] Further, an external thread is provided at one end of the locking chuck close to the pneumatic seal seat, and an internal thread is provided in the pneumatic seal seat, and the internal thread is adapted to the external thread.

[0013] Further, a hole is provided in the pneumatic seal seat for the workpiece and the locking chuck to pass through.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] 1. No increased vibration: The non-contact seal design of the present utility model reduces the vibration generated by contact friction, thereby ensuring the stability of the workpiece during high-speed rotation and axial movement, and improving the machining accuracy.

[0016] 2. Thorough sealing: Through the pneumatic effect generated by the angled rotary groove during high-speed rotation, an effective non-contact seal barrier is formed to prevent impurities such as cooling water and iron filings from entering the sealed area, ensuring the cleanliness and operation stability of the system.

[0017] 3. Easy installation: The locking chuck is tightly connected to the pneumatic seal seat through threads, and this connection method is simple and reliable, facilitating installation and disassembly.

[0018] 4. Meeting the application scenario: The present utility model is particularly suitable for scenarios where high-speed rotation and axial movement are required during the external circle machining of workpieces, and at the same time meets the requirement of flushing the workpiece with cooling water during the machining process.

[0019] 5. Simple structure and low cost: The structure design of the present utility model is simple, without complex mechanical components and control systems, reducing the manufacturing cost. At the same time, due to the uniform quality of each component and the absence of centrifugal force influence, the rotation accuracy and stability are ensured. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of a non-contact high-speed rotation pneumatic seal groove.

[0021] Figure 2 It is a schematic structural diagram of the pneumatic seal seat in the non-contact high-speed rotation pneumatic seal groove.

[0022] In the figure: pneumatic seal seat 1, fixed sleeve 2, workpiece 3, locking chuck 4. Detailed Embodiment

[0023] In order to make the objectives, technical solutions and advantages of the present utility model more clear and understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0024] The following describes in detail the specific implementation of the present utility model in conjunction with specific embodiments.

[0025] As Figure 1 and Figure 2 shown, a non-contact high-speed rotating pneumatic sealing groove provided by an embodiment of the present utility model includes a pneumatic sealing seat 1, a fixed sleeve 2 and a locking chuck 4;

[0026] The pneumatic sealing seat 1 is the core component. The pneumatic sealing seat 1 is machined with angled rotary grooves on its outer circumference. These rotary grooves can generate air pressure during high-speed rotation, forming an effective non-contact sealing barrier to prevent impurities such as cooling water and iron filings from entering the gap between the pneumatic sealing seat 1 and the fixed sleeve 2.

[0027] The fixed sleeve 2 is the stationary part. It is installed outside the pneumatic sealing seat 1 but does not rotate with it. The main function of the fixed sleeve 2 is to jointly form a sealing area with a gap of 0.25 mm with the pneumatic sealing seat 1 to ensure that a pneumatic sealing effect can be formed after rotation.

[0028] The locking chuck 4 is tightly connected to the pneumatic sealing seat 1 by threads. The locking chuck 4 clamps and fixes the workpiece 3 on the rotating spindle. It not only ensures the stability and accuracy of the workpiece 3 but also realizes a reliable connection with the pneumatic sealing seat 1 through its structural design.

[0029] In the embodiment of the present utility model, the workpiece 3 is installed on the rotating spindle through the pneumatic sealing seat 1 and the locking chuck 4 (the spindle is not drawn). When the workpiece 3 performs rotational motion and axial motion, the fixed sleeve 2 remains stationary. The locking chuck 4 can adopt common clamping mechanisms in the prior art (such as clamping jaws, chucks, etc.) to clamp the workpiece 3 to ensure the stability and accuracy of the workpiece 3 during rotation and axial motion.

[0030] The working process is as follows: When starting to work, the locking chuck 4 rotates at high speed with the rotating spindle. The locking chuck 4 drives the workpiece 3 to rotate at high speed. At the same time, the pneumatic sealing seat 1 rotates at high speed. Since the outer circumference of the pneumatic sealing seat 1 is machined with angled rotary grooves, these rotary grooves will generate a pneumatic effect during rotation. As the rotational speed increases, the air pressure gradually increases, forming a non-contact sealing barrier. This barrier effectively prevents impurities such as cooling water and iron filings from entering the gap between the pneumatic sealing seat 1 and the fixed sleeve 2, thereby ensuring the cleanliness and operating stability of the system.

[0031] As Figure 1 and Figure 2 shown, as a preferred embodiment of the present utility model, the cross-sectional shape of the rotary groove consists of two parts: one part is a vertical wall, which is perpendicular to the rotation axis of the pneumatic seal seat 1; the other part is an inclined wall, which intersects with the vertical wall and forms an angle of 75°. The distance between the end of the inclined wall and the vertical wall in the horizontal direction is 4 mm.

[0032] As Figure 1 shown, as a preferred embodiment of the present utility model, the end of the locking chuck 4 close to the pneumatic seal seat 1 is provided with an external thread, and the pneumatic seal seat 1 is provided with an internal thread, and the internal thread is adapted to the external thread, thereby ensuring the tightness and reliability of the connection.

[0033] As Figure 2 shown, as a preferred embodiment of the present utility model, the pneumatic seal seat 1 is provided with holes for the workpiece 3 and the locking chuck 4 to pass through.

[0034] The working principle of the present utility model is:

[0035] When starting to work, the locking chuck 4 rotates at a high speed along with the rotating spindle, the locking chuck 4 drives the workpiece 3 to rotate at a high speed, and at the same time the pneumatic seal seat 1 rotates at a high speed. Since the outer circle of the pneumatic seal seat 1 is processed with angled rotary grooves, these rotary grooves will generate a pneumatic effect during the rotation process. As the rotational speed increases, the air pressure gradually increases, forming a non-contact sealing barrier. This barrier effectively prevents impurities such as cooling water and iron filings from entering the gap between the pneumatic seal seat 1 and the fixed sleeve 2, thereby ensuring the cleanliness and operation stability of the system. At the same time, the locking chuck 4 stably fixes the workpiece 3 on the rotating spindle through its strong clamping force, ensuring the accuracy and reliability of the workpiece during rotation and axial movement.

[0036] The above is only the preferred embodiment of the present utility model. It should be noted that for those skilled in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these should also be regarded as the protection scope of the present utility model, and these will not affect the implementation effect of the present utility model and the practicality of the patent.

Claims

1. Non-contact high-speed rotating air pressure sealing groove, characterized in that, Comprising: A pneumatic seal seat, on the outer circle of which several angled rotary grooves are machined; the cross-sectional shape of the rotary groove consists of two parts, one part is a vertical wall perpendicular to the rotation axis of the pneumatic seal seat, and the other part is an inclined wall that intersects with the vertical wall and forms an angle of 75°; A fixed sleeve, which is installed outside the pneumatic seal seat, and the fixed sleeve and the pneumatic seal seat together form a sealed area; A locking chuck, which is tightly connected to the pneumatic seal seat by a thread, and the locking chuck is used to clamp and fix the workpiece on the rotating spindle.

2. The non-contact high-speed rotating air pressure sealing groove according to claim 1, characterized in that, The distance between the end of the inclined wall and the vertical wall in the horizontal direction is 4 mm.

3. The non-contact high-speed rotating air pressure seal groove according to claim 1, characterized in that One end of the locking chuck close to the pneumatic seal seat is provided with an external thread, and the pneumatic seal seat is provided with an internal thread, and the internal thread is adapted to the external thread.

4. The non-contact high-speed rotating pneumatic seal groove according to claim 1, characterized in that A hole for the workpiece and the locking chuck to pass through is opened on the pneumatic seal seat.

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